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 #define min(x,y) ((x) <= (y) ? (x) : (y))
  34 #define max(x,y) ((x) > (y) ? (x) : (y))
  35
  36 /* forward declarations */
  37 TAILQ_HEAD(mapping_head, mapping_entry);
  38
  39 struct hello_source {
  40         enum hello_type          type;
  41         struct {
  42                 struct iface_af *ia;
  43                 union ldpd_addr  src_addr;
  44         } link;
  45         struct tnbr             *target;
  46 };
  47
  48 struct adj {
  49         RB_ENTRY(adj)            global_entry, nbr_entry, ia_entry;
  50         struct in_addr           lsr_id;
  51         struct nbr              *nbr;
  52         int                      ds_tlv;
  53         struct hello_source      source;
  54         struct thread           *inactivity_timer;
  55         uint16_t                 holdtime;
  56         union ldpd_addr          trans_addr;
  57 };
  58 RB_PROTOTYPE(global_adj_head, adj, global_entry, adj_compare)
  59 RB_PROTOTYPE(nbr_adj_head, adj, nbr_entry, adj_compare)
  60 RB_PROTOTYPE(ia_adj_head, adj, ia_entry, adj_compare)
  61
  62 struct tcp_conn {
  63         struct nbr              *nbr;
  64         int                      fd;
  65         struct ibuf_read        *rbuf;
  66         struct evbuf             wbuf;
  67         struct thread           *rev;
  68         in_port_t                lport;
  69         in_port_t                rport;
  70 };
  71
  72 struct nbr {
  73         RB_ENTRY(nbr)            id_tree, addr_tree, pid_tree;
  74         struct tcp_conn         *tcp;
  75         struct nbr_adj_head      adj_tree;      /* adjacencies */
  76         struct thread           *ev_connect;
  77         struct thread           *keepalive_timer;
  78         struct thread           *keepalive_timeout;
  79         struct thread           *init_timeout;
  80         struct thread           *initdelay_timer;
  81
  82         struct mapping_head      mapping_list;
  83         struct mapping_head      withdraw_list;
  84         struct mapping_head      request_list;
  85         struct mapping_head      release_list;
  86         struct mapping_head      abortreq_list;
  87
  88         uint32_t                 peerid;        /* unique ID in DB */
  89         int                      af;
  90         int                      ds_tlv;
  91         int                      v4_enabled;    /* announce/process v4 msgs */
  92         int                      v6_enabled;    /* announce/process v6 msgs */
  93         struct in_addr           id;            /* lsr id */
  94         union ldpd_addr          laddr;         /* local address */
  95         union ldpd_addr          raddr;         /* remote address */
  96         ifindex_t                raddr_scope;   /* remote address scope (v6) */
  97         time_t                   uptime;
  98         int                      fd;
  99         int                      state;
 100         uint32_t                 conf_seqnum;
 101         int                      idtimer_cnt;
 102         uint16_t                 keepalive;
 103         uint16_t                 max_pdu_len;
 104         struct ldp_stats         stats;
 105
 106         struct {
 107                 uint8_t                 established;
 108                 uint32_t                spi_in;
 109                 uint32_t                spi_out;
 110                 enum auth_method        method;
 111                 char                    md5key[TCP_MD5_KEY_LEN];
 112         } auth;
 113         int                      flags;
 114 };
 115 #define F_NBR_GTSM_NEGOTIATED    0x01
 116 #define F_NBR_CAP_DYNAMIC        0x02
 117 #define F_NBR_CAP_TWCARD         0x04
 118 #define F_NBR_CAP_UNOTIF         0x08
 119
 120 RB_HEAD(nbr_id_head, nbr);
 121 RB_PROTOTYPE(nbr_id_head, nbr, id_tree, nbr_id_compare)
 122 RB_HEAD(nbr_addr_head, nbr);
 123 RB_PROTOTYPE(nbr_addr_head, nbr, addr_tree, nbr_addr_compare)
 124 RB_HEAD(nbr_pid_head, nbr);
 125 RB_PROTOTYPE(nbr_pid_head, nbr, pid_tree, nbr_pid_compare)
 126
 127 struct pending_conn {
 128         TAILQ_ENTRY(pending_conn)        entry;
 129         int                              fd;
 130         int                              af;
 131         union ldpd_addr                  addr;
 132         struct thread                   *ev_timeout;
 133 };
 134 #define PENDING_CONN_TIMEOUT    5
 135
 136 struct mapping_entry {
 137         TAILQ_ENTRY(mapping_entry)      entry;
 138         struct map                      map;
 139 };
 140
 141 struct ldpd_sysdep {
 142         uint8_t         no_pfkey;
 143         uint8_t         no_md5sig;
