af_inet.c revision 222527
1184802Sjkoshy/* 2184802Sjkoshy * Copyright (c) 1983, 1993 3184802Sjkoshy * The Regents of the University of California. All rights reserved. 4184802Sjkoshy * 5184802Sjkoshy * Redistribution and use in source and binary forms, with or without 6184802Sjkoshy * modification, are permitted provided that the following conditions 7184802Sjkoshy * are met: 8184802Sjkoshy * 1. Redistributions of source code must retain the above copyright 9184802Sjkoshy * notice, this list of conditions and the following disclaimer. 10184802Sjkoshy * 2. Redistributions in binary form must reproduce the above copyright 11184802Sjkoshy * notice, this list of conditions and the following disclaimer in the 12184802Sjkoshy * documentation and/or other materials provided with the distribution. 13184802Sjkoshy * 4. Neither the name of the University nor the names of its contributors 14184802Sjkoshy * may be used to endorse or promote products derived from this software 15184802Sjkoshy * without specific prior written permission. 16184802Sjkoshy * 17184802Sjkoshy * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18184802Sjkoshy * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19184802Sjkoshy * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20184802Sjkoshy * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21184802Sjkoshy * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22184802Sjkoshy * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23184802Sjkoshy * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24184802Sjkoshy * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25184802Sjkoshy * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26184802Sjkoshy * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27184802Sjkoshy * SUCH DAMAGE. 28184802Sjkoshy */ 29184802Sjkoshy 30184802Sjkoshy#ifndef lint 31184802Sjkoshystatic const char rcsid[] = 32184802Sjkoshy "$FreeBSD: head/sbin/ifconfig/af_inet.c 222527 2011-05-31 14:40:21Z bz $"; 33184802Sjkoshy#endif /* not lint */ 34184802Sjkoshy 35184802Sjkoshy#include <sys/types.h> 36184802Sjkoshy#include <sys/ioctl.h> 37184802Sjkoshy#include <sys/socket.h> 38184802Sjkoshy#include <net/if.h> 39184802Sjkoshy 40185341Sjkim#include <ctype.h> 41184802Sjkoshy#include <err.h> 42184802Sjkoshy#include <stdio.h> 43184802Sjkoshy#include <stdlib.h> 44184802Sjkoshy#include <string.h> 45184802Sjkoshy#include <unistd.h> 46184802Sjkoshy#include <ifaddrs.h> 47184802Sjkoshy 48184802Sjkoshy#include <netinet/in.h> 49283884Sjhb#include <net/if_var.h> /* for struct ifaddr */ 50184802Sjkoshy#include <netinet/in_var.h> 51184802Sjkoshy#include <arpa/inet.h> 52184802Sjkoshy#include <netdb.h> 53184802Sjkoshy 54184802Sjkoshy#include "ifconfig.h" 55184802Sjkoshy 56283884Sjhbstatic struct in_aliasreq in_addreq; 57184802Sjkoshystatic struct ifreq in_ridreq; 58184802Sjkoshy 59184802Sjkoshystatic void 60184802Sjkoshyin_status(int s __unused, const struct ifaddrs *ifa) 61184802Sjkoshy{ 62184802Sjkoshy struct sockaddr_in *sin, null_sin; 63184802Sjkoshy 64184802Sjkoshy memset(&null_sin, 0, sizeof(null_sin)); 65184802Sjkoshy 66184802Sjkoshy sin = (struct sockaddr_in *)ifa->ifa_addr; 67283884Sjhb if (sin == NULL) 68184802Sjkoshy return; 69184802Sjkoshy 70184802Sjkoshy printf("\tinet %s ", inet_ntoa(sin->sin_addr)); 71249069Ssbruno 72184802Sjkoshy if (ifa->ifa_flags & IFF_POINTOPOINT) { 73184802Sjkoshy sin = (struct sockaddr_in *)ifa->ifa_dstaddr; 74184802Sjkoshy if (sin == NULL) 75184802Sjkoshy sin = &null_sin; 76184802Sjkoshy printf("--> %s ", inet_ntoa(sin->sin_addr)); 77184802Sjkoshy } 78184802Sjkoshy 79184802Sjkoshy sin = (struct sockaddr_in *)ifa->ifa_netmask; 80184802Sjkoshy if (sin == NULL) 81306824Sjulian sin = &null_sin; 82184802Sjkoshy printf("netmask 0x%lx ", (unsigned long)ntohl(sin->sin_addr.s_addr)); 83185341Sjkim 84184802Sjkoshy if (ifa->ifa_flags & IFF_BROADCAST) { 85184802Sjkoshy sin = (struct sockaddr_in *)ifa->ifa_broadaddr; 86283884Sjhb if (sin != NULL && sin->sin_addr.s_addr != 0) 87184802Sjkoshy printf("broadcast %s", inet_ntoa(sin->sin_addr)); 88184802Sjkoshy } 89184802Sjkoshy putchar('\n'); 90250097Sdavide} 91306824Sjulian 92185363Sjkoshy#define SIN(x) ((struct sockaddr_in *) &(x)) 93306824Sjulianstatic struct sockaddr_in *sintab[] = { 94185363Sjkoshy SIN(in_ridreq.ifr_addr), SIN(in_addreq.ifra_addr), 95184802Sjkoshy SIN(in_addreq.ifra_mask), SIN(in_addreq.ifra_broadaddr) 96184802Sjkoshy}; 97184802Sjkoshy 98184802Sjkoshystatic void 99184802Sjkoshyin_getaddr(const char *s, int which) 100185363Sjkoshy{ 101184802Sjkoshy#define MIN(a,b) ((a)<(b)?