1/* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#ifndef lint 31static const char rcsid[] = 32 "$FreeBSD: releng/11.0/sbin/ifconfig/af_inet.c 301185 2016-06-02 03:16:02Z allanjude $"; 33#endif /* not lint */ 34 35#include <sys/param.h> 36#include <sys/ioctl.h> 37#include <sys/socket.h> 38#include <net/if.h> 39 40#include <ctype.h> 41#include <err.h> 42#include <stdio.h> 43#include <stdlib.h> 44#include <string.h> 45#include <unistd.h> 46#include <ifaddrs.h> 47 48#include <netinet/in.h> 49#include <netinet/in_var.h> 50#include <arpa/inet.h> 51#include <netdb.h> 52 53#include "ifconfig.h" 54 55static struct in_aliasreq in_addreq; 56static struct ifreq in_ridreq; 57static char addr_buf[NI_MAXHOST]; /*for getnameinfo()*/ 58extern char *f_inet, *f_addr; 59 60static void 61in_status(int s __unused, const struct ifaddrs *ifa) 62{ 63 struct sockaddr_in *sin, null_sin; 64 int error, n_flags; 65 66 memset(&null_sin, 0, sizeof(null_sin)); 67 68 sin = (struct sockaddr_in *)ifa->ifa_addr; 69 if (sin == NULL) 70 return; 71 72 if (f_addr != NULL && strcmp(f_addr, "fqdn") == 0) 73 n_flags = 0; 74 else if (f_addr != NULL && strcmp(f_addr, "host") == 0) 75 n_flags = NI_NOFQDN; 76 else 77 n_flags = NI_NUMERICHOST; 78 79 error = getnameinfo((struct sockaddr *)sin, sin->sin_len, addr_buf, 80 sizeof(addr_buf), NULL, 0, n_flags); 81 82 if (error) 83 inet_ntop(AF_INET, &sin->sin_addr, addr_buf, sizeof(addr_buf)); 84 85 printf("\tinet %s", addr_buf); 86 87 if (ifa->ifa_flags & IFF_POINTOPOINT) { 88 sin = (struct sockaddr_in *)ifa->ifa_dstaddr; 89 if (sin == NULL) 90 sin = &null_sin; 91 printf(" --> %s ", inet_ntoa(sin->sin_addr)); 92 } 93 94 sin = (struct sockaddr_in *)ifa->ifa_netmask; 95 if (sin == NULL) 96 sin = &null_sin; 97 if (f_inet != NULL && strcmp(f_inet, "cidr") == 0) { 98 int cidr = 32; 99 unsigned long smask; 100 101 smask = ntohl(sin->sin_addr.s_addr); 102 while ((smask & 1) == 0) { 103 smask = smask >> 1; 104 cidr--; 105 if (cidr == 0) 106 break; 107 } 108 printf("/%d ", cidr); 109 } else if (f_inet != NULL && strcmp(f_inet, "dotted") == 0) 110 printf(" netmask %s ", inet_ntoa(sin->sin_addr)); 111 else 112 printf(" netmask 0x%lx ", (unsigned long)ntohl(sin->sin_addr.s_addr)); 113 114 if (ifa->ifa_flags & IFF_BROADCAST) { 115 sin = (struct sockaddr_in *)ifa->ifa_broadaddr; 116 if (sin != NULL && sin->sin_addr.s_addr != 0) 117 printf("broadcast %s ", inet_ntoa(sin->sin_addr)); 118 } 119 120 print_vhid(ifa, " "); 121 122 putchar('\n'); 123} 124 125#define SIN(x) ((struct sockaddr_in *) &(x)) 126static struct sockaddr_in *sintab[] = { 127 SIN(in_ridreq.ifr_addr), SIN(in_addreq.ifra_addr), 128 SIN(in_addreq.ifra_mask), SIN(in_addreq.ifra_broadaddr) 129}; 130 131static void 132in_getaddr(const char *s, int which) 133{ 134 struct sockaddr_in *sin = sintab[which]; 