38ac3315dff0eeb42a33deb4a603945c146c83ae
[l2tpns.git] / l2tpns.h
1 // L2TPNS Global Stuff
2 // $Id: l2tpns.h,v 1.56 2005/02/09 02:39:05 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 "2.1.0"
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 5
26 #define RADIUS_MASK ((unsigned short)(((unsigned short)~0) >> (16 - RADIUS_SHIFT)))
27 #define MAXRADIUS ((unsigned long)(1L << RADIUS_SHIFT) * 255)
28
29 #define T_UNDEF (0xffff) // A tunnel ID that won't ever be used. Mark session as undefined.
30 #define T_FREE (0) // A tunnel ID that won't ever be used. Mark session as free.
31
32 #define MAXCONTROL 1000 // max length control message we ever send...
33 #define MAXETHER (1500+18) // max packet we try sending to tun
34 #define MAXTEL 96 // telephone number
35 #define MAXPLUGINS 20 // maximum number of plugins to load
36 #define MAXRADSERVER 10 // max radius servers
37 #define MAXROUTE 10 // max static routes per session
38 #define MAXIPPOOL 131072 // max number of ip addresses in pool
39 #define RINGBUFFER_SIZE 10000 // Number of ringbuffer entries to allocate
40 #define MAX_LOG_LENGTH 512 // Maximum size of log message
41 #define ECHO_TIMEOUT 60 // Time between last packet sent and LCP ECHO generation
42 #define IDLE_TIMEOUT 240 // Time between last packet sent and LCP ECHO generation
43 #define BUSY_WAIT_TIME 3000 // 5 minutes in 1/10th seconds to wait for radius to cleanup on shutdown
44
45 // Constants
46 #ifndef ETCDIR
47 #define ETCDIR "/etc/l2tpns"
48 #endif
49
50 #ifndef LIBDIR
51 #define LIBDIR "/usr/lib/l2tpns"
52 #endif
53
54 #ifndef STATEDIR
55 #define STATEDIR "/var/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 #ifndef DATADIR
71 #define DATADIR STATEDIR
72 #endif
73
74 #define TUNDEVICE "/dev/net/tun"
75 #define RANDOMDEVICE "/dev/urandom" // default, not as secure as /dev/random but non-blocking
76 #define STATEFILE DATADIR "/state.dump" // State dump file
77 #define CONFIGFILE FLASHDIR "/startup-config" // Configuration file
78 #define CLIUSERS FLASHDIR "/users" // CLI Users file
79 #define IPPOOLFILE FLASHDIR "/ip_pool" // Address pool configuration
80 #define ACCT_TIME 3000 // 5 minute accounting interval
81 #define ACCT_SHUT_TIME 600 // 1 minute for counters of shutdown sessions
82 #define L2TPPORT 1701 // L2TP port
83 #define RADPORT 1645 // old radius port...
84 #define PKTARP 0x0806 // ARP packet type
85 #define PKTIP 0x0800 // IPv4 packet type
86 #define PKTIPV6 0x86DD // IPv6 packet type
87 #define PPPPAP 0xC023
88 #define PPPCHAP 0xC223
89 #define PPPLCP 0xC021
90 #define PPPIPCP 0x8021
91 #define PPPIPV6CP 0x8057
92 #define PPPCCP 0x80FD
93 #define PPPIP 0x0021
94 #define PPPIPV6 0x0057
95 #define PPPMP 0x003D
96 #define MIN_IP_SIZE 0x19
97
98 enum {
99 ConfigReq = 1,
100 ConfigAck,
101 ConfigNak,
102 ConfigRej,
103 TerminateReq,
104 TerminateAck,
105 CodeRej,
106 ProtocolRej,
107 EchoReq,
108 EchoReply,
109 DiscardRequest,
110 IdentRequest
111 };
112
113 enum {
114 AccessRequest = 1,
115 AccessAccept,
116 AccessReject,
117 AccountingRequest,
118 AccountingResponse,
119 AccessChallenge = 11
120 };
121
122 // Types
123 typedef uint16_t sessionidt;
124 typedef uint16_t tunnelidt;
125 typedef uint32_t clockt;
126 typedef uint8_t hasht[16];
127
128 // CLI actions
129 struct cli_session_actions {
130 char action;
131 in_addr_t snoop_ip;
132 uint16_t snoop_port;
133 int throttle_in;
134 int throttle_out;
135 int filter_in;
136 int filter_out;
137 };
138
139 #define CLI_SESS_KILL 0x01
140 #define CLI_SESS_SNOOP 0x02
141 #define CLI_SESS_NOSNOOP 0x04
142 #define CLI_SESS_THROTTLE 0x08
143 #define CLI_SESS_NOTHROTTLE 0x10
144 #define CLI_SESS_FILTER 0x20
145 #define CLI_SESS_NOFILTER 0x40
146
147 struct cli_tunnel_actions {
148 char action;
149 };
150
151 #define CLI_TUN_KILL 0x01
152
153 // dump header: update number if internal format changes
154 #define DUMP_MAGIC "L2TPNS#" VERSION "#"
155
156 // structures
157 typedef struct // route
158 {
159 in_addr_t ip;
160 in_addr_t mask;
161 }
162 routet;
163
164 typedef struct controls // control message
165 {
166 struct controls *next; // next in queue
167 uint16_t length; // length
168 uint8_t buf[MAXCONTROL];
169 }
170 controlt;
171
172 typedef struct
173 {
174 sessionidt next; // next session in linked list
175 sessionidt far; // far end session ID
176 tunnelidt tunnel; // near end tunnel ID
177 in_addr_t ip; // IP of session set by RADIUS response (host byte order).
