/* $NetBSD: ndp.c,v 1.59 2021/11/27 22:30:25 rillig Exp $ */ /* $KAME: ndp.c,v 1.121 2005/07/13 11:30:13 keiichi Exp $ */ /* * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project. * 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 project 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 PROJECT 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 PROJECT 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. */ /* * Copyright (c) 1984, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Sun Microsystems, Inc. * * 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. */ /* * Based on: * "@(#) Copyright (c) 1984, 1993\n\ * The Regents of the University of California. All rights reserved.\n"; * * "@(#)arp.c 8.2 (Berkeley) 1/2/94"; */ /* * ndp - display, set, delete and flush neighbor cache */ #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 "gmt2local.h" #include "prog_ops.h" static pid_t pid; static int nflag; static int tflag; static int32_t thiszone; /* time difference with gmt */ static int my_s = -1; static unsigned int repeat = 0; static char host_buf[NI_MAXHOST]; /* getnameinfo() */ static char ifix_buf[IFNAMSIZ]; /* if_indextoname() */ static void getsocket(void); static int set(int, char **); static void get(char *); static int delete(struct rt_msghdr *, char *); static void delete_one(char *); static void do_foreach(struct in6_addr *, char *, int); static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, unsigned int, int); static char *ether_str(struct sockaddr_dl *); static int ndp_ether_aton(char *, u_char *); __dead static void usage(void); static int rtmsg(int, struct rt_msghdr *); static void ifinfo(char *, int, char **); static const char *sec2str(time_t); static char *ether_str(struct sockaddr_dl *); static void ts_print(const struct timeval *); #define NDP_F_CLEAR 1 #define NDP_F_DELETE 2 static int mode = 0; static char *arg = NULL; int main(int argc, char **argv) { int ch; while ((ch = getopt(argc, argv, "acd:f:i:nstA:")) != -1) switch (ch) { case 'a': case 'c': case 's': case 'd': case 'f': case 'i' : if (mode) { usage(); /*NOTREACHED*/ } mode = ch; arg = optarg; break; case 'n': nflag = 1; break; case 't': tflag = 1; break; case 'A': if (mode) { usage(); /*NOTREACHED*/ } mode = 'a'; repeat = atoi(optarg); break; default: usage(); } argc -= optind; argv += optind; if (prog_init && prog_init() == -1) err(1, "init failed"); pid = prog_getpid(); thiszone = gmt2local(0L); switch (mode) { case 'a': case 'c': if (argc != 0) { usage(); /*NOTREACHED*/ } do_foreach(0, NULL, mode == 'c' ? NDP_F_CLEAR : 0); break; case 'd': if (argc != 0) { usage(); /*NOTREACHED*/ } delete_one(arg); break; case 'i': ifinfo(arg, argc, argv); break; case 's': if (argc < 2 || argc > 4) usage(); return(set(argc, argv) ? 1 : 0); case 0: if (argc != 1) { usage(); /*NOTREACHED*/ } get(argv[0]); break; } return(0); } static void makeaddr(struct sockaddr_in6 *mysin, const void *resp) { const struct sockaddr_in6 *res = resp; mysin->sin6_addr = res->sin6_addr; mysin->sin6_scope_id = res->sin6_scope_id; inet6_putscopeid(mysin, INET6_IS_ADDR_LINKLOCAL); } static void getsocket(void) { if (my_s < 0) { my_s = prog_socket(PF_ROUTE, SOCK_RAW, 0); if (my_s < 0) err(1, "socket"); } } #ifdef notdef static struct sockaddr_in6 so_mask = { .sin6_len = sizeof(so_mask), .sin6_family = AF_INET6 }; #endif static struct sockaddr_in6 blank_sin = { .sin6_len = sizeof(blank_sin), .sin6_family = AF_INET6 }; static struct sockaddr_in6 sin_m; static struct sockaddr_dl blank_sdl = { .sdl_len = sizeof(blank_sdl), .sdl_family = AF_LINK, }; static struct sockaddr_dl sdl_m; static int expire_time, flags, found_entry; static struct { struct rt_msghdr m_rtm; char m_space[512]; } m_rtmsg; /* * Set an individual neighbor cache entry */ static int set(int argc, char **argv) { register struct sockaddr_in6 *mysin = &sin_m; register struct sockaddr_dl *sdl; register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm); struct addrinfo hints, *res; int gai_error; u_char *ea; char *host = argv[0], *eaddr = argv[1]; getsocket(); argc -= 2; argv += 2; sdl_m = blank_sdl; sin_m = blank_sin; (void)memset(&hints, 0, sizeof(hints)); hints.ai_family = AF_INET6; gai_error = getaddrinfo(host, NULL, &hints, &res); if (gai_error) { warnx("%s: %s", host, gai_strerror(gai_error)); return 1; } makeaddr(mysin, res->ai_addr); freeaddrinfo(res); ea = (u_char *)LLADDR(&sdl_m); if (ndp_ether_aton(eaddr, ea) == 0) sdl_m.sdl_alen = 6; flags = expire_time = 0; while (argc-- > 0) { if (strncmp(argv[0], "temp", 4) == 0) { struct timeval tim; (void)gettimeofday(&tim, 0); expire_time = tim.tv_sec + 20 * 60; } else if (strncmp(argv[0], "proxy", 5) == 0) flags |= RTF_ANNOUNCE; argv++; } if (rtmsg(RTM_GET, NULL) < 0) { errx(1, "RTM_GET(%s) failed", host); /* NOTREACHED */ } mysin = (struct sockaddr_in6 *)(void *)(rtm + 1); sdl = (struct sockaddr_dl *)(void *)(RT_ROUNDUP(mysin->sin6_len) + (char *)(void *)mysin); if (IN6_ARE_ADDR_EQUAL(&mysin->sin6_addr, &sin_m.sin6_addr)) { if (sdl->sdl_family == AF_LINK && !(rtm->rtm_flags & RTF_GATEWAY)) { switch (sdl->sdl_type) { case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023: case IFT_ISO88024: case IFT_ISO88025: goto overwrite; } } /* * IPv4 arp command retries with sin_other = SIN_PROXY here. */ (void)fprintf(stderr, "set: cannot configure a new entry\n"); return 1; } overwrite: if (sdl->sdl_family != AF_LINK) { warnx("cannot intuit interface index and type for %s", host); return (1); } sdl_m.sdl_type = sdl->sdl_type; sdl_m.sdl_index = sdl->sdl_index; return (rtmsg(RTM_ADD, NULL)); } /* * Display an individual neighbor cache entry */ static void get(char *host) { struct sockaddr_in6 *mysin = &sin_m; struct addrinfo hints, *res; int gai_error; sin_m = blank_sin; (void)memset(&hints, 0, sizeof(hints)); hints.ai_family = AF_INET6; gai_error = getaddrinfo(host, NULL, &hints, &res); if (gai_error) { warnx("%s: %s", host, gai_strerror(gai_error)); return; } makeaddr(mysin, res->ai_addr); freeaddrinfo(res); do_foreach(&mysin->sin6_addr, host, 0); if (found_entry == 0) { (void)getnameinfo((struct sockaddr *)(void *)mysin, (socklen_t)mysin->sin6_len, host_buf, sizeof(host_buf), NULL ,0, (nflag ? NI_NUMERICHOST : 0)); errx(1, "%s (%s) -- no entry", host, host_buf); } } static void delete_one(char *host) { struct sockaddr_in6 *mysin = &sin_m; struct addrinfo hints, *res; int gai_error; sin_m = blank_sin; (void)memset(&hints, 0, sizeof(hints)); hints.ai_family = AF_INET6; gai_error = getaddrinfo(host, NULL, &hints, &res); if (gai_error) { warnx("%s: %s", host, gai_strerror(gai_error)); return; } makeaddr(mysin, res->ai_addr); freeaddrinfo(res); do_foreach(&mysin->sin6_addr, host, NDP_F_DELETE); } /* * Delete a neighbor cache entry */ static int delete(struct rt_msghdr *rtm, char *host) { char delete_host_buf[NI_MAXHOST]; struct sockaddr_in6 *mysin = &sin_m; struct sockaddr_dl *sdl; getsocket(); mysin = (struct sockaddr_in6 *)(void *)(rtm + 1); sdl = (struct sockaddr_dl *)(void *)(RT_ROUNDUP(mysin->sin6_len) + (char *)(void *)mysin); if (sdl->sdl_family != AF_LINK) { (void)printf("cannot locate %s\n", host); return (1); } if (rtmsg(RTM_DELETE, rtm) == 0) { struct sockaddr_in6 s6 = *mysin; /* XXX: for safety */ s6.sin6_scope_id = 0; inet6_putscopeid(&s6, INET6_IS_ADDR_LINKLOCAL); (void)getnameinfo((struct sockaddr *)(void *)&s6, (socklen_t)s6.sin6_len, delete_host_buf, sizeof(delete_host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0)); (void)printf("%s (%s) deleted\n", host, delete_host_buf); } return 0; } #define W_ADDR (8 * 4 + 7) #define W_LL 17 #define W_IF 6 /* * Iterate on neighbor caches and do * - dump all caches, * - clear all caches (NDP_F_CLEAR) or * - remove matched caches (NDP_F_DELETE) */ static void do_foreach(struct in6_addr *addr, char *host, int _flags) { int mib[6]; size_t needed; char *lim, *buf, *next; struct rt_msghdr *rtm; struct sockaddr_in6 *mysin; struct sockaddr_dl *sdl; struct in6_nbrinfo *nbi; struct timeval tim; int addrwidth; int llwidth; int ifwidth; char flgbuf[8], *fl; const char *ifname; int cflag = _flags == NDP_F_CLEAR; int dflag = _flags == NDP_F_DELETE; /* Print header */ if (!tflag && !cflag) (void)printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %2s\n", W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address", W_IF, W_IF, "Netif", "Expire", "S", "Fl"); again:; mib[0] = CTL_NET; mib[1] = PF_ROUTE; mib[2] = 0; mib[3] = AF_INET6; mib[4] = NET_RT_FLAGS; mib[5] = RTF_LLDATA; if (prog_sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) err(1, "sysctl(PF_ROUTE estimate)"); if (needed > 0) { if ((buf = malloc(needed)) == NULL) err(1, "malloc"); if (prog_sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { free(buf); if (errno == ENOBUFS) goto again; err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)"); } lim = buf + needed; } else buf = lim = NULL; for (next = buf; next && next < lim; next += rtm->rtm_msglen) { int isrouter = 0, prbs = 0; rtm = (struct rt_msghdr *)(void *)next; mysin = (struct sockaddr_in6 *)(void *)(rtm + 1); sdl = (struct sockaddr_dl *)(void *)((char *)(void *)mysin + RT_ROUNDUP(mysin->sin6_len)); /* * Some OSes can produce a route that has the LINK flag but * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD * and BSD/OS, where xx is not the interface identifier on * lo0). Such routes entry would annoy getnbrinfo() below, * so we skip them. * XXX: such routes should have the GATEWAY flag, not the * LINK flag. However, there is rotten routing software * that advertises all routes that have the GATEWAY flag. * Thus, KAME kernel intentionally does not set the LINK flag. * What is to be fixed is not ndp, but such routing software * (and the kernel workaround)... */ if (sdl->sdl_family != AF_LINK) continue; if (!