/* * 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/af_inet.c,v 1.2 2005/06/16 19:37:09 ume Exp $ */ #include #include #include #include #include #include /* for struct ifaddr */ #include #include #include #include #include #include #include #include #include #include #include "ifconfig.h" static struct ifaliasreq in_addreq; static struct ifreq in_ridreq; static char addr_buf[NI_MAXHOST]; /* for getnameinfo() */ static void in_status(int s __unused, const struct ifaddrs *ifa) { struct sockaddr_in *sin, null_sin; int error, n_flags; memset(&null_sin, 0, sizeof(null_sin)); sin = (struct sockaddr_in *)ifa->ifa_addr; if (sin == NULL) return; if (f_addr != NULL && strcmp(f_addr, "fqdn") == 0) n_flags = 0; else if (f_addr != NULL && strcmp(f_addr, "host") == 0) n_flags = NI_NOFQDN; else n_flags = NI_NUMERICHOST; error = getnameinfo((struct sockaddr *)sin, sin->sin_len, addr_buf, sizeof(addr_buf), NULL, 0, n_flags); if (error != 0) inet_ntop(AF_INET, &sin->sin_addr, addr_buf, sizeof(addr_buf)); printf("\tinet %s", addr_buf); if (ifa->ifa_flags & IFF_POINTOPOINT) { sin = (struct sockaddr_in *)ifa->ifa_dstaddr; if (sin == NULL) sin = &null_sin; printf(" --> %s", inet_ntoa(sin->sin_addr)); } sin = (struct sockaddr_in *)ifa->ifa_netmask; if (sin == NULL) sin = &null_sin; if (f_inet != NULL && strcmp(f_inet, "cidr") == 0) { int cidr = 32; unsigned long smask = ntohl(sin->sin_addr.s_addr); while ((smask & 1) == 0) { smask >>= 1; cidr--; if (cidr == 0) break; } printf("/%d", cidr); } else if (f_inet != NULL && strcmp(f_inet, "dotted") == 0) { printf(" netmask %s", inet_ntoa(sin->sin_addr)); } else { printf(" netmask 0x%lx", (unsigned long)ntohl(sin->sin_addr.s_addr)); } if (ifa->ifa_flags & IFF_BROADCAST) { sin = (struct sockaddr_in *)ifa->ifa_broadaddr; if (sin != NULL && sin->sin_addr.s_addr != 0) printf(" broadcast %s", inet_ntoa(sin->sin_addr)); } putchar('\n'); } #define SIN(x) ((struct sockaddr_in *) &(x)) static struct sockaddr_in *sintab[] = { SIN(in_ridreq.ifr_addr), SIN(in_addreq.ifra_addr), SIN(in_addreq.ifra_mask), SIN(in_addreq.ifra_broadaddr) }; static void in_getaddr(const char *s, int which) { struct sockaddr_in *sin = sintab[which]; struct hostent *hp; struct netent *np; sin->sin_len = sizeof(*sin); if (which != MASK) sin->sin_family = AF_INET; if (which == ADDR) { char *p = NULL; if ((p = strrchr(s, '/')) != NULL) { /* address is `name/masklen' */ int masklen, ret; struct sockaddr_in *min = sintab[MASK]; *p = '\0'; ret = sscanf(p+1, "%u", &masklen); if (ret != 1 || (masklen < 0 || masklen > 32)) { *p = '/'; errx(1, "%s: bad value", s); } min->sin_len = sizeof(*min); min->sin_addr.s_addr = htonl(rounddown2(0xffffffff, 1LL << (32 - masklen))); } } if (inet_aton(s, &sin->sin_addr)) return; if ((hp = gethostbyname(s)) != NULL) memcpy(&sin->sin_addr, hp->h_addr, MIN((size_t)hp->h_length, sizeof(sin->sin_addr))); else if ((np = getnetbyname(s)) != NULL) sin->sin_addr = inet_makeaddr(np->n_net, INADDR_ANY); else errx(1, "%s: bad value", s); } static void in_status_tunnel(int s) { char src[NI_MAXHOST]; char dst[NI_MAXHOST]; struct ifreq ifr; const struct sockaddr *sa = (const struct sockaddr *) &ifr.ifr_addr; memset(&ifr, 0, sizeof(ifr)); strlcpy(ifr.ifr_name, IfName, sizeof(ifr.ifr_name)); if (ioctl(s, SIOCGIFPSRCADDR, &ifr) < 0) return; if (sa->sa_family != AF_INET) return; if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0, NI_NUMERICHOST) != 0) src[0] = '\0'; if (ioctl(s, SIOCGIFPDSTADDR, &ifr) < 0) return; if (sa->sa_family != AF_INET) return; if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0, NI_NUMERICHOST) != 0) dst[0] = '\0'; printf("\ttunnel inet %s --> %s\n", src, dst); } static void in_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres) { struct ifaliasreq addreq; memset(&addreq, 0, sizeof(addreq)); strlcpy(addreq.ifra_name, IfName, sizeof(addreq.ifra_name)); memcpy(&addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len); memcpy(&addreq.ifra_dstaddr, dstres->ai_addr, dstres->ai_addr->sa_len); if (ioctl(s, SIOCSIFPHYADDR, &addreq) < 0) warn("SIOCSIFPHYADDR"); } static struct afswtch af_inet = { .af_name = "inet", .af_af = AF_INET, .af_status = in_status, .af_getaddr = in_getaddr, .af_status_tunnel = in_status_tunnel, .af_settunnel = in_set_tunnel, .af_difaddr = SIOCDIFADDR, .af_aifaddr = SIOCAIFADDR, .af_ridreq = &in_ridreq, .af_addreq = &in_addreq, }; __constructor(112) static void inet_ctor(void) { af_register(&af_inet); }