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Commit | Line | Data |
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0f113f3e | 1 | /* |
38fc02a7 | 2 | * Copyright 2005-2021 The OpenSSL Project Authors. All Rights Reserved. |
36d16f8e | 3 | * |
09abbca1 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
b1322259 RS |
5 | * this file except in compliance with the License. You can obtain a copy |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
36d16f8e BL |
8 | */ |
9 | ||
e8e1f6d1 DK |
10 | #ifndef _GNU_SOURCE |
11 | # define _GNU_SOURCE | |
12 | #endif | |
13 | ||
36d16f8e BL |
14 | #include <stdio.h> |
15 | #include <errno.h> | |
36d16f8e | 16 | |
5d1bb4fc | 17 | #include "internal/time.h" |
706457b7 | 18 | #include "bio_local.h" |
74e056ed | 19 | #ifndef OPENSSL_NO_DGRAM |
36d16f8e | 20 | |
0f113f3e MC |
21 | # ifndef OPENSSL_NO_SCTP |
22 | # include <netinet/sctp.h> | |
23 | # include <fcntl.h> | |
24 | # define OPENSSL_SCTP_DATA_CHUNK_TYPE 0x00 | |
25 | # define OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE 0xc0 | |
26 | # endif | |
7e159e01 | 27 | |
0f113f3e MC |
28 | # if defined(OPENSSL_SYS_LINUX) && !defined(IP_MTU) |
29 | # define IP_MTU 14 /* linux is lame */ | |
30 | # endif | |
36d16f8e | 31 | |
0f113f3e MC |
32 | # if OPENSSL_USE_IPV6 && !defined(IPPROTO_IPV6) |
33 | # define IPPROTO_IPV6 41 /* windows is lame */ | |
34 | # endif | |
5833e4f5 | 35 | |
0f113f3e | 36 | # if defined(__FreeBSD__) && defined(IN6_IS_ADDR_V4MAPPED) |
03c1d9f9 | 37 | /* Standard definition causes type-punning problems. */ |
0f113f3e MC |
38 | # undef IN6_IS_ADDR_V4MAPPED |
39 | # define s6_addr32 __u6_addr.__u6_addr32 | |
40 | # define IN6_IS_ADDR_V4MAPPED(a) \ | |
03c1d9f9 BL |
41 | (((a)->s6_addr32[0] == 0) && \ |
42 | ((a)->s6_addr32[1] == 0) && \ | |
43 | ((a)->s6_addr32[2] == htonl(0x0000ffff))) | |
0f113f3e | 44 | # endif |
03c1d9f9 | 45 | |
664e096c HL |
46 | /* Determine what method to use for BIO_sendmmsg and BIO_recvmmsg. */ |
47 | # define M_METHOD_NONE 0 | |
48 | # define M_METHOD_RECVMMSG 1 | |
49 | # define M_METHOD_RECVMSG 2 | |
50 | # define M_METHOD_RECVFROM 3 | |
51 | # define M_METHOD_WSARECVMSG 4 | |
52 | ||
53 | # if !defined(M_METHOD) | |
54 | # if defined(OPENSSL_SYS_WINDOWS) && defined(BIO_HAVE_WSAMSG) && !defined(NO_WSARECVMSG) | |
55 | # define M_METHOD M_METHOD_WSARECVMSG | |
56 | # elif !defined(OPENSSL_SYS_WINDOWS) && defined(MSG_WAITFORONE) && !defined(NO_RECVMMSG) | |
57 | # define M_METHOD M_METHOD_RECVMMSG | |
58 | # elif !defined(OPENSSL_SYS_WINDOWS) && defined(CMSG_LEN) && !defined(NO_RECVMSG) | |
59 | # define M_METHOD M_METHOD_RECVMSG | |
60 | # elif !defined(NO_RECVFROM) | |
61 | # define M_METHOD M_METHOD_RECVFROM | |
62 | # else | |
63 | # define M_METHOD M_METHOD_NONE | |
64 | # endif | |
65 | # endif | |
66 | ||
67 | # if defined(OPENSSL_SYS_WINDOWS) | |
68 | # define BIO_CMSG_SPACE(x) WSA_CMSG_SPACE(x) | |
69 | # define BIO_CMSG_FIRSTHDR(x) WSA_CMSG_FIRSTHDR(x) | |
70 | # define BIO_CMSG_NXTHDR(x, y) WSA_CMSG_NXTHDR(x, y) | |
71 | # define BIO_CMSG_DATA(x) WSA_CMSG_DATA(x) | |
72 | # define BIO_CMSG_LEN(x) WSA_CMSG_LEN(x) | |
73 | # define MSGHDR_TYPE WSAMSG | |
74 | # define CMSGHDR_TYPE WSACMSGHDR | |
75 | # else | |
76 | # define MSGHDR_TYPE struct msghdr | |
77 | # define CMSGHDR_TYPE struct cmsghdr | |
78 | # define BIO_CMSG_SPACE(x) CMSG_SPACE(x) | |
79 | # define BIO_CMSG_FIRSTHDR(x) CMSG_FIRSTHDR(x) | |
80 | # define BIO_CMSG_NXTHDR(x, y) CMSG_NXTHDR(x, y) | |
81 | # define BIO_CMSG_DATA(x) CMSG_DATA(x) | |
82 | # define BIO_CMSG_LEN(x) CMSG_LEN(x) | |
83 | # endif | |
84 | ||
85 | # if M_METHOD == M_METHOD_RECVMMSG \ | |
86 | || M_METHOD == M_METHOD_RECVMSG \ | |
87 | || M_METHOD == M_METHOD_WSARECVMSG | |
88 | # if defined(__APPLE__) | |
89 | /* | |
90 | * CMSG_SPACE is not a constant expresson on OSX even though POSIX | |
91 | * says it's supposed to be. This should be adequate. | |
92 | */ | |
93 | # define BIO_CMSG_ALLOC_LEN 64 | |
94 | # else | |
95 | # if defined(IPV6_PKTINFO) | |
96 | # define BIO_CMSG_ALLOC_LEN_1 BIO_CMSG_SPACE(sizeof(struct in6_pktinfo)) | |
97 | # else | |
98 | # define BIO_CMSG_ALLOC_LEN_1 0 | |
99 | # endif | |
100 | # if defined(IP_PKTINFO) | |
101 | # define BIO_CMSG_ALLOC_LEN_2 BIO_CMSG_SPACE(sizeof(struct in_pktinfo)) | |
102 | # else | |
103 | # define BIO_CMSG_ALLOC_LEN_2 0 | |
104 | # endif | |
105 | # if defined(IP_RECVDSTADDR) | |
106 | # define BIO_CMSG_ALLOC_LEN_3 BIO_CMSG_SPACE(sizeof(struct in_addr)) | |
107 | # else | |
108 | # define BIO_CMSG_ALLOC_LEN_3 0 | |
109 | # endif | |
110 | # define BIO_MAX(X,Y) ((X) > (Y) ? (X) : (Y)) | |
111 | # define BIO_CMSG_ALLOC_LEN \ | |
112 | BIO_MAX(BIO_CMSG_ALLOC_LEN_1, \ | |
113 | BIO_MAX(BIO_CMSG_ALLOC_LEN_2, BIO_CMSG_ALLOC_LEN_3)) | |
114 | # endif | |
115 | # if (defined(IP_PKTINFO) || defined(IP_RECVDSTADDR)) && defined(IPV6_RECVPKTINFO) | |
116 | # define SUPPORT_LOCAL_ADDR | |
117 | # endif | |
118 | # endif | |
119 | ||
120 | # define BIO_MSG_N(array, stride, n) (*(BIO_MSG *)((char *)(array) + (n)*(stride))) | |
121 | ||
36d16f8e BL |
122 | static int dgram_write(BIO *h, const char *buf, int num); |
123 | static int dgram_read(BIO *h, char *buf, int size); | |
124 | static int dgram_puts(BIO *h, const char *str); | |
125 | static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2); | |
126 | static int dgram_new(BIO *h); | |
127 | static int dgram_free(BIO *data); | |
128 | static int dgram_clear(BIO *bio); | |
664e096c HL |
129 | static int dgram_sendmmsg(BIO *b, BIO_MSG *msg, |
130 | size_t stride, size_t num_msg, | |
131 | uint64_t flags, size_t *num_processed); | |
132 | static int dgram_recvmmsg(BIO *b, BIO_MSG *msg, | |
133 | size_t stride, size_t num_msg, | |
134 | uint64_t flags, size_t *num_processed); | |
36d16f8e | 135 | |
0f113f3e | 136 | # ifndef OPENSSL_NO_SCTP |
7e159e01 DSH |
137 | static int dgram_sctp_write(BIO *h, const char *buf, int num); |
138 | static int dgram_sctp_read(BIO *h, char *buf, int size); | |
139 | static int dgram_sctp_puts(BIO *h, const char *str); | |
140 | static long dgram_sctp_ctrl(BIO *h, int cmd, long arg1, void *arg2); | |
141 | static int dgram_sctp_new(BIO *h); | |
142 | static int dgram_sctp_free(BIO *data); | |
c8edb04f | 143 | static int dgram_sctp_wait_for_dry(BIO *b); |
144 | static int dgram_sctp_msg_waiting(BIO *b); | |
0f113f3e MC |
145 | # ifdef SCTP_AUTHENTICATION_EVENT |
146 | static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification | |
147 | *snp); | |
148 | # endif | |
149 | # endif | |
7e159e01 | 150 | |
