Further netlink implementation. Not working yet.

[l2tpns.git] / l2tpns.c

diff --git a/l2tpns.c b/l2tpns.c
index 80290dd..8230945 100644 (file)
--- a/l2tpns.c
+++ b/l2tpns.c
@@ -1,10 +1,10 @@
 // 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 1.133 2005/09/16 05:04:29 bodea Exp $";
+char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.176 2011/01/20 12:48:40 bodea Exp $";

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


@@ -39,6 +39,8 @@ char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.133 2005/09/16 05:04:29 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"


@@ -56,6 +58,7 @@ char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.133 2005/09/16 05:04:29 bodea Exp
 
 // 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 +66,19 @@ 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
 char hostname[1000] = "";      // us.
 static int tunidx;             // ifr_ifindex of tun device
 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.
 static int tunidx;             // ifr_ifindex of tun device

+int nlseqnum = 0;              // netlink sequence number

 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 +87,13 @@ 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.
 


@@ -96,7 +105,9 @@ 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 char time_now_string[64] = {0}; // Current time as a string.
 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 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.
 char main_quit = 0;                    // True if we're in the process of exiting.

+static char main_reload = 0;           // Re-load pending

 linked_list *loaded_plugins;
 linked_list *plugins[MAX_PLUGIN_TYPES];
 
 linked_list *loaded_plugins;
 linked_list *plugins[MAX_PLUGIN_TYPES];
 


@@ -124,14 +135,17 @@ 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),


@@ -160,6 +174,7 @@ static char *plugin_functions[] = {
        "plugin_control",
        "plugin_radius_response",
        "plugin_radius_reset",
        "plugin_control",
        "plugin_radius_response",
        "plugin_radius_reset",

+       "plugin_radius_account",

        "plugin_become_master",
        "plugin_new_session_master",
 };
        "plugin_become_master",
        "plugin_new_session_master",
 };


@@ -171,6 +186,8 @@ 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.


@@ -182,13 +199,12 @@ 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 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);

-static void sigalrm_handler(int sig);

 static void shutdown_handler(int sig);
 static void sigchild_handler(int sig);
 static void build_chap_response(uint8_t *challenge, uint8_t id, uint16_t challenge_length, uint8_t **challenge_response);
 static void shutdown_handler(int sig);
 static void sigchild_handler(int sig);
 static void build_chap_response(uint8_t *challenge, uint8_t id, uint16_t challenge_length, uint8_t **challenge_response);


@@ -198,9 +214,10 @@ static void initplugins(void);
 static int add_plugin(char *plugin_name);
 static int remove_plugin(char *plugin_name);
 static void plugins_done(void);
 static int add_plugin(char *plugin_name);
 static int remove_plugin(char *plugin_name);
 static void plugins_done(void);

-static void processcontrol(uint8_t *buf, int len, struct sockaddr_in *addr, int alen);
+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 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 bundleclear(bundleidt b);

 
 // on slaves, alow BGP to withdraw cleanly before exiting
 #define QUIT_DELAY     5
 
 // on slaves, alow BGP to withdraw cleanly before exiting
 #define QUIT_DELAY     5


@@ -210,11 +227,17 @@ static void unhide_value(uint8_t *value, size_t len, uint16_t type, uint8_t *vec
 #define QUIT_SHUTDOWN  2 // SIGQUIT: shutdown sessions/tunnels, reject new connections
 
 // return internal time (10ths since process startup), set f if given
 #define QUIT_SHUTDOWN  2 // SIGQUIT: shutdown sessions/tunnels, reject new connections
 
 // return internal time (10ths since process startup), set f if given

+// as a side-effect sets time_now, and time_changed

 static clockt now(double *f)
 {
        struct timeval t;
        gettimeofday(&t, 0);
        if (f) *f = t.tv_sec + t.tv_usec / 1000000.0;
 static clockt now(double *f)
 {
        struct timeval t;
        gettimeofday(&t, 0);
        if (f) *f = t.tv_sec + t.tv_usec / 1000000.0;

+       if (t.tv_sec != time_now)
+       {
+           time_now = t.tv_sec;
+           time_changed++;
+       }

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


@@ -493,21 +516,109 @@ 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, int want_ack)
+{
+       struct sockaddr_nl nladdr;
+       struct iovec iov;
+       struct msghdr msg;
+
+       nh->nlmsg_pid = getpid();
+       nh->nlmsg_seq = ++nlseqnum;
+       if (want_ack)
+               nh->nlmsg_flags |= NLM_F_ACK;
+
+       // 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(char *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);
+}
+
+static ssize_t netlink_check_ack(struct nlmsghdr *ack_nh, int msg_count)
+{
+       ssize_t len;
+       uint32_t seqnum;
+
+       // expect ack
+       for (; NLMSG_OK (ack_nh, len); ack_nh = NLMSG_NEXT (ack_nh, len))
+       {
+               if (ack_nh->nlmsg_type == NLMSG_DONE)
+                       return msg_count != 0 || seqnum != nlseqnum;
+                       // 1 => lost an ack
+
+               if (ack_nh->nlmsg_type == NLMSG_ERROR)
+               {
+                       struct nlmsgerr *errmsg = NLMSG_DATA(ack_nh);
+                       if (errmsg->error)
+                               return errmsg->error; // got an error back
+                       else
+                       {
+                               // ack received
+                               --msg_count;
+                               if (errmsg->msg.nlmsg_seq > seqnum);
+                                       seqnum = errmsg->msg.nlmsg_seq;
+                       }
+               }
+               else
+                       // unknown message
+                       LOG(3, 0, 0, "Got an unknown netlink message: type %d\n", ack_nh->nlmsg_type);
+       }
+
+       return 1; // malformed message?!
+}

 
 //
 // Set up TUN interface
 static void inittun(void)
 {
 
 //
 // Set up TUN interface
 static void inittun(void)
 {

+       struct ifinfomsg ifinfo;

        struct ifreq ifr;
        struct ifreq ifr;

-       struct in6_ifreq ifr6;
-       struct sockaddr_in sin = {0};
+       char buf[4096];
+       struct nlmsghdr resp_nh;
+

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


@@ -528,64 +639,184 @@ static void inittun(void)
        }
        assert(strlen(ifr.ifr_name) < sizeof(config->tundevice));
        strncpy(config->tundevice, ifr.ifr_name, sizeof(config->tundevice) - 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);

 
 

