File: | src/usr.sbin/ldpd/address.c |
Warning: | line 72, column 10 Although the value stored to 'if_addr' is used in the enclosing expression, the value is never actually read from 'if_addr' |
Press '?' to see keyboard shortcuts
Keyboard shortcuts:
1 | /* $OpenBSD: address.c,v 1.35 2017/03/04 00:21:48 renato Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 2009 Michele Marchetto <michele@openbsd.org> |
5 | * |
6 | * Permission to use, copy, modify, and distribute this software for any |
7 | * purpose with or without fee is hereby granted, provided that the above |
8 | * copyright notice and this permission notice appear in all copies. |
9 | * |
10 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
11 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
12 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
13 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
14 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
15 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
16 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
17 | */ |
18 | |
19 | #include <sys/types.h> |
20 | #include <arpa/inet.h> |
21 | #include <stdlib.h> |
22 | #include <string.h> |
23 | |
24 | #include "ldpd.h" |
25 | #include "ldpe.h" |
26 | #include "lde.h" |
27 | #include "log.h" |
28 | |
29 | static void send_address(struct nbr *, int, struct if_addr_head *, |
30 | unsigned int, int); |
31 | static int gen_address_list_tlv(struct ibuf *, int, struct if_addr_head *, |
32 | unsigned int); |
33 | static int gen_mac_list_tlv(struct ibuf *, uint8_t *); |
34 | static void address_list_add(struct if_addr_head *, struct if_addr *); |
35 | static void address_list_clr(struct if_addr_head *); |
36 | static void log_msg_address(int, uint16_t, struct nbr *, int, |
37 | union ldpd_addr *); |
38 | static void log_msg_mac_withdrawal(int, struct nbr *, uint8_t *); |
39 | |
40 | static void |
41 | send_address(struct nbr *nbr, int af, struct if_addr_head *addr_list, |
42 | unsigned int addr_count, int withdraw) |
43 | { |
44 | struct ibuf *buf; |
45 | uint16_t msg_type; |
46 | uint8_t addr_size; |
47 | struct if_addr *if_addr; |
48 | uint16_t size; |
49 | unsigned int tlv_addr_count = 0; |
50 | int err = 0; |
51 | |
52 | /* nothing to send */ |
53 | if (LIST_EMPTY(addr_list)(((addr_list)->lh_first) == ((void *)0))) |
54 | return; |
55 | |
56 | if (!withdraw) |
57 | msg_type = MSG_TYPE_ADDR0x0300; |
58 | else |
59 | msg_type = MSG_TYPE_ADDRWITHDRAW0x0301; |
60 | |
61 | switch (af) { |
62 | case AF_INET2: |
63 | addr_size = sizeof(struct in_addr); |
64 | break; |
65 | case AF_INET624: |
66 | addr_size = sizeof(struct in6_addr); |
67 | break; |
68 | default: |
69 | fatalx("send_address: unknown af"); |
70 | } |
71 | |
72 | while ((if_addr = LIST_FIRST(addr_list)((addr_list)->lh_first)) != NULL((void *)0)) { |
Although the value stored to 'if_addr' is used in the enclosing expression, the value is never actually read from 'if_addr' | |
73 | /* |
74 | * Send as many addresses as possible - respect the session's |
75 | * negotiated maximum pdu length. |
76 | */ |
77 | size = LDP_HDR_SIZE10 + LDP_MSG_SIZE8 + ADDR_LIST_SIZE6; |
78 | if (size + addr_count * addr_size <= nbr->max_pdu_len) |
79 | tlv_addr_count = addr_count; |