b3e72fc3 | 151 | static int BIO_dgram_should_retry(int s); |
36d16f8e | 152 | |
04f6b0fd | 153 | static const BIO_METHOD methods_dgramp = { |
0f113f3e MC |
154 | BIO_TYPE_DGRAM, |
155 | "datagram socket", | |
3befffa3 | 156 | bwrite_conv, |
0f113f3e | 157 | dgram_write, |
d07aee2c | 158 | bread_conv, |
0f113f3e MC |
159 | dgram_read, |
160 | dgram_puts, | |
b4ff6622 | 161 | NULL, /* dgram_gets, */ |
0f113f3e MC |
162 | dgram_ctrl, |
163 | dgram_new, | |
164 | dgram_free, | |
b4ff6622 | 165 | NULL, /* dgram_callback_ctrl */ |
664e096c HL |
166 | dgram_sendmmsg, |
167 | dgram_recvmmsg, | |
0f113f3e MC |
168 | }; |
169 | ||
170 | # ifndef OPENSSL_NO_SCTP | |
04f6b0fd | 171 | static const BIO_METHOD methods_dgramp_sctp = { |
0f113f3e MC |
172 | BIO_TYPE_DGRAM_SCTP, |
173 | "datagram sctp socket", | |
992155d0 | 174 | bwrite_conv, |
0f113f3e | 175 | dgram_sctp_write, |
992155d0 | 176 | bread_conv, |
0f113f3e MC |
177 | dgram_sctp_read, |
178 | dgram_sctp_puts, | |
b4ff6622 | 179 | NULL, /* dgram_gets, */ |
0f113f3e MC |
180 | dgram_sctp_ctrl, |
181 | dgram_sctp_new, | |
182 | dgram_sctp_free, | |
b4ff6622 | 183 | NULL, /* dgram_callback_ctrl */ |
664e096c HL |
184 | NULL, /* sendmmsg */ |
185 | NULL, /* recvmmsg */ | |
0f113f3e MC |
186 | }; |
187 | # endif | |
7e159e01 | 188 | |
0f113f3e | 189 | typedef struct bio_dgram_data_st { |
d858c876 | 190 | BIO_ADDR peer; |
664e096c | 191 | BIO_ADDR local_addr; |
0f113f3e MC |
192 | unsigned int connected; |
193 | unsigned int _errno; | |
194 | unsigned int mtu; | |
5d1bb4fc P |
195 | OSSL_TIME next_timeout; |
196 | OSSL_TIME socket_timeout; | |
01b7851a | 197 | unsigned int peekmode; |
664e096c | 198 | char local_addr_enabled; |
0f113f3e MC |
199 | } bio_dgram_data; |
200 | ||
201 | # ifndef OPENSSL_NO_SCTP | |
202 | typedef struct bio_dgram_sctp_save_message_st { | |
203 | BIO *bio; | |
204 | char *data; | |
205 | int length; | |
206 | } bio_dgram_sctp_save_message; | |
207 | ||
208 | typedef struct bio_dgram_sctp_data_st { | |
d858c876 | 209 | BIO_ADDR peer; |
0f113f3e MC |
210 | unsigned int connected; |
211 | unsigned int _errno; | |
212 | unsigned int mtu; | |
213 | struct bio_dgram_sctp_sndinfo sndinfo; | |
214 | struct bio_dgram_sctp_rcvinfo rcvinfo; | |
215 | struct bio_dgram_sctp_prinfo prinfo; | |
c8edb04f | 216 | BIO_dgram_sctp_notification_handler_fn handle_notifications; |
0f113f3e MC |
217 | void *notification_context; |
218 | int in_handshake; | |
219 | int ccs_rcvd; | |
220 | int ccs_sent; | |
221 | int save_shutdown; | |
222 | int peer_auth_tested; | |
0f113f3e MC |
223 | } bio_dgram_sctp_data; |
224 | # endif | |
7e159e01 | 225 | |
04f6b0fd | 226 | const BIO_METHOD *BIO_s_datagram(void) |
0f113f3e | 227 | { |
26a7d938 | 228 | return &methods_dgramp; |
0f113f3e | 229 | } |
36d16f8e BL |
230 | |
231 | BIO *BIO_new_dgram(int fd, int close_flag) | |
0f113f3e MC |
232 | { |
233 | BIO *ret; | |
36d16f8e | 234 | |
0f113f3e MC |
235 | ret = BIO_new(BIO_s_datagram()); |
236 | if (ret == NULL) | |
26a7d938 | 237 | return NULL; |
0f113f3e | 238 | BIO_set_fd(ret, fd, close_flag); |
26a7d938 | 239 | return ret; |
0f113f3e | 240 | } |
36d16f8e BL |
241 | |
242 | static int dgram_new(BIO *bi) | |
0f113f3e | 243 | { |
b51bce94 | 244 | bio_dgram_data *data = OPENSSL_zalloc(sizeof(*data)); |
0f113f3e | 245 | |
0f113f3e MC |
246 | if (data == NULL) |
247 | return 0; | |
36d16f8e | 248 | bi->ptr = data; |
208fb891 | 249 | return 1; |
0f113f3e | 250 | } |
36d16f8e BL |
251 | |
252 | static int dgram_free(BIO *a) | |
0f113f3e MC |
253 | { |
254 | bio_dgram_data *data; | |
36d16f8e | 255 | |
0f113f3e | 256 | if (a == NULL) |
26a7d938 | 257 | return 0; |
0f113f3e MC |
258 | if (!dgram_clear(a)) |
259 | return 0; | |
36d16f8e | 260 | |
0f113f3e | 261 | data = (bio_dgram_data *)a->ptr; |
b548a1f1 | 262 | OPENSSL_free(data); |
36d16f8e | 263 | |
208fb891 | 264 | return 1; |
0f113f3e | 265 | } |
36d16f8e BL |
266 | |
267 | static int dgram_clear(BIO *a) | |
0f113f3e MC |
268 | { |
269 | if (a == NULL) | |
26a7d938 | 270 | return 0; |
0f113f3e MC |
271 | if (a->shutdown) { |
272 | if (a->init) { | |
8731a4fc | 273 | BIO_closesocket(a->num); |
0f113f3e MC |
274 | } |
275 | a->init = 0; | |
276 | a->flags = 0; | |
277 | } | |
208fb891 | 278 | return 1; |
0f113f3e | 279 | } |
eb38b26d DSH |
280 | |
281 | static void dgram_adjust_rcv_timeout(BIO *b) | |
0f113f3e MC |
282 | { |
283 | # if defined(SO_RCVTIMEO) | |
284 | bio_dgram_data *data = (bio_dgram_data *)b->ptr; | |
5d1bb4fc | 285 | OSSL_TIME timeleft; |
0f113f3e MC |
286 | |
287 | /* Is a timer active? */ | |
5d1bb4fc | 288 | if (!ossl_time_is_zero(data->next_timeout)) { |
0f113f3e MC |
289 | /* Read current socket timeout */ |
290 | # ifdef OPENSSL_SYS_WINDOWS | |
291 | int timeout; | |
8e949b35 | 292 | int sz = sizeof(timeout); |
5d1bb4fc | 293 | |
0f113f3e | 294 | if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, |
5d1bb4fc | 295 | (void *)&timeout, &sz) < 0) |
5121783b TS |
296 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), |
297 | "calling getsockopt()"); | |
5d1bb4fc P |
298 | else |
299 | data->socket_timeout = ossl_ms2time(timeout); | |
0f113f3e | 300 | # else |
5d1bb4fc P |
301 | struct timeval tv; |
302 | socklen_t sz = sizeof(tv); | |
303 | ||
304 | if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &tv, &sz) < 0) | |
5121783b TS |
305 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), |
306 | "calling getsockopt()"); | |
307 | else | |
5d1bb4fc | 308 | data->socket_timeout = ossl_time_from_timeval(tv); |
0f113f3e | 309 | # endif |
eb38b26d | 310 | |
0f113f3e | 311 | /* Calculate time left until timer expires */ |
5d1bb4fc P |
312 | timeleft = ossl_time_subtract(data->next_timeout, ossl_time_now()); |
313 | if (ossl_time_compare(timeleft, ossl_ticks2time(OSSL_TIME_US)) < 0) | |
314 | timeleft = ossl_ticks2time(OSSL_TIME_US); | |
0f113f3e MC |
315 | |
316 | /* | |
0d4fb843 | 317 | * Adjust socket timeout if next handshake message timer will expire |
0f113f3e MC |
318 | * earlier. |
319 | */ | |
5d1bb4fc P |
320 | if (ossl_time_is_zero(data->socket_timeout) |
321 | || ossl_time_compare(data->socket_timeout, timeleft) >= 0) { | |
0f113f3e | 322 | # ifdef OPENSSL_SYS_WINDOWS |
5d1bb4fc | 323 | timeout = (int)ossl_time2ms(timeleft); |
0f113f3e | 324 | if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, |
5121783b TS |
325 | (void *)&timeout, sizeof(timeout)) < 0) |
326 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), | |
327 | "calling setsockopt()"); | |
0f113f3e | 328 | # else |
5d1bb4fc P |
