Fix: loopback protection
[l2tpns.git] / l2tpns.c
index 581198d..694726d 100644 (file)
--- a/l2tpns.c
+++ b/l2tpns.c
@@ -4,8 +4,6 @@
 // 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 1.176 2011/01/20 12:48:40 bodea Exp $";
-
 #include <arpa/inet.h>
 #include <assert.h>
 #include <errno.h>
 #include <arpa/inet.h>
 #include <assert.h>
 #include <errno.h>
@@ -30,7 +28,7 @@ char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.176 2011/01/20 12:48:40 bodea Exp
 #include <sys/time.h>
 #include <sys/resource.h>
 #include <sys/wait.h>
 #include <sys/time.h>
 #include <sys/resource.h>
 #include <sys/wait.h>
-#include <linux/if.h>
+#include <net/if.h>
 #include <stddef.h>
 #include <time.h>
 #include <dlfcn.h>
 #include <stddef.h>
 #include <time.h>
 #include <dlfcn.h>
@@ -55,11 +53,23 @@ char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.176 2011/01/20 12:48:40 bodea Exp
 #include "bgp.h"
 #endif
 
 #include "bgp.h"
 #endif
 
+#ifdef LAC
+#include "l2tplac.h"
+#endif
+
+#ifdef LAC
+char * Vendor_name = "Linux L2TPNS";
+uint32_t call_serial_number = 0;
+#endif
+
 // Globals
 configt *config = NULL;                // all configuration
 int nlfd = -1;                 // netlink socket
 int tunfd = -1;                        // tun interface file handle. (network device)
 int udpfd = -1;                        // UDP file handle
 // 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
+#ifdef LAC
+int udplacfd = -1;             // UDP LAC file handle
+#endif
 int controlfd = -1;            // Control signal handle
 int clifd = -1;                        // Socket listening for CLI connections.
 int daefd = -1;                        // Socket listening for DAE connections.
 int controlfd = -1;            // Control signal handle
 int clifd = -1;                        // Socket listening for CLI connections.
 int daefd = -1;                        // Socket listening for DAE connections.
@@ -104,6 +114,7 @@ uint32_t eth_tx = 0;
 
 static uint32_t ip_pool_size = 1;      // Size of the pool of addresses used for dynamic address allocation.
 time_t time_now = 0;                   // Current time in seconds since epoch.
 
 static uint32_t ip_pool_size = 1;      // Size of the pool of addresses used for dynamic address allocation.
 time_t time_now = 0;                   // Current time in seconds since epoch.
+uint64_t time_now_ms = 0;              // Current time in milliseconds since epoch.
 static char time_now_string[64] = {0}; // Current time as a string.
 static int time_changed = 0;           // time_now changed
 char main_quit = 0;                    // True if we're in the process of exiting.
 static char time_now_string[64] = {0}; // Current time as a string.
 static int time_changed = 0;           // time_now changed
 char main_quit = 0;                    // True if we're in the process of exiting.
@@ -161,8 +172,16 @@ config_descriptt config_values[] = {
        CONFIG("ipv6_prefix", ipv6_prefix, IPv6),
        CONFIG("cli_bind_address", cli_bind_address, IPv4),
        CONFIG("hostname", hostname, STRING),
        CONFIG("ipv6_prefix", ipv6_prefix, IPv6),
        CONFIG("cli_bind_address", cli_bind_address, IPv4),
        CONFIG("hostname", hostname, STRING),
+#ifdef BGP
        CONFIG("nexthop_address", nexthop_address, IPv4),
        CONFIG("nexthop6_address", nexthop6_address, IPv6),
        CONFIG("nexthop_address", nexthop_address, IPv4),
        CONFIG("nexthop6_address", nexthop6_address, IPv6),
+#endif
+       CONFIG("echo_timeout", echo_timeout, INT),
+       CONFIG("idle_echo_timeout", idle_echo_timeout, INT),
+#ifdef LAC
+       CONFIG("disable_lac_func", disable_lac_func, BOOL),
+       CONFIG("bind_portremotelns", bind_portremotelns, SHORT),
+#endif
        { NULL, 0, 0, 0 },
 };
 
        { NULL, 0, 0, 0 },
 };
 
@@ -223,13 +242,6 @@ 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);
 
 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
-
-// quit actions (master)
-#define QUIT_FAILOVER  1 // SIGTERM: exit when all control messages have been acked (for cluster failover)
-#define QUIT_SHUTDOWN  2 // SIGQUIT: shutdown sessions/tunnels, reject new connections
-
 // 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)
 // 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)
@@ -242,6 +254,10 @@ static clockt now(double *f)
            time_now = t.tv_sec;
            time_changed++;
        }
            time_now = t.tv_sec;
            time_changed++;
        }
+
+       // Time in milliseconds
+       time_now_ms = (t.tv_sec * 1000) + (t.tv_usec/1000);
+
        return (t.tv_sec - basetime) * 10 + t.tv_usec / 100000 + 1;
 }
 
        return (t.tv_sec - basetime) * 10 + t.tv_usec / 100000 + 1;
 }
 
@@ -446,13 +462,17 @@ static void routeset(sessionidt s, in_addr_t ip, int prefixlen, in_addr_t gw, in
                req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE;
        }
        else
                req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE;
        }
        else
+       {
                req.nh.nlmsg_type = RTM_DELROUTE;
                req.nh.nlmsg_type = RTM_DELROUTE;
+               req.nh.nlmsg_flags = NLM_F_REQUEST;
+       }
+
        req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.rt));
 
        req.rt.rtm_family = AF_INET;
        req.rt.rtm_dst_len = prefixlen;
        req.rt.rtm_table = RT_TABLE_MAIN;
        req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.rt));
 
        req.rt.rtm_family = AF_INET;
        req.rt.rtm_dst_len = prefixlen;
        req.rt.rtm_table = RT_TABLE_MAIN;
-       req.rt.rtm_protocol = RTPROT_BOOT; // XXX
+       req.rt.rtm_protocol = 42;
        req.rt.rtm_scope = RT_SCOPE_LINK;
        req.rt.rtm_type = RTN_UNICAST;
 
        req.rt.rtm_scope = RT_SCOPE_LINK;
        req.rt.rtm_type = RTN_UNICAST;
 
@@ -465,7 +485,7 @@ static void routeset(sessionidt s, in_addr_t ip, int prefixlen, in_addr_t gw, in
                netlink_addattr(&req.nh, RTA_GATEWAY, &n_ip, sizeof(n_ip));
        }
 
                netlink_addattr(&req.nh, RTA_GATEWAY, &n_ip, sizeof(n_ip));
        }
 
-       LOG(1, s, 0, "Route %s %s/%d%s%s\n", add ? "add" : "del",
+       LOG(1, s, session[s].tunnel, "Route %s %s/%d%s%s\n", add ? "add" : "del",
            fmtaddr(htonl(ip), 0), prefixlen,
            gw ? " via" : "", gw ? fmtaddr(htonl(gw), 2) : "");
 
            fmtaddr(htonl(ip), 0), prefixlen,
            gw ? " via" : "", gw ? fmtaddr(htonl(gw), 2) : "");
 
@@ -521,13 +541,17 @@ void route6set(sessionidt s, struct in6_addr ip, int prefixlen, int add)
                req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE;
        }
        else
                req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE;
        }
        else
+       {
                req.nh.nlmsg_type = RTM_DELROUTE;
                req.nh.nlmsg_type = RTM_DELROUTE;
+               req.nh.nlmsg_flags = NLM_F_REQUEST;
+       }
+
        req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.rt));
 
        req.rt.rtm_family = AF_INET6;
        req.rt.rtm_dst_len = prefixlen;
        req.rt.rtm_table = RT_TABLE_MAIN;
        req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.rt));
 
        req.rt.rtm_family = AF_INET6;
        req.rt.rtm_dst_len = prefixlen;
        req.rt.rtm_table = RT_TABLE_MAIN;
-       req.rt.rtm_protocol = RTPROT_BOOT; // XXX
+       req.rt.rtm_protocol = 42;
        req.rt.rtm_scope = RT_SCOPE_LINK;
        req.rt.rtm_type = RTN_UNICAST;
 
        req.rt.rtm_scope = RT_SCOPE_LINK;
        req.rt.rtm_type = RTN_UNICAST;
 
