#include <errno.h>
#include <fcntl.h>
#include <linux/if_tun.h>
+#define SYSLOG_NAMES
+#include <syslog.h>
#include <malloc.h>
#include <math.h>
#include <net/route.h>
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
+#define __USE_GNU
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <linux/if.h>
+#include <stddef.h>
#include <time.h>
#include <dlfcn.h>
#include <unistd.h>
-#ifdef HAVE_LIBCLI
-#include <libcli.h>
-#endif
#include "md5.h"
#include "l2tpns.h"
#include "cluster.h"
#include "control.h"
#include "util.h"
-ipt radiusserver[MAXRADSERVER]; // radius servers
-u8 numradiusservers = 0; // how many radius servers
-
// Globals
-char tapdevice[10] = ""; // tap device name
-int tapfd = -1; // tap interface file handle
-int udpfd = -1; // UDP file handle
-int controlfd = -1; // Control signal handle
-int snoopfd = -1; // UDP file handle for sending out intercept data
-int radfd = -1; // RADIUS requests file handle
-int ifrfd = -1; // File descriptor for routing, etc
-char debug = 0; // debug leveL
-time_t basetime = 0; // base clock
-char hostname[1000] = ""; // us.
-ipt myip = 0; // MY IP
-u16 tapmac[3]; // MAC of tap interface
-int tapidx; // ifr_ifindex of tap device
-char *radiussecret = 0; // RADIUS secret
-char *l2tpsecret = 0; // L2TP secret
-u32 sessionid = 0; // session id for radius accounting
-char *snoop_destination_host = NULL;
-u16 snoop_destination_port = 0;
-char *log_filename = NULL;
-char *config_file = CONFIGFILE;
+struct configt *config = NULL; // all configuration
+int tapfd = -1; // tap interface file handle
+int udpfd = -1; // UDP file handle
+int controlfd = -1; // Control signal handle
+int snoopfd = -1; // UDP file handle for sending out intercept data
+int radfd = -1; // RADIUS requests file handle
+int ifrfd = -1; // File descriptor for routing, etc
+time_t basetime = 0; // base clock
+char hostname[1000] = ""; // us.
+ipt myip = 0; // MY IP
+u16 tapmac[3]; // MAC of tap interface
+int tapidx; // ifr_ifindex of tap device
+u32 sessionid = 0; // session id for radius accounting
+int syslog_log = 0; // are we logging to syslog
FILE *log_stream = NULL;
-unsigned long default_dns1 = 0, default_dns2 = 0;
struct sockaddr_in snoop_addr = {0};
-extern unsigned long rl_rate;
extern int cluster_sockfd;
unsigned long last_sid = 0;
-int config_save_state = 0;
-int radius_accounting = 0;
-char *accounting_dir = NULL;
-uint32_t cluster_address = 0;
-uint32_t bind_address = INADDR_ANY;
int handle_interface = 0;
-#ifdef HAVE_LIBCLI
-pid_t cli_pid = 0;
int clifd = 0;
sessionidt *cli_session_kill = NULL;
tunnelidt *cli_tunnel_kill = NULL;
-#endif
static void *ip_hash[256];
unsigned long udp_tx = 0, udp_rx = 0, udp_rx_pkt = 0;
unsigned long eth_tx = 0, eth_rx = 0, eth_rx_pkt = 0;
-unsigned int ip_pool_index = 0;
unsigned int ip_pool_size = 0;
time_t time_now;
char time_now_string[64] = {0};
char main_quit = 0;
-int dump_speed = 0;
-int target_uid = 500;
char *_program_name = NULL;
linked_list *loaded_plugins;
linked_list *plugins[MAX_PLUGIN_TYPES];
+#define membersize(STRUCT, MEMBER) sizeof(((STRUCT *)0)->MEMBER)
+#define CONFIG(NAME, MEMBER, TYPE) { NAME, offsetof(struct configt, MEMBER), membersize(struct configt, MEMBER), TYPE }
+
+struct config_descriptt config_values[] = {
+ CONFIG("debug", debug, INT),
+ CONFIG("log_file", log_filename, 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("snoop_host", snoop_destination_host, IP),
+ CONFIG("snoop_port", snoop_destination_port, SHORT),
+ CONFIG("primary_radius", radiusserver[0], IP),
+ CONFIG("secondary_radius", radiusserver[1], IP),
+ CONFIG("radius_accounting", radius_accounting, BOOL),
+ CONFIG("radius_secret", radiussecret, STRING),
+ CONFIG("bind_address", bind_address, IP),
+ CONFIG("cluster_master", cluster_address, IP),
+ CONFIG("throttle_speed", rl_rate, UNSIGNED_LONG),
+ CONFIG("accounting_dir", accounting_dir, STRING),
+ CONFIG("setuid", target_uid, INT),
+ CONFIG("dump_speed", dump_speed, BOOL),
+ { NULL, 0, 0, 0 },
+};
+
char *plugin_functions[] = {
NULL,
"plugin_pre_auth",
"plugin_packet_rx",
"plugin_packet_tx",
"plugin_timer",
- "plugin_config",
"plugin_new_session",
"plugin_kill_session",
"plugin_control",
};
#define max_plugin_functions (sizeof(plugin_functions) / sizeof(char *))
-tunnelt *tunnel = NULL; // 1000 * 45 = 45000 = 45k
+tunnelt *tunnel = NULL; // 1000 * 45 = 45000 = 45k
sessiont *session = NULL; // 5000 * 213 = 1065000 = 1 Mb
radiust *radius = NULL;
ippoolt *ip_address_pool = NULL;
-tunnelidt tunnelfree; // free list link heads
-sessionidt sessionfree = 0;
-u8 radiusfree;
controlt *controlfree = 0;
struct Tstats *_statistics = NULL;
#ifdef RINGBUFFER
void read_config_file();
void read_state();
void dump_state();
+void tunnel_clean();
+tunnelidt new_tunnel();
+void update_config();
// return internal time (10ths since run)
clockt now(void)
void _log(int level, ipt address, sessionidt s, tunnelidt t, const char *format, ...)
