/*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1983, 1989, 1991, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static const char copyright[] = "@(#) Copyright (c) 1983, 1989, 1991, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)route.c 8.6 (Berkeley) 4/28/95"; #endif #endif /* not lint */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct fibl { TAILQ_ENTRY(fibl) fl_next; int fl_num; int fl_error; int fl_errno; }; static struct keytab { const char *kt_cp; int kt_i; } const keywords[] = { #include "keywords.h" {0, 0} }; static struct sockaddr_storage so[RTAX_MAX]; static int pid, rtm_addrs; static int s; static int nflag, af, qflag, tflag; static int verbose, aflen; static int locking, lockrest, debugonly; static struct rt_metrics rt_metrics; static u_long rtm_inits; static uid_t uid; static int defaultfib; static int numfibs; static char domain[MAXHOSTNAMELEN + 1]; static bool domain_initialized; static int rtm_seq; static char rt_line[NI_MAXHOST]; static char net_line[MAXHOSTNAMELEN + 1]; static struct { struct rt_msghdr m_rtm; char m_space[512]; } m_rtmsg; static TAILQ_HEAD(fibl_head_t, fibl) fibl_head; static void printb(int, const char *); static void flushroutes(int argc, char *argv[]); static int flushroutes_fib(int); static int getaddr(int, char *, int); static int keyword(const char *); #ifdef INET static void inet_makemask(struct sockaddr_in *, u_long); #endif #ifdef INET6 static int inet6_makenetandmask(struct sockaddr_in6 *, const char *); #endif static void interfaces(void); static void monitor(int, char*[]); static const char *netname(struct sockaddr *); static void newroute(int, char **); static int newroute_fib(int, char *, int); static void pmsg_addrs(char *, int, size_t); static void pmsg_common(struct rt_msghdr *, size_t); static int prefixlen(const char *); static void print_getmsg(struct rt_msghdr *, int, int); static void print_rtmsg(struct rt_msghdr *, size_t); static const char *routename(struct sockaddr *); static int rtmsg(int, int, int); static void set_metric(char *, int); static int set_sofib(int); static void sockaddr(char *, struct sockaddr *, size_t); static void sodump(struct sockaddr *, const char *); static int fiboptlist_csv(const char *, struct fibl_head_t *); static int fiboptlist_range(const char *, struct fibl_head_t *); static void usage(const char *) __dead2; #define READ_TIMEOUT 10 static volatile sig_atomic_t stop_read; static void stopit(int sig __unused) { stop_read = 1; } static void usage(const char *cp) { if (cp != NULL) warnx("bad keyword: %s", cp); errx(EX_USAGE, "usage: route [-46dnqtv] command [[modifiers] args]"); /* NOTREACHED */ } int main(int argc, char **argv) { int ch; size_t len; if (argc < 2) usage(NULL); while ((ch = getopt(argc, argv, "46nqdtv")) != -1) switch(ch) { case '4': #ifdef INET af = AF_INET; aflen = sizeof(struct sockaddr_in); #else errx(1, "IPv4 support is not compiled in"); #endif break; case '6': #ifdef INET6 af = AF_INET6; aflen = sizeof(struct sockaddr_in6); #else errx(1, "IPv6 support is not compiled in"); #endif break; case 'n': nflag = 1; break; case 'q': qflag = 1; break; case 'v': verbose = 1; break; case 't': tflag = 1; break; case 'd': debugonly = 1; break; case '?': default: usage(NULL); } argc -= optind; argv += optind; pid = getpid(); uid = geteuid(); if (tflag) s = open(_PATH_DEVNULL, O_WRONLY, 0); else s = socket(PF_ROUTE, SOCK_RAW, 0); if (s < 0) err(EX_OSERR, "socket"); len = sizeof(numfibs); if (sysctlbyname("net.fibs", (void *)&numfibs, &len, NULL, 0) == -1) numfibs = -1; len = sizeof(defaultfib); if (numfibs != -1 && sysctlbyname("net.my_fibnum", (void *)&defaultfib, &len, NULL, 0) == -1) defaultfib = -1; if (*argv != NULL) switch (keyword(*argv)) { case K_GET: case K_SHOW: uid = 0; /* FALLTHROUGH */ case K_CHANGE: case K_ADD: case K_DEL: case K_DELETE: newroute(argc, argv); /* NOTREACHED */ case K_MONITOR: monitor(argc, argv); /* NOTREACHED */ case K_FLUSH: flushroutes(argc, argv); exit(0); /* NOTREACHED */ } usage(*argv); /* NOTREACHED */ } static int set_sofib(int fib) { if (fib < 0) return (0); return (setsockopt(s, SOL_SOCKET, SO_SETFIB, (void *)&fib, sizeof(fib))); } static int fiboptlist_range(const char *arg, struct fibl_head_t *flh) { struct fibl *fl; char *str0, *str, *token, *endptr; int fib[2], i, error; str0 = str = strdup(arg); error = 0; i = 0; while ((token = strsep(&str, "-")) != NULL) { switch (i) { case 0: case 1: errno = 0; fib[i] = strtol(token, &endptr, 0); if (errno == 0) { if (*endptr != '\0' || fib[i] < 0 || (numfibs != -1 && fib[i] > numfibs - 1)) errno = EINVAL; } if (errno) error = 1; break; default: error = 1; } if (error) goto fiboptlist_range_ret; i++; } if (fib[0] >= fib[1]) { error = 1; goto fiboptlist_range_ret; } for (i = fib[0]; i <= fib[1]; i++) { fl = calloc(1, sizeof(*fl)); if (fl == NULL) { error = 1; goto fiboptlist_range_ret; } fl->fl_num = i; TAILQ_INSERT_TAIL(flh, fl, fl_next); } fiboptlist_range_ret: free(str0); return (error); } #define ALLSTRLEN 64 static int fiboptlist_csv(const char *arg, struct fibl_head_t *flh) { struct fibl *fl; char *str0, *str, *token, *endptr; int fib, error; str0 = str = NULL; if (strcmp("all", arg) == 0) { str = calloc(1, ALLSTRLEN); if (str == NULL) { error = 1; goto fiboptlist_csv_ret; } if (numfibs > 1) snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1); else snprintf(str, ALLSTRLEN - 1, "%d", 0); } else if (strcmp("default", arg) == 0) { str0 = str = calloc(1, ALLSTRLEN); if (str == NULL) { error = 1; goto fiboptlist_csv_ret; } snprintf(str, ALLSTRLEN - 1, "%d", defaultfib); } else str0 = str = strdup(arg); error = 0; while ((token = strsep(&str, ",")) != NULL) { if (*token != '-' && strchr(token, '-') != NULL) { error = fiboptlist_range(token, flh); if (error) goto fiboptlist_csv_ret; } else { errno = 0; fib = strtol(token, &endptr, 0); if (errno == 0) { if (*endptr != '\0' || fib < 0 || (numfibs != -1 && fib > numfibs - 1)) errno = EINVAL; } if (errno) { error = 1; goto fiboptlist_csv_ret; } fl = calloc(1, sizeof(*fl)); if (fl == NULL) { error = 1; goto fiboptlist_csv_ret; } fl->fl_num = fib; TAILQ_INSERT_TAIL(flh, fl, fl_next); } } fiboptlist_csv_ret: if (str0 != NULL) free(str0); return (error); } /* * Purge all entries in the routing tables not * associated with network interfaces. */ static void flushroutes(int argc, char *argv[]) { struct fibl *fl; int error; if (uid != 0 && !debugonly && !tflag) errx(EX_NOPERM, "must be root to alter routing table"); shutdown(s, SHUT_RD); /* Don't want to read back our messages */ TAILQ_INIT(&fibl_head); while (argc > 1) { argc--; argv++; if (**argv != '-') usage(*argv); switch (keyword(*argv + 1)) { #ifdef INET case K_4: case K_INET: af = AF_INET; break; #endif #ifdef INET6 case K_6: case K_INET6: af = AF_INET6; break; #endif case K_LINK: af = AF_LINK; break; case K_FIB: if (!--argc) usage(*argv); error = fiboptlist_csv(*++argv, &fibl_head); if (error) errx(EX_USAGE, "invalid fib number: %s", *argv); break; default: usage(*argv); } } if (TAILQ_EMPTY(&fibl_head)) { error = fiboptlist_csv("default", &fibl_head); if (error) errx(EX_OSERR, "fiboptlist_csv failed."); } TAILQ_FOREACH(fl, &fibl_head, fl_next) flushroutes_fib(fl->fl_num); } static int flushroutes_fib(int fib) { struct rt_msghdr *rtm; size_t needed; char *buf, *next, *lim; int mib[7], rlen, seqno, count = 0; int error; error = set_sofib(fib); if (error) { warn("fib number %d is ignored", fib); return (error); } retry: mib[0] = CTL_NET; mib[1] = PF_ROUTE; mib[2] = 0; /* protocol */ mib[3] = AF_UNSPEC; mib[4] = NET_RT_DUMP; mib[5] = 0; /* no flags */ mib[6] = fib; if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) err(EX_OSERR, "route-sysctl-estimate"); if ((buf = malloc(needed)) == NULL) errx(EX_OSERR, "malloc failed"); if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { if (errno == ENOMEM && count++ < 10) { warnx("Routing table grew, retrying"); sleep(1); free(buf); goto retry; } err(EX_OSERR, "route-sysctl-get"); } lim = buf + needed; if (verbose) (void)printf("Examining routing table from sysctl\n"); seqno = 0; /* ??? */ for (next = buf; next < lim; next += rtm->rtm_msglen) { rtm = (struct rt_msghdr *)(void *)next; if (verbose) print_rtmsg(rtm, rtm->rtm_msglen); if ((rtm->rtm_flags & RTF_GATEWAY) == 0) continue; if (af != 0) { struct sockaddr *sa = (struct sockaddr *)(rtm + 1); if (sa->sa_family != af) continue; } if (debugonly) continue; rtm->rtm_type = RTM_DELETE; rtm->rtm_seq = seqno; rlen = write(s, next, rtm->rtm_msglen); if (rlen < 0 && errno == EPERM) err(1, "write to routing socket"); if (rlen < (int)rtm->rtm_msglen) { warn("write to routing socket"); (void)printf("got only %d for rlen\n", rlen); free(buf); goto retry; break; } seqno++; if (qflag) continue; if (verbose) print_rtmsg(rtm, rlen); else { struct sockaddr *sa = (struct sockaddr *)(rtm + 1); printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? routename(sa) : netname(sa)); sa = (struct sockaddr *)(SA_SIZE(sa) + (char *)sa); printf("%-20.20s ", routename(sa)); if (fib >= 0) printf("-fib %-3d ", fib); printf("done\n"); } } free(buf); return (error); } static const char * routename(struct sockaddr *sa) { struct sockaddr_dl *sdl; const char *cp; int n; if (!domain_initialized) { domain_initialized = true; if (gethostname(domain, MAXHOSTNAMELEN) == 0 && (cp = strchr(domain, '.'))) { domain[MAXHOSTNAMELEN] = '\0'; (void)strcpy(domain, cp + 1); } else domain[0] = '\0'; } /* If the address is zero-filled, use "default". */ if (sa->sa_len == 0 && nflag == 0) return ("default"); #if defined(INET) || defined(INET6) switch (sa->sa_family) { #ifdef INET case AF_INET: /* If the address is zero-filled, use "default". */ if (nflag == 0 && ((struct sockaddr_in *)(void *)sa)->sin_addr.s_addr == INADDR_ANY) return("default"); break; #endif #ifdef INET6 case AF_INET6: /* If the address is zero-filled, use "default". */ if (nflag == 0 && IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(void *)sa)->sin6_addr)) return("default"); break; #endif } #endif switch (sa->sa_family) { #if defined(INET) || defined(INET6) #ifdef INET case AF_INET: #endif #ifdef INET6 case AF_INET6: #endif { struct sockaddr_storage ss; int error; char *p; memset(&ss, 0, sizeof(ss)); if (sa->sa_len == 0) ss.ss_family = sa->sa_family; else memcpy(&ss, sa, sa->sa_len); /* Expand sa->sa_len because it could be shortened. */ if (sa->sa_family == AF_INET) ss.ss_len = sizeof(struct sockaddr_in); else if (sa->sa_family == AF_INET6) ss.ss_len = sizeof(struct sockaddr_in6); error = getnameinfo((struct sockaddr *)&ss, ss.ss_len, rt_line, sizeof(rt_line), NULL, 0, (nflag == 0) ? 0 : NI_NUMERICHOST); if (error) { warnx("getnameinfo(): %s", gai_strerror(error)); strncpy(rt_line, "invalid", sizeof(rt_line)); } /* Remove the domain part if any. */ p = strchr(rt_line, '.'); if (p != NULL && strcmp(p + 1, domain) == 0) *p = '\0'; return (rt_line); break; } #endif case AF_LINK: sdl = (struct sockaddr_dl *)(void *)sa; if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 && sdl->sdl_slen == 0) { n = snprintf(rt_line, sizeof(rt_line), "link#%d", sdl->sdl_index); if (n > (int)sizeof(rt_line)) rt_line[0] = '\0'; return (rt_line); } else return (link_ntoa(sdl)); break; default: { u_short *sp = (u_short *)(void *)sa; u_short *splim = sp + ((sa->sa_len + 1) >> 1); char *cps = rt_line + sprintf(rt_line, "(%d)", sa->sa_family); char *cpe = rt_line + sizeof(rt_line); while (++sp < splim && cps < cpe) /* start with sa->sa_data */ if ((n = snprintf(cps, cpe - cps, " %x", *sp)) > 0) cps += n; else *cps = '\0'; break; } } return (rt_line); } /* * Return the name of the network whose address is given. * The address is assumed to be that of a net, not a host. */ static const char * netname(struct sockaddr *sa) { struct sockaddr_dl *sdl; int n; #ifdef INET struct netent *np = NULL; const char *cp = NULL; u_long i; #endif switch (sa->sa_family) { #ifdef INET case AF_INET: { struct in_addr in; in = ((struct sockaddr_in *)(void *)sa)->sin_addr; i = in.s_addr = ntohl(in.s_addr); if (in.s_addr == 0) cp = "default"; else if (!nflag) { np = getnetbyaddr(i, AF_INET); if (np != NULL) cp = np->n_name; } #define C(x) (unsigned)((x) & 0xff) if (cp != NULL) strncpy(net_line, cp, sizeof(net_line)); else if ((in.s_addr & 0xffffff) == 0) (void)sprintf(net_line, "%u", C(in.s_addr >> 24)); else if ((in.s_addr & 0xffff) == 0) (void)sprintf(net_line, "%u.%u", C(in.s_addr >> 24), C(in.s_addr >> 16)); else if ((in.s_addr & 0xff) == 0) (void)sprintf(net_line, "%u.%u.%u", C(in.s_addr >> 24), C(in.s_addr >> 16), C(in.s_addr >> 8)); else (void)sprintf(net_line, "%u.%u.%u.%u", C(in.s_addr >> 24), C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr)); #undef C break; } #endif #ifdef INET6 case AF_INET6: { struct sockaddr_in6 sin6; int niflags = 0; memset(&sin6, 0, sizeof(sin6)); memcpy(&sin6, sa, sa->sa_len); sin6.sin6_len = sizeof(sin6); sin6.sin6_family = AF_INET6; if (nflag) niflags |= NI_NUMERICHOST; if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, net_line, sizeof(net_line), NULL, 0, niflags) != 0) strncpy(net_line, "invalid", sizeof(net_line)); return(net_line); } #endif case AF_LINK: sdl = (struct sockaddr_dl *)(void *)sa; if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 && sdl->sdl_slen == 0) { n = snprintf(net_line, sizeof(net_line), "link#%d", sdl->sdl_index); if (n > (int)sizeof(net_line)) net_line[0] = '\0'; return (net_line); } else return (link_ntoa(sdl)); break; default: { u_short *sp = (u_short *)(void *)sa->sa_data; u_short *splim = sp + ((sa->sa_len + 1)>>1); char *cps = net_line + sprintf(net_line, "af %d:", sa->sa_family); char *cpe = net_line + sizeof(net_line); while (sp < splim && cps < cpe) if ((n = snprintf(cps, cpe - cps, " %x", *sp++)) > 0) cps += n; else *cps = '\0'; break; } } return (net_line); } static void set_metric(char *value, int key) { int flag = 0; char *endptr; u_long noval, *valp = &noval; switch (key) { #define caseof(x, y, z) case x: valp = &rt_metrics.z; flag = y; break caseof(K_MTU, RTV_MTU, rmx_mtu); caseof(K_HOPCOUNT, RTV_HOPCOUNT, rmx_hopcount); caseof(K_EXPIRE, RTV_EXPIRE, rmx_expire); caseof(K_RECVPIPE, RTV_RPIPE, rmx_recvpipe); caseof(K_SENDPIPE, RTV_SPIPE, rmx_sendpipe); caseof(K_SSTHRESH, RTV_SSTHRESH, rmx_ssthresh); caseof(K_RTT, RTV_RTT, rmx_rtt); caseof(K_RTTVAR, RTV_RTTVAR, rmx_rttvar); caseof(K_WEIGHT, RTV_WEIGHT, rmx_weight); } rtm_inits |= flag; if (lockrest || locking) rt_metrics.rmx_locks |= flag; if (locking) locking = 0; errno = 0; *valp = strtol(value, &endptr, 0); if (errno == 0 && *endptr != '\0') errno = EINVAL; if (errno) err(EX_USAGE, "%s", value); if (flag & RTV_EXPIRE && (value[0] == '+' || value[0] == '-')) { struct timespec ts; clock_gettime(CLOCK_REALTIME_FAST, &ts); *valp += ts.tv_sec; } } #define F_ISHOST 0x01 #define F_FORCENET 0x02 #define F_FORCEHOST 0x04 #define F_PROXY 0x08 #define F_INTERFACE 0x10 static void newroute(int argc, char **argv) { struct sigaction sa; struct fibl *fl; char *cmd; const char *dest, *gateway, *errmsg; int key, error, flags, nrflags, fibnum; if (uid != 0 && !debugonly && !tflag) errx(EX_NOPERM, "must be root to alter routing table"); dest = NULL; gateway = NULL; flags = RTF_STATIC; nrflags = 0; TAILQ_INIT(&fibl_head); sigemptyset(&sa.sa_mask); sa.sa_flags = 0; sa.sa_handler = stopit; if (sigaction(SIGALRM, &sa, 0) == -1) warn("sigaction SIGALRM"); cmd = argv[0]; if (*cmd != 'g' && *cmd != 's') shutdown(s, SHUT_RD); /* Don't want to read back our messages */ while (--argc > 0) { if (**(++argv)== '-') { switch (key = keyword(1 + *argv)) { case K_LINK: af = AF_LINK; aflen = sizeof(struct sockaddr_dl); break; #ifdef INET case K_4: case K_INET: af = AF_INET; aflen = sizeof(struct sockaddr_in); break; #endif #ifdef INET6 case K_6: case K_INET6: af = AF_INET6; aflen = sizeof(struct sockaddr_in6); break; #endif case K_SA: af = PF_ROUTE; aflen = sizeof(struct sockaddr_storage); break; case K_IFACE: case K_INTERFACE: nrflags |= F_INTERFACE; break; case K_NOSTATIC: flags &= ~RTF_STATIC; break; case K_LOCK: locking = 1; break; case K_LOCKREST: lockrest = 1; break; case K_HOST: nrflags |= F_FORCEHOST; break; case K_REJECT: flags |= RTF_REJECT; break; case K_BLACKHOLE: flags |= RTF_BLACKHOLE; break; case K_PROTO1: flags |= RTF_PROTO1; break; case K_PROTO2: flags |= RTF_PROTO2; break; case K_PROXY: nrflags |= F_PROXY; break; case K_XRESOLVE: flags |= RTF_XRESOLVE; break; case K_STATIC: flags |= RTF_STATIC; break; case K_STICKY: flags |= RTF_STICKY; break; case K_NOSTICK: flags &= ~RTF_STICKY; break; case K_FIB: if (!--argc) usage(NULL); error = fiboptlist_csv(*++argv, &fibl_head); if (error) errx(EX_USAGE, "invalid fib number: %s", *argv); break; case K_IFA: if (!--argc) usage(NULL); getaddr(RTAX_IFA, *++argv, nrflags); break; case K_IFP: if (!--argc) usage(NULL); getaddr(RTAX_IFP, *++argv, nrflags); break; case K_GENMASK: if (!--argc) usage(NULL); getaddr(RTAX_GENMASK, *++argv, nrflags); break; case K_GATEWAY: if (!--argc) usage(NULL); getaddr(RTAX_GATEWAY, *++argv, nrflags); gateway = *argv; break; case K_DST: if (!--argc) usage(NULL); if (getaddr(RTAX_DST, *++argv, nrflags)) nrflags |= F_ISHOST; dest = *argv; break; case K_NETMASK: if (!--argc) usage(NULL); getaddr(RTAX_NETMASK, *++argv, nrflags); /* FALLTHROUGH */ case K_NET: nrflags |= F_FORCENET; break; case K_PREFIXLEN: if (!--argc) usage(NULL); if (prefixlen(*++argv) == -1) { nrflags &= ~F_FORCENET; nrflags |= F_ISHOST; } else { nrflags |= F_FORCENET; nrflags &= ~F_ISHOST; } break; case K_MTU: case K_HOPCOUNT: case K_EXPIRE: case K_RECVPIPE: case K_SENDPIPE: case K_SSTHRESH: case K_RTT: case K_RTTVAR: case K_WEIGHT: if (!--argc) usage(NULL); set_metric(*++argv, key); break; default: usage(1+*argv); } } else { if ((rtm_addrs & RTA_DST) == 0) { dest = *argv; if (getaddr(RTAX_DST, *argv, nrflags)) nrflags |= F_ISHOST; } else if ((rtm_addrs & RTA_GATEWAY) == 0) { gateway = *argv; getaddr(RTAX_GATEWAY, *argv, nrflags); } else { getaddr(RTAX_NETMASK, *argv, nrflags); nrflags |= F_FORCENET; } } } /* Do some sanity checks on resulting request */ if (so[RTAX_DST].ss_len == 0) { warnx("destination parameter required"); usage(NULL); } if (so[RTAX_NETMASK].ss_len != 0 && so[RTAX_DST].ss_family != so[RTAX_NETMASK].ss_family) { warnx("destination and netmask family need to be the same"); usage(NULL); } if (nrflags & F_FORCEHOST) { nrflags |= F_ISHOST; #ifdef INET6 if (af == AF_INET6) { rtm_addrs &= ~RTA_NETMASK; memset(&so[RTAX_NETMASK], 0, sizeof(so[RTAX_NETMASK])); } #endif } if (nrflags & F_FORCENET) nrflags &= ~F_ISHOST; flags |= RTF_UP; if (nrflags & F_ISHOST) flags |= RTF_HOST; if ((nrflags & F_INTERFACE) == 0) flags |= RTF_GATEWAY; if (nrflags & F_PROXY) flags |= RTF_ANNOUNCE; if (dest == NULL) dest = ""; if (gateway == NULL) gateway = ""; if (TAILQ_EMPTY(&fibl_head)) { error = fiboptlist_csv("default", &fibl_head); if (error) errx(EX_OSERR, "fiboptlist_csv failed."); } error = 0; TAILQ_FOREACH(fl, &fibl_head, fl_next) { fl->fl_error = newroute_fib(fl->fl_num, cmd, flags); if (fl->fl_error) fl->fl_errno = errno; error += fl->fl_error; } if (*cmd == 'g' || *cmd == 's') exit(error); error = 0; if (!qflag) { fibnum = 0; TAILQ_FOREACH(fl, &fibl_head, fl_next) { if (fl->fl_error == 0) fibnum++; } if (fibnum > 0) { int firstfib = 1; printf("%s %s %s", cmd, (nrflags & F_ISHOST) ? "host" : "net", dest); if (*gateway) printf(": gateway %s", gateway); if (numfibs > 1) { TAILQ_FOREACH(fl, &fibl_head, fl_next) { if (fl->fl_error == 0 && fl->fl_num >= 0) { if (firstfib) { printf(" fib "); firstfib = 0; } printf("%d", fl->fl_num); if (fibnum-- > 1) printf(","); } } } printf("\n"); } } fibnum = 0; TAILQ_FOREACH(fl, &fibl_head, fl_next) { if (fl->fl_error != 0) { error = 1; if (!qflag) { printf("%s %s %s", cmd, (nrflags & F_ISHOST) ? "host" : "net", dest); if (*gateway) printf(": gateway %s", gateway); if (fl->fl_num >= 0) printf(" fib %d", fl->fl_num); switch (fl->fl_errno) { case ESRCH: errmsg = "not in table"; break; case EBUSY: errmsg = "entry in use"; break; case ENOBUFS: errmsg = "not enough memory"; break; case EADDRINUSE: /* * handle recursion avoidance * in rt_setgate() */ errmsg = "gateway uses the same route"; break; case EEXIST: errmsg = "route already in table"; break; default: errmsg = strerror(fl->fl_errno); break; } printf(": %s\n", errmsg); } } } exit(error); } static int newroute_fib(int fib, char *cmd, int flags) { int error; error = set_sofib(fib); if (error) { warn("fib number %d is ignored", fib); return (error); } error = rtmsg(*cmd, flags, fib); return (error); } #ifdef INET static void inet_makemask(struct sockaddr_in *sin_mask, u_long bits) { u_long mask = 0; rtm_addrs |= RTA_NETMASK; if (bits != 0) mask = 0xffffffff << (32 - bits); sin_mask->sin_addr.s_addr = htonl(mask); sin_mask->sin_len = sizeof(struct sockaddr_in); sin_mask->sin_family = AF_INET; } #endif #ifdef INET6 /* * XXX the function may need more improvement... */ static int inet6_makenetandmask(struct sockaddr_in6 *sin6, const char *plen) { if (plen == NULL) { if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) && sin6->sin6_scope_id == 0) plen = "0"; } if (plen == NULL || strcmp(plen, "128") == 0) return (1); rtm_addrs |= RTA_NETMASK; prefixlen(plen); return (0); } #endif /* * Interpret an argument as a network address of some kind, * returning 1 if a host address, 0 if a network address. */ static int getaddr(int idx, char *str, int nrflags) { struct sockaddr *sa; #if defined(INET) struct sockaddr_in *sin; struct hostent *hp; char *q; #elif defined(INET6) char *q; #endif if (idx < 0 || idx >= RTAX_MAX) usage("internal error"); if (af == 0) { #if defined(INET) af = AF_INET; aflen = sizeof(struct sockaddr_in); #elif defined(INET6) af = AF_INET6; aflen = sizeof(struct sockaddr_in6); #else af = AF_LINK; aflen = sizeof(struct sockaddr_dl); #endif } rtm_addrs |= (1 << idx); sa = (struct sockaddr *)&so[idx]; sa->sa_family = af; sa->sa_len = aflen; switch (idx) { case RTAX_GATEWAY: if (nrflags & F_INTERFACE) { struct ifaddrs *ifap, *ifa; struct sockaddr_dl *sdl0 = (struct sockaddr_dl *)(void *)sa; struct sockaddr_dl *sdl = NULL; if (getifaddrs(&ifap)) err(EX_OSERR, "getifaddrs"); for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) { if (ifa->ifa_addr->sa_family != AF_LINK) continue; if (strcmp(str, ifa->ifa_name) != 0) continue; sdl = (struct sockaddr_dl *)(void *)ifa->ifa_addr; } /* If we found it, then use it */ if (sdl != NULL) { /* * Note that we need to copy before calling * freeifaddrs(). */ memcpy(sdl0, sdl, sdl->sdl_len); } freeifaddrs(ifap); if (sdl != NULL) return(1); else errx(EX_DATAERR, "interface '%s' does not exist", str); } break; case RTAX_IFP: sa->sa_family = AF_LINK; break; } if (strcmp(str, "default") == 0) { /* * Default is net 0.0.0.0/0 */ switch (idx) { case RTAX_DST: nrflags |= F_FORCENET; getaddr(RTAX_NETMASK, str, nrflags); break; } return (0); } switch (sa->sa_family) { #ifdef INET6 case AF_INET6: { struct addrinfo hints, *res; int ecode; q = NULL; if (idx == RTAX_DST && (q = strchr(str, '/')) != NULL) *q = '\0'; memset(&hints, 0, sizeof(hints)); hints.ai_family = sa->sa_family; hints.ai_socktype = SOCK_DGRAM; ecode = getaddrinfo(str, NULL, &hints, &res); if (ecode != 0 || res->ai_family != AF_INET6 || res->ai_addrlen != sizeof(struct sockaddr_in6)) errx(EX_OSERR, "%s: %s", str, gai_strerror(ecode)); memcpy(sa, res->ai_addr, res->ai_addrlen); freeaddrinfo(res); if (q != NULL) *q++ = '/'; if (idx == RTAX_DST) return (inet6_makenetandmask((struct sockaddr_in6 *)(void *)sa, q)); return (0); } #endif /* INET6 */ case AF_LINK: link_addr(str, (struct sockaddr_dl *)(void *)sa); return (1); case PF_ROUTE: sockaddr(str, sa, sizeof(struct sockaddr_storage)); return (1); #ifdef INET case AF_INET: #endif default: break; } #ifdef INET sin = (struct sockaddr_in *)(void *)sa; q = strchr(str,'/'); if (q != NULL && idx == RTAX_DST) { /* A.B.C.D/NUM */ *q = '\0'; if (inet_aton(str, &sin->sin_addr) == 0) errx(EX_NOHOST, "bad address: %s", str); int masklen = strtol(q + 1, NULL, 10); if (masklen < 0 || masklen > 32) errx(EX_NOHOST, "bad mask length: %s", q + 1); inet_makemask((struct sockaddr_in *)&so[RTAX_NETMASK],masklen); return (0); } if (inet_aton(str, &sin->sin_addr) != 0) return (1); hp = gethostbyname(str); if (hp != NULL) { sin->sin_family = hp->h_addrtype; memmove((char *)&sin->sin_addr, hp->h_addr, MIN((size_t)hp->h_length, sizeof(sin->sin_addr))); return (1); } #endif errx(EX_NOHOST, "bad address: %s", str); } static int prefixlen(const char *str) { int len = atoi(str), q, r; int max; char *p; rtm_addrs |= RTA_NETMASK; switch (af) { #ifdef INET6 case AF_INET6: { struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&so[RTAX_NETMASK]; max = 128; p = (char *)&sin6->sin6_addr; sin6->sin6_family = AF_INET6; sin6->sin6_len = sizeof(*sin6); break; } #endif #ifdef INET case AF_INET: { struct sockaddr_in *sin = (struct sockaddr_in *)&so[RTAX_NETMASK]; max = 32; p = (char *)&sin->sin_addr; sin->sin_family = AF_INET; sin->sin_len = sizeof(*sin); break; } #endif default: errx(EX_OSERR, "prefixlen not supported in this af"); } if (len < 0 || max < len) errx(EX_USAGE, "%s: invalid prefixlen", str); q = len >> 3; r = len & 7; memset((void *)p, 0, max / 8); if (q > 0) memset((void *)p, 0xff, q); if (r > 0) *((u_char *)p + q) = (0xff00 >> r) & 0xff; if (len == max) return (-1); else return (len); } static void interfaces(void) { size_t needed; int mib[6]; char *buf, *lim, *next, count = 0; struct rt_msghdr *rtm; retry2: mib[0] = CTL_NET; mib[1] = PF_ROUTE; mib[2] = 0; /* protocol */ mib[3] = AF_UNSPEC; mib[4] = NET_RT_IFLIST; mib[5] = 0; /* no flags */ if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) err(EX_OSERR, "route-sysctl-estimate"); if ((buf = malloc(needed)) == NULL) errx(EX_OSERR, "malloc failed"); if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) { if (errno == ENOMEM && count++ < 10) { warnx("Routing table grew, retrying"); sleep(1); free(buf); goto retry2; } err(EX_OSERR, "actual retrieval of interface table"); } lim = buf + needed; for (next = buf; next < lim; next += rtm->rtm_msglen) { rtm = (struct rt_msghdr *)(void *)next; print_rtmsg(rtm, rtm->rtm_msglen); } free(buf); } static void monitor(int argc, char *argv[]) { int n, fib, error; char msg[2048], *endptr; fib = defaultfib; while (argc > 1) { argc--; argv++; if (**argv != '-') usage(*argv); switch (keyword(*argv + 1)) { case K_FIB: if (!--argc) usage(*argv); errno = 0; fib = strtol(*++argv, &endptr, 0); if (errno == 0) { if (*endptr != '\0' || fib < 0 || (numfibs != -1 && fib > numfibs - 1)) errno = EINVAL; } if (errno) errx(EX_USAGE, "invalid fib number: %s", *argv); break; default: usage(*argv); } } error = set_sofib(fib); if (error) errx(EX_USAGE, "invalid fib number: %d", fib); verbose = 1; if (debugonly) { interfaces(); exit(0); } #ifdef SO_RERROR n = 1; if (setsockopt(s, SOL_SOCKET, SO_RERROR, &n, sizeof(n)) == -1) warn("SO_RERROR"); #endif for (;;) { time_t now; n = read(s, msg, sizeof(msg)); if (n == -1) { warn("read"); continue; } now = time(NULL); (void)printf("\ngot message of size %d on %s", n, ctime(&now)); print_rtmsg((struct rt_msghdr *)(void *)msg, n); } } static int rtmsg(int cmd, int flags, int fib) { int rlen; char *cp = m_rtmsg.m_space; int l; #define NEXTADDR(w, u) \ if (rtm_addrs & (w)) { \ l = SA_SIZE(&(u)); \ memmove(cp, (char *)&(u), l); \ cp += l; \ if (verbose) \ sodump((struct sockaddr *)&(u), #w); \ } errno = 0; memset(&m_rtmsg, 0, sizeof(m_rtmsg)); if (cmd == 'a') cmd = RTM_ADD; else if (cmd == 'c') cmd = RTM_CHANGE; else if (cmd == 'g' || cmd == 's') { cmd = RTM_GET; if (so[RTAX_IFP].ss_family == 0) { so[RTAX_IFP].ss_family = AF_LINK; so[RTAX_IFP].ss_len = sizeof(struct sockaddr_dl); rtm_addrs |= RTA_IFP; } } else { cmd = RTM_DELETE; flags |= RTF_PINNED; } #define rtm m_rtmsg.m_rtm rtm.rtm_type = cmd; rtm.rtm_flags = flags; rtm.rtm_version = RTM_VERSION; rtm.rtm_seq = ++rtm_seq; rtm.rtm_addrs = rtm_addrs; rtm.rtm_rmx = rt_metrics; rtm.rtm_inits = rtm_inits; NEXTADDR(RTA_DST, so[RTAX_DST]); NEXTADDR(RTA_GATEWAY, so[RTAX_GATEWAY]); NEXTADDR(RTA_NETMASK, so[RTAX_NETMASK]); NEXTADDR(RTA_GENMASK, so[RTAX_GENMASK]); NEXTADDR(RTA_IFP, so[RTAX_IFP]); NEXTADDR(RTA_IFA, so[RTAX_IFA]); rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; if (verbose) print_rtmsg(&rtm, l); if (debugonly) return (0); if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { switch (errno) { case EPERM: err(1, "writing to routing socket"); break; case ESRCH: warnx("route has not been found"); break; case EEXIST: /* Handled by newroute() */ break; default: warn("writing to routing socket"); } return (-1); } if (cmd == RTM_GET) { stop_read = 0; alarm(READ_TIMEOUT); do { l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); } while (l > 0 && stop_read == 0 && (rtm.rtm_type != RTM_GET || rtm.rtm_seq != rtm_seq || rtm.rtm_pid != pid)); if (stop_read != 0) { warnx("read from routing socket timed out"); return (-1); } else alarm(0); if (l < 0) warn("read from routing socket"); else print_getmsg(&rtm, l, fib); } #undef rtm return (0); } static const char *const msgtypes[] = { "", "RTM_ADD: Add Route", "RTM_DELETE: Delete Route", "RTM_CHANGE: Change Metrics or flags", "RTM_GET: Report Metrics", "RTM_LOSING: Kernel Suspects Partitioning", "RTM_REDIRECT: Told to use different route", "RTM_MISS: Lookup failed on this address", "RTM_LOCK: fix specified metrics", "RTM_OLDADD: caused by SIOCADDRT", "RTM_OLDDEL: caused by SIOCDELRT", "RTM_RESOLVE: Route created by cloning", "RTM_NEWADDR: address being added to iface", "RTM_DELADDR: address being removed from iface", "RTM_IFINFO: iface status change", "RTM_NEWMADDR: new multicast group membership on iface", "RTM_DELMADDR: multicast group membership removed from iface", "RTM_IFANNOUNCE: interface arrival/departure", "RTM_IEEE80211: IEEE 802.11 wireless event", }; static const char metricnames[] = "\011weight\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire" "\1mtu"; static const char routeflags[] = "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE" "\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE" "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3" "\024FIXEDMTU\025PINNED\026LOCAL\027BROADCAST\030MULTICAST\035STICKY"; static const char ifnetflags[] = "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP" "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1" "\017LINK2\020MULTICAST"; static const char addrnames[] = "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; static const char errfmt[] = "\n%s: truncated route message, only %zu bytes left\n"; static void print_rtmsg(struct rt_msghdr *rtm, size_t msglen) { struct if_msghdr *ifm; struct ifa_msghdr *ifam; #ifdef RTM_NEWMADDR struct ifma_msghdr *ifmam; #endif struct if_announcemsghdr *ifan; const char *state; if (verbose == 0) return; if (rtm->rtm_version != RTM_VERSION) { (void)printf("routing message version %d not understood\n", rtm->rtm_version); return; } if (rtm->rtm_type < nitems(msgtypes)) (void)printf("%s: ", msgtypes[rtm->rtm_type]); else (void)printf("unknown type %d: ", rtm->rtm_type); (void)printf("len %d, ", rtm->rtm_msglen); #define REQUIRE(x) do { \ if (msglen < sizeof(x)) \ goto badlen; \ else \ msglen -= sizeof(x); \ } while (0) switch (rtm->rtm_type) { case RTM_IFINFO: REQUIRE(struct if_msghdr); ifm = (struct if_msghdr *)rtm; (void)printf("if# %d, ", ifm->ifm_index); switch (ifm->ifm_data.ifi_link_state) { case LINK_STATE_DOWN: state = "down"; break; case LINK_STATE_UP: state = "up"; break; default: state = "unknown"; break; } (void)printf("link: %s, flags:", state); printb(ifm->ifm_flags, ifnetflags); pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs, msglen); break; case RTM_NEWADDR: case RTM_DELADDR: REQUIRE(struct ifa_msghdr); ifam = (struct ifa_msghdr *)rtm; (void)printf("metric %d, flags:", ifam->ifam_metric); printb(ifam->ifam_flags, routeflags); pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs, msglen); break; #ifdef RTM_NEWMADDR case RTM_NEWMADDR: case RTM_DELMADDR: REQUIRE(struct ifma_msghdr); ifmam = (struct ifma_msghdr *)rtm; pmsg_addrs((char *)(ifmam + 1), ifmam->ifmam_addrs, msglen); break; #endif case RTM_IFANNOUNCE: REQUIRE(struct if_announcemsghdr); ifan = (struct if_announcemsghdr *)rtm; (void)printf("if# %d, what: ", ifan->ifan_index); switch (ifan->ifan_what) { case IFAN_ARRIVAL: (void)printf("arrival"); break; case IFAN_DEPARTURE: printf("departure"); break; default: printf("#%d", ifan->ifan_what); break; } printf("\n"); fflush(stdout); break; default: if (rtm->rtm_type <= RTM_RESOLVE) { printf("pid: %ld, seq %d, errno %d, flags:", (long)rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); printb(rtm->rtm_flags, routeflags); pmsg_common(rtm, msglen); } else printf("type: %u, len: %zu\n", rtm->rtm_type, msglen); } return; badlen: (void)printf(errfmt, __func__, msglen); #undef REQUIRE } static void print_getmsg(struct rt_msghdr *rtm, int msglen, int fib) { struct sockaddr *sp[RTAX_MAX]; struct timespec ts; char *cp; int i; memset(sp, 0, sizeof(sp)); (void)printf(" route to: %s\n", routename((struct sockaddr *)&so[RTAX_DST])); if (rtm->rtm_version != RTM_VERSION) { warnx("routing message version %d not understood", rtm->rtm_version); return; } if (rtm->rtm_msglen > msglen) { warnx("message length mismatch, in packet %d, returned %d", rtm->rtm_msglen, msglen); return; } if (rtm->rtm_errno) { errno = rtm->rtm_errno; warn("message indicates error %d", errno); return; } cp = ((char *)(rtm + 1)); for (i = 0; i < RTAX_MAX; i++) if (rtm->rtm_addrs & (1 << i)) { sp[i] = (struct sockaddr *)cp; cp += SA_SIZE((struct sockaddr *)cp); } if ((rtm->rtm_addrs & RTA_IFP) && (sp[RTAX_IFP]->sa_family != AF_LINK || ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen == 0)) sp[RTAX_IFP] = NULL; if (sp[RTAX_DST]) (void)printf("destination: %s\n", routename(sp[RTAX_DST])); if (sp[RTAX_NETMASK]) (void)printf(" mask: %s\n", routename(sp[RTAX_NETMASK])); if (sp[RTAX_GATEWAY] && (rtm->rtm_flags & RTF_GATEWAY)) (void)printf(" gateway: %s\n", routename(sp[RTAX_GATEWAY])); if (fib >= 0) (void)printf(" fib: %u\n", (unsigned int)fib); if (sp[RTAX_IFP]) (void)printf(" interface: %.