235a2c8dded8dccc499a6a1aad7971ccf6f6a916
[l2tpns.git] / l2tpns.h
1 // L2TPNS Global Stuff
2 // $Id: l2tpns.h,v 1.78 2005/06/12 06:10:29 bodea Exp $
3
4 #ifndef __L2TPNS_H__
5 #define __L2TPNS_H__
6
7 #include <netinet/in.h>
8 #include <execinfo.h>
9 #include <stdio.h>
10 #include <signal.h>
11 #include <stdlib.h>
12 #include <netinet/in.h>
13 #include <sys/socket.h>
14 #include <arpa/inet.h>
15 #include <sys/types.h>
16 #include <libcli.h>
17
18 #define VERSION "2.1.1"
19
20 // Limits
21 #define MAXTUNNEL 500 // could be up to 65535
22 #define MAXSESSION 60000 // could be up to 65535
23 #define MAXTBFS 6000 // Maximum token bucket filters. Might need up to 2 * session.
24
25 #define RADIUS_SHIFT 6
26 #define RADIUS_FDS (1 << RADIUS_SHIFT)
27 #define RADIUS_MASK ((1 << RADIUS_SHIFT) - 1)
28 #define MAXRADIUS (1 << (8 + RADIUS_SHIFT))
29
30 #define T_UNDEF (0xffff) // A tunnel ID that won't ever be used. Mark session as undefined.
31 #define T_FREE (0) // A tunnel ID that won't ever be used. Mark session as free.
32
33 #define MAXCONTROL 1000 // max length control message we ever send...
34 #define MAXETHER (1500+18) // max packet we try sending to tun
35 #define MAXTEL 96 // telephone number
36 #define MAXUSER 128 // username
37 #define MAXPASS 128 // password
38 #define MAXPLUGINS 20 // maximum number of plugins to load
39 #define MAXRADSERVER 10 // max radius servers
40 #define MAXROUTE 10 // max static routes per session
41 #define MAXIPPOOL 131072 // max number of ip addresses in pool
42 #define RINGBUFFER_SIZE 10000 // Number of ringbuffer entries to allocate
43 #define MAX_LOG_LENGTH 512 // Maximum size of log message
44 #define ECHO_TIMEOUT 60 // Time between last packet sent and LCP ECHO generation
45 #define IDLE_TIMEOUT 240 // Time between last packet sent and LCP ECHO generation
46 #define BUSY_WAIT_TIME 3000 // 5 minutes in 1/10th seconds to wait for radius to cleanup on shutdown
47 #define DEFAULT_MRU 1452 // maximum packet size to avoid fragmentation when LNS ethernet MTU is 1500
48
49 // Constants
50 #ifndef ETCDIR
51 #define ETCDIR "/etc/l2tpns"
52 #endif
53
54 #ifndef LIBDIR
55 #define LIBDIR "/usr/lib/l2tpns"
56 #endif
57
58 #ifndef PLUGINDIR
59 #define PLUGINDIR LIBDIR // Plugins
60 #endif
61
62 #ifndef PLUGINCONF
63 #define PLUGINCONF ETCDIR // Plugin config dir
64 #endif
65
66 #ifndef FLASHDIR
67 #define FLASHDIR ETCDIR
68 #endif
69
70 #define TUNDEVICE "/dev/net/tun"
71 #define RANDOMDEVICE "/dev/urandom" // default, not as secure as /dev/random but non-blocking
72 #define CONFIGFILE FLASHDIR "/startup-config" // Configuration file
73 #define CLIUSERS FLASHDIR "/users" // CLI Users file
74 #define IPPOOLFILE FLASHDIR "/ip_pool" // Address pool configuration
75 #define ACCT_TIME 3000 // 5 minute accounting interval
76 #define ACCT_SHUT_TIME 600 // 1 minute for counters of shutdown sessions
77 #define L2TPPORT 1701 // L2TP port
78 #define RADPORT 1645 // old radius port...