@@ -536,7 +560,7 @@ void route6set(sessionidt s, struct in6_addr ip, int prefixlen, int add)
        metric = 1;
        netlink_addattr(&req.nh, RTA_METRICS, &metric, sizeof(metric));
 
        metric = 1;
        netlink_addattr(&req.nh, RTA_METRICS, &metric, sizeof(metric));
 
-       LOG(1, 0, 0, "Route %s %s/%d\n",
+       LOG(1, s, session[s].tunnel, "Route %s %s/%d\n",
            add ? "add" : "del",
            inet_ntop(AF_INET6, &ip, ipv6addr, INET6_ADDRSTRLEN),
            prefixlen);
            add ? "add" : "del",
            inet_ntop(AF_INET6, &ip, ipv6addr, INET6_ADDRSTRLEN),
            prefixlen);
@@ -648,7 +672,6 @@ static char *tun_nl_phase_msg[] = {
 // Set up TUN interface
 static void inittun(void)
 {
 // Set up TUN interface
 static void inittun(void)
 {
-       struct ifinfomsg ifinfo;
        struct ifreq ifr;
 
        memset(&ifr, 0, sizeof(ifr));
        struct ifreq ifr;
 
        memset(&ifr, 0, sizeof(ifr));
@@ -672,41 +695,13 @@ static void inittun(void)
        assert(strlen(ifr.ifr_name) < sizeof(config->tundevice) - 1);
        strncpy(config->tundevice, ifr.ifr_name, sizeof(config->tundevice));
 
        assert(strlen(ifr.ifr_name) < sizeof(config->tundevice) - 1);
        strncpy(config->tundevice, ifr.ifr_name, sizeof(config->tundevice));
 
+       tunidx = if_nametoindex(config->tundevice);
+       if (tunidx == 0)
        {
        {
-               // get the interface index
-               struct {
-                       struct nlmsghdr nh;
-                       struct ifinfomsg ifinfo;
-               } req;
-               char buf[4096];
-               ssize_t len;
-               struct nlmsghdr *resp_nh;
-
-               req.nh.nlmsg_type = RTM_GETLINK;
-               req.nh.nlmsg_flags = NLM_F_REQUEST;
-               req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifinfo));
-
-               req.ifinfo.ifi_family = AF_UNSPEC; // as the man says
-
-               netlink_addattr(&req.nh, IFLA_IFNAME, config->tundevice, strlen(config->tundevice)+1);
-
-               if(netlink_send(&req.nh) < 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))
-               {
-                       LOG(0, 0, 0, "Malformed answer getting tun ifindex %ld\n", len);
-                       exit(1);
-               }
-
-               memcpy(&ifinfo, NLMSG_DATA(resp_nh), sizeof(ifinfo));
-               // got index
-               tunidx = ifinfo.ifi_index;
+               LOG(0, 0, 0, "Can't get tun interface index\n");
+               exit(1);
        }
        }
+
        {
                struct {
                        // interface setting
        {
                struct {
                        // interface setting
@@ -722,11 +717,12 @@ static void inittun(void)
 
                memset(&req, 0, sizeof(req));
 
 
                memset(&req, 0, sizeof(req));
 
-               req.nh.nlmsg_type = RTM_SETLINK;
+               req.nh.nlmsg_type = RTM_NEWLINK;
                req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_MULTI;
                req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifinfo));
 
                req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_MULTI;
                req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.ifmsg.ifinfo));
 
-               req.ifmsg.ifinfo = ifinfo;
+               req.ifmsg.ifinfo.ifi_family = AF_UNSPEC;
+               req.ifmsg.ifinfo.ifi_index = tunidx;
                req.ifmsg.ifinfo.ifi_flags |= IFF_UP; // set interface up
                req.ifmsg.ifinfo.ifi_change = IFF_UP; // only change this flag
 
                req.ifmsg.ifinfo.ifi_flags |= IFF_UP; // set interface up
                req.ifmsg.ifinfo.ifi_change = IFF_UP; // only change this flag
 
@@ -749,7 +745,7 @@ static void inittun(void)
                req.ifmsg.ifaddr.ifa_family = AF_INET;
                req.ifmsg.ifaddr.ifa_prefixlen = 32;
                req.ifmsg.ifaddr.ifa_scope = RT_SCOPE_UNIVERSE;
                req.ifmsg.ifaddr.ifa_family = AF_INET;
                req.ifmsg.ifaddr.ifa_prefixlen = 32;
                req.ifmsg.ifaddr.ifa_scope = RT_SCOPE_UNIVERSE;
-               req.ifmsg.ifaddr.ifa_index = ifinfo.ifi_index;
+               req.ifmsg.ifaddr.ifa_index = tunidx;
 
                if (config->bind_address)
                        ip = config->bind_address;
 
                if (config->bind_address)
                        ip = config->bind_address;
@@ -773,7 +769,7 @@ static void inittun(void)
                        req.ifmsg.ifaddr.ifa_family = AF_INET6;
                        req.ifmsg.ifaddr.ifa_prefixlen = 64;
                        req.ifmsg.ifaddr.ifa_scope = RT_SCOPE_LINK;
                        req.ifmsg.ifaddr.ifa_family = AF_INET6;
                        req.ifmsg.ifaddr.ifa_prefixlen = 64;
                        req.ifmsg.ifaddr.ifa_scope = RT_SCOPE_LINK;
-                       req.ifmsg.ifaddr.ifa_index = ifinfo.ifi_index;
+                       req.ifmsg.ifaddr.ifa_index = tunidx;
 
                        // Link local address is FE80::1
                        memset(&ip6, 0, sizeof(ip6));
 
                        // Link local address is FE80::1
                        memset(&ip6, 0, sizeof(ip6));
@@ -794,7 +790,7 @@ static void inittun(void)
                        req.ifmsg.ifaddr.ifa_family = AF_INET6;
                        req.ifmsg.ifaddr.ifa_prefixlen = 64;
                        req.ifmsg.ifaddr.ifa_scope = RT_SCOPE_UNIVERSE;
                        req.ifmsg.ifaddr.ifa_family = AF_INET6;
                        req.ifmsg.ifaddr.ifa_prefixlen = 64;
                        req.ifmsg.ifaddr.ifa_scope = RT_SCOPE_UNIVERSE;
-                       req.ifmsg.ifaddr.ifa_index = ifinfo.ifi_index;
+                       req.ifmsg.ifaddr.ifa_index = tunidx;
 
                        // Global address is prefix::1
                        ip6 = config->ipv6_prefix;
 
                        // Global address is prefix::1
                        ip6 = config->ipv6_prefix;
@@ -877,6 +873,24 @@ static void initudp(void)
                exit(1);
        }
 
