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merge cluster fixes from release_2_0 branch
[l2tpns.git] / l2tpns.c
diff --git a/l2tpns.c b/l2tpns.c
index 933c07b..f30ada8 100644 (file)
--- a/l2tpns.c
+++ b/l2tpns.c
@@ -4,7 +4,7 @@
 // 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 1.89 2005-04-01 06:39:00 bodea Exp $";
+char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.105 2005-05-26 12:17:30 bodea Exp $";
 
 #include <arpa/inet.h>
 #include <assert.h>
 
 #include <arpa/inet.h>
 #include <assert.h>
@@ -68,11 +68,10 @@ static int rand_fd = -1;    // Random data source
 time_t basetime = 0;           // base clock
 char hostname[1000] = "";      // us.
 static int tunidx;             // ifr_ifindex of tun device
 time_t basetime = 0;           // base clock
 char hostname[1000] = "";      // us.
 static int tunidx;             // ifr_ifindex of tun device
-static uint32_t sessionid = 0; // session id for radius accounting
 static int syslog_log = 0;     // are we logging to syslog
 static int syslog_log = 0;     // are we logging to syslog
-static FILE *log_stream = NULL;        // file handle for direct logging (i.e. direct into file, not via syslog).
+static FILE *log_stream = 0;   // file handle for direct logging (i.e. direct into file, not via syslog).
 extern int cluster_sockfd;     // Intra-cluster communications socket.
 extern int cluster_sockfd;     // Intra-cluster communications socket.
-uint32_t last_id = 0;          // Last used PPP SID. Can I kill this?? -- mo
+uint32_t last_id = 0;          // Unique ID for radius accounting
 
 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
@@ -111,6 +110,7 @@ config_descriptt config_values[] = {
        CONFIG("primary_radius_port", radiusport[0], SHORT),
        CONFIG("secondary_radius_port", radiusport[1], SHORT),
        CONFIG("radius_accounting", radius_accounting, BOOL),
        CONFIG("primary_radius_port", radiusport[0], SHORT),
        CONFIG("secondary_radius_port", radiusport[1], SHORT),
        CONFIG("radius_accounting", radius_accounting, BOOL),
+       CONFIG("radius_interim", radius_interim, INT),
        CONFIG("radius_secret", radiussecret, STRING),
        CONFIG("radius_authtypes", radius_authtypes_s, STRING),
        CONFIG("bind_address", bind_address, IPv4),
        CONFIG("radius_secret", radiussecret, STRING),
        CONFIG("radius_authtypes", radius_authtypes_s, STRING),
        CONFIG("bind_address", bind_address, IPv4),
@@ -131,6 +131,7 @@ config_descriptt config_values[] = {
        CONFIG("cluster_interface", cluster_interface, STRING),
        CONFIG("cluster_hb_interval", cluster_hb_interval, INT),
        CONFIG("cluster_hb_timeout", cluster_hb_timeout, INT),
        CONFIG("cluster_interface", cluster_interface, STRING),
        CONFIG("cluster_hb_interval", cluster_hb_interval, INT),
        CONFIG("cluster_hb_timeout", cluster_hb_timeout, INT),
+       CONFIG("cluster_master_min_adv", cluster_master_min_adv, INT),
        CONFIG("ipv6_prefix", ipv6_prefix, IPv6),
        { NULL, 0, 0, 0 },
 };
        CONFIG("ipv6_prefix", ipv6_prefix, IPv6),
        { NULL, 0, 0, 0 },
 };
@@ -1323,11 +1324,11 @@ static void controlnull(tunnelidt t)
 }
 
 // add a control message to a tunnel, and send if within window
 }
 
 // add a control message to a tunnel, and send if within window
-static void controladd(controlt * c, tunnelidt t, sessionidt s)
+static void controladd(controlt * c, tunnelidt t, sessionidt far)
 {
        *(uint16_t *) (c->buf + 2) = htons(c->length); // length
        *(uint16_t *) (c->buf + 4) = htons(tunnel[t].far); // tunnel
 {
        *(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(s ? session[s].far : 0); // session
+       *(uint16_t *) (c->buf + 6) = htons(far); // session
        *(uint16_t *) (c->buf + 8) = htons(tunnel[t].ns); // sequence
        tunnel[t].ns++;              // advance sequence
        // link in message in to queue
        *(uint16_t *) (c->buf + 8) = htons(tunnel[t].ns); // sequence
        tunnel[t].ns++;              // advance sequence
        // link in message in to queue
@@ -1456,22 +1457,18 @@ void sessionshutdown(sessionidt s, char *reason, int result, int error)
        if (session[s].ip && !walled_garden && !session[s].die)
        {
                // RADIUS Stop message
        if (session[s].ip && !walled_garden && !session[s].die)
        {
                // RADIUS Stop message
-               uint16_t r = session[s].radius;
+               uint16_t r = sess_local[s].radius;
                if (!r)
                if (!r)
+                       r = radiusnew(s);
+
+               if (r)
                {
                {
-                       if (!(r = radiusnew(s)))
-                       {
-                               LOG(1, s, session[s].tunnel, "No free RADIUS sessions for Stop message\n");
-                               STAT(radius_overflow);
-                       }
-                       else
-                       {
-                               random_data(radius[r].auth, sizeof(radius[r].auth));
-                       }
+                       // stop, if not already trying
+                       if (radius[r].state != RADIUSSTOP)
+                               radiussend(r, RADIUSSTOP);
                }
                }
-
-               if (r && radius[r].state != RADIUSSTOP)
-                       radiussend(r, RADIUSSTOP); // stop, if not already trying
+               else
+                       LOG(1, s, session[s].tunnel, "No free RADIUS sessions for Stop message\n");
 
