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718e3744 | 1 | /* |
2 | * Interface looking up by ioctl (). | |
3 | * Copyright (C) 1997, 98 Kunihiro Ishiguro | |
4 | * | |
5 | * This file is part of GNU Zebra. | |
6 | * | |
7 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2, or (at your option) any | |
10 | * later version. | |
11 | * | |
12 | * GNU Zebra is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
896014f4 DL |
17 | * You should have received a copy of the GNU General Public License along |
18 | * with this program; see the file COPYING; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 20 | */ |
21 | ||
22 | #include <zebra.h> | |
23 | ||
ddfeb486 DL |
24 | #ifdef OPEN_BSD |
25 | ||
718e3744 | 26 | #include "if.h" |
27 | #include "sockunion.h" | |
28 | #include "prefix.h" | |
29 | #include "ioctl.h" | |
30 | #include "connected.h" | |
31 | #include "memory.h" | |
4a1ab8e4 | 32 | #include "zebra_memory.h" |
718e3744 | 33 | #include "log.h" |
8f7d9fc0 | 34 | #include "vrf.h" |
82283592 | 35 | #include "vty.h" |
43e52561 | 36 | #include "lib_errors.h" |
718e3744 | 37 | |
38 | #include "zebra/interface.h" | |
8f7d9fc0 | 39 | #include "zebra/rib.h" |
f7dae312 | 40 | #include "zebra/rt.h" |
364fed6b | 41 | #include "zebra/zebra_errors.h" |
718e3744 | 42 | |
24f5e2fc DL |
43 | #include <ifaddrs.h> |
44 | ||
718e3744 | 45 | /* Interface looking up using infamous SIOCGIFCONF. */ |
d62a17ae | 46 | static int interface_list_ioctl(void) |
718e3744 | 47 | { |
d62a17ae | 48 | int ret; |
49 | int sock; | |
718e3744 | 50 | #define IFNUM_BASE 32 |
d62a17ae | 51 | int ifnum; |
52 | struct ifreq *ifreq; | |
53 | struct ifconf ifconf; | |
54 | struct interface *ifp; | |
55 | int n; | |
56 | int lastlen; | |
57 | ||
58 | /* Normally SIOCGIFCONF works with AF_INET socket. */ | |
59 | sock = socket(AF_INET, SOCK_DGRAM, 0); | |
60 | if (sock < 0) { | |
450971aa | 61 | flog_err_sys(EC_LIB_SOCKET, |
9df414fe QY |
62 | "Can't make AF_INET socket stream: %s", |
63 | safe_strerror(errno)); | |
d62a17ae | 64 | return -1; |
65 | } | |
66 | ||
67 | /* Set initial ifreq count. This will be double when SIOCGIFCONF | |
68 | fail. Solaris has SIOCGIFNUM. */ | |
718e3744 | 69 | #ifdef SIOCGIFNUM |
d62a17ae | 70 | ret = ioctl(sock, SIOCGIFNUM, &ifnum); |
71 | if (ret < 0) | |
72 | ifnum = IFNUM_BASE; | |
73 | else | |
74 | ifnum++; | |
718e3744 | 75 | #else |
d62a17ae | 76 | ifnum = IFNUM_BASE; |
718e3744 | 77 | #endif /* SIOCGIFNUM */ |
78 | ||
d62a17ae | 79 | ifconf.ifc_buf = NULL; |
80 | ||
81 | lastlen = 0; | |
82 | /* Loop until SIOCGIFCONF success. */ | |
83 | for (;;) { | |
84 | ifconf.ifc_len = sizeof(struct ifreq) * ifnum; | |
85 | ifconf.ifc_buf = | |
86 | XREALLOC(MTYPE_TMP, ifconf.ifc_buf, ifconf.ifc_len); | |
87 | ||
88 | ret = ioctl(sock, SIOCGIFCONF, &ifconf); | |
89 | ||
90 | if (ret < 0) { | |
450971aa | 91 | flog_err_sys(EC_LIB_SYSTEM_CALL, "SIOCGIFCONF: %s", |
9df414fe | 92 | safe_strerror(errno)); |
d62a17ae | 93 | goto end; |
94 | } | |
95 | /* Repeatedly get info til buffer fails to grow. */ | |
96 | if (ifconf.ifc_len > lastlen) { | |
97 | lastlen = ifconf.ifc_len; | |
98 | ifnum += 10; | |
99 | continue; | |
100 | } | |
101 | /* Success. */ | |
102 | break; | |
718e3744 | 103 | } |
718e3744 | 104 | |
d62a17ae | 105 | /* Allocate interface. */ |
106 | ifreq = ifconf.ifc_req; | |
718e3744 | 107 | |
108 | #ifdef OPEN_BSD | |
d62a17ae | 109 | for (n = 0; n < ifconf.ifc_len;) { |
110 | unsigned int size; | |
111 | ||