                exit(1);
        }
 
+#ifdef LAC
+       // Tunnel to Remote LNS
+       memset(&addr, 0, sizeof(addr));
+       addr.sin_family = AF_INET;
+       addr.sin_port = htons(config->bind_portremotelns);
+       udplacfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+       setsockopt(udplacfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
+       {
+               int flags = fcntl(udplacfd, F_GETFL, 0);
+               fcntl(udplacfd, F_SETFL, flags | O_NONBLOCK);
+       }
+       if (bind(udplacfd, (struct sockaddr *) &addr, sizeof(addr)) < 0)
+       {
+               LOG(0, 0, 0, "Error in UDP REMOTE LNS bind: %s\n", strerror(errno));
+               exit(1);
+       }
+#endif
+
        // Intercept
        snoopfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
 }
        // Intercept
        snoopfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
 }
@@ -1197,8 +1211,11 @@ void tunnelsend(uint8_t * buf, uint16_t l, tunnelidt t)
                        LOG(3, 0, t, "Control message resend try %d\n", tunnel[t].try);
                }
        }
                        LOG(3, 0, t, "Control message resend try %d\n", tunnel[t].try);
                }
        }
-
+#ifdef LAC
+       if (sendto((tunnel[t].isremotelns?udplacfd:udpfd), buf, l, 0, (void *) &addr, sizeof(addr)) < 0)
+#else
        if (sendto(udpfd, buf, l, 0, (void *) &addr, sizeof(addr)) < 0)
        if (sendto(udpfd, buf, l, 0, (void *) &addr, sizeof(addr)) < 0)
+#endif
        {
                LOG(0, ntohs((*(uint16_t *) (buf + 6))), t, "Error sending data out tunnel: %s (udpfd=%d, buf=%p, len=%d, dest=%s)\n",
                                strerror(errno), udpfd, buf, l, inet_ntoa(addr.sin_addr));
        {
                LOG(0, ntohs((*(uint16_t *) (buf + 6))), t, "Error sending data out tunnel: %s (udpfd=%d, buf=%p, len=%d, dest=%s)\n",
                                strerror(errno), udpfd, buf, l, inet_ntoa(addr.sin_addr));
@@ -1345,7 +1362,8 @@ static void update_session_out_stat(sessionidt s, sessiont *sp, int len)
 
 // process outgoing (to tunnel) IP
 //
 
 // process outgoing (to tunnel) IP
 //
-static void processipout(uint8_t *buf, int len)
+// (i.e. this routine writes to data[-8]).
+void processipout(uint8_t *buf, int len)
 {
        sessionidt s;
        sessiont *sp;
 {
        sessionidt s;
        sessiont *sp;
@@ -1482,75 +1500,123 @@ static void processipout(uint8_t *buf, int len)
                return;
        }
 
                return;
        }
 
-       // Add on L2TP header
-        {
-                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);
+       if(session[s].bundle != 0 && bundle[session[s].bundle].num_of_links > 1)
+       {
+
+               if (!config->cluster_iam_master)
+               {
+                       // The MPPP packets must be managed by the Master.
+                       master_forward_mppp_packet(s, data, size);
+                       return;
+               }
+
+               // Add on L2TP header
+               sessionidt members[MAXBUNDLESES];
+               bundleidt bid = session[s].bundle;
+               bundlet *b = &bundle[bid];
+               uint32_t num_of_links, nb_opened;
+               int i;
+
+               num_of_links = b->num_of_links;
+               nb_opened = 0;
+               for (i = 0;i < num_of_links;i++)
+               {
+                       s = b->members[i];
+                       if (session[s].ppp.lcp == Opened)
+                       {
+                               members[nb_opened] = s;
+                               nb_opened++;
+                       }
+               }
+
+               if (nb_opened < 1)
+               {
+                       LOG(3, s, t, "MPPP: PROCESSIPOUT ERROR, no session opened in bundle:%d\n", bid);
+                       return;
+               }
+
+               num_of_links = nb_opened;
+               b->current_ses = (b->current_ses + 1) % num_of_links;
+               s = members[b->current_ses];
+               t = session[s].tunnel;
+               sp = &session[s];
+               LOG(4, s, t, "MPPP: (1)Session number becomes: %d\n", s);
+
+               if (num_of_links > 1)
+               {
+                       if(len > MINFRAGLEN)
+                       {
+                               //for rotate traffic among the member links
+                               uint32_t divisor = num_of_links;
+                               if (divisor > 2)
+                                       divisor = divisor/2 + (divisor & 1);
+
+                               // Partition the packet to "num_of_links" fragments
+                               uint32_t fraglen = len / divisor;
+                               uint32_t last_fraglen = fraglen + len % divisor;
                                uint32_t remain = len;
 
                                // send the first packet
                                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...
+                               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);
                                // statistics
                                update_session_out_stat(s, sp, fraglen);
+
                                remain -= fraglen;
                                while (remain > last_fraglen)
                                remain -= fraglen;
                                while (remain > last_fraglen)
-                               { 
-                                       s = b->members[b->current_ses = ++b->current_ses % num_of_links];
+                               {
+                                       b->current_ses = (b->current_ses + 1) % num_of_links;
+                                       s = members[b->current_ses];
                                        t = session[s].tunnel;
                                        sp = &session[s];
                                        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...
+                                       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
                                        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];
+                               b->current_ses = (b->current_ses + 1) % num_of_links;
+                               s = members[b->current_ses];
                                t = session[s].tunnel;
                                sp = &session[s];
                                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...
+                               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);
                                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...
+                       }
+                       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);
                                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...
+                       }
+               }
+               else
+               {
+                       // Send it as one frame (NO MPPP Frame)
+                       uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, len, s, t, PPPIP, 0, 0, 0);
+                       if (!p) return;
+                       tunnelsend(fragbuf, len + (p-fragbuf), t); // send it...
                        update_session_out_stat(s, sp, len);
                        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)
 
        // Snooping this session, send it to intercept box
        if (sp->snoop_ip && sp->snoop_port)
@@ -1630,7 +1696,10 @@ static void processipv6out(uint8_t * buf, int len)
        if (session[s].bundle && bundle[session[s].bundle].num_of_links > 1)
        {
                bundleidt bid = session[s].bundle;
        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];
+               bundlet *b = &bundle[bid];
+
+               b->current_ses = (b->current_ses + 1) % b->num_of_links;
+               s = b->members[b->current_ses];
                LOG(3, s, session[s].tunnel, "MPPP: Session number becomes: %u\n", s);
        }
        t = session[s].tunnel;
                LOG(3, s, session[s].tunnel, "MPPP: Session number becomes: %u\n", s);
        }
        t = session[s].tunnel;
@@ -1685,7 +1754,6 @@ static void send_ipout(sessionidt s, uint8_t *buf, int len)
 {
        sessiont *sp;
        tunnelidt t;
 {
        sessiont *sp;
        tunnelidt t;
-       in_addr_t ip;
 
        uint8_t b[MAXETHER + 20];
 
 
        uint8_t b[MAXETHER + 20];
 
@@ -1699,8 +1767,6 @@ static void send_ipout(sessionidt s, uint8_t *buf, int len)
        buf += 4;
        len -= 4;
 
        buf += 4;
        len -= 4;
 
-       ip = *(in_addr_t *)(buf + 16);
-
        if (!session[s].ip)
                return;
 
        if (!session[s].ip)
                return;
 
@@ -1733,10 +1799,10 @@ static void send_ipout(sessionidt s, uint8_t *buf, int len)
 static void control16(controlt * c, uint16_t avp, uint16_t val, uint8_t m)
 {
        uint16_t l = (m ? 0x8008 : 0x0008);
 static void control16(controlt * c, uint16_t avp, uint16_t val, uint8_t m)
 {
        uint16_t l = (m ? 0x8008 : 0x0008);
-       *(uint16_t *) (c->buf + c->length + 0) = htons(l);
-       *(uint16_t *) (c->buf + c->length + 2) = htons(0);
-       *(uint16_t *) (c->buf + c->length + 4) = htons(avp);
-       *(uint16_t *) (c->buf + c->length + 6) = htons(val);
+       c->buf16[c->length/2 + 0] = htons(l);
+       c->buf16[c->length/2 + 1] = htons(0);
+       c->buf16[c->length/2 + 2] = htons(avp);
+       c->buf16[c->length/2 + 3] = htons(val);
        c->length += 8;
 }
 
        c->length += 8;
 }
 
@@ -1744,10 +1810,10 @@ static void control16(controlt * c, uint16_t avp, uint16_t val, uint8_t m)
 static void control32(controlt * c, uint16_t avp, uint32_t val, uint8_t m)
 {
        uint16_t l = (m ? 0x800A : 0x000A);
 static void control32(controlt * c, uint16_t avp, uint32_t val, uint8_t m)
 {
        uint16_t l = (m ? 0x800A : 0x000A);
-       *(uint16_t *) (c->buf + c->length + 0) = htons(l);
-       *(uint16_t *) (c->buf + c->length + 2) = htons(0);
-       *(uint16_t *) (c->buf + c->length + 4) = htons(avp);
-       *(uint32_t *) (c->buf + c->length + 6) = htonl(val);
+       c->buf16[c->length/2 + 0] = htons(l);
+       c->buf16[c->length/2 + 1] = htons(0);
+       c->buf16[c->length/2 + 2] = htons(avp);
+       *(uint32_t *) &c->buf[c->length + 6] = htonl(val);
        c->length += 10;
 }
 
