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 1.12 2004/07/08 16:54:35 bodea 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("l2tp_secret", l2tpsecret
, STRING
),
98 CONFIG("primary_dns", default_dns1
, IP
),
99 CONFIG("secondary_dns", default_dns2
, IP
),
100 CONFIG("save_state", save_state
, BOOL
),
101 CONFIG("primary_radius", radiusserver
[0], IP
),
102 CONFIG("secondary_radius", radiusserver
[1], IP
),
103 CONFIG("radius_accounting", radius_accounting
, BOOL
),
104 CONFIG("radius_secret", radiussecret
, STRING
),
105 CONFIG("bind_address", bind_address
, IP
),
106 CONFIG("send_garp", send_garp
, BOOL
),
107 CONFIG("throttle_speed", rl_rate
, UNSIGNED_LONG
),
108 CONFIG("accounting_dir", accounting_dir
, STRING
),
109 CONFIG("setuid", target_uid
, INT
),
110 CONFIG("dump_speed", dump_speed
, BOOL
),
111 CONFIG("cleanup_interval", cleanup_interval
, INT
),
112 CONFIG("multi_read_count", multi_read_count
, INT
),
113 CONFIG("scheduler_fifo", scheduler_fifo
, BOOL
),
114 CONFIG("icmp_rate", icmp_rate
, INT
),
115 CONFIG("cluster_address", cluster_address
, IP
),
116 CONFIG("cluster_interface", cluster_interface
, STRING
),
117 CONFIG("cluster_hb_interval", cluster_hb_interval
, INT
),
118 CONFIG("cluster_hb_timeout", cluster_hb_timeout
, INT
),
120 CONFIG("as_number", as_number
, SHORT
),
121 CONFIG("bgp_peer1", bgp_peer
[0], STRING
),
122 CONFIG("bgp_peer1_as", bgp_peer_as
[0], SHORT
),
123 CONFIG("bgp_peer2", bgp_peer
[1], STRING
),
124 CONFIG("bgp_peer2_as", bgp_peer_as
[1], SHORT
),
129 char *plugin_functions
[] = {
136 "plugin_new_session",
137 "plugin_kill_session",
139 "plugin_radius_response",
140 "plugin_become_master",
141 "plugin_new_session_master",
144 #define max_plugin_functions (sizeof(plugin_functions) / sizeof(char *))
146 tunnelt
*tunnel
= NULL
; // Array of tunnel structures.
147 sessiont
*session
= NULL
; // Array of session structures.
148 sessioncountt
*sess_count
= NULL
; // Array of partial per-session traffic counters.
149 radiust
*radius
= NULL
; // Array of radius structures.
150 ippoolt
*ip_address_pool
= NULL
; // Array of dynamic IP addresses.
151 controlt
*controlfree
= 0;
152 struct Tstats
*_statistics
= NULL
;
154 struct Tringbuffer
*ringbuffer
= NULL
;
157 void sigalrm_handler(int);
158 void sighup_handler(int);
159 void sigterm_handler(int);
160 void sigquit_handler(int);
161 void sigchild_handler(int);
162 void read_config_file();
166 tunnelidt
new_tunnel();
167 void update_config();
169 static void cache_ipmap(ipt ip
, int s
);
170 static void uncache_ipmap(ipt ip
);
172 // return internal time (10ths since process startup)
177 return (t
.tv_sec
- basetime
) * 10 + t
.tv_usec
/ 100000 + 1;
180 // work out a retry time based on try number
181 // This is a straight bounded exponential backoff.
182 // Maximum re-try time is 32 seconds. (2^5).
183 clockt
backoff(u8
try)
185 if (try > 5) try = 5; // max backoff
186 return now() + 10 * (1 << try);
191 // Log a debug message.
193 void _log(int level
, ipt address
, sessionidt s
, tunnelidt t
, const char *format
, ...)
195 static char message
[65536] = {0};
196 static char message2
[65536] = {0};
202 if (++ringbuffer
->tail
>= RINGBUFFER_SIZE
)
203 ringbuffer
->tail
= 0;
204 if (ringbuffer
->tail
== ringbuffer
->head
)
205 if (++ringbuffer
->head
>= RINGBUFFER_SIZE
)
206 ringbuffer
->head
= 0;
208 ringbuffer
->buffer
[ringbuffer
->tail
].level
= level
;
209 ringbuffer
->buffer
[ringbuffer
->tail
].address
= address
;
210 ringbuffer
->buffer
[ringbuffer
->tail
].session
= s
;
211 ringbuffer
->buffer
[ringbuffer
->tail
].tunnel
= t
;
212 va_start(ap
, format
);
213 vsnprintf(ringbuffer
->buffer
[ringbuffer
->tail
].message
, 4095, format
, ap
);
218 if (config
->debug
< level
) return;
220 va_start(ap
, format
);
223 vsnprintf(message2
, 65535, format
, ap
);
224 snprintf(message
, 65535, "%s %02d/%02d %s", time_now_string
, t
, s
, message2
);
225 fprintf(log_stream
, "%s", message
);
229 vsnprintf(message2
, 65535, format
, ap
);
230 snprintf(message
, 65535, "%02d/%02d %s", t
, s
, message2
);
231 syslog(level
+ 2, message
); // We don't need LOG_EMERG or LOG_ALERT
236 void _log_hex(int level
, ipt address
, sessionidt s
, tunnelidt t
, const char *title
, const char *data
, int maxsize
)
239 const u8
*d
= (const u8
*)data
;
241 if (config
->debug
< level
) return;
243 // No support for log_hex to syslog
246 log(level
, address
, s
, t
, "%s (%d bytes):\n", title
, maxsize
);
247 setvbuf(log_stream
, NULL
, _IOFBF
, 16384);
249 for (i
= 0; i
< maxsize
; )
251 fprintf(log_stream
, "%4X: ", i
);
252 for (j
= i
; j
< maxsize
&& j
< (i
+ 16); j
++)
254 fprintf(log_stream
, "%02X ", d
[j
]);
256 fputs(": ", log_stream
);
259 for (; j
< i
+ 16; j
++)
261 fputs(" ", log_stream
);
263 fputs(": ", log_stream
);
266 fputs(" ", log_stream
);
267 for (j
= i
; j
< maxsize
&& j
< (i
+ 16); j
++)
269 if (d
[j
] >= 0x20 && d
[j
] < 0x7f && d
[j
] != 0x20)
270 fputc(d
[j
], log_stream
);
272 fputc('.', log_stream
);
275 fputs(" ", log_stream
);
279 fputs("\n", log_stream
);
283 setbuf(log_stream
, NULL
);
290 // This adds it to the routing table, advertises it
291 // via iBGP if enabled, and stuffs it into the
292 // 'sessionbyip' cache.
294 // 'ip' and 'mask' must be in _host_ order.
296 void routeset(sessionidt s
, ipt ip
, ipt mask
, ipt gw
, u8 add
)
301 if (!mask
) mask
= 0xffffffff;
303 ip
&= mask
; // Force the ip to be the first one in the route.
305 memset(&r
, 0, sizeof(r
));
306 r
.rt_dev
= config
->tundevice
;
307 r
.rt_dst
.sa_family
= AF_INET
;
308 *(u32
*) & (((struct sockaddr_in
*) &r
.rt_dst
)->sin_addr
.s_addr
) = htonl(ip
);
309 r
.rt_gateway
.sa_family
= AF_INET
;
310 *(u32
*) & (((struct sockaddr_in
*) &r
.rt_gateway
)->sin_addr
.s_addr
) = htonl(gw
);
311 r
.rt_genmask
.sa_family
= AF_INET
;
312 *(u32
*) & (((struct sockaddr_in
*) &r
.rt_genmask
)->sin_addr
.s_addr
) = htonl(mask
);
313 r
.rt_flags
= (RTF_UP
| RTF_STATIC
);
315 r
.rt_flags
|= RTF_GATEWAY
;
316 else if (mask
== 0xffffffff)
317 r
.rt_flags
|= RTF_HOST
;
319 log(1, ip
, 0, 0, "Route %s %u.%u.%u.%u/%u.%u.%u.%u %u.%u.%u.%u\n",
321 ip
>> 24, ip
>> 16 & 0xff, ip
>> 8 & 0xff, ip
& 0xff,
322 mask
>> 24, mask
>> 16 & 0xff, mask
>> 8 & 0xff, mask
& 0xff,
323 gw
>> 24, gw
>> 16 & 0xff, gw
>> 8 & 0xff, gw
& 0xff);
325 if (ioctl(ifrfd
, add
? SIOCADDRT
: SIOCDELRT
, (void *) &r
) < 0)
326 log(0, 0, 0, 0, "routeset() error in ioctl: %s\n", strerror(errno
));
330 bgp_add_route(htonl(ip
), htonl(mask
));
332 bgp_del_route(htonl(ip
), htonl(mask
));
335 // Add/Remove the IPs to the 'sessionbyip' cache.
336 // Note that we add the zero address in the case of
337 // a network route. Roll on CIDR.
339 // Note that 's == 0' implies this is the address pool.
340 // We still cache it here, because it will pre-fill
341 // the malloc'ed tree.
345 if (!add
) // Are we deleting a route?
346 s
= 0; // Caching the session as '0' is the same as uncaching.
348 for (i
= ip
; (i
&mask
) == (ip
&mask
) ; ++i
)
354 // Set up TUN interface
358 struct sockaddr_in sin
= {0};
359 memset(&ifr
, 0, sizeof(ifr
));
360 ifr
.ifr_flags
= IFF_TUN
;
362 tunfd
= open(TUNDEVICE
, O_RDWR
);
365 log(0, 0, 0, 0, "Can't open %s: %s\n", TUNDEVICE
, strerror(errno
));
369 int flags
= fcntl(tunfd
, F_GETFL
, 0);
370 fcntl(tunfd
, F_SETFL
, flags
| O_NONBLOCK
);
372 if (ioctl(tunfd
, TUNSETIFF
, (void *) &ifr
) < 0)
374 log(0, 0, 0, 0, "Can't set tun interface: %s\n", strerror(errno
));
377 assert(strlen(ifr
.ifr_name
) < sizeof(config
->tundevice
));
378 strncpy(config
->tundevice
, ifr
.ifr_name
, sizeof(config
->tundevice
) - 1);
379 ifrfd
= socket(PF_INET
, SOCK_DGRAM
, IPPROTO_IP
);
381 sin
.sin_family
= AF_INET
;
382 sin
.sin_addr
.s_addr
= config
->bind_address
? config
->bind_address
: 0x01010101; // 1.1.1.1
383 memcpy(&ifr
.ifr_addr
, &sin
, sizeof(struct sockaddr
));
385 if (ioctl(ifrfd
, SIOCSIFADDR
, (void *) &ifr
) < 0)
387 log(0, 0, 0, 0, "Error setting tun address: %s\n", strerror(errno
));
390 /* Bump up the qlen to deal with bursts from the network */
392 if (ioctl(ifrfd
, SIOCSIFTXQLEN
, (void *) &ifr
) < 0)
394 log(0, 0, 0, 0, "Error setting tun queue length: %s\n", strerror(errno
));
397 ifr
.ifr_flags
= IFF_UP
;
398 if (ioctl(ifrfd
, SIOCSIFFLAGS
, (void *) &ifr
) < 0)
400 log(0, 0, 0, 0, "Error setting tun flags: %s\n", strerror(errno
));
403 if (ioctl(ifrfd
, SIOCGIFINDEX
, (void *) &ifr
) < 0)
405 log(0, 0, 0, 0, "Error setting tun ifindex: %s\n", strerror(errno
));
408 tunidx
= ifr
.ifr_ifindex
;
415 struct sockaddr_in addr
;
418 memset(&addr
, 0, sizeof(addr
));
419 addr
.sin_family
= AF_INET
;
420 addr
.sin_port
= htons(L2TPPORT
);
421 addr
.sin_addr
.s_addr
= config
->bind_address
;
422 udpfd
= socket(AF_INET
, SOCK_DGRAM
, IPPROTO_UDP
);
423 setsockopt(udpfd
, SOL_SOCKET
, SO_REUSEADDR
, &on
, sizeof(on
));
425 int flags
= fcntl(udpfd
, F_GETFL
, 0);
426 fcntl(udpfd
, F_SETFL
, flags
| O_NONBLOCK
);
428 if (bind(udpfd
, (void *) &addr
, sizeof(addr
)) < 0)
430 log(0, 0, 0, 0, "Error in UDP bind: %s\n", strerror(errno
));
433 snoopfd
= socket(AF_INET
, SOCK_DGRAM
, IPPROTO_UDP
);
436 memset(&addr
, 0, sizeof(addr
));
437 addr
.sin_family
= AF_INET
;
438 addr
.sin_port
= htons(1702);
439 controlfd
= socket(AF_INET
, SOCK_DGRAM
, 17);
440 setsockopt(controlfd
, SOL_SOCKET
, SO_REUSEADDR
, &on
, sizeof(on
));
441 if (bind(controlfd
, (void *) &addr
, sizeof(addr
)) < 0)
443 log(0, 0, 0, 0, "Error in control bind: %s\n", strerror(errno
));
449 // Find session by IP, < 1 for not found
451 // Confusingly enough, this 'ip' must be
452 // in _network_ order. This being the common
453 // case when looking it up from IP packet headers.
455 // We actually use this cache for two things.
456 // #1. For used IP addresses, this maps to the
457 // session ID that it's used by.
458 // #2. For un-used IP addresses, this maps to the
459 // index into the pool table that contains that
463 int lookup_ipmap(ipt ip
)
466 char **d
= (char **) ip_hash
;
469 if (!(d
= (char **) d
[(size_t) *a
++])) return 0;
470 if (!(d
= (char **) d
[(size_t) *a
++])) return 0;
471 if (!(d
= (char **) d
[(size_t) *a
++])) return 0;
473 s
= (ipt
) d
[(size_t) *a
];
477 sessionidt
sessionbyip(ipt ip
)
479 int s
= lookup_ipmap(ip
);
480 CSTAT(call_sessionbyip
);
482 if (s
> 0 && s
< MAXSESSION
&& session
[s
].tunnel
)
488 // Take an IP address in HOST byte order and
489 // add it to the sessionid by IP cache.
491 // (It's actually cached in network order)
493 static void cache_ipmap(ipt ip
, int s
)
495 ipt nip
= htonl(ip
); // MUST be in network order. I.e. MSB must in be ((char*)(&ip))[0]
497 char **d
= (char **) ip_hash
;
500 for (i
= 0; i
< 3; i
++)
502 if (!d
[(size_t) a
[i
]])
504 if (!(d
[(size_t) a
[i
]] = calloc(256, sizeof (void *))))
508 d
= (char **) d
[(size_t) a
[i
]];
511 d
[(size_t) a
[3]] = (char *)((int)s
);
514 log(4, ip
, s
, session
[s
].tunnel
, "Caching ip address %s\n", inet_toa(nip
));
516 log(4, ip
, 0, 0, "Un-caching ip address %s\n", inet_toa(nip
));
517 // else a map to an ip pool index.
