/* * Copyright (c) 1983, 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. * * $FreeBSD: src/sbin/ifconfig/ifconfig.c,v 1.113.2.4 2006/02/09 10:48:43 yar Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* IP */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ifconfig.h" /* Globals */ char IfName[IFNAMSIZ]; /* name of interface */ bool newaddr = true; bool verbose; bool supmedia = false; bool printkeys = false; /* Print keying material for interfaces. */ bool printifname = false; /* Print the name of the created interface. */ int exit_code = 0; char *f_inet, *f_inet6, *f_ether, *f_addr; /* Formatter strings */ static bool group_member(const char *ifname, const char *match, const char *nomatch); static int ifconfig(int argc, char *const *argv, int iscreate, const struct afswtch *afp); static void status(const struct afswtch *afp, const struct sockaddr_dl *sdl, struct ifaddrs *ifa); static void tunnel_status(int s); static void usage(void) __dead2; static int getifflags(const char *ifname, int us); static struct afswtch *af_getbyname(const char *name); static struct afswtch *af_getbyfamily(int af); static void af_other_status(int); static void printifnamemaybe(void); static void freeformat(void); static void setformat(char *input); static struct option *opts = NULL; static char *descr = NULL; static size_t descrlen = 64; static bool clearaddr; static int doalias; static bool noload; static bool setaddr; static bool setmask; struct ifa_order_elt { int if_order; int af_orders[255]; struct ifaddrs *ifa; TAILQ_ENTRY(ifa_order_elt) link; }; TAILQ_HEAD(ifa_queue, ifa_order_elt); static int calcorders(struct ifaddrs *ifa, struct ifa_queue *q); static int cmpifaddrs(struct ifaddrs *a, struct ifaddrs *b, struct ifa_queue *q); typedef int (*ifaddrs_cmp)(struct ifaddrs *, struct ifaddrs *, struct ifa_queue *); static struct ifaddrs *sortifaddrs(struct ifaddrs *list, ifaddrs_cmp compare, struct ifa_queue *q); void opt_register(struct option *p) { p->next = opts; opts = p; } static void usage(void) { char options[1024]; struct option *p; /* XXX not right but close enough for now */ options[0] = '\0'; for (p = opts; p != NULL; p = p->next) { strlcat(options, p->opt_usage, sizeof(options)); strlcat(options, " ", sizeof(options)); } fprintf(stderr, "usage: ifconfig %s[-n] [-f type:format] interface address_family\n" " [address [dest_address]] [parameters]\n" " ifconfig [-n] interface create\n" " ifconfig [-n] interface destroy\n" " ifconfig -a %s[-G nogroup] [-d | -u] [-m] [-v] [address_family]\n" " ifconfig -l [-d | -u] [address_family]\n" " ifconfig %s[-d | -u] [-m] [-v]\n", options, options, options); exit(1); } static int calcorders(struct ifaddrs *ifa, struct ifa_queue *q) { struct ifaddrs *prev; struct ifa_order_elt *cur; unsigned int ord, af, ifa_ord; prev = NULL; cur = NULL; ord = 0; ifa_ord = 0; while (ifa != NULL) { if (prev == NULL || strcmp(ifa->ifa_name, prev->ifa_name) != 0) { cur = calloc(1, sizeof(*cur)); if (cur == NULL) return (-1); TAILQ_INSERT_TAIL(q, cur, link); cur->if_order = ifa_ord++; cur->ifa = ifa; ord = 0; } if (ifa->ifa_addr) { af = ifa->ifa_addr->sa_family; if (af < nitems(cur->af_orders) && cur->af_orders[af] == 0) cur->af_orders[af] = ++ord; } prev = ifa; ifa = ifa->ifa_next; } return (0); } static int cmpifaddrs(struct ifaddrs *a, struct ifaddrs *b, struct ifa_queue *q) { struct ifa_order_elt *cur, *e1, *e2; unsigned int af1, af2; e1 = e2 = NULL; if (strcmp(a->ifa_name, b->ifa_name) != 0) { TAILQ_FOREACH(cur, q, link) { if (e1 != NULL && e2 != NULL) break; if (strcmp(cur->ifa->ifa_name, a->ifa_name) == 0) e1 = cur; else if (strcmp(cur->ifa->ifa_name, b->ifa_name) == 0) e2 = cur; } if (e1 == NULL || e2 == NULL) return (0); else return (e1->if_order - e2->if_order); } else if (a->ifa_addr != NULL && b->ifa_addr != NULL) { TAILQ_FOREACH(cur, q, link) { if (strcmp(cur->ifa->ifa_name, a->ifa_name) == 0) { e1 = cur; break; } } if (e1 == NULL) return (0); af1 = a->ifa_addr->sa_family; af2 = b->ifa_addr->sa_family; if (af1 < nitems(e1->af_orders) && af2 < nitems(e1->af_orders)) return (e1->af_orders[af1] - e1->af_orders[af2]); } return (0); } static struct ifaddrs * sortifaddrs(struct ifaddrs *list, ifaddrs_cmp compare, struct ifa_queue *q) { struct ifaddrs *right, *temp, *last, *result, *next, *tail; right = temp = last = list; result = next = tail = NULL; if (list == NULL || list->ifa_next == NULL) return (list); while (temp != NULL && temp->ifa_next != NULL) { last = right; right = right->ifa_next; temp = temp->ifa_next->ifa_next; } last->ifa_next = NULL; list = sortifaddrs(list, compare, q); right = sortifaddrs(right, compare, q); while (list != NULL || right != NULL) { if (right == NULL) { next = list; list = list->ifa_next; } else if (list == NULL) { next = right; right = right->ifa_next; } else if (compare(list, right, q) <= 0) { next = list; list = list->ifa_next; } else { next = right; right = right->ifa_next; } if (result == NULL) result = next; else tail->ifa_next = next; tail = next; } return (result); } static void printifnamemaybe(void) { if (printifname) printf("%s\n", IfName); } static void freeformat(void) { if (f_inet != NULL) free(f_inet); if (f_inet6 != NULL) free(f_inet6); if (f_ether != NULL) free(f_ether); if (f_addr != NULL) free(f_addr); } static void setformat(char *input) { char *formatstr, *category, *modifier; char **fp; formatstr = strdup(input); if (formatstr == NULL) err(1, "no memory to set format"); while ((category = strsep(&formatstr, ",")) != NULL) { modifier = strchr(category, ':'); if (modifier == NULL || modifier[1] == '\0') { warnx("skip invalid format specification: %s\n", category); continue; } modifier[0] = '\0'; modifier++; fp = NULL; if (strcmp(category, "addr") == 0) fp = &f_addr; else if (strcmp(category, "ether") == 0) fp = &f_ether; else if (strcmp(category, "inet") == 0) fp = &f_inet; else if (strcmp(category, "inet6") == 0) fp = &f_inet6; if (fp != NULL) { *fp = strdup(modifier); if (*fp == NULL) err(1, "strdup"); } } free(formatstr); } int main(int argc, char *argv[]) { int c, ifindex, flags; bool all, namesonly, downonly, uponly; const struct afswtch *afp = NULL; const struct sockaddr_dl *sdl; const char *ifname, *matchgroup, *nogroup; struct ifa_order_elt *cur, *tmp; struct ifa_queue q = TAILQ_HEAD_INITIALIZER(q); struct ifaddrs *ifap, *sifap, *ifa; struct ifreq ifr; struct option *p; size_t iflen; char *envformat, *cp; char options[1024]; doalias = 0; all = downonly = uponly = namesonly = verbose = false; clearaddr = noload = setaddr = setmask = false; f_inet = f_inet6 = f_ether = f_addr = NULL; matchgroup = nogroup = NULL; /* * Ensure we print interface name when expected to, * even if we terminate early due to error. */ atexit(printifnamemaybe); envformat = getenv("IFCONFIG_FORMAT"); if (envformat != NULL) setformat(envformat); /* Parse leading line options */ strlcpy(options, "adf:G:klmnuv", sizeof(options)); for (p = opts; p != NULL; p = p->next) strlcat(options, p->opt, sizeof(options)); while ((c = getopt(argc, argv, options)) != -1) { switch (c) { case 'a': /* scan all interfaces */ all = true; break; case 'd': /* restrict scan to "down" interfaces */ downonly = true; break; case 'f': setformat(optarg); break; case 'G': if (!all) usage(); nogroup = optarg; break; case 'k': printkeys = true; break; case 'l': /* scan interface names only */ namesonly = true; break; case 'm': /* show media choices in status */ supmedia = true; break; case 'n': /* suppress module loading */ noload = true; break; case 'u': /* restrict scan to "up" interfaces */ uponly = true; break; case 'v': verbose = true; break; case 'g': if (all) { matchgroup = optarg; break; } /* FALLTHROUGH */ default: for (p = opts; p != NULL; p = p->next) if (p->opt[0] == c) { p->cb(optarg); break; } if (p == NULL) usage(); break; } } argc -= optind; argv += optind; /* -l cannot be used with -a or -m */ if (namesonly && (all || supmedia)) usage(); /* nonsense.. */ if (uponly && downonly) usage(); /* no arguments is equivalent to '-a' */ if (!namesonly && argc < 1) all = 1; /* -a and -l allow an address family arg to limit the output */ if (all || namesonly) { if (argc > 1) usage(); ifname = NULL; ifindex = 0; if (argc == 1) { afp = af_getbyname(*argv); if (afp == NULL) usage(); if (afp->af_name != NULL) argc--, argv++; /* leave with afp non-zero */ } } else { /* not listing, need an argument */ if (argc < 1) usage(); ifname = *argv; argc--, argv++; /* check and maybe load support for this interface */ ifmaybeload(ifname); ifindex = if_nametoindex(ifname); if (ifindex == 0) { /* * NOTE: We must special-case the `create' command * right here as we would otherwise fail when trying * to find the interface. */ if (argc > 0 && (strcmp(argv[0], "create") == 0 || strcmp(argv[0], "plumb") == 0)) { iflen = strlcpy(IfName, ifname, sizeof(IfName)); if (iflen >= sizeof(IfName)) errx(1, "%s: cloning name too long", ifname); ifconfig(argc, argv, 1, NULL); exit(exit_code); } errx(1, "interface %s does not exist", ifname); } else { /* * Do not allow to use `create` command as hostname * if address family is not specified. */ if (argc > 0 && (strcmp(argv[0], "create") == 0 || strcmp(argv[0], "plumb") == 0)) { if (argc == 1) errx(1, "interface %s already exists", ifname); argc--, argv++; } } } /* Check for address family */ if (argc > 0) { afp = af_getbyname(*argv); if (afp != NULL) argc--, argv++; } /* * Check for a requested configuration action on a single interface, * which doesn't require building, sorting, and searching the entire * system address list. */ if (argc > 0 && ifname != NULL) { iflen = strlcpy(IfName, ifname, sizeof(IfName)); if (iflen >= sizeof(IfName)) errx(1, "%s: cloning name too long", ifname); flags = getifflags(IfName, -1); if (!((downonly && (flags & IFF_UP) != 0) || (uponly && (flags & IFF_UP) == 0))) { ifconfig(argc, argv, 0, afp); } exit(exit_code); } if (getifaddrs(&ifap) != 0) err(1, "getifaddrs"); if (calcorders(ifap, &q) != 0) err(1, "calcorders"); sifap = sortifaddrs(ifap, cmpifaddrs, &q); TAILQ_FOREACH_MUTABLE(cur, &q, link, tmp) free(cur); cp = NULL; ifindex = 0; for (ifa = sifap; ifa != NULL; ifa = ifa->ifa_next) { memset(&ifr, 0, sizeof(ifr)); strlcpy(ifr.ifr_name, ifa->ifa_name, sizeof(ifr.ifr_name)); if (sizeof(ifr.ifr_addr) >= ifa->ifa_addr->sa_len) { memcpy(&ifr.ifr_addr, ifa->ifa_addr, ifa->ifa_addr->sa_len); } if (ifname != NULL && strcmp(ifname, ifa->ifa_name) != 0) continue; if (cp != NULL && strcmp(cp, ifa->ifa_name) == 0) continue; iflen = strlcpy(IfName, ifa->ifa_name, sizeof(IfName)); if (iflen >= sizeof(IfName)) { warnx("%s: interface name too long, skipping", ifa->ifa_name); continue; } cp = ifa->ifa_name; if (downonly && (ifa->ifa_flags & IFF_UP) != 0) continue; if (uponly && (ifa->ifa_flags & IFF_UP) == 0) continue; if (!group_member(ifa->ifa_name, matchgroup, nogroup)) continue; if (ifa->ifa_addr->sa_family == AF_LINK) sdl = (const struct sockaddr_dl *)ifa->ifa_addr; else sdl = NULL; /* Are we just listing the interfaces? */ if (namesonly) { if (afp == NULL || afp->af_af != AF_LINK || (sdl != NULL && sdl->sdl_type == IFT_ETHER)) { printf("%s%s", (ifindex > 0 ? " " : ""), IfName); ifindex++; } continue; } if (argc > 0) ifconfig(argc, argv, 0, afp); else status(afp, sdl, ifa); } if (namesonly) putchar('\n'); freeifaddrs(ifap); freeformat(); return (exit_code); } /* * Returns true if an interface should be listed because any its groups * matches shell pattern "match" and none of groups matches pattern "nomatch". * If any pattern is NULL, corresponding condition is skipped. */ static bool group_member(const char *ifname, const char *match, const char *nomatch) { static int sock = -1; struct ifgroupreq ifgr; struct ifg_req *ifg; size_t len; bool matched, nomatched; /* Sanity checks. */ if (match == NULL && nomatch == NULL) return (true); if (ifname == NULL) return (false); memset(&ifgr, 0, sizeof(ifgr)); strlcpy(ifgr.ifgr_name, ifname, sizeof(ifgr.ifgr_name)); /* The socket is opened once. Let _exit() close it. */ if (sock == -1) { sock = socket(AF_LOCAL, SOCK_DGRAM, 