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 1.22 2004-08-13 00:02:50 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
) {
546 for (j
= 0; j
< 256; ++j
) {
549 for (k
= 0; k
< 256; ++k
) {
552 for (l
= 0; l
< 256; ++l
) {
554 cli_print(cli
, "%7d %d.%d.%d.%d", (int) g
[l
], i
, j
, k
, l
);
560 cli_print(cli
, "%d entries in cache", count
);
565 // Find session by username, 0 for not found
566 // walled garden users aren't authenticated, so the username is
567 // reasonably useless. Ignore them to avoid incorrect actions
569 // This is VERY inefficent. Don't call it often. :)
571 sessionidt
sessionbyuser(char *username
)
574 CSTAT(call_sessionbyuser
);
576 for (s
= 1; s
< MAXSESSION
; ++s
) {
577 if (session
[s
].walled_garden
)
578 continue; // Skip walled garden users.
580 if (!strncmp(session
[s
].user
, username
, 128))
584 return 0; // Not found.
587 void send_garp(ipt ip
)
593 s
= socket(PF_INET
, SOCK_DGRAM
, 0);
596 log(0, 0, 0, 0, "Error creating socket for GARP: %s\n", strerror(errno
));
599 memset(&ifr
, 0, sizeof(ifr
));
600 strncpy(ifr
.ifr_name
, "eth0", sizeof(ifr
.ifr_name
) - 1);
601 if (ioctl(s
, SIOCGIFHWADDR
, &ifr
) < 0)
603 log(0, 0, 0, 0, "Error getting eth0 hardware address for GARP: %s\n", strerror(errno
));
607 memcpy(mac
, &ifr
.ifr_hwaddr
.sa_data
, 6*sizeof(char));
608 if (ioctl(s
, SIOCGIFINDEX
, &ifr
) < 0)
610 log(0, 0, 0, 0, "Error getting eth0 interface index for GARP: %s\n", strerror(errno
));
615 sendarp(ifr
.ifr_ifindex
, mac
, ip
);
618 // Find session by username, 0 for not found
619 sessiont
*sessiontbysessionidt(sessionidt s
)
621 if (!s
|| s
> MAXSESSION
) return NULL
;
625 sessionidt
sessionidtbysessiont(sessiont
*s
)
627 sessionidt val
= s
-session
;
628 if (s
< session
|| val
> MAXSESSION
) return 0;
632 // actually send a control message for a specific tunnel
633 void tunnelsend(u8
* buf
, u16 l
, tunnelidt t
)
635 struct sockaddr_in addr
;
637 CSTAT(call_tunnelsend
);
641 static int backtrace_count
= 0;
642 log(0, 0, 0, t
, "tunnelsend called with 0 as tunnel id\n");
643 STAT(tunnel_tx_errors
);
644 log_backtrace(backtrace_count
, 5)
650 static int backtrace_count
= 0;
651 log(1, 0, 0, t
, "Error sending data out tunnel: no remote endpoint (tunnel not set up)\n");
652 log_backtrace(backtrace_count
, 5)
653 STAT(tunnel_tx_errors
);
656 memset(&addr
, 0, sizeof(addr
));
657 addr
.sin_family
= AF_INET
;
658 *(u32
*) & addr
.sin_addr
= htonl(tunnel
[t
].ip
);
659 addr
.sin_port
= htons(tunnel
[t
].port
);
661 // sequence expected, if sequence in message
662 if (*buf
& 0x08) *(u16
*) (buf
+ ((*buf
& 0x40) ? 10 : 8)) = htons(tunnel
[t
].nr
);
664 // If this is a control message, deal with retries
667 tunnel
[t
].last
= time_now
; // control message sent
668 tunnel
[t
].retry
= backoff(tunnel
[t
].try); // when to resend
669 if (tunnel
[t
].try > 1)
671 STAT(tunnel_retries
);
672 log(3, tunnel
[t
].ip
, 0, t
, "Control message resend try %d\n", tunnel
[t
].try);
676 if (sendto(udpfd
, buf
, l
, 0, (void *) &addr
, sizeof(addr
)) < 0)
678 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",
679 strerror(errno
), udpfd
, buf
, l
, inet_ntoa(addr
.sin_addr
));
680 STAT(tunnel_tx_errors
);
684 log_hex(5, "Send Tunnel Data", buf
, l
);
685 STAT(tunnel_tx_packets
);
686 INC_STAT(tunnel_tx_bytes
, l
);
690 // Tiny helper function to write data to
693 int tun_write(u8
* data
, int size
)
695 return write(tunfd
, data
, size
);
698 // process outgoing (to tunnel) IP
700 void processipout(u8
* buf
, int len
)
707 char * data
= buf
; // Keep a copy of the originals.
712 CSTAT(call_processipout
);
714 if (len
< MIN_IP_SIZE
)
716 log(1, 0, 0, 0, "Short IP, %d bytes\n", len
);
717 STAT(tunnel_tx_errors
);
722 log(1, 0, 0, 0, "Oversize IP packet %d bytes\n", len
);
723 STAT(tunnel_tx_errors
);
727 // Skip the tun header
731 // Got an IP header now
732 if (*(u8
*)(buf
) >> 4 != 4)
734 log(1, 0, 0, 0, "IP: Don't understand anything except IPv4\n");
738 ip
= *(u32
*)(buf
+ 16);
739 if (!(s
= sessionbyip(ip
)))
741 // Is this a packet for a session that doesn't exist?
742 static int rate
= 0; // Number of ICMP packets we've sent this second.
743 static int last
= 0; // Last time we reset the ICMP packet counter 'rate'.
745 if (last
!= time_now
) {
750 if (rate
++ < config
->icmp_rate
) // Only send a max of icmp_rate per second.
752 log(4, 0, 0, 0, "IP: Sending ICMP host unreachable to %s\n", inet_toa(*(u32
*)(buf
+ 12)));
753 host_unreachable(*(u32
*)(buf
+ 12), *(u16
*)(buf
+ 4), ip
, buf
, (len
< 64) ? 64 : len
);
757 t
= session
[s
].tunnel
;
762 // Are we throttling this session?
763 if (config
->cluster_iam_master
)
764 tbf_queue_packet(sp
->tbf_out
, data
, size
);
766 master_throttle_packet(sp
->tbf_out
, data
, size
);
769 else if (sp
->walled_garden
&& !config
->cluster_iam_master
)
771 // We are walled-gardening this
772 master_garden_packet(s
, data
, size
);
776 // Snooping this session, send it to intercept box
777 if (sp
->snoop_ip
&& sp
->snoop_port
)
778 snoop_send_packet(buf
, len
, sp
->snoop_ip
, sp
->snoop_port
);
780 log(5, session
[s
].ip
, s
, t
, "Ethernet -> Tunnel (%d bytes)\n", len
);
782 // Add on L2TP header
784 u8
*p
= makeppp(b
, sizeof(b
), buf
, len
, t
, s
, PPPIP
);
786 log(3, session
[s
].ip
, s
, t
, "failed to send packet in processipout.\n");
789 tunnelsend(b
, len
+ (p
-b
), t
); // send it...
792 sp
->cout
+= len
; // byte count
793 sp
->total_cout
+= len
; // byte count
796 sess_count
[s
].cout
+= len
; // To send to master..
800 // Helper routine for the TBF filters.
801 // Used to send queued data in to the user!
803 void send_ipout(sessionidt s
, u8
*buf
, int len
)
811 if (len
< 0 || len
> MAXETHER
) {
812 log(1,0,0,0, "Odd size IP packet: %d bytes\n", len
);
816 // Skip the tun header
820 ip
= *(u32
*)(buf
+ 16);
824 t
= session
[s
].tunnel
;
827 log(5, session
[s
].ip
, s
, t
, "Ethernet -> Tunnel (%d bytes)\n", len
);
829 // Snooping this session.
830 if (sp
->snoop_ip
&& sp
->snoop_port
)
831 snoop_send_packet(buf
, len
, sp
->snoop_ip
, sp
->snoop_port
);
833 // Add on L2TP header
835 u8
*p
= makeppp(b
, sizeof(b
), buf
, len
, t
, s
, PPPIP
);
837 log(3, session
[s
].ip
, s
, t
, "failed to send packet in send_ipout.\n");
840 tunnelsend(b
, len
+ (p
-b
), t
); // send it...
842 sp
->cout
+= len
; // byte count
843 sp
->total_cout
+= len
; // byte count
846 sess_count
[s
].cout
+= len
; // To send to master..
849 // add an AVP (16 bit)
850 void control16(controlt
* c
, u16 avp
, u16 val
, u8 m
)
852 u16 l
= (m
? 0x8008 : 0x0008);
853 *(u16
*) (c
->buf
+ c
->length
+ 0) = htons(l
);
854 *(u16
*) (c
->buf
+ c
->length
+ 2) = htons(0);
855 *(u16
*) (c
->buf
+ c
->length
+ 4) = htons(avp
);
856 *(u16
*) (c
->buf
+ c
->length
+ 6) = htons(val
);
860 // add an AVP (32 bit)
861 void control32(controlt
* c
, u16 avp
, u32 val
, u8 m
)
863 u16 l
= (m
? 0x800A : 0x000A);
864 *(u16
*) (c
->buf
+ c
->length
+ 0) = htons(l
);
865 *(u16
*) (c
->buf
+ c
->length
+ 2) = htons(0);
866 *(u16
*) (c
->buf
+ c
->length
+ 4) = htons(avp
);
867 *(u32
*) (c
->buf
+ c
->length
+ 6) = htonl(val
);
871 // add an AVP (32 bit)
872 void controls(controlt
* c
, u16 avp
, char *val
, u8 m
)
874 u16 l
= ((m
? 0x8000 : 0) + strlen(val
) + 6);
875 *(u16
*) (c
->buf
+ c
->length
+ 0) = htons(l
);
876 *(u16
*) (c
->buf
+ c
->length
+ 2) = htons(0);
877 *(u16
*) (c
->buf
+ c
->length
+ 4) = htons(avp
);
878 memcpy(c
->buf
+ c
->length
+ 6, val
, strlen(val
));
879 c
->length
+= 6 + strlen(val
);
883 void controlb(controlt
* c
, u16 avp
, char *val
, unsigned int len
, u8 m
)
885 u16 l
= ((m
? 0x8000 : 0) + len
+ 6);
886 *(u16
*) (c
->buf
+ c
->length
+ 0) = htons(l
);
887 *(u16
*) (c
->buf
+ c
->length
+ 2) = htons(0);
888 *(u16
*) (c
->buf
+ c
->length
+ 4) = htons(avp
);
889 memcpy(c
->buf
+ c
->length
+ 6, val
, len
);
890 c
->length
+= 6 + len
;
893 // new control connection
894 controlt
*controlnew(u16 mtype
)
898 c
= malloc(sizeof(controlt
));
902 controlfree
= c
->next
;
906 *(u16
*) (c
->buf
+ 0) = htons(0xC802); // flags/ver
908 control16(c
, 0, mtype
, 1);
912 // send zero block if nothing is waiting
914 void controlnull(tunnelidt t
)
917 if (tunnel
[t
].controlc
) // Messages queued; They will carry the ack.
920 *(u16
*) (buf
+ 0) = htons(0xC802); // flags/ver
921 *(u16
*) (buf
+ 2) = htons(12); // length
922 *(u16
*) (buf
+ 4) = htons(tunnel
[t
].far
); // tunnel
923 *(u16
*) (buf
+ 6) = htons(0); // session
924 *(u16
*) (buf
+ 8) = htons(tunnel
[t
].ns
); // sequence
925 *(u16
*) (buf
+ 10) = htons(tunnel
[t
].nr
); // sequence
926 tunnelsend(buf
, 12, t
);
929 // add a control message to a tunnel, and send if within window
930 void controladd(controlt
* c
, tunnelidt t
, sessionidt s
)
932 *(u16
*) (c
->buf
+ 2) = htons(c
->length
); // length
933 *(u16
*) (c
->buf
+ 4) = htons(tunnel
[t
].far
); // tunnel
934 *(u16
*) (c
->buf
+ 6) = htons(s
? session
[s
].far
: 0); // session
935 *(u16
*) (c
->buf
+ 8) = htons(tunnel
[t
].ns
); // sequence
936 tunnel
[t
].ns
++; // advance sequence
937 // link in message in to queue
938 if (tunnel
[t
].controlc
)
939 tunnel
[t
].controle
->next
= c
;
941 tunnel
[t
].controls
= c
;
942 tunnel
[t
].controle
= c
;
943 tunnel
[t
].controlc
++;
944 // send now if space in window
945 if (tunnel
[t
].controlc
<= tunnel
[t
].window
)
947 tunnel
[t
].try = 0; // first send
948 tunnelsend(c
->buf
, c
->length
, t
);
953 // Throttle or Unthrottle a session
955 // Throttle the data folling through a session
956 // to be no more than 'throttle' kbit/sec each way.
