3 // Copyright (c) 2003, 2004 Optus Internet Engineering
4 // Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced
7 char const *cvs_id_l2tpns
= "$Id: l2tpns.c,v 1.23 2004-08-26 04:43:52 fred_nerk Exp $";
13 #include <linux/if_tun.h>
18 #include <net/route.h>
21 #include <netinet/in.h>
26 #include <sys/ioctl.h>
27 #include <sys/socket.h>
30 #include <sys/resource.h>
38 #include <sys/sysinfo.h>
46 #include "constants.h"
52 struct configt
*config
= NULL
; // all configuration
53 int tunfd
= -1; // tun interface file handle. (network device)
54 int udpfd
= -1; // UDP file handle
55 int controlfd
= -1; // Control signal handle
56 int snoopfd
= -1; // UDP file handle for sending out intercept data
57 int *radfds
= NULL
; // RADIUS requests file handles
58 int ifrfd
= -1; // File descriptor for routing, etc
59 time_t basetime
= 0; // base clock
60 char hostname
[1000] = ""; // us.
61 int tunidx
; // ifr_ifindex of tun device
62 u32 sessionid
= 0; // session id for radius accounting
63 int syslog_log
= 0; // are we logging to syslog
64 FILE *log_stream
= NULL
; // file handle for direct logging (i.e. direct into file, not via syslog).
65 extern int cluster_sockfd
; // Intra-cluster communications socket.
66 u32 last_sid
= 0; // Last used PPP SID. Can I kill this?? -- mo
67 int clifd
= 0; // Socket listening for CLI connections.
69 struct cli_session_actions
*cli_session_actions
= NULL
; // Pending session changes requested by CLI
70 struct cli_tunnel_actions
*cli_tunnel_actions
= NULL
; // Pending tunnel changes required by CLI
72 static void *ip_hash
[256]; // Mapping from IP address to session structures.
74 u32 udp_tx
= 0, udp_rx
= 0, udp_rx_pkt
= 0; // Global traffic counters.
75 u32 eth_tx
= 0, eth_rx
= 0, eth_rx_pkt
= 0;
76 u32 ip_pool_size
= 1; // Size of the pool of addresses used for dynamic address allocation.
77 time_t time_now
= 0; // Current time in seconds since epoch.
78 char time_now_string
[64] = {0}; // Current time as a string.
79 char main_quit
= 0; // True if we're in the process of exiting.
80 char *_program_name
= NULL
;
81 linked_list
*loaded_plugins
;
82 linked_list
*plugins
[MAX_PLUGIN_TYPES
];
86 struct bgp_peer
*bgp_peers
= 0;
87 struct bgp_route_list
*bgp_routes
= 0;
88 int bgp_configured
= 0;
91 #define membersize(STRUCT, MEMBER) sizeof(((STRUCT *)0)->MEMBER)
92 #define CONFIG(NAME, MEMBER, TYPE) { NAME, offsetof(struct configt, MEMBER), membersize(struct configt, MEMBER), TYPE }
94 struct config_descriptt config_values
[] = {
95 CONFIG("debug", debug
, INT
),
96 CONFIG("log_file", log_filename
, STRING
),
97 CONFIG("pid_file", pid_file
, STRING
),
98 CONFIG("l2tp_secret", l2tpsecret
, STRING
),
99 CONFIG("primary_dns", default_dns1
, IP
),
100 CONFIG("secondary_dns", default_dns2
, IP
),
101 CONFIG("save_state", save_state
, BOOL
),
102 CONFIG("primary_radius", radiusserver
[0], IP
),
103 CONFIG("secondary_radius", radiusserver
[1], IP
),
104 CONFIG("primary_radius_port",radiusport
[0], SHORT
),
105 CONFIG("secondary_radius_port",radiusport
[1], SHORT
),
106 CONFIG("radius_accounting", radius_accounting
, BOOL
),
107 CONFIG("radius_secret", radiussecret
, STRING
),
108 CONFIG("bind_address", bind_address
, IP
),
109 CONFIG("send_garp", send_garp
, BOOL
),
110 CONFIG("throttle_speed", rl_rate
, UNSIGNED_LONG
),
111 CONFIG("accounting_dir", accounting_dir
, STRING
),
112 CONFIG("setuid", target_uid
, INT
),
113 CONFIG("dump_speed", dump_speed
, BOOL
),
114 CONFIG("cleanup_interval", cleanup_interval
, INT
),
115 CONFIG("multi_read_count", multi_read_count
, INT
),
116 CONFIG("scheduler_fifo", scheduler_fifo
, BOOL
),
117 CONFIG("lock_pages", lock_pages
, BOOL
),
118 CONFIG("icmp_rate", icmp_rate
, INT
),
119 CONFIG("cluster_address", cluster_address
, IP
),
120 CONFIG("cluster_interface", cluster_interface
, STRING
),
121 CONFIG("cluster_hb_interval", cluster_hb_interval
, INT
),
122 CONFIG("cluster_hb_timeout", cluster_hb_timeout
, INT
),
124 CONFIG("as_number", as_number
, SHORT
),
125 CONFIG("bgp_peer1", bgp_peer
[0], STRING
),
126 CONFIG("bgp_peer1_as", bgp_peer_as
[0], SHORT
),
127 CONFIG("bgp_peer2", bgp_peer
[1], STRING
),
128 CONFIG("bgp_peer2_as", bgp_peer_as
[1], SHORT
),
133 char *plugin_functions
[] = {
140 "plugin_new_session",
141 "plugin_kill_session",
143 "plugin_radius_response",
144 "plugin_become_master",
145 "plugin_new_session_master",
148 #define max_plugin_functions (sizeof(plugin_functions) / sizeof(char *))
150 tunnelt
*tunnel
= NULL
; // Array of tunnel structures.
151 sessiont
*session
= NULL
; // Array of session structures.
152 sessioncountt
*sess_count
= NULL
; // Array of partial per-session traffic counters.
153 radiust
*radius
= NULL
; // Array of radius structures.
154 ippoolt
*ip_address_pool
= NULL
; // Array of dynamic IP addresses.
155 controlt
*controlfree
= 0;
156 struct Tstats
*_statistics
= NULL
;
158 struct Tringbuffer
*ringbuffer
= NULL
;
161 void sigalrm_handler(int);
162 void sighup_handler(int);
163 void sigterm_handler(int);
164 void sigquit_handler(int);
165 void sigchild_handler(int);
166 void read_config_file();
170 tunnelidt
new_tunnel();
171 void update_config();
173 static void cache_ipmap(ipt ip
, int s
);
174 static void uncache_ipmap(ipt ip
);
176 // return internal time (10ths since process startup)
181 return (t
.tv_sec
- basetime
) * 10 + t
.tv_usec
/ 100000 + 1;
184 // work out a retry time based on try number
185 // This is a straight bounded exponential backoff.
186 // Maximum re-try time is 32 seconds. (2^5).
187 clockt
backoff(u8
try)
189 if (try > 5) try = 5; // max backoff
190 return now() + 10 * (1 << try);
195 // Log a debug message.
197 void _log(int level
, ipt address
, sessionidt s
, tunnelidt t
, const char *format
, ...)
199 static char message
[65536] = {0};
200 static char message2
[65536] = {0};
206 if (++ringbuffer
->tail
>= RINGBUFFER_SIZE
)
207 ringbuffer
->tail
= 0;
208 if (ringbuffer
->tail
== ringbuffer
->head
)
209 if (++ringbuffer
->head
>= RINGBUFFER_SIZE
)
210 ringbuffer
->head
= 0;
212 ringbuffer
->buffer
[ringbuffer
->tail
].level
= level
;
213 ringbuffer
->buffer
[ringbuffer
->tail
].address
= address
;
214 ringbuffer
->buffer
[ringbuffer
->tail
].session
= s
;
215 ringbuffer
->buffer
[ringbuffer
->tail
].tunnel
= t
;
216 va_start(ap
, format
);
217 vsnprintf(ringbuffer
->buffer
[ringbuffer
->tail
].message
, 4095, format
, ap
);
222 if (config
->debug
< level
) return;
224 va_start(ap
, format
);
227 vsnprintf(message2
, 65535, format
, ap
);
228 snprintf(message
, 65535, "%s %02d/%02d %s", time_now_string
, t
, s
, message2
);
229 fprintf(log_stream
, "%s", message
);
233 vsnprintf(message2
, 65535, format
, ap
);
234 snprintf(message
, 65535, "%02d/%02d %s", t
, s
, message2
);
235 syslog(level
+ 2, message
); // We don't need LOG_EMERG or LOG_ALERT
240 void _log_hex(int level
, ipt address
, sessionidt s
, tunnelidt t
, const char *title
, const char *data
, int maxsize
)
243 const u8
*d
= (const u8
*)data
;
245 if (config
->debug
< level
) return;
247 // No support for log_hex to syslog
250 log(level
, address
, s
, t
, "%s (%d bytes):\n", title
, maxsize
);
251 setvbuf(log_stream
, NULL
, _IOFBF
, 16384);
253 for (i
= 0; i
< maxsize
; )
255 fprintf(log_stream
, "%4X: ", i
);
256 for (j
= i
; j
< maxsize
&& j
< (i
+ 16); j
++)
258 fprintf(log_stream
, "%02X ", d
[j
]);
260 fputs(": ", log_stream
);
263 for (; j
< i
+ 16; j
++)
265 fputs(" ", log_stream
);
267 fputs(": ", log_stream
);
270 fputs(" ", log_stream
);
271 for (j
= i
; j
< maxsize
&& j
< (i
+ 16); j
++)
273 if (d
[j
] >= 0x20 && d
[j
] < 0x7f && d
[j
] != 0x20)
274 fputc(d
[j
], log_stream
);
276 fputc('.', log_stream
);
279 fputs(" ", log_stream
);
283 fputs("\n", log_stream
);
287 setbuf(log_stream
, NULL
);
294 // This adds it to the routing table, advertises it
295 // via iBGP if enabled, and stuffs it into the
296 // 'sessionbyip' cache.
298 // 'ip' and 'mask' must be in _host_ order.
300 void routeset(sessionidt s
, ipt ip
, ipt mask
, ipt gw
, u8 add
)
305 if (!mask
) mask
= 0xffffffff;
307 ip
&= mask
; // Force the ip to be the first one in the route.
309 memset(&r
, 0, sizeof(r
));
310 r
.rt_dev
= config
->tundevice
;
311 r
.rt_dst
.sa_family
= AF_INET
;
312 *(u32
*) & (((struct sockaddr_in
*) &r
.rt_dst
)->sin_addr
.s_addr
) = htonl(ip
);
313 r
.rt_gateway
.sa_family
= AF_INET
;
314 *(u32
*) & (((struct sockaddr_in
*) &r
.rt_gateway
)->sin_addr
.s_addr
) = htonl(gw
);
315 r
.rt_genmask
.sa_family
= AF_INET
;
316 *(u32
*) & (((struct sockaddr_in
*) &r
.rt_genmask
)->sin_addr
.s_addr
) = htonl(mask
);
317 r
.rt_flags
= (RTF_UP
| RTF_STATIC
);
319 r
.rt_flags
|= RTF_GATEWAY
;
320 else if (mask
== 0xffffffff)
321 r
.rt_flags
|= RTF_HOST
;
323 log(1, ip
, 0, 0, "Route %s %u.%u.%u.%u/%u.%u.%u.%u %u.%u.%u.%u\n",
325 ip
>> 24, ip
>> 16 & 0xff, ip
>> 8 & 0xff, ip
& 0xff,
326 mask
>> 24, mask
>> 16 & 0xff, mask
>> 8 & 0xff, mask
& 0xff,
327 gw
>> 24, gw
>> 16 & 0xff, gw
>> 8 & 0xff, gw
& 0xff);
329 if (ioctl(ifrfd
, add
? SIOCADDRT
: SIOCDELRT
, (void *) &r
) < 0)
330 log(0, 0, 0, 0, "routeset() error in ioctl: %s\n", strerror(errno
));
334 bgp_add_route(htonl(ip
), htonl(mask
));
336 bgp_del_route(htonl(ip
), htonl(mask
));
339 // Add/Remove the IPs to the 'sessionbyip' cache.
340 // Note that we add the zero address in the case of
341 // a network route. Roll on CIDR.
343 // Note that 's == 0' implies this is the address pool.
344 // We still cache it here, because it will pre-fill
345 // the malloc'ed tree.
349 if (!add
) // Are we deleting a route?
350 s
= 0; // Caching the session as '0' is the same as uncaching.
352 for (i
= ip
; (i
&mask
) == (ip
&mask
) ; ++i
)
358 // Set up TUN interface
362 struct sockaddr_in sin
= {0};
363 memset(&ifr
, 0, sizeof(ifr
));
364 ifr
.ifr_flags
= IFF_TUN
;
366 tunfd
= open(TUNDEVICE
, O_RDWR
);
369 log(0, 0, 0, 0, "Can't open %s: %s\n", TUNDEVICE
, strerror(errno
));
373 int flags
= fcntl(tunfd
, F_GETFL
, 0);
374 fcntl(tunfd
, F_SETFL
, flags
| O_NONBLOCK
);
376 if (ioctl(tunfd
, TUNSETIFF
, (void *) &ifr
) < 0)
378 log(0, 0, 0, 0, "Can't set tun interface: %s\n", strerror(errno
));
381 assert(strlen(ifr
.ifr_name
) < sizeof(config
->tundevice
));
382 strncpy(config
->tundevice
, ifr
.ifr_name
, sizeof(config
->tundevice
) - 1);
383 ifrfd
= socket(PF_INET
, SOCK_DGRAM
, IPPROTO_IP
);
385 sin
.sin_family
= AF_INET
;
386 sin
.sin_addr
.s_addr
= config
->bind_address
? config
->bind_address
: 0x01010101; // 1.1.1.1
387 memcpy(&ifr
.ifr_addr
, &sin
, sizeof(struct sockaddr
));
389 if (ioctl(ifrfd
, SIOCSIFADDR
, (void *) &ifr
) < 0)
391 log(0, 0, 0, 0, "Error setting tun address: %s\n", strerror(errno
));
394 /* Bump up the qlen to deal with bursts from the network */
396 if (ioctl(ifrfd
, SIOCSIFTXQLEN
, (void *) &ifr
) < 0)
398 log(0, 0, 0, 0, "Error setting tun queue length: %s\n", strerror(errno
));
401 ifr
.ifr_flags
= IFF_UP
;
402 if (ioctl(ifrfd
, SIOCSIFFLAGS
, (void *) &ifr
) < 0)
404 log(0, 0, 0, 0, "Error setting tun flags: %s\n", strerror(errno
));
407 if (ioctl(ifrfd
, SIOCGIFINDEX
, (void *) &ifr
) < 0)
409 log(0, 0, 0, 0, "Error setting tun ifindex: %s\n", strerror(errno
));
412 tunidx
= ifr
.ifr_ifindex
;
419 struct sockaddr_in addr
;
422 memset(&addr
, 0, sizeof(addr
));
423 addr
.sin_family
= AF_INET
;
424 addr
.sin_port
= htons(L2TPPORT
);
425 addr
.sin_addr
.s_addr
= config
->bind_address
;
426 udpfd
= socket(AF_INET
, SOCK_DGRAM
, IPPROTO_UDP
);
427 setsockopt(udpfd
, SOL_SOCKET
, SO_REUSEADDR
, &on
, sizeof(on
));
429 int flags
= fcntl(udpfd
, F_GETFL
, 0);
430 fcntl(udpfd
, F_SETFL
, flags
| O_NONBLOCK
);
432 if (bind(udpfd
, (void *) &addr
, sizeof(addr
)) < 0)
434 log(0, 0, 0, 0, "Error in UDP bind: %s\n", strerror(errno
));
437 snoopfd
= socket(AF_INET
, SOCK_DGRAM
, IPPROTO_UDP
);
440 memset(&addr
, 0, sizeof(addr
));
441 addr
.sin_family
= AF_INET
;
442 addr
.sin_port
= htons(1702);
443 controlfd
= socket(AF_INET
, SOCK_DGRAM
, 17);
444 setsockopt(controlfd
, SOL_SOCKET
, SO_REUSEADDR
, &on
, sizeof(on
));
445 if (bind(controlfd
, (void *) &addr
, sizeof(addr
)) < 0)
447 log(0, 0, 0, 0, "Error in control bind: %s\n", strerror(errno
));
453 // Find session by IP, < 1 for not found
455 // Confusingly enough, this 'ip' must be
456 // in _network_ order. This being the common
457 // case when looking it up from IP packet headers.
