// L2TP Network Server
// Adrian Kennard 2002
-// Copyright (c) 2003, 2004 Optus Internet Engineering
+// Copyright (c) 2003, 2004, 2005 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 1.60 2004-11-29 02:17:17 bodea Exp $";
+char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.75 2005-01-07 07:18:33 bodea Exp $";
#include <arpa/inet.h>
#include <assert.h>
int snoopfd = -1; // UDP file handle for sending out intercept data
int *radfds = NULL; // RADIUS requests file handles
int ifrfd = -1; // File descriptor for routing, etc
+static int rand_fd = -1; // Random data source
time_t basetime = 0; // base clock
char hostname[1000] = ""; // us.
-static u32 sessionid = 0; // session id for radius accounting
+static uint32_t sessionid = 0; // session id for radius accounting
static int syslog_log = 0; // are we logging to syslog
static FILE *log_stream = NULL; // file handle for direct logging (i.e. direct into file, not via syslog).
extern int cluster_sockfd; // Intra-cluster communications socket.
-u32 last_id = 0; // Last used PPP SID. Can I kill this?? -- mo
+uint32_t last_id = 0; // Last used PPP SID. Can I kill this?? -- mo
struct cli_session_actions *cli_session_actions = NULL; // Pending session changes requested by CLI
struct cli_tunnel_actions *cli_tunnel_actions = NULL; // Pending tunnel changes required by CLI
static void *ip_hash[256]; // Mapping from IP address to session structures.
// Traffic counters.
-static u32 udp_rx = 0, udp_rx_pkt = 0, udp_tx = 0;
-static u32 eth_rx = 0, eth_rx_pkt = 0;
-u32 eth_tx = 0;
+static uint32_t udp_rx = 0, udp_rx_pkt = 0, udp_tx = 0;
+static uint32_t eth_rx = 0, eth_rx_pkt = 0;
+uint32_t eth_tx = 0;
-static u32 ip_pool_size = 1; // Size of the pool of addresses used for dynamic address allocation.
+static uint32_t ip_pool_size = 1; // Size of the pool of addresses used for dynamic address allocation.
time_t time_now = 0; // Current time in seconds since epoch.
static char time_now_string[64] = {0}; // Current time as a string.
static char main_quit = 0; // True if we're in the process of exiting.
CONFIG("debug", debug, INT),
CONFIG("log_file", log_filename, STRING),
CONFIG("pid_file", pid_file, STRING),
+ CONFIG("random_device", random_device, STRING),
CONFIG("l2tp_secret", l2tpsecret, STRING),
- CONFIG("primary_dns", default_dns1, IP),
- CONFIG("secondary_dns", default_dns2, IP),
+ CONFIG("primary_dns", default_dns1, IPv4),
+ CONFIG("secondary_dns", default_dns2, IPv4),
CONFIG("save_state", save_state, BOOL),
- CONFIG("primary_radius", radiusserver[0], IP),
- CONFIG("secondary_radius", radiusserver[1], IP),
+ CONFIG("primary_radius", radiusserver[0], IPv4),
+ CONFIG("secondary_radius", radiusserver[1], IPv4),
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("peer_address", peer_address, IP),
+ CONFIG("radius_authtypes", radius_authtypes_s, STRING),
+ CONFIG("bind_address", bind_address, IPv4),
+ CONFIG("peer_address", peer_address, IPv4),
CONFIG("send_garp", send_garp, BOOL),
CONFIG("throttle_speed", rl_rate, UNSIGNED_LONG),
CONFIG("throttle_buckets", num_tbfs, INT),
CONFIG("scheduler_fifo", scheduler_fifo, BOOL),
CONFIG("lock_pages", lock_pages, BOOL),
CONFIG("icmp_rate", icmp_rate, INT),
- CONFIG("cluster_address", cluster_address, IP),
+ CONFIG("cluster_address", cluster_address, IPv4),
CONFIG("cluster_interface", cluster_interface, STRING),
CONFIG("cluster_hb_interval", cluster_hb_interval, INT),
CONFIG("cluster_hb_timeout", cluster_hb_timeout, INT),
#define max_plugin_functions (sizeof(plugin_functions) / sizeof(char *))
+// Counters for shutdown sessions
+static sessiont shut_acct[8192];
+static sessionidt shut_acct_n = 0;
+
tunnelt *tunnel = NULL; // Array of tunnel structures.
sessiont *session = NULL; // Array of session structures.
sessioncountt *sess_count = NULL; // Array of partial per-session traffic counters.
struct Tringbuffer *ringbuffer = NULL;
#endif
-static void cache_ipmap(ipt ip, int s);
-static void uncache_ipmap(ipt ip);
+static void cache_ipmap(in_addr_t ip, int s);
+static void uncache_ipmap(in_addr_t ip);
static void free_ip_address(sessionidt s);
-static void dump_acct_info(void);
+static void dump_acct_info(int all);
static void sighup_handler(int sig);
static void sigalrm_handler(int sig);
static void sigterm_handler(int sig);
static void sigchild_handler(int sig);
static void read_state(void);
static void dump_state(void);
-static void build_chap_response(char *challenge, u8 id, u16 challenge_length, char **challenge_response);
+static void build_chap_response(char *challenge, uint8_t id, uint16_t challenge_length, char **challenge_response);
static void update_config(void);
static void read_config_file(void);
static void initplugins(void);
static int add_plugin(char *plugin_name);
static int remove_plugin(char *plugin_name);
static void plugins_done(void);
-static void processcontrol(u8 * buf, int len, struct sockaddr_in *addr, int alen);
+static void processcontrol(uint8_t *buf, int len, struct sockaddr_in *addr, int alen);
static tunnelidt new_tunnel(void);
-static int unhide_avp(u8 *avp, tunnelidt t, sessionidt s, u16 length);
+static int unhide_avp(uint8_t *avp, tunnelidt t, sessionidt s, uint16_t length);
// return internal time (10ths since process startup)
static clockt now(void)
// work out a retry time based on try number
// This is a straight bounded exponential backoff.
// Maximum re-try time is 32 seconds. (2^5).
-clockt backoff(u8 try)
+clockt backoff(uint8_t try)
{
if (try > 5) try = 5; // max backoff
return now() + 10 * (1 << try);
void _log(int level, sessionidt s, tunnelidt t, const char *format, ...)
{
static char message[65536] = {0};
- static char message2[65536] = {0};
va_list ap;
#ifdef RINGBUFFER
if (config->debug < level) return;
va_start(ap, format);
+ vsnprintf(message, sizeof(message), format, ap);
+
if (log_stream)
- {
- vsnprintf(message2, 65535, format, ap);
- snprintf(message, 65535, "%s %02d/%02d %s", time_now_string, t, s, message2);
- fprintf(log_stream, "%s", message);
- }
+ fprintf(log_stream, "%s %02d/%02d %s", time_now_string, t, s, message);
else if (syslog_log)
- {
- 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
- }
+ syslog(level + 2, "%02d/%02d %s", t, s, message); // We don't need LOG_EMERG or LOG_ALERT
+
va_end(ap);
}
void _log_hex(int level, const char *title, const char *data, int maxsize)
{
int i, j;
- const u8 *d = (const u8 *)data;
+ const uint8_t *d = (const uint8_t *) data;
if (config->debug < level) return;
}
}
+// initialise the random generator
+static void initrandom(char *source)
+{
+ static char path[sizeof(config->random_device)] = "*undefined*";
+
+ // reinitialise only if we are forced to do so or if the config has changed
+ if (source && !strncmp(path, source, sizeof(path)))
+ return;
+
+ // close previous source, if any
+ if (rand_fd >= 0) close(rand_fd);
+
+ rand_fd = -1;
+
+ if (source)
+ {
+ // register changes
+ snprintf(path, sizeof(path), "%s", source);
+
+ if (*path == '/')
+ {
+ rand_fd = open(path, O_RDONLY|O_NONBLOCK);
+ if (rand_fd < 0)
+ LOG(0, 0, 0, "Error opening the random device %s: %s\n",
+ path, strerror(errno));
+ }
+ }
+
+ // no source: seed prng
+ {
+ unsigned seed = time_now ^ getpid();
+ LOG(4, 0, 0, "Seeding the pseudo random generator: %u\n", seed);
+ srand(seed);
+ }
+}
+
+// fill buffer with random data
+void random_data(uint8_t *buf, int len)
+{
+ int n = 0;
+
+ CSTAT(random_data);
+ if (rand_fd >= 0)
+ {
+ n = read(rand_fd, buf, len);
+ if (n >= len) return;
+ if (n < 0)
+ {
+ if (errno != EAGAIN)
+ {
+ LOG(0, 0, 0, "Error reading from random source: %s\n",
+ strerror(errno));
+
+ // fall back to rand()
+ initrandom(0);
+ }
+
+ n = 0;
+ }
+ }
+
+ // append missing data
+ while (n < len)
+ // not using the low order bits from the prng stream
+ buf[n++] = (rand() >> 4) & 0xff;
+}
// Add a route
//
//
// 'ip' and 'mask' must be in _host_ order.
