usr.sbin/mrouted/defs.h

   1 /*      $NetBSD: defs.h,v 1.13 2003/05/16 22:59:50 dsl Exp $    */
   2
   3 /*
   4  * The mrouted program is covered by the license in the accompanying file
   5  * named "LICENSE".  Use of the mrouted program represents acceptance of
   6  * the terms and conditions listed in that file.
   7  *
   8  * The mrouted program is COPYRIGHT 1989 by The Board of Trustees of
   9  * Leland Stanford Junior University.
  10  */
  11
  12
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 #include <unistd.h>
  16 #include <errno.h>
  17 #include <syslog.h>
  18 #include <signal.h>
  19 #include <string.h>
  20 #include <sys/param.h>
  21 #include <sys/types.h>
  22 #include <sys/socket.h>
  23 #include <sys/ioctl.h>
  24 #ifdef SYSV
  25 #include <sys/sockio.h>
  26 #endif
  27 #include <sys/time.h>
  28 #include <net/if.h>
  29 #include <netinet/in.h>
  30 #include <netinet/in_systm.h>
  31 #include <netinet/ip.h>
  32 #include <netinet/igmp.h>
  33 #include <netinet/ip_mroute.h>
  34 #ifdef RSRR
  35 #include <sys/un.h>
  36 #endif /* RSRR */
  37
  38 typedef void (*cfunc_t)(void *);
  39 typedef void (*ihfunc_t)(int, fd_set *);
  40
  41 #include "dvmrp.h"
  42 #include "vif.h"
  43 #include "route.h"
  44 #include "prune.h"
  45 #include "pathnames.h"
  46 #ifdef RSRR
  47 #include "rsrr.h"
  48 #include "rsrr_var.h"
  49 #endif /* RSRR */
  50
  51 /*
  52  * Miscellaneous constants and macros.
  53  */
  54 #define FALSE           0
  55 #define TRUE            1
  56
  57 #define EQUAL(s1, s2)   (strcmp((s1), (s2)) == 0)
  58
  59 #define TIMER_INTERVAL  ROUTE_MAX_REPORT_DELAY
  60
  61 #define VENDOR_CODE     1   /* Get a new vendor code if you make significant
  62                              * changes to mrouted. */
  63
  64 #define PROTOCOL_VERSION 3  /* increment when packet format/content changes */
  65
  66 #define MROUTED_VERSION  8  /* increment on local changes or bug fixes, */
  67                             /* reset to 0 whever PROTOCOL_VERSION increments */
  68
  69 #define MROUTED_LEVEL  ((MROUTED_VERSION << 8) | PROTOCOL_VERSION | \
  70                         ((NF_PRUNE | NF_GENID | NF_MTRACE) << 16) | \
  71                         (VENDOR_CODE << 24))
  72                             /* for IGMP 'group' field of DVMRP messages */
  73
  74 #define LEAF_FLAGS      (( vifs_with_neighbors == 1 ) ? 0x010000 : 0)
  75                             /* more for IGMP 'group' field of DVMRP messages */
  76 #define DEL_RTE_GROUP           0
  77 #define DEL_ALL_ROUTES          1
  78                             /* for Deleting kernel table entries */
  79
  80 /* obnoxious gcc gives an extraneous warning about this constant... */
  81 #define JAN_1970        2208988800UL    /* 1970 - 1900 in seconds */
  82
  83 #ifdef RSRR
  84 #define BIT_ZERO(X)      ((X) = 0)
  85 #define BIT_SET(X,n)     ((X) |= 1 << (n))
  86 #define BIT_CLR(X,n)     ((X) &= ~(1 << (n)))
  87 #define BIT_TST(X,n)     ((X) & 1 << (n))
  88 #endif /* RSRR */
  89
  90 #ifdef SYSV
  91 #define bcopy(a, b, c)  memcpy(b, a, c)
  92 #define bzero(s, n)     memset((s), 0, (n))
  93 #define setlinebuf(s)   setvbuf(s, NULL, _IOLBF, 0)
  94 #define signal(s,f)     sigset(s,f)
  95 #endif
  96
  97 /*
  98  * External declarations for global variables and functions.
