first version of the LAC functionality

[l2tpns.git] / l2tpns.c

diff --git a/l2tpns.c b/l2tpns.c
index 5c7289c..d4bb9ca 100644 (file)
--- a/l2tpns.c
+++ b/l2tpns.c
@@ -1,11 +1,9 @@
 // L2TP Network Server
 // Adrian Kennard 2002
 // L2TP Network Server
 // Adrian Kennard 2002

-// Copyright (c) 2003, 2004, 2005 Optus Internet Engineering
+// Copyright (c) 2003, 2004, 2005, 2006 Optus Internet Engineering

 // Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced
 // vim: sw=8 ts=8
 
 // Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced
 // vim: sw=8 ts=8
 

-char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.160 2006/04/13 11:14:35 bodea Exp $";
-

 #include <arpa/inet.h>
 #include <assert.h>
 #include <errno.h>
 #include <arpa/inet.h>
 #include <assert.h>
 #include <errno.h>


@@ -14,7 +12,6 @@ char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.160 2006/04/13 11:14:35 bodea Exp
 #define SYSLOG_NAMES
 #include <syslog.h>
 #include <malloc.h>
 #define SYSLOG_NAMES
 #include <syslog.h>
 #include <malloc.h>

-#include <math.h>

 #include <net/route.h>
 #include <sys/mman.h>
 #include <netdb.h>
 #include <net/route.h>
 #include <sys/mman.h>
 #include <netdb.h>


@@ -31,7 +28,7 @@ char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.160 2006/04/13 11:14:35 bodea Exp
 #include <sys/time.h>
 #include <sys/resource.h>
 #include <sys/wait.h>
 #include <sys/time.h>
 #include <sys/resource.h>
 #include <sys/wait.h>

-#include <linux/if.h>
+#include <net/if.h>

 #include <stddef.h>
 #include <time.h>
 #include <dlfcn.h>
 #include <stddef.h>
 #include <time.h>
 #include <dlfcn.h>


@@ -39,6 +36,8 @@ char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.160 2006/04/13 11:14:35 bodea Exp
 #include <sched.h>
 #include <sys/sysinfo.h>
 #include <libcli.h>
 #include <sched.h>
 #include <sys/sysinfo.h>
 #include <libcli.h>

+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>

 
 #include "md5.h"
 #include "l2tpns.h"
 
 #include "md5.h"
 #include "l2tpns.h"


@@ -54,8 +53,18 @@ char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.160 2006/04/13 11:14:35 bodea Exp
 #include "bgp.h"
 #endif
 
 #include "bgp.h"
 #endif
 

+#ifdef LAC
+#include "l2tplac.h"
+#endif
+
+#ifdef LAC
+char * Vendor_name = "Linux L2TPNS";
+uint32_t call_serial_number = 0;
+#endif
+

 // Globals
 configt *config = NULL;                // all configuration
 // Globals
 configt *config = NULL;                // all configuration

+int nlfd = -1;                 // netlink socket

 int tunfd = -1;                        // tun interface file handle. (network device)
 int udpfd = -1;                        // UDP file handle
 int controlfd = -1;            // Control signal handle
 int tunfd = -1;                        // tun interface file handle. (network device)
 int udpfd = -1;                        // UDP file handle
 int controlfd = -1;            // Control signal handle


@@ -63,17 +72,20 @@ int clifd = -1;                     // Socket listening for CLI connections.
 int daefd = -1;                        // Socket listening for DAE connections.
 int snoopfd = -1;              // UDP file handle for sending out intercept data
 int *radfds = NULL;            // RADIUS requests file handles
 int daefd = -1;                        // Socket listening for DAE connections.
 int snoopfd = -1;              // UDP file handle for sending out intercept data
 int *radfds = NULL;            // RADIUS requests file handles

-int ifrfd = -1;                        // File descriptor for routing, etc
-int ifr6fd = -1;               // File descriptor for IPv6 routing, etc

 int rand_fd = -1;              // Random data source
 int cluster_sockfd = -1;       // Intra-cluster communications socket.
 int epollfd = -1;              // event polling
 time_t basetime = 0;           // base clock
 int rand_fd = -1;              // Random data source
 int cluster_sockfd = -1;       // Intra-cluster communications socket.
 int epollfd = -1;              // event polling
 time_t basetime = 0;           // base clock

-char hostname[1000] = "";      // us.
+char hostname[MAXHOSTNAME] = "";       // us.

 static int tunidx;             // ifr_ifindex of tun device
 static int tunidx;             // ifr_ifindex of tun device

+int nlseqnum = 0;              // netlink sequence number
+int min_initok_nlseqnum = 0;   // minimun seq number for messages after init is ok

 static int syslog_log = 0;     // are we logging to syslog
 static FILE *log_stream = 0;   // file handle for direct logging (i.e. direct into file, not via syslog).
 uint32_t last_id = 0;          // Unique ID for radius accounting
 static int syslog_log = 0;     // are we logging to syslog
 static FILE *log_stream = 0;   // file handle for direct logging (i.e. direct into file, not via syslog).
 uint32_t last_id = 0;          // Unique ID for radius accounting

+// Guest change
+char guest_users[10][32];       // Array of guest users
+int guest_accounts_num = 0;     // Number of guest users

 
 // calculated from config->l2tp_mtu
 uint16_t MRU = 0;              // PPP MRU
 
 // calculated from config->l2tp_mtu
 uint16_t MRU = 0;              // PPP MRU


@@ -82,9 +94,13 @@ uint16_t MSS = 0;            // TCP MSS
 struct cli_session_actions *cli_session_actions = NULL;        // Pending session changes requested by CLI
 struct cli_tunnel_actions *cli_tunnel_actions = NULL;  // Pending tunnel changes required by CLI
 
 struct cli_session_actions *cli_session_actions = NULL;        // Pending session changes requested by CLI
 struct cli_tunnel_actions *cli_tunnel_actions = NULL;  // Pending tunnel changes required by CLI
 

-static void *ip_hash[256];     // Mapping from IP address to session structures.
+union iphash {
+       sessionidt sess;
+       union iphash *idx;
+} ip_hash[256];                        // Mapping from IP address to session structures.
+

 struct ipv6radix {
 struct ipv6radix {

-       int sess;
+       sessionidt sess;

        struct ipv6radix *branch;
 } ipv6_hash[256];              // Mapping from IPv6 address to session structures.
 
        struct ipv6radix *branch;
 } ipv6_hash[256];              // Mapping from IPv6 address to session structures.
 


@@ -95,6 +111,7 @@ uint32_t eth_tx = 0;
 
 static uint32_t ip_pool_size = 1;      // Size of the pool of addresses used for dynamic address allocation.
 time_t time_now = 0;                   // Current time in seconds since epoch.
 
 static uint32_t ip_pool_size = 1;      // Size of the pool of addresses used for dynamic address allocation.
 time_t time_now = 0;                   // Current time in seconds since epoch.

+uint64_t time_now_ms = 0;              // Current time in milliseconds since epoch.

 static char time_now_string[64] = {0}; // Current time as a string.
 static int time_changed = 0;           // time_now changed
 char main_quit = 0;                    // True if we're in the process of exiting.
 static char time_now_string[64] = {0}; // Current time as a string.
 static int time_changed = 0;           // time_now changed
 char main_quit = 0;                    // True if we're in the process of exiting.


@@ -126,14 +143,17 @@ config_descriptt config_values[] = {
        CONFIG("radius_secret", radiussecret, STRING),
        CONFIG("radius_authtypes", radius_authtypes_s, STRING),
        CONFIG("radius_dae_port", radius_dae_port, SHORT),
        CONFIG("radius_secret", radiussecret, STRING),
        CONFIG("radius_authtypes", radius_authtypes_s, STRING),
        CONFIG("radius_dae_port", radius_dae_port, SHORT),

+       CONFIG("radius_bind_min", radius_bind_min, SHORT),
+       CONFIG("radius_bind_max", radius_bind_max, SHORT),

        CONFIG("allow_duplicate_users", allow_duplicate_users, BOOL),
        CONFIG("allow_duplicate_users", allow_duplicate_users, BOOL),

+       CONFIG("kill_timedout_sessions", kill_timedout_sessions, BOOL),
+       CONFIG("guest_account", guest_user, STRING),

        CONFIG("bind_address", bind_address, IPv4),
        CONFIG("peer_address", peer_address, IPv4),
        CONFIG("send_garp", send_garp, BOOL),
        CONFIG("throttle_speed", rl_rate, UNSIGNED_LONG),
        CONFIG("throttle_buckets", num_tbfs, INT),
        CONFIG("accounting_dir", accounting_dir, STRING),
        CONFIG("bind_address", bind_address, IPv4),
        CONFIG("peer_address", peer_address, IPv4),
        CONFIG("send_garp", send_garp, BOOL),
        CONFIG("throttle_speed", rl_rate, UNSIGNED_LONG),
        CONFIG("throttle_buckets", num_tbfs, INT),
        CONFIG("accounting_dir", accounting_dir, STRING),

-       CONFIG("setuid", target_uid, INT),

        CONFIG("dump_speed", dump_speed, BOOL),
        CONFIG("multi_read_count", multi_read_count, INT),
        CONFIG("scheduler_fifo", scheduler_fifo, BOOL),
        CONFIG("dump_speed", dump_speed, BOOL),
        CONFIG("multi_read_count", multi_read_count, INT),
        CONFIG("scheduler_fifo", scheduler_fifo, BOOL),


@@ -147,6 +167,14 @@ config_descriptt config_values[] = {
        CONFIG("cluster_hb_timeout", cluster_hb_timeout, INT),
        CONFIG("cluster_master_min_adv", cluster_master_min_adv, INT),
        CONFIG("ipv6_prefix", ipv6_prefix, IPv6),
        CONFIG("cluster_hb_timeout", cluster_hb_timeout, INT),
        CONFIG("cluster_master_min_adv", cluster_master_min_adv, INT),
        CONFIG("ipv6_prefix", ipv6_prefix, IPv6),

+       CONFIG("cli_bind_address", cli_bind_address, IPv4),
+       CONFIG("hostname", hostname, STRING),
+#ifdef BGP
+       CONFIG("nexthop_address", nexthop_address, IPv4),
+       CONFIG("nexthop6_address", nexthop6_address, IPv6),
+#endif
+       CONFIG("echo_timeout", echo_timeout, INT),
+       CONFIG("idle_echo_timeout", idle_echo_timeout, INT),

        { NULL, 0, 0, 0 },
 };
 
        { NULL, 0, 0, 0 },
 };
 


@@ -154,8 +182,6 @@ static char *plugin_functions[] = {
        NULL,
        "plugin_pre_auth",
        "plugin_post_auth",
        NULL,
        "plugin_pre_auth",
        "plugin_post_auth",

-       "plugin_packet_rx",
-       "plugin_packet_tx",

        "plugin_timer",
        "plugin_new_session",
        "plugin_kill_session",
        "plugin_timer",
        "plugin_new_session",
        "plugin_kill_session",


@@ -174,6 +200,8 @@ static sessiont shut_acct[8192];
 static sessionidt shut_acct_n = 0;
 
 tunnelt *tunnel = NULL;                        // Array of tunnel structures.
 static sessionidt shut_acct_n = 0;
 
 tunnelt *tunnel = NULL;                        // Array of tunnel structures.

+bundlet *bundle = NULL;                        // Array of bundle structures.
+fragmentationt *frag = NULL;           // Array of fragmentation structures.

 sessiont *session = NULL;              // Array of session structures.
 sessionlocalt *sess_local = NULL;      // Array of local per-session counters.
 radiust *radius = NULL;                        // Array of radius structures.
 sessiont *session = NULL;              // Array of session structures.
 sessionlocalt *sess_local = NULL;      // Array of local per-session counters.
 radiust *radius = NULL;                        // Array of radius structures.


@@ -185,9 +213,11 @@ struct Tstats *_statistics = NULL;
 struct Tringbuffer *ringbuffer = NULL;
 #endif
 
 struct Tringbuffer *ringbuffer = NULL;
 #endif
 

-static void cache_ipmap(in_addr_t ip, int s);
+static ssize_t netlink_send(struct nlmsghdr *nh);
+static void netlink_addattr(struct nlmsghdr *nh, int type, const void *data, int alen);
+static void cache_ipmap(in_addr_t ip, sessionidt s);

 static void uncache_ipmap(in_addr_t ip);
 static void uncache_ipmap(in_addr_t ip);

-static void cache_ipv6map(struct in6_addr ip, int prefixlen, int s);
+static void cache_ipv6map(struct in6_addr ip, int prefixlen, sessionidt s);

 static void free_ip_address(sessionidt s);
 static void dump_acct_info(int all);
 static void sighup_handler(int sig);
 static void free_ip_address(sessionidt s);
 static void dump_acct_info(int all);
 static void sighup_handler(int sig);


@@ -203,13 +233,7 @@ static void plugins_done(void);
 static void processcontrol(uint8_t *buf, int len, struct sockaddr_in *addr, int alen, struct in_addr *local);
 static tunnelidt new_tunnel(void);
 static void unhide_value(uint8_t *value, size_t len, uint16_t type, uint8_t *vector, size_t vec_len);
 static void processcontrol(uint8_t *buf, int len, struct sockaddr_in *addr, int alen, struct in_addr *local);
 static tunnelidt new_tunnel(void);
 static void unhide_value(uint8_t *value, size_t len, uint16_t type, uint8_t *vector, size_t vec_len);

-
-// on slaves, alow BGP to withdraw cleanly before exiting
-#define QUIT_DELAY     5
-
-// quit actions (master)
-#define QUIT_FAILOVER  1 // SIGTERM: exit when all control messages have been acked (for cluster failover)
-#define QUIT_SHUTDOWN  2 // SIGQUIT: shutdown sessions/tunnels, reject new connections
+static void bundleclear(bundleidt b);

 
 // return internal time (10ths since process startup), set f if given
 // as a side-effect sets time_now, and time_changed
 
 // return internal time (10ths since process startup), set f if given
 // as a side-effect sets time_now, and time_changed


@@ -223,6 +247,10 @@ static clockt now(double *f)
            time_now = t.tv_sec;
            time_changed++;
        }
            time_now = t.tv_sec;
            time_changed++;
        }

+
+       // Time in milliseconds
+       time_now_ms = (t.tv_sec * 1000) + (t.tv_usec/1000);
+

        return (t.tv_sec - basetime) * 10 + t.tv_usec / 100000 + 1;
 }
 
        return (t.tv_sec - basetime) * 10 + t.tv_usec / 100000 + 1;
 }
 


@@ -403,43 +431,65 @@ void random_data(uint8_t *buf, int len)
 // via BGP if enabled, and stuffs it into the
 // 'sessionbyip' cache.
 //
 // via BGP if enabled, and stuffs it into the
 // 'sessionbyip' cache.
 //

-// 'ip' and 'mask' must be in _host_ order.
+// 'ip' must be in _host_ order.

 //
 //

-static void routeset(sessionidt s, in_addr_t ip, in_addr_t mask, in_addr_t gw, int add)
+static void routeset(sessionidt s, in_addr_t ip, int prefixlen, in_addr_t gw, int add)

 {
 {

-       struct rtentry r;
+       struct {
+               struct nlmsghdr nh;
+               struct rtmsg rt;
+               char buf[32];
+       } req;

        int i;
        int i;

+       in_addr_t n_ip;

 
 

-       if (!mask) mask = 0xffffffff;
+       if (!prefixlen) prefixlen = 32;

 
 

-       ip &= mask;             // Force the ip to be the first one in the route.
+       ip &= 0xffffffff << (32 - prefixlen);;  // Force the ip to be the first one in the route.

 
 

-       memset(&r, 0, sizeof(r));
-       r.rt_dev = config->tundevice;
-       r.rt_dst.sa_family = AF_INET;
-       *(uint32_t *) & (((struct sockaddr_in *) &r.rt_dst)->sin_addr.s_addr) = htonl(ip);
-       r.rt_gateway.sa_family = AF_INET;
-       *(uint32_t *) & (((struct sockaddr_in *) &r.rt_gateway)->sin_addr.s_addr) = htonl(gw);
-       r.rt_genmask.sa_family = AF_INET;
-       *(uint32_t *) & (((struct sockaddr_in *) &r.rt_genmask)->sin_addr.s_addr) = htonl(mask);
-       r.rt_flags = (RTF_UP | RTF_STATIC);
+       memset(&req, 0, sizeof(req));
+
+       if (add)
+       {
+               req.nh.nlmsg_type = RTM_NEWROUTE;
+               req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE;
+       }
+       else
+       {
+               req.nh.nlmsg_type = RTM_DELROUTE;
+               req.nh.nlmsg_flags = NLM_F_REQUEST;
+       }
+
+       req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.rt));
+
+       req.rt.rtm_family = AF_INET;
+       req.rt.rtm_dst_len = prefixlen;
+       req.rt.rtm_table = RT_TABLE_MAIN;
+       req.rt.rtm_protocol = 42;
+       req.rt.rtm_scope = RT_SCOPE_LINK;
+       req.rt.rtm_type = RTN_UNICAST;
+
+       netlink_addattr(&req.nh, RTA_OIF, &tunidx, sizeof(int));
+       n_ip = htonl(ip);
+       netlink_addattr(&req.nh, RTA_DST, &n_ip, sizeof(n_ip));

        if (gw)
        if (gw)

-               r.rt_flags |= RTF_GATEWAY;
-       else if (mask == 0xffffffff)
-               r.rt_flags |= RTF_HOST;
+       {
+               n_ip = htonl(gw);
+               netlink_addattr(&req.nh, RTA_GATEWAY, &n_ip, sizeof(n_ip));
+       }

 
 

-       LOG(1, s, 0, "Route %s %s/%s%s%s\n", add ? "add" : "del",
-           fmtaddr(htonl(ip), 0), fmtaddr(htonl(mask), 1),
+       LOG(1, s, session[s].tunnel, "Route %s %s/%d%s%s\n", add ? "add" : "del",
+           fmtaddr(htonl(ip), 0), prefixlen,

            gw ? " via" : "", gw ? fmtaddr(htonl(gw), 2) : "");
 
            gw ? " via" : "", gw ? fmtaddr(htonl(gw), 2) : "");
 

-       if (ioctl(ifrfd, add ? SIOCADDRT : SIOCDELRT, (void *) &r) < 0)
-               LOG(0, 0, 0, "routeset() error in ioctl: %s\n", strerror(errno));
+       if (netlink_send(&req.nh) < 0)
+               LOG(0, 0, 0, "routeset() error in sending netlink message: %s\n", strerror(errno));

 
 #ifdef BGP
        if (add)
 
 #ifdef BGP
        if (add)

-               bgp_add_route(htonl(ip), htonl(mask));
+               bgp_add_route(htonl(ip), prefixlen);

        else
        else

-               bgp_del_route(htonl(ip), htonl(mask));
+               bgp_del_route(htonl(ip), prefixlen);

 #endif /* BGP */
 
                // Add/Remove the IPs to the 'sessionbyip' cache.
 #endif /* BGP */
 
                // Add/Remove the IPs to the 'sessionbyip' cache.