79 #define PKTARP 0x0806 // ARP packet type
80 #define PKTIP 0x0800 // IPv4 packet type
81 #define PKTIPV6 0x86DD // IPv6 packet type
82 #define PPPPAP 0xC023
83 #define PPPCHAP 0xC223
84 #define PPPLCP 0xC021
85 #define PPPIPCP 0x8021
86 #define PPPIPV6CP 0x8057
87 #define PPPCCP 0x80FD
88 #define PPPIP 0x0021
89 #define PPPIPV6 0x0057
90 #define PPPMP 0x003D
91 #define MIN_IP_SIZE 0x19
92
93 enum {
94 ConfigReq = 1,
95 ConfigAck,
96 ConfigNak,
97 ConfigRej,
98 TerminateReq,
99 TerminateAck,
100 CodeRej,
101 ProtocolRej,
102 EchoReq,
103 EchoReply,
104 DiscardRequest,
105 IdentRequest
106 };
107
108 enum {
109 AccessRequest = 1,
110 AccessAccept,
111 AccessReject,
112 AccountingRequest,
113 AccountingResponse,
114 AccessChallenge = 11
115 };
116
117 // Types
118 typedef uint16_t sessionidt;
119 typedef uint16_t tunnelidt;
120 typedef uint32_t clockt;
121 typedef uint8_t hasht[16];
122
123 // CLI actions
124 struct cli_session_actions {
125 char action;
126 in_addr_t snoop_ip;
127 uint16_t snoop_port;
128 int throttle_in;
129 int throttle_out;
130 int filter_in;
131 int filter_out;
132 };
133
134 #define CLI_SESS_KILL 0x01
135 #define CLI_SESS_SNOOP 0x02
136 #define CLI_SESS_NOSNOOP 0x04
137 #define CLI_SESS_THROTTLE 0x08
138 #define CLI_SESS_NOTHROTTLE 0x10
139 #define CLI_SESS_FILTER 0x20
140 #define CLI_SESS_NOFILTER 0x40
141
142 struct cli_tunnel_actions {
143 char action;
144 };
145
146 #define CLI_TUN_KILL 0x01
147
148 // structures
149 typedef struct // route
150 {
151 in_addr_t ip;
152 in_addr_t mask;
153 }
154 routet;
155
156 typedef struct controls // control message
157 {
158 struct controls *next; // next in queue
159 uint16_t length; // length
160 uint8_t buf[MAXCONTROL];
161 }
162 controlt;
163
164 typedef struct
165 {
166 sessionidt next; // next session in linked list
167 sessionidt far; // far end session ID
168 tunnelidt tunnel; // near end tunnel ID
169 uint8_t l2tp_flags; // various bit flags from the ICCN on the l2tp tunnel.
170 uint8_t flags; // Various session flags.
171 in_addr_t ip; // IP of session set by RADIUS response (host byte order).
172 int ip_pool_index; // index to IP pool
173 uint32_t unique_id; // unique session id
174 uint16_t nr; // next receive
175 uint16_t ns; // next send
176 uint32_t magic; // ppp magic number
177 uint32_t pin, pout; // packet counts
178 uint32_t cin, cout; // byte counts
179 uint32_t cin_wrap, cout_wrap; // byte counter wrap count (RADIUS accounting giagawords)
180 uint32_t cin_delta, cout_delta; // byte count changes (for dump_session())
181 uint16_t throttle_in; // upstream throttle rate (kbps)
182 uint16_t throttle_out; // downstream throttle rate
183 uint8_t filter_in; // input filter index (to ip_filters[N-1]; 0 if none)
184 uint8_t filter_out; // output filter index
185 uint16_t mru; // maximum receive unit
186 clockt opened; // when started
187 clockt die; // being closed, when to finally free
188 time_t last_packet; // Last packet from the user (used for idle timeouts)
189 in_addr_t dns1, dns2; // DNS servers
190 routet route[MAXROUTE]; // static routes
191 uint16_t tbf_in; // filter bucket for throttling in from the user.
192 uint16_t tbf_out; // filter bucket for throttling out to the user.
193 int random_vector_length;
194 char random_vector[MAXTEL];
195 char user[MAXUSER]; // user (needed in seesion for radius stop messages)
196 char called[MAXTEL]; // called number
197 char calling[MAXTEL]; // calling number
198 uint32_t tx_connect_speed;
199 uint32_t rx_connect_speed;
200 in_addr_t snoop_ip; // Interception destination IP
201 uint16_t snoop_port; // Interception destination port
202 uint8_t walled_garden; // is this session gardened?
