// 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 1.31 2004-10-25 15:07:51 bodea Exp $";
+char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.41 2004-11-04 06:05:55 bodea Exp $";
#include <arpa/inet.h>
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
+#include <ctype.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/stat.h>
int *radfds = NULL; // RADIUS requests file handles
int ifrfd = -1; // File descriptor for routing, etc
time_t basetime = 0; // base clock
-char *hostname = NULL; // us.
+char hostname[1000] = ""; // us.
int tunidx; // ifr_ifindex of tun device
u32 sessionid = 0; // session id for radius accounting
int syslog_log = 0; // are we logging to syslog
CONFIG("debug", debug, INT),
CONFIG("log_file", log_filename, STRING),
CONFIG("pid_file", pid_file, STRING),
- CONFIG("hostname", hostname, STRING),
CONFIG("l2tp_secret", l2tpsecret, STRING),
CONFIG("primary_dns", default_dns1, IP),
CONFIG("secondary_dns", default_dns2, IP),
CONFIG("save_state", save_state, BOOL),
CONFIG("primary_radius", radiusserver[0], IP),
CONFIG("secondary_radius", radiusserver[1], IP),
- CONFIG("primary_radius_port",radiusport[0], SHORT),
- CONFIG("secondary_radius_port",radiusport[1], SHORT),
+ CONFIG("primary_radius_port", radiusport[0], SHORT),
+ CONFIG("secondary_radius_port", radiusport[1], SHORT),
CONFIG("radius_accounting", radius_accounting, BOOL),
CONFIG("radius_secret", radiussecret, STRING),
CONFIG("bind_address", bind_address, IP),
CONFIG("send_garp", send_garp, BOOL),
CONFIG("throttle_speed", rl_rate, UNSIGNED_LONG),
+ CONFIG("throttle_buckets", num_tbfs, INT),
CONFIG("accounting_dir", accounting_dir, STRING),
CONFIG("setuid", target_uid, INT),
CONFIG("dump_speed", dump_speed, BOOL),
va_end(ap);
}
-void _log_hex(int level, ipt address, sessionidt s, tunnelidt t, const char *title, const char *data, int maxsize)
+void _log_hex(int level, const char *title, const char *data, int maxsize)
{
int i, j;
const u8 *d = (const u8 *)data;
// No support for log_hex to syslog
if (log_stream)
{
- log(level, address, s, t, "%s (%d bytes):\n", title, maxsize);
+ _log(level, 0, 0, 0, "%s (%d bytes):\n", title, maxsize);
setvbuf(log_stream, NULL, _IOFBF, 16384);
for (i = 0; i < maxsize; )
//
// Throttle or Unthrottle a session
//
-// Throttle the data folling through a session
-// to be no more than 'throttle' kbit/sec each way.
+// Throttle the data from/to through a session to no more than
+// 'rate_in' kbit/sec in (from user) or 'rate_out' kbit/sec out (to
+// user).
//
-int throttle_session(sessionidt s, int throttle)
+// If either value is -1, the current value is retained for that
+// direction.
+//
+void throttle_session(sessionidt s, int rate_in, int rate_out)
{
if (!session[s].tunnel)
- return 0; // No-one home.
+ return; // No-one home.
if (!*session[s].user)
- return 0; // User not logged in
+ return; // User not logged in
- if (throttle)
+ if (rate_in >= 0)
{
- int rate_in = throttle & 0x0000FFFF;
- int rate_out = throttle >> 16;
-
- if (session[s].tbf_in || session[s].tbf_out)
- {
- if (throttle == session[s].throttle)
- return 1;
-
- // Currently throttled but the rate is changing.
-
+ int bytes = rate_in * 1024 / 8; // kbits to bytes
+ if (session[s].tbf_in)
free_tbf(session[s].tbf_in);
- free_tbf(session[s].tbf_out);
- }
-
- if (rate_in) session[s].tbf_in = new_tbf(s, rate_in * 1024 / 4, rate_in * 1024 / 8, send_ipin);
- if (rate_out) session[s].tbf_out = new_tbf(s, rate_out * 1024 / 4, rate_out * 1024 / 8, send_ipout);
- if (throttle != session[s].throttle)
- {
- // Changed. Flood to slaves.