178 int ip_pool_index; // index to IP pool
179 unsigned long unique_id; // unique session id
180 uint16_t nr; // next receive
181 uint16_t ns; // next send
182 uint32_t magic; // ppp magic number
183 uint32_t cin, cout; // byte counts
184 uint32_t pin, pout; // packet counts
185 uint32_t total_cin; // This counter is never reset while a session is open
186 uint32_t total_cout; // This counter is never reset while a session is open
187 uint32_t id; // session id
188 uint16_t throttle_in; // upstream throttle rate (kbps)
189 uint16_t throttle_out; // downstream throttle rate
190 clockt opened; // when started
191 clockt die; // being closed, when to finally free
192 time_t last_packet; // Last packet from the user (used for idle timeouts)
193 in_addr_t dns1, dns2; // DNS servers
194 routet route[MAXROUTE]; // static routes
195 uint16_t radius; // which radius session is being used (0 for not waiting on authentication)
196 uint16_t mru; // maximum receive unit
197 uint16_t tbf_in; // filter bucket for throttling in from the user.
198 uint16_t tbf_out; // filter bucket for throttling out to the user.
199 uint8_t l2tp_flags; // various bit flags from the ICCN on the l2tp tunnel.
200 uint8_t reserved_old_snoop; // No longer used - remove at some time
201 uint8_t walled_garden; // is this session gardened?
202 uint8_t flags1; // additional flags (currently unused);
203 char random_vector[MAXTEL];
204 int random_vector_length;
205 char user[129]; // user (needed in seesion for radius stop messages) (can we reduce this? --mo)
206 char called[MAXTEL]; // called number
207 char calling[MAXTEL]; // calling number
208 uint32_t tx_connect_speed;
209 uint32_t rx_connect_speed;
210 uint32_t flags; // Various session flags.
211 in_addr_t snoop_ip; // Interception destination IP
212 uint16_t snoop_port; // Interception destination port
213 uint16_t sid; // near end session id.
214 uint8_t filter_in; // input filter index (to ip_filters[N-1]; 0 if none)
215 uint8_t filter_out; // output filter index
216 struct in6_addr ipv6route; // Static IPv6 route
217 uint8_t ipv6prefixlen; // IPv6 route prefix length
218 char reserved[1]; // Space to expand structure without changing HB_VERSION
219 }
220 sessiont;
221
222 #define SF_IPCP_ACKED 1 // Has this session seen an IPCP Ack?