203 uint8_t ipv6prefixlen; // IPv6 route prefix length
204 struct in6_addr ipv6route; // Static IPv6 route
205 char reserved[16]; // Space to expand structure without changing HB_VERSION
206 }
207 sessiont;
208
209 #define SF_IPCP_ACKED 1 // Has this session seen an IPCP Ack?
210 #define SF_LCP_ACKED 2 // LCP negotiated
211 #define SF_CCP_ACKED 4 // CCP negotiated
212 #define SF_IPV6CP_ACKED 8 // IPv6 negotiated
213 #define SF_IPV6_NACKED 16 // IPv6 rejected
214 #define SF_IPV6_ROUTED 32 // advertised v6 route
215
216 #define AUTHPAP 1 // allow PAP
217 #define AUTHCHAP 2 // allow CHAP
218
219 typedef struct
220 {
221 // packet counters
222 uint32_t pin;
223 uint32_t pout;
224
225 // byte counters
226 uint32_t cin;
227 uint32_t cout;
228
229 // DoS prevention
230 clockt last_packet_out;
231 uint32_t packets_out;
232 uint32_t packets_dropped;
233
234 // RADIUS session in use
235 uint16_t radius;
236
237 // interim RADIUS
238 time_t last_interim;
239 } sessionlocalt;
240
241 #define SESSIONPFC 1 // PFC negotiated flags
242 #define SESSIONACFC 2 // ACFC negotiated flags
243
244 // 168 bytes per tunnel
245 typedef struct
246 {
247 tunnelidt far; // far end tunnel ID
248 in_addr_t ip; // Ip for far end
249 uint16_t port; // port for far end
250 uint16_t window; // Rx window
251 uint16_t nr; // next receive
252 uint16_t ns; // next send
253 int state; // current state (tunnelstate enum)
254 clockt last; // when last control message sent (used for resend timeout)
255 clockt retry; // when to try resenting pending control
256 clockt die; // being closed, when to finally free
257 clockt lastrec; // when the last control message was received
258 char hostname[128]; // tunnel hostname
259 char vendor[128]; // LAC vendor
260 uint8_t try; // number of retrys on a control message
261 uint16_t controlc; // outstaind messages in queue
262 controlt *controls; // oldest message
263 controlt *controle; // newest message
264 }
265 tunnelt;
266
267 // 180 bytes per radius session
268 typedef struct // outstanding RADIUS requests
269 {
270 sessionidt session; // which session this applies to
271 hasht auth; // request authenticator
272 clockt retry; // when to try next
273 char calling[MAXTEL]; // calling number
274 char pass[129]; // password
275 uint8_t id; // ID for PPP response
276 uint8_t try; // which try we are on
277 uint8_t state; // state of radius requests
278 uint8_t chap; // set if CHAP used (is CHAP identifier)
279 }
280 radiust;
281
282 typedef struct
283 {
284 in_addr_t address; // Host byte order..