- session[s].throttle = throttle;
- cluster_send_session(s);
- }
+ if (rate_in > 0)
+ session[s].tbf_in = new_tbf(s, bytes * 2, bytes, send_ipin);
+ else
+ session[s].tbf_in = 0;
- return 1;
+ session[s].throttle_in = rate_in;
}
- // else Unthrottling.
-
- if (!session[s].tbf_in && !session[s].tbf_out && !session[s].throttle)
- return 0;
-
- free_tbf(session[s].tbf_in);
- session[s].tbf_in = 0;
+ if (rate_out >= 0)
+ {
+ int bytes = rate_out * 1024 / 8;
+ if (session[s].tbf_out)
+ free_tbf(session[s].tbf_out);
- free_tbf(session[s].tbf_out);
- session[s].tbf_out = 0;
+ if (rate_out > 0)
+ session[s].tbf_out = new_tbf(s, bytes * 2, bytes, send_ipout);
+ else
+ session[s].tbf_out = 0;
- if (throttle != session[s].throttle)
- {
- // Changed. Flood to slaves.
- session[s].throttle = throttle;
- cluster_send_session(s);
+ session[s].throttle_out = rate_out;
}
-
- return 0;
}
// start tidy shutdown of session
}
else
free_ip_address(s);
-
- if (session[s].throttle) // Unthrottle if throttled.
- throttle_session(s, 0);
}
+
+ if (session[s].throttle_in || session[s].throttle_out) // Unthrottle if throttled.
+ throttle_session(s, 0, 0);
+
{ // Send CDN
controlt *c = controlnew(14); // sending CDN
control16(c, 1, 3, 1); // result code (admin reasons - TBA make error, general error, add message
control16(c, 14, s, 1); // assigned session (our end)
controladd(c, session[s].tunnel, s); // send the message
}
+
cluster_send_session(s);
}
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.
-
memset(&session[s], 0, sizeof(session[s]));
session[s].tunnel = T_FREE; // Mark it as free.
session[s].next = sessionfree;
case 13: // Response
// Why did they send a response? We never challenge.
log(2, ntohl(addr->sin_addr.s_addr), s, t, " received unexpected challenge response\n");
- break;
+ break;
case 14: // assigned session
asession = session[s].far = ntohs(*(u16 *) (b));
}
else if (prot == PPPIP)
{
- if (!config->cluster_iam_master)
+ session[s].last_packet = time_now;
+ if (session[s].walled_garden && !config->cluster_iam_master)
{
- // We're a slave. Should we forward this packet to the master?
-
- // Is this a walled garden session, or something that needs it's
- // idle time updated??
-
- // Maintain the idle timeouts on the master. If this would
- // significantly reset the idletimeout, run it via the master
- // to refresh the master's idle timer.
- // Not sure this is ideal: It may re-order packets.
-
- if (session[s].walled_garden || (session[s].last_packet + (ECHO_TIMEOUT/2)) < time_now)
- {
- master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port);
- session[s].last_packet = time_now;
- return;
- }
- // fall through to processipin.
