// 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 1.41 2004/11/04 06:05:55 bodea Exp $";
+char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.73.2.16 2005/06/01 01:10:15 bodea Exp $";
#include <arpa/inet.h>
#include <assert.h>
#include "util.h"
#include "tbf.h"
+#ifdef BGP
+#include "bgp.h"
+#endif /* BGP */
+
// Globals
-struct configt *config = NULL; // all configuration
+configt *config = NULL; // all configuration
int tunfd = -1; // tun interface file handle. (network device)
int udpfd = -1; // UDP file handle
int controlfd = -1; // Control signal handle
+int clifd = -1; // Socket listening for CLI connections.
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
time_t basetime = 0; // base clock
char hostname[1000] = ""; // us.
-int tunidx; // ifr_ifindex of tun device
-u32 sessionid = 0; // session id for radius accounting
-int syslog_log = 0; // are we logging to syslog
-FILE *log_stream = NULL; // file handle for direct logging (i.e. direct into file, not via syslog).
+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
-int clifd = 0; // Socket listening for CLI connections.
+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.
-u32 udp_tx = 0, udp_rx = 0, udp_rx_pkt = 0; // Global traffic counters.
-u32 eth_tx = 0, eth_rx = 0, eth_rx_pkt = 0;
-u32 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.
-char time_now_string[64] = {0}; // Current time as a string.
-char main_quit = 0; // True if we're in the process of exiting.
-char *_program_name = NULL;
+// Traffic counters.
+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 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.
+char main_quit = 0; // True if we're in the process of exiting.
linked_list *loaded_plugins;
linked_list *plugins[MAX_PLUGIN_TYPES];
-#ifdef BGP
-#include "bgp.h"
-struct bgp_peer *bgp_peers = 0;
-struct bgp_route_list *bgp_routes = 0;
-int bgp_configured = 0;
-#endif /* BGP */
-
#define membersize(STRUCT, MEMBER) sizeof(((STRUCT *)0)->MEMBER)
-#define CONFIG(NAME, MEMBER, TYPE) { NAME, offsetof(struct configt, MEMBER), membersize(struct configt, MEMBER), TYPE }
+#define CONFIG(NAME, MEMBER, TYPE) { NAME, offsetof(configt, MEMBER), membersize(configt, MEMBER), TYPE }
-struct config_descriptt config_values[] = {
+config_descriptt config_values[] = {
CONFIG("debug", debug, INT),
CONFIG("log_file", log_filename, STRING),
CONFIG("pid_file", pid_file, STRING),
CONFIG("radius_accounting", radius_accounting, BOOL),
CONFIG("radius_secret", radiussecret, STRING),
CONFIG("bind_address", bind_address, IP),
+ CONFIG("peer_address", peer_address, IP),
CONFIG("send_garp", send_garp, BOOL),
CONFIG("throttle_speed", rl_rate, UNSIGNED_LONG),
CONFIG("throttle_buckets", num_tbfs, INT),
CONFIG("accounting_dir", accounting_dir, STRING),
CONFIG("setuid", target_uid, INT),
CONFIG("dump_speed", dump_speed, BOOL),
- CONFIG("cleanup_interval", cleanup_interval, INT),
CONFIG("multi_read_count", multi_read_count, INT),
CONFIG("scheduler_fifo", scheduler_fifo, BOOL),
CONFIG("lock_pages", lock_pages, BOOL),
CONFIG("icmp_rate", icmp_rate, INT),
+ CONFIG("packet_limit", max_packets, INT),
CONFIG("cluster_address", cluster_address, IP),
CONFIG("cluster_interface", cluster_interface, STRING),
CONFIG("cluster_hb_interval", cluster_hb_interval, INT),
CONFIG("cluster_hb_timeout", cluster_hb_timeout, INT),
-#ifdef BGP
- CONFIG("as_number", as_number, SHORT),
- CONFIG("bgp_peer1", bgp_peer[0], STRING),
- CONFIG("bgp_peer1_as", bgp_peer_as[0], SHORT),
- CONFIG("bgp_peer2", bgp_peer[1], STRING),
- CONFIG("bgp_peer2_as", bgp_peer_as[1], SHORT),
-#endif /* BGP */
+ CONFIG("cluster_master_min_adv", cluster_master_min_adv, INT),
{ NULL, 0, 0, 0 },
};
-char *plugin_functions[] = {
+static char *plugin_functions[] = {
NULL,
"plugin_pre_auth",
"plugin_post_auth",
#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.
+sessionlocalt *sess_local = NULL; // Array of local per-session counters.
radiust *radius = NULL; // Array of radius structures.
ippoolt *ip_address_pool = NULL; // Array of dynamic IP addresses.
-controlt *controlfree = 0;
+ip_filtert *ip_filters = NULL; // Array of named filters.
+static controlt *controlfree = 0;
struct Tstats *_statistics = NULL;
#ifdef RINGBUFFER
struct Tringbuffer *ringbuffer = NULL;
#endif
-void sigalrm_handler(int);
-void sighup_handler(int);
-void sigterm_handler(int);
-void sigquit_handler(int);
-void sigchild_handler(int);
-void read_config_file();
-void read_state();
-void dump_state();
-void tunnel_clean();
-tunnelidt new_tunnel();
-void update_config();
-int unhide_avp(u8 *avp, tunnelidt t, sessionidt s, u16 length);
-
-static void cache_ipmap(ipt ip, int s);
-static void uncache_ipmap(ipt ip);
-
-// return internal time (10ths since process startup)
-clockt now(void)
+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(int all);
+static void sighup_handler(int sig);
+static void sigalrm_handler(int sig);
+static void sigterm_handler(int sig);
+static void sigquit_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, 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(uint8_t *buf, int len, struct sockaddr_in *addr, int alen);
+static tunnelidt new_tunnel(void);
+static int unhide_avp(uint8_t *avp, tunnelidt t, sessionidt s, uint16_t length);
+
+// on slaves, alow BGP to withdraw cleanly before exiting
+#define QUIT_DELAY 5
+
+// return internal time (10ths since process startup), set f if given
+static clockt now(double *f)
{
struct timeval t;
gettimeofday(&t, 0);
+ if (f) *f = t.tv_sec + t.tv_usec / 1000000.0;
return (t.tv_sec - basetime) * 10 + t.tv_usec / 100000 + 1;
}
// 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);
+ return now(NULL) + 10 * (1 << try);
}
//
-// Log a debug message.
+// Log a debug message. Typically called via the LOG macro
//
-void _log(int level, ipt address, sessionidt s, tunnelidt t, const char *format, ...)
+void _log(int level, sessionidt s, tunnelidt t, const char *format, ...)
{
static char message[65536] = {0};
static char message2[65536] = {0};
ringbuffer->head = 0;
ringbuffer->buffer[ringbuffer->tail].level = level;
- ringbuffer->buffer[ringbuffer->tail].address = address;
ringbuffer->buffer[ringbuffer->tail].session = s;
ringbuffer->buffer[ringbuffer->tail].tunnel = t;
va_start(ap, format);
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;
- // No support for log_hex to syslog
+ // No support for _log_hex to syslog
if (log_stream)
{
- _log(level, 0, 0, 0, "%s (%d bytes):\n", title, maxsize);
+ _log(level, 0, 0, "%s (%d bytes):\n", title, maxsize);
setvbuf(log_stream, NULL, _IOFBF, 16384);
for (i = 0; i < maxsize; )
// Add a route
//
// This adds it to the routing table, advertises it
-// via iBGP if enabled, and stuffs it into the
+// via BGP if enabled, and stuffs it into the
// 'sessionbyip' cache.
//
// 'ip' and 'mask' must be in _host_ order.
//
-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;
else if (mask == 0xffffffff)
r.rt_flags |= RTF_HOST;
- log(1, ip, 0, 0, "Route %s %u.%u.%u.%u/%u.%u.%u.%u %u.%u.%u.%u\n",
- add ? "add" : "del",
- ip >> 24, ip >> 16 & 0xff, ip >> 8 & 0xff, ip & 0xff,
- mask >> 24, mask >> 16 & 0xff, mask >> 8 & 0xff, mask & 0xff,
- gw >> 24, gw >> 16 & 0xff, gw >> 8 & 0xff, gw & 0xff);
+ LOG(1, s, 0, "Route %s %s/%s%s%s\n", add ? "add" : "del",
+ fmtaddr(htonl(ip), 0), fmtaddr(htonl(mask), 1),
+ gw ? " via" : "", gw ? fmtaddr(htonl(gw), 2) : "");
if (ioctl(ifrfd, add ? SIOCADDRT : SIOCDELRT, (void *) &r) < 0)
- log(0, 0, 0, 0, "routeset() error in ioctl: %s\n", strerror(errno));
+ LOG(0, 0, 0, "routeset() error in ioctl: %s\n", strerror(errno));
#ifdef BGP
if (add)
#endif /* BGP */
// Add/Remove the IPs to the 'sessionbyip' cache.
- // Note that we add the zero address in the case of
+ // Note that we add the zero address in the case of
// a network route. Roll on CIDR.
// Note that 's == 0' implies this is the address pool.
//
// Set up TUN interface
-void inittun(void)
+static void inittun(void)
{
struct ifreq ifr;
struct sockaddr_in sin = {0};
tunfd = open(TUNDEVICE, O_RDWR);
if (tunfd < 0)
{ // fatal
- log(0, 0, 0, 0, "Can't open %s: %s\n", TUNDEVICE, strerror(errno));
+ LOG(0, 0, 0, "Can't open %s: %s\n", TUNDEVICE, strerror(errno));
exit(1);
}
{
}
if (ioctl(tunfd, TUNSETIFF, (void *) &ifr) < 0)
{
- log(0, 0, 0, 0, "Can't set tun interface: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Can't set tun interface: %s\n", strerror(errno));
exit(1);
}
assert(strlen(ifr.ifr_name) < sizeof(config->tundevice));
if (ioctl(ifrfd, SIOCSIFADDR, (void *) &ifr) < 0)
{
- log(0, 0, 0, 0, "Error setting tun address: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Error setting tun address: %s\n", strerror(errno));
exit(1);
}
/* Bump up the qlen to deal with bursts from the network */
ifr.ifr_qlen = 1000;
if (ioctl(ifrfd, SIOCSIFTXQLEN, (void *) &ifr) < 0)
{
- log(0, 0, 0, 0, "Error setting tun queue length: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Error setting tun queue length: %s\n", strerror(errno));
exit(1);
}
ifr.ifr_flags = IFF_UP;
if (ioctl(ifrfd, SIOCSIFFLAGS, (void *) &ifr) < 0)
{
- log(0, 0, 0, 0, "Error setting tun flags: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Error setting tun flags: %s\n", strerror(errno));
exit(1);
}
- if (ioctl(ifrfd, SIOCGIFINDEX, (void *) &ifr) < 0)
- {
- log(0, 0, 0, 0, "Error setting tun ifindex: %s\n", strerror(errno));
- exit(1);
- }
- tunidx = ifr.ifr_ifindex;
}
// set up UDP port
-void initudp(void)
+static void initudp(void)
{
int on = 1;
struct sockaddr_in addr;
}
if (bind(udpfd, (void *) &addr, sizeof(addr)) < 0)
{
- log(0, 0, 0, 0, "Error in UDP bind: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Error in UDP bind: %s\n", strerror(errno));
exit(1);
}
snoopfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
// Control
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
- addr.sin_port = htons(1702);
- controlfd = socket(AF_INET, SOCK_DGRAM, 17);
+ addr.sin_port = htons(NSCTL_PORT);
+ controlfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
setsockopt(controlfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
if (bind(controlfd, (void *) &addr, sizeof(addr)) < 0)
{
- log(0, 0, 0, 0, "Error in control bind: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Error in control bind: %s\n", strerror(errno));
exit(1);
}
}
// IP address.
//
-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);
- if (s > 0 && s < MAXSESSION && session[s].tunnel)
- return s;
+ if (s > 0 && s < MAXSESSION && session[s].opened)
+ 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, ip, s, session[s].tunnel, "Caching ip address %s\n", inet_toa(nip));
+ LOG(4, s, session[s].tunnel, "Caching ip address %s\n", fmtaddr(nip, 0));
+
else if (s == 0)
- log(4, ip, 0, 0, "Un-caching ip address %s\n", inet_toa(nip));
+ LOG(4, 0, 0, "Un-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;
}
}
int s;
CSTAT(call_sessionbyuser);
- for (s = 1; s < MAXSESSION ; ++s)
+ for (s = 1; s <= config->cluster_highest_sessionid ; ++s)
{
+ if (!session[s].opened)
+ continue;
+
if (session[s].walled_garden)
continue; // Skip walled garden users.
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)
{
- log(0, 0, 0, 0, "Error creating socket for GARP: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Error creating socket for GARP: %s\n", strerror(errno));
return;
}
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, "eth0", sizeof(ifr.ifr_name) - 1);
if (ioctl(s, SIOCGIFHWADDR, &ifr) < 0)
{
- log(0, 0, 0, 0, "Error getting eth0 hardware address for GARP: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Error getting eth0 hardware address for GARP: %s\n", strerror(errno));
close(s);
return;
}
memcpy(mac, &ifr.ifr_hwaddr.sa_data, 6*sizeof(char));
if (ioctl(s, SIOCGIFINDEX, &ifr) < 0)
{
- log(0, 0, 0, 0, "Error getting eth0 interface index for GARP: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Error getting eth0 interface index for GARP: %s\n", strerror(errno));
close(s);
return;
}
sendarp(ifr.ifr_ifindex, mac, ip);
}
-// Find session by username, 0 for not found
-sessiont *sessiontbysessionidt(sessionidt s)
+static sessiont *sessiontbysessionidt(sessionidt s)
{
- if (!s || s > MAXSESSION) return NULL;
+ if (!s || s >= MAXSESSION) return NULL;
return &session[s];
}
-sessionidt sessionidtbysessiont(sessiont *s)
+static sessionidt sessionidtbysessiont(sessiont *s)
{
sessionidt val = s-session;
- if (s < session || val > MAXSESSION) return 0;
+ if (s < session || val >= MAXSESSION) return 0;
return val;
}
// 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;
if (!t)
{
static int backtrace_count = 0;
- log(0, 0, 0, t, "tunnelsend called with 0 as tunnel id\n");
+ LOG(0, 0, t, "tunnelsend called with 0 as tunnel id\n");
STAT(tunnel_tx_errors);
log_backtrace(backtrace_count, 5)
return;
if (!tunnel[t].ip)
{
static int backtrace_count = 0;
- log(1, 0, 0, t, "Error sending data out tunnel: no remote endpoint (tunnel not set up)\n");
+ LOG(1, 0, t, "Error sending data out tunnel: no remote endpoint (tunnel not set up)\n");
log_backtrace(backtrace_count, 5)
STAT(tunnel_tx_errors);
return;
}
+
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 (tunnel[t].try > 1)
{
STAT(tunnel_retries);
- log(3, tunnel[t].ip, 0, t, "Control message resend try %d\n", tunnel[t].try);
+ LOG(3, 0, t, "Control message resend try %d\n", tunnel[t].try);
}
}
if (sendto(udpfd, buf, l, 0, (void *) &addr, sizeof(addr)) < 0)
{
- log(0, tunnel[t].ip, 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;
}
- log_hex(5, "Send Tunnel Data", buf, l);
+ LOG_HEX(5, "Send Tunnel Data", buf, l);
STAT(tunnel_tx_packets);
INC_STAT(tunnel_tx_bytes, l);
}
// 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
//
-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.