                // Save counters to dump to accounting file
                if (*config->accounting_dir && shut_acct_n < sizeof(shut_acct) / sizeof(*shut_acct))
 
                // Save counters to dump to accounting file
                if (*config->accounting_dir && shut_acct_n < sizeof(shut_acct) / sizeof(*shut_acct))
@@ -1522,7 +1519,7 @@ void sessionshutdown(sessionidt s, char *reason, int result, int error)
                        control16(c, 1, result, 1);
 
                control16(c, 14, s, 1);   // assigned session (our end)
                        control16(c, 1, result, 1);
 
                control16(c, 14, s, 1);   // assigned session (our end)
-               controladd(c, session[s].tunnel, s); // send the message
+               controladd(c, session[s].tunnel, session[s].far); // send the message
        }
 
        if (!session[s].die)
        }
 
        if (!session[s].die)
@@ -1538,7 +1535,7 @@ void sessionshutdown(sessionidt s, char *reason, int result, int error)
 void sendipcp(tunnelidt t, sessionidt s)
 {
        uint8_t buf[MAXCONTROL];
 void sendipcp(tunnelidt t, sessionidt s)
 {
        uint8_t buf[MAXCONTROL];
-       uint16_t r = session[s].radius;
+       uint16_t r = sess_local[s].radius;
        uint8_t *q;
 
        CSTAT(sendipcp);
        uint8_t *q;
 
        CSTAT(sendipcp);
@@ -1546,6 +1543,12 @@ void sendipcp(tunnelidt t, sessionidt s)
        if (!r)
                r = radiusnew(s);
 
        if (!r)
                r = radiusnew(s);
 
+       if (!r)
+       {
+               sessionshutdown(s, "No free RADIUS sessions for IPCP", 3, 0);
+               return;
+       }
+
        if (radius[r].state != RADIUSIPCP)
        {
                radius[r].state = RADIUSIPCP;
        if (radius[r].state != RADIUSIPCP)
        {
                radius[r].state = RADIUSIPCP;
@@ -1556,7 +1559,7 @@ void sendipcp(tunnelidt t, sessionidt s)
        if (radius[r].try > 10)
        {
                radiusclear(r, s);      // Clear radius session.
        if (radius[r].try > 10)
        {
                radiusclear(r, s);      // Clear radius session.
-               sessionshutdown(s, "No reply on IPCP", 3, 0);
+               sessionshutdown(s, "No reply to IPCP.", 3, 0);
                return;
        }
 
                return;
        }
 
@@ -1564,7 +1567,7 @@ void sendipcp(tunnelidt t, sessionidt s)
        if (!q) return;
 
        *q = ConfigReq;
        if (!q) return;
 
        *q = ConfigReq;
-       q[1] = r << RADIUS_SHIFT;                    // ID, dont care, we only send one type of request
+       q[1] = r >> RADIUS_SHIFT;                    // ID, dont care, we only send one type of request
        *(uint16_t *) (q + 2) = htons(10);
        q[4] = 3;
        q[5] = 6;
        *(uint16_t *) (q + 2) = htons(10);
        q[4] = 3;
        q[5] = 6;
@@ -1586,7 +1589,7 @@ void sendipcp(tunnelidt t, sessionidt s)
                if (!q) return;
 
                *q = ConfigReq;
                if (!q) return;
 
                *q = ConfigReq;
-               q[1] = r << RADIUS_SHIFT;               // ID, don't care, we
+               q[1] = r >> RADIUS_SHIFT;               // ID, don't care, we
                                                        // only send one type
                                                        // of request
                *(uint16_t *) (q + 2) = htons(14);
                                                        // only send one type
                                                        // of request
                *(uint16_t *) (q + 2) = htons(14);
@@ -1600,6 +1603,17 @@ void sendipcp(tunnelidt t, sessionidt s)
        }
 }
 