223 #define SF_LCP_ACKED 2 // LCP negotiated
224 #define SF_CCP_ACKED 4 // CCP negotiated
225 #define SF_IPV6CP_ACKED 8 // IPv6 negotiated
226 #define SF_IPV6_NACKED 16 // IPv6 rejected
227 #define SF_IPV6_ROUTED 32 // advertised v6 route
228
229 #define AUTHPAP 1 // allow PAP
230 #define AUTHCHAP 2 // allow CHAP
231
232 typedef struct
233 {
234 // byte counters
235 uint32_t cin;
236 uint32_t cout;
237
238 // DoS prevention
239 clockt last_packet_out;
240 uint32_t packets_out;
241 uint32_t packets_dropped;
242 } sessionlocalt;
243
244 #define SESSIONPFC 1 // PFC negotiated flags
245 #define SESSIONACFC 2 // ACFC negotiated flags
246
247 // 168 bytes per tunnel
248 typedef struct
249 {
250 tunnelidt far; // far end tunnel ID
251 in_addr_t ip; // Ip for far end
252 uint16_t port; // port for far end
253 uint16_t window; // Rx window
254 uint16_t nr; // next receive
255 uint16_t ns; // next send
256 int state; // current state (tunnelstate enum)
257 clockt last; // when last control message sent (used for resend timeout)
258 clockt retry; // when to try resenting pending control
259 clockt die; // being closed, when to finally free
260 clockt lastrec; // when the last control message was received
261 char hostname[128]; // tunnel hostname
262 char vendor[128]; // LAC vendor
263 uint8_t try; // number of retrys on a control message
264 uint16_t controlc; // outstaind messages in queue
265 controlt *controls; // oldest message
266 controlt *controle; // newest message
267 }
268 tunnelt;
269
270 // 180 bytes per radius session
271 typedef struct // outstanding RADIUS requests
272 {
273 sessionidt session; // which session this applies to
274 hasht auth; // request authenticator
275 clockt retry; // when to try next
276 char calling[MAXTEL]; // calling number
277 char pass[129]; // password
278 uint8_t id; // ID for PPP response
279 uint8_t try; // which try we are on
280 uint8_t state; // state of radius requests
281 uint8_t chap; // set if CHAP used (is CHAP identifier)
282 }
283 radiust;
284
285 typedef struct
286 {
287 in_addr_t address; // Host byte order..
288 char assigned; // 1 if assigned, 0 if free
289 sessionidt session;
290 clockt last; // last used
291 char user[129]; // user (try to have ip addresses persistent)
292 }
293 ippoolt;
294
295 #ifdef RINGBUFFER
296 struct Tringbuffer
297 {
298 struct {
299 char level;
300 sessionidt session;
301 tunnelidt tunnel;
302 char message[MAX_LOG_LENGTH];
303 } buffer[RINGBUFFER_SIZE];
304 int head;
305 int tail;
306 };
307 #endif
308
309 /*
310 * Possible tunnel states
311 * TUNNELFREE -> TUNNELOPEN -> TUNNELDIE -> TUNNELFREE
312 */
313 enum
314 {
315 TUNNELFREE, // Not in use
316 TUNNELOPEN, // Active tunnel
317 TUNNELDIE, // Currently closing
318 TUNNELOPENING, // Busy opening
319 TUNNELUNDEF, // Undefined
320 };
321
322 enum
323 {
324 RADIUSNULL, // Not in use
325 RADIUSCHAP, // sending CHAP down PPP
326 RADIUSAUTH, // sending auth to RADIUS server
327 RADIUSIPCP, // sending IPCP to end user
328 RADIUSSTART, // sending start accounting to RADIUS server
329 RADIUSSTOP, // sending stop accounting to RADIUS server
330 RADIUSWAIT, // waiting timeout before available, in case delayed replies
331 RADIUSDEAD, // errored while talking to radius server.
332 };
333
334 struct Tstats
335 {
336 time_t start_time;
337 time_t last_reset;
338
339 uint32_t tun_rx_packets;
340 uint32_t tun_tx_packets;
341 uint32_t tun_rx_bytes;
342 uint32_t tun_tx_bytes;
343 uint32_t tun_rx_errors;
344 uint32_t tun_tx_errors;
345 uint32_t tun_rx_dropped;
346
347 uint32_t tunnel_rx_packets;
348 uint32_t tunnel_tx_packets;
349 uint32_t tunnel_rx_bytes;
350 uint32_t tunnel_tx_bytes;
351 uint32_t tunnel_rx_errors;
352 uint32_t tunnel_tx_errors;
353
354 uint32_t tunnel_retries;
355 uint32_t radius_retries;
356
357 uint32_t arp_sent;
358
359 uint32_t packets_snooped;
360
361 uint32_t tunnel_created;
362 uint32_t session_created;
363 uint32_t tunnel_timeout;
364 uint32_t session_timeout;
365 uint32_t radius_timeout;
366 uint32_t radius_overflow;
367 uint32_t tunnel_overflow;
368 uint32_t session_overflow;
369
370 uint32_t ip_allocated;
371 uint32_t ip_freed;