-       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)
-       {
-               LOG(0, 0, 0, "Error setting tun address: %s\n", strerror(errno));
-               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);
-       }
-       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);
+               // get the interface index
+               ssize_t len;
+               struct {
+                       struct nlmsghdr nh;
+                       struct ifinfomsg ifinfo __attribute__ ((aligned(NLMSG_ALIGNTO)));
+                       struct rtattr ifname_rta __attribute__ ((aligned(RTA_ALIGNTO)));
+                       char ifname[IFNAMSIZ];
+               } req;
+
+               req.nh.nlmsg_type = RTM_GETLINK;
+               req.nh.nlmsg_flags = NLM_F_REQUEST;
+
+               req.ifinfo.ifi_family = AF_UNSPEC; // as the man says
+
+               req.ifname_rta.rta_len = RTA_LENGTH(strlen(config->tundevice)+1);
+               req.ifname_rta.rta_type = IFLA_IFNAME;
+               strncpy(req.ifname, config->tundevice, IFNAMSIZ-1);
+
+               if(netlink_send(&req.nh, 0) < 0 || (len = netlink_recv(buf, sizeof(buf))) < 0)
+               {
+                       LOG(0, 0, 0, "Error getting tun ifindex: %s\n", strerror(errno));
+                       exit(1);
+               }
+
+               resp_nh = (struct nlmsghdr *)buf;
+               if (NLMSG_OK (resp_nh, len) && resp_nh.nlmsg_type == RTM_GETLINK)
+               {
+                       memcpy(&ifinfo, NLMSG_DATA(resp_nh), sizeof(ifinfo));
+                       // got index
+                       tunidx = ifinfo.ifi_index;
+               }
+               else
+               {
+                       LOG(0, 0, 0, "Malformed answer getting tun ifindex\n");
+                       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;
+               ssize_t err;
+               struct {
+                       // interface setting
+                       struct nlmsghdr nh;
+                       struct ifinfomsg ifinfo __attribute__ ((aligned(NLMSG_ALIGNTO)));
+                       struct rtattr txqlen_rta __attribute__ ((aligned(RTA_ALIGNTO)));
+                       uint32_t txqlen;
+                       struct rtattr mtu_rta __attribute__ ((aligned(RTA_ALIGNTO)));
+                       uint32_t mtu;
+
+                       // IPv4 address
+                       struct nlmsghdr addr_nh __attribute __ ((aligned(NLMSG_ALIGNTO)));
+                       struct ifaddrmsg ifaddr __attribute __ ((aligned(NLMSG_ALIGNTO)));
+                       struct rtattr addr_rta __attribute __ ((aligned(RTA_ALIGNTO)));
+                       struct in_addr addr;
+
+                       // IPv6 LL address
+                       struct nlmsghdr lladdr6_nh __attribute __ ((aligned(NLMSG_ALIGNTO)));
+                       struct ifaddrmsg llifaddr6 __attribute __ ((aligned(NLMSG_ALIGNTO)));
+                       struct rtattr lladdr6_rta __attribute __ ((aligned(RTA_ALIGNTO)));
+                       struct in6_addr lladdr6;
+
+                       // IPv6 global address
+                       struct nlmsghdr addr6_nh __attribute __ ((aligned(NLMSG_ALIGNTO)));
+                       struct ifaddrmsg ifaddr6 __attribute __ ((aligned(NLMSG_ALIGNTO)));
+                       struct rtattr addr6_rta __attribute __ ((aligned(RTA_ALIGNTO)));
+                       struct in6_addr addr6;
+
+                       // end header
+                       struct nlmsghdr end_nh __attribute __ ((aligned(NLMSG_ALIGNTO)));
+               } req;
+               char buf[4096];
+
+               memset(&req, 0, sizeof(req));
+
+               req.nh.nlmsg_type = RTM_NEWLINK;
+               req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_MULTI;
+
+               req.ifinfo = ifinfo;
+               req.ifinfo.ifi_flags |= IFF_UP; // set interface up
+               req.ifinfo.ifi_change = IFF_UP; // only change this flag
+
+               req.txqlen_rta.rta_len = RTA_LENGTH(sizeof(req.txqlen));
+               req.txqlen_rta.rta_type = IFLA_TXQLEN;
+               /* Bump up the qlen to deal with bursts from the network */
+               req.txqlen = 1000;
+
+               req.mtu_rta.rta_len = RTA_LENGTH(sizeof(req.txqlen));
+               req.mtu_rta.rta_type = IFLA_MTU;
+               /* set MTU to modem MRU */
+               req.mtu = MRU;
+
+               req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifinfo)
+                               + req.txqlen_rla.rta_len
+                               + req.mtu_rta.rta_len);
+
+               req.addr_nh.nlmsg_type = RTM_NEWADDR;
+               req.addr_nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_MULTI;
+
+               req.ifaddr.ifa_family = AF_INET;
+               req.ifaddr.ifa_prefixlen = 32;
+               req.ifaddr.ifa_index = ifinfo.ifi_index;
+
+               req.addr_rta.rta_len = RTA_LENGTH(sizeof(req.addr));
+               req.addr_rta.rta_type = IFA_ADDRESS;
+               req.addr.s_addr = config->bind_address ?
+                       config->bind_address : 0x01010101; // 1.1.1.1
+
+               req.addr_nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifaddr)
+                               + req.addr_rta.rta_len);
+
+               // Only setup IPv6 on the tun device if we have a configured prefix
+               if (config->ipv6_prefix.s6_addr[0]) {
+                       req.lladdr6_nh.nlmsg_type = RTM_NEWADDR;
+                       req.lladdr6_nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_MULTI;
+
+                       req.llifaddr6.ifa_family = AF_INET6;
+                       req.llifaddr6.ifa_prefixlen = 64;
+                       req.llifaddr6.ifa_scope = RT_SCOPE_LINK;
+                       req.llifaddr6.ifa_index = ifinfo.ifi_index;
+
+                       req.lladdr6_rta.rta_len = RTA_LENGTH(sizeof(req.lladdr6));
+                       req.lladdr6_rta.rta_type = IFA_LOCAL;
+                       // Link local address is FE80::1
+                       memset(&req.lladdr6, 0, sizeof(req.lladdr6));
+                       req.lladdr6.s6_addr[0] = 0xFE;
+                       req.lladdr6.s6_addr[1] = 0x80;
+                       req.lladdr6.s6_addr[15] = 1;
+
+                       req.lladdr6_nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifaddr)
+                                       + req.lladdr6_rta.rta_len);
+
+                       req.addr6_nh.nlmsg_type = RTM_NEWADDR;
+                       req.addr6_nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_MULTI;
+
+                       req.ifaddr6.ifa_family = AF_INET6;
+                       req.ifaddr6.ifa_prefixlen = 64;
+                       req.ifaddr6.ifa_scope = RT_SCOPE_UNIVERSE;
+                       req.ifaddr6.ifa_index = ifinfo.ifi_index;
+
+                       req.addr6_rta.rta_len = RTA_LENGTH(sizeof(req.addr6));
+                       req.addr6_rta.rta_type = IFA_LOCAL;
+                       // Global address is prefix::1
+                       req.addr6 = config->ipv6_prefix;
+                       req.addr6.s6_addr[15] = 1;
+
+                       req.lladdr6_nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifaddr)
+                                       + req.lladdr6_rta.rta_len);
+
+                       req.end_nh.nlmsg_type = NLMSG_DONE;
+                       req.end_nh.nlmsg_len = NLMSG_LENGTH(0);
+               }
+               else
+               {
+                       // we terminate at the beginning of IPv6 stuff
+                       req.lladdr6_nh.nlmsg_type = NLMSG_DONE;
+                       req.lladdr6_nh.nlmsg_len = NLMSG_LENGTH(0);
+               }

 
 

-       // 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);
+               if (netlink_send(&req.nh, 1) < 0)
+                       LOG(0, 0, 0, "Error setting up tun device: %s\n", strerror(errno));
+                       exit(1);
+               }

 
 

-               // 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)
+               if (netlink_recv(buf, sizeof(buf)) < 0)

                {
                {

-                       LOG(0, 0, 0, "Error setting tun IPv6 link local address:"
-                               " %s\n", strerror(errno));
+                       LOG(0, 0, 0, "Error waiting ack for setting up tun device: %s\n", strerror(errno));
+                       exit(1);

                }
 
                }
 

-               // 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)
+               resp_nh = (struct nlmsghdr *)buf;
+               if ((err = netlink_check_ack(resp_nh, 4)))

                {
                {

-                       LOG(0, 0, 0, "Error setting tun IPv6 global address: %s\n",
-                               strerror(errno));
+                       if (err < 0)
+                               LOG(0, 0, 0, "Error while receiving tun device ack: %s\n", strerror(errno));
+                       else
+                               LOG(0, 0, 0, "Error while receiving tun device ack\n", strerror(errno));
+                       exit(1);

                }
        }
 }
                }
        }
 }


@@ -607,7 +838,7 @@ 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);


@@ -619,7 +850,8 @@ static void initudp(void)
        addr.sin_port = htons(NSCTL_PORT);
        controlfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
        setsockopt(controlfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
        addr.sin_port = htons(NSCTL_PORT);
        controlfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
        setsockopt(controlfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));

-       if (bind(controlfd, (void *) &addr, sizeof(addr)) < 0)
+       setsockopt(controlfd, SOL_IP, IP_PKTINFO, &on, sizeof(on)); // recvfromto
+       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);


@@ -631,7 +863,8 @@ static void initudp(void)
        addr.sin_port = htons(config->radius_dae_port);
        daefd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
        setsockopt(daefd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
        addr.sin_port = htons(config->radius_dae_port);
        daefd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
        setsockopt(daefd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));