459 // We actually use this cache for two things.
460 // #1. For used IP addresses, this maps to the
461 // session ID that it's used by.
462 // #2. For un-used IP addresses, this maps to the
463 // index into the pool table that contains that
467 int lookup_ipmap(ipt ip
)
470 char **d
= (char **) ip_hash
;
473 if (!(d
= (char **) d
[(size_t) *a
++])) return 0;
474 if (!(d
= (char **) d
[(size_t) *a
++])) return 0;
475 if (!(d
= (char **) d
[(size_t) *a
++])) return 0;
477 s
= (ipt
) d
[(size_t) *a
];
481 sessionidt
sessionbyip(ipt ip
)
483 int s
= lookup_ipmap(ip
);
484 CSTAT(call_sessionbyip
);
486 if (s
> 0 && s
< MAXSESSION
&& session
[s
].tunnel
)
492 // Take an IP address in HOST byte order and
493 // add it to the sessionid by IP cache.
495 // (It's actually cached in network order)
497 static void cache_ipmap(ipt ip
, int s
)
499 ipt nip
= htonl(ip
); // MUST be in network order. I.e. MSB must in be ((char*)(&ip))[0]
501 char **d
= (char **) ip_hash
;
504 for (i
= 0; i
< 3; i
++)
506 if (!d
[(size_t) a
[i
]])
508 if (!(d
[(size_t) a
[i
]] = calloc(256, sizeof (void *))))
512 d
= (char **) d
[(size_t) a
[i
]];
515 d
[(size_t) a
[3]] = (char *)((int)s
);
518 log(4, ip
, s
, session
[s
].tunnel
, "Caching ip address %s\n", inet_toa(nip
));
520 log(4, ip
, 0, 0, "Un-caching ip address %s\n", inet_toa(nip
));
521 // else a map to an ip pool index.
524 static void uncache_ipmap(ipt ip
)
526 cache_ipmap(ip
, 0); // Assign it to the NULL session.
530 // CLI list to dump current ipcache.
532 int cmd_show_ipcache(struct cli_def
*cli
, char *command
, char **argv
, int argc
)
534 char **d
= (char **) ip_hash
, **e
, **f
, **g
;
538 if (CLI_HELP_REQUESTED
)
539 return CLI_HELP_NO_ARGS
;
541 cli_print(cli
, "%7s %s", "Sess#", "IP Address");
543 for (i
= 0; i
< 256; ++i
)
548 for (j
= 0; j
< 256; ++j
)
553 for (k
= 0; k
< 256; ++k
)
558 for (l
= 0; l
< 256; ++l
)
562 cli_print(cli
, "%7d %d.%d.%d.%d", (int) g
[l
], i
, j
, k
, l
);
568 cli_print(cli
, "%d entries in cache", count
);
573 // Find session by username, 0 for not found
574 // walled garden users aren't authenticated, so the username is
575 // reasonably useless. Ignore them to avoid incorrect actions
577 // This is VERY inefficent. Don't call it often. :)
579 sessionidt
sessionbyuser(char *username
)
582 CSTAT(call_sessionbyuser
);
584 for (s
= 1; s
< MAXSESSION
; ++s
)
586 if (session
[s
].walled_garden
)
587 continue; // Skip walled garden users.
589 if (!strncmp(session
[s
].user
, username
, 128))
593 return 0; // Not found.
596 void send_garp(ipt ip
)
602 s
= socket(PF_INET
, SOCK_DGRAM
, 0);
605 log(0, 0, 0, 0, "Error creating socket for GARP: %s\n", strerror(errno
));
608 memset(&ifr
, 0, sizeof(ifr
));
609 strncpy(ifr
.ifr_name
, "eth0", sizeof(ifr
.ifr_name
) - 1);
610 if (ioctl(s
, SIOCGIFHWADDR
, &ifr
) < 0)
612 log(0, 0, 0, 0, "Error getting eth0 hardware address for GARP: %s\n", strerror(errno
));
616 memcpy(mac
, &ifr
.ifr_hwaddr
.sa_data
, 6*sizeof(char));
617 if (ioctl(s
, SIOCGIFINDEX
, &ifr
) < 0)
619 log(0, 0, 0, 0, "Error getting eth0 interface index for GARP: %s\n", strerror(errno
));
624 sendarp(ifr
.ifr_ifindex
, mac
, ip
);
627 // Find session by username, 0 for not found
628 sessiont
*sessiontbysessionidt(sessionidt s
)
630 if (!s
|| s
> MAXSESSION
) return NULL
;
634 sessionidt
sessionidtbysessiont(sessiont
*s
)
636 sessionidt val
= s
-session
;
637 if (s
< session
|| val
> MAXSESSION
) return 0;
641 // actually send a control message for a specific tunnel
642 void tunnelsend(u8
* buf
, u16 l
, tunnelidt t
)
644 struct sockaddr_in addr
;
646 CSTAT(call_tunnelsend
);
650 static int backtrace_count
= 0;
651 log(0, 0, 0, t
, "tunnelsend called with 0 as tunnel id\n");
652 STAT(tunnel_tx_errors
);
653 log_backtrace(backtrace_count
, 5)
659 static int backtrace_count
= 0;
660 log(1, 0, 0, t
, "Error sending data out tunnel: no remote endpoint (tunnel not set up)\n");
661 log_backtrace(backtrace_count
, 5)
662 STAT(tunnel_tx_errors
);
665 memset(&addr
, 0, sizeof(addr
));
666 addr
.sin_family
= AF_INET
;
667 *(u32
*) & addr
.sin_addr
= htonl(tunnel
[t
].ip
);
668 addr
.sin_port
= htons(tunnel
[t
].port
);
670 // sequence expected, if sequence in message
671 if (*buf
& 0x08) *(u16
*) (buf
+ ((*buf
& 0x40) ? 10 : 8)) = htons(tunnel
[t
].nr
);
673 // If this is a control message, deal with retries
676 tunnel
[t
].last
= time_now
; // control message sent
677 tunnel
[t
].retry
= backoff(tunnel
[t
].try); // when to resend
678 if (tunnel
[t
].try > 1)
680 STAT(tunnel_retries
);
681 log(3, tunnel
[t
].ip
, 0, t
, "Control message resend try %d\n", tunnel
[t
].try);
685 if (sendto(udpfd
, buf
, l
, 0, (void *) &addr
, sizeof(addr
)) < 0)
687 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",
688 strerror(errno
), udpfd
, buf
, l
, inet_ntoa(addr
.sin_addr
));
689 STAT(tunnel_tx_errors
);
693 log_hex(5, "Send Tunnel Data", buf
, l
);
694 STAT(tunnel_tx_packets
);
695 INC_STAT(tunnel_tx_bytes
, l
);
699 // Tiny helper function to write data to
702 int tun_write(u8
* data
, int size
)
704 return write(tunfd
, data
, size
);
707 // process outgoing (to tunnel) IP
709 void processipout(u8
* buf
, int len
)
716 char * data
= buf
; // Keep a copy of the originals.
721 CSTAT(call_processipout
);
723 if (len
< MIN_IP_SIZE
)
725 log(1, 0, 0, 0, "Short IP, %d bytes\n", len
);
726 STAT(tunnel_tx_errors
);
731 log(1, 0, 0, 0, "Oversize IP packet %d bytes\n", len
);
732 STAT(tunnel_tx_errors
);
736 // Skip the tun header
740 // Got an IP header now
741 if (*(u8
*)(buf
) >> 4 != 4)
743 log(1, 0, 0, 0, "IP: Don't understand anything except IPv4\n");
747 ip
= *(u32
*)(buf
+ 16);
748 if (!(s
= sessionbyip(ip
)))
750 // Is this a packet for a session that doesn't exist?
751 static int rate
= 0; // Number of ICMP packets we've sent this second.
752 static int last
= 0; // Last time we reset the ICMP packet counter 'rate'.
754 if (last
!= time_now
)
760 if (rate
++ < config
->icmp_rate
) // Only send a max of icmp_rate per second.
762 log(4, 0, 0, 0, "IP: Sending ICMP host unreachable to %s\n", inet_toa(*(u32
*)(buf
+ 12)));
763 host_unreachable(*(u32
*)(buf
+ 12), *(u16
*)(buf
+ 4), ip
, buf
, (len
< 64) ? 64 : len
);
767 t
= session
[s
].tunnel
;
772 // Are we throttling this session?
773 if (config
->cluster_iam_master
)
774 tbf_queue_packet(sp
->tbf_out
, data
, size
);
776 master_throttle_packet(sp
->tbf_out
, data
, size
);
779 else if (sp
->walled_garden
&& !config
->cluster_iam_master
)
781 // We are walled-gardening this
782 master_garden_packet(s
, data
, size
);
786 // Snooping this session, send it to intercept box
787 if (sp
->snoop_ip
&& sp
->snoop_port
)
788 snoop_send_packet(buf
, len
, sp
->snoop_ip
, sp
->snoop_port
);
790 log(5, session
[s
].ip
, s
, t
, "Ethernet -> Tunnel (%d bytes)\n", len
);
792 // Add on L2TP header
794 u8
*p
= makeppp(b
, sizeof(b
), buf
, len
, t
, s
, PPPIP
);
797 log(3, session
[s
].ip
, s
, t
, "failed to send packet in processipout.\n");
800 tunnelsend(b
, len
+ (p
-b
), t
); // send it...
803 sp
->cout
+= len
; // byte count
804 sp
->total_cout
+= len
; // byte count
807 sess_count
[s
].cout
+= len
; // To send to master..
811 // Helper routine for the TBF filters.
812 // Used to send queued data in to the user!
814 void send_ipout(sessionidt s
, u8
*buf
, int len
)
822 if (len
< 0 || len
> MAXETHER
)
824 log(1,0,0,0, "Odd size IP packet: %d bytes\n", len
);
828 // Skip the tun header
832 ip
= *(u32
*)(buf
+ 16);
836 t
= session
[s
].tunnel
;
839 log(5, session
[s
].ip
, s
, t
, "Ethernet -> Tunnel (%d bytes)\n", len
);
841 // Snooping this session.
842 if (sp
->snoop_ip
&& sp
->snoop_port
)
843 snoop_send_packet(buf
, len
, sp
->snoop_ip
, sp
->snoop_port
);
845 // Add on L2TP header
847 u8
*p
= makeppp(b
, sizeof(b
), buf
, len
, t
, s
, PPPIP
);
850 log(3, session
[s
].ip
, s
, t
, "failed to send packet in send_ipout.\n");
853 tunnelsend(b
, len
+ (p
-b
), t
); // send it...
855 sp
->cout
+= len
; // byte count
856 sp
->total_cout
+= len
; // byte count
859 sess_count
[s
].cout
+= len
; // To send to master..
862 // add an AVP (16 bit)
863 void control16(controlt
* c
, u16 avp
, u16 val
, u8 m
)
865 u16 l
= (m
? 0x8008 : 0x0008);
866 *(u16
*) (c
->buf
+ c
->length
+ 0) = htons(l
);
867 *(u16
*) (c
->buf
+ c
->length
+ 2) = htons(0);
868 *(u16
*) (c
->buf
+ c
->length
+ 4) = htons(avp
);
869 *(u16
*) (c
->buf
+ c
->length
+ 6) = htons(val
);
873 // add an AVP (32 bit)
874 void control32(controlt
* c
, u16 avp
, u32 val
, u8 m
)
876 u16 l
= (m
? 0x800A : 0x000A);
877 *(u16
*) (c
->buf
+ c
->length
+ 0) = htons(l
);
878 *(u16
*) (c
->buf
+ c
->length
+ 2) = htons(0);
879 *(u16
*) (c
->buf
+ c
->length
+ 4) = htons(avp
);
880 *(u32
*) (c
->buf
+ c
->length
+ 6) = htonl(val
);
884 // add an AVP (32 bit)
885 void controls(controlt
* c
, u16 avp
, char *val
, u8 m
)
887 u16 l
= ((m
? 0x8000 : 0) + strlen(val
) + 6);
888 *(u16
*) (c
->buf
+ c
->length
+ 0) = htons(l
);
889 *(u16
*) (c
->buf
+ c
->length
+ 2) = htons(0);
890 *(u16
*) (c
->buf
+ c
->length
+ 4) = htons(avp
);
891 memcpy(c
->buf
+ c
->length
+ 6, val
, strlen(val
));
892 c
->length
+= 6 + strlen(val
);
896 void controlb(controlt
* c
, u16 avp
, char *val
, unsigned int len
, u8 m
)
898 u16 l
= ((m
? 0x8000 : 0) + len
+ 6);
899 *(u16
*) (c
->buf
+ c
->length
+ 0) = htons(l
);
900 *(u16
*) (c
->buf
+ c
->length
+ 2) = htons(0);
901 *(u16
*) (c
->buf
+ c
->length
+ 4) = htons(avp
);
902 memcpy(c
->buf
+ c
->length
+ 6, val
, len
);
903 c
->length
+= 6 + len
;
906 // new control connection
907 controlt
*controlnew(u16 mtype
)
911 c
= malloc(sizeof(controlt
));
915 controlfree
= c
->next
;
919 *(u16
*) (c
->buf
+ 0) = htons(0xC802); // flags/ver
921 control16(c
, 0, mtype
, 1);
925 // send zero block if nothing is waiting
927 void controlnull(tunnelidt t
)
930 if (tunnel
[t
].controlc
) // Messages queued; They will carry the ack.
