// L2TP Network Server
// Adrian Kennard 2002
-// (c) Copyrigth 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd)
+// Copyright (c) 2003, 2004 Optus Internet Engineering
+// 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 1.11 2004/07/07 09:09:53 bodea Exp $";
+
#include <arpa/inet.h>
#include <assert.h>
#include <errno.h>
CONFIG("icmp_rate", icmp_rate, INT),
CONFIG("cluster_address", cluster_address, IP),
CONFIG("cluster_interface", cluster_interface, STRING),
+ CONFIG("cluster_hb_interval", cluster_hb_interval, INT),
+ CONFIG("cluster_hb_timeout", cluster_hb_timeout, INT),
#ifdef BGP
CONFIG("as_number", as_number, SHORT),
CONFIG("bgp_peer1", bgp_peer[0], STRING),
if (!mask) mask = 0xffffffff;
- ip = ip & mask; // Force the ip to be the first one in the route.
+ ip &= mask; // Force the ip to be the first one in the route.
memset(&r, 0, sizeof(r));
r.rt_dev = config->tapdevice;
r.rt_flags |= RTF_GATEWAY;
else if (mask == 0xffffffff)
r.rt_flags |= RTF_HOST;
- if (ioctl(ifrfd, add ? SIOCADDRT : SIOCDELRT, (void *) &r) < 0)
- log(0, 0, 0, 0, "routeset() error in ioctl: %s\n", strerror(errno));
log(1, ip, 0, 0, "Route %s %u.%u.%u.%u/%u.%u.%u.%u %u.%u.%u.%u\n",
add ? "add" : "del",
mask >> 24, mask >> 16 & 0xff, mask >> 8 & 0xff, mask & 0xff,
gw >> 24, gw >> 16 & 0xff, gw >> 8 & 0xff, gw & 0xff);
+ if (ioctl(ifrfd, add ? SIOCADDRT : SIOCDELRT, (void *) &r) < 0)
+ log(0, 0, 0, 0, "routeset() error in ioctl: %s\n", strerror(errno));
+
#ifdef BGP
if (add)
bgp_add_route(htonl(ip), htonl(mask));
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);
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
sessionidt sessionbyip(ipt ip)
{
int s = lookup_ipmap(ip);
+ CSTAT(call_sessionbyip);
-#ifdef STAT_CALLS
- STAT(call_sessionbyip);
-#endif
if (s > 0 && s < MAXSESSION && session[s].tunnel)
return s;
return 0;
int i, j, k, l;
int count = 0;
+ if (CLI_HELP_REQUESTED)
+ return CLI_HELP_NO_ARGS;
+
cli_print(cli, "%7s %s", "Sess#", "IP Address");
for (i = 0; i < 256; ++i) {
sessionidt sessionbyuser(char *username)
{
int s;
-#ifdef STAT_CALLS
- STAT(call_sessionbyuser);
-#endif
+ CSTAT(call_sessionbyuser);
+
for (s = 1; s < MAXSESSION ; ++s) {
if (session[s].walled_garden)
continue; // Skip walled garden users.
ipt ip;
sessionidt s;
-#ifdef STAT_CALLS
- STAT(call_processarp);
-#endif
+ CSTAT(call_processarp);
STAT(arp_recv);
+
if (len != 46)
{
log(0, 0, 0, 0, "Unexpected length ARP %d bytes\n", len);
{
struct sockaddr_in addr;
-#ifdef STAT_CALLS
- STAT(call_tunnelsend);
-#endif
+ CSTAT(call_tunnelsend);
+
if (!t)
{
static int backtrace_count = 0;
int size = len;
u8 b[MAXETHER + 20];
-#ifdef STAT_CALLS
- STAT(call_processipout);
-#endif
+
+ CSTAT(call_processipout);
+
if (len < MIN_IP_SIZE)
{
log(1, 0, 0, 0, "Short IP, %d bytes\n", len);
log(5, session[s].ip, s, t, "Ethernet -> Tunnel (%d bytes)\n", len);
- // Snooping this session, send it to ASIO
+ // Snooping this session, send it to intercept box
if (sp->snoop_ip && sp->snoop_port)
snoop_send_packet(buf, len, sp->snoop_ip, sp->snoop_port);
int dead = session[s].die;
int walled_garden = session[s].walled_garden;
-#ifdef STAT_CALLS
- STAT(call_sessionshutdown);
-#endif
+
+ CSTAT(call_sessionshutdown);
+
if (!session[s].tunnel)
{
log(3, session[s].ip, s, session[s].tunnel, "Called sessionshutdown on a session with no tunnel.\n");
u8 buf[MAXCONTROL];
u16 r = session[s].radius;
u8 *q;
-#ifdef STAT_CALLS
- STAT(call_sendipcp);
-#endif
+
+ CSTAT(call_sendipcp);
+
if (!r)
r = radiusnew(s);
+
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)
{
+ radiusclear(r, s); // Clear radius session.