@@ -455,40 +505,68 @@ static void routeset(sessionidt s, in_addr_t ip, in_addr_t mask, in_addr_t gw, i
                if (!add)       // Are we deleting a route?
                        s = 0;  // Caching the session as '0' is the same as uncaching.
 
                if (!add)       // Are we deleting a route?
                        s = 0;  // Caching the session as '0' is the same as uncaching.
 

-               for (i = ip; (i&mask) == (ip&mask) ; ++i)
+               for (i = ip; i < ip+(1<<(32-prefixlen)) ; ++i)

                        cache_ipmap(i, s);
        }
 }
 
 void route6set(sessionidt s, struct in6_addr ip, int prefixlen, int add)
 {
                        cache_ipmap(i, s);
        }
 }
 
 void route6set(sessionidt s, struct in6_addr ip, int prefixlen, int add)
 {

-       struct in6_rtmsg rt;
+       struct {
+               struct nlmsghdr nh;
+               struct rtmsg rt;
+               char buf[64];
+       } req;
+       int metric;

        char ipv6addr[INET6_ADDRSTRLEN];
 
        char ipv6addr[INET6_ADDRSTRLEN];
 

-       if (ifr6fd < 0)
+       if (!config->ipv6_prefix.s6_addr[0])

        {
                LOG(0, 0, 0, "Asked to set IPv6 route, but IPv6 not setup.\n");
                return;
        }
 
        {
                LOG(0, 0, 0, "Asked to set IPv6 route, but IPv6 not setup.\n");
                return;
        }
 

-       memset(&rt, 0, sizeof(rt));
+       memset(&req, 0, sizeof(req));
+
+       if (add)
+       {
+               req.nh.nlmsg_type = RTM_NEWROUTE;
+               req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE;
+       }
+       else
+       {
+               req.nh.nlmsg_type = RTM_DELROUTE;
+               req.nh.nlmsg_flags = NLM_F_REQUEST;
+       }
+
+       req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.rt));

 
 

-       memcpy(&rt.rtmsg_dst, &ip, sizeof(struct in6_addr));
-       rt.rtmsg_dst_len = prefixlen;
-       rt.rtmsg_metric = 1;
-       rt.rtmsg_flags = RTF_UP;
-       rt.rtmsg_ifindex = tunidx;
+       req.rt.rtm_family = AF_INET6;
+       req.rt.rtm_dst_len = prefixlen;
+       req.rt.rtm_table = RT_TABLE_MAIN;
+       req.rt.rtm_protocol = 42;
+       req.rt.rtm_scope = RT_SCOPE_LINK;
+       req.rt.rtm_type = RTN_UNICAST;

 
 

-       LOG(1, 0, 0, "Route %s %s/%d\n",
+       netlink_addattr(&req.nh, RTA_OIF, &tunidx, sizeof(int));
+       netlink_addattr(&req.nh, RTA_DST, &ip, sizeof(ip));
+       metric = 1;
+       netlink_addattr(&req.nh, RTA_METRICS, &metric, sizeof(metric));
+
+       LOG(1, s, session[s].tunnel, "Route %s %s/%d\n",

            add ? "add" : "del",
            inet_ntop(AF_INET6, &ip, ipv6addr, INET6_ADDRSTRLEN),
            prefixlen);
 
            add ? "add" : "del",
            inet_ntop(AF_INET6, &ip, ipv6addr, INET6_ADDRSTRLEN),
            prefixlen);
 

-       if (ioctl(ifr6fd, add ? SIOCADDRT : SIOCDELRT, (void *) &rt) < 0)
-               LOG(0, 0, 0, "route6set() error in ioctl: %s\n",
-                               strerror(errno));
+       if (netlink_send(&req.nh) < 0)
+               LOG(0, 0, 0, "route6set() error in sending netlink message: %s\n", strerror(errno));

 
 

-       // FIXME: need to add BGP routing (RFC2858)
+#ifdef BGP
+       if (add)
+               bgp_add_route6(ip, prefixlen);
+       else
+               bgp_del_route6(ip, prefixlen);
+#endif /* BGP */

 
        if (s)
        {
 
        if (s)
        {


@@ -501,12 +579,86 @@ void route6set(sessionidt s, struct in6_addr ip, int prefixlen, int add)
        return;
 }
 
        return;
 }
 

-// defined in linux/ipv6.h, but tricky to include from user-space
-// TODO: move routing to use netlink rather than ioctl
-struct in6_ifreq {
-       struct in6_addr ifr6_addr;
-       __u32 ifr6_prefixlen;
-       unsigned int ifr6_ifindex;
+//
+// Set up netlink socket
+static void initnetlink(void)
+{
+       struct sockaddr_nl nladdr;
+
+       nlfd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+       if (nlfd < 0)
+       {
+               LOG(0, 0, 0, "Can't create netlink socket: %s\n", strerror(errno));
+               exit(1);
+       }
+
+       memset(&nladdr, 0, sizeof(nladdr));
+       nladdr.nl_family = AF_NETLINK;
+       nladdr.nl_pid = getpid();
+
+       if (bind(nlfd, (struct sockaddr *)&nladdr, sizeof(nladdr)) < 0)
+       {
+               LOG(0, 0, 0, "Can't bind netlink socket: %s\n", strerror(errno));
+               exit(1);
+       }
+}
+
+static ssize_t netlink_send(struct nlmsghdr *nh)
+{
+       struct sockaddr_nl nladdr;
+       struct iovec iov;
+       struct msghdr msg;
+
+       nh->nlmsg_pid = getpid();
+       nh->nlmsg_seq = ++nlseqnum;
+
+       // set kernel address
+       memset(&nladdr, 0, sizeof(nladdr));
+       nladdr.nl_family = AF_NETLINK;
+
+       iov = (struct iovec){ (void *)nh, nh->nlmsg_len };
+       msg = (struct msghdr){ (void *)&nladdr, sizeof(nladdr), &iov, 1, NULL, 0, 0 };
+
+       return sendmsg(nlfd, &msg, 0);
+}
+
+static ssize_t netlink_recv(void *buf, ssize_t len)
+{
+       struct sockaddr_nl nladdr;
+       struct iovec iov;
+       struct msghdr msg;
+
+       // set kernel address
+       memset(&nladdr, 0, sizeof(nladdr));
+       nladdr.nl_family = AF_NETLINK;
+
+       iov = (struct iovec){ buf, len };
+       msg = (struct msghdr){ (void *)&nladdr, sizeof(nladdr), &iov, 1, NULL, 0, 0 };
+
+       return recvmsg(nlfd, &msg, 0);
+}
+
+/* adapted from iproute2 */
+static void netlink_addattr(struct nlmsghdr *nh, int type, const void *data, int alen)
+{
+       int len = RTA_LENGTH(alen);
+       struct rtattr *rta;
+
+       rta = (struct rtattr *)(((void *)nh) + NLMSG_ALIGN(nh->nlmsg_len));
+       rta->rta_type = type;
+       rta->rta_len = len;
+       memcpy(RTA_DATA(rta), data, alen);
+       nh->nlmsg_len = NLMSG_ALIGN(nh->nlmsg_len) + RTA_ALIGN(len);
+}
+
+// messages corresponding to different phases seq number
+static char *tun_nl_phase_msg[] = {
+       "initialized",
+       "getting tun interface index",
+       "setting tun interface parameters",
+       "setting tun IPv4 address",
+       "setting tun LL IPv6 address",
+       "setting tun global IPv6 address",

 };
 
 //
 };
 
 //


@@ -514,8 +666,7 @@ struct in6_ifreq {
 static void inittun(void)
 {
        struct ifreq ifr;
 static void inittun(void)
 {
        struct ifreq ifr;

-       struct in6_ifreq ifr6;
-       struct sockaddr_in sin = {0};
+

        memset(&ifr, 0, sizeof(ifr));
        ifr.ifr_flags = IFF_TUN;
 
        memset(&ifr, 0, sizeof(ifr));
        ifr.ifr_flags = IFF_TUN;
 


@@ -534,75 +685,136 @@ static void inittun(void)
                LOG(0, 0, 0, "Can't set tun interface: %s\n", strerror(errno));
                exit(1);
        }
                LOG(0, 0, 0, "Can't set tun interface: %s\n", strerror(errno));
                exit(1);
        }

-       assert(strlen(ifr.ifr_name) < sizeof(config->tundevice));
-       strncpy(config->tundevice, ifr.ifr_name, sizeof(config->tundevice) - 1);
-       ifrfd = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
+       assert(strlen(ifr.ifr_name) < sizeof(config->tundevice) - 1);
+       strncpy(config->tundevice, ifr.ifr_name, sizeof(config->tundevice));

 
 

-       sin.sin_family = AF_INET;
-       sin.sin_addr.s_addr = config->bind_address ? config->bind_address : 0x01010101; // 1.1.1.1
-       memcpy(&ifr.ifr_addr, &sin, sizeof(struct sockaddr));
-
-       if (ioctl(ifrfd, SIOCSIFADDR, (void *) &ifr) < 0)
+       tunidx = if_nametoindex(config->tundevice);
+       if (tunidx == 0)

        {
        {

-               LOG(0, 0, 0, "Error setting tun address: %s\n", strerror(errno));
+               LOG(0, 0, 0, "Can't get tun interface index\n");

                exit(1);
        }
                exit(1);
        }

-       /* Bump up the qlen to deal with bursts from the network */
-       ifr.ifr_qlen = 1000;
-       if (ioctl(ifrfd, SIOCSIFTXQLEN, (void *) &ifr) < 0)
-       {
-               LOG(0, 0, 0, "Error setting tun queue length: %s\n", strerror(errno));
-               exit(1);
-       }
-       /* set MTU to modem MRU */
-       ifr.ifr_mtu = MRU;
-       if (ioctl(ifrfd, SIOCSIFMTU, (void *) &ifr) < 0)
-       {
-               LOG(0, 0, 0, "Error setting tun MTU: %s\n", strerror(errno));
-               exit(1);
-       }
-       ifr.ifr_flags = IFF_UP;
-       if (ioctl(ifrfd, SIOCSIFFLAGS, (void *) &ifr) < 0)
-       {
-               LOG(0, 0, 0, "Error setting tun flags: %s\n", strerror(errno));
-               exit(1);
-       }
-       if (ioctl(ifrfd, SIOCGIFINDEX, (void *) &ifr) < 0)
+

        {
        {

-               LOG(0, 0, 0, "Error getting tun ifindex: %s\n", strerror(errno));
-               exit(1);
-       }
-       tunidx = ifr.ifr_ifindex;
+               struct {
+                       // interface setting
+                       struct nlmsghdr nh;
+                       union {
+                               struct ifinfomsg ifinfo;
+                               struct ifaddrmsg ifaddr;
+                       } ifmsg;
+                       char rtdata[32]; // 32 should be enough
+               } req;
+               uint32_t txqlen, mtu;
+               in_addr_t ip;

 
 

-       // Only setup IPv6 on the tun device if we have a configured prefix
-       if (config->ipv6_prefix.s6_addr[0]) {
-               ifr6fd = socket(PF_INET6, SOCK_DGRAM, 0);
+               memset(&req, 0, sizeof(req));

 
 

-               // Link local address is FE80::1
-               memset(&ifr6.ifr6_addr, 0, sizeof(ifr6.ifr6_addr));
-               ifr6.ifr6_addr.s6_addr[0] = 0xFE;
-               ifr6.ifr6_addr.s6_addr[1] = 0x80;
-               ifr6.ifr6_addr.s6_addr[15] = 1;
-               ifr6.ifr6_prefixlen = 64;
-               ifr6.ifr6_ifindex = ifr.ifr_ifindex;
-               if (ioctl(ifr6fd, SIOCSIFADDR, (void *) &ifr6) < 0)
-               {
-                       LOG(0, 0, 0, "Error setting tun IPv6 link local address:"
-                               " %s\n", strerror(errno));
-               }
+               req.nh.nlmsg_type = RTM_NEWLINK;
+               req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_MULTI;
+               req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifinfo));

 
 

-               // Global address is prefix::1
-               memset(&ifr6.ifr6_addr, 0, sizeof(ifr6.ifr6_addr));
-               ifr6.ifr6_addr = config->ipv6_prefix;
-               ifr6.ifr6_addr.s6_addr[15] = 1;
-               ifr6.ifr6_prefixlen = 64;
-               ifr6.ifr6_ifindex = ifr.ifr_ifindex;
-               if (ioctl(ifr6fd, SIOCSIFADDR, (void *) &ifr6) < 0)
-               {
-                       LOG(0, 0, 0, "Error setting tun IPv6 global address: %s\n",
-                               strerror(errno));
+               req.ifmsg.ifinfo.ifi_family = AF_UNSPEC;
+               req.ifmsg.ifinfo.ifi_index = tunidx;
+               req.ifmsg.ifinfo.ifi_flags |= IFF_UP; // set interface up
+               req.ifmsg.ifinfo.ifi_change = IFF_UP; // only change this flag
+
+               /* Bump up the qlen to deal with bursts from the network */
+               txqlen = 1000;
+               netlink_addattr(&req.nh, IFLA_TXQLEN, &txqlen, sizeof(txqlen));
+               /* set MTU to modem MRU */
+               mtu = MRU;
+               netlink_addattr(&req.nh, IFLA_MTU, &mtu, sizeof(mtu));
+
+               if (netlink_send(&req.nh) < 0)
+                       goto senderror;
+
+               memset(&req, 0, sizeof(req));
+
+               req.nh.nlmsg_type = RTM_NEWADDR;
+               req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE | NLM_F_MULTI;
+               req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifaddr));
+
+               req.ifmsg.ifaddr.ifa_family = AF_INET;
+               req.ifmsg.ifaddr.ifa_prefixlen = 32;
+               req.ifmsg.ifaddr.ifa_scope = RT_SCOPE_UNIVERSE;
+               req.ifmsg.ifaddr.ifa_index = tunidx;
+
+               if (config->bind_address)
+                       ip = config->bind_address;
+               else
+                       ip = 0x01010101; // 1.1.1.1
+               netlink_addattr(&req.nh, IFA_LOCAL, &ip, sizeof(ip));
+
+               if (netlink_send(&req.nh) < 0)
+                       goto senderror;
+
+               // Only setup IPv6 on the tun device if we have a configured prefix
+               if (config->ipv6_prefix.s6_addr[0]) {
+                       struct in6_addr ip6;
+
+                       memset(&req, 0, sizeof(req));
+
+                       req.nh.nlmsg_type = RTM_NEWADDR;
+                       req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE | NLM_F_MULTI;
+                       req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifaddr));
+
+                       req.ifmsg.ifaddr.ifa_family = AF_INET6;
+                       req.ifmsg.ifaddr.ifa_prefixlen = 64;
+                       req.ifmsg.ifaddr.ifa_scope = RT_SCOPE_LINK;
+                       req.ifmsg.ifaddr.ifa_index = tunidx;
+
+                       // Link local address is FE80::1
+                       memset(&ip6, 0, sizeof(ip6));
+                       ip6.s6_addr[0] = 0xFE;
+                       ip6.s6_addr[1] = 0x80;
+                       ip6.s6_addr[15] = 1;
+                       netlink_addattr(&req.nh, IFA_LOCAL, &ip6, sizeof(ip6));
+
+                       if (netlink_send(&req.nh) < 0)
+                               goto senderror;
+
+                       memset(&req, 0, sizeof(req));
+
+                       req.nh.nlmsg_type = RTM_NEWADDR;
+                       req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE | NLM_F_MULTI;
+                       req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifaddr));
+
+                       req.ifmsg.ifaddr.ifa_family = AF_INET6;
+                       req.ifmsg.ifaddr.ifa_prefixlen = 64;
+                       req.ifmsg.ifaddr.ifa_scope = RT_SCOPE_UNIVERSE;
+                       req.ifmsg.ifaddr.ifa_index = tunidx;
+
+                       // Global address is prefix::1
+                       ip6 = config->ipv6_prefix;
+                       ip6.s6_addr[15] = 1;
+                       netlink_addattr(&req.nh, IFA_LOCAL, &ip6, sizeof(ip6));
+
+                       if (netlink_send(&req.nh) < 0)
+                               goto senderror;

                }
                }

+
+               memset(&req, 0, sizeof(req));
+
+               req.nh.nlmsg_type = NLMSG_DONE;
+               req.nh.nlmsg_len = NLMSG_LENGTH(0);
+
+               if (netlink_send(&req.nh) < 0)
+                       goto senderror;
+
+               // if we get an error for seqnum < min_initok_nlseqnum,
+               // we must exit as initialization went wrong
+               if (config->ipv6_prefix.s6_addr[0])
+                       min_initok_nlseqnum = 5 + 1; // idx + if + addr + 2*addr6
+               else
+                       min_initok_nlseqnum = 3 + 1; // idx + if + addr

