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 "openbsd-queue.h"
  25 #include "openbsd-tree.h"
  26 #ifdef __OpenBSD__
  27 #include <net/pfkeyv2.h>
  28 #endif
  29
  30 #include "ldpd.h"
  31
  32 #define min(x,y) ((x) <= (y) ? (x) : (y))
  33 #define max(x,y) ((x) > (y) ? (x) : (y))
  34
  35 /* forward declarations */
  36 TAILQ_HEAD(mapping_head, mapping_entry);
  37
  38 struct hello_source {
  39         enum hello_type          type;
  40         struct {
  41                 struct iface_af *ia;
  42                 union ldpd_addr  src_addr;
  43         } link;
  44         struct tnbr             *target;
  45 };
  46
  47 struct adj {
  48         RB_ENTRY(adj)            global_entry, nbr_entry, ia_entry;
  49         struct in_addr           lsr_id;
  50         struct nbr              *nbr;
  51         int                      ds_tlv;
  52         struct hello_source      source;
  53         struct thread           *inactivity_timer;
  54         uint16_t                 holdtime;
  55         union ldpd_addr          trans_addr;
  56 };
  57 RB_PROTOTYPE(global_adj_head, adj, global_entry, adj_compare)
  58 RB_PROTOTYPE(nbr_adj_head, adj, nbr_entry, adj_compare)
  59 RB_PROTOTYPE(ia_adj_head, adj, ia_entry, adj_compare)
  60
  61 struct tcp_conn {
  62         struct nbr              *nbr;
  63         int                      fd;
  64         struct ibuf_read        *rbuf;
  65         struct evbuf             wbuf;
  66         struct thread           *rev;
  67         in_port_t                lport;
  68         in_port_t                rport;
  69 };
  70
  71 struct nbr {
  72         RB_ENTRY(nbr)            id_tree, addr_tree, pid_tree;
  73         struct tcp_conn         *tcp;
  74         struct nbr_adj_head      adj_tree;      /* adjacencies */
  75         struct thread           *ev_connect;
  76         struct thread           *keepalive_timer;
  77         struct thread           *keepalive_timeout;
  78         struct thread           *init_timeout;
  79         struct thread           *initdelay_timer;
  80
  81         struct mapping_head      mapping_list;
  82         struct mapping_head      withdraw_list;
  83         struct mapping_head      request_list;
  84         struct mapping_head      release_list;
  85         struct mapping_head      abortreq_list;
  86
  87         uint32_t                 peerid;        /* unique ID in DB */
  88         int                      af;
  89         int                      ds_tlv;
  90         int                      v4_enabled;    /* announce/process v4 msgs */
  91         int                      v6_enabled;    /* announce/process v6 msgs */
  92         struct in_addr           id;            /* lsr id */
  93         union ldpd_addr          laddr;         /* local address */
  94         union ldpd_addr          raddr;         /* remote address */
  95         uint32_t                 raddr_scope;   /* remote address scope (v6) */
  96         time_t                   uptime;
  97         int                      fd;
  98         int                      state;
  99         uint32_t                 conf_seqnum;
 100         int                      idtimer_cnt;
 101         uint16_t                 keepalive;
 102         uint16_t                 max_pdu_len;
 103
 104         struct {
 105                 uint8_t                 established;
 106                 uint32_t                spi_in;
 107                 uint32_t                spi_out;
 108                 enum auth_method        method;
 109                 char                    md5key[TCP_MD5_KEY_LEN];
 110         } auth;
 111         int                      flags;
 112 };
 113 #define F_NBR_GTSM_NEGOTIATED    0x01
 114
 115 RB_HEAD(nbr_id_head, nbr);
 116 RB_PROTOTYPE(nbr_id_head, nbr, id_tree, nbr_id_compare)
 117 RB_HEAD(nbr_addr_head, nbr);
 118 RB_PROTOTYPE(nbr_addr_head, nbr, addr_tree, nbr_addr_compare)
 119 RB_HEAD(nbr_pid_head, nbr);
 120 RB_PROTOTYPE(nbr_pid_head, nbr, pid_tree, nbr_pid_compare)
 121
 122 struct pending_conn {
 123         TAILQ_ENTRY(pending_conn)        entry;