{
+ static char message[65535] = {0};
+ static char message2[65535] = {0};
va_list ap;
#ifdef RINGBUFFER
}
#endif
- if (debug < level) return;
+ if (config->debug < level) return;
- if (!log_stream && log_filename)
+ va_start(ap, format);
+ if (log_stream)
{
- if ((log_stream = fopen(log_filename, "a")))
- fseek(log_stream, 0, SEEK_END);
- setbuf(log_stream, NULL);
+ vsnprintf(message2, 65535, format, ap);
+ snprintf(message, 65535, "%s %02d/%02d %s", time_now_string, t, s, message2);
+ fprintf(log_stream, message);
}
- if (!log_stream)
+ else if (syslog_log)
{
- log_stream = stderr;
- setbuf(log_stream, NULL);
+ vsnprintf(message2, 65535, format, ap);
+ snprintf(message, 65535, "%02d/%02d %s", t, s, message2);
+ syslog(level + 2, message); // We don't need LOG_EMERG or LOG_ALERT
}
-
- va_start(ap, format);
- fprintf(log_stream, "%s %02d/%02d ", time_now_string, t, s);
- vfprintf(log_stream, format, ap);
va_end(ap);
}
void _log_hex(int level, ipt address, sessionidt s, tunnelidt t, const char *title, const char *data, int maxsize)
{
- unsigned int i, j;
+ int i, j;
unsigned const char *d = (unsigned const char *)data;
- if (debug < level) return;
- log(level, address, s, t, "%s (%d bytes):\n", title, maxsize);
- setvbuf(log_stream, NULL, _IOFBF, 16384);
- for (i = 0; i < maxsize; )
+ if (config->debug < level) return;
+
+ // No support for log_hex to syslog
+ if (log_stream)
{
- fprintf(log_stream, "%4X: ", i);
- for (j = i; j < maxsize && j < (i + 16); j++)
- {
- fprintf(log_stream, "%02X ", d[j]);
- if (j == i + 7)
- fputs(": ", log_stream);
- }
+ log(level, address, s, t, "%s (%d bytes):\n", title, maxsize);
+ setvbuf(log_stream, NULL, _IOFBF, 16384);
- for (; j < i + 16; j++)
+ for (i = 0; i < maxsize; )
{
- fputs(" ", log_stream);
- if (j == i + 7)
- fputs(": ", log_stream);
- }
+ fprintf(log_stream, "%4X: ", i);
+ for (j = i; j < maxsize && j < (i + 16); j++)
+ {
+ fprintf(log_stream, "%02X ", d[j]);
+ if (j == i + 7)
+ fputs(": ", log_stream);
+ }
- fputs(" ", log_stream);
- for (j = i; j < maxsize && j < (i + 16); j++)
- {
- if (d[j] >= 0x20 && d[j] < 0x7f && d[j] != 0x20)
- fputc(d[j], log_stream);
- else
- fputc('.', log_stream);
+ for (; j < i + 16; j++)
+ {
+ fputs(" ", log_stream);
+ if (j == i + 7)
+ fputs(": ", log_stream);
+ }
- if (j == i + 7)
- fputs(" ", log_stream);
+ fputs(" ", log_stream);
+ for (j = i; j < maxsize && j < (i + 16); j++)
+ {
+ if (d[j] >= 0x20 && d[j] < 0x7f && d[j] != 0x20)
+ fputc(d[j], log_stream);
+ else
+ fputc('.', log_stream);
+
+ if (j == i + 7)
+ fputs(" ", log_stream);
+ }
+
+ i = j;
+ fputs("\n", log_stream);
}
- i = j;
- fputs("\n", log_stream);
+ fflush(log_stream);
+ setbuf(log_stream, NULL);
}
- fflush(log_stream);
- setbuf(log_stream, NULL);
}
{
struct rtentry r;
memset(&r, 0, sizeof(r));
- r.rt_dev = tapdevice;
+ r.rt_dev = config->tapdevice;
r.rt_dst.sa_family = AF_INET;
*(u32 *) & (((struct sockaddr_in *) &r.rt_dst)->sin_addr.s_addr) = htonl(ip);
r.rt_gateway.sa_family = AF_INET;
*(u32 *) & (((struct sockaddr_in *) &r.rt_gateway)->sin_addr.s_addr) = htonl(gw);
r.rt_genmask.sa_family = AF_INET;
- *(u32 *) & (((struct sockaddr_in *) &r.rt_genmask)->sin_addr.s_addr) = htonl(mask ? : 0xFFFFFFF);
+ *(u32 *) & (((struct sockaddr_in *) &r.rt_genmask)->sin_addr.s_addr) = htonl(mask ? mask : 0xFFFFFFF);
r.rt_flags = (RTF_UP | RTF_STATIC);
if (gw)
r.rt_flags |= RTF_GATEWAY;
log(0, 0, 0, 0, "Can't set tap interface: %s\n", strerror(errno));
exit(-1);
}
- assert(strlen(ifr.ifr_name) < sizeof(tapdevice));
- strcpy(tapdevice, ifr.ifr_name);
+ assert(strlen(ifr.ifr_name) < sizeof(config->tapdevice));
+ strncpy(config->tapdevice, ifr.ifr_name, sizeof(config->tapdevice) - 1);
ifrfd = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
sin.sin_family = AF_INET;
- sin.sin_addr.s_addr = handle_interface ? bind_address : 0x01010101; // 1.1.1.1
+ sin.sin_addr.s_addr = handle_interface ? config->bind_address : 0x01010101; // 1.1.1.1
memcpy(&ifr.ifr_addr, &sin, sizeof(struct sockaddr));
if (ioctl(ifrfd, SIOCSIFADDR, (void *) &ifr) < 0)
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_port = htons(L2TPPORT);
- addr.sin_addr.s_addr = bind_address;
+ addr.sin_addr.s_addr = config->bind_address;
udpfd = socket(AF_INET, SOCK_DGRAM, UDP);
setsockopt(udpfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
if (bind(udpfd, (void *) &addr, sizeof(addr)) < 0)
{
- perror("bind");
+ perror("udp bind");
exit( -1);
}
snoopfd = socket(AF_INET, SOCK_DGRAM, UDP);
// Find session by IP, 0 for not found
sessionidt sessionbyip(ipt ip)
{
- unsigned char *a = (char *)&ip;
+ unsigned char *a = (unsigned char *)&ip;
char **d = (char **) ip_hash;
#ifdef STAT_CALLS
void cache_sessionid(ipt ip, sessionidt s)
{
- unsigned char *a = (char *) &ip;
+ unsigned char *a = (unsigned char *) &ip;
char **d = (char **) ip_hash;
int i;
void uncache_sessionid(ipt ip)
{
- unsigned char *a = (char *) &ip;
+ unsigned char *a = (unsigned char *) &ip;
char **d = (char **) ip_hash;
int i;
}
// Find session by username, 0 for not found
-// walled garden'd users aren't authenticated, so the username is
+// walled garden users aren't authenticated, so the username is
// reasonably useless. Ignore them to avoid incorrect actions
sessionidt sessionbyuser(char *username)
{
exit(-1);
}
memset(&ifr, 0, sizeof(ifr));
- strcpy(ifr.ifr_name, "eth0");
+ strncpy(ifr.ifr_name, "eth0", sizeof(ifr.ifr_name) - 1);
if (ioctl(s, SIOCGIFHWADDR, &ifr) < 0)
{
perror("get eth0 hwaddr");
ip = *(u32 *)(buf + 16);
if (!(s = sessionbyip(ip)))
{
-// log(4, 0, 0, 0, "IP: Can't find session for IP %s\n", inet_toa(ip));
+ log(4, 0, 0, 0, "IP: Sending ICMP host unreachable to %s\n", inet_toa(*(u32 *)(buf + 12)));
+ host_unreachable(*(u32 *)(buf + 12), *(u16 *)(buf + 4), ip, buf, (len < 64) ? 64 : len);
return;
}
t = session[s].tunnel;
u8 *p = makeppp(b, buf, len, t, s, PPPIP);
tunnelsend(b, len + (p-b), t); // send it...
sp->cout += len; // byte count
+ sp->total_cout += len; // byte count
sp->pout++;
udp_tx += len;
}
u8 r = session[s].radius;
if (!r)
{
- if (!radiusfree)
+ if (!(r = radiusnew(s)))
{
log(1, 0, s, session[s].tunnel, "No free RADIUS sessions for Stop message\n");
STAT(radius_overflow);
- } else {
+ }
+ else
+ {
int n;
- r = radiusnew(s);
for (n = 0; n < 15; n++)
radius[r].auth[n] = rand();
}
}
}
if (session[s].throttle) throttle_session(s, 0); session[s].throttle = 0;
- free_ip_address(session[s].ip);
- session[s].ip = 0;
+ free_ip_address(s);
}
{ // Send CDN
controlt *c = controlnew(14); // sending CDN
*(u16 *) (q + 2) = htons(10);
q[4] = 3;
q[5] = 6;
- *(u32 *) (q + 6) = htonl(myip ? : session[s].ip); // send my IP (use theirs if I dont have one)
+ *(u32 *) (q + 6) = htonl(myip ? myip : session[s].ip); // send my IP (use theirs if I dont have one)
tunnelsend(buf, 10 + (q - buf), t); // send it
}
#endif
sessionshutdown(s, reason); // close radius/routes, etc.
if (session[s].radius)
- radius[session[s].radius].session = 0; // cant send clean accounting data, session is killed
+ radiusclear(session[s].radius, 0); // cant send clean accounting data, session is killed
memset(&session[s], 0, sizeof(session[s]));
session[s].next = sessionfree;
sessionfree = s;
#ifdef STAT_CALLS
STAT(call_tunnelkill);
#endif
+
+ tunnel[t].state = TUNNELDIE;
+
// free control messages
while ((c = tunnel[t].controls))
{
controlfree = c;
}
// kill sessions
- for (s = 0; s < MAXSESSION; s++)
+ for (s = 1; s < MAXSESSION; s++)
if (session[s].tunnel == t)
sessionkill(s, reason);
+
// free tunnel
- memset(&tunnel[t], 0, sizeof(tunnel[t]));
- tunnel[t].next = tunnelfree;
+ tunnelclear(t);
cluster_send_tunnel(t);
log(1, 0, 0, t, "Kill tunnel %d: %s\n", t, reason);
- tunnelfree = t;
+ tunnel[t].die = 0;
+ tunnel[t].state = TUNNELFREE;
}
-// shut down a tunnel
+// shut down a tunnel cleanly
void tunnelshutdown(tunnelidt t, char *reason)
{
sessionidt s;
#ifdef STAT_CALLS
STAT(call_tunnelshutdown);
#endif
- if (!tunnel[t].last || !tunnel[t].far)
- { // never set up, can immediately kill
+ if (!tunnel[t].last || !tunnel[t].far || tunnel[t].state == TUNNELFREE)
+ {
+ // never set up, can immediately kill
tunnelkill(t, reason);
return;
}
log(1, 0, 0, t, "Shutting down tunnel %d (%s)\n", t, reason);
+
// close session
- for (s = 0; s < MAXSESSION; s++)
+ for (s = 1; s < MAXSESSION; s++)
if (session[s].tunnel == t)
sessionkill(s, reason);
+
+ tunnel[t].state = TUNNELDIE;
tunnel[t].die = now() + 700; // Clean up in 70 seconds
cluster_send_tunnel(t);
// TBA - should we wait for sessions to stop?