        c->length += 10;
 }
 
@@ -1755,10 +1821,10 @@ static void control32(controlt * c, uint16_t avp, uint32_t val, uint8_t m)
 static void controls(controlt * c, uint16_t avp, char *val, uint8_t m)
 {
        uint16_t l = ((m ? 0x8000 : 0) + strlen(val) + 6);
 static void controls(controlt * c, uint16_t avp, char *val, uint8_t m)
 {
        uint16_t l = ((m ? 0x8000 : 0) + strlen(val) + 6);
-       *(uint16_t *) (c->buf + c->length + 0) = htons(l);
-       *(uint16_t *) (c->buf + c->length + 2) = htons(0);
-       *(uint16_t *) (c->buf + c->length + 4) = htons(avp);
-       memcpy(c->buf + c->length + 6, val, strlen(val));
+       c->buf16[c->length/2 + 0] = htons(l);
+       c->buf16[c->length/2 + 1] = htons(0);
+       c->buf16[c->length/2 + 2] = htons(avp);
+       memcpy(&c->buf[c->length + 6], val, strlen(val));
        c->length += 6 + strlen(val);
 }
 
        c->length += 6 + strlen(val);
 }
 
@@ -1766,10 +1832,10 @@ static void controls(controlt * c, uint16_t avp, char *val, uint8_t m)
 static void controlb(controlt * c, uint16_t avp, uint8_t *val, unsigned int len, uint8_t m)
 {
        uint16_t l = ((m ? 0x8000 : 0) + len + 6);
 static void controlb(controlt * c, uint16_t avp, uint8_t *val, unsigned int len, uint8_t m)
 {
        uint16_t l = ((m ? 0x8000 : 0) + len + 6);
-       *(uint16_t *) (c->buf + c->length + 0) = htons(l);
-       *(uint16_t *) (c->buf + c->length + 2) = htons(0);
-       *(uint16_t *) (c->buf + c->length + 4) = htons(avp);
-       memcpy(c->buf + c->length + 6, val, len);
+       c->buf16[c->length/2 + 0] = htons(l);
+       c->buf16[c->length/2 + 1] = htons(0);
+       c->buf16[c->length/2 + 2] = htons(avp);
+       memcpy(&c->buf[c->length + 6], val, len);
        c->length += 6 + len;
 }
 
        c->length += 6 + len;
 }
 
@@ -1786,7 +1852,7 @@ static controlt *controlnew(uint16_t mtype)
        }
        assert(c);
        c->next = 0;
        }
        assert(c);
        c->next = 0;
-       *(uint16_t *) (c->buf + 0) = htons(0xC802); // flags/ver
+       c->buf16[0] = htons(0xC802); // flags/ver
        c->length = 12;
        control16(c, 0, mtype, 1);
        return c;
        c->length = 12;
        control16(c, 0, mtype, 1);
        return c;
@@ -1796,26 +1862,26 @@ static controlt *controlnew(uint16_t mtype)
 // (ZLB send).
 static void controlnull(tunnelidt t)
 {
 // (ZLB send).
 static void controlnull(tunnelidt t)
 {
-       uint8_t buf[12];
+       uint16_t buf[6];
        if (tunnel[t].controlc) // Messages queued; They will carry the ack.
                return;
 
        if (tunnel[t].controlc) // Messages queued; They will carry the ack.
                return;
 
-       *(uint16_t *) (buf + 0) = htons(0xC802); // flags/ver
-       *(uint16_t *) (buf + 2) = htons(12); // length
-       *(uint16_t *) (buf + 4) = htons(tunnel[t].far); // tunnel
-       *(uint16_t *) (buf + 6) = htons(0); // session
-       *(uint16_t *) (buf + 8) = htons(tunnel[t].ns); // sequence
-       *(uint16_t *) (buf + 10) = htons(tunnel[t].nr); // sequence
-       tunnelsend(buf, 12, t);
+       buf[0] = htons(0xC802); // flags/ver
+       buf[1] = htons(12); // length
+       buf[2] = htons(tunnel[t].far); // tunnel
+       buf[3] = htons(0); // session
+       buf[4] = htons(tunnel[t].ns); // sequence
+       buf[5] = htons(tunnel[t].nr); // sequence
+       tunnelsend((uint8_t *)buf, 12, t);
 }
 
 // add a control message to a tunnel, and send if within window
 static void controladd(controlt *c, sessionidt far, tunnelidt t)
 {
 }
 
 // add a control message to a tunnel, and send if within window
 static void controladd(controlt *c, sessionidt far, tunnelidt t)
 {
-       *(uint16_t *) (c->buf + 2) = htons(c->length); // length
-       *(uint16_t *) (c->buf + 4) = htons(tunnel[t].far); // tunnel
-       *(uint16_t *) (c->buf + 6) = htons(far); // session
-       *(uint16_t *) (c->buf + 8) = htons(tunnel[t].ns); // sequence
+       c->buf16[1] = htons(c->length); // length
+       c->buf16[2] = htons(tunnel[t].far); // tunnel
+       c->buf16[3] = htons(far); // session
+       c->buf16[4] = htons(tunnel[t].ns); // sequence
        tunnel[t].ns++;              // advance sequence
        // link in message in to queue
        if (tunnel[t].controlc)
        tunnel[t].ns++;              // advance sequence
        // link in message in to queue
        if (tunnel[t].controlc)
@@ -1991,36 +2057,67 @@ void sessionshutdown(sessionidt s, char const *reason, int cdn_result, int cdn_e
                if (session[s].ppp.ipv6cp == Opened && session[s].ipv6prefixlen && del_routes)
                        route6set(s, session[s].ipv6route, session[s].ipv6prefixlen, 0);
                
                if (session[s].ppp.ipv6cp == Opened && session[s].ipv6prefixlen && del_routes)
                        route6set(s, session[s].ipv6route, session[s].ipv6prefixlen, 0);
                
-               if (b) 
+               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) 
+                       // This session was part of a bundle
+                       bundle[b].num_of_links--;
+                       LOG(3, s, session[s].tunnel, "MPPP: Dropping member link: %d from bundle %d\n",s,b);
+                       if(bundle[b].num_of_links == 0)
                        {
                        {
-                               bundleclear(b);
-                               LOG(3, s, 0, "MPPP: Kill bundle: %d (No remaing member links)\n",b);
-                       }
-                       else 
+                               bundleclear(b);
+                               LOG(3, s, session[s].tunnel, "MPPP: Kill bundle: %d (No remaing member links)\n",b);
+                       }
+                       else 
                        {
                        {
-                               // Adjust the members array to accomodate the new change
-                               uint8_t mem_num = 0;
-                               // It should be here num_of_links instead of num_of_links-1 (previous instruction "num_of_links--")
-                               if(bundle[b].members[bundle[b].num_of_links] != s) 
+                               // 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);
-               }
+                                       uint8_t ml;
+                                       for(ml = 0; ml<bundle[b].num_of_links; ml++)
+                                       if(bundle[b].members[ml] == s)
+                                       {
+                                                       mem_num = ml;
+                                                       break;
+                                       }
+                                       bundle[b].members[mem_num] = bundle[b].members[bundle[b].num_of_links];
+                                       LOG(3, s, session[s].tunnel, "MPPP: Adjusted member links array\n");
+
+                                       // If the killed session is the first of the bundle,
+                                       // the new first session must be stored in the cache_ipmap
+                                       // else the function sessionbyip return 0 and the sending not work any more (processipout).
+                                       if (mem_num == 0)
+                                       {
+                                               sessionidt new_s = bundle[b].members[0];
+
+                                               routed = 0;
+                                               // Add the route for this session.
+                                               for (r = 0; r < MAXROUTE && session[new_s].route[r].ip; r++)
+                                               {
+                                                       int i, prefixlen;
+                                                       in_addr_t ip;
+
+                                                       prefixlen = session[new_s].route[r].prefixlen;
+                                                       ip = session[new_s].route[r].ip;
+
+                                                       if (!prefixlen) prefixlen = 32;
+                                                       ip &= 0xffffffff << (32 - prefixlen);   // Force the ip to be the first one in the route.
+
+                                                       for (i = ip; i < ip+(1<<(32-prefixlen)) ; ++i)
+                                                               cache_ipmap(i, new_s);
+                                               }
+                                               cache_ipmap(session[new_s].ip, new_s);
+
+                                               // IPV6 route
+                                               if (session[new_s].ipv6prefixlen)
+                                                       cache_ipv6map(session[new_s].ipv6route, session[new_s].ipv6prefixlen, new_s);
+                                       }
+                               }
+                       }
+
+                       cluster_send_bundle(b);
+        }
        }
 