933 *(u16
*) (buf
+ 0) = htons(0xC802); // flags/ver
934 *(u16
*) (buf
+ 2) = htons(12); // length
935 *(u16
*) (buf
+ 4) = htons(tunnel
[t
].far
); // tunnel
936 *(u16
*) (buf
+ 6) = htons(0); // session
937 *(u16
*) (buf
+ 8) = htons(tunnel
[t
].ns
); // sequence
938 *(u16
*) (buf
+ 10) = htons(tunnel
[t
].nr
); // sequence
939 tunnelsend(buf
, 12, t
);
942 // add a control message to a tunnel, and send if within window
943 void controladd(controlt
* c
, tunnelidt t
, sessionidt s
)
945 *(u16
*) (c
->buf
+ 2) = htons(c
->length
); // length
946 *(u16
*) (c
->buf
+ 4) = htons(tunnel
[t
].far
); // tunnel
947 *(u16
*) (c
->buf
+ 6) = htons(s
? session
[s
].far
: 0); // session
948 *(u16
*) (c
->buf
+ 8) = htons(tunnel
[t
].ns
); // sequence
949 tunnel
[t
].ns
++; // advance sequence
950 // link in message in to queue
951 if (tunnel
[t
].controlc
)
952 tunnel
[t
].controle
->next
= c
;
954 tunnel
[t
].controls
= c
;
955 tunnel
[t
].controle
= c
;
956 tunnel
[t
].controlc
++;
957 // send now if space in window
958 if (tunnel
[t
].controlc
<= tunnel
[t
].window
)
960 tunnel
[t
].try = 0; // first send
961 tunnelsend(c
->buf
, c
->length
, t
);
966 // Throttle or Unthrottle a session
968 // Throttle the data folling through a session
969 // to be no more than 'throttle' kbit/sec each way.
971 int throttle_session(sessionidt s
, int throttle
)
973 if (!session
[s
].tunnel
)
974 return 0; // No-one home.
976 if (!*session
[s
].user
)
977 return 0; // User not logged in
981 if (session
[s
].tbf_in
|| session
[s
].tbf_out
)
983 if (throttle
== session
[s
].throttle
)
986 // Currently throttled but the rate is changing.
988 free_tbf(session
[s
].tbf_in
);
989 free_tbf(session
[s
].tbf_out
);
992 session
[s
].tbf_in
= new_tbf(s
, throttle
*1024/4, throttle
*1024/8, send_ipin
);
993 session
[s
].tbf_out
= new_tbf(s
, throttle
*1024/4, throttle
*1024/8, send_ipout
);
995 if (throttle
!= session
[s
].throttle
)
997 // Changed. Flood to slaves.
998 session
[s
].throttle
= throttle
;
999 cluster_send_session(s
);
1005 // else Unthrottling.
1007 if (!session
[s
].tbf_in
&& !session
[s
].tbf_out
&& !session
[s
].throttle
)
1010 free_tbf(session
[s
].tbf_in
);
1011 session
[s
].tbf_in
= 0;
1013 free_tbf(session
[s
].tbf_out
);
1014 session
[s
].tbf_out
= 0;
1016 if (throttle
!= session
[s
].throttle
)
1018 // Changed. Flood to slaves.
1019 session
[s
].throttle
= throttle
;
1020 cluster_send_session(s
);
1026 // start tidy shutdown of session
1027 void sessionshutdown(sessionidt s
, char *reason
)
1029 int dead
= session
[s
].die
;
1030 int walled_garden
= session
[s
].walled_garden
;
1033 CSTAT(call_sessionshutdown
);
1035 if (!session
[s
].tunnel
)
1037 log(3, session
[s
].ip
, s
, session
[s
].tunnel
, "Called sessionshutdown on a session with no tunnel.\n");
1038 return; // not a live session
1042 log(2, 0, s
, session
[s
].tunnel
, "Shutting down session %d: %s\n", s
, reason
);
1044 session
[s
].die
= now() + 150; // Clean up in 15 seconds
1047 struct param_kill_session data
= { &tunnel
[session
[s
].tunnel
], &session
[s
] };
1048 run_plugins(PLUGIN_KILL_SESSION
, &data
);
1051 // RADIUS Stop message
1052 if (session
[s
].opened
&& !walled_garden
&& !dead
)
1054 u16 r
= session
[s
].radius
;
1057 if (!(r
= radiusnew(s
)))
1059 log(1, 0, s
, session
[s
].tunnel
, "No free RADIUS sessions for Stop message\n");
1060 STAT(radius_overflow
);
1065 for (n
= 0; n
< 15; n
++)
1066 radius
[r
].auth
[n
] = rand();
1069 if (r
&& radius
[r
].state
!= RADIUSSTOP
)
1070 radiussend(r
, RADIUSSTOP
); // stop, if not already trying
1074 { // IP allocated, clear and unroute
1076 for (r
= 0; r
< MAXROUTE
&& session
[s
].route
[r
].ip
; r
++)
1078 routeset(s
, session
[s
].route
[r
].ip
, session
[s
].route
[r
].mask
, session
[s
].ip
, 0);
1079 session
[s
].route
[r
].ip
= 0;
1082 if (session
[s
].ip_pool_index
== -1) // static ip
1084 routeset(s
, session
[s
].ip
, 0, 0, 0); // Delete route.
1090 if (session
[s
].throttle
) // Unthrottle if throttled.
1091 throttle_session(s
, 0);
1094 controlt
*c
= controlnew(14); // sending CDN
1095 control16(c
, 1, 3, 1); // result code (admin reasons - TBA make error, general error, add message
1096 control16(c
, 14, s
, 1); // assigned session (our end)
1097 controladd(c
, session
[s
].tunnel
, s
); // send the message
1099 cluster_send_session(s
);
1102 void sendipcp(tunnelidt t
, sessionidt s
)
1105 u16 r
= session
[s
].radius
;
1108 CSTAT(call_sendipcp
);
1113 if (radius
[r
].state
!= RADIUSIPCP
)
1115 radius
[r
].state
= RADIUSIPCP
;
1119 radius
[r
].retry
= backoff(radius
[r
].try++);
1120 if (radius
[r
].try > 10)
1122 radiusclear(r
, s
); // Clear radius session.
1123 sessionshutdown(s
, "No reply on IPCP");
1127 q
= makeppp(buf
,sizeof(buf
), 0, 0, t
, s
, PPPIPCP
);
1130 log(3, session
[s
].ip
, s
, t
, "failed to send packet in sendipcp.\n");
1135 q
[1] = r
<< RADIUS_SHIFT
; // ID, dont care, we only send one type of request
1136 *(u16
*) (q
+ 2) = htons(10);
1139 *(u32
*) (q
+ 6) = config
->bind_address
? config
->bind_address
: my_address
; // send my IP
1140 tunnelsend(buf
, 10 + (q
- buf
), t
); // send it
1141 session
[s
].flags
&= ~SF_IPCP_ACKED
; // Clear flag.
1144 // kill a session now
1145 void sessionkill(sessionidt s
, char *reason
)
1148 CSTAT(call_sessionkill
);
1150 session
[s
].die
= now();
1151 sessionshutdown(s
, reason
); // close radius/routes, etc.
1152 if (session
[s
].radius
)
1153 radiusclear(session
[s
].radius
, s
); // cant send clean accounting data, session is killed
1155 log(2, 0, s
, session
[s
].tunnel
, "Kill session %d (%s): %s\n", s
, session
[s
].user
, reason
);
1157 throttle_session(s
, 0); // Force session to be un-throttle. Free'ing TBF structures.
1159 memset(&session
[s
], 0, sizeof(session
[s
]));
1160 session
[s
].tunnel
= T_FREE
; // Mark it as free.
1161 session
[s
].next
= sessionfree
;
1163 cli_session_actions
[s
].action
= 0;
1164 cluster_send_session(s
);
1167 // kill a tunnel now
1168 void tunnelkill(tunnelidt t
, char *reason
)
1173 CSTAT(call_tunnelkill
);
1175 tunnel
[t
].state
= TUNNELDIE
;
1177 // free control messages
1178 while ((c
= tunnel
[t
].controls
))
1180 controlt
* n
= c
->next
;
1181 tunnel
[t
].controls
= n
;
1182 tunnel
[t
].controlc
--;
1183 c
->next
= controlfree
;
1187 for (s
= 1; s
< MAXSESSION
; s
++)
1188 if (session
[s
].tunnel
== t
)
1189 sessionkill(s
, reason
);
1193 log(1, 0, 0, t
, "Kill tunnel %d: %s\n", t
, reason
);
1194 cli_tunnel_actions
[s
].action
= 0;
1195 cluster_send_tunnel(t
);
1198 // shut down a tunnel cleanly
1199 void tunnelshutdown(tunnelidt t
, char *reason
)
1203 CSTAT(call_tunnelshutdown
);
1205 if (!tunnel
[t
].last
|| !tunnel
[t
].far
|| tunnel
[t
].state
== TUNNELFREE
)
1207 // never set up, can immediately kill
1208 tunnelkill(t
, reason
);
1211 log(1, 0, 0, t
, "Shutting down tunnel %d (%s)\n", t
, reason
);
1214 for (s
= 1; s
< MAXSESSION
; s
++)
1215 if (session
[s
].tunnel
== t
)
1216 sessionkill(s
, reason
);
1218 tunnel
[t
].state
= TUNNELDIE
;
1219 tunnel
[t
].die
= now() + 700; // Clean up in 70 seconds
1220 cluster_send_tunnel(t
);
1221 // TBA - should we wait for sessions to stop?
1223 controlt
*c
= controlnew(4); // sending StopCCN
1224 control16(c
, 1, 1, 1); // result code (admin reasons - TBA make error, general error, add message
1225 control16(c
, 9, t
, 1); // assigned tunnel (our end)
1226 controladd(c
, t
, 0); // send the message
1230 // read and process packet on tunnel (UDP)
1231 void processudp(u8
* buf
, int len
, struct sockaddr_in
*addr
)
1233 char *chapresponse
= NULL
;
1234 u16 l
= len
, t
= 0, s
= 0, ns
= 0, nr
= 0;
1238 CSTAT(call_processudp
);
1242 log_hex(5, "UDP Data", buf
, len
);
1243 STAT(tunnel_rx_packets
);
1244 INC_STAT(tunnel_rx_bytes
, len
);
1247 log(1, ntohl(addr
->sin_addr
.s_addr
), 0, 0, "Short UDP, %d bytes\n", len
);
1248 STAT(tunnel_rx_errors
);
1251 if ((buf
[1] & 0x0F) != 2)
1253 log(1, ntohl(addr
->sin_addr
.s_addr
), 0, 0, "Bad L2TP ver %d\n", (buf
[1] & 0x0F) != 2);
1254 STAT(tunnel_rx_errors
);
1259 l
= ntohs(*(u16
*) p
);
1262 t
= ntohs(*(u16
*) p
);
1264 s
= ntohs(*(u16
*) p
);
1266 if (s
>= MAXSESSION
)
1268 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Received UDP packet with invalid session ID\n");
1269 STAT(tunnel_rx_errors
);
1274 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Received UDP packet with invalid tunnel ID\n");
1275 STAT(tunnel_rx_errors
);
1280 ns
= ntohs(*(u16
*) p
);
1282 nr
= ntohs(*(u16
*) p
);
1287 u16 o
= ntohs(*(u16
*) p
);
1292 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Bad length %d>%d\n", (p
- buf
), l
);
1293 STAT(tunnel_rx_errors
);
1299 u16 message
= 0xFFFF; // message type
1301 u8 mandatorymessage
= 0;
1302 u8 chap
= 0; // if CHAP being used
1303 u16 asession
= 0; // assigned session
1304 u32 amagic
= 0; // magic number
1305 u8 aflags
= 0; // flags from last LCF
1306 u16 version
= 0x0100; // protocol version (we handle 0.0 as well and send that back just in case)
1307 int requestchap
= 0; // do we request PAP instead of original CHAP request?
1308 char called
[MAXTEL
] = ""; // called number
1309 char calling
[MAXTEL
] = ""; // calling number
1311 if (!config
->cluster_iam_master
)
1313 master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
);
1317 if ((*buf
& 0xCA) != 0xC8)
1319 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Bad control header %02X\n", *buf
);
1320 STAT(tunnel_rx_errors
);
1323 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",
1324 l
, tunnel
[t
].controlc
, tunnel
[t
].ns
, tunnel
[t
].nr
, ns
, nr
);
1325 // if no tunnel specified, assign one
1331 // Is this a duplicate of the first packet? (SCCRQ)
1333 for (i
= 1; i
<= config
->cluster_highest_tunnelid
; ++i
)
1335 if (tunnel
[i
].state
!= TUNNELOPENING
||
1336 tunnel
[i
].ip
!= ntohl(*(ipt
*) & addr
->sin_addr
) ||
1337 tunnel
[i
].port
!= ntohs(addr
->sin_port
) )
1346 if (!(t
= new_tunnel()))
1348 log(1, ntohl(addr
->sin_addr
.s_addr
), 0, 0, "No more tunnels\n");
1349 STAT(tunnel_overflow
);
1353 tunnel
[t
].ip
= ntohl(*(ipt
*) & addr
->sin_addr
);
1354 tunnel
[t
].port
= ntohs(addr
->sin_port
);
1355 tunnel
[t
].window
= 4; // default window
1356 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
);
1357 STAT(tunnel_created
);
1360 // This is used to time out old tunnels
1361 tunnel
[t
].lastrec
= time_now
;
1363 // check sequence of this message
1365 int skip
= tunnel
[t
].window
; // track how many in-window packets are still in queue
1366 // some to clear maybe?
1367 while (tunnel
[t
].controlc
&& (((tunnel
[t
].ns
- tunnel
[t
].controlc
) - nr
) & 0x8000))
1369 controlt
*c
= tunnel
[t
].controls
;
1370 tunnel
[t
].controls
= c
->next
;
1371 tunnel
[t
].controlc
--;
1372 c
->next
= controlfree
;
1375 tunnel
[t
].try = 0; // we have progress
1378 // If the 'ns' just received is not the 'nr' we're
1379 // expecting, just send an ack and drop it.
1381 // if 'ns' is less, then we got a retransmitted packet.
1382 // if 'ns' is greater than missed a packet. Either way
1383 // we should ignore it.
1384 if (ns
!= tunnel
[t
].nr
)
1386 // is this the sequence we were expecting?
1387 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
);
1388 STAT(tunnel_rx_errors
);
1390 if (l
) // Is this not a ZLB?