+ char *data = buf; // Keep a copy of the originals.
int size = len;
- u8 b[MAXETHER + 20];
+ uint8_t b[MAXETHER + 20];
CSTAT(call_processipout);
if (len < MIN_IP_SIZE)
{
- log(1, 0, 0, 0, "Short IP, %d bytes\n", len);
- STAT(tunnel_tx_errors);
+ LOG(1, 0, 0, "Short IP, %d bytes\n", len);
+ STAT(tun_rx_errors);
return;
}
if (len >= MAXETHER)
{
- log(1, 0, 0, 0, "Oversize IP packet %d bytes\n", len);
- STAT(tunnel_tx_errors);
+ LOG(1, 0, 0, "Oversize IP packet %d bytes\n", len);
+ STAT(tun_rx_errors);
return;
}
len -= 4;
// Got an IP header now
- if (*(u8 *)(buf) >> 4 != 4)
+ if (*(uint8_t *)(buf) >> 4 != 4)
{
- log(1, 0, 0, 0, "IP: Don't understand anything except IPv4\n");
+ 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, 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);
+ 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;
}
t = session[s].tunnel;
sp = &session[s];
+ // DoS prevention: enforce a maximum number of packets per 0.1s for a session
+ if (config->max_packets > 0)
+ {
+ if (sess_local[s].last_packet_out == TIME)
+ {
+ int max = config->max_packets;
+
+ // All packets for throttled sessions are handled by the
+ // master, so further limit by using the throttle rate.
+ // A bit of a kludge, since throttle rate is in kbps,
+ // but should still be generous given our average DSL
+ // packet size is 200 bytes: a limit of 28kbps equates
+ // to around 180 packets per second.
+ if (!config->cluster_iam_master && sp->throttle_out && sp->throttle_out < max)
+ max = sp->throttle_out;
+
+ if (++sess_local[s].packets_out > max)
+ {
+ sess_local[s].packets_dropped++;
+ return;
+ }
+ }
+ else
+ {
+ if (sess_local[s].packets_dropped)
+ {
+ INC_STAT(tun_rx_dropped, sess_local[s].packets_dropped);
+ LOG(3, s, t, "Dropped %u/%u packets to %s for %suser %s\n",
+ sess_local[s].packets_dropped, sess_local[s].packets_out,
+ fmtaddr(ip, 0), sp->throttle_out ? "throttled " : "",
+ sp->user);
+ }
+
+ sess_local[s].last_packet_out = TIME;
+ sess_local[s].packets_out = 1;
+ sess_local[s].packets_dropped = 0;
+ }
+ }
+
+ // run access-list if any
+ if (session[s].filter_out && !ip_filter(buf, len, session[s].filter_out - 1))
+ return;
+
if (sp->tbf_out)
{
// Are we throttling this session?
return;
}
- // Snooping this session, send it to intercept box
- if (sp->snoop_ip && sp->snoop_port)
- snoop_send_packet(buf, len, sp->snoop_ip, sp->snoop_port);
-
- log(5, session[s].ip, s, t, "Ethernet -> Tunnel (%d bytes)\n", len);
+ LOG(5, s, t, "Ethernet -> Tunnel (%d bytes)\n", len);
// Add on L2TP header
{
- u8 *p = makeppp(b, sizeof(b), buf, len, t, s, PPPIP);
- if (!p)
- {
- log(3, session[s].ip, s, t, "failed to send packet in processipout.\n");
- return;
- }
+ uint8_t *p = makeppp(b, sizeof(b), buf, len, t, s, PPPIP);
+ if (!p) return;
tunnelsend(b, len + (p-b), t); // send it...
}
+ // Snooping this session, send it to intercept box
+ if (sp->snoop_ip && sp->snoop_port)
+ snoop_send_packet(buf, len, sp->snoop_ip, sp->snoop_port);
+
sp->cout += len; // byte count
sp->total_cout += len; // byte count
sp->pout++;
udp_tx += len;
- sess_count[s].cout += len; // To send to master..
+ sess_local[s].cout += len; // To send to master..
}
//
// Helper routine for the TBF filters.
// Used to send queued data in to the user!
//
-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)
{
- log(1,0,0,0, "Odd size IP packet: %d bytes\n", len);
+ LOG(1, 0, 0, "Odd size IP packet: %d bytes\n", len);
return;
}
buf += 4;
len -= 4;
- ip = *(u32 *)(buf + 16);
+ ip = *(in_addr_t *)(buf + 16);
if (!session[s].ip)
return;
+
t = session[s].tunnel;
sp = &session[s];
- log(5, session[s].ip, s, t, "Ethernet -> Tunnel (%d bytes)\n", len);
-
- // Snooping this session.
- if (sp->snoop_ip && sp->snoop_port)
- snoop_send_packet(buf, len, sp->snoop_ip, sp->snoop_port);
+ LOG(5, s, t, "Ethernet -> Tunnel (%d bytes)\n", len);
// Add on L2TP header
{
- u8 *p = makeppp(b, sizeof(b), buf, len, t, s, PPPIP);
- if (!p)
- {
- log(3, session[s].ip, s, t, "failed to send packet in send_ipout.\n");
- return;
- }
+ uint8_t *p = makeppp(b, sizeof(b), buf, len, t, s, PPPIP);
+ if (!p) return;
tunnelsend(b, len + (p-b), t); // send it...
}
+
+ // Snooping this session.
+ if (sp->snoop_ip && sp->snoop_port)
+ snoop_send_packet(buf, len, sp->snoop_ip, sp->snoop_port);
+
sp->cout += len; // byte count
sp->total_cout += len; // byte count
sp->pout++;
udp_tx += len;
- sess_count[s].cout += len; // To send to master..
+ sess_local[s].cout += len; // To send to master..
}
// add an AVP (16 bit)
-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)
-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)
-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
-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
-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;
// send zero block if nothing is waiting
// (ZLB send).
-void controlnull(tunnelidt t)
+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
-void controladd(controlt * c, tunnelidt t, sessionidt s)
+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)
tunnel[t].controle->next = c;
else
tunnel[t].controls = c;
+
tunnel[t].controle = c;
tunnel[t].controlc++;
+
// send now if space in window
if (tunnel[t].controlc <= tunnel[t].window)
{
//
void throttle_session(sessionidt s, int rate_in, int rate_out)
{
- if (!session[s].tunnel)
+ if (!session[s].opened)
return; // No-one home.
if (!*session[s].user)
}
}
+// add/remove filters from session (-1 = no change)
+void filter_session(sessionidt s, int filter_in, int filter_out)
+{
+ if (!session[s].opened)
+ return; // No-one home.
+
+ if (!*session[s].user)
+ return; // User not logged in
+
+ // paranoia
+ if (filter_in > MAXFILTER) filter_in = -1;
+ if (filter_out > MAXFILTER) filter_out = -1;
+ if (session[s].filter_in > MAXFILTER) session[s].filter_in = 0;
+ if (session[s].filter_out > MAXFILTER) session[s].filter_out = 0;
+
+ if (filter_in >= 0)
+ {
+ if (session[s].filter_in)
+ ip_filters[session[s].filter_in - 1].used--;
+
+ if (filter_in > 0)
+ ip_filters[filter_in - 1].used++;
+
+ session[s].filter_in = filter_in;
+ }
+
+ if (filter_out >= 0)
+ {
+ if (session[s].filter_out)
+ ip_filters[session[s].filter_out - 1].used--;
+
+ if (filter_out > 0)
+ ip_filters[filter_out - 1].used++;
+
+ session[s].filter_out = filter_out;
+ }
+}
+
// start tidy shutdown of session
void sessionshutdown(sessionidt s, char *reason)
{
- int dead = session[s].die;
int walled_garden = session[s].walled_garden;
CSTAT(call_sessionshutdown);
- if (!session[s].tunnel)
+ if (!session[s].opened)
{
- log(3, session[s].ip, s, session[s].tunnel, "Called sessionshutdown on a session with no tunnel.\n");
+ LOG(3, s, session[s].tunnel, "Called sessionshutdown on an unopened session.\n");
return; // not a live session
}
- if (!dead)
- log(2, 0, s, session[s].tunnel, "Shutting down session %d: %s\n", s, reason);
-
- session[s].die = now() + 150; // Clean up in 15 seconds
-
+ if (!session[s].die)
{
struct param_kill_session data = { &tunnel[session[s].tunnel], &session[s] };
+ LOG(2, s, session[s].tunnel, "Shutting down session %d: %s\n", s, reason);
run_plugins(PLUGIN_KILL_SESSION, &data);
}
- // RADIUS Stop message
- if (session[s].opened && !walled_garden && !dead)
+ if (session[s].ip && !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)))
{
- log(1, 0, s, session[s].tunnel, "No free RADIUS sessions for Stop message\n");
- STAT(radius_overflow);
+ LOG(1, s, session[s].tunnel, "No free RADIUS sessions for Stop message\n");
}
else
{
radius[r].auth[n] = rand();
}
}
+
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)
{ // IP allocated, clear and unroute
int r;
+ int routed = 0;
for (r = 0; r < MAXROUTE && session[s].route[r].ip; r++)
{
- routeset(s, session[s].route[r].ip, session[s].route[r].mask, session[s].ip, 0);
+ if ((session[s].ip & session[s].route[r].mask) ==
+ (session[s].route[r].ip & session[s].route[r].mask))
+ routed++;
+
+ routeset(s, session[s].route[r].ip, session[s].route[r].mask, 0, 0);
session[s].route[r].ip = 0;
}
if (session[s].ip_pool_index == -1) // static ip
{
- routeset(s, session[s].ip, 0, 0, 0); // Delete route.
+ if (!routed) routeset(s, session[s].ip, 0, 0, 0);
session[s].ip = 0;
}
else
controladd(c, session[s].tunnel, s); // send the message
}
+ if (!session[s].die)
+ session[s].die = TIME + 150; // Clean up in 15 seconds
+
+ // update filter refcounts
+ if (session[s].filter_in) ip_filters[session[s].filter_in - 1].used--;
+ if (session[s].filter_out) ip_filters[session[s].filter_out - 1].used--;
+
cluster_send_session(s);
}
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);
if (!r)
r = radiusnew(s);
+ if (!r)
+ {
+ sessionshutdown(s, "No free RADIUS sessions for IPCP");
+ return;
+ }
+
if (radius[r].state != RADIUSIPCP)
{
radius[r].state = RADIUSIPCP;
}
q = makeppp(buf,sizeof(buf), 0, 0, t, s, PPPIPCP);
- if (!q)
- {
- log(3, session[s].ip, s, t, "failed to send packet in sendipcp.\n");
- return;
- }
+ if (!q) return;
*q = ConfigReq;
- q[1] = r << RADIUS_SHIFT; // ID, dont care, we only send one type of request
- *(u16 *) (q + 2) = htons(10);
+ q[1] = r >> RADIUS_SHIFT; // ID, dont care, we only send one type of request
+ *(uint16_t *) (q + 2) = htons(10);
q[4] = 3;
q[5] = 6;
- *(u32 *) (q + 6) = 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 sessionclear(sessionidt s)
+{
+ memset(&session[s], 0, sizeof(session[s]));
+ memset(&sess_local[s], 0, sizeof(sess_local[s]));
+ memset(&cli_session_actions[s], 0, sizeof(cli_session_actions[s]));
+
+ session[s].tunnel = T_FREE; // Mark it as free.
+ session[s].next = sessionfree;
+ sessionfree = s;
+}
+
// kill a session now
void sessionkill(sessionidt s, char *reason)
{
CSTAT(call_sessionkill);
- session[s].die = now();
+ if (!session[s].opened) // not alive
+ return;
+
+ if (session[s].next)
+ {
+ LOG(0, s, session[s].tunnel, "Tried to kill a session with next pointer set (%d)\n", session[s].next);
+ return;
+ }
+
+ session[s].die = TIME;
sessionshutdown(s, reason); // close radius/routes, etc.
if (session[s].radius)
radiusclear(session[s].radius, s); // cant send clean accounting data, session is killed
- log(2, 0, s, session[s].tunnel, "Kill session %d (%s): %s\n", s, session[s].user, reason);
-
- memset(&session[s], 0, sizeof(session[s]));
- session[s].tunnel = T_FREE; // Mark it as free.