        }
 }
 
+static void sessionclear(sessionidt s)
+{
+       memset(&session[s], 0, sizeof(session[s]));
+       memset(&sess_local[s], 0, sizeof(sess_local[s]));
+       memset(&cli_session_actions[s], 0, sizeof(cli_session_actions[s]));
+
+       session[s].tunnel = T_FREE;     // Mark it as free.
+       session[s].next = sessionfree;
+       sessionfree = s;
+}
+
 // kill a session now
 void sessionkill(sessionidt s, char *reason)
 {
 // kill a session now
 void sessionkill(sessionidt s, char *reason)
 {
@@ -1617,16 +1631,11 @@ void sessionkill(sessionidt s, char *reason)
 
        session[s].die = TIME;
        sessionshutdown(s, reason, 3, 0);  // close radius/routes, etc.
 
        session[s].die = TIME;
        sessionshutdown(s, reason, 3, 0);  // close radius/routes, etc.
-       if (session[s].radius)
-               radiusclear(session[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
 
        LOG(2, s, session[s].tunnel, "Kill session %d (%s): %s\n", s, session[s].user, reason);
 
        LOG(2, s, session[s].tunnel, "Kill session %d (%s): %s\n", s, session[s].user, reason);
-
-       memset(&session[s], 0, sizeof(session[s]));
-       session[s].tunnel = T_FREE;     // Mark it as free.
-       session[s].next = sessionfree;
-       sessionfree = s;
-       cli_session_actions[s].action = 0;
+       sessionclear(s);
        cluster_send_session(s);
 }
 
        cluster_send_session(s);
 }
 
@@ -1793,12 +1802,11 @@ void processudp(uint8_t * buf, int len, struct sockaddr_in *addr)
                uint16_t message = 0xFFFF;      // message type
                uint8_t fatal = 0;
                uint8_t mandatory = 0;
                uint16_t message = 0xFFFF;      // message type
                uint8_t fatal = 0;
                uint8_t mandatory = 0;
-               uint8_t chap = 0;               // if CHAP being used
+               uint8_t authtype = 0;           // proxy auth type
                uint16_t asession = 0;          // assigned session
                uint32_t amagic = 0;            // magic number
                uint8_t aflags = 0;             // flags from last LCF
                uint16_t version = 0x0100;      // protocol version (we handle 0.0 as well and send that back just in case)
                uint16_t asession = 0;          // assigned session
                uint32_t amagic = 0;            // magic number
                uint8_t aflags = 0;             // flags from last LCF
                uint16_t version = 0x0100;      // protocol version (we handle 0.0 as well and send that back just in case)
-               int requestchap = 0;            // do we request PAP instead of original CHAP request?
                char called[MAXTEL] = "";       // called number
                char calling[MAXTEL] = "";      // calling number
 
                char called[MAXTEL] = "";       // called number
                char calling[MAXTEL] = "";      // calling number
 
