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1 | /* | |
2 | * Interface looking up by ioctl () on Solaris. | |
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 | * | |
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 | |
20 | */ | |
21 | ||
22 | #include <zebra.h> | |
23 | ||
24 | #ifdef SUNOS_5 | |
25 | ||
26 | #include "if.h" | |
27 | #include "sockunion.h" | |
28 | #include "prefix.h" | |
29 | #include "ioctl.h" | |
30 | #include "connected.h" | |
31 | #include "memory.h" | |
32 | #include "zebra_memory.h" | |
33 | #include "log.h" | |
34 | #include "privs.h" | |
35 | #include "vrf.h" | |
36 | #include "vty.h" | |
37 | #include "lib_errors.h" | |
38 | ||
39 | #include "zebra/interface.h" | |
40 | #include "zebra/ioctl_solaris.h" | |
41 | #include "zebra/rib.h" | |
42 | #include "zebra/rt.h" | |
43 | #include "zebra/zebra_errors.h" | |
44 | ||
45 | static int if_get_addr(struct interface *, struct sockaddr *, const char *); | |
46 | static void interface_info_ioctl(struct interface *); | |
47 | extern struct zebra_privs_t zserv_privs; | |
48 | ||
49 | static int interface_list_ioctl(int af) | |
50 | { | |
51 | int ret; | |
52 | int sock; | |
53 | #define IFNUM_BASE 32 | |
54 | struct lifnum lifn; | |
55 | int ifnum; | |
56 | struct lifreq *lifreq; | |
57 | struct lifconf lifconf; | |
58 | struct interface *ifp; | |
59 | int n; | |
60 | size_t needed, lastneeded = 0; | |
61 | char *buf = NULL; | |
62 | ||
63 | frr_elevate_privs(&zserv_privs) { | |
64 | sock = socket(af, SOCK_DGRAM, 0); | |
65 | } | |
66 | ||
67 | if (sock < 0) { | |
68 | flog_err_sys(EC_LIB_SOCKET, "Can't make %s socket stream: %s", | |
69 | (af == AF_INET ? "AF_INET" : "AF_INET6"), | |
70 | safe_strerror(errno)); | |
71 | return -1; | |
72 | } | |
73 | ||
74 | calculate_lifc_len: | |
75 | frr_elevate_privs(&zserv_privs) { | |
76 | lifn.lifn_family = af; | |
77 | lifn.lifn_flags = LIFC_NOXMIT; | |
78 | /* we want NOXMIT interfaces too */ | |
79 | ret = ioctl(sock, SIOCGLIFNUM, &lifn); | |
80 | } | |
81 | ||
82 | if (ret < 0) { | |
83 | flog_err_sys(EC_LIB_SYSTEM_CALL, | |
84 | "interface_list_ioctl: SIOCGLIFNUM failed %s", | |
85 | safe_strerror(errno)); | |
86 | close(sock); | |
87 | return -1; | |
88 | } | |
89 | ifnum = lifn.lifn_count; | |
90 | ||
91 | /* | |
92 | * When calculating the buffer size needed, add a small number | |
93 | * of interfaces to those we counted. We do this to capture | |
94 | * the interface status of potential interfaces which may have | |
95 | * been plumbed between the SIOCGLIFNUM and the SIOCGLIFCONF. | |
96 | */ | |
97 | needed = (ifnum + 4) * sizeof(struct lifreq); | |
98 | if (needed > lastneeded || needed < lastneeded / 2) { | |
99 | if (buf != NULL) | |
100 | XFREE(MTYPE_TMP, buf); | |
101 | buf = XMALLOC(MTYPE_TMP, needed); | |
102 | } | |
103 | lastneeded = needed; | |
104 | ||
105 | lifconf.lifc_family = af; | |
106 | lifconf.lifc_flags = LIFC_NOXMIT; | |
107 | lifconf.lifc_len = needed; | |
108 | lifconf.lifc_buf = buf; | |
109 | ||
110 | frr_elevate_privs(&zserv_privs) { | |
111 | ret = ioctl(sock, SIOCGLIFCONF, &lifconf); | |
112 | } | |
113 | ||
114 | if (ret < 0) { | |
115 | if (errno == EINVAL) | |
116 | goto calculate_lifc_len; | |
117 | ||
118 | flog_err_sys(EC_LIB_SYSTEM_CALL, "SIOCGLIFCONF: %s", | |
119 | safe_strerror(errno)); | |
120 | goto end; | |
121 | } | |
122 | ||
123 | /* Allocate interface. */ | |
124 | lifreq = lifconf.lifc_req; | |
125 | ||
126 | for (n = 0; n < lifconf.lifc_len; n += sizeof(struct lifreq)) { | |
127 | /* we treat Solaris logical interfaces as addresses, because | |
128 | * that is | |
129 | * how PF_ROUTE on Solaris treats them. Hence we can not | |