-       if (bind(daefd, (void *) &addr, sizeof(addr)) < 0)
+       setsockopt(daefd, SOL_IP, IP_PKTINFO, &on, sizeof(on)); // recvfromto
+       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);


@@ -656,19 +889,19 @@ 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;


@@ -696,18 +929,18 @@ 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) ||


@@ -733,25 +966,22 @@ 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));


@@ -766,7 +996,7 @@ 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;


@@ -807,7 +1037,7 @@ 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;
 


@@ -818,24 +1048,28 @@ 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;
                                }
                        }


@@ -925,18 +1159,14 @@ void tunnelsend(uint8_t * buf, uint16_t l, tunnelidt t)
 
        if (!t)
        {
 
        if (!t)
        {

-               static int backtrace_count = 0;

                LOG(0, 0, t, "tunnelsend called with 0 as tunnel id\n");
                STAT(tunnel_tx_errors);
                LOG(0, 0, t, "tunnelsend called with 0 as tunnel id\n");
                STAT(tunnel_tx_errors);

-               log_backtrace(backtrace_count, 5)

                return;
        }
 
        if (!tunnel[t].ip)
        {
                return;
        }
 
        if (!tunnel[t].ip)
        {

-               static int backtrace_count = 0;

                LOG(1, 0, t, "Error sending data out tunnel: no remote endpoint (tunnel not set up)\n");
                LOG(1, 0, t, "Error sending data out tunnel: no remote endpoint (tunnel not set up)\n");

-               log_backtrace(backtrace_count, 5)

                STAT(tunnel_tx_errors);
                return;
        }
                STAT(tunnel_tx_errors);
                return;
        }


@@ -954,7 +1184,7 @@ void tunnelsend(uint8_t * buf, uint16_t l, tunnelidt t)
        {
                tunnel[t].last = time_now; // control message sent
                tunnel[t].retry = backoff(tunnel[t].try); // when to resend
        {
                tunnel[t].last = time_now; // control message sent
                tunnel[t].retry = backoff(tunnel[t].try); // when to resend

-               if (tunnel[t].try > 1)
+               if (tunnel[t].try)

                {
                        STAT(tunnel_retries);
                        LOG(3, 0, t, "Control message resend try %d\n", tunnel[t].try);
                {
                        STAT(tunnel_retries);
                        LOG(3, 0, t, "Control message resend try %d\n", tunnel[t].try);


@@ -988,7 +1218,10 @@ void adjust_tcp_mss(sessionidt s, tunnelidt t, uint8_t *buf, int len, uint8_t *t
 {
        int d = (tcp[12] >> 4) * 4;
        uint8_t *mss = 0;
 {
        int d = (tcp[12] >> 4) * 4;
        uint8_t *mss = 0;

+       uint8_t *opts;

        uint8_t *data;
        uint8_t *data;

+       uint16_t orig;
+       uint32_t sum;

 
        if ((tcp[13] & 0x3f) & ~(TCP_FLAG_SYN|TCP_FLAG_ACK)) // only want SYN and SYN,ACK
                return;
 
        if ((tcp[13] & 0x3f) & ~(TCP_FLAG_SYN|TCP_FLAG_ACK)) // only want SYN and SYN,ACK
                return;


@@ -996,35 +1229,111 @@ void adjust_tcp_mss(sessionidt s, tunnelidt t, uint8_t *buf, int len, uint8_t *t
        if (tcp + d > buf + len) // short?
                return;
 
        if (tcp + d > buf + len) // short?
                return;
 

+       opts = tcp + 20;

        data = tcp + d;
        data = tcp + d;

-       tcp += 20;

 
 

-       while (tcp < data)
+       while (opts < data)

        {
        {

-               if (*tcp == 2 && tcp[1] == 4) // mss option (2), length 4
+               if (*opts == 2 && opts[1] == 4) // mss option (2), length 4

                {
                {

-                       mss = tcp + 2;
+                       mss = opts + 2;

                        if (mss + 2 > data) return; // short?
                        break;
                }
 
                        if (mss + 2 > data) return; // short?
                        break;
                }
 

-               if (*tcp == 0) return; // end of options
-               if (*tcp == 1 || !tcp[1]) // no op (one byte), or no length (prevent loop)
-                       tcp++;
+               if (*opts == 0) return; // end of options
+               if (*opts == 1 || !opts[1]) // no op (one byte), or no length (prevent loop)
+                       opts++;

                else
                else

-                       tcp += tcp[1]; // skip over option
+                       opts += opts[1]; // skip over option

        }
 
        if (!mss) return; // not found
        }
 
        if (!mss) return; // not found

-       if (ntohl(*(uint16_t *) mss) <= MSS) return; // mss OK
+       orig = ntohs(*(uint16_t *) mss);
+
+       if (orig <= MSS) return; // mss OK
+
+       LOG(5, s, t, "TCP: %s:%u -> %s:%u SYN%s: adjusted mss from %u to %u\n",
+               fmtaddr(*(in_addr_t *) (buf + 12), 0), ntohs(*(uint16_t *) tcp),
+               fmtaddr(*(in_addr_t *) (buf + 16), 1), ntohs(*(uint16_t *) (tcp + 2)),
+               (tcp[13] & TCP_FLAG_ACK) ? ",ACK" : "", orig, MSS);
+
+       // set mss
+       *(int16_t *) mss = htons(MSS);
+
+       // adjust checksum (see rfc1141)
+       sum = orig + (~MSS & 0xffff);
+       sum += ntohs(*(uint16_t *) (tcp + 16));
+       sum = (sum & 0xffff) + (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);
+        }
+}

 
 

-       LOG(5, s, t, "TCP: %s:%u -> %s:%u SYN%s, adjusted mss from %u to %u\n",
-               fmtaddr(*(in_addr_t *)(buf + 12), 0), *(uint16_t *)tcp,
-               fmtaddr(*(in_addr_t *)(buf + 16), 1), *(uint16_t *)(tcp + 2),
-               (tcp[13] & TCP_FLAG_ACK) ? ",ACK" : "",
-               ntohl(*(uint16_t *) mss), MSS);
+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;

 
 

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

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


@@ -1039,7 +1348,7 @@ 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);
 


@@ -1088,7 +1397,14 @@ 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


@@ -1151,33 +1467,89 @@ static void processipout(uint8_t *buf, int len)
                        master_throttle_packet(sp->tbf_out, data, size);
                return;
        }
                        master_throttle_packet(sp->tbf_out, data, size);
                return;
        }

-       else if (sp->walled_garden && !config->cluster_iam_master)
+
+       if (sp->walled_garden && !config->cluster_iam_master)

        {
                // We are walled-gardening this
                master_garden_packet(s, data, size);
                return;
        }
 
        {
                // We are walled-gardening this
                master_garden_packet(s, data, size);
                return;
        }
 

-       LOG(5, s, t, "Ethernet -> Tunnel (%d bytes)\n", len);
-

        // Add on L2TP header
        // Add on L2TP header

-       {
-               uint8_t *p = makeppp(b, sizeof(b), buf, len, s, t, PPPIP);
-               if (!p) return;
-               tunnelsend(b, len + (p-b), t); // send it...
-       }
+        {
+                bundleidt bid = 0;
+                if(session[s].bundle != 0 && bundle[session[s].bundle].num_of_links > 1)
+                {
+                        bid = session[s].bundle;
+                        s = bundle[bid].members[bundle[bid].current_ses = ++bundle[bid].current_ses % bundle[bid].num_of_links];
+                       t = session[s].tunnel;
+                       sp = &session[s];
+                        LOG(4, s, t, "MPPP: (1)Session number becomes: %d\n", s);
+                        if(len > MINFRAGLEN)
+                        {
+                                // Partition the packet to "bundle[b].num_of_links" fragments
+                               bundlet *b = &bundle[bid];
+                               uint32_t num_of_links = b->num_of_links;
+                                uint32_t fraglen = len / num_of_links;
+                               fraglen = (fraglen > session[s].mru ? session[s].mru : fraglen);
+                               uint32_t last_fraglen = fraglen + len % num_of_links;
+                               last_fraglen = (last_fraglen > session[s].mru ? len % num_of_links : last_fraglen);
+                               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)
+                               { 
+                                       s = b->members[b->current_ses = ++b->current_ses % num_of_links];
+                                       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
+                               s = b->members[b->current_ses = ++b->current_ses % num_of_links];
+                               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
+                {
+                        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);
+                }
+        }

 
        // 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


@@ -1248,8 +1620,15 @@ 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;
+               s = bundle[bid].members[bundle[bid].current_ses = ++bundle[bid].current_ses % bundle[bid].num_of_links];
+               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?
 