80 | else |
81 | tlv_addr_count = (nbr->max_pdu_len - size) / addr_size; |
82 | size += tlv_addr_count * addr_size; |
83 | addr_count -= tlv_addr_count; |
84 | |
85 | if ((buf = ibuf_open(size)) == NULL((void *)0)) |
86 | fatal(__func__); |
87 | |
88 | err |= gen_ldp_hdr(buf, size); |
89 | size -= LDP_HDR_SIZE10; |
90 | err |= gen_msg_hdr(buf, msg_type, size); |
91 | size -= LDP_MSG_SIZE8; |
92 | err |= gen_address_list_tlv(buf, af, addr_list, tlv_addr_count); |
93 | if (err) { |
94 | address_list_clr(addr_list); |
95 | ibuf_free(buf); |
96 | return; |
97 | } |
98 | |
99 | while ((if_addr = LIST_FIRST(addr_list)((addr_list)->lh_first)) != NULL((void *)0)) { |
100 | log_msg_address(1, msg_type, nbr, af, &if_addr->addr); |
101 | |
102 | LIST_REMOVE(if_addr, entry)do { if ((if_addr)->entry.le_next != ((void *)0)) (if_addr )->entry.le_next->entry.le_prev = (if_addr)->entry.le_prev ; *(if_addr)->entry.le_prev = (if_addr)->entry.le_next; ; ; } while (0); |
103 | free(if_addr); |
104 | if (--tlv_addr_count == 0) |
105 | break; |
106 | } |
107 | |
108 | evbuf_enqueue(&nbr->tcp->wbuf, buf); |
109 | } |
110 | |
111 | nbr_fsm(nbr, NBR_EVT_PDU_SENT); |
112 | } |
113 | |
114 | void |
115 | send_address_single(struct nbr *nbr, struct if_addr *if_addr, int withdraw) |
116 | { |
117 | struct if_addr_head addr_list; |
118 | |
119 | LIST_INIT(&addr_list)do { ((&addr_list)->lh_first) = ((void *)0); } while ( 0); |
120 | address_list_add(&addr_list, if_addr); |
121 | send_address(nbr, if_addr->af, &addr_list, 1, withdraw); |
122 | } |
123 | |
124 | void |
125 | send_address_all(struct nbr *nbr, int af) |
126 | { |
127 | struct if_addr_head addr_list; |
128 | struct if_addr *if_addr; |
129 | unsigned int addr_count = 0; |
130 | |
131 | LIST_INIT(&addr_list)do { ((&addr_list)->lh_first) = ((void *)0); } while ( 0); |
132 | LIST_FOREACH(if_addr, &global.addr_list, entry)for((if_addr) = ((&global.addr_list)->lh_first); (if_addr )!= ((void *)0); (if_addr) = ((if_addr)->entry.le_next)) { |
133 | if (if_addr->af != af) |
134 | continue; |
135 | |
136 | address_list_add(&addr_list, if_addr); |
137 | addr_count++; |
138 | } |
139 | |
140 | send_address(nbr, af, &addr_list, addr_count, 0); |
141 | } |
142 | |
143 | void |
144 | send_mac_withdrawal(struct nbr *nbr, struct map *fec, uint8_t *mac) |
145 | { |
146 | struct ibuf *buf; |
147 | uint16_t size; |
148 | int err; |
149 | |
150 | size = LDP_HDR_SIZE10 + LDP_MSG_SIZE8 + ADDR_LIST_SIZE6 + len_fec_tlv(fec) + |
151 | TLV_HDR_SIZE4; |
152 | if (mac) |
153 | size += ETHER_ADDR_LEN6; |
154 | |
155 | if ((buf = ibuf_open(size)) == NULL((void *)0)) |
156 | fatal(__func__); |
157 | |
158 | err = gen_ldp_hdr(buf, size); |
159 | size -= LDP_HDR_SIZE10; |
160 | err |= gen_msg_hdr(buf, MSG_TYPE_ADDRWITHDRAW0x0301, size); |
161 | size -= LDP_MSG_SIZE8; |
162 | err |= gen_address_list_tlv(buf, AF_INET2, NULL((void *)0), 0); |
163 | err |= gen_fec_tlv(buf, fec); |
164 | err |= gen_mac_list_tlv(buf, mac); |
165 | if (err) { |
166 | ibuf_free(buf); |
167 | return; |
168 | } |
169 | |
170 | log_msg_mac_withdrawal(1, nbr, mac); |
171 | |
172 | evbuf_enqueue(&nbr->tcp->wbuf, buf); |
173 | |
174 | nbr_fsm(nbr, NBR_EVT_PDU_SENT); |
175 | } |
176 | |
177 | int |
