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ldpd: copy original sources from OpenBSD (14/09/2016)
[mirror_frr.git] / ldpd / ldpd.h
CommitLineData
8429abe0
RW		 1/* $OpenBSD$ */
2
3/*
4 * Copyright (c) 2013, 2016 Renato Westphal <renato@openbsd.org>
5 * Copyright (c) 2009 Michele Marchetto <michele@openbsd.org>
6 * Copyright (c) 2004 Esben Norby <norby@openbsd.org>
7 * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
8 *
9 * Permission to use, copy, modify, and distribute this software for any
10 * purpose with or without fee is hereby granted, provided that the above
11 * copyright notice and this permission notice appear in all copies.
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
14 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
15 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
16 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
17 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20 */
21
22#ifndef _LDPD_H_
23#define _LDPD_H_
24
25#include <sys/types.h>
26#include <sys/socket.h>
27#include <sys/queue.h>
28#include <sys/tree.h>
29#include <net/if.h>
30#include <netinet/in.h>
31#include <event.h>
32#include <imsg.h>
33
34#include "ldp.h"
35
36#define CONF_FILE "/etc/ldpd.conf"
37#define LDPD_SOCKET "/var/run/ldpd.sock"
38#define LDPD_USER "_ldpd"
39
40#define LDPD_OPT_VERBOSE 0x00000001
41#define LDPD_OPT_VERBOSE2 0x00000002
42#define LDPD_OPT_NOACTION 0x00000004
43
44#define TCP_MD5_KEY_LEN 80
45#define L2VPN_NAME_LEN 32
46
47#define RT_BUF_SIZE 16384
48#define MAX_RTSOCK_BUF 128 * 1024
49#define LDP_BACKLOG 128
50
51#define F_LDPD_INSERTED 0x0001
52#define F_CONNECTED 0x0002
53#define F_STATIC 0x0004
54#define F_DYNAMIC 0x0008
55#define F_REJECT 0x0010
56#define F_BLACKHOLE 0x0020
57#define F_REDISTRIBUTED 0x0040
58
59struct evbuf {
60 struct msgbuf wbuf;
61 struct event ev;
62};
63
64struct imsgev {
65 struct imsgbuf ibuf;
66 void (*handler)(int, short, void *);
67 struct event ev;
68 short events;
69};
70
71enum imsg_type {
72 IMSG_NONE,
73 IMSG_CTL_RELOAD,
74 IMSG_CTL_SHOW_INTERFACE,
75 IMSG_CTL_SHOW_DISCOVERY,
76 IMSG_CTL_SHOW_NBR,
77 IMSG_CTL_SHOW_LIB,
78 IMSG_CTL_SHOW_L2VPN_PW,
79 IMSG_CTL_SHOW_L2VPN_BINDING,
80 IMSG_CTL_CLEAR_NBR,
81 IMSG_CTL_FIB_COUPLE,
82 IMSG_CTL_FIB_DECOUPLE,
83 IMSG_CTL_KROUTE,
84 IMSG_CTL_KROUTE_ADDR,
85 IMSG_CTL_IFINFO,
86 IMSG_CTL_END,
87 IMSG_CTL_LOG_VERBOSE,
88 IMSG_KLABEL_CHANGE,
89 IMSG_KLABEL_DELETE,
90 IMSG_KPWLABEL_CHANGE,
91 IMSG_KPWLABEL_DELETE,
92 IMSG_IFSTATUS,
93 IMSG_NEWADDR,
94 IMSG_DELADDR,
95 IMSG_LABEL_MAPPING,
96 IMSG_LABEL_MAPPING_FULL,
97 IMSG_LABEL_REQUEST,
98 IMSG_LABEL_RELEASE,
99 IMSG_LABEL_WITHDRAW,
100 IMSG_LABEL_ABORT,
101 IMSG_REQUEST_ADD,
102 IMSG_REQUEST_ADD_END,
103 IMSG_MAPPING_ADD,
104 IMSG_MAPPING_ADD_END,
105 IMSG_RELEASE_ADD,
106 IMSG_RELEASE_ADD_END,
107 IMSG_WITHDRAW_ADD,
108 IMSG_WITHDRAW_ADD_END,
109 IMSG_ADDRESS_ADD,
110 IMSG_ADDRESS_DEL,
111 IMSG_NOTIFICATION,
112 IMSG_NOTIFICATION_SEND,
113 IMSG_NEIGHBOR_UP,
114 IMSG_NEIGHBOR_DOWN,
115 IMSG_NETWORK_ADD,
116 IMSG_NETWORK_DEL,
117 IMSG_SOCKET_IPC,
118 IMSG_SOCKET_NET,