@@ -2081,14 +2089,14 @@ void processudp(uint8_t * buf, int len, struct sockaddr_in *addr)
 //                                     LOG(4, s, t, "Firmware revision\n");
                                        break;
                                case 7:     // host name
 //                                     LOG(4, s, t, "Firmware revision\n");
                                        break;
                                case 7:     // host name
-                                       memset(tunnel[t].hostname, 0, 128);
-                                       memcpy(tunnel[t].hostname, b, (n >= 127) ? 127 : n);
+                                       memset(tunnel[t].hostname, 0, sizeof(tunnel[t].hostname));
+                                       memcpy(tunnel[t].hostname, b, (n < sizeof(tunnel[t].hostname)) ? n : sizeof(tunnel[t].hostname) - 1);
                                        LOG(4, s, t, "   Tunnel hostname = \"%s\"\n", tunnel[t].hostname);
                                        // TBA - to send to RADIUS
                                        break;
                                case 8:     // vendor name
                                        memset(tunnel[t].vendor, 0, sizeof(tunnel[t].vendor));
                                        LOG(4, s, t, "   Tunnel hostname = \"%s\"\n", tunnel[t].hostname);
                                        // TBA - to send to RADIUS
                                        break;
                                case 8:     // vendor name
                                        memset(tunnel[t].vendor, 0, sizeof(tunnel[t].vendor));
-                                       memcpy(tunnel[t].vendor, b, (n >= sizeof(tunnel[t].vendor) - 1) ? sizeof(tunnel[t].vendor) - 1 : n);
+                                       memcpy(tunnel[t].vendor, b, (n < sizeof(tunnel[t].vendor)) ? n : sizeof(tunnel[t].vendor) - 1);
                                        LOG(4, s, t, "   Vendor name = \"%s\"\n", tunnel[t].vendor);
                                        break;
                                case 9:     // assigned tunnel
                                        LOG(4, s, t, "   Vendor name = \"%s\"\n", tunnel[t].vendor);
                                        break;
                                case 9:     // assigned tunnel
@@ -2128,13 +2136,13 @@ void processudp(uint8_t * buf, int len, struct sockaddr_in *addr)
                                        // TBA
                                        break;
                                case 21:    // called number
                                        // TBA
                                        break;
                                case 21:    // called number
-                                       memset(called, 0, MAXTEL);
-                                       memcpy(called, b, (n >= MAXTEL) ? (MAXTEL-1) : n);
+                                       memset(called, 0, sizeof(called));
+                                       memcpy(called, b, (n < sizeof(called)) ? n : sizeof(called) - 1);
                                        LOG(4, s, t, "   Called <%s>\n", called);
                                        break;
                                case 22:    // calling number
                                        LOG(4, s, t, "   Called <%s>\n", called);
                                        break;
                                case 22:    // calling number
-                                       memset(calling, 0, MAXTEL);
-                                       memcpy(calling, b, (n >= MAXTEL) ? (MAXTEL-1) : n);
+                                       memset(calling, 0, sizeof(calling));
+                                       memcpy(calling, b, (n < sizeof(calling)) ? n : sizeof(calling) - 1);
                                        LOG(4, s, t, "   Calling <%s>\n", calling);
                                        break;
                                case 23:    // subtype
                                        LOG(4, s, t, "   Calling <%s>\n", calling);
                                        break;
                                case 23:    // subtype
@@ -2147,8 +2155,9 @@ void processudp(uint8_t * buf, int len, struct sockaddr_in *addr)
                                        else
                                        {
                                                // AS5300s send connect speed as a string
                                        else
                                        {
                                                // AS5300s send connect speed as a string
-                                               char tmp[30] = {0};
-                                               memcpy(tmp, b, (n >= 30) ? 30 : n);
+                                               char tmp[30];
+                                               memset(tmp, 0, sizeof(tmp));
+                                               memcpy(tmp, b, (n < sizeof(tmp)) ? n : sizeof(tmp) - 1);
                                                session[s].tx_connect_speed = atol(tmp);
                                        }
                                        LOG(4, s, t, "   TX connect speed <%u>\n", session[s].tx_connect_speed);
                                                session[s].tx_connect_speed = atol(tmp);
                                        }
                                        LOG(4, s, t, "   TX connect speed <%u>\n", session[s].tx_connect_speed);
@@ -2161,8 +2170,9 @@ void processudp(uint8_t * buf, int len, struct sockaddr_in *addr)
                                        else
                                        {
                                                // AS5300s send connect speed as a string
                                        else
                                        {
                                                // AS5300s send connect speed as a string
-                                               char tmp[30] = {0};
-                                               memcpy(tmp, b, (n >= 30) ? 30 : n);
+                                               char tmp[30];
+                                               memset(tmp, 0, sizeof(tmp));
+                                               memcpy(tmp, b, (n < sizeof(tmp)) ? n : sizeof(tmp) - 1);
                                                session[s].rx_connect_speed = atol(tmp);
                                        }
                                        LOG(4, s, t, "   RX connect speed <%u>\n", session[s].rx_connect_speed);
                                                session[s].rx_connect_speed = atol(tmp);
                                        }
                                        LOG(4, s, t, "   RX connect speed <%u>\n", session[s].rx_connect_speed);
@@ -2177,47 +2187,51 @@ void processudp(uint8_t * buf, int len, struct sockaddr_in *addr)
                                        {
                                                uint16_t atype = ntohs(*(uint16_t *)b);
                                                LOG(4, s, t, "   Proxy Auth Type %d (%s)\n", atype, auth_type(atype));
                                        {
                                                uint16_t atype = ntohs(*(uint16_t *)b);
                                                LOG(4, s, t, "   Proxy Auth Type %d (%s)\n", atype, auth_type(atype));
-                                               requestchap = (atype == 2);
+                                               if (atype == 2)
+                                                       authtype = AUTHCHAP;
+                                               else if (atype == 3)
+                                                       authtype = AUTHPAP;
+
                                                break;
                                        }
                                case 30:    // Proxy Authentication Name
                                        {
                                                break;
                                        }
                                case 30:    // Proxy Authentication Name
                                        {
-                                               char authname[64] = {0};
-                                               memcpy(authname, b, (n > 63) ? 63 : n);