520 static void uncache_ipmap(ipt ip
)
522 cache_ipmap(ip
, 0); // Assign it to the NULL session.
526 // CLI list to dump current ipcache.
528 int cmd_show_ipcache(struct cli_def
*cli
, char *command
, char **argv
, int argc
)
530 char **d
= (char **) ip_hash
, **e
, **f
, **g
;
534 if (CLI_HELP_REQUESTED
)
535 return CLI_HELP_NO_ARGS
;
537 cli_print(cli
, "%7s %s", "Sess#", "IP Address");
539 for (i
= 0; i
< 256; ++i
) {
542 for (j
= 0; j
< 256; ++j
) {
545 for (k
= 0; k
< 256; ++k
) {
548 for (l
= 0; l
< 256; ++l
) {
550 cli_print(cli
, "%7d %d.%d.%d.%d", (int) g
[l
], i
, j
, k
, l
);
556 cli_print(cli
, "%d entries in cache", count
);
561 // Find session by username, 0 for not found
562 // walled garden users aren't authenticated, so the username is
563 // reasonably useless. Ignore them to avoid incorrect actions
565 // This is VERY inefficent. Don't call it often. :)
567 sessionidt
sessionbyuser(char *username
)
570 CSTAT(call_sessionbyuser
);
572 for (s
= 1; s
< MAXSESSION
; ++s
) {
573 if (session
[s
].walled_garden
)
574 continue; // Skip walled garden users.
576 if (!strncmp(session
[s
].user
, username
, 128))
580 return 0; // Not found.
583 void send_garp(ipt ip
)
589 s
= socket(PF_INET
, SOCK_DGRAM
, 0);
592 log(0, 0, 0, 0, "Error creating socket for GARP: %s\n", strerror(errno
));
595 memset(&ifr
, 0, sizeof(ifr
));
596 strncpy(ifr
.ifr_name
, "eth0", sizeof(ifr
.ifr_name
) - 1);
597 if (ioctl(s
, SIOCGIFHWADDR
, &ifr
) < 0)
599 log(0, 0, 0, 0, "Error getting eth0 hardware address for GARP: %s\n", strerror(errno
));
603 memcpy(mac
, &ifr
.ifr_hwaddr
.sa_data
, 6*sizeof(char));
604 if (ioctl(s
, SIOCGIFINDEX
, &ifr
) < 0)
606 log(0, 0, 0, 0, "Error getting eth0 interface index for GARP: %s\n", strerror(errno
));
611 sendarp(ifr
.ifr_ifindex
, mac
, ip
);
614 // Find session by username, 0 for not found
615 sessiont
*sessiontbysessionidt(sessionidt s
)
617 if (!s
|| s
> MAXSESSION
) return NULL
;
621 sessionidt
sessionidtbysessiont(sessiont
*s
)
623 sessionidt val
= s
-session
;
624 if (s
< session
|| val
> MAXSESSION
) return 0;
628 // actually send a control message for a specific tunnel
629 void tunnelsend(u8
* buf
, u16 l
, tunnelidt t
)
631 struct sockaddr_in addr
;
633 CSTAT(call_tunnelsend
);
637 static int backtrace_count
= 0;
638 log(0, 0, 0, t
, "tunnelsend called with 0 as tunnel id\n");
639 STAT(tunnel_tx_errors
);
640 log_backtrace(backtrace_count
, 5)
646 static int backtrace_count
= 0;
647 log(1, 0, 0, t
, "Error sending data out tunnel: no remote endpoint (tunnel not set up)\n");
648 log_backtrace(backtrace_count
, 5)
649 STAT(tunnel_tx_errors
);
652 memset(&addr
, 0, sizeof(addr
));
653 addr
.sin_family
= AF_INET
;
654 *(u32
*) & addr
.sin_addr
= htonl(tunnel
[t
].ip
);
655 addr
.sin_port
= htons(tunnel
[t
].port
);
657 // sequence expected, if sequence in message
658 if (*buf
& 0x08) *(u16
*) (buf
+ ((*buf
& 0x40) ? 10 : 8)) = htons(tunnel
[t
].nr
);
660 // If this is a control message, deal with retries
663 tunnel
[t
].last
= time_now
; // control message sent
664 tunnel
[t
].retry
= backoff(tunnel
[t
].try); // when to resend
665 if (tunnel
[t
].try > 1)
667 STAT(tunnel_retries
);
668 log(3, tunnel
[t
].ip
, 0, t
, "Control message resend try %d\n", tunnel
[t
].try);
672 if (sendto(udpfd
, buf
, l
, 0, (void *) &addr
, sizeof(addr
)) < 0)
674 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",
675 strerror(errno
), udpfd
, buf
, l
, inet_ntoa(addr
.sin_addr
));
676 STAT(tunnel_tx_errors
);
680 log_hex(5, "Send Tunnel Data", buf
, l
);
681 STAT(tunnel_tx_packets
);
682 INC_STAT(tunnel_tx_bytes
, l
);
686 // Tiny helper function to write data to
689 int tun_write(u8
* data
, int size
)
691 return write(tunfd
, data
, size
);
694 // process outgoing (to tunnel) IP
696 void processipout(u8
* buf
, int len
)
703 char * data
= buf
; // Keep a copy of the originals.
708 CSTAT(call_processipout
);
710 if (len
< MIN_IP_SIZE
)
712 log(1, 0, 0, 0, "Short IP, %d bytes\n", len
);
713 STAT(tunnel_tx_errors
);
718 log(1, 0, 0, 0, "Oversize IP packet %d bytes\n", len
);
719 STAT(tunnel_tx_errors
);
723 // Skip the tun header
727 // Got an IP header now
728 if (*(u8
*)(buf
) >> 4 != 4)
730 log(1, 0, 0, 0, "IP: Don't understand anything except IPv4\n");
734 ip
= *(u32
*)(buf
+ 16);
735 if (!(s
= sessionbyip(ip
)))
737 // Is this a packet for a session that doesn't exist?
738 static int rate
= 0; // Number of ICMP packets we've sent this second.
739 static int last
= 0; // Last time we reset the ICMP packet counter 'rate'.
741 if (last
!= time_now
) {
746 if (rate
++ < config
->icmp_rate
) // Only send a max of icmp_rate per second.
748 log(4, 0, 0, 0, "IP: Sending ICMP host unreachable to %s\n", inet_toa(*(u32
*)(buf
+ 12)));
749 host_unreachable(*(u32
*)(buf
+ 12), *(u16
*)(buf
+ 4), ip
, buf
, (len
< 64) ? 64 : len
);
753 t
= session
[s
].tunnel
;
758 // Are we throttling this session?
759 if (config
->cluster_iam_master
)
760 tbf_queue_packet(sp
->tbf_out
, data
, size
);
762 master_throttle_packet(sp
->tbf_out
, data
, size
);
765 else if (sp
->walled_garden
&& !config
->cluster_iam_master
)
767 // We are walled-gardening this
768 master_garden_packet(s
, data
, size
);
772 // Snooping this session, send it to intercept box
773 if (sp
->snoop_ip
&& sp
->snoop_port
)
774 snoop_send_packet(buf
, len
, sp
->snoop_ip
, sp
->snoop_port
);
776 log(5, session
[s
].ip
, s
, t
, "Ethernet -> Tunnel (%d bytes)\n", len
);
778 // Add on L2TP header
780 u8
*p
= makeppp(b
, sizeof(b
), buf
, len
, t
, s
, PPPIP
);
782 log(3, session
[s
].ip
, s
, t
, "failed to send packet in processipout.\n");
785 tunnelsend(b
, len
+ (p
-b
), t
); // send it...
788 sp
->cout
+= len
; // byte count
789 sp
->total_cout
+= len
; // byte count
792 sess_count
[s
].cout
+= len
; // To send to master..
796 // Helper routine for the TBF filters.
797 // Used to send queued data in to the user!
799 void send_ipout(sessionidt s
, u8
*buf
, int len
)
807 if (len
< 0 || len
> MAXETHER
) {
808 log(1,0,0,0, "Odd size IP packet: %d bytes\n", len
);
812 // Skip the tun header
816 ip
= *(u32
*)(buf
+ 16);
820 t
= session
[s
].tunnel
;
823 log(5, session
[s
].ip
, s
, t
, "Ethernet -> Tunnel (%d bytes)\n", len
);
825 // Snooping this session.
826 if (sp
->snoop_ip
&& sp
->snoop_port
)
827 snoop_send_packet(buf
, len
, sp
->snoop_ip
, sp
->snoop_port
);
829 // Add on L2TP header
831 u8
*p
= makeppp(b
, sizeof(b
), buf
, len
, t
, s
, PPPIP
);
833 log(3, session
[s
].ip
, s
, t
, "failed to send packet in send_ipout.\n");
836 tunnelsend(b
, len
+ (p
-b
), t
); // send it...
838 sp
->cout
+= len
; // byte count
839 sp
->total_cout
+= len
; // byte count
842 sess_count
[s
].cout
+= len
; // To send to master..
845 // add an AVP (16 bit)
846 void control16(controlt
* c
, u16 avp
, u16 val
, u8 m
)
848 u16 l
= (m
? 0x8008 : 0x0008);
849 *(u16
*) (c
->buf
+ c
->length
+ 0) = htons(l
);
850 *(u16
*) (c
->buf
+ c
->length
+ 2) = htons(0);
851 *(u16
*) (c
->buf
+ c
->length
+ 4) = htons(avp
);
852 *(u16
*) (c
->buf
+ c
->length
+ 6) = htons(val
);
856 // add an AVP (32 bit)
857 void control32(controlt
* c
, u16 avp
, u32 val
, u8 m
)
859 u16 l
= (m
? 0x800A : 0x000A);
860 *(u16
*) (c
->buf
+ c
->length
+ 0) = htons(l
);
861 *(u16
*) (c
->buf
+ c
->length
+ 2) = htons(0);
862 *(u16
*) (c
->buf
+ c
->length
+ 4) = htons(avp
);
863 *(u32
*) (c
->buf
+ c
->length
+ 6) = htonl(val
);
867 // add an AVP (32 bit)
868 void controls(controlt
* c
, u16 avp
, char *val
, u8 m
)
870 u16 l
= ((m
? 0x8000 : 0) + strlen(val
) + 6);
871 *(u16
*) (c
->buf
+ c
->length
+ 0) = htons(l
);
872 *(u16
*) (c
->buf
+ c
->length
+ 2) = htons(0);
873 *(u16
*) (c
->buf
+ c
->length
+ 4) = htons(avp
);
874 memcpy(c
->buf
+ c
->length
+ 6, val
, strlen(val
));
875 c
->length
+= 6 + strlen(val
);
879 void controlb(controlt
* c
, u16 avp
, char *val
, unsigned int len
, u8 m
)
881 u16 l
= ((m
? 0x8000 : 0) + len
+ 6);
882 *(u16
*) (c
->buf
+ c
->length
+ 0) = htons(l
);
883 *(u16
*) (c
->buf
+ c
->length
+ 2) = htons(0);
884 *(u16
*) (c
->buf
+ c
->length
+ 4) = htons(avp
);
885 memcpy(c
->buf
+ c
->length
+ 6, val
, len
);
886 c
->length
+= 6 + len
;
889 // new control connection
890 controlt
*controlnew(u16 mtype
)
894 c
= malloc(sizeof(controlt
));
898 controlfree
= c
->next
;
902 *(u16
*) (c
->buf
+ 0) = htons(0xC802); // flags/ver
904 control16(c
, 0, mtype
, 1);
908 // send zero block if nothing is waiting
910 void controlnull(tunnelidt t
)
913 if (tunnel
[t
].controlc
) // Messages queued; They will carry the ack.
916 *(u16
*) (buf
+ 0) = htons(0xC802); // flags/ver
917 *(u16
*) (buf
+ 2) = htons(12); // length
918 *(u16
*) (buf
+ 4) = htons(tunnel
[t
].far
); // tunnel
919 *(u16
*) (buf
+ 6) = htons(0); // session
920 *(u16
*) (buf
+ 8) = htons(tunnel
[t
].ns
); // sequence
921 *(u16
*) (buf
+ 10) = htons(tunnel
[t
].nr
); // sequence
922 tunnelsend(buf
, 12, t
);
925 // add a control message to a tunnel, and send if within window
926 void controladd(controlt
* c
, tunnelidt t
, sessionidt s
)
928 *(u16
*) (c
->buf
+ 2) = htons(c
->length
); // length
929 *(u16
*) (c
->buf
+ 4) = htons(tunnel
[t
].far
); // tunnel
930 *(u16
*) (c
->buf
+ 6) = htons(s
? session
[s
].far
: 0); // session
931 *(u16
*) (c
->buf
+ 8) = htons(tunnel
[t
].ns
); // sequence
932 tunnel
[t
].ns
++; // advance sequence
933 // link in message in to queue
934 if (tunnel
[t
].controlc
)
935 tunnel
[t
].controle
->next
= c
;
937 tunnel
[t
].controls
= c
;
938 tunnel
[t
].controle
= c
;
939 tunnel
[t
].controlc
++;
940 // send now if space in window
941 if (tunnel
[t
].controlc
<= tunnel
[t
].window
)
943 tunnel
[t
].try = 0; // first send
944 tunnelsend(c
->buf
, c
->length
, t
);
949 // Throttle or Unthrottle a session
951 // Throttle the data folling through a session
952 // to be no more than 'throttle' kbit/sec each way.
954 int throttle_session(sessionidt s
, int throttle
)
956 if (!session
[s
].tunnel
)
957 return 0; // No-one home.
959 if (!*session
[s
].user
)
960 return 0; // User not logged in
963 if (session
[s
].tbf_in
|| session
[s
].tbf_out
) {
964 if (throttle
== session
[s
].throttle
)
967 // Currently throttled but the rate is changing.
969 free_tbf(session
[s
].tbf_in
);
970 free_tbf(session
[s
].tbf_out
);
973 session
[s
].tbf_in
= new_tbf(s
, throttle
*1024/4, throttle
*1024/8, send_ipin
);
974 session
[s
].tbf_out
= new_tbf(s
, throttle
*1024/4, throttle
*1024/8, send_ipout
);
976 if (throttle
!= session
[s
].throttle
) { // Changed. Flood to slaves.
977 session
[s
].throttle
= throttle
;
978 cluster_send_session(s
);
984 // else Unthrottling.