        if (session[s].throttle_in || session[s].throttle_out) // Unthrottle if throttled.
        }
 
        if (session[s].throttle_in || session[s].throttle_out) // Unthrottle if throttled.
@@ -2031,10 +2128,10 @@ void sessionshutdown(sessionidt s, char const *reason, int cdn_result, int cdn_e
                controlt *c = controlnew(14); // sending CDN
                if (cdn_error)
                {
                controlt *c = controlnew(14); // sending CDN
                if (cdn_error)
                {
-                       uint8_t buf[4];
-                       *(uint16_t *) buf     = htons(cdn_result);
-                       *(uint16_t *) (buf+2) = htons(cdn_error);
-                       controlb(c, 1, buf, 4, 1);
+                       uint16_t buf[2];
+                       buf[0] = htons(cdn_result);
+                       buf[1] = htons(cdn_error);
+                       controlb(c, 1, (uint8_t *)buf, 4, 1);
                }
                else
                        control16(c, 1, cdn_result, 1);
                }
                else
                        control16(c, 1, cdn_result, 1);
@@ -2144,6 +2241,18 @@ void sessionkill(sessionidt s, char *reason)
        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
 
+#ifdef LAC
+       if (session[s].forwardtosession)
+       {
+               sessionidt sess = session[s].forwardtosession;
+               if (session[sess].forwardtosession == s)
+               {
+                       // Shutdown the linked session also.
+                       sessionshutdown(sess, reason, CDN_ADMIN_DISC, TERM_ADMIN_RESET);
+               }
+       }
+#endif
+
        LOG(2, s, session[s].tunnel, "Kill session %d (%s): %s\n", s, session[s].user, reason);
        sessionclear(s);
        cluster_send_session(s);
        LOG(2, s, session[s].tunnel, "Kill session %d (%s): %s\n", s, session[s].user, reason);
        sessionclear(s);
        cluster_send_session(s);
@@ -2223,21 +2332,21 @@ static void tunnelshutdown(tunnelidt t, char *reason, int result, int error, cha
                controlt *c = controlnew(4);    // sending StopCCN
                if (error)
                {
                controlt *c = controlnew(4);    // sending StopCCN
                if (error)
                {
-                       uint8_t buf[64];
+                       uint16_t buf[32];
                        int l = 4;
                        int l = 4;
-                       *(uint16_t *) buf     = htons(result);
-                       *(uint16_t *) (buf+2) = htons(error);
+                       buf[0] = htons(result);
+                       buf[1] = htons(error);
                        if (msg)
                        {
                                int m = strlen(msg);
                                if (m + 4 > sizeof(buf))
                                    m = sizeof(buf) - 4;
 
                        if (msg)
                        {
                                int m = strlen(msg);
                                if (m + 4 > sizeof(buf))
                                    m = sizeof(buf) - 4;
 
-                               memcpy(buf+4, msg, m);
+                               memcpy(buf+2, msg, m);
                                l += m;
                        }
 
                                l += m;
                        }
 
-                       controlb(c, 1, buf, l, 1);
+                       controlb(c, 1, (uint8_t *)buf, l, 1);
                }
                else
                        control16(c, 1, result, 1);
                }
                else
                        control16(c, 1, result, 1);
@@ -2559,7 +2668,7 @@ 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 = %u (%s)\n", *b, l2tp_code(message));
+                                       LOG(4, s, t, "   Message type = %u (%s)\n", message, l2tp_code(message));
                                        break;
                                case 1:     // result code
                                        {
                                        break;
                                case 1:     // result code
                                        {
@@ -2654,6 +2763,15 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                        }
                                        break;
                                case 13:    // Response
                                        }
                                        break;
                                case 13:    // Response
+#ifdef LAC
+                                       if (tunnel[t].isremotelns)
+                                       {
+                                               chapresponse = calloc(17, 1);
+                                               memcpy(chapresponse, b, (n < 17) ? n : 16);
+                                               LOG(3, s, t, "received challenge response from REMOTE LNS\n");
+                                       }
+                                       else
+#endif /* LAC */
                                        // Why did they send a response? We never challenge.
                                        LOG(2, s, t, "   received unexpected challenge response\n");
                                        break;
                                        // Why did they send a response? We never challenge.
                                        LOG(2, s, t, "   received unexpected challenge response\n");
                                        break;
@@ -2879,8 +2997,10 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                {
                                case 1:       // SCCRQ - Start Control Connection Request
                                        tunnel[t].state = TUNNELOPENING;
                                {
                                case 1:       // SCCRQ - Start Control Connection Request
                                        tunnel[t].state = TUNNELOPENING;
+                                       LOG(3, s, t, "Received SCCRQ\n");
                                        if (main_quit != QUIT_SHUTDOWN)
                                        {
                                        if (main_quit != QUIT_SHUTDOWN)
                                        {
+                                               LOG(3, s, t, "sending SCCRP\n");
                                                controlt *c = controlnew(2); // sending SCCRP
                                                control16(c, 2, version, 1); // protocol version
                                                control32(c, 3, 3, 1); // framing
                                                controlt *c = controlnew(2); // sending SCCRP
                                                control16(c, 2, version, 1); // protocol version
                                                control32(c, 3, 3, 1); // framing
@@ -2897,13 +3017,47 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                case 2:       // SCCRP
                                        tunnel[t].state = TUNNELOPEN;
                                        tunnel[t].lastrec = time_now;
                                case 2:       // SCCRP
                                        tunnel[t].state = TUNNELOPEN;
                                        tunnel[t].lastrec = time_now;
+#ifdef LAC
+                                       LOG(3, s, t, "Received SCCRP\n");
+                                       if (main_quit != QUIT_SHUTDOWN)
+                                       {
+                                               if (tunnel[t].isremotelns && chapresponse)
+                                               {
+                                                       hasht hash;
+
+                                                       lac_calc_rlns_auth(t, 2, hash); // id = 2 (SCCRP)
+                                                       // check authenticator
+                                                       if (memcmp(hash, chapresponse, 16) == 0)
+                                                       {
+                                                               LOG(3, s, t, "sending SCCCN to REMOTE LNS\n");
+                                                               controlt *c = controlnew(3); // sending SCCCN
+                                                               controls(c, 7, hostname, 1); // host name
+                                                               controls(c, 8, Vendor_name, 1); // Vendor name
+                                                               control16(c, 2, version, 1); // protocol version
+                                                               control32(c, 3, 3, 1); // framing Capabilities
+                                                               control16(c, 9, t, 1); // assigned tunnel
+                                                               controladd(c, 0, t); // send
+                                                       }
+                                                       else
+                                                       {
+                                                               tunnelshutdown(t, "Bad chap response from REMOTE LNS", 4, 0, 0);
+                                                       }
+                                               }
+                                       }
+                                       else
+                                       {
+                                               tunnelshutdown(t, "Shutting down", 6, 0, 0);
+                                       }
+#endif /* LAC */
                                        break;
                                case 3:       // SCCN
                                        break;
                                case 3:       // SCCN
+                                       LOG(3, s, t, "Received SCCN\n");
                                        tunnel[t].state = TUNNELOPEN;
                                        tunnel[t].lastrec = time_now;
                                        controlnull(t); // ack
                                        break;
                                case 4:       // StopCCN
                                        tunnel[t].state = TUNNELOPEN;
                                        tunnel[t].lastrec = time_now;
                                        controlnull(t); // ack
                                        break;
                                case 4:       // StopCCN
+                                       LOG(3, s, t, "Received StopCCN\n");
                                        controlnull(t); // ack
                                        tunnelshutdown(t, "Stopped", 0, 0, 0); // Shut down cleanly
                                        break;
                                        controlnull(t); // ack
                                        tunnelshutdown(t, "Stopped", 0, 0, 0); // Shut down cleanly
                                        break;
@@ -2912,18 +3066,24 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                        break;
                                case 7:       // OCRQ
                                        // TBA
                                        break;
                                case 7:       // OCRQ
                                        // TBA
+                                       LOG(3, s, t, "Received OCRQ\n");
                                        break;
                                case 8:       // OCRO
                                        // TBA
                                        break;
                                case 8:       // OCRO
                                        // TBA
+                                       LOG(3, s, t, "Received OCRO\n");
                                        break;
                                case 9:       // OCCN
                                        // TBA
                                        break;
                                case 9:       // OCCN
                                        // TBA
+                                       LOG(3, s, t, "Received OCCN\n");
                                        break;
                                case 10:      // ICRQ
                                        break;
                                case 10:      // ICRQ
+                                       LOG(3, s, t, "Received ICRQ\n");
                                        if (sessionfree && main_quit != QUIT_SHUTDOWN)
                                        {
                                                controlt *c = controlnew(11); // ICRP
 
