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 && strcmp(f_ether, "dash") == 0) { 66 char *format_char; 67 68 while ((format_char = strchr(ether_format, ':')) != NULL) { 69 *format_char = '-'; 70 } 71 } 72 printf("\t%s %s\n", prefix, ether_format); 73 } 74 75 static void 76 print_lladdr(struct sockaddr_dl *sdl) 77 { 78 if (match_ether(sdl)) { 79 print_ether((struct ether_addr *)LLADDR(sdl), "ether"); 80 } else { 81 int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0; 82 printf("\tlladdr %s\n", link_ntoa(sdl) + n); 83 } 84 } 85 86 static void 87 print_pcp(int s) 88 { 89 if (ioctl(s, SIOCGLANPCP, (caddr_t)&ifr) == 0 && 90 ifr.ifr_lan_pcp != IFNET_PCP_NONE) 91 printf("\tpcp %d\n", ifr.ifr_lan_pcp); 92 } 93 94 #ifdef WITHOUT_NETLINK 95 static void 96 link_status(if_ctx *ctx, const struct ifaddrs *ifa) 97 { 98 /* XXX no const 'cuz LLADDR is defined wrong */ 99 struct sockaddr_dl *sdl; 100 struct ifreq ifr; 101 int rc, sock_hw; 102 static const u_char laggaddr[6] = {0}; 103 104 sdl = (struct sockaddr_dl *) ifa->ifa_addr; 105 if (sdl == NULL || sdl->sdl_alen == 0) 106 return; 107 108 print_lladdr(sdl); 109 110 /* 111 * Best-effort (i.e. failures are silent) to get original 112 * hardware address, as read by NIC driver at attach time. Only 113 * applies to Ethernet NICs (IFT_ETHER). However, laggX 114 * interfaces claim to be IFT_ETHER, and re-type their component 115 * Ethernet NICs as IFT_IEEE8023ADLAG. So, check for both. If 116 * the MAC is zeroed, then it's actually a lagg. 117 */ 118 if ((sdl->sdl_type != IFT_ETHER && 119 sdl->sdl_type != IFT_IEEE8023ADLAG) || 120 sdl->sdl_alen != ETHER_ADDR_LEN) 121 return; 122 123 strncpy(ifr.ifr_name, ifa->ifa_name, sizeof(ifr.ifr_name)); 124 memcpy(&ifr.ifr_addr, ifa->ifa_addr, sizeof(ifa->ifa_addr->sa_len)); 125 ifr.ifr_addr.sa_family = AF_LOCAL; 126 if ((sock_hw = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0) { 127 warn("socket(AF_LOCAL,SOCK_DGRAM)"); 128 return; 129 } 130 rc = ioctl(sock_hw, SIOCGHWADDR, &ifr); 131 close(sock_hw); 132 if (rc != 0) 133 return; 134 135 /* 136 * If this is definitely a lagg device or the hwaddr 137 * matches the link addr, don't bother. 138 */ 139 if (memcmp(ifr.ifr_addr.sa_data, laggaddr, sdl->sdl_alen) == 0 || 140 memcmp(ifr.ifr_addr.sa_data, LLADDR(sdl), sdl->sdl_alen) == 0) 141 goto pcp; 142 143 print_ether((const struct ether_addr *)&ifr.ifr_addr.sa_data, "hwaddr"); 144 pcp: 145 print_pcp(ctx->io_s); 146 } 147 148 #else 149 static uint8_t 150 convert_iftype(uint8_t iftype) 151 { 152 switch (iftype) { 153 case IFT_IEEE8023ADLAG: 154 return (IFT_ETHER); 155 case IFT_INFINIBANDLAG: 156 return (IFT_INFINIBAND); 157 } 158 return (iftype); 159 } 160 161 static void 162 link_status_nl(if_ctx *ctx, if_link_t *link, if_addr_t *ifa __unused) 163 { 164 if (link->ifla_address != NULL) { 165 struct sockaddr_dl sdl = { 166 .sdl_len = sizeof(struct sockaddr_dl), 167 .sdl_family = AF_LINK, 168 .sdl_type = convert_iftype(link->ifi_type), 169 .sdl_alen = NLA_DATA_LEN(link->ifla_address), 170 }; 171 memcpy(LLADDR(&sdl), NLA_DATA(link->ifla_address), sdl.sdl_alen); 172 print_lladdr(&sdl); 173 174 if (link->iflaf_orig_hwaddr != NULL) { 175 struct nlattr *hwaddr = link->iflaf_orig_hwaddr; 176 177 if (memcmp(NLA_DATA(hwaddr), NLA_DATA(link->ifla_address), sdl.sdl_alen)) 178 print_ether((struct ether_addr *)NLA_DATA(hwaddr), "hwaddr"); 179 } 180 } 181 if (convert_iftype(link->ifi_type) == IFT_ETHER) 182 print_pcp(ctx->io_s); 183 } 184 #endif 185 186 static void 187 link_getaddr(const char *addr, int which) 188 { 189 char *temp; 190 struct sockaddr_dl sdl; 191 struct sockaddr *sa = &link_ridreq.ifr_addr; 192 193 if (which != ADDR) 194 errx(1, "can't set link-level netmask or broadcast"); 195 if (!strcmp(addr, "random")) { 196 sdl.sdl_len = sizeof(sdl); 197 sdl.sdl_alen = ETHER_ADDR_LEN; 198 sdl.sdl_nlen = 0; 199 sdl.sdl_family = AF_LINK; 200 arc4random_buf(&sdl.sdl_data, ETHER_ADDR_LEN); 201 /* Non-multicast and claim it is locally administered. */ 202 sdl.sdl_data[0] &= 0xfc; 203 sdl.sdl_data[0] |= 0x02; 204 } else { 205 if ((temp = malloc(strlen(addr) + 2)) == NULL) 206 errx(1, "malloc failed"); 207 temp[0] = ':'; 208 strcpy(temp + 1, addr); 209 sdl.sdl_len = sizeof(sdl); 210 link_addr(temp, &sdl); 211 free(temp); 212 } 213 if (sdl.sdl_alen > sizeof(sa->sa_data)) 214 errx(1, "malformed link-level address"); 215 sa->sa_family = AF_LINK; 216 sa->sa_len = sdl.sdl_alen; 217 bcopy(LLADDR(&sdl), sa->sa_data, sdl.sdl_alen); 218 } 219 220 static struct afswtch af_link = { 221 .af_name = "link", 222 .af_af = AF_LINK, 223 #ifdef WITHOUT_NETLINK 224 .af_status = link_status, 225 #else 226 .af_status = link_status_nl, 227 #endif 228 .af_getaddr = link_getaddr, 229 .af_aifaddr = SIOCSIFLLADDR, 230 .af_addreq = &link_ridreq, 231 .af_exec = af_exec_ioctl, 232 }; 233 static struct afswtch af_ether = { 234 .af_name = "ether", 235 .af_af = AF_LINK, 236 #ifdef WITHOUT_NETLINK 237 .af_status = link_status, 238 #else 239 .af_status = link_status_nl, 240 #endif 241 .af_getaddr = link_getaddr, 242 .af_aifaddr = SIOCSIFLLADDR, 243 .af_addreq = &link_ridreq, 244 .af_exec = af_exec_ioctl, 245 }; 246 static struct afswtch af_lladdr = { 247 .af_name = "lladdr", 248 .af_af = AF_LINK, 249 #ifdef WITHOUT_NETLINK 250 .af_status = link_status, 251 #else 252 .af_status = link_status_nl, 253 #endif 254 .af_getaddr = link_getaddr, 255 .af_aifaddr = SIOCSIFLLADDR, 256 .af_addreq = &link_ridreq, 257 .af_exec = af_exec_ioctl, 258 }; 259 260 static __constructor void 261 link_ctor(void) 262 { 263 af_register(&af_link); 264 af_register(&af_ether); 265 af_register(&af_lladdr); 266 } 267