        }
        }

+
+       return;
+
+senderror:
+       LOG(0, 0, 0, "Error while setting up tun device: %s\n", strerror(errno));
+       exit(1);

 }
 
 // set up UDP ports
 }
 
 // set up UDP ports


@@ -622,7 +834,7 @@ static void initudp(void)
                int flags = fcntl(udpfd, F_GETFL, 0);
                fcntl(udpfd, F_SETFL, flags | O_NONBLOCK);
        }
                int flags = fcntl(udpfd, F_GETFL, 0);
                fcntl(udpfd, F_SETFL, flags | O_NONBLOCK);
        }

-       if (bind(udpfd, (void *) &addr, sizeof(addr)) < 0)
+       if (bind(udpfd, (struct sockaddr *) &addr, sizeof(addr)) < 0)

        {
                LOG(0, 0, 0, "Error in UDP bind: %s\n", strerror(errno));
                exit(1);
        {
                LOG(0, 0, 0, "Error in UDP bind: %s\n", strerror(errno));
                exit(1);


@@ -635,7 +847,7 @@ static void initudp(void)
        controlfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
        setsockopt(controlfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
        setsockopt(controlfd, SOL_IP, IP_PKTINFO, &on, sizeof(on)); // recvfromto
        controlfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
        setsockopt(controlfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
        setsockopt(controlfd, SOL_IP, IP_PKTINFO, &on, sizeof(on)); // recvfromto

-       if (bind(controlfd, (void *) &addr, sizeof(addr)) < 0)
+       if (bind(controlfd, (struct sockaddr *) &addr, sizeof(addr)) < 0)

        {
                LOG(0, 0, 0, "Error in control bind: %s\n", strerror(errno));
                exit(1);
        {
                LOG(0, 0, 0, "Error in control bind: %s\n", strerror(errno));
                exit(1);


@@ -648,7 +860,7 @@ static void initudp(void)
        daefd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
        setsockopt(daefd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
        setsockopt(daefd, SOL_IP, IP_PKTINFO, &on, sizeof(on)); // recvfromto
        daefd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
        setsockopt(daefd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
        setsockopt(daefd, SOL_IP, IP_PKTINFO, &on, sizeof(on)); // recvfromto

-       if (bind(daefd, (void *) &addr, sizeof(addr)) < 0)
+       if (bind(daefd, (struct sockaddr *) &addr, sizeof(addr)) < 0)

        {
                LOG(0, 0, 0, "Error in DAE bind: %s\n", strerror(errno));
                exit(1);
        {
                LOG(0, 0, 0, "Error in DAE bind: %s\n", strerror(errno));
                exit(1);


@@ -673,19 +885,19 @@ static void initudp(void)
 // IP address.
 //
 
 // IP address.
 //
 

-static int lookup_ipmap(in_addr_t ip)
+static sessionidt lookup_ipmap(in_addr_t ip)

 {
        uint8_t *a = (uint8_t *) &ip;
 {
        uint8_t *a = (uint8_t *) &ip;

-       uint8_t **d = (uint8_t **) ip_hash;
+       union iphash *h = ip_hash;

 
 

-       if (!(d = (uint8_t **) d[(size_t) *a++])) return 0;
-       if (!(d = (uint8_t **) d[(size_t) *a++])) return 0;
-       if (!(d = (uint8_t **) d[(size_t) *a++])) return 0;
+       if (!(h = h[*a++].idx)) return 0;
+       if (!(h = h[*a++].idx)) return 0;
+       if (!(h = h[*a++].idx)) return 0;

 
 

-       return (int) (intptr_t) d[(size_t) *a];
+       return h[*a].sess;

 }
 
 }
 

-static int lookup_ipv6map(struct in6_addr ip)
+static sessionidt lookup_ipv6map(struct in6_addr ip)

 {
        struct ipv6radix *curnode;
        int i;
 {
        struct ipv6radix *curnode;
        int i;


@@ -713,18 +925,18 @@ static int lookup_ipv6map(struct in6_addr ip)
 
 sessionidt sessionbyip(in_addr_t ip)
 {
 
 sessionidt sessionbyip(in_addr_t ip)
 {

-       int s = lookup_ipmap(ip);
+       sessionidt s = lookup_ipmap(ip);

        CSTAT(sessionbyip);
 
        if (s > 0 && s < MAXSESSION && session[s].opened)
        CSTAT(sessionbyip);
 
        if (s > 0 && s < MAXSESSION && session[s].opened)

-               return (sessionidt) s;
+               return s;

 
        return 0;
 }
 
 sessionidt sessionbyipv6(struct in6_addr ip)
 {
 
        return 0;
 }
 
 sessionidt sessionbyipv6(struct in6_addr ip)
 {

-       int s;
+       sessionidt s;

        CSTAT(sessionbyipv6);
 
        if (!memcmp(&config->ipv6_prefix, &ip, 8) ||
        CSTAT(sessionbyipv6);
 
        if (!memcmp(&config->ipv6_prefix, &ip, 8) ||


@@ -750,25 +962,22 @@ sessionidt sessionbyipv6(struct in6_addr ip)
 //
 // (It's actually cached in network order)
 //
 //
 // (It's actually cached in network order)
 //

-static void cache_ipmap(in_addr_t ip, int s)
+static void cache_ipmap(in_addr_t ip, sessionidt s)

 {
        in_addr_t nip = htonl(ip);      // MUST be in network order. I.e. MSB must in be ((char *) (&ip))[0]
        uint8_t *a = (uint8_t *) &nip;
 {
        in_addr_t nip = htonl(ip);      // MUST be in network order. I.e. MSB must in be ((char *) (&ip))[0]
        uint8_t *a = (uint8_t *) &nip;

-       uint8_t **d = (uint8_t **) ip_hash;
+       union iphash *h = ip_hash;

        int i;
 
        for (i = 0; i < 3; i++)
        {
        int i;
 
        for (i = 0; i < 3; i++)
        {

-               if (!d[(size_t) a[i]])
-               {
-                       if (!(d[(size_t) a[i]] = calloc(256, sizeof(void *))))
-                               return;
-               }
+               if (!(h[a[i]].idx || (h[a[i]].idx = calloc(256, sizeof(union iphash)))))
+                       return;

 
 

-               d = (uint8_t **) d[(size_t) a[i]];
+               h = h[a[i]].idx;

        }
 
        }
 

-       d[(size_t) a[3]] = (uint8_t *) (intptr_t) s;
+       h[a[3]].sess = s;

 
        if (s > 0)
                LOG(4, s, session[s].tunnel, "Caching ip address %s\n", fmtaddr(nip, 0));
 
        if (s > 0)
                LOG(4, s, session[s].tunnel, "Caching ip address %s\n", fmtaddr(nip, 0));


@@ -783,7 +992,7 @@ static void uncache_ipmap(in_addr_t ip)
        cache_ipmap(ip, 0);     // Assign it to the NULL session.
 }
 
        cache_ipmap(ip, 0);     // Assign it to the NULL session.
 }
 

-static void cache_ipv6map(struct in6_addr ip, int prefixlen, int s)
+static void cache_ipv6map(struct in6_addr ip, int prefixlen, sessionidt s)

 {
        int i;
        int bytes;
 {
        int i;
        int bytes;


@@ -824,7 +1033,7 @@ static void cache_ipv6map(struct in6_addr ip, int prefixlen, int s)
 //
 int cmd_show_ipcache(struct cli_def *cli, char *command, char **argv, int argc)
 {
 //
 int cmd_show_ipcache(struct cli_def *cli, char *command, char **argv, int argc)
 {

-       char **d = (char **) ip_hash, **e, **f, **g;
+       union iphash *d = ip_hash, *e, *f, *g;

        int i, j, k, l;
        int count = 0;
 
        int i, j, k, l;
        int count = 0;
 


@@ -835,24 +1044,28 @@ int cmd_show_ipcache(struct cli_def *cli, char *command, char **argv, int argc)
 
        for (i = 0; i < 256; ++i)
        {
 
        for (i = 0; i < 256; ++i)
        {

-               if (!d[i])
+               if (!d[i].idx)

                        continue;
                        continue;

-               e = (char **) d[i];
+
+               e = d[i].idx;

                for (j = 0; j < 256; ++j)
                {
                for (j = 0; j < 256; ++j)
                {

-                       if (!e[j])
+                       if (!e[j].idx)

                                continue;
                                continue;

-                       f = (char **) e[j];
+
+                       f = e[j].idx;

                        for (k = 0; k < 256; ++k)
                        {
                        for (k = 0; k < 256; ++k)
                        {

-                               if (!f[k])
+                               if (!f[k].idx)

                                        continue;
                                        continue;

-                               g = (char **)f[k];
+
+                               g = f[k].idx;

                                for (l = 0; l < 256; ++l)
                                {
                                for (l = 0; l < 256; ++l)
                                {

-                                       if (!g[l])
+                                       if (!g[l].sess)

                                                continue;
                                                continue;

-                                       cli_print(cli, "%7d %d.%d.%d.%d", (int) (intptr_t) g[l], i, j, k, l);
+
+                                       cli_print(cli, "%7d %d.%d.%d.%d", g[l].sess, i, j, k, l);

                                        ++count;
                                }
                        }
                                        ++count;
                                }
                        }


@@ -1051,9 +1264,78 @@ void adjust_tcp_mss(sessionidt s, tunnelidt t, uint8_t *buf, int len, uint8_t *t
        *(uint16_t *) (tcp + 16) = htons(sum + (sum >> 16));
 }
 
        *(uint16_t *) (tcp + 16) = htons(sum + (sum >> 16));
 }
 

+void processmpframe(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l, uint8_t extra)
+{
+       uint16_t proto;
+       if (extra) {
+               // Skip the four extra bytes
+               p += 4;
+               l -= 4;
+       }
+
+        if (*p & 1)
+        {
+                proto = *p++;
+                l--;
+        }
+        else
+        {
+                proto = ntohs(*(uint16_t *) p);
+                p += 2;
+                l -= 2;
+        }
+        if (proto == PPPIP)
+        {
+                if (session[s].die)
+                {
+                        LOG(4, s, t, "MPPP: Session %d is closing.  Don't process PPP packets\n", s);
+                        return;              // closing session, PPP not processed
+                }
+                session[s].last_packet = session[s].last_data = time_now;
+                processipin(s, t, p, l);
+        }
+        else if (proto == PPPIPV6 && config->ipv6_prefix.s6_addr[0])
+        {
+                if (session[s].die)
+                {
+                        LOG(4, s, t, "MPPP: Session %d is closing.  Don't process PPP packets\n", s);
+                        return;              // closing session, PPP not processed
+                }
+
+                session[s].last_packet = session[s].last_data = time_now;
+                processipv6in(s, t, p, l);
+        }
+       else if (proto == PPPIPCP)
+        {
+                session[s].last_packet = session[s].last_data = time_now;
+                processipcp(s, t, p, l);
+        }
+        else if (proto == PPPCCP)
+        {
+                session[s].last_packet = session[s].last_data = time_now;
+                processccp(s, t, p, l);
+        }
+        else
+        {
+                LOG(2, s, t, "MPPP: Unsupported MP protocol 0x%04X received\n",proto);
+        }
+}
+
+static void update_session_out_stat(sessionidt s, sessiont *sp, int len)
+{
+       increment_counter(&sp->cout, &sp->cout_wrap, len); // byte count
+       sp->cout_delta += len;
+       sp->pout++;
+       sp->last_data = time_now;
+
+       sess_local[s].cout += len;      // To send to master..
+       sess_local[s].pout++;
+}
+

 // process outgoing (to tunnel) IP
 //
 // process outgoing (to tunnel) IP
 //

-static void processipout(uint8_t *buf, int len)
+// (i.e. this routine writes to data[-8]).
+void processipout(uint8_t *buf, int len)

 {
        sessionidt s;
        sessiont *sp;
 {
        sessionidt s;
        sessiont *sp;


@@ -1063,7 +1345,7 @@ static void processipout(uint8_t *buf, int len)
        uint8_t *data = buf;    // Keep a copy of the originals.
        int size = len;
 
        uint8_t *data = buf;    // Keep a copy of the originals.
        int size = len;
 

-       uint8_t b[MAXETHER + 20];
+       uint8_t fragbuf[MAXETHER + 20];

 
        CSTAT(processipout);
 
 
        CSTAT(processipout);
 


@@ -1112,7 +1394,14 @@ static void processipout(uint8_t *buf, int len)
                }
                return;
        }
                }
                return;
        }

+

        t = session[s].tunnel;
        t = session[s].tunnel;

+       if (len > session[s].mru || (session[s].mrru && len > session[s].mrru))
+       {
+               LOG(3, s, t, "Packet size more than session MRU\n");
+               return;
+       }
+

        sp = &session[s];
 
        // DoS prevention: enforce a maximum number of packets per 0.1s for a session
        sp = &session[s];
 
        // DoS prevention: enforce a maximum number of packets per 0.1s for a session


@@ -1183,26 +1472,129 @@ static void processipout(uint8_t *buf, int len)
                return;
        }
 
                return;
        }
 

-       LOG(5, s, t, "Ethernet -> Tunnel (%d bytes)\n", len);
+       if(session[s].bundle != 0 && bundle[session[s].bundle].num_of_links > 1)
+       {

 
 

-       // Add on L2TP header
+               if (!config->cluster_iam_master)
+               {
+                       // The MPPP packets must be managed by the Master.
+                       master_forward_mppp_packet(s, data, size);
+                       return;
+               }
+
+               // Add on L2TP header
+               sessionidt members[MAXBUNDLESES];
+               bundleidt bid = session[s].bundle;
+               bundlet *b = &bundle[bid];
+               uint32_t num_of_links, nb_opened;
+               int i;
+
+               num_of_links = b->num_of_links;
+               nb_opened = 0;
+               for (i = 0;i < num_of_links;i++)
+               {
+                       s = b->members[i];
+                       if (session[s].ppp.lcp == Opened)
+                       {
+                               members[nb_opened] = s;
+                               nb_opened++;
+                       }
+               }
+
+               if (nb_opened < 1)
+               {
+                       LOG(3, s, t, "MPPP: PROCESSIPOUT ERROR, no session opened in bundle:%d\n", bid);
+                       return;
+               }
+
+               num_of_links = nb_opened;
+               b->current_ses = (b->current_ses + 1) % num_of_links;
+               s = members[b->current_ses];
+               t = session[s].tunnel;
+               sp = &session[s];
+               LOG(4, s, t, "MPPP: (1)Session number becomes: %d\n", s);
+
+               if (num_of_links > 1)
+               {
+                       if(len > MINFRAGLEN)
+                       {
+                               //for rotate traffic among the member links
+                               uint32_t divisor = num_of_links;
+                               if (divisor > 2)
+                                       divisor = divisor/2 + (divisor & 1);
+
+                               // Partition the packet to "num_of_links" fragments
+                               uint32_t fraglen = len / divisor;
+                               uint32_t last_fraglen = fraglen + len % divisor;
+                               uint32_t remain = len;
+
+                               // send the first packet
+                               uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, fraglen, s, t, PPPIP, 0, bid, MP_BEGIN);
+                               if (!p) return;
+                               tunnelsend(fragbuf, fraglen + (p-fragbuf), t); // send it...
+
+                               // statistics
+                               update_session_out_stat(s, sp, fraglen);
+
+                               remain -= fraglen;
+                               while (remain > last_fraglen)
+                               {
+                                       b->current_ses = (b->current_ses + 1) % num_of_links;
+                                       s = members[b->current_ses];
+                                       t = session[s].tunnel;
+                                       sp = &session[s];
+                                       LOG(4, s, t, "MPPP: (2)Session number becomes: %d\n", s);
+                                       p = makeppp(fragbuf, sizeof(fragbuf), buf+(len - remain), fraglen, s, t, PPPIP, 0, bid, 0);
+                                       if (!p) return;
+                                       tunnelsend(fragbuf, fraglen + (p-fragbuf), t); // send it...
+                                       update_session_out_stat(s, sp, fraglen);
+                                       remain -= fraglen;
+                               }
+                               // send the last fragment
+                               b->current_ses = (b->current_ses + 1) % num_of_links;
+                               s = members[b->current_ses];
+                               t = session[s].tunnel;
+                               sp = &session[s];
+                               LOG(4, s, t, "MPPP: (2)Session number becomes: %d\n", s);
+                               p = makeppp(fragbuf, sizeof(fragbuf), buf+(len - remain), remain, s, t, PPPIP, 0, bid, MP_END);
+                               if (!p) return;
+                               tunnelsend(fragbuf, remain + (p-fragbuf), t); // send it...
+                               update_session_out_stat(s, sp, remain);
+                               if (remain != last_fraglen)
+                                       LOG(3, s, t, "PROCESSIPOUT ERROR REMAIN != LAST_FRAGLEN, %d != %d\n", remain, last_fraglen);
+                       }
+                       else
+                       {
+                               // Send it as one frame
+                               uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, len, s, t, PPPIP, 0, bid, MP_BOTH_BITS);
+                               if (!p) return;
+                               tunnelsend(fragbuf, len + (p-fragbuf), t); // send it...
+                               LOG(4, s, t, "MPPP: packet sent as one frame\n");
+                               update_session_out_stat(s, sp, len);
+                       }
+               }
+               else
+               {
+                       // Send it as one frame (NO MPPP Frame)
+                       uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, len, s, t, PPPIP, 0, 0, 0);
+                       if (!p) return;
+                       tunnelsend(fragbuf, len + (p-fragbuf), t); // send it...
+                       update_session_out_stat(s, sp, len);
+               }
+       }
+       else

        {
        {

-               uint8_t *p = makeppp(b, sizeof(b), buf, len, s, t, PPPIP);
+               uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, len, s, t, PPPIP, 0, 0, 0);

                if (!p) return;
                if (!p) return;

-               tunnelsend(b, len + (p-b), t); // send it...
+               tunnelsend(fragbuf, len + (p-fragbuf), t); // send it...
+               update_session_out_stat(s, sp, len);

        }
 
        // Snooping this session, send it to intercept box
        if (sp->snoop_ip && sp->snoop_port)
                snoop_send_packet(buf, len, sp->snoop_ip, sp->snoop_port);
 
        }
 
        // Snooping this session, send it to intercept box
        if (sp->snoop_ip && sp->snoop_port)
                snoop_send_packet(buf, len, sp->snoop_ip, sp->snoop_port);
 

-       increment_counter(&sp->cout, &sp->cout_wrap, len); // byte count
-       sp->cout_delta += len;
-       sp->pout++;

        udp_tx += len;
        udp_tx += len;

-
-       sess_local[s].cout += len;      // To send to master..
-       sess_local[s].pout++;

 }
 
 // process outgoing (to tunnel) IPv6
 }
 
 // process outgoing (to tunnel) IPv6


@@ -1273,8 +1665,18 @@ static void processipv6out(uint8_t * buf, int len)
                }
                return;
        }
                }
                return;
        }

+       if (session[s].bundle && bundle[session[s].bundle].num_of_links > 1)
+       {
+               bundleidt bid = session[s].bundle;
+               bundlet *b = &bundle[bid];
+
+               b->current_ses = (b->current_ses + 1) % b->num_of_links;
+               s = b->members[b->current_ses];
+               LOG(3, s, session[s].tunnel, "MPPP: Session number becomes: %u\n", s);
+       }

        t = session[s].tunnel;
        sp = &session[s];
        t = session[s].tunnel;
        sp = &session[s];

+       sp->last_data = time_now;

 
        // FIXME: add DoS prevention/filters?
 