//
-static void routeset(sessionidt s, ipt ip, ipt mask, ipt gw, u8 add)
+static void routeset(sessionidt s, in_addr_t ip, in_addr_t mask, in_addr_t gw, int add)
{
struct rtentry r;
int i;
memset(&r, 0, sizeof(r));
r.rt_dev = config->tundevice;
r.rt_dst.sa_family = AF_INET;
- *(u32 *) & (((struct sockaddr_in *) &r.rt_dst)->sin_addr.s_addr) = htonl(ip);
+ *(uint32_t *) & (((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);
+ *(uint32_t *) & (((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);
+ *(uint32_t *) & (((struct sockaddr_in *) &r.rt_genmask)->sin_addr.s_addr) = htonl(mask);
r.rt_flags = (RTF_UP | RTF_STATIC);
if (gw)
r.rt_flags |= RTF_GATEWAY;
// IP address.
//
-static int lookup_ipmap(ipt ip)
+static int lookup_ipmap(in_addr_t ip)
{
- u8 *a = (u8 *)&ip;
- char **d = (char **) ip_hash;
- int s;
+ uint8_t *a = (uint8_t *) &ip;
+ uint8_t **d = (uint8_t **) ip_hash;
- if (!(d = (char **) d[(size_t) *a++])) return 0;
- if (!(d = (char **) d[(size_t) *a++])) return 0;
- if (!(d = (char **) d[(size_t) *a++])) return 0;
+ if (!(d = (uint8_t **) d[(size_t) *a++])) return 0;
+ if (!(d = (uint8_t **) d[(size_t) *a++])) return 0;
+ if (!(d = (uint8_t **) d[(size_t) *a++])) return 0;
- s = (ipt) d[(size_t) *a];
- return s;
+ return (int) (intptr_t) d[(size_t) *a];
}
-sessionidt sessionbyip(ipt ip)
+sessionidt sessionbyip(in_addr_t ip)
{
int s = lookup_ipmap(ip);
- CSTAT(call_sessionbyip);
+ CSTAT(sessionbyip);
if (s > 0 && s < MAXSESSION && session[s].tunnel)
- return s;
+ return (sessionidt) s;
+
return 0;
}
//
// (It's actually cached in network order)
//
-static void cache_ipmap(ipt ip, int s)
+static void cache_ipmap(in_addr_t ip, int s)
{
- ipt nip = htonl(ip); // MUST be in network order. I.e. MSB must in be ((char*)(&ip))[0]
- u8 *a = (u8 *) &nip;
- char **d = (char **) ip_hash;
+ in_addr_t nip = htonl(ip); // MUST be in network order. I.e. MSB must in be ((char *) (&ip))[0]
+ uint8_t *a = (uint8_t *) &nip;
+ uint8_t **d = (uint8_t **) ip_hash;
int i;
for (i = 0; i < 3; i++)
{
if (!d[(size_t) a[i]])
{
- if (!(d[(size_t) a[i]] = calloc(256, sizeof (void *))))
+ if (!(d[(size_t) a[i]] = calloc(256, sizeof(void *))))
return;
}
- d = (char **) d[(size_t) a[i]];
+ d = (uint8_t **) d[(size_t) a[i]];
}
- d[(size_t) a[3]] = (char *)((int)s);
+ d[(size_t) a[3]] = (uint8_t *) (intptr_t) s;
if (s > 0)
LOG(4, s, session[s].tunnel, "Caching ip address %s\n", fmtaddr(nip, 0));
// else a map to an ip pool index.
}
-static void uncache_ipmap(ipt ip)
+static void uncache_ipmap(in_addr_t ip)
{
cache_ipmap(ip, 0); // Assign it to the NULL session.
}
{
if (!d[i])
continue;
- e = (char**) d[i];
+ e = (char **) d[i];
for (j = 0; j < 256; ++j)
{
if (!e[j])
continue;
- f = (char**) e[j];
+ f = (char **) e[j];
for (k = 0; k < 256; ++k)
{
if (!f[k])
continue;
- g = (char**)f[k];
+ g = (char **)f[k];
for (l = 0; l < 256; ++l)
{
if (!g[l])
continue;
- cli_print(cli, "%7d %d.%d.%d.%d", (int) g[l], i, j, k, l);
+ cli_print(cli, "%7d %d.%d.%d.%d", (int) (intptr_t) g[l], i, j, k, l);
++count;
}
}
sessionidt sessionbyuser(char *username)
{
int s;
- CSTAT(call_sessionbyuser);
+ CSTAT(sessionbyuser);
for (s = 1; s < MAXSESSION ; ++s)
{
return 0; // Not found.
}
-void send_garp(ipt ip)
+void send_garp(in_addr_t ip)
{
int s;
struct ifreq ifr;
- u8 mac[6];
+ uint8_t mac[6];
s = socket(PF_INET, SOCK_DGRAM, 0);
if (s < 0)
}
// actually send a control message for a specific tunnel
-void tunnelsend(u8 * buf, u16 l, tunnelidt t)
+void tunnelsend(uint8_t * buf, uint16_t l, tunnelidt t)
{
struct sockaddr_in addr;
- CSTAT(call_tunnelsend);
+ CSTAT(tunnelsend);
if (!t)
{
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
- *(u32 *) & addr.sin_addr = htonl(tunnel[t].ip);
+ *(uint32_t *) & addr.sin_addr = htonl(tunnel[t].ip);
addr.sin_port = htons(tunnel[t].port);
// sequence expected, if sequence in message
- if (*buf & 0x08) *(u16 *) (buf + ((*buf & 0x40) ? 10 : 8)) = htons(tunnel[t].nr);
+ if (*buf & 0x08) *(uint16_t *) (buf + ((*buf & 0x40) ? 10 : 8)) = htons(tunnel[t].nr);
// If this is a control message, deal with retries
if (*buf & 0x80)
if (sendto(udpfd, buf, l, 0, (void *) &addr, sizeof(addr)) < 0)
{
- LOG(0, ntohs((*(u16 *) (buf + 6))), t, "Error sending data out tunnel: %s (udpfd=%d, buf=%p, len=%d, dest=%s)\n",
+ LOG(0, ntohs((*(uint16_t *) (buf + 6))), t, "Error sending data out tunnel: %s (udpfd=%d, buf=%p, len=%d, dest=%s)\n",
strerror(errno), udpfd, buf, l, inet_ntoa(addr.sin_addr));
STAT(tunnel_tx_errors);
return;
// Tiny helper function to write data to
// the 'tun' device.
//
-int tun_write(u8 * data, int size)
+int tun_write(uint8_t * data, int size)
{
return write(tunfd, data, size);
}
// process outgoing (to tunnel) IP
//
-static void processipout(u8 * buf, int len)
+static void processipout(uint8_t * buf, int len)
{
sessionidt s;
sessiont *sp;
tunnelidt t;
- ipt ip;
+ in_addr_t ip;
char * data = buf; // Keep a copy of the originals.
int size = len;
- u8 b[MAXETHER + 20];
+ uint8_t b[MAXETHER + 20];
- CSTAT(call_processipout);
+ CSTAT(processipout);
if (len < MIN_IP_SIZE)
{
len -= 4;
// Got an IP header now
- if (*(u8 *)(buf) >> 4 != 4)
+ if (*(uint8_t *)(buf) >> 4 != 4)
{
LOG(1, 0, 0, "IP: Don't understand anything except IPv4\n");
return;
}
- ip = *(u32 *)(buf + 16);
+ ip = *(uint32_t *)(buf + 16);
if (!(s = sessionbyip(ip)))
{
// Is this a packet for a session that doesn't exist?
if (rate++ < config->icmp_rate) // Only send a max of icmp_rate per second.