986 if (!session
[s
].tbf_in
&& !session
[s
].tbf_out
&& !session
[s
].throttle
)
989 free_tbf(session
[s
].tbf_in
);
990 session
[s
].tbf_in
= 0;
992 free_tbf(session
[s
].tbf_out
);
993 session
[s
].tbf_out
= 0;
995 if (throttle
!= session
[s
].throttle
) { // Changed. Flood to slaves.
996 session
[s
].throttle
= throttle
;
997 cluster_send_session(s
);
1003 // start tidy shutdown of session
1004 void sessionshutdown(sessionidt s
, char *reason
)
1006 int dead
= session
[s
].die
;
1007 int walled_garden
= session
[s
].walled_garden
;
1010 CSTAT(call_sessionshutdown
);
1012 if (!session
[s
].tunnel
)
1014 log(3, session
[s
].ip
, s
, session
[s
].tunnel
, "Called sessionshutdown on a session with no tunnel.\n");
1015 return; // not a live session
1018 if (!session
[s
].die
)
1019 log(2, 0, s
, session
[s
].tunnel
, "Shutting down session %d: %s\n", s
, reason
);
1021 session
[s
].die
= now() + 150; // Clean up in 15 seconds
1024 struct param_kill_session data
= { &tunnel
[session
[s
].tunnel
], &session
[s
] };
1025 run_plugins(PLUGIN_KILL_SESSION
, &data
);
1028 // RADIUS Stop message
1029 if (session
[s
].opened
&& !walled_garden
&& !dead
) {
1030 u16 r
= session
[s
].radius
;
1033 if (!(r
= radiusnew(s
)))
1035 log(1, 0, s
, session
[s
].tunnel
, "No free RADIUS sessions for Stop message\n");
1036 STAT(radius_overflow
);
1041 for (n
= 0; n
< 15; n
++)
1042 radius
[r
].auth
[n
] = rand();
1045 if (r
&& radius
[r
].state
!= RADIUSSTOP
)
1046 radiussend(r
, RADIUSSTOP
); // stop, if not already trying
1050 { // IP allocated, clear and unroute
1052 for (r
= 0; r
< MAXROUTE
&& session
[s
].route
[r
].ip
; r
++)
1054 routeset(s
, session
[s
].route
[r
].ip
, session
[s
].route
[r
].mask
, session
[s
].ip
, 0);
1055 session
[s
].route
[r
].ip
= 0;
1058 if (session
[s
].ip_pool_index
== -1) // static ip
1060 routeset(s
, session
[s
].ip
, 0, 0, 0); // Delete route.
1066 if (session
[s
].throttle
) // Unthrottle if throttled.
1067 throttle_session(s
, 0);
1070 controlt
*c
= controlnew(14); // sending CDN
1071 control16(c
, 1, 3, 1); // result code (admin reasons - TBA make error, general error, add message
1072 control16(c
, 14, s
, 1); // assigned session (our end)
1073 controladd(c
, session
[s
].tunnel
, s
); // send the message
1075 cluster_send_session(s
);
1078 void sendipcp(tunnelidt t
, sessionidt s
)
1081 u16 r
= session
[s
].radius
;
1084 CSTAT(call_sendipcp
);
1089 if (radius
[r
].state
!= RADIUSIPCP
)
1091 radius
[r
].state
= RADIUSIPCP
;
1095 radius
[r
].retry
= backoff(radius
[r
].try++);
1096 if (radius
[r
].try > 10)
1098 radiusclear(r
, s
); // Clear radius session.
1099 sessionshutdown(s
, "No reply on IPCP");
1103 q
= makeppp(buf
,sizeof(buf
), 0, 0, t
, s
, PPPIPCP
);
1105 log(3, session
[s
].ip
, s
, t
, "failed to send packet in sendipcp.\n");
1110 q
[1] = r
<< RADIUS_SHIFT
; // ID, dont care, we only send one type of request
1111 *(u16
*) (q
+ 2) = htons(10);
1114 *(u32
*) (q
+ 6) = config
->bind_address
; // send my IP
1115 tunnelsend(buf
, 10 + (q
- buf
), t
); // send it
1116 session
[s
].flags
&= ~SF_IPCP_ACKED
; // Clear flag.
1119 // kill a session now
1120 void sessionkill(sessionidt s
, char *reason
)
1123 CSTAT(call_sessionkill
);
1125 sessionshutdown(s
, reason
); // close radius/routes, etc.
1126 if (session
[s
].radius
)
1127 radiusclear(session
[s
].radius
, 0); // cant send clean accounting data, session is killed
1129 log(2, 0, s
, session
[s
].tunnel
, "Kill session %d (%s): %s\n", s
, session
[s
].user
, reason
);
1131 throttle_session(s
, 0); // Force session to be un-throttle. Free'ing TBF structures.
1133 memset(&session
[s
], 0, sizeof(session
[s
]));
1134 session
[s
].tunnel
= T_FREE
; // Mark it as free.
1135 session
[s
].next
= sessionfree
;
1137 cli_session_actions
[s
].action
= 0;
1138 cluster_send_session(s
);
1141 // kill a tunnel now
1142 void tunnelkill(tunnelidt t
, char *reason
)
1147 CSTAT(call_tunnelkill
);
1149 tunnel
[t
].state
= TUNNELDIE
;
1151 // free control messages
1152 while ((c
= tunnel
[t
].controls
))
1154 controlt
* n
= c
->next
;
1155 tunnel
[t
].controls
= n
;
1156 tunnel
[t
].controlc
--;
1157 c
->next
= controlfree
;
1161 for (s
= 1; s
< MAXSESSION
; s
++)
1162 if (session
[s
].tunnel
== t
)
1163 sessionkill(s
, reason
);
1167 log(1, 0, 0, t
, "Kill tunnel %d: %s\n", t
, reason
);
1168 cli_tunnel_actions
[s
].action
= 0;
1169 cluster_send_tunnel(t
);
1172 // shut down a tunnel cleanly
1173 void tunnelshutdown(tunnelidt t
, char *reason
)
1177 CSTAT(call_tunnelshutdown
);
1179 if (!tunnel
[t
].last
|| !tunnel
[t
].far
|| tunnel
[t
].state
== TUNNELFREE
)
1181 // never set up, can immediately kill
1182 tunnelkill(t
, reason
);
1185 log(1, 0, 0, t
, "Shutting down tunnel %d (%s)\n", t
, reason
);
1188 for (s
= 1; s
< MAXSESSION
; s
++)
1189 if (session
[s
].tunnel
== t
)
1190 sessionkill(s
, reason
);
1192 tunnel
[t
].state
= TUNNELDIE
;
1193 tunnel
[t
].die
= now() + 700; // Clean up in 70 seconds
1194 cluster_send_tunnel(t
);
1195 // TBA - should we wait for sessions to stop?
1197 controlt
*c
= controlnew(4); // sending StopCCN
1198 control16(c
, 1, 1, 1); // result code (admin reasons - TBA make error, general error, add message
1199 control16(c
, 9, t
, 1); // assigned tunnel (our end)
1200 controladd(c
, t
, 0); // send the message
1204 // read and process packet on tunnel (UDP)
1205 void processudp(u8
* buf
, int len
, struct sockaddr_in
*addr
)
1207 char *chapresponse
= NULL
;
1208 u16 l
= len
, t
= 0, s
= 0, ns
= 0, nr
= 0;
1212 CSTAT(call_processudp
);
1216 log_hex(5, "UDP Data", buf
, len
);
1217 STAT(tunnel_rx_packets
);
1218 INC_STAT(tunnel_rx_bytes
, len
);
1221 log(1, ntohl(addr
->sin_addr
.s_addr
), 0, 0, "Short UDP, %d bytes\n", len
);
1222 STAT(tunnel_rx_errors
);
1225 if ((buf
[1] & 0x0F) != 2)
1227 log(1, ntohl(addr
->sin_addr
.s_addr
), 0, 0, "Bad L2TP ver %d\n", (buf
[1] & 0x0F) != 2);
1228 STAT(tunnel_rx_errors
);
1233 l
= ntohs(*(u16
*) p
);
1236 t
= ntohs(*(u16
*) p
);
1238 s
= ntohs(*(u16
*) p
);
1240 if (s
>= MAXSESSION
)
1242 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Received UDP packet with invalid session ID\n");
1243 STAT(tunnel_rx_errors
);
1248 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Received UDP packet with invalid tunnel ID\n");
1249 STAT(tunnel_rx_errors
);
1254 ns
= ntohs(*(u16
*) p
);
1256 nr
= ntohs(*(u16
*) p
);
1261 u16 o
= ntohs(*(u16
*) p
);
1266 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Bad length %d>%d\n", (p
- buf
), l
);
1267 STAT(tunnel_rx_errors
);
1273 u16 message
= 0xFFFF; // message type
1275 u8 mandatorymessage
= 0;
1276 u8 chap
= 0; // if CHAP being used
1277 u16 asession
= 0; // assigned session
1278 u32 amagic
= 0; // magic number
1279 u8 aflags
= 0; // flags from last LCF
1280 u16 version
= 0x0100; // protocol version (we handle 0.0 as well and send that back just in case)
1281 int requestchap
= 0; // do we request PAP instead of original CHAP request?
1282 char called
[MAXTEL
] = ""; // called number
1283 char calling
[MAXTEL
] = ""; // calling number
1285 if (!config
->cluster_iam_master
) {
1286 master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
);
1290 if ((*buf
& 0xCA) != 0xC8)
1292 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Bad control header %02X\n", *buf
);
1293 STAT(tunnel_rx_errors
);
1296 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",
1297 l
, tunnel
[t
].controlc
, tunnel
[t
].ns
, tunnel
[t
].nr
, ns
, nr
);
1298 // if no tunnel specified, assign one
1304 // Is this a duplicate of the first packet? (SCCRQ)
1306 for ( i
= 1; i
<= config
->cluster_highest_tunnelid
; ++i
) {
1307 if (tunnel
[t
].state
!= TUNNELOPENING
||
1308 tunnel
[t
].ip
!= ntohl(*(ipt
*) & addr
->sin_addr
) ||
1309 tunnel
[t
].port
!= ntohs(addr
->sin_port
) )
1317 if (!(t
= new_tunnel()))
1319 log(1, ntohl(addr
->sin_addr
.s_addr
), 0, 0, "No more tunnels\n");
1320 STAT(tunnel_overflow
);
1324 tunnel
[t
].ip
= ntohl(*(ipt
*) & addr
->sin_addr
);
1325 tunnel
[t
].port
= ntohs(addr
->sin_port
);
1326 tunnel
[t
].window
= 4; // default window
1327 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
);
1328 STAT(tunnel_created
);
1331 // This is used to time out old tunnels
1332 tunnel
[t
].lastrec
= time_now
;
1334 // check sequence of this message
1336 int skip
= tunnel
[t
].window
; // track how many in-window packets are still in queue
1337 // some to clear maybe?
1338 while (tunnel
[t
].controlc
&& (((tunnel
[t
].ns
- tunnel
[t
].controlc
) - nr
) & 0x8000))
1340 controlt
*c
= tunnel
[t
].controls
;
1341 tunnel
[t
].controls
= c
->next
;
1342 tunnel
[t
].controlc
--;
1343 c
->next
= controlfree
;
1346 tunnel
[t
].try = 0; // we have progress
1349 // If the 'ns' just received is not the 'nr' we're
1350 // expecting, just send an ack and drop it.
1352 // if 'ns' is less, then we got a retransmitted packet.
1353 // if 'ns' is greater than missed a packet. Either way
1354 // we should ignore it.
1355 if (ns
!= tunnel
[t
].nr
)
1357 // is this the sequence we were expecting?
1358 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
);
1359 STAT(tunnel_rx_errors
);
1361 if (l
) // Is this not a ZLB?
