/* * The mrouted program is covered by the license in the accompanying file * named "LICENSE". Use of the mrouted program represents acceptance of * the terms and conditions listed in that file. * * The mrouted program is COPYRIGHT 1989 by The Board of Trustees of * Leland Stanford Junior University. * * * $FreeBSD$ */ #include #include #include #include #include #include #include #include #include #include #include #include #ifdef SYSV #include #endif #include #include #define rtentry kern_rtentry /* XXX !!! UGH */ #include #undef rtentry #include #include #include #include #include #ifdef RSRR #include #endif /* RSRR */ /*XXX*/ typedef u_int u_int32; #ifndef __P #ifdef __STDC__ #define __P(x) x #else #define __P(x) () #endif #endif typedef void (*cfunc_t) __P((void *)); typedef void (*ihfunc_t) __P((int, fd_set *)); #include "dvmrp.h" #include "vif.h" #include "route.h" #include "prune.h" #include "pathnames.h" #ifdef RSRR #include "rsrr.h" #include "rsrr_var.h" #endif /* RSRR */ /* * Miscellaneous constants and macros. */ #define FALSE 0 #define TRUE 1 #define EQUAL(s1, s2) (strcmp((s1), (s2)) == 0) #define TIMER_INTERVAL ROUTE_MAX_REPORT_DELAY #define VENDOR_CODE 1 /* Get a new vendor code if you make significant * changes to mrouted. */ #define PROTOCOL_VERSION 3 /* increment when packet format/content changes */ #define MROUTED_VERSION 8 /* increment on local changes or bug fixes, */ /* reset to 0 whever PROTOCOL_VERSION increments */ #define MROUTED_LEVEL ((MROUTED_VERSION << 8) | PROTOCOL_VERSION | \ ((NF_PRUNE | NF_GENID | NF_MTRACE) << 16) | \ (VENDOR_CODE << 24)) /* for IGMP 'group' field of DVMRP messages */ #define LEAF_FLAGS (( vifs_with_neighbors == 1 ) ? 0x010000 : 0) /* more for IGMP 'group' field of DVMRP messages */ #define DEL_RTE_GROUP 0 #define DEL_ALL_ROUTES 1 /* for Deleting kernel table entries */ /* obnoxious gcc gives an extraneous warning about this constant... */ #if defined(__STDC__) || defined(__GNUC__) #define JAN_1970 2208988800UL /* 1970 - 1900 in seconds */ #else #define JAN_1970 2208988800L /* 1970 - 1900 in seconds */ #define const /**/ #endif #ifdef RSRR #define BIT_ZERO(X) ((X) = 0) #define BIT_SET(X,n) ((X) |= 1 << (n)) #define BIT_CLR(X,n) ((X) &= ~(1 << (n))) #define BIT_TST(X,n) ((X) & 1 << (n)) #endif /* RSRR */ #ifdef SYSV #define bcopy(a, b, c) memcpy(b, a, c) #define bzero(s, n) memset((s), 0, (n)) #define setlinebuf(s) setvbuf(s, NULL, _IOLBF, 0) #define signal(s,f) sigset(s,f) #endif /* * External declarations for global variables and functions. */ #define RECV_BUF_SIZE 8192 extern char *recv_buf; extern char *send_buf; extern int igmp_socket; #ifdef RSRR extern int rsrr_socket; #endif /* RSRR */ extern u_int32 allhosts_group; extern u_int32 allrtrs_group; extern u_int32 dvmrp_group; extern u_int32 dvmrp_genid; #define DEFAULT_DEBUG 2 /* default if "-d" given without value */ extern int debug; extern u_char pruning; extern int routes_changed; extern int delay_change_reports; extern unsigned nroutes; extern struct uvif uvifs[MAXVIFS]; extern vifi_t numvifs; extern int vifs_down; extern int udp_socket; extern int vifs_with_neighbors; extern char s1[]; extern char s2[]; extern char s3[]; extern char s4[]; #if !(defined(BSD) && (BSD >= 199103)) extern int errno; extern int sys_nerr; extern char * sys_errlist[]; #endif #ifdef OLD_KERNEL #define MRT_INIT DVMRP_INIT #define MRT_DONE DVMRP_DONE #define MRT_ADD_VIF DVMRP_ADD_VIF #define MRT_DEL_VIF DVMRP_DEL_VIF #define MRT_ADD_MFC DVMRP_ADD_MFC #define MRT_DEL_MFC DVMRP_DEL_MFC #endif #ifndef IGMP_PIM #define IGMP_PIM 0x14 #endif #ifndef IGMP_MEMBERSHIP_QUERY #define IGMP_MEMBERSHIP_QUERY IGMP_HOST_MEMBERSHIP_QUERY #define IGMP_V1_MEMBERSHIP_REPORT IGMP_HOST_MEMBERSHIP_REPORT #define IGMP_V2_MEMBERSHIP_REPORT IGMP_HOST_NEW_MEMBERSHIP_REPORT #define IGMP_V2_LEAVE_GROUP IGMP_HOST_LEAVE_MESSAGE #endif /* main.c */ extern void log __P((int, int, char *, ...)); extern int register_input_handler __P((int fd, ihfunc_t func)); /* igmp.c */ extern void init_igmp __P((void)); extern void accept_igmp __P((int recvlen)); extern void send_igmp __P((u_int32 src, u_int32 dst, int type, int code, u_int32 group, int datalen)); /* callout.c */ extern void callout_init __P((void)); extern void age_callout_queue __P((void)); extern int timer_setTimer __P((int delay, cfunc_t action, char *data)); extern void timer_clearTimer __P((int timer_id)); /* route.c */ extern void init_routes __P((void)); extern void start_route_updates __P((void)); extern void update_route __P((u_int32 origin, u_int32 mask, u_int metric, u_int32 src, vifi_t vifi)); extern void age_routes __P((void)); extern void expire_all_routes __P((void)); extern void free_all_routes __P((void)); extern void accept_probe __P((u_int32 src, u_int32 dst, char *p, int datalen, u_int32 level)); extern void accept_report __P((u_int32 src, u_int32 dst, char *p, int datalen, u_int32 level)); extern struct rtentry * determine_route __P((u_int32 src)); extern void report __P((int which_routes, vifi_t vifi, u_int32 dst)); extern void report_to_all_neighbors __P((int which_routes)); extern int report_next_chunk __P((void)); extern void add_vif_to_routes __P((vifi_t vifi)); extern void delete_vif_from_routes __P((vifi_t vifi)); extern void delete_neighbor_from_routes __P((u_int32 addr, vifi_t vifi)); extern void dump_routes __P((FILE *fp)); extern void start_route_updates __P((void)); /* vif.c */ extern void init_vifs __P((void)); extern void check_vif_state __P((void)); extern vifi_t find_vif __P((u_int32 src, u_int32 dst)); extern void age_vifs __P((void)); extern void dump_vifs __P((FILE *fp)); extern void stop_all_vifs __P((void)); extern struct listaddr *neighbor_info __P((vifi_t vifi, u_int32 addr)); extern void accept_group_report __P((u_int32 src, u_int32 dst, u_int32 group, int r_type)); extern void query_groups __P((void)); extern void probe_for_neighbors __P((void)); extern int update_neighbor __P((vifi_t vifi, u_int32 addr, int msgtype, char *p, int datalen, u_int32 level)); extern void accept_neighbor_request __P((u_int32 src, u_int32 dst)); extern void accept_neighbor_request2 __P((u_int32 src, u_int32 dst)); extern void accept_neighbors __P((u_int32 src, u_int32 dst, u_char *p, int datalen, u_int32 level)); extern void accept_neighbors2 __P((u_int32 src, u_int32 dst, u_char *p, int datalen, u_int32 level)); extern void accept_leave_message __P((u_int32 src, u_int32 dst, u_int32 group)); extern void accept_membership_query __P((u_int32 src, u_int32 dst, u_int32 group, int tmo)); /* config.c */ extern void config_vifs_from_kernel __P((void)); /* cfparse.y */ extern void config_vifs_from_file __P((void)); /* inet.c */ extern int inet_valid_host __P((u_int32 naddr)); extern int inet_valid_subnet __P((u_int32 nsubnet, u_int32 nmask)); extern char * inet_fmt __P((u_int32 addr, char *s)); extern char * inet_fmts __P((u_int32 addr, u_int32 mask, char *s)); extern u_int32 inet_parse __P((char *s, int n)); extern int inet_cksum __P((u_short *addr, u_int len)); /* prune.c */ extern unsigned kroutes; extern void add_table_entry __P((u_int32 origin, u_int32 mcastgrp)); extern void del_table_entry __P((struct rtentry *r, u_int32 mcastgrp, u_int del_flag)); extern void update_table_entry __P((struct rtentry *r)); extern void init_ktable __P((void)); extern void accept_prune __P((u_int32 src, u_int32 dst, char *p, int datalen)); extern void steal_sources __P((struct rtentry *rt)); extern void reset_neighbor_state __P((vifi_t vifi, u_int32 addr)); extern int grplst_mem __P((vifi_t vifi, u_int32 mcastgrp)); extern int scoped_addr __P((vifi_t vifi, u_int32 addr)); extern void free_all_prunes __P((void)); extern void age_table_entry __P((void)); extern void dump_cache __P((FILE *fp2)); extern void update_lclgrp __P((vifi_t vifi, u_int32 mcastgrp)); extern void delete_lclgrp __P((vifi_t vifi, u_int32 mcastgrp)); extern void chkgrp_graft __P((vifi_t vifi, u_int32 mcastgrp)); extern void accept_graft __P((u_int32 src, u_int32 dst, char *p, int datalen)); extern void accept_g_ack __P((u_int32 src, u_int32 dst, char *p, int datalen)); /* u_int is promoted u_char */ extern void accept_mtrace __P((u_int32 src, u_int32 dst, u_int32 group, char *data, u_int no, int datalen)); /* kern.c */ extern void k_set_rcvbuf __P((int bufsize)); extern void k_hdr_include __P((int bool)); extern void k_set_ttl __P((int t)); extern void k_set_loop __P((int l)); extern void k_set_if __P((u_int32 ifa)); extern void k_join __P((u_int32 grp, u_int32 ifa)); extern void k_leave __P((u_int32 grp, u_int32 ifa)); extern void k_init_dvmrp __P((void)); extern void k_stop_dvmrp __P((void)); extern void k_add_vif __P((vifi_t vifi, struct uvif *v)); extern void k_del_vif __P((vifi_t vifi)); extern void k_add_rg __P((u_int32 origin, struct gtable *g)); extern int k_del_rg __P((u_int32 origin, struct gtable *g)); extern int k_get_version __P((void)); #ifdef SNMP /* prune.c */ extern struct rtentry * snmp_find_route __P(()); extern struct gtable * find_grp __P(()); extern struct stable * find_grp_src __P(()); #endif #ifdef RSRR /* prune.c */ extern struct gtable *kernel_table; extern struct gtable *gtp; extern int find_src_grp __P((u_int32 src, u_int32 mask, u_int32 grp)); /* rsrr.c */ extern void rsrr_init __P((void)); extern void rsrr_read __P((int f, fd_set *rfd)); extern void rsrr_clean __P((void)); extern void rsrr_cache_send __P((struct gtable *gt, int notify)); extern void rsrr_cache_clean __P((struct gtable *gt)); #endif /* RSRR */