af_inet.c revision 147437
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 147437 2005-06-16 19:37:09Z ume $"; 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#include <net/route.h> /* for RTX_IFA */ 40138593Ssam 41138593Ssam#include <err.h> 42138593Ssam#include <stdio.h> 43138593Ssam#include <stdlib.h> 44138593Ssam#include <string.h> 45138593Ssam#include <unistd.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 55138593Ssamstatic struct ifaliasreq in_addreq; 56138593Ssamstatic struct ifreq in_ridreq; 57138593Ssam 58138593Ssamstatic void 59138593Ssamin_status(int s __unused, const struct rt_addrinfo * info) 60138593Ssam{ 61138593Ssam struct sockaddr_in *sin, null_sin; 62138593Ssam 63138593Ssam memset(&null_sin, 0, sizeof(null_sin)); 64138593Ssam 65138593Ssam sin = (struct sockaddr_in *)info->rti_info[RTAX_IFA]; 66138593Ssam if (sin == NULL) 67138593Ssam return; 68138593Ssam 69138593Ssam printf("\tinet %s ", inet_ntoa(sin->sin_addr)); 70138593Ssam 71138593Ssam if (flags & IFF_POINTOPOINT) { 72138593Ssam /* note RTAX_BRD overlap with IFF_BROADCAST */ 73138593Ssam sin = (struct sockaddr_in *)info->rti_info[RTAX_BRD]; 74138593Ssam if (!sin) 75138593Ssam sin = &null_sin; 76138593Ssam printf("--> %s ", inet_ntoa(sin->sin_addr)); 77138593Ssam } 78138593Ssam 79138593Ssam sin = (struct sockaddr_in *)info->rti_info[RTAX_NETMASK]; 80138593Ssam if (!sin) 81138593Ssam sin = &null_sin; 82138593Ssam printf("netmask 0x%lx ", (unsigned long)ntohl(sin->sin_addr.s_addr)); 83138593Ssam 84138593Ssam if (flags & IFF_BROADCAST) { 85138593Ssam /* note RTAX_BRD overlap with IFF_POINTOPOINT */ 86138593Ssam sin = (struct sockaddr_in *)info->rti_info[RTAX_BRD]; 87138593Ssam if (sin && sin->sin_addr.s_addr != 0) 88138593Ssam printf("broadcast %s", inet_ntoa(sin->sin_addr)); 89138593Ssam } 90138593Ssam putchar('\n'); 91138593Ssam} 92138593Ssam 93138593Ssam#define SIN(x) ((struct sockaddr_in *) &(x)) 94138593Ssamstatic struct sockaddr_in *sintab[] = { 95138593Ssam SIN(in_ridreq.ifr_addr), SIN(in_addreq.ifra_addr), 96138593Ssam SIN(in_addreq.ifra_mask), SIN(in_addreq.ifra_broadaddr) 97138593Ssam}; 98138593Ssam 99138593Ssamstatic void 100138593Ssamin_getaddr(const char *s, int which) 101138593Ssam{ 102138593Ssam#define MIN(a,b) ((a)<(b)?(a):(b)) 103138593Ssam struct sockaddr_in *sin = sintab[which]; 104138593Ssam struct hostent *hp; 105138593Ssam struct netent *np; 106138593Ssam 107138593Ssam sin->sin_len = sizeof(*sin); 108138593Ssam if (which != MASK) 109138593Ssam sin->sin_family = AF_INET; 110138593Ssam 111138593Ssam if (which == ADDR) { 112138593Ssam char *p = NULL; 113138593Ssam 114138593Ssam if((p = strrchr(s, '/')) != NULL) { 115138593Ssam /* address is `name/masklen' */ 116138593Ssam int masklen; 117138593Ssam int ret; 118138593Ssam struct sockaddr_in *min = sintab[MASK]; 119138593Ssam *p = '\0'; 120138593Ssam ret = sscanf(p+1, "%u", &masklen); 121138593Ssam if(ret != 1 || (masklen < 0 || masklen > 32)) { 122138593Ssam *p = '/'; 