sessionshutdown(s, "No reply on IPCP");
return;
}
// kill a session now
void sessionkill(sessionidt s, char *reason)
{
-#ifdef STAT_CALLS
- STAT(call_sessionkill);
-#endif
+
+ CSTAT(call_sessionkill);
+
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.
{
sessionidt s;
controlt *c;
-#ifdef STAT_CALLS
- STAT(call_tunnelkill);
-#endif
+
+ CSTAT(call_tunnelkill);
tunnel[t].state = TUNNELDIE;
void tunnelshutdown(tunnelidt t, char *reason)
{
sessionidt s;
-#ifdef STAT_CALLS
- STAT(call_tunnelshutdown);
-#endif
+
+ CSTAT(call_tunnelshutdown);
+
if (!tunnel[t].last || !tunnel[t].far || tunnel[t].state == TUNNELFREE)
{
// never set up, can immediately kill
u16 l = len, t = 0, s = 0, ns = 0, nr = 0;
u8 *p = buf + 2;
-#ifdef STAT_CALLS
- STAT(call_processudp);
-#endif
+
+ CSTAT(call_processudp);
+
udp_rx += len;
udp_rx_pkt++;
log_hex(5, "UDP Data", buf, len);
// 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
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;
}
log_hex(5, "Receive TAP Data", buf, len);
STAT(tap_rx_packets);
INC_STAT(tap_rx_bytes, len);
-#ifdef STAT_CALLS
- STAT(call_processtap);
-#endif
+
+ CSTAT(call_processtap);
+
eth_rx_pkt++;
eth_rx += len;
if (len < 22)
continue;
if (radius[r].retry)
{
- if (radius[r].retry <= config->current_time)
+ if (radius[r].retry <= TIME)
radiusretry(r);
} 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 <= config->current_time)
+ if (tunnel[t].die && tunnel[t].die <= TIME)
{
STAT(tunnel_timeout);
tunnelkill(t, "Expired");
if (tunnel[t].retry && tunnel[t].controlc)
{
// resend pending messages as timeout on reply
- if (tunnel[t].retry <= config->current_time)
+ if (tunnel[t].retry <= TIME)
{
controlt *c = tunnel[t].controls;
u8 w = tunnel[t].window;
}
}
// Send hello
- if (tunnel[t].state == TUNNELOPEN && tunnel[t].lastrec < config->current_time + 600)
+ if (tunnel[t].state == TUNNELOPEN && tunnel[t].lastrec < TIME + 600)
{
controlt *c = controlnew(6); // sending HELLO
controladd(c, t, 0); // send the message
}
count = 0;
- for (i = 1; i < config->cluster_highest_sessionid; i++)
+ for (i = 1; i <= config->cluster_highest_sessionid; i++)
{
s++;
- if (s >= config->cluster_highest_sessionid)
+ if (s > config->cluster_highest_sessionid)
s = 1;
if (!session[s].tunnel) // Session isn't in use
}
// check for expired sessions
- if (session[s].die && session[s].die <= config->current_time)
+ if (session[s].die && session[s].die <= TIME)
{
sessionkill(s, "Expired");
if (++count >= MAX_ACTIONS) break;
continue;
}
}
- if (config->accounting_dir && next_acct <= config->current_time)