112 | ifreq = (struct ifreq *)((caddr_t)ifconf.ifc_req + n); | |
8f90d89b | 113 | ifp = if_get_by_name(ifreq->ifr_name, VRF_DEFAULT); |
d62a17ae | 114 | if_add_update(ifp); |
115 | size = ifreq->ifr_addr.sa_len; | |
116 | if (size < sizeof(ifreq->ifr_addr)) | |
117 | size = sizeof(ifreq->ifr_addr); | |
118 | size += sizeof(ifreq->ifr_name); | |
119 | n += size; | |
120 | } | |
718e3744 | 121 | #else |
d62a17ae | 122 | for (n = 0; n < ifconf.ifc_len; n += sizeof(struct ifreq)) { |
8f90d89b | 123 | ifp = if_get_by_name(ifreq->ifr_name, VRF_DEFAULT); |
d62a17ae | 124 | if_add_update(ifp); |
125 | ifreq++; | |
126 | } | |
718e3744 | 127 | #endif /* OPEN_BSD */ |
128 | ||
d62a17ae | 129 | end: |
130 | close(sock); | |
131 | XFREE(MTYPE_TMP, ifconf.ifc_buf); | |
718e3744 | 132 | |
d62a17ae | 133 | return ret; |
718e3744 | 134 | } |
135 | ||
136 | /* Get interface's index by ioctl. */ | |
d62a17ae | 137 | static int if_get_index(struct interface *ifp) |
718e3744 | 138 | { |
ff880b78 | 139 | if_set_index(ifp, if_nametoindex(ifp->name)); |
d62a17ae | 140 | return ifp->ifindex; |
718e3744 | 141 | } |
142 | ||
143 | #ifdef SIOCGIFHWADDR | |
d62a17ae | 144 | static int if_get_hwaddr(struct interface *ifp) |
718e3744 | 145 | { |
d62a17ae | 146 | int ret; |
147 | struct ifreq ifreq; | |
148 | int i; | |
149 | ||
150 | strncpy(ifreq.ifr_name, ifp->name, IFNAMSIZ); | |
151 | ifreq.ifr_addr.sa_family = AF_INET; | |
152 | ||
153 | /* Fetch Hardware address if available. */ | |
4db21619 | 154 | ret = vrf_if_ioctl(SIOCGIFHWADDR, (caddr_t)&ifreq, ifp->vrf_id); |
d62a17ae | 155 | if (ret < 0) |
156 | ifp->hw_addr_len = 0; | |
157 | else { | |
158 | memcpy(ifp->hw_addr, ifreq.ifr_hwaddr.sa_data, 6); | |
159 | ||
160 | for (i = 0; i < 6; i++) | |
161 | if (ifp->hw_addr[i] != 0) | |
162 | break; | |
163 | ||
164 | if (i == 6) | |
165 | ifp->hw_addr_len = 0; | |
166 | else | |
167 | ifp->hw_addr_len = 6; | |
168 | } | |
169 | return 0; | |
718e3744 | 170 | } |
171 | #endif /* SIOCGIFHWADDR */ | |
172 | ||
d62a17ae | 173 | static int if_getaddrs(void) |
718e3744 | 174 | { |
d62a17ae | 175 | int ret; |
176 | struct ifaddrs *ifap; | |
177 | struct ifaddrs *ifapfree; | |
178 | struct interface *ifp; | |
179 | int prefixlen; | |
180 | ||
181 | ret = getifaddrs(&ifap); | |
182 | if (ret != 0) { | |
450971aa | 183 | flog_err_sys(EC_LIB_SYSTEM_CALL, "getifaddrs(): %s", |
09c866e3 | 184 | safe_strerror(errno)); |
d62a17ae | 185 | return -1; |
718e3744 | 186 | } |
187 | ||
d62a17ae | 188 | for (ifapfree = ifap; ifap; ifap = ifap->ifa_next) { |
189 | if (ifap->ifa_addr == NULL) { | |
af4c2728 | 190 | flog_err( |
450971aa | 191 | EC_LIB_INTERFACE, |
d62a17ae | 192 | "%s: nonsensical ifaddr with NULL ifa_addr, ifname %s", |
193 | __func__, | |
194 | (ifap->ifa_name ? ifap->ifa_name : "(null)")); | |
195 | continue; | |
196 | } | |
197 | ||
198 | ifp = if_lookup_by_name(ifap->ifa_name, VRF_DEFAULT); | |
199 | if (ifp == NULL) { | |
450971aa | 200 | flog_err(EC_LIB_INTERFACE, |
1c50c1c0 QY |
201 | "if_getaddrs(): Can't lookup interface %s\n", |
202 | ifap->ifa_name); | |
d62a17ae | 203 | continue; |
204 | } | |
205 | ||
206 | if (ifap->ifa_addr->sa_family == AF_INET) { | |
207 | struct sockaddr_in *addr; | |
208 | struct sockaddr_in *mask; | |
209 | struct sockaddr_in *dest; | |
210 | struct in_addr *dest_pnt; | |
211 | int flags = 0; | |
212 | ||
213 | addr = (struct sockaddr_in *)ifap->ifa_addr; | |
214 | mask = (struct sockaddr_in *)ifap->ifa_netmask; | |
215 | prefixlen = ip_masklen(mask->sin_addr); | |