+                                               char authname[64];
+                                               memset(authname, 0, sizeof(authname));
+                                               memcpy(authname, b, (n < sizeof(authname)) ? n : sizeof(authname) - 1);
                                                LOG(4, s, t, "   Proxy Auth Name (%s)\n",
                                                        authname);
                                                break;
                                        }
                                case 31:    // Proxy Authentication Challenge
                                        {
                                                LOG(4, s, t, "   Proxy Auth Name (%s)\n",
                                                        authname);
                                                break;
                                        }
                                case 31:    // Proxy Authentication Challenge
                                        {
-                                               memcpy(radius[session[s].radius].auth, b, 16);
                                                LOG(4, s, t, "   Proxy Auth Challenge\n");
                                                LOG(4, s, t, "   Proxy Auth Challenge\n");
+                                               if (sess_local[s].radius)
+                                                       memcpy(radius[sess_local[s].radius].auth, b, 16);
                                                break;
                                        }
                                case 32:    // Proxy Authentication ID
                                        {
                                                uint16_t authid = ntohs(*(uint16_t *)(b));
                                                LOG(4, s, t, "   Proxy Auth ID (%d)\n", authid);
                                                break;
                                        }
                                case 32:    // Proxy Authentication ID
                                        {
                                                uint16_t authid = ntohs(*(uint16_t *)(b));
                                                LOG(4, s, t, "   Proxy Auth ID (%d)\n", authid);
-                                               if (session[s].radius)
-                                                       radius[session[s].radius].id = authid;
+                                               if (sess_local[s].radius)
+                                                       radius[sess_local[s].radius].id = authid;
                                                break;
                                        }
                                case 33:    // Proxy Authentication Response
                                                break;
                                        }
                                case 33:    // Proxy Authentication Response
-                                       {
-                                               char authresp[64] = {0};
-                                               memcpy(authresp, b, (n > 63) ? 63 : n);
-                                               LOG(4, s, t, "   Proxy Auth Response\n");
-                                               break;
-                                       }
-                               case 27:    // last send lcp
+                                       LOG(4, s, t, "   Proxy Auth Response\n");
+                                       break;
+                               case 27:    // last sent lcp
                                        {        // find magic number
                                                uint8_t *p = b, *e = p + n;
                                                while (p + 1 < e && p[1] && p + p[1] <= e)
                                                {
                                                        if (*p == 5 && p[1] == 6) // Magic-Number
                                                                amagic = ntohl(*(uint32_t *) (p + 2));
                                        {        // find magic number
                                                uint8_t *p = b, *e = p + n;
                                                while (p + 1 < e && p[1] && p + p[1] <= e)
                                                {
                                                        if (*p == 5 && p[1] == 6) // Magic-Number
                                                                amagic = ntohl(*(uint32_t *) (p + 2));
-                                                       else if (*p == 3 && p[1] == 5 && *(uint16_t *) (p + 2) == htons(PPPCHAP) && p[4] == 5) // Authentication-Protocol
-                                                               chap = 1;
+                                                       else if (*p == 3 && p[1] == 4 && *(uint16_t *) (p + 2) == htons(PPPPAP)) // Authentication-Protocol (PAP)
+                                                               authtype = AUTHPAP;
+                                                       else if (*p == 3 && p[1] == 5 && *(uint16_t *) (p + 2) == htons(PPPCHAP) && p[4] == 5) // Authentication-Protocol (CHAP)
+                                                               authtype = AUTHCHAP;
                                                        else if (*p == 7) // Protocol-Field-Compression
                                                                aflags |= SESSIONPFC;
                                                        else if (*p == 8) // Address-and-Control-Field-Compression
                                                        else if (*p == 7) // Protocol-Field-Compression
                                                                aflags |= SESSIONPFC;
                                                        else if (*p == 8) // Address-and-Control-Field-Compression
@@ -2264,7 +2278,7 @@ void processudp(uint8_t * buf, int len, struct sockaddr_in *addr)
                                                controls(c, 7, tunnel[t].hostname, 1); // host name (TBA)
                                                if (chapresponse) controlb(c, 13, chapresponse, 16, 1); // Challenge response
                                                control16(c, 9, t, 1); // assigned tunnel
                                                controls(c, 7, tunnel[t].hostname, 1); // host name (TBA)
                                                if (chapresponse) controlb(c, 13, chapresponse, 16, 1); // Challenge response
                                                control16(c, 9, t, 1); // assigned tunnel
-                                               controladd(c, t, s); // send the resply
+                                               controladd(c, t, 0); // send the resply
                                        }
                                        tunnel[t].state = TUNNELOPENING;
                                        break;
                                        }
                                        tunnel[t].state = TUNNELOPENING;
                                        break;
@@ -2292,16 +2306,9 @@ void processudp(uint8_t * buf, int len, struct sockaddr_in *addr)
                                        // TBA
                                        break;
                                case 10:      // ICRQ
                                        // TBA
                                        break;
                                case 10:      // ICRQ
-                                       if (!sessionfree)
-                                       {
-                                               STAT(session_overflow);
-                                               LOG(1, 0, t, "No free sessions");
-                                               return;
-                                       }
-                                       else
+                                       if (sessionfree)
                                        {
                                                uint16_t r;
                                        {
                                                uint16_t r;
-                                               controlt *c;
 
