/* $NetBSD: route.c,v 1.28 1998/04/01 15:14:25 kleink Exp $ */ /* * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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. */ #include #ifndef lint __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"; #else __RCSID("$NetBSD: route.c,v 1.28 1998/04/01 15:14:25 kleink Exp $"); #endif #endif /* not lint */ #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 "keywords.h" #include "extern.h" typedef union sockunion *sup; int main __P((int, char **)); static void usage __P((char *)); static char *any_ntoa __P((const struct sockaddr *)); static void set_metric __P((char *, int)); static void newroute __P((int, char **)); static void inet_makenetandmask __P((u_int32_t, struct sockaddr_in *)); static int getaddr __P((int, char *, struct hostent **)); #ifndef SMALL static void flushroutes __P((int, char *[])); static int x25_makemask __P((void)); static void interfaces __P((void)); static void monitor __P((void)); static void print_getmsg __P((struct rt_msghdr *, int)); #endif static int rtmsg __P((int, int )); static void mask_addr __P((void)); static void print_rtmsg __P((struct rt_msghdr *, int)); static void pmsg_common __P((struct rt_msghdr *)); static void pmsg_addrs __P((char *, int)); static void bprintf __P((FILE *, int, u_char *)); static int keyword __P((char *)); static void sodump __P((sup, char *)); static void sockaddr __P((char *, struct sockaddr *)); struct ortentry route; union sockunion { struct sockaddr sa; struct sockaddr_in sin; struct sockaddr_at sat; struct sockaddr_ns sns; struct sockaddr_iso siso; struct sockaddr_dl sdl; struct sockaddr_x25 sx25; } so_dst, so_gate, so_mask, so_genmask, so_ifa, so_ifp; int pid, rtm_addrs; int s; int forcehost, forcenet, doflush, nflag, af, qflag, tflag; int iflag, verbose, aflen = sizeof (struct sockaddr_in); int locking, lockrest, debugonly; struct rt_metrics rt_metrics; u_int32_t rtm_inits; static void usage(cp) char *cp; { extern char *__progname; if (cp) warnx("botched keyword: %s", cp); (void) fprintf(stderr, "Usage: %s [ -nqv ] cmd [[ - ] args ]\n", __progname); exit(1); /* NOTREACHED */ } #define ROUNDUP(a) \ ((a) > 0 ? (1 + (((a) - 1) | (sizeof(int32_t) - 1))) : sizeof(int32_t)) #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) int main(argc, argv) int argc; char **argv; { int ch; if (argc < 2) usage(NULL); while ((ch = getopt(argc, argv, "nqdtv")) != -1) switch(ch) { 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(); if (tflag) s = open("/dev/null", O_WRONLY, 0); else s = socket(PF_ROUTE, SOCK_RAW, 0); if (s < 0) err(1, "socket"); if (*argv == NULL) goto no_cmd; switch (keyword(*argv)) { #ifndef SMALL case K_GET: #endif /* SMALL */ case K_CHANGE: case K_ADD: case K_DELETE: newroute(argc, argv); break; case K_SHOW: show(argc, argv); break; #ifndef SMALL case K_MONITOR: monitor(); break; case K_FLUSH: flushroutes(argc, argv); break; #endif /* SMALL */ no_cmd: default: usage(*argv); return 1; } return 0; } #ifndef SMALL /* * Purge all entries in the routing tables not * associated with network interfaces. */ static void flushroutes(argc, argv) int argc; char *argv[]; { size_t needed; int mib[6], rlen, seqno; char *buf, *next, *lim; struct rt_msghdr *rtm; shutdown(s, 0); /* Don't want to read back our messages */ if (argc > 1) { argv++; if (argc == 2 && **argv == '-') switch (keyword(*argv + 1)) { case K_INET: af = AF_INET; break; case K_ATALK: af = AF_APPLETALK; break; case K_XNS: af = AF_NS; break; case K_LINK: af = AF_LINK; break; case K_ISO: case K_OSI: af = AF_ISO; break; case K_X25: af = AF_CCITT; default: goto bad; } else bad: usage(*argv); } mib[0] = CTL_NET; mib[1] = PF_ROUTE; mib[2] = 0; /* protocol */ mib[3] = 0; /* wildcard address family */ mib[4] = NET_RT_DUMP; mib[5] = 0; /* no flags */ if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) err(1, "route-sysctl-estimate"); if (needed == 0) return; if ((buf = malloc(needed)) == NULL) err(1, "malloc"); if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) err(1, "actual retrieval of routing table"); lim = buf + needed; if (verbose) { (void) printf("Examining routing table from sysctl\n"); if (af) printf("(address family %s)\n", (*argv + 1)); } seqno = 0; /* ??? */ for (next = buf; next < lim; next += rtm->rtm_msglen) { rtm = (struct rt_msghdr *)next; if (verbose) print_rtmsg(rtm, rtm->rtm_msglen); if ((rtm->rtm_flags & RTF_GATEWAY) == 0) continue; if (af) { 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 < (int)rtm->rtm_msglen) { warn("write to routing socket, got %d for rlen", rlen); break; } seqno++; if (qflag) continue; if (verbose) print_rtmsg(rtm, rlen); else { struct sockaddr *sa = (struct sockaddr *)(rtm + 1); (void) printf("%-20.20s ", rtm->rtm_flags & RTF_HOST ? routename(sa) : netname(sa)); sa = (struct sockaddr *)(sa->sa_len + (char *)sa); (void) printf("%-20.20s ", routename(sa)); (void) printf("done\n"); } } } #endif /* SMALL */ static char hexlist[] = "0123456789abcdef"; static char * any_ntoa(sa) const struct sockaddr *sa; { static char obuf[64]; const char *in; char *out; int len; len = sa->sa_len; in = sa->sa_data; out = obuf; do { *out++ = hexlist[(*in >> 4) & 15]; *out++ = hexlist[(*in++) & 15]; *out++ = '.'; } while (--len > 0); out[-1] = '\0'; return obuf; } char * routename(sa) struct sockaddr *sa; { char *cp; static char line[50]; struct hostent *hp; static char domain[MAXHOSTNAMELEN + 1]; static int first = 1; struct in_addr in; if (first) { first = 0; if (gethostname(domain, MAXHOSTNAMELEN) == 0 && (cp = strchr(domain, '.'))) { (void)strncpy(domain, cp + 1, sizeof(domain) - 1); domain[sizeof(domain) - 1] = '\0'; } else domain[0] = 0; } if (sa->sa_len == 0) { strncpy(line, "default", sizeof(line) - 1); line[sizeof(line) - 1] = '\0'; } else switch (sa->sa_family) { case AF_INET: in = ((struct sockaddr_in *)sa)->sin_addr; cp = 0; if (in.s_addr == INADDR_ANY || sa->sa_len < 4) cp = "default"; if (cp == 0 && !nflag) { hp = gethostbyaddr((char *)&in, sizeof (struct in_addr), AF_INET); if (hp) { if ((cp = strchr(hp->h_name, '.')) && !strcmp(cp + 1, domain)) *cp = 0; cp = hp->h_name; } } if (cp) (void)strncpy(line, cp, sizeof(line) - 1); else (void)strncpy(line, inet_ntoa(in), sizeof(line) - 1); line[sizeof(line) - 1] = '\0'; break; case AF_LINK: return (link_ntoa((struct sockaddr_dl *)sa)); #ifndef SMALL case AF_NS: return (ns_print((struct sockaddr_ns *)sa)); case AF_ISO: (void)snprintf(line, sizeof line, "iso %s", iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); break; case AF_APPLETALK: (void) snprintf(line, sizeof(line), "atalk %d.