0); if (sock == -1) errx(1, "%s: socket(AF_LOCAL,SOCK_DGRAM)", __func__); } /* Determine amount of memory for the list of groups. */ if (ioctl(sock, SIOCGIFGROUP, &ifgr) == -1) { if (errno == EINVAL || errno == ENOTTY) return (false); else errx(1, "%s: SIOCGIFGROUP", __func__); } /* Obtain the list of groups. */ len = ifgr.ifgr_len; ifgr.ifgr_groups = calloc(1, len); if (ifgr.ifgr_groups == NULL) errx(1, "%s: no memory", __func__); if (ioctl(sock, SIOCGIFGROUP, &ifgr) == -1) errx(1, "%s: SIOCGIFGROUP", __func__); /* Perform matching. */ matched = false; nomatched = true; for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(*ifg); ifg++) { len -= sizeof(struct ifg_req); if (match) matched |= !fnmatch(match, ifg->ifgrq_group, 0); if (nomatch) nomatched &= fnmatch(nomatch, ifg->ifgrq_group, 0); } if (match && !nomatch) return (matched); if (!match && nomatch) return (nomatched); return (matched && nomatched); } static struct afswtch *afs = NULL; void af_register(struct afswtch *p) { p->af_next = afs; afs = p; } static struct afswtch * af_getbyname(const char *name) { struct afswtch *afp; for (afp = afs; afp != NULL; afp = afp->af_next) if (strcmp(afp->af_name, name) == 0) return afp; return NULL; } static struct afswtch * af_getbyfamily(int af) { struct afswtch *afp; for (afp = afs; afp != NULL; afp = afp->af_next) if (afp->af_af == af) return afp; return NULL; } static void af_other_status(int s) { struct afswtch *afp; uint8_t afmask[howmany(AF_MAX, NBBY)]; memset(afmask, 0, sizeof(afmask)); for (afp = afs; afp != NULL; afp = afp->af_next) { if (afp->af_other_status == NULL) continue; if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) continue; afp->af_other_status(s); setbit(afmask, afp->af_af); } } static void af_all_tunnel_status(int s) { struct afswtch *afp; uint8_t afmask[howmany(AF_MAX, NBBY)]; memset(afmask, 0, sizeof(afmask)); for (afp = afs; afp != NULL; afp = afp->af_next) { if (afp->af_status_tunnel == NULL) continue; if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) continue; afp->af_status_tunnel(s); setbit(afmask, afp->af_af); } } static struct cmd *cmds = NULL; void cmd_register(struct cmd *p) { p->c_next = cmds; cmds = p; } static const struct cmd * cmd_lookup(const char *name, int iscreate) { const struct cmd *p; for (p = cmds; p != NULL; p = p->c_next) { if (strcmp(name, p->c_name) == 0) { if (iscreate) { if (p->c_iscloneop) return p; } else { if (!p->c_iscloneop) return p; } } } return NULL; } struct callback { callback_func *cb_func; void *cb_arg; struct callback *cb_next; }; static struct callback *callbacks = NULL; void callback_register(callback_func *func, void *arg) { struct callback *cb; cb = malloc(sizeof(struct callback)); if (cb == NULL) errx(1, "unable to allocate memory for callback"); cb->cb_func = func; cb->cb_arg = arg; cb->cb_next = callbacks; callbacks = cb; } /* specially-handled commands */ static void setifaddr(const char *, int, int, const struct afswtch *); static const struct cmd setifaddr_cmd = DEF_CMD("ifaddr", 0, setifaddr); static void setifdstaddr(const char *, int, int, const struct afswtch *); static const struct cmd setifdstaddr_cmd = DEF_CMD("ifdstaddr", 0, setifdstaddr); static int ifconfig(int argc, char *const *argv, int iscreate, const struct afswtch *uafp) { const struct afswtch *afp, *nafp; const struct cmd *p; struct ifreq ifr; struct callback *cb; int s; memset(&ifr, 0, sizeof(ifr)); strlcpy(ifr.ifr_name, IfName, sizeof(ifr.ifr_name)); afp = uafp != NULL ? uafp : af_getbyname("inet"); top: ifr.ifr_addr.sa_family = afp->af_af == AF_LINK || afp->af_af == AF_UNSPEC ? AF_LOCAL : afp->af_af; if ((s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0)) < 0 && (uafp != NULL || errno != EAFNOSUPPORT || (s = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0)) err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family); while (argc > 0) { p = cmd_lookup(*argv, iscreate); if (iscreate && p == NULL) { /* * Push the clone create callback so the new * device is created and can