+ if (config->accounting_dir && next_acct <= TIME)
{
// Dump accounting data
- next_acct = config->current_time + ACCT_TIME;
+ next_acct = TIME + ACCT_TIME;
dump_acct_info();
}
if (!tunnel[i].controlc)
continue;
- if (last_talked != config->current_time) {
- log(2,0,0,0, "Tunnel %d still has an-acked control messages.\n", i);
- last_talked = config->current_time;
+ if (last_talked != TIME) {
+ log(2,0,0,0, "Tunnel %d still has un-acked control messages.\n", i);
+ last_talked = TIME;
}
return 1;
}
if (radius[i].state == RADIUSWAIT)
continue;
- if (last_talked != config->current_time) {
+ if (last_talked != TIME) {
log(2,0,0,0, "Radius session %d is still busy (sid %d)\n", i, radius[i].session);
- last_talked = config->current_time;
+ last_talked = TIME;
}
return 1;
}
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);
n = select(n + 1, &r, 0, 0, &to);
#endif /* BGP */
- config->current_time = now();
+ TIME = now();
if (n < 0)
{
if (errno == EINTR)
}
// 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..
- next_cluster_ping = time_now + 1;
cluster_send_ping(basetime);
-
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.
+ 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..
// Runs on all machines both master and slave.
{
static clockt last_run = 0;
- if (last_run != config->current_time) {
- last_run = config->current_time;
+ if (last_run != TIME) {
+ last_run = TIME;
tbf_run_timer();
}
}
}
// 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.
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)
{
- 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));
if (!*hostname)
{
+ char *p;
// 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);
{
u32 i;
int best = -1;
- clockt best_time = time_now;
+ time_t best_time = time_now;
char *u = session[s].user;
char reuse = 0;
-#ifdef STAT_CALLS
- STAT(call_assign_ip_address);
-#endif
+
+ CSTAT(call_assign_ip_address);
+
for (i = 1; i < ip_pool_size; i++)
{
if (!ip_address_pool[i].address || ip_address_pool[i].assigned)
ip_address_pool[i].session = 0;
ip_address_pool[i].last = time_now;
-#ifdef STAT_CALLS
- STAT(call_free_ip_address);
-#endif
+
+ CSTAT(call_free_ip_address);
+
}
//
if (ipid < 1) // Not found in the pool either? good.
continue;
- log(0, 0, i, 0, "Session %d has an IP address (%s) that was marked static, but is in the pool (%d)!",
+ log(0, 0, i, 0, "Session %d has an IP address (%s) that was marked static, but is in the pool (%d)!\n",
i, inet_toa(session[i].ip), ipid);
// Fall through and process it as part of the pool.