178 | recv_address(struct nbr *nbr, char *buf, uint16_t len) |
179 | { |
180 | struct ldp_msg msg; |
181 | uint16_t msg_type; |
182 | enum imsg_type type; |
183 | struct address_list_tlv alt; |
184 | uint16_t alt_len; |
185 | uint16_t alt_family; |
186 | struct lde_addr lde_addr; |
187 | |
188 | memcpy(&msg, buf, sizeof(msg)); |
189 | msg_type = ntohs(msg.type)(__uint16_t)(__builtin_constant_p(msg.type) ? (__uint16_t)((( __uint16_t)(msg.type) & 0xffU) << 8 | ((__uint16_t) (msg.type) & 0xff00U) >> 8) : __swap16md(msg.type)); |
190 | switch (msg_type) { |
191 | case MSG_TYPE_ADDR0x0300: |
192 | type = IMSG_ADDRESS_ADD; |
193 | break; |
194 | case MSG_TYPE_ADDRWITHDRAW0x0301: |
195 | type = IMSG_ADDRESS_DEL; |
196 | break; |
197 | default: |
198 | fatalx("recv_address: unexpected msg type"); |
199 | } |
200 | buf += LDP_MSG_SIZE8; |
201 | len -= LDP_MSG_SIZE8; |
202 | |
203 | /* Address List TLV */ |
204 | if (len < ADDR_LIST_SIZE6) { |
205 | session_shutdown(nbr, S_BAD_MSG_LEN0x80000005, msg.id, msg.type); |
206 | return (-1); |
207 | } |
208 | memcpy(&alt, buf, sizeof(alt)); |
209 | alt_len = ntohs(alt.length)(__uint16_t)(__builtin_constant_p(alt.length) ? (__uint16_t)( ((__uint16_t)(alt.length) & 0xffU) << 8 | ((__uint16_t )(alt.length) & 0xff00U) >> 8) : __swap16md(alt.length )); |
210 | alt_family = ntohs(alt.family)(__uint16_t)(__builtin_constant_p(alt.family) ? (__uint16_t)( ((__uint16_t)(alt.family) & 0xffU) << 8 | ((__uint16_t )(alt.family) & 0xff00U) >> 8) : __swap16md(alt.family )); |
211 | if (alt_len > len - TLV_HDR_SIZE4) { |
212 | session_shutdown(nbr, S_BAD_TLV_LEN0x80000007, msg.id, msg.type); |
213 | return (-1); |
214 | } |
215 | if (ntohs(alt.type)(__uint16_t)(__builtin_constant_p(alt.type) ? (__uint16_t)((( __uint16_t)(alt.type) & 0xffU) << 8 | ((__uint16_t) (alt.type) & 0xff00U) >> 8) : __swap16md(alt.type)) != TLV_TYPE_ADDRLIST0x0101) { |
216 | send_notification(nbr->tcp, S_MISS_MSG0x00000016, msg.id, msg.type); |
217 | return (-1); |
218 | } |
219 | switch (alt_family) { |
220 | case AF_IPV40x1: |
221 | if (!nbr->v4_enabled) |
222 | /* just ignore the message */ |
223 | return (0); |
224 | break; |
225 | case AF_IPV60x2: |
226 | if (!nbr->v6_enabled) |
227 | /* just ignore the message */ |
228 | return (0); |
229 | break; |
230 | default: |
231 | send_notification(nbr->tcp, S_UNSUP_ADDR0x00000017, msg.id, msg.type); |
232 | return (-1); |
233 | } |
234 | alt_len -= sizeof(alt.family); |
235 | buf += sizeof(alt); |
236 | len -= sizeof(alt); |
237 | |
238 | /* Process all received addresses */ |
239 | while (alt_len > 0) { |
240 | switch (alt_family) { |
241 | case AF_IPV40x1: |
242 | if (alt_len < sizeof(struct in_addr)) { |
243 | session_shutdown(nbr, S_BAD_TLV_LEN0x80000007, msg.id, |
244 | msg.type); |
245 | return (-1); |
246 | } |
247 | |
248 | memset(&lde_addr, 0, sizeof(lde_addr)); |
249 | lde_addr.af = AF_INET2; |
250 | memcpy(&lde_addr.addr, buf, sizeof(struct in_addr)); |
251 | |
252 | buf += sizeof(struct in_addr); |
253 | len -= sizeof(struct in_addr); |
254 | alt_len -= sizeof(struct in_addr); |
255 | break; |
256 | case AF_IPV60x2: |
257 | if (alt_len < sizeof(struct in6_addr)) { |
258 | session_shutdown(nbr, S_BAD_TLV_LEN0x80000007, msg.id, |
259 | msg.type); |
260 | return (-1); |