- session[s].next = sessionfree;
- sessionfree = s;
- cli_session_actions[s].action = 0;
+ LOG(2, s, session[s].tunnel, "Kill session %d (%s): %s\n", s, session[s].user, reason);
+ sessionclear(s);
cluster_send_session(s);
}
+static void tunnelclear(tunnelidt t)
+{
+ if (!t) return;
+ memset(&tunnel[t], 0, sizeof(tunnel[t]));
+ tunnel[t].state = TUNNELFREE;
+}
+
// kill a tunnel now
-void tunnelkill(tunnelidt t, char *reason)
+static void tunnelkill(tunnelidt t, char *reason)
{
sessionidt s;
controlt *c;
controlfree = c;
}
// kill sessions
- for (s = 1; s < MAXSESSION; s++)
+ for (s = 1; s <= config->cluster_highest_sessionid ; ++s)
if (session[s].tunnel == t)
sessionkill(s, reason);
// free tunnel
tunnelclear(t);
- log(1, 0, 0, t, "Kill tunnel %d: %s\n", t, reason);
+ LOG(1, 0, t, "Kill tunnel %d: %s\n", t, reason);
cli_tunnel_actions[s].action = 0;
cluster_send_tunnel(t);
}
// shut down a tunnel cleanly
-void tunnelshutdown(tunnelidt t, char *reason)
+static void tunnelshutdown(tunnelidt t, char *reason)
{
sessionidt s;
tunnelkill(t, reason);
return;
}
- log(1, 0, 0, t, "Shutting down tunnel %d (%s)\n", t, reason);
+ LOG(1, 0, t, "Shutting down tunnel %d (%s)\n", t, reason);
// close session
- for (s = 1; s < MAXSESSION; s++)
+ for (s = 1; s <= config->cluster_highest_sessionid ; ++s)
if (session[s].tunnel == t)
- sessionkill(s, reason);
+ sessionshutdown(s, reason);
tunnel[t].state = TUNNELDIE;
- tunnel[t].die = now() + 700; // Clean up in 70 seconds
+ tunnel[t].die = TIME + 700; // Clean up in 70 seconds
cluster_send_tunnel(t);
// 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);
udp_rx += len;
udp_rx_pkt++;
- log_hex(5, "UDP Data", buf, len);
+ LOG_HEX(5, "UDP Data", buf, len);
STAT(tunnel_rx_packets);
INC_STAT(tunnel_rx_bytes, len);
if (len < 6)
{
- log(1, ntohl(addr->sin_addr.s_addr), 0, 0, "Short UDP, %d bytes\n", len);
+ LOG(1, 0, 0, "Short UDP, %d bytes\n", len);
STAT(tunnel_rx_errors);
return;
}
if ((buf[1] & 0x0F) != 2)
{
- log(1, ntohl(addr->sin_addr.s_addr), 0, 0, "Bad L2TP ver %d\n", (buf[1] & 0x0F) != 2);
+ LOG(1, 0, 0, "Bad L2TP ver %d\n", (buf[1] & 0x0F) != 2);
STAT(tunnel_rx_errors);
return;
}
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)
{
- log(1, ntohl(addr->sin_addr.s_addr), s, t, "Received UDP packet with invalid session ID\n");
+ LOG(1, s, t, "Received UDP packet with invalid session ID\n");
STAT(tunnel_rx_errors);
return;
}
if (t >= MAXTUNNEL)
{
- log(1, ntohl(addr->sin_addr.s_addr), s, t, "Received UDP packet with invalid tunnel ID\n");
+ LOG(1, s, t, "Received UDP packet with invalid tunnel ID\n");
STAT(tunnel_rx_errors);
return;
}
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, ntohl(addr->sin_addr.s_addr), 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)
{
if ((*buf & 0xCA) != 0xC8)
{
- log(1, ntohl(addr->sin_addr.s_addr), s, t, "Bad control header %02X\n", *buf);
+ LOG(1, s, t, "Bad control header %02X\n", *buf);
STAT(tunnel_rx_errors);
return;
}
- log(3, ntohl(addr->sin_addr.s_addr), s, t, "Control message (%d bytes): (unacked %d) l-ns %d l-nr %d r-ns %d r-nr %d\n",
- l, tunnel[t].controlc, tunnel[t].ns, tunnel[t].nr, ns, nr);
- // if no tunnel specified, assign one
- if (!t)
+
+ // check for duplicate tunnel open message
+ if (!t && ns == 0)
{
int i;
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;
+ LOG(3, s, t, "Duplicate SCCRQ?\n");
break;
}
}
+ LOG(3, s, t, "Control message (%d bytes): (unacked %d) l-ns %d l-nr %d r-ns %d r-nr %d\n",
+ l, tunnel[t].controlc, tunnel[t].ns, tunnel[t].nr, ns, nr);
+
+ // if no tunnel specified, assign one
if (!t)
{
if (!(t = new_tunnel()))
{
- log(1, ntohl(addr->sin_addr.s_addr), 0, 0, "No more tunnels\n");
+ LOG(1, 0, 0, "No more tunnels\n");
STAT(tunnel_overflow);
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
- 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);
+ LOG(1, 0, t, " New tunnel from %s:%u ID %d\n",
+ fmtaddr(htonl(tunnel[t].ip), 0), tunnel[t].port, t);
+ }
+
+ // If the 'ns' just received is not the 'nr' we're
+ // expecting, just send an ack and drop it.
+ //
+ // if 'ns' is less, then we got a retransmitted packet.
+ // if 'ns' is greater than missed a packet. Either way
+ // we should ignore it.
+ if (ns != tunnel[t].nr)
+ {
+ // is this the sequence we were expecting?
+ STAT(tunnel_rx_errors);
+ LOG(1, 0, t, " Out of sequence tunnel %d, (%d is not the expected %d)\n",
+ t, ns, tunnel[t].nr);
+
+ if (l) // Is this not a ZLB?
+ controlnull(t);
+ return;
}
// This is used to time out old tunnels
{
int skip = tunnel[t].window; // track how many in-window packets are still in queue
// some to clear maybe?
- while (tunnel[t].controlc && (((tunnel[t].ns - tunnel[t].controlc) - nr) & 0x8000))
+ while (tunnel[t].controlc > 0 && (((tunnel[t].ns - tunnel[t].controlc) - nr) & 0x8000))
{
controlt *c = tunnel[t].controls;
tunnel[t].controls = c->next;
tunnel[t].try = 0; // we have progress
}
- // If the 'ns' just received is not the 'nr' we're
- // expecting, just send an ack and drop it.
- //
- // if 'ns' is less, then we got a retransmitted packet.
- // if 'ns' is greater than missed a packet. Either way
- // we should ignore it.
- if (ns != tunnel[t].nr)
- {
- // is this the sequence we were expecting?
- log(1, ntohl(addr->sin_addr.s_addr), 0, t, " Out of sequence tunnel %d, (%d is not the expected %d)\n", t, ns, tunnel[t].nr);
- STAT(tunnel_rx_errors);
-
- if (l) // Is this not a ZLB?
- controlnull(t);
- return;
- }
// receiver advance (do here so quoted correctly in any sends below)
if (l) tunnel[t].nr = (ns + 1);
if (skip < 0) skip = 0;
// 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)
{
- log(1, ntohl(addr->sin_addr.s_addr), s, t, "Invalid length in AVP\n");
+ LOG(1, s, t, "Invalid length in AVP\n");
STAT(tunnel_rx_errors);
fatal = flags;
return;
// handle hidden AVPs
if (!*config->l2tpsecret)
{
- log(1, ntohl(addr->sin_addr.s_addr), s, t, "Hidden AVP requested, but no L2TP secret.\n");
+ LOG(1, s, t, "Hidden AVP requested, but no L2TP secret.\n");
fatal = flags;
continue;
}
if (!session[s].random_vector_length)
{
- log(1, ntohl(addr->sin_addr.s_addr), s, t, "Hidden AVP requested, but no random vector.\n");
+ LOG(1, s, t, "Hidden AVP requested, but no random vector.\n");
fatal = flags;
continue;
}
- log(4, ntohl(addr->sin_addr.s_addr), s, t, "Hidden AVP\n");
+ LOG(4, s, t, "Hidden AVP\n");
// Unhide the AVP
n = unhide_avp(b, t, s, n);
if (n == 0)
}
if (*b & 0x3C)
{
- log(1, ntohl(addr->sin_addr.s_addr), s, t, "Unrecognised AVP flags %02X\n", *b);
+ LOG(1, s, t, "Unrecognised AVP flags %02X\n", *b);
fatal = flags;
continue; // next
}
b += 2;
- if (*(u16 *) (b))
+ if (*(uint16_t *) (b))
{
- log(2, ntohl(addr->sin_addr.s_addr), 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, ntohl(addr->sin_addr.s_addr), s, t, " AVP %d (%s) len %d\n", mtype, avpnames[mtype], n);
+ LOG(4, s, t, " AVP %d (%s) len %d\n", mtype, avpnames[mtype], n);
switch (mtype)
{
case 0: // message type
- message = ntohs(*(u16 *) b);
- log(4, ntohl(addr->sin_addr.s_addr), 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_types[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 */
resdesc = cdn_result_codes[rescode];
}
- log(4, ntohl(addr->sin_addr.s_addr), s, t, " Result Code %d: %s\n",
- rescode, resdesc);
+ LOG(4, s, t, " Result Code %d: %s\n", rescode, resdesc);
if (n >= 4)
{
- u16 errcode = ntohs(*(u16 *)(b + 2));
+ uint16_t errcode = ntohs(*(uint16_t *)(b + 2));
const char* errdesc = "(unknown)";
if (errcode <= MAX_ERROR_CODE)
errdesc = error_codes[errcode];
- log(4, ntohl(addr->sin_addr.s_addr), s, t, " Error Code %d: %s\n",
- errcode, errdesc);
+ LOG(4, s, t, " Error Code %d: %s\n", errcode, errdesc);
}
if (n > 4)
- log(4, ntohl(addr->sin_addr.s_addr), s, t, " Error String: %.*s\n",
- n-4, b+4);
+ LOG(4, s, t, " Error String: %.*s\n", n-4, b+4);
break;
}
break;
case 2: // protocol version
{
- version = ntohs(*(u16 *) (b));
- log(4, ntohl(addr->sin_addr.s_addr), s, t, " Protocol version = %d\n", version);
+ 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(1, ntohl(addr->sin_addr.s_addr), s, t, " Bad protocol version %04X\n",
- version);
+ LOG(1, s, t, " Bad protocol version %04X\n", version);
fatal = flags;
continue; // next
}
}
break;
case 3: // framing capabilities
-// log(4, ntohl(addr->sin_addr.s_addr), s, t, "Framing capabilities\n");
+// LOG(4, s, t, "Framing capabilities\n");
break;
case 4: // bearer capabilities
-// log(4, ntohl(addr->sin_addr.s_addr), s, t, "Bearer capabilities\n");
+// LOG(4, s, t, "Bearer capabilities\n");
break;
case 5: // tie breaker
// 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");
+// LOG(4, s, t, "Tie breaker\n");
continue;
case 6: // firmware revision
-// log(4, ntohl(addr->sin_addr.s_addr), s, t, "Firmware revision\n");
+// LOG(4, s, t, "Firmware revision\n");
break;
case 7: // host name
memset(tunnel[t].hostname, 0, 128);
memcpy(tunnel[t].hostname, b, (n >= 127) ? 127 : n);
- log(4, ntohl(addr->sin_addr.s_addr), s, t, " Tunnel hostname = \"%s\"\n", tunnel[t].hostname);
+ LOG(4, s, t, " Tunnel hostname = \"%s\"\n", tunnel[t].hostname);
// TBA - to send to RADIUS
break;
case 8: // vendor name
memset(tunnel[t].vendor, 0, sizeof(tunnel[t].vendor));
memcpy(tunnel[t].vendor, b, (n >= sizeof(tunnel[t].vendor) - 1) ? sizeof(tunnel[t].vendor) - 1 : n);
- log(4, ntohl(addr->sin_addr.s_addr), s, t, " Vendor name = \"%s\"\n", tunnel[t].vendor);
+ LOG(4, s, t, " Vendor name = \"%s\"\n", tunnel[t].vendor);
break;
case 9: // assigned tunnel
- tunnel[t].far = ntohs(*(u16 *) (b));
- log(4, ntohl(addr->sin_addr.s_addr), s, t, " Remote tunnel id = %d\n", tunnel[t].far);
+ 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, ntohl(addr->sin_addr.s_addr), s, t, " rx window = %d\n", tunnel[t].window);
+ LOG(4, s, t, " rx window = %d\n", tunnel[t].window);
break;
case 11: // Challenge
{
- log(4, ntohl(addr->sin_addr.s_addr), s, t, " LAC requested CHAP authentication for tunnel\n");
+ LOG(4, s, t, " LAC requested CHAP authentication for tunnel\n");
build_chap_response(b, 2, n, &chapresponse);
}
break;
case 13: // Response
// Why did they send a response? We never challenge.
- log(2, ntohl(addr->sin_addr.s_addr), s, t, " received unexpected challenge response\n");
+ LOG(2, s, t, " received unexpected challenge response\n");
break;
case 14: // assigned session
- asession = session[s].far = ntohs(*(u16 *) (b));
- log(4, ntohl(addr->sin_addr.s_addr), s, t, " assigned session = %d\n", asession);
+ 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, ntohl(addr->sin_addr.s_addr), 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, ntohl(addr->sin_addr.s_addr), 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, ntohl(addr->sin_addr.s_addr), 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
memset(called, 0, MAXTEL);
memcpy(called, b, (n >= MAXTEL) ? (MAXTEL-1) : n);
- log(4, ntohl(addr->sin_addr.s_addr), s, t, " Called <%s>\n", called);
+ LOG(4, s, t, " Called <%s>\n", called);
break;
case 22: // calling number
memset(calling, 0, MAXTEL);
memcpy(calling, b, (n >= MAXTEL) ? (MAXTEL-1) : n);
- log(4, ntohl(addr->sin_addr.s_addr), s, t, " Calling <%s>\n", calling);
+ LOG(4, s, t, " Calling <%s>\n", calling);
break;
case 23: // subtype
break;
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
{
memcpy(tmp, b, (n >= 30) ? 30 : n);
session[s].tx_connect_speed = atol(tmp);
}
- log(4, ntohl(addr->sin_addr.s_addr), s, t, " TX connect speed <%u>\n",
- session[s].tx_connect_speed);
+ LOG(4, s, t, " TX connect speed <%u>\n", session[s].tx_connect_speed);
break;
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
{
memcpy(tmp, b, (n >= 30) ? 30 : n);
session[s].rx_connect_speed = atol(tmp);
}
- log(4, ntohl(addr->sin_addr.s_addr), s, t, " RX connect speed <%u>\n",
- session[s].rx_connect_speed);
+ LOG(4, s, t, " RX connect speed <%u>\n", session[s].rx_connect_speed);
break;
case 25: // Physical Channel ID
{
- u32 tmp = ntohl(*(u32 *)b);
- log(4, ntohl(addr->sin_addr.s_addr), s, t, " Physical Channel ID <%X>\n", tmp);
+ 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, ntohl(addr->sin_addr.s_addr), s, t, " Proxy Auth Type %d (%s)\n",
- authtype, authtypes[authtype]);
+ uint16_t authtype = ntohs(*(uint16_t *)b);
+ LOG(4, s, t, " Proxy Auth Type %d (%s)\n", authtype, authtypes[authtype]);
requestchap = (authtype == 2);
break;
}
{
char authname[64] = {0};
memcpy(authname, b, (n > 63) ? 63 : n);
- log(4, ntohl(addr->sin_addr.s_addr), s, t, " Proxy Auth Name (%s)\n",
+ LOG(4, s, t, " Proxy Auth Name (%s)\n",
authname);
break;
}
case 31: // Proxy Authentication Challenge
{
memcpy(radius[session[s].radius].auth, b, 16);
- log(4, ntohl(addr->sin_addr.s_addr), s, t, " Proxy Auth Challenge\n");
+ LOG(4, s, t, " Proxy Auth Challenge\n");
break;
}
case 32: // Proxy Authentication ID
{
- u16 authid = ntohs(*(u16 *)(b));
- log(4, ntohl(addr->sin_addr.s_addr), s, t, " Proxy Auth ID (%d)\n",
- authid);
+ 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;
break;
{
char authresp[64] = {0};
memcpy(authresp, b, (n > 63) ? 63 : n);
- log(4, ntohl(addr->sin_addr.s_addr), s, t, " Proxy Auth Response\n");
+ LOG(4, s, t, " Proxy Auth Response\n");
break;
}
case 27: // last send lcp
{ // find magic number
- u8 *p = b, *e = p + n;
- while (p < e && p[1])
+ uint8_t *p = b, *e = p + n;
+ while (p + 1 < e && p[1] && p + p[1] <= e)
{
- if (*p == 5 && p[1] == 6)
- amagic = ntohl(*(u32 *) (p + 2));
- else if (*p == 3 && p[1] == 5 && *(u16 *) (p + 2) == htons(PPPCHAP) && p[4] == 5)
+ if (*p == 5 && p[1] == 6) // Magic-Number
+ 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)
+ else if (*p == 7) // Protocol-Field-Compression
aflags |= SESSIONPFC;
- else if (*p == 8)
+ else if (*p == 8) // Address-and-Control-Field-Compression
aflags |= SESSIONACFC;
p += p[1];
}
-
- {
- char tmp[500] = {0};
- tmp[0] = ConfigReq;
- memcpy((tmp + 1), b, n);
- }
}
break;
case 28: // last recv lcp confreq
- {
- char tmp[500] = {0};
- tmp[0] = ConfigReq;
- memcpy((tmp + 1), b, n);
- break;
- }
+ break;
case 26: // Initial Received LCP CONFREQ
- {
- char tmp[500] = {0};
- tmp[0] = ConfigReq;
- memcpy((tmp + 1), b, n);
- }
break;
case 39: // seq required - we control it as an LNS anyway...