329 | tv = ossl_time_to_timeval(timeleft); |
330 | if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &tv, | |
331 | sizeof(tv)) < 0) | |
5121783b TS |
332 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), |
333 | "calling setsockopt()"); | |
0f113f3e MC |
334 | # endif |
335 | } | |
336 | } | |
337 | # endif | |
338 | } | |
eb38b26d | 339 | |
664e096c HL |
340 | static void dgram_update_local_addr(BIO *b) |
341 | { | |
342 | bio_dgram_data *data = (bio_dgram_data *)b->ptr; | |
343 | socklen_t addr_len = sizeof(data->local_addr); | |
344 | ||
345 | if (getsockname(b->num, &data->local_addr.sa, &addr_len) < 0) | |
346 | /* | |
347 | * This should not be possible, but zero-initialize and return | |
348 | * anyway. | |
349 | */ | |
350 | BIO_ADDR_clear(&data->local_addr); | |
351 | } | |
352 | ||
353 | # if M_METHOD == M_METHOD_RECVMMSG || M_METHOD == M_METHOD_RECVMSG || M_METHOD == M_METHOD_WSARECVMSG | |
354 | static int dgram_get_sock_family(BIO *b) | |
355 | { | |
356 | bio_dgram_data *data = (bio_dgram_data *)b->ptr; | |
357 | return data->local_addr.sa.sa_family; | |
358 | } | |
359 | # endif | |
360 | ||
eb38b26d | 361 | static void dgram_reset_rcv_timeout(BIO *b) |
0f113f3e MC |
362 | { |
363 | # if defined(SO_RCVTIMEO) | |
364 | bio_dgram_data *data = (bio_dgram_data *)b->ptr; | |
365 | ||
366 | /* Is a timer active? */ | |
5d1bb4fc | 367 | if (!ossl_time_is_zero(data->next_timeout)) { |
0f113f3e | 368 | # ifdef OPENSSL_SYS_WINDOWS |
5d1bb4fc P |
369 | int timeout = (int)ossl_time2ms(data->socket_timeout); |
370 | ||
0f113f3e | 371 | if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, |
5121783b TS |
372 | (void *)&timeout, sizeof(timeout)) < 0) |
373 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), | |
374 | "calling setsockopt()"); | |
0f113f3e | 375 | # else |
5d1bb4fc P |
376 | struct timeval tv = ossl_time_to_timeval(data->socket_timeout); |
377 | ||
378 | if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) < 0) | |
5121783b TS |
379 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), |
380 | "calling setsockopt()"); | |
0f113f3e MC |
381 | # endif |
382 | } | |
383 | # endif | |
384 | } | |
eb38b26d | 385 | |
36d16f8e | 386 | static int dgram_read(BIO *b, char *out, int outl) |
0f113f3e MC |
387 | { |
388 | int ret = 0; | |
389 | bio_dgram_data *data = (bio_dgram_data *)b->ptr; | |
01b7851a | 390 | int flags = 0; |
0f113f3e | 391 | |
d858c876 RL |
392 | BIO_ADDR peer; |
393 | socklen_t len = sizeof(peer); | |
0f113f3e MC |
394 | |
395 | if (out != NULL) { | |
396 | clear_socket_error(); | |
664e096c | 397 | BIO_ADDR_clear(&peer); |
0f113f3e | 398 | dgram_adjust_rcv_timeout(b); |
01b7851a MC |
399 | if (data->peekmode) |
400 | flags = MSG_PEEK; | |
d858c876 RL |
401 | ret = recvfrom(b->num, out, outl, flags, |
402 | BIO_ADDR_sockaddr_noconst(&peer), &len); | |
0f113f3e MC |
403 | |
404 | if (!data->connected && ret >= 0) | |
d858c876 | 405 | BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &peer); |
0f113f3e MC |
406 | |
407 | BIO_clear_retry_flags(b); | |
408 | if (ret < 0) { | |
409 | if (BIO_dgram_should_retry(ret)) { | |
410 | BIO_set_retry_read(b); | |
411 | data->_errno = get_last_socket_error(); | |
412 | } | |
413 | } | |
414 | ||
415 | dgram_reset_rcv_timeout(b); | |
416 | } | |
26a7d938 | 417 | return ret; |
0f113f3e | 418 | } |
36d16f8e BL |
419 | |
420 | static int dgram_write(BIO *b, const char *in, int inl) | |
0f113f3e MC |
421 | { |
422 | int ret; | |
423 | bio_dgram_data *data = (bio_dgram_data *)b->ptr; | |
424 | clear_socket_error(); | |
425 | ||
426 | if (data->connected) | |
427 | ret = writesocket(b->num, in, inl); | |
428 | else { | |
d858c876 | 429 | int peerlen = BIO_ADDR_sockaddr_size(&data->peer); |
0f113f3e | 430 | |
d858c876 RL |
431 | ret = sendto(b->num, in, inl, 0, |
432 | BIO_ADDR_sockaddr(&data->peer), peerlen); | |
0f113f3e MC |
433 | } |
434 | ||
435 | BIO_clear_retry_flags(b); | |
436 | if (ret <= 0) { | |
437 | if (BIO_dgram_should_retry(ret)) { | |
438 | BIO_set_retry_write(b); | |
439 | data->_errno = get_last_socket_error(); | |
0f113f3e MC |
440 | } |
441 | } | |
26a7d938 | 442 | return ret; |
0f113f3e | 443 | } |
36d16f8e | 444 | |
0d3ae34d | 445 | static long dgram_get_mtu_overhead(bio_dgram_data *data) |
0f113f3e MC |
446 | { |
447 | long ret; | |
448 | ||
d858c876 | 449 | switch (BIO_ADDR_family(&data->peer)) { |
0f113f3e MC |
450 | case AF_INET: |
451 | /* | |
452 | * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP | |
453 | */ | |
454 | ret = 28; | |
455 | break; | |
f36e9f11 | 456 | # if OPENSSL_USE_IPV6 |
0f113f3e | 457 | case AF_INET6: |
d858c876 | 458 | { |
0f113f3e | 459 | # ifdef IN6_IS_ADDR_V4MAPPED |
d858c876 RL |
460 | struct in6_addr tmp_addr; |
461 | if (BIO_ADDR_rawaddress(&data->peer, &tmp_addr, NULL) | |
462 | && IN6_IS_ADDR_V4MAPPED(&tmp_addr)) | |
463 | /* | |
464 | * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP | |
465 | */ | |
466 | ret = 28; | |
467 | else | |
0f113f3e MC |
468 | # endif |
469 | /* | |
470 | * Assume this is UDP - 40 bytes for IP, 8 bytes for UDP | |
471 | */ | |
472 | ret = 48; | |
d858c876 | 473 | } |
0f113f3e MC |
474 | break; |
475 | # endif | |
476 | default: | |
477 | /* We don't know. Go with the historical default */ | |
478 | ret = 28; | |
479 | break; | |
480 | } | |
481 | return ret; | |
482 | } | |
0d3ae34d | 483 | |
664e096c HL |
484 | /* Enables appropriate destination address reception option on the socket. */ |
485 | # if defined(SUPPORT_LOCAL_ADDR) | |
486 | static int enable_local_addr(BIO *b, int enable) { | |
487 | int af = dgram_get_sock_family(b); | |
488 | ||
489 | if (af == AF_INET) { | |
490 | # if defined(IP_PKTINFO) | |
491 | /* IP_PKTINFO is preferred */ | |
492 | if (setsockopt(b->num, IPPROTO_IP, IP_PKTINFO, | |
493 | (void *)&enable, sizeof(enable)) < 0) | |
494 | return 0; | |
495 | ||
496 | return 1; | |
497 | ||
498 | # elif defined(IP_RECVDSTADDR) | |
499 | /* Fall back to IP_RECVDSTADDR */ | |
500 | ||
501 | if (setsockopt(b->num, IPPROTO_IP, IP_RECVDSTADDR, | |
502 | &enable, sizeof(enable)) < 0) | |
503 | return 0; | |
504 | ||
505 | return 1; | |
506 | # endif | |
507 | } | |
508 | ||
509 | # if OPENSSL_USE_IPV6 | |
510 | if (af == AF_INET6) { | |
511 | # if defined(IPV6_RECVPKTINFO) | |
512 | if (setsockopt(b->num, IPPROTO_IPV6, IPV6_RECVPKTINFO, | |
513 | &enable, sizeof(enable)) < 0) | |
514 | return 0; | |
515 | ||
516 | return 1; | |
517 | # endif | |
518 | } | |
519 | # endif | |
520 | ||
521 | return 0; | |
522 | } | |
523 | # endif | |
524 | ||