958 int throttle_session(sessionidt s
, int throttle
)
960 if (!session
[s
].tunnel
)
961 return 0; // No-one home.
963 if (!*session
[s
].user
)
964 return 0; // User not logged in
967 if (session
[s
].tbf_in
|| session
[s
].tbf_out
) {
968 if (throttle
== session
[s
].throttle
)
971 // Currently throttled but the rate is changing.
973 free_tbf(session
[s
].tbf_in
);
974 free_tbf(session
[s
].tbf_out
);
977 session
[s
].tbf_in
= new_tbf(s
, throttle
*1024/4, throttle
*1024/8, send_ipin
);
978 session
[s
].tbf_out
= new_tbf(s
, throttle
*1024/4, throttle
*1024/8, send_ipout
);
980 if (throttle
!= session
[s
].throttle
) { // Changed. Flood to slaves.
981 session
[s
].throttle
= throttle
;
982 cluster_send_session(s
);
988 // else Unthrottling.
990 if (!session
[s
].tbf_in
&& !session
[s
].tbf_out
&& !session
[s
].throttle
)
993 free_tbf(session
[s
].tbf_in
);
994 session
[s
].tbf_in
= 0;
996 free_tbf(session
[s
].tbf_out
);
997 session
[s
].tbf_out
= 0;
999 if (throttle
!= session
[s
].throttle
) { // Changed. Flood to slaves.
1000 session
[s
].throttle
= throttle
;
1001 cluster_send_session(s
);
1007 // start tidy shutdown of session
1008 void sessionshutdown(sessionidt s
, char *reason
)
1010 int dead
= session
[s
].die
;
1011 int walled_garden
= session
[s
].walled_garden
;
1014 CSTAT(call_sessionshutdown
);
1016 if (!session
[s
].tunnel
)
1018 log(3, session
[s
].ip
, s
, session
[s
].tunnel
, "Called sessionshutdown on a session with no tunnel.\n");
1019 return; // not a live session
1023 log(2, 0, s
, session
[s
].tunnel
, "Shutting down session %d: %s\n", s
, reason
);
1025 session
[s
].die
= now() + 150; // Clean up in 15 seconds
1028 struct param_kill_session data
= { &tunnel
[session
[s
].tunnel
], &session
[s
] };
1029 run_plugins(PLUGIN_KILL_SESSION
, &data
);
1032 // RADIUS Stop message
1033 if (session
[s
].opened
&& !walled_garden
&& !dead
) {
1034 u16 r
= session
[s
].radius
;
1037 if (!(r
= radiusnew(s
)))
1039 log(1, 0, s
, session
[s
].tunnel
, "No free RADIUS sessions for Stop message\n");
1040 STAT(radius_overflow
);
1045 for (n
= 0; n
< 15; n
++)
1046 radius
[r
].auth
[n
] = rand();
1049 if (r
&& radius
[r
].state
!= RADIUSSTOP
)
1050 radiussend(r
, RADIUSSTOP
); // stop, if not already trying
1054 { // IP allocated, clear and unroute
1056 for (r
= 0; r
< MAXROUTE
&& session
[s
].route
[r
].ip
; r
++)
1058 routeset(s
, session
[s
].route
[r
].ip
, session
[s
].route
[r
].mask
, session
[s
].ip
, 0);
1059 session
[s
].route
[r
].ip
= 0;
1062 if (session
[s
].ip_pool_index
== -1) // static ip
1064 routeset(s
, session
[s
].ip
, 0, 0, 0); // Delete route.
1070 if (session
[s
].throttle
) // Unthrottle if throttled.
1071 throttle_session(s
, 0);
1074 controlt
*c
= controlnew(14); // sending CDN
1075 control16(c
, 1, 3, 1); // result code (admin reasons - TBA make error, general error, add message
1076 control16(c
, 14, s
, 1); // assigned session (our end)
1077 controladd(c
, session
[s
].tunnel
, s
); // send the message
1079 cluster_send_session(s
);
1082 void sendipcp(tunnelidt t
, sessionidt s
)
1085 u16 r
= session
[s
].radius
;
1088 CSTAT(call_sendipcp
);
1093 if (radius
[r
].state
!= RADIUSIPCP
)
1095 radius
[r
].state
= RADIUSIPCP
;
1099 radius
[r
].retry
= backoff(radius
[r
].try++);
1100 if (radius
[r
].try > 10)
1102 radiusclear(r
, s
); // Clear radius session.
1103 sessionshutdown(s
, "No reply on IPCP");
1107 q
= makeppp(buf
,sizeof(buf
), 0, 0, t
, s
, PPPIPCP
);
1109 log(3, session
[s
].ip
, s
, t
, "failed to send packet in sendipcp.\n");
1114 q
[1] = r
<< RADIUS_SHIFT
; // ID, dont care, we only send one type of request
1115 *(u16
*) (q
+ 2) = htons(10);
1118 *(u32
*) (q
+ 6) = config
->bind_address
? config
->bind_address
: my_address
; // send my IP
1119 tunnelsend(buf
, 10 + (q
- buf
), t
); // send it
1120 session
[s
].flags
&= ~SF_IPCP_ACKED
; // Clear flag.
1123 // kill a session now
1124 void sessionkill(sessionidt s
, char *reason
)
1127 CSTAT(call_sessionkill
);
1129 session
[s
].die
= now();
1130 sessionshutdown(s
, reason
); // close radius/routes, etc.
1131 if (session
[s
].radius
)
1132 radiusclear(session
[s
].radius
, s
); // cant send clean accounting data, session is killed
1134 log(2, 0, s
, session
[s
].tunnel
, "Kill session %d (%s): %s\n", s
, session
[s
].user
, reason
);
1136 throttle_session(s
, 0); // Force session to be un-throttle. Free'ing TBF structures.
1138 memset(&session
[s
], 0, sizeof(session
[s
]));
1139 session
[s
].tunnel
= T_FREE
; // Mark it as free.
1140 session
[s
].next
= sessionfree
;
1142 cli_session_actions
[s
].action
= 0;
1143 cluster_send_session(s
);
1146 // kill a tunnel now
1147 void tunnelkill(tunnelidt t
, char *reason
)
1152 CSTAT(call_tunnelkill
);
1154 tunnel
[t
].state
= TUNNELDIE
;
1156 // free control messages
1157 while ((c
= tunnel
[t
].controls
))
1159 controlt
* n
= c
->next
;
1160 tunnel
[t
].controls
= n
;
1161 tunnel
[t
].controlc
--;
1162 c
->next
= controlfree
;
1166 for (s
= 1; s
< MAXSESSION
; s
++)
1167 if (session
[s
].tunnel
== t
)
1168 sessionkill(s
, reason
);
1172 log(1, 0, 0, t
, "Kill tunnel %d: %s\n", t
, reason
);
1173 cli_tunnel_actions
[s
].action
= 0;
1174 cluster_send_tunnel(t
);
1177 // shut down a tunnel cleanly
1178 void tunnelshutdown(tunnelidt t
, char *reason
)
1182 CSTAT(call_tunnelshutdown
);
1184 if (!tunnel
[t
].last
|| !tunnel
[t
].far
|| tunnel
[t
].state
== TUNNELFREE
)
1186 // never set up, can immediately kill
1187 tunnelkill(t
, reason
);
1190 log(1, 0, 0, t
, "Shutting down tunnel %d (%s)\n", t
, reason
);
1193 for (s
= 1; s
< MAXSESSION
; s
++)
1194 if (session
[s
].tunnel
== t
)
1195 sessionkill(s
, reason
);
1197 tunnel
[t
].state
= TUNNELDIE
;
1198 tunnel
[t
].die
= now() + 700; // Clean up in 70 seconds
1199 cluster_send_tunnel(t
);
1200 // TBA - should we wait for sessions to stop?
1202 controlt
*c
= controlnew(4); // sending StopCCN
1203 control16(c
, 1, 1, 1); // result code (admin reasons - TBA make error, general error, add message
1204 control16(c
, 9, t
, 1); // assigned tunnel (our end)
1205 controladd(c
, t
, 0); // send the message
1209 // read and process packet on tunnel (UDP)
1210 void processudp(u8
* buf
, int len
, struct sockaddr_in
*addr
)
1212 char *chapresponse
= NULL
;
1213 u16 l
= len
, t
= 0, s
= 0, ns
= 0, nr
= 0;
1217 CSTAT(call_processudp
);
1221 log_hex(5, "UDP Data", buf
, len
);
1222 STAT(tunnel_rx_packets
);
1223 INC_STAT(tunnel_rx_bytes
, len
);
1226 log(1, ntohl(addr
->sin_addr
.s_addr
), 0, 0, "Short UDP, %d bytes\n", len
);
1227 STAT(tunnel_rx_errors
);
1230 if ((buf
[1] & 0x0F) != 2)
1232 log(1, ntohl(addr
->sin_addr
.s_addr
), 0, 0, "Bad L2TP ver %d\n", (buf
[1] & 0x0F) != 2);
1233 STAT(tunnel_rx_errors
);
1238 l
= ntohs(*(u16
*) p
);
1241 t
= ntohs(*(u16
*) p
);
1243 s
= ntohs(*(u16
*) p
);
1245 if (s
>= MAXSESSION
)
1247 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Received UDP packet with invalid session ID\n");
1248 STAT(tunnel_rx_errors
);
1253 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Received UDP packet with invalid tunnel ID\n");
1254 STAT(tunnel_rx_errors
);
1259 ns
= ntohs(*(u16
*) p
);
1261 nr
= ntohs(*(u16
*) p
);
1266 u16 o
= ntohs(*(u16
*) p
);
1271 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Bad length %d>%d\n", (p
- buf
), l
);
1272 STAT(tunnel_rx_errors
);
1278 u16 message
= 0xFFFF; // message type
1280 u8 mandatorymessage
= 0;
1281 u8 chap
= 0; // if CHAP being used
1282 u16 asession
= 0; // assigned session
1283 u32 amagic
= 0; // magic number
1284 u8 aflags
= 0; // flags from last LCF
1285 u16 version
= 0x0100; // protocol version (we handle 0.0 as well and send that back just in case)
1286 int requestchap
= 0; // do we request PAP instead of original CHAP request?
1287 char called
[MAXTEL
] = ""; // called number
1288 char calling
[MAXTEL
] = ""; // calling number
1290 if (!config
->cluster_iam_master
) {
1291 master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
);
1295 if ((*buf
& 0xCA) != 0xC8)
1297 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Bad control header %02X\n", *buf
);
1298 STAT(tunnel_rx_errors
);
1301 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",
1302 l
, tunnel
[t
].controlc
, tunnel
[t
].ns
, tunnel
[t
].nr
, ns
, nr
);
1303 // if no tunnel specified, assign one
1309 // Is this a duplicate of the first packet? (SCCRQ)
1311 for ( i
= 1; i
<= config
->cluster_highest_tunnelid
; ++i
) {
1312 if (tunnel
[i
].state
!= TUNNELOPENING
||
1313 tunnel
[i
].ip
!= ntohl(*(ipt
*) & addr
->sin_addr
) ||
1314 tunnel
[i
].port
!= ntohs(addr
->sin_port
) )
1322 if (!(t
= new_tunnel()))
1324 log(1, ntohl(addr
->sin_addr
.s_addr
), 0, 0, "No more tunnels\n");
1325 STAT(tunnel_overflow
);
1329 tunnel
[t
].ip
= ntohl(*(ipt
*) & addr
->sin_addr
);
1330 tunnel
[t
].port
= ntohs(addr
->sin_port
);
1331 tunnel
[t
].window
= 4; // default window
1332 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
);
1333 STAT(tunnel_created
);
1336 // This is used to time out old tunnels
1337 tunnel
[t
].lastrec
= time_now
;
1339 // check sequence of this message
1341 int skip
= tunnel
[t
].window
; // track how many in-window packets are still in queue
1342 // some to clear maybe?
1343 while (tunnel
[t
].controlc
&& (((tunnel
[t
].ns
- tunnel
[t
].controlc
) - nr
) & 0x8000))
1345 controlt
*c
= tunnel
[t
].controls
;
1346 tunnel
[t
].controls
= c
->next
;
1347 tunnel
[t
].controlc
--;
1348 c
->next
= controlfree
;
1351 tunnel
[t
].try = 0; // we have progress
1354 // If the 'ns' just received is not the 'nr' we're
1355 // expecting, just send an ack and drop it.
1357 // if 'ns' is less, then we got a retransmitted packet.
1358 // if 'ns' is greater than missed a packet. Either way
1359 // we should ignore it.
1360 if (ns
!= tunnel
[t
].nr
)
1362 // is this the sequence we were expecting?
1363 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
);
1364 STAT(tunnel_rx_errors
);
1366 if (l
) // Is this not a ZLB?
