1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef lint 33 static const char rcsid[] = 34 "$FreeBSD$"; 35 #endif /* not lint */ 36 37 #include <sys/types.h> 38 #include <sys/ioctl.h> 39 #include <sys/socket.h> 40 #include <net/if.h> 41 42 #include <err.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <ifaddrs.h> 47 #include <unistd.h> 48 49 #include <net/if_dl.h> 50 #include <net/if_types.h> 51 #include <net/ethernet.h> 52 53 #include "ifconfig.h" 54 #include "ifconfig_netlink.h" 55 56 static struct ifreq link_ridreq; 57 58 extern char *f_ether; 59 60 static void 61 print_ether(const struct ether_addr *addr, const char *prefix) 62 { 63 char *ether_format = ether_ntoa(addr); 64 65 if (f_ether != NULL) { 66 if (strcmp(f_ether, "dash") == 0) { 67 char *format_char; 68 69 while ((format_char = strchr(ether_format, ':')) != NULL) { 70 *format_char = '-'; 71 } 72 } else if (strcmp(f_ether, "dotted") == 0) { 73 /* Indices 0 and 1 is kept as is. */ 74 ether_format[ 2] = ether_format[ 3]; 75 ether_format[ 3] = ether_format[ 4]; 76 ether_format[ 4] = '.'; 77 ether_format[ 5] = ether_format[ 6]; 78 ether_format[ 6] = ether_format[ 7]; 79 ether_format[ 7] = ether_format[ 9]; 80 ether_format[ 8] = ether_format[10]; 81 ether_format[ 9] = '.'; 82 ether_format[10] = ether_format[12]; 83 ether_format[11] = ether_format[13]; 84 ether_format[12] = ether_format[15]; 85 ether_format[13] = ether_format[16]; 86 ether_format[14] = '\0'; 87 } 88 } 89 printf("\t%s %s\n", prefix, ether_format); 90 } 91 92 static void 93 print_lladdr(struct sockaddr_dl *sdl) 94 { 95 if (match_ether(sdl)) { 96 print_ether((struct ether_addr *)LLADDR(sdl), "ether"); 97 } else { 98 int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0; 99 printf("\tlladdr %s\n", link_ntoa(sdl) + n); 100 } 101 } 102 103 static void 104 print_pcp(if_ctx *ctx) 105 { 106 struct ifreq ifr = {}; 107 108 if (ioctl_ctx_ifr(ctx, SIOCGLANPCP, &ifr) == 0 && 109 ifr.ifr_lan_pcp != IFNET_PCP_NONE) 110 printf("\tpcp %d\n", ifr.ifr_lan_pcp); 111 } 112 113 #ifdef WITHOUT_NETLINK 114 static void 115 link_status(if_ctx *ctx, const struct ifaddrs *ifa) 116 { 117 /* XXX no const 'cuz LLADDR is defined wrong */ 118 struct sockaddr_dl *sdl; 119 struct ifreq ifr; 120 int rc, sock_hw; 121 static const u_char laggaddr[6] = {0}; 122 123 sdl = satosdl(ifa->ifa_addr); 124 if (sdl == NULL || sdl->sdl_alen == 0) 125 return; 126 127 print_lladdr(sdl); 128 129 /* 130 * Best-effort (i.e. failures are silent) to get original 131 * hardware address, as read by NIC driver at attach time. Only 132 * applies to Ethernet NICs (IFT_ETHER). However, laggX 133 * interfaces claim to be IFT_ETHER, and re-type their component 134 * Ethernet NICs as IFT_IEEE8023ADLAG. So, check for both. If 135 * the MAC is zeroed, then it's actually a lagg. 136 */ 137 if ((sdl->sdl_type != IFT_ETHER && 138 sdl->sdl_type != IFT_IEEE8023ADLAG) || 139 sdl->sdl_alen != ETHER_ADDR_LEN) 140 return; 141 142 strncpy(ifr.ifr_name, ifa->ifa_name, sizeof(ifr.ifr_name)); 143 memcpy(&ifr.ifr_addr, ifa->ifa_addr, sizeof(ifa->ifa_addr->sa_len)); 144 ifr.ifr_addr.sa_family = AF_LOCAL; 145 if ((sock_hw = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0) { 146 warn("socket(AF_LOCAL,SOCK_DGRAM)"); 147 return; 148 } 149 rc = ioctl(sock_hw, SIOCGHWADDR, &ifr); 150 close(sock_hw); 151 if (rc != 0) 152 return; 153 154 /* 155 * If this is definitely a lagg device or the hwaddr 156 * matches the link addr, don't bother. 