return;
}
l -= (p - buf);
- if (t) tunnel[t].last = time_now;
if (*buf & 0x80)
{ // control
u16 message = 0xFFFF; // message type
// if no tunnel specified, assign one
if (!t)
{
- /*
- ipt ip = ntohl(*(ipt *) & addr->sin_addr);
- portt port = ntohs(addr->sin_port);
-
- // find existing tunnel that was not fully set up
- for (t = 0; t < MAXTUNNEL; t++)
- {
- if ((tunnel[t].ip == ip && tunnel[t].port == port) &&
- (!tunnel[t].die || !tunnel[t].hostname[0]))
- {
- char buf[600] = {0};
- snprintf(buf, 600, "Duplicate tunnel with %d. ip=%u port=%d die=%d hostname=%s",
- t, tunnel[t].ip, tunnel[t].port, tunnel[t].die, tunnel[t].hostname);
- tunnelshutdown(t, buf);
- break;
- }
- }
- */
-
- t = tunnelfree;
- if (!t)
+ if (!(t = new_tunnel()))
{
log(1, ntohl(addr->sin_addr.s_addr), 0, 0, "No more tunnels\n");
STAT(tunnel_overflow);
return;
}
- tunnelfree = tunnel[t].next;
- memset(&tunnel[t], 0, sizeof(tunnelt));
+ tunnelclear(t);
tunnel[t].ip = ntohl(*(ipt *) & addr->sin_addr);
tunnel[t].port = ntohs(addr->sin_port);
tunnel[t].window = 4; // default window
log(1, ntohl(addr->sin_addr.s_addr), 0, t, " New tunnel from %u.%u.%u.%u/%u ID %d\n", tunnel[t].ip >> 24, tunnel[t].ip >> 16 & 255, tunnel[t].ip >> 8 & 255, tunnel[t].ip & 255, tunnel[t].port, t);
STAT(tunnel_created);
}
- { // check sequence of this message
+
+ // This is used to time out old tunnels
+ tunnel[t].lastrec = time_now;
+
+ // check sequence of this message
+ {
int skip = tunnel[t].window; // track how many in-window packets are still in queue
if (tunnel[t].controlc)
{ // some to clear maybe
// controlnull(t);
return;
}
- if (l)
- tunnel[t].nr++; // receiver advance (do here so quoted correctly in any sends below)
- if (skip < 0)
- skip = 0;
+ // receiver advance (do here so quoted correctly in any sends below)
+ if (l) tunnel[t].nr++;
+ if (skip < 0) skip = 0;
if (skip < tunnel[t].controlc)
- { // some control packets can now be sent that were previous stuck out of window
+ {
+ // some control packets can now be sent that were previous stuck out of window
int tosend = tunnel[t].window - skip;
controlt *c = tunnel[t].controls;
while (c && skip)
if (flags & 0x40)
{
// handle hidden AVPs
- if (!l2tpsecret)
+ if (!*config->l2tpsecret)
{
log(1, ntohl(addr->sin_addr.s_addr), s, t, "Hidden AVP requested, but no L2TP secret.\n");
fatal = flags;
}
if (n > 4) {
/* %*s doesn't work?? */
- char buf[n-4+2];
- memcpy(buf, b+4, n-4);
- buf[n-4+1] = '\0';
+ char *buf = (char *)strndup(b+4, n-4);
log(4, ntohl(addr->sin_addr.s_addr), s, t, " Error String: %s\n",
buf);
+ free(buf);
}
break;
}
// log(4, ntohl(addr->sin_addr.s_addr), s, t, "Bearer capabilities\n");
break;
case 5: // tie breaker
- // We never open tunnels, so we don't
- // care about tie breakers
+ // We never open tunnels, so we don't care about tie breakers
// log(4, ntohl(addr->sin_addr.s_addr), s, t, "Tie breaker\n");
continue;
case 6: // firmware revision
control16(c, 9, t, 1); // assigned tunnel
controladd(c, t, s); // send the resply
}
+ tunnel[t].state = TUNNELOPENING;
break;
case 2: // SCCRP
- // TBA
+ tunnel[t].state = TUNNELOPEN;
break;
case 3: // SCCN
+ tunnel[t].state = TUNNELOPEN;
controlnull(t); // ack
break;
case 4: // StopCCN
u8 r;
controlt *c;
+ s = sessionfree;
+ sessionfree = session[s].next;
+ memset(&session[s], 0, sizeof(session[s]));
+
// make a RADIUS session
- if (!radiusfree)
+ if (!(r = radiusnew(s)))
{
- STAT(radius_overflow);
log(1, ntohl(addr->sin_addr.s_addr), s, t, "No free RADIUS sessions for ICRQ\n");
+ sessionkill(s, "no free RADIUS sesions");
return;
}
c = controlnew(11); // sending ICRP
- s = sessionfree;
- sessionfree = session[s].next;
- memset(&session[s], 0, sizeof(session[s]));
session[s].id = sessionid++;
session[s].opened = time(NULL);
session[s].tunnel = t;
session[s].far = asession;
+ session[s].last_packet = time_now;
log(3, ntohl(addr->sin_addr.s_addr), 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
- r = radiusfree;
- radiusfree = radius[r].next;
- memset(&radius[r], 0, sizeof(radius[r]));
- session[s].radius = r;
- radius[r].session = s;
{
// Generate a random challenge
int n;
for (n = 0; n < 15; n++)
radius[r].auth[n] = rand();
}
- strcpy(radius[r].calling, calling);
- strcpy(session[s].called, called);
- strcpy(session[s].calling, calling);
+ 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;
FD_SET(tapfd, &cr);
FD_SET(radfd, &cr);
FD_SET(controlfd, &cr);
-#ifdef HAVE_LIBCLI
FD_SET(clifd, &cr);
-#endif
if (cluster_sockfd) FD_SET(cluster_sockfd, &cr);
cn = udpfd;
if (cn < radfd) cn = radfd;
if (cn < tapfd) cn = tapfd;
if (cn < controlfd) cn = controlfd;
-#ifdef HAVE_LIBCLI
if (cn < clifd) cn = clifd;
-#endif
if (cn < cluster_sockfd) cn = cluster_sockfd;
while (!main_quit)
{
fd_set r;
int n = cn;
+
+ if (config->reload_config)
+ {
+ // Update the config state based on config settings
+ update_config();
+ }
+
memcpy(&r, &cr, sizeof(fd_set));
n = select(n + 1, &r, 0, 0, &to);
if (n < 0)
processcluster(buf, recvfrom(cluster_sockfd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen));
else if (FD_ISSET(controlfd, &r))
processcontrol(buf, recvfrom(controlfd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen), &addr);
-#ifdef HAVE_LIBCLI
else if (FD_ISSET(clifd, &r))
{
struct sockaddr_in addr;
close(sockfd);
}
}
-#endif
else
{
log(1, 0, 0, 0, "Main select() loop returned %d, but no fds have data waiting\n", n);
sessionidt s;
tunnelidt t;
u8 r;
- for (r = 0; r < MAXRADIUS; r++)
+
+ for (r = 1; r < MAXRADIUS; r++)
if (radius[r].state && radius[r].retry)
{
if (radius[r].retry <= when)
if (radius[r].retry && radius[r].retry < best)
best = radius[r].retry;
}
- for (t = 0; t < MAXTUNNEL; t++)
+ for (t = 1; t < MAXTUNNEL; t++)
{
// check for expired tunnels
if (tunnel[t].die && tunnel[t].die <= when)
best = tunnel[t].retry;
}
// Send hello
- if (tunnel[t].ip && !tunnel[t].die && tunnel[t].last < when + 600 && !tunnel[t].controlc)
+ if (tunnel[t].state == TUNNELOPEN && tunnel[t].lastrec < when + 600)
{
controlt *c = controlnew(6); // sending HELLO
controladd(c, t, 0); // send the message
}
}
-#ifdef HAVE_LIBCLI
// Check for sessions that have been killed from the CLI
if (cli_session_kill[0])
{
int i;
- for (i = 0; i < MAXSESSION && cli_session_kill[i]; i++)
+ for (i = 1; i < MAXSESSION && cli_session_kill[i]; i++)
{
log(2, 0, cli_session_kill[i], 0, "Dropping session by CLI\n");
- sessionshutdown(cli_session_kill[i], "Requested by CLI");
+ sessionshutdown(cli_session_kill[i], "Requested by administrator");
cli_session_kill[i] = 0;
}
}
if (cli_tunnel_kill[0])
{
int i;
- for (i = 0; i < MAXTUNNEL && cli_tunnel_kill[i]; i++)
+ for (i = 1; i < MAXTUNNEL && cli_tunnel_kill[i]; i++)
{
log(2, 0, cli_tunnel_kill[i], 0, "Dropping tunnel by CLI\n");
- tunnelshutdown(cli_tunnel_kill[i], "Requested by CLI");
+ tunnelshutdown(cli_tunnel_kill[i], "Requested by administrator");
cli_tunnel_kill[i] = 0;
}
}
-#endif
- for (s = 0; s < MAXSESSION; s++)
+ for (s = 1; s < MAXSESSION; s++)
{
// check for expired sessions
if (session[s].die && session[s].die <= when)
{
- STAT(session_timeout);