 
        // FIXME: add DoS prevention/filters?
 


@@ -1298,7 +1700,7 @@ static void processipv6out(uint8_t * buf, int len)
 
        // Add on L2TP header
        {
 
        // Add on L2TP header
        {

-               uint8_t *p = makeppp(b, sizeof(b), buf, len, s, t, PPPIPV6);
+               uint8_t *p = makeppp(b, sizeof(b), buf, len, s, t, PPPIPV6, 0, 0, 0);

                if (!p) return;
                tunnelsend(b, len + (p-b), t); // send it...
        }
                if (!p) return;
                tunnelsend(b, len + (p-b), t); // send it...
        }


@@ -1324,7 +1726,6 @@ static void send_ipout(sessionidt s, uint8_t *buf, int len)
 {
        sessiont *sp;
        tunnelidt t;
 {
        sessiont *sp;
        tunnelidt t;

-       in_addr_t ip;

 
        uint8_t b[MAXETHER + 20];
 
 
        uint8_t b[MAXETHER + 20];
 


@@ -1338,8 +1739,6 @@ static void send_ipout(sessionidt s, uint8_t *buf, int len)
        buf += 4;
        len -= 4;
 
        buf += 4;
        len -= 4;
 

-       ip = *(in_addr_t *)(buf + 16);
-

        if (!session[s].ip)
                return;
 
        if (!session[s].ip)
                return;
 


@@ -1350,7 +1749,7 @@ static void send_ipout(sessionidt s, uint8_t *buf, int len)
 
        // Add on L2TP header
        {
 
        // Add on L2TP header
        {

-               uint8_t *p = makeppp(b, sizeof(b), buf, len, s, t, PPPIP);
+               uint8_t *p = makeppp(b, sizeof(b), buf, len, s, t, PPPIP, 0, 0, 0);

                if (!p) return;
                tunnelsend(b, len + (p-b), t); // send it...
        }
                if (!p) return;
                tunnelsend(b, len + (p-b), t); // send it...
        }


@@ -1372,10 +1771,10 @@ static void send_ipout(sessionidt s, uint8_t *buf, int len)
 static void control16(controlt * c, uint16_t avp, uint16_t val, uint8_t m)
 {
        uint16_t l = (m ? 0x8008 : 0x0008);
 static void control16(controlt * c, uint16_t avp, uint16_t val, uint8_t m)
 {
        uint16_t l = (m ? 0x8008 : 0x0008);

-       *(uint16_t *) (c->buf + c->length + 0) = htons(l);
-       *(uint16_t *) (c->buf + c->length + 2) = htons(0);
-       *(uint16_t *) (c->buf + c->length + 4) = htons(avp);
-       *(uint16_t *) (c->buf + c->length + 6) = htons(val);
+       c->buf16[c->length/2 + 0] = htons(l);
+       c->buf16[c->length/2 + 1] = htons(0);
+       c->buf16[c->length/2 + 2] = htons(avp);
+       c->buf16[c->length/2 + 3] = htons(val);

        c->length += 8;
 }
 
        c->length += 8;
 }
 


@@ -1383,10 +1782,10 @@ static void control16(controlt * c, uint16_t avp, uint16_t val, uint8_t m)
 static void control32(controlt * c, uint16_t avp, uint32_t val, uint8_t m)
 {
        uint16_t l = (m ? 0x800A : 0x000A);
 static void control32(controlt * c, uint16_t avp, uint32_t val, uint8_t m)
 {
        uint16_t l = (m ? 0x800A : 0x000A);

-       *(uint16_t *) (c->buf + c->length + 0) = htons(l);
-       *(uint16_t *) (c->buf + c->length + 2) = htons(0);
-       *(uint16_t *) (c->buf + c->length + 4) = htons(avp);
-       *(uint32_t *) (c->buf + c->length + 6) = htonl(val);
+       c->buf16[c->length/2 + 0] = htons(l);
+       c->buf16[c->length/2 + 1] = htons(0);
+       c->buf16[c->length/2 + 2] = htons(avp);
+       *(uint32_t *) &c->buf[c->length + 6] = htonl(val);

        c->length += 10;
 }
 
        c->length += 10;
 }
 


@@ -1394,10 +1793,10 @@ static void control32(controlt * c, uint16_t avp, uint32_t val, uint8_t m)
 static void controls(controlt * c, uint16_t avp, char *val, uint8_t m)
 {
        uint16_t l = ((m ? 0x8000 : 0) + strlen(val) + 6);
 static void controls(controlt * c, uint16_t avp, char *val, uint8_t m)
 {
        uint16_t l = ((m ? 0x8000 : 0) + strlen(val) + 6);

-       *(uint16_t *) (c->buf + c->length + 0) = htons(l);
-       *(uint16_t *) (c->buf + c->length + 2) = htons(0);
-       *(uint16_t *) (c->buf + c->length + 4) = htons(avp);
-       memcpy(c->buf + c->length + 6, val, strlen(val));
+       c->buf16[c->length/2 + 0] = htons(l);
+       c->buf16[c->length/2 + 1] = htons(0);
+       c->buf16[c->length/2 + 2] = htons(avp);
+       memcpy(&c->buf[c->length + 6], val, strlen(val));

        c->length += 6 + strlen(val);
 }
 
        c->length += 6 + strlen(val);
 }
 


@@ -1405,10 +1804,10 @@ static void controls(controlt * c, uint16_t avp, char *val, uint8_t m)
 static void controlb(controlt * c, uint16_t avp, uint8_t *val, unsigned int len, uint8_t m)
 {
        uint16_t l = ((m ? 0x8000 : 0) + len + 6);
 static void controlb(controlt * c, uint16_t avp, uint8_t *val, unsigned int len, uint8_t m)
 {
        uint16_t l = ((m ? 0x8000 : 0) + len + 6);

-       *(uint16_t *) (c->buf + c->length + 0) = htons(l);
-       *(uint16_t *) (c->buf + c->length + 2) = htons(0);
-       *(uint16_t *) (c->buf + c->length + 4) = htons(avp);
-       memcpy(c->buf + c->length + 6, val, len);
+       c->buf16[c->length/2 + 0] = htons(l);
+       c->buf16[c->length/2 + 1] = htons(0);
+       c->buf16[c->length/2 + 2] = htons(avp);
+       memcpy(&c->buf[c->length + 6], val, len);

        c->length += 6 + len;
 }
 
        c->length += 6 + len;
 }
 


@@ -1425,7 +1824,7 @@ static controlt *controlnew(uint16_t mtype)
        }
        assert(c);
        c->next = 0;
        }
        assert(c);
        c->next = 0;

-       *(uint16_t *) (c->buf + 0) = htons(0xC802); // flags/ver
+       c->buf16[0] = htons(0xC802); // flags/ver

        c->length = 12;
        control16(c, 0, mtype, 1);
        return c;
        c->length = 12;
        control16(c, 0, mtype, 1);
        return c;


@@ -1435,26 +1834,26 @@ static controlt *controlnew(uint16_t mtype)
 // (ZLB send).
 static void controlnull(tunnelidt t)
 {
 // (ZLB send).
 static void controlnull(tunnelidt t)
 {

-       uint8_t buf[12];
+       uint16_t buf[6];

        if (tunnel[t].controlc) // Messages queued; They will carry the ack.
                return;
 
        if (tunnel[t].controlc) // Messages queued; They will carry the ack.
                return;
 

-       *(uint16_t *) (buf + 0) = htons(0xC802); // flags/ver
-       *(uint16_t *) (buf + 2) = htons(12); // length
-       *(uint16_t *) (buf + 4) = htons(tunnel[t].far); // tunnel
-       *(uint16_t *) (buf + 6) = htons(0); // session
-       *(uint16_t *) (buf + 8) = htons(tunnel[t].ns); // sequence
-       *(uint16_t *) (buf + 10) = htons(tunnel[t].nr); // sequence
-       tunnelsend(buf, 12, t);
+       buf[0] = htons(0xC802); // flags/ver
+       buf[1] = htons(12); // length
+       buf[2] = htons(tunnel[t].far); // tunnel
+       buf[3] = htons(0); // session
+       buf[4] = htons(tunnel[t].ns); // sequence
+       buf[5] = htons(tunnel[t].nr); // sequence
+       tunnelsend((uint8_t *)buf, 12, t);

 }
 
 // add a control message to a tunnel, and send if within window
 static void controladd(controlt *c, sessionidt far, tunnelidt t)
 {
 }
 
 // add a control message to a tunnel, and send if within window
 static void controladd(controlt *c, sessionidt far, tunnelidt t)
 {

-       *(uint16_t *) (c->buf + 2) = htons(c->length); // length
-       *(uint16_t *) (c->buf + 4) = htons(tunnel[t].far); // tunnel
-       *(uint16_t *) (c->buf + 6) = htons(far); // session
-       *(uint16_t *) (c->buf + 8) = htons(tunnel[t].ns); // sequence
+       c->buf16[1] = htons(c->length); // length
+       c->buf16[2] = htons(tunnel[t].far); // tunnel
+       c->buf16[3] = htons(far); // session
+       c->buf16[4] = htons(tunnel[t].ns); // sequence

        tunnel[t].ns++;              // advance sequence
        // link in message in to queue
        if (tunnel[t].controlc)
        tunnel[t].ns++;              // advance sequence
        // link in message in to queue
        if (tunnel[t].controlc)


@@ -1562,7 +1961,9 @@ void filter_session(sessionidt s, int filter_in, int filter_out)
 void sessionshutdown(sessionidt s, char const *reason, int cdn_result, int cdn_error, int term_cause)
 {
        int walled_garden = session[s].walled_garden;
 void sessionshutdown(sessionidt s, char const *reason, int cdn_result, int cdn_error, int term_cause)
 {
        int walled_garden = session[s].walled_garden;

-
+       bundleidt b = session[s].bundle;
+       //delete routes only for last session in bundle (in case of MPPP)
+       int del_routes = !b || (bundle[b].num_of_links == 1);

 
        CSTAT(sessionshutdown);
 
 
        CSTAT(sessionshutdown);
 


@@ -1575,8 +1976,9 @@ void sessionshutdown(sessionidt s, char const *reason, int cdn_result, int cdn_e
        if (!session[s].die)
        {
                struct param_kill_session data = { &tunnel[session[s].tunnel], &session[s] };
        if (!session[s].die)
        {
                struct param_kill_session data = { &tunnel[session[s].tunnel], &session[s] };

-               LOG(2, s, session[s].tunnel, "Shutting down session %d: %s\n", s, reason);
+               LOG(2, s, session[s].tunnel, "Shutting down session %u: %s\n", s, reason);

                run_plugins(PLUGIN_KILL_SESSION, &data);
                run_plugins(PLUGIN_KILL_SESSION, &data);

+               session[s].die = TIME + 150; // Clean up in 15 seconds

        }
 
        if (session[s].ip && !walled_garden && !session[s].die)
        }
 
        if (session[s].ip && !walled_garden && !session[s].die)


@@ -1607,25 +2009,87 @@ void sessionshutdown(sessionidt s, char const *reason, int cdn_result, int cdn_e
                int routed = 0;
                for (r = 0; r < MAXROUTE && session[s].route[r].ip; r++)
                {
                int routed = 0;
                for (r = 0; r < MAXROUTE && session[s].route[r].ip; r++)
                {

-                       if ((session[s].ip & session[s].route[r].mask) ==
-                           (session[s].route[r].ip & session[s].route[r].mask))
+                       if ((session[s].ip >> (32-session[s].route[r].prefixlen)) ==
+                           (session[s].route[r].ip >> (32-session[s].route[r].prefixlen)))

                                routed++;
 
                                routed++;
 

-                       routeset(s, session[s].route[r].ip, session[s].route[r].mask, 0, 0);
+                       if (del_routes) routeset(s, session[s].route[r].ip, session[s].route[r].prefixlen, 0, 0);

                        session[s].route[r].ip = 0;
                }
 
                if (session[s].ip_pool_index == -1) // static ip
                {
                        session[s].route[r].ip = 0;
                }
 
                if (session[s].ip_pool_index == -1) // static ip
                {

-                       if (!routed) routeset(s, session[s].ip, 0, 0, 0);
+                       if (!routed && del_routes) routeset(s, session[s].ip, 0, 0, 0);

                        session[s].ip = 0;
                }
                else
                        free_ip_address(s);
 
                // unroute IPv6, if setup
                        session[s].ip = 0;
                }
                else
                        free_ip_address(s);
 
                // unroute IPv6, if setup

-               if (session[s].ppp.ipv6cp == Opened && session[s].ipv6prefixlen)
+               if (session[s].ppp.ipv6cp == Opened && session[s].ipv6prefixlen && del_routes)

                        route6set(s, session[s].ipv6route, session[s].ipv6prefixlen, 0);
                        route6set(s, session[s].ipv6route, session[s].ipv6prefixlen, 0);

+               
+               if (b)
+               {
+                       // This session was part of a bundle
+                       bundle[b].num_of_links--;
+                       LOG(3, s, session[s].tunnel, "MPPP: Dropping member link: %d from bundle %d\n",s,b);
+                       if(bundle[b].num_of_links == 0)
+                       {
+                               bundleclear(b);
+                               LOG(3, s, session[s].tunnel, "MPPP: Kill bundle: %d (No remaing member links)\n",b);
+                       }
+                       else 
+                       {
+                               // Adjust the members array to accomodate the new change
+                               uint8_t mem_num = 0;
+                               // It should be here num_of_links instead of num_of_links-1 (previous instruction "num_of_links--")
+                               if(bundle[b].members[bundle[b].num_of_links] != s)
+                               {
+                                       uint8_t ml;
+                                       for(ml = 0; ml<bundle[b].num_of_links; ml++)
+                                       if(bundle[b].members[ml] == s)
+                                       {
+                                                       mem_num = ml;
+                                                       break;
+                                       }
+                                       bundle[b].members[mem_num] = bundle[b].members[bundle[b].num_of_links];
+                                       LOG(3, s, session[s].tunnel, "MPPP: Adjusted member links array\n");
+
+                                       // If the killed session is the first of the bundle,
+                                       // the new first session must be stored in the cache_ipmap
+                                       // else the function sessionbyip return 0 and the sending not work any more (processipout).
+                                       if (mem_num == 0)
+                                       {
+                                               sessionidt new_s = bundle[b].members[0];
+
+                                               routed = 0;
+                                               // Add the route for this session.
+                                               for (r = 0; r < MAXROUTE && session[new_s].route[r].ip; r++)
+                                               {
+                                                       int i, prefixlen;
+                                                       in_addr_t ip;
+
+                                                       prefixlen = session[new_s].route[r].prefixlen;
+                                                       ip = session[new_s].route[r].ip;
+
+                                                       if (!prefixlen) prefixlen = 32;
+                                                       ip &= 0xffffffff << (32 - prefixlen);   // Force the ip to be the first one in the route.
+
+                                                       for (i = ip; i < ip+(1<<(32-prefixlen)) ; ++i)
+                                                               cache_ipmap(i, new_s);
+                                               }
+                                               cache_ipmap(session[new_s].ip, new_s);
+
+                                               // IPV6 route
+                                               if (session[new_s].ipv6prefixlen)
+                                                       cache_ipv6map(session[new_s].ipv6route, session[new_s].ipv6prefixlen, new_s);
+                                       }
+                               }
+                       }
+
+                       cluster_send_bundle(b);
+        }

        }
 
        if (session[s].throttle_in || session[s].throttle_out) // Unthrottle if throttled.
        }
 
        if (session[s].throttle_in || session[s].throttle_out) // Unthrottle if throttled.


