ldpd/ldpe.h

   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, 2005, 2008 Esben Norby <norby@openbsd.org>
   7  *
   8  * Permission to use, copy, modify, and distribute this software for any
   9  * purpose with or without fee is hereby granted, provided that the above
  10  * copyright notice and this permission notice appear in all copies.
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  13  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  14  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  15  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  16  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  17  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  18  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  19  */
  20
  21 #ifndef _LDPE_H_
  22 #define _LDPE_H_
  23
  24 #include "queue.h"
  25 #include "openbsd-tree.h"
  26 #ifdef __OpenBSD__
  27 #include <net/pfkeyv2.h>
  28 #endif
  29
  30 #include "ldpd.h"
  31 #include "lib/ldp_sync.h"
  32
  33 /* forward declarations */
  34 TAILQ_HEAD(mapping_head, mapping_entry);
  35
  36 struct hello_source {
  37         enum hello_type          type;
  38         struct {
  39                 struct iface_af *ia;
  40                 union ldpd_addr  src_addr;
  41         } link;
  42         struct tnbr             *target;
  43 };
  44
  45 struct adj {
  46         RB_ENTRY(adj)            global_entry, nbr_entry, ia_entry;
  47         struct in_addr           lsr_id;
  48         struct nbr              *nbr;
  49         int                      ds_tlv;
  50         struct hello_source      source;
  51         struct thread           *inactivity_timer;
  52         uint16_t                 holdtime;
  53         union ldpd_addr          trans_addr;
  54 };
  55 RB_PROTOTYPE(global_adj_head, adj, global_entry, adj_compare)
  56 RB_PROTOTYPE(nbr_adj_head, adj, nbr_entry, adj_compare)
  57 RB_PROTOTYPE(ia_adj_head, adj, ia_entry, adj_compare)
  58
  59 struct tcp_conn {
  60         struct nbr              *nbr;
  61         int                      fd;
  62         struct ibuf_read        *rbuf;
  63         struct evbuf             wbuf;
  64         struct thread           *rev;
  65         in_port_t                lport;
  66         in_port_t                rport;
  67 };
  68
  69 struct nbr {
  70         RB_ENTRY(nbr)            id_tree, addr_tree, pid_tree;
  71         struct tcp_conn         *tcp;
  72         struct nbr_adj_head      adj_tree;      /* adjacencies */
  73         struct thread           *ev_connect;
  74         struct thread           *keepalive_timer;
  75         struct thread           *keepalive_timeout;
  76         struct thread           *init_timeout;
  77         struct thread           *initdelay_timer;
  78
  79         struct mapping_head      mapping_list;
  80         struct mapping_head      withdraw_list;
  81         struct mapping_head      request_list;
  82         struct mapping_head      release_list;
  83         struct mapping_head      abortreq_list;
  84
  85         uint32_t                 peerid;        /* unique ID in DB */
  86         int                      af;
  87         int                      ds_tlv;
  88         int                      v4_enabled;    /* announce/process v4 msgs */
  89         int                      v6_enabled;    /* announce/process v6 msgs */
  90         struct in_addr           id;            /* lsr id */
  91         union ldpd_addr          laddr;         /* local address */
  92         union ldpd_addr          raddr;         /* remote address */
  93         ifindex_t                raddr_scope;   /* remote address scope (v6) */