 124         int                              fd;
 125         int                              af;
 126         union ldpd_addr                  addr;
 127         struct thread                   *ev_timeout;
 128 };
 129 #define PENDING_CONN_TIMEOUT    5
 130
 131 struct mapping_entry {
 132         TAILQ_ENTRY(mapping_entry)      entry;
 133         struct map                      map;
 134 };
 135
 136 struct ldpd_sysdep {
 137         uint8_t         no_pfkey;
 138         uint8_t         no_md5sig;
 139 };
 140
 141 extern struct ldpd_conf         *leconf;
 142 extern struct ldpd_sysdep        sysdep;
 143 extern struct nbr_id_head        nbrs_by_id;
 144 extern struct nbr_addr_head      nbrs_by_addr;
 145 extern struct nbr_pid_head       nbrs_by_pid;
 146
 147 /* accept.c */
 148 void    accept_init(void);
 149 int     accept_add(int, int (*)(struct thread *), void *);
 150 void    accept_del(int);
 151 void    accept_pause(void);
 152 void    accept_unpause(void);
 153
 154 /* hello.c */
 155 int      send_hello(enum hello_type, struct iface_af *, struct tnbr *);
 156 void     recv_hello(struct in_addr, struct ldp_msg *, int, union ldpd_addr *,
 157             struct iface *, int, char *, uint16_t);
 158
 159 /* init.c */
 160 void     send_init(struct nbr *);
 161 int      recv_init(struct nbr *, char *, uint16_t);
 162
 163 /* keepalive.c */
 164 void     send_keepalive(struct nbr *);
 165 int      recv_keepalive(struct nbr *, char *, uint16_t);
 166
 167 /* notification.c */
 168 void     send_notification_full(struct tcp_conn *, struct notify_msg *);
 169 void     send_notification(uint32_t, struct tcp_conn *, uint32_t,
 170             uint16_t);
 171 void     send_notification_nbr(struct nbr *, uint32_t, uint32_t, uint16_t);
 172 int      recv_notification(struct nbr *, char *, uint16_t);
 173 int      gen_status_tlv(struct ibuf *, uint32_t, uint32_t, uint16_t);
 174
 175 /* address.c */
 176 void     send_address_single(struct nbr *, struct if_addr *, int);
 177 void     send_address_all(struct nbr *, int);
 178 int      recv_address(struct nbr *, char *, uint16_t);
 179
 180 /* labelmapping.c */
 181 #define PREFIX_SIZE(x)  (((x) + 7) / 8)
 182 void     send_labelmessage(struct nbr *, uint16_t, struct mapping_head *);
 183 int      recv_labelmessage(struct nbr *, char *, uint16_t, uint16_t);
 184 int      gen_pw_status_tlv(struct ibuf *, uint32_t);
 185 int      gen_fec_tlv(struct ibuf *, struct map *);
 186 int      tlv_decode_fec_elm(struct nbr *, struct ldp_msg *, char *,
 187             uint16_t, struct map *);
 188
 189 /* ldpe.c */
 190 void             ldpe(const char *, const char *, const char *);
 191 int              ldpe_imsg_compose_parent(int, pid_t, void *,
 192                     uint16_t);
 193 int              ldpe_imsg_compose_lde(int, uint32_t, pid_t, void *,
 194                     uint16_t);
 195 int              ldpe_acl_check(char *, int, union ldpd_addr *, uint8_t);
 196 void             ldpe_reset_nbrs(int);
 197 void             ldpe_reset_ds_nbrs(void);
 198 void             ldpe_remove_dynamic_tnbrs(int);
 199 void             ldpe_stop_init_backoff(int);
 200 struct ctl_conn;
 201 void             ldpe_iface_ctl(struct ctl_conn *, unsigned int);
 202 void             ldpe_adj_ctl(struct ctl_conn *);
 203 void             ldpe_nbr_ctl(struct ctl_conn *);
 204 void             mapping_list_add(struct mapping_head *, struct map *);
 205 void             mapping_list_clr(struct mapping_head *);
 206
 207 /* interface.c */
 208 struct iface    *if_new(struct kif *);
 209 void             if_exit(struct iface *);
 210 struct iface    *if_lookup(struct ldpd_conf *, unsigned short);
 211 struct iface    *if_lookup_name(struct ldpd_conf *, const char *);
 212 void             if_update_info(struct iface *, struct kif *);
 213 struct iface_af *iface_af_get(struct iface *, int);
 214 void             if_addr_add(struct kaddr *);
 215 void             if_addr_del(struct kaddr *);
 216 void             if_update(struct iface *, int);
 217 void             if_update_all(int);
 218 uint16_t         if_get_hello_holdtime(struct iface_af *);