@@ -1636,10 +2100,10 @@ void sessionshutdown(sessionidt s, char const *reason, int cdn_result, int cdn_e
                controlt *c = controlnew(14); // sending CDN
                if (cdn_error)
                {
                controlt *c = controlnew(14); // sending CDN
                if (cdn_error)
                {

-                       uint8_t buf[4];
-                       *(uint16_t *) buf     = htons(cdn_result);
-                       *(uint16_t *) (buf+2) = htons(cdn_error);
-                       controlb(c, 1, buf, 4, 1);
+                       uint16_t buf[2];
+                       buf[0] = htons(cdn_result);
+                       buf[1] = htons(cdn_error);
+                       controlb(c, 1, (uint8_t *)buf, 4, 1);

                }
                else
                        control16(c, 1, cdn_result, 1);
                }
                else
                        control16(c, 1, cdn_result, 1);


@@ -1648,9 +2112,6 @@ void sessionshutdown(sessionidt s, char const *reason, int cdn_result, int cdn_e
                controladd(c, session[s].far, session[s].tunnel); // send the message
        }
 
                controladd(c, session[s].far, session[s].tunnel); // send the message
        }
 

-       if (!session[s].die)
-               session[s].die = TIME + 150; // Clean up in 15 seconds
-

        // update filter refcounts
        if (session[s].filter_in) ip_filters[session[s].filter_in - 1].used--;
        if (session[s].filter_out) ip_filters[session[s].filter_out - 1].used--;
        // update filter refcounts
        if (session[s].filter_in) ip_filters[session[s].filter_in - 1].used--;
        if (session[s].filter_out) ip_filters[session[s].filter_out - 1].used--;


@@ -1679,7 +2140,7 @@ void sendipcp(sessionidt s, tunnelidt t)
                session[s].unique_id = last_id;
        }
 
                session[s].unique_id = last_id;
        }
 

-       q = makeppp(buf, sizeof(buf), 0, 0, s, t, PPPIPCP);
+       q = makeppp(buf, sizeof(buf), 0, 0, s, t, PPPIPCP, 0, 0, 0);

        if (!q) return;
 
        *q = ConfigReq;
        if (!q) return;
 
        *q = ConfigReq;


@@ -1703,7 +2164,7 @@ void sendipv6cp(sessionidt s, tunnelidt t)
        CSTAT(sendipv6cp);
        LOG(3, s, t, "IPV6CP: send ConfigReq\n");
 
        CSTAT(sendipv6cp);
        LOG(3, s, t, "IPV6CP: send ConfigReq\n");
 

-       q = makeppp(buf, sizeof(buf), 0, 0, s, t, PPPIPV6CP);
+       q = makeppp(buf, sizeof(buf), 0, 0, s, t, PPPIPV6CP, 0, 0, 0);

        if (!q) return;
 
        *q = ConfigReq;
        if (!q) return;
 
        *q = ConfigReq;


@@ -1735,7 +2196,6 @@ static void sessionclear(sessionidt s)
 // kill a session now
 void sessionkill(sessionidt s, char *reason)
 {
 // kill a session now
 void sessionkill(sessionidt s, char *reason)
 {

-

        CSTAT(sessionkill);
 
        if (!session[s].opened) // not alive
        CSTAT(sessionkill);
 
        if (!session[s].opened) // not alive


@@ -1743,12 +2203,13 @@ void sessionkill(sessionidt s, char *reason)
 
        if (session[s].next)
        {
 
        if (session[s].next)
        {

-               LOG(0, s, session[s].tunnel, "Tried to kill a session with next pointer set (%d)\n", session[s].next);
+               LOG(0, s, session[s].tunnel, "Tried to kill a session with next pointer set (%u)\n", session[s].next);

                return;
        }
 
                return;
        }
 

-       session[s].die = TIME;
-       sessionshutdown(s, reason, CDN_ADMIN_DISC, TERM_ADMIN_RESET);  // close radius/routes, etc.
+       if (!session[s].die)
+               sessionshutdown(s, reason, CDN_ADMIN_DISC, TERM_ADMIN_RESET);  // close radius/routes, etc.
+

        if (sess_local[s].radius)
                radiusclear(sess_local[s].radius, s); // cant send clean accounting data, session is killed
 
        if (sess_local[s].radius)
                radiusclear(sess_local[s].radius, s); // cant send clean accounting data, session is killed
 


@@ -1764,6 +2225,13 @@ static void tunnelclear(tunnelidt t)
        tunnel[t].state = TUNNELFREE;
 }
 
        tunnel[t].state = TUNNELFREE;
 }
 

+static void bundleclear(bundleidt b)
+{
+       if (!b) return;
+       memset(&bundle[b], 0, sizeof(bundle[b]));
+       bundle[b].state = BUNDLEFREE;
+}
+

 // kill a tunnel now
 static void tunnelkill(tunnelidt t, char *reason)
 {
 // kill a tunnel now
 static void tunnelkill(tunnelidt t, char *reason)
 {


@@ -1790,7 +2258,7 @@ static void tunnelkill(tunnelidt t, char *reason)
 
        // free tunnel
        tunnelclear(t);
 
        // free tunnel
        tunnelclear(t);

-       LOG(1, 0, t, "Kill tunnel %d: %s\n", t, reason);
+       LOG(1, 0, t, "Kill tunnel %u: %s\n", t, reason);

        cli_tunnel_actions[t].action = 0;
        cluster_send_tunnel(t);
 }
        cli_tunnel_actions[t].action = 0;
        cluster_send_tunnel(t);
 }


@@ -1808,7 +2276,7 @@ static void tunnelshutdown(tunnelidt t, char *reason, int result, int error, cha
                tunnelkill(t, reason);
                return;
        }
                tunnelkill(t, reason);
                return;
        }

-       LOG(1, 0, t, "Shutting down tunnel %d (%s)\n", t, reason);
+       LOG(1, 0, t, "Shutting down tunnel %u (%s)\n", t, reason);

 
        // close session
        for (s = 1; s <= config->cluster_highest_sessionid ; ++s)
 
        // close session
        for (s = 1; s <= config->cluster_highest_sessionid ; ++s)


@@ -1824,21 +2292,21 @@ static void tunnelshutdown(tunnelidt t, char *reason, int result, int error, cha
                controlt *c = controlnew(4);    // sending StopCCN
                if (error)
                {
                controlt *c = controlnew(4);    // sending StopCCN
                if (error)
                {

-                       uint8_t buf[64];
+                       uint16_t buf[32];

                        int l = 4;
                        int l = 4;

-                       *(uint16_t *) buf     = htons(result);
-                       *(uint16_t *) (buf+2) = htons(error);
+                       buf[0] = htons(result);
+                       buf[1] = htons(error);

                        if (msg)
                        {
                                int m = strlen(msg);
                                if (m + 4 > sizeof(buf))
                                    m = sizeof(buf) - 4;
 
                        if (msg)
                        {
                                int m = strlen(msg);
                                if (m + 4 > sizeof(buf))
                                    m = sizeof(buf) - 4;
 

-                               memcpy(buf+4, msg, m);
+                               memcpy(buf+2, msg, m);

                                l += m;
                        }
 
                                l += m;
                        }
 

-                       controlb(c, 1, buf, l, 1);
+                       controlb(c, 1, (uint8_t *)buf, l, 1);

                }
                else
                        control16(c, 1, result, 1);
                }
                else
                        control16(c, 1, result, 1);


@@ -1871,7 +2339,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
        }
        if ((buf[1] & 0x0F) != 2)
        {
        }
        if ((buf[1] & 0x0F) != 2)
        {

-               LOG(1, 0, 0, "Bad L2TP ver %d\n", (buf[1] & 0x0F) != 2);
+               LOG(1, 0, 0, "Bad L2TP ver %d\n", buf[1] & 0x0F);

                STAT(tunnel_rx_errors);
                return;
        }
                STAT(tunnel_rx_errors);
                return;
        }


@@ -1968,7 +2436,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                        }
                }
 
                        }
                }
 

-               LOG(3, s, t, "Control message (%d bytes): (unacked %d) l-ns %d l-nr %d r-ns %d r-nr %d\n",
+               LOG(3, s, t, "Control message (%d bytes): (unacked %d) l-ns %u l-nr %u r-ns %u r-nr %u\n",

                        l, tunnel[t].controlc, tunnel[t].ns, tunnel[t].nr, ns, nr);
 
                // if no tunnel specified, assign one
                        l, tunnel[t].controlc, tunnel[t].ns, tunnel[t].nr, ns, nr);
 
                // if no tunnel specified, assign one


@@ -1985,7 +2453,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                        tunnel[t].port = ntohs(addr->sin_port);
                        tunnel[t].window = 4; // default window
                        STAT(tunnel_created);
                        tunnel[t].port = ntohs(addr->sin_port);
                        tunnel[t].window = 4; // default window
                        STAT(tunnel_created);

-                       LOG(1, 0, t, "   New tunnel from %s:%u ID %d\n",
+                       LOG(1, 0, t, "   New tunnel from %s:%u ID %u\n",

                                fmtaddr(htonl(tunnel[t].ip), 0), tunnel[t].port, t);
                }
 
                                fmtaddr(htonl(tunnel[t].ip), 0), tunnel[t].port, t);
                }
 


@@ -1999,7 +2467,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                {
                        // is this the sequence we were expecting?
                        STAT(tunnel_rx_errors);
                {
                        // is this the sequence we were expecting?
                        STAT(tunnel_rx_errors);

-                       LOG(1, 0, t, "   Out of sequence tunnel %d, (%d is not the expected %d)\n",
+                       LOG(1, 0, t, "   Out of sequence tunnel %u, (%u is not the expected %u)\n",

                                t, ns, tunnel[t].nr);
 
                        if (l)  // Is this not a ZLB?
                                t, ns, tunnel[t].nr);
 
                        if (l)  // Is this not a ZLB?


@@ -2052,9 +2520,10 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                        int error = 0;
                        char *msg = 0;
 
                        int error = 0;
                        char *msg = 0;
 

-                       // default disconnect cause/message on receipt
-                       // of CDN (set to more specific value from
-                       // attribute 46 if present below).
+                       // Default disconnect cause/message on receipt of CDN.  Set to
+                       // more specific value from attribute 1 (result code) or 46
+                       // (disconnect cause) if present below.
+                       int disc_cause_set = 0;

                        int disc_cause = TERM_NAS_REQUEST;
                        char const *disc_reason = "Closed (Received CDN).";
 
                        int disc_cause = TERM_NAS_REQUEST;
                        char const *disc_reason = "Closed (Received CDN).";
 


@@ -2086,7 +2555,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                b += 2;
                                if (*(uint16_t *) (b))
                                {
                                b += 2;
                                if (*(uint16_t *) (b))
                                {

-                                       LOG(2, s, t, "Unknown AVP vendor %d\n", ntohs(*(uint16_t *) (b)));
+                                       LOG(2, s, t, "Unknown AVP vendor %u\n", ntohs(*(uint16_t *) (b)));

                                        fatal = flags;
                                        result = 2; // general error
                                        error = 6; // generic vendor-specific error
                                        fatal = flags;
                                        result = 2; // general error
                                        error = 6; // generic vendor-specific error


@@ -2151,7 +2620,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                        n = orig_len;
                                }
 
                                        n = orig_len;
                                }
 

-                               LOG(4, s, t, "   AVP %d (%s) len %d%s%s\n", mtype, l2tp_avp_name(mtype), n,
+                               LOG(4, s, t, "   AVP %u (%s) len %d%s%s\n", mtype, l2tp_avp_name(mtype), n,

                                        flags & 0x40 ? ", hidden" : "", flags & 0x80 ? ", mandatory" : "");
 
                                switch (mtype)
                                        flags & 0x40 ? ", hidden" : "", flags & 0x80 ? ", mandatory" : "");
 
                                switch (mtype)


@@ -2159,37 +2628,53 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                case 0:     // message type
                                        message = ntohs(*(uint16_t *) b);
                                        mandatory = flags & 0x80;
                                case 0:     // message type
                                        message = ntohs(*(uint16_t *) b);
                                        mandatory = flags & 0x80;

-                                       LOG(4, s, t, "   Message type = %d (%s)\n", *b, l2tp_code(message));
+                                       LOG(4, s, t, "   Message type = %u (%s)\n", message, l2tp_code(message));

                                        break;
                                case 1:     // result code
                                        {
                                                uint16_t rescode = ntohs(*(uint16_t *) b);
                                        break;
                                case 1:     // result code
                                        {
                                                uint16_t rescode = ntohs(*(uint16_t *) b);

-                                               const char* resdesc = "(unknown)";
+                                               char const *resdesc = "(unknown)";
+                                               char const *errdesc = NULL;
+                                               int cause = 0;
+

                                                if (message == 4)
                                                { /* StopCCN */
                                                        resdesc = l2tp_stopccn_result_code(rescode);
                                                if (message == 4)
                                                { /* StopCCN */
                                                        resdesc = l2tp_stopccn_result_code(rescode);

+                                                       cause = TERM_LOST_SERVICE;

                                                }
                                                else if (message == 14)
                                                { /* CDN */
                                                        resdesc = l2tp_cdn_result_code(rescode);
                                                }
                                                else if (message == 14)
                                                { /* CDN */
                                                        resdesc = l2tp_cdn_result_code(rescode);

+                                                       if (rescode == 1)
+                                                               cause = TERM_LOST_CARRIER;
+                                                       else
+                                                               cause = TERM_ADMIN_RESET;

                                                }
 
                                                }
 

-                                               LOG(4, s, t, "   Result Code %d: %s\n", rescode, resdesc);
+                                               LOG(4, s, t, "   Result Code %u: %s\n", rescode, resdesc);

                                                if (n >= 4)
                                                {
                                                        uint16_t errcode = ntohs(*(uint16_t *)(b + 2));
                                                if (n >= 4)
                                                {
                                                        uint16_t errcode = ntohs(*(uint16_t *)(b + 2));

-                                                       LOG(4, s, t, "   Error Code %d: %s\n", errcode, l2tp_error_code(errcode));
+                                                       errdesc = l2tp_error_code(errcode);
+                                                       LOG(4, s, t, "   Error Code %u: %s\n", errcode, errdesc);

                                                }
                                                if (n > 4)
                                                        LOG(4, s, t, "   Error String: %.*s\n", n-4, b+4);
 
                                                }
                                                if (n > 4)
                                                        LOG(4, s, t, "   Error String: %.*s\n", n-4, b+4);
 

+                                               if (cause && disc_cause_set < mtype) // take cause from attrib 46 in preference
+                                               {
+                                                       disc_cause_set = mtype;
+                                                       disc_reason = errdesc ? errdesc : resdesc;
+                                                       disc_cause = cause;
+                                               }
+

                                                break;
                                        }
                                        break;
                                case 2:     // protocol version
                                        {
                                                version = ntohs(*(uint16_t *) (b));
                                                break;
                                        }
                                        break;
                                case 2:     // protocol version
                                        {
                                                version = ntohs(*(uint16_t *) (b));

-                                               LOG(4, s, t, "   Protocol version = %d\n", version);
+                                               LOG(4, s, t, "   Protocol version = %u\n", version);

                                                if (version && version != 0x0100)
                                                {   // allow 0.0 and 1.0
                                                        LOG(1, s, t, "   Bad protocol version %04X\n", version);
                                                if (version && version != 0x0100)
                                                {   // allow 0.0 and 1.0
                                                        LOG(1, s, t, "   Bad protocol version %04X\n", version);


@@ -2223,13 +2708,13 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                        break;
                                case 9:     // assigned tunnel
                                        tunnel[t].far = ntohs(*(uint16_t *) (b));
                                        break;
                                case 9:     // assigned tunnel
                                        tunnel[t].far = ntohs(*(uint16_t *) (b));

-                                       LOG(4, s, t, "   Remote tunnel id = %d\n", tunnel[t].far);
+                                       LOG(4, s, t, "   Remote tunnel id = %u\n", tunnel[t].far);

                                        break;
                                case 10:    // rx window
                                        tunnel[t].window = ntohs(*(uint16_t *) (b));
                                        if (!tunnel[t].window)
                                                tunnel[t].window = 1; // window of 0 is silly
                                        break;
                                case 10:    // rx window
                                        tunnel[t].window = ntohs(*(uint16_t *) (b));
                                        if (!tunnel[t].window)
                                                tunnel[t].window = 1; // window of 0 is silly

-                                       LOG(4, s, t, "   rx window = %d\n", tunnel[t].window);
+                                       LOG(4, s, t, "   rx window = %u\n", tunnel[t].window);

                                        break;
                                case 11:        // Challenge
                                        {
                                        break;
                                case 11:        // Challenge
                                        {


@@ -2238,23 +2723,32 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                        }
                                        break;
                                case 13:    // Response
                                        }
                                        break;
                                case 13:    // Response

+#ifdef LAC
+                                       if (istunneltolns(t))
+                                       {
+                                               chapresponse = calloc(17, 1);
+                                               memcpy(chapresponse, b, (n < 17) ? n : 16);
+                                               LOG(1, s, t, "received challenge response from (REMOTE LNS)\n");
+                                       }
+                                       else
+#endif /* LAC */

                                        // Why did they send a response? We never challenge.
                                        LOG(2, s, t, "   received unexpected challenge response\n");
                                        break;
 
                                case 14:    // assigned session
                                        asession = session[s].far = ntohs(*(uint16_t *) (b));
                                        // Why did they send a response? We never challenge.
                                        LOG(2, s, t, "   received unexpected challenge response\n");
                                        break;
 
                                case 14:    // assigned session
                                        asession = session[s].far = ntohs(*(uint16_t *) (b));

-                                       LOG(4, s, t, "   assigned session = %d\n", asession);
+                                       LOG(4, s, t, "   assigned session = %u\n", asession);

                                        break;
                                case 15:    // call serial number
                                        break;
                                case 15:    // call serial number

-                                       LOG(4, s, t, "   call serial number = %d\n", ntohl(*(uint32_t *)b));
+                                       LOG(4, s, t, "   call serial number = %u\n", ntohl(*(uint32_t *)b));

                                        break;
                                case 18:    // bearer type
                                        break;
                                case 18:    // bearer type

-                                       LOG(4, s, t, "   bearer type = %d\n", ntohl(*(uint32_t *)b));
+                                       LOG(4, s, t, "   bearer type = %u\n", ntohl(*(uint32_t *)b));