36d16f8e | 525 | static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr) |
0f113f3e MC |
526 | { |
527 | long ret = 1; | |
528 | int *ip; | |
0f113f3e MC |
529 | bio_dgram_data *data = NULL; |
530 | int sockopt_val = 0; | |
b5292f7b | 531 | int d_errno; |
0f113f3e MC |
532 | # if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU)) |
533 | socklen_t sockopt_len; /* assume that system supporting IP_MTU is | |
534 | * modern enough to define socklen_t */ | |
535 | socklen_t addr_len; | |
d858c876 | 536 | BIO_ADDR addr; |
0f113f3e | 537 | # endif |
36d16f8e | 538 | |
0f113f3e MC |
539 | data = (bio_dgram_data *)b->ptr; |
540 | ||
541 | switch (cmd) { | |
542 | case BIO_CTRL_RESET: | |
543 | num = 0; | |
0f113f3e MC |
544 | ret = 0; |
545 | break; | |
0f113f3e MC |
546 | case BIO_CTRL_INFO: |
547 | ret = 0; | |
548 | break; | |
549 | case BIO_C_SET_FD: | |
550 | dgram_clear(b); | |
551 | b->num = *((int *)ptr); | |
552 | b->shutdown = (int)num; | |
553 | b->init = 1; | |
664e096c HL |
554 | dgram_update_local_addr(b); |
555 | # if defined(SUPPORT_LOCAL_ADDR) | |
556 | if (data->local_addr_enabled) { | |
557 | if (enable_local_addr(b, 1) < 1) | |
558 | data->local_addr_enabled = 0; | |
559 | } | |
560 | # endif | |
0f113f3e MC |
561 | break; |
562 | case BIO_C_GET_FD: | |
563 | if (b->init) { | |
564 | ip = (int *)ptr; | |
565 | if (ip != NULL) | |
566 | *ip = b->num; | |
567 | ret = b->num; | |
568 | } else | |
569 | ret = -1; | |
570 | break; | |
571 | case BIO_CTRL_GET_CLOSE: | |
572 | ret = b->shutdown; | |
573 | break; | |
574 | case BIO_CTRL_SET_CLOSE: | |
575 | b->shutdown = (int)num; | |
576 | break; | |
577 | case BIO_CTRL_PENDING: | |
578 | case BIO_CTRL_WPENDING: | |
579 | ret = 0; | |
580 | break; | |
581 | case BIO_CTRL_DUP: | |
582 | case BIO_CTRL_FLUSH: | |
583 | ret = 1; | |
584 | break; | |
585 | case BIO_CTRL_DGRAM_CONNECT: | |
d858c876 | 586 | BIO_ADDR_make(&data->peer, BIO_ADDR_sockaddr((BIO_ADDR *)ptr)); |
0f113f3e MC |
587 | break; |
588 | /* (Linux)kernel sets DF bit on outgoing IP packets */ | |
589 | case BIO_CTRL_DGRAM_MTU_DISCOVER: | |
590 | # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO) | |
591 | addr_len = (socklen_t) sizeof(addr); | |
664e096c | 592 | BIO_ADDR_clear(&addr); |
0f113f3e MC |
593 | if (getsockname(b->num, &addr.sa, &addr_len) < 0) { |
594 | ret = 0; | |
595 | break; | |
596 | } | |
597 | switch (addr.sa.sa_family) { | |
598 | case AF_INET: | |
599 | sockopt_val = IP_PMTUDISC_DO; | |
600 | if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER, | |
601 | &sockopt_val, sizeof(sockopt_val))) < 0) | |
5121783b TS |
602 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), |
603 | "calling setsockopt()"); | |
0f113f3e MC |
604 | break; |
605 | # if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO) | |
606 | case AF_INET6: | |
607 | sockopt_val = IPV6_PMTUDISC_DO; | |
608 | if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER, | |
609 | &sockopt_val, sizeof(sockopt_val))) < 0) | |
5121783b TS |
610 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), |
611 | "calling setsockopt()"); | |
0f113f3e MC |
612 | break; |
613 | # endif | |
614 | default: | |
615 | ret = -1; | |
616 | break; | |
617 | } | |
618 | # else | |
619 | ret = -1; | |
620 | # endif | |
621 | break; | |
622 | case BIO_CTRL_DGRAM_QUERY_MTU: | |
623 | # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU) | |
624 | addr_len = (socklen_t) sizeof(addr); | |
664e096c | 625 | BIO_ADDR_clear(&addr); |
0f113f3e MC |
626 | if (getsockname(b->num, &addr.sa, &addr_len) < 0) { |
627 | ret = 0; | |
628 | break; | |
629 | } | |
630 | sockopt_len = sizeof(sockopt_val); | |
631 | switch (addr.sa.sa_family) { | |
632 | case AF_INET: | |
633 | if ((ret = | |
634 | getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val, | |
635 | &sockopt_len)) < 0 || sockopt_val < 0) { | |
636 | ret = 0; | |
637 | } else { | |
638 | /* | |
639 | * we assume that the transport protocol is UDP and no IP | |
640 | * options are used. | |
641 | */ | |
642 | data->mtu = sockopt_val - 8 - 20; | |
643 | ret = data->mtu; | |
644 | } | |
645 | break; | |
646 | # if OPENSSL_USE_IPV6 && defined(IPV6_MTU) | |
647 | case AF_INET6: | |
648 | if ((ret = | |
649 | getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU, | |
650 | (void *)&sockopt_val, &sockopt_len)) < 0 | |
651 | || sockopt_val < 0) { | |
652 | ret = 0; | |
653 | } else { | |
654 | /* | |
655 | * we assume that the transport protocol is UDP and no IPV6 | |
656 | * options are used. | |
657 | */ | |
658 | data->mtu = sockopt_val - 8 - 40; | |
659 | ret = data->mtu; | |
660 | } | |
661 | break; | |
662 | # endif | |
663 | default: | |
664 | ret = 0; | |
665 | break; | |
666 | } | |
667 | # else | |
668 | ret = 0; | |
669 | # endif | |
670 | break; | |
671 | case BIO_CTRL_DGRAM_GET_FALLBACK_MTU: | |
672 | ret = -dgram_get_mtu_overhead(data); | |
d858c876 | 673 | switch (BIO_ADDR_family(&data->peer)) { |
0f113f3e MC |
674 | case AF_INET: |
675 | ret += 576; | |
676 | break; | |
677 | # if OPENSSL_USE_IPV6 | |
678 | case AF_INET6: | |
d858c876 | 679 | { |
0f113f3e | 680 | # ifdef IN6_IS_ADDR_V4MAPPED |
d858c876 RL |
681 | struct in6_addr tmp_addr; |
682 | if (BIO_ADDR_rawaddress(&data->peer, &tmp_addr, NULL) | |
683 | && IN6_IS_ADDR_V4MAPPED(&tmp_addr)) | |
684 | ret += 576; | |
685 | else | |
0f113f3e | 686 | # endif |
d858c876 RL |
687 | ret += 1280; |
688 | } | |
0f113f3e MC |
689 | break; |
690 | # endif | |
691 | default: | |
692 | ret += 576; | |
693 | break; | |
694 | } | |
695 | break; | |
696 | case BIO_CTRL_DGRAM_GET_MTU: | |
697 | return data->mtu; | |
0f113f3e MC |
698 | case BIO_CTRL_DGRAM_SET_MTU: |
699 | data->mtu = num; | |
700 | ret = num; | |
701 | break; | |
702 | case BIO_CTRL_DGRAM_SET_CONNECTED: | |
d858c876 | 703 | if (ptr != NULL) { |
0f113f3e | 704 | data->connected = 1; |
d858c876 | 705 | BIO_ADDR_make(&data->peer, BIO_ADDR_sockaddr((BIO_ADDR *)ptr)); |
0f113f3e MC |
706 | } else { |
707 | data->connected = 0; | |
664e096c | 708 | BIO_ADDR_clear(&data->peer); |
0f113f3e MC |
709 | } |
710 | break; | |
711 | case BIO_CTRL_DGRAM_GET_PEER: | |
d858c876 RL |
712 | ret = BIO_ADDR_sockaddr_size(&data->peer); |
713 | /* FIXME: if num < ret, we will only return part of an address. | |
714 | That should bee an error, no? */ | |
0f113f3e MC |
715 | if (num == 0 || num > ret) |
716 | num = ret; | |
717 | memcpy(ptr, &data->peer, (ret = num)); | |
718 | break; | |
719 | case BIO_CTRL_DGRAM_SET_PEER: | |
d858c876 | 720 | BIO_ADDR_make(&data->peer, BIO_ADDR_sockaddr((BIO_ADDR *)ptr)); |