break;
case 36: // Random Vector
- log(4, ntohl(addr->sin_addr.s_addr), 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;
break;
default:
- log(2, ntohl(addr->sin_addr.s_addr), s, t, " Unknown AVP type %d\n", mtype);
+ LOG(2, s, t, " Unknown AVP type %d\n", mtype);
fatal = flags;
continue; // next
}
if (!sessionfree)
{
STAT(session_overflow);
- tunnelshutdown(t, "No free sessions");
+ LOG(1, 0, t, "No free sessions\n");
+ return;
}
else
{
- u16 r;
+ uint16_t r;
controlt *c;
s = sessionfree;
// make a RADIUS session
if (!(r = radiusnew(s)))
{
- log(1, ntohl(addr->sin_addr.s_addr), s, t, "No free RADIUS sessions for ICRQ\n");
- sessionkill(s, "no free RADIUS sesions");
+ LOG(1, s, t, "No free RADIUS sessions for ICRQ\n");
+ sessionclear(s);
return;
}
c = controlnew(11); // sending ICRP
session[s].id = sessionid++;
- session[s].opened = time(NULL);
+ session[s].opened = time_now;
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);
+ 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
{
if (amagic == 0) amagic = time_now;
session[s].magic = amagic; // set magic number
session[s].l2tp_flags = aflags; // set flags received
- log(3, ntohl(addr->sin_addr.s_addr), s, t, "Magic %X Flags %X\n", amagic, aflags);
+ LOG(3, s, t, "Magic %X Flags %X\n", amagic, aflags);
controlnull(t); // ack
// In CHAP state, request PAP instead
if (requestchap)
sessionshutdown(s, "Closed (Received CDN)");
break;
case 0xFFFF:
- log(1, ntohl(addr->sin_addr.s_addr), s, t, "Missing message type\n");
+ LOG(1, s, t, "Missing message type\n");
break;
default:
STAT(tunnel_rx_errors);
if (mandatorymessage & 0x80)
tunnelshutdown(t, "Unknown message");
else
- log(1, ntohl(addr->sin_addr.s_addr), s, t, "Unknown message type %d\n", message);
+ LOG(1, s, t, "Unknown message type %d\n", message);
break;
}
if (chapresponse) free(chapresponse);
}
else
{
- log(4, 0, s, t, " Got a ZLB ack\n");
+ LOG(4, s, t, " Got a ZLB ack\n");
}
}
else
{ // data
- u16 prot;
+ uint16_t prot;
- log_hex(5, "Receive Tunnel Data", p, l);
+ LOG_HEX(5, "Receive Tunnel Data", p, l);
if (l > 2 && p[0] == 0xFF && p[1] == 0x03)
{ // HDLC address header, discard
p += 2;
}
if (l < 2)
{
- log(1, ntohl(addr->sin_addr.s_addr), s, t, "Short ppp length %d\n", l);
+ LOG(1, s, t, "Short ppp length %d\n", l);
STAT(tunnel_rx_errors);
return;
}
}
else
{
- prot = ntohs(*(u16 *) p);
+ prot = ntohs(*(uint16_t *) p);
p += 2;
l -= 2;
}
- if (s && !session[s].tunnel) // Is something wrong??
+ if (s && !session[s].opened) // Is something wrong??
{
if (!config->cluster_iam_master)
{
return;
}
-
- log(1, ntohl(addr->sin_addr.s_addr), s, t, "UDP packet contains session %d "
- "but no session[%d].tunnel exists (LAC said"
- " tunnel = %d). Dropping packet.\n", s, s, t);
+ LOG(1, s, t, "UDP packet contains session which is not opened. Dropping packet.\n");
STAT(tunnel_rx_errors);
return;
}
- if (session[s].die)
- {
- log(3, ntohl(addr->sin_addr.s_addr), 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
{
STAT(tunnel_rx_errors);
- log(1, ntohl(addr->sin_addr.s_addr), s, t, "Unknown PPP protocol %04X\n", prot);
+ LOG(1, s, t, "Unknown PPP protocol %04X\n", prot);
}
}
}
// read and process packet on tun
-void processtun(u8 * buf, int len)
+static void processtun(uint8_t * buf, int len)
{
- log_hex(5, "Receive TUN Data", buf, len);
+ LOG_HEX(5, "Receive TUN Data", buf, len);
STAT(tun_rx_packets);
INC_STAT(tun_rx_bytes, len);
eth_rx += len;
if (len < 22)
{
- log(1, 0, 0, 0, "Short tun packet %d bytes\n", len);
+ LOG(1, 0, 0, "Short tun packet %d bytes\n", len);
STAT(tun_rx_errors);
return;
}
- if (*(u16 *) (buf + 2) == htons(PKTIP)) // IP
+ if (*(uint16_t *) (buf + 2) == htons(PKTIP)) // IP
processipout(buf, len);
// Else discard.
}
-//
-// Maximum number of actions to complete.
-// This is to avoid sending out too many packets
-// at once.
-#define MAX_ACTIONS 500
-
-int regular_cleanups(void)
+// Handle retries, timeouts. Runs every 1/10th sec, want to ensure
+// that we look at the whole of the tunnel, radius and session tables
+// every second
+static void regular_cleanups(double period)
{
- static sessionidt s = 0; // Next session to check for actions on.
- tunnelidt t;
- int count=0,i;
- u16 r;
- static clockt next_acct = 0;
+ // Next tunnel, radius and session to check for actions on.
+ static tunnelidt t = 0;
+ static int r = 0;
+ static sessionidt s = 0;
+
+ int t_actions = 0;
+ int r_actions = 0;
+ int s_actions = 0;
+
+ int t_slice;
+ int r_slice;
+ int s_slice;
+
+ int i;
int a;
- log(3, 0, 0, 0, "Begin regular cleanup\n");
+ // divide up tables into slices based on the last run
+ t_slice = config->cluster_highest_tunnelid * period;
+ r_slice = (MAXRADIUS - 1) * period;
+ s_slice = config->cluster_highest_sessionid * period;
- for (r = 1; r < MAXRADIUS; r++)
- {
- if (!radius[r].state)
- continue;
- if (radius[r].retry)
- {
- if (radius[r].retry <= TIME)
- radiusretry(r);
- } else
- radius[r].retry = backoff(radius[r].try+1); // Is this really needed? --mo
- }
- for (t = 1; t <= config->cluster_highest_tunnelid; t++)
+ if (t_slice < 1)
+ t_slice = 1;
+ else if (t_slice > config->cluster_highest_tunnelid)
+ t_slice = config->cluster_highest_tunnelid;
+
+ if (r_slice < 1)
+ r_slice = 1;
+ else if (r_slice > (MAXRADIUS - 1))
+ r_slice = MAXRADIUS - 1;
+
+ if (s_slice < 1)
+ s_slice = 1;
+ else if (s_slice > config->cluster_highest_sessionid)
+ s_slice = config->cluster_highest_sessionid;
+
+ LOG(4, 0, 0, "Begin regular cleanup (last %f seconds ago)\n", period);
+
+ for (i = 0; i < t_slice; i++)
{
+ t++;
+ if (t > config->cluster_highest_tunnelid)
+ t = 1;
+
// check for expired tunnels
if (tunnel[t].die && tunnel[t].die <= TIME)
{
STAT(tunnel_timeout);
tunnelkill(t, "Expired");
+ t_actions++;
continue;
}
// check for message resend
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
tunnelsend(c->buf, c->length, t);
c = c->next;
}
+
+ t_actions++;
}
}
// Send hello
{
controlt *c = controlnew(6); // sending HELLO
controladd(c, t, 0); // send the message
- log(3, tunnel[t].ip, 0, t, "Sending HELLO message\n");
+ LOG(3, 0, t, "Sending HELLO message\n");
+ t_actions++;
}
// Check for tunnel changes requested from the CLI
cli_tunnel_actions[t].action = 0;
if (a & CLI_TUN_KILL)
{
- log(2, tunnel[t].ip, 0, t, "Dropping tunnel by CLI\n");
+ LOG(2, 0, t, "Dropping tunnel by CLI\n");
tunnelshutdown(t, "Requested by administrator");
+ t_actions++;
}
}
+ }
+
+ for (i = 0; i < r_slice; i++)
+ {
+ r++;
+ if (r >= MAXRADIUS)
+ r = 1;
+ if (!radius[r].state)
+ continue;
+
+ if (radius[r].retry <= TIME)
+ {
+ radiusretry(r);
+ r_actions++;
+ }
}
- count = 0;
- for (i = 1; i <= config->cluster_highest_sessionid; i++)
+ for (i = 0; i < s_slice; i++)
{
s++;
if (s > config->cluster_highest_sessionid)
s = 1;
- if (!session[s].tunnel) // Session isn't in use
+ if (!session[s].opened) // Session isn't in use
continue;
if (!session[s].die && session[s].ip && !(session[s].flags & SF_IPCP_ACKED))
{
// IPCP has not completed yet. Resend
- log(3, session[s].ip, s, session[s].tunnel, "No ACK for initial IPCP ConfigReq... resending\n");
+ LOG(3, s, session[s].tunnel, "No ACK for initial IPCP ConfigReq... resending\n");
sendipcp(session[s].tunnel, s);
+ s_actions++;
}
// check for expired sessions
if (session[s].die && session[s].die <= TIME)
{
sessionkill(s, "Expired");
- if (++count >= MAX_ACTIONS) break;
+ s_actions++;
continue;
}
// 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;
+ s_actions++;
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);
- if (!q)
- {
- log(3, session[s].ip, s, t, "failed to send ECHO packet.\n");
- continue;
- }
+ 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, session[s].ip, s, session[s].tunnel, "No data in %d seconds, sending LCP ECHO\n",
+ LOG(4, s, session[s].tunnel, "No data in %d seconds, sending LCP ECHO\n",
(int)(time_now - session[s].last_packet));
tunnelsend(b, 24, session[s].tunnel); // send it
- if (++count >= MAX_ACTIONS) break;
+ s_actions++;
}
// Check for actions requested from the CLI
cli_session_actions[s].action = 0;
if (a & CLI_SESS_KILL)
{
- log(2, 0, s, session[s].tunnel, "Dropping session by CLI\n");
+ LOG(2, s, session[s].tunnel, "Dropping session by CLI\n");
sessionshutdown(s, "Requested by administrator");
a = 0; // dead, no need to check for other actions
+ s_actions++;
}
if (a & CLI_SESS_NOSNOOP)
{
- log(2, 0, s, session[s].tunnel, "Unsnooping session by CLI\n");
+ LOG(2, s, session[s].tunnel, "Unsnooping session by CLI\n");
session[s].snoop_ip = 0;
session[s].snoop_port = 0;
+ s_actions++;
send++;
}
else if (a & CLI_SESS_SNOOP)
{
- log(2, 0, s, session[s].tunnel, "Snooping session by CLI (to %s:%d)\n",
- inet_toa(cli_session_actions[s].snoop_ip), cli_session_actions[s].snoop_port);
+ LOG(2, s, session[s].tunnel, "Snooping session by CLI (to %s:%d)\n",
+ fmtaddr(cli_session_actions[s].snoop_ip, 0),
+ cli_session_actions[s].snoop_port);
session[s].snoop_ip = cli_session_actions[s].snoop_ip;
session[s].snoop_port = cli_session_actions[s].snoop_port;
+ s_actions++;
send++;
}
if (a & CLI_SESS_NOTHROTTLE)
{
- log(2, 0, s, session[s].tunnel, "Un-throttling session by CLI\n");
+ LOG(2, s, session[s].tunnel, "Un-throttling session by CLI\n");
throttle_session(s, 0, 0);
+ s_actions++;
send++;
}
else if (a & CLI_SESS_THROTTLE)
{
- log(2, 0, s, session[s].tunnel, "Throttling session by CLI (to %dkb/s up and %dkb/s down)\n",
+ LOG(2, s, session[s].tunnel, "Throttling session by CLI (to %dkb/s up and %dkb/s down)\n",
cli_session_actions[s].throttle_in,
cli_session_actions[s].throttle_out);
throttle_session(s, cli_session_actions[s].throttle_in, cli_session_actions[s].throttle_out);
+ s_actions++;
+ send++;
+ }
+
+ if (a & CLI_SESS_NOFILTER)
+ {
+ LOG(2, s, session[s].tunnel, "Un-filtering session by CLI\n");
+ filter_session(s, 0, 0);
+ s_actions++;
+ send++;
+ }
+ else if (a & CLI_SESS_FILTER)
+ {
+ LOG(2, s, session[s].tunnel, "Filtering session by CLI (in=%d, out=%d)\n",
+ cli_session_actions[s].filter_in,
+ cli_session_actions[s].filter_out);
+
+ filter_session(s, cli_session_actions[s].filter_in, cli_session_actions[s].filter_out);
+ s_actions++;
send++;
}
if (send)
cluster_send_session(s);
-
- if (++count >= MAX_ACTIONS) break;
}
}
- if (*config->accounting_dir && next_acct <= TIME)
- {
- // Dump accounting data
- next_acct = TIME + ACCT_TIME;
- dump_acct_info();
- }
-
- if (count >= MAX_ACTIONS)
- return 1; // Didn't finish!