sessionkill(s, "Expired");
continue;
}
// Drop sessions who have not responded within IDLE_TIMEOUT seconds
- if (session[s].user[0] && (time_now - session[s].last_packet >= IDLE_TIMEOUT))
+ if (session[s].last_packet && (time_now - session[s].last_packet >= IDLE_TIMEOUT))
{
sessionkill(s, "No response to LCP ECHO requests");
+ STAT(session_timeout);
continue;
}
continue;
}
}
- if (accounting_dir && next_acct <= when)
+ if (config->accounting_dir && next_acct <= when)
{
// Dump accounting data
next_acct = when + ACCT_TIME;
{
// Dump accounting data
next_cluster_ping = when + 50;
- cluster_send_message(cluster_address, bind_address, C_PING, hostname, strlen(hostname));
+ cluster_send_message(config->cluster_address, config->bind_address, C_PING, hostname, strlen(hostname));
}
if (best <= when)
int i;
_statistics = mmap(NULL, sizeof(struct Tstats), PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0);
- if (_statistics <= 0)
+ if (_statistics == MAP_FAILED)
{
log(0, 0, 0, 0, "Error doing mmap for _statistics: %s\n", strerror(errno));
exit(1);
}
+ config = mmap(NULL, sizeof(struct configt), PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0);
+ if (config == MAP_FAILED)
+ {
+ log(0, 0, 0, 0, "Error doing mmap for configuration: %s\n", strerror(errno));
+ exit(1);
+ }
+ memset(config, 0, sizeof(struct configt));
+ time(&config->start_time);
+ strncpy(config->config_file, CONFIGFILE, sizeof(config->config_file) - 1);
tunnel = mmap(NULL, sizeof(tunnelt) * MAXTUNNEL, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0);
- if (tunnel <= 0)
+ if (tunnel == MAP_FAILED)
{
log(0, 0, 0, 0, "Error doing mmap for tunnels: %s\n", strerror(errno));
exit(1);
}
session = mmap(NULL, sizeof(sessiont) * MAXSESSION, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0);
- if (session <= 0)
+ if (session == MAP_FAILED)
{
log(0, 0, 0, 0, "Error doing mmap for sessions: %s\n", strerror(errno));
exit(1);
}
radius = mmap(NULL, sizeof(radiust) * MAXRADIUS, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0);
- if (radius <= 0)
+ if (radius == MAP_FAILED)
{
log(0, 0, 0, 0, "Error doing mmap for radius: %s\n", strerror(errno));
exit(1);
}
ip_address_pool = mmap(NULL, sizeof(ippoolt) * MAXIPPOOL, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0);
- if (ip_address_pool <= 0)
+ if (ip_address_pool == MAP_FAILED)
{
log(0, 0, 0, 0, "Error doing mmap for radius: %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 <= 0)
+ if (ringbuffer == MAP_FAILED)
{
log(0, 0, 0, 0, "Error doing mmap for radius: %s\n", strerror(errno));
exit(1);
memset(ringbuffer, 0, sizeof(struct Tringbuffer));
#endif
-#ifdef HAVE_LIBCLI
cli_session_kill = mmap(NULL, sizeof(sessionidt) * MAXSESSION, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0);
- if (cli_session_kill <= 0)
+ if (cli_session_kill == MAP_FAILED)
{
log(0, 0, 0, 0, "Error doing mmap for cli session kill: %s\n", strerror(errno));
exit(1);
}
memset(cli_session_kill, 0, sizeof(sessionidt) * MAXSESSION);
cli_tunnel_kill = mmap(NULL, sizeof(tunnelidt) * MAXSESSION, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0);
- if (cli_tunnel_kill <= 0)
+ if (cli_tunnel_kill == MAP_FAILED)
{
log(0, 0, 0, 0, "Error doing mmap for cli tunnel kill: %s\n", strerror(errno));
exit(1);
memset(cli_tunnel_kill, 0, sizeof(tunnelidt) * MAXSESSION);
filter_buckets = mmap(NULL, sizeof(tbft) * MAXSESSION, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0);
- if (filter_buckets <= 0)
+ if (filter_buckets == MAP_FAILED)
{
log(0, 0, 0, 0, "Error doing mmap for filter buckets: %s\n", strerror(errno));
exit(1);
}
memset(filter_buckets, 0, sizeof(tbft) * MAXSESSION);
-#endif
-
memset(tunnel, 0, sizeof(tunnelt) * MAXTUNNEL);
memset(session, 0, sizeof(sessiont) * MAXSESSION);
memset(radius, 0, sizeof(radiust) * MAXRADIUS);
memset(ip_address_pool, 0, sizeof(ippoolt) * MAXIPPOOL);
- for (i = 1; i < MAXTUNNEL - 1; i++)
- tunnel[i].next = i + 1;
- tunnel[MAXTUNNEL - 1].next = 0;
- tunnelfree = 1;
for (i = 1; i < MAXSESSION - 1; i++)
session[i].next = i + 1;
session[MAXSESSION - 1].next = 0;
sessionfree = 1;
- for (i = 1; i < MAXRADIUS - 1; i++)
- radius[i].next = i + 1;
- radius[MAXRADIUS - 1].next = 0;
- radiusfree = 1;
if (!*hostname)
{
+ char *p;
// Grab my hostname unless it's been specified
gethostname(hostname, sizeof(hostname));
{
if (h)
myip = ntohl(*(u32 *) h->h_addr);
}
+
+ if ((p = strstr(hostname, ".optusnet.com.au"))) *p = 0;
}
_statistics->start_time = _statistics->last_reset = time(NULL);
-
- // Start the timer routine off
- time(&time_now);
- strftime(time_now_string, 64, "%Y-%m-%d %H:%M:%S", localtime(&time_now));
}
void initiptables(void)
system("iptables -t mangle -F l2tpns");
}
-ipt assign_ip_address()
+int assign_ip_address(sessionidt s)
{
- int c = 0;
+ unsigned i;
+ int best = -1;
+ clockt best_time = time_now;
+ char *u = session[s].user;
+ char reuse = 0;
+
#ifdef STAT_CALLS
STAT(call_assign_ip_address);
#endif
- ip_pool_index++;
- while (1)
+ for (i = 0; i < ip_pool_size; i++)
{
- if (ip_pool_index >= ip_pool_size)
+ if (!ip_address_pool[i].address || ip_address_pool[i].assigned)
+ continue;
+
+ if (!session[s].walled_garden && ip_address_pool[i].user[0] && !strcmp(u, ip_address_pool[i].user))
{
- if (++c == 2)
- return 0;
- ip_pool_index = 0;
+ best = i;
+ reuse = 1;
+ break;
}
- if (!ip_address_pool[ip_pool_index].assigned && ip_address_pool[ip_pool_index].address)
+
+ if (ip_address_pool[i].last < best_time)
{
- ip_address_pool[ip_pool_index].assigned = 1;
- log(4, ip_address_pool[ip_pool_index].address, 0, 0, "assign_ip_address(): Allocating ip address %lu from pool\n", ip_pool_index);
- STAT(ip_allocated);
- return ntohl(ip_address_pool[ip_pool_index].address);
+ best = i;
+ if (!(best_time = ip_address_pool[i].last))
+ break; // never used, grab this one
}
- ip_pool_index++;
}
- return 0;
+
+ if (best < 0)
+ {
+ log(0, 0, s, session[s].tunnel, "assign_ip_address(): out of addresses\n");
+ return 0;
+ }
+
+ session[s].ip = ntohl(ip_address_pool[best].address);
+ session[s].ip_pool_index = best;
+ ip_address_pool[best].assigned = 1;
+ ip_address_pool[best].last = time_now;
+ if (session[s].walled_garden)
+ /* Don't track addresses of users in walled garden (note: this
+ means that their address isn't "sticky" even if they get
+ un-gardened). */
+ ip_address_pool[best].user[0] = 0;
+ else
+ strncpy(ip_address_pool[best].user, u, sizeof(ip_address_pool[best].user) - 1);
+
+ STAT(ip_allocated);
+ log(4, ip_address_pool[best].address, s, session[s].tunnel,
+ "assign_ip_address(): %s ip address %lu from pool\n", reuse ? "Reusing" : "Allocating", best);
+
+ return 1;
}
-void free_ip_address(ipt address)
+void free_ip_address(sessionidt s)
{
- int i;
- ipt a;
+ int i = session[s].ip_pool_index;
+
#ifdef STAT_CALLS
STAT(call_free_ip_address);
#endif
- a = ntohl(address);
- for (i = 0; i <= ip_pool_size; i++)
- {
- if (ip_address_pool[i].address == a)
- {
- STAT(ip_freed);
- ip_address_pool[i].assigned = 0;
- }
- }
- uncache_sessionid(htonl(address));
+ if (!session[s].ip)
+ return; // what the?