1365 // receiver advance (do here so quoted correctly in any sends below)
1366 if (l
) tunnel
[t
].nr
= (ns
+ 1);
1367 if (skip
< 0) skip
= 0;
1368 if (skip
< tunnel
[t
].controlc
)
1370 // some control packets can now be sent that were previous stuck out of window
1371 int tosend
= tunnel
[t
].window
- skip
;
1372 controlt
*c
= tunnel
[t
].controls
;
1380 tunnel
[t
].try = 0; // first send
1381 tunnelsend(c
->buf
, c
->length
, t
);
1386 if (!tunnel
[t
].controlc
)
1387 tunnel
[t
].retry
= 0; // caught up
1390 { // if not a null message
1392 while (l
&& !(fatal
& 0x80))
1394 u16 n
= (ntohs(*(u16
*) p
) & 0x3FF);
1401 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Invalid length in AVP\n");
1402 STAT(tunnel_rx_errors
);
1409 // handle hidden AVPs
1410 if (!*config
->l2tpsecret
)
1412 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Hidden AVP requested, but no L2TP secret.\n");
1416 if (!session
[s
].random_vector_length
)
1418 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Hidden AVP requested, but no random vector.\n");
1422 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Hidden AVP\n");
1426 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Unrecognised AVP flags %02X\n", *b
);
1433 log(2, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Unknown AVP vendor %d\n", ntohs(*(u16
*) (b
)));
1438 mtype
= ntohs(*(u16
*) (b
));
1442 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " AVP %d (%s) len %d\n", mtype
, avpnames
[mtype
], n
);
1445 case 0: // message type
1446 message
= ntohs(*(u16
*) b
);
1447 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Message type = %d (%s)\n", *b
,
1448 l2tp_message_types
[message
]);
1449 mandatorymessage
= flags
;
1451 case 1: // result code
1453 u16 rescode
= ntohs(*(u16
*)(b
));
1454 const char* resdesc
= "(unknown)";
1455 if (message
== 4) { /* StopCCN */
1456 if (rescode
<= MAX_STOPCCN_RESULT_CODE
)
1457 resdesc
= stopccn_result_codes
[rescode
];
1458 } else if (message
== 14) { /* CDN */
1459 if (rescode
<= MAX_CDN_RESULT_CODE
)
1460 resdesc
= cdn_result_codes
[rescode
];
1463 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Result Code %d: %s\n",
1466 u16 errcode
= ntohs(*(u16
*)(b
+ 2));
1467 const char* errdesc
= "(unknown)";
1468 if (errcode
<= MAX_ERROR_CODE
)
1469 errdesc
= error_codes
[errcode
];
1470 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Error Code %d: %s\n",
1474 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Error String: %.*s\n",
1480 case 2: // protocol version
1482 version
= ntohs(*(u16
*) (b
));
1483 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Protocol version = %d\n", version
);
1484 if (version
&& version
!= 0x0100)
1485 { // allow 0.0 and 1.0
1486 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Bad protocol version %04X\n",
1493 case 3: // framing capabilities
1494 // log(4, ntohl(addr->sin_addr.s_addr), s, t, "Framing capabilities\n");
1496 case 4: // bearer capabilities
1497 // log(4, ntohl(addr->sin_addr.s_addr), s, t, "Bearer capabilities\n");
1499 case 5: // tie breaker
1500 // We never open tunnels, so we don't care about tie breakers
1501 // log(4, ntohl(addr->sin_addr.s_addr), s, t, "Tie breaker\n");
1503 case 6: // firmware revision
1504 // log(4, ntohl(addr->sin_addr.s_addr), s, t, "Firmware revision\n");
1506 case 7: // host name
1507 memset(tunnel
[t
].hostname
, 0, 128);
1508 memcpy(tunnel
[t
].hostname
, b
, (n
>= 127) ? 127 : n
);
1509 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Tunnel hostname = \"%s\"\n", tunnel
[t
].hostname
);
1510 // TBA - to send to RADIUS
1512 case 8: // vendor name
1513 memset(tunnel
[t
].vendor
, 0, sizeof(tunnel
[t
].vendor
));
1514 memcpy(tunnel
[t
].vendor
, b
, (n
>= sizeof(tunnel
[t
].vendor
) - 1) ? sizeof(tunnel
[t
].vendor
) - 1 : n
);
1515 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Vendor name = \"%s\"\n", tunnel
[t
].vendor
);
1517 case 9: // assigned tunnel
1518 tunnel
[t
].far
= ntohs(*(u16
*) (b
));
1519 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Remote tunnel id = %d\n", tunnel
[t
].far
);
1521 case 10: // rx window
1522 tunnel
[t
].window
= ntohs(*(u16
*) (b
));
1523 if (!tunnel
[t
].window
)
1524 tunnel
[t
].window
= 1; // window of 0 is silly
1525 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " rx window = %d\n", tunnel
[t
].window
);
1527 case 11: // Challenge
1529 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " LAC requested CHAP authentication for tunnel\n");
1530 build_chap_response(b
, 2, n
, &chapresponse
);
1533 case 14: // assigned session
1534 asession
= session
[s
].far
= ntohs(*(u16
*) (b
));
1535 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " assigned session = %d\n", asession
);
1537 case 15: // call serial number
1538 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " call serial number = %d\n", ntohl(*(u32
*)b
));
1540 case 18: // bearer type
1541 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " bearer type = %d\n", ntohl(*(u32
*)b
));
1544 case 19: // framing type
1545 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " framing type = %d\n", ntohl(*(u32
*)b
));
1548 case 21: // called number
1549 memset(called
, 0, MAXTEL
);
1550 memcpy(called
, b
, (n
>= MAXTEL
) ? (MAXTEL
-1) : n
);
1551 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Called <%s>\n", called
);
1553 case 22: // calling number
1554 memset(calling
, 0, MAXTEL
);
1555 memcpy(calling
, b
, (n
>= MAXTEL
) ? (MAXTEL
-1) : n
);
1556 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Calling <%s>\n", calling
);
1558 case 24: // tx connect speed
1561 session
[s
].tx_connect_speed
= ntohl(*(u32
*)b
);
1565 // AS5300s send connect speed as a string
1567 memcpy(tmp
, b
, (n
>= 30) ? 30 : n
);
1568 session
[s
].tx_connect_speed
= atol(tmp
);
1570 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " TX connect speed <%u>\n",
1571 session
[s
].tx_connect_speed
);
1573 case 38: // rx connect speed
1576 session
[s
].rx_connect_speed
= ntohl(*(u32
*)b
);
1580 // AS5300s send connect speed as a string
1582 memcpy(tmp
, b
, (n
>= 30) ? 30 : n
);
1583 session
[s
].rx_connect_speed
= atol(tmp
);
1585 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " RX connect speed <%u>\n",
1586 session
[s
].rx_connect_speed
);
1588 case 25: // Physical Channel ID
1590 u32 tmp
= ntohl(*(u32
*)b
);
1591 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Physical Channel ID <%X>\n", tmp
);
1594 case 29: // Proxy Authentication Type
1596 u16 authtype
= ntohs(*(u16
*)b
);
1597 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Proxy Auth Type %d (%s)\n",
1598 authtype
, authtypes
[authtype
]);
1599 requestchap
= (authtype
== 2);
1602 case 30: // Proxy Authentication Name
1604 char authname
[64] = {0};
1605 memcpy(authname
, b
, (n
> 63) ? 63 : n
);
1606 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Proxy Auth Name (%s)\n",
1610 case 31: // Proxy Authentication Challenge
1612 memcpy(radius
[session
[s
].radius
].auth
, b
, 16);
1613 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Proxy Auth Challenge\n");
1616 case 32: // Proxy Authentication ID
1618 u16 authid
= ntohs(*(u16
*)(b
));
1619 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Proxy Auth ID (%d)\n",
1621 if (session
[s
].radius
)
1622 radius
[session
[s
].radius
].id
= authid
;
1625 case 33: // Proxy Authentication Response
1627 char authresp
[64] = {0};
1628 memcpy(authresp
, b
, (n
> 63) ? 63 : n
);
1629 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Proxy Auth Response\n");
1632 case 27: // last send lcp
1633 { // find magic number
1634 u8
*p
= b
, *e
= p
+ n
;
1635 while (p
< e
&& p
[1])
1637 if (*p
== 5 && p
[1] == 6)
1638 amagic
= ntohl(*(u32
*) (p
+ 2));
1639 else if (*p
== 3 && p
[1] == 5 && *(u16
*) (p
+ 2) == htons(PPPCHAP
) && p
[4] == 5)
1642 aflags
|= SESSIONPFC
;
1644 aflags
|= SESSIONACFC
;
1649 char tmp
[500] = {0};
1651 memcpy((tmp
+ 1), b
, n
);
1655 case 28: // last recv lcp confreq
1657 char tmp
[500] = {0};
1659 memcpy((tmp
+ 1), b
, n
);
1662 case 26: // Initial Received LCP CONFREQ
1664 char tmp
[500] = {0};
1666 memcpy((tmp
+ 1), b
, n
);
1669 case 39: // seq required - we control it as an LNS anyway...
1671 case 36: // Random Vector
1672 log(4, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Random Vector received. Enabled AVP Hiding.\n");
1673 memset(session
[s
].random_vector
, 0, sizeof(session
[s
].random_vector
));
1674 memcpy(session
[s
].random_vector
, b
, n
);
1675 session
[s
].random_vector_length
= n
;
1678 log(2, ntohl(addr
->sin_addr
.s_addr
), s
, t
, " Unknown AVP type %d\n", mtype
);
1685 tunnelshutdown(t
, "Unknown Mandatory AVP");
1689 case 1: // SCCRQ - Start Control Connection Request
1691 controlt
*c
= controlnew(2); // sending SCCRP
1692 control16(c
, 2, version
, 1); // protocol version
1693 control32(c
, 3, 3, 1); // framing
1694 controls(c
, 7, tunnel
[t
].hostname
, 1); // host name (TBA)
1695 if (chapresponse
) controlb(c
, 13, chapresponse
, 16, 1); // Challenge response
1696 control16(c
, 9, t
, 1); // assigned tunnel
1697 controladd(c
, t
, s
); // send the resply
1699 tunnel
[t
].state
= TUNNELOPENING
;
1702 tunnel
[t
].state
= TUNNELOPEN
;
1705 tunnel
[t
].state
= TUNNELOPEN
;
1706 controlnull(t
); // ack
1709 controlnull(t
); // ack
1710 tunnelshutdown(t
, "Stopped"); // Shut down cleanly
1711 tunnelkill(t
, "Stopped"); // Immediately force everything dead
1714 controlnull(t
); // simply ACK
1728 STAT(session_overflow
);
1729 tunnelshutdown(t
, "No free sessions");
1737 sessionfree
= session
[s
].next
;
1738 memset(&session
[s
], 0, sizeof(session
[s
]));
1740 if (s
> config
->cluster_highest_sessionid
)
1741 config
->cluster_highest_sessionid
= s
;
1743 // make a RADIUS session
1744 if (!(r
= radiusnew(s
)))
1746 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "No free RADIUS sessions for ICRQ\n");
1747 sessionkill(s
, "no free RADIUS sesions");
1751 c
= controlnew(11); // sending ICRP
1752 session
[s
].id
= sessionid
++;
1753 session
[s
].opened
= time(NULL
);
1754 session
[s
].tunnel
= t
;
1755 session
[s
].far
= asession
;
1756 session
[s
].last_packet
= time_now
;
1757 log(3, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "New session (%d/%d)\n", tunnel
[t
].far
, session
[s
].far
);
1758 control16(c
, 14, s
, 1); // assigned session
1759 controladd(c
, t
, s
); // send the reply
1761 // Generate a random challenge
1763 for (n
= 0; n
< 15; n
++)
1764 radius
[r
].auth
[n
] = rand();
1766 strncpy(radius
[r
].calling
, calling
, sizeof(radius
[r
].calling
) - 1);
1767 strncpy(session
[s
].called
, called
, sizeof(session
[s
].called
) - 1);
1768 strncpy(session
[s
].calling
, calling
, sizeof(session
[s
].calling
) - 1);
1769 STAT(session_created
);
1776 session
[s
].magic
= amagic
; // set magic number
1777 session
[s
].l2tp_flags
= aflags
; // set flags received
1778 log(3, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Magic %X Flags %X\n", amagic
, aflags
);
1779 controlnull(t
); // ack
1780 // In CHAP state, request PAP instead
1785 controlnull(t
); // ack
1786 sessionshutdown(s
, "Closed (Received CDN)");
1789 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Missing message type\n");
1792 STAT(tunnel_rx_errors
);
1793 if (mandatorymessage
& 0x80)
1794 tunnelshutdown(t
, "Unknown message");
1796 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Unknown message type %d\n", message
);
1799 if (chapresponse
) free(chapresponse
);
1800 cluster_send_tunnel(t
);
1804 log(4, 0, s
, t
, " Got a ZLB ack\n");
1811 log_hex(5, "Receive Tunnel Data", p
, l
);
1812 if (l
> 2 && p
[0] == 0xFF && p
[1] == 0x03)
1813 { // HDLC address header, discard
1819 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Short ppp length %d\n", l
);
1820 STAT(tunnel_rx_errors
);
1830 prot
= ntohs(*(u16
*) p
);
1835 if (s
&& !session
[s
].tunnel
) // Is something wrong??
1837 if (!config
->cluster_iam_master
)
1839 // Pass it off to the master to deal with..
1840 master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
);
1845 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "UDP packet contains session %d "
1846 "but no session[%d].tunnel exists (LAC said"
1847 " tunnel = %d). Dropping packet.\n", s
, s
, t
);
1848 STAT(tunnel_rx_errors
);
1854 log(3, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Session %d is closing. Don't process PPP packets\n", s
);
1855 // I'm pretty sure this isn't right -- mo.
1856 // return; // closing session, PPP not processed
1860 session
[s
].last_packet
= time_now
;
1861 if (!config
->cluster_iam_master
) { master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
); return; }
1862 processpap(t
, s
, p
, l
);
1864 else if (prot
== PPPCHAP
)
1866 session
[s
].last_packet
= time_now
;
1867 if (!config
->cluster_iam_master
) { master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
); return; }
1868 processchap(t
, s
, p
, l
);
1870 else if (prot
== PPPLCP
)
1872 session
[s
].last_packet
= time_now
;
1873 if (!config
->cluster_iam_master
) { master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
); return; }
1874 processlcp(t
, s
, p
, l
);
1876 else if (prot
== PPPIPCP
)
1878 session
[s
].last_packet
= time_now
;
1879 if (!config
->cluster_iam_master
) { master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
); return; }
1880 processipcp(t
, s
, p
, l
);
1882 else if (prot
== PPPCCP
)
1884 session
[s
].last_packet
= time_now
;
1885 if (!config
->cluster_iam_master
) { master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
); return; }
1886 processccp(t
, s
, p
, l
);
1888 else if (prot
== PPPIP
)
1890 if (!config
->cluster_iam_master
)
1892 // We're a slave. Should we forward this packet to the master?
1894 // Is this a walled garden session, or something that needs it's
1895 // idle time updated??
1897 // Maintain the idle timeouts on the master. If this would
1898 // significantly reset the idletimeout, run it via the master
1899 // to refresh the master's idle timer.
1900 // Not sure this is ideal: It may re-order packets.
1902 if (session
[s
].walled_garden
|| (session
[s
].last_packet
+ (ECHO_TIMEOUT
/2)) < time_now
)
1904 master_forward_packet(buf
, len
, addr
->sin_addr
.s_addr
, addr
->sin_port
);
1905 session
[s
].last_packet
= time_now
;
1908 // fall through to processipin.
1910 session
[s
].last_packet
= time_now
;
1911 processipin(t
, s
, p
, l
);
1915 STAT(tunnel_rx_errors
);
1916 log(1, ntohl(addr
->sin_addr
.s_addr
), s
, t
, "Unknown PPP protocol %04X\n", prot
);
1921 // read and process packet on tun
1922 void processtun(u8
* buf
, int len
)
1924 log_hex(5, "Receive TUN Data", buf
, len
);
1925 STAT(tun_rx_packets
);
1926 INC_STAT(tun_rx_bytes
, len
);
1928 CSTAT(call_processtun
);
1934 log(1, 0, 0, 0, "Short tun packet %d bytes\n", len
);
1935 STAT(tun_rx_errors
);
1939 if (*(u16
*) (buf
+ 2) == htons(PKTIP
)) // IP
1940 processipout(buf
, len
);
1945 // Maximum number of actions to complete.
1946 // This is to avoid sending out too many packets
1948 #define MAX_ACTIONS 500
1950 int regular_cleanups(void)
1952 static sessionidt s
= 0; // Next session to check for actions on.
