af_inet.c revision 194799
1138593Ssam/* 2138593Ssam * Copyright (c) 1983, 1993 3138593Ssam * The Regents of the University of California. All rights reserved. 4138593Ssam * 5138593Ssam * Redistribution and use in source and binary forms, with or without 6138593Ssam * modification, are permitted provided that the following conditions 7138593Ssam * are met: 8138593Ssam * 1. Redistributions of source code must retain the above copyright 9138593Ssam * notice, this list of conditions and the following disclaimer. 10138593Ssam * 2. Redistributions in binary form must reproduce the above copyright 11138593Ssam * notice, this list of conditions and the following disclaimer in the 12138593Ssam * documentation and/or other materials provided with the distribution. 13138593Ssam * 4. Neither the name of the University nor the names of its contributors 14138593Ssam * may be used to endorse or promote products derived from this software 15138593Ssam * without specific prior written permission. 16138593Ssam * 17138593Ssam * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18138593Ssam * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19138593Ssam * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20138593Ssam * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21138593Ssam * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22138593Ssam * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23138593Ssam * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24138593Ssam * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25138593Ssam * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26138593Ssam * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27138593Ssam * SUCH DAMAGE. 28138593Ssam */ 29138593Ssam 30138593Ssam#ifndef lint 31138593Ssamstatic const char rcsid[] = 32138593Ssam "$FreeBSD: head/sbin/ifconfig/af_inet.c 194799 2009-06-23 23:49:52Z delphij $"; 33138593Ssam#endif /* not lint */ 34138593Ssam 35138593Ssam#include <sys/types.h> 36138593Ssam#include <sys/ioctl.h> 37138593Ssam#include <sys/socket.h> 38138593Ssam#include <net/if.h> 39138593Ssam 40138593Ssam#include <err.h> 41138593Ssam#include <stdio.h> 42138593Ssam#include <stdlib.h> 43138593Ssam#include <string.h> 44138593Ssam#include <unistd.h> 45166956Ssam#include <ifaddrs.h> 46138593Ssam 47138593Ssam#include <netinet/in.h> 48138593Ssam#include <net/if_var.h> /* for struct ifaddr */ 49138593Ssam#include <netinet/in_var.h> 50138593Ssam#include <arpa/inet.h> 51138593Ssam#include <netdb.h> 52138593Ssam 53138593Ssam#include "ifconfig.h" 54138593Ssam 55191121Sbrooksstatic struct in_aliasreq in_addreq; 56138593Ssamstatic struct ifreq in_ridreq; 57138593Ssam 58138593Ssamstatic void 59166956Ssamin_status(int s __unused, const struct ifaddrs *ifa) 60138593Ssam{ 61138593Ssam struct sockaddr_in *sin, null_sin; 62138593Ssam 63138593Ssam memset(&null_sin, 0, sizeof(null_sin)); 64138593Ssam 65166956Ssam sin = (struct sockaddr_in *)ifa->ifa_addr; 66138593Ssam if (sin == NULL) 67138593Ssam return; 68138593Ssam 69138593Ssam printf("\tinet %s ", inet_ntoa(sin->sin_addr)); 70138593Ssam 71166956Ssam if (ifa->ifa_flags & IFF_POINTOPOINT) { 72166956Ssam sin = (struct sockaddr_in *)ifa->ifa_dstaddr; 73166956Ssam if (sin == NULL) 74138593Ssam sin = &null_sin; 75138593Ssam printf("--> %s ", inet_ntoa(sin->sin_addr)); 76138593Ssam } 77138593Ssam 78166956Ssam sin = (struct sockaddr_in *)ifa->ifa_netmask; 79166956Ssam if (sin == NULL) 80138593Ssam sin = &null_sin; 81138593Ssam printf("netmask 0x%lx ", (unsigned long)ntohl(sin->sin_addr.s_addr)); 82138593Ssam 83166956Ssam if (ifa->ifa_flags & IFF_BROADCAST) { 84166956Ssam sin = (struct sockaddr_in *)ifa->ifa_broadaddr; 85166956Ssam if (sin != NULL && sin->sin_addr.s_addr != 0) 86138593Ssam printf("broadcast %s", inet_ntoa(sin->sin_addr)); 87138593Ssam } 88138593Ssam putchar('\n'); 89138593Ssam} 90138593Ssam 91138593Ssam#define SIN(x) ((struct sockaddr_in *) &(x)) 92138593Ssamstatic struct sockaddr_in *sintab[] = { 93138593Ssam SIN(in_ridreq.ifr_addr), SIN(in_addreq.ifra_addr), 94138593Ssam SIN(in_addreq.ifra_mask), SIN(in_addreq.ifra_broadaddr) 95138593Ssam}; 96138593Ssam 97138593Ssamstatic void 98138593Ssamin_getaddr(const char *s, int which) 99138593Ssam{ 100138593Ssam#define MIN(a,b) ((a)<(b)?