                                        // TBA - for RADIUS
                                        break;
                                case 19:    // framing type
                                        // TBA - for RADIUS
                                        break;
                                case 19:    // framing type

-                                       LOG(4, s, t, "   framing type = %d\n", ntohl(*(uint32_t *)b));
+                                       LOG(4, s, t, "   framing type = %u\n", ntohl(*(uint32_t *)b));

                                        // TBA
                                        break;
                                case 21:    // called number
                                        // TBA
                                        break;
                                case 21:    // called number


@@ -2308,7 +2802,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                case 29:    // Proxy Authentication Type
                                        {
                                                uint16_t atype = ntohs(*(uint16_t *)b);
                                case 29:    // Proxy Authentication Type
                                        {
                                                uint16_t atype = ntohs(*(uint16_t *)b);

-                                               LOG(4, s, t, "   Proxy Auth Type %d (%s)\n", atype, ppp_auth_type(atype));
+                                               LOG(4, s, t, "   Proxy Auth Type %u (%s)\n", atype, ppp_auth_type(atype));

                                                break;
                                        }
                                case 30:    // Proxy Authentication Name
                                                break;
                                        }
                                case 30:    // Proxy Authentication Name


@@ -2328,7 +2822,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                case 32:    // Proxy Authentication ID
                                        {
                                                uint16_t authid = ntohs(*(uint16_t *)(b));
                                case 32:    // Proxy Authentication ID
                                        {
                                                uint16_t authid = ntohs(*(uint16_t *)(b));

-                                               LOG(4, s, t, "   Proxy Auth ID (%d)\n", authid);
+                                               LOG(4, s, t, "   Proxy Auth ID (%u)\n", authid);

                                                break;
                                        }
                                case 33:    // Proxy Authentication Response
                                                break;
                                        }
                                case 33:    // Proxy Authentication Response


@@ -2374,6 +2868,8 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                                        "(code=%u, proto=%04X, dir=%u, msg=\"%.*s\")\n",
                                                        code, proto, dir, n - 5, b + 5);
 
                                                        "(code=%u, proto=%04X, dir=%u, msg=\"%.*s\")\n",
                                                        code, proto, dir, n - 5, b + 5);
 

+                                               disc_cause_set = mtype;
+

                                                switch (code)
                                                {
                                                case 1: // admin disconnect
                                                switch (code)
                                                {
                                                case 1: // admin disconnect


@@ -2381,12 +2877,12 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                                        disc_reason = "Administrative disconnect";
                                                        break;
                                                case 3: // lcp terminate
                                                        disc_reason = "Administrative disconnect";
                                                        break;
                                                case 3: // lcp terminate

-                                                       if (dir != 1) break; // 1=peer, 2=local
+                                                       if (dir != 2) break; // 1=peer (LNS), 2=local (LAC)

                                                        disc_cause = TERM_USER_REQUEST;
                                                        disc_reason = "Normal disconnection";
                                                        break;
                                                case 4: // compulsory encryption unavailable
                                                        disc_cause = TERM_USER_REQUEST;
                                                        disc_reason = "Normal disconnection";
                                                        break;
                                                case 4: // compulsory encryption unavailable

-                                                       if (dir != 2) break; // 1=refused by peer, 2=local
+                                                       if (dir != 1) break; // 1=refused by peer, 2=local

                                                        disc_cause = TERM_USER_ERROR;
                                                        disc_reason = "Compulsory encryption refused";
                                                        break;
                                                        disc_cause = TERM_USER_ERROR;
                                                        disc_reason = "Compulsory encryption refused";
                                                        break;


@@ -2444,7 +2940,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                default:
                                        {
                                                static char e[] = "unknown AVP 0xXXXX";
                                default:
                                        {
                                                static char e[] = "unknown AVP 0xXXXX";

-                                               LOG(2, s, t, "   Unknown AVP type %d\n", mtype);
+                                               LOG(2, s, t, "   Unknown AVP type %u\n", mtype);

                                                fatal = flags;
                                                result = 2; // general error
                                                error = 8; // unknown mandatory AVP
                                                fatal = flags;
                                                result = 2; // general error
                                                error = 8; // unknown mandatory AVP


@@ -2478,9 +2974,44 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                        break;
                                case 2:       // SCCRP
                                        tunnel[t].state = TUNNELOPEN;
                                        break;
                                case 2:       // SCCRP
                                        tunnel[t].state = TUNNELOPEN;

+                                       tunnel[t].lastrec = time_now;
+#ifdef LAC
+                                       LOG(1, s, t, "Recieved SCCRP (REMOTE LNS)\n");
+                                       if (main_quit != QUIT_SHUTDOWN)
+                                       {
+                                               if (istunneltolns(t) && chapresponse)
+                                               {
+                                                       hasht hash;
+
+                                                       calc_lac_auth(t, 2, hash); // id = 2 (SCCRP)
+                                                       // check authenticator
+                                                       if (memcmp(hash, chapresponse, 16) == 0)
+                                                       {
+                                                               controlt *c = controlnew(3); // sending SCCCN
+                                                               controls(c, 7, hostname, 1); // host name
+                                                               controls(c, 8, Vendor_name, 1); // Vendor name
+                                                               control16(c, 2, version, 1); // protocol version
+                                                               control32(c, 3, 3, 1); // framing Capabilities
+                                                               control16(c, 9, t, 1); // assigned tunnel
+                                                               controladd(c, 0, t); // send
+
+                                                               LOG(1, s, t, "sending SCCCN (REMOTE LNS)\n");
+                                                       }
+                                                       else
+                                                       {
+                                                               tunnelshutdown(t, "(REMOTE LNS) Bad chap response", 4, 0, 0);
+                                                       }
+                                               }
+                                       }
+                                       else
+                                       {
+                                               tunnelshutdown(t, "Shutting down", 6, 0, 0);
+                                       }
+#endif /* LAC */

                                        break;
                                case 3:       // SCCN
                                        tunnel[t].state = TUNNELOPEN;
                                        break;
                                case 3:       // SCCN
                                        tunnel[t].state = TUNNELOPEN;

+                                       tunnel[t].lastrec = time_now;

                                        controlnull(t); // ack
                                        break;
                                case 4:       // StopCCN
                                        controlnull(t); // ack
                                        break;
                                case 4:       // StopCCN


@@ -2514,8 +3045,8 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                                session[s].opened = time_now;
                                                session[s].tunnel = t;
                                                session[s].far = asession;
                                                session[s].opened = time_now;
                                                session[s].tunnel = t;
                                                session[s].far = asession;

-                                               session[s].last_packet = time_now;
-                                               LOG(3, s, t, "New session (%d/%d)\n", tunnel[t].far, session[s].far);
+                                               session[s].last_packet = session[s].last_data = time_now;
+                                               LOG(3, s, t, "New session (%u/%u)\n", tunnel[t].far, session[s].far);

                                                control16(c, 14, s, 1); // assigned session
                                                controladd(c, asession, t); // send the reply
 
                                                control16(c, 14, s, 1); // assigned session
                                                controladd(c, asession, t); // send the reply
 


@@ -2544,7 +3075,23 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                        }
                                        return;
                                case 11:      // ICRP
                                        }
                                        return;
                                case 11:      // ICRP

-                                       // TBA
+#ifdef LAC
+                               LOG(1, s, t, "Recieved ICRP (REMOTE LNS)\n");
+                               if (session[s].forwardtosession)
+                               {
+                                       controlt *c = controlnew(12); // ICCN
+
+                                       session[s].opened = time_now;
+                                       session[s].tunnel = t;
+                                       session[s].far = asession;
+                                       session[s].last_packet = session[s].last_data = time_now;
+
+                                       control32(c, 19, 1, 1); // Framing Type
+                                       control32(c, 24, 10000000, 1); // Tx Connect Speed
+                                       controladd(c, asession, t); // send the message
+                                       LOG(1, s, t, "Sending ICCN (REMOTE LNS)\n");
+                               }
+#endif /* LAC */

                                        break;
                                case 12:      // ICCN
                                        if (amagic == 0) amagic = time_now;
                                        break;
                                case 12:      // ICCN
                                        if (amagic == 0) amagic = time_now;


@@ -2556,12 +3103,20 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                        // start LCP
                                        sess_local[s].lcp_authtype = config->radius_authprefer;
                                        sess_local[s].ppp_mru = MRU;
                                        // start LCP
                                        sess_local[s].lcp_authtype = config->radius_authprefer;
                                        sess_local[s].ppp_mru = MRU;

+
+                                       // Set multilink options before sending initial LCP packet
+                                       sess_local[s].mp_mrru = 1614;
+                                       sess_local[s].mp_epdis = ntohl(config->bind_address ? config->bind_address : my_address);
+

                                        sendlcp(s, t);
                                        change_state(s, lcp, RequestSent);
                                        break;
 
                                case 14:      // CDN
                                        controlnull(t); // ack
                                        sendlcp(s, t);
                                        change_state(s, lcp, RequestSent);
                                        break;
 
                                case 14:      // CDN
                                        controlnull(t); // ack

+#ifdef LAC
+
+#endif /* LAC */

                                        sessionshutdown(s, disc_reason, CDN_NONE, disc_cause);
                                        break;
                                case 0xFFFF:
                                        sessionshutdown(s, disc_reason, CDN_NONE, disc_cause);
                                        break;
                                case 0xFFFF:


@@ -2572,7 +3127,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                        if (mandatory)
                                                tunnelshutdown(t, "Unknown message type", 2, 6, "unknown message type");
                                        else
                                        if (mandatory)
                                                tunnelshutdown(t, "Unknown message type", 2, 6, "unknown message type");
                                        else

-                                               LOG(1, s, t, "Unknown message type %d\n", message);
+                                               LOG(1, s, t, "Unknown message type %u\n", message);

                                        break;
                                }
                        if (chapresponse) free(chapresponse);
                                        break;
                                }
                        if (chapresponse) free(chapresponse);


@@ -2611,6 +3166,16 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                        l -= 2;
                }
 
                        l -= 2;
                }
 

+#ifdef LAC
+               if (session[s].forwardtosession)
+               {
+                       LOG(4, s, t, "Forwarding data session to %u (REMOTE LNS)\n", session[s].forwardtosession);
+                       // Forward to Remote LNS
+                       session_forward_tolns(buf, len, s, proto);
+                       return;
+               }
+#endif /* LAC */
+

                if (s && !session[s].opened)    // Is something wrong??
                {
                        if (!config->cluster_iam_master)
                if (s && !session[s].opened)    // Is something wrong??
                {
                        if (!config->cluster_iam_master)


@@ -2620,7 +3185,6 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                return;
                        }
 
                                return;
                        }
 

-

                        LOG(1, s, t, "UDP packet contains session which is not opened.  Dropping packet.\n");
                        STAT(tunnel_rx_errors);
                        return;
                        LOG(1, s, t, "UDP packet contains session which is not opened.  Dropping packet.\n");
                        STAT(tunnel_rx_errors);
                        return;


@@ -2666,11 +3230,11 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                {
                        if (session[s].die)
                        {
                {
                        if (session[s].die)
                        {

-                               LOG(4, s, t, "Session %d is closing.  Don't process PPP packets\n", s);
+                               LOG(4, s, t, "Session %u is closing.  Don't process PPP packets\n", s);

                                return;              // closing session, PPP not processed
                        }
 
                                return;              // closing session, PPP not processed
                        }
 

-                       session[s].last_packet = time_now;
+                       session[s].last_packet = session[s].last_data = time_now;

                        if (session[s].walled_garden && !config->cluster_iam_master)
                        {
                                master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port);
                        if (session[s].walled_garden && !config->cluster_iam_master)
                        {
                                master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port);


@@ -2679,15 +3243,33 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 
                        processipin(s, t, p, l);
                }
 
                        processipin(s, t, p, l);
                }

+               else if (proto == PPPMP)
+               {
+                       if (session[s].die)
+                       {
+                               LOG(4, s, t, "Session %u is closing.  Don't process PPP packets\n", s);
+                               return;              // closing session, PPP not processed
+                       }
+
+                       session[s].last_packet = session[s].last_data = time_now;
+                       if (!config->cluster_iam_master)
+                       {
+                               // The fragments reconstruction is managed by the Master.
+                               master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port);
+                               return;
+                       }
+
+                       processmpin(s, t, p, l);
+               }

                else if (proto == PPPIPV6 && config->ipv6_prefix.s6_addr[0])
                {
                        if (session[s].die)
                        {
                else if (proto == PPPIPV6 && config->ipv6_prefix.s6_addr[0])
                {
                        if (session[s].die)
                        {

-                               LOG(4, s, t, "Session %d is closing.  Don't process PPP packets\n", s);
+                               LOG(4, s, t, "Session %u is closing.  Don't process PPP packets\n", s);

                                return;              // closing session, PPP not processed
                        }
 
                                return;              // closing session, PPP not processed
                        }
 

-                       session[s].last_packet = time_now;
+                       session[s].last_packet = session[s].last_data = time_now;

                        if (session[s].walled_garden && !config->cluster_iam_master)
                        {
                                master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port);
                        if (session[s].walled_garden && !config->cluster_iam_master)
                        {
                                master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port);


@@ -2711,6 +3293,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 }
 
 // read and process packet on tun
 }
 
 // read and process packet on tun

+// (i.e. this routine writes to buf[-8]).

 static void processtun(uint8_t * buf, int len)
 {
        LOG_HEX(5, "Receive TUN Data", buf, len);
 static void processtun(uint8_t * buf, int len)
 {
        LOG_HEX(5, "Receive TUN Data", buf, len);


@@ -2801,7 +3384,7 @@ static void regular_cleanups(double period)
                        if (tunnel[t].retry <= TIME)
                        {
                                controlt *c = tunnel[t].controls;
                        if (tunnel[t].retry <= TIME)
                        {
                                controlt *c = tunnel[t].controls;

-                               uint8_t w = tunnel[t].window;
+                               uint16_t w = tunnel[t].window;

                                tunnel[t].try++; // another try
                                if (tunnel[t].try > 5)
                                        tunnelkill(t, "Timeout on control message"); // game over
                                tunnel[t].try++; // another try
                                if (tunnel[t].try > 5)
                                        tunnelkill(t, "Timeout on control message"); // game over


@@ -2984,8 +3567,8 @@ static void regular_cleanups(double period)
                        }
                }
 
                        }
                }
 

-               // Drop sessions who have not responded within IDLE_TIMEOUT seconds
-               if (session[s].last_packet && (time_now - session[s].last_packet >= IDLE_TIMEOUT))
+               // Drop sessions who have not responded within IDLE_ECHO_TIMEOUT seconds
+               if (session[s].last_packet && (time_now - session[s].last_packet >= config->idle_echo_timeout))

                {
                        sessionshutdown(s, "No response to LCP ECHO requests.", CDN_ADMIN_DISC, TERM_LOST_SERVICE);
                        STAT(session_timeout);
                {
                        sessionshutdown(s, "No response to LCP ECHO requests.", CDN_ADMIN_DISC, TERM_LOST_SERVICE);
                        STAT(session_timeout);


@@ -2994,12 +3577,12 @@ static void regular_cleanups(double period)
                }
 
                // No data in ECHO_TIMEOUT seconds, send LCP ECHO
                }
 
                // No data in ECHO_TIMEOUT seconds, send LCP ECHO

-               if (session[s].ppp.phase >= Establish && (time_now - session[s].last_packet >= ECHO_TIMEOUT) &&
+               if (session[s].ppp.phase >= Establish && (time_now - session[s].last_packet >= config->echo_timeout) &&

                        (time_now - sess_local[s].last_echo >= ECHO_TIMEOUT))
                {
                        uint8_t b[MAXETHER];
 
                        (time_now - sess_local[s].last_echo >= ECHO_TIMEOUT))
                {
                        uint8_t b[MAXETHER];
 

-                       uint8_t *q = makeppp(b, sizeof(b), 0, 0, s, session[s].tunnel, PPPLCP);
+                       uint8_t *q = makeppp(b, sizeof(b), 0, 0, s, session[s].tunnel, PPPLCP, 1, 0, 0);

                        if (!q) continue;
 
                        *q = EchoReq;
                        if (!q) continue;
 
                        *q = EchoReq;


@@ -3014,6 +3597,45 @@ static void regular_cleanups(double period)
                        s_actions++;
                }
 
                        s_actions++;
                }
 

+               // Drop sessions who have reached session_timeout seconds
+               if (session[s].session_timeout)
+               {
+                       bundleidt bid = session[s].bundle;
+                       if (bid)
+                       {
+                               if (time_now - bundle[bid].last_check >= 1)
+                               {
+                                       bundle[bid].online_time += (time_now - bundle[bid].last_check) * bundle[bid].num_of_links;
+                                       bundle[bid].last_check = time_now;
+                                       if (bundle[bid].online_time >= session[s].session_timeout)
+                                       {
+                                               int ses;
+                                               for (ses = bundle[bid].num_of_links - 1; ses >= 0; ses--)
+                                               {
+                                                       sessionshutdown(bundle[bid].members[ses], "Session timeout", CDN_ADMIN_DISC, TERM_SESSION_TIMEOUT);
+                                                       s_actions++;
+                                                       continue;
+                                               }
+                                       }
+                               }
+                       }
+                       else if (time_now - session[s].opened >= session[s].session_timeout)
+                       {
+                               sessionshutdown(s, "Session timeout", CDN_ADMIN_DISC, TERM_SESSION_TIMEOUT);
+                               s_actions++;
+                               continue;
+                       }
+               }
+
+               // Drop sessions who have reached idle_timeout seconds
+               if (session[s].last_data && session[s].idle_timeout && (time_now - session[s].last_data >= session[s].idle_timeout))
+               {
+                       sessionshutdown(s, "Idle Timeout Reached", CDN_ADMIN_DISC, TERM_IDLE_TIMEOUT);
+                       STAT(session_timeout);
+                       s_actions++;
+                       continue;
+               }
+