1394 // receiver advance (do here so quoted correctly in any sends below)
1395 if (l
) tunnel
[t
].nr
= (ns
+ 1);
1396 if (skip
< 0) skip
= 0;
1397 if (skip
< tunnel
[t
].controlc
)
1399 // some control packets can now be sent that were previous stuck out of window
1400 int tosend
= tunnel
[t
].window
- skip
;
1401 controlt
*c
= tunnel
[t
].controls
;
1409 tunnel
[t
].try = 0; // first send
1410 tunnelsend(c
->buf
, c
->length
, t
);
1415 if (!tunnel
[t
].controlc
)
1416 tunnel
[t
].retry
= 0; // caught up
1419 { // if not a null message
1421 while (l
&& !(fatal
& 0x80))
1423 u16 n
= (ntohs(*(u16
*) p
) & 0x3FF);
1430 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Invalid length in AVP\n");
1431 STAT(tunnel_rx_errors
);
1438 // handle hidden AVPs
1439 if (!*config
->l2tpsecret
)
1441 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Hidden AVP requested, but no L2TP secret.\n");
1445 if (!session
[s
].random_vector_length
)
1447 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Hidden AVP requested, but no random vector.\n");
1451 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Hidden AVP\n");
1455 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Unrecognised AVP flags %02X\n", *b
);
1462 log(2, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Unknown AVP vendor %d\n", ntohs(*(u16
*) (b
)));
1467 mtype
= ntohs(*(u16
*) (b
));
1471 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " AVP %d (%s) len %d\n", mtype
, avpnames
[mtype
], n
);
1474 case 0: // message type
1475 message
= ntohs(*(u16
*) b
);
1476 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Message type = %d (%s)\n", *b
,
1477 l2tp_message_types
[message
]);
1478 mandatorymessage
= flags
;
1480 case 1: // result code
1482 u16 rescode
= ntohs(*(u16
*)(b
));
1483 const char* resdesc
= "(unknown)";
1486 if (rescode
<= MAX_STOPCCN_RESULT_CODE
)
1487 resdesc
= stopccn_result_codes
[rescode
];
1489 else if (message
== 14)
1491 if (rescode
<= MAX_CDN_RESULT_CODE
)
1492 resdesc
= cdn_result_codes
[rescode
];
1495 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Result Code %d: %s\n",
1499 u16 errcode
= ntohs(*(u16
*)(b
+ 2));
1500 const char* errdesc
= "(unknown)";
1501 if (errcode
<= MAX_ERROR_CODE
)
1502 errdesc
= error_codes
[errcode
];
1503 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Error Code %d: %s\n",
1507 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Error String: %.*s\n",
1513 case 2: // protocol version
1515 version
= ntohs(*(u16
*) (b
));
1516 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Protocol version = %d\n", version
);
1517 if (version
&& version
!= 0x0100)
1518 { // allow 0.0 and 1.0
1519 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Bad protocol version %04X\n",
1526 case 3: // framing capabilities
1527 // log(4, ntohl(addr->sin_addr.s_addr), s, t, "Framing capabilities\n");
1529 case 4: // bearer capabilities
1530 // log(4, ntohl(addr->sin_addr.s_addr), s, t, "Bearer capabilities\n");
1532 case 5: // tie breaker
1533 // We never open tunnels, so we don't care about tie breakers
1534 // log(4, ntohl(addr->sin_addr.s_addr), s, t, "Tie breaker\n");
1536 case 6: // firmware revision
1537 // log(4, ntohl(addr->sin_addr.s_addr), s, t, "Firmware revision\n");
1539 case 7: // host name
1540 memset(tunnel
[t
].hostname
, 0, 128);
1541 memcpy(tunnel
[t
].hostname
, b
, (n
>= 127) ? 127 : n
);
1542 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Tunnel hostname = \"%s\"\n", tunnel
[t
].hostname
);
1543 // TBA - to send to RADIUS
1545 case 8: // vendor name
1546 memset(tunnel
[t
].vendor
, 0, sizeof(tunnel
[t
].vendor
));
1547 memcpy(tunnel
[t
].vendor
, b
, (n
>= sizeof(tunnel
[t
].vendor
) - 1) ? sizeof(tunnel
[t
].vendor
) - 1 : n
);
1548 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Vendor name = \"%s\"\n", tunnel
[t
].vendor
);
1550 case 9: // assigned tunnel
1551 tunnel
[t
].far
= ntohs(*(u16
*) (b
));
1552 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Remote tunnel id = %d\n", tunnel
[t
].far
);
1554 case 10: // rx window
1555 tunnel
[t
].window
= ntohs(*(u16
*) (b
));
1556 if (!tunnel
[t
].window
)
1557 tunnel
[t
].window
= 1; // window of 0 is silly
1558 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " rx window = %d\n", tunnel
[t
].window
);
1560 case 11: // Challenge
1562 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " LAC requested CHAP authentication for tunnel\n");
1563 build_chap_response(b
, 2, n
, &chapresponse
);
1566 case 14: // assigned session
1567 asession
= session
[s
].far
= ntohs(*(u16
*) (b
));
1568 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " assigned session = %d\n", asession
);
1570 case 15: // call serial number
1571 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " call serial number = %d\n", ntohl(*(u32
*)b
));
1573 case 18: // bearer type
1574 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " bearer type = %d\n", ntohl(*(u32
*)b
));
1577 case 19: // framing type
1578 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " framing type = %d\n", ntohl(*(u32
*)b
));
1581 case 21: // called number
1582 memset(called
, 0, MAXTEL
);
1583 memcpy(called
, b
, (n
>= MAXTEL
) ? (MAXTEL
-1) : n
);
1584 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Called <%s>\n", called
);
1586 case 22: // calling number
1587 memset(calling
, 0, MAXTEL
);
1588 memcpy(calling
, b
, (n
>= MAXTEL
) ? (MAXTEL
-1) : n
);
1589 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Calling <%s>\n", calling
);
1593 case 24: // tx connect speed
1596 session
[s
].tx_connect_speed
= ntohl(*(u32
*)b
);
1600 // AS5300s send connect speed as a string
1602 memcpy(tmp
, b
, (n
>= 30) ? 30 : n
);
1603 session
[s
].tx_connect_speed
= atol(tmp
);
1605 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " TX connect speed <%u>\n",
1606 session
[s
].tx_connect_speed
);
1608 case 38: // rx connect speed
1611 session
[s
].rx_connect_speed
= ntohl(*(u32
*)b
);
1615 // AS5300s send connect speed as a string
1617 memcpy(tmp
, b
, (n
>= 30) ? 30 : n
);
1618 session
[s
].rx_connect_speed
= atol(tmp
);
1620 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " RX connect speed <%u>\n",
1621 session
[s
].rx_connect_speed
);
1623 case 25: // Physical Channel ID
1625 u32 tmp
= ntohl(*(u32
*)b
);
1626 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Physical Channel ID <%X>\n", tmp
);
1629 case 29: // Proxy Authentication Type
1631 u16 authtype
= ntohs(*(u16
*)b
);
1632 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Proxy Auth Type %d (%s)\n",
1633 authtype
, authtypes
[authtype
]);
1634 requestchap
= (authtype
== 2);
1637 case 30: // Proxy Authentication Name
1639 char authname
[64] = {0};
1640 memcpy(authname
, b
, (n
> 63) ? 63 : n
);
1641 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Proxy Auth Name (%s)\n",
1645 case 31: // Proxy Authentication Challenge
1647 memcpy(radius
[session
[s
].radius
].auth
, b
, 16);
1648 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Proxy Auth Challenge\n");
1651 case 32: // Proxy Authentication ID
1653 u16 authid
= ntohs(*(u16
*)(b
));
1654 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Proxy Auth ID (%d)\n",
1656 if (session
[s
].radius
)
1657 radius
[session
[s
].radius
].id
= authid
;
1660 case 33: // Proxy Authentication Response
1662 char authresp
[64] = {0};
1663 memcpy(authresp
, b
, (n
> 63) ? 63 : n
);
1664 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Proxy Auth Response\n");
1667 case 27: // last send lcp
1668 { // find magic number
1669 u8
*p
= b
, *e
= p
+ n
;
1670 while (p
< e
&& p
[1])
1672 if (*p
== 5 && p
[1] == 6)
1673 amagic
= ntohl(*(u32
*) (p
+ 2));
1674 else if (*p
== 3 && p
[1] == 5 && *(u16
*) (p
+ 2) == htons(PPPCHAP
) && p
[4] == 5)
1677 aflags
|= SESSIONPFC
;
1679 aflags
|= SESSIONACFC
;
1684 char tmp
[500] = {0};
1686 memcpy((tmp
+ 1), b
, n
);
1690 case 28: // last recv lcp confreq
1692 char tmp
[500] = {0};
1694 memcpy((tmp
+ 1), b
, n
);
1697 case 26: // Initial Received LCP CONFREQ
1699 char tmp
[500] = {0};
1701 memcpy((tmp
+ 1), b
, n
);
1704 case 39: // seq required - we control it as an LNS anyway...
1706 case 36: // Random Vector
1707 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Random Vector received. Enabled AVP Hiding.\n");
1708 memset(session
[s
].random_vector
, 0, sizeof(session
[s
].random_vector
));
1709 memcpy(session
[s
].random_vector
, b
, n
);
1710 session
[s
].random_vector_length
= n
;
1713 log(2, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Unknown AVP type %d\n", mtype
);
1720 tunnelshutdown(t
, "Unknown Mandatory AVP");
1724 case 1: // SCCRQ - Start Control Connection Request
1726 controlt
*c
= controlnew(2); // sending SCCRP
1727 control16(c
, 2, version
, 1); // protocol version
1728 control32(c
, 3, 3, 1); // framing
1729 controls(c
, 7, tunnel
[t
].hostname
, 1); // host name (TBA)
1730 if (chapresponse
) controlb(c
, 13, chapresponse
, 16, 1); // Challenge response
1731 control16(c
, 9, t
, 1); // assigned tunnel
1732 controladd(c
, t
, s
); // send the resply
1734 tunnel
[t
].state
= TUNNELOPENING
;
1737 tunnel
[t
].state
= TUNNELOPEN
;
1740 tunnel
[t
].state
= TUNNELOPEN
;
1741 controlnull(t
); // ack
1744 controlnull(t
); // ack
1745 tunnelshutdown(t
, "Stopped"); // Shut down cleanly
1746 tunnelkill(t
, "Stopped"); // Immediately force everything dead
1749 controlnull(t
); // simply ACK
1763 STAT(session_overflow
);
1764 tunnelshutdown(t
, "No free sessions");
1772 sessionfree
= session
[s
].next
;
1773 memset(&session
[s
], 0, sizeof(session
[s
]));
1775 if (s
> config
->cluster_highest_sessionid
)
1776 config
->cluster_highest_sessionid
= s
;
1778 // make a RADIUS session
1779 if (!(r
= radiusnew(s
)))
1781 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "No free RADIUS sessions for ICRQ\n");
1782 sessionkill(s
, "no free RADIUS sesions");
1786 c
= controlnew(11); // sending ICRP
1787 session
[s
].id
= sessionid
++;
1788 session
[s
].opened
= time(NULL
);
1789 session
[s
].tunnel
= t
;
1790 session
[s
].far
= asession
;
1791 session
[s
].last_packet
= time_now
;
1792 log(3, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "New session (%d/%d)\n", tunnel
[t
].far
, session
[s
].far
);
1793 control16(c
, 14, s
, 1); // assigned session
1794 controladd(c
, t
, s
); // send the reply
1796 // Generate a random challenge
1798 for (n
= 0; n
< 15; n
++)
1799 radius
[r
].auth
[n
] = rand();
1801 strncpy(radius
[r
].calling
, calling
, sizeof(radius
[r
].calling
) - 1);
1802 strncpy(session
[s
].called
, called
, sizeof(session
[s
].called
) - 1);
1803 strncpy(session
[s
].calling
, calling
, sizeof(session
[s
].calling
) - 1);
1804 STAT(session_created
);
1811 if ( amagic
== 0) amagic
= time_now
;
1812 session
[s
].magic
= amagic
; // set magic number
1813 session
[s
].l2tp_flags
= aflags
; // set flags received
1814 log(3, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Magic %X Flags %X\n", amagic
, aflags
);
1815 controlnull(t
); // ack
1816 // In CHAP state, request PAP instead
1821 controlnull(t
); // ack
1822 sessionshutdown(s
, "Closed (Received CDN)");
1825 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Missing message type\n");
1828 STAT(tunnel_rx_errors
);
1829 if (mandatorymessage
& 0x80)
1830 tunnelshutdown(t
, "Unknown message");
1832 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Unknown message type %d\n", message
);
1835 if (chapresponse
) free(chapresponse
);
1836 cluster_send_tunnel(t
);
1840 log(4, 0, s
, t
, " Got a ZLB ack\n");
1847 log_hex(5, "Receive Tunnel Data", p
, l
);
1848 if (l
> 2 && p
[0] == 0xFF && p
[1] == 0x03)
1849 { // HDLC address header, discard
1855 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Short ppp length %d\n", l
);
1856 STAT(tunnel_rx_errors
);
1866 prot
= ntohs(*(u16
*) p
);
1871 if (s
&& !session
[s
].tunnel
) // Is something wrong??
1873 if (!config
->cluster_iam_master
)
1875 // Pass it off to the master to deal with..
1876 master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
);
1881 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "UDP packet contains session %d "
1882 "but no session[%d].tunnel exists (LAC said"
1883 " tunnel = %d). Dropping packet.\n", s
, s
, t
);
1884 STAT(tunnel_rx_errors
);
1890 log(3, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Session %d is closing. Don't process PPP packets\n", s
);
1891 // I'm pretty sure this isn't right -- mo.
1892 // return; // closing session, PPP not processed
1896 session
[s
].last_packet
= time_now
;
1897 if (!config
->cluster_iam_master
) { master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
); return; }
1898 processpap(t
, s
, p
, l
);
1900 else if (prot
== PPPCHAP
)
1902 session
[s
].last_packet
= time_now
;
1903 if (!config
->cluster_iam_master
) { master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
); return; }
1904 processchap(t
, s
, p
, l
);
1906 else if (prot
== PPPLCP
)
1908 session
[s
].last_packet
= time_now
;
1909 if (!config
->cluster_iam_master
) { master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
); return; }
1910 processlcp(t
, s
, p
, l
);
1912 else if (prot
== PPPIPCP
)
1914 session
[s
].last_packet
= time_now
;
1915 if (!config
->cluster_iam_master
) { master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
); return; }
1916 processipcp(t
, s
, p
, l
);
1918 else if (prot
== PPPCCP
)
1920 session
[s
].last_packet
= time_now
;
1921 if (!config
->cluster_iam_master
) { master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
); return; }
1922 processccp(t
, s
, p
, l
);
1924 else if (prot
== PPPIP
)
1926 if (!config
->cluster_iam_master
)
1928 // We're a slave. Should we forward this packet to the master?
1930 // Is this a walled garden session, or something that needs it's
1931 // idle time updated??
1933 // Maintain the idle timeouts on the master. If this would
1934 // significantly reset the idletimeout, run it via the master
1935 // to refresh the master's idle timer.
1936 // Not sure this is ideal: It may re-order packets.
1938 if (session
[s
].walled_garden
|| (session
[s
].last_packet
+ (ECHO_TIMEOUT
/2)) < time_now
)
1940 master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
);
1941 session
[s
].last_packet
= time_now
;
1944 // fall through to processipin.
1946 session
[s
].last_packet
= time_now
;
1947 processipin(t
, s
, p
, l
);
1951 STAT(tunnel_rx_errors
);
1952 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Unknown PPP protocol %04X\n", prot
);
1957 // read and process packet on tun
1958 void processtun(u8
* buf
, int len
)
1960 log_hex(5, "Receive TUN Data", buf
, len
);
1961 STAT(tun_rx_packets
);
1962 INC_STAT(tun_rx_bytes
, len
);
1964 CSTAT(call_processtun
);
1970 log(1, 0, 0, 0, "Short tun packet %d bytes\n", len
);
1971 STAT(tun_rx_errors
);
1975 if (*(u16
*) (buf
+ 2) == htons(PKTIP
)) // IP
1976 processipout(buf
, len
);
1981 // Maximum number of actions to complete.
1982 // This is to avoid sending out too many packets
1984 #define MAX_ACTIONS 500
1986 int regular_cleanups(void)
1988 static sessionidt s
= 0; // Next session to check for actions on.