  99  */
 100 #define RECV_BUF_SIZE 8192
 101 extern char             *recv_buf;
 102 extern char             *send_buf;
 103 extern size_t           send_buflen;
 104 extern int              igmp_socket;
 105 #ifdef RSRR
 106 extern int              rsrr_socket;
 107 #endif /* RSRR */
 108 extern u_int32_t        allhosts_group;
 109 extern u_int32_t        allrtrs_group;
 110 extern u_int32_t        dvmrp_group;
 111 extern u_int32_t        dvmrp_genid;
 112
 113 #define DEFAULT_DEBUG  2        /* default if "-d" given without value */
 114
 115 extern int              debug;
 116 extern u_char           pruning;
 117
 118 extern int              routes_changed;
 119 extern int              delay_change_reports;
 120 extern unsigned         nroutes;
 121
 122 extern struct uvif      uvifs[MAXVIFS];
 123 extern vifi_t           numvifs;
 124 extern int              vifs_down;
 125 extern int              udp_socket;
 126 extern int              vifs_with_neighbors;
 127
 128 #if !(defined(BSD) && (BSD >= 199103))
 129 extern int              errno;
 130 extern int              sys_nerr;
 131 extern char *           sys_errlist[];
 132 #endif
 133
 134 #ifdef OLD_KERNEL
 135 #define MRT_INIT        DVMRP_INIT
 136 #define MRT_DONE        DVMRP_DONE
 137 #define MRT_ADD_VIF     DVMRP_ADD_VIF
 138 #define MRT_DEL_VIF     DVMRP_DEL_VIF
 139 #define MRT_ADD_MFC     DVMRP_ADD_MFC
 140 #define MRT_DEL_MFC     DVMRP_DEL_MFC
 141
 142 #define IGMP_PIM        0x14
 143 #endif
 144
 145 /* main.c */
 146 extern void             logit(int, int, const char *, ...)
 147         __attribute__((__format__(__printf__, 3, 4)));
 148 extern int              register_input_handler(int fd, ihfunc_t func);
 149
 150 /* igmp.c */
 151 extern void             init_igmp(void);
 152 extern void             accept_igmp(int recvlen);
 153 extern void             send_igmp(u_int32_t src, u_int32_t dst, int type,
 154                                   int code, u_int32_t group, int datalen);
 155
 156 /* callout.c */
 157 extern void             callout_init(void);
 158 extern void             age_callout_queue(void);
 159 extern int              timer_setTimer(int delay, cfunc_t action, char *data);
 160 extern void             timer_clearTimer(int timer_id);
 161
 162 /* route.c */
 163 extern void             init_routes(void);
 164 extern void             start_route_updates(void);
 165 extern void             update_route(u_int32_t origin, u_int32_t mask,
 166                                      u_int metric, u_int32_t src, vifi_t vifi);
 167 extern void             age_routes(void);
 168 extern void             expire_all_routes(void);
 169 extern void             free_all_routes(void);
 170 extern void             accept_probe(u_int32_t src, u_int32_t dst,
 171                                      char *p, int datalen, u_int32_t level);
 172 extern void             accept_report(u_int32_t src, u_int32_t dst,
 173                                       char *p, int datalen, u_int32_t level);
 174 extern struct rtentry * determine_route(u_int32_t src);
 175 extern void             report(int which_routes, vifi_t vifi, u_int32_t dst);
 176 extern void             report_to_all_neighbors(int which_routes);
 177 extern int              report_next_chunk(void);
 178 extern void             add_vif_to_routes(vifi_t vifi);
 179 extern void             delete_vif_from_routes(vifi_t vifi);
 180 extern void             delete_neighbor_from_routes(u_int32_t addr,
 181                                                     vifi_t vifi);
 182 extern void             dump_routes(FILE *fp);
 183 extern void             start_route_updates(void);
 184
 185 /* vif.c */
 186 extern void             init_vifs(void);
 187 extern void             check_vif_state(void);
 188 extern vifi_t           find_vif(u_int32_t src, u_int32_t dst);
 189 extern void             age_vifs(void);
 190 extern void             dump_vifs(FILE *fp);
 191 extern void             stop_all_vifs(void);
 192 extern struct listaddr *neighbor_info(vifi_t vifi, u_int32_t addr);
 193 extern void             accept_group_report(u_int32_t src, u_int32_t dst,
 194                                             u_int32_t group, int r_type);
 195 extern void             query_groups(void);
 196 extern void             probe_for_neighbors(void);
 197 extern int              update_neighbor(vifi_t vifi, u_int32_t addr,
 198                                         int msgtype, char *p, int datalen,
 199                                         u_int32_t level);
 200 extern void             accept_neighbor_request(u_int32_t src, u_int32_t dst);
 201 extern void             accept_neighbor_request2(u_int32_t src, u_int32_t dst);
 202 extern void             accept_neighbors(u_int32_t src, u_int32_t dst,
 203                                          u_char *p, int datalen,
 204                                          u_int32_t level);