261 | } |
262 | |
263 | memset(&lde_addr, 0, sizeof(lde_addr)); |
264 | lde_addr.af = AF_INET624; |
265 | memcpy(&lde_addr.addr, buf, sizeof(struct in6_addr)); |
266 | |
267 | buf += sizeof(struct in6_addr); |
268 | len -= sizeof(struct in6_addr); |
269 | alt_len -= sizeof(struct in6_addr); |
270 | break; |
271 | default: |
272 | fatalx("recv_address: unknown af"); |
273 | } |
274 | |
275 | log_msg_address(0, msg_type, nbr, lde_addr.af, &lde_addr.addr); |
276 | |
277 | ldpe_imsg_compose_lde(type, nbr->peerid, 0, &lde_addr, |
278 | sizeof(lde_addr)); |
279 | } |
280 | |
281 | /* Optional Parameters */ |
282 | while (len > 0) { |
283 | struct tlv tlv; |
284 | uint16_t tlv_type; |
285 | uint16_t tlv_len; |
286 | |
287 | if (len < sizeof(tlv)) { |
288 | session_shutdown(nbr, S_BAD_TLV_LEN0x80000007, msg.id, msg.type); |
289 | return (-1); |
290 | } |
291 | |
292 | memcpy(&tlv, buf, TLV_HDR_SIZE4); |
293 | tlv_type = ntohs(tlv.type)(__uint16_t)(__builtin_constant_p(tlv.type) ? (__uint16_t)((( __uint16_t)(tlv.type) & 0xffU) << 8 | ((__uint16_t) (tlv.type) & 0xff00U) >> 8) : __swap16md(tlv.type)); |
294 | tlv_len = ntohs(tlv.length)(__uint16_t)(__builtin_constant_p(tlv.length) ? (__uint16_t)( ((__uint16_t)(tlv.length) & 0xffU) << 8 | ((__uint16_t )(tlv.length) & 0xff00U) >> 8) : __swap16md(tlv.length )); |
295 | if (tlv_len + TLV_HDR_SIZE4 > len) { |
296 | session_shutdown(nbr, S_BAD_TLV_LEN0x80000007, msg.id, msg.type); |
297 | return (-1); |
298 | } |
299 | buf += TLV_HDR_SIZE4; |
300 | len -= TLV_HDR_SIZE4; |
301 | |
302 | switch (tlv_type) { |
303 | default: |
304 | if (!(ntohs(tlv.type)(__uint16_t)(__builtin_constant_p(tlv.type) ? (__uint16_t)((( __uint16_t)(tlv.type) & 0xffU) << 8 | ((__uint16_t) (tlv.type) & 0xff00U) >> 8) : __swap16md(tlv.type)) & UNKNOWN_FLAG0x8000)) |
305 | send_notification_rtlvs(nbr, S_UNKNOWN_TLV0x00000006, |
306 | msg.id, msg.type, tlv_type, tlv_len, buf); |
307 | /* ignore unknown tlv */ |
308 | break; |
309 | } |
310 | buf += tlv_len; |
311 | len -= tlv_len; |
312 | } |
313 | |
314 | return (0); |
315 | } |
316 | |
317 | static int |
318 | gen_address_list_tlv(struct ibuf *buf, int af, struct if_addr_head *addr_list, |
319 | unsigned int tlv_addr_count) |
320 | { |
321 | struct address_list_tlv alt; |
322 | uint16_t addr_size; |
323 | struct if_addr *if_addr; |
324 | int err = 0; |
325 | |
326 | memset(&alt, 0, sizeof(alt)); |
327 | alt.type = htons(TLV_TYPE_ADDRLIST)(__uint16_t)(__builtin_constant_p(0x0101) ? (__uint16_t)(((__uint16_t )(0x0101) & 0xffU) << 8 | ((__uint16_t)(0x0101) & 0xff00U) >> 8) : __swap16md(0x0101)); |
328 | |
329 | switch (af) { |
330 | case AF_INET2: |
331 | alt.family = htons(AF_IPV4)(__uint16_t)(__builtin_constant_p(0x1) ? (__uint16_t)(((__uint16_t )(0x1) & 0xffU) << 8 | ((__uint16_t)(0x1) & 0xff00U ) >> 8) : __swap16md(0x1)); |
332 | addr_size = sizeof(struct in_addr); |
333 | break; |
334 | case AF_INET624: |
335 | alt.family = htons(AF_IPV6)(__uint16_t)(__builtin_constant_p(0x2) ? (__uint16_t)(((__uint16_t )(0x2) & 0xffU) << 8 | ((__uint16_t)(0x2) & 0xff00U ) >> 8) : __swap16md(0x2)); |
336 | addr_size = sizeof(struct in6_addr); |
337 | break; |
338 | default: |
339 | fatalx("gen_address_list_tlv: unknown af"); |
340 | } |