                // Check for actions requested from the CLI
                if ((a = cli_session_actions[s].action))
                {
                // Check for actions requested from the CLI
                if ((a = cli_session_actions[s].action))
                {


@@ -3038,7 +3660,7 @@ static void regular_cleanups(double period)
                        }
                        else if (a & CLI_SESS_SNOOP)
                        {
                        }
                        else if (a & CLI_SESS_SNOOP)
                        {

-                               LOG(2, s, session[s].tunnel, "Snooping session by CLI (to %s:%d)\n",
+                               LOG(2, s, session[s].tunnel, "Snooping session by CLI (to %s:%u)\n",

                                    fmtaddr(cli_session_actions[s].snoop_ip, 0),
                                    cli_session_actions[s].snoop_port);
 
                                    fmtaddr(cli_session_actions[s].snoop_ip, 0),
                                    cli_session_actions[s].snoop_port);
 


@@ -3092,7 +3714,8 @@ static void regular_cleanups(double period)
                if (config->radius_accounting && config->radius_interim > 0
                    && session[s].ip && !session[s].walled_garden
                    && !sess_local[s].radius // RADIUS already in progress
                if (config->radius_accounting && config->radius_interim > 0
                    && session[s].ip && !session[s].walled_garden
                    && !sess_local[s].radius // RADIUS already in progress

-                   && time_now - sess_local[s].last_interim >= config->radius_interim)
+                   && time_now - sess_local[s].last_interim >= config->radius_interim
+                   && session[s].flags & SESSION_STARTED)

                {
                        int rad = radiusnew(s);
                        if (!rad)
                {
                        int rad = radiusnew(s);
                        if (!rad)


@@ -3125,35 +3748,36 @@ static int still_busy(void)
        static clockt last_talked = 0;
        static clockt start_busy_wait = 0;
 
        static clockt last_talked = 0;
        static clockt start_busy_wait = 0;
 

-       if (!config->cluster_iam_master)
-       {

 #ifdef BGP
 #ifdef BGP

-               static time_t stopped_bgp = 0;
-               if (bgp_configured)
+       static time_t stopped_bgp = 0;
+       if (bgp_configured)
+       {
+               if (!stopped_bgp)

                {
                {

-                       if (!stopped_bgp)
-                       {
-                               LOG(1, 0, 0, "Shutting down in %d seconds, stopping BGP...\n", QUIT_DELAY);
+                       LOG(1, 0, 0, "Shutting down in %d seconds, stopping BGP...\n", QUIT_DELAY);

 
 

-                               for (i = 0; i < BGP_NUM_PEERS; i++)
-                                       if (bgp_peers[i].state == Established)
-                                               bgp_stop(&bgp_peers[i]);
+                       for (i = 0; i < BGP_NUM_PEERS; i++)
+                               if (bgp_peers[i].state == Established)
+                                       bgp_stop(&bgp_peers[i]);

 
 

-                               stopped_bgp = time_now;
+                       stopped_bgp = time_now;

 
 

+                       if (!config->cluster_iam_master)
+                       {

                                // we don't want to become master
                                cluster_send_ping(0);
 
                                return 1;
                        }
                                // we don't want to become master
                                cluster_send_ping(0);
 
                                return 1;
                        }

-
-                       if (time_now < (stopped_bgp + QUIT_DELAY))
-                               return 1;

                }
                }

+
+               if (!config->cluster_iam_master && time_now < (stopped_bgp + QUIT_DELAY))
+                       return 1;
+       }

 #endif /* BGP */
 
 #endif /* BGP */
 

+       if (!config->cluster_iam_master)

                return 0;
                return 0;

-       }

 
        if (main_quit == QUIT_SHUTDOWN)
        {
 
        if (main_quit == QUIT_SHUTDOWN)
        {


@@ -3181,7 +3805,7 @@ static int still_busy(void)
 
                if (last_talked != TIME)
                {
 
                if (last_talked != TIME)
                {

-                       LOG(2, 0, 0, "Tunnel %d still has un-acked control messages.\n", i);
+                       LOG(2, 0, 0, "Tunnel %u still has un-acked control messages.\n", i);

                        last_talked = TIME;
                }
                return 1;
                        last_talked = TIME;
                }
                return 1;


@@ -3203,7 +3827,7 @@ static int still_busy(void)
 
                if (last_talked != TIME)
                {
 
                if (last_talked != TIME)
                {

-                       LOG(2, 0, 0, "Radius session %d is still busy (sid %d)\n", i, radius[i].session);
+                       LOG(2, 0, 0, "Radius session %u is still busy (sid %u)\n", i, radius[i].session);

                        last_talked = TIME;
                }
                return 1;
                        last_talked = TIME;
                }
                return 1;


@@ -3219,8 +3843,8 @@ static int still_busy(void)
 # include "fake_epoll.h"
 #endif
 
 # include "fake_epoll.h"
 #endif
 

-// the base set of fds polled: cli, cluster, tun, udp, control, dae
-#define BASE_FDS       6
+// the base set of fds polled: cli, cluster, tun, udp, control, dae, netlink
+#define BASE_FDS       7

 
 // additional polled fds
 #ifdef BGP
 
 // additional polled fds
 #ifdef BGP


@@ -3234,6 +3858,8 @@ static void mainloop(void)
 {
        int i;
        uint8_t buf[65536];
 {
        int i;
        uint8_t buf[65536];

+       uint8_t *p = buf + 8; // for the hearder of the forwarded MPPP packet (see C_MPPP_FORWARD)
+       int size_bufp = sizeof(buf) - 8;

        clockt next_cluster_ping = 0;   // send initial ping immediately
        struct epoll_event events[BASE_FDS + RADIUS_FDS + EXTRA_FDS];
        int maxevent = sizeof(events)/sizeof(*events);
        clockt next_cluster_ping = 0;   // send initial ping immediately
        struct epoll_event events[BASE_FDS + RADIUS_FDS + EXTRA_FDS];
        int maxevent = sizeof(events)/sizeof(*events);


@@ -3244,8 +3870,8 @@ static void mainloop(void)
                exit(1);
        }
 
                exit(1);
        }
 

-       LOG(4, 0, 0, "Beginning of main loop.  clifd=%d, cluster_sockfd=%d, tunfd=%d, udpfd=%d, controlfd=%d, daefd=%d\n",
-               clifd, cluster_sockfd, tunfd, udpfd, controlfd, daefd);
+       LOG(4, 0, 0, "Beginning of main loop.  clifd=%d, cluster_sockfd=%d, tunfd=%d, udpfd=%d, controlfd=%d, daefd=%d, nlfd=%d\n",
+               clifd, cluster_sockfd, tunfd, udpfd, controlfd, daefd, nlfd);

 
        /* setup our fds to poll for input */
        {
 
        /* setup our fds to poll for input */
        {


@@ -3255,9 +3881,12 @@ static void mainloop(void)
                e.events = EPOLLIN;
                i = 0;
 
                e.events = EPOLLIN;
                i = 0;
 

-               d[i].type = FD_TYPE_CLI;
-               e.data.ptr = &d[i++];
-               epoll_ctl(epollfd, EPOLL_CTL_ADD, clifd, &e);
+               if (clifd >= 0)
+               {
+                       d[i].type = FD_TYPE_CLI;
+                       e.data.ptr = &d[i++];
+                       epoll_ctl(epollfd, EPOLL_CTL_ADD, clifd, &e);
+               }

 
                d[i].type = FD_TYPE_CLUSTER;
                e.data.ptr = &d[i++];
 
                d[i].type = FD_TYPE_CLUSTER;
                e.data.ptr = &d[i++];


@@ -3278,6 +3907,10 @@ static void mainloop(void)
                d[i].type = FD_TYPE_DAE;
                e.data.ptr = &d[i++];
                epoll_ctl(epollfd, EPOLL_CTL_ADD, daefd, &e);
                d[i].type = FD_TYPE_DAE;
                e.data.ptr = &d[i++];
                epoll_ctl(epollfd, EPOLL_CTL_ADD, daefd, &e);

+
+               d[i].type = FD_TYPE_NETLINK;
+               e.data.ptr = &d[i++];
+               epoll_ctl(epollfd, EPOLL_CTL_ADD, nlfd, &e);

        }
 
 #ifdef BGP
        }
 
 #ifdef BGP


@@ -3291,7 +3924,8 @@ static void mainloop(void)
                if (config->neighbour[i].name[0])
                        bgp_start(&bgp_peers[i], config->neighbour[i].name,
                                config->neighbour[i].as, config->neighbour[i].keepalive,
                if (config->neighbour[i].name[0])
                        bgp_start(&bgp_peers[i], config->neighbour[i].name,
                                config->neighbour[i].as, config->neighbour[i].keepalive,

-                               config->neighbour[i].hold, 0); /* 0 = routing disabled */
+                               config->neighbour[i].hold, config->neighbour[i].update_source,
+                               0); /* 0 = routing disabled */

        }
 #endif /* BGP */
 
        }
 #endif /* BGP */
 


@@ -3414,6 +4048,32 @@ static void mainloop(void)
                                        break;
 #endif /* BGP */
 
                                        break;
 #endif /* BGP */
 

+                               case FD_TYPE_NETLINK:
+                               {
+                                       struct nlmsghdr *nh = (struct nlmsghdr *)buf;
+                                       s = netlink_recv(buf, sizeof(buf));
+                                       if (nh->nlmsg_type == NLMSG_ERROR)
+                                       {
+                                               struct nlmsgerr *errmsg = NLMSG_DATA(nh);
+                                               if (errmsg->error)
+                                               {
+                                                       if (errmsg->msg.nlmsg_seq < min_initok_nlseqnum)
+                                                       {
+                                                               LOG(0, 0, 0, "Got a fatal netlink error (while %s): %s\n", tun_nl_phase_msg[nh->nlmsg_seq], strerror(-errmsg->error));
+                                                               exit(1);
+                                                       }
+                                                       else
+
+                                                               LOG(0, 0, 0, "Got a netlink error: %s\n", strerror(-errmsg->error));
+                                               }
+                                               // else it's a ack
+                                       }
+                                       else
+                                               LOG(1, 0, 0, "Got a unknown netlink message: type %d seq %d flags %d\n", nh->nlmsg_type, nh->nlmsg_seq, nh->nlmsg_flags);
+                                       n--;
+                                       break;
+                               }
+

                                default:
                                        LOG(0, 0, 0, "Unexpected fd type returned from epoll_wait: %d\n", d->type);
                                }
                                default:
                                        LOG(0, 0, 0, "Unexpected fd type returned from epoll_wait: %d\n", d->type);
                                }


@@ -3444,9 +4104,9 @@ static void mainloop(void)
                                // incoming IP
                                if (tun_ready)
                                {
                                // incoming IP
                                if (tun_ready)
                                {

-                                       if ((s = read(tunfd, buf, sizeof(buf))) > 0)
+                                       if ((s = read(tunfd, p, size_bufp)) > 0)

                                        {
                                        {

-                                               processtun(buf, s);
+                                               processtun(p, s);

                                                tun_pkts++;
                                        }
                                        else
                                                tun_pkts++;
                                        }
                                        else


@@ -3485,6 +4145,11 @@ static void mainloop(void)
                                more++;
                        }
                }
                                more++;
                        }
                }

+#ifdef BGP
+               else
+                       /* no event received, but timers could still have expired */
+                       bgp_process_peers_timers();
+#endif /* BGP */

 
                if (time_changed)
                {
 
                if (time_changed)
                {


@@ -3688,7 +4353,11 @@ static void initdata(int optdebug, char *optconfig)
        config->ppp_restart_time = 3;
        config->ppp_max_configure = 10;
        config->ppp_max_failure = 5;
        config->ppp_restart_time = 3;
        config->ppp_max_configure = 10;
        config->ppp_max_failure = 5;

+       config->kill_timedout_sessions = 1;

        strcpy(config->random_device, RANDOMDEVICE);
        strcpy(config->random_device, RANDOMDEVICE);

+       // Set default value echo_timeout and idle_echo_timeout
+       config->echo_timeout = ECHO_TIMEOUT;
+       config->idle_echo_timeout = IDLE_ECHO_TIMEOUT;

 
        log_stream = stderr;
 
 
        log_stream = stderr;
 


@@ -3711,6 +4380,16 @@ static void initdata(int optdebug, char *optconfig)
                LOG(0, 0, 0, "Error doing malloc for tunnels: %s\n", strerror(errno));
                exit(1);
        }
                LOG(0, 0, 0, "Error doing malloc for tunnels: %s\n", strerror(errno));
                exit(1);
        }

+       if (!(bundle = shared_malloc(sizeof(bundlet) * MAXBUNDLE)))
+       {
+               LOG(0, 0, 0, "Error doing malloc for bundles: %s\n", strerror(errno));
+               exit(1);
+       }
+       if (!(frag = shared_malloc(sizeof(fragmentationt) * MAXBUNDLE)))
+       {
+               LOG(0, 0, 0, "Error doing malloc for fragmentations: %s\n", strerror(errno));
+               exit(1);
+       }

        if (!(session = shared_malloc(sizeof(sessiont) * MAXSESSION)))
        {
                LOG(0, 0, 0, "Error doing malloc for sessions: %s\n", strerror(errno));
        if (!(session = shared_malloc(sizeof(sessiont) * MAXSESSION)))
        {
                LOG(0, 0, 0, "Error doing malloc for sessions: %s\n", strerror(errno));


@@ -3757,6 +4436,7 @@ static void initdata(int optdebug, char *optconfig)
        memset(cli_tunnel_actions, 0, sizeof(struct cli_tunnel_actions) * MAXSESSION);
 
        memset(tunnel, 0, sizeof(tunnelt) * MAXTUNNEL);
        memset(cli_tunnel_actions, 0, sizeof(struct cli_tunnel_actions) * MAXSESSION);
 
        memset(tunnel, 0, sizeof(tunnelt) * MAXTUNNEL);

+       memset(bundle, 0, sizeof(bundlet) * MAXBUNDLE);

        memset(session, 0, sizeof(sessiont) * MAXSESSION);
        memset(radius, 0, sizeof(radiust) * MAXRADIUS);
        memset(ip_address_pool, 0, sizeof(ippoolt) * MAXIPPOOL);
        memset(session, 0, sizeof(sessiont) * MAXSESSION);
        memset(radius, 0, sizeof(radiust) * MAXRADIUS);
        memset(ip_address_pool, 0, sizeof(ippoolt) * MAXIPPOOL);


@@ -3774,6 +4454,10 @@ static void initdata(int optdebug, char *optconfig)
        for (i = 1; i < MAXTUNNEL; i++)
                tunnel[i].state = TUNNELUNDEF;  // mark it as not filled in.
 
        for (i = 1; i < MAXTUNNEL; i++)
                tunnel[i].state = TUNNELUNDEF;  // mark it as not filled in.
 

+       for (i = 1; i < MAXBUNDLE; i++) {
+               bundle[i].state = BUNDLEUNDEF;
+       }
+

        if (!*hostname)
        {
                // Grab my hostname unless it's been specified
        if (!*hostname)
        {
                // Grab my hostname unless it's been specified


@@ -3790,6 +4474,10 @@ static void initdata(int optdebug, char *optconfig)
                exit(1);
        }
 #endif /* BGP */
                exit(1);
        }
 #endif /* BGP */

+
+#ifdef LAC
+       initremotelnsdata();
+#endif

 }
 
 static int assign_ip_address(sessionidt s)
 }
 
 static int assign_ip_address(sessionidt s)


@@ -3908,7 +4596,7 @@ void rebuild_address_pool(void)
                        if (ipid < 1)                   // Not found in the pool either? good.
                                continue;
 
                        if (ipid < 1)                   // Not found in the pool either? good.
                                continue;
 

-                       LOG(0, i, 0, "Session %d has an IP address (%s) that was marked static, but is in the pool (%d)!\n",
+                       LOG(0, i, 0, "Session %u has an IP address (%s) that was marked static, but is in the pool (%d)!\n",

                                i, fmtaddr(session[i].ip, 0), ipid);
 
                        // Fall through and process it as part of the pool.
                                i, fmtaddr(session[i].ip, 0), ipid);
 
                        // Fall through and process it as part of the pool.


@@ -3917,7 +4605,7 @@ void rebuild_address_pool(void)
 
                if (ipid > MAXIPPOOL || ipid < 0)
                {
 
                if (ipid > MAXIPPOOL || ipid < 0)
                {

-                       LOG(0, i, 0, "Session %d has a pool IP that's not found in the pool! (%d)\n", i, ipid);
+                       LOG(0, i, 0, "Session %u has a pool IP that's not found in the pool! (%d)\n", i, ipid);

                        ipid = -1;
                        session[i].ip_pool_index = ipid;
                        continue;
                        ipid = -1;
                        session[i].ip_pool_index = ipid;
                        continue;


@@ -3956,18 +4644,18 @@ static void fix_address_pool(int sid)
 //
 // Add a block of addresses to the IP pool to hand out.
 //
 //
 // Add a block of addresses to the IP pool to hand out.
 //

-static void add_to_ip_pool(in_addr_t addr, in_addr_t mask)
+static void add_to_ip_pool(in_addr_t addr, int prefixlen)

 {
        int i;
 {
        int i;

-       if (mask == 0)
-               mask = 0xffffffff;      // Host route only.
+       if (prefixlen == 0)
+               prefixlen = 32;         // Host route only.

 
 

-       addr &= mask;
+       addr &= 0xffffffff << (32 - prefixlen);

 
        if (ip_pool_size >= MAXIPPOOL)  // Pool is full!
                return ;
 
 
        if (ip_pool_size >= MAXIPPOOL)  // Pool is full!
                return ;
 

-       for (i = addr ;(i & mask) == addr; ++i)
+       for (i = addr ; i < addr+(1<<(32-prefixlen)); ++i)

        {
                if ((i & 0xff) == 0 || (i&0xff) == 255)
                        continue;       // Skip 0 and broadcast addresses.
        {
                if ((i & 0xff) == 0 || (i&0xff) == 255)
                        continue;       // Skip 0 and broadcast addresses.