be used for any * remaining arguments. */ cb = callbacks; if (cb == NULL) errx(1, "internal error, no callback"); callbacks = cb->cb_next; cb->cb_func(s, cb->cb_arg); iscreate = 0; /* * Handle any address family spec that * immediately follows and potentially * recreate the socket. */ nafp = af_getbyname(*argv); if (nafp != NULL) { argc--, argv++; if (nafp != afp) { close(s); afp = nafp; goto top; } } /* Look for a normal parameter. */ continue; } if (p == NULL) { /* * Not a recognized command, choose between setting * the interface address and the dst address. */ p = (setaddr ? &setifdstaddr_cmd : &setifaddr_cmd); } if (p->c_u.c_func || p->c_u.c_func2) { if (p->c_parameter == NEXTARG) { if (argv[1] == NULL) errx(1, "'%s' requires argument", p->c_name); p->c_u.c_func(argv[1], 0, s, afp); argc--, argv++; } else if (p->c_parameter == OPTARG) { p->c_u.c_func(argv[1], 0, s, afp); if (argv[1] != NULL) argc--, argv++; } else if (p->c_parameter == NEXTARG2) { if (argc < 3) errx(1, "'%s' requires 2 arguments", p->c_name); p->c_u.c_func2(argv[1], argv[2], s, afp); argc -= 2, argv += 2; } else p->c_u.c_func(*argv, p->c_parameter, s, afp); } argc--, argv++; } /* * Do any post argument processing required by the address family. */ if (afp->af_postproc != NULL) afp->af_postproc(s, afp); /* * Do deferred callbacks registered while processing * command-line arguments. */ for (cb = callbacks; cb != NULL; cb = cb->cb_next) cb->cb_func(s, cb->cb_arg); /* * Do deferred operations. */ if (clearaddr) { if (afp->af_ridreq == NULL || afp->af_difaddr == 0) { warnx("interface %s cannot change %s addresses!", IfName, afp->af_name); clearaddr = false; } } if (clearaddr) { /* NOTE: Don't use sizeof because af_ridreq is 'void *'. */ strlcpy(afp->af_ridreq, IfName, IFNAMSIZ); if (ioctl(s, afp->af_difaddr, afp->af_ridreq) < 0) { if (errno == EADDRNOTAVAIL && doalias >= 0) { /* means no previous address for interface */ } else Perror("ioctl (SIOCDIFADDR)"); } } if (newaddr) { if (afp->af_addreq == NULL || afp->af_aifaddr == 0) { warnx("interface %s cannot change %s addresses!", IfName, afp->af_name); newaddr = false; } } if (newaddr && (setaddr || setmask)) { /* NOTE: Don't use sizeof because af_addreq is 'void *'. */ strlcpy(afp->af_addreq, IfName, IFNAMSIZ); if (ioctl(s, afp->af_aifaddr, afp->af_addreq) < 0) Perror("ioctl (SIOCAIFADDR)"); } close(s); return (0); } static void setifaddr(const char *addr, int dummy __unused, int s __unused, const struct afswtch *afp) { if (afp->af_getaddr == NULL) return; /* * Delay the ioctl to set the interface addr until flags are all set. * The address interpretation may depend on the flags, * and the flags may change when the address is set. */ setaddr = true; if (doalias == 0 && afp->af_af != AF_LINK) clearaddr = true; afp->af_getaddr(addr, (doalias >= 0 ? ADDR : RIDADDR)); } static void settunnel(const char *src, const char *dst, int s, const struct afswtch *afp) { struct addrinfo *srcres, *dstres; int ecode; if (afp->af_settunnel == NULL) { warn("address family %s does not support tunnel setup", afp->af_name); return; } if ((ecode = getaddrinfo(src, NULL, NULL, &srcres)) != 0) errx(1, "error in parsing address string: %s", gai_strerror(ecode)); if ((ecode = getaddrinfo(dst, NULL, NULL, &dstres)) != 0) errx(1, "error in parsing address string: %s", gai_strerror(ecode)); if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family) errx(1, "source and destination address families do not match"); afp->af_settunnel(s, srcres, dstres); freeaddrinfo(srcres); freeaddrinfo(dstres); } static void deletetunnel(const char *arg __unused, int dummy __unused, int s, const struct afswtch *afp __unused) { struct ifreq ifr; memset(&ifr, 0, sizeof(ifr)); strlcpy(ifr.ifr_name, IfName, sizeof(ifr.ifr_name)); if (ioctl(s, SIOCDIFPHYADDR, &ifr) < 0) err(1, "SIOCDIFPHYADDR"); } static void setifnetmask(const char *addr, int dummy __unused, int s __unused, const struct afswtch *afp) { if (afp->af_getaddr != NULL) { setmask = true; afp->af_getaddr(addr, MASK); } } static