  94         time_t                   uptime;
  95         int                      fd;
  96         int                      state;
  97         uint32_t                 conf_seqnum;
  98         int                      idtimer_cnt;
  99         uint16_t                 keepalive;
 100         uint16_t                 max_pdu_len;
 101         struct ldp_stats         stats;
 102
 103         struct {
 104                 uint8_t                 established;
 105                 uint32_t                spi_in;
 106                 uint32_t                spi_out;
 107                 enum auth_method        method;
 108                 char                    md5key[TCP_MD5_KEY_LEN];
 109         } auth;
 110         int                      flags;
 111 };
 112 #define F_NBR_GTSM_NEGOTIATED    0x01
 113 #define F_NBR_CAP_DYNAMIC        0x02
 114 #define F_NBR_CAP_TWCARD         0x04
 115 #define F_NBR_CAP_UNOTIF         0x08
 116
 117 RB_HEAD(nbr_id_head, nbr);
 118 RB_PROTOTYPE(nbr_id_head, nbr, id_tree, nbr_id_compare)
 119 RB_HEAD(nbr_addr_head, nbr);
 120 RB_PROTOTYPE(nbr_addr_head, nbr, addr_tree, nbr_addr_compare)
 121 RB_HEAD(nbr_pid_head, nbr);
 122 RB_PROTOTYPE(nbr_pid_head, nbr, pid_tree, nbr_pid_compare)
 123
 124 struct pending_conn {
 125         TAILQ_ENTRY(pending_conn)        entry;
 126         int                              fd;
 127         int                              af;
 128         union ldpd_addr                  addr;
 129         struct thread                   *ev_timeout;
 130 };
 131 #define PENDING_CONN_TIMEOUT    5
 132
 133 struct mapping_entry {
 134         TAILQ_ENTRY(mapping_entry)      entry;
 135         struct map                      map;
 136 };
 137
 138 struct ldpd_sysdep {
 139         uint8_t         no_pfkey;
 140         uint8_t         no_md5sig;
 141 };
 142
 143 extern struct ldpd_conf         *leconf;
 144 extern struct ldpd_sysdep        sysdep;
 145 extern struct nbr_id_head        nbrs_by_id;
 146 extern struct nbr_addr_head      nbrs_by_addr;
 147 extern struct nbr_pid_head       nbrs_by_pid;
 148
 149 /* accept.c */
 150 void    accept_init(void);
 151 int accept_add(int, void (*)(struct thread *), void *);
 152 void    accept_del(int);
 153 void    accept_pause(void);
 154 void    accept_unpause(void);
 155
 156 /* hello.c */
 157 int      send_hello(enum hello_type, struct iface_af *, struct tnbr *);
 158 void     recv_hello(struct in_addr, struct ldp_msg *, int, union ldpd_addr *,
 159             struct iface *, int, char *, uint16_t);
 160
 161 /* init.c */
 162 void     send_init(struct nbr *);
 163 int      recv_init(struct nbr *, char *, uint16_t);
 164 void     send_capability(struct nbr *, uint16_t, int);
 165 int      recv_capability(struct nbr *, char *, uint16_t);
 166
 167 /* keepalive.c */
 168 void     send_keepalive(struct nbr *);
 169 int      recv_keepalive(struct nbr *, char *, uint16_t);
 170
 171 /* notification.c */
 172 void     send_notification_full(struct tcp_conn *, struct notify_msg *);
 173 void     send_notification(struct tcp_conn *, uint32_t, uint32_t, uint16_t);
 174 void     send_notification_rtlvs(struct nbr *, uint32_t, uint32_t, uint16_t,
 175             uint16_t, uint16_t, char *);
 176 int      recv_notification(struct nbr *, char *, uint16_t);
 177 int      gen_status_tlv(struct ibuf *, uint32_t, uint32_t, uint16_t);
 178
 179 /* address.c */
 180 void     send_address_single(struct nbr *, struct if_addr *, int);
 181 void     send_address_all(struct nbr *, int);
 182 void     send_mac_withdrawal(struct nbr *, struct map *, uint8_t *);
 183 int      recv_address(struct nbr *, char *, uint16_t);
 184
 185 /* labelmapping.c */