0f113f3e MC |
721 | break; |
722 | case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT: | |
5d1bb4fc | 723 | data->next_timeout = ossl_time_from_timeval(*(struct timeval *)ptr); |
0f113f3e MC |
724 | break; |
725 | # if defined(SO_RCVTIMEO) | |
726 | case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT: | |
727 | # ifdef OPENSSL_SYS_WINDOWS | |
728 | { | |
729 | struct timeval *tv = (struct timeval *)ptr; | |
730 | int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000; | |
5d1bb4fc | 731 | |
5121783b TS |
732 | if ((ret = setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, |
733 | (void *)&timeout, sizeof(timeout))) < 0) | |
734 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), | |
735 | "calling setsockopt()"); | |
0f113f3e MC |
736 | } |
737 | # else | |
5121783b TS |
738 | if ((ret = setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr, |
739 | sizeof(struct timeval))) < 0) | |
740 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), | |
741 | "calling setsockopt()"); | |
0f113f3e MC |
742 | # endif |
743 | break; | |
744 | case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT: | |
745 | { | |
0f113f3e | 746 | # ifdef OPENSSL_SYS_WINDOWS |
8e949b35 | 747 | int sz = 0; |
0f113f3e MC |
748 | int timeout; |
749 | struct timeval *tv = (struct timeval *)ptr; | |
750 | ||
8e949b35 | 751 | sz = sizeof(timeout); |
5121783b TS |
752 | if ((ret = getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, |
753 | (void *)&timeout, &sz)) < 0) { | |
754 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), | |
755 | "calling getsockopt()"); | |
0f113f3e MC |
756 | } else { |
757 | tv->tv_sec = timeout / 1000; | |
758 | tv->tv_usec = (timeout % 1000) * 1000; | |
759 | ret = sizeof(*tv); | |
760 | } | |
761 | # else | |
8e949b35 | 762 | socklen_t sz = sizeof(struct timeval); |
5121783b TS |
763 | if ((ret = getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, |
764 | ptr, &sz)) < 0) { | |
765 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), | |
766 | "calling getsockopt()"); | |
8e949b35 TK |
767 | } else { |
768 | OPENSSL_assert(sz <= sizeof(struct timeval)); | |
769 | ret = (int)sz; | |
770 | } | |
0f113f3e MC |
771 | # endif |
772 | } | |
773 | break; | |
774 | # endif | |
775 | # if defined(SO_SNDTIMEO) | |
776 | case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT: | |
777 | # ifdef OPENSSL_SYS_WINDOWS | |
778 | { | |
779 | struct timeval *tv = (struct timeval *)ptr; | |
780 | int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000; | |
5121783b TS |
781 | |
782 | if ((ret = setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, | |
783 | (void *)&timeout, sizeof(timeout))) < 0) | |
784 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), | |
785 | "calling setsockopt()"); | |
0f113f3e MC |
786 | } |
787 | # else | |
5121783b TS |
788 | if ((ret = setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr, |
789 | sizeof(struct timeval))) < 0) | |
790 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), | |
791 | "calling setsockopt()"); | |
0f113f3e MC |
792 | # endif |
793 | break; | |
794 | case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT: | |
795 | { | |
0f113f3e | 796 | # ifdef OPENSSL_SYS_WINDOWS |
8e949b35 | 797 | int sz = 0; |
0f113f3e MC |
798 | int timeout; |
799 | struct timeval *tv = (struct timeval *)ptr; | |
800 | ||
8e949b35 | 801 | sz = sizeof(timeout); |
5121783b TS |
802 | if ((ret = getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, |
803 | (void *)&timeout, &sz)) < 0) { | |
804 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), | |
805 | "calling getsockopt()"); | |
0f113f3e MC |
806 | } else { |
807 | tv->tv_sec = timeout / 1000; | |
808 | tv->tv_usec = (timeout % 1000) * 1000; | |
809 | ret = sizeof(*tv); | |
810 | } | |
811 | # else | |
8e949b35 | 812 | socklen_t sz = sizeof(struct timeval); |
5121783b TS |
813 | |
814 | if ((ret = getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, | |
815 | ptr, &sz)) < 0) { | |
816 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), | |
817 | "calling getsockopt()"); | |
8e949b35 TK |
818 | } else { |
819 | OPENSSL_assert(sz <= sizeof(struct timeval)); | |
820 | ret = (int)sz; | |
821 | } | |
0f113f3e MC |
822 | # endif |
823 | } | |
824 | break; | |
825 | # endif | |
826 | case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP: | |
827 | /* fall-through */ | |
828 | case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP: | |
829 | # ifdef OPENSSL_SYS_WINDOWS | |
b5292f7b | 830 | d_errno = (data->_errno == WSAETIMEDOUT); |
0f113f3e | 831 | # else |
b5292f7b | 832 | d_errno = (data->_errno == EAGAIN); |
0f113f3e | 833 | # endif |
b5292f7b | 834 | if (d_errno) { |
0f113f3e MC |
835 | ret = 1; |
836 | data->_errno = 0; | |
837 | } else | |
838 | ret = 0; | |
839 | break; | |
840 | # ifdef EMSGSIZE | |
841 | case BIO_CTRL_DGRAM_MTU_EXCEEDED: | |
842 | if (data->_errno == EMSGSIZE) { | |
843 | ret = 1; | |
844 | data->_errno = 0; | |
845 | } else | |
846 | ret = 0; | |
847 | break; | |
848 | # endif | |
849 | case BIO_CTRL_DGRAM_SET_DONT_FRAG: | |
850 | sockopt_val = num ? 1 : 0; | |
851 | ||
852 | switch (data->peer.sa.sa_family) { | |
853 | case AF_INET: | |
854 | # if defined(IP_DONTFRAG) | |
855 | if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAG, | |
5121783b TS |
856 | &sockopt_val, sizeof(sockopt_val))) < 0) |
857 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), | |
858 | "calling setsockopt()"); | |
133dce44 | 859 | # elif defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined (IP_PMTUDISC_PROBE) |
0f113f3e MC |
860 | if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT), |
861 | (ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER, | |
5121783b TS |
862 | &sockopt_val, sizeof(sockopt_val))) < 0) |
863 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), | |
864 | "calling setsockopt()"); | |
0f113f3e MC |
865 | # elif defined(OPENSSL_SYS_WINDOWS) && defined(IP_DONTFRAGMENT) |
866 | if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAGMENT, | |
867 | (const char *)&sockopt_val, | |
5121783b TS |
868 | sizeof(sockopt_val))) < 0) |
869 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), | |
870 | "calling setsockopt()"); | |
0f113f3e MC |
871 | # else |
872 | ret = -1; | |
873 | # endif | |
874 | break; | |
875 | # if OPENSSL_USE_IPV6 | |
876 | case AF_INET6: | |
877 | # if defined(IPV6_DONTFRAG) | |
878 | if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_DONTFRAG, | |
879 | (const void *)&sockopt_val, | |