285 char assigned; // 1 if assigned, 0 if free
286 sessionidt session;
287 clockt last; // last used
288 char user[129]; // user (try to have ip addresses persistent)
289 }
290 ippoolt;
291
292 #ifdef RINGBUFFER
293 struct Tringbuffer
294 {
295 struct {
296 char level;
297 sessionidt session;
298 tunnelidt tunnel;
299 char message[MAX_LOG_LENGTH];
300 } buffer[RINGBUFFER_SIZE];
301 int head;
302 int tail;
303 };
304 #endif
305
306 /*
307 * Possible tunnel states
308 * TUNNELFREE -> TUNNELOPEN -> TUNNELDIE -> TUNNELFREE
309 */
310 enum
311 {
312 TUNNELFREE, // Not in use
313 TUNNELOPEN, // Active tunnel
314 TUNNELDIE, // Currently closing
315 TUNNELOPENING, // Busy opening
316 TUNNELUNDEF, // Undefined
317 };
318
319 enum
320 {
321 RADIUSNULL, // Not in use
322 RADIUSCHAP, // sending CHAP down PPP
323 RADIUSAUTH, // sending auth to RADIUS server
324 RADIUSIPCP, // sending IPCP to end user
325 RADIUSSTART, // sending start accounting to RADIUS server
326 RADIUSSTOP, // sending stop accounting to RADIUS server
327 RADIUSINTERIM, // sending interim accounting to RADIUS server
328 RADIUSWAIT, // waiting timeout before available, in case delayed replies
329 };
330
331 struct Tstats
332 {
333 time_t start_time;
334 time_t last_reset;
335
336 uint32_t tun_rx_packets;
337 uint32_t tun_tx_packets;
338 uint32_t tun_rx_bytes;
339 uint32_t tun_tx_bytes;
340 uint32_t tun_rx_errors;
341 uint32_t tun_tx_errors;
342 uint32_t tun_rx_dropped;
343
344 uint32_t tunnel_rx_packets;
345 uint32_t tunnel_tx_packets;
346 uint32_t tunnel_rx_bytes;
347 uint32_t tunnel_tx_bytes;
348 uint32_t tunnel_rx_errors;
349 uint32_t tunnel_tx_errors;
350
351 uint32_t tunnel_retries;
352 uint32_t radius_retries;
353
354 uint32_t arp_sent;
355
356 uint32_t packets_snooped;
357
358 uint32_t tunnel_created;
359 uint32_t session_created;
360 uint32_t tunnel_timeout;
361 uint32_t session_timeout;
362 uint32_t radius_timeout;
363 uint32_t radius_overflow;
364 uint32_t tunnel_overflow;
365 uint32_t session_overflow;
366
367 uint32_t ip_allocated;
368 uint32_t ip_freed;
369
370 uint32_t c_forwarded;
371 uint32_t recv_forward;
372
373 uint32_t select_called;
374 uint32_t multi_read_used;
375 uint32_t multi_read_exceeded;
376
377 #ifdef STATISTICS
378 uint32_t call_processtun;
379 uint32_t call_processipout;
380 uint32_t call_processipv6out;
381 uint32_t call_processudp;
382 uint32_t call_sessionbyip;
383 uint32_t call_sessionbyipv6;
384 uint32_t call_sessionbyuser;
385 uint32_t call_sendarp;
386 uint32_t call_sendipcp;
387 uint32_t call_processipv6cp;
388 uint32_t call_tunnelsend;
389 uint32_t call_sessionkill;
390 uint32_t call_sessionshutdown;
391 uint32_t call_tunnelkill;
392 uint32_t call_tunnelshutdown;
393 uint32_t call_assign_ip_address;
394 uint32_t call_free_ip_address;
395 uint32_t call_dump_acct_info;
396 uint32_t call_sessionsetup;
397 uint32_t call_processpap;
398 uint32_t call_processchap;
399 uint32_t call_processlcp;
400 uint32_t call_processipcp;
401 uint32_t call_processipin;
402 uint32_t call_processipv6in;
403 uint32_t call_processccp;
404 uint32_t call_sendchap;
405 uint32_t call_processrad;
406 uint32_t call_radiussend;
407 uint32_t call_radiusretry;
408 uint32_t call_random_data;
409 #endif
410 };
411
412 #ifdef STATISTICS
413
414 #ifdef STAT_CALLS
415 #define CSTAT(x) STAT(call_ ## x)
416 #else
417 #define CSTAT(x)
418 #endif
419
420 #define STAT(x) (_statistics->x++)
421 #define INC_STAT(x,y) (_statistics->x += (y))
422 #define GET_STAT(x) (_statistics->x)
423 #define SET_STAT(x, y) (_statistics->x = (y))
424 #else
425 #define CSTAT(x)
426 #define STAT(x)
427 #define INC_STAT(x,y)
428 #define GET_STAT(x) 0
429 #define SET_STAT(x, y)
430 #endif
431
432 typedef struct
433 {
434 int debug; // debugging level
435 time_t start_time; // time when l2tpns was started
436 char bandwidth[256]; // current bandwidth
437 char pid_file[256]; // file to write PID to on startup
438 int wrote_pid;
439 clockt current_time; // 1/10ths of a second since the process started.
