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 * $FreeBSD: src/sbin/ifconfig/af_inet.c,v 1.2 2005/06/16 19:37:09 ume Exp $ 30 * $DragonFly: src/sbin/ifconfig/af_inet.c,v 1.2 2006/06/24 07:51:37 sephe Exp $ 31 */ 32 33 #include <sys/types.h> 34 #include <sys/ioctl.h> 35 #include <sys/socket.h> 36 #include <net/if.h> 37 #include <net/route.h> /* for RTX_IFA */ 38 39 #include <err.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <unistd.h> 44 45 #include <netinet/in.h> 46 #include <net/if_var.h> /* for struct ifaddr */ 47 #include <netinet/in_var.h> 48 #include <arpa/inet.h> 49 #include <netdb.h> 50 51 #include "ifconfig.h" 52 53 static struct ifaliasreq in_addreq; 54 static struct ifreq in_ridreq; 55 56 static void 57 in_status(int s __unused, const struct rt_addrinfo * info) 58 { 59 struct sockaddr_in *sin, null_sin; 60 61 memset(&null_sin, 0, sizeof(null_sin)); 62 63 sin = (struct sockaddr_in *)info->rti_info[RTAX_IFA]; 64 if (sin == NULL) 65 return; 66 67 printf("\tinet %s ", inet_ntoa(sin->sin_addr)); 68 69 if (flags & IFF_POINTOPOINT) { 70 /* note RTAX_BRD overlap with IFF_BROADCAST */ 71 sin = (struct sockaddr_in *)info->rti_info[RTAX_BRD]; 72 if (!sin) 73 sin = &null_sin; 74 printf("--> %s ", inet_ntoa(sin->sin_addr)); 75 } 76 77 sin = (struct sockaddr_in *)info->rti_info[RTAX_NETMASK]; 78 if (!sin) 79 sin = &null_sin; 80 printf("netmask 0x%lx ", (unsigned long)ntohl(sin->sin_addr.s_addr)); 81 82 if (flags & IFF_BROADCAST) { 83 /* note RTAX_BRD overlap with IFF_POINTOPOINT */ 84 sin = (struct sockaddr_in *)info->rti_info[RTAX_BRD]; 85 if (sin && sin->sin_addr.s_addr != 0) 86 printf("broadcast %s", inet_ntoa(sin->sin_addr)); 87 } 88 putchar('\n'); 89 } 90 91 #define SIN(x) ((struct sockaddr_in *) &(x)) 92 static struct sockaddr_in *sintab[] = { 93 SIN(in_ridreq.ifr_addr), SIN(in_addreq.ifra_addr), 94 SIN(in_addreq.ifra_mask), SIN(in_addreq.ifra_broadaddr) 95 }; 96 97 static void 98 in_getaddr(const char *s, int which) 99 { 100 struct sockaddr_in *sin = sintab[which]; 101 struct hostent *hp; 102 struct netent *np; 103 104 sin->sin_len = sizeof(*sin); 105 if (which != MASK) 106 sin->sin_family = AF_INET; 107 108 if (which == ADDR) { 109 char *p = NULL; 110 111 if((p = strrchr(s, '/')) != NULL) { 112 /* address is `name/masklen' */ 113 int masklen; 114 int ret; 115 struct sockaddr_in *min = sintab[MASK]; 116 *p = '\0'; 117 ret = sscanf(p+1, "%u", &masklen); 118 if(ret != 1 || (masklen < 0 || masklen > 32)) { 119 *p = '/'; 120 errx(1, "%s: bad value", s); 121 } 122 min->sin_len = sizeof(*min); 123 min->sin_addr.s_addr = htonl(~((1LL << (32 - masklen)) - 1) & 124 0xffffffff); 125 } 126 } 127 128 if (inet_aton(s, &sin->sin_addr)) 129 return; 130 if ((hp = gethostbyname(s)) != 0) 131 bcopy(hp->h_addr, (char *)&sin->sin_addr, 132 MIN(hp->h_length, sizeof(sin->sin_addr))); 133 else if ((np = getnetbyname(s)) != 0) 134 sin->sin_addr = inet_makeaddr(np->n_net, INADDR_ANY); 135 else 136 errx(1, "%s: bad value", s); 137 } 138 139 static void 140 in_status_tunnel(int s) 141 { 142 char src[NI_MAXHOST]; 143 char dst[NI_MAXHOST]; 144 struct ifreq ifr; 145 const struct sockaddr *sa = (const struct sockaddr *) &ifr.ifr_addr; 146 147 memset(&ifr, 0, sizeof(ifr)); 148 strncpy(ifr.ifr_name, name, IFNAMSIZ); 149 150 if (ioctl(s, SIOCGIFPSRCADDR, (caddr_t)&ifr) < 0) 151 return; 152 if (sa->sa_family != AF_INET) 153 return; 154 if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0, NI_NUMERICHOST) != 0) 155 src[0] = '\0'; 156 157 if (ioctl(s, SIOCGIFPDSTADDR, (caddr_t)&ifr) < 0) 158 return; 159 if (sa->sa_family != AF_INET) 160 return; 161 if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0, NI_NUMERICHOST) != 0) 162 dst[0] = '\0'; 163 164 printf("\ttunnel inet %s --> %s\n", src, dst); 165 } 166 167 static void 168 in_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres) 169 { 170 struct ifaliasreq addreq; 171 172 memset(&addreq, 0, sizeof(addreq)); 173 strncpy(addreq.ifra_name, name, IFNAMSIZ); 174 memcpy(&addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len); 175 memcpy(&addreq.ifra_dstaddr, dstres->ai_addr, dstres->ai_addr->sa_len); 176 177 if (ioctl(s, SIOCSIFPHYADDR, &addreq) < 0) 178 warn("SIOCSIFPHYADDR"); 179 } 180 181 static struct afswtch af_inet = { 182 .af_name = "inet", 183 .af_af = AF_INET, 184 .af_status = in_status, 185 .af_getaddr = in_getaddr, 186 .af_status_tunnel = in_status_tunnel, 187 .af_settunnel = in_set_tunnel, 188 .af_difaddr = SIOCDIFADDR, 189 .af_aifaddr = SIOCAIFADDR, 190 .af_ridreq = &in_ridreq, 191 .af_addreq = &in_addreq, 192 }; 193 194 static __constructor void 195 inet_ctor(void) 196 { 197 af_register(&af_inet); 198 } 199