@@ -1273,7 +1652,7 @@ 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...
        }


@@ -1325,7 +1704,7 @@ 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...
        }


@@ -1534,10 +1913,12 @@ void filter_session(sessionidt s, int filter_in, int filter_out)
 }
 
 // start tidy shutdown of session
 }
 
 // start tidy shutdown of session

-void sessionshutdown(sessionidt s, char *reason, int result, int error)
+void sessionshutdown(sessionidt s, char const *reason, int cdn_result, int cdn_error, int term_cause)

 {
        int walled_garden = session[s].walled_garden;
 {
        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);
 


@@ -1550,8 +1931,9 @@ void sessionshutdown(sessionidt s, char *reason, int result, int error)
        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)


@@ -1562,7 +1944,11 @@ void sessionshutdown(sessionidt s, char *reason, int result, int error)
                {
                        // stop, if not already trying
                        if (radius[r].state != RADIUSSTOP)
                {
                        // stop, if not already trying
                        if (radius[r].state != RADIUSSTOP)

+                       {
+                               radius[r].term_cause = term_cause;
+                               radius[r].term_msg = reason;

                                radiussend(r, RADIUSSTOP);
                                radiussend(r, RADIUSSTOP);

+                       }

                }
                else
                        LOG(1, s, session[s].tunnel, "No free RADIUS sessions for Stop message\n");
                }
                else
                        LOG(1, s, session[s].tunnel, "No free RADIUS sessions for Stop message\n");


@@ -1582,46 +1968,74 @@ void sessionshutdown(sessionidt s, char *reason, int result, int error)
                            (session[s].route[r].ip & session[s].route[r].mask))
                                routed++;
 
                            (session[s].route[r].ip & session[s].route[r].mask))
                                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].mask, 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, 0, "MPPP: Dropping member link: %d from bundle %d\n",s,b);
+                       if(bundle[b].num_of_links == 0) 
+                       {
+                               bundleclear(b);
+                               LOG(3, s, 0, "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, 0, "MPPP: Adjusted member links array\n");
+                               }
+                       }
+                       cluster_send_bundle(b);
+               }

        }
 
        if (session[s].throttle_in || session[s].throttle_out) // Unthrottle if throttled.
                throttle_session(s, 0, 0);
 
        }
 
        if (session[s].throttle_in || session[s].throttle_out) // Unthrottle if throttled.
                throttle_session(s, 0, 0);
 

-       if (result)
+       if (cdn_result)

        {                            // Send CDN
                controlt *c = controlnew(14); // sending CDN
        {                            // Send CDN
                controlt *c = controlnew(14); // sending CDN

-               if (error)
+               if (cdn_error)

                {
                        uint8_t buf[4];
                {
                        uint8_t buf[4];

-                       *(uint16_t *) buf     = htons(result);
-                       *(uint16_t *) (buf+2) = htons(error);
+                       *(uint16_t *) buf     = htons(cdn_result);
+                       *(uint16_t *) (buf+2) = htons(cdn_error);

                        controlb(c, 1, buf, 4, 1);
                }
                else
                        controlb(c, 1, buf, 4, 1);
                }
                else

-                       control16(c, 1, result, 1);
+                       control16(c, 1, cdn_result, 1);

 
                control16(c, 14, s, 1);   // assigned session (our end)
                controladd(c, session[s].far, session[s].tunnel); // send the message
        }
 
 
                control16(c, 14, s, 1);   // assigned session (our end)
                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--;


@@ -1650,7 +2064,7 @@ 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;


@@ -1663,6 +2077,7 @@ void sendipcp(sessionidt s, tunnelidt t)
                                 my_address; // send my IP
 
        tunnelsend(buf, 10 + (q - buf), t); // send it
                                 my_address; // send my IP
 
        tunnelsend(buf, 10 + (q - buf), t); // send it

+       restart_timer(s, ipcp);

 }
 
 void sendipv6cp(sessionidt s, tunnelidt t)
 }
 
 void sendipv6cp(sessionidt s, tunnelidt t)


@@ -1673,7 +2088,7 @@ 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;


@@ -1688,6 +2103,7 @@ void sendipv6cp(sessionidt s, tunnelidt t)
        q[13] = 1;
 
        tunnelsend(buf, 14 + (q - buf), t);     // send it
        q[13] = 1;
 
        tunnelsend(buf, 14 + (q - buf), t);     // send it

+       restart_timer(s, ipv6cp);

 }
 
 static void sessionclear(sessionidt s)
 }
 
 static void sessionclear(sessionidt s)


@@ -1704,7 +2120,6 @@ 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


@@ -1712,12 +2127,13 @@ 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, 3, 0);  // 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
 


@@ -1733,6 +2149,13 @@ 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)
 {


@@ -1759,7 +2182,7 @@ 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);
 }


@@ -1777,12 +2200,12 @@ 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)
                if (session[s].tunnel == t)
 
        // close session
        for (s = 1; s <= config->cluster_highest_sessionid ; ++s)
                if (session[s].tunnel == t)

-                       sessionshutdown(s, reason, 0, 0);
+                       sessionshutdown(s, reason, CDN_NONE, TERM_ADMIN_RESET);

 
        tunnel[t].state = TUNNELDIE;
        tunnel[t].die = TIME + 700; // Clean up in 70 seconds
 
        tunnel[t].state = TUNNELDIE;
        tunnel[t].die = TIME + 700; // Clean up in 70 seconds


@@ -1840,7 +2263,7 @@ 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;
        }


@@ -1937,7 +2360,7 @@ 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


@@ -1954,7 +2377,7 @@ 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);
                }
 


@@ -1968,7 +2391,7 @@ 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?


@@ -2021,6 +2444,13 @@ 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 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).";
+

                        // process AVPs
                        while (l && !(fatal & 0x80)) // 0x80 = mandatory AVP
                        {
                        // process AVPs
                        while (l && !(fatal & 0x80)) // 0x80 = mandatory AVP
                        {


@@ -2028,6 +2458,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                uint8_t *b = p;
                                uint8_t flags = *p;
                                uint16_t mtype;
                                uint8_t *b = p;
                                uint8_t flags = *p;
                                uint16_t mtype;

+

                                if (n > l)
                                {
                                        LOG(1, s, t, "Invalid length in AVP\n");
                                if (n > l)
                                {
                                        LOG(1, s, t, "Invalid length in AVP\n");


@@ -2048,7 +2479,7 @@ 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


@@ -2113,7 +2544,7 @@ 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)


@@ -2121,37 +2552,53 @@ 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", *b, 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);


@@ -2164,17 +2611,13 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                        }
                                        break;
                                case 3:     // framing capabilities
                                        }
                                        break;
                                case 3:     // framing capabilities

-//                                     LOG(4, s, t, "Framing capabilities\n");

                                        break;
                                case 4:     // bearer capabilities
                                        break;
                                case 4:     // bearer capabilities

-//                                     LOG(4, s, t, "Bearer capabilities\n");

                                        break;
                                case 5:         // tie breaker
                                        // We never open tunnels, so we don't care about tie breakers
                                        break;
                                case 5:         // tie breaker
                                        // We never open tunnels, so we don't care about tie breakers

-//                                     LOG(4, s, t, "Tie breaker\n");