@@ -4025,7 +4713,7 @@ static void initippool()
                {
                        // It's a range
                        int numbits = 0;
                {
                        // It's a range
                        int numbits = 0;

-                       in_addr_t start = 0, mask = 0;
+                       in_addr_t start = 0;

 
                        LOG(2, 0, 0, "Adding IP address range %s\n", buf);
                        *p++ = 0;
 
                        LOG(2, 0, 0, "Adding IP address range %s\n", buf);
                        *p++ = 0;


@@ -4035,15 +4723,14 @@ static void initippool()
                                continue;
                        }
                        start = ntohl(inet_addr(pool));
                                continue;
                        }
                        start = ntohl(inet_addr(pool));

-                       mask = (in_addr_t) (pow(2, numbits) - 1) << (32 - numbits);

 
                        // Add a static route for this pool
 
                        // Add a static route for this pool

-                       LOG(5, 0, 0, "Adding route for address pool %s/%u\n",
-                               fmtaddr(htonl(start), 0), 32 + mask);
+                       LOG(5, 0, 0, "Adding route for address pool %s/%d\n",
+                               fmtaddr(htonl(start), 0), numbits);

 
 

-                       routeset(0, start, mask, 0, 1);
+                       routeset(0, start, numbits, 0, 1);

 
 

-                       add_to_ip_pool(start, mask);
+                       add_to_ip_pool(start, numbits);

                }
                else
                {
                }
                else
                {


@@ -4065,7 +4752,7 @@ void snoop_send_packet(uint8_t *packet, uint16_t size, in_addr_t destination, ui
        snoop_addr.sin_addr.s_addr = destination;
        snoop_addr.sin_port = ntohs(port);
 
        snoop_addr.sin_addr.s_addr = destination;
        snoop_addr.sin_port = ntohs(port);
 

-       LOG(5, 0, 0, "Snooping %d byte packet to %s:%d\n", size,
+       LOG(5, 0, 0, "Snooping %d byte packet to %s:%u\n", size,

                fmtaddr(snoop_addr.sin_addr.s_addr, 0),
                htons(snoop_addr.sin_port));
 
                fmtaddr(snoop_addr.sin_addr.s_addr, 0),
                htons(snoop_addr.sin_port));
 


@@ -4194,13 +4881,17 @@ int main(int argc, char *argv[])
        initplugins();
        initdata(optdebug, optconfig);
 
        initplugins();
        initdata(optdebug, optconfig);
 

-       init_cli(hostname);
+       init_cli();

        read_config_file();
        read_config_file();

+       /* set hostname /after/ having read the config file */
+       if (*config->hostname)
+               strcpy(hostname, config->hostname);
+       cli_init_complete(hostname);

        update_config();
        init_tbf(config->num_tbfs);
 
        LOG(0, 0, 0, "L2TPNS version " VERSION "\n");
        update_config();
        init_tbf(config->num_tbfs);
 
        LOG(0, 0, 0, "L2TPNS version " VERSION "\n");

-       LOG(0, 0, 0, "Copyright (c) 2003, 2004, 2005 Optus Internet Engineering\n");
+       LOG(0, 0, 0, "Copyright (c) 2003, 2004, 2005, 2006 Optus Internet Engineering\n");

        LOG(0, 0, 0, "Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced\n");
        {
                struct rlimit rlim;
        LOG(0, 0, 0, "Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced\n");
        {
                struct rlimit rlim;


@@ -4239,6 +4930,8 @@ int main(int argc, char *argv[])
                }
        }
 
                }
        }
 

+       initnetlink();
+

        /* Set up the cluster communications port. */
        if (cluster_init() < 0)
                exit(1);
        /* Set up the cluster communications port. */
        if (cluster_init() < 0)
                exit(1);


@@ -4272,10 +4965,6 @@ int main(int argc, char *argv[])
                        LOG(0, 0, 0, "Can't lock pages: %s\n", strerror(errno));
        }
 
                        LOG(0, 0, 0, "Can't lock pages: %s\n", strerror(errno));
        }
 

-       // Drop privileges here
-       if (config->target_uid > 0 && geteuid() == 0)
-               setuid(config->target_uid);
-

        mainloop();
 
        /* remove plugins (so cleanup code gets run) */
        mainloop();
 
        /* remove plugins (so cleanup code gets run) */


@@ -4503,6 +5192,40 @@ static void update_config()
                }
        }
 
                }
        }
 

+       // Guest change
+        guest_accounts_num = 0;
+        char *p2 = config->guest_user;
+        while (p2 && *p2)
+        {
+                char *s = strpbrk(p2, " \t,");
+                if (s)
+                {
+                        *s++ = 0;
+                        while (*s == ' ' || *s == '\t')
+                                s++;
+
+                        if (!*s)
+                                s = 0;
+                }
+
+                strcpy(guest_users[guest_accounts_num], p2);
+                LOG(1, 0, 0, "Guest account[%d]: %s\n", guest_accounts_num, guest_users[guest_accounts_num]);
+                guest_accounts_num++;
+                p2 = s;
+        }
+        // Rebuild the guest_user array
+        strcpy(config->guest_user, "");
+        int ui = 0;
+        for (ui=0; ui<guest_accounts_num; ui++)
+        {
+                strcat(config->guest_user, guest_users[ui]);
+                if (ui<guest_accounts_num-1)
+                {
+                        strcat(config->guest_user, ",");
+                }
+        }
+
+

        memcpy(config->old_plugins, config->plugins, sizeof(config->plugins));
        if (!config->multi_read_count) config->multi_read_count = 10;
        if (!config->cluster_address) config->cluster_address = inet_addr(DEFAULT_MCAST_ADDR);
        memcpy(config->old_plugins, config->plugins, sizeof(config->plugins));
        if (!config->multi_read_count) config->multi_read_count = 10;
        if (!config->cluster_address) config->cluster_address = inet_addr(DEFAULT_MCAST_ADDR);


@@ -4581,6 +5304,20 @@ int sessionsetup(sessionidt s, tunnelidt t)
 
        LOG(3, s, t, "Doing session setup for session\n");
 
 
        LOG(3, s, t, "Doing session setup for session\n");
 

+       // Join a bundle if the MRRU option is accepted
+       if(session[s].mrru > 0 && session[s].bundle == 0)
+       {
+               LOG(3, s, t, "This session can be part of multilink bundle\n");
+               if (join_bundle(s) > 0)
+                       cluster_send_bundle(session[s].bundle);
+               else
+               {
+                       LOG(0, s, t, "MPPP: Mismaching mssf option with other sessions in bundle\n");
+                       sessionshutdown(s, "Mismaching mssf option.", CDN_NONE, TERM_SERVICE_UNAVAILABLE);
+                       return 0;
+               }
+       }
+

        if (!session[s].ip)
        {
                assign_ip_address(s);
        if (!session[s].ip)
        {
                assign_ip_address(s);


@@ -4594,7 +5331,6 @@ int sessionsetup(sessionidt s, tunnelidt t)
                        fmtaddr(htonl(session[s].ip), 0));
        }
 
                        fmtaddr(htonl(session[s].ip), 0));
        }
 

-

        // Make sure this is right
        session[s].tunnel = t;
 
        // Make sure this is right
        session[s].tunnel = t;
 


@@ -4607,31 +5343,51 @@ int sessionsetup(sessionidt s, tunnelidt t)
                for (i = 1; i <= config->cluster_highest_sessionid; i++)
                {
                        if (i == s) continue;
                for (i = 1; i <= config->cluster_highest_sessionid; i++)
                {
                        if (i == s) continue;

-                       if (!session[s].opened) continue;
+                       if (!session[s].opened) break;
+                       // Allow duplicate sessions for multilink ones of the same bundle.
+                       if (session[s].bundle && session[i].bundle && session[s].bundle == session[i].bundle) continue;
+

                        if (ip == session[i].ip)
                        {
                                sessionkill(i, "Duplicate IP address");
                        if (ip == session[i].ip)
                        {
                                sessionkill(i, "Duplicate IP address");

+                               cluster_listinvert_session(s, i);

                                continue;
                        }
 
                        if (config->allow_duplicate_users) continue;
                        if (session[s].walled_garden || session[i].walled_garden) continue;
                                continue;
                        }
 
                        if (config->allow_duplicate_users) continue;
                        if (session[s].walled_garden || session[i].walled_garden) continue;

+                       // Guest change
+                       int found = 0;
+                       int gu;
+                       for (gu = 0; gu < guest_accounts_num; gu++)
+                       {
+                               if (!strcasecmp(user, guest_users[gu]))
+                               {
+                                       found = 1;
+                                       break;
+                               }
+                       }
+                       if (found) continue;
+
+                       // Drop the new session in case of duplicate sessionss, not the old one.

                        if (!strcasecmp(user, session[i].user))
                                sessionkill(i, "Duplicate session for users");
                }
        }
 
                        if (!strcasecmp(user, session[i].user))
                                sessionkill(i, "Duplicate session for users");
                }
        }
 

+       // no need to set a route for the same IP address of the bundle
+       if (!session[s].bundle || (bundle[session[s].bundle].num_of_links == 1))

        {
        {

-               int routed = 0;
+               int routed = 0;

 
                // Add the route for this session.
                for (r = 0; r < MAXROUTE && session[s].route[r].ip; r++)
                {
 
                // Add the route for this session.
                for (r = 0; r < MAXROUTE && session[s].route[r].ip; r++)
                {

-                       if ((session[s].ip & session[s].route[r].mask) ==
-                           (session[s].route[r].ip & session[s].route[r].mask))
+                       if ((session[s].ip >> (32-session[s].route[r].prefixlen)) ==
+                           (session[s].route[r].ip >> (32-session[s].route[r].prefixlen)))

                                routed++;
 
                                routed++;
 

-                       routeset(s, session[s].route[r].ip, session[s].route[r].mask, 0, 1);
+                       routeset(s, session[s].route[r].ip, session[s].route[r].prefixlen, 0, 1);

                }
 
                // Static IPs need to be routed if not already
                }
 
                // Static IPs need to be routed if not already


@@ -4660,7 +5416,7 @@ int sessionsetup(sessionidt s, tunnelidt t)
        if (session[s].throttle_in || session[s].throttle_out)
                throttle_session(s, session[s].throttle_in, session[s].throttle_out);
 
        if (session[s].throttle_in || session[s].throttle_out)
                throttle_session(s, session[s].throttle_in, session[s].throttle_out);
 

-       session[s].last_packet = time_now;
+       session[s].last_packet = session[s].last_data = time_now;

 
        LOG(2, s, t, "Login by %s at %s from %s (%s)\n", session[s].user,
                fmtaddr(htonl(session[s].ip), 0),
 
        LOG(2, s, t, "Login by %s at %s from %s (%s)\n", session[s].user,
                fmtaddr(htonl(session[s].ip), 0),


@@ -4702,7 +5458,7 @@ int load_session(sessionidt s, sessiont *new)
 
        for (i = 0; !newip && i < MAXROUTE && (session[s].route[i].ip || new->route[i].ip); i++)
                if (new->route[i].ip != session[s].route[i].ip ||
 
        for (i = 0; !newip && i < MAXROUTE && (session[s].route[i].ip || new->route[i].ip); i++)
                if (new->route[i].ip != session[s].route[i].ip ||

-                   new->route[i].mask != session[s].route[i].mask)
+                   new->route[i].prefixlen != session[s].route[i].prefixlen)

                        newip++;
 
        // needs update
                        newip++;
 
        // needs update


@@ -4713,11 +5469,11 @@ int load_session(sessionidt s, sessiont *new)
                // remove old routes...
                for (i = 0; i < MAXROUTE && session[s].route[i].ip; i++)
                {
                // remove old routes...
                for (i = 0; i < MAXROUTE && session[s].route[i].ip; i++)
                {

-                       if ((session[s].ip & session[s].route[i].mask) ==
-                           (session[s].route[i].ip & session[s].route[i].mask))
+                       if ((session[s].ip >> (32-session[s].route[i].prefixlen)) ==
+                           (session[s].route[i].ip >> (32-session[s].route[i].prefixlen)))

                                routed++;
 
                                routed++;
 

-                       routeset(s, session[s].route[i].ip, session[s].route[i].mask, 0, 0);
+                       routeset(s, session[s].route[i].ip, session[s].route[i].prefixlen, 0, 0);

                }
 
                // ...ip
                }
 
                // ...ip


@@ -4736,11 +5492,11 @@ int load_session(sessionidt s, sessiont *new)
                // add new routes...
                for (i = 0; i < MAXROUTE && new->route[i].ip; i++)
                {
                // add new routes...
                for (i = 0; i < MAXROUTE && new->route[i].ip; i++)
                {

-                       if ((new->ip & new->route[i].mask) ==
-                           (new->route[i].ip & new->route[i].mask))
+                       if ((new->ip >> (32-new->route[i].prefixlen)) ==
+                           (new->route[i].ip >> (32-new->route[i].prefixlen)))

                                routed++;
 
                                routed++;
 

-                       routeset(s, new->route[i].ip, new->route[i].mask, 0, 1);
+                       routeset(s, new->route[i].ip, new->route[i].prefixlen, 0, 1);

                }
 
                // ...ip
                }
 
                // ...ip


@@ -4763,13 +5519,13 @@ int load_session(sessionidt s, sessiont *new)
        // check filters
        if (new->filter_in && (new->filter_in > MAXFILTER || !ip_filters[new->filter_in - 1].name[0]))
        {
        // check filters
        if (new->filter_in && (new->filter_in > MAXFILTER || !ip_filters[new->filter_in - 1].name[0]))
        {

-               LOG(2, s, session[s].tunnel, "Dropping invalid input filter %d\n", (int) new->filter_in);
+               LOG(2, s, session[s].tunnel, "Dropping invalid input filter %u\n", (int) new->filter_in);

                new->filter_in = 0;
        }
 
        if (new->filter_out && (new->filter_out > MAXFILTER || !ip_filters[new->filter_out - 1].name[0]))
        {
                new->filter_in = 0;
        }
 
        if (new->filter_out && (new->filter_out > MAXFILTER || !ip_filters[new->filter_out - 1].name[0]))
        {

-               LOG(2, s, session[s].tunnel, "Dropping invalid output filter %d\n", (int) new->filter_out);
+               LOG(2, s, session[s].tunnel, "Dropping invalid output filter %u\n", (int) new->filter_out);

                new->filter_out = 0;
        }
 
                new->filter_out = 0;
        }
 


@@ -5153,7 +5909,7 @@ static tunnelidt new_tunnel()
        {
                if (tunnel[i].state == TUNNELFREE)
                {
        {
                if (tunnel[i].state == TUNNELFREE)
                {

-                       LOG(4, 0, i, "Assigning tunnel ID %d\n", i);
+                       LOG(4, 0, i, "Assigning tunnel ID %u\n", i);

                        if (i > config->cluster_highest_tunnelid)
                                config->cluster_highest_tunnelid = i;
                        return i;
                        if (i > config->cluster_highest_tunnelid)
                                config->cluster_highest_tunnelid = i;
                        return i;


@@ -5223,7 +5979,7 @@ int cmd_show_hist_idle(struct cli_def *cli, char *command, char **argv, int argc
                if (!session[s].opened)
                        continue;
 
                if (!session[s].opened)
                        continue;
 

-               idle = time_now - session[s].last_packet;
+               idle = time_now - session[s].last_data;

                idle /= 5 ; // In multiples of 5 seconds.
                if (idle < 0)
                        idle = 0;
                idle /= 5 ; // In multiples of 5 seconds.
                if (idle < 0)
                        idle = 0;


@@ -5468,3 +6224,52 @@ int ip_filter(uint8_t *buf, int len, uint8_t filter)
        // default deny
        return 0;
 }
        // default deny
        return 0;
 }

+
+#ifdef LAC
+
+tunnelidt lac_new_tunnel()
+{
+       return new_tunnel();
+}
+
+void lac_tunnelclear(tunnelidt t)
+{
+       tunnelclear(t);
+}
+
+void lac_send_SCCRQ(tunnelidt t, uint8_t * auth, unsigned int auth_len)
+{
+       uint16_t version = 0x0100;      // protocol version
+
+       tunnel[t].state = TUNNELOPENING;
+
+       // Sent SCCRQ - Start Control Connection Request
+       controlt *c = controlnew(1); // sending SCCRQ
+       controls(c, 7, hostname, 1); // host name
+       controls(c, 8, Vendor_name, 1); // Vendor name
+       control16(c, 2, version, 1); // protocol version
+       control32(c, 3, 3, 1); // framing Capabilities
+       control16(c, 9, t, 1); // assigned tunnel
+       controlb(c, 11, (uint8_t *) auth, auth_len, 1);  // CHAP Challenge
+       LOG(1, 0, t, "Sent SCCRQ tunnel (REMOTE LNS)\n");
+       controladd(c, 0, t); // send
+}
+
+void lac_send_ICRQ(tunnelidt t, sessionidt s)
+{
+       // Sent ICRQ  Incoming-call-request
+       controlt *c = controlnew(10); // ICRQ
+
+       control16(c, 14, s, 1); // assigned sesion
+       call_serial_number++;
+       control32(c, 15, call_serial_number, 1);  // call serial number
+       LOG(1, s, t, "Sent ICRQ (REMOTE LNS) (tunnel far ID %u)\n", tunnel[t].far);
+       controladd(c, 0, t); // send
+}
+
+void lac_tunnelshutdown(tunnelidt t, char *reason, int result, int error, char *msg)
+{
+       tunnelshutdown(t, reason, result, error, msg);
+}
+
+#endif