130 | * directly use | |
131 | * the lifreq_name to get the ifp. We need to normalise the | |
132 | * name | |
133 | * before attempting get. | |
134 | * | |
135 | * Solaris logical interface names are in the form of: | |
136 | * <interface name>:<logical interface id> | |
137 | */ | |
138 | unsigned int normallen = 0; | |
139 | uint64_t lifflags; | |
140 | ||
141 | /* We should exclude ~IFF_UP interfaces, as we'll find out about | |
142 | * them | |
143 | * coming up later through RTM_NEWADDR message on the route | |
144 | * socket. | |
145 | */ | |
146 | if (if_get_flags_direct(lifreq->lifr_name, &lifflags, | |
147 | lifreq->lifr_addr.ss_family) | |
148 | || !CHECK_FLAG(lifflags, IFF_UP)) { | |
149 | lifreq++; | |
150 | continue; | |
151 | } | |
152 | ||
153 | /* Find the normalised name */ | |
154 | while ((normallen < sizeof(lifreq->lifr_name)) | |
155 | && (*(lifreq->lifr_name + normallen) != '\0') | |
156 | && (*(lifreq->lifr_name + normallen) != ':')) | |
157 | normallen++; | |
158 | ||
159 | ifp = if_get_by_name(lifreq->lifr_name, VRF_DEFAULT); | |
160 | ||
161 | if (lifreq->lifr_addr.ss_family == AF_INET) | |
162 | ifp->flags |= IFF_IPV4; | |
163 | ||
164 | if (lifreq->lifr_addr.ss_family == AF_INET6) { | |
165 | ifp->flags |= IFF_IPV6; | |
166 | } | |
167 | ||
168 | if_add_update(ifp); | |
169 | ||
170 | interface_info_ioctl(ifp); | |
171 | ||
172 | /* If a logical interface pass the full name so it can be | |
173 | * as a label on the address | |
174 | */ | |
175 | if (*(lifreq->lifr_name + normallen) != '\0') | |
176 | if_get_addr(ifp, (struct sockaddr *)&lifreq->lifr_addr, | |
177 | lifreq->lifr_name); | |
178 | else | |
179 | if_get_addr(ifp, (struct sockaddr *)&lifreq->lifr_addr, | |
180 | NULL); | |
181 | ||
182 | /* Poke the interface flags. Lets IFF_UP mangling kick in */ | |
183 | if_flags_update(ifp, ifp->flags); | |
184 | ||
185 | lifreq++; | |
186 | } | |
187 | ||
188 | end: | |
189 | close(sock); | |
190 | XFREE(MTYPE_TMP, lifconf.lifc_buf); | |
191 | return ret; | |
192 | } | |
193 | ||
194 | /* Get interface's index by ioctl. */ | |
195 | static int if_get_index(struct interface *ifp) | |
196 | { | |
197 | int ret; | |
198 | struct lifreq lifreq; | |
199 | ||
200 | lifreq_set_name(&lifreq, ifp->name); | |
201 | ||
202 | if (ifp->flags & IFF_IPV4) | |
203 | ret = AF_IOCTL(AF_INET, SIOCGLIFINDEX, (caddr_t)&lifreq); | |
204 | else if (ifp->flags & IFF_IPV6) | |
205 | ret = AF_IOCTL(AF_INET6, SIOCGLIFINDEX, (caddr_t)&lifreq); | |
206 | else | |
207 | ret = -1; | |
208 | ||
209 | if (ret < 0) { | |
210 | flog_err_sys(EC_LIB_SYSTEM_CALL, "SIOCGLIFINDEX(%s) failed", | |
211 | ifp->name); | |
212 | return ret; | |
213 | } | |
214 | ||
215 | /* OK we got interface index. */ | |
216 | #ifdef ifr_ifindex | |
217 | if_set_index(ifp, lifreq.lifr_ifindex); | |
218 | #else | |
219 | if_set_index(ifp, lifreq.lifr_index); | |
220 | #endif | |
221 | return ifp->ifindex; | |
222 | } | |
223 | ||
224 | ||
225 | /* Interface address lookup by ioctl. This function only looks up | |
226 | IPv4 address. */ | |
227 | #define ADDRLEN(sa) \ | |
228 | (((sa)->sa_family == AF_INET ? sizeof(struct sockaddr_in) \ | |
229 | : sizeof(struct sockaddr_in6))) | |
230 | ||
231 | #define SIN(s) ((struct sockaddr_in *)(s)) | |
232 | #define SIN6(s) ((struct sockaddr_in6 *)(s)) | |
233 | ||
234 | /* Retrieve address information for the given ifp */ | |
235 | static int if_get_addr(struct interface *ifp, struct sockaddr *addr, | |
236 | const char *label) | |
237 | { | |
238 | int ret; | |
239 | struct lifreq lifreq; | |
240 | struct sockaddr_storage mask, dest; | |
241 | char *dest_pnt = NULL; | |