                                        continue;
                                case 6:     // firmware revision
                                        continue;
                                case 6:     // firmware revision

-//                                     LOG(4, s, t, "Firmware revision\n");

                                        break;
                                case 7:     // host name
                                        memset(tunnel[t].hostname, 0, sizeof(tunnel[t].hostname));
                                        break;
                                case 7:     // host name
                                        memset(tunnel[t].hostname, 0, sizeof(tunnel[t].hostname));


@@ -2189,13 +2632,13 @@ 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
                                        {


@@ -2210,17 +2653,17 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 
                                case 14:    // assigned session
                                        asession = session[s].far = ntohs(*(uint16_t *) (b));
 
                                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


@@ -2274,7 +2717,7 @@ 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


@@ -2294,7 +2737,7 @@ 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


@@ -2308,9 +2751,9 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                                        if (*p == 5 && p[1] == 6) // Magic-Number
                                                                amagic = ntohl(*(uint32_t *) (p + 2));
                                                        else if (*p == 7) // Protocol-Field-Compression
                                                        if (*p == 5 && p[1] == 6) // Magic-Number
                                                                amagic = ntohl(*(uint32_t *) (p + 2));
                                                        else if (*p == 7) // Protocol-Field-Compression

-                                                               aflags |= SESSIONPFC;
+                                                               aflags |= SESSION_PFC;

                                                        else if (*p == 8) // Address-and-Control-Field-Compression
                                                        else if (*p == 8) // Address-and-Control-Field-Compression

-                                                               aflags |= SESSIONACFC;
+                                                               aflags |= SESSION_ACFC;

                                                        p += p[1];
                                                }
                                        }
                                                        p += p[1];
                                                }
                                        }


@@ -2329,10 +2772,90 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                        memcpy(session[s].random_vector, b, n);
                                        session[s].random_vector_length = n;
                                        break;
                                        memcpy(session[s].random_vector, b, n);
                                        session[s].random_vector_length = n;
                                        break;

+                               case 46:    // ppp disconnect cause
+                                       if (n >= 5)
+                                       {
+                                               uint16_t code = ntohs(*(uint16_t *) b);
+                                               uint16_t proto = ntohs(*(uint16_t *) (b + 2));
+                                               uint8_t dir = *(b + 4);
+
+                                               LOG(4, s, t, "   PPP disconnect cause "
+                                                       "(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
+                                                       disc_cause = TERM_ADMIN_RESET;
+                                                       disc_reason = "Administrative disconnect";
+                                                       break;
+                                               case 3: // lcp terminate
+                                                       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
+                                                       if (dir != 1) break; // 1=refused by peer, 2=local
+                                                       disc_cause = TERM_USER_ERROR;
+                                                       disc_reason = "Compulsory encryption refused";
+                                                       break;
+                                               case 5: // lcp: fsm timeout
+                                                       disc_cause = TERM_PORT_ERROR;
+                                                       disc_reason = "LCP: FSM timeout";
+                                                       break;
+                                               case 6: // lcp: no recognisable lcp packets received
+                                                       disc_cause = TERM_PORT_ERROR;
+                                                       disc_reason = "LCP: no recognisable LCP packets";
+                                                       break;
+                                               case 7: // lcp: magic-no error (possibly looped back)
+                                                       disc_cause = TERM_PORT_ERROR;
+                                                       disc_reason = "LCP: magic-no error (possible loop)";
+                                                       break;
+                                               case 8: // lcp: echo request timeout
+                                                       disc_cause = TERM_PORT_ERROR;
+                                                       disc_reason = "LCP: echo request timeout";
+                                                       break;
+                                               case 13: // auth: fsm timeout
+                                                       disc_cause = TERM_SERVICE_UNAVAILABLE;
+                                                       disc_reason = "Authentication: FSM timeout";
+                                                       break;
+                                               case 15: // auth: unacceptable auth protocol
+                                                       disc_cause = TERM_SERVICE_UNAVAILABLE;
+                                                       disc_reason = "Unacceptable authentication protocol";
+                                                       break;
+                                               case 16: // auth: authentication failed
+                                                       disc_cause = TERM_SERVICE_UNAVAILABLE;
+                                                       disc_reason = "Authentication failed";
+                                                       break;
+                                               case 17: // ncp: fsm timeout
+                                                       disc_cause = TERM_SERVICE_UNAVAILABLE;
+                                                       disc_reason = "NCP: FSM timeout";
+                                                       break;
+                                               case 18: // ncp: no ncps available
+                                                       disc_cause = TERM_SERVICE_UNAVAILABLE;
+                                                       disc_reason = "NCP: no NCPs available";
+                                                       break;
+                                               case 19: // ncp: failure to converge on acceptable address
+                                                       disc_cause = TERM_SERVICE_UNAVAILABLE;
+                                                       disc_reason = (dir == 1)
+                                                               ? "NCP: too many Configure-Naks received from peer"
+                                                               : "NCP: too many Configure-Naks sent to peer";
+                                                       break;
+                                               case 20: // ncp: user not permitted to use any address
+                                                       disc_cause = TERM_SERVICE_UNAVAILABLE;
+                                                       disc_reason = (dir == 1)
+                                                               ? "NCP: local link address not acceptable to peer"
+                                                               : "NCP: remote link address not acceptable";
+                                                       break;
+                                               }
+                                       }
+                                       break;

                                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


@@ -2366,9 +2889,11 @@ 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;

                                        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


@@ -2402,8 +2927,8 @@ 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
 


@@ -2437,23 +2962,25 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                case 12:      // ICCN
                                        if (amagic == 0) amagic = time_now;
                                        session[s].magic = amagic; // set magic number
                                case 12:      // ICCN
                                        if (amagic == 0) amagic = time_now;
                                        session[s].magic = amagic; // set magic number

-                                       session[s].l2tp_flags = aflags; // set flags received
-                                       session[s].mru = PPPMTU; // default
+                                       session[s].flags = aflags; // set flags received
+                                       session[s].mru = PPPoE_MRU; // default

                                        controlnull(t); // ack
 
                                        // start LCP
                                        controlnull(t); // ack
 
                                        // start LCP

-                                       sess_local[s].lcp.restart = time_now + config->ppp_restart_time;
-                                       sess_local[s].lcp.conf_sent = 1;
-                                       sess_local[s].lcp.nak_sent = 0;

                                        sess_local[s].lcp_authtype = config->radius_authprefer;
                                        sess_local[s].ppp_mru = MRU;
                                        sess_local[s].lcp_authtype = config->radius_authprefer;
                                        sess_local[s].ppp_mru = MRU;

-                                       session[s].ppp.lcp = RequestSent;
-                                       sendlcp(s, t);

 
 

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

                                        break;
                                        break;

+

                                case 14:      // CDN
                                        controlnull(t); // ack
                                case 14:      // CDN
                                        controlnull(t); // ack

-                                       sessionshutdown(s, "Closed (Received CDN).", 0, 0);
+                                       sessionshutdown(s, disc_reason, CDN_NONE, disc_cause);

                                        break;
                                case 0xFFFF:
                                        LOG(1, s, t, "Missing message type\n");
                                        break;
                                case 0xFFFF:
                                        LOG(1, s, t, "Missing message type\n");


@@ -2463,7 +2990,7 @@ 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);


@@ -2557,11 +3084,11 @@ 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);


@@ -2570,15 +3097,32 @@ 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 (session[s].walled_garden && !config->cluster_iam_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);


@@ -2589,29 +3133,9 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                }
                else if (session[s].ppp.lcp == Opened)
                {
                }
                else if (session[s].ppp.lcp == Opened)
                {