5121783b TS |
880 | sizeof(sockopt_val))) < 0) |
881 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), | |
882 | "calling setsockopt()"); | |
883 | ||
0f113f3e MC |
884 | # elif defined(OPENSSL_SYS_LINUX) && defined(IPV6_MTUDISCOVER) |
885 | if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT), | |
886 | (ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER, | |
5121783b TS |
887 | &sockopt_val, sizeof(sockopt_val))) < 0) |
888 | ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(), | |
889 | "calling setsockopt()"); | |
0f113f3e MC |
890 | # else |
891 | ret = -1; | |
892 | # endif | |
893 | break; | |
894 | # endif | |
895 | default: | |
896 | ret = -1; | |
897 | break; | |
898 | } | |
899 | break; | |
900 | case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD: | |
901 | ret = dgram_get_mtu_overhead(data); | |
902 | break; | |
99240875 MC |
903 | |
904 | /* | |
905 | * BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE is used here for compatibility | |
906 | * reasons. When BIO_CTRL_DGRAM_SET_PEEK_MODE was first defined its value | |
907 | * was incorrectly clashing with BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE. The | |
908 | * value has been updated to a non-clashing value. However to preserve | |
c2969ff6 | 909 | * binary compatibility we now respond to both the old value and the new one |
99240875 MC |
910 | */ |
911 | case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE: | |
01b7851a MC |
912 | case BIO_CTRL_DGRAM_SET_PEEK_MODE: |
913 | data->peekmode = (unsigned int)num; | |
914 | break; | |
664e096c HL |
915 | |
916 | case BIO_CTRL_DGRAM_GET_LOCAL_ADDR_CAP: | |
917 | # if defined(SUPPORT_LOCAL_ADDR) | |
918 | ret = 1; | |
919 | # else | |
920 | ret = 0; | |
921 | # endif | |
922 | break; | |
923 | ||
924 | case BIO_CTRL_DGRAM_SET_LOCAL_ADDR_ENABLE: | |
925 | # if defined(SUPPORT_LOCAL_ADDR) | |
926 | num = num > 0; | |
927 | if (num != data->local_addr_enabled) { | |
928 | if (enable_local_addr(b, num) < 1) { | |
929 | ret = 0; | |
930 | break; | |
931 | } | |
932 | ||
933 | data->local_addr_enabled = (char)num; | |
934 | } | |
935 | # else | |
936 | ret = 0; | |
937 | # endif | |
938 | break; | |
939 | ||
940 | case BIO_CTRL_DGRAM_GET_LOCAL_ADDR_ENABLE: | |
941 | *(int *)ptr = data->local_addr_enabled; | |
942 | break; | |
943 | ||
0f113f3e MC |
944 | default: |
945 | ret = 0; | |
946 | break; | |
947 | } | |
5121783b TS |
948 | /* Normalize if error */ |
949 | if (ret < 0) | |
950 | ret = -1; | |
26a7d938 | 951 | return ret; |
0f113f3e | 952 | } |
36d16f8e BL |
953 | |
954 | static int dgram_puts(BIO *bp, const char *str) | |
0f113f3e MC |
955 | { |
956 | int n, ret; | |
36d16f8e | 957 | |
0f113f3e MC |
958 | n = strlen(str); |
959 | ret = dgram_write(bp, str, n); | |
26a7d938 | 960 | return ret; |
0f113f3e | 961 | } |
36d16f8e | 962 | |
664e096c HL |
963 | # if M_METHOD == M_METHOD_WSARECVMSG |
964 | static void translate_msg_win(BIO *b, WSAMSG *mh, WSABUF *iov, | |
965 | unsigned char *control, BIO_MSG *msg) | |
966 | { | |
967 | iov->len = msg->data_len; | |
968 | iov->buf = msg->data; | |
969 | ||
970 | /* Windows requires namelen to be set exactly */ | |
971 | mh->name = msg->peer != NULL ? &msg->peer->sa : NULL; | |
972 | if (msg->peer != NULL && dgram_get_sock_family(b) == AF_INET) | |
973 | mh->namelen = sizeof(struct sockaddr_in); | |
974 | # if OPENSSL_USE_IPV6 | |
975 | else if (msg->peer != NULL && dgram_get_sock_family(b) == AF_INET6) | |
976 | mh->namelen = sizeof(struct sockaddr_in6); | |
977 | # endif | |
978 | else | |
979 | mh->namelen = 0; | |
980 | ||
981 | /* | |
982 | * When local address reception (IP_PKTINFO, etc.) is enabled, on Windows | |
983 | * this causes WSARecvMsg to fail if the control buffer is too small to hold | |
984 | * the structure, or if no control buffer is passed. So we need to give it | |
985 | * the control buffer even if we aren't actually going to examine the | |
986 | * result. | |
987 | */ | |
988 | mh->lpBuffers = iov; | |
989 | mh->dwBufferCount = 1; | |
990 | mh->Control.len = BIO_CMSG_ALLOC_LEN; | |
991 | mh->Control.buf = control; | |
992 | mh->dwFlags = 0; | |
993 | } | |
994 | # endif | |
995 | ||
996 | # if M_METHOD == M_METHOD_RECVMMSG || M_METHOD == M_METHOD_RECVMSG | |
997 | /* Translates a BIO_MSG to a msghdr and iovec. */ | |
998 | static void translate_msg(BIO *b, struct msghdr *mh, struct iovec *iov, | |
999 | unsigned char *control, BIO_MSG *msg) | |
1000 | { | |
1001 | iov->iov_base = msg->data; | |
1002 | iov->iov_len = msg->data_len; | |
1003 | ||
1004 | /* macOS requires msg_namelen be 0 if msg_name is NULL */ | |
1005 | mh->msg_name = msg->peer != NULL ? &msg->peer->sa : NULL; | |
1006 | if (msg->peer != NULL && dgram_get_sock_family(b) == AF_INET) | |
1007 | mh->msg_namelen = sizeof(struct sockaddr_in); | |
1008 | # if OPENSSL_USE_IPV6 | |
1009 | else if (msg->peer != NULL && dgram_get_sock_family(b) == AF_INET6) | |
1010 | mh->msg_namelen = sizeof(struct sockaddr_in6); | |
1011 | # endif | |
1012 | else | |
1013 | mh->msg_namelen = 0; | |
1014 | ||
1015 | mh->msg_iov = iov; | |
1016 | mh->msg_iovlen = 1; | |
1017 | mh->msg_control = msg->local != NULL ? control : NULL; | |
1018 | mh->msg_controllen = msg->local != NULL ? BIO_CMSG_ALLOC_LEN : 0; | |
1019 | mh->msg_flags = 0; | |
1020 | } | |
1021 | # endif | |
1022 | ||
1023 | # if M_METHOD == M_METHOD_RECVMMSG || M_METHOD == M_METHOD_RECVMSG || M_METHOD == M_METHOD_WSARECVMSG | |
1024 | /* Extracts destination address from the control buffer. */ | |
1025 | static int extract_local(BIO *b, MSGHDR_TYPE *mh, BIO_ADDR *local) { | |
1026 | # if defined(IP_PKTINFO) || defined(IP_RECVDSTADDR) || defined(IPV6_PKTINFO) | |
1027 | CMSGHDR_TYPE *cmsg; | |
1028 | int af = dgram_get_sock_family(b); | |
1029 | ||
1030 | for (cmsg = BIO_CMSG_FIRSTHDR(mh); cmsg != NULL; | |
1031 | cmsg = BIO_CMSG_NXTHDR(mh, cmsg)) { | |
1032 | if (af == AF_INET) { | |
1033 | if (cmsg->cmsg_level != IPPROTO_IP) | |
1034 | continue; | |
1035 | ||
1036 | # if defined(IP_PKTINFO) | |
1037 | if (cmsg->cmsg_type != IP_PKTINFO) | |
1038 | continue; | |
1039 | ||
1040 | local->s_in.sin_addr = | |
1041 | ((struct in_pktinfo *)BIO_CMSG_DATA(cmsg))->ipi_addr; | |
1042 | ||
1043 | # elif defined(IP_RECVDSTADDR) | |
1044 | if (cmsg->cmsg_type != IP_RECVDSTADDR) | |
1045 | continue; | |
1046 | ||
1047 | local->s_in.sin_addr = *(struct in_addr *)BIO_CMSG_DATA(cmsg); | |
1048 | # endif | |
1049 | ||
1050 | # if defined(IP_PKTINFO) || defined(IP_RECVDSTADDR) | |
1051 | { | |
1052 | bio_dgram_data *data = b->ptr; | |