 144 };
 145
 146 extern struct ldpd_conf         *leconf;
 147 extern struct ldpd_sysdep        sysdep;
 148 extern struct nbr_id_head        nbrs_by_id;
 149 extern struct nbr_addr_head      nbrs_by_addr;
 150 extern struct nbr_pid_head       nbrs_by_pid;
 151
 152 /* accept.c */
 153 void    accept_init(void);
 154 int     accept_add(int, int (*)(struct thread *), void *);
 155 void    accept_del(int);
 156 void    accept_pause(void);
 157 void    accept_unpause(void);
 158
 159 /* hello.c */
 160 int      send_hello(enum hello_type, struct iface_af *, struct tnbr *);
 161 void     recv_hello(struct in_addr, struct ldp_msg *, int, union ldpd_addr *,
 162             struct iface *, int, char *, uint16_t);
 163
 164 /* init.c */
 165 void     send_init(struct nbr *);
 166 int      recv_init(struct nbr *, char *, uint16_t);
 167 void     send_capability(struct nbr *, uint16_t, int);
 168 int      recv_capability(struct nbr *, char *, uint16_t);
 169
 170 /* keepalive.c */
 171 void     send_keepalive(struct nbr *);
 172 int      recv_keepalive(struct nbr *, char *, uint16_t);
 173
 174 /* notification.c */
 175 void     send_notification_full(struct tcp_conn *, struct notify_msg *);
 176 void     send_notification(struct tcp_conn *, uint32_t, uint32_t, uint16_t);
 177 void     send_notification_rtlvs(struct nbr *, uint32_t, uint32_t, uint16_t,
 178             uint16_t, uint16_t, char *);
 179 int      recv_notification(struct nbr *, char *, uint16_t);
 180 int      gen_status_tlv(struct ibuf *, uint32_t, uint32_t, uint16_t);
 181
 182 /* address.c */
 183 void     send_address_single(struct nbr *, struct if_addr *, int);
 184 void     send_address_all(struct nbr *, int);
 185 void     send_mac_withdrawal(struct nbr *, struct map *, uint8_t *);
 186 int      recv_address(struct nbr *, char *, uint16_t);
 187
 188 /* labelmapping.c */
 189 #define PREFIX_SIZE(x)  (((x) + 7) / 8)
 190 void     send_labelmessage(struct nbr *, uint16_t, struct mapping_head *);
 191 int      recv_labelmessage(struct nbr *, char *, uint16_t, uint16_t);
 192 int      gen_pw_status_tlv(struct ibuf *, uint32_t);
 193 uint16_t len_fec_tlv(struct map *);
 194 int      gen_fec_tlv(struct ibuf *, struct map *);
 195 int      tlv_decode_fec_elm(struct nbr *, struct ldp_msg *, char *,
 196             uint16_t, struct map *);
 197
 198 /* ldpe.c */
 199 void             ldpe(void);
 200 void             ldpe_init(struct ldpd_init *);
 201 int              ldpe_imsg_compose_parent(int, pid_t, void *,
 202                     uint16_t);
 203 void             ldpe_imsg_compose_parent_sync(int, pid_t, void *, uint16_t);
 204 int              ldpe_imsg_compose_lde(int, uint32_t, pid_t, void *,
 205                     uint16_t);
 206 int              ldpe_acl_check(char *, int, union ldpd_addr *, uint8_t);
 207 void             ldpe_reset_nbrs(int);
 208 void             ldpe_reset_ds_nbrs(void);
 209 void             ldpe_remove_dynamic_tnbrs(int);
 210 void             ldpe_stop_init_backoff(int);
 211 struct ctl_conn;
 212 void             ldpe_iface_ctl(struct ctl_conn *c, ifindex_t ifidx);
 213 void             ldpe_adj_ctl(struct ctl_conn *);
 214 void             ldpe_adj_detail_ctl(struct ctl_conn *);
 215 void             ldpe_nbr_ctl(struct ctl_conn *);
 216 void             ldpe_ldp_sync_ctl(struct ctl_conn *);
 217 void             mapping_list_add(struct mapping_head *, struct map *);
 218 void             mapping_list_clr(struct mapping_head *);
 219 void             ldpe_set_config_change_time(void);
 220
 221 /* interface.c */
 222 struct iface    *if_new(const char *);
 223 void             ldpe_if_init(struct iface *);
 224 void             ldpe_if_exit(struct iface *);
 225 struct iface    *if_lookup(struct ldpd_conf *c, ifindex_t ifidx);
 226 struct iface    *if_lookup_name(struct ldpd_conf *, const char *);
 227 void             if_update_info(struct iface *, struct kif *);
 228 struct iface_af *iface_af_get(struct iface *, int);
 229 void             if_addr_add(struct kaddr *);
 230 void             if_addr_del(struct kaddr *);
 231 void             ldp_if_update(struct iface *, int);
 232 void             if_update_all(int);
 233 uint16_t         if_get_hello_holdtime(struct iface_af *);
 234 uint16_t         if_get_hello_interval(struct iface_af *);
 235 uint16_t         if_get_wait_for_sync_interval(void);
 236 struct ctl_iface *if_to_ctl(struct iface_af *);
 237 in_addr_t        if_get_ipv4_addr(struct iface *);
 238 int              ldp_sync_fsm_adj_event(struct adj *, enum ldp_sync_event);
 239 int              ldp_sync_fsm_nbr_event(struct nbr *, enum ldp_sync_event);