372
373 uint32_t c_forwarded;
374 uint32_t recv_forward;
375
376 uint32_t select_called;
377 uint32_t multi_read_used;
378 uint32_t multi_read_exceeded;
379
380 #ifdef STATISTICS
381 uint32_t call_processtun;
382 uint32_t call_processipout;
383 uint32_t call_processipv6out;
384 uint32_t call_processudp;
385 uint32_t call_sessionbyip;
386 uint32_t call_sessionbyipv6;
387 uint32_t call_sessionbyuser;
388 uint32_t call_sendarp;
389 uint32_t call_sendipcp;
390 uint32_t call_processipv6cp;
391 uint32_t call_tunnelsend;
392 uint32_t call_sessionkill;
393 uint32_t call_sessionshutdown;
394 uint32_t call_tunnelkill;
395 uint32_t call_tunnelshutdown;
396 uint32_t call_assign_ip_address;
397 uint32_t call_free_ip_address;
398 uint32_t call_dump_acct_info;
399 uint32_t call_sessionsetup;
400 uint32_t call_processpap;
401 uint32_t call_processchap;
402 uint32_t call_processlcp;
403 uint32_t call_processipcp;
404 uint32_t call_processipin;
405 uint32_t call_processipv6in;
406 uint32_t call_processccp;
407 uint32_t call_sendchap;
408 uint32_t call_processrad;
409 uint32_t call_radiussend;
410 uint32_t call_radiusretry;
411 uint32_t call_random_data;
412 #endif
413 };
414
415 #ifdef STATISTICS
416
417 #ifdef STAT_CALLS
418 #define CSTAT(x) STAT(call_ ## x)
419 #else
420 #define CSTAT(x)
421 #endif
422
423 #define STAT(x) (_statistics->x++)
424 #define INC_STAT(x,y) (_statistics->x += (y))
425 #define GET_STAT(x) (_statistics->x)
426 #define SET_STAT(x, y) (_statistics->x = (y))
427 #else
428 #define CSTAT(x)
429 #define STAT(x)
430 #define INC_STAT(x,y)
431 #define GET_STAT(x) 0
432 #define SET_STAT(x, y)
433 #endif
434
435 typedef struct
436 {
437 int debug; // debugging level
438 time_t start_time; // time when l2tpns was started
439 char bandwidth[256]; // current bandwidth
440 char pid_file[256]; // file to write PID to on startup
441 int wrote_pid;
442 clockt current_time; // 1/10ths of a second since the process started.
443 // means that we can only run a given process
444 // for 13 years without re-starting!
445
446 char config_file[128];
447 int reload_config; // flag to re-read config (set by cli)
448 int cleanup_interval; // interval between regular cleanups (in seconds)
449 int multi_read_count; // amount of packets to read per fd in processing loop
450
451 char tundevice[10]; // tun device name
452 char log_filename[128];
453 char l2tpsecret[64];
454
455 char random_device[256]; // random device path, defaults to RANDOMDEVICE
456
457 char radiussecret[64];
458 int radius_accounting;
459 in_addr_t radiusserver[MAXRADSERVER]; // radius servers
460 uint16_t radiusport[MAXRADSERVER]; // radius base ports
461 uint8_t numradiusservers; // radius server count
462 short num_radfds; // Number of radius filehandles allocated
463
464 char radius_authtypes_s[32]; // list of valid authentication types (chap, pap) in order of preference
465 int radius_authtypes;
466 int radius_authprefer;
467
468 in_addr_t default_dns1, default_dns2;
469
470 unsigned long rl_rate; // default throttle rate
471 int num_tbfs; // number of throttle buckets
472
473 char accounting_dir[128];
474 in_addr_t bind_address;
475 in_addr_t peer_address;
476 int send_garp; // Set to true to garp for vip address on startup
477
478 int target_uid;
479 int dump_speed;
480 char plugins[64][MAXPLUGINS];
481 char old_plugins[64][MAXPLUGINS];
482
483 int next_tbf; // Next HTB id available to use
484 int scheduler_fifo; // If the system has multiple CPUs, use FIFO scheduling policy for this process.
485 int lock_pages; // Lock pages into memory.
486 int icmp_rate; // Max number of ICMP unreachable per second to send
487 int max_packets; // DoS prevention: per session limit of packets/0.1s
488
489 in_addr_t cluster_address; // Multicast address of cluster.
490 // Send to this address to have everyone hear.
491 char cluster_interface[64]; // Which interface to listen for multicast on.
492 int cluster_iam_master; // Are we the cluster master???
493 int cluster_iam_uptodate; // Set if we've got a full set of state from the master.
494 in_addr_t cluster_master_address; // The network address of the cluster master.