                                                s = sessionfree;
                                                sessionfree = session[s].next;
 
                                                s = sessionfree;
                                                sessionfree = session[s].next;
@@ -2311,31 +2318,40 @@ void processudp(uint8_t * buf, int len, struct sockaddr_in *addr)
                                                        config->cluster_highest_sessionid = s;
 
                                                // make a RADIUS session
                                                        config->cluster_highest_sessionid = s;
 
                                                // make a RADIUS session
-                                               if (!(r = radiusnew(s)))
+                                               if ((r = radiusnew(s)))
                                                {
                                                {
-                                                       LOG(1, s, t, "No free RADIUS sessions for ICRQ\n");
-                                                       sessionkill(s, "no free RADIUS sesions");
-                                                       return;
+                                                       controlt *c = controlnew(11); // sending ICRP
+                                                       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);
+                                                       control16(c, 14, s, 1); // assigned session
+                                                       controladd(c, t, asession); // send the reply
+
+                                                       strncpy(radius[r].calling, calling, sizeof(radius[r].calling) - 1);
+                                                       strncpy(session[s].called, called, sizeof(session[s].called) - 1);
+                                                       strncpy(session[s].calling, calling, sizeof(session[s].calling) - 1);
+                                                       STAT(session_created);
+                                                       break;
                                                }
 
                                                }
 
-                                               c = controlnew(11); // sending ICRP
-                                               session[s].id = sessionid++;
-                                               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);
-                                               control16(c, 14, s, 1); // assigned session
-                                               controladd(c, t, s); // send the reply
-
-                                               // Generate a random challenge
-                                               random_data(radius[r].auth, sizeof(radius[r].auth));
-                                               strncpy(radius[r].calling, calling, sizeof(radius[r].calling) - 1);
-                                               strncpy(session[s].called, called, sizeof(session[s].called) - 1);
-                                               strncpy(session[s].calling, calling, sizeof(session[s].calling) - 1);
-                                               STAT(session_created);
+
+                                               LOG(1, s, t, "No free RADIUS sessions for ICRQ\n");
+                                               sessionclear(s);
                                        }
                                        }
-                                       break;
+                                       else
+                                       {
+                                               STAT(session_overflow);
+                                               LOG(1, 0, t, "No free sessions\n");
+                                       }
+
+                                       {
+                                               controlt *c = controlnew(14); // CDN
+                                               control16(c, 1, 4, 1); // temporary lack of resources
+                                               controladd(c, session[s].tunnel, asession); // send the message
+                                       }
+                                       return;
                                case 11:      // ICRP
                                        // TBA
                                        break;
                                case 11:      // ICRP
                                        // TBA
                                        break;
@@ -2345,13 +2361,16 @@ void processudp(uint8_t * buf, int len, struct sockaddr_in *addr)
                                        session[s].l2tp_flags = aflags; // set flags received
                                        LOG(3, s, t, "Magic %X Flags %X\n", amagic, aflags);
                                        controlnull(t); // ack
                                        session[s].l2tp_flags = aflags; // set flags received
                                        LOG(3, s, t, "Magic %X Flags %X\n", amagic, aflags);
                                        controlnull(t); // ack
-                                       // In CHAP state, request PAP instead
-                                       if (requestchap)
-                                               initlcp(t, s);
+                                       // proxy authentication type is not supported
+                                       if (!(config->radius_authtypes & authtype))
+                                               authtype = config->radius_authprefer;
+
+                                       // start LCP
+                                       sendlcp(t, s, authtype);
                                        break;
                                case 14:      // CDN
                                        controlnull(t); // ack
                                        break;
                                case 14:      // CDN
                                        controlnull(t); // ack
-                                       sessionshutdown(s, "Closed (Received CDN)", 0, 0);
+                                       sessionshutdown(s, "Closed (Received CDN).", 0, 0);
                                        break;
                                case 0xFFFF:
                                        LOG(1, s, t, "Missing message type\n");
                                        break;
                                case 0xFFFF:
                                        LOG(1, s, t, "Missing message type\n");
@@ -2620,25 +2639,28 @@ static int regular_cleanups(void)
                if (!session[s].opened) // Session isn't in use
                        continue;
 
                if (!session[s].opened) // Session isn't in use
                        continue;
 
-               if (!session[s].die && session[s].ip && !(session[s].flags & SF_IPCP_ACKED))
+               // check for expired sessions
+               if (session[s].die)
                {
                {
-                       // IPCP has not completed yet. Resend
-                       LOG(3, s, session[s].tunnel, "No ACK for initial IPCP ConfigReq... resending\n");
-                       sendipcp(session[s].tunnel, s);
+                       if (session[s].die <= TIME)
+                       {
+                               sessionkill(s, "Expired");
+                               if (++count >= MAX_ACTIONS) break;
+                       }
+                       continue;
                }
 
