doc updates from mo

[l2tpns.git] / l2tpns.c

diff --git a/l2tpns.c b/l2tpns.c
index 7bd7d18..5133807 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 1.10 2004-07-02 07:31:23 bodea Exp $";
+char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.11 2004-07-07 09:09:53 bodea Exp $";

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


@@ -418,7 +418,7 @@ void initudp(void)
        addr.sin_family = AF_INET;
        addr.sin_port = htons(L2TPPORT);
        addr.sin_addr.s_addr = config->bind_address;
        addr.sin_family = AF_INET;
        addr.sin_port = htons(L2TPPORT);
        addr.sin_addr.s_addr = config->bind_address;

-       udpfd = socket(AF_INET, SOCK_DGRAM, UDP);
+       udpfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);

        setsockopt(udpfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
        {
                int flags = fcntl(udpfd, F_GETFL, 0);
        setsockopt(udpfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
        {
                int flags = fcntl(udpfd, F_GETFL, 0);


@@ -429,7 +429,7 @@ void initudp(void)
                log(0, 0, 0, 0, "Error in UDP bind: %s\n", strerror(errno));
                exit(1);
        }
                log(0, 0, 0, 0, "Error in UDP bind: %s\n", strerror(errno));
                exit(1);
        }

-       snoopfd = socket(AF_INET, SOCK_DGRAM, UDP);
+       snoopfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);

        snoop_addr.sin_family = AF_INET;
 
        // Control
        snoop_addr.sin_family = AF_INET;
 
        // Control


@@ -1161,14 +1161,17 @@ void sendipcp(tunnelidt t, sessionidt s)
 
        if (!r)
                r = radiusnew(s);
 
        if (!r)
                r = radiusnew(s);

+

        if (radius[r].state != RADIUSIPCP)
        {
                radius[r].state = RADIUSIPCP;
                radius[r].try = 0;
        }
        if (radius[r].state != RADIUSIPCP)
        {
                radius[r].state = RADIUSIPCP;
                radius[r].try = 0;
        }

+

        radius[r].retry = backoff(radius[r].try++);
        if (radius[r].try > 10)
        {
        radius[r].retry = backoff(radius[r].try++);
        if (radius[r].try > 10)
        {

+               radiusclear(r, s);      // Clear radius session.

                sessionshutdown(s, "No reply on IPCP");
                return;
        }
                sessionshutdown(s, "No reply on IPCP");
                return;
        }


@@ -1198,6 +1201,7 @@ void sessionkill(sessionidt s, char *reason)
        sessionshutdown(s, reason);  // close radius/routes, etc.
        if (session[s].radius)
                radiusclear(session[s].radius, 0); // cant send clean accounting data, session is killed
        sessionshutdown(s, reason);  // close radius/routes, etc.
        if (session[s].radius)
                radiusclear(session[s].radius, 0); // cant send clean accounting data, session is killed

+

        log(2, 0, s, session[s].tunnel, "Kill session %d (%s): %s\n", s, session[s].user, reason);
 
        throttle_session(s, 0);         // Force session to be un-throttle. Free'ing TBF structures.
        log(2, 0, s, session[s].tunnel, "Kill session %d (%s): %s\n", s, session[s].user, reason);
 
        throttle_session(s, 0);         // Force session to be un-throttle. Free'ing TBF structures.


@@ -1585,8 +1589,8 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
                                        // TBA - to send to RADIUS
                                        break;
                                case 8:     // vendor name
                                        // TBA - to send to RADIUS
                                        break;
                                case 8:     // vendor name

-                                       memset(tunnel[t].vendor, 0, 128);
-                                       memcpy(tunnel[t].vendor, b, (n >= 127) ? 127 : n);
+                                       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);

                                        log(4, ntohl(addr->sin_addr.s_addr), s, t, "   Vendor name = \"%s\"\n", tunnel[t].vendor);
                                        break;
                                case 9:     // assigned tunnel
                                        log(4, ntohl(addr->sin_addr.s_addr), s, t, "   Vendor name = \"%s\"\n", tunnel[t].vendor);
                                        break;
                                case 9:     // assigned tunnel


@@ -1819,7 +1823,7 @@ void processudp(u8 * buf, int len, struct sockaddr_in *addr)
                                                if (!(r = radiusnew(s)))
                                                {
                                                        log(1, ntohl(addr->sin_addr.s_addr), s, t, "No free RADIUS sessions for ICRQ\n");
                                                if (!(r = radiusnew(s)))
                                                {
                                                        log(1, ntohl(addr->sin_addr.s_addr), s, t, "No free RADIUS sessions for ICRQ\n");

-//                                                     sessionkill(s, "no free RADIUS sesions");
+                                                       sessionkill(s, "no free RADIUS sesions");

                                                        return;
                                                }
 
                                                        return;
                                                }
 


@@ -2044,7 +2048,7 @@ int regular_cleanups(void)
                } else
                        radius[r].retry = backoff(radius[r].try+1);     // Is this really needed? --mo
        }
                } else
                        radius[r].retry = backoff(radius[r].try+1);     // Is this really needed? --mo
        }