%d", ((struct sockaddr_at *)sa)->sat_addr.s_net, ((struct sockaddr_at *)sa)->sat_addr.s_node); break; #endif /* SMALL */ default: (void)snprintf(line, sizeof line, "(%d) %s", sa->sa_family, any_ntoa(sa)); break; } return (line); } /* * Return the name of the network whose address is given. * The address is assumed to be that of a net or subnet, not a host. */ char * netname(sa) struct sockaddr *sa; { char *cp = 0; static char line[50]; struct netent *np = 0; u_int32_t net, mask; u_int32_t i; int subnetshift; struct in_addr in; switch (sa->sa_family) { case AF_INET: in = ((struct sockaddr_in *)sa)->sin_addr; i = ntohl(in.s_addr); if (i == 0) cp = "default"; else if (!nflag) { if (IN_CLASSA(i)) { mask = IN_CLASSA_NET; subnetshift = 8; } else if (IN_CLASSB(i)) { mask = IN_CLASSB_NET; subnetshift = 8; } else { mask = IN_CLASSC_NET; subnetshift = 4; } /* * If there are more bits than the standard mask * would suggest, subnets must be in use. * Guess at the subnet mask, assuming reasonable * width subnet fields. */ while (i &~ mask) mask = (int32_t)mask >> subnetshift; net = i & mask; while ((mask & 1) == 0) mask >>= 1, net >>= 1; np = getnetbyaddr(net, AF_INET); if (np) cp = np->n_name; } if (cp) { (void)strncpy(line, cp, sizeof(line) - 1); line[sizeof(line) - 1] = '\0'; } else { #if 0 /* XXX - This is silly... */ #define C(x) ((x) & 0xff) if ((i & 0xffffff) == 0) (void)snprintf(line, sizeof line, "%u", C(i >> 24)); else if ((i & 0xffff) == 0) (void)snprintf(line, sizeof line, "%u.%u", C(i >> 24), C(i >> 16)); else if ((i & 0xff) == 0) (void)snprintf(line, sizeof line, "%u.%u.%u", C(i >> 24), C(i >> 16), C(i >> 8)); else (void)snprintf(line, sizeof line, "%u.%u.%u.%u", C(i >> 24), C(i >> 16), C(i >> 8), C(i)); #undef C #else /* XXX */ (void)strncpy(line, inet_ntoa(in), sizeof(line) - 1); #endif /* XXX */ } break; case AF_LINK: return (link_ntoa((struct sockaddr_dl *)sa)); #ifndef SMALL case AF_NS: return (ns_print((struct sockaddr_ns *)sa)); case AF_ISO: (void)snprintf(line, sizeof line, "iso %s", iso_ntoa(&((struct sockaddr_iso *)sa)->siso_addr)); break; case AF_APPLETALK: (void) snprintf(line, sizeof(line), "atalk %d.%d", ((struct sockaddr_at *)sa)->sat_addr.s_net, ((struct sockaddr_at *)sa)->sat_addr.s_node); break; #endif /* SMALL */ default: (void)snprintf(line, sizeof line, "af %d: %s", sa->sa_family, any_ntoa(sa)); break; } return (line); } static void set_metric(value, key) char *value; int key; { int flag = 0; 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); } rtm_inits |= flag; if (lockrest || locking) rt_metrics.rmx_locks |= flag; if (locking) locking = 0; *valp = atoi(value); } static void newroute(argc, argv) int argc; char **argv; { char *cmd, *dest = "", *gateway = "", *err; int ishost = 0, ret, attempts, oerrno, flags = RTF_STATIC; int key; struct hostent *hp = 0; cmd = argv[0]; if (*cmd != 'g') shutdown(s, 0); /* Don't want to read back our messages */ while (--argc > 0) { if (**(++argv)== '-') { switch (key = keyword(1 + *argv)) { case K_SA: af = PF_ROUTE; aflen = sizeof(union sockunion); break; case K_ATALK: af = AF_APPLETALK; aflen = sizeof(struct sockaddr_at); break; case K_INET: af = AF_INET; aflen = sizeof(struct sockaddr_in); break; case K_LINK: af = AF_LINK; aflen = sizeof(struct sockaddr_dl); break; case K_OSI: case K_ISO: af = AF_ISO; aflen = sizeof(struct sockaddr_iso); break; case K_X25: af = AF_CCITT; aflen = sizeof(struct sockaddr_x25); break; case K_XNS: af = AF_NS; aflen = sizeof(struct sockaddr_ns); break; case K_IFACE: case K_INTERFACE: iflag++; break; case K_NOSTATIC: flags &= ~RTF_STATIC; break; case K_LLINFO: flags |= RTF_LLINFO; break; case K_LOCK: locking = 1; break; case K_LOCKREST: lockrest = 1; break; case K_HOST: 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_CLONING: flags |= RTF_CLONING; break; case K_XRESOLVE: flags |= RTF_XRESOLVE; break; case K_STATIC: flags |= RTF_STATIC; break; case K_IFA: if (!--argc) usage(1+*argv); (void) getaddr(RTA_IFA, *++argv, 0); break; case K_IFP: if (!--argc) usage(1+*argv); (void) getaddr(RTA_IFP, *++argv, 0); break; case K_GENMASK: if (!--argc) usage(1+*argv); (void) getaddr(RTA_GENMASK, *++argv, 0); break; case K_GATEWAY: if (!--argc) usage(1+*argv); (void) getaddr(RTA_GATEWAY, *++argv, 0); break; case K_DST: if (!--argc) usage(1+*argv); ishost = getaddr(RTA_DST, *++argv, &hp); dest = *argv; break; case K_NETMASK: if (!--argc) usage(1+*argv); (void) getaddr(RTA_NETMASK, *++argv, 0); /* FALLTHROUGH */ case K_NET: forcenet++; 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: if (!--argc) usage(1+*argv); set_metric(*++argv, key); break; default: usage(1+*argv); } } else { if ((rtm_addrs & RTA_DST) == 0) { dest = *argv; ishost = getaddr(RTA_DST, *argv, &hp); } else if ((rtm_addrs & RTA_GATEWAY) == 0) { gateway = *argv; (void) getaddr(RTA_GATEWAY, *argv, &hp); } else { int ret = atoi(*argv); if (ret == 0) { if (!qflag && strcmp(*argv, "0") == 0) warnx("%s, %s", "old usage of trailing 0", "assuming route to if"); else usage((char *)NULL); iflag = 1; continue; } else if (ret > 0 && ret < 10) { if (!qflag) { warnx("%s, %s", "old usage of trailing digit", "assuming route via gateway"); } iflag = 0; continue; } (void) getaddr(RTA_NETMASK, *argv, 0); } } } if (forcehost) ishost = 1; if (forcenet) ishost = 0; flags |= RTF_UP; if (ishost) flags |= RTF_HOST; if (iflag == 0) flags |= RTF_GATEWAY; for (attempts = 1; ; attempts++) { errno = 0; if ((ret = rtmsg(*cmd, flags)) == 0) break; if (errno != ENETUNREACH && errno != ESRCH) break; if (af == AF_INET && *gateway && hp && hp->h_addr_list[1]) { hp->h_addr_list++; memmove(&so_gate.sin.sin_addr, hp->h_addr_list[0], hp->h_length); } else break; } if (*cmd == 'g') exit(0); oerrno = errno; if (!qflag) { (void) printf("%s %s %s", cmd, ishost? "host" : "net", dest); if (*gateway) { (void) printf(": gateway %s", gateway); if (attempts > 1 && ret == 0 && af == AF_INET) (void) printf(" (%s)", inet_ntoa(((struct sockaddr_in *) &route.rt_gateway)->sin_addr)); } if (ret == 0) (void) printf("\n"); } if (ret != 0) { switch (oerrno) { case ESRCH: err = "not in table"; break; case EBUSY: err = "entry in use"; break; case ENOBUFS: err = "routing table overflow"; break; default: err = strerror(oerrno); break; } (void) printf(": %s\n", err); } } static void inet_makenetandmask(net, sin) u_int32_t net; struct sockaddr_in *sin; { u_int32_t addr, mask = 0; char *cp; rtm_addrs |= RTA_NETMASK; if (net == 0) mask = addr = 0; else if (net < 128) { addr = net << IN_CLASSA_NSHIFT; mask = IN_CLASSA_NET; } else if (net < 65536) { addr = net << IN_CLASSB_NSHIFT; mask = IN_CLASSB_NET; } else if (net < 16777216L) { addr = net << IN_CLASSC_NSHIFT; mask = IN_CLASSC_NET; } else { addr = net; if ((addr & IN_CLASSA_HOST) == 0) mask = IN_CLASSA_NET; else if ((addr & IN_CLASSB_HOST) == 0) mask = IN_CLASSB_NET; else if ((addr & IN_CLASSC_HOST) == 0) mask = IN_CLASSC_NET; else mask = -1; } sin->sin_addr.s_addr = htonl(addr); sin = &so_mask.sin; sin->sin_addr.s_addr = htonl(mask); sin->sin_len = 0; sin->sin_family = 0; cp = (char *)(&sin->sin_addr + 1); while (*--cp == 0 && cp > (char *)sin) ; sin->sin_len = 1 + cp - (char *)sin; } /* * Interpret an argument as a network address of some kind, * returning 1 if a host address, 0 if a network address. */ static int getaddr(which, s, hpp) int which; char *s; struct hostent **hpp; { sup su; struct hostent *hp; struct netent *np; u_int32_t val; char *t; if (af == 0) { af = AF_INET; aflen = sizeof(struct sockaddr_in); } rtm_addrs |= which; switch (which) { case RTA_DST: su = &so_dst; su->sa.sa_family = af; break; case RTA_GATEWAY: su = &so_gate; su->sa.sa_family = af; break; case RTA_NETMASK: su = &so_mask; break; case RTA_GENMASK: su = &so_genmask; break; case RTA_IFP: su = &so_ifp; su->sa.sa_family = af; break; case RTA_IFA: su = &so_ifa; su->sa.sa_family = af; break; default: su = NULL; usage("Internal Error"); /*NOTREACHED*/ } su->sa.sa_len = aflen; if (strcmp(s, "default") == 0) { switch (which) { case RTA_DST: forcenet++; (void) getaddr(RTA_NETMASK, s, 0); break; case RTA_NETMASK: case RTA_GENMASK: su->sa.sa_len = 0; } return (0); } switch (af) { #ifndef SMALL case AF_NS: if (which == RTA_DST) { extern short ns_bh[3]; struct sockaddr_ns *sms = &(so_mask.sns); memset(sms, 0, sizeof(*sms)); sms->sns_family = 0; sms->sns_len = 6; sms->sns_addr.x_net = *(union ns_net *)ns_bh; rtm_addrs |= RTA_NETMASK; } su->sns.sns_addr = ns_addr(s); return (!ns_nullhost(su->sns.sns_addr)); case AF_OSI: su->siso.siso_addr = *iso_addr(s); if (which == RTA_NETMASK || which == RTA_GENMASK) { char *cp = (char *)TSEL(&su->siso); su->siso.siso_nlen = 0; do {--cp ;} while ((cp > (char *)su) && (*cp == 0)); su->siso.siso_len = 1 + cp - (char *)su; } return (1); case AF_CCITT: ccitt_addr(s, &su->sx25); return (which == RTA_DST ? x25_makemask() : 1); #endif /* SMALL */ case PF_ROUTE: su->sa.sa_len = sizeof(*su); sockaddr(s, &su->sa); return (1); case AF_APPLETALK: t = strchr (s, '.'); if (!t) { badataddr: errx(1, "bad address: %s", s); } val = atoi (s); if (val > 65535) goto badataddr; su->sat.sat_addr.s_net = val; val = atoi (t); if (val > 256) goto badataddr; su->sat.sat_addr.s_node = val; rtm_addrs |= RTA_NETMASK; return(forcehost || su->sat.sat_addr.s_node != 0); case AF_LINK: link_addr(s, &su->sdl); return (1); case AF_INET: default: break; } if (hpp == NULL) hpp = &hp; *hpp = NULL; if (((val = inet_addr(s)) != INADDR_NONE) && (which != RTA_DST || forcenet == 0)) { su->sin.sin_addr.s_addr = val; if (inet_lnaof(su->sin.sin_addr) != INADDR_ANY) return (1); else { val = ntohl(val); goto netdone; } } if ((val = inet_network(s)) != INADDR_NONE || ((np = getnetbyname(s)) != NULL && (val = np->n_net) != 0)) { netdone: if (which == RTA_DST) inet_makenetandmask(val, &su->sin); return (0); } hp = gethostbyname(s); if (hp) { *hpp = hp; su->sin.sin_family = hp->h_addrtype; memmove(&su->sin.sin_addr, hp->h_addr, hp->h_length); return (1); } errx(1, "bad value: %s", s); } #ifndef SMALL int x25_makemask() { char *cp; if ((rtm_addrs & RTA_NETMASK) == 