440 // means that we can only run a given process
441 // for 13 years without re-starting!
442
443 char config_file[128];
444 int reload_config; // flag to re-read config (set by cli)
445 int multi_read_count; // amount of packets to read per fd in processing loop
446
447 char tundevice[10]; // tun device name
448 char log_filename[128];
449 char l2tpsecret[64];
450
451 char random_device[256]; // random device path, defaults to RANDOMDEVICE
452
453 char radiussecret[64];
454 int radius_accounting;
455 int radius_interim;
456 in_addr_t radiusserver[MAXRADSERVER]; // radius servers
457 uint16_t radiusport[MAXRADSERVER]; // radius base ports
458 uint8_t numradiusservers; // radius server count
459
460 char radius_authtypes_s[32]; // list of valid authentication types (chap, pap) in order of preference
461 int radius_authtypes;
462 int radius_authprefer;
463
464 int allow_duplicate_users; // allow multiple logins with the same username
465
466 in_addr_t default_dns1, default_dns2;
467
468 unsigned long rl_rate; // default throttle rate
469 int num_tbfs; // number of throttle buckets
470
471 char accounting_dir[128];
472 in_addr_t bind_address;
473 in_addr_t peer_address;
474 int send_garp; // Set to true to garp for vip address on startup
475
476 int target_uid;
477 int dump_speed;
478 char plugins[64][MAXPLUGINS];
479 char old_plugins[64][MAXPLUGINS];
480
481 int next_tbf; // Next HTB id available to use
482 int scheduler_fifo; // If the system has multiple CPUs, use FIFO scheduling
483 // policy for this process.
484 int lock_pages; // Lock pages into memory.
485 int icmp_rate; // Max number of ICMP unreachable per second to send
486 int max_packets; // DoS prevention: per session limit of packets/0.1s
487
488 in_addr_t cluster_address; // Multicast address of cluster.
489 // Send to this address to have everyone hear.
490 char cluster_interface[64]; // Which interface to listen for multicast on.
491 int cluster_iam_master; // Are we the cluster master???
492 int cluster_iam_uptodate; // Set if we've got a full set of state from the master.
493 in_addr_t cluster_master_address; // The network address of the cluster master.
494 // Zero if i am the cluster master.
495 int cluster_seq_number; // Sequence number of the next heartbeat we'll send out
496 // (or the seq number we're next expecting if we're a slave).
497 int cluster_undefined_sessions; // How many sessions we're yet to receive from the master.
498 int cluster_undefined_tunnels; // How many tunnels we're yet to receive from the master.
499 int cluster_highest_sessionid;
500 int cluster_highest_tunnelid;
501 clockt cluster_last_hb; // Last time we saw a heartbeat from the master.
502 int cluster_last_hb_ver; // Heartbeat version last seen from master
503 int cluster_num_changes; // Number of changes queued.
504
505 int cluster_hb_interval; // How often to send a heartbeat.
506 int cluster_hb_timeout; // How many missed heartbeats trigger an election.
507 uint64_t cluster_table_version; // # state changes processed by cluster
508
509 struct in6_addr ipv6_prefix; // Our IPv6 network pool.
510
511
512 int cluster_master_min_adv; // Master advertises routes while the number of up to date
513 // slaves is less than this value.