495 // Zero if i am the cluster master.
496 int cluster_seq_number; // Sequence number of the next heartbeat we'll send out
497 // (or the seq number we're next expecting if we're a slave).
498 int cluster_undefined_sessions; // How many sessions we're yet to receive from the master.
499 int cluster_undefined_tunnels; // How many tunnels we're yet to receive from the master.
500 int cluster_highest_sessionid;
501 int cluster_highest_tunnelid;
502 clockt cluster_last_hb; // Last time we saw a heartbeat from the 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 #ifdef BGP
512 #define BGP_NUM_PEERS 2
513 uint16_t as_number;
514 struct {
515 char name[64];
516 uint16_t as;
517 int keepalive;
518 int hold;
519 } neighbour[BGP_NUM_PEERS];
520 #endif
521 } configt;
522
523 enum config_typet { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IPv4, IPv6, MAC };
524 typedef struct
525 {
526 char *key;
527 int offset;
528 int size;
529 enum config_typet type;
530 } config_descriptt;
531
532 typedef struct
533 {
534 uint8_t op; // operation
535 #define FILTER_PORT_OP_NONE 0 // all ports match
536 #define FILTER_PORT_OP_EQ 1
537 #define FILTER_PORT_OP_NEQ 2
538 #define FILTER_PORT_OP_GT 3
539 #define FILTER_PORT_OP_LT 4
540 #define FILTER_PORT_OP_RANGE 5
541 uint16_t port; // port (host byte order)
542 uint16_t port2; // range
543 } ip_filter_portt;
544
545 typedef struct
546 {
547 int action; // permit/deny
548 #define FILTER_ACTION_DENY 1
549 #define FILTER_ACTION_PERMIT 2
550 uint8_t proto; // protocol: IPPROTO_* (netinet/in.h)
551 in_addr_t src_ip; // source ip (network byte order)
552 in_addr_t src_wild;
553 ip_filter_portt src_ports;
554 in_addr_t dst_ip; // dest ip
555 in_addr_t dst_wild;
556 ip_filter_portt dst_ports;
557 uint8_t frag; // apply to non-initial fragments
558 uint8_t tcp_flag_op; // match type: any, all, established
559 #define FILTER_FLAG_OP_ANY 1
560 #define FILTER_FLAG_OP_ALL 2
561 #define FILTER_FLAG_OP_EST 3
562 uint8_t tcp_sflags; // flags set
563 uint8_t tcp_cflags; // flags clear
564 uint32_t counter; // match count
565 } ip_filter_rulet;
566
567 #define TCP_FLAG_FIN 0x01
568 #define TCP_FLAG_SYN 0x02
569 #define TCP_FLAG_RST 0x04
570 #define TCP_FLAG_PSH 0x08
571 #define TCP_FLAG_ACK 0x10
572 #define TCP_FLAG_URG 0x20
573
574 #define MAXFILTER 32
575 #define MAXFILTER_RULES 32
576 typedef struct
577 {
578 char name[32]; // ACL name
579 int extended; // type: 0 = standard, 1 = extended
580 ip_filter_rulet rules[MAXFILTER_RULES];
581 int used; // session ref count
582 } ip_filtert;
583
584 // arp.c
585 void sendarp(int ifr_idx, const unsigned char* mac, in_addr_t ip);
586
587
588 // ppp.c
589 void processpap(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l);
590 void processchap(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l);
591 void processlcp(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l);
592 void processipcp(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l);
593 void processipv6cp(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l);
594 void processipin(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l);
595 void processipv6in(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l);
596 void processccp(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l);
597 void sendchap(tunnelidt t, sessionidt s);
598 uint8_t *makeppp(uint8_t *b, int size, uint8_t *p, int l, tunnelidt t, sessionidt s, uint16_t mtype);
599 void initlcp(tunnelidt t, sessionidt s);
600 void send_ipin(sessionidt s, uint8_t *buf, int len);
601
602
603 // radius.c
604 void initrad(void);
605 void radiussend(uint16_t r, uint8_t state);
606 void processrad(uint8_t *buf, int len, char socket_index);
607 void radiusretry(uint16_t r);
608 uint16_t radiusnew(sessionidt s);
609 void radiusclear(uint16_t r, sessionidt s);
610
611
612 // l2tpns.c