 240 int              ldp_sync_fsm_state_req(struct ldp_igp_sync_if_state_req *);
 241 int              ldp_sync_fsm(struct iface *, enum ldp_sync_event);
 242 void             ldp_sync_fsm_reset_all(void);
 243 const char      *ldp_sync_state_name(int);
 244 const char      *ldp_sync_event_name(int);
 245 struct ctl_ldp_sync *ldp_sync_to_ctl(struct iface *);
 246
 247 /* adjacency.c */
 248 struct adj      *adj_new(struct in_addr, struct hello_source *,
 249                     union ldpd_addr *);
 250 void             adj_del(struct adj *, uint32_t);
 251 struct adj      *adj_find(struct in_addr, struct hello_source *);
 252 int              adj_get_af(const struct adj *adj);
 253 void             adj_start_itimer(struct adj *);
 254 void             adj_stop_itimer(struct adj *);
 255 struct tnbr     *tnbr_new(int, union ldpd_addr *);
 256 struct tnbr     *tnbr_find(struct ldpd_conf *, int, union ldpd_addr *);
 257 struct tnbr     *tnbr_check(struct ldpd_conf *, struct tnbr *);
 258 void             tnbr_update(struct tnbr *);
 259 void             tnbr_update_all(int);
 260 uint16_t         tnbr_get_hello_holdtime(struct tnbr *);
 261 uint16_t         tnbr_get_hello_interval(struct tnbr *);
 262 struct ctl_adj  *adj_to_ctl(struct adj *);
 263
 264 /* neighbor.c */
 265 int                      nbr_fsm(struct nbr *, enum nbr_event);
 266 struct nbr              *nbr_new(struct in_addr, int, int, union ldpd_addr *,
 267                             uint32_t);
 268 void                     nbr_del(struct nbr *);
 269 struct nbr              *nbr_find_ldpid(uint32_t);
 270 struct nbr              *nbr_get_first_ldpid(void);
 271 struct nbr              *nbr_get_next_ldpid(uint32_t);
 272 struct nbr              *nbr_find_addr(int, union ldpd_addr *);
 273 struct nbr              *nbr_find_peerid(uint32_t);
 274 int                      nbr_adj_count(struct nbr *, int);
 275 int                      nbr_session_active_role(struct nbr *);
 276 void                     nbr_stop_ktimer(struct nbr *);
 277 void                     nbr_stop_ktimeout(struct nbr *);
 278 void                     nbr_stop_itimeout(struct nbr *);
 279 void                     nbr_start_idtimer(struct nbr *);
 280 void                     nbr_stop_idtimer(struct nbr *);
 281 int                      nbr_pending_idtimer(struct nbr *);
 282 int                      nbr_pending_connect(struct nbr *);
 283 int                      nbr_establish_connection(struct nbr *);
 284 int                      nbr_gtsm_enabled(struct nbr *, struct nbr_params *);
 285 int                      nbr_gtsm_setup(int, int, struct nbr_params *);
 286 int                      nbr_gtsm_check(int, struct nbr *, struct nbr_params *);
 287 struct nbr_params       *nbr_params_new(struct in_addr);
 288 struct nbr_params       *nbr_params_find(struct ldpd_conf *, struct in_addr);
 289 uint16_t                 nbr_get_keepalive(int, struct in_addr);
 290 struct ctl_nbr          *nbr_to_ctl(struct nbr *);
 291 void                     nbr_clear_ctl(struct ctl_nbr *);
 292
 293 /* packet.c */
 294 int                      gen_ldp_hdr(struct ibuf *, uint16_t);
 295 int                      gen_msg_hdr(struct ibuf *, uint16_t, uint16_t);
 296 int                      send_packet(int, int, union ldpd_addr *,
 297                             struct iface_af *, void *, size_t);
 298 int                      disc_recv_packet(struct thread *);
 299 int                      session_accept(struct thread *);
 300 void                     session_accept_nbr(struct nbr *, int);
 301 void                     session_shutdown(struct nbr *, uint32_t, uint32_t,
 302                             uint32_t);
 303 void                     session_close(struct nbr *);
 304 struct tcp_conn         *tcp_new(int, struct nbr *);
 305 void                     pending_conn_del(struct pending_conn *);
 306 struct pending_conn     *pending_conn_find(int, union ldpd_addr *);
 307
 308 extern char *pkt_ptr; /* packet buffer */
 309
 310 /* pfkey.c */
 311 #ifdef __OpenBSD__
 312 int     pfkey_read(int, struct sadb_msg *);
 313 int     pfkey_establish(struct nbr *, struct nbr_params *);
 314 int     pfkey_remove(struct nbr *);
 315 int     pfkey_init(void);
 316 #endif
 317
 318 /* l2vpn.c */
 319 void    ldpe_l2vpn_init(struct l2vpn *);
 320 void    ldpe_l2vpn_exit(struct l2vpn *);
 321 void    ldpe_l2vpn_pw_init(struct l2vpn_pw *);
 322 void    ldpe_l2vpn_pw_exit(struct l2vpn_pw *);
 323
 324 DECLARE_HOOK(ldp_nbr_state_change, (struct nbr * nbr, int old_state),
 325              (nbr, old_state));
 326
 327 #endif  /* _LDPE_H_ */