-
- log(3, 0, 0, 0, "End regular cleanup (%d actions), next in %d seconds\n", count, config->cleanup_interval);
- return 0;
+ LOG(4, 0, 0, "End regular cleanup: checked %d/%d/%d tunnels/radius/sessions; %d/%d/%d actions\n",
+ t_slice, r_slice, s_slice, t_actions, r_actions, s_actions);
}
-
//
// Are we in the middle of a tunnel update, or radius
// requests??
//
-int still_busy(void)
+static int still_busy(void)
{
int i;
+ static time_t stopped_bgp = 0;
static clockt last_talked = 0;
static clockt start_busy_wait = 0;
+
+ if (!config->cluster_iam_master)
+ {
+#ifdef BGP
+ if (bgp_configured)
+ {
+ if (!stopped_bgp)
+ {
+ LOG(1, 0, 0, "Shutting down in %d seconds, stopping BGP...\n", QUIT_DELAY);
+
+ for (i = 0; i < BGP_NUM_PEERS; i++)
+ if (bgp_peers[i].state == Established)
+ bgp_stop(&bgp_peers[i]);
+
+ stopped_bgp = time_now;
+
+ // we don't want to become master
+ cluster_send_ping(0);
+
+ return 1;
+ }
+
+ if (time_now < (stopped_bgp + QUIT_DELAY))
+ return 1;
+ }
+#endif /* BGP */
+
+ return 0;
+ }
+
if (start_busy_wait == 0)
start_busy_wait = TIME;
if (last_talked != TIME)
{
- log(2,0,0,0, "Tunnel %d still has un-acked control messages.\n", i);
+ LOG(2, 0, 0, "Tunnel %d still has un-acked control messages.\n", i);
last_talked = TIME;
}
return 1;
// We stop waiting for radius after BUSY_WAIT_TIME 1/10th seconds
if (abs(TIME - start_busy_wait) > BUSY_WAIT_TIME)
{
- log(1, 0, 0, 0, "Giving up waiting for RADIUS to be empty. Shutting down anyway.\n");
+ LOG(1, 0, 0, "Giving up waiting for RADIUS to be empty. Shutting down anyway.\n");
return 0;
}
if (last_talked != TIME)
{
- log(2,0,0,0, "Radius session %d is still busy (sid %d)\n", i, radius[i].session);
+ LOG(2, 0, 0, "Radius session %d is still busy (sid %d)\n", i, radius[i].session);
last_talked = TIME;
}
return 1;
static int readset_n = 0;
// main loop - gets packets on tun or udp and processes them
-void mainloop(void)
+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, 0, "Beginning of main loop. udpfd=%d, tunfd=%d, cluster_sockfd=%d, controlfd=%d\n",
- udpfd, tunfd, cluster_sockfd, controlfd);
+ 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);
FD_SET(udpfd, &readset);
fd_set w;
int bgp_set[BGP_NUM_PEERS];
#endif /* BGP */
+ int more = 0;
if (config->reload_config)
{
n = select(n + 1, &r, 0, 0, &to);
#endif /* BGP */
- TIME = now();
+ STAT(select_called);
+
+ TIME = now(NULL);
if (n < 0)
{
if (errno == EINTR ||
errno == ECHILD) // EINTR was clobbered by sigchild_handler()
continue;
- log(0, 0, 0, 0, "Error returned from select(): %s\n", strerror(errno));
+ LOG(0, 0, 0, "Error returned from select(): %s\n", strerror(errno));
main_quit++;
break;
}
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);
-
- if (FD_ISSET(cluster_sockfd, &r))
- {
- int size;
- size = recvfrom(cluster_sockfd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen);
- processcluster(buf, size, addr.sin_addr.s_addr);
+ n--;
+ }
+ }
}
- if (FD_ISSET(controlfd, &r))
- processcontrol(buf, recvfrom(controlfd, buf, sizeof(buf), MSG_WAITALL, (void *) &addr, &alen), &addr);
-
+ // CLI connections
if (FD_ISSET(clifd, &r))
{
- struct sockaddr_in addr;
- int sockfd;
- int len = sizeof(addr);
-
- if ((sockfd = accept(clifd, (struct sockaddr *)&addr, &len)) <= 0)
+ int cli;
+
+ alen = sizeof(addr);
+ if ((cli = accept(clifd, (struct sockaddr *)&addr, &alen)) >= 0)
{
- log(0, 0, 0, 0, "accept error: %s\n", strerror(errno));
- continue;
+ cli_do(cli);
+ close(cli);
}
else
- {
- cli_do(sockfd);
- close(sockfd);
- }
+ LOG(0, 0, 0, "accept error: %s\n", strerror(errno));
+
+ n--;
}
- }
- // Runs on every machine (master and slaves).
- if (cluster_sockfd && next_cluster_ping <= TIME)
- {
- // Check to see which of the cluster is still alive..
+#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 */
+
+ for (c = 0; n && c < config->multi_read_count; c++)
+ {
+ // 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--;
+ }
+ }
+
+ // incoming IP
+ if (FD_ISSET(tunfd, &r))
+ {
+ if ((s = read(tunfd, buf, sizeof(buf))) > 0)
+ {
+ processtun(buf, s);
+ tun_pkts++;
+ }
+ else
+ {
+ FD_CLR(tunfd, &r);
+ n--;
+ }
+ }
+
+ // cluster
+ if (FD_ISSET(cluster_sockfd, &r))
+ {
+ 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);
+ more++;
+ }
+ }
+
+ // Runs on every machine (master and slaves).
+ if (cluster_sockfd && next_cluster_ping <= TIME)
+ {
+ // Check to see which of the cluster is still alive..
cluster_send_ping(basetime); // Only does anything if we're a slave
cluster_check_master(); // ditto.
next_cluster_ping = TIME + config->cluster_hb_interval;
}
+ if (!config->cluster_iam_master)
+ continue;
+
// Run token bucket filtering queue..
// Only run it every 1/10th of a second.
- // Runs on all machines both master and slave.
{
static clockt last_run = 0;
if (last_run != TIME)
}
}
- /* Handle timeouts. Make sure that this gets run anyway, even if there was
- * something to read, else under load this will never actually run....
- *
- */
- if (config->cluster_iam_master && next_clean <= time_now)
+ // Handle timeouts, retries etc.
{
- if (regular_cleanups())
- {
- // Did it finish?
- next_clean = time_now + 1 ; // Didn't finish. Check quickly.
- }
- else
+ static double last_clean = 0;
+ double this_clean;
+ double diff;
+
+ TIME = now(&this_clean);
+ diff = this_clean - last_clean;
+
+ // Run during idle time (after we've handled
+ // all incoming packets) or every 1/10th sec
+ if (!more || diff > 0.1)
{
- next_clean = time_now + config->cleanup_interval; // Did. Move to next interval.
+ regular_cleanups(diff);
+ last_clean = this_clean;
}
}
-#ifdef BGP
- for (i = 0; i < BGP_NUM_PEERS; i++)
+ if (*config->accounting_dir)
{
- 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);
+ static clockt next_acct = 0;
+ static clockt next_shut_acct = 0;
+
+ 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);
+ }
}
-#endif /* BGP */
}
// Are we the master and shutting down??
//
// Important!!! We MUST not process any packets past this point!
+ LOG(1, 0, 0, "Clean shutdown complete\n");
}
static void stripdomain(char *host)
}
// Init data structures
-void initdata(int optdebug, char *optconfig)
+static void initdata(int optdebug, char *optconfig)
{
int i;
if (!(_statistics = shared_malloc(sizeof(struct Tstats))))
{
- log(0, 0, 0, 0, "Error doing malloc for _statistics: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Error doing malloc for _statistics: %s\n", strerror(errno));
exit(1);
}
- if (!(config = shared_malloc(sizeof(struct configt))))
+ if (!(config = shared_malloc(sizeof(configt))))
{
- log(0, 0, 0, 0, "Error doing malloc for configuration: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Error doing malloc for configuration: %s\n", strerror(errno));
exit(1);
}
- memset(config, 0, sizeof(struct configt));
+ memset(config, 0, sizeof(configt));
time(&config->start_time);
strncpy(config->config_file, optconfig, strlen(optconfig));
config->debug = optdebug;
config->num_tbfs = MAXTBFS;
config->rl_rate = 28; // 28kbps
+ config->cluster_master_min_adv = 1;
if (!(tunnel = shared_malloc(sizeof(tunnelt) * MAXTUNNEL)))
{
- log(0, 0, 0, 0, "Error doing malloc for tunnels: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Error doing malloc for tunnels: %s\n", strerror(errno));
exit(1);
}
if (!(session = shared_malloc(sizeof(sessiont) * MAXSESSION)))
{
- log(0, 0, 0, 0, "Error doing malloc for sessions: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Error doing malloc for sessions: %s\n", strerror(errno));
exit(1);
}
- if (!(sess_count = shared_malloc(sizeof(sessioncountt) * MAXSESSION)))
+ if (!(sess_local = shared_malloc(sizeof(sessionlocalt) * MAXSESSION)))
{
- log(0, 0, 0, 0, "Error doing malloc for sessions_count: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Error doing malloc for sess_local: %s\n", strerror(errno));
exit(1);
}
if (!(radius = shared_malloc(sizeof(radiust) * MAXRADIUS)))
{
- log(0, 0, 0, 0, "Error doing malloc for radius: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Error doing malloc for radius: %s\n", strerror(errno));
exit(1);
}
if (!(ip_address_pool = shared_malloc(sizeof(ippoolt) * MAXIPPOOL)))
{
- log(0, 0, 0, 0, "Error doing malloc for ip_address_pool: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Error doing malloc for ip_address_pool: %s\n", strerror(errno));
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);
+
#ifdef RINGBUFFER
if (!(ringbuffer = shared_malloc(sizeof(struct Tringbuffer))))
{
- log(0, 0, 0, 0, "Error doing malloc for ringbuffer: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Error doing malloc for ringbuffer: %s\n", strerror(errno));
exit(1);
}
memset(ringbuffer, 0, sizeof(struct Tringbuffer));
if (!(cli_session_actions = shared_malloc(sizeof(struct cli_session_actions) * MAXSESSION)))
{
- log(0, 0, 0, 0, "Error doing malloc for cli session actions: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Error doing malloc for cli session actions: %s\n", strerror(errno));
exit(1);
}
memset(cli_session_actions, 0, sizeof(struct cli_session_actions) * MAXSESSION);
if (!(cli_tunnel_actions = shared_malloc(sizeof(struct cli_tunnel_actions) * MAXSESSION)))
{
- log(0, 0, 0, 0, "Error doing malloc for cli tunnel actions: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Error doing malloc for cli tunnel actions: %s\n", strerror(errno));
exit(1);
}
memset(cli_tunnel_actions, 0, sizeof(struct cli_tunnel_actions) * MAXSESSION);
memset(ip_address_pool, 0, sizeof(ippoolt) * MAXIPPOOL);
// Put all the sessions on the free list marked as undefined.
- for (i = 1; i < MAXSESSION - 1; i++)
+ for (i = 1; i < MAXSESSION; i++)
{
session[i].next = i + 1;
session[i].tunnel = T_UNDEF; // mark it as not filled in.
sessionfree = 1;
// Mark all the tunnels as undefined (waiting to be filled in by a download).
- for (i = 1; i < MAXTUNNEL- 1; i++)
+ for (i = 1; i < MAXTUNNEL; i++)
tunnel[i].state = TUNNELUNDEF; // mark it as not filled in.
if (!*hostname)
#ifdef BGP
if (!(bgp_peers = shared_malloc(sizeof(struct bgp_peer) * BGP_NUM_PEERS)))
{
- log(0, 0, 0, 0, "Error doing malloc for bgp: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Error doing malloc for bgp: %s\n", strerror(errno));
exit(1);
}
#endif /* BGP */
}
-void initiptables(void)
-{
- /* Flush the tables here so that we have a clean slate */
-
-// Not needed. 'nat' is setup by garden.c
-// mangle isn't used (as throttling is done by tbf inhouse).
-}
-
-int assign_ip_address(sessionidt s)
+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;
if (best < 0)
{
- log(0, 0, s, session[s].tunnel, "assign_ip_address(): out of addresses\n");
+ LOG(0, s, session[s].tunnel, "assign_ip_address(): out of addresses\n");
return 0;
}
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 %d from pool\n", reuse ? "Reusing" : "Allocating", best);
+ LOG(4, s, session[s].tunnel, "assign_ip_address(): %s ip address %d from pool\n",
+ reuse ? "Reusing" : "Allocating", best);
return 1;
}
-void free_ip_address(sessionidt s)
+static void free_ip_address(sessionidt s)
{
int i = session[s].ip_pool_index;
+
+ CSTAT(call_free_ip_address);
+
if (!session[s].ip)
return; // what the?
ip_address_pool[i].assigned = 0;
ip_address_pool[i].session = 0;
ip_address_pool[i].last = time_now;
-
-
- CSTAT(call_free_ip_address);
-
}
//
for (i = 0; i < MAXSESSION; ++i)
{
int ipid;
- if (!session[i].ip || !session[i].tunnel)
+ if (!(session[i].opened && session[i].ip))
continue;
ipid = - lookup_ipmap(htonl(session[i].ip));
if (ipid < 1) // Not found in the pool either? good.
continue;
- log(0, 0, i, 0, "Session %d has an IP address (%s) that was marked static, but is in the pool (%d)!\n",
- i, inet_toa(session[i].ip), ipid);
+ LOG(0, i, 0, "Session %d has an IP address (%s) that was marked static, but is in the pool (%d)!\n",
+ i, fmtaddr(session[i].ip, 0), ipid);
// Fall through and process it as part of the pool.