{
- LOG(4, 0, 0, "IP: Sending ICMP host unreachable to %s\n", fmtaddr(*(u32 *)(buf + 12), 0));
- host_unreachable(*(u32 *)(buf + 12), *(u16 *)(buf + 4), ip, buf, (len < 64) ? 64 : len);
+ LOG(4, 0, 0, "IP: Sending ICMP host unreachable to %s\n", fmtaddr(*(in_addr_t *)(buf + 12), 0));
+ host_unreachable(*(in_addr_t *)(buf + 12), *(uint16_t *)(buf + 4), ip, buf, (len < 64) ? 64 : len);
}
return;
}
// Add on L2TP header
{
- u8 *p = makeppp(b, sizeof(b), buf, len, t, s, PPPIP);
+ uint8_t *p = makeppp(b, sizeof(b), buf, len, t, s, PPPIP);
if (!p) return;
tunnelsend(b, len + (p-b), t); // send it...
}
// Helper routine for the TBF filters.
// Used to send queued data in to the user!
//
-static void send_ipout(sessionidt s, u8 *buf, int len)
+static void send_ipout(sessionidt s, uint8_t *buf, int len)
{
sessiont *sp;
tunnelidt t;
- ipt ip;
+ in_addr_t ip;
- u8 b[MAXETHER + 20];
+ uint8_t b[MAXETHER + 20];
if (len < 0 || len > MAXETHER)
{
buf += 4;
len -= 4;
- ip = *(u32 *)(buf + 16);
+ ip = *(in_addr_t *)(buf + 16);
if (!session[s].ip)
return;
// Add on L2TP header
{
- u8 *p = makeppp(b, sizeof(b), buf, len, t, s, PPPIP);
+ uint8_t *p = makeppp(b, sizeof(b), buf, len, t, s, PPPIP);
if (!p) return;
tunnelsend(b, len + (p-b), t); // send it...
}
}
// add an AVP (16 bit)
-static void control16(controlt * c, u16 avp, u16 val, u8 m)
+static void control16(controlt * c, uint16_t avp, uint16_t val, uint8_t m)
{
- u16 l = (m ? 0x8008 : 0x0008);
- *(u16 *) (c->buf + c->length + 0) = htons(l);
- *(u16 *) (c->buf + c->length + 2) = htons(0);
- *(u16 *) (c->buf + c->length + 4) = htons(avp);
- *(u16 *) (c->buf + c->length + 6) = htons(val);
+ uint16_t l = (m ? 0x8008 : 0x0008);
+ *(uint16_t *) (c->buf + c->length + 0) = htons(l);
+ *(uint16_t *) (c->buf + c->length + 2) = htons(0);
+ *(uint16_t *) (c->buf + c->length + 4) = htons(avp);
+ *(uint16_t *) (c->buf + c->length + 6) = htons(val);
c->length += 8;
}
// add an AVP (32 bit)
-static void control32(controlt * c, u16 avp, u32 val, u8 m)
+static void control32(controlt * c, uint16_t avp, uint32_t val, uint8_t m)
{
- u16 l = (m ? 0x800A : 0x000A);
- *(u16 *) (c->buf + c->length + 0) = htons(l);
- *(u16 *) (c->buf + c->length + 2) = htons(0);
- *(u16 *) (c->buf + c->length + 4) = htons(avp);
- *(u32 *) (c->buf + c->length + 6) = htonl(val);
+ uint16_t l = (m ? 0x800A : 0x000A);
+ *(uint16_t *) (c->buf + c->length + 0) = htons(l);
+ *(uint16_t *) (c->buf + c->length + 2) = htons(0);
+ *(uint16_t *) (c->buf + c->length + 4) = htons(avp);
+ *(uint32_t *) (c->buf + c->length + 6) = htonl(val);
c->length += 10;
}
// add an AVP (32 bit)
-static void controls(controlt * c, u16 avp, char *val, u8 m)
+static void controls(controlt * c, uint16_t avp, char *val, uint8_t m)
{
- u16 l = ((m ? 0x8000 : 0) + strlen(val) + 6);
- *(u16 *) (c->buf + c->length + 0) = htons(l);
- *(u16 *) (c->buf + c->length + 2) = htons(0);
- *(u16 *) (c->buf + c->length + 4) = htons(avp);
+ uint16_t l = ((m ? 0x8000 : 0) + strlen(val) + 6);
+ *(uint16_t *) (c->buf + c->length + 0) = htons(l);
+ *(uint16_t *) (c->buf + c->length + 2) = htons(0);
+ *(uint16_t *) (c->buf + c->length + 4) = htons(avp);
memcpy(c->buf + c->length + 6, val, strlen(val));
c->length += 6 + strlen(val);
}
// add a binary AVP
-static void controlb(controlt * c, u16 avp, char *val, unsigned int len, u8 m)
+static void controlb(controlt * c, uint16_t avp, char *val, unsigned int len, uint8_t m)
{
- u16 l = ((m ? 0x8000 : 0) + len + 6);
- *(u16 *) (c->buf + c->length + 0) = htons(l);
- *(u16 *) (c->buf + c->length + 2) = htons(0);
- *(u16 *) (c->buf + c->length + 4) = htons(avp);
+ uint16_t l = ((m ? 0x8000 : 0) + len + 6);
+ *(uint16_t *) (c->buf + c->length + 0) = htons(l);
+ *(uint16_t *) (c->buf + c->length + 2) = htons(0);
+ *(uint16_t *) (c->buf + c->length + 4) = htons(avp);
memcpy(c->buf + c->length + 6, val, len);
c->length += 6 + len;
}
// new control connection
-static controlt *controlnew(u16 mtype)
+static controlt *controlnew(uint16_t mtype)
{
controlt *c;
if (!controlfree)
}
assert(c);
c->next = 0;
- *(u16 *) (c->buf + 0) = htons(0xC802); // flags/ver
+ *(uint16_t *) (c->buf + 0) = htons(0xC802); // flags/ver
c->length = 12;
control16(c, 0, mtype, 1);
return c;
// (ZLB send).
static void controlnull(tunnelidt t)
{
- u8 buf[12];
+ uint8_t buf[12];
if (tunnel[t].controlc) // Messages queued; They will carry the ack.
return;
- *(u16 *) (buf + 0) = htons(0xC802); // flags/ver
- *(u16 *) (buf + 2) = htons(12); // length
- *(u16 *) (buf + 4) = htons(tunnel[t].far); // tunnel
- *(u16 *) (buf + 6) = htons(0); // session
- *(u16 *) (buf + 8) = htons(tunnel[t].ns); // sequence
- *(u16 *) (buf + 10) = htons(tunnel[t].nr); // sequence
+ *(uint16_t *) (buf + 0) = htons(0xC802); // flags/ver
+ *(uint16_t *) (buf + 2) = htons(12); // length
+ *(uint16_t *) (buf + 4) = htons(tunnel[t].far); // tunnel
+ *(uint16_t *) (buf + 6) = htons(0); // session
+ *(uint16_t *) (buf + 8) = htons(tunnel[t].ns); // sequence
+ *(uint16_t *) (buf + 10) = htons(tunnel[t].nr); // sequence
tunnelsend(buf, 12, t);
}
// add a control message to a tunnel, and send if within window
static void controladd(controlt * c, tunnelidt t, sessionidt s)
{
- *(u16 *) (c->buf + 2) = htons(c->length); // length
- *(u16 *) (c->buf + 4) = htons(tunnel[t].far); // tunnel
- *(u16 *) (c->buf + 6) = htons(s ? session[s].far : 0); // session
- *(u16 *) (c->buf + 8) = htons(tunnel[t].ns); // sequence
+ *(uint16_t *) (c->buf + 2) = htons(c->length); // length
+ *(uint16_t *) (c->buf + 4) = htons(tunnel[t].far); // tunnel
+ *(uint16_t *) (c->buf + 6) = htons(s ? session[s].far : 0); // session
+ *(uint16_t *) (c->buf + 8) = htons(tunnel[t].ns); // sequence
tunnel[t].ns++; // advance sequence
// link in message in to queue
if (tunnel[t].controlc)
int walled_garden = session[s].walled_garden;
- CSTAT(call_sessionshutdown);
+ CSTAT(sessionshutdown);
if (!session[s].tunnel)
{
run_plugins(PLUGIN_KILL_SESSION, &data);
}
- // RADIUS Stop message
if (session[s].opened && !walled_garden && !session[s].die)
{
- u16 r = session[s].radius;
+ // RADIUS Stop message
+ uint16_t r = session[s].radius;
if (!r)
{
if (!(r = radiusnew(s)))
}
else
{
- int n;
- for (n = 0; n < 15; n++)
- radius[r].auth[n] = rand();
+ random_data(radius[r].auth, sizeof(radius[r].auth));
}
}
+
if (r && radius[r].state != RADIUSSTOP)
radiussend(r, RADIUSSTOP); // stop, if not already trying
+
+ // Save counters to dump to accounting file
+ if (*config->accounting_dir && shut_acct_n < sizeof(shut_acct) / sizeof(*shut_acct))
+ memcpy(&shut_acct[shut_acct_n++], &session[s], sizeof(session[s]));
}
if (session[s].ip)
void sendipcp(tunnelidt t, sessionidt s)
{
- u8 buf[MAXCONTROL];
- u16 r = session[s].radius;
- u8 *q;
+ uint8_t buf[MAXCONTROL];
+ uint16_t r = session[s].radius;
+ uint8_t *q;
- CSTAT(call_sendipcp);
+ CSTAT(sendipcp);
if (!r)
r = radiusnew(s);
*q = ConfigReq;
q[1] = r << RADIUS_SHIFT; // ID, dont care, we only send one type of request
- *(u16 *) (q + 2) = htons(10);
+ *(uint16_t *) (q + 2) = htons(10);
q[4] = 3;
q[5] = 6;
- *(u32 *) (q + 6) = config->peer_address ? config->peer_address :
- config->bind_address ? config->bind_address :
- my_address; // send my IP
+ *(in_addr_t *) (q + 6) = config->peer_address ? config->peer_address :
+ config->bind_address ? config->bind_address :
+ my_address; // send my IP
tunnelsend(buf, 10 + (q - buf), t); // send it
session[s].flags &= ~SF_IPCP_ACKED; // Clear flag.