1370 // receiver advance (do here so quoted correctly in any sends below)
1371 if (l
) tunnel
[t
].nr
= (ns
+ 1);
1372 if (skip
< 0) skip
= 0;
1373 if (skip
< tunnel
[t
].controlc
)
1375 // some control packets can now be sent that were previous stuck out of window
1376 int tosend
= tunnel
[t
].window
- skip
;
1377 controlt
*c
= tunnel
[t
].controls
;
1385 tunnel
[t
].try = 0; // first send
1386 tunnelsend(c
->buf
, c
->length
, t
);
1391 if (!tunnel
[t
].controlc
)
1392 tunnel
[t
].retry
= 0; // caught up
1395 { // if not a null message
1397 while (l
&& !(fatal
& 0x80))
1399 u16 n
= (ntohs(*(u16
*) p
) & 0x3FF);
1406 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Invalid length in AVP\n");
1407 STAT(tunnel_rx_errors
);
1414 // handle hidden AVPs
1415 if (!*config
->l2tpsecret
)
1417 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Hidden AVP requested, but no L2TP secret.\n");
1421 if (!session
[s
].random_vector_length
)
1423 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Hidden AVP requested, but no random vector.\n");
1427 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Hidden AVP\n");
1431 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Unrecognised AVP flags %02X\n", *b
);
1438 log(2, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Unknown AVP vendor %d\n", ntohs(*(u16
*) (b
)));
1443 mtype
= ntohs(*(u16
*) (b
));
1447 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " AVP %d (%s) len %d\n", mtype
, avpnames
[mtype
], n
);
1450 case 0: // message type
1451 message
= ntohs(*(u16
*) b
);
1452 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Message type = %d (%s)\n", *b
,
1453 l2tp_message_types
[message
]);
1454 mandatorymessage
= flags
;
1456 case 1: // result code
1458 u16 rescode
= ntohs(*(u16
*)(b
));
1459 const char* resdesc
= "(unknown)";
1460 if (message
== 4) { /* StopCCN */
1461 if (rescode
<= MAX_STOPCCN_RESULT_CODE
)
1462 resdesc
= stopccn_result_codes
[rescode
];
1463 } else if (message
== 14) { /* CDN */
1464 if (rescode
<= MAX_CDN_RESULT_CODE
)
1465 resdesc
= cdn_result_codes
[rescode
];
1468 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Result Code %d: %s\n",
1471 u16 errcode
= ntohs(*(u16
*)(b
+ 2));
1472 const char* errdesc
= "(unknown)";
1473 if (errcode
<= MAX_ERROR_CODE
)
1474 errdesc
= error_codes
[errcode
];
1475 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Error Code %d: %s\n",
1479 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Error String: %.*s\n",
1485 case 2: // protocol version
1487 version
= ntohs(*(u16
*) (b
));
1488 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Protocol version = %d\n", version
);
1489 if (version
&& version
!= 0x0100)
1490 { // allow 0.0 and 1.0
1491 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Bad protocol version %04X\n",
1498 case 3: // framing capabilities
1499 // log(4, ntohl(addr->sin_addr.s_addr), s, t, "Framing capabilities\n");
1501 case 4: // bearer capabilities
1502 // log(4, ntohl(addr->sin_addr.s_addr), s, t, "Bearer capabilities\n");
1504 case 5: // tie breaker
1505 // We never open tunnels, so we don't care about tie breakers
1506 // log(4, ntohl(addr->sin_addr.s_addr), s, t, "Tie breaker\n");
1508 case 6: // firmware revision
1509 // log(4, ntohl(addr->sin_addr.s_addr), s, t, "Firmware revision\n");
1511 case 7: // host name
1512 memset(tunnel
[t
].hostname
, 0, 128);
1513 memcpy(tunnel
[t
].hostname
, b
, (n
>= 127) ? 127 : n
);
1514 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Tunnel hostname = \"%s\"\n", tunnel
[t
].hostname
);
1515 // TBA - to send to RADIUS
1517 case 8: // vendor name
1518 memset(tunnel
[t
].vendor
, 0, sizeof(tunnel
[t
].vendor
));
1519 memcpy(tunnel
[t
].vendor
, b
, (n
>= sizeof(tunnel
[t
].vendor
) - 1) ? sizeof(tunnel
[t
].vendor
) - 1 : n
);
1520 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Vendor name = \"%s\"\n", tunnel
[t
].vendor
);
1522 case 9: // assigned tunnel
1523 tunnel
[t
].far
= ntohs(*(u16
*) (b
));
1524 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Remote tunnel id = %d\n", tunnel
[t
].far
);
1526 case 10: // rx window
1527 tunnel
[t
].window
= ntohs(*(u16
*) (b
));
1528 if (!tunnel
[t
].window
)
1529 tunnel
[t
].window
= 1; // window of 0 is silly
1530 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " rx window = %d\n", tunnel
[t
].window
);
1532 case 11: // Challenge
1534 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " LAC requested CHAP authentication for tunnel\n");
1535 build_chap_response(b
, 2, n
, &chapresponse
);
1538 case 14: // assigned session
1539 asession
= session
[s
].far
= ntohs(*(u16
*) (b
));
1540 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " assigned session = %d\n", asession
);
1542 case 15: // call serial number
1543 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " call serial number = %d\n", ntohl(*(u32
*)b
));
1545 case 18: // bearer type
1546 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " bearer type = %d\n", ntohl(*(u32
*)b
));
1549 case 19: // framing type
1550 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " framing type = %d\n", ntohl(*(u32
*)b
));
1553 case 21: // called number
1554 memset(called
, 0, MAXTEL
);
1555 memcpy(called
, b
, (n
>= MAXTEL
) ? (MAXTEL
-1) : n
);
1556 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Called <%s>\n", called
);
1558 case 22: // calling number
1559 memset(calling
, 0, MAXTEL
);
1560 memcpy(calling
, b
, (n
>= MAXTEL
) ? (MAXTEL
-1) : n
);
1561 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Calling <%s>\n", calling
);
1565 case 24: // tx connect speed
1568 session
[s
].tx_connect_speed
= ntohl(*(u32
*)b
);
1572 // AS5300s send connect speed as a string
1574 memcpy(tmp
, b
, (n
>= 30) ? 30 : n
);
1575 session
[s
].tx_connect_speed
= atol(tmp
);
1577 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " TX connect speed <%u>\n",
1578 session
[s
].tx_connect_speed
);
1580 case 38: // rx connect speed
1583 session
[s
].rx_connect_speed
= ntohl(*(u32
*)b
);
1587 // AS5300s send connect speed as a string
1589 memcpy(tmp
, b
, (n
>= 30) ? 30 : n
);
1590 session
[s
].rx_connect_speed
= atol(tmp
);
1592 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " RX connect speed <%u>\n",
1593 session
[s
].rx_connect_speed
);
1595 case 25: // Physical Channel ID
1597 u32 tmp
= ntohl(*(u32
*)b
);
1598 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Physical Channel ID <%X>\n", tmp
);
1601 case 29: // Proxy Authentication Type
1603 u16 authtype
= ntohs(*(u16
*)b
);
1604 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Proxy Auth Type %d (%s)\n",
1605 authtype
, authtypes
[authtype
]);
1606 requestchap
= (authtype
== 2);
1609 case 30: // Proxy Authentication Name
1611 char authname
[64] = {0};
1612 memcpy(authname
, b
, (n
> 63) ? 63 : n
);
1613 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Proxy Auth Name (%s)\n",
1617 case 31: // Proxy Authentication Challenge
1619 memcpy(radius
[session
[s
].radius
].auth
, b
, 16);
1620 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Proxy Auth Challenge\n");
1623 case 32: // Proxy Authentication ID
1625 u16 authid
= ntohs(*(u16
*)(b
));
1626 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Proxy Auth ID (%d)\n",
1628 if (session
[s
].radius
)
1629 radius
[session
[s
].radius
].id
= authid
;
1632 case 33: // Proxy Authentication Response
1634 char authresp
[64] = {0};
1635 memcpy(authresp
, b
, (n
> 63) ? 63 : n
);
1636 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Proxy Auth Response\n");
1639 case 27: // last send lcp
1640 { // find magic number
1641 u8
*p
= b
, *e
= p
+ n
;
1642 while (p
< e
&& p
[1])
1644 if (*p
== 5 && p
[1] == 6)
1645 amagic
= ntohl(*(u32
*) (p
+ 2));
1646 else if (*p
== 3 && p
[1] == 5 && *(u16
*) (p
+ 2) == htons(PPPCHAP
) && p
[4] == 5)
1649 aflags
|= SESSIONPFC
;
1651 aflags
|= SESSIONACFC
;
1656 char tmp
[500] = {0};
1658 memcpy((tmp
+ 1), b
, n
);
1662 case 28: // last recv lcp confreq
1664 char tmp
[500] = {0};
1666 memcpy((tmp
+ 1), b
, n
);
1669 case 26: // Initial Received LCP CONFREQ
1671 char tmp
[500] = {0};
1673 memcpy((tmp
+ 1), b
, n
);
1676 case 39: // seq required - we control it as an LNS anyway...
1678 case 36: // Random Vector
1679 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Random Vector received. Enabled AVP Hiding.\n");
1680 memset(session
[s
].random_vector
, 0, sizeof(session
[s
].random_vector
));
1681 memcpy(session
[s
].random_vector
, b
, n
);
1682 session
[s
].random_vector_length
= n
;
1685 log(2, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Unknown AVP type %d\n", mtype
);
1692 tunnelshutdown(t
, "Unknown Mandatory AVP");
1696 case 1: // SCCRQ - Start Control Connection Request
1698 controlt
*c
= controlnew(2); // sending SCCRP
1699 control16(c
, 2, version
, 1); // protocol version
1700 control32(c
, 3, 3, 1); // framing
1701 controls(c
, 7, tunnel
[t
].hostname
, 1); // host name (TBA)
1702 if (chapresponse
) controlb(c
, 13, chapresponse
, 16, 1); // Challenge response
1703 control16(c
, 9, t
, 1); // assigned tunnel
1704 controladd(c
, t
, s
); // send the resply
1706 tunnel
[t
].state
= TUNNELOPENING
;
1709 tunnel
[t
].state
= TUNNELOPEN
;
1712 tunnel
[t
].state
= TUNNELOPEN
;
1713 controlnull(t
); // ack
1716 controlnull(t
); // ack
1717 tunnelshutdown(t
, "Stopped"); // Shut down cleanly
1718 tunnelkill(t
, "Stopped"); // Immediately force everything dead
1721 controlnull(t
); // simply ACK
1735 STAT(session_overflow
);
1736 tunnelshutdown(t
, "No free sessions");
1744 sessionfree
= session
[s
].next
;
1745 memset(&session
[s
], 0, sizeof(session
[s
]));
1747 if (s
> config
->cluster_highest_sessionid
)
1748 config
->cluster_highest_sessionid
= s
;
1750 // make a RADIUS session
1751 if (!(r
= radiusnew(s
)))
1753 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "No free RADIUS sessions for ICRQ\n");
1754 sessionkill(s
, "no free RADIUS sesions");
1758 c
= controlnew(11); // sending ICRP
1759 session
[s
].id
= sessionid
++;
1760 session
[s
].opened
= time(NULL
);
1761 session
[s
].tunnel
= t
;
1762 session
[s
].far
= asession
;
1763 session
[s
].last_packet
= time_now
;
1764 log(3, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "New session (%d/%d)\n", tunnel
[t
].far
, session
[s
].far
);
1765 control16(c
, 14, s
, 1); // assigned session
1766 controladd(c
, t
, s
); // send the reply
1768 // Generate a random challenge
1770 for (n
= 0; n
< 15; n
++)
1771 radius
[r
].auth
[n
] = rand();
1773 strncpy(radius
[r
].calling
, calling
, sizeof(radius
[r
].calling
) - 1);
1774 strncpy(session
[s
].called
, called
, sizeof(session
[s
].called
) - 1);
1775 strncpy(session
[s
].calling
, calling
, sizeof(session
[s
].calling
) - 1);
1776 STAT(session_created
);
1783 if ( amagic
== 0) amagic
= time_now
;
1784 session
[s
].magic
= amagic
; // set magic number
1785 session
[s
].l2tp_flags
= aflags
; // set flags received
1786 log(3, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Magic %X Flags %X\n", amagic
, aflags
);
1787 controlnull(t
); // ack
1788 // In CHAP state, request PAP instead
1793 controlnull(t
); // ack
1794 sessionshutdown(s
, "Closed (Received CDN)");
1797 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Missing message type\n");
1800 STAT(tunnel_rx_errors
);
1801 if (mandatorymessage
& 0x80)
1802 tunnelshutdown(t
, "Unknown message");
1804 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Unknown message type %d\n", message
);
1807 if (chapresponse
) free(chapresponse
);
1808 cluster_send_tunnel(t
);
1812 log(4, 0, s
, t
, " Got a ZLB ack\n");
1819 log_hex(5, "Receive Tunnel Data", p
, l
);
1820 if (l
> 2 && p
[0] == 0xFF && p
[1] == 0x03)
1821 { // HDLC address header, discard
1827 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Short ppp length %d\n", l
);
1828 STAT(tunnel_rx_errors
);
1838 prot
= ntohs(*(u16
*) p
);
1843 if (s
&& !session
[s
].tunnel
) // Is something wrong??