 186 #define PREFIX_SIZE(x)  (((x) + 7) / 8)
 187 void     send_labelmessage(struct nbr *, uint16_t, struct mapping_head *);
 188 int      recv_labelmessage(struct nbr *, char *, uint16_t, uint16_t);
 189 int      gen_pw_status_tlv(struct ibuf *, uint32_t);
 190 uint16_t len_fec_tlv(struct map *);
 191 int      gen_fec_tlv(struct ibuf *, struct map *);
 192 int      tlv_decode_fec_elm(struct nbr *, struct ldp_msg *, char *,
 193             uint16_t, struct map *);
 194
 195 /* ldpe.c */
 196 void             ldpe(void);
 197 void             ldpe_init(struct ldpd_init *);
 198 int              ldpe_imsg_compose_parent(int, pid_t, void *,
 199                     uint16_t);
 200 void             ldpe_imsg_compose_parent_sync(int, pid_t, void *, uint16_t);
 201 int              ldpe_imsg_compose_lde(int, uint32_t, pid_t, void *,
 202                     uint16_t);
 203 int              ldpe_acl_check(char *, int, union ldpd_addr *, uint8_t);
 204 void             ldpe_reset_nbrs(int);
 205 void             ldpe_reset_ds_nbrs(void);
 206 void             ldpe_remove_dynamic_tnbrs(int);
 207 void             ldpe_stop_init_backoff(int);
 208 struct ctl_conn;
 209 void             ldpe_iface_ctl(struct ctl_conn *c, ifindex_t ifidx);
 210 void             ldpe_adj_ctl(struct ctl_conn *);
 211 void             ldpe_adj_detail_ctl(struct ctl_conn *);
 212 void             ldpe_nbr_ctl(struct ctl_conn *);
 213 void             ldpe_ldp_sync_ctl(struct ctl_conn *);
 214 void             mapping_list_add(struct mapping_head *, struct map *);
 215 void             mapping_list_clr(struct mapping_head *);
 216 void             ldpe_set_config_change_time(void);
 217
 218 /* interface.c */
 219 struct iface    *if_new(const char *);
 220 void             ldpe_if_init(struct iface *);
 221 void             ldpe_if_exit(struct iface *);
 222 struct iface    *if_lookup(struct ldpd_conf *c, ifindex_t ifidx);
 223 struct iface    *if_lookup_name(struct ldpd_conf *, const char *);
 224 void             if_update_info(struct iface *, struct kif *);
 225 struct iface_af *iface_af_get(struct iface *, int);
 226 void             if_addr_add(struct kaddr *);
 227 void             if_addr_del(struct kaddr *);
 228 void             ldp_if_update(struct iface *, int);
 229 void             if_update_all(int);
 230 uint16_t         if_get_hello_holdtime(struct iface_af *);
 231 uint16_t         if_get_hello_interval(struct iface_af *);
 232 uint16_t         if_get_wait_for_sync_interval(void);
 233 struct ctl_iface *if_to_ctl(struct iface_af *);
 234 in_addr_t        if_get_ipv4_addr(struct iface *);
 235 int              ldp_sync_fsm_adj_event(struct adj *, enum ldp_sync_event);
 236 int              ldp_sync_fsm_nbr_event(struct nbr *, enum ldp_sync_event);
 237 int              ldp_sync_fsm_state_req(struct ldp_igp_sync_if_state_req *);
 238 int              ldp_sync_fsm(struct iface *, enum ldp_sync_event);
 239 void             ldp_sync_fsm_reset_all(void);
 240 const char      *ldp_sync_state_name(int);
 241 const char      *ldp_sync_event_name(int);
 242 struct ctl_ldp_sync *ldp_sync_to_ctl(struct iface *);
 243
 244 /* adjacency.c */
 245 struct adj      *adj_new(struct in_addr, struct hello_source *,
 246                     union ldpd_addr *);
 247 void             adj_del(struct adj *, uint32_t);
 248 struct adj      *adj_find(struct in_addr, struct hello_source *);
 249 int              adj_get_af(const struct adj *adj);
 250 void             adj_start_itimer(struct adj *);
 251 void             adj_stop_itimer(struct adj *);
 252 struct tnbr     *tnbr_new(int, union ldpd_addr *);
 253 struct tnbr     *tnbr_find(struct ldpd_conf *, int, union ldpd_addr *);