static void sessionkill(sessionidt s, char *reason)
{
- CSTAT(call_sessionkill);
+ CSTAT(sessionkill);
session[s].die = now();
sessionshutdown(s, reason); // close radius/routes, etc.
sessionidt s;
controlt *c;
- CSTAT(call_tunnelkill);
+ CSTAT(tunnelkill);
tunnel[t].state = TUNNELDIE;
{
sessionidt s;
- CSTAT(call_tunnelshutdown);
+ CSTAT(tunnelshutdown);
if (!tunnel[t].last || !tunnel[t].far || tunnel[t].state == TUNNELFREE)
{
// TBA - should we wait for sessions to stop?
{ // Send StopCCN
controlt *c = controlnew(4); // sending StopCCN
- control16(c, 1, 1, 1); // result code (admin reasons - TBA make error, general error, add message
+ control16(c, 1, 1, 1); // result code (admin reasons - TBA make error, general error, add message)
control16(c, 9, t, 1); // assigned tunnel (our end)
controladd(c, t, 0); // send the message
}
}
// read and process packet on tunnel (UDP)
-void processudp(u8 * buf, int len, struct sockaddr_in *addr)
+void processudp(uint8_t * buf, int len, struct sockaddr_in *addr)
{
char *chapresponse = NULL;
- u16 l = len, t = 0, s = 0, ns = 0, nr = 0;
- u8 *p = buf + 2;
+ uint16_t l = len, t = 0, s = 0, ns = 0, nr = 0;
+ uint8_t *p = buf + 2;
- CSTAT(call_processudp);
+ CSTAT(processudp);
udp_rx += len;
udp_rx_pkt++;
}
if (*buf & 0x40)
{ // length
- l = ntohs(*(u16 *) p);
+ l = ntohs(*(uint16_t *) p);
p += 2;
}
- t = ntohs(*(u16 *) p);
+ t = ntohs(*(uint16_t *) p);
p += 2;
- s = ntohs(*(u16 *) p);
+ s = ntohs(*(uint16_t *) p);
p += 2;
if (s >= MAXSESSION)
{
}
if (*buf & 0x08)
{ // ns/nr
- ns = ntohs(*(u16 *) p);
+ ns = ntohs(*(uint16_t *) p);
p += 2;
- nr = ntohs(*(u16 *) p);
+ nr = ntohs(*(uint16_t *) p);
p += 2;
}
if (*buf & 0x02)
{ // offset
- u16 o = ntohs(*(u16 *) p);
+ uint16_t o = ntohs(*(uint16_t *) p);
p += o + 2;
}
if ((p - buf) > l)
{
- LOG(1, s, t, "Bad length %d>%d\n", (p - buf), l);
+ LOG(1, s, t, "Bad length %d>%d\n", (int) (p - buf), l);
STAT(tunnel_rx_errors);
return;
}
l -= (p - buf);
if (*buf & 0x80)
{ // control
- u16 message = 0xFFFF; // message type
- u8 fatal = 0;
- u8 mandatorymessage = 0;
- u8 chap = 0; // if CHAP being used
- u16 asession = 0; // assigned session
- u32 amagic = 0; // magic number
- u8 aflags = 0; // flags from last LCF
- u16 version = 0x0100; // protocol version (we handle 0.0 as well and send that back just in case)
- int requestchap = 0; // do we request PAP instead of original CHAP request?
- char called[MAXTEL] = ""; // called number
- char calling[MAXTEL] = ""; // calling number
+ uint16_t message = 0xFFFF; // message type
+ uint8_t fatal = 0;
+ uint8_t mandatorymessage = 0;
+ uint8_t chap = 0; // if CHAP being used
+ uint16_t asession = 0; // assigned session
+ uint32_t amagic = 0; // magic number
+ uint8_t aflags = 0; // flags from last LCF
+ uint16_t version = 0x0100; // protocol version (we handle 0.0 as well and send that back just in case)
+ int requestchap = 0; // do we request PAP instead of original CHAP request?
+ char called[MAXTEL] = ""; // called number
+ char calling[MAXTEL] = ""; // calling number
if (!config->cluster_iam_master)
{
for (i = 1; i <= config->cluster_highest_tunnelid ; ++i)
{
if (tunnel[i].state != TUNNELOPENING ||
- tunnel[i].ip != ntohl(*(ipt *) & addr->sin_addr) ||
+ tunnel[i].ip != ntohl(*(in_addr_t *) & addr->sin_addr) ||
tunnel[i].port != ntohs(addr->sin_port) )
continue;
t = i;
return;
}
tunnelclear(t);
- tunnel[t].ip = ntohl(*(ipt *) & addr->sin_addr);
+ tunnel[t].ip = ntohl(*(in_addr_t *) & addr->sin_addr);
tunnel[t].port = ntohs(addr->sin_port);
tunnel[t].window = 4; // default window
STAT(tunnel_created);
// process AVPs
while (l && !(fatal & 0x80))
{
- u16 n = (ntohs(*(u16 *) p) & 0x3FF);
- u8 *b = p;
- u8 flags = *p;
- u16 mtype;
+ uint16_t n = (ntohs(*(uint16_t *) p) & 0x3FF);
+ uint8_t *b = p;
+ uint8_t flags = *p;
+ uint16_t mtype;
p += n; // next
if (l < n)
{
continue; // next
}
b += 2;
- if (*(u16 *) (b))
+ if (*(uint16_t *) (b))
{
- LOG(2, s, t, "Unknown AVP vendor %d\n", ntohs(*(u16 *) (b)));
+ LOG(2, s, t, "Unknown AVP vendor %d\n", ntohs(*(uint16_t *) (b)));
fatal = flags;
continue; // next
}
b += 2;
- mtype = ntohs(*(u16 *) (b));
+ mtype = ntohs(*(uint16_t *) (b));
b += 2;
n -= 6;
- LOG(4, s, t, " AVP %d (%s) len %d\n", mtype, avpnames[mtype], n);
+ LOG(4, s, t, " AVP %d (%s) len %d\n", mtype, avp_name(mtype), n);
switch (mtype)
{
case 0: // message type
- message = ntohs(*(u16 *) b);
- LOG(4, s, t, " Message type = %d (%s)\n", *b, l2tp_message_types[message]);
+ message = ntohs(*(uint16_t *) b);
+ LOG(4, s, t, " Message type = %d (%s)\n", *b, l2tp_message_type(message));
mandatorymessage = flags;
break;
case 1: // result code
{
- u16 rescode = ntohs(*(u16 *)(b));
+ uint16_t rescode = ntohs(*(uint16_t *) b);
const char* resdesc = "(unknown)";
if (message == 4)
{ /* StopCCN */
- if (rescode <= MAX_STOPCCN_RESULT_CODE)
- resdesc = stopccn_result_codes[rescode];
+ resdesc = stopccn_result_code(rescode);
}
else if (message == 14)
{ /* CDN */
- if (rescode <= MAX_CDN_RESULT_CODE)
- resdesc = cdn_result_codes[rescode];
+ resdesc = cdn_result_code(rescode);
}
LOG(4, s, t, " Result Code %d: %s\n", rescode, resdesc);
if (n >= 4)
{
- u16 errcode = ntohs(*(u16 *)(b + 2));
- const char* errdesc = "(unknown)";
- if (errcode <= MAX_ERROR_CODE)
- errdesc = error_codes[errcode];
- LOG(4, s, t, " Error Code %d: %s\n", errcode, errdesc);
+ uint16_t errcode = ntohs(*(uint16_t *)(b + 2));
+ LOG(4, s, t, " Error Code %d: %s\n", errcode, error_code(errcode));