 205 extern void             accept_neighbors2(u_int32_t src, u_int32_t dst,
 206                                           u_char *p, int datalen,
 207                                           u_int32_t level);
 208 extern void             accept_leave_message(u_int32_t src, u_int32_t dst,
 209                                              u_int32_t group);
 210 extern void             accept_membership_query(u_int32_t src, u_int32_t dst,
 211                                                 u_int32_t group, int tmo);
 212
 213 /* config.c */
 214 extern void             config_vifs_from_kernel(void);
 215
 216 /* cfparse.y */
 217 extern void             config_vifs_from_file(void);
 218
 219 /* inet.c */
 220 extern int              inet_valid_host(u_int32_t naddr);
 221 extern int              inet_valid_mask(u_int32_t mask);
 222 extern int              inet_valid_subnet(u_int32_t nsubnet, u_int32_t nmask);
 223 extern char *           inet_fmt(u_int32_t addr);
 224 extern char *           inet_fmts(u_int32_t addr, u_int32_t mask);
 225 extern u_int32_t        inet_parse(char *s, int *);
 226 extern int              inet_cksum(u_short *addr, u_int len);
 227
 228 /* prune.c */
 229 extern unsigned         kroutes;
 230 extern void             add_table_entry(u_int32_t origin, u_int32_t mcastgrp);
 231 extern void             del_table_entry(struct rtentry *r,
 232                                         u_int32_t mcastgrp, u_int del_flag);
 233 extern void             update_table_entry(struct rtentry *r);
 234 extern void             init_ktable(void);
 235 extern void             accept_prune(u_int32_t src, u_int32_t dst, char *p,
 236                                      int datalen);
 237 extern void             steal_sources(struct rtentry *rt);
 238 extern void             reset_neighbor_state(vifi_t vifi, u_int32_t addr);
 239 extern int              grplst_mem(vifi_t vifi, u_int32_t mcastgrp);
 240 extern int              scoped_addr(vifi_t vifi, u_int32_t addr);
 241 extern void             free_all_prunes(void);
 242 extern void             age_table_entry(void);
 243 extern void             dump_cache(FILE *fp2);
 244 extern void             update_lclgrp(vifi_t vifi, u_int32_t mcastgrp);
 245 extern void             delete_lclgrp(vifi_t vifi, u_int32_t mcastgrp);
 246 extern void             chkgrp_graft(vifi_t vifi, u_int32_t mcastgrp);
 247 extern void             accept_graft(u_int32_t src, u_int32_t dst, char *p,
 248                                      int datalen);
 249 extern void             accept_g_ack(u_int32_t src, u_int32_t dst, char *p,
 250                                      int datalen);
 251 /* u_int is promoted u_char */
 252 extern void             accept_mtrace(u_int32_t src, u_int32_t dst,
 253                                       u_int32_t group, char *data, u_int no,
 254                                       int datalen);
 255 extern int              find_src_grp(u_int32_t, u_int32_t, u_int32_t);
 256
 257 /* kern.c */
 258 extern void             k_set_rcvbuf(int bufsize);
 259 extern void             k_hdr_include(int bool);
 260 extern void             k_set_ttl(int t);
 261 extern void             k_set_loop(int l);
 262 extern void             k_set_if(u_int32_t ifa);
 263 extern void             k_join(u_int32_t grp, u_int32_t ifa);
 264 extern void             k_leave(u_int32_t grp, u_int32_t ifa);
 265 extern void             k_init_dvmrp(void);
 266 extern void             k_stop_dvmrp(void);
 267 extern void             k_add_vif(vifi_t vifi, struct uvif *v);
 268 extern void             k_del_vif(vifi_t vifi);
 269 extern void             k_add_rg(u_int32_t origin, struct gtable *g);
 270 extern int              k_del_rg(u_int32_t origin, struct gtable *g);
 271 extern int              k_get_version(void);
 272
 273 #ifdef SNMP
 274 /* prune.c */
 275 extern struct rtentry * snmp_find_route();
 276 extern struct gtable *  find_grp();
 277 extern struct stable *  find_grp_src();
 278 #endif
 279
 280 #ifdef RSRR
 281 /* prune.c */
 282 extern struct gtable    *kernel_table;
 283 extern struct gtable    *gtp;
 284 extern int              find_src_grp(u_int32_t src, u_int32_t mask,
 285                                      u_int32_t grp);
 286
 287 /* rsrr.c */
 288 extern void             rsrr_init(void);
 289 extern void             rsrr_read(int f, fd_set *rfd);
 290 extern void             rsrr_clean(void);
 291 extern void             rsrr_cache_send(struct gtable *gt, int notify);
 292 extern void             rsrr_cache_clean(struct gtable *gt);
 293 #endif /* RSRR */
 294
 295 /* vif.c */
 296 extern void             accept_info_reply(u_int32_t, u_int32_t, u_char *, int);
 297 extern void             accept_info_request(u_int32_t, u_int32_t,
 298                                             u_char *, int);
 299 extern void             init_installvifs(void);