void setifbroadaddr(const char *addr, int dummy __unused, int s __unused, const struct afswtch *afp) { if (afp->af_getaddr != NULL) afp->af_getaddr(addr, DSTADDR); } static void notealias(const char *addr __unused, int param, int s __unused, const struct afswtch *afp) { #define rqtosa(x) (&(((struct ifreq *)(afp->x))->ifr_addr)) if (setaddr && doalias == 0 && param < 0) { if (afp->af_addreq != NULL && afp->af_ridreq != NULL) memcpy(rqtosa(af_ridreq), rqtosa(af_addreq), rqtosa(af_addreq)->sa_len); } #undef rqtosa doalias = param; if (param < 0) { clearaddr = true; newaddr = false; } else { clearaddr = false; } } static void setifdstaddr(const char *addr, int dummy __unused, int s __unused, const struct afswtch *afp __unused) { if (afp->af_getaddr != NULL) afp->af_getaddr(addr, DSTADDR); } static int getifflags(const char *ifname, int us) { struct ifreq ifr; int s; memset(&ifr, 0, sizeof(ifr)); strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); s = us; if (us < 0) { if ((s = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0) err(1, "socket(family AF_LOCAL,SOCK_DGRAM)"); } if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) Perror("ioctl (SIOCGIFFLAGS)"); if (us < 0) close(s); return ((ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16)); } static void setifflags(const char *vname, int value, int s, const struct afswtch *afp __unused) { struct ifreq ifr; int flags; flags = getifflags(IfName, s); if (value < 0) { value = -value; flags &= ~value; } else { flags |= value; } memset(&ifr, 0, sizeof(ifr)); strlcpy(ifr.ifr_name, IfName, sizeof(ifr.ifr_name)); ifr.ifr_flags = flags & 0xffff; ifr.ifr_flagshigh = flags >> 16; if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) Perror(vname); } void setifcap(const char *vname, int value, int s, const struct afswtch *afp __unused) { struct ifreq ifr; int flags; memset(&ifr, 0, sizeof(ifr)); strlcpy(ifr.ifr_name, IfName, sizeof(ifr.ifr_name)); if (ioctl(s, SIOCGIFCAP, &ifr) < 0) Perror("ioctl (SIOCGIFCAP)"); flags = ifr.ifr_curcap; if (value < 0) { value = -value; flags &= ~value; } else { flags |= value; } ifr.ifr_reqcap = flags; if (ioctl(s, SIOCSIFCAP, &ifr) < 0) Perror(vname); } static void setifmetric(const char *val, int dummy __unused, int s, const struct afswtch *afp __unused) { struct ifreq ifr; memset(&ifr, 0, sizeof(ifr)); strlcpy(ifr.ifr_name, IfName, sizeof (ifr.ifr_name)); ifr.ifr_metric = atoi(val); if (ioctl(s, SIOCSIFMETRIC, &ifr) < 0) err(1, "ioctl SIOCSIFMETRIC (set metric)"); } static void setifmtu(const char *val, int dummy __unused, int s, const struct afswtch *afp __unused) { struct ifreq ifr; memset(&ifr, 0, sizeof(ifr)); strlcpy(ifr.ifr_name, IfName, sizeof (ifr.ifr_name)); ifr.ifr_mtu = atoi(val); if (ioctl(s, SIOCSIFMTU, &ifr) < 0) err(1, "ioctl SIOCSIFMTU (set mtu)"); } static void setiftsolen(const char *val, int dummy __unused, int s, const struct afswtch *afp __unused) { struct ifreq ifr; memset(&ifr, 0, sizeof(ifr)); strlcpy(ifr.ifr_name, IfName, sizeof (ifr.ifr_name)); ifr.ifr_tsolen = atoi(val); if (ioctl(s, SIOCSIFTSOLEN, &ifr) < 0) err(1, "ioctl SIOCSIFTSOLEN (set tsolen)"); } static void setifname(const char *val, int dummy __unused, int s, const struct afswtch *afp __unused) { struct ifreq ifr; char newname[IFNAMSIZ]; int n; n = snprintf(newname, sizeof(newname), "%s", val); if (n >= (int)sizeof(newname)) errx(1, "ifname too long"); memset(&ifr, 0, sizeof(ifr)); strlcpy(ifr.ifr_name, IfName, sizeof(ifr.ifr_name)); ifr.ifr_data = newname; if (ioctl(s, SIOCSIFNAME, &ifr) < 0) err(1, "ioctl SIOCSIFNAME (set name)"); printifname = true; strlcpy(IfName, newname, sizeof(IfName)); } static void setifpollcpu(const char *val __unused, int dummy __unused, int s, const struct afswtch *afp) { warnx("pollcpu is deprecated, use polling or npolling instead"); setifflags("npolling", IFF_NPOLLING, s, afp); } static void setifdescr(const char *val, int dummy __unused, int s, const struct afswtch *afp __unused) { struct ifreq ifr; char *newdescr; memset(&ifr, 