1053 | ||
1054 | local->s_in.sin_family = AF_INET; | |
1055 | local->s_in.sin_port = data->local_addr.s_in.sin_port; | |
1056 | } | |
1057 | return 1; | |
1058 | # endif | |
1059 | } | |
1060 | # if OPENSSL_USE_IPV6 | |
1061 | else if (af == AF_INET6) { | |
1062 | if (cmsg->cmsg_level != IPPROTO_IPV6) | |
1063 | continue; | |
1064 | ||
1065 | # if defined(IPV6_RECVPKTINFO) | |
1066 | if (cmsg->cmsg_type != IPV6_PKTINFO) | |
1067 | continue; | |
1068 | ||
1069 | { | |
1070 | bio_dgram_data *data = b->ptr; | |
1071 | ||
1072 | local->s_in6.sin6_addr = | |
1073 | ((struct in6_pktinfo *)BIO_CMSG_DATA(cmsg))->ipi6_addr; | |
1074 | local->s_in6.sin6_family = AF_INET6; | |
1075 | local->s_in6.sin6_port = data->local_addr.s_in6.sin6_port; | |
1076 | local->s_in6.sin6_scope_id = | |
1077 | data->local_addr.s_in6.sin6_scope_id; | |
1078 | local->s_in6.sin6_flowinfo = 0; | |
1079 | } | |
1080 | return 1; | |
1081 | # endif | |
1082 | } | |
1083 | # endif | |
1084 | } | |
1085 | # endif | |
1086 | ||
1087 | return 0; | |
1088 | } | |
1089 | ||
1090 | static int pack_local(BIO *b, MSGHDR_TYPE *mh, const BIO_ADDR *local) { | |
1091 | int af = dgram_get_sock_family(b); | |
ed822619 TM |
1092 | # if defined(IP_PKTINFO) || defined(IP_RECVDSTADDR) || defined(IPV6_PKTINFO) |
1093 | CMSGHDR_TYPE *cmsg; | |
1094 | bio_dgram_data *data = b->ptr; | |
1095 | # endif | |
664e096c HL |
1096 | |
1097 | if (af == AF_INET) { | |
1098 | # if defined(IP_PKTINFO) | |
664e096c | 1099 | struct in_pktinfo *info; |
664e096c HL |
1100 | |
1101 | # if defined(OPENSSL_SYS_WINDOWS) | |
1102 | cmsg = (CMSGHDR_TYPE *)mh->Control.buf; | |
1103 | # else | |
1104 | cmsg = (CMSGHDR_TYPE *)mh->msg_control; | |
1105 | # endif | |
1106 | ||
1107 | cmsg->cmsg_len = BIO_CMSG_LEN(sizeof(struct in_pktinfo)); | |
1108 | cmsg->cmsg_level = IPPROTO_IP; | |
1109 | cmsg->cmsg_type = IP_PKTINFO; | |
1110 | ||
1111 | info = (struct in_pktinfo *)BIO_CMSG_DATA(cmsg); | |
7f4c6574 | 1112 | # if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_CYGWIN) |
664e096c | 1113 | info->ipi_spec_dst = local->s_in.sin_addr; |
7f4c6574 | 1114 | # endif |
664e096c HL |
1115 | info->ipi_addr.s_addr = 0; |
1116 | info->ipi_ifindex = 0; | |
1117 | ||
1118 | /* | |
1119 | * We cannot override source port using this API, therefore | |
1120 | * ensure the application specified a source port of 0 | |
1121 | * or the one we are bound to. (Better to error than silently | |
1122 | * ignore this.) | |
1123 | */ | |
1124 | if (local->s_in.sin_port != 0 | |
1125 | && data->local_addr.s_in.sin_port != local->s_in.sin_port) { | |
1126 | ERR_raise(ERR_LIB_BIO, BIO_R_PORT_MISMATCH); | |
1127 | return 0; | |
1128 | } | |
1129 | ||
1130 | # if defined(OPENSSL_SYS_WINDOWS) | |
1131 | mh->Control.len = BIO_CMSG_SPACE(sizeof(struct in_pktinfo)); | |
1132 | # else | |
1133 | mh->msg_controllen = BIO_CMSG_SPACE(sizeof(struct in_pktinfo)); | |
1134 | # endif | |
1135 | return 1; | |
1136 | ||
1137 | # elif defined(IP_SENDSRCADDR) | |
ed822619 | 1138 | struct in_addr *info; |
664e096c | 1139 | |
07687790 HL |
1140 | /* |
1141 | * At least FreeBSD is very pedantic about using IP_SENDSRCADDR when we | |
1142 | * are not bound to 0.0.0.0 or ::, even if the address matches what we | |
1143 | * bound to. Support this by not packing the structure if the address | |
1144 | * matches our understanding of our local address. IP_SENDSRCADDR is a | |
1145 | * BSD thing, so we don't need an explicit test for BSD here. | |
1146 | */ | |
1147 | if (local->s_in.sin_addr.s_addr == data->local_addr.s_in.sin_addr.s_addr) { | |
1148 | mh->msg_control = NULL; | |
1149 | mh->msg_controllen = 0; | |
1150 | return 1; | |
1151 | } | |
1152 | ||
ed822619 TM |
1153 | cmsg = (struct cmsghdr *)mh->msg_control; |
1154 | cmsg->cmsg_len = BIO_CMSG_LEN(sizeof(struct in_addr)); | |
1155 | cmsg->cmsg_level = IPPROTO_IP; | |
1156 | cmsg->cmsg_type = IP_SENDSRCADDR; | |
664e096c | 1157 | |
ed822619 TM |
1158 | info = (struct in_addr *)BIO_CMSG_DATA(cmsg); |
1159 | *info = local->s_in.sin_addr; | |
664e096c HL |
1160 | |
1161 | /* See comment above. */ | |
1162 | if (local->s_in.sin_port != 0 | |
1163 | && data->local_addr.s_in.sin_port != local->s_in.sin_port) { | |
1164 | ERR_raise(ERR_LIB_BIO, BIO_R_PORT_MISMATCH); | |
1165 | return 0; | |
1166 | } | |
1167 | ||
1168 | mh->msg_controllen = BIO_CMSG_SPACE(sizeof(struct in_addr)); | |
1169 | return 1; | |
1170 | # endif | |
1171 | } | |
1172 | # if OPENSSL_USE_IPV6 | |
1173 | else if (af == AF_INET6) { | |
1174 | # if defined(IPV6_PKTINFO) | |
664e096c | 1175 | struct in6_pktinfo *info; |
664e096c HL |
1176 | |
1177 | # if defined(OPENSSL_SYS_WINDOWS) | |
1178 | cmsg = (CMSGHDR_TYPE *)mh->Control.buf; | |
1179 | # else | |
1180 | cmsg = (CMSGHDR_TYPE *)mh->msg_control; | |
1181 | # endif | |
1182 | cmsg->cmsg_len = BIO_CMSG_LEN(sizeof(struct in6_pktinfo)); | |
1183 | cmsg->cmsg_level = IPPROTO_IPV6; | |
1184 | cmsg->cmsg_type = IPV6_PKTINFO; | |
1185 | ||
1186 | info = (struct in6_pktinfo *)BIO_CMSG_DATA(cmsg); | |
1187 | info->ipi6_addr = local->s_in6.sin6_addr; | |
1188 | info->ipi6_ifindex = 0; | |
1189 | ||
1190 | /* | |
1191 | * See comment above, but also applies to the other fields | |
1192 | * in sockaddr_in6. | |
1193 | */ | |
1194 | if (local->s_in6.sin6_port != 0 | |
1195 | && data->local_addr.s_in6.sin6_port != local->s_in6.sin6_port) { | |
1196 | ERR_raise(ERR_LIB_BIO, BIO_R_PORT_MISMATCH); | |
1197 | return 0; | |
1198 | } | |
1199 | ||
1200 | if (local->s_in6.sin6_scope_id != 0 | |
1201 | && data->local_addr.s_in6.sin6_scope_id != local->s_in6.sin6_scope_id) { | |
1202 | ERR_raise(ERR_LIB_BIO, BIO_R_PORT_MISMATCH); | |
1203 | return 0; | |
1204 | } | |
1205 | ||
1206 | # if defined(OPENSSL_SYS_WINDOWS) | |
1207 | mh->Control.len = BIO_CMSG_SPACE(sizeof(struct in6_pktinfo)); | |
1208 | # else | |
1209 | mh->msg_controllen = BIO_CMSG_SPACE(sizeof(struct in6_pktinfo)); | |
1210 | # endif | |
1211 | return 1; | |
1212 | # endif | |
1213 | } | |
1214 | # endif | |
1215 | ||
1216 | return 0; | |
1217 | } | |
1218 | # endif | |
1219 | ||
1220 | /* | |
1221 | * Converts flags passed to BIO_sendmmsg or BIO_recvmmsg to syscall flags. You | |
1222 | * should mask out any system flags returned by this function you cannot support | |
1223 | * in a particular circumstance. Currently no flags are defined. | |
1224 | */ | |
1225 | # if M_METHOD != M_METHOD_NONE | |
1226 | static int translate_flags(uint64_t flags) { | |
1227 | return 0; | |
1228 | } | |
1229 | # endif | |
1230 | ||