+
+ STAT(ip_freed);
+ uncache_sessionid(session[s].ip);
+ session[s].ip = 0;
+ ip_address_pool[i].assigned = 0;
+ ip_address_pool[i].last = time_now;
}
// Initialize the IP address pool
exit(-1);
}
// This entry is for a specific IP only
- if (src != bind_address)
+ if (src != config->bind_address)
continue;
*p = ':';
pool = p+1;
// Add a static route for this pool
log(5, 0, 0, 0, "Adding route for address pool %s/%d\n", inet_toa(htonl(start)), 32+mask);
memset(&r, 0, sizeof(r));
- r.rt_dev = tapdevice;
+ r.rt_dev = config->tapdevice;
r.rt_dst.sa_family = AF_INET;
*(u32 *) & (((struct sockaddr_in *) &r.rt_dst)->sin_addr.s_addr) = htonl(start);
r.rt_genmask.sa_family = AF_INET;
if (!snoop_addr.sin_port || snoopfd <= 0 || size <= 0 || !packet)
return;
+ log(5, 0, 0, 0, "Snooping packet at %p (%d bytes) to %s:%d\n", packet, size, inet_toa(snoop_addr.sin_addr.s_addr), htons(snoop_addr.sin_port));
if (sendto(snoopfd, packet, size, MSG_DONTWAIT | MSG_NOSIGNAL, (void *) &snoop_addr, sizeof(snoop_addr)) < 0)
log(0, 0, 0, 0, "Error sending intercept packet: %s\n", strerror(errno));
STAT(packets_snooped);
STAT(call_dump_acct_info);
#endif
strftime(timestr, 64, "%Y%m%d%H%M%S", localtime(&t));
- snprintf(filename, 1024, "%s/%s", accounting_dir, timestr);
+ snprintf(filename, 1024, "%s/%s", config->accounting_dir, timestr);
for (i = 0; i < MAXSESSION; i++)
{
time(&basetime); // start clock
// scan args
- while ((o = getopt(argc, argv, "vc:f:h:a:")) >= 0)
+ while ((o = getopt(argc, argv, "vc:h:a:")) >= 0)
{
switch (o)
{
case 'v':
- debug++;
+ config->debug++;
break;
case 'c':
- config_file = strdup(optarg);
- break;
- case 'f':
- log_filename = strdup(optarg);
+ strncpy(config->config_file, optarg, sizeof(config->config_file) - 1);
break;
case 'h':
- strncpy(hostname, optarg, 1000);
+ strncpy(hostname, optarg, 999);
break;
case 'a':
myip = inet_addr(optarg);
log(0, 0, 0, 0, "Invalid ip %s\n", optarg);
exit(-1);
}
- bind_address = myip;
+ config->bind_address = myip;
handle_interface = 1;
break;
case '?':
default:
- printf("Args are:\n\t-c <file>\tConfig file\n\t-h <hostname>\tForce hostname\n\t-a <address>\tUse specific address\n\t-f <file>\tLog File\n\t-v\t\tDebug\n");
+ printf("Args are:\n\t-c <file>\tConfig file\n\t-h <hostname>\tForce hostname\n\t-a <address>\tUse specific address\n\t-v\t\tDebug\n");
return (0);
break;
}
}
+ // Start the timer routine off
+ time(&time_now);
+ strftime(time_now_string, 64, "%Y-%m-%d %H:%M:%S", localtime(&time_now));
+
initiptables();
initplugins();
- read_config_file();
initdata();
- log(0, 0, 0, 0, "$Id: l2tpns.c,v 1.1 2003/12/16 07:07:39 fred_nerk Exp $\n(c) Copyright 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced\n");
+ init_cli();
+ read_config_file();
+ log(1, 0, 0, 0, "L2TPNS Version 1.1.0 - http://l2tpns.sourceforge.net/\n");
+ log(1, 0, 0, 0, "Licensed under the GPL\n");
/* Start up the cluster first, so that we don't have two machines with
* the same IP at once.
* This is still racy, but the second GARP should fix that
*/
- cluster_init(bind_address, 0);
- cluster_send_message(cluster_address, bind_address, C_HELLO, hostname, strlen(hostname));
+ cluster_init(config->bind_address, 0);
+ cluster_send_message(config->cluster_address, config->bind_address, C_HELLO, hostname, strlen(hostname));
inittap();
- log(1, 0, 0, 0, "Set up on interface %s\n", tapdevice);
+ log(1, 0, 0, 0, "Set up on interface %s\n", config->tapdevice);
initudp();
initrad();
initippool();
init_rl();
if (handle_interface) {
- send_garp(bind_address);
+ send_garp(config->bind_address);
}
- read_state();
-#ifdef HAVE_LIBCLI
- init_cli();
-#endif
+ // If NOSTATEFILE exists, we will ignore any updates from the cluster master for this execution
+ if (!unlink(NOSTATEFILE))
+ config->ignore_cluster_updates = 1;
+
+ read_state();
signal(SIGALRM, sigalrm_handler);
signal(SIGHUP, sighup_handler);
signal(SIGQUIT, sigquit_handler);
signal(SIGCHLD, sigchild_handler);
signal(SIGSEGV, sigsegv_handler);
- if (debug)
- {
- int n;
- for (n = 0; n < numradiusservers; n++)
- log(1, 0, 0, 0, "RADIUS to %s\n", inet_toa(htonl(radiusserver[n])));
- }
alarm(1);
// Drop privileges here
- if (target_uid > 0 && geteuid() == 0)
- setuid(target_uid);
+ if (config->target_uid > 0 && geteuid() == 0)
+ setuid(config->target_uid);
mainloop();
-
- if (l2tpsecret) free(l2tpsecret);
- if (log_filename) free(log_filename);
- if (snoop_destination_host) free(snoop_destination_host);
- if (radiussecret) free(radiussecret);
-
return 0;
}
void sighup_handler(int junk)
{
- if (log_stream != stderr)
+ if (log_stream && log_stream != stderr)
+ {
fclose(log_stream);
+ log_stream = NULL;
+ }
- log_stream = NULL;
read_config_file();
}
void sigalrm_handler(int junk)
{
// Log current traffic stats
- if (dump_speed)
- {
- printf("UDP-ETH:%1.0f/%1.0f ETH-UDP:%1.0f/%1.0f TOTAL:%0.1f IN:%lu OUT:%lu\n",
- (udp_rx / 1024.0 / 1024.0 * 8),
- (eth_tx / 1024.0 / 1024.0 * 8),
- (eth_rx / 1024.0 / 1024.0 * 8),
- (udp_tx / 1024.0 / 1024.0 * 8),
- ((udp_tx + udp_rx + eth_tx + eth_rx) / 1024.0 / 1024.0 * 8),
- udp_rx_pkt, eth_rx_pkt);
- udp_tx = udp_rx = 0;
- udp_rx_pkt = eth_rx_pkt = 0;
- eth_tx = eth_rx = 0;
- }
+ snprintf(config->bandwidth, sizeof(config->bandwidth),
+ "UDP-ETH:%1.0f/%1.0f ETH-UDP:%1.0f/%1.0f TOTAL:%0.1f IN:%lu OUT:%lu",
+ (udp_rx / 1024.0 / 1024.0 * 8),
+ (eth_tx / 1024.0 / 1024.0 * 8),
+ (eth_rx / 1024.0 / 1024.0 * 8),
+ (udp_tx / 1024.0 / 1024.0 * 8),
+ ((udp_tx + udp_rx + eth_tx + eth_rx) / 1024.0 / 1024.0 * 8),
+ udp_rx_pkt, eth_rx_pkt);
+
+ udp_tx = udp_rx = 0;
+ udp_rx_pkt = eth_rx_pkt = 0;
+ eth_tx = eth_rx = 0;
+
+ if (config->dump_speed)
+ printf("%s\n", config->bandwidth);
// Update the internal time counter
time(&time_now);
void sigterm_handler(int junk)
{
log(1, 0, 0, 0, "Shutting down cleanly\n");
- if (config_save_state)
+ if (config->save_state)
dump_state();
main_quit++;
}
void sigquit_handler(int junk)
{
+ FILE *f;
int i;
+
log(1, 0, 0, 0, "Shutting down without saving sessions\n");
- for (i = 0; i < MAXSESSION; i++)
+ for (i = 1; i < MAXSESSION; i++)
{
if (session[i].opened)
sessionkill(i, "L2TPNS Closing");