(a):(b)) 102185363Sjkoshy struct sockaddr_in *sin = sintab[which]; 103185363Sjkoshy struct hostent *hp; 104184802Sjkoshy struct netent *np; 105184802Sjkoshy 106184802Sjkoshy sin->sin_len = sizeof(*sin); 107184802Sjkoshy if (which != MASK) 108184802Sjkoshy sin->sin_family = AF_INET; 109184802Sjkoshy 110185363Sjkoshy if (which == ADDR) { 111184802Sjkoshy char *p = NULL; 112184802Sjkoshy 113184802Sjkoshy if((p = strrchr(s, '/')) != NULL) { 114184802Sjkoshy const char *errstr; 115184802Sjkoshy /* address is `name/masklen' */ 116184802Sjkoshy int masklen; 117184802Sjkoshy struct sockaddr_in *min = sintab[MASK]; 118184802Sjkoshy *p = '\0'; 119185363Sjkoshy if (!isdigit(*(p + 1))) 120185363Sjkoshy errstr = "invalid"; 121185363Sjkoshy else 122185363Sjkoshy masklen = (int)strtonum(p + 1, 0, 32, &errstr); 123185363Sjkoshy if (errstr != NULL) { 124306824Sjulian *p = '/'; 125306824Sjulian errx(1, "%s: bad value (width %s)", s, errstr); 126306824Sjulian } 127306824Sjulian min->sin_len = sizeof(*min); 128306824Sjulian min->sin_addr.s_addr = htonl(~((1LL << (32 - masklen)) - 1) & 129306824Sjulian 0xffffffff); 130306824Sjulian } 131306824Sjulian } 132185363Sjkoshy 133185363Sjkoshy if (inet_aton(s, &sin->sin_addr)) 134185363Sjkoshy return; 135185363Sjkoshy if ((hp = gethostbyname(s)) != 0) 136185363Sjkoshy bcopy(hp->h_addr, (char *)&sin->sin_addr, 137185363Sjkoshy MIN((size_t)hp->h_length, sizeof(sin->sin_addr))); 138185363Sjkoshy else if ((np = getnetbyname(s)) != 0) 139185363Sjkoshy sin->sin_addr = inet_makeaddr(np->n_net, INADDR_ANY); 140185363Sjkoshy else 141187761Sjeff errx(1, "%s: bad value", s); 142249069Ssbruno#undef MIN 143249069Ssbruno} 144249069Ssbruno 145249069Ssbrunostatic void 146249069Ssbrunoin_status_tunnel(int s) 147249069Ssbruno{ 148249069Ssbruno char src[NI_MAXHOST]; 149249069Ssbruno char dst[NI_MAXHOST]; 150187761Sjeff struct ifreq ifr; 151206089Sfabient const struct sockaddr *sa = (const struct sockaddr *) &ifr.ifr_addr; 152187761Sjeff 153267602Skib memset(&ifr, 0, sizeof(ifr)); 154267602Skib strncpy(ifr.ifr_name, name, IFNAMSIZ); 155267602Skib 156267602Skib if (ioctl(s, SIOCGIFPSRCADDR, (caddr_t)&ifr) < 0) 157206089Sfabient return; 158206089Sfabient if (sa->sa_family != AF_INET) 159206089Sfabient return; 160206089Sfabient if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0, NI_NUMERICHOST) != 0) 161206089Sfabient src[0] = '\0'; 162267602Skib 163267602Skib if (ioctl(s, SIOCGIFPDSTADDR, (caddr_t)&ifr) < 0) 164267602Skib return; 165267602Skib if (sa->sa_family != AF_INET) 166232366Sdavide return; 167232366Sdavide if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0, NI_NUMERICHOST) != 0) 168232366Sdavide dst[0] = '\0'; 169232366Sdavide 170241738Ssbruno printf("\ttunnel inet %s --> %s\n", src, dst); 171241738Ssbruno} 172241738Ssbruno 173241738Ssbrunostatic void 174240164Sfabientin_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres) 175240164Sfabient{ 176240164Sfabient struct in_aliasreq addreq; 177240164Sfabient 178246166Ssbruno memset(&addreq, 0, sizeof(addreq)); 179246166Ssbruno strncpy(addreq.ifra_name, name, IFNAMSIZ); 180246166Ssbruno memcpy(&addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len); 181246166Ssbruno memcpy(&addreq.ifra_dstaddr, dstres->ai_addr, dstres->ai_addr->sa_len); 182320113Savg 183320113Savg if (ioctl(s, SIOCSIFPHYADDR, &addreq) < 0) 184320113Savg warn("SIOCSIFPHYADDR"); 185320113Savg} 186320113Savg 187320100Savgstatic struct afswtch af_inet = { 188320113Savg .af_name = "inet", 189320100Savg .af_af = AF_INET, 190320100Savg .af_status = in_status, 191320100Savg .af_getaddr = in_getaddr, 192320113Savg .af_status_tunnel = in_status_tunnel, 193320113Savg .af_settunnel = in_set_tunnel, 194320113Savg .af_difaddr = SIOCDIFADDR, 195320113Savg .af_aifaddr = SIOCAIFADDR, 196320113Savg .af_ridreq = &in_ridreq, 197280455Srrs .af_addreq = &in_addreq, 198280455Srrs}; 199280455Srrs 200280455Srrsstatic __constructor void 201280455Srrsinet_ctor(void) 202280455Srrs{ 203248842Ssbruno if (!feature_present("inet")) 204280455Srrs return; 205248842Ssbruno af_register(&af_inet); 206248842Ssbruno} 207248842Ssbruno