0, sizeof(ifr)); strlcpy(ifr.ifr_name, IfName, sizeof(ifr.ifr_name)); ifr.ifr_buffer.length = strlen(val) + 1; if (ifr.ifr_buffer.length == 1) { ifr.ifr_buffer.buffer = newdescr = NULL; ifr.ifr_buffer.length = 0; } else { newdescr = strdup(val); ifr.ifr_buffer.buffer = newdescr; if (newdescr == NULL) { warn("no memory to set ifdescr"); return; } } if (ioctl(s, SIOCSIFDESCR, &ifr) < 0) warn("ioctl (set descr)"); free(newdescr); } static void unsetifdescr(const char *val __unused, int dummy __unused, int s, const struct afswtch *afp __unused) { setifdescr("", 0, s, 0); } #define IFFBITS \ "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6SMART\7RUNNING" \ "\10NOARP\11PROMISC\12ALLMULTI\14SIMPLEX\15LINK0\16LINK1\17LINK2" \ "\20MULTICAST\22PPROMISC\23MONITOR\24STATICARP\25NPOLLING\26IDIRECT" #define IFCAPBITS \ "\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7RSS" \ "\10VLAN_HWCSUM\11TSO" /* * Print the status of the interface. If an address family was * specified, show only it; otherwise, show them all. */ static void status(const struct afswtch *afp, const struct sockaddr_dl *sdl __unused, struct ifaddrs *ifa) { struct ifreq ifr; struct ifstat ifs; struct ifaddrs *ift; bool allfamilies; int s; memset(&ifr, 0, sizeof(ifr)); strlcpy(ifr.ifr_name, IfName, sizeof(ifr.ifr_name)); if (afp == NULL) { allfamilies = true; ifr.ifr_addr.sa_family = AF_LOCAL; } else { allfamilies = false; ifr.ifr_addr.sa_family = afp->af_af == AF_LINK ? AF_LOCAL : afp->af_af; } s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0); if (s < 0) err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family); printf("%s: ", IfName); printb("flags", ifa->ifa_flags, IFFBITS); if (ioctl(s, SIOCGIFMETRIC, &ifr) != -1) printf(" metric %d", ifr.ifr_metric); if (ioctl(s, SIOCGIFMTU, &ifr) != -1) printf(" mtu %d", ifr.ifr_mtu); putchar('\n'); for (;;) { if ((descr = reallocf(descr, descrlen)) != NULL) { ifr.ifr_buffer.buffer = descr; ifr.ifr_buffer.length = descrlen; if (ioctl(s, SIOCGIFDESCR, &ifr) == 0) { if (ifr.ifr_buffer.length > 1) printf("\tdescription: %s\n", descr); } else if (errno == ENOMSG) { break; } else if (errno == ENAMETOOLONG) { descrlen = ifr.ifr_buffer.length; continue; } else { warn("ioctl (get descr)"); } } else { warn("unable to allocate memory for interface " "description"); } break; } if (ioctl(s, SIOCGIFCAP, &ifr) == 0) { if (ifr.ifr_curcap != 0) { printb("\toptions", ifr.ifr_curcap, IFCAPBITS); putchar('\n'); } if (supmedia && ifr.ifr_reqcap != 0) { printb("\tcapabilities", ifr.ifr_reqcap, IFCAPBITS); putchar('\n'); if (ifr.ifr_reqcap & IFCAP_TSO) { if (ioctl(s, SIOCGIFTSOLEN, &ifr) == 0) { printf("\ttsolen %d", ifr.ifr_tsolen); putchar('\n'); } } } } tunnel_status(s); for (ift = ifa; ift != NULL; ift = ift->ifa_next) { if (ift->ifa_addr == NULL) continue; if (strcmp(ifa->ifa_name, ift->ifa_name) != 0) continue; if (allfamilies) { const struct afswtch *p; p = af_getbyfamily(ift->ifa_addr->sa_family); if (p != NULL && p->af_status != NULL) p->af_status(s, ift); } else if (afp->af_af == ift->ifa_addr->sa_family) afp->af_status(s, ift); } #if 0 if (allfamilies || afp->af_af == AF_LINK) { const struct afswtch *lafp; /* * Hack; the link level address is received separately * from the routing information so any address is not * handled above. Cobble together an entry and invoke * the status method specially. */ lafp = af_getbyname("lladdr"); if (lafp != NULL) { info.rti_info[RTAX_IFA] = (struct sockaddr *)sdl; lafp->af_status(s, &info); } } #endif if (allfamilies) af_other_status(s); else if (afp->af_other_status != NULL) afp->af_other_status(s); strlcpy(ifs.ifs_name, IfName, sizeof(ifs.ifs_name)); if (ioctl(s, SIOCGIFSTATUS, &ifs) == 0) printf("%s", ifs.ascii); close(s); } static void tunnel_status(int s) { af_all_tunnel_status(s); } void Perror(const char *cmd) { switch (errno) { case ENXIO: errx(1, "%s: no such interface", cmd); break; case EPERM: errx(1, "%s: permission denied", cmd); break; default: err(1, "%s", cmd); } } /* * Print a value a