-                       uint8_t buf[MAXETHER];
-                       uint8_t *q;
-                       int mru = session[s].mru;
-                       if (mru > sizeof(buf)) mru = sizeof(buf);
-
-                       l += 6;
-                       if (l > mru) l = mru;
-
-                       q = makeppp(buf, sizeof(buf), 0, 0, s, t, proto);
-                       if (!q) return;
-
-                       *q = CodeRej;
-                       *(q + 1) = ++sess_local[s].lcp_ident;
-                       *(uint16_t *)(q + 2) = l;
-                       *(uint16_t *)(q + 4) = htons(proto);
-                       memcpy(q + 6, p, l - 6);
-
-                       if (proto == PPPIPV6CP)
-                               LOG(3, s, t, "LCP: send ProtocolRej (IPV6CP: not configured)\n");
-                       else
-                               LOG(2, s, t, "LCP: sent ProtocolRej (0x%04X: unsupported)\n", proto);
-
-                       tunnelsend(buf, l + (q - buf), t);
+                       session[s].last_packet = time_now;
+                       if (!config->cluster_iam_master) { master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port); return; }
+                       protoreject(s, t, p, l, proto);

                }
                else
                {
                }
                else
                {


@@ -2712,7 +3236,7 @@ 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


@@ -2727,7 +3251,7 @@ static void regular_cleanups(double period)
                        }
                }
                // Send hello
                        }
                }
                // Send hello

-               if (tunnel[t].state == TUNNELOPEN && (time_now - tunnel[t].lastrec) > 60)
+               if (tunnel[t].state == TUNNELOPEN && !tunnel[t].controlc && (time_now - tunnel[t].lastrec) > 60)

                {
                        controlt *c = controlnew(6); // sending HELLO
                        controladd(c, 0, t); // send the message
                {
                        controlt *c = controlnew(6); // sending HELLO
                        controladd(c, 0, t); // send the message


@@ -2798,14 +3322,12 @@ static void regular_cleanups(double period)
                                if (sess_local[s].lcp.conf_sent < config->ppp_max_configure)
                                {
                                        LOG(3, s, session[s].tunnel, "No ACK for LCP ConfigReq... resending\n");
                                if (sess_local[s].lcp.conf_sent < config->ppp_max_configure)
                                {
                                        LOG(3, s, session[s].tunnel, "No ACK for LCP ConfigReq... resending\n");

-                                       sess_local[s].lcp.restart = time_now + config->ppp_restart_time;
-                                       sess_local[s].lcp.conf_sent++;

                                        sendlcp(s, session[s].tunnel);
                                        change_state(s, lcp, next_state);
                                }
                                else
                                {
                                        sendlcp(s, session[s].tunnel);
                                        change_state(s, lcp, next_state);
                                }
                                else
                                {

-                                       sessionshutdown(s, "No response to LCP ConfigReq.", 3, 0);
+                                       sessionshutdown(s, "No response to LCP ConfigReq.", CDN_ADMIN_DISC, TERM_LOST_SERVICE);

                                        STAT(session_timeout);
                                }
 
                                        STAT(session_timeout);
                                }
 


@@ -2829,14 +3351,12 @@ static void regular_cleanups(double period)
                                if (sess_local[s].ipcp.conf_sent < config->ppp_max_configure)
                                {
                                        LOG(3, s, session[s].tunnel, "No ACK for IPCP ConfigReq... resending\n");
                                if (sess_local[s].ipcp.conf_sent < config->ppp_max_configure)
                                {
                                        LOG(3, s, session[s].tunnel, "No ACK for IPCP ConfigReq... resending\n");

-                                       sess_local[s].ipcp.restart = time_now + config->ppp_restart_time;
-                                       sess_local[s].ipcp.conf_sent++;

                                        sendipcp(s, session[s].tunnel);
                                        change_state(s, ipcp, next_state);
                                }
                                else
                                {
                                        sendipcp(s, session[s].tunnel);
                                        change_state(s, ipcp, next_state);
                                }
                                else
                                {

-                                       sessionshutdown(s, "No response to IPCP ConfigReq.", 3, 0);
+                                       sessionshutdown(s, "No response to IPCP ConfigReq.", CDN_ADMIN_DISC, TERM_LOST_SERVICE);

                                        STAT(session_timeout);
                                }
 
                                        STAT(session_timeout);
                                }
 


@@ -2860,8 +3380,6 @@ static void regular_cleanups(double period)
                                if (sess_local[s].ipv6cp.conf_sent < config->ppp_max_configure)
                                {
                                        LOG(3, s, session[s].tunnel, "No ACK for IPV6CP ConfigReq... resending\n");
                                if (sess_local[s].ipv6cp.conf_sent < config->ppp_max_configure)
                                {
                                        LOG(3, s, session[s].tunnel, "No ACK for IPV6CP ConfigReq... resending\n");

-                                       sess_local[s].ipv6cp.restart = time_now + config->ppp_restart_time;
-                                       sess_local[s].ipv6cp.conf_sent++;

                                        sendipv6cp(s, session[s].tunnel);
                                        change_state(s, ipv6cp, next_state);
                                }
                                        sendipv6cp(s, session[s].tunnel);
                                        change_state(s, ipv6cp, next_state);
                                }


@@ -2888,8 +3406,6 @@ static void regular_cleanups(double period)
                                if (sess_local[s].ccp.conf_sent < config->ppp_max_configure)
                                {
                                        LOG(3, s, session[s].tunnel, "No ACK for CCP ConfigReq... resending\n");
                                if (sess_local[s].ccp.conf_sent < config->ppp_max_configure)
                                {
                                        LOG(3, s, session[s].tunnel, "No ACK for CCP ConfigReq... resending\n");

-                                       sess_local[s].ccp.restart = time_now + config->ppp_restart_time;
-                                       sess_local[s].ccp.conf_sent++;

                                        sendccp(s, session[s].tunnel);
                                        change_state(s, ccp, next_state);
                                }
                                        sendccp(s, session[s].tunnel);
                                        change_state(s, ccp, next_state);
                                }


@@ -2906,29 +3422,70 @@ 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_TIMEOUT seconds
                if (session[s].last_packet && (time_now - session[s].last_packet >= IDLE_TIMEOUT))
                {

-                       sessionshutdown(s, "No response to LCP ECHO requests.", 3, 0);
+                       sessionshutdown(s, "No response to LCP ECHO requests.", CDN_ADMIN_DISC, TERM_LOST_SERVICE);

                        STAT(session_timeout);
                        s_actions++;
                        continue;
                }
 
                // No data in ECHO_TIMEOUT seconds, send LCP ECHO
                        STAT(session_timeout);
                        s_actions++;
                        continue;
                }
 
                // 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 >= ECHO_TIMEOUT) &&
+                       (time_now - sess_local[s].last_echo >= ECHO_TIMEOUT))

                {
                        uint8_t b[MAXETHER];
 
                {
                        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;
                        *(uint8_t *)(q + 1) = (time_now % 255); // ID
                        *(uint16_t *)(q + 2) = htons(8); // Length
                        if (!q) continue;
 
                        *q = EchoReq;
                        *(uint8_t *)(q + 1) = (time_now % 255); // ID
                        *(uint16_t *)(q + 2) = htons(8); // Length

-                       *(uint32_t *)(q + 4) = 0; // Magic Number (not supported)
+                       *(uint32_t *)(q + 4) = session[s].ppp.lcp == Opened ? htonl(session[s].magic) : 0; // Magic Number

 
                        LOG(4, s, session[s].tunnel, "No data in %d seconds, sending LCP ECHO\n",
                                        (int)(time_now - session[s].last_packet));
                        tunnelsend(b, 24, session[s].tunnel); // send it
 
                        LOG(4, s, session[s].tunnel, "No data in %d seconds, sending LCP ECHO\n",
                                        (int)(time_now - session[s].last_packet));
                        tunnelsend(b, 24, session[s].tunnel); // send it

+                       sess_local[s].last_echo = time_now;
+                       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++;
                        s_actions++;

+                       continue;

                }
 
                // Check for actions requested from the CLI
                }
 
                // Check for actions requested from the CLI


@@ -2940,7 +3497,7 @@ static void regular_cleanups(double period)
                        if (a & CLI_SESS_KILL)
                        {
                                LOG(2, s, session[s].tunnel, "Dropping session by CLI\n");
                        if (a & CLI_SESS_KILL)
                        {
                                LOG(2, s, session[s].tunnel, "Dropping session by CLI\n");