1992 static clockt next_acct
= 0;
1995 log(3, 0, 0, 0, "Begin regular cleanup\n");
1997 for (r
= 1; r
< MAXRADIUS
; r
++)
1999 if (!radius
[r
].state
)
2001 if (radius
[r
].retry
)
2003 if (radius
[r
].retry
<= TIME
)
2006 radius
[r
].retry
= backoff(radius
[r
].try+1); // Is this really needed? --mo
2008 for (t
= 1; t
<= config
->cluster_highest_tunnelid
; t
++)
2010 // check for expired tunnels
2011 if (tunnel
[t
].die
&& tunnel
[t
].die
<= TIME
)
2013 STAT(tunnel_timeout
);
2014 tunnelkill(t
, "Expired");
2017 // check for message resend
2018 if (tunnel
[t
].retry
&& tunnel
[t
].controlc
)
2020 // resend pending messages as timeout on reply
2021 if (tunnel
[t
].retry
<= TIME
)
2023 controlt
*c
= tunnel
[t
].controls
;
2024 u8 w
= tunnel
[t
].window
;
2025 tunnel
[t
].try++; // another try
2026 if (tunnel
[t
].try > 5)
2027 tunnelkill(t
, "Timeout on control message"); // game over
2031 tunnelsend(c
->buf
, c
->length
, t
);
2037 if (tunnel
[t
].state
== TUNNELOPEN
&& tunnel
[t
].lastrec
< TIME
+ 600)
2039 controlt
*c
= controlnew(6); // sending HELLO
2040 controladd(c
, t
, 0); // send the message
2041 log(3, tunnel
[t
].ip
, 0, t
, "Sending HELLO message\n");
2044 // Check for tunnel changes requested from the CLI
2045 if ((a
= cli_tunnel_actions
[t
].action
))
2047 cli_tunnel_actions
[t
].action
= 0;
2048 if (a
& CLI_TUN_KILL
)
2050 log(2, tunnel
[t
].ip
, 0, t
, "Dropping tunnel by CLI\n");
2051 tunnelshutdown(t
, "Requested by administrator");
2058 for (i
= 1; i
<= config
->cluster_highest_sessionid
; i
++)
2061 if (s
> config
->cluster_highest_sessionid
)
2064 if (!session
[s
].tunnel
) // Session isn't in use
2067 if (!session
[s
].die
&& session
[s
].ip
&& !(session
[s
].flags
& SF_IPCP_ACKED
))
2069 // IPCP has not completed yet. Resend
2070 log(3, session
[s
].ip
, s
, session
[s
].tunnel
, "No ACK for initial IPCP ConfigReq... resending\n");
2071 sendipcp(session
[s
].tunnel
, s
);
2074 // check for expired sessions
2075 if (session
[s
].die
&& session
[s
].die
<= TIME
)
2077 sessionkill(s
, "Expired");
2078 if (++count
>= MAX_ACTIONS
) break;
2082 // Drop sessions who have not responded within IDLE_TIMEOUT seconds
2083 if (session
[s
].last_packet
&& (time_now
- session
[s
].last_packet
>= IDLE_TIMEOUT
))
2085 sessionkill(s
, "No response to LCP ECHO requests");
2086 STAT(session_timeout
);
2087 if (++count
>= MAX_ACTIONS
) break;
2091 // No data in IDLE_TIMEOUT seconds, send LCP ECHO
2092 if (session
[s
].user
[0] && (time_now
- session
[s
].last_packet
>= ECHO_TIMEOUT
))
2094 u8 b
[MAXCONTROL
] = {0};
2096 u8
*q
= makeppp(b
, sizeof(b
), 0, 0, session
[s
].tunnel
, s
, PPPLCP
);
2099 log(3, session
[s
].ip
, s
, t
, "failed to send ECHO packet.\n");
2104 *(u8
*)(q
+ 1) = (time_now
% 255); // ID
2105 *(u16
*)(q
+ 2) = htons(8); // Length
2106 *(u32
*)(q
+ 4) = 0; // Magic Number (not supported)
2108 log(4, session
[s
].ip
, s
, session
[s
].tunnel
, "No data in %d seconds, sending LCP ECHO\n",
2109 (int)(time_now
- session
[s
].last_packet
));
2110 tunnelsend(b
, 24, session
[s
].tunnel
); // send it
2111 if (++count
>= MAX_ACTIONS
) break;
2114 // Check for actions requested from the CLI
2115 if ((a
= cli_session_actions
[s
].action
))
2119 cli_session_actions
[s
].action
= 0;
2120 if (a
& CLI_SESS_KILL
)
2122 log(2, 0, s
, session
[s
].tunnel
, "Dropping session by CLI\n");
2123 sessionshutdown(s
, "Requested by administrator");
2124 a
= 0; // dead, no need to check for other actions
2127 if (a
& CLI_SESS_SNOOP
)
2129 log(2, 0, s
, session
[s
].tunnel
, "Snooping session by CLI (to %s:%d)\n",
2130 inet_toa(cli_session_actions
[s
].snoop_ip
), cli_session_actions
[s
].snoop_port
);
2132 session
[s
].snoop_ip
= cli_session_actions
[s
].snoop_ip
;
2133 session
[s
].snoop_port
= cli_session_actions
[s
].snoop_port
;
2137 if (a
& CLI_SESS_NOSNOOP
)
2139 log(2, 0, s
, session
[s
].tunnel
, "Unsnooping session by CLI\n");
2140 session
[s
].snoop_ip
= 0;
2141 session
[s
].snoop_port
= 0;
2145 if (a
& CLI_SESS_THROTTLE
)
2147 log(2, 0, s
, session
[s
].tunnel
, "Throttling session by CLI (to %d)\n",
2148 cli_session_actions
[s
].throttle
);
2150 throttle_session(s
, cli_session_actions
[s
].throttle
);
2153 if (a
& CLI_SESS_NOTHROTTLE
)
2155 log(2, 0, s
, session
[s
].tunnel
, "Un-throttling session by CLI\n");
2156 throttle_session(s
, 0);
2160 cluster_send_session(s
);
2162 if (++count
>= MAX_ACTIONS
) break;
2166 if (config
->accounting_dir
&& next_acct
<= TIME
)
2168 // Dump accounting data
2169 next_acct
= TIME
+ ACCT_TIME
;
2173 if (count
>= MAX_ACTIONS
)
2174 return 1; // Didn't finish!
2176 log(3, 0, 0, 0, "End regular cleanup (%d actions), next in %d seconds\n", count
, config
->cleanup_interval
);
2182 // Are we in the middle of a tunnel update, or radius
2185 int still_busy(void)
2188 static clockt last_talked
= 0;
2189 static clockt start_busy_wait
= 0;
2190 if (start_busy_wait
== 0)
2191 start_busy_wait
= TIME
;
2193 for (i
= config
->cluster_highest_tunnelid
; i
> 0 ; --i
)
2195 if (!tunnel
[i
].controlc
)
2198 if (last_talked
!= TIME
)
2200 log(2,0,0,0, "Tunnel %d still has un-acked control messages.\n", i
);
2206 // We stop waiting for radius after BUSY_WAIT_TIMEOUT 1/10th seconds
2207 if (abs(TIME
- start_busy_wait
) > BUSY_WAIT_TIMEOUT
)
2209 log(1, 0, 0, 0, "Giving up waiting for RADIUS to be empty. Shutting down anyway.\n");
2213 for (i
= 1; i
< MAXRADIUS
; i
++)
2215 if (radius
[i
].state
== RADIUSNULL
)
2217 if (radius
[i
].state
== RADIUSWAIT
)
2220 if (last_talked
!= TIME
)
2222 log(2,0,0,0, "Radius session %d is still busy (sid %d)\n", i
, radius
[i
].session
);
2231 // main loop - gets packets on tun or udp and processes them
2238 clockt next_cluster_ping
= 0; // send initial ping immediately
2239 time_t next_clean
= time_now
+ config
->cleanup_interval
;
2241 log(4, 0, 0, 0, "Beginning of main loop. udpfd=%d, tunfd=%d, cluster_sockfd=%d, controlfd=%d\n",
2242 udpfd
, tunfd
, cluster_sockfd
, controlfd
);
2247 FD_SET(controlfd
, &cr
);
2249 if (cluster_sockfd
) FD_SET(cluster_sockfd
, &cr
);
2251 if (cn
< tunfd
) cn
= tunfd
;
2252 if (cn
< controlfd
) cn
= controlfd
;
2253 if (cn
< clifd
) cn
= clifd
;
2254 if (cn
< cluster_sockfd
) cn
= cluster_sockfd
;
2255 for (i
= 0; i
< config
->num_radfds
; i
++)
2257 if (!radfds
[i
]) continue;
2258 FD_SET(radfds
[i
], &cr
);
2263 while (!main_quit
|| still_busy())
2269 int bgp_set
[BGP_NUM_PEERS
];
2272 if (config
->reload_config
)
2274 // Update the config state based on config settings
2278 memcpy(&r
, &cr
, sizeof(fd_set
));
2280 to
.tv_usec
= 100000; // 1/10th of a second.
2284 for (i
= 0; i
< BGP_NUM_PEERS
; i
++)
2286 bgp_set
[i
] = bgp_select_state(&bgp_peers
[i
]);
2289 FD_SET(bgp_peers
[i
].sock
, &r
);
2290 if (bgp_peers
[i
].sock
> n
)
2291 n
= bgp_peers
[i
].sock
;
2296 FD_SET(bgp_peers
[i
].sock
, &w
);
2297 if (bgp_peers
[i
].sock
> n
)
2298 n
= bgp_peers
[i
].sock
;
2302 n
= select(n
+ 1, &r
, &w
, 0, &to
);
2304 n
= select(n
+ 1, &r
, 0, 0, &to
);
2313 log(0, 0, 0, 0, "Error returned from select(): %s\n", strerror(errno
));
2319 struct sockaddr_in addr
;
2320 int alen
= sizeof(addr
);
2321 if (FD_ISSET(udpfd
, &r
))
2324 for (c
= 0; c
< config
->multi_read_count
; c
++)
2326 if ((n
= recvfrom(udpfd
, buf
, sizeof(buf
), 0, (void *) &addr
, &alen
)) > 0)
2327 processudp(buf
, n
, &addr
);
2332 if (FD_ISSET(tunfd
, &r
))
2335 for (c
= 0; c
< config
->multi_read_count
; c
++)
2337 if ((n
= read(tunfd
, buf
, sizeof(buf
))) > 0)
2343 for (i
= 0; i
< config
->num_radfds
; i
++)
2344 if (FD_ISSET(radfds
[i
], &r
))
2345 processrad(buf
, recv(radfds
[i
], buf
, sizeof(buf
), 0), i
);
2346 if (FD_ISSET(cluster_sockfd
, &r
))
2349 size
= recvfrom(cluster_sockfd
, buf
, sizeof(buf
), MSG_WAITALL
, (void *) &addr
, &alen
);
2350 processcluster(buf
, size
, addr
.sin_addr
.s_addr
);
2352 if (FD_ISSET(controlfd
, &r
))
2353 processcontrol(buf
, recvfrom(controlfd
, buf
, sizeof(buf
), MSG_WAITALL
, (void *) &addr
, &alen
), &addr
);
2354 if (FD_ISSET(clifd
, &r
))
2356 struct sockaddr_in addr
;
2358 int len
= sizeof(addr
);
2360 if ((sockfd
= accept(clifd
, (struct sockaddr
*)&addr
, &len
)) <= 0)
2362 log(0, 0, 0, 0, "accept error: %s\n", strerror(errno
));
2373 // Runs on every machine (master and slaves).
2374 if (cluster_sockfd
&& next_cluster_ping
<= TIME
)
2376 // Check to see which of the cluster is still alive..
2378 cluster_send_ping(basetime
); // Only does anything if we're a slave
2379 cluster_check_master(); // ditto.
2381 cluster_heartbeat(); // Only does anything if we're a master.
2382 cluster_check_slaves(); // ditto.
2384 master_update_counts(); // If we're a slave, send our byte counters to our master.
2386 if (config
->cluster_iam_master
&& !config
->cluster_iam_uptodate
)
2387 next_cluster_ping
= TIME
+ 1; // out-of-date slaves, do fast updates
2389 next_cluster_ping
= TIME
+ config
->cluster_hb_interval
;
2392 // Run token bucket filtering queue..
2393 // Only run it every 1/10th of a second.
2394 // Runs on all machines both master and slave.
2396 static clockt last_run
= 0;
2397 if (last_run
!= TIME
)
2404 /* Handle timeouts. Make sure that this gets run anyway, even if there was
2405 * something to read, else under load this will never actually run....
2408 if (config
->cluster_iam_master
&& next_clean
<= time_now
)
2410 if (regular_cleanups())
2413 next_clean
= time_now
+ 1 ; // Didn't finish. Check quickly.
2417 next_clean
= time_now
+ config
->cleanup_interval
; // Did. Move to next interval.
2422 for (i
= 0; i
< BGP_NUM_PEERS
; i
++)
2424 bgp_process(&bgp_peers
[i
],
2425 bgp_set
[i
] ? FD_ISSET(bgp_peers
[i
].sock
, &r
) : 0,
2426 bgp_set
[i
] ? FD_ISSET(bgp_peers
[i
].sock
, &w
) : 0);
2431 // Are we the master and shutting down??
2432 if (config
->cluster_iam_master
)
2433 cluster_heartbeat(); // Flush any queued changes..
2435 // Ok. Notify everyone we're shutting down. If we're
2436 // the master, this will force an election.
2437 cluster_send_ping(0);
2440 // Important!!! We MUST not process any packets past this point!
2443 // Init data structures
2448 _statistics
= mmap(NULL
, sizeof(struct Tstats
), PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2449 if (_statistics
== MAP_FAILED
)
2451 log(0, 0, 0, 0, "Error doing mmap for _statistics: %s\n", strerror(errno
));
2454 config
= mmap(NULL
, sizeof(struct configt
), PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2455 if (config
== MAP_FAILED
)
2457 log(0, 0, 0, 0, "Error doing mmap for configuration: %s\n", strerror(errno
));
2460 memset(config
, 0, sizeof(struct configt
));
2461 time(&config
->start_time
);
2462 strncpy(config
->config_file
, CONFIGFILE
, sizeof(config
->config_file
) - 1);
2463 tunnel
= mmap(NULL
, sizeof(tunnelt
) * MAXTUNNEL
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2464 if (tunnel
== MAP_FAILED
)
2466 log(0, 0, 0, 0, "Error doing mmap for tunnels: %s\n", strerror(errno
));
2469 session
= mmap(NULL
, sizeof(sessiont
) * MAXSESSION
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2470 if (session
== MAP_FAILED
)
2472 log(0, 0, 0, 0, "Error doing mmap for sessions: %s\n", strerror(errno
));
2476 sess_count
= mmap(NULL
, sizeof(sessioncountt
) * MAXSESSION
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2477 if (sess_count
== MAP_FAILED
)
2479 log(0, 0, 0, 0, "Error doing mmap for sessions_count: %s\n", strerror(errno
));
2483 radius
= mmap(NULL
, sizeof(radiust
) * MAXRADIUS
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2484 if (radius
== MAP_FAILED
)
2486 log(0, 0, 0, 0, "Error doing mmap for radius: %s\n", strerror(errno
));
2489 ip_address_pool
= mmap(NULL
, sizeof(ippoolt
) * MAXIPPOOL
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2490 if (ip_address_pool
== MAP_FAILED
)
2492 log(0, 0, 0, 0, "Error doing mmap for ip_address_pool: %s\n", strerror(errno
));
2496 ringbuffer
= mmap(NULL
, sizeof(struct Tringbuffer
), PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2497 if (ringbuffer
== MAP_FAILED
)
2499 log(0, 0, 0, 0, "Error doing mmap for ringbuffer: %s\n", strerror(errno
));
2502 memset(ringbuffer
, 0, sizeof(struct Tringbuffer
));
2505 cli_session_actions
= mmap(NULL
, sizeof(struct cli_session_actions
) * MAXSESSION
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2506 if (cli_session_actions
== MAP_FAILED
)
2508 log(0, 0, 0, 0, "Error doing mmap for cli session actions: %s\n", strerror(errno
));
2511 memset(cli_session_actions
, 0, sizeof(struct cli_session_actions
) * MAXSESSION
);
2512 cli_tunnel_actions
= mmap(NULL
, sizeof(struct cli_tunnel_actions
) * MAXSESSION
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2513 if (cli_tunnel_actions
== MAP_FAILED
)
2515 log(0, 0, 0, 0, "Error doing mmap for cli tunnel actions: %s\n", strerror(errno
));
2518 memset(cli_tunnel_actions
, 0, sizeof(struct cli_tunnel_actions
) * MAXSESSION
);
2520 memset(tunnel
, 0, sizeof(tunnelt
) * MAXTUNNEL
);
2521 memset(session
, 0, sizeof(sessiont
) * MAXSESSION
);
2522 memset(radius
, 0, sizeof(radiust
) * MAXRADIUS
);
2523 memset(ip_address_pool
, 0, sizeof(ippoolt
) * MAXIPPOOL
);
2525 // Put all the sessions on the free list marked as undefined.