la the %pb%i format of the kernel's kprintf() */ void printb(const char *s, unsigned v, const char *bits) { int i, any = 0; char c; if (bits && *bits == 8) printf("%s=%o", s, v); else printf("%s=%x", s, v); bits++; if (bits) { putchar('<'); while ((i = *bits++) != '\0') { if (v & (1 << (i-1))) { if (any) putchar(','); any = 1; for (; (c = *bits) > 32; bits++) putchar(c); } else { for (; *bits > 32; bits++) ; } } putchar('>'); } } void ifmaybeload(const char *name) { #define MOD_PREFIX "if_" struct module_stat mstat; int fileid, modid; char ifkind[IFNAMSIZ + sizeof(MOD_PREFIX) - 1], ifname[IFNAMSIZ], *dp; const char *cp; /* loading suppressed by the user */ if (noload) return; /* trim the interface number off the end */ strlcpy(ifname, name, sizeof(ifname)); for (dp = ifname; *dp != 0; dp++) { if (isdigit(*dp)) { *dp = 0; break; } } /* turn interface and unit into module name */ snprintf(ifkind, sizeof(ifkind), "%s%s", MOD_PREFIX, ifname); /* scan files in kernel */ mstat.version = sizeof(struct module_stat); for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) { /* scan modules in file */ for (modid = kldfirstmod(fileid); modid > 0; modid = modfnext(modid)) { if (modstat(modid, &mstat) < 0) continue; /* strip bus name if present */ if ((cp = strchr(mstat.name, '/')) != NULL) { cp++; } else { cp = mstat.name; } /* already loaded? */ if (strcmp(ifname, cp) == 0 || strcmp(ifkind, cp) == 0) return; } } /* not present, we should try to load it */ kldload(ifkind); } static struct cmd basic_cmds[] = { DEF_CMD("up", IFF_UP, setifflags), DEF_CMD("down", -IFF_UP, setifflags), DEF_CMD("arp", -IFF_NOARP, setifflags), DEF_CMD("-arp", IFF_NOARP, setifflags), DEF_CMD("debug", IFF_DEBUG, setifflags), DEF_CMD("-debug", -IFF_DEBUG, setifflags), DEF_CMD_ARG("description", setifdescr), DEF_CMD_ARG("descr", setifdescr), DEF_CMD("-description", 0, unsetifdescr), DEF_CMD("-descr", 0, unsetifdescr), DEF_CMD("promisc", IFF_PPROMISC, setifflags), DEF_CMD("-promisc", -IFF_PPROMISC, setifflags), DEF_CMD("add", IFF_UP, notealias), DEF_CMD("alias", IFF_UP, notealias), DEF_CMD("-alias", -IFF_UP, notealias), DEF_CMD("delete", -IFF_UP, notealias), DEF_CMD("remove", -IFF_UP, notealias), #ifdef notdef #define EN_SWABIPS 0x1000 DEF_CMD("swabips", EN_SWABIPS, setifflags), DEF_CMD("-swabips", -EN_SWABIPS, setifflags), #endif DEF_CMD_ARG("netmask", setifnetmask), DEF_CMD_ARG("metric", setifmetric), DEF_CMD_ARG("broadcast", setifbroadaddr), DEF_CMD_ARG2("tunnel", settunnel), DEF_CMD("-tunnel", 0, deletetunnel), DEF_CMD("deletetunnel", 0, deletetunnel), DEF_CMD("link0", IFF_LINK0, setifflags), DEF_CMD("-link0", -IFF_LINK0, setifflags), DEF_CMD("link1", IFF_LINK1, setifflags), DEF_CMD("-link1", -IFF_LINK1, setifflags), DEF_CMD("link2", IFF_LINK2, setifflags), DEF_CMD("-link2", -IFF_LINK2, setifflags), DEF_CMD("monitor", IFF_MONITOR, setifflags), DEF_CMD("-monitor", -IFF_MONITOR, setifflags), DEF_CMD("staticarp", IFF_STATICARP, setifflags), DEF_CMD("-staticarp", -IFF_STATICARP, setifflags), DEF_CMD("polling", IFF_NPOLLING, setifflags), DEF_CMD("-polling", -IFF_NPOLLING, setifflags), DEF_CMD("npolling", IFF_NPOLLING, setifflags), DEF_CMD("-npolling", -IFF_NPOLLING, setifflags), DEF_CMD("rxcsum", IFCAP_RXCSUM, setifcap), DEF_CMD("-rxcsum", -IFCAP_RXCSUM, setifcap), DEF_CMD("txcsum", IFCAP_TXCSUM, setifcap), DEF_CMD("-txcsum", -IFCAP_TXCSUM, setifcap), DEF_CMD("netcons", IFCAP_NETCONS, setifcap), DEF_CMD("-netcons", -IFCAP_NETCONS, setifcap), DEF_CMD("rss", IFCAP_RSS, setifcap), DEF_CMD("-rss", -IFCAP_RSS, setifcap), DEF_CMD("tso", IFCAP_TSO, setifcap), DEF_CMD("-tso", -IFCAP_TSO, setifcap), DEF_CMD("normal", -IFF_LINK0, setifflags), DEF_CMD("compress", IFF_LINK0, setifflags), DEF_CMD("noicmp", IFF_LINK1, setifflags), DEF_CMD_ARG("mtu", setifmtu), DEF_CMD_ARG("name", setifname), DEF_CMD_ARG("pollcpu", setifpollcpu), DEF_CMD_ARG("tsolen", setiftsolen) }; __constructor(101) static void ifconfig_ctor(void) { size_t i; for (i = 0; i < nitems(basic_cmds); i++) cmd_register(&basic_cmds[i]); }