- } else
- session[s].last_packet = time_now;
+ master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port);
+ return;
+ }
processipin(t, s, p, l);
}
else
a = 0; // dead, no need to check for other actions
}
- if (a & CLI_SESS_SNOOP)
+ if (a & CLI_SESS_NOSNOOP)
+ {
+ log(2, 0, s, session[s].tunnel, "Unsnooping session by CLI\n");
+ session[s].snoop_ip = 0;
+ session[s].snoop_port = 0;
+ send++;
+ }
+ else if (a & CLI_SESS_SNOOP)
{
log(2, 0, s, session[s].tunnel, "Snooping session by CLI (to %s:%d)\n",
inet_toa(cli_session_actions[s].snoop_ip), cli_session_actions[s].snoop_port);
send++;
}
- if (a & CLI_SESS_NOSNOOP)
+ if (a & CLI_SESS_NOTHROTTLE)
{
- log(2, 0, s, session[s].tunnel, "Unsnooping session by CLI\n");
- session[s].snoop_ip = 0;
- session[s].snoop_port = 0;
+ log(2, 0, s, session[s].tunnel, "Un-throttling session by CLI\n");
+ throttle_session(s, 0, 0);
send++;
}
-
- if (a & CLI_SESS_THROTTLE)
+ else if (a & CLI_SESS_THROTTLE)
{
log(2, 0, s, session[s].tunnel, "Throttling session by CLI (to %dkb/s up and %dkb/s down)\n",
- cli_session_actions[s].throttle & 0xFFFF,
- cli_session_actions[s].throttle >> 16);
-
- throttle_session(s, cli_session_actions[s].throttle);
- }
+ cli_session_actions[s].throttle_in,
+ cli_session_actions[s].throttle_out);
- if (a & CLI_SESS_NOTHROTTLE)
- {
- log(2, 0, s, session[s].tunnel, "Un-throttling session by CLI\n");
- throttle_session(s, 0);
+ throttle_session(s, cli_session_actions[s].throttle_in, cli_session_actions[s].throttle_out);
+ send++;
}
if (send)
if (++count >= MAX_ACTIONS) break;
}
}
+
if (*config->accounting_dir && next_acct <= TIME)
{
// Dump accounting data
return 1;
}
- // We stop waiting for radius after BUSY_WAIT_TIMEOUT 1/10th seconds
- if (abs(TIME - start_busy_wait) > BUSY_WAIT_TIMEOUT)
+ // We stop waiting for radius after BUSY_WAIT_TIME 1/10th seconds
+ if (abs(TIME - start_busy_wait) > BUSY_WAIT_TIME)
{
log(1, 0, 0, 0, "Giving up waiting for RADIUS to be empty. Shutting down anyway.\n");
return 0;
return 0;
}
+static fd_set readset;
+static int readset_n = 0;
+
// main loop - gets packets on tun or udp and processes them
void mainloop(void)
{
- fd_set cr;
- int cn, i;
+ int i;
u8 buf[65536];
struct timeval to;
clockt next_cluster_ping = 0; // send initial ping immediately
log(4, 0, 0, 0, "Beginning of main loop. udpfd=%d, tunfd=%d, cluster_sockfd=%d, controlfd=%d\n",
udpfd, tunfd, cluster_sockfd, controlfd);
- FD_ZERO(&cr);
- FD_SET(udpfd, &cr);
- FD_SET(tunfd, &cr);
- FD_SET(controlfd, &cr);
- FD_SET(clifd, &cr);
- if (cluster_sockfd) FD_SET(cluster_sockfd, &cr);
- cn = udpfd;
- if (cn < tunfd) cn = tunfd;
- if (cn < controlfd) cn = controlfd;
- if (cn < clifd) cn = clifd;
- if (cn < cluster_sockfd) cn = cluster_sockfd;
- for (i = 0; i < config->num_radfds; i++)
- {
- if (!radfds[i]) continue;
- FD_SET(radfds[i], &cr);
- if (radfds[i] > cn)
- cn = radfds[i];
- }
+ FD_ZERO(&readset);
+ FD_SET(udpfd, &readset);
+ FD_SET(tunfd, &readset);
+ FD_SET(controlfd, &readset);
+ FD_SET(clifd, &readset);
+ if (cluster_sockfd) FD_SET(cluster_sockfd, &readset);
+ readset_n = udpfd;
+ if (tunfd > readset_n) readset_n = tunfd;
+ if (controlfd > readset_n) readset_n = controlfd;
+ if (clifd > readset_n) readset_n = clifd;
+ if (cluster_sockfd > readset_n) readset_n = cluster_sockfd;
while (!main_quit || still_busy())
{
fd_set r;
- int n = cn;
+ int n = readset_n;
#ifdef BGP
fd_set w;
int bgp_set[BGP_NUM_PEERS];
update_config();
}
- memcpy(&r, &cr, sizeof(fd_set));
+ memcpy(&r, &readset, sizeof(fd_set));
to.tv_sec = 0;
to.tv_usec = 100000; // 1/10th of a second.