2526 for (i
= 1; i
< MAXSESSION
- 1; i
++)
2528 session
[i
].next
= i
+ 1;
2529 session
[i
].tunnel
= T_UNDEF
; // mark it as not filled in.
2531 session
[MAXSESSION
- 1].next
= 0;
2534 // Mark all the tunnels as undefined (waiting to be filled in by a download).
2535 for (i
= 1; i
< MAXTUNNEL
- 1; i
++)
2536 tunnel
[i
].state
= TUNNELUNDEF
; // mark it as not filled in.
2541 // Grab my hostname unless it's been specified
2542 gethostname(hostname
, sizeof(hostname
));
2543 if ((p
= strchr(hostname
, '.'))) *p
= 0;
2545 _statistics
->start_time
= _statistics
->last_reset
= time(NULL
);
2548 bgp_peers
= mmap(NULL
, sizeof(struct bgp_peer
) * BGP_NUM_PEERS
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2549 if (bgp_peers
== MAP_FAILED
)
2551 log(0, 0, 0, 0, "Error doing mmap for bgp: %s\n", strerror(errno
));
2557 void initiptables(void)
2559 /* Flush the tables here so that we have a clean slate */
2561 // Not needed. 'nat' is setup by garden.c
2562 // mangle isn't used (as throttling is done by tbf inhouse).
2565 int assign_ip_address(sessionidt s
)
2569 time_t best_time
= time_now
;
2570 char *u
= session
[s
].user
;
2574 CSTAT(call_assign_ip_address
);
2576 for (i
= 1; i
< ip_pool_size
; i
++)
2578 if (!ip_address_pool
[i
].address
|| ip_address_pool
[i
].assigned
)
2581 if (!session
[s
].walled_garden
&& ip_address_pool
[i
].user
[0] && !strcmp(u
, ip_address_pool
[i
].user
))
2588 if (ip_address_pool
[i
].last
< best_time
)
2591 if (!(best_time
= ip_address_pool
[i
].last
))
2592 break; // never used, grab this one
2598 log(0, 0, s
, session
[s
].tunnel
, "assign_ip_address(): out of addresses\n");
2602 session
[s
].ip
= ip_address_pool
[best
].address
;
2603 session
[s
].ip_pool_index
= best
;
2604 ip_address_pool
[best
].assigned
= 1;
2605 ip_address_pool
[best
].last
= time_now
;
2606 ip_address_pool
[best
].session
= s
;
2607 if (session
[s
].walled_garden
)
2608 /* Don't track addresses of users in walled garden (note: this
2609 means that their address isn't "sticky" even if they get
2611 ip_address_pool
[best
].user
[0] = 0;
2613 strncpy(ip_address_pool
[best
].user
, u
, sizeof(ip_address_pool
[best
].user
) - 1);
2616 log(4, ip_address_pool
[best
].address
, s
, session
[s
].tunnel
,
2617 "assign_ip_address(): %s ip address %d from pool\n", reuse
? "Reusing" : "Allocating", best
);
2622 void free_ip_address(sessionidt s
)
2624 int i
= session
[s
].ip_pool_index
;
2627 return; // what the?
2629 if (i
< 0) // Is this actually part of the ip pool?
2633 cache_ipmap(session
[s
].ip
, -i
); // Change the mapping to point back to the ip pool index.
2635 ip_address_pool
[i
].assigned
= 0;
2636 ip_address_pool
[i
].session
= 0;
2637 ip_address_pool
[i
].last
= time_now
;
2640 CSTAT(call_free_ip_address
);
2645 // Fsck the address pool against the session table.
2646 // Normally only called when we become a master.
2648 // This isn't perfect: We aren't keep tracking of which
2649 // users used to have an IP address.
2651 void rebuild_address_pool(void)
2656 // Zero the IP pool allocation, and build
2657 // a map from IP address to pool index.
2658 for (i
= 1; i
< MAXIPPOOL
; ++i
)
2660 ip_address_pool
[i
].assigned
= 0;
2661 ip_address_pool
[i
].session
= 0;
2662 if (!ip_address_pool
[i
].address
)
2665 cache_ipmap(ip_address_pool
[i
].address
, -i
); // Map pool IP to pool index.
2668 for (i
= 0; i
< MAXSESSION
; ++i
)
2671 if (!session
[i
].ip
|| !session
[i
].tunnel
)
2673 ipid
= - lookup_ipmap(htonl(session
[i
].ip
));
2675 if (session
[i
].ip_pool_index
< 0)
2677 // Not allocated out of the pool.
2678 if (ipid
< 1) // Not found in the pool either? good.
2681 log(0, 0, i
, 0, "Session %d has an IP address (%s) that was marked static, but is in the pool (%d)!\n",
2682 i
, inet_toa(session
[i
].ip
), ipid
);
2684 // Fall through and process it as part of the pool.
2688 if (ipid
> MAXIPPOOL
|| ipid
< 0)
2690 log(0, 0, i
, 0, "Session %d has a pool IP that's not found in the pool! (%d)\n", i
, ipid
);
2692 session
[i
].ip_pool_index
= ipid
;
2696 ip_address_pool
[ipid
].assigned
= 1;
2697 ip_address_pool
[ipid
].session
= i
;
2698 ip_address_pool
[ipid
].last
= time_now
;
2699 strncpy(ip_address_pool
[ipid
].user
, session
[i
].user
, sizeof(ip_address_pool
[ipid
].user
) - 1);
2700 session
[i
].ip_pool_index
= ipid
;
2701 cache_ipmap(session
[i
].ip
, i
); // Fix the ip map.
2706 // Fix the address pool to match a changed session.
2707 // (usually when the master sends us an update).
2708 void fix_address_pool(int sid
)
2712 ipid
= session
[sid
].ip_pool_index
;
2714 if (ipid
> ip_pool_size
)
2715 return; // Ignore it. rebuild_address_pool will fix it up.
2717 if (ip_address_pool
[ipid
].address
!= session
[sid
].ip
)
2718 return; // Just ignore it. rebuild_address_pool will take care of it.
2720 ip_address_pool
[ipid
].assigned
= 1;
2721 ip_address_pool
[ipid
].session
= sid
;
2722 ip_address_pool
[ipid
].last
= time_now
;
2723 strncpy(ip_address_pool
[ipid
].user
, session
[sid
].user
, sizeof(ip_address_pool
[ipid
].user
) - 1);
2727 // Add a block of addresses to the IP pool to hand out.
2729 void add_to_ip_pool(u32 addr
, u32 mask
)
2733 mask
= 0xffffffff; // Host route only.
2737 if (ip_pool_size
>= MAXIPPOOL
) // Pool is full!
2740 for (i
= addr
;(i
& mask
) == addr
; ++i
)
2742 if ((i
& 0xff) == 0 || (i
&0xff) == 255)
2743 continue; // Skip 0 and broadcast addresses.
2745 ip_address_pool
[ip_pool_size
].address
= i
;
2746 ip_address_pool
[ip_pool_size
].assigned
= 0;
2748 if (ip_pool_size
>= MAXIPPOOL
)
2750 log(0,0,0,0, "Overflowed IP pool adding %s\n", inet_toa(htonl(addr
)) );
2756 // Initialize the IP address pool
2762 memset(ip_address_pool
, 0, sizeof(ip_address_pool
));
2764 if (!(f
= fopen(IPPOOLFILE
, "r")))
2766 log(0, 0, 0, 0, "Can't load pool file " IPPOOLFILE
": %s\n", strerror(errno
));
2770 while (ip_pool_size
< MAXIPPOOL
&& fgets(buf
, 4096, f
))
2773 buf
[4095] = 0; // Force it to be zero terminated/
2775 if (*buf
== '#' || *buf
== '\n')
2776 continue; // Skip comments / blank lines
2777 if ((p
= (char *)strrchr(buf
, '\n'))) *p
= 0;
2778 if ((p
= (char *)strchr(buf
, ':')))
2782 src
= inet_addr(buf
);
2783 if (src
== INADDR_NONE
)
2785 log(0, 0, 0, 0, "Invalid address pool IP %s\n", buf
);
2788 // This entry is for a specific IP only
2789 if (src
!= config
->bind_address
)
2794 if ((p
= (char *)strchr(pool
, '/')))
2798 u32 start
= 0, mask
= 0;
2800 log(2, 0, 0, 0, "Adding IP address range %s\n", buf
);
2802 if (!*p
|| !(numbits
= atoi(p
)))
2804 log(0, 0, 0, 0, "Invalid pool range %s\n", buf
);
2807 start
= ntohl(inet_addr(pool
));
2808 mask
= (u32
)(pow(2, numbits
) - 1) << (32 - numbits
);
2810 // Add a static route for this pool
2811 log(5, 0, 0, 0, "Adding route for address pool %s/%u\n", inet_toa(htonl(start
)), 32 + mask
);
2812 routeset(0, start
, mask
, 0, 1);
2814 add_to_ip_pool(start
, mask
);
2818 // It's a single ip address
2819 add_to_ip_pool(inet_addr(pool
), 0);
2823 log(1, 0, 0, 0, "IP address pool is %d addresses\n", ip_pool_size
- 1);
2826 void snoop_send_packet(char *packet
, u16 size
, ipt destination
, u16 port
)
2828 struct sockaddr_in snoop_addr
= {0};
2829 if (!destination
|| !port
|| snoopfd
<= 0 || size
<= 0 || !packet
)
2832 snoop_addr
.sin_family
= AF_INET
;
2833 snoop_addr
.sin_addr
.s_addr
= destination
;
2834 snoop_addr
.sin_port
= ntohs(port
);
2836 log(5, 0, 0, 0, "Snooping packet at %p (%d bytes) to %s:%d\n",
2837 packet
, size
, inet_toa(snoop_addr
.sin_addr
.s_addr
), htons(snoop_addr
.sin_port
));
2838 if (sendto(snoopfd
, packet
, size
, MSG_DONTWAIT
| MSG_NOSIGNAL
, (void *) &snoop_addr
, sizeof(snoop_addr
)) < 0)
2839 log(0, 0, 0, 0, "Error sending intercept packet: %s\n", strerror(errno
));
2840 STAT(packets_snooped
);
2843 void dump_acct_info()
2845 char filename
[1024];
2847 time_t t
= time(NULL
);
2852 CSTAT(call_dump_acct_info
);
2854 strftime(timestr
, 64, "%Y%m%d%H%M%S", localtime(&t
));
2855 snprintf(filename
, 1024, "%s/%s", config
->accounting_dir
, timestr
);
2857 for (i
= 0; i
< MAXSESSION
; i
++)
2859 if (!session
[i
].opened
|| !session
[i
].ip
|| !session
[i
].cin
|| !session
[i
].cout
|| !*session
[i
].user
|| session
[i
].walled_garden
)
2863 time_t now
= time(NULL
);
2864 if (!(f
= fopen(filename
, "w")))
2866 log(0, 0, 0, 0, "Can't write accounting info to %s: %s\n", filename
, strerror(errno
));
2869 log(3, 0, 0, 0, "Dumping accounting information to %s\n", filename
);
2870 fprintf(f
, "# dslwatch.pl dump file V1.01\n"
2874 "# format: username ip qos uptxoctets downrxoctets\n",
2880 log(4, 0, 0, 0, "Dumping accounting information for %s\n", session
[i
].user
);
2881 fprintf(f
, "%s %s %d %u %u\n",
2882 session
[i
].user
, // username
2883 inet_toa(htonl(session
[i
].ip
)), // ip
2884 (session
[i
].throttle
) ? 2 : 1, // qos
2885 (u32
)session
[i
].cin
, // uptxoctets
2886 (u32
)session
[i
].cout
); // downrxoctets
2888 session
[i
].pin
= session
[i
].cin
= 0;
2889 session
[i
].pout
= session
[i
].cout
= 0;
2897 int main(int argc
, char *argv
[])
2902 _program_name
= strdup(argv
[0]);
2904 time(&basetime
); // start clock
2907 while ((o
= getopt(argc
, argv
, "vc:h:a:")) >= 0)
2912 // Double fork to detach from terminal
2913 if (fork()) exit(0);
2914 if (fork()) exit(0);
2920 snprintf(hostname
, sizeof(hostname
), "%s", optarg
);
2924 printf("Args are:\n"
2925 "\t-d\tDetach from terminal\n"
2926 "\t-c <file>\tConfig file\n"
2927 "\t-h <hostname>\tForce hostname\n"
2928 "\t-a <address>\tUse specific address\n"
2936 // Start the timer routine off
2938 strftime(time_now_string
, sizeof(time_now_string
), "%Y-%m-%d %H:%M:%S", localtime(&time_now
));
2939 signal(SIGALRM
, sigalrm_handler
);
2940 siginterrupt(SIGALRM
, 0);
2946 config
->debug
= optdebug
;
2952 log(0, 0, 0, 0, "L2TPNS version " VERSION
"\n");
2953 log(0, 0, 0, 0, "Copyright (c) 2003, 2004 Optus Internet Engineering\n");
2954 log(0, 0, 0, 0, "Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced\n");
2957 rlim
.rlim_cur
= RLIM_INFINITY
;
2958 rlim
.rlim_max
= RLIM_INFINITY
;
2959 // Remove the maximum core size
2960 if (setrlimit(RLIMIT_CORE
, &rlim
) < 0)
2961 log(0, 0, 0, 0, "Can't set ulimit: %s\n", strerror(errno
));
2962 // Make core dumps go to /tmp
2966 if (config
->scheduler_fifo
)
2969 struct sched_param params
= {0};
2970 params
.sched_priority
= 1;