0) { rtm_addrs |= RTA_NETMASK; for (cp = (char *)&so_mask.sx25.x25_net; cp < &so_mask.sx25.x25_opts.op_flags; cp++) *cp = -1; so_mask.sx25.x25_len = (u_char)&(((sup)0)->sx25.x25_opts); } return 0; } short ns_nullh[] = {0,0,0}; short ns_bh[] = {-1,-1,-1}; char * ns_print(sns) struct sockaddr_ns *sns; { struct ns_addr work; union { union ns_net net_e; u_int32_t int32_t_e; } net; u_short port; static char mybuf[50], cport[10], chost[25]; char *host = ""; char *p; u_char *q; work = sns->sns_addr; port = ntohs(work.x_port); work.x_port = 0; net.net_e = work.x_net; if (ns_nullhost(work) && net.int32_t_e == 0) { if (!port) return ("*.*"); (void)snprintf(mybuf, sizeof mybuf, "*.%XH", port); return (mybuf); } if (memcmp(ns_bh, work.x_host.c_host, 6) == 0) host = "any"; else if (memcmp(ns_nullh, work.x_host.c_host, 6) == 0) host = "*"; else { q = work.x_host.c_host; (void)snprintf(chost, sizeof chost, "%02X%02X%02X%02X%02X%02XH", q[0], q[1], q[2], q[3], q[4], q[5]); for (p = chost; *p == '0' && p < chost + 12; p++) /* void */; host = p; } if (port) (void)snprintf(cport, sizeof cport, ".%XH", htons(port)); else *cport = 0; (void)snprintf(mybuf, sizeof mybuf, "%XH.%s%s", (u_int32_t)ntohl(net.int32_t_e), host, cport); return (mybuf); } static void interfaces() { size_t needed; int mib[6]; char *buf, *lim, *next; struct rt_msghdr *rtm; mib[0] = CTL_NET; mib[1] = PF_ROUTE; mib[2] = 0; /* protocol */ mib[3] = 0; /* wildcard address family */ mib[4] = NET_RT_IFLIST; mib[5] = 0; /* no flags */ if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) err(1, "route-sysctl-estimate"); if ((buf = malloc(needed)) == NULL) err(1, "malloc"); if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) err(1, "actual retrieval of interface table"); lim = buf + needed; for (next = buf; next < lim; next += rtm->rtm_msglen) { rtm = (struct rt_msghdr *)next; print_rtmsg(rtm, rtm->rtm_msglen); } } static void monitor() { int n; char msg[2048]; verbose = 1; if (debugonly) { interfaces(); exit(0); } for(;;) { n = read(s, msg, 2048); (void) printf("got message of size %d\n", n); print_rtmsg((struct rt_msghdr *)msg, n); } } #endif /* SMALL */ struct { struct rt_msghdr m_rtm; char m_space[512]; } m_rtmsg; static int rtmsg(cmd, flags) int cmd, flags; { static int seq; int rlen; char *cp = m_rtmsg.m_space; int l; #define NEXTADDR(w, u) \ if (rtm_addrs & (w)) {\ l = ROUNDUP(u.sa.sa_len); memmove(cp, &(u), l); cp += l;\ if (verbose) sodump(&(u),"u");\ } 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') { #ifdef SMALL return (-1); #else /* SMALL */ cmd = RTM_GET; if (so_ifp.sa.sa_family == 0) { so_ifp.sa.sa_family = AF_LINK; so_ifp.sa.sa_len = sizeof(struct sockaddr_dl); rtm_addrs |= RTA_IFP; } #endif /* SMALL */ } else cmd = RTM_DELETE; #define rtm m_rtmsg.m_rtm rtm.rtm_type = cmd; rtm.rtm_flags = flags; rtm.rtm_version = RTM_VERSION; rtm.rtm_seq = ++seq; rtm.rtm_addrs = rtm_addrs; rtm.rtm_rmx = rt_metrics; rtm.rtm_inits = rtm_inits; if (rtm_addrs & RTA_NETMASK) mask_addr(); NEXTADDR(RTA_DST, so_dst); NEXTADDR(RTA_GATEWAY, so_gate); NEXTADDR(RTA_NETMASK, so_mask); NEXTADDR(RTA_GENMASK, so_genmask); NEXTADDR(RTA_IFP, so_ifp); NEXTADDR(RTA_IFA, so_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) { perror("writing to routing socket"); return (-1); } #ifndef SMALL if (cmd == RTM_GET) { do { l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); if (l < 0) err(1, "read from routing socket"); else print_getmsg(&rtm, l); } #endif /* SMALL */ #undef rtm return (0); } static void mask_addr() { int olen = so_mask.sa.sa_len; char *cp1 = olen + (char *)&so_mask, *cp2; for (so_mask.sa.sa_len = 0; cp1 > (char *)&so_mask; ) if (*--cp1 != 0) { so_mask.sa.sa_len = 1 + cp1 - (char *)&so_mask; break; } if ((rtm_addrs & RTA_DST) == 0) return; switch (so_dst.sa.sa_family) { case AF_NS: case AF_INET: case AF_CCITT: case AF_APPLETALK: case 0: return; case AF_ISO: olen = MIN(so_dst.siso.siso_nlen, MAX(so_mask.sa.sa_len - 6, 0)); break; } cp1 = so_mask.sa.sa_len + 1 + (char *)&so_dst; cp2 = so_dst.sa.sa_len + 1 + (char *)&so_dst; while (cp2 > cp1) *--cp2 = 0; cp2 = so_mask.sa.sa_len + 1 + (char *)&so_mask; while (cp1 > so_dst.sa.sa_data) *--cp1 &= *--cp2; switch (so_dst.sa.sa_family) { case AF_ISO: so_dst.siso.siso_nlen = olen; break; } } char *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", 0, }; char metricnames[] = "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount\1mtu"; char routeflags[] = "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT\011CLONING\012XRESOLVE\013LLINFO\014STATIC\017PROTO2\020PROTO1"; char ifnetflags[] = "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6NOTRAILERS\7RUNNING\010NOARP\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1\017LINK2\020MULTICAST"; char addrnames[] = "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD"; static void print_rtmsg(rtm, msglen) struct rt_msghdr *rtm; int msglen; { struct if_msghdr *ifm; struct ifa_msghdr *ifam; if (verbose == 0) return; if (rtm->rtm_version != RTM_VERSION) { (void) printf("routing message version %d not understood\n", rtm->rtm_version); return; } (void)printf("%s: len %d, ", msgtypes[rtm->rtm_type], rtm->rtm_msglen); switch (rtm->rtm_type) { case RTM_IFINFO: ifm = (struct if_msghdr *)rtm; (void) printf("if# %d, flags:", ifm->ifm_index); bprintf(stdout, ifm->ifm_flags, ifnetflags); pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs); break; case RTM_NEWADDR: case RTM_DELADDR: ifam = (struct ifa_msghdr *)rtm; (void) printf("metric %d, flags:", ifam->ifam_metric); bprintf(stdout, ifam->ifam_flags, routeflags); pmsg_addrs((char *)(ifam + 1), ifam->ifam_addrs); break; default: (void) printf("pid: %d, seq %d, errno %d, flags:", rtm->rtm_pid, rtm->rtm_seq, rtm->rtm_errno); bprintf(stdout, rtm->rtm_flags, routeflags); pmsg_common(rtm); } } #ifndef SMALL static void print_getmsg(rtm, msglen) struct rt_msghdr *rtm; int msglen; { struct sockaddr *dst = NULL, *gate = NULL, *mask = NULL; struct sockaddr_dl *ifp = NULL; struct sockaddr *sa; char *cp; int i; (void) printf(" route to: %s\n", routename((struct sockaddr *) &so_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\n", rtm->rtm_msglen, msglen); } if (rtm->rtm_errno) { warn("RTM_GET"); return; } cp = ((char *)(rtm + 1)); if (rtm->rtm_addrs) for (i = 1; i; i <<= 1) if (i & rtm->rtm_addrs) { sa = (struct sockaddr *)cp; switch (i) { case RTA_DST: dst = sa; break; case RTA_GATEWAY: gate = sa; break; case RTA_NETMASK: mask = sa; break; case RTA_IFP: if (sa->sa_family == AF_LINK && ((struct sockaddr_dl *)sa)->sdl_nlen) ifp = (struct sockaddr_dl *)sa; break; } ADVANCE(cp, sa); } if (dst && mask) mask->sa_family = dst->sa_family; /* XXX */ if (dst) (void)printf("destination: %s\n", routename(dst)); if (mask) { int savenflag = nflag; nflag = 1; (void)printf(" mask: %s\n", routename(mask)); nflag = savenflag; } if (gate && rtm->rtm_flags & RTF_GATEWAY) (void)printf(" gateway: %s\n", routename(gate)); if (ifp) (void)printf(" interface: %.