-       for (t = 1; t < config->cluster_highest_tunnelid; t++)
+       for (t = 1; t <= config->cluster_highest_tunnelid; t++)

        {
                // check for expired tunnels
                if (tunnel[t].die && tunnel[t].die <= TIME)
        {
                // check for expired tunnels
                if (tunnel[t].die && tunnel[t].die <= TIME)


@@ -2220,8 +2224,8 @@ void mainloop(void)
        int cn, i;
        u8 buf[65536];
        struct timeval to;
        int cn, i;
        u8 buf[65536];
        struct timeval to;

-       time_t next_cluster_ping = 0;   // default 1 second pings.
-       clockt next_clean = time_now + config->cleanup_interval;
+       clockt next_cluster_ping = 0;   // send initial ping immediately
+       time_t next_clean = time_now + config->cleanup_interval;

 
        log(4, 0, 0, 0, "Beginning of main loop. udpfd=%d, tapfd=%d, cluster_sockfd=%d, controlfd=%d\n",
                        udpfd, tapfd, cluster_sockfd, controlfd);
 
        log(4, 0, 0, 0, "Beginning of main loop. udpfd=%d, tapfd=%d, cluster_sockfd=%d, controlfd=%d\n",
                        udpfd, tapfd, cluster_sockfd, controlfd);


@@ -2355,16 +2359,17 @@ void mainloop(void)
                }
 
                        // Runs on every machine (master and slaves).
                }
 
                        // Runs on every machine (master and slaves).

-               if (cluster_sockfd && next_cluster_ping <= time_now)
+               if (cluster_sockfd && next_cluster_ping <= TIME)

                {
                        // Check to see which of the cluster is still alive..
                {
                        // Check to see which of the cluster is still alive..

-                       next_cluster_ping = time_now + 1;

                        cluster_send_ping(basetime);
                        cluster_send_ping(basetime);

-

                        cluster_check_master();
                        cluster_check_master();

-
-                       cluster_heartbeat(config->cluster_highest_sessionid, sessionfree, config->cluster_highest_tunnelid);    // Only does anything if we're a master.
+                       cluster_heartbeat();            // Only does anything if we're a master.

                        master_update_counts();         // If we're a slave, send our byte counters to our master.
                        master_update_counts();         // If we're a slave, send our byte counters to our master.

+                       if (config->cluster_iam_master && !config->cluster_iam_uptodate)
+                               next_cluster_ping = TIME + 1; // out-of-date slaves, do fast updates
+                       else
+                               next_cluster_ping = TIME + config->cluster_hb_interval;

                }
 
                        // Run token bucket filtering queue..
                }
 
                        // Run token bucket filtering queue..


@@ -2401,11 +2406,8 @@ void mainloop(void)
        }
 
                // Are we the master and shutting down??
        }
 
                // Are we the master and shutting down??

-       if (config->cluster_iam_master) {
-
-               cluster_heartbeat(config->cluster_highest_sessionid, sessionfree,
-                       config->cluster_highest_tunnelid);      // Flush any queued changes..
-       }
+       if (config->cluster_iam_master)
+               cluster_heartbeat(); // Flush any queued changes..

 
                // Ok. Notify everyone we're shutting down. If we're
                // the master, this will force an election.
 
                // Ok. Notify everyone we're shutting down. If we're
                // the master, this will force an election.


@@ -2464,14 +2466,14 @@ void initdata(void)
        ip_address_pool = mmap(NULL, sizeof(ippoolt) * MAXIPPOOL, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0);
        if (ip_address_pool == MAP_FAILED)
        {
        ip_address_pool = mmap(NULL, sizeof(ippoolt) * MAXIPPOOL, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0);
        if (ip_address_pool == MAP_FAILED)
        {

-               log(0, 0, 0, 0, "Error doing mmap for radius: %s\n", strerror(errno));
+               log(0, 0, 0, 0, "Error doing mmap for ip_address_pool: %s\n", strerror(errno));

                exit(1);
        }
 #ifdef RINGBUFFER
        ringbuffer = mmap(NULL, sizeof(struct Tringbuffer), PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0);
        if (ringbuffer == MAP_FAILED)
        {
                exit(1);
        }
 #ifdef RINGBUFFER
        ringbuffer = mmap(NULL, sizeof(struct Tringbuffer), PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0);
        if (ringbuffer == MAP_FAILED)
        {

-               log(0, 0, 0, 0, "Error doing mmap for radius: %s\n", strerror(errno));
+               log(0, 0, 0, 0, "Error doing mmap for ringbuffer: %s\n", strerror(errno));

                exit(1);
        }
        memset(ringbuffer, 0, sizeof(struct Tringbuffer));
                exit(1);
        }
        memset(ringbuffer, 0, sizeof(struct Tringbuffer));


@@ -2512,8 +2514,10 @@ void initdata(void)
 
        if (!*hostname)
        {
 
        if (!*hostname)
        {

+               char *p;

