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 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 40 #include <err.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <ifaddrs.h> 45 46 #include <net/if_dl.h> 47 #include <net/if_types.h> 48 #include <net/ethernet.h> 49 50 #include "ifconfig.h" 51 52 static struct ifreq link_ridreq; 53 54 extern char *f_ether; 55 56 static void 57 link_status(int s __unused, const struct ifaddrs *ifa) 58 { 59 /* XXX no const 'cuz LLADDR is defined wrong */ 60 struct sockaddr_dl *sdl = (struct sockaddr_dl *) ifa->ifa_addr; 61 char *ether_format, *format_char; 62 63 if (sdl != NULL && sdl->sdl_alen > 0) { 64 if ((sdl->sdl_type == IFT_ETHER || 65 sdl->sdl_type == IFT_L2VLAN || 66 sdl->sdl_type == IFT_BRIDGE) && 67 sdl->sdl_alen == ETHER_ADDR_LEN) { 68 ether_format = ether_ntoa((struct ether_addr *)LLADDR(sdl)); 69 if (f_ether != NULL && strcmp(f_ether, "dash") == 0) { 70 for (format_char = strchr(ether_format, ':'); 71 format_char != NULL; 72 format_char = strchr(ether_format, ':')) 73 *format_char = '-'; 74 } 75 printf("\tether %s\n", ether_format); 76 } else { 77 int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0; 78 79 printf("\tlladdr %s\n", link_ntoa(sdl) + n); 80 } 81 } 82 } 83 84 static void 85 link_getaddr(const char *addr, int which) 86 { 87 char *temp; 88 struct sockaddr_dl sdl; 89 struct sockaddr *sa = &link_ridreq.ifr_addr; 90 91 if (which != ADDR) 92 errx(1, "can't set link-level netmask or broadcast"); 93 if (!strcmp(addr, "random")) { 94 sdl.sdl_len = sizeof(sdl); 95 sdl.sdl_alen = ETHER_ADDR_LEN; 96 sdl.sdl_nlen = 0; 97 sdl.sdl_family = AF_LINK; 98 arc4random_buf(&sdl.sdl_data, ETHER_ADDR_LEN); 99 /* Non-multicast and claim it is locally administered. */ 100 sdl.sdl_data[0] &= 0xfc; 101 sdl.sdl_data[0] |= 0x02; 102 } else { 103 if ((temp = malloc(strlen(addr) + 2)) == NULL) 104 errx(1, "malloc failed"); 105 temp[0] = ':'; 106 strcpy(temp + 1, addr); 107 sdl.sdl_len = sizeof(sdl); 108 link_addr(temp, &sdl); 109 free(temp); 110 } 111 if (sdl.sdl_alen > sizeof(sa->sa_data)) 112 errx(1, "malformed link-level address"); 113 sa->sa_family = AF_LINK; 114 sa->sa_len = sdl.sdl_alen; 115 bcopy(LLADDR(&sdl), sa->sa_data, sdl.sdl_alen); 116 } 117 118 static struct afswtch af_link = { 119 .af_name = "link", 120 .af_af = AF_LINK, 121 .af_status = link_status, 122 .af_getaddr = link_getaddr, 123 .af_aifaddr = SIOCSIFLLADDR, 124 .af_addreq = &link_ridreq, 125 }; 126 static struct afswtch af_ether = { 127 .af_name = "ether", 128 .af_af = AF_LINK, 129 .af_status = link_status, 130 .af_getaddr = link_getaddr, 131 .af_aifaddr = SIOCSIFLLADDR, 132 .af_addreq = &link_ridreq, 133 }; 134 static struct afswtch af_lladdr = { 135 .af_name = "lladdr", 136 .af_af = AF_LINK, 137 .af_status = link_status, 138 .af_getaddr = link_getaddr, 139 .af_aifaddr = SIOCSIFLLADDR, 140 .af_addreq = &link_ridreq, 141 }; 142 143 static __constructor void 144 link_ctor(void) 145 { 146 af_register(&af_link); 147 af_register(&af_ether); 148 af_register(&af_lladdr); 149 } 150