119 IMSG_CLOSE_SOCKETS,
120 IMSG_REQUEST_SOCKETS,
121 IMSG_SETUP_SOCKETS,
122 IMSG_RECONF_CONF,
123 IMSG_RECONF_IFACE,
124 IMSG_RECONF_TNBR,
125 IMSG_RECONF_NBRP,
126 IMSG_RECONF_L2VPN,
127 IMSG_RECONF_L2VPN_IF,
128 IMSG_RECONF_L2VPN_PW,
129 IMSG_RECONF_END
130};
131
132union ldpd_addr {
133 struct in_addr v4;
134 struct in6_addr v6;
135};
136
137#define IN6_IS_SCOPE_EMBED(a) \
138 ((IN6_IS_ADDR_LINKLOCAL(a)) || \
139 (IN6_IS_ADDR_MC_LINKLOCAL(a)) || \
140 (IN6_IS_ADDR_MC_INTFACELOCAL(a)))
141
142/* interface states */
143#define IF_STA_DOWN 0x01
144#define IF_STA_ACTIVE 0x02
145
146/* targeted neighbor states */
147#define TNBR_STA_DOWN 0x01
148#define TNBR_STA_ACTIVE 0x02
149
150/* interface types */
151enum iface_type {
152 IF_TYPE_POINTOPOINT,
153 IF_TYPE_BROADCAST
154};
155
156/* neighbor states */
157#define NBR_STA_PRESENT 0x0001
158#define NBR_STA_INITIAL 0x0002
159#define NBR_STA_OPENREC 0x0004
160#define NBR_STA_OPENSENT 0x0008
161#define NBR_STA_OPER 0x0010
162#define NBR_STA_SESSION (NBR_STA_INITIAL | NBR_STA_OPENREC | \
163 NBR_STA_OPENSENT | NBR_STA_OPER)
164
165/* neighbor events */
166enum nbr_event {
167 NBR_EVT_NOTHING,
168 NBR_EVT_MATCH_ADJ,
169 NBR_EVT_CONNECT_UP,
170 NBR_EVT_CLOSE_SESSION,
171 NBR_EVT_INIT_RCVD,
172 NBR_EVT_KEEPALIVE_RCVD,
173 NBR_EVT_PDU_RCVD,
174 NBR_EVT_PDU_SENT,
175 NBR_EVT_INIT_SENT
176};
177
178/* neighbor actions */
179enum nbr_action {
180 NBR_ACT_NOTHING,
181 NBR_ACT_RST_KTIMEOUT,
182 NBR_ACT_SESSION_EST,
183 NBR_ACT_RST_KTIMER,
184 NBR_ACT_CONNECT_SETUP,
185 NBR_ACT_PASSIVE_INIT,
186 NBR_ACT_KEEPALIVE_SEND,
187 NBR_ACT_CLOSE_SESSION
188};
189
190TAILQ_HEAD(mapping_head, mapping_entry);
191
192struct map {
193 uint8_t type;
194 uint32_t msg_id;
195 union {
196 struct {
197 uint16_t af;
198 union ldpd_addr prefix;
199 uint8_t prefixlen;
200 } prefix;
201 struct {
202 uint16_t type;
203 uint32_t pwid;
204 uint32_t group_id;
205 uint16_t ifmtu;
206 } pwid;
207 } fec;
208 struct {
209 uint32_t status_code;
210 uint32_t msg_id;
211 uint16_t msg_type;
212 } st;
213 uint32_t label;
214 uint32_t requestid;
215 uint32_t pw_status;
216 uint8_t flags;
217};
218#define F_MAP_REQ_ID 0x01 /* optional request message id present */
219#define F_MAP_STATUS 0x02 /* status */
220#define F_MAP_PW_CWORD 0x04 /* pseudowire control word */
221#define F_MAP_PW_ID 0x08 /* pseudowire connection id */
222#define F_MAP_PW_IFMTU 0x10 /* pseudowire interface parameter */
223#define F_MAP_PW_STATUS 0x20 /* pseudowire status */
224
225struct notify_msg {
226 uint32_t status_code;
227 uint32_t msg_id; /* network byte order */
228 uint16_t msg_type; /* network byte order */
229 uint32_t pw_status;
230 struct map fec;
231 uint8_t flags;
232};
233#define F_NOTIF_PW_STATUS 0x01 /* pseudowire status tlv present */
234#define F_NOTIF_FEC 0x02 /* fec tlv present */
235
236struct if_addr {
237 LIST_ENTRY(if_addr) entry;
238 int af;
239 union ldpd_addr addr;
240 uint8_t prefixlen;
241 union ldpd_addr dstbrd;
242};
243LIST_HEAD(if_addr_head, if_addr);
244
245struct iface_af {
246 struct iface *iface;
247 int af;
248 int enabled;