                                        if (sessionfree && main_quit != QUIT_SHUTDOWN)
                                        {
                                                controlt *c = controlnew(11); // ICRP
 
+                                               LOG(3, s, t, "Sending ICRP\n");
+
                                                s = sessionfree;
                                                sessionfree = session[s].next;
                                                memset(&session[s], 0, sizeof(session[s]));
                                                s = sessionfree;
                                                sessionfree = session[s].next;
                                                memset(&session[s], 0, sizeof(session[s]));
@@ -2951,6 +3111,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 
                                        {
                                                controlt *c = controlnew(14); // CDN
 
                                        {
                                                controlt *c = controlnew(14); // CDN
+                                               LOG(3, s, t, "Sending CDN\n");
                                                if (!sessionfree)
                                                {
                                                        STAT(session_overflow);
                                                if (!sessionfree)
                                                {
                                                        STAT(session_overflow);
@@ -2964,9 +3125,26 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                        }
                                        return;
                                case 11:      // ICRP
                                        }
                                        return;
                                case 11:      // ICRP
-                                       // TBA
+#ifdef LAC
+                               LOG(3, s, t, "Received ICRP\n");
+                               if (session[s].forwardtosession)
+                               {
+                                       controlt *c = controlnew(12); // ICCN
+
+                                       session[s].opened = time_now;
+                                       session[s].tunnel = t;
+                                       session[s].far = asession;
+                                       session[s].last_packet = session[s].last_data = time_now;
+
+                                       control32(c, 19, 1, 1); // Framing Type
+                                       control32(c, 24, 10000000, 1); // Tx Connect Speed
+                                       controladd(c, asession, t); // send the message
+                                       LOG(3, s, t, "Sending ICCN\n");
+                               }
+#endif /* LAC */
                                        break;
                                case 12:      // ICCN
                                        break;
                                case 12:      // ICCN
+                                       LOG(3, s, t, "Received ICCN\n");
                                        if (amagic == 0) amagic = time_now;
                                        session[s].magic = amagic; // set magic number
                                        session[s].flags = aflags; // set flags received
                                        if (amagic == 0) amagic = time_now;
                                        session[s].magic = amagic; // set magic number
                                        session[s].flags = aflags; // set flags received
@@ -2979,13 +3157,14 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 
                                        // Set multilink options before sending initial LCP packet
                                        sess_local[s].mp_mrru = 1614;
 
                                        // 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;
+                                       sess_local[s].mp_epdis = ntohl(config->bind_address ? config->bind_address : my_address);
 
                                        sendlcp(s, t);
                                        change_state(s, lcp, RequestSent);
                                        break;
 
                                case 14:      // CDN
 
                                        sendlcp(s, t);
                                        change_state(s, lcp, RequestSent);
                                        break;
 
                                case 14:      // CDN
+                                       LOG(3, s, t, "Received CDN\n");
                                        controlnull(t); // ack
                                        sessionshutdown(s, disc_reason, CDN_NONE, disc_cause);
                                        break;
                                        controlnull(t); // ack
                                        sessionshutdown(s, disc_reason, CDN_NONE, disc_cause);
                                        break;
@@ -3036,6 +3215,16 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                        l -= 2;
                }
 
                        l -= 2;
                }
 
+#ifdef LAC
+               if (session[s].forwardtosession)
+               {
+                       LOG(5, s, t, "Forwarding data session to session %u\n", session[s].forwardtosession);
+                       // Forward to LAC or Remote LNS session
+                       lac_session_forward(buf, len, s, proto);
+                       return;
+               }
+#endif /* LAC */
+
                if (s && !session[s].opened)    // Is something wrong??
                {
                        if (!config->cluster_iam_master)
                if (s && !session[s].opened)    // Is something wrong??
                {
                        if (!config->cluster_iam_master)
@@ -3045,7 +3234,6 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                                return;
                        }
 
                                return;
                        }
 
-
                        LOG(1, s, t, "UDP packet contains session which is not opened.  Dropping packet.\n");
                        STAT(tunnel_rx_errors);
                        return;
                        LOG(1, s, t, "UDP packet contains session which is not opened.  Dropping packet.\n");
                        STAT(tunnel_rx_errors);
                        return;
@@ -3113,8 +3301,9 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
                        }
 
                        session[s].last_packet = session[s].last_data = time_now;
                        }
 
                        session[s].last_packet = session[s].last_data = time_now;
-                       if (session[s].walled_garden && !config->cluster_iam_master)
+                       if (!config->cluster_iam_master)
                        {
                        {
+                               // The fragments reconstruction is managed by the Master.
                                master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port);
                                return;
                        }
                                master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port);
                                return;
                        }
@@ -3153,6 +3342,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 }
 
 // read and process packet on tun
 }
 
 // read and process packet on tun
+// (i.e. this routine writes to buf[-8]).
 static void processtun(uint8_t * buf, int len)
 {
        LOG_HEX(5, "Receive TUN Data", buf, len);
 static void processtun(uint8_t * buf, int len)
 {
        LOG_HEX(5, "Receive TUN Data", buf, len);
@@ -3426,8 +3616,8 @@ static void regular_cleanups(double period)
                        }
                }
 
                        }
                }
 
-               // Drop sessions who have not responded within IDLE_TIMEOUT seconds
-               if (session[s].last_packet && (time_now - session[s].last_packet >= IDLE_TIMEOUT))
+               // Drop sessions who have not responded within IDLE_ECHO_TIMEOUT seconds
+               if (session[s].last_packet && (time_now - session[s].last_packet >= config->idle_echo_timeout))
                {
                        sessionshutdown(s, "No response to LCP ECHO requests.", CDN_ADMIN_DISC, TERM_LOST_SERVICE);
                        STAT(session_timeout);
                {
                        sessionshutdown(s, "No response to LCP ECHO requests.", CDN_ADMIN_DISC, TERM_LOST_SERVICE);
                        STAT(session_timeout);
@@ -3436,7 +3626,7 @@ static void regular_cleanups(double period)
                }
 