}
- for (i = 0; i < MAXTUNNEL; i++)
+ for (i = 1; i < MAXTUNNEL; i++)
{
- if (tunnel[i].ip)
+ if (tunnel[i].ip || tunnel[i].state)
tunnelshutdown(i, "L2TPNS Closing");
}
+
+ cluster_send_goodbye();
+
+ // Touch a file which says not to reload the state
+ f = fopen(NOSTATEFILE, "w");
+ if (f) fclose(f);
+
main_quit++;
}
void sigchild_handler(int signal)
{
- int status;
- int pid;
-
- pid = wait(&status);
-#ifdef HAVE_LIBCLI
- status = (WIFEXITED(status)) ? WEXITSTATUS(status) : 0;
- if (pid == cli_pid)
- {
- if (status == 0)
- log(3, 0, 0, 0, "CLI client closed connection\n");
- else
- log(2, 0, 0, 0, "CLI child died with rc %d!\n", status);
- }
-#endif
+ while (waitpid(-1, NULL, WNOHANG) > 0)
+ ;
}
-void *backtrace_buffer[30] = {0};
-
void sigsegv_handler(int signal)
{
log(0, 0, 0, 0, "----------------------------------------------\n");
void read_state()
{
- struct stat sb;
- FILE *f;
+ struct stat sb;
+ int i;
+ ippoolt itmp;
+ FILE *f;
+ char magic[sizeof(DUMP_MAGIC)-1];
+ u32 buf[2];
- if (!config_save_state) return;
+ if (!config->save_state)
+ return;
- if (stat(STATEFILE, &sb) < 0)
- return;
+ // Ignore saved state if NOSTATEFILE exists
+ if (config->ignore_cluster_updates)
+ {
+ unlink(STATEFILE);
+ return;
+ }
- if (sb.st_mtime < (time(NULL) - 60))
- {
- log(0, 0, 0, 0, "State file is too old to read\n");
- unlink(STATEFILE);
- return;
- }
+ if (stat(STATEFILE, &sb) < 0)
+ return;
- if (!(f = fopen(STATEFILE, "r")))
+ if (sb.st_mtime < (time(NULL) - 60))
+ {
+ log(0, 0, 0, 0, "State file is too old to read, ignoring\n");
+ unlink(STATEFILE);
+ return;
+ }
+
+ f = fopen(STATEFILE, "r");
+ unlink(STATEFILE);
+
+ if (!f)
+ {
+ log(0, 0, 0, 0, "Can't read state file: %s\n", strerror(errno));
+ exit(1);
+ }
+
+ if (fread(magic, sizeof(magic), 1, f) != 1 || strncmp(magic, DUMP_MAGIC, sizeof(magic)))
+ {
+ log(0, 0, 0, 0, "Bad state file magic\n");
+ exit(1);
+ }
+
+ log(1, 0, 0, 0, "Reading state information\n");
+ if (fread(buf, sizeof(buf), 1, f) != 1 || buf[0] > MAXIPPOOL || buf[1] != sizeof(ippoolt))
+ {
+ log(0, 0, 0, 0, "Error/mismatch reading ip pool header from state file\n");
+ exit(1);
+ }
+
+ if (buf[0] > ip_pool_size)
+ {
+ log(0, 0, 0, 0, "ip pool has shrunk! state = %d, current = %d\n", buf[0], ip_pool_size);
+ exit(1);
+ }
+
+ log(2, 0, 0, 0, "Loading %u ip addresses\n", buf[0]);
+ for (i = 0; i < buf[0]; i++)
+ {
+ if (fread(&itmp, sizeof(itmp), 1, f) != 1)
{
- log(0, 0, 0, 0, "Can't read state file: %s\n", strerror(errno));
- unlink(STATEFILE);
- return;
+ log(0, 0, 0, 0, "Error reading ip %d from state file: %s\n", i, strerror(errno));
+ exit(1);
}
- fseek(f, 0, 0);
- log(1, 0, 0, 0, "Reading state information\n");
+ if (itmp.address != ip_address_pool[i].address)
{
- u32 i, numtunnels;
- if (fread(&numtunnels, sizeof(numtunnels), 1, f) <= 0)
- {
- log(0, 0, 0, 0, "Error reading saved state (tunnel count): %s\n", strerror(errno));
- fclose(f);
- unlink(STATEFILE);
- return;
- }
- log(2, 0, 0, 0, "Reading %lu tunnels\n", numtunnels);
- fread(tunnel, sizeof(tunnelt), numtunnels, f);
- tunnelfree = 0;
- for (i = 0; i < numtunnels; i++)
- {
- tunnel[i].controlc = 0;
- tunnel[i].controls = NULL;
- tunnel[i].controle = NULL;
- if (*tunnel[i].hostname)
- {
- log(3, 0, 0, 0, "Created tunnel for %s\n", tunnel[i].hostname);
- tunnelfree = i;
- }
- }
- tunnelfree++;
+ log(0, 0, 0, 0, "Mismatched ip %d from state file: pool may only be extended\n", i);
+ exit(1);
}
+
+ memcpy(&ip_address_pool[i], &itmp, sizeof(itmp));
+ }
+
+ if (fread(buf, sizeof(buf), 1, f) != 1 || buf[0] != MAXTUNNEL || buf[1] != sizeof(tunnelt))
+ {
+ log(0, 0, 0, 0, "Error/mismatch reading tunnel header from state file\n");
+ exit(1);
+ }
+
+ log(2, 0, 0, 0, "Loading %u tunnels\n", MAXTUNNEL);
+ if (fread(tunnel, sizeof(tunnelt), MAXTUNNEL, f) != MAXTUNNEL)
+ {
+ log(0, 0, 0, 0, "Error reading tunnel data from state file\n");
+ exit(1);
+ }
+
+ for (i = 0; i < MAXTUNNEL; i++)
+ {
+ tunnel[i].controlc = 0;
+ tunnel[i].controls = NULL;
+ tunnel[i].controle = NULL;
+ if (*tunnel[i].hostname)
+ log(3, 0, 0, 0, "Created tunnel for %s\n", tunnel[i].hostname);
+ }
+
+ if (fread(buf, sizeof(buf), 1, f) != 1 || buf[0] != MAXSESSION || buf[1] != sizeof(sessiont))
+ {
+ log(0, 0, 0, 0, "Error/mismatch reading session header from state file\n");
+ exit(1);
+ }
+
+ log(2, 0, 0, 0, "Loading %u sessions\n", MAXSESSION);
+ if (fread(session, sizeof(sessiont), MAXSESSION, f) != MAXSESSION)
+ {
+ log(0, 0, 0, 0, "Error reading session data from state file\n");
+ exit(1);
+ }
+
+ for (i = 0; i < MAXSESSION; i++)
+ {
+ session[i].tbf = 0;
+ session[i].throttle = 0;
+ if (session[i].opened)
{
- u32 i, numsessions;
- if (fread(&numsessions, sizeof(numsessions), 1, f) <= 0)
- {
- log(0, 0, 0, 0, "Error reading saved state (session count): %s\n", strerror(errno));
- fclose(f);
- unlink(STATEFILE);
- return;
- }
- log(2, 0, 0, 0, "Reading %lu sessions\n", numsessions);
- if (fread(session, sizeof(sessiont), numsessions, f) < numsessions)
- {
- log(0, 0, 0, 0, "Error reading saved state (%d sessions): %s\n", numsessions, strerror(errno));
- fclose(f);
- unlink(STATEFILE);
- return;
- }
- for (i = 0; i < numsessions; i++)
- {
- session[i].tbf = 0;
- session[i].throttle = 0;
- if (session[i].opened)
- {
- log(2, 0, i, 0, "Loaded active session for user %s\n", session[i].user);
- if (session[i].ip && session[i].ip != 0xFFFFFFFE)
- {
- int x;
- sessionsetup(session[i].tunnel, i, 0);
- for (x = 0; x < MAXIPPOOL && ip_address_pool[x].address; x++)
- {
- if (ip_address_pool[x].address == session[i].ip)
- {
- ip_address_pool[x].assigned = 1;
- break;
- }
- }
- }
- else
- {
- log(2, 0, i, 0, "No IP for session\n");
- }
- }
- }
- for (i = 0; i < numsessions && session[i].opened; i++)
- sessionfree = session[i].next;
+ log(2, 0, i, 0, "Loaded active session for user %s\n", session[i].user);
+ if (session[i].ip && session[i].ip != 0xFFFFFFFE)
+ sessionsetup(session[i].tunnel, i, 0);
}
- fclose(f);
- log(0, 0, 0, 0, "Loaded saved state information\n");
- unlink(STATEFILE);
+ }
+
+ fclose(f);
+ log(0, 0, 0, 0, "Loaded saved state information\n");