249 int state;
250 LIST_HEAD(, adj) adj_list;
251 time_t uptime;
252 struct event hello_timer;
253 uint16_t hello_holdtime;
254 uint16_t hello_interval;
255};
256
257struct iface {
258 LIST_ENTRY(iface) entry;
259 char name[IF_NAMESIZE];
260 unsigned int ifindex;
261 struct if_addr_head addr_list;
262 struct in6_addr linklocal;
263 enum iface_type type;
264 uint8_t if_type;
265 uint16_t flags;
266 uint8_t linkstate;
267 struct iface_af ipv4;
268 struct iface_af ipv6;
269};
270
271/* source of targeted hellos */
272struct tnbr {
273 LIST_ENTRY(tnbr) entry;
274 struct event hello_timer;
275 struct adj *adj;
276 int af;
277 union ldpd_addr addr;
278 int state;
279 uint16_t hello_holdtime;
280 uint16_t hello_interval;
281 uint16_t pw_count;
282 uint8_t flags;
283};
284#define F_TNBR_CONFIGURED 0x01
285#define F_TNBR_DYNAMIC 0x02
286
287enum auth_method {
288 AUTH_NONE,
289 AUTH_MD5SIG
290};
291
292/* neighbor specific parameters */
293struct nbr_params {
294 LIST_ENTRY(nbr_params) entry;
295 struct in_addr lsr_id;
296 uint16_t keepalive;
297 int gtsm_enabled;
298 uint8_t gtsm_hops;
299 struct {
300 enum auth_method method;
301 char md5key[TCP_MD5_KEY_LEN];
302 uint8_t md5key_len;
303 } auth;
304 uint8_t flags;
305};
306#define F_NBRP_KEEPALIVE 0x01
307#define F_NBRP_GTSM 0x02
308#define F_NBRP_GTSM_HOPS 0x04
309
310struct l2vpn_if {
311 LIST_ENTRY(l2vpn_if) entry;
312 struct l2vpn *l2vpn;
313 char ifname[IF_NAMESIZE];
314 unsigned int ifindex;
315 uint16_t flags;
316 uint8_t link_state;
317};
318
319struct l2vpn_pw {
320 LIST_ENTRY(l2vpn_pw) entry;
321 struct l2vpn *l2vpn;
322 struct in_addr lsr_id;
323 int af;
324 union ldpd_addr addr;
325 uint32_t pwid;
326 char ifname[IF_NAMESIZE];
327 unsigned int ifindex;
328 uint32_t remote_group;
329 uint16_t remote_mtu;
330 uint32_t remote_status;
331 uint8_t flags;
332};
333#define F_PW_STATUSTLV_CONF 0x01 /* status tlv configured */
334#define F_PW_STATUSTLV 0x02 /* status tlv negotiated */
335#define F_PW_CWORD_CONF 0x04 /* control word configured */
336#define F_PW_CWORD 0x08 /* control word negotiated */
337#define F_PW_STATUS_UP 0x10 /* pseudowire is operational */
338
339struct l2vpn {
340 LIST_ENTRY(l2vpn) entry;
341 char name[L2VPN_NAME_LEN];
342 int type;
343 int pw_type;
344 int mtu;
345 char br_ifname[IF_NAMESIZE];
346 unsigned int br_ifindex;
347 LIST_HEAD(, l2vpn_if) if_list;
348 LIST_HEAD(, l2vpn_pw) pw_list;
349};
350#define L2VPN_TYPE_VPWS 1
351#define L2VPN_TYPE_VPLS 2
352
353/* ldp_conf */
354enum ldpd_process {
355 PROC_MAIN,
356 PROC_LDP_ENGINE,
357 PROC_LDE_ENGINE
358} ldpd_process;
359
360enum socket_type {
361 LDP_SOCKET_DISC,
362 LDP_SOCKET_EDISC,
363 LDP_SOCKET_SESSION
364};
365
366enum hello_type {
367 HELLO_LINK,
368 HELLO_TARGETED
369};
370
371struct ldpd_af_conf {
372 uint16_t keepalive;
373 uint16_t thello_holdtime;
374 uint16_t thello_interval;
375 union ldpd_addr trans_addr;
376 int flags;
377};
378#define F_LDPD_AF_ENABLED 0x0001
379#define F_LDPD_AF_THELLO_ACCEPT 0x0002
380#define F_LDPD_AF_EXPNULL 0x0004
381#define F_LDPD_AF_NO_GTSM 0x0008
382
383struct ldpd_conf {