}
if (n > 4)
LOG(4, s, t, " Error String: %.*s\n", n-4, b+4);
break;
case 2: // protocol version
{
- version = ntohs(*(u16 *) (b));
+ version = ntohs(*(uint16_t *) (b));
LOG(4, s, t, " Protocol version = %d\n", version);
if (version && version != 0x0100)
{ // allow 0.0 and 1.0
LOG(4, s, t, " Vendor name = \"%s\"\n", tunnel[t].vendor);
break;
case 9: // assigned tunnel
- tunnel[t].far = ntohs(*(u16 *) (b));
+ tunnel[t].far = ntohs(*(uint16_t *) (b));
LOG(4, s, t, " Remote tunnel id = %d\n", tunnel[t].far);
break;
case 10: // rx window
- tunnel[t].window = ntohs(*(u16 *) (b));
+ tunnel[t].window = ntohs(*(uint16_t *) (b));
if (!tunnel[t].window)
tunnel[t].window = 1; // window of 0 is silly
LOG(4, s, t, " rx window = %d\n", tunnel[t].window);
break;
case 14: // assigned session
- asession = session[s].far = ntohs(*(u16 *) (b));
+ asession = session[s].far = ntohs(*(uint16_t *) (b));
LOG(4, s, t, " assigned session = %d\n", asession);
break;
case 15: // call serial number
- LOG(4, s, t, " call serial number = %d\n", ntohl(*(u32 *)b));
+ LOG(4, s, t, " call serial number = %d\n", ntohl(*(uint32_t *)b));
break;
case 18: // bearer type
- LOG(4, s, t, " bearer type = %d\n", ntohl(*(u32 *)b));
+ LOG(4, s, t, " bearer type = %d\n", ntohl(*(uint32_t *)b));
// TBA - for RADIUS
break;
case 19: // framing type
- LOG(4, s, t, " framing type = %d\n", ntohl(*(u32 *)b));
+ LOG(4, s, t, " framing type = %d\n", ntohl(*(uint32_t *)b));
// TBA
break;
case 21: // called number
case 24: // tx connect speed
if (n == 4)
{
- session[s].tx_connect_speed = ntohl(*(u32 *)b);
+ session[s].tx_connect_speed = ntohl(*(uint32_t *)b);
}
else
{
case 38: // rx connect speed
if (n == 4)
{
- session[s].rx_connect_speed = ntohl(*(u32 *)b);
+ session[s].rx_connect_speed = ntohl(*(uint32_t *)b);
}
else
{
break;
case 25: // Physical Channel ID
{
- u32 tmp = ntohl(*(u32 *)b);
+ uint32_t tmp = ntohl(*(uint32_t *) b);
LOG(4, s, t, " Physical Channel ID <%X>\n", tmp);
break;
}
case 29: // Proxy Authentication Type
{
- u16 authtype = ntohs(*(u16 *)b);
- LOG(4, s, t, " Proxy Auth Type %d (%s)\n", authtype, authtypes[authtype]);
- requestchap = (authtype == 2);
+ uint16_t atype = ntohs(*(uint16_t *)b);
+ LOG(4, s, t, " Proxy Auth Type %d (%s)\n", atype, auth_type(atype));
+ requestchap = (atype == 2);
break;
}
case 30: // Proxy Authentication Name
}
case 32: // Proxy Authentication ID
{
- u16 authid = ntohs(*(u16 *)(b));
+ uint16_t authid = ntohs(*(uint16_t *)(b));
LOG(4, s, t, " Proxy Auth ID (%d)\n", authid);
if (session[s].radius)
radius[session[s].radius].id = authid;
}
case 27: // last send lcp
{ // find magic number
- u8 *p = b, *e = p + n;
+ uint8_t *p = b, *e = p + n;
while (p + 1 < e && p[1] && p + p[1] <= e)
{
if (*p == 5 && p[1] == 6) // Magic-Number
- amagic = ntohl(*(u32 *) (p + 2));
- else if (*p == 3 && p[1] == 5 && *(u16 *) (p + 2) == htons(PPPCHAP) && p[4] == 5) // Authentication-Protocol
+ amagic = ntohl(*(uint32_t *) (p + 2));
+ else if (*p == 3 && p[1] == 5 && *(uint16_t *) (p + 2) == htons(PPPCHAP) && p[4] == 5) // Authentication-Protocol
chap = 1;
else if (*p == 7) // Protocol-Field-Compression
aflags |= SESSIONPFC;
case 39: // seq required - we control it as an LNS anyway...
break;
case 36: // Random Vector
- LOG(4, s, t, " Random Vector received. Enabled AVP Hiding.\n");
+ LOG(4, s, t, " Random Vector received. Enabled AVP Hiding.\n");
memset(session[s].random_vector, 0, sizeof(session[s].random_vector));
memcpy(session[s].random_vector, b, n);
session[s].random_vector_length = n;
}
else
{
- u16 r;
+ uint16_t r;
controlt *c;
s = sessionfree;
LOG(3, s, t, "New session (%d/%d)\n", tunnel[t].far, session[s].far);
control16(c, 14, s, 1); // assigned session
controladd(c, t, s); // send the reply
- {
- // Generate a random challenge
- int n;
- for (n = 0; n < 15; n++)
- radius[r].auth[n] = rand();
- }
+
+ // Generate a random challenge
+ random_data(radius[r].auth, sizeof(radius[r].auth));
strncpy(radius[r].calling, calling, sizeof(radius[r].calling) - 1);
strncpy(session[s].called, called, sizeof(session[s].called) - 1);
strncpy(session[s].calling, calling, sizeof(session[s].calling) - 1);
}
else
{ // data
- u16 prot;
+ uint16_t prot;
LOG_HEX(5, "Receive Tunnel Data", p, l);
if (l > 2 && p[0] == 0xFF && p[1] == 0x03)
}
else
{
- prot = ntohs(*(u16 *) p);
+ prot = ntohs(*(uint16_t *) p);
p += 2;
l -= 2;
}
return;
}
- if (session[s].die)
- {
- LOG(3, s, t, "Session %d is closing. Don't process PPP packets\n", s);
-// I'm pretty sure this isn't right -- mo.
-// return; // closing session, PPP not processed
- }
if (prot == PPPPAP)
{
session[s].last_packet = time_now;
}
else if (prot == PPPIP)
{
+ if (session[s].die)
+ {
+ LOG(4, s, t, "Session %d is closing. Don't process PPP packets\n", s);
+ return; // closing session, PPP not processed
+ }
+
session[s].last_packet = time_now;
if (session[s].walled_garden && !config->cluster_iam_master)
{
master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port);
return;
}
+
processipin(t, s, p, l);
}
else
}
// read and process packet on tun
-static void processtun(u8 * buf, int len)
+static void processtun(uint8_t * buf, int len)
{
LOG_HEX(5, "Receive TUN Data", buf, len);
STAT(tun_rx_packets);
INC_STAT(tun_rx_bytes, len);
- CSTAT(call_processtun);
+ CSTAT(processtun);
eth_rx_pkt++;
eth_rx += len;
return;
}
- if (*(u16 *) (buf + 2) == htons(PKTIP)) // IP
+ if (*(uint16_t *) (buf + 2) == htons(PKTIP)) // IPv4
processipout(buf, len);
// Else discard.