}
void dump_state()
{
- FILE *f;
+ FILE *f;
+ u32 buf[2];
- if (!config_save_state) return;
+ if (!config->save_state)
+ return;
- if ((f = fopen(STATEFILE, "w")))
- {
- u32 i;
- log(1, 0, 0, 0, "Dumping state information\n");
+ do {
+ if (!(f = fopen(STATEFILE, "w")))
+ break;
- i = MAXTUNNEL;
- fwrite(&i, sizeof(i), 1, f); // Number of tunnels
+ log(1, 0, 0, 0, "Dumping state information\n");
- log(2, 0, 0, 0, "Dumping %lu tunnels\n", i);
- fwrite(tunnel, sizeof(tunnelt), MAXTUNNEL, f);
+ if (fwrite(DUMP_MAGIC, sizeof(DUMP_MAGIC)-1, 1, f) != 1) break;
- i = MAXSESSION;
- fwrite(&i, sizeof(i), 1, f); // Number of sessions
- log(2, 0, 0, 0, "Dumping %lu sessions\n", i);
- fwrite(session, sizeof(sessiont), MAXSESSION, f);
+ log(2, 0, 0, 0, "Dumping %u ip addresses\n", ip_pool_size);
+ buf[0] = ip_pool_size;
+ buf[1] = sizeof(ippoolt);
+ if (fwrite(buf, sizeof(buf), 1, f) != 1) break;
+ if (fwrite(ip_address_pool, sizeof(ippoolt), ip_pool_size, f) != ip_pool_size) break;
- fclose(f);
- }
- else
- {
- log(0, 0, 0, 0, "Can't write state information: %s\n", strerror(errno));
- }
- return;
+ log(2, 0, 0, 0, "Dumping %u tunnels\n", MAXTUNNEL);
+ buf[0] = MAXTUNNEL;
+ buf[1] = sizeof(tunnelt);
+ if (fwrite(buf, sizeof(buf), 1, f) != 1) break;
+ if (fwrite(tunnel, sizeof(tunnelt), MAXTUNNEL, f) != MAXTUNNEL) break;
+
+ log(2, 0, 0, 0, "Dumping %u sessions\n", MAXSESSION);
+ buf[0] = MAXSESSION;
+ buf[1] = sizeof(sessiont);
+ if (fwrite(buf, sizeof(buf), 1, f) != 1) break;
+ if (fwrite(session, sizeof(sessiont), MAXSESSION, f) != MAXSESSION) break;
+
+ if (fclose(f) == 0) return; // OK
+ } while (0);
+
+ log(0, 0, 0, 0, "Can't write state information: %s\n", strerror(errno));
+ unlink(STATEFILE);
}
void build_chap_response(char *challenge, u8 id, u16 challenge_length, char **challenge_response)
MD5_CTX ctx;
*challenge_response = NULL;
- if (!l2tpsecret || !*l2tpsecret)
+ if (!*config->l2tpsecret)
{
log(0, 0, 0, 0, "LNS requested CHAP authentication, but no l2tp secret is defined\n");
return;
}
- /*
- if (challenge_length != 16)
- {
- log(0, 0, 0, 0, "Challenge length != 16.\n");
- return;
- }
- */
-
log(4, 0, 0, 0, " Building challenge response for CHAP request\n");
*challenge_response = (char *)calloc(17, 1);
MD5Init(&ctx);
MD5Update(&ctx, &id, 1);
- MD5Update(&ctx, l2tpsecret, strlen(l2tpsecret));
+ MD5Update(&ctx, config->l2tpsecret, strlen(config->l2tpsecret));
MD5Update(&ctx, challenge, challenge_length);
MD5Final(*challenge_response, &ctx);
return;
}
-void read_config_file()
+static int facility_value(char *name)
{
- FILE *f;
- char *buf;
-
- if (!config_file) return;
- if (!(f = fopen(config_file, "r"))) {
- fprintf(stderr, "Can't open config file %s: %s\n", config_file, strerror(errno));
- return;
- }
+ int i;
+ for (i = 0; facilitynames[i].c_name; i++)
+ {
+ if (strcmp(facilitynames[i].c_name, name) == 0)
+ return facilitynames[i].c_val;
+ }
+ return 0;
+}
- if (radiussecret)
- {
- free(radiussecret);
- radiussecret = NULL;
- }
+void update_config()
+{
+ int i;
- if (l2tpsecret)
- {
- free(l2tpsecret);
- l2tpsecret = NULL;
- }
+ snoop_addr.sin_family = AF_INET;
+ snoop_addr.sin_addr.s_addr = config->snoop_destination_host;
+ snoop_addr.sin_port = htons(config->snoop_destination_port);
- if (log_filename)
+ // Update logging
+ closelog();
+ syslog_log = 0;
+ if (log_stream)
{
- free(log_filename);
- log_filename = NULL;
+ fclose(log_stream);
+ log_stream = NULL;
}
-
- if (snoop_destination_host)
+ if (*config->log_filename)
{
- free(snoop_destination_host);
- snoop_destination_host = NULL;
- }
-
- if (numradiusservers) {
- int n;
- for (n = 0; n < numradiusservers; n++)
- radiusserver[n] = 0;
- numradiusservers = 0;
- }
-
- snoop_destination_port = 0L;
- config_save_state = 0;
- rl_rate = 0L;
- debug = 1;
- default_dns1 = default_dns2 = 0;
- radius_accounting = 0;
-
- buf = (char *)malloc(4096);
-
- while (fgets(buf, 4096, f)) {
- char *p, *t;
-
- if (*buf == '#') continue;
- if ((p = strchr(buf, '\n'))) *p = 0;
- p = t = strchr(buf, '=');
- if (!p) continue;
- *p = 0; p++;
- t--;
- while (*p && *p == ' ') p++;
- while (*t && *t == ' ') *t-- = 0;
-
- if (strcmp(buf, "log file") == 0) {
- if (!log_filename)
- log_filename = strdup(p);
- } else if (strcmp(buf, "l2tp secret") == 0) {
- if (!l2tpsecret)
- l2tpsecret = strdup(p);
- log(0, 0, 0, 0, "L2TP Secret is \"%s\"\n", l2tpsecret);
- } else if (strcmp(buf, "radius secret") == 0) {
- if (!radiussecret)
- radiussecret = strdup(p);
- log(4, 0, 0, 0, "Radius Secret is \"%s\"\n", radiussecret);
- } else if (strcmp(buf, "radius accounting") == 0) {
- radius_accounting = atoi(p);
- log(4, 0, 0, 0, "Radius Account is %s\n", radius_accounting ? "on" : "off");
- } else if (strcmp(buf, "throttle rate") == 0) {
- rl_rate = atol(p);
- if (rl_rate == 0)
+ if (strstr(config->log_filename, "file:") == config->log_filename)
+ {
+ if ((log_stream = fopen((char *)(config->log_filename + 5), "a")))
{
- log(1, 0, 0, 0, "Disabled throttling.\n");
+ fseek(log_stream, 0, SEEK_END);
+ setbuf(log_stream, NULL);
}
else
{
- log(1, 0, 0, 0, "Enabled throttling (rate is %lu kbits/s)\n", rl_rate);
+ log_stream = stderr;
+ setbuf(log_stream, NULL);
}
- } else if (strcmp(buf, "debug") == 0) {
- debug = atoi(p);
- log(debug, 0, 0, 0, "Set debugging level to %d\n", debug);
- } else if (strcmp(buf, "accounting dir") == 0) {
- accounting_dir = strdup(p);
- log(debug, 0, 0, 0, "Will dump accounting information to %s\n", accounting_dir);
- } else if (strcmp(buf, "dns server") == 0) {
- unsigned long addr = 0;
- if (inet_aton(p, (struct in_addr *)&addr) < 0) {
- printf("Invalid DNS server %s\n", p);
- continue;
- }
- if (default_dns1 == 0)
- default_dns1 = addr;
- else if (default_dns2 == 0)
- default_dns2 = addr;
- } else if (strcmp(buf, "radius server") == 0) {
- struct hostent *h = gethostbyname(p);
- if (h)
- {
- while (*h->h_addr_list)
- {
- ipt ip = ntohl(*(u32 *) * h->h_addr_list);
- if (numradiusservers < MAXRADSERVER)
- radiusserver[numradiusservers++] = ip;
- else
- log(0, 0, 0, 0, "Too many RADIUS IPs\n");
- h->h_addr_list++;
- }
- }
- else
- { // may be IP?