*s\n", ifp->sdl_nlen, ifp->sdl_data); (void)printf(" flags: "); bprintf(stdout, 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 */ (void) printf("\n%s\n", "\ recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire"); printf("%8ld%c ", rtm->rtm_rmx.rmx_recvpipe, lock(RPIPE)); printf("%8ld%c ", rtm->rtm_rmx.rmx_sendpipe, lock(SPIPE)); printf("%8ld%c ", rtm->rtm_rmx.rmx_ssthresh, lock(SSTHRESH)); printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rtt), lock(RTT)); printf("%8ld%c ", msec(rtm->rtm_rmx.rmx_rttvar), lock(RTTVAR)); printf("%8ld%c ", rtm->rtm_rmx.rmx_hopcount, lock(HOPCOUNT)); printf("%8ld%c ", rtm->rtm_rmx.rmx_mtu, lock(MTU)); if (rtm->rtm_rmx.rmx_expire) rtm->rtm_rmx.rmx_expire -= time(0); printf("%8ld%c\n", rtm->rtm_rmx.rmx_expire, 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); else if (rtm->rtm_addrs &~ RTA_IGN) { (void) printf("sockaddrs: "); bprintf(stdout, rtm->rtm_addrs, addrnames); putchar('\n'); } #undef RTA_IGN } #endif /* SMALL */ void pmsg_common(rtm) struct rt_msghdr *rtm; { (void) printf("\nlocks: "); bprintf(stdout, rtm->rtm_rmx.rmx_locks, metricnames); (void) printf(" inits: "); bprintf(stdout, rtm->rtm_inits, metricnames); pmsg_addrs(((char *)(rtm + 1)), rtm->rtm_addrs); } static void pmsg_addrs(cp, addrs) char *cp; int addrs; { struct sockaddr *sa; int i; if (addrs == 0) return; (void) printf("\nsockaddrs: "); bprintf(stdout, addrs, addrnames); (void) putchar('\n'); for (i = 1; i; i <<= 1) if (i & addrs) { sa = (struct sockaddr *)cp; (void) printf(" %s", routename(sa)); ADVANCE(cp, sa); } (void) putchar('\n'); (void) fflush(stdout); } static void bprintf(fp, b, s) FILE *fp; int b; u_char *s; { int i; int gotsome = 0; if (b == 0) return; while ((i = *s++) != 0) { if (b & (1 << (i-1))) { if (gotsome == 0) i = '<'; else i = ','; (void) putc(i, fp); gotsome = 1; for (; (i = *s) > 32; s++) (void) putc(i, fp); } else while (*s > 32) s++; } if (gotsome) (void) putc('>', fp); } static int keyword(cp) char *cp; { struct keytab *kt = keywords; while (kt->kt_cp && strcmp(kt->kt_cp, cp)) kt++; return kt->kt_i; } static void sodump(su, which) sup su; char *which; { switch (su->sa.sa_family) { case AF_INET: (void) printf("%s: inet %s; ", which, inet_ntoa(su->sin.sin_addr)); break; case AF_APPLETALK: (void) printf("%s: atalk %d.%d; ", which, su->sat.sat_addr.s_net, su->sat.sat_addr.s_node); break; case AF_LINK: (void) printf("%s: link %s; ", which, link_ntoa(&su->sdl)); break; #ifndef SMALL case AF_ISO: (void) printf("%s: iso %s; ", which, iso_ntoa(&su->siso.siso_addr)); break; case AF_NS: (void) printf("%s: xns %s; ", which, ns_ntoa(su->sns.sns_addr)); break; #endif /* SMALL */ default: (void) printf("af %p: %s; ", which, any_ntoa(&su->sa)); } (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(addr, sa) char *addr; struct sockaddr *sa; { char *cp = (char *)sa; int size = sa->sa_len; char *cplim = cp + size; int byte = 0, state = VIRGIN, new = 0; (void) 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; }