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 31 static const char rcsid[] = 32 "$FreeBSD$"; 33 #endif /* not lint */ 34 35 #include <sys/types.h> 36 #include <sys/ioctl.h> 37 #include <sys/socket.h> 38 #include <net/if.h> 39 #include <net/route.h> /* for RTX_IFA */ 40 41 #include <err.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <unistd.h> 46 47 #include <netinet/in.h> 48 #include <net/if_var.h> /* for struct ifaddr */ 49 #include <netinet/in_var.h> 50 #include <arpa/inet.h> 51 #include <netdb.h> 52 53 #include "ifconfig.h" 54 55 static struct ifaliasreq in_addreq; 56 static struct ifreq in_ridreq; 57 58 static void 59 in_status(int s __unused, const struct rt_addrinfo * info) 60 { 61 struct sockaddr_in *sin, null_sin; 62 63 memset(&null_sin, 0, sizeof(null_sin)); 64 65 sin = (struct sockaddr_in *)info->rti_info[RTAX_IFA]; 66 if (sin == NULL) 67 return; 68 69 printf("\tinet %s ", inet_ntoa(sin->sin_addr)); 70 71 if (flags & IFF_POINTOPOINT) { 72 /* note RTAX_BRD overlap with IFF_BROADCAST */ 73 sin = (struct sockaddr_in *)info->rti_info[RTAX_BRD]; 74 if (!sin) 75 sin = &null_sin; 76 printf("--> %s ", inet_ntoa(sin->sin_addr)); 77 } 78 79 sin = (struct sockaddr_in *)info->rti_info[RTAX_NETMASK]; 80 if (!sin) 81 sin = &null_sin; 82 printf("netmask 0x%lx ", (unsigned long)ntohl(sin->sin_addr.s_addr)); 83 84 if (flags & IFF_BROADCAST) { 85 /* note RTAX_BRD overlap with IFF_POINTOPOINT */ 86 sin = (struct sockaddr_in *)info->rti_info[RTAX_BRD]; 87 if (sin && sin->sin_addr.s_addr != 0) 88 printf("broadcast %s", inet_ntoa(sin->sin_addr)); 89 } 90 putchar('\n'); 91 } 92 93 #define SIN(x) ((struct sockaddr_in *) &(x)) 94 static struct sockaddr_in *sintab[] = { 95 SIN(in_ridreq.ifr_addr), SIN(in_addreq.ifra_addr), 96 SIN(in_addreq.ifra_mask), SIN(in_addreq.ifra_broadaddr) 97 }; 98 99 static void 100 in_getaddr(const char *s, int which) 101 { 102 #define MIN(a,b) ((a)<(b)?(a):(b)) 103 struct sockaddr_in *sin = sintab[which]; 104 struct hostent *hp; 105 struct netent *np; 106 107 sin->sin_len = sizeof(*sin); 108 if (which != MASK) 109 sin->sin_family = AF_INET; 110 111 if (which == ADDR) { 112 char *p = NULL; 113 114 if((p = strrchr(s, '/')) != NULL) { 115 /* address is `name/masklen' */ 116 int masklen; 117 int ret; 118 struct sockaddr_in *min = sintab[MASK]; 119 *p = '\0'; 120 ret = sscanf(p+1, "%u", &masklen); 121 if(ret != 1 || (masklen < 0 || masklen > 32)) { 122 *p = '/'; 123 errx(1, "%s: bad value", s); 124 } 125 min->sin_len = sizeof(*min); 126 min->sin_addr.s_addr = htonl(~((1LL << (32 - masklen)) - 1) & 127 0xffffffff); 128 } 129 } 130 131 if (inet_aton(s, &sin->sin_addr)) 132 return; 133 if ((hp = gethostbyname(s)) != 0) 134 bcopy(hp->h_addr, (char *)&sin->sin_addr, 135 MIN(hp->h_length, sizeof(sin->sin_addr))); 136 else if ((np = getnetbyname(s)) != 0) 137 sin->sin_addr = inet_makeaddr(np->n_net, INADDR_ANY); 138 else 139 errx(1, "%s: bad value", s); 140 #undef MIN 141 } 142 143 static void 144 in_status_tunnel(int s) 145 { 146 char src[NI_MAXHOST]; 147 char dst[NI_MAXHOST]; 148 struct ifreq ifr; 149 const struct sockaddr *sa = (const struct sockaddr *) &ifr.ifr_addr; 150 151 memset(&ifr, 0, sizeof(ifr)); 152 strncpy(ifr.ifr_name, name, IFNAMSIZ); 153 154 if (ioctl(s, SIOCGIFPSRCADDR, (caddr_t)&ifr) < 0) 155 return; 156 if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0, NI_NUMERICHOST) != 0) 157 src[0] = '\0'; 158 159 if (ioctl(s, SIOCGIFPDSTADDR, (caddr_t)&ifr) < 0) 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