384 struct in_addr rtr_id;
385 struct ldpd_af_conf ipv4;
386 struct ldpd_af_conf ipv6;
387 LIST_HEAD(, iface) iface_list;
388 LIST_HEAD(, tnbr) tnbr_list;
389 LIST_HEAD(, nbr_params) nbrp_list;
390 LIST_HEAD(, l2vpn) l2vpn_list;
391 uint16_t trans_pref;
392 int flags;
393};
394#define F_LDPD_NO_FIB_UPDATE 0x0001
395#define F_LDPD_DS_CISCO_INTEROP 0x0002
396
397struct ldpd_af_global {
398 struct event disc_ev;
399 struct event edisc_ev;
400 int ldp_disc_socket;
401 int ldp_edisc_socket;
402 int ldp_session_socket;
403};
404
405struct ldpd_global {
406 int cmd_opts;
407 time_t uptime;
408 struct ldpd_af_global ipv4;
409 struct ldpd_af_global ipv6;
410 uint32_t conf_seqnum;
411 int pfkeysock;
412 struct if_addr_head addr_list;
413 LIST_HEAD(, adj) adj_list;
414 struct in_addr mcast_addr_v4;
415 struct in6_addr mcast_addr_v6;
416 TAILQ_HEAD(, pending_conn) pending_conns;
417};
418
419/* kroute */
420struct kroute {
421 int af;
422 union ldpd_addr prefix;
423 uint8_t prefixlen;
424 union ldpd_addr nexthop;
425 uint32_t local_label;
426 uint32_t remote_label;
427 unsigned short ifindex;
428 uint8_t priority;
429 uint16_t flags;
430};
431
432struct kpw {
433 unsigned short ifindex;
434 int pw_type;
435 int af;
436 union ldpd_addr nexthop;
437 uint32_t local_label;
438 uint32_t remote_label;
439 uint8_t flags;
440};
441
442struct kaddr {
443 unsigned short ifindex;
444 int af;
445 union ldpd_addr addr;
446 uint8_t prefixlen;
447 union ldpd_addr dstbrd;
448};
449
450struct kif {
451 char ifname[IF_NAMESIZE];
452 unsigned short ifindex;
453 int flags;
454 uint8_t link_state;
455 int mtu;
456 uint8_t if_type;
457 uint64_t baudrate;
458};
459
460/* control data structures */
461struct ctl_iface {
462 int af;
463 char name[IF_NAMESIZE];
464 unsigned int ifindex;
465 int state;
466 uint16_t flags;
467 uint8_t linkstate;
468 enum iface_type type;
469 uint8_t if_type;
470 uint16_t hello_holdtime;
471 uint16_t hello_interval;
472 time_t uptime;
473 uint16_t adj_cnt;
474};
475
476struct ctl_adj {
477 int af;
478 struct in_addr id;
479 enum hello_type type;
480 char ifname[IF_NAMESIZE];
481 union ldpd_addr src_addr;
482 uint16_t holdtime;
483 union ldpd_addr trans_addr;
484};
485
486struct ctl_nbr {
487 int af;
488 struct in_addr id;
489 union ldpd_addr laddr;
490 union ldpd_addr raddr;
491 time_t uptime;
492 int nbr_state;
493};
494
495struct ctl_rt {
496 int af;
497 union ldpd_addr prefix;
498 uint8_t prefixlen;
499 struct in_addr nexthop; /* lsr-id */
500 uint32_t local_label;
501 uint32_t remote_label;
502 uint8_t flags;
503 uint8_t in_use;
504};
505
506struct ctl_pw {
507 uint16_t type;
508 char ifname[IF_NAMESIZE];
509 uint32_t pwid;
510 struct in_addr lsr_id;
511 uint32_t local_label;
512 uint32_t local_gid;
513 uint16_t local_ifmtu;
514 uint32_t remote_label;
515 uint32_t remote_gid;
516 uint16_t remote_ifmtu;
517 uint32_t status;
518};
519
520extern struct ldpd_conf *ldpd_conf;
521extern struct ldpd_global global;
522
523/* parse.y */
524struct ldpd_conf *parse_config(char *);
525int cmdline_symset(char *);
526
527/* kroute.c */
528int kif_init(void);