2972 if (get_nprocs() < 2)
2974 log(0, 0, 0, 0, "Not using FIFO scheduler, there is only 1 processor in the system.\n");
2975 config
->scheduler_fifo
= 0;
2979 if ((ret
= sched_setscheduler(0, SCHED_FIFO
, ¶ms
)) == 0)
2981 log(1, 0, 0, 0, "Using FIFO scheduler. Say goodbye to any other processes running\n");
2985 log(0, 0, 0, 0, "Error setting scheduler to FIFO: %s\n", strerror(errno
));
2986 config
->scheduler_fifo
= 0;
2991 /* Set up the cluster communications port. */
2992 if (cluster_init(config
->bind_address
) < 0)
2996 signal(SIGPIPE
, SIG_IGN
);
2997 bgp_setup(config
->as_number
);
2998 bgp_add_route(config
->bind_address
, 0xffffffff);
2999 if (*config
->bgp_peer
[0])
3000 bgp_start(&bgp_peers
[0], config
->bgp_peer
[0],
3001 config
->bgp_peer_as
[0], 0); /* 0 = routing disabled */
3003 if (*config
->bgp_peer
[1])
3004 bgp_start(&bgp_peers
[1], config
->bgp_peer
[1],
3005 config
->bgp_peer_as
[1], 0);
3009 log(1, 0, 0, 0, "Set up on interface %s\n", config
->tundevice
);
3017 signal(SIGHUP
, sighup_handler
);
3018 signal(SIGTERM
, sigterm_handler
);
3019 signal(SIGINT
, sigterm_handler
);
3020 signal(SIGQUIT
, sigquit_handler
);
3021 signal(SIGCHLD
, sigchild_handler
);
3023 // Prevent us from getting paged out
3024 if (config
->lock_pages
)
3026 if (!mlockall(MCL_CURRENT
))
3027 log(1, 0, 0, 0, "Locking pages into memory\n");
3029 log(0, 0, 0, 0, "Can't lock pages: %s\n", strerror(errno
));
3034 // Drop privileges here
3035 if (config
->target_uid
> 0 && geteuid() == 0)
3036 setuid(config
->target_uid
);
3041 /* try to shut BGP down cleanly; with luck the sockets will be
3042 writable since we're out of the select */
3045 for (i
= 0; i
< BGP_NUM_PEERS
; i
++)
3046 if (bgp_peers
[i
].state
== Established
)
3047 bgp_stop(&bgp_peers
[i
]);
3051 /* remove plugins (so cleanup code gets run) */
3054 // Remove the PID file if we wrote it
3055 if (config
->wrote_pid
&& *config
->pid_file
== '/')
3056 unlink(config
->pid_file
);
3058 /* kill CLI children */
3059 signal(SIGTERM
, SIG_IGN
);
3064 void sighup_handler(int junk
)
3066 if (log_stream
&& log_stream
!= stderr
)
3075 void sigalrm_handler(int junk
)
3077 // Log current traffic stats
3079 snprintf(config
->bandwidth
, sizeof(config
->bandwidth
),
3080 "UDP-ETH:%1.0f/%1.0f ETH-UDP:%1.0f/%1.0f TOTAL:%0.1f IN:%u OUT:%u",
3081 (udp_rx
/ 1024.0 / 1024.0 * 8),
3082 (eth_tx
/ 1024.0 / 1024.0 * 8),
3083 (eth_rx
/ 1024.0 / 1024.0 * 8),
3084 (udp_tx
/ 1024.0 / 1024.0 * 8),
3085 ((udp_tx
+ udp_rx
+ eth_tx
+ eth_rx
) / 1024.0 / 1024.0 * 8),
3086 udp_rx_pkt
, eth_rx_pkt
);
3088 udp_tx
= udp_rx
= 0;
3089 udp_rx_pkt
= eth_rx_pkt
= 0;
3090 eth_tx
= eth_rx
= 0;
3092 if (config
->dump_speed
)
3093 printf("%s\n", config
->bandwidth
);
3095 // Update the internal time counter
3097 strftime(time_now_string
, sizeof(time_now_string
), "%Y-%m-%d %H:%M:%S", localtime(&time_now
));
3102 struct param_timer p
= { time_now
};
3103 run_plugins(PLUGIN_TIMER
, &p
);
3108 void sigterm_handler(int junk
)
3110 log(1, 0, 0, 0, "Shutting down cleanly\n");
3111 if (config
->save_state
)
3117 void sigquit_handler(int junk
)
3121 log(1, 0, 0, 0, "Shutting down without saving sessions\n");
3122 for (i
= 1; i
< MAXSESSION
; i
++)
3124 if (session
[i
].opened
)
3125 sessionkill(i
, "L2TPNS Closing");
3127 for (i
= 1; i
< MAXTUNNEL
; i
++)
3129 if (tunnel
[i
].ip
|| tunnel
[i
].state
)
3130 tunnelshutdown(i
, "L2TPNS Closing");
3136 void sigchild_handler(int signal
)
3138 while (waitpid(-1, NULL
, WNOHANG
) > 0)
3148 char magic
[sizeof(DUMP_MAGIC
) - 1];
3151 if (!config
->save_state
)
3157 if (stat(STATEFILE
, &sb
) < 0)
3163 if (sb
.st_mtime
< (time(NULL
) - 60))
3165 log(0, 0, 0, 0, "State file is too old to read, ignoring\n");
3170 f
= fopen(STATEFILE
, "r");
3175 log(0, 0, 0, 0, "Can't read state file: %s\n", strerror(errno
));
3179 if (fread(magic
, sizeof(magic
), 1, f
) != 1 || strncmp(magic
, DUMP_MAGIC
, sizeof(magic
)))
3181 log(0, 0, 0, 0, "Bad state file magic\n");
3185 log(1, 0, 0, 0, "Reading state information\n");
3186 if (fread(buf
, sizeof(buf
), 1, f
) != 1 || buf
[0] > MAXIPPOOL
|| buf
[1] != sizeof(ippoolt
))
3188 log(0, 0, 0, 0, "Error/mismatch reading ip pool header from state file\n");
3192 if (buf
[0] > ip_pool_size
)
3194 log(0, 0, 0, 0, "ip pool has shrunk! state = %d, current = %d\n", buf
[0], ip_pool_size
);
3198 log(2, 0, 0, 0, "Loading %u ip addresses\n", buf
[0]);
3199 for (i
= 0; i
< buf
[0]; i
++)
3201 if (fread(&itmp
, sizeof(itmp
), 1, f
) != 1)
3203 log(0, 0, 0, 0, "Error reading ip %d from state file: %s\n", i
, strerror(errno
));
3207 if (itmp
.address
!= ip_address_pool
[i
].address
)
3209 log(0, 0, 0, 0, "Mismatched ip %d from state file: pool may only be extended\n", i
);
3213 memcpy(&ip_address_pool
[i
], &itmp
, sizeof(itmp
));
3216 if (fread(buf
, sizeof(buf
), 1, f
) != 1 || buf
[0] != MAXTUNNEL
|| buf
[1] != sizeof(tunnelt
))
3218 log(0, 0, 0, 0, "Error/mismatch reading tunnel header from state file\n");
3222 log(2, 0, 0, 0, "Loading %u tunnels\n", MAXTUNNEL
);
3223 if (fread(tunnel
, sizeof(tunnelt
), MAXTUNNEL
, f
) != MAXTUNNEL
)
3225 log(0, 0, 0, 0, "Error reading tunnel data from state file\n");
3229 for (i
= 0; i
< MAXTUNNEL
; i
++)
3231 tunnel
[i
].controlc
= 0;
3232 tunnel
[i
].controls
= NULL
;
3233 tunnel
[i
].controle
= NULL
;
3234 if (*tunnel
[i
].hostname
)
3235 log(3, 0, 0, 0, "Created tunnel for %s\n", tunnel
[i
].hostname
);
3238 if (fread(buf
, sizeof(buf
), 1, f
) != 1 || buf
[0] != MAXSESSION
|| buf
[1] != sizeof(sessiont
))
3240 log(0, 0, 0, 0, "Error/mismatch reading session header from state file\n");
3244 log(2, 0, 0, 0, "Loading %u sessions\n", MAXSESSION
);
3245 if (fread(session
, sizeof(sessiont
), MAXSESSION
, f
) != MAXSESSION
)
3247 log(0, 0, 0, 0, "Error reading session data from state file\n");
3251 for (i
= 0; i
< MAXSESSION
; i
++)
3253 session
[i
].tbf_in
= 0;
3254 session
[i
].tbf_out
= 0;
3255 if (session
[i
].opened
)
3257 log(2, 0, i
, 0, "Loaded active session for user %s\n", session
[i
].user
);
3259 sessionsetup(session
[i
].tunnel
, i
);
3264 log(0, 0, 0, 0, "Loaded saved state information\n");
3272 if (!config
->save_state
)
3277 if (!(f
= fopen(STATEFILE
, "w")))
3280 log(1, 0, 0, 0, "Dumping state information\n");
3282 if (fwrite(DUMP_MAGIC
, sizeof(DUMP_MAGIC
) - 1, 1, f
) != 1)
3285 log(2, 0, 0, 0, "Dumping %u ip addresses\n", ip_pool_size
);
3286 buf
[0] = ip_pool_size
;
3287 buf
[1] = sizeof(ippoolt
);
3288 if (fwrite(buf
, sizeof(buf
), 1, f
) != 1)
3290 if (fwrite(ip_address_pool
, sizeof(ippoolt
), ip_pool_size
, f
) != ip_pool_size
)
3293 log(2, 0, 0, 0, "Dumping %u tunnels\n", MAXTUNNEL
);
3295 buf
[1] = sizeof(tunnelt
);
3296 if (fwrite(buf
, sizeof(buf
), 1, f
) != 1)
3298 if (fwrite(tunnel
, sizeof(tunnelt
), MAXTUNNEL
, f
) != MAXTUNNEL
)
3301 log(2, 0, 0, 0, "Dumping %u sessions\n", MAXSESSION
);
3302 buf
[0] = MAXSESSION
;
3303 buf
[1] = sizeof(sessiont
);
3304 if (fwrite(buf
, sizeof(buf
), 1, f
) != 1)
3306 if (fwrite(session
, sizeof(sessiont
), MAXSESSION
, f
) != MAXSESSION
)
3314 log(0, 0, 0, 0, "Can't write state information: %s\n", strerror(errno
));
3318 void build_chap_response(char *challenge
, u8 id
, u16 challenge_length
, char **challenge_response
)
3321 *challenge_response
= NULL
;
3323 if (!*config
->l2tpsecret
)
3325 log(0, 0, 0, 0, "LNS requested CHAP authentication, but no l2tp secret is defined\n");
3329 log(4, 0, 0, 0, " Building challenge response for CHAP request\n");
3331 *challenge_response
= (char *)calloc(17, 1);
3334 MD5Update(&ctx
, &id
, 1);
3335 MD5Update(&ctx
, config
->l2tpsecret
, strlen(config
->l2tpsecret
));
3336 MD5Update(&ctx
, challenge
, challenge_length
);
3337 MD5Final(*challenge_response
, &ctx
);
3342 static int facility_value(char *name
)
3345 for (i
= 0; facilitynames
[i
].c_name
; i
++)
3347 if (strcmp(facilitynames
[i
].c_name
, name
) == 0)
3348 return facilitynames
[i
].c_val
;
3353 void update_config()
3356 static int timeout
= 0;
3357 static int interval
= 0;
3367 if (*config
->log_filename
)
3369 if (strstr(config
->log_filename
, "syslog:") == config
->log_filename
)
3371 char *p
= config
->log_filename
+ 7;
3374 openlog("l2tpns", LOG_PID
, facility_value(p
));
3378 else if (strchr(config
->log_filename
, '/') == config
->log_filename
)
3380 if ((log_stream
= fopen((char *)(config
->log_filename
), "a")))
3382 fseek(log_stream
, 0, SEEK_END
);
3383 setbuf(log_stream
, NULL
);
3387 log_stream
= stderr
;
3388 setbuf(log_stream
, NULL
);
3394 log_stream
= stderr
;
3395 setbuf(log_stream
, NULL
);
3400 config
->numradiusservers
= 0;
3401 for (i
= 0; i
< MAXRADSERVER
; i
++)
3402 if (config
->radiusserver
[i
])
3404 config
->numradiusservers
++;
3405 // Set radius port: if not set, take the port from the
3406 // first radius server. For the first radius server,
3407 // take the #defined default value from l2tpns.h
3409 // test twice, In case someone works with
3410 // a secondary radius server without defining
3411 // a primary one, this will work even then.
3412 if (i
>0 && !config
->radiusport
[i
])
3413 config
->radiusport
[i
] = config
->radiusport
[i
-1];
3414 if (!config
->radiusport
[i
])
3415 config
->radiusport
[i
] = RADPORT
;
3418 if (!config
->numradiusservers
)
3420 log(0, 0, 0, 0, "No RADIUS servers defined!\n");
3423 config
->num_radfds
= 2 << RADIUS_SHIFT
;
3426 for (i
= 0; i
< MAXPLUGINS
; i
++)
3428 if (strcmp(config
->plugins
[i
], config
->old_plugins
[i
]) == 0)
3430 if (*config
->plugins
[i
])
3433 add_plugin(config
->plugins
[i
]);
3435 else if (*config
->old_plugins
[i
])
3438 remove_plugin(config
->old_plugins
[i
]);
3441 memcpy(config
->old_plugins
, config
->plugins
, sizeof(config
->plugins
));
3442 if (!config
->cleanup_interval
) config
->cleanup_interval
= 10;
3443 if (!config
->multi_read_count
) config
->multi_read_count
= 10;
3444 if (!config
->cluster_address
) config
->cluster_address
= inet_addr(DEFAULT_MCAST_ADDR
);
3445 if (!*config
->cluster_interface
)
3446 strncpy(config
->cluster_interface
, DEFAULT_MCAST_INTERFACE
, sizeof(config
->cluster_interface
) - 1);
3448 if (!config
->cluster_hb_interval
)
3449 config
->cluster_hb_interval
= PING_INTERVAL
; // Heartbeat every 0.5 seconds.
3451 if (!config
->cluster_hb_timeout
)
3452 config
->cluster_hb_timeout
= HB_TIMEOUT
; // 10 missed heartbeat triggers an election.
