1 /* $NetBSD: defs.h,v 1.16 2020/09/07 18:37:21 christos 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(const void *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); 259 extern void k_hdr_include(int); 260 extern void k_set_ttl(int); 261 extern void k_set_loop(int); 262 extern void k_set_if(u_int32_t); 263 extern void k_join(u_int32_t, u_int32_t); 264 extern void k_leave(u_int32_t, u_int32_t); 265 extern void k_init_dvmrp(void); 266 extern void k_stop_dvmrp(void); 267 extern void k_add_vif(vifi_t, struct uvif *); 268 extern void k_del_vif(vifi_t); 269 extern void k_add_rg(u_int32_t, struct gtable *); 270 extern int k_del_rg(u_int32_t, struct gtable *); 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); 300