341 | alt.length = htons(sizeof(alt.family) + addr_size * tlv_addr_count)(__uint16_t)(__builtin_constant_p(sizeof(alt.family) + addr_size * tlv_addr_count) ? (__uint16_t)(((__uint16_t)(sizeof(alt.family ) + addr_size * tlv_addr_count) & 0xffU) << 8 | ((__uint16_t )(sizeof(alt.family) + addr_size * tlv_addr_count) & 0xff00U ) >> 8) : __swap16md(sizeof(alt.family) + addr_size * tlv_addr_count )); |
342 | |
343 | err |= ibuf_add(buf, &alt, sizeof(alt)); |
344 | if (addr_list == NULL((void *)0)) |
345 | return (err); |
346 | |
347 | LIST_FOREACH(if_addr, addr_list, entry)for((if_addr) = ((addr_list)->lh_first); (if_addr)!= ((void *)0); (if_addr) = ((if_addr)->entry.le_next)) { |
348 | err |= ibuf_add(buf, &if_addr->addr, addr_size); |
349 | if (--tlv_addr_count == 0) |
350 | break; |
351 | } |
352 | |
353 | return (err); |
354 | } |
355 | |
356 | static int |
357 | gen_mac_list_tlv(struct ibuf *buf, uint8_t *mac) |
358 | { |
359 | struct tlv tlv; |
360 | int err; |
361 | |
362 | memset(&tlv, 0, sizeof(tlv)); |
363 | tlv.type = htons(TLV_TYPE_MAC_LIST)(__uint16_t)(__builtin_constant_p(0x8404) ? (__uint16_t)(((__uint16_t )(0x8404) & 0xffU) << 8 | ((__uint16_t)(0x8404) & 0xff00U) >> 8) : __swap16md(0x8404)); |
364 | if (mac) |
365 | tlv.length = htons(ETHER_ADDR_LEN)(__uint16_t)(__builtin_constant_p(6) ? (__uint16_t)(((__uint16_t )(6) & 0xffU) << 8 | ((__uint16_t)(6) & 0xff00U ) >> 8) : __swap16md(6)); |
366 | err = ibuf_add(buf, &tlv, sizeof(tlv)); |
367 | if (mac) |
368 | err |= ibuf_add(buf, mac, ETHER_ADDR_LEN6); |
369 | |
370 | return (err); |
371 | } |
372 | |
373 | static void |
374 | address_list_add(struct if_addr_head *addr_list, struct if_addr *if_addr) |
375 | { |
376 | struct if_addr *new; |
377 | |
378 | new = malloc(sizeof(*new)); |
379 | if (new == NULL((void *)0)) |
380 | fatal(__func__); |
381 | *new = *if_addr; |
382 | |
383 | LIST_INSERT_HEAD(addr_list, new, entry)do { if (((new)->entry.le_next = (addr_list)->lh_first) != ((void *)0)) (addr_list)->lh_first->entry.le_prev = &(new)->entry.le_next; (addr_list)->lh_first = (new ); (new)->entry.le_prev = &(addr_list)->lh_first; } while (0); |
384 | } |
385 | |
386 | static void |
387 | address_list_clr(struct if_addr_head *addr_list) |
388 | { |
389 | struct if_addr *if_addr; |
390 | |
391 | while ((if_addr = LIST_FIRST(addr_list)((addr_list)->lh_first)) != NULL((void *)0)) { |
392 | LIST_REMOVE(if_addr, entry)do { if ((if_addr)->entry.le_next != ((void *)0)) (if_addr )->entry.le_next->entry.le_prev = (if_addr)->entry.le_prev ; *(if_addr)->entry.le_prev = (if_addr)->entry.le_next; ; ; } while (0); |
393 | free(if_addr); |
394 | } |
395 | } |
396 | |
397 | static void |
398 | log_msg_address(int out, uint16_t msg_type, struct nbr *nbr, int af, |
399 | union ldpd_addr *addr) |
400 | { |
401 | log_debug("msg-%s: %s: lsr-id %s, address %s", (out) ? "out" : "in", |
402 | msg_name(msg_type), inet_ntoa(nbr->id), log_addr(af, addr)); |
403 | } |
404 | |
405 | static void |
406 | log_msg_mac_withdrawal(int out, struct nbr *nbr, uint8_t *mac) |
407 | { |
408 | log_debug("msg-%s: mac withdrawal: lsr-id %s, mac %s", |
409 | (out) ? "out" : "in", inet_ntoa(nbr->id), |
410 | (mac) ? ether_ntoa((struct ether_addr *)mac) : "wildcard"); |
411 | } |