529int kr_init(int);
530void kif_redistribute(const char *);
531int kr_change(struct kroute *);
532int kr_delete(struct kroute *);
533void kr_shutdown(void);
534void kr_fib_couple(void);
535void kr_fib_decouple(void);
536void kr_change_egress_label(int, int);
537void kr_show_route(struct imsg *);
538void kr_ifinfo(char *, pid_t);
539struct kif *kif_findname(char *);
540void kif_clear(void);
541int kmpw_set(struct kpw *);
542int kmpw_unset(struct kpw *);
543
544/* util.c */
545uint8_t mask2prefixlen(in_addr_t);
546uint8_t mask2prefixlen6(struct sockaddr_in6 *);
547in_addr_t prefixlen2mask(uint8_t);
548struct in6_addr *prefixlen2mask6(uint8_t);
549void ldp_applymask(int, union ldpd_addr *,
550 const union ldpd_addr *, int);
551int ldp_addrcmp(int, const union ldpd_addr *,
552 const union ldpd_addr *);
553int ldp_addrisset(int, const union ldpd_addr *);
554int ldp_prefixcmp(int, const union ldpd_addr *,
555 const union ldpd_addr *, uint8_t);
556int bad_addr_v4(struct in_addr);
557int bad_addr_v6(struct in6_addr *);
558int bad_addr(int, union ldpd_addr *);
559void embedscope(struct sockaddr_in6 *);
560void recoverscope(struct sockaddr_in6 *);
561void addscope(struct sockaddr_in6 *, uint32_t);
562void clearscope(struct in6_addr *);
563struct sockaddr *addr2sa(int af, union ldpd_addr *, uint16_t);
564void sa2addr(struct sockaddr *, int *, union ldpd_addr *);
565
566/* ldpd.c */
567void main_imsg_compose_ldpe(int, pid_t, void *, uint16_t);
568void main_imsg_compose_lde(int, pid_t, void *, uint16_t);
569void imsg_event_add(struct imsgev *);
570int imsg_compose_event(struct imsgev *, uint16_t, uint32_t, pid_t,
571 int, void *, uint16_t);
572void evbuf_enqueue(struct evbuf *, struct ibuf *);
573void evbuf_event_add(struct evbuf *);
574void evbuf_init(struct evbuf *, int, void (*)(int, short, void *), void *);
575void evbuf_clear(struct evbuf *);
576struct ldpd_af_conf *ldp_af_conf_get(struct ldpd_conf *, int);
577struct ldpd_af_global *ldp_af_global_get(struct ldpd_global *, int);
578int ldp_is_dual_stack(struct ldpd_conf *);
579void merge_config(struct ldpd_conf *, struct ldpd_conf *);
580struct ldpd_conf *config_new_empty(void);
581void config_clear(struct ldpd_conf *);
582
583/* socket.c */
584int ldp_create_socket(int, enum socket_type);
585void sock_set_recvbuf(int);
586int sock_set_reuse(int, int);
587int sock_set_bindany(int, int);
588int sock_set_ipv4_tos(int, int);
589int sock_set_ipv4_recvif(int, int);
590int sock_set_ipv4_minttl(int, int);
591int sock_set_ipv4_ucast_ttl(int fd, int);
592int sock_set_ipv4_mcast_ttl(int, uint8_t);
593int sock_set_ipv4_mcast(struct iface *);
594int sock_set_ipv4_mcast_loop(int);
595int sock_set_ipv6_dscp(int, int);
596int sock_set_ipv6_pktinfo(int, int);
597int sock_set_ipv6_minhopcount(int, int);
598int sock_set_ipv6_ucast_hops(int, int);
599int sock_set_ipv6_mcast_hops(int, int);
600int sock_set_ipv6_mcast(struct iface *);
601int sock_set_ipv6_mcast_loop(int);
602
603/* printconf.c */
604void print_config(struct ldpd_conf *);
605
606#endif /* _LDPD_H_ */
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