                // Grab my hostname unless it's been specified
                gethostname(hostname, sizeof(hostname));
                // Grab my hostname unless it's been specified
                gethostname(hostname, sizeof(hostname));

+               if ((p = strchr(hostname, '.'))) *p = 0;

        }
        _statistics->start_time = _statistics->last_reset = time(NULL);
 
        }
        _statistics->start_time = _statistics->last_reset = time(NULL);
 


@@ -2539,7 +2543,7 @@ int assign_ip_address(sessionidt s)
 {
        u32 i;
        int best = -1;
 {
        u32 i;
        int best = -1;

-       clockt best_time = time_now;
+       time_t best_time = time_now;

        char *u = session[s].user;
        char reuse = 0;
 
        char *u = session[s].user;
        char reuse = 0;
 


@@ -2881,7 +2885,7 @@ int main(int argc, char *argv[])
                                config->debug++;
                                break;
                        case 'h':
                                config->debug++;
                                break;
                        case 'h':

-                               strncpy(hostname, optarg, 999);
+                               snprintf(hostname, sizeof(hostname), "%s", optarg);

                                break;
                        case '?':
                        default:
                                break;
                        case '?':
                        default:


@@ -2907,7 +2911,7 @@ int main(int argc, char *argv[])
        initplugins();
        initdata();
        init_tbf();
        initplugins();
        initdata();
        init_tbf();

-       init_cli();
+       init_cli(hostname);

        read_config_file();
 
        log(0, 0, 0, 0, "L2TPNS version " VERSION "\n");
        read_config_file();
 
        log(0, 0, 0, 0, "L2TPNS version " VERSION "\n");


@@ -3291,6 +3295,8 @@ static int facility_value(char *name)
 void update_config()
 {
        int i;
 void update_config()
 {
        int i;

+       static int timeout = 0;
+       static int interval = 0;

 
        // Update logging
        closelog();
 
        // Update logging
        closelog();


@@ -3373,6 +3379,26 @@ void update_config()
        if (!config->cluster_hb_timeout)
                config->cluster_hb_timeout = HB_TIMEOUT;        // 10 missed heartbeat triggers an election.
 
        if (!config->cluster_hb_timeout)
                config->cluster_hb_timeout = HB_TIMEOUT;        // 10 missed heartbeat triggers an election.
 

+       if (interval != config->cluster_hb_interval || timeout != config->cluster_hb_timeout)
+       {
+               // Paranoia:  cluster_check_master() treats 2 x interval + 1 sec as
+               // late, ensure we're sufficiently larger than that
+               int t = 4 * config->cluster_hb_interval + 11;
+
+               if (config->cluster_hb_timeout < t)
+               {
+                       log(0,0,0,0, "Heartbeat timeout %d too low, adjusting to %d\n", config->cluster_hb_timeout, t);
+                       config->cluster_hb_timeout = t;
+               }
+
+               // Push timing changes to the slaves immediately if we're the master
+               if (config->cluster_iam_master)
+                       cluster_heartbeat();
+
+               interval = config->cluster_hb_interval;
+               timeout = config->cluster_hb_timeout;
+       }
+

        config->reload_config = 0;
 }
 
        config->reload_config = 0;
 }
 


@@ -3807,7 +3833,7 @@ void become_master(void)
        int s;
        run_plugins(PLUGIN_BECOME_MASTER, NULL);
 
        int s;
        run_plugins(PLUGIN_BECOME_MASTER, NULL);
 

-       for (s = 0; s < config->cluster_highest_sessionid ; ++s) {
+       for (s = 1; s <= config->cluster_highest_sessionid ; ++s) {

                if (!session[s].tunnel) // Not an in-use session.
                        continue;
 
                if (!session[s].tunnel) // Not an in-use session.
                        continue;
 


@@ -3829,7 +3855,7 @@ int cmd_show_hist_idle(struct cli_def *cli, char *command, char **argv, int argc
        time(&time_now);
        for (i = 0; i < 64;++i) buckets[i] = 0;
 
        time(&time_now);
        for (i = 0; i < 64;++i) buckets[i] = 0;
 

-       for (s = 0; s < config->cluster_highest_sessionid ; ++s) {
+       for (s = 1; s <= config->cluster_highest_sessionid ; ++s) {

                int idle;
                if (!session[s].tunnel)
                        continue;
                int idle;
                if (!session[s].tunnel)
                        continue;


@@ -3865,7 +3891,7 @@ int cmd_show_hist_open(struct cli_def *cli, char *command, char **argv, int argc
        time(&time_now);
        for (i = 0; i < 64;++i) buckets[i] = 0;
 
        time(&time_now);
        for (i = 0; i < 64;++i) buckets[i] = 0;
 

-       for (s = 0; s < config->cluster_highest_sessionid ; ++s) {
+       for (s = 1; s <= config->cluster_highest_sessionid ; ++s) {

                int open = 0, d;
                if (!session[s].tunnel)
                        continue;
                int open = 0, d;
                if (!session[s].tunnel)
                        continue;