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 <sys/socket.h> 35 #include <net/if.h> 36 #include <net/route.h> /* for RTX_IFA */ 37 38 #include <err.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 43 #include <net/if_dl.h> 44 #include <net/if_types.h> 45 #include <net/ethernet.h> 46 47 #include "ifconfig.h" 48 49 static struct ifreq link_ridreq; 50 51 static void 52 link_status(int s __unused, const struct rt_addrinfo *info) 53 { 54 const struct sockaddr_dl *sdl = 55 (const struct sockaddr_dl *) info->rti_info[RTAX_IFA]; 56 57 if (sdl != NULL && sdl->sdl_alen > 0) { 58 if (sdl->sdl_type == IFT_ETHER && 59 sdl->sdl_alen == ETHER_ADDR_LEN) 60 printf("\tether %s\n", 61 ether_ntoa((const struct ether_addr *)LLADDR(sdl))); 62 else { 63 int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0; 64 65 printf("\tlladdr %s\n", link_ntoa(sdl) + n); 66 } 67 } 68 } 69 70 static void 71 link_getaddr(const char *addr, int which) 72 { 73 char *temp; 74 struct sockaddr_dl sdl; 75 struct sockaddr *sa = &link_ridreq.ifr_addr; 76 77 if (which != ADDR) 78 errx(1, "can't set link-level netmask or broadcast"); 79 if ((temp = malloc(strlen(addr) + 2)) == NULL) 80 errx(1, "malloc failed"); 81 temp[0] = ':'; 82 strcpy(temp + 1, addr); 83 sdl.sdl_len = sizeof(sdl); 84 link_addr(temp, &sdl); 85 free(temp); 86 if (sdl.sdl_alen > sizeof(sa->sa_data)) 87 errx(1, "malformed link-level address"); 88 sa->sa_family = AF_LINK; 89 sa->sa_len = sdl.sdl_alen; 90 bcopy(LLADDR(&sdl), sa->sa_data, sdl.sdl_alen); 91 } 92 93 static struct afswtch af_link = { 94 .af_name = "link", 95 .af_af = AF_LINK, 96 .af_status = link_status, 97 .af_getaddr = link_getaddr, 98 .af_aifaddr = SIOCSIFLLADDR, 99 .af_addreq = &link_ridreq, 100 }; 101 static struct afswtch af_ether = { 102 .af_name = "ether", 103 .af_af = AF_LINK, 104 .af_status = link_status, 105 .af_getaddr = link_getaddr, 106 .af_aifaddr = SIOCSIFLLADDR, 107 .af_addreq = &link_ridreq, 108 }; 109 static struct afswtch af_lladdr = { 110 .af_name = "lladdr", 111 .af_af = AF_LINK, 112 .af_status = link_status, 113 .af_getaddr = link_getaddr, 114 .af_aifaddr = SIOCSIFLLADDR, 115 .af_addreq = &link_ridreq, 116 }; 117 118 static __constructor(101) void 119 link_ctor(void) 120 { 121 af_register(&af_link); 122 af_register(&af_ether); 123 af_register(&af_lladdr); 124 } 125