                // No data in ECHO_TIMEOUT seconds, send LCP ECHO
                }
 
                // No data in ECHO_TIMEOUT seconds, send LCP ECHO
-               if (session[s].ppp.phase >= Establish && (time_now - session[s].last_packet >= ECHO_TIMEOUT) &&
+               if (session[s].ppp.phase >= Establish && (time_now - session[s].last_packet >= config->echo_timeout) &&
                        (time_now - sess_local[s].last_echo >= ECHO_TIMEOUT))
                {
                        uint8_t b[MAXETHER];
                        (time_now - sess_local[s].last_echo >= ECHO_TIMEOUT))
                {
                        uint8_t b[MAXETHER];
@@ -3702,8 +3892,13 @@ static int still_busy(void)
 # include "fake_epoll.h"
 #endif
 
 # include "fake_epoll.h"
 #endif
 
+#ifdef LAC
+// the base set of fds polled: cli, cluster, tun, udp, control, dae, netlink, udplac
+#define BASE_FDS       8
+#else
 // the base set of fds polled: cli, cluster, tun, udp, control, dae, netlink
 #define BASE_FDS       7
 // the base set of fds polled: cli, cluster, tun, udp, control, dae, netlink
 #define BASE_FDS       7
+#endif
 
 // additional polled fds
 #ifdef BGP
 
 // additional polled fds
 #ifdef BGP
@@ -3717,6 +3912,8 @@ static void mainloop(void)
 {
        int i;
        uint8_t buf[65536];
 {
        int i;
        uint8_t buf[65536];
+       uint8_t *p = buf + 8; // for the hearder of the forwarded MPPP packet (see C_MPPP_FORWARD)
+       int size_bufp = sizeof(buf) - 8;
        clockt next_cluster_ping = 0;   // send initial ping immediately
        struct epoll_event events[BASE_FDS + RADIUS_FDS + EXTRA_FDS];
        int maxevent = sizeof(events)/sizeof(*events);
        clockt next_cluster_ping = 0;   // send initial ping immediately
        struct epoll_event events[BASE_FDS + RADIUS_FDS + EXTRA_FDS];
        int maxevent = sizeof(events)/sizeof(*events);
@@ -3727,8 +3924,13 @@ static void mainloop(void)
                exit(1);
        }
 
                exit(1);
        }
 
+#ifdef LAC
+       LOG(4, 0, 0, "Beginning of main loop.  clifd=%d, cluster_sockfd=%d, tunfd=%d, udpfd=%d, controlfd=%d, daefd=%d, nlfd=%d , udplacfd=%d\n",
+               clifd, cluster_sockfd, tunfd, udpfd, controlfd, daefd, nlfd, udplacfd);
+#else
        LOG(4, 0, 0, "Beginning of main loop.  clifd=%d, cluster_sockfd=%d, tunfd=%d, udpfd=%d, controlfd=%d, daefd=%d, nlfd=%d\n",
                clifd, cluster_sockfd, tunfd, udpfd, controlfd, daefd, nlfd);
        LOG(4, 0, 0, "Beginning of main loop.  clifd=%d, cluster_sockfd=%d, tunfd=%d, udpfd=%d, controlfd=%d, daefd=%d, nlfd=%d\n",
                clifd, cluster_sockfd, tunfd, udpfd, controlfd, daefd, nlfd);
+#endif
 
        /* setup our fds to poll for input */
        {
 
        /* setup our fds to poll for input */
        {
@@ -3768,6 +3970,12 @@ static void mainloop(void)
                d[i].type = FD_TYPE_NETLINK;
                e.data.ptr = &d[i++];
                epoll_ctl(epollfd, EPOLL_CTL_ADD, nlfd, &e);
                d[i].type = FD_TYPE_NETLINK;
                e.data.ptr = &d[i++];
                epoll_ctl(epollfd, EPOLL_CTL_ADD, nlfd, &e);
+
+#ifdef LAC
+               d[i].type = FD_TYPE_UDPLAC;
+               e.data.ptr = &d[i++];
+               epoll_ctl(epollfd, EPOLL_CTL_ADD, udplacfd, &e);
+#endif
        }
 
 #ifdef BGP
        }
 
 #ifdef BGP
@@ -3830,6 +4038,10 @@ static void mainloop(void)
                        socklen_t alen;
                        int c, s;
                        int udp_ready = 0;
                        socklen_t alen;
                        int c, s;
                        int udp_ready = 0;
+#ifdef LAC
+                       int udplac_ready = 0;
+                       int udplac_pkts = 0;
+#endif
                        int tun_ready = 0;
                        int cluster_ready = 0;
                        int udp_pkts = 0;
                        int tun_ready = 0;
                        int cluster_ready = 0;
                        int udp_pkts = 0;
@@ -3867,7 +4079,9 @@ static void mainloop(void)
                                case FD_TYPE_CLUSTER:   cluster_ready++; break;
                                case FD_TYPE_TUN:       tun_ready++; break;
                                case FD_TYPE_UDP:       udp_ready++; break;
                                case FD_TYPE_CLUSTER:   cluster_ready++; break;
                                case FD_TYPE_TUN:       tun_ready++; break;
                                case FD_TYPE_UDP:       udp_ready++; break;
-
+#ifdef LAC
+                               case FD_TYPE_UDPLAC:    udplac_ready++; break;
+#endif
                                case FD_TYPE_CONTROL: // nsctl commands
                                        alen = sizeof(addr);
                                        s = recvfromto(controlfd, buf, sizeof(buf), MSG_WAITALL, (struct sockaddr *) &addr, &alen, &local);
                                case FD_TYPE_CONTROL: // nsctl commands
                                        alen = sizeof(addr);
                                        s = recvfromto(controlfd, buf, sizeof(buf), MSG_WAITALL, (struct sockaddr *) &addr, &alen, &local);
@@ -3957,13 +4171,31 @@ static void mainloop(void)
                                                n--;
                                        }
                                }
                                                n--;
                                        }
                                }
+#ifdef LAC
+                               // L2TP REMOTE LNS
+                               if (udplac_ready)
+                               {
+                                       alen = sizeof(addr);
+                                       if ((s = recvfrom(udplacfd, buf, sizeof(buf), 0, (void *) &addr, &alen)) > 0)
+                                       {
+                                               if (!config->disable_lac_func)
+                                                       processudp(buf, s, &addr);
 
 
+                                               udplac_pkts++;
+                                       }
+                                       else
+                                       {
+                                               udplac_ready = 0;
+                                               n--;
+                                       }
+                               }
+#endif
                                // incoming IP
                                if (tun_ready)
                                {
                                // incoming IP
                                if (tun_ready)
                                {
-                                       if ((s = read(tunfd, buf, sizeof(buf))) > 0)
+                                       if ((s = read(tunfd, p, size_bufp)) > 0)
                                        {
                                        {
-                                               processtun(buf, s);
+                                               processtun(p, s);
                                                tun_pkts++;
                                        }
                                        else
                                                tun_pkts++;
                                        }
                                        else
@@ -3995,9 +4227,13 @@ static void mainloop(void)
 
                        if (c >= config->multi_read_count)
                        {
 
                        if (c >= config->multi_read_count)
                        {
+#ifdef LAC
+                               LOG(3, 0, 0, "Reached multi_read_count (%d); processed %d udp, %d tun and %d cluster %d rmlns packets\n",
+                                       config->multi_read_count, udp_pkts, tun_pkts, cluster_pkts, udplac_pkts);
+#else
                                LOG(3, 0, 0, "Reached multi_read_count (%d); processed %d udp, %d tun and %d cluster packets\n",
                                        config->multi_read_count, udp_pkts, tun_pkts, cluster_pkts);
                                LOG(3, 0, 0, "Reached multi_read_count (%d); processed %d udp, %d tun and %d cluster packets\n",
                                        config->multi_read_count, udp_pkts, tun_pkts, cluster_pkts);
-
+#endif
                                STAT(multi_read_exceeded);
                                more++;
                        }
                                STAT(multi_read_exceeded);
                                more++;
                        }
@@ -4212,6 +4448,9 @@ static void initdata(int optdebug, char *optconfig)
        config->ppp_max_failure = 5;
        config->kill_timedout_sessions = 1;
        strcpy(config->random_device, RANDOMDEVICE);
        config->ppp_max_failure = 5;
        config->kill_timedout_sessions = 1;
        strcpy(config->random_device, RANDOMDEVICE);
+       // Set default value echo_timeout and idle_echo_timeout
+       config->echo_timeout = ECHO_TIMEOUT;
+       config->idle_echo_timeout = IDLE_ECHO_TIMEOUT;
 
        log_stream = stderr;
 
 
        log_stream = stderr;
 