}
static sessionidt s = 0; // Next session to check for actions on.
tunnelidt t;
int count=0,i;
- u16 r;
+ uint16_t r;
static clockt next_acct = 0;
+ static clockt next_shut_acct = 0;
int a;
LOG(3, 0, 0, "Begin regular cleanup\n");
if (tunnel[t].retry <= TIME)
{
controlt *c = tunnel[t].controls;
- u8 w = tunnel[t].window;
+ uint8_t w = tunnel[t].window;
tunnel[t].try++; // another try
if (tunnel[t].try > 5)
tunnelkill(t, "Timeout on control message"); // game over
// Drop sessions who have not responded within IDLE_TIMEOUT seconds
if (session[s].last_packet && (time_now - session[s].last_packet >= IDLE_TIMEOUT))
{
- sessionkill(s, "No response to LCP ECHO requests");
+ sessionshutdown(s, "No response to LCP ECHO requests");
STAT(session_timeout);
if (++count >= MAX_ACTIONS) break;
continue;
// No data in IDLE_TIMEOUT seconds, send LCP ECHO
if (session[s].user[0] && (time_now - session[s].last_packet >= ECHO_TIMEOUT))
{
- u8 b[MAXCONTROL] = {0};
+ uint8_t b[MAXCONTROL] = {0};
- u8 *q = makeppp(b, sizeof(b), 0, 0, session[s].tunnel, s, PPPLCP);
+ uint8_t *q = makeppp(b, sizeof(b), 0, 0, session[s].tunnel, s, PPPLCP);
if (!q) continue;
*q = EchoReq;
- *(u8 *)(q + 1) = (time_now % 255); // ID
- *(u16 *)(q + 2) = htons(8); // Length
- *(u32 *)(q + 4) = 0; // Magic Number (not supported)
+ *(uint8_t *)(q + 1) = (time_now % 255); // ID
+ *(uint16_t *)(q + 2) = htons(8); // Length
+ *(uint32_t *)(q + 4) = 0; // Magic Number (not supported)
LOG(4, s, session[s].tunnel, "No data in %d seconds, sending LCP ECHO\n",
(int)(time_now - session[s].last_packet));
}
}
- if (*config->accounting_dir && next_acct <= TIME)
+ if (*config->accounting_dir)
{
- // Dump accounting data
- next_acct = TIME + ACCT_TIME;
- dump_acct_info();
+ if (next_acct <= TIME)
+ {
+ // Dump accounting data
+ next_acct = TIME + ACCT_TIME;
+ next_shut_acct = TIME + ACCT_SHUT_TIME;
+ dump_acct_info(1);
+ }
+ else if (next_shut_acct <= TIME)
+ {
+ // Dump accounting data for shutdown sessions
+ next_shut_acct = TIME + ACCT_SHUT_TIME;
+ if (shut_acct_n)
+ dump_acct_info(0);
+ }
}
if (count >= MAX_ACTIONS)
// 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, "Giving up waiting for RADIUS to be empty. Shutting down anyway.\n");
+ LOG(1, 0, 0, "Giving up waiting for RADIUS to be empty. Shutting down anyway.\n");
return 0;
}
static void mainloop(void)
{
int i;
- u8 buf[65536];
+ uint8_t buf[65536];
struct timeval to;
clockt next_cluster_ping = 0; // send initial ping immediately
time_t next_clean = time_now + config->cleanup_interval;
- LOG(4, 0, 0, "Beginning of main loop. udpfd=%d, tunfd=%d, cluster_sockfd=%d, controlfd=%d\n",
+ LOG(4, 0, 0, "Beginning of main loop. udpfd=%d, tunfd=%d, cluster_sockfd=%d, controlfd=%d\n",
udpfd, tunfd, cluster_sockfd, controlfd);
FD_ZERO(&readset);
n = select(n + 1, &r, 0, 0, &to);
#endif /* BGP */
+ STAT(select_called);
+
TIME = now();
if (n < 0)
{
else if (n)
{
struct sockaddr_in addr;
- int alen = sizeof(addr);
- if (FD_ISSET(udpfd, &r))
- {
- int c, n;
- for (c = 0; c < config->multi_read_count; c++)
- {
- if ((n = recvfrom(udpfd, buf, sizeof(buf), 0, (void *) &addr, &alen)) > 0)
- processudp(buf, n, &addr);
- else
- break;
- }
- }
- if (FD_ISSET(tunfd, &r))
+ int alen, c, s;
+ int udp_pkts = 0;
+ int tun_pkts = 0;
+ int cluster_pkts = 0;
+
+ // nsctl commands
+ if (FD_ISSET(controlfd, &r))
{
- int c, n;
- for (c = 0; c < config->multi_read_count; c++)
- {
- if ((n = read(tunfd, buf, sizeof(buf))) > 0)
- processtun(buf, n);
- else
- break;
- }
+ alen = sizeof(addr);
+ processcontrol(buf, recvfrom(controlfd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen), &addr, alen);
+ n--;
}
+ // RADIUS responses
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);
+ n--;
+ }
+ }
+ }
- if (FD_ISSET(cluster_sockfd, &r))
+ // CLI connections
+ if (FD_ISSET(clifd, &r))
{
- int size;
- size = recvfrom(cluster_sockfd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen);
- processcluster(buf, size, addr.sin_addr.s_addr);
+ int cli;
+
+ alen = sizeof(addr);
+ if ((cli = accept(clifd, (struct sockaddr *)&addr, &alen)) >= 0)
+ {
+ cli_do(cli);
+ close(cli);
+ }
+ else
+ LOG(0, 0, 0, "accept error: %s\n", strerror(errno));
+
+ n--;
}
- if (FD_ISSET(controlfd, &r))
- processcontrol(buf, recvfrom(controlfd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen), &addr, alen);
+#ifdef BGP
+ for (i = 0; i < BGP_NUM_PEERS; i++)
+ {
+ int isr = bgp_set[i] ? FD_ISSET(bgp_peers[i].sock, &r) : 0;
+ int isw = bgp_set[i] ? FD_ISSET(bgp_peers[i].sock, &w) : 0;
+ bgp_process(&bgp_peers[i], isr, isw);
+ if (isr) n--;
+ if (isw) n--;
+ }
+#endif /* BGP */
- if (FD_ISSET(clifd, &r))
+ for (c = 0; n && c < config->multi_read_count; c++)
{
- struct sockaddr_in addr;
- int sockfd;
- int len = sizeof(addr);
+ // L2TP
+ if (FD_ISSET(udpfd, &r))
+ {
+ alen = sizeof(addr);
+ if ((s = recvfrom(udpfd, buf, sizeof(buf), 0, (void *) &addr, &alen)) > 0)
+ {
+ processudp(buf, s, &addr);
+ udp_pkts++;
+ }
+ else
+ {
+ FD_CLR(udpfd, &r);
+ n--;
+ }
+ }
- if ((sockfd = accept(clifd, (struct sockaddr *)&addr, &len)) <= 0)
+ // incoming IP
+ if (FD_ISSET(tunfd, &r))
{
- LOG(0, 0, 0, "accept error: %s\n", strerror(errno));
- continue;
+ if ((s = read(tunfd, buf, sizeof(buf))) > 0)
+ {
+ processtun(buf, s);
+ tun_pkts++;
+ }
+ else
+ {
+ FD_CLR(tunfd, &r);
+ n--;
+ }
}
- else
+
+ // cluster
+ if (FD_ISSET(cluster_sockfd, &r))
{
- cli_do(sockfd);
- close(sockfd);
+ alen = sizeof(addr);
+ if ((s = recvfrom(cluster_sockfd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen)) > 0)
+ {
+ processcluster(buf, s, addr.sin_addr.s_addr);
+ cluster_pkts++;
+ }
+ else
+ {
+ FD_CLR(cluster_sockfd, &r);
+ n--;
+ }
}
}
+
+ if (udp_pkts > 1 || tun_pkts > 1 || cluster_pkts > 1)
+ STAT(multi_read_used);
+
+ if (c >= config->multi_read_count)
+ {
+ LOG(3, 0, 0, "Reached multi_read_count (%d); processed %d udp, %d tun and %d cluster packets\n",
+ config->multi_read_count, udp_pkts, tun_pkts, cluster_pkts);
+
+ STAT(multi_read_exceeded);
+ }
}
// Runs on every machine (master and slaves).
next_clean = time_now + config->cleanup_interval; // Did. Move to next interval.