1956 static clockt next_acct
= 0;
1959 log(3, 0, 0, 0, "Begin regular cleanup\n");
1961 for (r
= 1; r
< MAXRADIUS
; r
++)
1963 if (!radius
[r
].state
)
1965 if (radius
[r
].retry
)
1967 if (radius
[r
].retry
<= TIME
)
1970 radius
[r
].retry
= backoff(radius
[r
].try+1); // Is this really needed? --mo
1972 for (t
= 1; t
<= config
->cluster_highest_tunnelid
; t
++)
1974 // check for expired tunnels
1975 if (tunnel
[t
].die
&& tunnel
[t
].die
<= TIME
)
1977 STAT(tunnel_timeout
);
1978 tunnelkill(t
, "Expired");
1981 // check for message resend
1982 if (tunnel
[t
].retry
&& tunnel
[t
].controlc
)
1984 // resend pending messages as timeout on reply
1985 if (tunnel
[t
].retry
<= TIME
)
1987 controlt
*c
= tunnel
[t
].controls
;
1988 u8 w
= tunnel
[t
].window
;
1989 tunnel
[t
].try++; // another try
1990 if (tunnel
[t
].try > 5)
1991 tunnelkill(t
, "Timeout on control message"); // game over
1995 tunnelsend(c
->buf
, c
->length
, t
);
2001 if (tunnel
[t
].state
== TUNNELOPEN
&& tunnel
[t
].lastrec
< TIME
+ 600)
2003 controlt
*c
= controlnew(6); // sending HELLO
2004 controladd(c
, t
, 0); // send the message
2005 log(3, tunnel
[t
].ip
, 0, t
, "Sending HELLO message\n");
2008 // Check for tunnel changes requested from the CLI
2009 if ((a
= cli_tunnel_actions
[t
].action
))
2011 cli_tunnel_actions
[t
].action
= 0;
2012 if (a
& CLI_TUN_KILL
)
2014 log(2, tunnel
[t
].ip
, 0, t
, "Dropping tunnel by CLI\n");
2015 tunnelshutdown(t
, "Requested by administrator");
2022 for (i
= 1; i
<= config
->cluster_highest_sessionid
; i
++)
2025 if (s
> config
->cluster_highest_sessionid
)
2028 if (!session
[s
].tunnel
) // Session isn't in use
2031 if (!session
[s
].die
&& session
[s
].ip
&& !(session
[s
].flags
& SF_IPCP_ACKED
) )
2033 // IPCP has not completed yet. Resend
2034 log(3, session
[s
].ip
, s
, session
[s
].tunnel
, "No ACK for initial IPCP ConfigReq... resending\n");
2035 sendipcp(session
[s
].tunnel
, s
);
2038 // check for expired sessions
2039 if (session
[s
].die
&& session
[s
].die
<= TIME
)
2041 sessionkill(s
, "Expired");
2042 if (++count
>= MAX_ACTIONS
) break;
2046 // Drop sessions who have not responded within IDLE_TIMEOUT seconds
2047 if (session
[s
].last_packet
&& (time_now
- session
[s
].last_packet
>= IDLE_TIMEOUT
))
2049 sessionkill(s
, "No response to LCP ECHO requests");
2050 STAT(session_timeout
);
2051 if (++count
>= MAX_ACTIONS
) break;
2055 // No data in IDLE_TIMEOUT seconds, send LCP ECHO
2056 if (session
[s
].user
[0] && (time_now
- session
[s
].last_packet
>= ECHO_TIMEOUT
))
2058 u8 b
[MAXCONTROL
] = {0};
2060 u8
*q
= makeppp(b
, sizeof(b
), 0, 0, session
[s
].tunnel
, s
, PPPLCP
);
2062 log(3, session
[s
].ip
, s
, t
, "failed to send ECHO packet.\n");
2067 *(u8
*)(q
+ 1) = (time_now
% 255); // ID
2068 *(u16
*)(q
+ 2) = htons(8); // Length
2069 *(u32
*)(q
+ 4) = 0; // Magic Number (not supported)
2071 log(4, session
[s
].ip
, s
, session
[s
].tunnel
, "No data in %d seconds, sending LCP ECHO\n",
2072 (int)(time_now
- session
[s
].last_packet
));
2073 tunnelsend(b
, 24, session
[s
].tunnel
); // send it
2074 if (++count
>= MAX_ACTIONS
) break;
2078 // Check for actions requested from the CLI
2079 if ((a
= cli_session_actions
[s
].action
))
2083 cli_session_actions
[s
].action
= 0;
2084 if (a
& CLI_SESS_KILL
)
2086 log(2, 0, s
, session
[s
].tunnel
, "Dropping session by CLI\n");
2087 sessionshutdown(s
, "Requested by administrator");
2088 a
= 0; // dead, no need to check for other actions
2091 if (a
& CLI_SESS_SNOOP
)
2093 log(2, 0, s
, session
[s
].tunnel
, "Snooping session by CLI (to %s:%d)\n",
2094 inet_toa(cli_session_actions
[s
].snoop_ip
), cli_session_actions
[s
].snoop_port
);
2096 session
[s
].snoop_ip
= cli_session_actions
[s
].snoop_ip
;
2097 session
[s
].snoop_port
= cli_session_actions
[s
].snoop_port
;
2101 if (a
& CLI_SESS_NOSNOOP
)
2103 log(2, 0, s
, session
[s
].tunnel
, "Unsnooping session by CLI\n");
2104 session
[s
].snoop_ip
= 0;
2105 session
[s
].snoop_port
= 0;
2109 if (a
& CLI_SESS_THROTTLE
)
2111 log(2, 0, s
, session
[s
].tunnel
, "Throttling session by CLI (to %d)\n",
2112 cli_session_actions
[s
].throttle
);
2114 throttle_session(s
, cli_session_actions
[s
].throttle
);
2117 if (a
& CLI_SESS_NOTHROTTLE
)
2119 log(2, 0, s
, session
[s
].tunnel
, "Un-throttling session by CLI\n");
2120 throttle_session(s
, 0);
2124 cluster_send_session(s
);
2126 if (++count
>= MAX_ACTIONS
) break;
2131 if (config
->accounting_dir
&& next_acct
<= TIME
)
2133 // Dump accounting data
2134 next_acct
= TIME
+ ACCT_TIME
;
2138 if (count
>= MAX_ACTIONS
)
2139 return 1; // Didn't finish!
2141 log(3, 0, 0, 0, "End regular cleanup (%d actions), next in %d seconds\n", count
, config
->cleanup_interval
);
2147 // Are we in the middle of a tunnel update, or radius
2150 int still_busy(void)
2153 static int last_talked
= 0;
2154 for (i
= config
->cluster_highest_tunnelid
; i
> 0 ; --i
) {
2155 if (!tunnel
[i
].controlc
)
2158 if (last_talked
!= TIME
) {
2159 log(2,0,0,0, "Tunnel %d still has un-acked control messages.\n", i
);
2165 for (i
= 1; i
< MAXRADIUS
; i
++)
2167 if (radius
[i
].state
== RADIUSNULL
)
2169 if (radius
[i
].state
== RADIUSWAIT
)
2172 if (last_talked
!= TIME
) {
2173 log(2,0,0,0, "Radius session %d is still busy (sid %d)\n", i
, radius
[i
].session
);
2182 // main loop - gets packets on tun or udp and processes them
2189 clockt next_cluster_ping
= 0; // send initial ping immediately
2190 time_t next_clean
= time_now
+ config
->cleanup_interval
;
2192 log(4, 0, 0, 0, "Beginning of main loop. udpfd=%d, tunfd=%d, cluster_sockfd=%d, controlfd=%d\n",
2193 udpfd
, tunfd
, cluster_sockfd
, controlfd
);
2198 FD_SET(controlfd
, &cr
);
2200 if (cluster_sockfd
) FD_SET(cluster_sockfd
, &cr
);
2202 if (cn
< tunfd
) cn
= tunfd
;
2203 if (cn
< controlfd
) cn
= controlfd
;
2204 if (cn
< clifd
) cn
= clifd
;
2205 if (cn
< cluster_sockfd
) cn
= cluster_sockfd
;
2206 for (i
= 0; i
< config
->num_radfds
; i
++)
2208 if (!radfds
[i
]) continue;
2209 FD_SET(radfds
[i
], &cr
);
2214 while (!main_quit
|| still_busy())
2220 int bgp_set
[BGP_NUM_PEERS
];
2223 if (config
->reload_config
)
2225 // Update the config state based on config settings
2229 memcpy(&r
, &cr
, sizeof(fd_set
));
2231 to
.tv_usec
= 100000; // 1/10th of a second.
2235 for (i
= 0; i
< BGP_NUM_PEERS
; i
++)
2237 bgp_set
[i
] = bgp_select_state(&bgp_peers
[i
]);
2240 FD_SET(bgp_peers
[i
].sock
, &r
);
2241 if (bgp_peers
[i
].sock
> n
)
2242 n
= bgp_peers
[i
].sock
;
2247 FD_SET(bgp_peers
[i
].sock
, &w
);
2248 if (bgp_peers
[i
].sock
> n
)
2249 n
= bgp_peers
[i
].sock
;
2253 n
= select(n
+ 1, &r
, &w
, 0, &to
);
2255 n
= select(n
+ 1, &r
, 0, 0, &to
);
2264 log(0, 0, 0, 0, "Error returned from select(): %s\n", strerror(errno
));
2270 struct sockaddr_in addr
;
2271 int alen
= sizeof(addr
);
2272 if (FD_ISSET(udpfd
, &r
))
2275 for (c
= 0; c
< config
->multi_read_count
; c
++)
2277 if ((n
= recvfrom(udpfd
, buf
, sizeof(buf
), 0, (void *) &addr
, &alen
)) > 0)
2278 processudp(buf
, n
, &addr
);
2283 if (FD_ISSET(tunfd
, &r
))
2286 for (c
= 0; c
< config
->multi_read_count
; c
++)
2288 if ((n
= read(tunfd
, buf
, sizeof(buf
))) > 0)
2294 for (i
= 0; i
< config
->num_radfds
; i
++)
2295 if (FD_ISSET(radfds
[i
], &r
))
2296 processrad(buf
, recv(radfds
[i
], buf
, sizeof(buf
), 0), i
);
2297 if (FD_ISSET(cluster_sockfd
, &r
)) {
2299 size
= recvfrom(cluster_sockfd
, buf
, sizeof(buf
), MSG_WAITALL
, (void *) &addr
, &alen
);
2300 processcluster(buf
, size
, addr
.sin_addr
.s_addr
);
2302 if (FD_ISSET(controlfd
, &r
))
2303 processcontrol(buf
, recvfrom(controlfd
, buf
, sizeof(buf
), MSG_WAITALL
, (void *) &addr
, &alen
), &addr
);
2304 if (FD_ISSET(clifd
, &r
))
2306 struct sockaddr_in addr
;
2308 int len
= sizeof(addr
);
2310 if ((sockfd
= accept(clifd
, (struct sockaddr
*)&addr
, &len
)) <= 0)
2312 log(0, 0, 0, 0, "accept error: %s\n", strerror(errno
));
2323 // Runs on every machine (master and slaves).
2324 if (cluster_sockfd
&& next_cluster_ping
<= TIME
)
2326 // Check to see which of the cluster is still alive..
2328 cluster_send_ping(basetime
); // Only does anything if we're a slave
2329 cluster_check_master(); // ditto.
2331 cluster_heartbeat(); // Only does anything if we're a master.
2332 cluster_check_slaves(); // ditto.
2334 master_update_counts(); // If we're a slave, send our byte counters to our master.
2336 if (config
->cluster_iam_master
&& !config
->cluster_iam_uptodate
)
2337 next_cluster_ping
= TIME
+ 1; // out-of-date slaves, do fast updates
2339 next_cluster_ping
= TIME
+ config
->cluster_hb_interval
;
2342 // Run token bucket filtering queue..
2343 // Only run it every 1/10th of a second.
2344 // Runs on all machines both master and slave.
2346 static clockt last_run
= 0;
2347 if (last_run
!= TIME
) {
2353 /* Handle timeouts. Make sure that this gets run anyway, even if there was
2354 * something to read, else under load this will never actually run....
2357 if (config
->cluster_iam_master
&& next_clean
<= time_now
) {
2358 if (regular_cleanups()) { // Did it finish?
2359 next_clean
= time_now
+ 1 ; // Didn't finish. Check quickly.
2361 next_clean
= time_now
+ config
->cleanup_interval
; // Did. Move to next interval.
2366 for (i
= 0; i
< BGP_NUM_PEERS
; i
++)
2368 bgp_process(&bgp_peers
[i
],
2369 bgp_set
[i
] ? FD_ISSET(bgp_peers
[i
].sock
, &r
) : 0,
2370 bgp_set
[i
] ? FD_ISSET(bgp_peers
[i
].sock
, &w
) : 0);
2375 // Are we the master and shutting down??
2376 if (config
->cluster_iam_master
)
2377 cluster_heartbeat(); // Flush any queued changes..
2379 // Ok. Notify everyone we're shutting down. If we're
2380 // the master, this will force an election.
2381 cluster_send_ping(0);
2384 // Important!!! We MUST not process any packets past this point!
2387 // Init data structures
2392 _statistics
= mmap(NULL
, sizeof(struct Tstats
), PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2393 if (_statistics
== MAP_FAILED
)
2395 log(0, 0, 0, 0, "Error doing mmap for _statistics: %s\n", strerror(errno
));
2398 config
= mmap(NULL
, sizeof(struct configt
), PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2399 if (config
== MAP_FAILED
)
2401 log(0, 0, 0, 0, "Error doing mmap for configuration: %s\n", strerror(errno
));
2404 memset(config
, 0, sizeof(struct configt
));
2405 time(&config
->start_time
);
2406 strncpy(config
->config_file
, CONFIGFILE
, sizeof(config
->config_file
) - 1);
2407 tunnel
= mmap(NULL
, sizeof(tunnelt
) * MAXTUNNEL
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2408 if (tunnel
== MAP_FAILED
)
2410 log(0, 0, 0, 0, "Error doing mmap for tunnels: %s\n", strerror(errno
));
2413 session
= mmap(NULL
, sizeof(sessiont
) * MAXSESSION
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2414 if (session
== MAP_FAILED
)
2416 log(0, 0, 0, 0, "Error doing mmap for sessions: %s\n", strerror(errno
));
2420 sess_count
= mmap(NULL
, sizeof(sessioncountt
) * MAXSESSION
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2421 if (sess_count
== MAP_FAILED
)
2423 log(0, 0, 0, 0, "Error doing mmap for sessions_count: %s\n", strerror(errno
));
2427 radius
= mmap(NULL
, sizeof(radiust
) * MAXRADIUS
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2428 if (radius
== MAP_FAILED
)
2430 log(0, 0, 0, 0, "Error doing mmap for radius: %s\n", strerror(errno
));
2433 ip_address_pool
= mmap(NULL
, sizeof(ippoolt
) * MAXIPPOOL
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2434 if (ip_address_pool
== MAP_FAILED
)
2436 log(0, 0, 0, 0, "Error doing mmap for ip_address_pool: %s\n", strerror(errno
));
2440 ringbuffer
= mmap(NULL
, sizeof(struct Tringbuffer
), PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2441 if (ringbuffer
== MAP_FAILED
)
2443 log(0, 0, 0, 0, "Error doing mmap for ringbuffer: %s\n", strerror(errno
));
2446 memset(ringbuffer
, 0, sizeof(struct Tringbuffer
));
2449 cli_session_actions
= mmap(NULL
, sizeof(struct cli_session_actions
) * MAXSESSION
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2450 if (cli_session_actions
== MAP_FAILED
)
2452 log(0, 0, 0, 0, "Error doing mmap for cli session actions: %s\n", strerror(errno
));
2455 memset(cli_session_actions
, 0, sizeof(struct cli_session_actions
) * MAXSESSION
);
2456 cli_tunnel_actions
= mmap(NULL
, sizeof(struct cli_tunnel_actions
) * MAXSESSION
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2457 if (cli_tunnel_actions
== MAP_FAILED
)
2459 log(0, 0, 0, 0, "Error doing mmap for cli tunnel actions: %s\n", strerror(errno
));
2462 memset(cli_tunnel_actions
, 0, sizeof(struct cli_tunnel_actions
) * MAXSESSION
);
2464 memset(tunnel
, 0, sizeof(tunnelt
) * MAXTUNNEL
);
2465 memset(session
, 0, sizeof(sessiont
) * MAXSESSION
);
2466 memset(radius
, 0, sizeof(radiust
) * MAXRADIUS
);
2467 memset(ip_address_pool
, 0, sizeof(ippoolt
) * MAXIPPOOL
);
2469 // Put all the sessions on the free list marked as undefined.