514
515 #ifdef BGP
516 #define BGP_NUM_PEERS 2
517 uint16_t as_number;
518 struct {
519 char name[64];
520 uint16_t as;
521 int keepalive;
522 int hold;
523 } neighbour[BGP_NUM_PEERS];
524 #endif
525 } configt;
526
527 enum config_typet { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IPv4, IPv6, MAC };
528 typedef struct
529 {
530 char *key;
531 int offset;
532 int size;
533 enum config_typet type;
534 } config_descriptt;
535
536 typedef struct
537 {
538 uint8_t op; // operation
539 #define FILTER_PORT_OP_NONE 0 // all ports match
540 #define FILTER_PORT_OP_EQ 1
541 #define FILTER_PORT_OP_NEQ 2
542 #define FILTER_PORT_OP_GT 3
543 #define FILTER_PORT_OP_LT 4
544 #define FILTER_PORT_OP_RANGE 5
545 uint16_t port; // port (host byte order)
546 uint16_t port2; // range
547 } ip_filter_portt;
548
549 typedef struct
550 {
551 int action; // permit/deny
552 #define FILTER_ACTION_DENY 1
553 #define FILTER_ACTION_PERMIT 2
554 uint8_t proto; // protocol: IPPROTO_* (netinet/in.h)
555 in_addr_t src_ip; // source ip (network byte order)
556 in_addr_t src_wild;
557 ip_filter_portt src_ports;
558 in_addr_t dst_ip; // dest ip
559 in_addr_t dst_wild;
560 ip_filter_portt dst_ports;
561 uint8_t frag; // apply to non-initial fragments
562 uint8_t tcp_flag_op; // match type: any, all, established
563 #define FILTER_FLAG_OP_ANY 1
564 #define FILTER_FLAG_OP_ALL 2
565 #define FILTER_FLAG_OP_EST 3
566 uint8_t tcp_sflags; // flags set
567 uint8_t tcp_cflags; // flags clear
568 uint32_t counter; // match count
569 } ip_filter_rulet;
570
571 #define TCP_FLAG_FIN 0x01
572 #define TCP_FLAG_SYN 0x02
573 #define TCP_FLAG_RST 0x04
574 #define TCP_FLAG_PSH 0x08
575 #define TCP_FLAG_ACK 0x10
576 #define TCP_FLAG_URG 0x20
577
578 #define MAXFILTER 32
579 #define MAXFILTER_RULES 32
580 typedef struct
581 {
582 char name[32]; // ACL name
583 int extended; // type: 0 = standard, 1 = extended
584 ip_filter_rulet rules[MAXFILTER_RULES];
585 int used; // session ref count
586 } ip_filtert;
587
588 // arp.c
589 void sendarp(int ifr_idx, const unsigned char* mac, in_addr_t ip);
590
591
592 // ppp.c
593 void processpap(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l);
594 void processchap(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l);
595 void processlcp(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l);
596 void processipcp(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l);
597 void processipv6cp(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l);
598 void processipin(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l);
599 void processipv6in(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l);
600 void processccp(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l);
601 void sendchap(tunnelidt t, sessionidt s);
602 uint8_t *makeppp(uint8_t *b, int size, uint8_t *p, int l, tunnelidt t, sessionidt s, uint16_t mtype);
603 void sendlcp(tunnelidt t, sessionidt s, int authtype);
604 void send_ipin(sessionidt s, uint8_t *buf, int len);
605
606
607 // radius.c
608 void initrad(void);
609 void radiussend(uint16_t r, uint8_t state);
610 void processrad(uint8_t *buf, int len, char socket_index);
611 void radiusretry(uint16_t r);
612 uint16_t radiusnew(sessionidt s);
613 void radiusclear(uint16_t r, sessionidt s);
614
615
616 // l2tpns.c
617 clockt backoff(uint8_t try);
618 void send_ipv6_ra(tunnelidt t, sessionidt s, struct in6_addr *ip);
619 void route6set(sessionidt s, struct in6_addr ip, int prefixlen, int add);
620 sessionidt sessionbyip(in_addr_t ip);
621 sessionidt sessionbyipv6(struct in6_addr ip);
622 sessionidt sessionbyuser(char *username);
623 void increment_counter(uint32_t *counter, uint32_t *wrap, uint32_t delta);
624 void random_data(uint8_t *buf, int len);
625 void sessionkill(sessionidt s, char *reason);
626 void sessionshutdown(sessionidt s, char *reason, int result, int error);
627 void send_garp(in_addr_t ip);
628 void tunnelsend(uint8_t *buf, uint16_t l, tunnelidt t);
629 void sendipcp(tunnelidt t, sessionidt s);
630 void processudp(uint8_t *buf, int len, struct sockaddr_in *addr);
631 void snoop_send_packet(char *packet, uint16_t size, in_addr_t destination, uint16_t port);
632 int ip_filter(uint8_t *buf, int len, uint8_t filter);
633 int cmd_show_ipcache(struct cli_def *cli, char *command, char **argv, int argc);
634 int cmd_show_hist_idle(struct cli_def *cli, char *command, char **argv, int argc);
635 int cmd_show_hist_open(struct cli_def *cli, char *command, char **argv, int argc);
636
637 #undef LOG
638 #undef LOG_HEX
639 #define LOG(D, s, t, f, ...) ({ if (D <= config->debug) _log(D, s, t, f, ## __VA_ARGS__); })
640 #define LOG_HEX(D, t, d, s) ({ if (D <= config->debug) _log_hex(D, t, d, s); })
641
642 void _log(int level, sessionidt s, tunnelidt t, const char *format, ...) __attribute__((format (printf, 4, 5)));
643 void _log_hex(int level, const char *title, const char *data, int maxsize);
644
645 int sessionsetup(tunnelidt t, sessionidt s);
646 int run_plugins(int plugin_type, void *data);
647 void rebuild_address_pool(void);
648 void throttle_session(sessionidt s, int rate_in, int rate_out);
649 int load_session(sessionidt, sessiont *);
650 void become_master(void); // We're the master; kick off any required master initializations.