*s\n", ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_nlen, ((struct sockaddr_dl *)(void *)sp[RTAX_IFP])->sdl_data); (void)printf(" flags: "); printb(rtm->rtm_flags, routeflags); #define lock(f) ((rtm->rtm_rmx.rmx_locks & __CONCAT(RTV_,f)) ? 'L' : ' ') #define msec(u) (((u) + 500) / 1000) /* usec to msec */ printf("\n%9s %9s %9s %9s %9s %10s %9s\n", "recvpipe", "sendpipe", "ssthresh", "rtt,msec", "mtu ", "weight", "expire"); printf("%8lu%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); printf("%8lu%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); printf("%8lu%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); printf("%8lu%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); printf("%8lu%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); printf("%8lu%c ", rtm->rtm_rmx.rmx_weight, lock(WEIGHT)); if (rtm->rtm_rmx.rmx_expire > 0) clock_gettime(CLOCK_REALTIME_FAST, &ts); else ts.tv_sec = 0; printf("%8ld%c\n", (long)(rtm->rtm_rmx.rmx_expire - ts.tv_sec), lock(EXPIRE)); #undef lock #undef msec #define RTA_IGN (RTA_DST|RTA_GATEWAY|RTA_NETMASK|RTA_IFP|RTA_IFA|RTA_BRD) if (verbose) pmsg_common(rtm, msglen); else if (rtm->rtm_addrs &~ RTA_IGN) { (void)printf("sockaddrs: "); printb(rtm->rtm_addrs, addrnames); putchar('\n'); } #undef RTA_IGN } static void pmsg_common(struct rt_msghdr *rtm, size_t msglen) { (void)printf("\nlocks: "); printb(rtm->rtm_rmx.rmx_locks, metricnames); (void)printf(" inits: "); printb(rtm->rtm_inits, metricnames); if (msglen > sizeof(struct rt_msghdr)) pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs, msglen - sizeof(struct rt_msghdr)); else (void)fflush(stdout); } static void pmsg_addrs(char *cp, int addrs, size_t len) { struct sockaddr *sa; int i; if (addrs == 0) { (void)putchar('\n'); return; } (void)printf("\nsockaddrs: "); printb(addrs, addrnames); putchar('\n'); for (i = 0; i < RTAX_MAX; i++) if (addrs & (1 << i)) { sa = (struct sockaddr *)cp; if (len == 0 || len < SA_SIZE(sa)) { (void)printf(errfmt, __func__, len); break; } (void)printf(" %s", routename(sa)); len -= SA_SIZE(sa); cp += SA_SIZE(sa); } (void)putchar('\n'); (void)fflush(stdout); } static void printb(int b, const char *str) { int i; int gotsome = 0; if (b == 0) return; while ((i = *str++) != 0) { if (b & (1 << (i-1))) { if (gotsome == 0) i = '<'; else i = ','; putchar(i); gotsome = 1; for (; (i = *str) > 32; str++) putchar(i); } else while (*str > 32) str++; } if (gotsome) putchar('>'); } int keyword(const char *cp) { const struct keytab *kt = keywords; while (kt->kt_cp != NULL && strcmp(kt->kt_cp, cp) != 0) kt++; return (kt->kt_i); } static void sodump(struct sockaddr *sa, const char *which) { #ifdef INET6 char nbuf[INET6_ADDRSTRLEN]; #endif switch (sa->sa_family) { case AF_LINK: (void)printf("%s: link %s; ", which, link_ntoa((struct sockaddr_dl *)(void *)sa)); break; #ifdef INET case AF_INET: (void)printf("%s: inet %s; ", which, inet_ntoa(((struct sockaddr_in *)(void *)sa)->sin_addr)); break; #endif #ifdef INET6 case AF_INET6: (void)printf("%s: inet6 %s; ", which, inet_ntop(sa->sa_family, &((struct sockaddr_in6 *)(void *)sa)->sin6_addr, nbuf, sizeof(nbuf))); break; #endif } (void)fflush(stdout); } /* States*/ #define VIRGIN 0 #define GOTONE 1 #define GOTTWO 2 /* Inputs */ #define DIGIT (4*0) #define END (4*1) #define DELIM (4*2) static void sockaddr(char *addr, struct sockaddr *sa, size_t size) { char *cp = (char *)sa; char *cplim = cp + size; int byte = 0, state = VIRGIN, new = 0 /* foil gcc */; memset(cp, 0, size); cp++; do { if ((*addr >= '0') && (*addr <= '9')) { new = *addr - '0'; } else if ((*addr >= 'a') && (*addr <= 'f')) { new = *addr - 'a' + 10; } else if ((*addr >= 'A') && (*addr <= 'F')) { new = *addr - 'A' + 10; } else if (*addr == '\0') state |= END; else state |= DELIM; addr++; switch (state /* | INPUT */) { case GOTTWO | DIGIT: *cp++ = byte; /*FALLTHROUGH*/ case VIRGIN | DIGIT: state = GOTONE; byte = new; continue; case GOTONE | DIGIT: state = GOTTWO; byte = new + (byte << 4); continue; default: /* | DELIM */ state = VIRGIN; *cp++ = byte; byte = 0; continue; case GOTONE | END: case GOTTWO | END: *cp++ = byte; /* FALLTHROUGH */ case VIRGIN | END: break; } break; } while (cp < cplim); sa->sa_len = cp - (char *)sa; }