135 struct hostent *hp; 136 struct netent *np; 137 138 sin->sin_len = sizeof(*sin); 139 sin->sin_family = AF_INET; 140 141 if (which == ADDR) { 142 char *p = NULL; 143 144 if((p = strrchr(s, '/')) != NULL) { 145 const char *errstr; 146 /* address is `name/masklen' */ 147 int masklen; 148 struct sockaddr_in *min = sintab[MASK]; 149 *p = '\0'; 150 if (!isdigit(*(p + 1))) 151 errstr = "invalid"; 152 else 153 masklen = (int)strtonum(p + 1, 0, 32, &errstr); 154 if (errstr != NULL) { 155 *p = '/'; 156 errx(1, "%s: bad value (width %s)", s, errstr); 157 } 158 min->sin_family = AF_INET; 159 min->sin_len = sizeof(*min); 160 min->sin_addr.s_addr = htonl(~((1LL << (32 - masklen)) - 1) & 161 0xffffffff); 162 } 163 } 164 165 if (inet_aton(s, &sin->sin_addr)) 166 return; 167 if ((hp = gethostbyname(s)) != NULL) 168 bcopy(hp->h_addr, (char *)&sin->sin_addr, 169 MIN((size_t)hp->h_length, sizeof(sin->sin_addr))); 170 else if ((np = getnetbyname(s)) != NULL) 171 sin->sin_addr = inet_makeaddr(np->n_net, INADDR_ANY); 172 else 173 errx(1, "%s: bad value", s); 174} 175 176static void 177in_status_tunnel(int s) 178{ 179 char src[NI_MAXHOST]; 180 char dst[NI_MAXHOST]; 181 struct ifreq ifr; 182 const struct sockaddr *sa = (const struct sockaddr *) &ifr.ifr_addr; 183 184 memset(&ifr, 0, sizeof(ifr)); 185 strlcpy(ifr.ifr_name, name, IFNAMSIZ); 186 187 if (ioctl(s, SIOCGIFPSRCADDR, (caddr_t)&ifr) < 0) 188 return; 189 if (sa->sa_family != AF_INET) 190 return; 191 if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0, NI_NUMERICHOST) != 0) 192 src[0] = '\0'; 193 194 if (ioctl(s, SIOCGIFPDSTADDR, (caddr_t)&ifr) < 0) 195 return; 196 if (sa->sa_family != AF_INET) 197 return; 198 if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0, NI_NUMERICHOST) != 0) 199 dst[0] = '\0'; 200 201 printf("\ttunnel inet %s --> %s\n", src, dst); 202} 203 204static void 205in_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres) 206{ 207 struct in_aliasreq addreq; 208 209 memset(&addreq, 0, sizeof(addreq)); 210 strlcpy(addreq.ifra_name, name, IFNAMSIZ); 211 memcpy(&addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len); 212 memcpy(&addreq.ifra_dstaddr, dstres->ai_addr, dstres->ai_addr->sa_len); 213 214 if (ioctl(s, SIOCSIFPHYADDR, &addreq) < 0) 215 warn("SIOCSIFPHYADDR"); 216} 217 218static struct afswtch af_inet = { 219 .af_name = "inet", 220 .af_af = AF_INET, 221 .af_status = in_status, 222 .af_getaddr = in_getaddr, 223 .af_status_tunnel = in_status_tunnel, 224 .af_settunnel = in_set_tunnel, 225 .af_difaddr = SIOCDIFADDR, 226 .af_aifaddr = SIOCAIFADDR, 227 .af_ridreq = &in_ridreq, 228 .af_addreq = &in_addreq, 229}; 230 231static __constructor void 232inet_ctor(void) 233{ 234 235#ifndef RESCUE 236 if (!feature_present("inet")) 237 return; 238#endif 239 af_register(&af_inet); 240} 241