651
652
653 // cli.c
654 void init_cli(char *hostname);
655 void cli_do_file(FILE *fh);
656 void cli_do(int sockfd);
657 int cli_arg_help(struct cli_def *cli, int cr_ok, char *entry, ...);
658
659
660 // icmp.c
661 void host_unreachable(in_addr_t destination, uint16_t id, in_addr_t source, char *packet, int packet_len);
662
663
664 extern tunnelt *tunnel;
665 extern sessiont *session;
666 extern sessionlocalt *sess_local;
667 extern ippoolt *ip_address_pool;
668 #define sessionfree (session[0].next)
669
670 #define log_backtrace(count, max) \
671 if (count++ < max) { \
672 void *array[20]; \
673 char **strings; \
674 int size, i; \
675 LOG(0, 0, t, "Backtrace follows:\n"); \
676 size = backtrace(array, 10); \
677 strings = backtrace_symbols(array, size); \
678 if (strings) for (i = 0; i < size; i++) \
679 { \
680 LOG(0, 0, t, " %s\n", strings[i]); \
681 } \
682 free(strings); \
683 }
684
685
686 extern configt *config;
687 extern time_t basetime; // Time when this process started.
688 extern time_t time_now; // Seconds since EPOCH.
689 extern char main_quit;
690 extern uint32_t last_id;
691 extern struct Tstats *_statistics;
692 extern in_addr_t my_address;
693 extern int tun_write(uint8_t *data, int size);
694 extern int clifd;
695 extern int epollfd;
696
697 struct event_data {
698 enum {
699 FD_TYPE_CONTROL,
700 FD_TYPE_CLI,
701 FD_TYPE_UDP,
702 FD_TYPE_TUN,
703 FD_TYPE_CLUSTER,
704 FD_TYPE_RADIUS,
705 FD_TYPE_BGP,
706 } type;
707 int index; // for RADIUS, BGP
708 };
709
710 #define TIME (config->current_time)
711
712 // macros for handling help in cli commands
713 #define CLI_HELP_REQUESTED (argc > 0 && argv[argc-1][strlen(argv[argc-1])-1] == '?')
714 #define CLI_HELP_NO_ARGS (argc > 1 || argv[0][1]) ? CLI_OK : cli_arg_help(cli, 1, NULL)
715
716 // CVS identifiers (for "show version file")
717 extern char const *cvs_id_arp;
718 extern char const *cvs_id_cli;
719 extern char const *cvs_id_cluster;
720 extern char const *cvs_id_constants;
721 extern char const *cvs_id_control;
722 extern char const *cvs_id_icmp;
723 extern char const *cvs_id_l2tpns;
724 extern char const *cvs_id_ll;
725 extern char const *cvs_id_md5;
726 extern char const *cvs_id_ppp;
727 extern char const *cvs_id_radius;
728 extern char const *cvs_id_tbf;
729 extern char const *cvs_id_util;
730
731 #endif /* __L2TPNS_H__ */