613 clockt backoff(uint8_t try);
614 void send_ipv6_ra(tunnelidt t, sessionidt s, struct in6_addr *ip);
615 void route6set(sessionidt s, struct in6_addr ip, int prefixlen, int add);
616 sessionidt sessionbyip(in_addr_t ip);
617 sessionidt sessionbyipv6(struct in6_addr ip);
618 sessionidt sessionbyuser(char *username);
619 void random_data(uint8_t *buf, int len);
620 void sessionshutdown(sessionidt s, char *reason);
621 void send_garp(in_addr_t ip);
622 void tunnelsend(uint8_t *buf, uint16_t l, tunnelidt t);
623 void sendipcp(tunnelidt t, sessionidt s);
624 void processudp(uint8_t *buf, int len, struct sockaddr_in *addr);
625 void snoop_send_packet(char *packet, uint16_t size, in_addr_t destination, uint16_t port);
626 int ip_filter(uint8_t *buf, int len, uint8_t filter);
627 int cmd_show_ipcache(struct cli_def *cli, char *command, char **argv, int argc);
628 int cmd_show_hist_idle(struct cli_def *cli, char *command, char **argv, int argc);
629 int cmd_show_hist_open(struct cli_def *cli, char *command, char **argv, int argc);
630
631 #undef LOG
632 #undef LOG_HEX
633 #define LOG(D, s, t, f, ...) ({ if (D <= config->debug) _log(D, s, t, f, ## __VA_ARGS__); })
634 #define LOG_HEX(D, t, d, s) ({ if (D <= config->debug) _log_hex(D, t, d, s); })
635
636 void _log(int level, sessionidt s, tunnelidt t, const char *format, ...) __attribute__((format (printf, 4, 5)));
637 void _log_hex(int level, const char *title, const char *data, int maxsize);
638
639 int sessionsetup(tunnelidt t, sessionidt s);
640 int run_plugins(int plugin_type, void *data);
641 void rebuild_address_pool(void);
642 void throttle_session(sessionidt s, int rate_in, int rate_out);
643 int load_session(sessionidt, sessiont *);
644 void become_master(void); // We're the master; kick off any required master initializations.
645
646
647 // cli.c
648 void init_cli(char *hostname);
649 void cli_do_file(FILE *fh);
650 void cli_do(int sockfd);
651 int cli_arg_help(struct cli_def *cli, int cr_ok, char *entry, ...);
652
653
654 // icmp.c
655 void host_unreachable(in_addr_t destination, uint16_t id, in_addr_t source, char *packet, int packet_len);
656
657
658 extern tunnelt *tunnel;
659 extern sessiont *session;
660 extern sessionlocalt *sess_local;
661 extern ippoolt *ip_address_pool;
662 #define sessionfree (session[0].next)
663
664 #define log_backtrace(count, max) \
665 if (count++ < max) { \
666 void *array[20]; \
667 char **strings; \
668 int size, i; \
669 LOG(0, 0, t, "Backtrace follows"); \
670 size = backtrace(array, 10); \
671 strings = backtrace_symbols(array, size); \
672 if (strings) for (i = 0; i < size; i++) \
673 { \
674 LOG(0, 0, t, "%s\n", strings[i]); \
675 } \
676 free(strings); \
677 }
678
679
680 extern configt *config;
681 extern time_t basetime; // Time when this process started.
682 extern time_t time_now; // Seconds since EPOCH.
683 extern uint32_t last_id;
684 extern struct Tstats *_statistics;
685 extern in_addr_t my_address;
686 extern int tun_write(uint8_t *data, int size);
687 extern int clifd;
688
689
690 #define TIME (config->current_time)
691
692 // macros for handling help in cli commands
693 #define CLI_HELP_REQUESTED (argc > 0 && argv[argc-1][strlen(argv[argc-1])-1] == '?')
694 #define CLI_HELP_NO_ARGS (argc > 1 || argv[0][1]) ? CLI_OK : cli_arg_help(cli, 1, NULL)
695
696 // CVS identifiers (for "show version file")
697 extern char const *cvs_id_arp;
698 extern char const *cvs_id_cli;
699 extern char const *cvs_id_cluster;
700 extern char const *cvs_id_constants;
701 extern char const *cvs_id_control;
702 extern char const *cvs_id_icmp;
703 extern char const *cvs_id_l2tpns;
704 extern char const *cvs_id_ll;
705 extern char const *cvs_id_md5;
706 extern char const *cvs_id_ppp;
707 extern char const *cvs_id_radius;
708 extern char const *cvs_id_tbf;
709 extern char const *cvs_id_util;
710
711 #endif /* __L2TPNS_H__ */