- ipt ip = ntohl(inet_addr(p));
- if (ip && ip != 0xFFFFFFFF)
- {
- if (numradiusservers < MAXRADSERVER)
- radiusserver[numradiusservers++] = ip;
- else
- log(0, 0, 0, 0, "Too many RADIUS IPs\n");
- }
- else
- log(0, 0, 0, 0, "Unknown server %s\n", p);
- }
- } else if (strcmp(buf, "snoop host") == 0) {
- snoop_destination_host = strdup(p);
- } else if (strcmp(buf, "snoop port") == 0) {
- snoop_destination_port = atol(p);
- } else if (strcmp(buf, "bind address") == 0) {
- if (!bind_address)
- {
- // Already overridden on the command line
- bind_address = inet_addr(p);
- handle_interface = 1;
- }
- } else if (strcmp(buf, "dump speed") == 0) {
- dump_speed = atoi(p);
- } else if (strcmp(buf, "setuid") == 0) {
- target_uid = atoi(p);
- } else if (strcmp(buf, "cluster master") == 0) {
- struct hostent *h = gethostbyname(p);
- if (h)
+ }
+ else if (strstr(config->log_filename, "syslog:") == config->log_filename)
+ {
+ char *p = config->log_filename + 7;
+ if (*p)
{
- if (*h->h_addr_list)
- {
- cluster_address = *(u32 *) *h->h_addr_list;
- }
- }
- else
- { // may be IP?
- cluster_address = inet_addr(p);
- }
- } else if (strcmp(buf, "save state") == 0) {
- if (strcasecmp(p, "no") == 0) {
- config_save_state = 0;
- } else {
- config_save_state = 1;
+ openlog("l2tpns", LOG_PID, facility_value(p));
+ syslog_log = 1;
}
- } else if (strcmp(buf, "plugin") == 0) {
- add_plugin(p);
- } else {
- struct param_config cp = { buf, p };
- int rc = run_plugins(PLUGIN_CONFIG, &cp);
- if (rc == 0) log(0, 0, 0, 0, "Unknown config directive \"%s\"\n", buf);
}
}
+ else
+ {
+ log_stream = stderr;
+ setbuf(log_stream, NULL);
+ }
+
- if (snoop_destination_host)
+ // Update radius
+ config->numradiusservers = 0;
+ for (i = 0; i < MAXRADSERVER; i++)
+ if (config->radiusserver[i]) config->numradiusservers++;
+
+ if (!config->numradiusservers)
{
- if (inet_aton(snoop_destination_host, &snoop_addr.sin_addr))
+ log(0, 0, 0, 0, "No RADIUS servers defined!\n");
+ }
+
+ // Update plugins
+ for (i = 0; i < MAXPLUGINS; i++)
+ {
+ if (strcmp(config->plugins[i], config->old_plugins[i]) == 0)
+ continue;
+ if (*config->plugins[i])
{
- snoop_addr.sin_port = htons(snoop_destination_port);
- snoop_addr.sin_family = AF_INET;
+ // Plugin added
+ add_plugin(config->plugins[i]);
}
- else
+ else if (*config->old_plugins[i])
{
- log(0, 0, 0, 0, "Can't find address for snoop host %s\n", snoop_destination_host);
+ // Plugin removed
+ remove_plugin(config->old_plugins[i]);
}
}
+ memcpy(config->old_plugins, config->plugins, sizeof(config->plugins));
+ config->reload_config = 0;
+}
- free(buf);
+void read_config_file()
+{
+ FILE *f;
+
+ if (!config->config_file) return;
+ if (!(f = fopen(config->config_file, "r"))) {
+ fprintf(stderr, "Can't open config file %s: %s\n", config->config_file, strerror(errno));
+ return;
+ }
+
+ log(3, 0, 0, 0, "Reading config file %s\n", config->config_file);
+ cli_do_file(f);
+ log(3, 0, 0, 0, "Done reading config file\n");
fclose(f);
- log(2, 0, 0, 0, "Done reading config file\n");
+ update_config();
+ log_stream = NULL;
}
int sessionsetup(tunnelidt t, sessionidt s, u8 routes)
log(0, session[s].ip, s, t, "VERY VERY BAD! sessionsetup() called with no session[s].ip\n");
return 1;
}
- if (session[s].ip == 0xFFFFFFFE)
- {
- session[s].ip = assign_ip_address(); // Assign one from the pool;
-
- log(2, session[s].ip, s, t, "IP assigned is a magic token. Assign address from pool: %s\n",
- inet_toa(htonl(session[s].ip)));
- }
// Make sure this is right
session[s].tunnel = t;
// zap old sessions with same IP and/or username
- // Don't kill walled_garden sessions - doing so leads to a DoS
+ // Don't kill walled garden sessions - doing so leads to a DoS
// from someone who doesn't need to know the password
ip = session[s].ip;
user = session[s].user;
- for (i = 0; i < MAXSESSION; i++)
+ for (i = 1; i < MAXSESSION; i++)
{
if (i == s) continue;
if (ip == session[i].ip) sessionkill(i, "Duplicate IP address");
run_plugins(PLUGIN_NEW_SESSION, &data);
}
- session[s].sid = ++last_sid;
+ if (!session[s].sid)
+ session[s].sid = ++last_sid;
+
cache_sessionid(htonl(session[s].ip), s);
cluster_send_session(s);
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 ");
- dump_packet(buf, log_stream);
+ if (log_stream)
+ dump_packet(buf, log_stream);
resp = calloc(1400, 1);
l = new_packet(PKT_RESP_ERROR, resp);
free(resp);
}
+/*
+ * HACK
+ * Go through all of the tunnels and do some cleanups
+ */
+void tunnel_clean()
+{
+ int i;
+
+ log(1, 0, 0, 0, "Cleaning tunnels array\n");
+
+ for (i = 1; i < MAXTUNNEL; i++)
+ {
+ if (!tunnel[i].ip
+ || !*tunnel[i].hostname
+ || (tunnel[i].state == TUNNELDIE && tunnel[i].die >= time_now))
+ {
+ tunnelclear(i);
+ }
+ }
+}
+
+void tunnelclear(tunnelidt t)
+{
+ if (!t) return;
+ memset(&tunnel[t], 0, sizeof(tunnel[t]));
+ tunnel[t].state = TUNNELFREE;
+}
+
+tunnelidt new_tunnel()
+{
+ tunnelidt i;
+ for (i = 1; i < MAXTUNNEL; i++)
+ {
+ if (tunnel[i].state == TUNNELFREE)
+ {
+ log(4, 0, 0, i, "Assigning tunnel ID %d\n", i);
+ return i;
+ }
+ }
+ log(0, 0, 0, 0, "Can't find a free tunnel! There shouldn't be this many in use!\n");
+ return 0;
+}
+
projects / l2tpns.git / blobdiff