2470 for (i
= 1; i
< MAXSESSION
- 1; i
++) {
2471 session
[i
].next
= i
+ 1;
2472 session
[i
].tunnel
= T_UNDEF
; // mark it as not filled in.
2474 session
[MAXSESSION
- 1].next
= 0;
2477 // Mark all the tunnels as undefined (waiting to be filled in by a download).
2478 for (i
= 1; i
< MAXTUNNEL
- 1; i
++) {
2479 tunnel
[i
].state
= TUNNELUNDEF
; // mark it as not filled in.
2485 // Grab my hostname unless it's been specified
2486 gethostname(hostname
, sizeof(hostname
));
2487 if ((p
= strchr(hostname
, '.'))) *p
= 0;
2489 _statistics
->start_time
= _statistics
->last_reset
= time(NULL
);
2492 bgp_peers
= mmap(NULL
, sizeof(struct bgp_peer
) * BGP_NUM_PEERS
, PROT_READ
| PROT_WRITE
, MAP_SHARED
| MAP_ANONYMOUS
, 0, 0);
2493 if (bgp_peers
== MAP_FAILED
)
2495 log(0, 0, 0, 0, "Error doing mmap for bgp: %s\n", strerror(errno
));
2501 void initiptables(void)
2503 /* Flush the tables here so that we have a clean slate */
2505 // Not needed. 'nat' is setup by garden.c
2506 // mangle isn't used (as throttling is done by tbf inhouse).
2509 int assign_ip_address(sessionidt s
)
2513 time_t best_time
= time_now
;
2514 char *u
= session
[s
].user
;
2518 CSTAT(call_assign_ip_address
);
2520 for (i
= 1; i
< ip_pool_size
; i
++)
2522 if (!ip_address_pool
[i
].address
|| ip_address_pool
[i
].assigned
)
2525 if (!session
[s
].walled_garden
&& ip_address_pool
[i
].user
[0] && !strcmp(u
, ip_address_pool
[i
].user
))
2532 if (ip_address_pool
[i
].last
< best_time
)
2535 if (!(best_time
= ip_address_pool
[i
].last
))
2536 break; // never used, grab this one
2542 log(0, 0, s
, session
[s
].tunnel
, "assign_ip_address(): out of addresses\n");
2546 session
[s
].ip
= ip_address_pool
[best
].address
;
2547 session
[s
].ip_pool_index
= best
;
2548 ip_address_pool
[best
].assigned
= 1;
2549 ip_address_pool
[best
].last
= time_now
;
2550 ip_address_pool
[best
].session
= s
;
2551 if (session
[s
].walled_garden
)
2552 /* Don't track addresses of users in walled garden (note: this
2553 means that their address isn't "sticky" even if they get
2555 ip_address_pool
[best
].user
[0] = 0;
2557 strncpy(ip_address_pool
[best
].user
, u
, sizeof(ip_address_pool
[best
].user
) - 1);
2560 log(4, ip_address_pool
[best
].address
, s
, session
[s
].tunnel
,
2561 "assign_ip_address(): %s ip address %d from pool\n", reuse
? "Reusing" : "Allocating", best
);
2566 void free_ip_address(sessionidt s
)
2568 int i
= session
[s
].ip_pool_index
;
2571 return; // what the?
2573 if (i
< 0) // Is this actually part of the ip pool?
2577 cache_ipmap(session
[s
].ip
, -i
); // Change the mapping to point back to the ip pool index.
2579 ip_address_pool
[i
].assigned
= 0;
2580 ip_address_pool
[i
].session
= 0;
2581 ip_address_pool
[i
].last
= time_now
;
2584 CSTAT(call_free_ip_address
);
2589 // Fsck the address pool against the session table.
2590 // Normally only called when we become a master.
2592 // This isn't perfect: We aren't keep tracking of which
2593 // users used to have an IP address.
2595 void rebuild_address_pool(void)
2600 // Zero the IP pool allocation, and build
2601 // a map from IP address to pool index.
2602 for (i
= 1; i
< MAXIPPOOL
; ++i
) {
2603 ip_address_pool
[i
].assigned
= 0;
2604 ip_address_pool
[i
].session
= 0;
2605 if (!ip_address_pool
[i
].address
)
2608 cache_ipmap(ip_address_pool
[i
].address
, -i
); // Map pool IP to pool index.
2611 for (i
= 0; i
< MAXSESSION
; ++i
) {
2613 if (!session
[i
].ip
|| !session
[i
].tunnel
)
2615 ipid
= - lookup_ipmap(htonl(session
[i
].ip
));
2617 if (session
[i
].ip_pool_index
< 0) { // Not allocated out of the pool.
2618 if (ipid
< 1) // Not found in the pool either? good.
2621 log(0, 0, i
, 0, "Session %d has an IP address (%s) that was marked static, but is in the pool (%d)!\n",
2622 i
, inet_toa(session
[i
].ip
), ipid
);
2624 // Fall through and process it as part of the pool.
2628 if (ipid
> MAXIPPOOL
|| ipid
< 0) {
2629 log(0, 0, i
, 0, "Session %d has a pool IP that's not found in the pool! (%d)\n", i
, ipid
);
2631 session
[i
].ip_pool_index
= ipid
;
2635 ip_address_pool
[ipid
].assigned
= 1;
2636 ip_address_pool
[ipid
].session
= i
;
2637 ip_address_pool
[ipid
].last
= time_now
;
2638 strncpy(ip_address_pool
[ipid
].user
, session
[i
].user
, sizeof(ip_address_pool
[ipid
].user
) - 1);
2639 session
[i
].ip_pool_index
= ipid
;
2640 cache_ipmap(session
[i
].ip
, i
); // Fix the ip map.
2645 // Fix the address pool to match a changed session.
2646 // (usually when the master sends us an update).
2647 void fix_address_pool(int sid
)
2651 ipid
= session
[sid
].ip_pool_index
;
2653 if (ipid
> ip_pool_size
)
2654 return; // Ignore it. rebuild_address_pool will fix it up.
2656 if (ip_address_pool
[ipid
].address
!= session
[sid
].ip
)
2657 return; // Just ignore it. rebuild_address_pool will take care of it.
2659 ip_address_pool
[ipid
].assigned
= 1;
2660 ip_address_pool
[ipid
].session
= sid
;
2661 ip_address_pool
[ipid
].last
= time_now
;
2662 strncpy(ip_address_pool
[ipid
].user
, session
[sid
].user
, sizeof(ip_address_pool
[ipid
].user
) - 1);
2666 // Add a block of addresses to the IP pool to hand out.
2668 void add_to_ip_pool(u32 addr
, u32 mask
)
2672 mask
= 0xffffffff; // Host route only.
2676 if (ip_pool_size
>= MAXIPPOOL
) // Pool is full!
2679 for (i
= addr
;(i
& mask
) == addr
; ++i
)
2681 if ((i
& 0xff) == 0 || (i
&0xff) == 255)
2682 continue; // Skip 0 and broadcast addresses.
2684 ip_address_pool
[ip_pool_size
].address
= i
;
2685 ip_address_pool
[ip_pool_size
].assigned
= 0;
2687 if (ip_pool_size
>= MAXIPPOOL
)
2689 log(0,0,0,0, "Overflowed IP pool adding %s\n", inet_toa(htonl(addr
)) );
2695 // Initialize the IP address pool
2701 memset(ip_address_pool
, 0, sizeof(ip_address_pool
));
2703 if (!(f
= fopen(IPPOOLFILE
, "r")))
2705 log(0, 0, 0, 0, "Can't load pool file " IPPOOLFILE
": %s\n", strerror(errno
));
2709 while (ip_pool_size
< MAXIPPOOL
&& fgets(buf
, 4096, f
))
2712 buf
[4095] = 0; // Force it to be zero terminated/
2714 if (*buf
== '#' || *buf
== '\n')
2715 continue; // Skip comments / blank lines
2716 if ((p
= (char *)strrchr(buf
, '\n'))) *p
= 0;
2717 if ((p
= (char *)strchr(buf
, ':')))
2721 src
= inet_addr(buf
);
2722 if (src
== INADDR_NONE
)
2724 log(0, 0, 0, 0, "Invalid address pool IP %s\n", buf
);
2727 // This entry is for a specific IP only
2728 if (src
!= config
->bind_address
)
2733 if ((p
= (char *)strchr(pool
, '/')))
2737 u32 start
= 0, mask
= 0;
2739 log(2, 0, 0, 0, "Adding IP address range %s\n", buf
);
2741 if (!*p
|| !(numbits
= atoi(p
)))
2743 log(0, 0, 0, 0, "Invalid pool range %s\n", buf
);
2746 start
= ntohl(inet_addr(pool
));
2747 mask
= (u32
)(pow(2, numbits
) - 1) << (32 - numbits
);
2749 // Add a static route for this pool
2750 log(5, 0, 0, 0, "Adding route for address pool %s/%u\n", inet_toa(htonl(start
)), 32 + mask
);
2751 routeset(0, start
, mask
, 0, 1);
2753 add_to_ip_pool(start
, mask
);
2757 // It's a single ip address
2758 add_to_ip_pool(inet_addr(pool
), 0);
2762 log(1, 0, 0, 0, "IP address pool is %d addresses\n", ip_pool_size
- 1);
2765 void snoop_send_packet(char *packet
, u16 size
, ipt destination
, u16 port
)
2767 struct sockaddr_in snoop_addr
= {0};
2768 if (!destination
|| !port
|| snoopfd
<= 0 || size
<= 0 || !packet
)
2771 snoop_addr
.sin_family
= AF_INET
;
2772 snoop_addr
.sin_addr
.s_addr
= destination
;
2773 snoop_addr
.sin_port
= ntohs(port
);
2775 log(5, 0, 0, 0, "Snooping packet at %p (%d bytes) to %s:%d\n",
2776 packet
, size
, inet_toa(snoop_addr
.sin_addr
.s_addr
), htons(snoop_addr
.sin_port
));
2777 if (sendto(snoopfd
, packet
, size
, MSG_DONTWAIT
| MSG_NOSIGNAL
, (void *) &snoop_addr
, sizeof(snoop_addr
)) < 0)
2778 log(0, 0, 0, 0, "Error sending intercept packet: %s\n", strerror(errno
));
2779 STAT(packets_snooped
);
2782 void dump_acct_info()
2784 char filename
[1024];
2786 time_t t
= time(NULL
);
2791 CSTAT(call_dump_acct_info
);
2793 strftime(timestr
, 64, "%Y%m%d%H%M%S", localtime(&t
));
2794 snprintf(filename
, 1024, "%s/%s", config
->accounting_dir
, timestr
);
2796 for (i
= 0; i
< MAXSESSION
; i
++)
2798 if (!session
[i
].opened
|| !session
[i
].ip
|| !session
[i
].cin
|| !session
[i
].cout
|| !*session
[i
].user
|| session
[i
].walled_garden
)
2802 time_t now
= time(NULL
);
2803 if (!(f
= fopen(filename
, "w")))
2805 log(0, 0, 0, 0, "Can't write accounting info to %s: %s\n", filename
, strerror(errno
));
2808 log(3, 0, 0, 0, "Dumping accounting information to %s\n", filename
);
2809 fprintf(f
, "# dslwatch.pl dump file V1.01\n"
2813 "# format: username ip qos uptxoctets downrxoctets\n",
2819 log(4, 0, 0, 0, "Dumping accounting information for %s\n", session
[i
].user
);
2820 fprintf(f
, "%s %s %d %u %u\n",
2821 session
[i
].user
, // username
2822 inet_toa(htonl(session
[i
].ip
)), // ip
2823 (session
[i
].throttle
) ? 2 : 1, // qos
2824 (u32
)session
[i
].cin
, // uptxoctets
2825 (u32
)session
[i
].cout
); // downrxoctets
2827 session
[i
].pin
= session
[i
].cin
= 0;
2828 session
[i
].pout
= session
[i
].cout
= 0;
2835 int main(int argc
, char *argv
[])
2839 _program_name
= strdup(argv
[0]);
2841 time(&basetime
); // start clock
2844 while ((o
= getopt(argc
, argv
, "vc:h:a:")) >= 0)
2849 // Double fork to detach from terminal
2850 if (fork()) exit(0);
2851 if (fork()) exit(0);
2857 snprintf(hostname
, sizeof(hostname
), "%s", optarg
);
2861 printf("Args are:\n"
2862 "\t-d\tDetach from terminal\n"
2863 "\t-c <file>\tConfig file\n"
2864 "\t-h <hostname>\tForce hostname\n"
2865 "\t-a <address>\tUse specific address\n"
2873 // Start the timer routine off
2875 strftime(time_now_string
, sizeof(time_now_string
), "%Y-%m-%d %H:%M:%S", localtime(&time_now
));
2876 signal(SIGALRM
, sigalrm_handler
);
2877 siginterrupt(SIGALRM
, 0);
2886 log(0, 0, 0, 0, "L2TPNS version " VERSION
"\n");
2887 log(0, 0, 0, 0, "Copyright (c) 2003, 2004 Optus Internet Engineering\n");
2888 log(0, 0, 0, 0, "Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced\n");