 254 struct tnbr     *tnbr_check(struct ldpd_conf *, struct tnbr *);
 255 void             tnbr_update(struct tnbr *);
 256 void             tnbr_update_all(int);
 257 uint16_t         tnbr_get_hello_holdtime(struct tnbr *);
 258 uint16_t         tnbr_get_hello_interval(struct tnbr *);
 259 struct ctl_adj  *adj_to_ctl(struct adj *);
 260
 261 /* neighbor.c */
 262 int                      nbr_fsm(struct nbr *, enum nbr_event);
 263 struct nbr              *nbr_new(struct in_addr, int, int, union ldpd_addr *,
 264                             uint32_t);
 265 void                     nbr_del(struct nbr *);
 266 struct nbr              *nbr_find_ldpid(uint32_t);
 267 struct nbr              *nbr_get_first_ldpid(void);
 268 struct nbr              *nbr_get_next_ldpid(uint32_t);
 269 struct nbr              *nbr_find_addr(int, union ldpd_addr *);
 270 struct nbr              *nbr_find_peerid(uint32_t);
 271 int                      nbr_adj_count(struct nbr *, int);
 272 int                      nbr_session_active_role(struct nbr *);
 273 void                     nbr_stop_ktimer(struct nbr *);
 274 void                     nbr_stop_ktimeout(struct nbr *);
 275 void                     nbr_stop_itimeout(struct nbr *);
 276 void                     nbr_start_idtimer(struct nbr *);
 277 void                     nbr_stop_idtimer(struct nbr *);
 278 int                      nbr_pending_idtimer(struct nbr *);
 279 int                      nbr_pending_connect(struct nbr *);
 280 int                      nbr_establish_connection(struct nbr *);
 281 int                      nbr_gtsm_enabled(struct nbr *, struct nbr_params *);
 282 int                      nbr_gtsm_setup(int, int, struct nbr_params *);
 283 int                      nbr_gtsm_check(int, struct nbr *, struct nbr_params *);
 284 struct nbr_params       *nbr_params_new(struct in_addr);
 285 struct nbr_params       *nbr_params_find(struct ldpd_conf *, struct in_addr);
 286 uint16_t                 nbr_get_keepalive(int, struct in_addr);
 287 struct ctl_nbr          *nbr_to_ctl(struct nbr *);
 288 void                     nbr_clear_ctl(struct ctl_nbr *);
 289
 290 /* packet.c */
 291 int                      gen_ldp_hdr(struct ibuf *, uint16_t);
 292 int                      gen_msg_hdr(struct ibuf *, uint16_t, uint16_t);
 293 int                      send_packet(int, int, union ldpd_addr *,
 294                             struct iface_af *, void *, size_t);
 295 void disc_recv_packet(struct thread *thread);
 296 void session_accept(struct thread *thread);
 297 void                     session_accept_nbr(struct nbr *, int);
 298 void                     session_shutdown(struct nbr *, uint32_t, uint32_t,
 299                             uint32_t);
 300 void                     session_close(struct nbr *);
 301 struct tcp_conn         *tcp_new(int, struct nbr *);
 302 void                     pending_conn_del(struct pending_conn *);
 303 struct pending_conn     *pending_conn_find(int, union ldpd_addr *);
 304
 305 extern char *pkt_ptr; /* packet buffer */
 306
 307 /* pfkey.c */
 308 #ifdef __OpenBSD__
 309 int     pfkey_read(int, struct sadb_msg *);
 310 int     pfkey_establish(struct nbr *, struct nbr_params *);
 311 int     pfkey_remove(struct nbr *);
 312 int     pfkey_init(void);
 313 #endif
 314
 315 /* l2vpn.c */
 316 void    ldpe_l2vpn_init(struct l2vpn *);
 317 void    ldpe_l2vpn_exit(struct l2vpn *);
 318 void    ldpe_l2vpn_pw_init(struct l2vpn_pw *);
 319 void    ldpe_l2vpn_pw_exit(struct l2vpn_pw *);
 320
 321 DECLARE_HOOK(ldp_nbr_state_change, (struct nbr * nbr, int old_state),
 322              (nbr, old_state));
 323
 324 #endif  /* _LDPE_H_ */