TIME = now();
if (n < 0)
{
- if (errno == EINTR)
+ if (errno == EINTR ||
+ errno == ECHILD) // EINTR was clobbered by sigchild_handler()
continue;
log(0, 0, 0, 0, "Error returned from select(): %s\n", strerror(errno));
break;
}
}
- for (i = 0; i < config->num_radfds; i++)
- if (FD_ISSET(radfds[i], &r))
- processrad(buf, recv(radfds[i], buf, sizeof(buf), 0), i);
+
+ if (config->cluster_iam_master)
+ for (i = 0; i < config->num_radfds; i++)
+ if (FD_ISSET(radfds[i], &r))
+ processrad(buf, recv(radfds[i], buf, sizeof(buf), 0), i);
+
if (FD_ISSET(cluster_sockfd, &r))
{
int size;
size = recvfrom(cluster_sockfd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen);
processcluster(buf, size, addr.sin_addr.s_addr);
}
+
if (FD_ISSET(controlfd, &r))
processcontrol(buf, recvfrom(controlfd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen), &addr);
+
if (FD_ISSET(clifd, &r))
{
struct sockaddr_in addr;
// Important!!! We MUST not process any packets past this point!
}
+static void stripdomain(char *host)
+{
+ char *p;
+
+ if ((p = strchr(host, '.')))
+ {
+ char *domain = 0;
+ char _domain[1024];
+
+ // strip off domain
+ FILE *resolv = fopen("/etc/resolv.conf", "r");
+ if (resolv)
+ {
+ char buf[1024];
+ char *b;
+
+ while (fgets(buf, sizeof(buf), resolv))
+ {
+ if (strncmp(buf, "domain", 6) && strncmp(buf, "search", 6))
+ continue;
+
+ if (!isspace(buf[6]))
+ continue;
+
+ b = buf + 7;
+ while (isspace(*b)) b++;
+
+ if (*b)
+ {
+ char *d = b;
+ while (*b && !isspace(*b)) b++;
+ *b = 0;
+ if (buf[0] == 'd') // domain is canonical
+ {
+ domain = d;
+ break;
+ }
+
+ // first search line
+ if (!domain)
+ {
+ // hold, may be subsequent domain line
+ strncpy(_domain, d, sizeof(_domain))[sizeof(_domain)-1] = 0;
+ domain = _domain;
+ }
+ }
+ }
+
+ fclose(resolv);
+ }
+
+ if (domain)
+ {
+ int hl = strlen(host);
+ int dl = strlen(domain);
+ if (dl < hl && host[hl - dl - 1] == '.' && !strcmp(host + hl - dl, domain))
+ host[hl -dl - 1] = 0;
+ }
+ else
+ {
+ *p = 0; // everything after first dot
+ }
+ }
+}
+
// Init data structures
void initdata(int optdebug, char *optconfig)
{
int i;
- char *p;
if (!(_statistics = shared_malloc(sizeof(struct Tstats))))
{
}
memset(config, 0, sizeof(struct configt));
time(&config->start_time);
- config->debug = optdebug;
strncpy(config->config_file, optconfig, strlen(optconfig));
+ config->debug = optdebug;
+ config->num_tbfs = MAXTBFS;
+ config->rl_rate = 28; // 28kbps
+
if (!(tunnel = shared_malloc(sizeof(tunnelt) * MAXTUNNEL)))
{
log(0, 0, 0, 0, "Error doing malloc for tunnels: %s\n", strerror(errno));
for (i = 1; i < MAXTUNNEL- 1; i++)
tunnel[i].state = TUNNELUNDEF; // mark it as not filled in.