                }
 
-               // check for expired sessions
-               if (session[s].die && session[s].die <= TIME)
+               if (session[s].ip && !(session[s].flags & SF_IPCP_ACKED))
                {
                {
-                       sessionkill(s, "Expired");
-                       if (++count >= MAX_ACTIONS) break;
-                       continue;
+                       // IPCP has not completed yet. Resend
+                       LOG(3, s, session[s].tunnel, "No ACK for initial IPCP ConfigReq... resending\n");
+                       sendipcp(session[s].tunnel, s);
                }
 
                // 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.", 3, 0);
                        STAT(session_timeout);
                        if (++count >= MAX_ACTIONS) break;
                        continue;
                        STAT(session_timeout);
                        if (++count >= MAX_ACTIONS) break;
                        continue;
@@ -2672,7 +2694,7 @@ static int regular_cleanups(void)
                        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.", 3, 0);
                                a = 0; // dead, no need to check for other actions
                        }
 
                                a = 0; // dead, no need to check for other actions
                        }
 
@@ -2731,6 +2753,29 @@ static int regular_cleanups(void)
 
                        if (++count >= MAX_ACTIONS) break;
                }
 
                        if (++count >= MAX_ACTIONS) break;
                }
+
+               // RADIUS interim accounting
+               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)
+               {
+                       if (!(r = radiusnew(s)))
+                       {
+                               LOG(1, s, session[s].tunnel, "No free RADIUS sessions for Interim message\n");
+                               STAT(radius_overflow);
+                               continue;
+                       }
+
+                       LOG(3, s, session[s].tunnel, "Sending RADIUS Interim for %s (%u)\n",
+                               session[s].user, session[s].unique_id);
+
+                       radiussend(r, RADIUSINTERIM);
+                       sess_local[s].last_interim = time_now;
+
+                       if (++count >= MAX_ACTIONS)
+                               break;
+               }
        }
 
        if (*config->accounting_dir)
        }
 
        if (*config->accounting_dir)
@@ -3143,24 +3188,37 @@ static void initdata(int optdebug, char *optconfig)
 {
        int i;
 
 {
        int i;
 
-       if (!(_statistics = shared_malloc(sizeof(struct Tstats))))
-       {
-               LOG(0, 0, 0, "Error doing malloc for _statistics: %s\n", strerror(errno));
-               exit(1);
-       }
        if (!(config = shared_malloc(sizeof(configt))))
        {
        if (!(config = shared_malloc(sizeof(configt))))
        {
-               LOG(0, 0, 0, "Error doing malloc for configuration: %s\n", strerror(errno));
+               fprintf(stderr, "Error doing malloc for configuration: %s\n", strerror(errno));
                exit(1);
        }
                exit(1);
        }
+
        memset(config, 0, sizeof(configt));
        time(&config->start_time);
        strncpy(config->config_file, optconfig, strlen(optconfig));
        config->debug = optdebug;
        config->num_tbfs = MAXTBFS;
        config->rl_rate = 28; // 28kbps
        memset(config, 0, sizeof(configt));
        time(&config->start_time);
        strncpy(config->config_file, optconfig, strlen(optconfig));
        config->debug = optdebug;
        config->num_tbfs = MAXTBFS;
        config->rl_rate = 28; // 28kbps
+       config->cluster_master_min_adv = 1;
        strcpy(config->random_device, RANDOMDEVICE);
 
        strcpy(config->random_device, RANDOMDEVICE);
 
+       log_stream = stderr;
+
+#ifdef RINGBUFFER
+       if (!(ringbuffer = shared_malloc(sizeof(struct Tringbuffer))))
+       {
+               LOG(0, 0, 0, "Error doing malloc for ringbuffer: %s\n", strerror(errno));
+               exit(1);
+       }
+       memset(ringbuffer, 0, sizeof(struct Tringbuffer));
+#endif
+
+       if (!(_statistics = shared_malloc(sizeof(struct Tstats))))
+       {
+               LOG(0, 0, 0, "Error doing malloc for _statistics: %s\n", strerror(errno));
+               exit(1);
+       }
        if (!(tunnel = shared_malloc(sizeof(tunnelt) * MAXTUNNEL)))
        {
                LOG(0, 0, 0, "Error doing malloc for tunnels: %s\n", strerror(errno));
        if (!(tunnel = shared_malloc(sizeof(tunnelt) * MAXTUNNEL)))
        {
                LOG(0, 0, 0, "Error doing malloc for tunnels: %s\n", strerror(errno));
@@ -3197,15 +3255,6 @@ static void initdata(int optdebug, char *optconfig)
        }
        memset(ip_filters, 0, sizeof(ip_filtert) * MAXFILTER);
 
        }
        memset(ip_filters, 0, sizeof(ip_filtert) * MAXFILTER);
 