216 | ||
217 | dest_pnt = NULL; | |
218 | ||
608105a7 | 219 | if (if_is_pointopoint(ifp) && ifap->ifa_dstaddr |
d62a17ae | 220 | && !IPV4_ADDR_SAME(&addr->sin_addr, |
221 | &((struct sockaddr_in *) | |
222 | ifap->ifa_dstaddr) | |
223 | ->sin_addr)) { | |
224 | dest = (struct sockaddr_in *)ifap->ifa_dstaddr; | |
225 | dest_pnt = &dest->sin_addr; | |
226 | flags = ZEBRA_IFA_PEER; | |
227 | } else if (ifap->ifa_broadaddr | |
228 | && !IPV4_ADDR_SAME( | |
229 | &addr->sin_addr, | |
230 | &((struct sockaddr_in *) | |
231 | ifap->ifa_broadaddr) | |
232 | ->sin_addr)) { | |
233 | dest = (struct sockaddr_in *) | |
234 | ifap->ifa_broadaddr; | |
235 | dest_pnt = &dest->sin_addr; | |
236 | } | |
237 | ||
238 | connected_add_ipv4(ifp, flags, &addr->sin_addr, | |
239 | prefixlen, dest_pnt, NULL); | |
240 | } | |
241 | if (ifap->ifa_addr->sa_family == AF_INET6) { | |
242 | struct sockaddr_in6 *addr; | |
243 | struct sockaddr_in6 *mask; | |
d62a17ae | 244 | int flags = 0; |
245 | ||
246 | addr = (struct sockaddr_in6 *)ifap->ifa_addr; | |
247 | mask = (struct sockaddr_in6 *)ifap->ifa_netmask; | |
248 | prefixlen = ip6_masklen(mask->sin6_addr); | |
249 | ||
ab836aab | 250 | #if defined(KAME) |
d62a17ae | 251 | if (IN6_IS_ADDR_LINKLOCAL(&addr->sin6_addr)) { |
252 | addr->sin6_scope_id = | |
d7c0a89a | 253 | ntohs(*(uint16_t *)&addr->sin6_addr |
d62a17ae | 254 | .s6_addr[2]); |
255 | addr->sin6_addr.s6_addr[2] = | |
256 | addr->sin6_addr.s6_addr[3] = 0; | |
257 | } | |
258 | #endif | |
259 | ||
60c0687a | 260 | connected_add_ipv6(ifp, flags, &addr->sin6_addr, NULL, |
608105a7 | 261 | prefixlen, NULL); |
d62a17ae | 262 | } |
718e3744 | 263 | } |
718e3744 | 264 | |
d62a17ae | 265 | freeifaddrs(ifapfree); |
718e3744 | 266 | |
d62a17ae | 267 | return 0; |
718e3744 | 268 | } |
718e3744 | 269 | |
270 | /* Fetch interface information via ioctl(). */ | |
d62a17ae | 271 | static void interface_info_ioctl() |
718e3744 | 272 | { |
f4e14fdb | 273 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
d62a17ae | 274 | struct interface *ifp; |
275 | ||
451fda4f | 276 | FOR_ALL_INTERFACES (vrf, ifp) { |
d62a17ae | 277 | if_get_index(ifp); |
718e3744 | 278 | #ifdef SIOCGIFHWADDR |
d62a17ae | 279 | if_get_hwaddr(ifp); |
718e3744 | 280 | #endif /* SIOCGIFHWADDR */ |
d62a17ae | 281 | if_get_flags(ifp); |
282 | if_get_mtu(ifp); | |
283 | if_get_metric(ifp); | |
284 | } | |
718e3744 | 285 | } |
286 | ||
287 | /* Lookup all interface information. */ | |
d62a17ae | 288 | void interface_list(struct zebra_ns *zns) |
718e3744 | 289 | { |
12f6fb97 | 290 | |
d62a17ae | 291 | zlog_info("interface_list: NS %u", zns->ns_id); |
12f6fb97 | 292 | |
d62a17ae | 293 | /* Linux can do both proc & ioctl, ioctl is the only way to get |
294 | interface aliases in 2.2 series kernels. */ | |
718e3744 | 295 | #ifdef HAVE_PROC_NET_DEV |
d62a17ae | 296 | interface_list_proc(); |
718e3744 | 297 | #endif /* HAVE_PROC_NET_DEV */ |
d62a17ae | 298 | interface_list_ioctl(); |
718e3744 | 299 | |
d62a17ae | 300 | /* After listing is done, get index, address, flags and other |
301 | interface's information. */ | |
302 | interface_info_ioctl(); | |
718e3744 | 303 | |
d62a17ae | 304 | if_getaddrs(); |
718e3744 | 305 | |
56c1f7d8 | 306 | #if defined(HAVE_PROC_NET_IF_INET6) |
d62a17ae | 307 | /* Linux provides interface's IPv6 address via |
308 | /proc/net/if_inet6. */ | |
309 | ifaddr_proc_ipv6(); | |
56c1f7d8 | 310 | #endif /* HAVE_PROC_NET_IF_INET6 */ |
718e3744 | 311 | } |
ddfeb486 DL |
312 | |
313 | #endif /* OPEN_BSD */ |