(a):(b)) 101138593Ssam struct sockaddr_in *sin = sintab[which]; 102138593Ssam struct hostent *hp; 103138593Ssam struct netent *np; 104138593Ssam 105138593Ssam sin->sin_len = sizeof(*sin); 106138593Ssam if (which != MASK) 107138593Ssam sin->sin_family = AF_INET; 108138593Ssam 109138593Ssam if (which == ADDR) { 110138593Ssam char *p = NULL; 111138593Ssam 112138593Ssam if((p = strrchr(s, '/')) != NULL) { 113138593Ssam /* address is `name/masklen' */ 114138593Ssam int masklen; 115138593Ssam int ret; 116138593Ssam struct sockaddr_in *min = sintab[MASK]; 117138593Ssam *p = '\0'; 118138593Ssam ret = sscanf(p+1, "%u", &masklen); 119138593Ssam if(ret != 1 || (masklen < 0 || masklen > 32)) { 120138593Ssam *p = '/'; 121138593Ssam errx(1, "%s: bad value", s); 122138593Ssam } 123138593Ssam min->sin_len = sizeof(*min); 124138593Ssam min->sin_addr.s_addr = htonl(~((1LL << (32 - masklen)) - 1) & 125138593Ssam 0xffffffff); 126138593Ssam } 127138593Ssam } 128138593Ssam 129138593Ssam if (inet_aton(s, &sin->sin_addr)) 130138593Ssam return; 131138593Ssam if ((hp = gethostbyname(s)) != 0) 132138593Ssam bcopy(hp->h_addr, (char *)&sin->sin_addr, 133194799Sdelphij MIN((size_t)hp->h_length, sizeof(sin->sin_addr))); 134138593Ssam else if ((np = getnetbyname(s)) != 0) 135138593Ssam sin->sin_addr = inet_makeaddr(np->n_net, INADDR_ANY); 136138593Ssam else 137138593Ssam errx(1, "%s: bad value", s); 138138593Ssam#undef MIN 139138593Ssam} 140138593Ssam 141138593Ssamstatic void 142138593Ssamin_status_tunnel(int s) 143138593Ssam{ 144138593Ssam char src[NI_MAXHOST]; 145138593Ssam char dst[NI_MAXHOST]; 146138593Ssam struct ifreq ifr; 147138593Ssam const struct sockaddr *sa = (const struct sockaddr *) &ifr.ifr_addr; 148138593Ssam 149138593Ssam memset(&ifr, 0, sizeof(ifr)); 150138593Ssam strncpy(ifr.ifr_name, name, IFNAMSIZ); 151138593Ssam 152138593Ssam if (ioctl(s, SIOCGIFPSRCADDR, (caddr_t)&ifr) < 0) 153138593Ssam return; 154147437Sume if (sa->sa_family != AF_INET) 155147437Sume return; 156138593Ssam if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0, NI_NUMERICHOST) != 0) 157138593Ssam src[0] = '\0'; 158138593Ssam 159138593Ssam if (ioctl(s, SIOCGIFPDSTADDR, (caddr_t)&ifr) < 0) 160138593Ssam return; 161147437Sume if (sa->sa_family != AF_INET) 162147437Sume return; 163138593Ssam if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0, NI_NUMERICHOST) != 0) 164138593Ssam dst[0] = '\0'; 165138593Ssam 166138593Ssam printf("\ttunnel inet %s --> %s\n", src, dst); 167138593Ssam} 168138593Ssam 169138593Ssamstatic void 170138593Ssamin_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres) 171138593Ssam{ 172191121Sbrooks struct in_aliasreq addreq; 173138593Ssam 174138593Ssam memset(&addreq, 0, sizeof(addreq)); 175138593Ssam strncpy(addreq.ifra_name, name, IFNAMSIZ); 176138593Ssam memcpy(&addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len); 177138593Ssam memcpy(&addreq.ifra_dstaddr, dstres->ai_addr, dstres->ai_addr->sa_len); 178138593Ssam 179138593Ssam if (ioctl(s, SIOCSIFPHYADDR, &addreq) < 0) 180138593Ssam warn("SIOCSIFPHYADDR"); 181138593Ssam} 182138593Ssam 183138593Ssamstatic struct afswtch af_inet = { 184138593Ssam .af_name = "inet", 185138593Ssam .af_af = AF_INET, 186138593Ssam .af_status = in_status, 187138593Ssam .af_getaddr = in_getaddr, 188138593Ssam .af_status_tunnel = in_status_tunnel, 189138593Ssam .af_settunnel = in_set_tunnel, 190138593Ssam .af_difaddr = SIOCDIFADDR, 191138593Ssam .af_aifaddr = SIOCAIFADDR, 192138593Ssam .af_ridreq = &in_ridreq, 193138593Ssam .af_addreq = &in_addreq, 194138593Ssam}; 195138593Ssam 196138593Ssamstatic __constructor void 197138593Ssaminet_ctor(void) 198138593Ssam{ 199138593Ssam af_register(&af_inet); 200138593Ssam} 201