src = inet_addr(buf);
if (src == INADDR_NONE)
{
- log(0, 0, 0, 0, "Invalid address pool IP %s", buf);
+ log(0, 0, 0, 0, "Invalid address pool IP %s\n", buf);
exit(1);
}
// This entry is for a specific IP only
int i;
FILE *f = NULL;
-#ifdef STAT_CALLS
- STAT(call_dump_acct_info);
-#endif
+
+ CSTAT(call_dump_acct_info);
+
strftime(timestr, 64, "%Y%m%d%H%M%S", localtime(&t));
snprintf(filename, 1024, "%s/%s", config->accounting_dir, timestr);
config->debug++;
break;
case 'h':
- strncpy(hostname, optarg, 999);
+ snprintf(hostname, sizeof(hostname), "%s", optarg);
break;
case '?':
default:
initplugins();
initdata();
init_tbf();
- init_cli();
+ init_cli(hostname);
read_config_file();
- log(0, 0, 0, 0, "$Id: l2tpns.c,v 1.8 2004/06/23 03:52:24 fred_nerk Exp $\n"
- "(c) Copyright 2003, 2004 Optus Internet Engineering\n"
- "(c) Copyright 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced\n");
+ log(0, 0, 0, 0, "L2TPNS version " VERSION "\n");
+ log(0, 0, 0, 0, "Copyright (c) 2003, 2004 Optus Internet Engineering\n");
+ log(0, 0, 0, 0, "Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced\n");
{
struct rlimit rlim;
rlim.rlim_cur = RLIM_INFINITY;
void update_config()
{
int i;
+ static int timeout = 0;
+ static int interval = 0;
// Update logging
closelog();
}
memcpy(config->old_plugins, config->plugins, sizeof(config->plugins));
if (!config->cleanup_interval) config->cleanup_interval = 10;
- if (!config->multi_read_count) config->multi_read_count = 1;
+ if (!config->multi_read_count) config->multi_read_count = 10;
if (!config->cluster_address) config->cluster_address = inet_addr(DEFAULT_MCAST_ADDR);
if (!*config->cluster_interface)
strncpy(config->cluster_interface, DEFAULT_MCAST_INTERFACE, sizeof(config->cluster_interface) - 1);
+ if (!config->cluster_hb_interval)
+ config->cluster_hb_interval = PING_INTERVAL; // Heartbeat every 0.5 seconds.
+
+ 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;
}
char *user;
sessionidt i;
int r;
-#ifdef STAT_CALLS
- STAT(call_sessionsetup);
-#endif
+
+ CSTAT(call_sessionsetup);
+
log(3, session[s].ip, s, t, "Doing session setup for session\n");
{
if (session[s].ip) // If there's an old one, remove it.
{
+ // Remove any routes if the IP has changed
+ for (i = 0; i < MAXROUTE && session[s].route[i].ip; i++)
+ {
+ routeset(s, session[s].route[i].ip, session[s].route[i].mask, session[s].ip, 0);
+ session[s].route[i].ip = 0;
+ }
+
if (session[s].ip_pool_index == -1) // static IP
routeset(s, session[s].ip, 0, 0, 0);
- else // It's part of the IP pool, add it manually.
+ else // It's part of the IP pool, remove it manually.
uncache_ipmap(session[s].ip);
}
}
}
- // Add routes for the session if they're new.
+ // Update routed networks
for (i = 0; i < MAXROUTE && (session[s].route[i].ip || new->route[i].ip); i++)
{
if (new->route[i].ip == session[s].route[i].ip &&
continue;
if (session[s].route[i].ip) // Remove the old one if it exists.
- routeset(s, session[s].route[i].ip, session[s].route[i].mask, session[s].route[i].ip, 0);
+ routeset(s, session[s].route[i].ip, session[s].route[i].mask, session[s].ip, 0);
if (new->route[i].ip) // Add the new one if it exists.
routeset(s, new->route[i].ip, new->route[i].mask, new->ip, 1);
}
-
-
if (new->tunnel && s > config->cluster_highest_sessionid) // Maintain this in the slave. It's used
// for walking the sessions to forward byte counts to the master.
config->cluster_highest_sessionid = s;
// Do fixups into address pool.
if (new->ip_pool_index != -1)
fix_address_pool(s);
+
return 1;
}
int l;
struct param_control param = { buf, len, ntohl(addr->sin_addr.s_addr), ntohs(addr->sin_port), NULL, 0, 0 };
- log(4, ntohl(addr->sin_addr.s_addr), 0, 0, "Received ");
- if (log_stream)
+
+ if (log_stream && config->debug >= 4)
+ {
+ log(4, ntohl(addr->sin_addr.s_addr), 0, 0, "Received ");
dump_packet(buf, log_stream);
+ }
resp = calloc(1400, 1);
l = new_packet(PKT_RESP_ERROR, resp);
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;
int count = 0;
int buckets[64];
+ if (CLI_HELP_REQUESTED)
+ return CLI_HELP_NO_ARGS;
+
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 count = 0;
int buckets[64];
+ if (CLI_HELP_REQUESTED)
+ return CLI_HELP_NO_ARGS;
+
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;
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