3454 if (interval
!= config
->cluster_hb_interval
|| timeout
!= config
->cluster_hb_timeout
)
3456 // Paranoia: cluster_check_master() treats 2 x interval + 1 sec as
3457 // late, ensure we're sufficiently larger than that
3458 int t
= 4 * config
->cluster_hb_interval
+ 11;
3460 if (config
->cluster_hb_timeout
< t
)
3462 log(0,0,0,0, "Heartbeat timeout %d too low, adjusting to %d\n", config
->cluster_hb_timeout
, t
);
3463 config
->cluster_hb_timeout
= t
;
3466 // Push timing changes to the slaves immediately if we're the master
3467 if (config
->cluster_iam_master
)
3468 cluster_heartbeat();
3470 interval
= config
->cluster_hb_interval
;
3471 timeout
= config
->cluster_hb_timeout
;
3475 if (*config
->pid_file
== '/' && !config
->wrote_pid
)
3478 if ((f
= fopen(config
->pid_file
, "w")))
3480 fprintf(f
, "%d\n", getpid());
3482 config
->wrote_pid
= 1;
3486 log(0, 0, 0, 0, "Can't write to PID file %s: %s\n", config
->pid_file
, strerror(errno
));
3490 config
->reload_config
= 0;
3493 void read_config_file()
3497 if (!config
->config_file
) return;
3498 if (!(f
= fopen(config
->config_file
, "r")))
3500 fprintf(stderr
, "Can't open config file %s: %s\n", config
->config_file
, strerror(errno
));
3504 log(3, 0, 0, 0, "Reading config file %s\n", config
->config_file
);
3506 log(3, 0, 0, 0, "Done reading config file\n");
3511 int sessionsetup(tunnelidt t
, sessionidt s
)
3513 // A session now exists, set it up
3519 CSTAT(call_sessionsetup
);
3522 log(3, session
[s
].ip
, s
, t
, "Doing session setup for session\n");
3524 if (!session
[s
].ip
|| session
[s
].ip
== 0xFFFFFFFE)
3526 assign_ip_address(s
);
3528 log(3, 0, s
, t
, " No IP allocated. Assigned %s from pool\n",
3529 inet_toa(htonl(session
[s
].ip
)));
3531 log(0, 0, s
, t
, " No IP allocated. The IP address pool is FULL!\n");
3535 // Make sure this is right
3536 session
[s
].tunnel
= t
;
3538 // zap old sessions with same IP and/or username
3539 // Don't kill gardened sessions - doing so leads to a DoS
3540 // from someone who doesn't need to know the password
3543 user
= session
[s
].user
;
3544 for (i
= 1; i
<= config
->cluster_highest_sessionid
; i
++)
3546 if (i
== s
) continue;
3547 if (ip
== session
[i
].ip
) sessionkill(i
, "Duplicate IP address");
3548 if (!session
[s
].walled_garden
&& !session
[i
].walled_garden
&& strcasecmp(user
, session
[i
].user
) == 0)
3549 sessionkill(i
, "Duplicate session for users");
3553 // Add the route for this session.
3555 // Static IPs need to be routed. Anything else
3556 // is part of the IP address pool and is already routed,
3557 // it just needs to be added to the IP cache.
3558 if (session
[s
].ip_pool_index
== -1) // static ip
3559 routeset(s
, session
[s
].ip
, 0, 0, 1);
3561 cache_ipmap(session
[s
].ip
, s
);
3563 for (r
= 0; r
< MAXROUTE
&& session
[s
].route
[r
].ip
; r
++)
3564 routeset(s
, session
[s
].route
[r
].ip
, session
[s
].route
[r
].mask
, session
[s
].ip
, 1);
3566 if (!session
[s
].sid
)
3568 // did this session just finish radius?
3569 log(3, session
[s
].ip
, s
, t
, "Sending initial IPCP to client\n");
3571 session
[s
].sid
= ++last_sid
;
3574 // Run the plugin's against this new session.
3576 struct param_new_session data
= { &tunnel
[t
], &session
[s
] };
3577 run_plugins(PLUGIN_NEW_SESSION
, &data
);
3580 // Force throttling on or off (Actually : refresh the current throttling status)
3581 // This has the advantage of cleaning up after another throttled user who may have left
3582 // firewall rules lying around
3583 throttle_session(s
, session
[s
].throttle
);
3585 session
[s
].last_packet
= time_now
;
3588 char *sessionip
, *tunnelip
;
3589 sessionip
= strdup(inet_toa(htonl(session
[s
].ip
)));
3590 tunnelip
= strdup(inet_toa(htonl(tunnel
[t
].ip
)));
3591 log(2, session
[s
].ip
, s
, t
, "Login by %s at %s from %s (%s)\n",
3592 session
[s
].user
, sessionip
, tunnelip
, tunnel
[t
].hostname
);
3593 if (sessionip
) free(sessionip
);
3594 if (tunnelip
) free(tunnelip
);
3597 cluster_send_session(s
); // Mark it as dirty, and needing to the flooded to the cluster.
3599 return 1; // RADIUS OK and IP allocated, done...
3603 // This session just got dropped on us by the master or something.
3604 // Make sure our tables up up to date...
3606 int load_session(sessionidt s
, sessiont
*new)
3611 if (new->ip_pool_index
>= MAXIPPOOL
||
3612 new->tunnel
>= MAXTUNNEL
)
3614 log(0,0,s
,0, "Strange session update received!\n");
3615 // FIXME! What to do here?
3620 // Ok. All sanity checks passed. Now we're committed to
3621 // loading the new session.
3624 session
[s
].tunnel
= new->tunnel
; // For logging in cache_ipmap
3627 if (new->ip
!= session
[s
].ip
) // Changed ip. fix up hash tables.
3629 if (session
[s
].ip
) // If there's an old one, remove it.
3631 // Remove any routes if the IP has changed
3632 for (i
= 0; i
< MAXROUTE
&& session
[s
].route
[i
].ip
; i
++)
3634 routeset(s
, session
[s
].route
[i
].ip
, session
[s
].route
[i
].mask
, session
[s
].ip
, 0);
3635 session
[s
].route
[i
].ip
= 0;
3638 if (session
[s
].ip_pool_index
== -1) // static IP
3639 routeset(s
, session
[s
].ip
, 0, 0, 0);
3640 else // It's part of the IP pool, remove it manually.
3641 uncache_ipmap(session
[s
].ip
);
3646 // If there's a new one, add it.
3647 if (new->ip_pool_index
== -1)
3648 routeset(s
, new->ip
, 0, 0, 1);
3650 cache_ipmap(new->ip
, s
);
3654 // Update routed networks
3655 for (i
= 0; i
< MAXROUTE
&& (session
[s
].route
[i
].ip
|| new->route
[i
].ip
); i
++)
3657 if (new->route
[i
].ip
== session
[s
].route
[i
].ip
&&
3658 new->route
[i
].mask
== session
[s
].route
[i
].mask
)
3661 if (session
[s
].route
[i
].ip
) // Remove the old one if it exists.
3662 routeset(s
, session
[s
].route
[i
].ip
, session
[s
].route
[i
].mask
, session
[s
].ip
, 0);
3664 if (new->route
[i
].ip
) // Add the new one if it exists.
3665 routeset(s
, new->route
[i
].ip
, new->route
[i
].mask
, new->ip
, 1);
3668 if (new->tunnel
&& s
> config
->cluster_highest_sessionid
) // Maintain this in the slave. It's used
3669 // for walking the sessions to forward byte counts to the master.
3670 config
->cluster_highest_sessionid
= s
;
3672 memcpy(&session
[s
], new, sizeof(session
[s
])); // Copy over..
3674 // Do fixups into address pool.
3675 if (new->ip_pool_index
!= -1)
3676 fix_address_pool(s
);
3682 void ringbuffer_dump(FILE *stream
)
3684 int i
= ringbuffer
->head
;
3686 while (i
!= ringbuffer
->tail
)
3688 if (*ringbuffer
->buffer
[i
].message
)
3689 fprintf(stream
, "%d-%s", ringbuffer
->buffer
[i
].level
, ringbuffer
->buffer
[i
].message
);
3690 if (++i
== ringbuffer
->tail
) break;
3691 if (i
== RINGBUFFER_SIZE
) i
= 0;
3700 loaded_plugins
= ll_init();
3701 // Initialize the plugins to nothing
3702 for (i
= 0; i
< MAX_PLUGIN_TYPES
; i
++)
3703 plugins
[i
] = ll_init();
3706 static void *open_plugin(char *plugin_name
, int load
)
3708 char path
[256] = "";
3710 snprintf(path
, 256, PLUGINDIR
"/%s.so", plugin_name
);
3711 log(2, 0, 0, 0, "%soading plugin from %s\n", load
? "L" : "Un-l", path
);
3712 return dlopen(path
, RTLD_NOW
);
3715 void add_plugin(char *plugin_name
)
3717 static struct pluginfuncs funcs
= {
3722 sessiontbysessionidt
,
3723 sessionidtbysessiont
,
3729 void *p
= open_plugin(plugin_name
, 1);
3730 int (*initfunc
)(struct pluginfuncs
*);
3735 log(1, 0, 0, 0, " Plugin load failed: %s\n", dlerror());
3739 if (ll_contains(loaded_plugins
, p
))
3746 int *v
= dlsym(p
, "__plugin_api_version");
3747 if (!v
|| *v
!= PLUGIN_API_VERSION
)
3749 log(1, 0, 0, 0, " Plugin load failed: API version mismatch: %s\n", dlerror());
3755 if ((initfunc
= dlsym(p
, "plugin_init")))
3757 if (!initfunc(&funcs
))
3759 log(1, 0, 0, 0, " Plugin load failed: plugin_init() returned FALSE: %s\n", dlerror());
3765 ll_push(loaded_plugins
, p
);
3767 for (i
= 0; i
< max_plugin_functions
; i
++)
3770 if (plugin_functions
[i
] && (x
= dlsym(p
, plugin_functions
[i
])))
3772 log(3, 0, 0, 0, " Supports function \"%s\"\n", plugin_functions
[i
]);
3773 ll_push(plugins
[i
], x
);
3777 log(2, 0, 0, 0, " Loaded plugin %s\n", plugin_name
);
3780 static void run_plugin_done(void *plugin
)
3782 int (*donefunc
)(void) = dlsym(plugin
, "plugin_done");
3788 void remove_plugin(char *plugin_name
)
3790 void *p
= open_plugin(plugin_name
, 0);
3796 for (i
= 0; i
< max_plugin_functions
; i
++)
3799 if (plugin_functions
[i
] && (x
= dlsym(p
, plugin_functions
[i
])))
3800 ll_delete(plugins
[i
], x
);
3803 if (ll_contains(loaded_plugins
, p
))
3805 ll_delete(loaded_plugins
, p
);
3810 log(2, 0, 0, 0, "Removed plugin %s\n", plugin_name
);
3813 int run_plugins(int plugin_type
, void *data
)
3815 int (*func
)(void *data
);
3816 if (!plugins
[plugin_type
] || plugin_type
> max_plugin_functions
) return 1;
3818 ll_reset(plugins
[plugin_type
]);
3819 while ((func
= ll_next(plugins
[plugin_type
])))
3823 if (rc
== PLUGIN_RET_STOP
) return 1;
3824 if (rc
== PLUGIN_RET_ERROR
) return 0;
3833 ll_reset(loaded_plugins
);
3834 while ((p
= ll_next(loaded_plugins
)))
3838 void processcontrol(u8
* buf
, int len
, struct sockaddr_in
*addr
)
3842 struct param_control param
= { buf
, len
, ntohl(addr
->sin_addr
.s_addr
), ntohs(addr
->sin_port
), NULL
, 0, 0 };
3845 if (log_stream
&& config
->debug
>= 4)
3847 log(4, ntohl(addr
->sin_addr
.s_addr
), 0, 0, "Received ");
3848 dump_packet(buf
, log_stream
);
3851 resp
= calloc(1400, 1);
3852 l
= new_packet(PKT_RESP_ERROR
, resp
);
3853 *(int *)(resp
+ 6) = *(int *)(buf
+ 6);
3855 param
.type
= ntohs(*(short *)(buf
+ 2));
3856 param
.id
= ntohl(*(int *)(buf
+ 6));
3857 param
.data_length
= ntohs(*(short *)(buf
+ 4)) - 10;
3858 param
.data
= (param
.data_length
> 0) ? (char *)(buf
+ 10) : NULL
;
3859 param
.response
= resp
;
3860 param
.response_length
= l
;
3862 run_plugins(PLUGIN_CONTROL
, ¶m
);
3864 if (param
.send_response
)
3866 send_packet(controlfd
, ntohl(addr
->sin_addr
.s_addr
), ntohs(addr
->sin_port
), param
.response
, param
.response_length
);
3867 log(4, ntohl(addr
->sin_addr
.s_addr
), 0, 0, "Sent Control packet response\n");
3875 * Go through all of the tunnels and do some cleanups
3881 log(1, 0, 0, 0, "Cleaning tunnels array\n");
3883 for (i
= 1; i
< MAXTUNNEL
; i
++)
3886 || !*tunnel
[i
].hostname
3887 || (tunnel
[i
].state
== TUNNELDIE
&& tunnel
[i
].die
>= time_now
))
3894 void tunnelclear(tunnelidt t
)
3897 memset(&tunnel
[t
], 0, sizeof(tunnel
[t
]));
3898 tunnel
[t
].state
= TUNNELFREE
;
3901 tunnelidt
new_tunnel()
3904 for (i
= 1; i
< MAXTUNNEL
; i
++)
3906 if (tunnel
[i
].state
== TUNNELFREE
)
3908 log(4, 0, 0, i
, "Assigning tunnel ID %d\n", i
);
3909 if (i
> config
->cluster_highest_tunnelid
)
3910 config
->cluster_highest_tunnelid
= i
;
3914 log(0, 0, 0, 0, "Can't find a free tunnel! There shouldn't be this many in use!\n");
3919 // We're becoming the master. Do any required setup..
3921 // This is principally telling all the plugins that we're
3922 // now a master, and telling them about all the sessions
3923 // that are active too..
3925 void become_master(void)
3928 run_plugins(PLUGIN_BECOME_MASTER
, NULL
);
3930 for (s
= 1; s
<= config
->cluster_highest_sessionid
; ++s
)
3932 if (!session
[s
].tunnel
) // Not an in-use session.
3935 run_plugins(PLUGIN_NEW_SESSION_MASTER
, &session
[s
]);
3941 int cmd_show_hist_idle(struct cli_def
*cli
, char *command
, char **argv
, int argc
)
3947 if (CLI_HELP_REQUESTED
)
3948 return CLI_HELP_NO_ARGS
;
3951 for (i
= 0; i
< 64;++i
) buckets
[i
] = 0;
3953 for (s
= 1; s
<= config
->cluster_highest_sessionid
; ++s
)
3956 if (!session
[s
].tunnel
)
3959 idle
= time_now
- session
[s
].last_packet
;
3960 idle
/= 5 ; // In multiples of 5 seconds.
3970 for (i
= 0; i
< 63; ++i
)
3972 cli_print(cli
, "%3d seconds : %7.2f%% (%6d)", i
* 5, (double) buckets
[i
] * 100.0 / count
, buckets
[i
]);
3974 cli_print(cli
, "lots of secs : %7.2f%% (%6d)", (double) buckets
[63] * 100.0 / count
, buckets
[i
]);
3975 cli_print(cli
, "%d total sessions open.", count
);
3979 int cmd_show_hist_open(struct cli_def
*cli
, char *command
, char **argv
, int argc
)
3985 if (CLI_HELP_REQUESTED
)
3986 return CLI_HELP_NO_ARGS
;
3989 for (i
= 0; i
< 64;++i
) buckets
[i
] = 0;
3991 for (s
= 1; s
<= config
->cluster_highest_sessionid
; ++s
)
3994 if (!session
[s
].tunnel
)
3997 d
= time_now
- session
[s
].opened
;
4000 while (d
> 1 && open
< 32)
4010 for (i
= 0; i
< 30; ++i
)
4012 cli_print(cli
, " < %8d seconds : %7.2f%% (%6d)", s
, (double) buckets
[i
] * 100.0 / count
, buckets
[i
]);
4015 cli_print(cli
, "%d total sessions open.", count
);