- // Grab my hostname unless it's been specified
- gethostname(config->hostname, sizeof(config->hostname));
- if ((p = strchr(config->hostname, '.'))) *p = 0;
- hostname = config->hostname;
+ if (!*hostname)
+ {
+ // Grab my hostname unless it's been specified
+ gethostname(hostname, sizeof(hostname));
+ stripdomain(hostname);
+ }
_statistics->start_time = _statistics->last_reset = time(NULL);
for (i = 0; i < MAXSESSION; i++)
{
- if (!session[i].opened || !session[i].ip || (!session[i].cin && !session[i].cout) || !*session[i].user || session[i].walled_garden)
+ if (!session[i].opened || !session[i].ip || !(session[i].cin || session[i].cout) || !*session[i].user || session[i].walled_garden)
continue;
if (!f)
{
log(4, 0, 0, 0, "Dumping accounting information for %s\n", session[i].user);
fprintf(f, "%s %s %d %u %u\n",
- session[i].user, // username
- inet_toa(htonl(session[i].ip)), // ip
- (session[i].throttle) ? 2 : 1, // qos
- (u32)session[i].cin, // uptxoctets
- (u32)session[i].cout); // downrxoctets
+ session[i].user, // username
+ inet_toa(htonl(session[i].ip)), // ip
+ (session[i].throttle_in || session[i].throttle_out) ? 2 : 1, // qos
+ (u32)session[i].cin, // uptxoctets
+ (u32)session[i].cout); // downrxoctets
session[i].pin = session[i].cin = 0;
session[i].pout = session[i].cout = 0;
initplugins();
initdata(optdebug, optconfig);
- init_tbf();
- init_cli();
+ init_cli(hostname);
read_config_file();
+ init_tbf(config->num_tbfs);
log(0, 0, 0, 0, "L2TPNS version " VERSION "\n");
log(0, 0, 0, 0, "Copyright (c) 2003, 2004 Optus Internet Engineering\n");
if (!session[s].ip || session[s].ip == 0xFFFFFFFE)
{
assign_ip_address(s);
- if (session[s].ip)
- log(3, 0, s, t, " No IP allocated. Assigned %s from pool\n",
- inet_toa(htonl(session[s].ip)));
- else
+ if (!session[s].ip)
{
log(0, 0, s, t, " No IP allocated. The IP address pool is FULL!\n");
sessionshutdown(s, "No IP addresses available");
return 0;
}
+ log(3, 0, s, t, " No IP allocated. Assigned %s from pool\n",
+ inet_toa(htonl(session[s].ip)));
}
run_plugins(PLUGIN_NEW_SESSION, &data);
}
- // Force throttling on or off (Actually : refresh the current throttling status)
- // This has the advantage of cleaning up after another throttled user who may have left
- // firewall rules lying around
- throttle_session(s, session[s].throttle);
+ // Allocate TBFs if throttled
+ if (session[s].throttle_in || session[s].throttle_out)
+ throttle_session(s, session[s].throttle_in, session[s].throttle_out);
session[s].last_packet = time_now;
// for walking the sessions to forward byte counts to the master.
config->cluster_highest_sessionid = s;
+ // TEMP: old session struct used a u32 to define the throttle
+ // speed for both up/down, new uses a u16 for each. Deal with
+ // sessions from an old master for migration.
+ if (new->throttle_out == 0 && new->tbf_out)
+ new->throttle_out = new->throttle_in;
+
memcpy(&session[s], new, sizeof(session[s])); // Copy over..
// Do fixups into address pool.
//
void become_master(void)
{
- int s;
+ int s, i;
run_plugins(PLUGIN_BECOME_MASTER, NULL);
- for (s = 1; s <= config->cluster_highest_sessionid ; ++s)
+ // running a bunch of iptables commands is slow and can cause
+ // the master to drop tunnels on takeover--kludge around the
+ // problem by forking for the moment (note: race)
+ if (!fork_and_close())
{
- if (!session[s].tunnel) // Not an in-use session.
- continue;
+ for (s = 1; s <= config->cluster_highest_sessionid ; ++s)
+ {
+ if (!session[s].tunnel) // Not an in-use session.
+ continue;
- run_plugins(PLUGIN_NEW_SESSION_MASTER, &session[s]);
+ run_plugins(PLUGIN_NEW_SESSION_MASTER, &session[s]);
+ }
+ exit(0);
}
-}
-
+ // add radius fds
+ for (i = 0; i < config->num_radfds; i++)
+ {
+ if (!radfds[i]) continue;
+ FD_SET(radfds[i], &readset);
+ if (radfds[i] > readset_n)
+ readset_n = radfds[i];
+ }
+}
int cmd_show_hist_idle(struct cli_def *cli, char *command, char **argv, int argc)
{
projects / l2tpns.git / blobdiff