1845 if (!config
->cluster_iam_master
)
1847 // Pass it off to the master to deal with..
1848 master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
);
1853 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "UDP packet contains session %d "
1854 "but no session[%d].tunnel exists (LAC said"
1855 " tunnel = %d). Dropping packet.\n", s
, s
, t
);
1856 STAT(tunnel_rx_errors
);
1862 log(3, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Session %d is closing. Don't process PPP packets\n", s
);
1863 // I'm pretty sure this isn't right -- mo.
1864 // return; // closing session, PPP not processed
1868 session
[s
].last_packet
= time_now
;
1869 if (!config
->cluster_iam_master
) { master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
); return; }
1870 processpap(t
, s
, p
, l
);
1872 else if (prot
== PPPCHAP
)
1874 session
[s
].last_packet
= time_now
;
1875 if (!config
->cluster_iam_master
) { master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
); return; }
1876 processchap(t
, s
, p
, l
);
1878 else if (prot
== PPPLCP
)
1880 session
[s
].last_packet
= time_now
;
1881 if (!config
->cluster_iam_master
) { master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
); return; }
1882 processlcp(t
, s
, p
, l
);
1884 else if (prot
== PPPIPCP
)
1886 session
[s
].last_packet
= time_now
;
1887 if (!config
->cluster_iam_master
) { master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
); return; }
1888 processipcp(t
, s
, p
, l
);
1890 else if (prot
== PPPCCP
)
1892 session
[s
].last_packet
= time_now
;
1893 if (!config
->cluster_iam_master
) { master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
); return; }
1894 processccp(t
, s
, p
, l
);
1896 else if (prot
== PPPIP
)
1898 if (!config
->cluster_iam_master
)
1900 // We're a slave. Should we forward this packet to the master?
1902 // Is this a walled garden session, or something that needs it's
1903 // idle time updated??
1905 // Maintain the idle timeouts on the master. If this would
1906 // significantly reset the idletimeout, run it via the master
1907 // to refresh the master's idle timer.
1908 // Not sure this is ideal: It may re-order packets.
1910 if (session
[s
].walled_garden
|| (session
[s
].last_packet
+ (ECHO_TIMEOUT
/2)) < time_now
)
1912 master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
);
1913 session
[s
].last_packet
= time_now
;
1916 // fall through to processipin.
1918 session
[s
].last_packet
= time_now
;
1919 processipin(t
, s
, p
, l
);
1923 STAT(tunnel_rx_errors
);
1924 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Unknown PPP protocol %04X\n", prot
);
1929 // read and process packet on tun
1930 void processtun(u8
* buf
, int len
)
1932 log_hex(5, "Receive TUN Data", buf
, len
);
1933 STAT(tun_rx_packets
);
1934 INC_STAT(tun_rx_bytes
, len
);
1936 CSTAT(call_processtun
);
1942 log(1, 0, 0, 0, "Short tun packet %d bytes\n", len
);
1943 STAT(tun_rx_errors
);
1947 if (*(u16
*) (buf
+ 2) == htons(PKTIP
)) // IP
1948 processipout(buf
, len
);
1953 // Maximum number of actions to complete.
1954 // This is to avoid sending out too many packets
1956 #define MAX_ACTIONS 500
1958 int regular_cleanups(void)
1960 static sessionidt s
= 0; // Next session to check for actions on.
1964 static clockt next_acct
= 0;
1967 log(3, 0, 0, 0, "Begin regular cleanup\n");
1969 for (r
= 1; r
< MAXRADIUS
; r
++)
1971 if (!radius
[r
].state
)
1973 if (radius
[r
].retry
)
1975 if (radius
[r
].retry
<= TIME
)
1978 radius
[r
].retry
= backoff(radius
[r
].try+1); // Is this really needed? --mo
1980 for (t
= 1; t
<= config
->cluster_highest_tunnelid
; t
++)
1982 // check for expired tunnels
1983 if (tunnel
[t
].die
&& tunnel
[t
].die
<= TIME
)
1985 STAT(tunnel_timeout
);
1986 tunnelkill(t
, "Expired");
1989 // check for message resend
1990 if (tunnel
[t
].retry
&& tunnel
[t
].controlc
)
1992 // resend pending messages as timeout on reply
1993 if (tunnel
[t
].retry
<= TIME
)
1995 controlt
*c
= tunnel
[t
].controls
;
1996 u8 w
= tunnel
[t
].window
;
1997 tunnel
[t
].try++; // another try
1998 if (tunnel
[t
].try > 5)
1999 tunnelkill(t
, "Timeout on control message"); // game over
2003 tunnelsend(c
->buf
, c
->length
, t
);
2009 if (tunnel
[t
].state
== TUNNELOPEN
&& tunnel
[t
].lastrec
< TIME
+ 600)
2011 controlt
*c
= controlnew(6); // sending HELLO
2012 controladd(c
, t
, 0); // send the message
2013 log(3, tunnel
[t
].ip
, 0, t
, "Sending HELLO message\n");
2016 // Check for tunnel changes requested from the CLI
2017 if ((a
= cli_tunnel_actions
[t
].action
))
2019 cli_tunnel_actions
[t
].action
= 0;
2020 if (a
& CLI_TUN_KILL
)
2022 log(2, tunnel
[t
].ip
, 0, t
, "Dropping tunnel by CLI\n");
2023 tunnelshutdown(t
, "Requested by administrator");
2030 for (i
= 1; i
<= config
->cluster_highest_sessionid
; i
++)
2033 if (s
> config
->cluster_highest_sessionid
)
2036 if (!session
[s
].tunnel
) // Session isn't in use
2039 if (!session
[s
].die
&& session
[s
].ip
&& !(session
[s
].flags
& SF_IPCP_ACKED
))
2041 // IPCP has not completed yet. Resend
2042 log(3, session
[s
].ip
, s
, session
[s
].tunnel
, "No ACK for initial IPCP ConfigReq... resending\n");
2043 sendipcp(session
[s
].tunnel
, s
);
2046 // check for expired sessions
2047 if (session
[s
].die
&& session
[s
].die
<= TIME
)
2049 sessionkill(s
, "Expired");
2050 if (++count
>= MAX_ACTIONS
) break;
2054 // Drop sessions who have not responded within IDLE_TIMEOUT seconds
2055 if (session
[s
].last_packet
&& (time_now
- session
[s
].last_packet
>= IDLE_TIMEOUT
))
2057 sessionkill(s
, "No response to LCP ECHO requests");
2058 STAT(session_timeout
);
2059 if (++count
>= MAX_ACTIONS
) break;
2063 // No data in IDLE_TIMEOUT seconds, send LCP ECHO
2064 if (session
[s
].user
[0] && (time_now
- session
[s
].last_packet
>= ECHO_TIMEOUT
))
2066 u8 b
[MAXCONTROL
] = {0};
2068 u8
*q
= makeppp(b
, sizeof(b
), 0, 0, session
[s
].tunnel
, s
, PPPLCP
);
2070 log(3, session
[s
].ip
, s
, t
, "failed to send ECHO packet.\n");
2075 *(u8
*)(q
+ 1) = (time_now
% 255); // ID
2076 *(u16
*)(q
+ 2) = htons(8); // Length
2077 *(u32
*)(q
+ 4) = 0; // Magic Number (not supported)
2079 log(4, session
[s
].ip
, s
, session
[s
].tunnel
, "No data in %d seconds, sending LCP ECHO\n",
2080 (int)(time_now
- session
[s
].last_packet
));
2081 tunnelsend(b
, 24, session
[s
].tunnel
); // send it
2082 if (++count
>= MAX_ACTIONS
) break;
2085 // Check for actions requested from the CLI
2086 if ((a
= cli_session_actions
[s
].action
))
2090 cli_session_actions
[s
].action
= 0;
2091 if (a
& CLI_SESS_KILL
)
2093 log(2, 0, s
, session
[s
].tunnel
, "Dropping session by CLI\n");
2094 sessionshutdown(s
, "Requested by administrator");
2095 a
= 0; // dead, no need to check for other actions
2098 if (a
& CLI_SESS_SNOOP
)
2100 log(2, 0, s
, session
[s
].tunnel
, "Snooping session by CLI (to %s:%d)\n",
2101 inet_toa(cli_session_actions
[s
].snoop_ip
), cli_session_actions
[s
].snoop_port
);
2103 session
[s
].snoop_ip
= cli_session_actions
[s
].snoop_ip
;
2104 session
[s
].snoop_port
= cli_session_actions
[s
].snoop_port
;
2108 if (a
& CLI_SESS_NOSNOOP
)
2110 log(2, 0, s
, session
[s
].tunnel
, "Unsnooping session by CLI\n");
2111 session
[s
].snoop_ip
= 0;
2112 session
[s
].snoop_port
= 0;
2116 if (a
& CLI_SESS_THROTTLE
)
2118 log(2, 0, s
, session
[s
].tunnel
, "Throttling session by CLI (to %d)\n",
2119 cli_session_actions
[s
].throttle
);
2121 throttle_session(s
, cli_session_actions
[s
].throttle
);
2124 if (a
& CLI_SESS_NOTHROTTLE
)
2126 log(2, 0, s
, session
[s
].tunnel
, "Un-throttling session by CLI\n");
2127 throttle_session(s
, 0);
2131 cluster_send_session(s
);
2133 if (++count
>= MAX_ACTIONS
) break;
2137 if (config
->accounting_dir
&& next_acct
<= TIME
)
2139 // Dump accounting data
2140 next_acct
= TIME
+ ACCT_TIME
;
2144 if (count
>= MAX_ACTIONS
)
2145 return 1; // Didn't finish!
2147 log(3, 0, 0, 0, "End regular cleanup (%d actions), next in %d seconds\n", count
, config
->cleanup_interval
);
2153 // Are we in the middle of a tunnel update, or radius
2156 int still_busy(void)
2159 static int last_talked
= 0;
2160 for (i
= config
->cluster_highest_tunnelid
; i
> 0 ; --i
) {
2161 if (!tunnel
[i
].controlc
)
2164 if (last_talked
!= TIME
) {
2165 log(2,0,0,0, "Tunnel %d still has un-acked control messages.\n", i
);
2171 for (i
= 1; i
< MAXRADIUS
; i
++)
2173 if (radius
[i
].state
== RADIUSNULL
)
2175 if (radius
[i
].state
== RADIUSWAIT
)
2178 if (last_talked
!= TIME
) {
2179 log(2,0,0,0, "Radius session %d is still busy (sid %d)\n", i
, radius
[i
].session
);
2188 // main loop - gets packets on tun or udp and processes them
2195 clockt next_cluster_ping
= 0; // send initial ping immediately
2196 time_t next_clean
= time_now
+ config
->cleanup_interval
;
2198 log(4, 0, 0, 0, "Beginning of main loop. udpfd=%d, tunfd=%d, cluster_sockfd=%d, controlfd=%d\n",
2199 udpfd
, tunfd
, cluster_sockfd
, controlfd
);
2204 FD_SET(controlfd
, &cr
);
2206 if (cluster_sockfd
) FD_SET(cluster_sockfd
, &cr
);
2208 if (cn
< tunfd
) cn
= tunfd
;
2209 if (cn
< controlfd
) cn
= controlfd
;
2210 if (cn
< clifd
) cn
= clifd
;
2211 if (cn
< cluster_sockfd
) cn
= cluster_sockfd
;
2212 for (i
= 0; i
< config
->num_radfds
; i
++)
2214 if (!radfds
[i
]) continue;
2215 FD_SET(radfds
[i
], &cr
);
2220 while (!main_quit
|| still_busy())
2226 int bgp_set
[BGP_NUM_PEERS
];
2229 if (config
->reload_config
)
2231 // Update the config state based on config settings
2235 memcpy(&r
, &cr
, sizeof(fd_set
));
2237 to
.tv_usec
= 100000; // 1/10th of a second.