242 | uint8_t prefixlen = 0; | |
243 | afi_t af; | |
244 | int flags = 0; | |
245 | ||
246 | /* Interface's name and address family. | |
247 | * We need to use the logical interface name / label, if we've been | |
248 | * given one, in order to get the right address | |
249 | */ | |
250 | strncpy(lifreq.lifr_name, (label ? label : ifp->name), IFNAMSIZ); | |
251 | ||
252 | /* Interface's address. */ | |
253 | memcpy(&lifreq.lifr_addr, addr, ADDRLEN(addr)); | |
254 | af = addr->sa_family; | |
255 | ||
256 | /* Point to point or broad cast address pointer init. */ | |
257 | dest_pnt = NULL; | |
258 | ||
259 | if (AF_IOCTL(af, SIOCGLIFDSTADDR, (caddr_t)&lifreq) >= 0) { | |
260 | memcpy(&dest, &lifreq.lifr_dstaddr, ADDRLEN(addr)); | |
261 | if (af == AF_INET) | |
262 | dest_pnt = (char *)&(SIN(&dest)->sin_addr); | |
263 | else | |
264 | dest_pnt = (char *)&(SIN6(&dest)->sin6_addr); | |
265 | flags = ZEBRA_IFA_PEER; | |
266 | } | |
267 | ||
268 | if (af == AF_INET) { | |
269 | ret = if_ioctl(SIOCGLIFNETMASK, (caddr_t)&lifreq); | |
270 | ||
271 | if (ret < 0) { | |
272 | if (errno != EADDRNOTAVAIL) { | |
273 | flog_err_sys(EC_LIB_SYSTEM_CALL, | |
274 | "SIOCGLIFNETMASK (%s) fail: %s", | |
275 | ifp->name, safe_strerror(errno)); | |
276 | return ret; | |
277 | } | |
278 | return 0; | |
279 | } | |
280 | memcpy(&mask, &lifreq.lifr_addr, ADDRLEN(addr)); | |
281 | ||
282 | prefixlen = ip_masklen(SIN(&mask)->sin_addr); | |
283 | if (!dest_pnt | |
284 | && (if_ioctl(SIOCGLIFBRDADDR, (caddr_t)&lifreq) >= 0)) { | |
285 | memcpy(&dest, &lifreq.lifr_broadaddr, | |
286 | sizeof(struct sockaddr_in)); | |
287 | dest_pnt = (char *)&SIN(&dest)->sin_addr; | |
288 | } | |
289 | } else if (af == AF_INET6) { | |
290 | if (if_ioctl_ipv6(SIOCGLIFSUBNET, (caddr_t)&lifreq) < 0) { | |
291 | if (ifp->flags & IFF_POINTOPOINT) | |
292 | prefixlen = IPV6_MAX_BITLEN; | |
293 | else | |
294 | flog_err_sys(EC_LIB_SYSTEM_CALL, | |
295 | "SIOCGLIFSUBNET (%s) fail: %s", | |
296 | ifp->name, safe_strerror(errno)); | |
297 | } else { | |
298 | prefixlen = lifreq.lifr_addrlen; | |
299 | } | |
300 | } | |
301 | ||
302 | /* Set address to the interface. */ | |
303 | if (af == AF_INET) | |
304 | connected_add_ipv4(ifp, flags, &SIN(addr)->sin_addr, prefixlen, | |
305 | (struct in_addr *)dest_pnt, label); | |
306 | else if (af == AF_INET6) | |
307 | connected_add_ipv6(ifp, flags, &SIN6(addr)->sin6_addr, NULL, | |
308 | prefixlen, label); | |
309 | ||
310 | return 0; | |
311 | } | |
312 | ||
313 | /* Fetch interface information via ioctl(). */ | |
314 | static void interface_info_ioctl(struct interface *ifp) | |
315 | { | |
316 | if_get_index(ifp); | |
317 | if_get_flags(ifp); | |
318 | if_get_mtu(ifp); | |
319 | if_get_metric(ifp); | |
320 | } | |
321 | ||
322 | /* Lookup all interface information. */ | |
323 | void interface_list(struct zebra_ns *zns) | |
324 | { | |
325 | if (zns->ns_id != NS_DEFAULT) { | |
326 | zlog_debug("interface_list: ignore NS %u", zns->ns_id); | |
327 | return; | |
328 | } | |
329 | interface_list_ioctl(AF_INET); | |
330 | interface_list_ioctl(AF_INET6); | |
331 | interface_list_ioctl(AF_UNSPEC); | |
332 | } | |
333 | ||
334 | struct connected *if_lookup_linklocal(struct interface *ifp) | |
335 | { | |
336 | struct listnode *node; | |
337 | struct connected *ifc; | |
338 | ||
339 | if (ifp == NULL) | |
340 | return NULL; | |
341 | ||
342 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) { | |
343 | if ((ifc->address->family == AF_INET6) | |
344 | && (IN6_IS_ADDR_LINKLOCAL(&ifc->address->u.prefix6))) | |
345 | return ifc; | |
346 | } | |
347 | ||
348 | return NULL; | |
349 | } | |
350 | ||
351 | #endif /* SUNOS_5 */ |