}
if (ipid > MAXIPPOOL || ipid < 0)
{
- log(0, 0, i, 0, "Session %d has a pool IP that's not found in the pool! (%d)\n", i, ipid);
+ LOG(0, i, 0, "Session %d has a pool IP that's not found in the pool! (%d)\n", i, ipid);
ipid = -1;
session[i].ip_pool_index = ipid;
continue;
//
// Fix the address pool to match a changed session.
// (usually when the master sends us an update).
-void fix_address_pool(int sid)
+static void fix_address_pool(int sid)
{
int ipid;
//
// Add a block of addresses to the IP pool to hand out.
//
-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)
++ip_pool_size;
if (ip_pool_size >= MAXIPPOOL)
{
- log(0,0,0,0, "Overflowed IP pool adding %s\n", inet_toa(htonl(addr)) );
+ LOG(0, 0, 0, "Overflowed IP pool adding %s\n", fmtaddr(htonl(addr), 0));
return;
}
}
}
// Initialize the IP address pool
-void initippool()
+static void initippool()
{
FILE *f;
char *p;
if (!(f = fopen(IPPOOLFILE, "r")))
{
- log(0, 0, 0, 0, "Can't load pool file " IPPOOLFILE ": %s\n", strerror(errno));
+ LOG(0, 0, 0, "Can't load pool file " IPPOOLFILE ": %s\n", strerror(errno));
exit(1);
}
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)
{
- log(0, 0, 0, 0, "Invalid address pool IP %s\n", buf);
+ LOG(0, 0, 0, "Invalid address pool IP %s\n", buf);
exit(1);
}
// This entry is for a specific IP only
{
// It's a range
int numbits = 0;
- u32 start = 0, mask = 0;
+ in_addr_t start = 0, mask = 0;
- log(2, 0, 0, 0, "Adding IP address range %s\n", buf);
+ LOG(2, 0, 0, "Adding IP address range %s\n", buf);
*p++ = 0;
if (!*p || !(numbits = atoi(p)))
{
- log(0, 0, 0, 0, "Invalid pool range %s\n", buf);
+ LOG(0, 0, 0, "Invalid pool range %s\n", buf);
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, 0, "Adding route for address pool %s/%u\n", inet_toa(htonl(start)), 32 + mask);
+ LOG(5, 0, 0, "Adding route for address pool %s/%u\n",
+ fmtaddr(htonl(start), 0), 32 + mask);
+
routeset(0, start, mask, 0, 1);
add_to_ip_pool(start, mask);
}
}
fclose(f);
- log(1, 0, 0, 0, "IP address pool is %d addresses\n", ip_pool_size - 1);
+ 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, 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));
+ 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)
- log(0, 0, 0, 0, "Error sending intercept packet: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Error sending intercept packet: %s\n", strerror(errno));
+
STAT(packets_snooped);
}
-void dump_acct_info()
+static int dump_session(FILE **f, sessiont *s)
+{
+ if (!s->opened || !s->ip || !(s->cin || s->cout) || !*s->user || s->walled_garden)
+ return 1;
+
+ if (!*f)
+ {
+ char filename[1024];
+ char timestr[64];
+ time_t now = time(NULL);
+
+ strftime(timestr, sizeof(timestr), "%Y%m%d%H%M%S", localtime(&now));
+ snprintf(filename, sizeof(filename), "%s/%s", config->accounting_dir, timestr);
+
+ if (!(*f = fopen(filename, "w")))
+ {
+ LOG(0, 0, 0, "Can't write accounting info to %s: %s\n", filename, strerror(errno));
+ return 0;
+ }
+
+ 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)
{
- char filename[1024];
- char timestr[64];
- time_t t = time(NULL);
int i;
FILE *f = NULL;
CSTAT(call_dump_acct_info);
- strftime(timestr, 64, "%Y%m%d%H%M%S", localtime(&t));
- snprintf(filename, 1024, "%s/%s", config->accounting_dir, timestr);
-
- for (i = 0; i < MAXSESSION; i++)
+ if (shut_acct_n)
{
- if (!session[i].opened || !session[i].ip || !(session[i].cin || session[i].cout) || !*session[i].user || session[i].walled_garden)
- continue;
- if (!f)
- {
- time_t now = time(NULL);
- if (!(f = fopen(filename, "w")))
- {
- log(0, 0, 0, 0, "Can't write accounting info to %s: %s\n", filename, strerror(errno));
- return ;
- }
- log(3, 0, 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, 0, "Dumping accounting information for %s\n", session[i].user);
- fprintf(f, "%s %s %d %u %u\n",
- session[i].user, // username
- inet_toa(htonl(session[i].ip)), // ip
- (session[i].throttle_in || session[i].throttle_out) ? 2 : 1, // qos
- (u32)session[i].cin, // uptxoctets
- (u32)session[i].cout); // downrxoctets
+ for (i = 0; i < shut_acct_n; i++)
+ dump_session(&f, &shut_acct[i]);
- session[i].pin = session[i].cin = 0;
- session[i].pout = session[i].cout = 0;
+ shut_acct_n = 0;
}
+ if (all)
+ for (i = 1; i <= config->cluster_highest_sessionid; i++)
+ dump_session(&f, &session[i]);
+
if (f)
fclose(f);
}
// Main program
int main(int argc, char *argv[])
{
- int o;
+ int i;
int optdebug = 0;
char *optconfig = CONFIGFILE;
- _program_name = strdup(argv[0]);
-
time(&basetime); // start clock
// scan args
- while ((o = getopt(argc, argv, "dvc:h:")) >= 0)
+ while ((i = getopt(argc, argv, "dvc:h:")) >= 0)
{
- switch (o)
+ switch (i)
{
- case 'd':
- // Double fork to detach from terminal
- if (fork()) exit(0);
- if (fork()) exit(0);
- break;
- case 'v':
- optdebug++;
- break;
- case 'c':
- optconfig = optarg;
- break;
- case 'h':
- snprintf(hostname, sizeof(hostname), "%s", optarg);
- break;
- default:
- printf("Args are:\n"
- "\t-d\tDetach from terminal\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;
+ case 'd':
+ if (fork()) exit(0);
+ setsid();
+ freopen("/dev/null", "r", stdin);
+ freopen("/dev/null", "w", stdout);
+ freopen("/dev/null", "w", stderr);
+ break;
+ case 'v':
+ optdebug++;
+ break;
+ case 'c':
+ optconfig = optarg;
+ break;
+ case 'h':
+ snprintf(hostname, sizeof(hostname), "%s", optarg);
+ break;
+ default:
+ printf("Args are:\n"
+ "\t-d\t\tDetach from terminal\n"
+ "\t-c <file>\tConfig file\n"
+ "\t-h <hostname>\tForce hostname\n"
+ "\t-v\t\tDebug\n");
+
+ return (0);
+ break;
}
}
signal(SIGALRM, sigalrm_handler);
siginterrupt(SIGALRM, 0);
- initiptables();
initplugins();
initdata(optdebug, optconfig);
read_config_file();
init_tbf(config->num_tbfs);
- log(0, 0, 0, 0, "L2TPNS version " VERSION "\n");
- log(0, 0, 0, 0, "Copyright (c) 2003, 2004 Optus Internet Engineering\n");
- log(0, 0, 0, 0, "Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced\n");
+ LOG(0, 0, 0, "L2TPNS version " VERSION "\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;
rlim.rlim_cur = RLIM_INFINITY;
rlim.rlim_max = RLIM_INFINITY;
// Remove the maximum core size
if (setrlimit(RLIMIT_CORE, &rlim) < 0)
- log(0, 0, 0, 0, "Can't set ulimit: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Can't set ulimit: %s\n", strerror(errno));
+
// Make core dumps go to /tmp
chdir("/tmp");
}
if (get_nprocs() < 2)
{
- log(0, 0, 0, 0, "Not using FIFO scheduler, there is only 1 processor in the system.\n");
+ LOG(0, 0, 0, "Not using FIFO scheduler, there is only 1 processor in the system.\n");
config->scheduler_fifo = 0;
}
else
{
if ((ret = sched_setscheduler(0, SCHED_FIFO, ¶ms)) == 0)
{
- log(1, 0, 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
{
- log(0, 0, 0, 0, "Error setting scheduler to FIFO: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Error setting scheduler to FIFO: %s\n", strerror(errno));
config->scheduler_fifo = 0;
}
}
}
/* Set up the cluster communications port. */
- if (cluster_init(config->bind_address) < 0)
+ if (cluster_init() < 0)
exit(1);
#ifdef BGP
signal(SIGPIPE, SIG_IGN);
bgp_setup(config->as_number);
bgp_add_route(config->bind_address, 0xffffffff);
- if (*config->bgp_peer[0])
- bgp_start(&bgp_peers[0], config->bgp_peer[0],
- config->bgp_peer_as[0], 0); /* 0 = routing disabled */
-
- if (*config->bgp_peer[1])
- bgp_start(&bgp_peers[1], config->bgp_peer[1],
- config->bgp_peer_as[1], 0);
+ for (i = 0; i < BGP_NUM_PEERS; i++)
+ {
+ if (config->neighbour[i].name[0])
+ bgp_start(&bgp_peers[i], config->neighbour[i].name,
+ config->neighbour[i].as, config->neighbour[i].keepalive,
+ config->neighbour[i].hold, 0); /* 0 = routing disabled */
+ }
#endif /* BGP */
inittun();
- log(1, 0, 0, 0, "Set up on interface %s\n", config->tundevice);
+ LOG(1, 0, 0, "Set up on interface %s\n", config->tundevice);
initudp();
initrad();
if (config->lock_pages)
{
if (!mlockall(MCL_CURRENT))
- log(1, 0, 0, 0, "Locking pages into memory\n");
+ LOG(1, 0, 0, "Locking pages into memory\n");
else
- log(0, 0, 0, 0, "Can't lock pages: %s\n", strerror(errno));
+ LOG(0, 0, 0, "Can't lock pages: %s\n", strerror(errno));
}
alarm(1);
mainloop();
-#ifdef BGP
- /* try to shut BGP down cleanly; with luck the sockets will be
- writable since we're out of the select */
- {
- int i;
- for (i = 0; i < BGP_NUM_PEERS; i++)
- if (bgp_peers[i].state == Established)
- bgp_stop(&bgp_peers[i]);
- }
-#endif /* BGP */
-
/* remove plugins (so cleanup code gets run) */
plugins_done();
return 0;
}
-void sighup_handler(int junk)
+static void sighup_handler(int sig)
{
if (log_stream && log_stream != stderr)
{
read_config_file();
}
-void sigalrm_handler(int junk)
+static void sigalrm_handler(int sig)
{
// Log current traffic stats
}
-void sigterm_handler(int junk)
+static void sigterm_handler(int sig)
{
- log(1, 0, 0, 0, "Shutting down cleanly\n");
+ LOG(1, 0, 0, "Shutting down cleanly\n");
if (config->save_state)
dump_state();
main_quit++;
}
-void sigquit_handler(int junk)
+static void sigquit_handler(int sig)
{
int i;
- log(1, 0, 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++)
+ LOG(1, 0, 0, "Shutting down without saving sessions\n");
+
+ 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++;
}
-void sigchild_handler(int signal)
+static void sigchild_handler(int sig)
{
while (waitpid(-1, NULL, WNOHANG) > 0)
;
}
-void read_state()
+static void read_state()
{
struct stat sb;
int i;
ippoolt itmp;
FILE *f;
char magic[sizeof(DUMP_MAGIC) - 1];
- u32 buf[2];
+ uint32_t buf[2];
if (!config->save_state)
{
if (sb.st_mtime < (time(NULL) - 60))
{
- log(0, 0, 0, 0, "State file is too old to read, ignoring\n");
+ LOG(0, 0, 0, "State file is too old to read, ignoring\n");
unlink(STATEFILE);
return ;
}
if (!f)
{
- log(0, 0, 0, 0, "Can't read state file: %s\n", strerror(errno));
+ LOG(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");
+ LOG(0, 0, 0, "Bad state file magic\n");
exit(1);
}
- log(1, 0, 0, 0, "Reading state information\n");
+ LOG(1, 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");
+ LOG(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);
+ LOG(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]);
+ LOG(2, 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, "Error reading ip %d from state file: %s\n", i, strerror(errno));
+ LOG(0, 0, 0, "Error reading ip %d from state file: %s\n", i, strerror(errno));
exit(1);
}
if (itmp.address != ip_address_pool[i].address)
{
- log(0, 0, 0, 0, "Mismatched ip %d from state file: pool may only be extended\n", i);