(rtm->rtm_flags & RTF_HOST)) continue; if (addr) { if (!IN6_ARE_ADDR_EQUAL(addr, &mysin->sin6_addr)) continue; found_entry = 1; } else if (IN6_IS_ADDR_MULTICAST(&mysin->sin6_addr)) continue; if (dflag) { (void)delete(rtm, host_buf); continue; } if (IN6_IS_ADDR_LINKLOCAL(&mysin->sin6_addr) || IN6_IS_ADDR_MC_LINKLOCAL(&mysin->sin6_addr)) { uint16_t scopeid = mysin->sin6_scope_id; inet6_getscopeid(mysin, INET6_IS_ADDR_LINKLOCAL| INET6_IS_ADDR_MC_LINKLOCAL); if (scopeid == 0) mysin->sin6_scope_id = sdl->sdl_index; } (void)getnameinfo((struct sockaddr *)(void *)mysin, (socklen_t)mysin->sin6_len, host_buf, sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0)); if (cflag) { /* Restore scopeid */ if (IN6_IS_ADDR_LINKLOCAL(&mysin->sin6_addr) || IN6_IS_ADDR_MC_LINKLOCAL(&mysin->sin6_addr)) inet6_putscopeid(mysin, INET6_IS_ADDR_LINKLOCAL| INET6_IS_ADDR_MC_LINKLOCAL); if ((rtm->rtm_flags & RTF_STATIC) == 0) (void)delete(rtm, host_buf); continue; } (void)gettimeofday(&tim, 0); if (tflag) ts_print(&tim); addrwidth = strlen(host_buf); if (addrwidth < W_ADDR) addrwidth = W_ADDR; llwidth = strlen(ether_str(sdl)); if (W_ADDR + W_LL - addrwidth > llwidth) llwidth = W_ADDR + W_LL - addrwidth; ifname = if_indextoname((unsigned int)sdl->sdl_index, ifix_buf); if (!ifname) ifname = "?"; ifwidth = strlen(ifname); if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth) ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth; (void)printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf, llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname); /* Print neighbor discovery specific informations */ nbi = getnbrinfo(&mysin->sin6_addr, (unsigned int)sdl->sdl_index, 1); if (nbi) { if (nbi->expire > tim.tv_sec) { (void)printf(" %-9.9s", sec2str(nbi->expire - tim.tv_sec)); } else if (nbi->expire == 0) (void)printf(" %-9.9s", "permanent"); else (void)printf(" %-9.9s", "expired"); switch (nbi->state) { case ND_LLINFO_NOSTATE: (void)printf(" N"); break; case ND_LLINFO_WAITDELETE: (void)printf(" W"); break; case ND_LLINFO_INCOMPLETE: (void)printf(" I"); break; case ND_LLINFO_REACHABLE: (void)printf(" R"); break; case ND_LLINFO_STALE: (void)printf(" S"); break; case ND_LLINFO_DELAY: (void)printf(" D"); break; case ND_LLINFO_PROBE: (void)printf(" P"); break; case ND_LLINFO_UNREACHABLE: (void)printf(" U"); break; default: (void)printf(" ?"); break; } isrouter = nbi->isrouter; prbs = nbi->asked; } else { warnx("failed to get neighbor information"); (void)printf(" "); } /* * other flags. R: router, P: proxy, W: ?? */ fl = flgbuf; if (isrouter) *fl++ = 'R'; if (rtm->rtm_flags & RTF_ANNOUNCE) *fl++ = 'p'; *fl++ = '\0'; (void)printf(" %s", flgbuf); if (prbs) (void)printf(" %d", prbs); (void)printf("\n"); } if (buf != NULL) free(buf); if (repeat) { (void)printf("\n"); (void)fflush(stdout); (void)sleep(repeat); goto again; } } static struct in6_nbrinfo * getnbrinfo(struct in6_addr *addr, unsigned int ifindex, int warning) { static struct in6_nbrinfo nbi; int s; if ((s = prog_socket(AF_INET6, SOCK_DGRAM, 0)) < 0) err(1, "socket"); (void)memset(&nbi, 0, sizeof(nbi)); (void)if_indextoname(ifindex, nbi.ifname); nbi.addr = *addr; if (prog_ioctl(s, SIOCGNBRINFO_IN6, &nbi) < 0) { if (warning) warn("ioctl(SIOCGNBRINFO_IN6)"); (void)prog_close(s); return(NULL); } (void)prog_close(s); return(&nbi); } static char * ether_str(struct sockaddr_dl *sdl) { static char hbuf[NI_MAXHOST]; if (sdl->sdl_alen) { if (getnameinfo((struct sockaddr *)(void *)sdl, (socklen_t)sdl->sdl_len, hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) (void)snprintf(hbuf, sizeof(hbuf), ""); } else (void)snprintf(hbuf, sizeof(hbuf), "(incomplete)"); return(hbuf); } static int ndp_ether_aton(char *a, u_char *n) { int i, o[6]; i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2], &o[3], &o[4], &o[5]); if (i != 6) { warnx("invalid Ethernet address '%s'", a); return (1); } for (i = 0; i < 6; i++) n[i] = o[i]; return (0); } static void usage(void) { const char *pn = getprogname(); (void)fprintf(stderr, "Usage: %s [-nt] hostname\n", pn); (void)fprintf(stderr, " %s [-nt] -a | -c\n", pn); (void)fprintf(stderr, " %s [-nt] -A wait\n", pn); (void)fprintf(stderr, " %s [-nt] -d hostname\n", pn); (void)fprintf(stderr, " %s [-nt] -f filename\n", pn); (void)fprintf(stderr, " %s [-nt] -i interface [flags...]\n", pn); (void)fprintf(stderr, " %s [-nt] -s nodename etheraddr [temp] [proxy]\n", pn); exit(1); } static int rtmsg(int cmd, struct rt_msghdr *_rtm) { static int seq; register struct rt_msghdr *rtm = _rtm; register char *cp = m_rtmsg.m_space; register int l; errno = 0; if (rtm != NULL) { memcpy(&m_rtmsg, rtm, rtm->rtm_msglen); rtm = &m_rtmsg.m_rtm; goto doit; } (void)memset(&m_rtmsg, 0, sizeof(m_rtmsg)); rtm = &m_rtmsg.m_rtm; rtm->rtm_flags = flags; rtm->rtm_version = RTM_VERSION; switch (cmd) { default: errx(1, "internal wrong cmd"); /*NOTREACHED*/ case RTM_ADD: rtm->rtm_addrs |= RTA_GATEWAY; if (expire_time) { rtm->rtm_rmx.rmx_expire = expire_time; rtm->rtm_inits = RTV_EXPIRE; } rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA); #ifdef notdef /* we don't support ipv6addr/128 type proxying. */ if (rtm->rtm_flags & RTF_ANNOUNCE) { rtm->rtm_flags &= ~RTF_HOST; rtm->rtm_addrs |= RTA_NETMASK; } #endif rtm->rtm_addrs |= RTA_DST; break; case RTM_GET: rtm->rtm_flags |= RTF_LLDATA; rtm->rtm_addrs |= RTA_DST | RTA_GATEWAY; } #define NEXTADDR(w, s) \ if (rtm->rtm_addrs & (w)) { \ (void)memcpy(cp, &s, sizeof(s)); \ RT_ADVANCE(cp, (struct sockaddr *)(void *)&s); \ } NEXTADDR(RTA_DST, sin_m); NEXTADDR(RTA_GATEWAY, sdl_m); #ifdef notdef /* we don't support ipv6addr/128 type proxying. */ (void)memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr)); NEXTADDR(RTA_NETMASK, so_mask); #endif rtm->rtm_msglen = cp - (char *)(void *)&m_rtmsg; doit: l = rtm->rtm_msglen; rtm->rtm_seq = ++seq; rtm->rtm_type = cmd; if (prog_write(my_s, &m_rtmsg, (size_t)l) == -1) { if (errno != ESRCH || cmd != RTM_DELETE) err(1, "writing to routing socket"); } do { l = prog_read(my_s, &m_rtmsg, sizeof(m_rtmsg)); } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid)); if (l < 0) warn("read from routing socket"); return (0); } static void ifinfo(char *ifname, int argc, char **argv) { struct in6_ndireq nd; int i, s; u_int32_t newflags; bool valset = false, flagset = false; if ((s = prog_socket(AF_INET6, SOCK_DGRAM, 0)) < 0) err(1, "socket"); (void)memset(&nd, 0, sizeof(nd)); (void)strlcpy(nd.ifname, ifname, sizeof(nd.ifname)); if (prog_ioctl(s, SIOCGIFINFO_IN6, &nd) < 0) err(1, "ioctl(SIOCGIFINFO_IN6)"); #define ND nd.ndi newflags = ND.flags; for (i = 0; i < argc; i++) { int clear = 0; char *cp = argv[i]; if (*cp == '-') { clear = 1; cp++; } #define SETFLAG(s, f) \ do {\ if (strcmp(cp, (s)) == 0) {\ if (clear)\ newflags &= ~(f);\ else\ newflags |= (f);\ flagset = true; \ }\ } while (0) /* * XXX: this macro is not 100% correct, in that it matches "nud" against * "nudbogus". But we just let it go since this is minor. */ #define SETVALUE(f, v) \ do { \ char *valptr; \ unsigned long newval; \ v = 0; /* unspecified */ \ if (strncmp(cp, f, strlen(f)) == 0) { \ valptr = strchr(cp, '='); \ if (valptr == NULL) \ err(1, "syntax error in %s field", (f)); \ errno = 0; \ newval = strtoul(++valptr, NULL, 0); \ if (errno) \ err(1, "syntax error in %s's value", (f)); \ v = newval; \ valset = true; \ } \ } while (0) #ifdef ND6_IFF_IFDISABLED SETFLAG("disabled", ND6_IFF_IFDISABLED); #endif SETFLAG("nud", ND6_IFF_PERFORMNUD); #ifdef ND6_IFF_ACCEPT_RTADV SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV); #endif #ifdef ND6_IFF_OVERRIDE_RTADV SETFLAG("override_rtadv", ND6_IFF_OVERRIDE_RTADV); #endif #ifdef ND6_IFF_AUTO_LINKLOCAL SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL); #endif #ifdef ND6_IFF_PREFER_SOURCE SETFLAG("prefer_source", ND6_IFF_PREFER_SOURCE); #endif #ifdef ND6_IFF_DONT_SET_IFROUTE SETFLAG("dont_set_ifroute", ND6_IFF_DONT_SET_IFROUTE); #endif SETVALUE("basereachable", ND.basereachable); SETVALUE("retrans", ND.retrans); SETVALUE("curhlim", ND.chlim); ND.flags = newflags; #ifdef SIOCSIFINFO_IN6 if (valset && prog_ioctl(s, SIOCSIFINFO_IN6, &nd) < 0) err(1, "ioctl(SIOCSIFINFO_IN6)"); #endif if (flagset && prog_ioctl(s, SIOCSIFINFO_FLAGS, &nd) < 0) err(1, "ioctl(SIOCSIFINFO_FLAGS)"); #undef SETFLAG #undef SETVALUE } if (prog_ioctl(s, SIOCGIFINFO_IN6, &nd) < 0) err(1, "ioctl(SIOCGIFINFO_IN6)"); (void)printf("curhlim=%d", ND.chlim); (void)printf(", basereachable=%ds%dms", ND.basereachable / 1000, ND.basereachable % 1000); (void)printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000); if (ND.flags) { (void)printf("\nFlags: "); if ((ND.flags & ND6_IFF_PERFORMNUD)) (void)printf("nud "); #ifdef ND6_IFF_IFDISABLED if ((ND.flags & ND6_IFF_IFDISABLED)) (void)printf("disabled "); #endif #ifdef ND6_IFF_AUTO_LINKLOCAL if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL)) (void)printf("auto_linklocal "); #endif #ifdef ND6_IFF_PREFER_SOURCE if ((ND.flags & ND6_IFF_PREFER_SOURCE)) (void)printf("prefer_source "); #endif } (void)putc('\n', stdout); #undef ND (void)prog_close(s); } static const char * sec2str(time_t total) { static char result[256]; int days, hours, mins, secs; int first = 1; char *p = result; char *ep = &result[sizeof(result)]; int n; days = total / 3600 / 24; hours = (total / 3600) % 24; mins = (total / 60) % 60; secs = total % 60; if (days) { first = 0; n = snprintf(p, (size_t)(ep - p), "%dd", days); if (n < 0 || n >= ep - p) return "?"; p += n; } if (!first || hours) { first = 0; n = snprintf(p, (size_t)(ep - p), "%dh", hours); if (n < 0 || n >= ep - p) return "?"; p += n; } if (!first || mins) { first = 0; n = snprintf(p, (size_t)(ep - p), "%dm", mins); if (n < 0 || n >= ep - p) return "?"; p += n; } (void)snprintf(p, (size_t)(ep - p), "%ds", secs); return(result); } /* * Print the timestamp * from tcpdump/util.c */ static void ts_print(const struct timeval *tvp) { int s; /* Default */ s = (tvp->tv_sec + thiszone) % 86400; (void)printf("%02d:%02d:%02d.%06u ", s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec); }