@@ -4314,14 +4553,9 @@ static void initdata(int optdebug, char *optconfig)
 
        if (!*hostname)
        {
 
        if (!*hostname)
        {
-               if (!*config->hostname)
-               {
-                       // Grab my hostname unless it's been specified
-                       gethostname(hostname, sizeof(hostname));
-                       stripdomain(hostname);
-               }
-               else
-                       strcpy(hostname, config->hostname);
+               // Grab my hostname unless it's been specified
+               gethostname(hostname, sizeof(hostname));
+               stripdomain(hostname);
        }
 
        _statistics->start_time = _statistics->last_reset = time(NULL);
        }
 
        _statistics->start_time = _statistics->last_reset = time(NULL);
@@ -4333,6 +4567,10 @@ static void initdata(int optdebug, char *optconfig)
                exit(1);
        }
 #endif /* BGP */
                exit(1);
        }
 #endif /* BGP */
+
+#ifdef LAC
+       lac_initremotelnsdata();
+#endif
 }
 
 static int assign_ip_address(sessionidt s)
 }
 
 static int assign_ip_address(sessionidt s)
@@ -4619,7 +4857,11 @@ void snoop_send_packet(uint8_t *packet, uint16_t size, in_addr_t destination, ui
 
 static int dump_session(FILE **f, sessiont *s)
 {
 
 static int dump_session(FILE **f, sessiont *s)
 {
+#ifdef LAC
+       if (!s->opened || (!s->ip && !s->forwardtosession) || !(s->cin_delta || s->cout_delta) || !*s->user || s->walled_garden)
+#else
        if (!s->opened || !s->ip || !(s->cin_delta || s->cout_delta) || !*s->user || s->walled_garden)
        if (!s->opened || !s->ip || !(s->cin_delta || s->cout_delta) || !*s->user || s->walled_garden)
+#endif
                return 1;
 
        if (!*f)
                return 1;
 
        if (!*f)
@@ -4736,8 +4978,12 @@ int main(int argc, char *argv[])
        initplugins();
        initdata(optdebug, optconfig);
 
        initplugins();
        initdata(optdebug, optconfig);
 
-       init_cli(hostname);
+       init_cli();
        read_config_file();
        read_config_file();
+       /* set hostname /after/ having read the config file */
+       if (*config->hostname)
+               strcpy(hostname, config->hostname);
+       cli_init_complete(hostname);
        update_config();
        init_tbf(config->num_tbfs);
 
        update_config();
        init_tbf(config->num_tbfs);
 
@@ -5022,6 +5268,11 @@ static void update_config()
        if (!config->radius_dae_port)
                config->radius_dae_port = DAEPORT;
 
        if (!config->radius_dae_port)
                config->radius_dae_port = DAEPORT;
 
+#ifdef LAC
+       if(!config->bind_portremotelns)
+               config->bind_portremotelns = L2TPLACPORT;
+#endif
+
        // re-initialise the random number source
        initrandom(config->random_device);
 
        // re-initialise the random number source
        initrandom(config->random_device);
 
@@ -5156,18 +5407,18 @@ int sessionsetup(sessionidt s, tunnelidt t)
        LOG(3, s, t, "Doing session setup for session\n");
 
        // Join a bundle if the MRRU option is accepted
        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);
+       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;
                }
                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)
        {
 
        if (!session[s].ip)
        {
@@ -5182,7 +5433,6 @@ int sessionsetup(sessionidt s, tunnelidt t)
                        fmtaddr(htonl(session[s].ip), 0));
        }
 
                        fmtaddr(htonl(session[s].ip), 0));
        }
 
-
        // Make sure this is right
        session[s].tunnel = t;
 
        // Make sure this is right
        session[s].tunnel = t;
 
@@ -5195,13 +5445,14 @@ int sessionsetup(sessionidt s, tunnelidt t)
                for (i = 1; i <= config->cluster_highest_sessionid; i++)
                {
                        if (i == s) continue;
                for (i = 1; i <= config->cluster_highest_sessionid; i++)
                {
                        if (i == s) continue;
-                       if (!session[s].opened) continue;
+                       if (!session[s].opened) break;
                        // Allow duplicate sessions for multilink ones of the same bundle.
                        // 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 (session[s].bundle && session[i].bundle && session[s].bundle == session[i].bundle) continue;
+
                        if (ip == session[i].ip)
                        {
                                sessionkill(i, "Duplicate IP address");
                        if (ip == session[i].ip)
                        {
                                sessionkill(i, "Duplicate IP address");
+                               cluster_listinvert_session(s, i);
                                continue;
                        }
 
                                continue;
                        }
 
@@ -5209,16 +5460,16 @@ int sessionsetup(sessionidt s, tunnelidt t)
                        if (session[s].walled_garden || session[i].walled_garden) continue;
                        // Guest change
                        int found = 0;
                        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;
+                       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))
 
                        // Drop the new session in case of duplicate sessionss, not the old one.
                        if (!strcasecmp(user, session[i].user))
@@ -5229,7 +5480,7 @@ int sessionsetup(sessionidt s, tunnelidt t)
        // 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))
        {
        // no need to set a route for the same IP address of the bundle
        if (!session[s].bundle || (bundle[session[s].bundle].num_of_links == 1))
        {
-               int routed = 0;
+               int routed = 0;
 
                // Add the route for this session.
                for (r = 0; r < MAXROUTE && session[s].route[r].ip; r++)
 
                // Add the route for this session.
                for (r = 0; r < MAXROUTE && session[s].route[r].ip; r++)
@@ -6075,3 +6326,52 @@ int ip_filter(uint8_t *buf, int len, uint8_t filter)
        // default deny
        return 0;
 }
        // default deny
        return 0;
 }
+
+#ifdef LAC
+
+tunnelidt lac_new_tunnel()
+{
+       return new_tunnel();
+}
+
+void lac_tunnelclear(tunnelidt t)
+{
+       tunnelclear(t);
+}
+
+void lac_send_SCCRQ(tunnelidt t, uint8_t * auth, unsigned int auth_len)
+{
+       uint16_t version = 0x0100;      // protocol version
+
+       tunnel[t].state = TUNNELOPENING;
+
+       // Sent SCCRQ - Start Control Connection Request
+       controlt *c = controlnew(1); // sending SCCRQ
+       controls(c, 7, hostname, 1); // host name
+       controls(c, 8, Vendor_name, 1); // Vendor name
+       control16(c, 2, version, 1); // protocol version
+       control32(c, 3, 3, 1); // framing Capabilities
+       control16(c, 9, t, 1); // assigned tunnel
+       controlb(c, 11, (uint8_t *) auth, auth_len, 1);  // CHAP Challenge
+       LOG(3, 0, t, "Sent SCCRQ to REMOTE LNS\n");
+       controladd(c, 0, t); // send
+}
+
+void lac_send_ICRQ(tunnelidt t, sessionidt s)
+{
+       // Sent ICRQ  Incoming-call-request
+       controlt *c = controlnew(10); // ICRQ
+
+       control16(c, 14, s, 1); // assigned sesion
+       call_serial_number++;
+       control32(c, 15, call_serial_number, 1);  // call serial number
+       LOG(3, s, t, "Sent ICRQ to REMOTE LNS (far ID %u)\n", tunnel[t].far);
+       controladd(c, 0, t); // send
+}
+
+void lac_tunnelshutdown(tunnelidt t, char *reason, int result, int error, char *msg)
+{
+       tunnelshutdown(t, reason, result, error, msg);
+}
+
+#endif