+ LOG(0, 0, 0, "Mismatched ip %d from state file: pool may only be extended\n", i);
exit(1);
}
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");
+ LOG(0, 0, 0, "Error/mismatch reading tunnel header from state file\n");
exit(1);
}
- log(2, 0, 0, 0, "Loading %u tunnels\n", MAXTUNNEL);
+ LOG(2, 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");
+ LOG(0, 0, 0, "Error reading tunnel data from state file\n");
exit(1);
}
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);
+ LOG(3, 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");
+ LOG(0, 0, 0, "Error/mismatch reading session header from state file\n");
exit(1);
}
- log(2, 0, 0, 0, "Loading %u sessions\n", MAXSESSION);
+ LOG(2, 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");
+ LOG(0, 0, 0, "Error reading session data from state file\n");
exit(1);
}
session[i].tbf_out = 0;
if (session[i].opened)
{
- log(2, 0, i, 0, "Loaded active session for user %s\n", session[i].user);
+ LOG(2, i, 0, "Loaded active session for user %s\n", session[i].user);
if (session[i].ip)
sessionsetup(session[i].tunnel, i);
}
}
fclose(f);
- log(0, 0, 0, 0, "Loaded saved state information\n");
+ LOG(0, 0, 0, "Loaded saved state information\n");
}
-void dump_state()
+static void dump_state()
{
FILE *f;
- u32 buf[2];
+ uint32_t buf[2];
if (!config->save_state)
return;
if (!(f = fopen(STATEFILE, "w")))
break;
- log(1, 0, 0, 0, "Dumping state information\n");
+ LOG(1, 0, 0, "Dumping state information\n");
if (fwrite(DUMP_MAGIC, sizeof(DUMP_MAGIC) - 1, 1, f) != 1)
break;
- log(2, 0, 0, 0, "Dumping %u ip addresses\n", ip_pool_size);
+ LOG(2, 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)
if (fwrite(ip_address_pool, sizeof(ippoolt), ip_pool_size, f) != ip_pool_size)
break;
- log(2, 0, 0, 0, "Dumping %u tunnels\n", MAXTUNNEL);
+ LOG(2, 0, 0, "Dumping %u tunnels\n", MAXTUNNEL);
buf[0] = MAXTUNNEL;
buf[1] = sizeof(tunnelt);
if (fwrite(buf, sizeof(buf), 1, f) != 1)
if (fwrite(tunnel, sizeof(tunnelt), MAXTUNNEL, f) != MAXTUNNEL)
break;
- log(2, 0, 0, 0, "Dumping %u sessions\n", MAXSESSION);
+ LOG(2, 0, 0, "Dumping %u sessions\n", MAXSESSION);
buf[0] = MAXSESSION;
buf[1] = sizeof(sessiont);
if (fwrite(buf, sizeof(buf), 1, f) != 1)
}
while (0);
- log(0, 0, 0, 0, "Can't write state information: %s\n", strerror(errno));
+ LOG(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)
+static void build_chap_response(char *challenge, uint8_t id, uint16_t challenge_length, char **challenge_response)
{
MD5_CTX ctx;
*challenge_response = NULL;
if (!*config->l2tpsecret)
{
- log(0, 0, 0, 0, "LNS requested CHAP authentication, but no l2tp secret is defined\n");
+ LOG(0, 0, 0, "LNS requested CHAP authentication, but no l2tp secret is defined\n");
return;
}
- log(4, 0, 0, 0, " Building challenge response for CHAP request\n");
+ LOG(4, 0, 0, " Building challenge response for CHAP request\n");
*challenge_response = (char *)calloc(17, 1);
return 0;
}
-void update_config()
+static void update_config()
{
int i;
static int timeout = 0;
}
if (!config->numradiusservers)
- {
- log(0, 0, 0, 0, "No RADIUS servers defined!\n");
- }
+ LOG(0, 0, 0, "No RADIUS servers defined!\n");
- config->num_radfds = 2 << RADIUS_SHIFT;
+ config->num_radfds = 1 << RADIUS_SHIFT;
// Update plugins
for (i = 0; i < MAXPLUGINS; i++)
{
if (strcmp(config->plugins[i], config->old_plugins[i]) == 0)
continue;
+
if (*config->plugins[i])
{
// Plugin added
}
}
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;
if (!config->cluster_address) config->cluster_address = inet_addr(DEFAULT_MCAST_ADDR);
if (!*config->cluster_interface)
if (config->cluster_hb_timeout < t)
{
- log(0,0,0,0, "Heartbeat timeout %d too low, adjusting to %d\n", config->cluster_hb_timeout, t);
+ LOG(0, 0, 0, "Heartbeat timeout %d too low, adjusting to %d\n", config->cluster_hb_timeout, t);
config->cluster_hb_timeout = t;
}
}
else
{
- log(0, 0, 0, 0, "Can't write to PID file %s: %s\n", config->pid_file, strerror(errno));
+ LOG(0, 0, 0, "Can't write to PID file %s: %s\n", config->pid_file, strerror(errno));
}
}
config->reload_config = 0;
}
-void read_config_file()
+static void read_config_file()
{
FILE *f;
return;
}
- log(3, 0, 0, 0, "Reading config file %s\n", config->config_file);
+ LOG(3, 0, 0, "Reading config file %s\n", config->config_file);
cli_do_file(f);
- log(3, 0, 0, 0, "Done reading config file\n");
+ LOG(3, 0, 0, "Done reading config file\n");
fclose(f);
update_config();
}
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);
- log(3, session[s].ip, s, t, "Doing session setup for session\n");
+ LOG(3, s, t, "Doing session setup for session\n");
- if (!session[s].ip || session[s].ip == 0xFFFFFFFE)
+ if (!session[s].ip)
{
assign_ip_address(s);
if (!session[s].ip)
{
- log(0, 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, 0, s, t, " No IP allocated. Assigned %s from pool\n",
- inet_toa(htonl(session[s].ip)));
+ LOG(3, s, t, " No IP allocated. Assigned %s from pool\n",
+ fmtaddr(htonl(session[s].ip), 0));
}
}
}
+ {
+ int routed = 0;
+
// Add the route for this session.
- //
- // Static IPs need to be routed. Anything else
- // is part of the IP address pool and is already routed,
- // it just needs to be added to the IP cache.
- if (session[s].ip_pool_index == -1) // static ip
- routeset(s, session[s].ip, 0, 0, 1);
- else
- cache_ipmap(session[s].ip, s);
+ for (r = 0; r < MAXROUTE && session[s].route[r].ip; r++)
+ {
+ if ((session[s].ip & session[s].route[r].mask) ==
+ (session[s].route[r].ip & session[s].route[r].mask))
+ routed++;
- for (r = 0; r < MAXROUTE && session[s].route[r].ip; r++)
- routeset(s, session[s].route[r].ip, session[s].route[r].mask, session[s].ip, 1);
+ routeset(s, session[s].route[r].ip, session[s].route[r].mask, 0, 1);
+ }
+
+ // Static IPs need to be routed if not already
+ // convered by a Framed-Route. Anything else is part
+ // of the IP address pool and is already routed, it
+ // just needs to be added to the IP cache.
+ if (session[s].ip_pool_index == -1) // static ip
+ {
+ if (!routed) routeset(s, session[s].ip, 0, 0, 1);
+ }
+ else
+ cache_ipmap(session[s].ip, s);
+ }
if (!session[s].unique_id)
{
// did this session just finish radius?
- log(3, session[s].ip, s, t, "Sending initial IPCP to client\n");
+ LOG(3, s, t, "Sending initial IPCP to client\n");
sendipcp(t, s);
session[s].unique_id = ++last_id;
}
session[s].last_packet = time_now;
- {
- char *sessionip, *tunnelip;
- sessionip = strdup(inet_toa(htonl(session[s].ip)));
- tunnelip = strdup(inet_toa(htonl(tunnel[t].ip)));
- log(2, session[s].ip, s, t, "Login by %s at %s from %s (%s)\n",
- session[s].user, sessionip, tunnelip, tunnel[t].hostname);
- if (sessionip) free(sessionip);
- if (tunnelip) free(tunnelip);
- }
+ LOG(2, s, t, "Login by %s at %s from %s (%s)\n", session[s].user,
+ fmtaddr(htonl(session[s].ip), 0),
+ fmtaddr(htonl(tunnel[t].ip), 1), tunnel[t].hostname);
cluster_send_session(s); // Mark it as dirty, and needing to the flooded to the cluster.
int load_session(sessionidt s, sessiont *new)
{
int i;
+ int newip = 0;
// Sanity checks.
if (new->ip_pool_index >= MAXIPPOOL ||
new->tunnel >= MAXTUNNEL)
{
- log(0,0,s,0, "Strange session update received!\n");
+ LOG(0, s, 0, "Strange session update received!\n");
// FIXME! What to do here?
return 0;
}
session[s].tunnel = new->tunnel; // For logging in cache_ipmap
+ // See if routes/ip cache need updating
+ if (new->ip != session[s].ip)
+ newip++;
- if (new->ip != session[s].ip) // Changed ip. fix up hash tables.
+ for (i = 0; !newip && i < MAXROUTE && (session[s].route[i].ip || new->route[i].ip); i++)
+ if (new->route[i].ip != session[s].route[i].ip ||
+ new->route[i].mask != session[s].route[i].mask)
+ newip++;
+
+ // needs update
+ if (newip)
{
- if (session[s].ip) // If there's an old one, remove it.
+ int routed = 0;
+
+ // remove old routes...
+ for (i = 0; i < MAXROUTE && session[s].route[i].ip; i++)
{
- // Remove any routes if the IP has changed
- for (i = 0; i < MAXROUTE && session[s].route[i].ip; i++)
- {
- routeset(s, session[s].route[i].ip, session[s].route[i].mask, session[s].ip, 0);
- session[s].route[i].ip = 0;
- }
+ if ((session[s].ip & session[s].route[i].mask) ==
+ (session[s].route[i].ip & session[s].route[i].mask))
+ routed++;
+
+ routeset(s, session[s].route[i].ip, session[s].route[i].mask, 0, 0);
+ }
+ // ...ip
+ if (session[s].ip)
+ {
if (session[s].ip_pool_index == -1) // static IP
- routeset(s, session[s].ip, 0, 0, 0);
+ {
+ if (!routed) routeset(s, session[s].ip, 0, 0, 0);
+ }
else // It's part of the IP pool, remove it manually.
uncache_ipmap(session[s].ip);
}
+ routed = 0;
+
+ // add new routes...
+ for (i = 0; i < MAXROUTE && new->route[i].ip; i++)
+ {
+ if ((new->ip & new->route[i].mask) ==
+ (new->route[i].ip & new->route[i].mask))
+ routed++;
+
+ routeset(s, new->route[i].ip, new->route[i].mask, 0, 1);
+ }
+
+ // ...ip
if (new->ip)
{
// If there's a new one, add it.
if (new->ip_pool_index == -1)
- routeset(s, new->ip, 0, 0, 1);
+ {
+ if (!routed) routeset(s, new->ip, 0, 0, 1);
+ }
else
cache_ipmap(new->ip, s);
}
}
- // Update routed networks
- for (i = 0; i < MAXROUTE && (session[s].route[i].ip || new->route[i].ip); i++)
+ // check filters
+ if (new->filter_in && (new->filter_in > MAXFILTER || !ip_filters[new->filter_in - 1].name[0]))
{
- if (new->route[i].ip == session[s].route[i].ip &&
- new->route[i].mask == session[s].route[i].mask)
- continue;
+ LOG(2, s, session[s].tunnel, "Dropping invalid input filter %d\n", (int) new->filter_in);
+ new->filter_in = 0;
+ }
- if (session[s].route[i].ip) // Remove the old one if it exists.
- routeset(s, session[s].route[i].ip, session[s].route[i].mask, session[s].ip, 0);
+ if (new->filter_out && (new->filter_out > MAXFILTER || !ip_filters[new->filter_out - 1].name[0]))
+ {
+ LOG(2, s, session[s].tunnel, "Dropping invalid output filter %d\n", (int) new->filter_out);
+ new->filter_out = 0;
+ }
+
+ if (new->filter_in != session[s].filter_in)
+ {
+ if (session[s].filter_in) ip_filters[session[s].filter_in - 1].used--;
+ if (new->filter_in) ip_filters[new->filter_in - 1].used++;
+ }
- if (new->route[i].ip) // Add the new one if it exists.
- routeset(s, new->route[i].ip, new->route[i].mask, new->ip, 1);
+ if (new->filter_out != session[s].filter_out)
+ {
+ if (session[s].filter_out) ip_filters[session[s].filter_out - 1].used--;
+ if (new->filter_out) ip_filters[new->filter_out - 1].used++;
}
if (new->tunnel && s > config->cluster_highest_sessionid) // Maintain this in the slave. It's used
// for walking the sessions to forward byte counts to the master.