2891 rlim
.rlim_cur
= RLIM_INFINITY
;
2892 rlim
.rlim_max
= RLIM_INFINITY
;
2893 // Remove the maximum core size
2894 if (setrlimit(RLIMIT_CORE
, &rlim
) < 0)
2895 log(0, 0, 0, 0, "Can't set ulimit: %s\n", strerror(errno
));
2896 // Make core dumps go to /tmp
2900 if (config
->scheduler_fifo
)
2903 struct sched_param params
= {0};
2904 params
.sched_priority
= 1;
2906 if (get_nprocs() < 2)
2908 log(0, 0, 0, 0, "Not using FIFO scheduler, there is only 1 processor in the system.\n");
2909 config
->scheduler_fifo
= 0;
2913 if ((ret
= sched_setscheduler(0, SCHED_FIFO
, ¶ms
)) == 0)
2915 log(1, 0, 0, 0, "Using FIFO scheduler. Say goodbye to any other processes running\n");
2919 log(0, 0, 0, 0, "Error setting scheduler to FIFO: %s\n", strerror(errno
));
2920 config
->scheduler_fifo
= 0;
2925 /* Set up the cluster communications port. */
2926 if (cluster_init(config
->bind_address
) < 0)
2930 signal(SIGPIPE
, SIG_IGN
);
2931 bgp_setup(config
->as_number
);
2932 bgp_add_route(config
->bind_address
, 0xffffffff);
2933 if (*config
->bgp_peer
[0])
2934 bgp_start(&bgp_peers
[0], config
->bgp_peer
[0],
2935 config
->bgp_peer_as
[0], 0); /* 0 = routing disabled */
2937 if (*config
->bgp_peer
[1])
2938 bgp_start(&bgp_peers
[1], config
->bgp_peer
[1],
2939 config
->bgp_peer_as
[1], 0);
2943 log(1, 0, 0, 0, "Set up on interface %s\n", config
->tundevice
);
2951 signal(SIGHUP
, sighup_handler
);
2952 signal(SIGTERM
, sigterm_handler
);
2953 signal(SIGINT
, sigterm_handler
);
2954 signal(SIGQUIT
, sigquit_handler
);
2955 signal(SIGCHLD
, sigchild_handler
);
2959 // Drop privileges here
2960 if (config
->target_uid
> 0 && geteuid() == 0)
2961 setuid(config
->target_uid
);
2966 /* try to shut BGP down cleanly; with luck the sockets will be
2967 writable since we're out of the select */
2970 for (i
= 0; i
< BGP_NUM_PEERS
; i
++)
2971 if (bgp_peers
[i
].state
== Established
)
2972 bgp_stop(&bgp_peers
[i
]);
2976 /* remove plugins (so cleanup code gets run) */
2979 /* kill CLI children */
2980 signal(SIGTERM
, SIG_IGN
);
2985 void sighup_handler(int junk
)
2987 if (log_stream
&& log_stream
!= stderr
)
2996 void sigalrm_handler(int junk
)
2998 // Log current traffic stats
3000 snprintf(config
->bandwidth
, sizeof(config
->bandwidth
),
3001 "UDP-ETH:%1.0f/%1.0f ETH-UDP:%1.0f/%1.0f TOTAL:%0.1f IN:%u OUT:%u",
3002 (udp_rx
/ 1024.0 / 1024.0 * 8),
3003 (eth_tx
/ 1024.0 / 1024.0 * 8),
3004 (eth_rx
/ 1024.0 / 1024.0 * 8),
3005 (udp_tx
/ 1024.0 / 1024.0 * 8),
3006 ((udp_tx
+ udp_rx
+ eth_tx
+ eth_rx
) / 1024.0 / 1024.0 * 8),
3007 udp_rx_pkt
, eth_rx_pkt
);
3009 udp_tx
= udp_rx
= 0;
3010 udp_rx_pkt
= eth_rx_pkt
= 0;
3011 eth_tx
= eth_rx
= 0;
3013 if (config
->dump_speed
)
3014 printf("%s\n", config
->bandwidth
);
3016 // Update the internal time counter
3018 strftime(time_now_string
, sizeof(time_now_string
), "%Y-%m-%d %H:%M:%S", localtime(&time_now
));
3023 struct param_timer p
= { time_now
};
3024 run_plugins(PLUGIN_TIMER
, &p
);
3029 void sigterm_handler(int junk
)
3031 log(1, 0, 0, 0, "Shutting down cleanly\n");
3032 if (config
->save_state
)
3038 void sigquit_handler(int junk
)
3042 log(1, 0, 0, 0, "Shutting down without saving sessions\n");
3043 for (i
= 1; i
< MAXSESSION
; i
++)
3045 if (session
[i
].opened
)
3046 sessionkill(i
, "L2TPNS Closing");
3048 for (i
= 1; i
< MAXTUNNEL
; i
++)
3050 if (tunnel
[i
].ip
|| tunnel
[i
].state
)
3051 tunnelshutdown(i
, "L2TPNS Closing");
3057 void sigchild_handler(int signal
)
3059 while (waitpid(-1, NULL
, WNOHANG
) > 0)
3069 char magic
[sizeof(DUMP_MAGIC
)-1];
3072 if (!config
->save_state
)
3078 if (stat(STATEFILE
, &sb
) < 0)
3084 if (sb
.st_mtime
< (time(NULL
) - 60))
3086 log(0, 0, 0, 0, "State file is too old to read, ignoring\n");
3091 f
= fopen(STATEFILE
, "r");
3096 log(0, 0, 0, 0, "Can't read state file: %s\n", strerror(errno
));
3100 if (fread(magic
, sizeof(magic
), 1, f
) != 1 || strncmp(magic
, DUMP_MAGIC
, sizeof(magic
)))
3102 log(0, 0, 0, 0, "Bad state file magic\n");
3106 log(1, 0, 0, 0, "Reading state information\n");
3107 if (fread(buf
, sizeof(buf
), 1, f
) != 1 || buf
[0] > MAXIPPOOL
|| buf
[1] != sizeof(ippoolt
))
3109 log(0, 0, 0, 0, "Error/mismatch reading ip pool header from state file\n");
3113 if (buf
[0] > ip_pool_size
)
3115 log(0, 0, 0, 0, "ip pool has shrunk! state = %d, current = %d\n", buf
[0], ip_pool_size
);
3119 log(2, 0, 0, 0, "Loading %u ip addresses\n", buf
[0]);
3120 for (i
= 0; i
< buf
[0]; i
++)
3122 if (fread(&itmp
, sizeof(itmp
), 1, f
) != 1)
3124 log(0, 0, 0, 0, "Error reading ip %d from state file: %s\n", i
, strerror(errno
));
3128 if (itmp
.address
!= ip_address_pool
[i
].address
)
3130 log(0, 0, 0, 0, "Mismatched ip %d from state file: pool may only be extended\n", i
);
3134 memcpy(&ip_address_pool
[i
], &itmp
, sizeof(itmp
));
3137 if (fread(buf
, sizeof(buf
), 1, f
) != 1 || buf
[0] != MAXTUNNEL
|| buf
[1] != sizeof(tunnelt
))
3139 log(0, 0, 0, 0, "Error/mismatch reading tunnel header from state file\n");
3143 log(2, 0, 0, 0, "Loading %u tunnels\n", MAXTUNNEL
);
3144 if (fread(tunnel
, sizeof(tunnelt
), MAXTUNNEL
, f
) != MAXTUNNEL
)
3146 log(0, 0, 0, 0, "Error reading tunnel data from state file\n");
3150 for (i
= 0; i
< MAXTUNNEL
; i
++)
3152 tunnel
[i
].controlc
= 0;
3153 tunnel
[i
].controls
= NULL
;
3154 tunnel
[i
].controle
= NULL
;
3155 if (*tunnel
[i
].hostname
)
3156 log(3, 0, 0, 0, "Created tunnel for %s\n", tunnel
[i
].hostname
);
3159 if (fread(buf
, sizeof(buf
), 1, f
) != 1 || buf
[0] != MAXSESSION
|| buf
[1] != sizeof(sessiont
))
3161 log(0, 0, 0, 0, "Error/mismatch reading session header from state file\n");
3165 log(2, 0, 0, 0, "Loading %u sessions\n", MAXSESSION
);
3166 if (fread(session
, sizeof(sessiont
), MAXSESSION
, f
) != MAXSESSION
)
3168 log(0, 0, 0, 0, "Error reading session data from state file\n");
3172 for (i
= 0; i
< MAXSESSION
; i
++)
3174 session
[i
].tbf_in
= 0;
3175 session
[i
].tbf_out
= 0;
3176 if (session
[i
].opened
)
3178 log(2, 0, i
, 0, "Loaded active session for user %s\n", session
[i
].user
);
3180 sessionsetup(session
[i
].tunnel
, i
);
3185 log(0, 0, 0, 0, "Loaded saved state information\n");
3193 if (!config
->save_state
)
3197 if (!(f
= fopen(STATEFILE
, "w")))
3200 log(1, 0, 0, 0, "Dumping state information\n");
3202 if (fwrite(DUMP_MAGIC
, sizeof(DUMP_MAGIC
)-1, 1, f
) != 1) break;
3204 log(2, 0, 0, 0, "Dumping %u ip addresses\n", ip_pool_size
);
3205 buf
[0] = ip_pool_size
;
3206 buf
[1] = sizeof(ippoolt
);
3207 if (fwrite(buf
, sizeof(buf
), 1, f
) != 1) break;
3208 if (fwrite(ip_address_pool
, sizeof(ippoolt
), ip_pool_size
, f
) != ip_pool_size
) break;
3210 log(2, 0, 0, 0, "Dumping %u tunnels\n", MAXTUNNEL
);
3212 buf
[1] = sizeof(tunnelt
);
3213 if (fwrite(buf
, sizeof(buf
), 1, f
) != 1) break;
3214 if (fwrite(tunnel
, sizeof(tunnelt
), MAXTUNNEL
, f
) != MAXTUNNEL
) break;
3216 log(2, 0, 0, 0, "Dumping %u sessions\n", MAXSESSION
);
3217 buf
[0] = MAXSESSION
;
3218 buf
[1] = sizeof(sessiont
);
3219 if (fwrite(buf
, sizeof(buf
), 1, f
) != 1) break;
3220 if (fwrite(session
, sizeof(sessiont
), MAXSESSION
, f
) != MAXSESSION
) break;
3222 if (fclose(f
) == 0) return; // OK
3225 log(0, 0, 0, 0, "Can't write state information: %s\n", strerror(errno
));
3229 void build_chap_response(char *challenge
, u8 id
, u16 challenge_length
, char **challenge_response
)
3232 *challenge_response
= NULL
;
3234 if (!*config
->l2tpsecret
)
3236 log(0, 0, 0, 0, "LNS requested CHAP authentication, but no l2tp secret is defined\n");
3240 log(4, 0, 0, 0, " Building challenge response for CHAP request\n");
3242 *challenge_response
= (char *)calloc(17, 1);
3245 MD5Update(&ctx
, &id
, 1);
3246 MD5Update(&ctx
, config
->l2tpsecret
, strlen(config
->l2tpsecret
));
3247 MD5Update(&ctx
, challenge
, challenge_length
);
3248 MD5Final(*challenge_response
, &ctx
);
3253 static int facility_value(char *name
)
3256 for (i
= 0; facilitynames
[i
].c_name
; i
++)
3258 if (strcmp(facilitynames
[i
].c_name
, name
) == 0)
3259 return facilitynames
[i
].c_val
;
3264 void update_config()
3267 static int timeout
= 0;
3268 static int interval
= 0;
3278 if (*config
->log_filename
)
3280 if (strstr(config
->log_filename
, "syslog:") == config
->log_filename
)
3282 char *p
= config
->log_filename
+ 7;
3285 openlog("l2tpns", LOG_PID
, facility_value(p
));
3289 else if (strchr(config
->log_filename
, '/') == config
->log_filename
)
3291 if ((log_stream
= fopen((char *)(config
->log_filename
), "a")))
3293 fseek(log_stream
, 0, SEEK_END
);
3294 setbuf(log_stream
, NULL
);
3298 log_stream
= stderr
;
3299 setbuf(log_stream
, NULL
);
3305 log_stream
= stderr
;
3306 setbuf(log_stream
, NULL
);
3311 config
->numradiusservers
= 0;
3312 for (i
= 0; i
< MAXRADSERVER
; i
++)
3313 if (config
->radiusserver
[i
]) config
->numradiusservers
++;
3315 if (!config
->numradiusservers
)
3317 log(0, 0, 0, 0, "No RADIUS servers defined!\n");
3320 config
->num_radfds
= 2 << RADIUS_SHIFT
;
3323 for (i
= 0; i
< MAXPLUGINS
; i
++)
3325 if (strcmp(config
->plugins
[i
], config
->old_plugins
[i
]) == 0)
3327 if (*config
->plugins
[i
])
3330 add_plugin(config
->plugins
[i
]);
3332 else if (*config
->old_plugins
[i
])
3335 remove_plugin(config
->old_plugins
[i
]);
3338 memcpy(config
->old_plugins
, config
->plugins
, sizeof(config
->plugins
));
3339 if (!config
->cleanup_interval
) config
->cleanup_interval
= 10;
3340 if (!config
->multi_read_count
) config
->multi_read_count
= 10;
3341 if (!config
->cluster_address
) config
->cluster_address
= inet_addr(DEFAULT_MCAST_ADDR
);
3342 if (!*config
->cluster_interface
)
3343 strncpy(config
->cluster_interface
, DEFAULT_MCAST_INTERFACE
, sizeof(config
->cluster_interface
) - 1);
3345 if (!config
->cluster_hb_interval
)
3346 config
->cluster_hb_interval
= PING_INTERVAL
; // Heartbeat every 0.5 seconds.
3348 if (!config
->cluster_hb_timeout
)
3349 config
->cluster_hb_timeout
= HB_TIMEOUT
; // 10 missed heartbeat triggers an election.
