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/route.h> /* for RTX_IFA */ 36 #include <net/if_dl.h> 37 #include <net/if_types.h> 38 #include <net/ethernet.h> 39 40 #include <err.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 rt_addrinfo *info) 51 { 52 const struct sockaddr_dl *sdl = 53 (const struct sockaddr_dl *) info->rti_info[RTAX_IFA]; 54 55 if (sdl != NULL && sdl->sdl_alen > 0) { 56 if (sdl->sdl_type == IFT_ETHER && 57 sdl->sdl_alen == ETHER_ADDR_LEN) 58 printf("\tether %s\n", 59 ether_ntoa((const struct ether_addr *)LLADDR(sdl))); 60 else { 61 int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0; 62 63 printf("\tlladdr %s\n", link_ntoa(sdl) + n); 64 } 65 } 66 } 67 68 static void 69 link_getaddr(const char *addr, int which) 70 { 71 char *temp; 72 struct sockaddr_dl sdl; 73 struct sockaddr *sa = &link_ridreq.ifr_addr; 74 75 if (which != ADDR) 76 errx(1, "can't set link-level netmask or broadcast"); 77 if ((temp = malloc(strlen(addr) + 2)) == NULL) 78 errx(1, "malloc failed"); 79 temp[0] = ':'; 80 strcpy(temp + 1, addr); 81 sdl.sdl_len = sizeof(sdl); 82 link_addr(temp, &sdl); 83 free(temp); 84 if (sdl.sdl_alen > sizeof(sa->sa_data)) 85 errx(1, "malformed link-level address"); 86 sa->sa_family = AF_LINK; 87 sa->sa_len = sdl.sdl_alen; 88 bcopy(LLADDR(&sdl), sa->sa_data, sdl.sdl_alen); 89 } 90 91 static struct afswtch af_link = { 92 .af_name = "link", 93 .af_af = AF_LINK, 94 .af_status = link_status, 95 .af_getaddr = link_getaddr, 96 .af_aifaddr = SIOCSIFLLADDR, 97 .af_addreq = &link_ridreq, 98 }; 99 static struct afswtch af_ether = { 100 .af_name = "ether", 101 .af_af = AF_LINK, 102 .af_status = link_status, 103 .af_getaddr = link_getaddr, 104 .af_aifaddr = SIOCSIFLLADDR, 105 .af_addreq = &link_ridreq, 106 }; 107 static struct afswtch af_lladdr = { 108 .af_name = "lladdr", 109 .af_af = AF_LINK, 110 .af_status = link_status, 111 .af_getaddr = link_getaddr, 112 .af_aifaddr = SIOCSIFLLADDR, 113 .af_addreq = &link_ridreq, 114 }; 115 116 static __constructor(101) void 117 link_ctor(void) 118 { 119 af_register(&af_link); 120 af_register(&af_ether); 121 af_register(&af_lladdr); 122 } 123