157 */ 158 if (memcmp(ifr.ifr_addr.sa_data, laggaddr, sdl->sdl_alen) == 0 || 159 memcmp(ifr.ifr_addr.sa_data, LLADDR(sdl), sdl->sdl_alen) == 0) 160 goto pcp; 161 162 print_ether((const struct ether_addr *)&ifr.ifr_addr.sa_data, "hwaddr"); 163 pcp: 164 print_pcp(ctx); 165 } 166 167 #else 168 169 static void 170 link_status_nl(if_ctx *ctx, if_link_t *link, if_addr_t *ifa __unused) 171 { 172 if (link->ifla_address != NULL) { 173 struct sockaddr_dl sdl = { 174 .sdl_len = sizeof(struct sockaddr_dl), 175 .sdl_family = AF_LINK, 176 .sdl_type = convert_iftype(link->ifi_type), 177 .sdl_alen = NLA_DATA_LEN(link->ifla_address), 178 }; 179 memcpy(LLADDR(&sdl), NLA_DATA(link->ifla_address), sdl.sdl_alen); 180 print_lladdr(&sdl); 181 182 if (link->iflaf_orig_hwaddr != NULL) { 183 struct nlattr *hwaddr = link->iflaf_orig_hwaddr; 184 185 if (memcmp(NLA_DATA(hwaddr), NLA_DATA(link->ifla_address), sdl.sdl_alen)) 186 print_ether((struct ether_addr *)NLA_DATA(hwaddr), "hwaddr"); 187 } 188 } 189 if (convert_iftype(link->ifi_type) == IFT_ETHER) 190 print_pcp(ctx); 191 } 192 #endif 193 194 static void 195 link_getaddr(const char *addr, int which) 196 { 197 char *temp; 198 struct sockaddr_dl sdl; 199 struct sockaddr *sa = &link_ridreq.ifr_addr; 200 201 if (which != ADDR) 202 errx(1, "can't set link-level netmask or broadcast"); 203 if (!strcmp(addr, "random")) { 204 sdl.sdl_len = sizeof(sdl); 205 sdl.sdl_alen = ETHER_ADDR_LEN; 206 sdl.sdl_nlen = 0; 207 sdl.sdl_family = AF_LINK; 208 arc4random_buf(&sdl.sdl_data, ETHER_ADDR_LEN); 209 /* Non-multicast and claim it is locally administered. */ 210 sdl.sdl_data[0] &= 0xfc; 211 sdl.sdl_data[0] |= 0x02; 212 } else { 213 if ((temp = malloc(strlen(addr) + 2)) == NULL) 214 errx(1, "malloc failed"); 215 temp[0] = ':'; 216 strcpy(temp + 1, addr); 217 sdl.sdl_len = sizeof(sdl); 218 link_addr(temp, &sdl); 219 free(temp); 220 } 221 if (sdl.sdl_alen > sizeof(sa->sa_data)) 222 errx(1, "malformed link-level address"); 223 sa->sa_family = AF_LINK; 224 sa->sa_len = sdl.sdl_alen; 225 bcopy(LLADDR(&sdl), sa->sa_data, sdl.sdl_alen); 226 } 227 228 static struct afswtch af_link = { 229 .af_name = "link", 230 .af_af = AF_LINK, 231 #ifdef WITHOUT_NETLINK 232 .af_status = link_status, 233 #else 234 .af_status = link_status_nl, 235 #endif 236 .af_getaddr = link_getaddr, 237 .af_aifaddr = SIOCSIFLLADDR, 238 .af_addreq = &link_ridreq, 239 .af_exec = af_exec_ioctl, 240 }; 241 static struct afswtch af_ether = { 242 .af_name = "ether", 243 .af_af = AF_LINK, 244 #ifdef WITHOUT_NETLINK 245 .af_status = link_status, 246 #else 247 .af_status = link_status_nl, 248 #endif 249 .af_getaddr = link_getaddr, 250 .af_aifaddr = SIOCSIFLLADDR, 251 .af_addreq = &link_ridreq, 252 .af_exec = af_exec_ioctl, 253 }; 254 static struct afswtch af_lladdr = { 255 .af_name = "lladdr", 256 .af_af = AF_LINK, 257 #ifdef WITHOUT_NETLINK 258 .af_status = link_status, 259 #else 260 .af_status = link_status_nl, 261 #endif 262 .af_getaddr = link_getaddr, 263 .af_aifaddr = SIOCSIFLLADDR, 264 .af_addreq = &link_ridreq, 265 .af_exec = af_exec_ioctl, 266 }; 267 268 static __constructor void 269 link_ctor(void) 270 { 271 af_register(&af_link); 272 af_register(&af_ether); 273 af_register(&af_lladdr); 274 } 275