}
}
-
-#ifdef BGP
- for (i = 0; i < BGP_NUM_PEERS; i++)
- {
- bgp_process(&bgp_peers[i],
- bgp_set[i] ? FD_ISSET(bgp_peers[i].sock, &r) : 0,
- bgp_set[i] ? FD_ISSET(bgp_peers[i].sock, &w) : 0);
- }
-#endif /* BGP */
}
// Are we the master and shutting down??
config->debug = optdebug;
config->num_tbfs = MAXTBFS;
config->rl_rate = 28; // 28kbps
+ strcpy(config->random_device, RANDOMDEVICE);
if (!(tunnel = shared_malloc(sizeof(tunnelt) * MAXTUNNEL)))
{
exit(1);
}
-if (!(ip_filters = shared_malloc(sizeof(ip_filtert) * MAXFILTER)))
-{
- LOG(0, 0, 0, "Error doing malloc for ip_filters: %s\n", strerror(errno));
- exit(1);
-}
-memset(ip_filters, 0, sizeof(ip_filtert) * MAXFILTER);
+ if (!(ip_filters = shared_malloc(sizeof(ip_filtert) * MAXFILTER)))
+ {
+ LOG(0, 0, 0, "Error doing malloc for ip_filters: %s\n", strerror(errno));
+ exit(1);
+ }
+ memset(ip_filters, 0, sizeof(ip_filtert) * MAXFILTER);
#ifdef RINGBUFFER
if (!(ringbuffer = shared_malloc(sizeof(struct Tringbuffer))))
static int assign_ip_address(sessionidt s)
{
- u32 i;
+ uint32_t i;
int best = -1;
time_t best_time = time_now;
char *u = session[s].user;
char reuse = 0;
- CSTAT(call_assign_ip_address);
+ CSTAT(assign_ip_address);
for (i = 1; i < ip_pool_size; i++)
{
int i = session[s].ip_pool_index;
- CSTAT(call_free_ip_address);
+ CSTAT(free_ip_address);
if (!session[s].ip)
return; // what the?
//
// Add a block of addresses to the IP pool to hand out.
//
-static void add_to_ip_pool(u32 addr, u32 mask)
+static void add_to_ip_pool(in_addr_t addr, in_addr_t mask)
{
int i;
if (mask == 0)
if ((p = (char *)strrchr(buf, '\n'))) *p = 0;
if ((p = (char *)strchr(buf, ':')))
{
- ipt src;
+ in_addr_t src;
*p = '\0';
src = inet_addr(buf);
if (src == INADDR_NONE)
{
// It's a range
int numbits = 0;
- u32 start = 0, mask = 0;
+ in_addr_t start = 0, mask = 0;
LOG(2, 0, 0, "Adding IP address range %s\n", buf);
*p++ = 0;
continue;
}
start = ntohl(inet_addr(pool));
- mask = (u32)(pow(2, numbits) - 1) << (32 - numbits);
+ mask = (in_addr_t) (pow(2, numbits) - 1) << (32 - numbits);
// Add a static route for this pool
LOG(5, 0, 0, "Adding route for address pool %s/%u\n",
LOG(1, 0, 0, "IP address pool is %d addresses\n", ip_pool_size - 1);
}
-void snoop_send_packet(char *packet, u16 size, ipt destination, u16 port)
+void snoop_send_packet(char *packet, uint16_t size, in_addr_t destination, uint16_t port)
{
struct sockaddr_in snoop_addr = {0};
if (!destination || !port || snoopfd <= 0 || size <= 0 || !packet)
snoop_addr.sin_addr.s_addr = destination;
snoop_addr.sin_port = ntohs(port);
- LOG(5, 0, 0, "Snooping packet at %p (%d bytes) to %s:%d\n",
- packet, size, fmtaddr(snoop_addr.sin_addr.s_addr, 0),
+ LOG(5, 0, 0, "Snooping %d byte packet to %s:%d\n", size,
+ fmtaddr(snoop_addr.sin_addr.s_addr, 0),
htons(snoop_addr.sin_port));
if (sendto(snoopfd, packet, size, MSG_DONTWAIT | MSG_NOSIGNAL, (void *) &snoop_addr, sizeof(snoop_addr)) < 0)
STAT(packets_snooped);
}
-static void dump_acct_info()
+static int dump_session(FILE **f, sessiont *s)
{
- char filename[1024];
- char timestr[64];
- time_t t = time(NULL);
- int i;
- FILE *f = NULL;
-
+ if (!s->opened || !s->ip || !(s->cin || s->cout) || !*s->user || s->walled_garden)
+ return 1;
- CSTAT(call_dump_acct_info);
+ if (!*f)
+ {
+ char filename[1024];
+ char timestr[64];
+ time_t now = time(NULL);
- strftime(timestr, 64, "%Y%m%d%H%M%S", localtime(&t));
- snprintf(filename, 1024, "%s/%s", config->accounting_dir, timestr);
+ strftime(timestr, sizeof(timestr), "%Y%m%d%H%M%S", localtime(&now));
+ snprintf(filename, sizeof(filename), "%s/%s", config->accounting_dir, timestr);
- 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)
- continue;
- if (!f)
+ if (!(*f = fopen(filename, "w")))
{
- time_t now = time(NULL);
- if (!(f = fopen(filename, "w")))
- {
- LOG(0, 0, 0, "Can't write accounting info to %s: %s\n", filename, strerror(errno));
- return ;
- }
- LOG(3, 0, 0, "Dumping accounting information to %s\n", filename);
- fprintf(f, "# dslwatch.pl dump file V1.01\n"
- "# host: %s\n"
- "# time: %ld\n"
- "# uptime: %ld\n"
- "# format: username ip qos uptxoctets downrxoctets\n",
- hostname,
- now,
- now - basetime);
+ LOG(0, 0, 0, "Can't write accounting info to %s: %s\n", filename, strerror(errno));
+ return 0;
}
- LOG(4, 0, 0, "Dumping accounting information for %s\n", session[i].user);
- fprintf(f, "%s %s %d %u %u\n",
- session[i].user, // username
- fmtaddr(htonl(session[i].ip), 0), // ip
- (session[i].throttle_in || session[i].throttle_out) ? 2 : 1, // qos
- (u32)session[i].cin, // uptxoctets
- (u32)session[i].cout); // downrxoctets
+ LOG(3, 0, 0, "Dumping accounting information to %s\n", filename);
+ fprintf(*f, "# dslwatch.pl dump file V1.01\n"
+ "# host: %s\n"
+ "# time: %ld\n"
+ "# uptime: %ld\n"
+ "# format: username ip qos uptxoctets downrxoctets\n",
+ hostname,
+ now,
+ now - basetime);
+ }
+
+ LOG(4, 0, 0, "Dumping accounting information for %s\n", s->user);
+ fprintf(*f, "%s %s %d %u %u\n",
+ s->user, // username
+ fmtaddr(htonl(s->ip), 0), // ip
+ (s->throttle_in || s->throttle_out) ? 2 : 1, // qos
+ (uint32_t) s->cin, // uptxoctets
+ (uint32_t) s->cout); // downrxoctets
+
+ s->pin = s->cin = 0;
+ s->pout = s->cout = 0;
+
+ return 1;
+}
+
+static void dump_acct_info(int all)
+{
+ int i;
+ FILE *f = NULL;
+
- session[i].pin = session[i].cin = 0;
- session[i].pout = session[i].cout = 0;
+ CSTAT(dump_acct_info);
+
+ if (shut_acct_n)
+ {
+ for (i = 0; i < shut_acct_n; i++)
+ dump_session(&f, &shut_acct[i]);
+
+ shut_acct_n = 0;
}
+ if (all)
+ for (i = 1; i <= config->cluster_highest_sessionid; i++)
+ dump_session(&f, &session[i]);
+
if (f)
fclose(f);
}
init_tbf(config->num_tbfs);
LOG(0, 0, 0, "L2TPNS version " VERSION "\n");
- LOG(0, 0, 0, "Copyright (c) 2003, 2004 Optus Internet Engineering\n");
+ LOG(0, 0, 0, "Copyright (c) 2003, 2004, 2005 Optus Internet Engineering\n");
LOG(0, 0, 0, "Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced\n");
{
struct rlimit rlim;
{
if ((ret = sched_setscheduler(0, SCHED_FIFO, ¶ms)) == 0)
{
- LOG(1, 0, 0, "Using FIFO scheduler. Say goodbye to any other processes running\n");
+ LOG(1, 0, 0, "Using FIFO scheduler. Say goodbye to any other processes running\n");
}
else
{
int i;
LOG(1, 0, 0, "Shutting down without saving sessions\n");
- for (i = 1; i < MAXSESSION; i++)