config->cluster_highest_sessionid = s;
- // 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;
return 1;
}
-#ifdef RINGBUFFER
-void ringbuffer_dump(FILE *stream)
-{
- int i = ringbuffer->head;
-
- while (i != ringbuffer->tail)
- {
- if (*ringbuffer->buffer[i].message)
- fprintf(stream, "%d-%s", ringbuffer->buffer[i].level, ringbuffer->buffer[i].message);
- if (++i == ringbuffer->tail) break;
- if (i == RINGBUFFER_SIZE) i = 0;
- }
-}
-#endif
-
-void initplugins()
+static void initplugins()
{
int i;
char path[256] = "";
snprintf(path, 256, PLUGINDIR "/%s.so", plugin_name);
- log(2, 0, 0, 0, "%soading plugin from %s\n", load ? "L" : "Un-l", path);
+ LOG(2, 0, 0, "%soading plugin from %s\n", load ? "L" : "Un-l", path);
return dlopen(path, RTLD_NOW);
}
-void add_plugin(char *plugin_name)
+// plugin callback to get a config value
+static void *getconfig(char *key, enum config_typet type)
+{
+ int i;
+
+ for (i = 0; config_values[i].key; i++)
+ {
+ if (!strcmp(config_values[i].key, key))
+ {
+ if (config_values[i].type == type)
+ return ((void *) config) + config_values[i].offset;
+
+ LOG(1, 0, 0, "plugin requested config item \"%s\" expecting type %d, have type %d\n",
+ key, type, config_values[i].type);
+
+ return 0;
+ }
+ }
+
+ LOG(1, 0, 0, "plugin requested unknown config item \"%s\"\n", key);
+ return 0;
+}
+
+static int add_plugin(char *plugin_name)
{
static struct pluginfuncs funcs = {
_log,
_log_hex,
- inet_toa,
+ fmtaddr,
sessionbyuser,
sessiontbysessionidt,
sessionidtbysessiont,
- sessionkill,
radiusnew,
radiussend,
+ getconfig,
+ sessionkill,
+ throttle_session,
+ cluster_send_session,
};
void *p = open_plugin(plugin_name, 1);
if (!p)
{
- log(1, 0, 0, 0, " Plugin load failed: %s\n", dlerror());
- return;
+ LOG(1, 0, 0, " Plugin load failed: %s\n", dlerror());
+ return -1;
}
if (ll_contains(loaded_plugins, p))
{
dlclose(p);
- return;
+ return 0; // already loaded
}
{
- int *v = dlsym(p, "__plugin_api_version");
+ int *v = dlsym(p, "plugin_api_version");
if (!v || *v != PLUGIN_API_VERSION)
{
- log(1, 0, 0, 0, " Plugin load failed: API version mismatch: %s\n", dlerror());
+ LOG(1, 0, 0, " Plugin load failed: API version mismatch: %s\n", dlerror());
dlclose(p);
- return;
+ return -1;
}
}
{
if (!initfunc(&funcs))
{
- log(1, 0, 0, 0, " Plugin load failed: plugin_init() returned FALSE: %s\n", dlerror());
+ LOG(1, 0, 0, " Plugin load failed: plugin_init() returned FALSE: %s\n", dlerror());
dlclose(p);
- return;
+ return -1;
}
}
void *x;
if (plugin_functions[i] && (x = dlsym(p, plugin_functions[i])))
{
- log(3, 0, 0, 0, " Supports function \"%s\"\n", plugin_functions[i]);
+ LOG(3, 0, 0, " Supports function \"%s\"\n", plugin_functions[i]);
ll_push(plugins[i], x);
}
}
- log(2, 0, 0, 0, " Loaded plugin %s\n", plugin_name);
+ LOG(2, 0, 0, " Loaded plugin %s\n", plugin_name);
+ return 1;
}
static void run_plugin_done(void *plugin)
donefunc();
}
-void remove_plugin(char *plugin_name)
+static int remove_plugin(char *plugin_name)
{
void *p = open_plugin(plugin_name, 0);
- int i;
+ int loaded = 0;
if (!p)
- return;
-
- for (i = 0; i < max_plugin_functions; i++)
- {
- void *x;
- if (plugin_functions[i] && (x = dlsym(p, plugin_functions[i])))
- ll_delete(plugins[i], x);
- }
+ return -1;
if (ll_contains(loaded_plugins, p))
{
+ int i;
+ for (i = 0; i < max_plugin_functions; i++)
+ {
+ void *x;
+ if (plugin_functions[i] && (x = dlsym(p, plugin_functions[i])))
+ ll_delete(plugins[i], x);
+ }
+
ll_delete(loaded_plugins, p);
run_plugin_done(p);
+ loaded = 1;
}
dlclose(p);
- log(2, 0, 0, 0, "Removed plugin %s\n", plugin_name);
+ LOG(2, 0, 0, "Removed plugin %s\n", plugin_name);
+ return loaded;
}
int run_plugins(int plugin_type, void *data)
{
int (*func)(void *data);
- if (!plugins[plugin_type] || plugin_type > max_plugin_functions) return 1;
+
+ if (!plugins[plugin_type] || plugin_type > max_plugin_functions)
+ return PLUGIN_RET_ERROR;
ll_reset(plugins[plugin_type]);
while ((func = ll_next(plugins[plugin_type])))
{
- int rc;
- rc = func(data);
- if (rc == PLUGIN_RET_STOP) return 1;
- if (rc == PLUGIN_RET_ERROR) return 0;
+ int r = func(data);
+
+ if (r != PLUGIN_RET_OK)
+ return r; // stop here
}
- return 1;
+
+ return PLUGIN_RET_OK;
}
-void plugins_done()
+static void plugins_done()
{
void *p;
run_plugin_done(p);
}
-void processcontrol(u8 * buf, int len, struct sockaddr_in *addr)
+static void processcontrol(uint8_t * buf, int len, struct sockaddr_in *addr, int alen)
{
- char *resp;
- int l;
- struct param_control param = { buf, len, ntohl(addr->sin_addr.s_addr), ntohs(addr->sin_port), NULL, 0, 0 };
-
+ struct nsctl request;
+ struct nsctl response;
+ int type = unpack_control(&request, buf, len);
+ int r;
+ void *p;
if (log_stream && config->debug >= 4)
{
- log(4, ntohl(addr->sin_addr.s_addr), 0, 0, "Received ");
- dump_packet(buf, log_stream);
+ if (type < 0)
+ {
+ LOG(4, 0, 0, "Bogus control message from %s (%d)\n",
+ fmtaddr(addr->sin_addr.s_addr, 0), type);
+ }
+ else
+ {
+ LOG(4, 0, 0, "Received [%s] ", fmtaddr(addr->sin_addr.s_addr, 0));
+ dump_control(&request, log_stream);
+ }
}
- resp = calloc(1400, 1);
- l = new_packet(PKT_RESP_ERROR, resp);
- *(int *)(resp + 6) = *(int *)(buf + 6);
+ switch (type)
+ {
+ case NSCTL_REQ_LOAD:
+ if (request.argc != 1)
+ {
+ response.type = NSCTL_RES_ERR;
+ response.argc = 1;
+ response.argv[0] = "name of plugin required";
+ }
+ else if ((r = add_plugin(request.argv[0])) < 1)
+ {
+ response.type = NSCTL_RES_ERR;
+ response.argc = 1;
+ response.argv[0] = !r
+ ? "plugin already loaded"
+ : "error loading plugin";
+ }
+ else
+ {
+ response.type = NSCTL_RES_OK;
+ response.argc = 0;
+ }
- param.type = ntohs(*(short *)(buf + 2));
- param.id = ntohl(*(int *)(buf + 6));
- param.data_length = ntohs(*(short *)(buf + 4)) - 10;
- param.data = (param.data_length > 0) ? (char *)(buf + 10) : NULL;
- param.response = resp;
- param.response_length = l;
+ break;
- run_plugins(PLUGIN_CONTROL, ¶m);
+ case NSCTL_REQ_UNLOAD:
+ if (request.argc != 1)
+ {
+ response.type = NSCTL_RES_ERR;
+ response.argc = 1;
+ response.argv[0] = "name of plugin required";
+ }
+ else if ((r = remove_plugin(request.argv[0])) < 1)
+ {
+ response.type = NSCTL_RES_ERR;
+ response.argc = 1;
+ response.argv[0] = !r
+ ? "plugin not loaded"
+ : "plugin not found";
+ }
+ else
+ {
+ response.type = NSCTL_RES_OK;
+ response.argc = 0;
+ }
- if (param.send_response)
- {
- send_packet(controlfd, ntohl(addr->sin_addr.s_addr), ntohs(addr->sin_port), param.response, param.response_length);
- log(4, ntohl(addr->sin_addr.s_addr), 0, 0, "Sent Control packet response\n");
- }
+ break;
- free(resp);
-}
+ case NSCTL_REQ_HELP:
+ response.type = NSCTL_RES_OK;
+ response.argc = 0;
-/*
- * HACK
- * Go through all of the tunnels and do some cleanups
- */
-void tunnel_clean()
-{
- int i;
+ ll_reset(loaded_plugins);
+ while ((p = ll_next(loaded_plugins)))
+ {
+ char **help = dlsym(p, "plugin_control_help");
+ while (response.argc < 0xff && help && *help)
+ response.argv[response.argc++] = *help++;
+ }
- log(1, 0, 0, 0, "Cleaning tunnels array\n");
+ break;
- for (i = 1; i < MAXTUNNEL; i++)
+ case NSCTL_REQ_CONTROL:
+ {
+ struct param_control param = {
+ config->cluster_iam_master,
+ request.argc,
+ request.argv,
+ 0,
+ NULL,
+ };
+
+ int r = run_plugins(PLUGIN_CONTROL, ¶m);
+
+ if (r == PLUGIN_RET_ERROR)
+ {
+ response.type = NSCTL_RES_ERR;
+ response.argc = 1;
+ response.argv[0] = param.additional
+ ? param.additional
+ : "error returned by plugin";
+ }
+ else if (r == PLUGIN_RET_NOTMASTER)
+ {
+ static char msg[] = "must be run on master: 000.000.000.000";
+
+ response.type = NSCTL_RES_ERR;
+ response.argc = 1;
+ if (config->cluster_master_address)
+ {
+ strcpy(msg + 23, fmtaddr(config->cluster_master_address, 0));
+ response.argv[0] = msg;
+ }
+ else
+ {
+ response.argv[0] = "must be run on master: none elected";
+ }
+ }
+ else if (!(param.response & NSCTL_RESPONSE))
+ {
+ response.type = NSCTL_RES_ERR;
+ response.argc = 1;
+ response.argv[0] = param.response
+ ? "unrecognised response value from plugin"
+ : "unhandled action";
+ }
+ else
+ {
+ response.type = param.response;
+ response.argc = 0;
+ if (param.additional)
+ {
+ response.argc = 1;
+ response.argv[0] = param.additional;
+ }
+ }
+ }
+
+ break;
+
+ default:
+ response.type = NSCTL_RES_ERR;
+ response.argc = 1;
+ response.argv[0] = "error unpacking control packet";
+ }
+
+ buf = calloc(NSCTL_MAX_PKT_SZ, 1);
+ if (!buf)
+ {
+ LOG(2, 0, 0, "Failed to allocate nsctl response\n");
+ return;
+ }
+
+ r = pack_control(buf, NSCTL_MAX_PKT_SZ, response.type, response.argc, response.argv);
+ if (r > 0)
{
- if (!tunnel[i].ip
- || !*tunnel[i].hostname
- || (tunnel[i].state == TUNNELDIE && tunnel[i].die >= time_now))
+ sendto(controlfd, buf, r, 0, (const struct sockaddr *) addr, alen);
+ if (log_stream && config->debug >= 4)
{
- tunnelclear(i);
+ LOG(4, 0, 0, "Sent [%s] ", fmtaddr(addr->sin_addr.s_addr, 0));
+ dump_control(&response, log_stream);
}
}
-}
+ else
+ LOG(2, 0, 0, "Failed to pack nsctl response for %s (%d)\n",
+ fmtaddr(addr->sin_addr.s_addr, 0), r);
-void tunnelclear(tunnelidt t)
-{
- if (!t) return;
- memset(&tunnel[t], 0, sizeof(tunnel[t]));
- tunnel[t].state = TUNNELFREE;
+ free(buf);
}
-tunnelidt new_tunnel()
+static 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);
+ LOG(4, 0, i, "Assigning tunnel ID %d\n", i);
if (i > config->cluster_highest_tunnelid)
config->cluster_highest_tunnelid = i;
return i;
}
}
- log(0, 0, 0, 0, "Can't find a free tunnel! There shouldn't be this many in use!\n");
+ LOG(0, 0, 0, "Can't find a free tunnel! There shouldn't be this many in use!\n");
return 0;
}
{
for (s = 1; s <= config->cluster_highest_sessionid ; ++s)
{
- if (!session[s].tunnel) // Not an in-use session.
+ if (!session[s].opened) // Not an in-use session.
continue;
run_plugins(PLUGIN_NEW_SESSION_MASTER, &session[s]);
// add radius fds
for (i = 0; i < config->num_radfds; i++)
{
- if (!radfds[i]) continue;
FD_SET(radfds[i], &readset);
if (radfds[i] > readset_n)
readset_n = radfds[i];
for (s = 1; s <= config->cluster_highest_sessionid ; ++s)
{
int idle;
- if (!session[s].tunnel)
+ if (!session[s].opened)
continue;
idle = time_now - session[s].last_packet;
for (s = 1; s <= config->cluster_highest_sessionid ; ++s)
{
int open = 0, d;
- if (!session[s].tunnel)
+ if (!session[s].opened)
continue;
d = time_now - session[s].opened;
*
* Based on code from rp-l2tpd by Roaring Penguin Software Inc.
*/
-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);
if (hidden_length > length - 8)
{
- log(1, 0, s, t, "Hidden length %d too long in AVP of length %d\n", (int) hidden_length, (int) length);
+ LOG(1, s, t, "Hidden length %d too long in AVP of length %d\n", (int) hidden_length, (int) length);
return 0;
}
return hidden_length + 6;
}
+static int ip_filter_port(ip_filter_portt *p, uint16_t port)
+{
+ switch (p->op)
+ {
+ case FILTER_PORT_OP_EQ: return port == p->port;
+ case FILTER_PORT_OP_NEQ: return port != p->port;
+ case FILTER_PORT_OP_GT: return port > p->port;
+ case FILTER_PORT_OP_LT: return port < p->port;
+ case FILTER_PORT_OP_RANGE: return port >= p->port && port <= p->port2;
+ }
+
+ return 0;
+}
+
+static int ip_filter_flag(uint8_t op, uint8_t sflags, uint8_t cflags, uint8_t flags)
+{
+ switch (op)
+ {
+ case FILTER_FLAG_OP_ANY:
+ return (flags & sflags) || (~flags & cflags);
+
+ case FILTER_FLAG_OP_ALL:
+ return (flags & sflags) == sflags && (~flags & cflags) == cflags;
+
+ case FILTER_FLAG_OP_EST:
+ return (flags & (TCP_FLAG_ACK|TCP_FLAG_RST)) && (~flags & TCP_FLAG_SYN);
+ }
+
+ return 0;
+}
+
+int ip_filter(uint8_t *buf, int len, uint8_t filter)
+{
+ 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) != 4) // IPv4
+ return 0;
+
+ frag_offset = ntohs(*(uint16_t *) (buf + 6)) & 0x1fff;
+ proto = buf[9];
+ 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) * 4; // length of IP header
+ if (len < l + 4) // ports
+ return 0;
+
+ src_port = ntohs(*(uint16_t *) (buf + l));
+ dst_port = ntohs(*(uint16_t *) (buf + l + 2));
+ if (proto == IPPROTO_TCP)
+ {
+ if (len < l + 14) // flags
+ return 0;
+
+ flags = buf[l + 13] & 0x3f;
+ }
+ }
+
+ for (rule = ip_filters[filter].rules; rule->action; rule++)
+ {
+ if (rule->proto != IPPROTO_IP && proto != rule->proto)
+ continue;
+
+ if (rule->src_wild != INADDR_BROADCAST &&
+ (src_ip & ~rule->src_wild) != (rule->src_ip & ~rule->src_wild))
+ continue;
+
+ if (rule->dst_wild != INADDR_BROADCAST &&
+ (dst_ip & ~rule->dst_wild) != (rule->dst_ip & ~rule->dst_wild))
+ continue;
+
+ if (frag_offset)
+ {
+ if (!rule->frag || rule->action == FILTER_ACTION_DENY)
+ continue;
+ }
+ else
+ {
+ if (rule->frag)
+ continue;
+
+ if (proto == IPPROTO_TCP || proto == IPPROTO_UDP)
+ {
+ if (rule->src_ports.op && !ip_filter_port(&rule->src_ports, src_port))
+ continue;
+
+ if (rule->dst_ports.op && !ip_filter_port(&rule->dst_ports, dst_port))
+ continue;
+
+ if (proto == IPPROTO_TCP && rule->tcp_flag_op &&
+ !ip_filter_flag(rule->tcp_flag_op, rule->tcp_sflags, rule->tcp_cflags, flags))
+ continue;
+ }
+ }
+
+ // matched
+ rule->counter++;
+ return rule->action == FILTER_ACTION_PERMIT;
+ }
+
+ // default deny
+ return 0;
+}
projects / l2tpns.git / blobdiff