2241 for (i
= 0; i
< BGP_NUM_PEERS
; i
++)
2243 bgp_set
[i
] = bgp_select_state(&bgp_peers
[i
]);
2246 FD_SET(bgp_peers
[i
].sock
, &r
);
2247 if (bgp_peers
[i
].sock
> n
)
2248 n
= bgp_peers
[i
].sock
;
2253 FD_SET(bgp_peers
[i
].sock
, &w
);
2254 if (bgp_peers
[i
].sock
> n
)
2255 n
= bgp_peers
[i
].sock
;
2259 n
= select(n
+ 1, &r
, &w
, 0, &to
);
2261 n
= select(n
+ 1, &r
, 0, 0, &to
);
2270 log(0, 0, 0, 0, "Error returned from select(): %s\n", strerror(errno
));
2276 struct sockaddr_in addr
;
2277 int alen
= sizeof(addr
);
2278 if (FD_ISSET(udpfd
, &r
))
2281 for (c
= 0; c
< config
->multi_read_count
; c
++)
2283 if ((n
= recvfrom(udpfd
, buf
, sizeof(buf
), 0, (void *) &addr
, &alen
)) > 0)
2284 processudp(buf
, n
, &addr
);
2289 if (FD_ISSET(tunfd
, &r
))
2292 for (c
= 0; c
< config
->multi_read_count
; c
++)
2294 if ((n
= read(tunfd
, buf
, sizeof(buf
))) > 0)
2300 for (i
= 0; i
< config
->num_radfds
; i
++)
2301 if (FD_ISSET(radfds
[i
], &r
))
2302 processrad(buf
, recv(radfds
[i
], buf
, sizeof(buf
), 0), i
);
2303 if (FD_ISSET(cluster_sockfd
, &r
)) {
2305 size
= recvfrom(cluster_sockfd
, buf
, sizeof(buf
), MSG_WAITALL
, (void *) &addr
, &alen
);
2306 processcluster(buf
, size
, addr
.sin_addr
.s_addr
);
2308 if (FD_ISSET(controlfd
, &r
))
2309 processcontrol(buf
, recvfrom(controlfd
, buf
, sizeof(buf
), MSG_WAITALL
, (void *) &addr
, &alen
), &addr
);
2310 if (FD_ISSET(clifd
, &r
))
2312 struct sockaddr_in addr
;
2314 int len
= sizeof(addr
);
2316 if ((sockfd
= accept(clifd
, (struct sockaddr
*)&addr
, &len
)) <= 0)
2318 log(0, 0, 0, 0, "accept error: %s\n", strerror(errno
));
2329 // Runs on every machine (master and slaves).
2330 if (cluster_sockfd
&& next_cluster_ping
<= TIME
)
2332 // Check to see which of the cluster is still alive..
2334 cluster_send_ping(basetime
); // Only does anything if we're a slave
2335 cluster_check_master(); // ditto.
2337 cluster_heartbeat(); // Only does anything if we're a master.
2338 cluster_check_slaves(); // ditto.
2340 master_update_counts(); // If we're a slave, send our byte counters to our master.
2342 if (config
->cluster_iam_master
&& !config
->cluster_iam_uptodate
)
2343 next_cluster_ping
= TIME
+ 1; // out-of-date slaves, do fast updates
2345 next_cluster_ping
= TIME
+ config
->cluster_hb_interval
;
2348 // Run token bucket filtering queue..
2349 // Only run it every 1/10th of a second.
2350 // Runs on all machines both master and slave.
2352 static clockt last_run
= 0;
2353 if (last_run
!= TIME
) {
2359 /* Handle timeouts. Make sure that this gets run anyway, even if there was
2360 * something to read, else under load this will never actually run....
2363 if (config
->cluster_iam_master
&& next_clean
<= time_now
) {
2364 if (regular_cleanups()) { // Did it finish?
2365 next_clean
= time_now
+ 1 ; // Didn't finish. Check quickly.
2367 next_clean
= time_now
+ config
->cleanup_interval
; // Did. Move to next interval.
2372 for (i
= 0; i
< BGP_NUM_PEERS
; i
++)
2374 bgp_process(&bgp_peers
[i
],
2375 bgp_set
[i
] ? FD_ISSET(bgp_peers
[i
].sock
, &r
) : 0,
2376 bgp_set
[i
] ? FD_ISSET(bgp_peers
[i
].sock
, &w
) : 0);
2381 // Are we the master and shutting down??
2382 if (config
->cluster_iam_master
)
2383 cluster_heartbeat(); // Flush any queued changes..
2385 // Ok. Notify everyone we're shutting down. If we're
2386 // the master, this will force an election.
2387 cluster_send_ping(0);
2390 // Important!!! We MUST not process any packets past this point!
2393 // Init data structures
2398 _statistics
= mmap(NULL
, sizeof(struct Tstats
), PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2399 if (_statistics
== MAP_FAILED
)
2401 log(0, 0, 0, 0, "Error doing mmap for _statistics: %s\n", strerror(errno
));
2404 config
= mmap(NULL
, sizeof(struct configt
), PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2405 if (config
== MAP_FAILED
)
2407 log(0, 0, 0, 0, "Error doing mmap for configuration: %s\n", strerror(errno
));
2410 memset(config
, 0, sizeof(struct configt
));
2411 time(&config
->start_time
);
2412 strncpy(config
->config_file
, CONFIGFILE
, sizeof(config
->config_file
) - 1);
2413 tunnel
= mmap(NULL
, sizeof(tunnelt
) * MAXTUNNEL
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2414 if (tunnel
== MAP_FAILED
)
2416 log(0, 0, 0, 0, "Error doing mmap for tunnels: %s\n", strerror(errno
));
2419 session
= mmap(NULL
, sizeof(sessiont
) * MAXSESSION
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2420 if (session
== MAP_FAILED
)
2422 log(0, 0, 0, 0, "Error doing mmap for sessions: %s\n", strerror(errno
));
2426 sess_count
= mmap(NULL
, sizeof(sessioncountt
) * MAXSESSION
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2427 if (sess_count
== MAP_FAILED
)
2429 log(0, 0, 0, 0, "Error doing mmap for sessions_count: %s\n", strerror(errno
));
2433 radius
= mmap(NULL
, sizeof(radiust
) * MAXRADIUS
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2434 if (radius
== MAP_FAILED
)
2436 log(0, 0, 0, 0, "Error doing mmap for radius: %s\n", strerror(errno
));
2439 ip_address_pool
= mmap(NULL
, sizeof(ippoolt
) * MAXIPPOOL
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2440 if (ip_address_pool
== MAP_FAILED
)
2442 log(0, 0, 0, 0, "Error doing mmap for ip_address_pool: %s\n", strerror(errno
));
2446 ringbuffer
= mmap(NULL
, sizeof(struct Tringbuffer
), PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2447 if (ringbuffer
== MAP_FAILED
)
2449 log(0, 0, 0, 0, "Error doing mmap for ringbuffer: %s\n", strerror(errno
));
2452 memset(ringbuffer
, 0, sizeof(struct Tringbuffer
));
2455 cli_session_actions
= mmap(NULL
, sizeof(struct cli_session_actions
) * MAXSESSION
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2456 if (cli_session_actions
== MAP_FAILED
)
2458 log(0, 0, 0, 0, "Error doing mmap for cli session actions: %s\n", strerror(errno
));
2461 memset(cli_session_actions
, 0, sizeof(struct cli_session_actions
) * MAXSESSION
);
2462 cli_tunnel_actions
= mmap(NULL
, sizeof(struct cli_tunnel_actions
) * MAXSESSION
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2463 if (cli_tunnel_actions
== MAP_FAILED
)
2465 log(0, 0, 0, 0, "Error doing mmap for cli tunnel actions: %s\n", strerror(errno
));
2468 memset(cli_tunnel_actions
, 0, sizeof(struct cli_tunnel_actions
) * MAXSESSION
);
2470 memset(tunnel
, 0, sizeof(tunnelt
) * MAXTUNNEL
);
2471 memset(session
, 0, sizeof(sessiont
) * MAXSESSION
);
2472 memset(radius
, 0, sizeof(radiust
) * MAXRADIUS
);
2473 memset(ip_address_pool
, 0, sizeof(ippoolt
) * MAXIPPOOL
);
2475 // Put all the sessions on the free list marked as undefined.
2476 for (i
= 1; i
< MAXSESSION
- 1; i
++) {
2477 session
[i
].next
= i
+ 1;
2478 session
[i
].tunnel
= T_UNDEF
; // mark it as not filled in.
2480 session
[MAXSESSION
- 1].next
= 0;
2483 // Mark all the tunnels as undefined (waiting to be filled in by a download).
2484 for (i
= 1; i
< MAXTUNNEL
- 1; i
++) {
2485 tunnel
[i
].state
= TUNNELUNDEF
; // mark it as not filled in.
2491 // Grab my hostname unless it's been specified
2492 gethostname(hostname
, sizeof(hostname
));
2493 if ((p
= strchr(hostname
, '.'))) *p
= 0;
2495 _statistics
->start_time
= _statistics
->last_reset
= time(NULL
);
2498 bgp_peers
= mmap(NULL
, sizeof(struct bgp_peer
) * BGP_NUM_PEERS
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2499 if (bgp_peers
== MAP_FAILED
)
2501 log(0, 0, 0, 0, "Error doing mmap for bgp: %s\n", strerror(errno
));
2507 void initiptables(void)
2509 /* Flush the tables here so that we have a clean slate */
2511 // Not needed. 'nat' is setup by garden.c
2512 // mangle isn't used (as throttling is done by tbf inhouse).
2515 int assign_ip_address(sessionidt s
)
2519 time_t best_time
= time_now
;
2520 char *u
= session
[s
].user
;
2524 CSTAT(call_assign_ip_address
);
2526 for (i
= 1; i
< ip_pool_size
; i
++)
2528 if (!ip_address_pool
[i
].address
|| ip_address_pool
[i
].assigned
)
2531 if (!session
[s
].walled_garden
&& ip_address_pool
[i
].user
[0] && !strcmp(u
, ip_address_pool
[i
].user
))
2538 if (ip_address_pool
[i
].last
< best_time
)
2541 if (!(best_time
= ip_address_pool
[i
].last
))
2542 break; // never used, grab this one
2548 log(0, 0, s
, session
[s
].tunnel
, "assign_ip_address(): out of addresses\n");
2552 session
[s
].ip
= ip_address_pool
[best
].address
;
2553 session
[s
].ip_pool_index
= best
;
2554 ip_address_pool
[best
].assigned
= 1;
2555 ip_address_pool
[best
].last
= time_now
;
2556 ip_address_pool
[best
].session
= s
;
2557 if (session
[s
].walled_garden
)
2558 /* Don't track addresses of users in walled garden (note: this
2559 means that their address isn't "sticky" even if they get
2561 ip_address_pool
[best
].user
[0] = 0;
2563 strncpy(ip_address_pool
[best
].user
, u
, sizeof(ip_address_pool
[best
].user
) - 1);
2566 log(4, ip_address_pool
[best
].address
, s
, session
[s
].tunnel
,
2567 "assign_ip_address(): %s ip address %d from pool\n", reuse
? "Reusing" : "Allocating", best
);
2572 void free_ip_address(sessionidt s
)
2574 int i
= session
[s
].ip_pool_index
;
2577 return; // what the?
2579 if (i
< 0) // Is this actually part of the ip pool?
2583 cache_ipmap(session
[s
].ip
, -i
); // Change the mapping to point back to the ip pool index.
2585 ip_address_pool
[i
].assigned
= 0;
2586 ip_address_pool
[i
].session
= 0;
2587 ip_address_pool
[i
].last
= time_now
;
2590 CSTAT(call_free_ip_address
);
2595 // Fsck the address pool against the session table.
2596 // Normally only called when we become a master.
2598 // This isn't perfect: We aren't keep tracking of which
2599 // users used to have an IP address.
2601 void rebuild_address_pool(void)
2606 // Zero the IP pool allocation, and build
2607 // a map from IP address to pool index.
2608 for (i
= 1; i
< MAXIPPOOL
; ++i
) {
2609 ip_address_pool
[i
].assigned
= 0;
2610 ip_address_pool
[i
].session
= 0;
2611 if (!ip_address_pool
[i
].address
)
2614 cache_ipmap(ip_address_pool
[i
].address
, -i
); // Map pool IP to pool index.
2617 for (i
= 0; i
< MAXSESSION
; ++i
) {
2619 if (!session
[i
].ip
|| !session
[i
].tunnel
)
2621 ipid
= - lookup_ipmap(htonl(session
[i
].ip
));
2623 if (session
[i
].ip_pool_index
< 0) { // Not allocated out of the pool.
2624 if (ipid
< 1) // Not found in the pool either? good.
2627 log(0, 0, i
, 0, "Session %d has an IP address (%s) that was marked static, but is in the pool (%d)!\n",
2628 i
, inet_toa(session
[i
].ip
), ipid
);
2630 // Fall through and process it as part of the pool.
2634 if (ipid
> MAXIPPOOL
|| ipid
< 0) {
2635 log(0, 0, i
, 0, "Session %d has a pool IP that's not found in the pool! (%d)\n", i
, ipid
);
2637 session
[i
].ip_pool_index
= ipid
;
2641 ip_address_pool
[ipid
].assigned
= 1;
2642 ip_address_pool
[ipid
].session
= i
;
2643 ip_address_pool
[ipid
].last
= time_now
;
2644 strncpy(ip_address_pool
[ipid
].user
, session
[i
].user
, sizeof(ip_address_pool
[ipid
].user
) - 1);
2645 session
[i
].ip_pool_index
= ipid
;
2646 cache_ipmap(session
[i
].ip
, i
); // Fix the ip map.
2651 // Fix the address pool to match a changed session.