-#ifdef RINGBUFFER
-       if (!(ringbuffer = shared_malloc(sizeof(struct Tringbuffer))))
-       {
-               LOG(0, 0, 0, "Error doing malloc for ringbuffer: %s\n", strerror(errno));
-               exit(1);
-       }
-       memset(ringbuffer, 0, sizeof(struct Tringbuffer));
-#endif
-
        if (!(cli_session_actions = shared_malloc(sizeof(struct cli_session_actions) * MAXSESSION)))
        {
                LOG(0, 0, 0, "Error doing malloc for cli session actions: %s\n", strerror(errno));
        if (!(cli_session_actions = shared_malloc(sizeof(struct cli_session_actions) * MAXSESSION)))
        {
                LOG(0, 0, 0, "Error doing malloc for cli session actions: %s\n", strerror(errno));
@@ -3773,9 +3822,11 @@ int main(int argc, char *argv[])
 
 static void sighup_handler(int sig)
 {
 
 static void sighup_handler(int sig)
 {
-       if (log_stream && log_stream != stderr)
+       if (log_stream)
        {
        {
-               fclose(log_stream);
+               if (log_stream != stderr)
+                       fclose(log_stream);
+
                log_stream = NULL;
        }
 
                log_stream = NULL;
        }
 
@@ -3897,7 +3948,9 @@ static void update_config()
        syslog_log = 0;
        if (log_stream)
        {
        syslog_log = 0;
        if (log_stream)
        {
-               fclose(log_stream);
+               if (log_stream != stderr)
+                       fclose(log_stream);
+
                log_stream = NULL;
        }
 
                log_stream = NULL;
        }
 
@@ -3945,7 +3998,7 @@ static void update_config()
                        // test twice, In case someone works with
                        // a secondary radius server without defining
                        // a primary one, this will work even then.
                        // test twice, In case someone works with
                        // a secondary radius server without defining
                        // a primary one, this will work even then.
-                       if (i>0 && !config->radiusport[i])
+                       if (i > 0 && !config->radiusport[i])
                                config->radiusport[i] = config->radiusport[i-1];
                        if (!config->radiusport[i])
                                config->radiusport[i] = RADPORT;
                                config->radiusport[i] = config->radiusport[i-1];
                        if (!config->radiusport[i])
                                config->radiusport[i] = RADPORT;
@@ -3954,12 +4007,12 @@ static void update_config()
        if (!config->numradiusservers)
                LOG(0, 0, 0, "No RADIUS servers defined!\n");
 
        if (!config->numradiusservers)
                LOG(0, 0, 0, "No RADIUS servers defined!\n");
 
-       config->num_radfds = 2 << RADIUS_SHIFT;
+       config->num_radfds = 1 << RADIUS_SHIFT;
 
        // parse radius_authtypes_s
        config->radius_authtypes = config->radius_authprefer = 0;
        p = config->radius_authtypes_s;
 
        // parse radius_authtypes_s
        config->radius_authtypes = config->radius_authprefer = 0;
        p = config->radius_authtypes_s;
-       while (*p)
+       while (p && *p)
        {
                char *s = strpbrk(p, " \t,");
                int type = 0;
        {
                char *s = strpbrk(p, " \t,");
                int type = 0;
@@ -3979,11 +4032,13 @@ static void update_config()
                else if (!strncasecmp("pap", p, strlen(p)))
                        type = AUTHPAP;
                else
                else if (!strncasecmp("pap", p, strlen(p)))
                        type = AUTHPAP;
                else
-                       LOG(0, 0, 0, "Invalid RADIUS authentication type \"%s\"", p);
+                       LOG(0, 0, 0, "Invalid RADIUS authentication type \"%s\"\n", p);
 
                config->radius_authtypes |= type;
                if (!config->radius_authprefer)
                        config->radius_authprefer = type;
 
                config->radius_authtypes |= type;
                if (!config->radius_authprefer)
                        config->radius_authprefer = type;
+
+               p = s;
        }
 
        if (!config->radius_authtypes)
        }
 
        if (!config->radius_authtypes)
@@ -4115,7 +4170,7 @@ int sessionsetup(tunnelidt t, sessionidt s)
                if (!session[s].ip)
                {
                        LOG(0, s, t, "   No IP allocated.  The IP address pool is FULL!\n");
                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);
+                       sessionshutdown(s, "No IP addresses available.", 2, 7);
                        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",
@@ -4383,6 +4438,7 @@ static int add_plugin(char *plugin_name)
                radiusnew,
                radiussend,
                getconfig,
                radiusnew,
                radiussend,
                getconfig,
+               sessionshutdown,
                sessionkill,
                throttle_session,
                cluster_send_session,
                sessionkill,
                throttle_session,
                cluster_send_session,
for cloning use: "git clone git://git.sameswireless.fr/l2tpns.git" ; For add to your sources.list: "deb http://package.sameswifi.fr/ jessie main"