123138593Ssam errx(1, "%s: bad value", s); 124138593Ssam } 125138593Ssam min->sin_len = sizeof(*min); 126138593Ssam min->sin_addr.s_addr = htonl(~((1LL << (32 - masklen)) - 1) & 127138593Ssam 0xffffffff); 128138593Ssam } 129138593Ssam } 130138593Ssam 131138593Ssam if (inet_aton(s, &sin->sin_addr)) 132138593Ssam return; 133138593Ssam if ((hp = gethostbyname(s)) != 0) 134138593Ssam bcopy(hp->h_addr, (char *)&sin->sin_addr, 135138593Ssam MIN(hp->h_length, sizeof(sin->sin_addr))); 136138593Ssam else if ((np = getnetbyname(s)) != 0) 137138593Ssam sin->sin_addr = inet_makeaddr(np->n_net, INADDR_ANY); 138138593Ssam else 139138593Ssam errx(1, "%s: bad value", s); 140138593Ssam#undef MIN 141138593Ssam} 142138593Ssam 143138593Ssamstatic void 144138593Ssamin_status_tunnel(int s) 145138593Ssam{ 146138593Ssam char src[NI_MAXHOST]; 147138593Ssam char dst[NI_MAXHOST]; 148138593Ssam struct ifreq ifr; 149138593Ssam const struct sockaddr *sa = (const struct sockaddr *) &ifr.ifr_addr; 150138593Ssam 151138593Ssam memset(&ifr, 0, sizeof(ifr)); 152138593Ssam strncpy(ifr.ifr_name, name, IFNAMSIZ); 153138593Ssam 154138593Ssam if (ioctl(s, SIOCGIFPSRCADDR, (caddr_t)&ifr) < 0) 155138593Ssam return; 156147437Sume if (sa->sa_family != AF_INET) 157147437Sume return; 158138593Ssam if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0, NI_NUMERICHOST) != 0) 159138593Ssam src[0] = '\0'; 160138593Ssam 161138593Ssam if (ioctl(s, SIOCGIFPDSTADDR, (caddr_t)&ifr) < 0) 162138593Ssam return; 163147437Sume if (sa->sa_family != AF_INET) 164147437Sume return; 165138593Ssam if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0, NI_NUMERICHOST) != 0) 166138593Ssam dst[0] = '\0'; 167138593Ssam 168138593Ssam printf("\ttunnel inet %s --> %s\n", src, dst); 169138593Ssam} 170138593Ssam 171138593Ssamstatic void 172138593Ssamin_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres) 173138593Ssam{ 174138593Ssam struct ifaliasreq addreq; 175138593Ssam 176138593Ssam memset(&addreq, 0, sizeof(addreq)); 177138593Ssam strncpy(addreq.ifra_name, name, IFNAMSIZ); 178138593Ssam memcpy(&addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len); 179138593Ssam memcpy(&addreq.ifra_dstaddr, dstres->ai_addr, dstres->ai_addr->sa_len); 180138593Ssam 181138593Ssam if (ioctl(s, SIOCSIFPHYADDR, &addreq) < 0) 182138593Ssam warn("SIOCSIFPHYADDR"); 183138593Ssam} 184138593Ssam 185138593Ssamstatic struct afswtch af_inet = { 186138593Ssam .af_name = "inet", 187138593Ssam .af_af = AF_INET, 188138593Ssam .af_status = in_status, 189138593Ssam .af_getaddr = in_getaddr, 190138593Ssam .af_status_tunnel = in_status_tunnel, 191138593Ssam .af_settunnel = in_set_tunnel, 192138593Ssam .af_difaddr = SIOCDIFADDR, 193138593Ssam .af_aifaddr = SIOCAIFADDR, 194138593Ssam .af_ridreq = &in_ridreq, 195138593Ssam .af_addreq = &in_addreq, 196138593Ssam}; 197138593Ssam 198138593Ssamstatic __constructor void 199138593Ssaminet_ctor(void) 200138593Ssam{ 201138593Ssam af_register(&af_inet); 202138593Ssam} 203