2652 // (usually when the master sends us an update).
2653 void fix_address_pool(int sid
)
2657 ipid
= session
[sid
].ip_pool_index
;
2659 if (ipid
> ip_pool_size
)
2660 return; // Ignore it. rebuild_address_pool will fix it up.
2662 if (ip_address_pool
[ipid
].address
!= session
[sid
].ip
)
2663 return; // Just ignore it. rebuild_address_pool will take care of it.
2665 ip_address_pool
[ipid
].assigned
= 1;
2666 ip_address_pool
[ipid
].session
= sid
;
2667 ip_address_pool
[ipid
].last
= time_now
;
2668 strncpy(ip_address_pool
[ipid
].user
, session
[sid
].user
, sizeof(ip_address_pool
[ipid
].user
) - 1);
2672 // Add a block of addresses to the IP pool to hand out.
2674 void add_to_ip_pool(u32 addr
, u32 mask
)
2678 mask
= 0xffffffff; // Host route only.
2682 if (ip_pool_size
>= MAXIPPOOL
) // Pool is full!
2685 for (i
= addr
;(i
& mask
) == addr
; ++i
)
2687 if ((i
& 0xff) == 0 || (i
&0xff) == 255)
2688 continue; // Skip 0 and broadcast addresses.
2690 ip_address_pool
[ip_pool_size
].address
= i
;
2691 ip_address_pool
[ip_pool_size
].assigned
= 0;
2693 if (ip_pool_size
>= MAXIPPOOL
)
2695 log(0,0,0,0, "Overflowed IP pool adding %s\n", inet_toa(htonl(addr
)) );
2701 // Initialize the IP address pool
2707 memset(ip_address_pool
, 0, sizeof(ip_address_pool
));
2709 if (!(f
= fopen(IPPOOLFILE
, "r")))
2711 log(0, 0, 0, 0, "Can't load pool file " IPPOOLFILE
": %s\n", strerror(errno
));
2715 while (ip_pool_size
< MAXIPPOOL
&& fgets(buf
, 4096, f
))
2718 buf
[4095] = 0; // Force it to be zero terminated/
2720 if (*buf
== '#' || *buf
== '\n')
2721 continue; // Skip comments / blank lines
2722 if ((p
= (char *)strrchr(buf
, '\n'))) *p
= 0;
2723 if ((p
= (char *)strchr(buf
, ':')))
2727 src
= inet_addr(buf
);
2728 if (src
== INADDR_NONE
)
2730 log(0, 0, 0, 0, "Invalid address pool IP %s\n", buf
);
2733 // This entry is for a specific IP only
2734 if (src
!= config
->bind_address
)
2739 if ((p
= (char *)strchr(pool
, '/')))
2743 u32 start
= 0, mask
= 0;
2745 log(2, 0, 0, 0, "Adding IP address range %s\n", buf
);
2747 if (!*p
|| !(numbits
= atoi(p
)))
2749 log(0, 0, 0, 0, "Invalid pool range %s\n", buf
);
2752 start
= ntohl(inet_addr(pool
));
2753 mask
= (u32
)(pow(2, numbits
) - 1) << (32 - numbits
);
2755 // Add a static route for this pool
2756 log(5, 0, 0, 0, "Adding route for address pool %s/%u\n", inet_toa(htonl(start
)), 32 + mask
);
2757 routeset(0, start
, mask
, 0, 1);
2759 add_to_ip_pool(start
, mask
);
2763 // It's a single ip address
2764 add_to_ip_pool(inet_addr(pool
), 0);
2768 log(1, 0, 0, 0, "IP address pool is %d addresses\n", ip_pool_size
- 1);
2771 void snoop_send_packet(char *packet
, u16 size
, ipt destination
, u16 port
)
2773 struct sockaddr_in snoop_addr
= {0};
2774 if (!destination
|| !port
|| snoopfd
<= 0 || size
<= 0 || !packet
)
2777 snoop_addr
.sin_family
= AF_INET
;
2778 snoop_addr
.sin_addr
.s_addr
= destination
;
2779 snoop_addr
.sin_port
= ntohs(port
);
2781 log(5, 0, 0, 0, "Snooping packet at %p (%d bytes) to %s:%d\n",
2782 packet
, size
, inet_toa(snoop_addr
.sin_addr
.s_addr
), htons(snoop_addr
.sin_port
));
2783 if (sendto(snoopfd
, packet
, size
, MSG_DONTWAIT
| MSG_NOSIGNAL
, (void *) &snoop_addr
, sizeof(snoop_addr
)) < 0)
2784 log(0, 0, 0, 0, "Error sending intercept packet: %s\n", strerror(errno
));
2785 STAT(packets_snooped
);
2788 void dump_acct_info()
2791 char filename
[1024];
2793 time_t t
= time(NULL
);
2798 CSTAT(call_dump_acct_info
);
2800 strftime(timestr
, 64, "%Y%m%d%H%M%S", localtime(&t
));
2801 snprintf(filename
, 1024, "%s/%s", config
->accounting_dir
, timestr
);
2803 for (i
= 0; i
< MAXSESSION
; i
++)
2805 if (!session
[i
].opened
|| !session
[i
].ip
|| !session
[i
].cin
|| !session
[i
].cout
|| !*session
[i
].user
|| session
[i
].walled_garden
)
2809 time_t now
= time(NULL
);
2810 if (!(f
= fopen(filename
, "w")))
2812 log(0, 0, 0, 0, "Can't write accounting info to %s: %s\n", filename
, strerror(errno
));
2815 log(3, 0, 0, 0, "Dumping accounting information to %s\n", filename
);
2816 fprintf(f
, "# dslwatch.pl dump file V1.01\n"
2820 "# format: username ip qos uptxoctets downrxoctets\n",
2826 log(4, 0, 0, 0, "Dumping accounting information for %s\n", session
[i
].user
);
2827 fprintf(f
, "%s %s %d %u %u\n",
2828 session
[i
].user
, // username
2829 inet_toa(htonl(session
[i
].ip
)), // ip
2830 (session
[i
].throttle
) ? 2 : 1, // qos
2831 (u32
)session
[i
].cin
, // uptxoctets
2832 (u32
)session
[i
].cout
); // downrxoctets
2834 session
[i
].pin
= session
[i
].cin
= 0;
2835 session
[i
].pout
= session
[i
].cout
= 0;
2843 int main(int argc
, char *argv
[])
2848 _program_name
= strdup(argv
[0]);
2850 time(&basetime
); // start clock
2853 while ((o
= getopt(argc
, argv
, "vc:h:a:")) >= 0)
2858 // Double fork to detach from terminal
2859 if (fork()) exit(0);
2860 if (fork()) exit(0);
2866 snprintf(hostname
, sizeof(hostname
), "%s", optarg
);
2870 printf("Args are:\n"
2871 "\t-d\tDetach from terminal\n"
2872 "\t-c <file>\tConfig file\n"
2873 "\t-h <hostname>\tForce hostname\n"
2874 "\t-a <address>\tUse specific address\n"
2882 // Start the timer routine off
2884 strftime(time_now_string
, sizeof(time_now_string
), "%Y-%m-%d %H:%M:%S", localtime(&time_now
));
2885 signal(SIGALRM
, sigalrm_handler
);
2886 siginterrupt(SIGALRM
, 0);
2892 config
->debug
= optdebug
;
2898 log(0, 0, 0, 0, "L2TPNS version " VERSION
"\n");
2899 log(0, 0, 0, 0, "Copyright (c) 2003, 2004 Optus Internet Engineering\n");
2900 log(0, 0, 0, 0, "Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced\n");
2903 rlim
.rlim_cur
= RLIM_INFINITY
;
2904 rlim
.rlim_max
= RLIM_INFINITY
;
2905 // Remove the maximum core size
2906 if (setrlimit(RLIMIT_CORE
, &rlim
) < 0)
2907 log(0, 0, 0, 0, "Can't set ulimit: %s\n", strerror(errno
));
2908 // Make core dumps go to /tmp
2912 if (config
->scheduler_fifo
)
2915 struct sched_param params
= {0};
2916 params
.sched_priority
= 1;
2918 if (get_nprocs() < 2)
2920 log(0, 0, 0, 0, "Not using FIFO scheduler, there is only 1 processor in the system.\n");
2921 config
->scheduler_fifo
= 0;
2925 if ((ret
= sched_setscheduler(0, SCHED_FIFO
, ¶ms
)) == 0)
2927 log(1, 0, 0, 0, "Using FIFO scheduler. Say goodbye to any other processes running\n");
2931 log(0, 0, 0, 0, "Error setting scheduler to FIFO: %s\n", strerror(errno
));
2932 config
->scheduler_fifo
= 0;
2937 /* Set up the cluster communications port. */
2938 if (cluster_init(config
->bind_address
) < 0)
2942 signal(SIGPIPE
, SIG_IGN
);
2943 bgp_setup(config
->as_number
);
2944 bgp_add_route(config
->bind_address
, 0xffffffff);
2945 if (*config
->bgp_peer
[0])
2946 bgp_start(&bgp_peers
[0], config
->bgp_peer
[0],
2947 config
->bgp_peer_as
[0], 0); /* 0 = routing disabled */
2949 if (*config
->bgp_peer
[1])
2950 bgp_start(&bgp_peers
[1], config
->bgp_peer
[1],
2951 config
->bgp_peer_as
[1], 0);
2955 log(1, 0, 0, 0, "Set up on interface %s\n", config
->tundevice
);
2963 signal(SIGHUP
, sighup_handler
);
2964 signal(SIGTERM
, sigterm_handler
);
2965 signal(SIGINT
, sigterm_handler
);
2966 signal(SIGQUIT
, sigquit_handler
);
2967 signal(SIGCHLD
, sigchild_handler
);
2969 // Prevent us from getting paged out
2970 if (config
->lock_pages
)
2972 if (!mlockall(MCL_CURRENT
))
2973 log(1, 0, 0, 0, "Locking pages into memory\n");
2975 log(0, 0, 0, 0, "Can't lock pages: %s\n", strerror(errno
));
2980 // Drop privileges here
2981 if (config
->target_uid
> 0 && geteuid() == 0)
2982 setuid(config
->target_uid
);
2987 /* try to shut BGP down cleanly; with luck the sockets will be
2988 writable since we're out of the select */
2991 for (i
= 0; i
< BGP_NUM_PEERS
; i
++)
2992 if (bgp_peers
[i
].state
== Established
)
2993 bgp_stop(&bgp_peers
[i
]);
2997 /* remove plugins (so cleanup code gets run) */
3000 // Remove the PID file if we wrote it
3001 if (config
->wrote_pid
&& *config
->pid_file
== '/')
3002 unlink(config
->pid_file
);
3004 /* kill CLI children */
3005 signal(SIGTERM
, SIG_IGN
);
3010 void sighup_handler(int junk
)
3012 if (log_stream
&& log_stream
!= stderr
)
3021 void sigalrm_handler(int junk
)
3023 // Log current traffic stats
3025 snprintf(config
->bandwidth
, sizeof(config
->bandwidth
),
3026 "UDP-ETH:%1.0f/%1.0f ETH-UDP:%1.0f/%1.0f TOTAL:%0.1f IN:%u OUT:%u",
3027 (udp_rx
/ 1024.0 / 1024.0 * 8),
3028 (eth_tx
/ 1024.0 / 1024.0 * 8),
3029 (eth_rx
/ 1024.0 / 1024.0 * 8),
3030 (udp_tx
/ 1024.0 / 1024.0 * 8),
3031 ((udp_tx
+ udp_rx
+ eth_tx
+ eth_rx
) / 1024.0 / 1024.0 * 8),
3032 udp_rx_pkt
, eth_rx_pkt
);
3034 udp_tx
= udp_rx
= 0;
3035 udp_rx_pkt
= eth_rx_pkt
= 0;
3036 eth_tx
= eth_rx
= 0;
3038 if (config
->dump_speed
)
3039 printf("%s\n", config
->bandwidth
);
3041 // Update the internal time counter
3043 strftime(time_now_string
, sizeof(time_now_string
), "%Y-%m-%d %H:%M:%S", localtime(&time_now
));
3048 struct param_timer p
= { time_now
};
3049 run_plugins(PLUGIN_TIMER
, &p
);
3054 void sigterm_handler(int junk
)
3056 log(1, 0, 0, 0, "Shutting down cleanly\n");
3057 if (config
->save_state
)
3063 void sigquit_handler(int junk
)
3067 log(1, 0, 0, 0, "Shutting down without saving sessions\n");
3068 for (i
= 1; i
< MAXSESSION
; i
++)
3070 if (session
[i
].opened
)
3071 sessionkill(i
, "L2TPNS Closing");
3073 for (i
= 1; i
< MAXTUNNEL
; i
++)
3075 if (tunnel
[i
].ip
|| tunnel
[i
].state
)
3076 tunnelshutdown(i
, "L2TPNS Closing");
3082 void sigchild_handler(int signal
)
3084 while (waitpid(-1, NULL
, WNOHANG
) > 0)
3094 char magic
[sizeof(DUMP_MAGIC
) - 1];
3097 if (!config
->save_state
)
3103 if (stat(STATEFILE
, &sb
) < 0)
3109 if (sb
.st_mtime
< (time(NULL
) - 60))
3111 log(0, 0, 0, 0, "State file is too old to read, ignoring\n");
3116 f