3351 if (interval
!= config
->cluster_hb_interval
|| timeout
!= config
->cluster_hb_timeout
)
3353 // Paranoia: cluster_check_master() treats 2 x interval + 1 sec as
3354 // late, ensure we're sufficiently larger than that
3355 int t
= 4 * config
->cluster_hb_interval
+ 11;
3357 if (config
->cluster_hb_timeout
< t
)
3359 log(0,0,0,0, "Heartbeat timeout %d too low, adjusting to %d\n", config
->cluster_hb_timeout
, t
);
3360 config
->cluster_hb_timeout
= t
;
3363 // Push timing changes to the slaves immediately if we're the master
3364 if (config
->cluster_iam_master
)
3365 cluster_heartbeat();
3367 interval
= config
->cluster_hb_interval
;
3368 timeout
= config
->cluster_hb_timeout
;
3371 config
->reload_config
= 0;
3374 void read_config_file()
3378 if (!config
->config_file
) return;
3379 if (!(f
= fopen(config
->config_file
, "r"))) {
3380 fprintf(stderr
, "Can't open config file %s: %s\n", config
->config_file
, strerror(errno
));
3384 log(3, 0, 0, 0, "Reading config file %s\n", config
->config_file
);
3386 log(3, 0, 0, 0, "Done reading config file\n");
3391 int sessionsetup(tunnelidt t
, sessionidt s
)
3393 // A session now exists, set it up
3399 CSTAT(call_sessionsetup
);
3402 log(3, session
[s
].ip
, s
, t
, "Doing session setup for session\n");
3404 if (!session
[s
].ip
|| session
[s
].ip
== 0xFFFFFFFE)
3406 assign_ip_address(s
);
3408 log(3, 0, s
, t
, " No IP allocated. Assigned %s from pool\n",
3409 inet_toa(htonl(session
[s
].ip
)));
3411 log(0, 0, s
, t
, " No IP allocated. The IP address pool is FULL!\n");
3415 // Make sure this is right
3416 session
[s
].tunnel
= t
;
3418 // zap old sessions with same IP and/or username
3419 // Don't kill gardened sessions - doing so leads to a DoS
3420 // from someone who doesn't need to know the password
3423 user
= session
[s
].user
;
3424 for (i
= 1; i
<= config
->cluster_highest_sessionid
; i
++)
3426 if (i
== s
) continue;
3427 if (ip
== session
[i
].ip
) sessionkill(i
, "Duplicate IP address");
3428 if (!session
[s
].walled_garden
&& !session
[i
].walled_garden
&& strcasecmp(user
, session
[i
].user
) == 0)
3429 sessionkill(i
, "Duplicate session for users");
3433 // Add the route for this session.
3435 // Static IPs need to be routed. Anything else
3436 // is part of the IP address pool and is already routed,
3437 // it just needs to be added to the IP cache.
3438 if (session
[s
].ip_pool_index
== -1) // static ip
3439 routeset(s
, session
[s
].ip
, 0, 0, 1);
3441 cache_ipmap(session
[s
].ip
, s
);
3443 for (r
= 0; r
< MAXROUTE
&& session
[s
].route
[r
].ip
; r
++)
3444 routeset(s
, session
[s
].route
[r
].ip
, session
[s
].route
[r
].mask
, session
[s
].ip
, 1);
3446 if (!session
[s
].sid
) { // did this session just finish radius?
3447 log(3, session
[s
].ip
, s
, t
, "Sending initial IPCP to client\n");
3449 session
[s
].sid
= ++last_sid
;
3452 // Run the plugin's against this new session.
3454 struct param_new_session data
= { &tunnel
[t
], &session
[s
] };
3455 run_plugins(PLUGIN_NEW_SESSION
, &data
);
3458 // Force throttling on or off (Actually : refresh the current throttling status)
3459 // This has the advantage of cleaning up after another throttled user who may have left
3460 // firewall rules lying around
3461 throttle_session(s
, session
[s
].throttle
);
3463 session
[s
].last_packet
= time_now
;
3466 char *sessionip
, *tunnelip
;
3467 sessionip
= strdup(inet_toa(htonl(session
[s
].ip
)));
3468 tunnelip
= strdup(inet_toa(htonl(tunnel
[t
].ip
)));
3469 log(2, session
[s
].ip
, s
, t
, "Login by %s at %s from %s (%s)\n",
3470 session
[s
].user
, sessionip
, tunnelip
, tunnel
[t
].hostname
);
3471 if (sessionip
) free(sessionip
);
3472 if (tunnelip
) free(tunnelip
);
3475 cluster_send_session(s
); // Mark it as dirty, and needing to the flooded to the cluster.
3477 return 1; // RADIUS OK and IP allocated, done...
3481 // This session just got dropped on us by the master or something.
3482 // Make sure our tables up up to date...
3484 int load_session(sessionidt s
, sessiont
*new)
3489 if (new->ip_pool_index
>= MAXIPPOOL
||
3490 new->tunnel
>= MAXTUNNEL
) {
3491 log(0,0,s
,0, "Strange session update received!\n");
3492 // FIXME! What to do here?
3497 // Ok. All sanity checks passed. Now we're committed to
3498 // loading the new session.
3501 session
[s
].tunnel
= new->tunnel
; // For logging in cache_ipmap
3504 if (new->ip
!= session
[s
].ip
) // Changed ip. fix up hash tables.
3506 if (session
[s
].ip
) // If there's an old one, remove it.
3508 // Remove any routes if the IP has changed
3509 for (i
= 0; i
< MAXROUTE
&& session
[s
].route
[i
].ip
; i
++)
3511 routeset(s
, session
[s
].route
[i
].ip
, session
[s
].route
[i
].mask
, session
[s
].ip
, 0);
3512 session
[s
].route
[i
].ip
= 0;
3515 if (session
[s
].ip_pool_index
== -1) // static IP
3516 routeset(s
, session
[s
].ip
, 0, 0, 0);
3517 else // It's part of the IP pool, remove it manually.
3518 uncache_ipmap(session
[s
].ip
);
3521 if (new->ip
) { // If there's a new one, add it.
3522 if (new->ip_pool_index
== -1)
3523 routeset(s
, new->ip
, 0, 0, 1);
3525 cache_ipmap(new->ip
, s
);
3529 // Update routed networks
3530 for (i
= 0; i
< MAXROUTE
&& (session
[s
].route
[i
].ip
|| new->route
[i
].ip
); i
++)
3532 if (new->route
[i
].ip
== session
[s
].route
[i
].ip
&&
3533 new->route
[i
].mask
== session
[s
].route
[i
].mask
)
3536 if (session
[s
].route
[i
].ip
) // Remove the old one if it exists.
3537 routeset(s
, session
[s
].route
[i
].ip
, session
[s
].route
[i
].mask
, session
[s
].ip
, 0);
3539 if (new->route
[i
].ip
) // Add the new one if it exists.
3540 routeset(s
, new->route
[i
].ip
, new->route
[i
].mask
, new->ip
, 1);
3543 if (new->tunnel
&& s
> config
->cluster_highest_sessionid
) // Maintain this in the slave. It's used
3544 // for walking the sessions to forward byte counts to the master.
3545 config
->cluster_highest_sessionid
= s
;
3547 memcpy(&session
[s
], new, sizeof(session
[s
])); // Copy over..
3549 // Do fixups into address pool.
3550 if (new->ip_pool_index
!= -1)
3551 fix_address_pool(s
);
3557 void ringbuffer_dump(FILE *stream
)
3559 int i
= ringbuffer
->head
;
3561 while (i
!= ringbuffer
->tail
)
3563 if (*ringbuffer
->buffer
[i
].message
)
3564 fprintf(stream
, "%d-%s", ringbuffer
->buffer
[i
].level
, ringbuffer
->buffer
[i
].message
);
3565 if (++i
== ringbuffer
->tail
) break;
3566 if (i
== RINGBUFFER_SIZE
) i
= 0;
3575 loaded_plugins
= ll_init();
3576 // Initialize the plugins to nothing
3577 for (i
= 0; i
< MAX_PLUGIN_TYPES
; i
++)
3578 plugins
[i
] = ll_init();
3581 static void *open_plugin(char *plugin_name
, int load
)
3583 char path
[256] = "";
3585 snprintf(path
, 256, PLUGINDIR
"/%s.so", plugin_name
);
3586 log(2, 0, 0, 0, "%soading plugin from %s\n", load
? "L" : "Un-l", path
);
3587 return dlopen(path
, RTLD_NOW
);
3590 void add_plugin(char *plugin_name
)
3592 static struct pluginfuncs funcs
= {
3597 sessiontbysessionidt
,
3598 sessionidtbysessiont
,
3604 void *p
= open_plugin(plugin_name
, 1);
3605 int (*initfunc
)(struct pluginfuncs
*);
3610 log(1, 0, 0, 0, " Plugin load failed: %s\n", dlerror());
3614 if (ll_contains(loaded_plugins
, p
))
3621 int *v
= dlsym(p
, "__plugin_api_version");
3622 if (!v
|| *v
!= PLUGIN_API_VERSION
)
3624 log(1, 0, 0, 0, " Plugin load failed: API version mismatch: %s\n", dlerror());
3630 if ((initfunc
= dlsym(p
, "plugin_init")))
3632 if (!initfunc(&funcs
))
3634 log(1, 0, 0, 0, " Plugin load failed: plugin_init() returned FALSE: %s\n", dlerror());
3640 ll_push(loaded_plugins
, p
);
3642 for (i
= 0; i
< max_plugin_functions
; i
++)
3645 if (plugin_functions
[i
] && (x
= dlsym(p
, plugin_functions
[i
])))
3647 log(3, 0, 0, 0, " Supports function \"%s\"\n", plugin_functions
[i
]);
3648 ll_push(plugins
[i
], x
);
3652 log(2, 0, 0, 0, " Loaded plugin %s\n", plugin_name
);
3655 static void run_plugin_done(void *plugin
)
3657 int (*donefunc
)(void) = dlsym(plugin
, "plugin_done");
3663 void remove_plugin(char *plugin_name
)
3665 void *p
= open_plugin(plugin_name
, 0);
3671 for (i
= 0; i
< max_plugin_functions
; i
++)
3674 if (plugin_functions
[i
] && (x
= dlsym(p
, plugin_functions
[i
])))
3675 ll_delete(plugins
[i
], x
);
3678 if (ll_contains(loaded_plugins
, p
))
3680 ll_delete(loaded_plugins
, p
);
3685 log(2, 0, 0, 0, "Removed plugin %s\n", plugin_name
);
3688 int run_plugins(int plugin_type
, void *data
)
3690 int (*func
)(void *data
);
3691 if (!plugins
[plugin_type
] || plugin_type
> max_plugin_functions
) return 1;
3693 ll_reset(plugins
[plugin_type
]);
3694 while ((func
= ll_next(plugins
[plugin_type
])))
3698 if (rc
== PLUGIN_RET_STOP
) return 1;
3699 if (rc
== PLUGIN_RET_ERROR
) return 0;
3708 ll_reset(loaded_plugins
);
3709 while ((p
= ll_next(loaded_plugins
)))
3713 void processcontrol(u8
* buf
, int len
, struct sockaddr_in
*addr
)
3717 struct param_control param
= { buf
, len
, ntohl(addr
->sin_addr
.s_addr
), ntohs(addr
->sin_port
), NULL
, 0, 0 };
3720 if (log_stream
&& config
->debug
>= 4)
3722 log(4, ntohl(addr
->sin_addr
.s_addr
), 0, 0, "Received ");
3723 dump_packet(buf
, log_stream
);
3726 resp
= calloc(1400, 1);
3727 l
= new_packet(PKT_RESP_ERROR
, resp
);
3728 *(int *)(resp
+ 6) = *(int *)(buf
+ 6);
3730 param
.type
= ntohs(*(short *)(buf
+ 2));
3731 param
.id
= ntohl(*(int *)(buf
+ 6));
3732 param
.data_length
= ntohs(*(short *)(buf
+ 4)) - 10;
3733 param
.data
= (param
.data_length
> 0) ? (char *)(buf
+ 10) : NULL
;
3734 param
.response
= resp
;
3735 param
.response_length
= l
;
3737 run_plugins(PLUGIN_CONTROL
, ¶m
);
3739 if (param
.send_response
)
3741 send_packet(controlfd
, ntohl(addr
->sin_addr
.s_addr
), ntohs(addr
->sin_port
), param
.response
, param
.response_length
);
3742 log(4, ntohl(addr
->sin_addr
.s_addr
), 0, 0, "Sent Control packet response\n");
3750 * Go through all of the tunnels and do some cleanups
3756 log(1, 0, 0, 0, "Cleaning tunnels array\n");
3758 for (i
= 1; i
< MAXTUNNEL
; i
++)
3761 || !*tunnel
[i
].hostname
3762 || (tunnel
[i
].state
== TUNNELDIE
&& tunnel
[i
].die
>= time_now
))
3769 void tunnelclear(tunnelidt t
)
3772 memset(&tunnel
[t
], 0, sizeof(tunnel
[t
]));
3773 tunnel
[t
].state
= TUNNELFREE
;
3776 tunnelidt
new_tunnel()
3779 for (i
= 1; i
< MAXTUNNEL
; i
++)
3781 if (tunnel
[i
].state
== TUNNELFREE
)
3783 log(4, 0, 0, i
, "Assigning tunnel ID %d\n", i
);
3784 if (i
> config
->cluster_highest_tunnelid
)
3785 config
->cluster_highest_tunnelid
= i
;
3789 log(0, 0, 0, 0, "Can't find a free tunnel! There shouldn't be this many in use!\n");
3794 // We're becoming the master. Do any required setup..
3796 // This is principally telling all the plugins that we're
3797 // now a master, and telling them about all the sessions
3798 // that are active too..
3800 void become_master(void)
3803 run_plugins(PLUGIN_BECOME_MASTER
, NULL
);
3805 for (s
= 1; s
<= config
->cluster_highest_sessionid
; ++s
) {
3806 if (!session
[s
].tunnel
) // Not an in-use session.
3809 run_plugins(PLUGIN_NEW_SESSION_MASTER
, &session
[s
]);
3815 int cmd_show_hist_idle(struct cli_def
*cli
, char *command
, char **argv
, int argc
)
3821 if (CLI_HELP_REQUESTED
)
3822 return CLI_HELP_NO_ARGS
;
3825 for (i
= 0; i
< 64;++i
) buckets
[i
] = 0;
3827 for (s
= 1; s
<= config
->cluster_highest_sessionid
; ++s
) {
3829 if (!session
[s
].tunnel
)
3832 idle
= time_now
- session
[s
].last_packet
;
3833 idle
/= 5 ; // In multiples of 5 seconds.
3843 for (i
= 0; i
< 63; ++i
) {
3844 cli_print(cli
, "%3d seconds : %7.2f%% (%6d)", i
* 5, (double) buckets
[i
] * 100.0 / count
, buckets
[i
]);
3846 cli_print(cli
, "lots of secs : %7.2f%% (%6d)", (double) buckets
[63] * 100.0 / count
, buckets
[i
]);
3847 cli_print(cli
, "%d total sessions open.", count
);
3851 int cmd_show_hist_open(struct cli_def
*cli
, char *command
, char **argv
, int argc
)
3857 if (CLI_HELP_REQUESTED
)
3858 return CLI_HELP_NO_ARGS
;
3861 for (i
= 0; i
< 64;++i
) buckets
[i
] = 0;
3863 for (s
= 1; s
<= config
->cluster_highest_sessionid
; ++s
) {
3865 if (!session
[s
].tunnel
)
3868 d
= time_now
- session
[s
].opened
;
3871 while (d
> 1 && open
< 32) {
3880 for (i
= 0; i
< 30; ++i
) {
3881 cli_print(cli
, " < %8d seconds : %7.2f%% (%6d)", s
, (double) buckets
[i
] * 100.0 / count
, buckets
[i
]);
3884 cli_print(cli
, "%d total sessions open.", count
);