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_link.c,v 1.2 2004/12/31 19:46:27 sam Exp $ 30 */ 31 32 #include <sys/types.h> 33 #include <sys/ioctl.h> 34 #include <net/if.h> 35 #include <net/if_dl.h> 36 #include <net/if_types.h> 37 #include <net/ethernet.h> 38 39 #include <err.h> 40 #include <ifaddrs.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 45 #include "ifconfig.h" 46 47 static struct ifreq link_ridreq; 48 49 static void 50 link_status(int s __unused, const struct ifaddrs *ifa) 51 { 52 struct sockaddr_dl *sdl = 53 __DECONST(struct sockaddr_dl *, ifa->ifa_addr); 54 /* drop 'const' qualifier for LLADDR() to suppress warning */ 55 char addr[18], *p; 56 int n; 57 58 if (sdl == NULL || sdl->sdl_alen == 0) 59 return; 60 61 if (sdl->sdl_type == IFT_ETHER && sdl->sdl_alen == ETHER_ADDR_LEN) { 62 ether_ntoa_r((const struct ether_addr *)LLADDR(sdl), addr); 63 if (f_ether != NULL && strcmp(f_ether, "dash") == 0) { 64 p = addr; 65 while ((p = strchr(p, ':')) != NULL) 66 *p = '-'; 67 } 68 printf("\tether %s\n", addr); 69 } else { 70 n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0; 71 printf("\tlladdr %s\n", link_ntoa(sdl) + n); 72 } 73 } 74 75 static void 76 link_getaddr(const char *addr, int which) 77 { 78 struct sockaddr_dl sdl; 79 struct sockaddr *sa = &link_ridreq.ifr_addr; 80 char *temp; 81 82 if (which != ADDR) 83 errx(1, "can't set link-level netmask or broadcast"); 84 if ((temp = malloc(strlen(addr) + 2)) == NULL) 85 errx(1, "malloc failed"); 86 temp[0] = ':'; 87 strcpy(temp + 1, addr); 88 sdl.sdl_len = sizeof(sdl); 89 link_addr(temp, &sdl); 90 free(temp); 91 if (sdl.sdl_alen > sizeof(sa->sa_data)) 92 errx(1, "malformed link-level address"); 93 sa->sa_family = AF_LINK; 94 sa->sa_len = sdl.sdl_alen; 95 memcpy(sa->sa_data, LLADDR(&sdl), sdl.sdl_alen); 96 } 97 98 static struct afswtch af_link = { 99 .af_name = "link", 100 .af_af = AF_LINK, 101 .af_status = link_status, 102 .af_getaddr = link_getaddr, 103 .af_aifaddr = SIOCSIFLLADDR, 104 .af_addreq = &link_ridreq, 105 }; 106 static struct afswtch af_ether = { 107 .af_name = "ether", 108 .af_af = AF_LINK, 109 .af_status = link_status, 110 .af_getaddr = link_getaddr, 111 .af_aifaddr = SIOCSIFLLADDR, 112 .af_addreq = &link_ridreq, 113 }; 114 static struct afswtch af_lladdr = { 115 .af_name = "lladdr", 116 .af_af = AF_LINK, 117 .af_status = link_status, 118 .af_getaddr = link_getaddr, 119 .af_aifaddr = SIOCSIFLLADDR, 120 .af_addreq = &link_ridreq, 121 }; 122 123 __constructor(111) 124 static void 125 link_ctor(void) 126 { 127 af_register(&af_link); 128 af_register(&af_ether); 129 af_register(&af_lladdr); 130 } 131