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 * 3. 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 * $FreeBSD: src/sbin/ifconfig/af_inet.c,v 1.2 2005/06/16 19:37:09 ume Exp $ 30 */ 31 32 #include <sys/types.h> 33 #include <sys/ioctl.h> 34 #include <sys/socket.h> 35 #include <net/if.h> 36 #include <net/route.h> /* for RTX_IFA */ 37 38 #include <err.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <unistd.h> 43 44 #include <netinet/in.h> 45 #include <net/if_var.h> /* for struct ifaddr */ 46 #include <netinet/in_var.h> 47 #include <arpa/inet.h> 48 #include <netdb.h> 49 50 #include "ifconfig.h" 51 52 static struct ifaliasreq in_addreq; 53 static struct ifreq in_ridreq; 54 55 static void 56 in_status(int s __unused, const struct rt_addrinfo * info) 57 { 58 struct sockaddr_in *sin, null_sin; 59 60 memset(&null_sin, 0, sizeof(null_sin)); 61 62 sin = (struct sockaddr_in *)info->rti_info[RTAX_IFA]; 63 if (sin == NULL) 64 return; 65 66 printf("\tinet %s ", inet_ntoa(sin->sin_addr)); 67 68 if (flags & IFF_POINTOPOINT) { 69 /* note RTAX_BRD overlap with IFF_BROADCAST */ 70 sin = (struct sockaddr_in *)info->rti_info[RTAX_BRD]; 71 if (!sin) 72 sin = &null_sin; 73 printf("--> %s ", inet_ntoa(sin->sin_addr)); 74 } 75 76 sin = (struct sockaddr_in *)info->rti_info[RTAX_NETMASK]; 77 if (!sin) 78 sin = &null_sin; 79 printf("netmask 0x%lx ", (unsigned long)ntohl(sin->sin_addr.s_addr)); 80 81 if (flags & IFF_BROADCAST) { 82 /* note RTAX_BRD overlap with IFF_POINTOPOINT */ 83 sin = (struct sockaddr_in *)info->rti_info[RTAX_BRD]; 84 if (sin && sin->sin_addr.s_addr != 0) 85 printf("broadcast %s", inet_ntoa(sin->sin_addr)); 86 } 87 putchar('\n'); 88 } 89 90 #define SIN(x) ((struct sockaddr_in *) &(x)) 91 static struct sockaddr_in *sintab[] = { 92 SIN(in_ridreq.ifr_addr), SIN(in_addreq.ifra_addr), 93 SIN(in_addreq.ifra_mask), SIN(in_addreq.ifra_broadaddr) 94 }; 95 96 static void 97 in_getaddr(const char *s, int which) 98 { 99 struct sockaddr_in *sin = sintab[which]; 100 struct hostent *hp; 101 struct netent *np; 102 103 sin->sin_len = sizeof(*sin); 104 if (which != MASK) 105 sin->sin_family = AF_INET; 106 107 if (which == ADDR) { 108 char *p = NULL; 109 110 if((p = strrchr(s, '/')) != NULL) { 111 /* address is `name/masklen' */ 112 int masklen; 113 int ret; 114 struct sockaddr_in *min = sintab[MASK]; 115 *p = '\0'; 116 ret = sscanf(p+1, "%u", &masklen); 117 if(ret != 1 || (masklen < 0 || masklen > 32)) { 118 *p = '/'; 119 errx(1, "%s: bad value", s); 120 } 121 min->sin_len = sizeof(*min); 122 min->sin_addr.s_addr = htonl(~((1LL << (32 - masklen)) - 1) & 123 0xffffffff); 124 } 125 } 126 127 if (inet_aton(s, &sin->sin_addr)) 128 return; 129 if ((hp = gethostbyname(s)) != NULL) 130 bcopy(hp->h_addr, (char *)&sin->sin_addr, 131 MIN(hp->h_length, sizeof(sin->sin_addr))); 132 else if ((np = getnetbyname(s)) != NULL) 133 sin->sin_addr = inet_makeaddr(np->n_net, INADDR_ANY); 134 else 135 errx(1, "%s: bad value", s); 136 } 137 138 static void 139 in_status_tunnel(int s) 140 { 141 char src[NI_MAXHOST]; 142 char dst[NI_MAXHOST]; 143 struct ifreq ifr; 144 const struct sockaddr *sa = (const struct sockaddr *) &ifr.ifr_addr; 145 146 memset(&ifr, 0, sizeof(ifr)); 147 strncpy(ifr.ifr_name, name, IFNAMSIZ); 148 149 if (ioctl(s, SIOCGIFPSRCADDR, (caddr_t)&ifr) < 0) 150 return; 151 if (sa->sa_family != AF_INET) 152 return; 153 if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0, NI_NUMERICHOST) != 0) 154 src[0] = '\0'; 155 156 if (ioctl(s, SIOCGIFPDSTADDR, (caddr_t)&ifr) < 0) 157 return; 158 if (sa->sa_family != AF_INET) 159 return; 160 if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0, NI_NUMERICHOST) != 0) 161 dst[0] = '\0'; 162 163 printf("\ttunnel inet %s --> %s\n", src, dst); 164 } 165 166 static void 167 in_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres) 168 { 169 struct ifaliasreq addreq; 170 171 memset(&addreq, 0, sizeof(addreq)); 172 strncpy(addreq.ifra_name, name, IFNAMSIZ); 173 memcpy(&addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len); 174 memcpy(&addreq.ifra_dstaddr, dstres->ai_addr, dstres->ai_addr->sa_len); 175 176 if (ioctl(s, SIOCSIFPHYADDR, &addreq) < 0) 177 warn("SIOCSIFPHYADDR"); 178 } 179 180 static struct afswtch af_inet = { 181 .af_name = "inet", 182 .af_af = AF_INET, 183 .af_status = in_status, 184 .af_getaddr = in_getaddr, 185 .af_status_tunnel = in_status_tunnel, 186 .af_settunnel = in_set_tunnel, 187 .af_difaddr = SIOCDIFADDR, 188 .af_aifaddr = SIOCAIFADDR, 189 .af_ridreq = &in_ridreq, 190 .af_addreq = &in_addreq, 191 }; 192 193 static __constructor(101) void 194 inet_ctor(void) 195 { 196 af_register(&af_inet); 197 } 198