= fopen(STATEFILE
, "r");
3121 log(0, 0, 0, 0, "Can't read state file: %s\n", strerror(errno
));
3125 if (fread(magic
, sizeof(magic
), 1, f
) != 1 || strncmp(magic
, DUMP_MAGIC
, sizeof(magic
)))
3127 log(0, 0, 0, 0, "Bad state file magic\n");
3131 log(1, 0, 0, 0, "Reading state information\n");
3132 if (fread(buf
, sizeof(buf
), 1, f
) != 1 || buf
[0] > MAXIPPOOL
|| buf
[1] != sizeof(ippoolt
))
3134 log(0, 0, 0, 0, "Error/mismatch reading ip pool header from state file\n");
3138 if (buf
[0] > ip_pool_size
)
3140 log(0, 0, 0, 0, "ip pool has shrunk! state = %d, current = %d\n", buf
[0], ip_pool_size
);
3144 log(2, 0, 0, 0, "Loading %u ip addresses\n", buf
[0]);
3145 for (i
= 0; i
< buf
[0]; i
++)
3147 if (fread(&itmp
, sizeof(itmp
), 1, f
) != 1)
3149 log(0, 0, 0, 0, "Error reading ip %d from state file: %s\n", i
, strerror(errno
));
3153 if (itmp
.address
!= ip_address_pool
[i
].address
)
3155 log(0, 0, 0, 0, "Mismatched ip %d from state file: pool may only be extended\n", i
);
3159 memcpy(&ip_address_pool
[i
], &itmp
, sizeof(itmp
));
3162 if (fread(buf
, sizeof(buf
), 1, f
) != 1 || buf
[0] != MAXTUNNEL
|| buf
[1] != sizeof(tunnelt
))
3164 log(0, 0, 0, 0, "Error/mismatch reading tunnel header from state file\n");
3168 log(2, 0, 0, 0, "Loading %u tunnels\n", MAXTUNNEL
);
3169 if (fread(tunnel
, sizeof(tunnelt
), MAXTUNNEL
, f
) != MAXTUNNEL
)
3171 log(0, 0, 0, 0, "Error reading tunnel data from state file\n");
3175 for (i
= 0; i
< MAXTUNNEL
; i
++)
3177 tunnel
[i
].controlc
= 0;
3178 tunnel
[i
].controls
= NULL
;
3179 tunnel
[i
].controle
= NULL
;
3180 if (*tunnel
[i
].hostname
)
3181 log(3, 0, 0, 0, "Created tunnel for %s\n", tunnel
[i
].hostname
);
3184 if (fread(buf
, sizeof(buf
), 1, f
) != 1 || buf
[0] != MAXSESSION
|| buf
[1] != sizeof(sessiont
))
3186 log(0, 0, 0, 0, "Error/mismatch reading session header from state file\n");
3190 log(2, 0, 0, 0, "Loading %u sessions\n", MAXSESSION
);
3191 if (fread(session
, sizeof(sessiont
), MAXSESSION
, f
) != MAXSESSION
)
3193 log(0, 0, 0, 0, "Error reading session data from state file\n");
3197 for (i
= 0; i
< MAXSESSION
; i
++)
3199 session
[i
].tbf_in
= 0;
3200 session
[i
].tbf_out
= 0;
3201 if (session
[i
].opened
)
3203 log(2, 0, i
, 0, "Loaded active session for user %s\n", session
[i
].user
);
3205 sessionsetup(session
[i
].tunnel
, i
);
3210 log(0, 0, 0, 0, "Loaded saved state information\n");
3218 if (!config
->save_state
)
3223 if (!(f
= fopen(STATEFILE
, "w")))
3226 log(1, 0, 0, 0, "Dumping state information\n");
3228 if (fwrite(DUMP_MAGIC
, sizeof(DUMP_MAGIC
) - 1, 1, f
) != 1)
3231 log(2, 0, 0, 0, "Dumping %u ip addresses\n", ip_pool_size
);
3232 buf
[0] = ip_pool_size
;
3233 buf
[1] = sizeof(ippoolt
);
3234 if (fwrite(buf
, sizeof(buf
), 1, f
) != 1)
3236 if (fwrite(ip_address_pool
, sizeof(ippoolt
), ip_pool_size
, f
) != ip_pool_size
)
3239 log(2, 0, 0, 0, "Dumping %u tunnels\n", MAXTUNNEL
);
3241 buf
[1] = sizeof(tunnelt
);
3242 if (fwrite(buf
, sizeof(buf
), 1, f
) != 1)
3244 if (fwrite(tunnel
, sizeof(tunnelt
), MAXTUNNEL
, f
) != MAXTUNNEL
)
3247 log(2, 0, 0, 0, "Dumping %u sessions\n", MAXSESSION
);
3248 buf
[0] = MAXSESSION
;
3249 buf
[1] = sizeof(sessiont
);
3250 if (fwrite(buf
, sizeof(buf
), 1, f
) != 1)
3252 if (fwrite(session
, sizeof(sessiont
), MAXSESSION
, f
) != MAXSESSION
)
3260 log(0, 0, 0, 0, "Can't write state information: %s\n", strerror(errno
));
3264 void build_chap_response(char *challenge
, u8 id
, u16 challenge_length
, char **challenge_response
)
3267 *challenge_response
= NULL
;
3269 if (!*config
->l2tpsecret
)
3271 log(0, 0, 0, 0, "LNS requested CHAP authentication, but no l2tp secret is defined\n");
3275 log(4, 0, 0, 0, " Building challenge response for CHAP request\n");
3277 *challenge_response
= (char *)calloc(17, 1);
3280 MD5Update(&ctx
, &id
, 1);
3281 MD5Update(&ctx
, config
->l2tpsecret
, strlen(config
->l2tpsecret
));
3282 MD5Update(&ctx
, challenge
, challenge_length
);
3283 MD5Final(*challenge_response
, &ctx
);
3288 static int facility_value(char *name
)
3291 for (i
= 0; facilitynames
[i
].c_name
; i
++)
3293 if (strcmp(facilitynames
[i
].c_name
, name
) == 0)
3294 return facilitynames
[i
].c_val
;
3299 void update_config()
3302 static int timeout
= 0;
3303 static int interval
= 0;
3313 if (*config
->log_filename
)
3315 if (strstr(config
->log_filename
, "syslog:") == config
->log_filename
)
3317 char *p
= config
->log_filename
+ 7;
3320 openlog("l2tpns", LOG_PID
, facility_value(p
));
3324 else if (strchr(config
->log_filename
, '/') == config
->log_filename
)
3326 if ((log_stream
= fopen((char *)(config
->log_filename
), "a")))
3328 fseek(log_stream
, 0, SEEK_END
);
3329 setbuf(log_stream
, NULL
);
3333 log_stream
= stderr
;
3334 setbuf(log_stream
, NULL
);
3340 log_stream
= stderr
;
3341 setbuf(log_stream
, NULL
);
3346 config
->numradiusservers
= 0;
3347 for (i
= 0; i
< MAXRADSERVER
; i
++)
3348 if (config
->radiusserver
[i
])
3350 config
->numradiusservers
++;
3351 // Set radius port: if not set, take the port from the
3352 // first radius server. For the first radius server,
3353 // take the #defined default value from l2tpns.h
3355 // test twice, In case someone works with
3356 // a secondary radius server without defining
3357 // a primary one, this will work even then.
3358 if (i
>0 && !config
->radiusport
[i
])
3359 config
->radiusport
[i
] = config
->radiusport
[i
-1];
3360 if (!config
->radiusport
[i
])
3361 config
->radiusport
[i
] = RADPORT
;
3364 if (!config
->numradiusservers
)
3366 log(0, 0, 0, 0, "No RADIUS servers defined!\n");
3369 config
->num_radfds
= 2 << RADIUS_SHIFT
;
3372 for (i
= 0; i
< MAXPLUGINS
; i
++)
3374 if (strcmp(config
->plugins
[i
], config
->old_plugins
[i
]) == 0)
3376 if (*config
->plugins
[i
])
3379 add_plugin(config
->plugins
[i
]);
3381 else if (*config
->old_plugins
[i
])
3384 remove_plugin(config
->old_plugins
[i
]);
3387 memcpy(config
->old_plugins
, config
->plugins
, sizeof(config
->plugins
));
3388 if (!config
->cleanup_interval
) config
->cleanup_interval
= 10;
3389 if (!config
->multi_read_count
) config
->multi_read_count
= 10;
3390 if (!config
->cluster_address
) config
->cluster_address
= inet_addr(DEFAULT_MCAST_ADDR
);
3391 if (!*config
->cluster_interface
)
3392 strncpy(config
->cluster_interface
, DEFAULT_MCAST_INTERFACE
, sizeof(config
->cluster_interface
) - 1);
3394 if (!config
->cluster_hb_interval
)
3395 config
->cluster_hb_interval
= PING_INTERVAL
; // Heartbeat every 0.5 seconds.
3397 if (!config
->cluster_hb_timeout
)
3398 config
->cluster_hb_timeout
= HB_TIMEOUT
; // 10 missed heartbeat triggers an election.
3400 if (interval
!= config
->cluster_hb_interval
|| timeout
!= config
->cluster_hb_timeout
)
3402 // Paranoia: cluster_check_master() treats 2 x interval + 1 sec as
3403 // late, ensure we're sufficiently larger than that
3404 int t
= 4 * config
->cluster_hb_interval
+ 11;
3406 if (config
->cluster_hb_timeout
< t
)
3408 log(0,0,0,0, "Heartbeat timeout %d too low, adjusting to %d\n", config
->cluster_hb_timeout
, t
);
3409 config
->cluster_hb_timeout
= t
;
3412 // Push timing changes to the slaves immediately if we're the master
3413 if (config
->cluster_iam_master
)
3414 cluster_heartbeat();
3416 interval
= config
->cluster_hb_interval
;
3417 timeout
= config
->cluster_hb_timeout
;
3421 if (*config
->pid_file
== '/' && !config
->wrote_pid
)
3424 if ((f
= fopen(config
->pid_file
, "w")))
3426 fprintf(f
, "%d\n", getpid());
3428 config
->wrote_pid
= 1;
3432 log(0, 0, 0, 0, "Can't write to PID file %s: %s\n", config
->pid_file
, strerror(errno
));
3436 config
->reload_config
= 0;
3439 void read_config_file()
3443 if (!config
->config_file
) return;
3444 if (!(f
= fopen(config
->config_file
, "r"))) {
3445 fprintf(stderr
, "Can't open config file %s: %s\n", config
->config_file
, strerror(errno
));
3449 log(3, 0, 0, 0, "Reading config file %s\n", config
->config_file
);
3451 log(3, 0, 0, 0, "Done reading config file\n");
3456 int sessionsetup(tunnelidt t
, sessionidt s
)
3458 // A session now exists, set it up
3464 CSTAT(call_sessionsetup
);
3467 log(3, session
[s
].ip
, s
, t
, "Doing session setup for session\n");
3469 if (!session
[s
].ip
|| session
[s
].ip
== 0xFFFFFFFE)
3471 assign_ip_address(s
);
3473 log(3, 0, s
, t
, " No IP allocated. Assigned %s from pool\n",
3474 inet_toa(htonl(session
[s
].ip
)));
3476 log(0, 0, s
, t
, " No IP allocated. The IP address pool is FULL!\n");
3480 // Make sure this is right
3481 session
[s
].tunnel
= t
;
3483 // zap old sessions with same IP and/or username
3484 // Don't kill gardened sessions - doing so leads to a DoS
3485 // from someone who doesn't need to know the password
3488 user
= session
[s
].user
;
3489 for (i
= 1; i
<= config
->cluster_highest_sessionid
; i
++)
3491 if (i
== s
) continue;
3492 if (ip
== session
[i
].ip
) sessionkill(i
, "Duplicate IP address");
3493 if (!session
[s
].walled_garden
&& !session
[i
].walled_garden
&& strcasecmp(user
, session
[i
].user
) == 0)
3494 sessionkill(i
, "Duplicate session for users");
3498 // Add the route for this session.
3500 // Static IPs need to be routed. Anything else
3501 // is part of the IP address pool and is already routed,
3502 // it just needs to be added to the IP cache.
3503 if (session
[s
].ip_pool_index
== -1) // static ip
3504 routeset(s
, session
[s
].ip
, 0, 0, 1);
3506 cache_ipmap(session
[s
].ip
, s
);
3508 for (r
= 0; r
< MAXROUTE
&& session
[s
].route
[r
].ip
; r
++)
3509 routeset(s
, session
[s
].route
[r
].ip
, session
[s
].route
[r
].mask
, session
[s
].ip
, 1);
3511 if (!session
[s
].sid
)
3513 // did this session just finish radius?