 219 uint16_t         if_get_hello_interval(struct iface_af *);
 220 struct ctl_iface *if_to_ctl(struct iface_af *);
 221 in_addr_t        if_get_ipv4_addr(struct iface *);
 222
 223 /* adjacency.c */
 224 struct adj      *adj_new(struct in_addr, struct hello_source *,
 225                     union ldpd_addr *);
 226 void             adj_del(struct adj *, uint32_t);
 227 struct adj      *adj_find(struct hello_source *);
 228 int              adj_get_af(struct adj *adj);
 229 void             adj_start_itimer(struct adj *);
 230 void             adj_stop_itimer(struct adj *);
 231 struct tnbr     *tnbr_new(int, union ldpd_addr *);
 232 struct tnbr     *tnbr_find(struct ldpd_conf *, int, union ldpd_addr *);
 233 struct tnbr     *tnbr_check(struct ldpd_conf *, struct tnbr *);
 234 void             tnbr_update(struct tnbr *);
 235 void             tnbr_update_all(int);
 236 uint16_t         tnbr_get_hello_holdtime(struct tnbr *);
 237 uint16_t         tnbr_get_hello_interval(struct tnbr *);
 238 struct ctl_adj  *adj_to_ctl(struct adj *);
 239
 240 /* neighbor.c */
 241 int                      nbr_fsm(struct nbr *, enum nbr_event);
 242 struct nbr              *nbr_new(struct in_addr, int, int, union ldpd_addr *,
 243                             uint32_t);
 244 void                     nbr_del(struct nbr *);
 245 struct nbr              *nbr_find_ldpid(uint32_t);
 246 struct nbr              *nbr_find_addr(int, union ldpd_addr *);
 247 struct nbr              *nbr_find_peerid(uint32_t);
 248 int                      nbr_adj_count(struct nbr *, int);
 249 int                      nbr_session_active_role(struct nbr *);
 250 void                     nbr_stop_ktimer(struct nbr *);
 251 void                     nbr_stop_ktimeout(struct nbr *);
 252 void                     nbr_stop_itimeout(struct nbr *);
 253 void                     nbr_start_idtimer(struct nbr *);
 254 void                     nbr_stop_idtimer(struct nbr *);
 255 int                      nbr_pending_idtimer(struct nbr *);
 256 int                      nbr_pending_connect(struct nbr *);
 257 int                      nbr_establish_connection(struct nbr *);
 258 int                      nbr_gtsm_enabled(struct nbr *, struct nbr_params *);
 259 int                      nbr_gtsm_setup(int, int, struct nbr_params *);
 260 int                      nbr_gtsm_check(int, struct nbr *, struct nbr_params *);
 261 struct nbr_params       *nbr_params_new(struct in_addr);
 262 struct nbr_params       *nbr_params_find(struct ldpd_conf *, struct in_addr);
 263 uint16_t                 nbr_get_keepalive(int, struct in_addr);
 264 struct ctl_nbr          *nbr_to_ctl(struct nbr *);
 265 void                     nbr_clear_ctl(struct ctl_nbr *);
 266
 267 /* packet.c */
 268 int                      gen_ldp_hdr(struct ibuf *, uint16_t);
 269 int                      gen_msg_hdr(struct ibuf *, uint16_t, uint16_t);
 270 int                      send_packet(int, int, union ldpd_addr *,
 271                             struct iface_af *, void *, size_t);
 272 int                      disc_recv_packet(struct thread *);
 273 int                      session_accept(struct thread *);
 274 void                     session_accept_nbr(struct nbr *, int);
 275 void                     session_shutdown(struct nbr *, uint32_t, uint32_t,
 276                             uint32_t);
 277 void                     session_close(struct nbr *);
 278 struct tcp_conn         *tcp_new(int, struct nbr *);
 279 void                     pending_conn_del(struct pending_conn *);
 280 struct pending_conn     *pending_conn_find(int, union ldpd_addr *);
 281
 282 char    *pkt_ptr;       /* packet buffer */
 283
 284 /* pfkey.c */
 285 #ifdef __OpenBSD__
 286 int     pfkey_read(int, struct sadb_msg *);
 287 int     pfkey_establish(struct nbr *, struct nbr_params *);
 288 int     pfkey_remove(struct nbr *);
 289 int     pfkey_init(void);
 290 #endif
 291
 292 /* l2vpn.c */
 293 void    ldpe_l2vpn_init(struct l2vpn *);
 294 void    ldpe_l2vpn_exit(struct l2vpn *);
 295 void    ldpe_l2vpn_pw_init(struct l2vpn_pw *);
 296 void    ldpe_l2vpn_pw_exit(struct l2vpn_pw *);
 297
 298 #endif  /* _LDPE_H_ */