-                               sessionshutdown(s, "Requested by administrator.", 3, 0);
+                               sessionshutdown(s, "Requested by administrator.", CDN_ADMIN_DISC, TERM_ADMIN_RESET);

                                a = 0; // dead, no need to check for other actions
                                s_actions++;
                        }
                                a = 0; // dead, no need to check for other actions
                                s_actions++;
                        }


@@ -2955,7 +3512,7 @@ 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);
 


@@ -3009,7 +3566,8 @@ 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)


@@ -3098,7 +3656,7 @@ 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;


@@ -3120,7 +3678,7 @@ 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;


@@ -3172,9 +3730,12 @@ 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++];


@@ -3217,9 +3778,17 @@ static void mainloop(void)
                int more = 0;
                int n;
 
                int more = 0;
                int n;
 

+
+               if (main_reload)
+               {
+                       main_reload = 0;
+                       read_config_file();
+                       config->reload_config++;
+               }
+

                if (config->reload_config)
                {
                if (config->reload_config)
                {

-                       // Update the config state based on config settings
+                       config->reload_config = 0;

                        update_config();
                }
 
                        update_config();
                }
 


@@ -3244,6 +3813,7 @@ static void mainloop(void)
                if (n)
                {
                        struct sockaddr_in addr;
                if (n)
                {
                        struct sockaddr_in addr;

+                       struct in_addr local;

                        socklen_t alen;
                        int c, s;
                        int udp_ready = 0;
                        socklen_t alen;
                        int c, s;
                        int udp_ready = 0;


@@ -3260,6 +3830,7 @@ static void mainloop(void)
                        for (c = n, i = 0; i < c; i++)
                        {
                                struct event_data *d = events[i].data.ptr;
                        for (c = n, i = 0; i < c; i++)
                        {
                                struct event_data *d = events[i].data.ptr;

+

                                switch (d->type)
                                {
                                case FD_TYPE_CLI: // CLI connections
                                switch (d->type)
                                {
                                case FD_TYPE_CLI: // CLI connections


@@ -3286,20 +3857,30 @@ static void mainloop(void)
 
                                case FD_TYPE_CONTROL: // nsctl commands
                                        alen = sizeof(addr);
 
                                case FD_TYPE_CONTROL: // nsctl commands
                                        alen = sizeof(addr);

-                                       processcontrol(buf, recvfrom(controlfd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen), &addr, alen);
+                                       s = recvfromto(controlfd, buf, sizeof(buf), MSG_WAITALL, (struct sockaddr *) &addr, &alen, &local);
+                                       if (s > 0) processcontrol(buf, s, &addr, alen, &local);

                                        n--;
                                        break;
 
                                case FD_TYPE_DAE: // DAE requests
                                        alen = sizeof(addr);
                                        n--;
                                        break;
 
                                case FD_TYPE_DAE: // DAE requests
                                        alen = sizeof(addr);

-                                       processdae(buf, recvfrom(daefd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen), &addr, alen);
+                                       s = recvfromto(daefd, buf, sizeof(buf), MSG_WAITALL, (struct sockaddr *) &addr, &alen, &local);
+                                       if (s > 0) processdae(buf, s, &addr, alen, &local);

                                        n--;
                                        break;
 
                                case FD_TYPE_RADIUS: // RADIUS response
                                        n--;
                                        break;
 
                                case FD_TYPE_RADIUS: // RADIUS response

-                                       s = recv(radfds[d->index], buf, sizeof(buf), 0);
+                                       alen = sizeof(addr);
+                                       s = recvfrom(radfds[d->index], buf, sizeof(buf), MSG_WAITALL, (struct sockaddr *) &addr, &alen);

                                        if (s >= 0 && config->cluster_iam_master)
                                        if (s >= 0 && config->cluster_iam_master)

-                                               processrad(buf, s, d->index);
+                                       {
+                                               if (addr.sin_addr.s_addr == config->radiusserver[0] ||
+                                                   addr.sin_addr.s_addr == config->radiusserver[1])
+                                                       processrad(buf, s, d->index);
+                                               else
+                                                       LOG(3, 0, 0, "Dropping RADIUS packet from unknown source %s\n",
+                                                               fmtaddr(addr.sin_addr.s_addr, 0));
+                                       }

 
                                        n--;
                                        break;
 
                                        n--;
                                        break;


@@ -3383,6 +3964,35 @@ static void mainloop(void)
                        }
                }
 
                        }
                }
 

+               if (time_changed)
+               {
+                       double Mbps = 1024.0 * 1024.0 / 8 * time_changed;
+
+                       // Log current traffic stats
+                       snprintf(config->bandwidth, sizeof(config->bandwidth),
+                               "UDP-ETH:%1.0f/%1.0f  ETH-UDP:%1.0f/%1.0f  TOTAL:%0.1f   IN:%u OUT:%u",
+                               (udp_rx / Mbps), (eth_tx / Mbps), (eth_rx / Mbps), (udp_tx / Mbps),
+                               ((udp_tx + udp_rx + eth_tx + eth_rx) / Mbps),
+                               udp_rx_pkt / time_changed, eth_rx_pkt / time_changed);
+                
+                       udp_tx = udp_rx = 0;
+                       udp_rx_pkt = eth_rx_pkt = 0;
+                       eth_tx = eth_rx = 0;
+                       time_changed = 0;
+                
+                       if (config->dump_speed)
+                               printf("%s\n", config->bandwidth);
+                
+                       // Update the internal time counter
+                       strftime(time_now_string, sizeof(time_now_string), "%Y-%m-%d %H:%M:%S", localtime(&time_now));
+                
+                       {
+                               // Run timer hooks
+                               struct param_timer p = { time_now };
+                               run_plugins(PLUGIN_TIMER, &p);
+                       }
+               }
+

                        // Runs on every machine (master and slaves).
                if (next_cluster_ping <= TIME)
                {
                        // Runs on every machine (master and slaves).
                if (next_cluster_ping <= TIME)
                {


@@ -3556,6 +4166,7 @@ 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);
 
        log_stream = stderr;
        strcpy(config->random_device, RANDOMDEVICE);
 
        log_stream = stderr;


@@ -3579,6 +4190,16 @@ 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));


@@ -3625,6 +4246,7 @@ 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);


@@ -3642,6 +4264,10 @@ 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


@@ -3776,7 +4402,7 @@ 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.


@@ -3785,7 +4411,7 @@ 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;


@@ -3916,7 +4542,7 @@ static void initippool()
                else
                {
                        // It's a single ip address
                else
                {
                        // It's a single ip address

-                       add_to_ip_pool(inet_addr(pool), 0);
+                       add_to_ip_pool(ntohl(inet_addr(pool)), 0);

                }
        }
        fclose(f);
                }
        }
        fclose(f);


@@ -3933,7 +4559,7 @@ 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));
 


@@ -4058,18 +4684,17 @@ int main(int argc, char *argv[])
        // Start the timer routine off
        time(&time_now);
        strftime(time_now_string, sizeof(time_now_string), "%Y-%m-%d %H:%M:%S", localtime(&time_now));
        // Start the timer routine off
        time(&time_now);
        strftime(time_now_string, sizeof(time_now_string), "%Y-%m-%d %H:%M:%S", localtime(&time_now));

-       signal(SIGALRM, sigalrm_handler);
-       siginterrupt(SIGALRM, 0);

 
        initplugins();
        initdata(optdebug, optconfig);
 
        init_cli(hostname);
        read_config_file();
 
        initplugins();
        initdata(optdebug, optconfig);
 
        init_cli(hostname);
        read_config_file();

+       update_config();

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


@@ -4141,12 +4766,6 @@ 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));
        }
 

-       alarm(1);
-
-       // 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) */