3514 log(3, session
[s
].ip
, s
, t
, "Sending initial IPCP to client\n");
3516 session
[s
].sid
= ++last_sid
;
3519 // Run the plugin's against this new session.
3521 struct param_new_session data
= { &tunnel
[t
], &session
[s
] };
3522 run_plugins(PLUGIN_NEW_SESSION
, &data
);
3525 // Force throttling on or off (Actually : refresh the current throttling status)
3526 // This has the advantage of cleaning up after another throttled user who may have left
3527 // firewall rules lying around
3528 throttle_session(s
, session
[s
].throttle
);
3530 session
[s
].last_packet
= time_now
;
3533 char *sessionip
, *tunnelip
;
3534 sessionip
= strdup(inet_toa(htonl(session
[s
].ip
)));
3535 tunnelip
= strdup(inet_toa(htonl(tunnel
[t
].ip
)));
3536 log(2, session
[s
].ip
, s
, t
, "Login by %s at %s from %s (%s)\n",
3537 session
[s
].user
, sessionip
, tunnelip
, tunnel
[t
].hostname
);
3538 if (sessionip
) free(sessionip
);
3539 if (tunnelip
) free(tunnelip
);
3542 cluster_send_session(s
); // Mark it as dirty, and needing to the flooded to the cluster.
3544 return 1; // RADIUS OK and IP allocated, done...
3548 // This session just got dropped on us by the master or something.
3549 // Make sure our tables up up to date...
3551 int load_session(sessionidt s
, sessiont
*new)
3556 if (new->ip_pool_index
>= MAXIPPOOL
||
3557 new->tunnel
>= MAXTUNNEL
) {
3558 log(0,0,s
,0, "Strange session update received!\n");
3559 // FIXME! What to do here?
3564 // Ok. All sanity checks passed. Now we're committed to
3565 // loading the new session.
3568 session
[s
].tunnel
= new->tunnel
; // For logging in cache_ipmap
3571 if (new->ip
!= session
[s
].ip
) // Changed ip. fix up hash tables.
3573 if (session
[s
].ip
) // If there's an old one, remove it.
3575 // Remove any routes if the IP has changed
3576 for (i
= 0; i
< MAXROUTE
&& session
[s
].route
[i
].ip
; i
++)
3578 routeset(s
, session
[s
].route
[i
].ip
, session
[s
].route
[i
].mask
, session
[s
].ip
, 0);
3579 session
[s
].route
[i
].ip
= 0;
3582 if (session
[s
].ip_pool_index
== -1) // static IP
3583 routeset(s
, session
[s
].ip
, 0, 0, 0);
3584 else // It's part of the IP pool, remove it manually.
3585 uncache_ipmap(session
[s
].ip
);
3588 if (new->ip
) { // If there's a new one, add it.
3589 if (new->ip_pool_index
== -1)
3590 routeset(s
, new->ip
, 0, 0, 1);
3592 cache_ipmap(new->ip
, s
);
3596 // Update routed networks
3597 for (i
= 0; i
< MAXROUTE
&& (session
[s
].route
[i
].ip
|| new->route
[i
].ip
); i
++)
3599 if (new->route
[i
].ip
== session
[s
].route
[i
].ip
&&
3600 new->route
[i
].mask
== session
[s
].route
[i
].mask
)
3603 if (session
[s
].route
[i
].ip
) // Remove the old one if it exists.
3604 routeset(s
, session
[s
].route
[i
].ip
, session
[s
].route
[i
].mask
, session
[s
].ip
, 0);
3606 if (new->route
[i
].ip
) // Add the new one if it exists.
3607 routeset(s
, new->route
[i
].ip
, new->route
[i
].mask
, new->ip
, 1);
3610 if (new->tunnel
&& s
> config
->cluster_highest_sessionid
) // Maintain this in the slave. It's used
3611 // for walking the sessions to forward byte counts to the master.
3612 config
->cluster_highest_sessionid
= s
;
3614 memcpy(&session
[s
], new, sizeof(session
[s
])); // Copy over..
3616 // Do fixups into address pool.
3617 if (new->ip_pool_index
!= -1)
3618 fix_address_pool(s
);
3624 void ringbuffer_dump(FILE *stream
)
3626 int i
= ringbuffer
->head
;
3628 while (i
!= ringbuffer
->tail
)
3630 if (*ringbuffer
->buffer
[i
].message
)
3631 fprintf(stream
, "%d-%s", ringbuffer
->buffer
[i
].level
, ringbuffer
->buffer
[i
].message
);
3632 if (++i
== ringbuffer
->tail
) break;
3633 if (i
== RINGBUFFER_SIZE
) i
= 0;
3642 loaded_plugins
= ll_init();
3643 // Initialize the plugins to nothing
3644 for (i
= 0; i
< MAX_PLUGIN_TYPES
; i
++)
3645 plugins
[i
] = ll_init();
3648 static void *open_plugin(char *plugin_name
, int load
)
3650 char path
[256] = "";
3652 snprintf(path
, 256, PLUGINDIR
"/%s.so", plugin_name
);
3653 log(2, 0, 0, 0, "%soading plugin from %s\n", load
? "L" : "Un-l", path
);
3654 return dlopen(path
, RTLD_NOW
);
3657 void add_plugin(char *plugin_name
)
3659 static struct pluginfuncs funcs
= {
3664 sessiontbysessionidt
,
3665 sessionidtbysessiont
,
3671 void *p
= open_plugin(plugin_name
, 1);
3672 int (*initfunc
)(struct pluginfuncs
*);
3677 log(1, 0, 0, 0, " Plugin load failed: %s\n", dlerror());
3681 if (ll_contains(loaded_plugins
, p
))
3688 int *v
= dlsym(p
, "__plugin_api_version");
3689 if (!v
|| *v
!= PLUGIN_API_VERSION
)
3691 log(1, 0, 0, 0, " Plugin load failed: API version mismatch: %s\n", dlerror());
3697 if ((initfunc
= dlsym(p
, "plugin_init")))
3699 if (!initfunc(&funcs
))
3701 log(1, 0, 0, 0, " Plugin load failed: plugin_init() returned FALSE: %s\n", dlerror());
3707 ll_push(loaded_plugins
, p
);
3709 for (i
= 0; i
< max_plugin_functions
; i
++)
3712 if (plugin_functions
[i
] && (x
= dlsym(p
, plugin_functions
[i
])))
3714 log(3, 0, 0, 0, " Supports function \"%s\"\n", plugin_functions
[i
]);
3715 ll_push(plugins
[i
], x
);
3719 log(2, 0, 0, 0, " Loaded plugin %s\n", plugin_name
);
3722 static void run_plugin_done(void *plugin
)
3724 int (*donefunc
)(void) = dlsym(plugin
, "plugin_done");
3730 void remove_plugin(char *plugin_name
)
3732 void *p
= open_plugin(plugin_name
, 0);
3738 for (i
= 0; i
< max_plugin_functions
; i
++)
3741 if (plugin_functions
[i
] && (x
= dlsym(p
, plugin_functions
[i
])))
3742 ll_delete(plugins
[i
], x
);
3745 if (ll_contains(loaded_plugins
, p
))
3747 ll_delete(loaded_plugins
, p
);
3752 log(2, 0, 0, 0, "Removed plugin %s\n", plugin_name
);
3755 int run_plugins(int plugin_type
, void *data
)
3757 int (*func
)(void *data
);
3758 if (!plugins
[plugin_type
] || plugin_type
> max_plugin_functions
) return 1;
3760 ll_reset(plugins
[plugin_type
]);
3761 while ((func
= ll_next(plugins
[plugin_type
])))
3765 if (rc
== PLUGIN_RET_STOP
) return 1;
3766 if (rc
== PLUGIN_RET_ERROR
) return 0;
3775 ll_reset(loaded_plugins
);
3776 while ((p
= ll_next(loaded_plugins
)))
3780 void processcontrol(u8
* buf
, int len
, struct sockaddr_in
*addr
)
3784 struct param_control param
= { buf
, len
, ntohl(addr
->sin_addr
.s_addr
), ntohs(addr
->sin_port
), NULL
, 0, 0 };
3787 if (log_stream
&& config
->debug
>= 4)
3789 log(4, ntohl(addr
->sin_addr
.s_addr
), 0, 0, "Received ");
3790 dump_packet(buf
, log_stream
);
3793 resp
= calloc(1400, 1);
3794 l
= new_packet(PKT_RESP_ERROR
, resp
);
3795 *(int *)(resp
+ 6) = *(int *)(buf
+ 6);
3797 param
.type
= ntohs(*(short *)(buf
+ 2));
3798 param
.id
= ntohl(*(int *)(buf
+ 6));
3799 param
.data_length
= ntohs(*(short *)(buf
+ 4)) - 10;
3800 param
.data
= (param
.data_length
> 0) ? (char *)(buf
+ 10) : NULL
;
3801 param
.response
= resp
;
3802 param
.response_length
= l
;
3804 run_plugins(PLUGIN_CONTROL
, ¶m
);
3806 if (param
.send_response
)
3808 send_packet(controlfd
, ntohl(addr
->sin_addr
.s_addr
), ntohs(addr
->sin_port
), param
.response
, param
.response_length
);
3809 log(4, ntohl(addr
->sin_addr
.s_addr
), 0, 0, "Sent Control packet response\n");
3817 * Go through all of the tunnels and do some cleanups
3823 log(1, 0, 0, 0, "Cleaning tunnels array\n");
3825 for (i
= 1; i
< MAXTUNNEL
; i
++)
3828 || !*tunnel
[i
].hostname
3829 || (tunnel
[i
].state
== TUNNELDIE
&& tunnel
[i
].die
>= time_now
))
3836 void tunnelclear(tunnelidt t
)
3839 memset(&tunnel
[t
], 0, sizeof(tunnel
[t
]));
3840 tunnel
[t
].state
= TUNNELFREE
;
3843 tunnelidt
new_tunnel()
3846 for (i
= 1; i
< MAXTUNNEL
; i
++)
3848 if (tunnel
[i
].state
== TUNNELFREE
)
3850 log(4, 0, 0, i
, "Assigning tunnel ID %d\n", i
);
3851 if (i
> config
->cluster_highest_tunnelid
)
3852 config
->cluster_highest_tunnelid
= i
;
3856 log(0, 0, 0, 0, "Can't find a free tunnel! There shouldn't be this many in use!\n");
3861 // We're becoming the master. Do any required setup..
3863 // This is principally telling all the plugins that we're
3864 // now a master, and telling them about all the sessions
3865 // that are active too..
3867 void become_master(void)
3870 run_plugins(PLUGIN_BECOME_MASTER
, NULL
);
3872 for (s
= 1; s
<= config
->cluster_highest_sessionid
; ++s
) {
3873 if (!session
[s
].tunnel
) // Not an in-use session.
3876 run_plugins(PLUGIN_NEW_SESSION_MASTER
, &session
[s
]);
3882 int cmd_show_hist_idle(struct cli_def
*cli
, char *command
, char **argv
, int argc
)
3888 if (CLI_HELP_REQUESTED
)
3889 return CLI_HELP_NO_ARGS
;
3892 for (i
= 0; i
< 64;++i
) buckets
[i
] = 0;
3894 for (s
= 1; s
<= config
->cluster_highest_sessionid
; ++s
) {
3896 if (!session
[s
].tunnel
)
3899 idle
= time_now
- session
[s
].last_packet
;
3900 idle
/= 5 ; // In multiples of 5 seconds.
3910 for (i
= 0; i
< 63; ++i
) {
3911 cli_print(cli
, "%3d seconds : %7.2f%% (%6d)", i
* 5, (double) buckets
[i
] * 100.0 / count
, buckets
[i
]);
3913 cli_print(cli
, "lots of secs : %7.2f%% (%6d)", (double) buckets
[63] * 100.0 / count
, buckets
[i
]);
3914 cli_print(cli
, "%d total sessions open.", count
);
3918 int cmd_show_hist_open(struct cli_def
*cli
, char *command
, char **argv
, int argc
)
3924 if (CLI_HELP_REQUESTED
)
3925 return CLI_HELP_NO_ARGS
;
3928 for (i
= 0; i
< 64;++i
) buckets
[i
] = 0;
3930 for (s
= 1; s
<= config
->cluster_highest_sessionid
; ++s
) {
3932 if (!session
[s
].tunnel
)
3935 d
= time_now
- session
[s
].opened
;
3938 while (d
> 1 && open
< 32) {
3947 for (i
= 0; i
< 30; ++i
) {
3948 cli_print(cli
, " < %8d seconds : %7.2f%% (%6d)", s
, (double) buckets
[i
] * 100.0 / count
, buckets
[i
]);
3951 cli_print(cli
, "%d total sessions open.", count
);