- {
- if (session[i].opened)
- sessionkill(i, "L2TPNS Closing");
- }
- for (i = 1; i < MAXTUNNEL; i++)
+
+ if (config->cluster_iam_master)
{
- if (tunnel[i].ip || tunnel[i].state)
- tunnelshutdown(i, "L2TPNS Closing");
+ for (i = 1; i < MAXSESSION; i++)
+ {
+ if (session[i].opened)
+ sessionkill(i, "L2TPNS Closing");
+ }
+ for (i = 1; i < MAXTUNNEL; i++)
+ {
+ if (tunnel[i].ip || tunnel[i].state)
+ tunnelshutdown(i, "L2TPNS Closing");
+ }
}
main_quit++;
ippoolt itmp;
FILE *f;
char magic[sizeof(DUMP_MAGIC) - 1];
- u32 buf[2];
+ uint32_t buf[2];
if (!config->save_state)
{
static void dump_state()
{
FILE *f;
- u32 buf[2];
+ uint32_t buf[2];
if (!config->save_state)
return;
unlink(STATEFILE);
}
-static void build_chap_response(char *challenge, u8 id, u16 challenge_length, char **challenge_response)
+static void build_chap_response(char *challenge, uint8_t id, uint16_t challenge_length, char **challenge_response)
{
MD5_CTX ctx;
*challenge_response = NULL;
static void update_config()
{
int i;
+ char *p;
static int timeout = 0;
static int interval = 0;
fclose(log_stream);
log_stream = NULL;
}
+
if (*config->log_filename)
{
if (strstr(config->log_filename, "syslog:") == config->log_filename)
setbuf(log_stream, NULL);
}
-
// Update radius
config->numradiusservers = 0;
for (i = 0; i < MAXRADSERVER; i++)
config->num_radfds = 2 << RADIUS_SHIFT;
+ // parse radius_authtypes_s
+ config->radius_authtypes = config->radius_authprefer = 0;
+ p = config->radius_authtypes_s;
+ while (*p)
+ {
+ char *s = strpbrk(p, " \t,");
+ int type = 0;
+
+ if (s)
+ {
+ *s++ = 0;
+ while (*s == ' ' || *s == '\t')
+ s++;
+
+ if (!*s)
+ s = 0;
+ }
+
+ if (!strncasecmp("chap", p, strlen(p)))
+ type = AUTHCHAP;
+ else if (!strncasecmp("pap", p, strlen(p)))
+ type = AUTHPAP;
+ else
+ LOG(0, 0, 0, "Invalid RADIUS authentication type \"%s\"", p);
+
+ config->radius_authtypes |= type;
+ if (!config->radius_authprefer)
+ config->radius_authprefer = type;
+ }
+
+ if (!config->radius_authtypes)
+ {
+ LOG(0, 0, 0, "Defaulting to PAP authentication\n");
+ config->radius_authtypes = config->radius_authprefer = AUTHPAP;
+ }
+
+ // normalise radius_authtypes_s
+ if (config->radius_authprefer == AUTHPAP)
+ {
+ strcpy(config->radius_authtypes_s, "pap");
+ if (config->radius_authtypes & AUTHCHAP)
+ strcat(config->radius_authtypes_s, ", chap");
+ }
+ else
+ {
+ strcpy(config->radius_authtypes_s, "chap");
+ if (config->radius_authtypes & AUTHPAP)
+ strcat(config->radius_authtypes_s, ", pap");
+ }
+
+ // re-initialise the random number source
+ initrandom(config->random_device);
+
// Update plugins
for (i = 0; i < MAXPLUGINS; i++)
{
remove_plugin(config->old_plugins[i]);
}
}
+
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 = 10;
int sessionsetup(tunnelidt t, sessionidt s)
{
// A session now exists, set it up
- ipt ip;
+ in_addr_t ip;
char *user;
sessionidt i;
int r;
- CSTAT(call_sessionsetup);
+ CSTAT(sessionsetup);
LOG(3, s, t, "Doing session setup for session\n");
assign_ip_address(s);
if (!session[s].ip)
{
- LOG(0, s, t, " No IP allocated. The IP address pool is FULL!\n");
+ LOG(0, s, t, " No IP allocated. The IP address pool is FULL!\n");
sessionshutdown(s, "No IP addresses available");
return 0;
}
- LOG(3, s, t, " No IP allocated. Assigned %s from pool\n",
+ LOG(3, s, t, " No IP allocated. Assigned %s from pool\n",
fmtaddr(htonl(session[s].ip), 0));
}
// 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
+ // TEMP: old session struct used a uint32_t to define the throttle
+ // speed for both up/down, new uses a uint16_t 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;
run_plugin_done(p);
}
-static void processcontrol(u8 * buf, int len, struct sockaddr_in *addr, int alen)
+static void processcontrol(uint8_t * buf, int len, struct sockaddr_in *addr, int alen)
{
struct nsctl request;
struct nsctl response;
*
* Based on code from rp-l2tpd by Roaring Penguin Software Inc.
*/
-static int unhide_avp(u8 *avp, tunnelidt t, sessionidt s, u16 length)
+static int unhide_avp(uint8_t *avp, tunnelidt t, sessionidt s, uint16_t length)
{
MD5_CTX ctx;
- u8 *cursor;
- u8 digest[16];
- u8 working_vector[16];
+ uint8_t *cursor;
+ uint8_t digest[16];
+ uint8_t working_vector[16];
uint16_t hidden_length;
- u8 type[2];
+ uint8_t type[2];
size_t done, todo;
- u8 *output;
+ uint8_t *output;
// Find the AVP type.
type[0] = *(avp + 4);
return hidden_length + 6;
}
-static int ip_filter_port(ip_filter_portt *p, portt port)
+static int ip_filter_port(ip_filter_portt *p, uint16_t port)
{
switch (p->op)
{
return 0;
}
-static int ip_filter_flag(u8 op, u8 sflags, u8 cflags, u8 flags)
+static int ip_filter_flag(uint8_t op, uint8_t sflags, uint8_t cflags, uint8_t flags)
{
switch (op)
{
return 0;
}
-int ip_filter(u8 *buf, int len, u8 filter)
+int ip_filter(uint8_t *buf, int len, uint8_t filter)
{
- u16 frag_offset;
- u8 proto;
- ipt src_ip;
- ipt dst_ip;
- portt src_port = 0;
- portt dst_port = 0;
- u8 flags = 0;
+ uint16_t frag_offset;
+ uint8_t proto;
+ in_addr_t src_ip;
+ in_addr_t dst_ip;
+ uint16_t src_port = 0;
+ uint16_t dst_port = 0;
+ uint8_t flags = 0;
ip_filter_rulet *rule;
if (len < 20) // up to end of destination address
return 0;
- if (*buf >> 4) // IPv4
+ if ((*buf >> 4) != 4) // IPv4
return 0;
-
- frag_offset = ntohs(*(u16 *) (buf + 0)) & 0x1fff;
+ frag_offset = ntohs(*(uint16_t *) (buf + 6)) & 0x1fff;
proto = buf[9];
- src_ip = *(u32 *) (buf + 12);
- dst_ip = *(u32 *) (buf + 16);
+ src_ip = *(in_addr_t *) (buf + 12);
+ dst_ip = *(in_addr_t *) (buf + 16);
if (frag_offset == 0 && (proto == IPPROTO_TCP || proto == IPPROTO_UDP))
{
- int l = buf[0] & 0xf;
+ int l = (buf[0] & 0xf) * 4; // length of IP header
if (len < l + 4) // ports
return 0;
- src_port = ntohs(*(u16 *) (buf + l));
- dst_port = ntohs(*(u16 *) (buf + l + 2));
+ src_port = ntohs(*(uint16_t *) (buf + l));
+ dst_port = ntohs(*(uint16_t *) (buf + l + 2));
if (proto == IPPROTO_TCP)
{
- if (len < l + 15) // flags
+ if (len < l + 14) // flags
return 0;
- flags = buf[l + 14] & 0x3f;
+ flags = buf[l + 13] & 0x3f;
}
}
for (rule = ip_filters[filter].rules; rule->action; rule++)
{
- if (proto && proto != rule->proto)
+ if (rule->proto != IPPROTO_IP && proto != rule->proto)
continue;
if (rule->src_wild != INADDR_BROADCAST &&
projects / l2tpns.git / blobdiff