@@ -4164,53 +4783,11 @@ int main(int argc, char *argv[])
 
 static void sighup_handler(int sig)
 {
 
 static void sighup_handler(int sig)
 {

-       if (log_stream)
-       {
-               if (log_stream != stderr)
-                       fclose(log_stream);
-
-               log_stream = NULL;
-       }
-
-       read_config_file();
-}
-
-static void sigalrm_handler(int sig)
-{
-       // Log current traffic stats
-
-       snprintf(config->bandwidth, sizeof(config->bandwidth),
-               "UDP-ETH:%1.0f/%1.0f  ETH-UDP:%1.0f/%1.0f  TOTAL:%0.1f   IN:%u OUT:%u",
-               (udp_rx / 1024.0 / 1024.0 * 8),
-               (eth_tx / 1024.0 / 1024.0 * 8),
-               (eth_rx / 1024.0 / 1024.0 * 8),
-               (udp_tx / 1024.0 / 1024.0 * 8),
-               ((udp_tx + udp_rx + eth_tx + eth_rx) / 1024.0 / 1024.0 * 8),
-               udp_rx_pkt, eth_rx_pkt);
-
-       udp_tx = udp_rx = 0;
-       udp_rx_pkt = eth_rx_pkt = 0;
-       eth_tx = eth_rx = 0;
-
-       if (config->dump_speed)
-               printf("%s\n", config->bandwidth);
-
-       // Update the internal time counter
-       time(&time_now);
-       strftime(time_now_string, sizeof(time_now_string), "%Y-%m-%d %H:%M:%S", localtime(&time_now));
-       alarm(1);
-
-       {
-               // Run timer hooks
-               struct param_timer p = { time_now };
-               run_plugins(PLUGIN_TIMER, &p);
-       }
-
+       main_reload++;

 }
 
 static void shutdown_handler(int sig)
 {
 }
 
 static void shutdown_handler(int sig)
 {

-       LOG(1, 0, 0, "Shutting down\n");

        main_quit = (sig == SIGQUIT) ? QUIT_SHUTDOWN : QUIT_FAILOVER;
 }
 
        main_quit = (sig == SIGQUIT) ? QUIT_SHUTDOWN : QUIT_FAILOVER;
 }
 


@@ -4307,12 +4884,15 @@ static void update_config()
 #define L2TP_HDRS              (20+8+6+4)      // L2TP data encaptulation: ip + udp + l2tp (data) + ppp (inc hdlc)
 #define TCP_HDRS               (20+20)         // TCP encapsulation: ip + tcp
 
 #define L2TP_HDRS              (20+8+6+4)      // L2TP data encaptulation: ip + udp + l2tp (data) + ppp (inc hdlc)
 #define TCP_HDRS               (20+20)         // TCP encapsulation: ip + tcp
 

-       if (config->l2tp_mtu <= 0)              config->l2tp_mtu = PPPMTU;
+       if (config->l2tp_mtu <= 0)              config->l2tp_mtu = 1500; // ethernet default

        else if (config->l2tp_mtu < MINMTU)     config->l2tp_mtu = MINMTU;
        else if (config->l2tp_mtu > MAXMTU)     config->l2tp_mtu = MAXMTU;
 
        // reset MRU/MSS globals
        MRU = config->l2tp_mtu - L2TP_HDRS;
        else if (config->l2tp_mtu < MINMTU)     config->l2tp_mtu = MINMTU;
        else if (config->l2tp_mtu > MAXMTU)     config->l2tp_mtu = MAXMTU;
 
        // reset MRU/MSS globals
        MRU = config->l2tp_mtu - L2TP_HDRS;

+       if (MRU > PPPoE_MRU)
+               MRU = PPPoE_MRU;
+

        MSS = MRU - TCP_HDRS;
 
        // Update radius
        MSS = MRU - TCP_HDRS;
 
        // Update radius


@@ -4413,6 +4993,40 @@ 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);


@@ -4460,8 +5074,6 @@ static void update_config()
                        LOG(0, 0, 0, "Can't write to PID file %s: %s\n", config->pid_file, strerror(errno));
                }
        }
                        LOG(0, 0, 0, "Can't write to PID file %s: %s\n", config->pid_file, strerror(errno));
                }
        }

-
-       config->reload_config = 0;

 }
 
 static void read_config_file()
 }
 
 static void read_config_file()


@@ -4479,7 +5091,6 @@ static void read_config_file()
        cli_do_file(f);
        LOG(3, 0, 0, "Done reading config file\n");
        fclose(f);
        cli_do_file(f);
        LOG(3, 0, 0, "Done reading config file\n");
        fclose(f);

-       update_config();

 }
 
 int sessionsetup(sessionidt s, tunnelidt t)
 }
 
 int sessionsetup(sessionidt s, tunnelidt t)


@@ -4494,13 +5105,27 @@ 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)
                {
                        LOG(0, s, t, "   No IP allocated.  The IP address pool is FULL!\n");
        if (!session[s].ip)
        {
                assign_ip_address(s);
                if (!session[s].ip)
                {
                        LOG(0, s, t, "   No IP allocated.  The IP address pool is FULL!\n");

-                       sessionshutdown(s, "No IP addresses available.", 2, 7); // try another
+                       sessionshutdown(s, "No IP addresses available.", CDN_TRY_ANOTHER, TERM_SERVICE_UNAVAILABLE);

                        return 0;
                }
                LOG(3, s, t, "   No IP allocated.  Assigned %s from pool\n",
                        return 0;
                }
                LOG(3, s, t, "   No IP allocated.  Assigned %s from pool\n",


@@ -4521,6 +5146,9 @@ int sessionsetup(sessionidt s, tunnelidt t)
                {
                        if (i == s) continue;
                        if (!session[s].opened) continue;
                {
                        if (i == s) continue;
                        if (!session[s].opened) continue;

+                       // 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");


@@ -4529,11 +5157,27 @@ int sessionsetup(sessionidt s, tunnelidt t)
 
                        if (config->allow_duplicate_users) continue;
                        if (session[s].walled_garden || session[i].walled_garden) 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;
 


@@ -4573,7 +5217,7 @@ 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),


@@ -4676,13 +5320,13 @@ 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;
        }
 


@@ -4887,7 +5531,7 @@ static void plugins_done()
                run_plugin_done(p);
 }
 
                run_plugin_done(p);
 }
 

-static void processcontrol(uint8_t *buf, int len, struct sockaddr_in *addr, int alen)
+static void processcontrol(uint8_t *buf, int len, struct sockaddr_in *addr, int alen, struct in_addr *local)

 {
        struct nsctl request;
        struct nsctl response;
 {
        struct nsctl request;
        struct nsctl response;


@@ -5045,7 +5689,7 @@ static void processcontrol(uint8_t *buf, int len, struct sockaddr_in *addr, int
        r = pack_control(buf, NSCTL_MAX_PKT_SZ, response.type, response.argc, response.argv);
        if (r > 0)
        {
        r = pack_control(buf, NSCTL_MAX_PKT_SZ, response.type, response.argc, response.argv);
        if (r > 0)
        {

-               sendto(controlfd, buf, r, 0, (const struct sockaddr *) addr, alen);
+               sendtofrom(controlfd, buf, r, 0, (const struct sockaddr *) addr, alen, local);

                if (log_stream && config->debug >= 4)
                {
                        LOG(4, 0, 0, "Sent [%s] ", fmtaddr(addr->sin_addr.s_addr, 0));
                if (log_stream && config->debug >= 4)
                {
                        LOG(4, 0, 0, "Sent [%s] ", fmtaddr(addr->sin_addr.s_addr, 0));


@@ -5066,7 +5710,7 @@ 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;


@@ -5136,7 +5780,7 @@ 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;


@@ -5349,7 +5993,9 @@ int ip_filter(uint8_t *buf, int len, uint8_t filter)
 
                if (frag_offset)
                {
 
                if (frag_offset)
                {

-                       if (!rule->frag || rule->action == FILTER_ACTION_DENY)
+                       // layer 4 deny rules are skipped
+                       if (rule->action == FILTER_ACTION_DENY &&
+                           (rule->src_ports.op || rule->dst_ports.op || rule->tcp_flag_op))

                                continue;
                }
                else
                                continue;
                }
                else