1231 | static int dgram_sendmmsg(BIO *b, BIO_MSG *msg, size_t stride, | |
1232 | size_t num_msg, uint64_t flags, size_t *num_processed) | |
1233 | { | |
1234 | # if M_METHOD != M_METHOD_NONE && M_METHOD != M_METHOD_RECVMSG | |
1235 | int ret; | |
1236 | # endif | |
1237 | # if M_METHOD == M_METHOD_RECVMMSG | |
1238 | # define BIO_MAX_MSGS_PER_CALL 64 | |
1239 | int sysflags; | |
1240 | bio_dgram_data *data = (bio_dgram_data *)b->ptr; | |
1241 | size_t i; | |
1242 | struct mmsghdr mh[BIO_MAX_MSGS_PER_CALL]; | |
1243 | struct iovec iov[BIO_MAX_MSGS_PER_CALL]; | |
1244 | unsigned char control[BIO_MAX_MSGS_PER_CALL][BIO_CMSG_ALLOC_LEN]; | |
1245 | int have_local_enabled = data->local_addr_enabled; | |
1246 | # elif M_METHOD == M_METHOD_RECVMSG | |
1247 | int sysflags; | |
1248 | bio_dgram_data *data = (bio_dgram_data *)b->ptr; | |
1249 | ossl_ssize_t l; | |
1250 | struct msghdr mh; | |
1251 | struct iovec iov; | |
1252 | unsigned char control[BIO_CMSG_ALLOC_LEN]; | |
1253 | int have_local_enabled = data->local_addr_enabled; | |
1254 | # elif M_METHOD == M_METHOD_WSARECVMSG | |
1255 | bio_dgram_data *data = (bio_dgram_data *)b->ptr; | |
1256 | int have_local_enabled = data->local_addr_enabled; | |
1257 | WSAMSG wmsg; | |
1258 | WSABUF wbuf; | |
1259 | DWORD num_bytes_sent = 0; | |
1260 | unsigned char control[BIO_CMSG_ALLOC_LEN]; | |
1261 | # endif | |
1262 | # if M_METHOD == M_METHOD_RECVFROM || M_METHOD == M_METHOD_WSARECVMSG | |
1263 | int sysflags; | |
1264 | # endif | |
1265 | ||
1266 | if (num_msg == 0) { | |
1267 | *num_processed = 0; | |
1268 | return 1; | |
1269 | } | |
1270 | ||
1271 | if (num_msg > OSSL_SSIZE_MAX) | |
1272 | num_msg = OSSL_SSIZE_MAX; | |
1273 | ||
1274 | # if M_METHOD != M_METHOD_NONE | |
1275 | sysflags = translate_flags(flags); | |
1276 | # endif | |
1277 | ||
1278 | # if M_METHOD == M_METHOD_RECVMMSG | |
1279 | /* | |
1280 | * In the sendmmsg/recvmmsg case, we need to allocate our translated struct | |
1281 | * msghdr and struct iovec on the stack to support multithreaded use. Thus | |
1282 | * we place a fixed limit on the number of messages per call, in the | |
1283 | * expectation that we will be called again if there were more messages to | |
1284 | * be sent. | |
1285 | */ | |
1286 | if (num_msg > BIO_MAX_MSGS_PER_CALL) | |
1287 | num_msg = BIO_MAX_MSGS_PER_CALL; | |
1288 | ||
1289 | for (i = 0; i < num_msg; ++i) { | |
1290 | translate_msg(b, &mh[i].msg_hdr, &iov[i], | |
1291 | control[i], &BIO_MSG_N(msg, stride, i)); | |
1292 | ||
1293 | /* If local address was requested, it must have been enabled */ | |
1294 | if (BIO_MSG_N(msg, stride, i).local != NULL) { | |
1295 | if (!have_local_enabled) { | |
1296 | ERR_raise(ERR_LIB_BIO, BIO_R_LOCAL_ADDR_NOT_AVAILABLE); | |
1297 | *num_processed = 0; | |
1298 | return 0; | |
1299 | } | |
1300 | ||
1301 | if (pack_local(b, &mh[i].msg_hdr, | |
1302 | BIO_MSG_N(msg, stride, i).local) < 1) { | |
1303 | ERR_raise(ERR_LIB_BIO, BIO_R_LOCAL_ADDR_NOT_AVAILABLE); | |
1304 | *num_processed = 0; | |
1305 | return 0; | |
1306 | } | |
1307 | } | |
1308 | } | |
1309 | ||
1310 | /* Do the batch */ | |
1311 | ret = sendmmsg(b->num, mh, num_msg, sysflags); | |
1312 | if (ret < 0) { | |
1313 | ERR_raise(ERR_LIB_SYS, get_last_socket_error()); | |
1314 | *num_processed = 0; | |
1315 | return 0; | |
1316 | } | |
1317 | ||
1318 | for (i = 0; i < (size_t)ret; ++i) { | |
1319 | BIO_MSG_N(msg, stride, i).data_len = mh[i].msg_len; | |
1320 | BIO_MSG_N(msg, stride, i).flags = 0; | |
1321 | } | |
1322 | ||
1323 | *num_processed = (size_t)ret; | |
1324 | return 1; | |
1325 | ||
1326 | # elif M_METHOD == M_METHOD_RECVMSG | |
1327 | /* | |
1328 | * If sendmsg is available, use it. | |
1329 | */ | |
1330 | translate_msg(b, &mh, &iov, control, msg); | |
1331 | ||
1332 | if (msg->local != NULL) { | |
1333 | if (!have_local_enabled) { | |
1334 | ERR_raise(ERR_LIB_BIO, BIO_R_LOCAL_ADDR_NOT_AVAILABLE); | |
1335 | *num_processed = 0; | |
1336 | return 0; | |
1337 | } | |
1338 | ||
1339 | if (pack_local(b, &mh, msg->local) < 1) { | |
1340 | ERR_raise(ERR_LIB_BIO, BIO_R_LOCAL_ADDR_NOT_AVAILABLE); | |
1341 | *num_processed = 0; | |
1342 | return 0; | |
1343 | } | |
1344 | } | |
1345 | ||
1346 | l = sendmsg(b->num, &mh, sysflags); | |
1347 | if (l < 0) { | |
1348 | ERR_raise(ERR_LIB_SYS, get_last_socket_error()); | |
1349 | *num_processed = 0; | |
1350 | return 0; | |
1351 | } | |
1352 | ||
1353 | msg->data_len = (size_t)l; | |
1354 | msg->flags = 0; | |
1355 | *num_processed = 1; | |
1356 | return 1; | |
1357 | ||
1358 | # elif M_METHOD == M_METHOD_WSARECVMSG || M_METHOD == M_METHOD_RECVFROM | |
1359 | # if M_METHOD == M_METHOD_WSARECVMSG | |
1360 | if (bio_WSASendMsg != NULL) { | |
1361 | /* WSASendMsg-based implementation for Windows. */ | |
1362 | translate_msg_win(b, &wmsg, &wbuf, control, msg); | |
1363 | ||
1364 | if (msg[0].local != NULL) { | |
1365 | if (!have_local_enabled) { | |
1366 | ERR_raise(ERR_LIB_BIO, BIO_R_LOCAL_ADDR_NOT_AVAILABLE); | |
1367 | *num_processed = 0; | |
1368 | return 0; | |
1369 | } | |
1370 | ||
1371 | if (pack_local(b, &wmsg, msg[0].local) < 1) { | |
1372 | ERR_raise(ERR_LIB_BIO, BIO_R_LOCAL_ADDR_NOT_AVAILABLE); | |
1373 | *num_processed = 0; | |
1374 | return 0; | |
1375 | } | |
1376 | } | |
1377 | ||
1378 | ret = WSASendMsg((SOCKET)b->num, &wmsg, 0, &num_bytes_sent, NULL, NULL); | |
1379 | if (ret < 0) { | |
1380 | ERR_raise(ERR_LIB_SYS, get_last_socket_error()); | |
1381 | *num_processed = 0; | |
1382 | return 0; | |
1383 | } | |
1384 | ||
1385 | msg[0].data_len = num_bytes_sent; | |
1386 | msg[0].flags = 0; | |
1387 | *num_processed = 1; | |
1388 | return 1; | |
1389 | } | |
1390 | # endif | |
1391 | ||
1392 | /* | |
1393 | * Fallback to sendto and send a single message. | |
1394 | */ | |
1395 | if (msg[0].local != NULL) { | |
1396 | /* | |
1397 | * We cannot set the local address if using sendto | |
1398 | * so fail in this case | |
1399 | */ | |
1400 | ERR_raise(ERR_LIB_BIO, BIO_R_LOCAL_ADDR_NOT_AVAILABLE); | |
1401 | *num_processed = 0; | |
1402 | return 0; | |
1403 | } | |
1404 | ||
1405 | ret = sendto(b->num, msg[0].data, | |
1406 | # if defined(OPENSSL_SYS_WINDOWS) | |
1407 | (int)msg[0].data_len, | |
1408 | # else | |
1409 | msg[0].data_len, | |
1410 | # endif | |
1411 | sysflags, | |
1412 | msg[0].peer != NULL ? &msg[0].peer->sa : NULL, | |
1413 | msg[0].peer != NULL ? sizeof(*msg[0].peer) : 0); | |
1414 | if (ret <= 0) { | |
1415 | ERR_raise(ERR_LIB_SYS, get_last_socket_error()); | |
1416 | *num_processed = 0; | |
1417 | return 0; | |
1418 | } | |
1419 | ||
1420 | msg[0].data_len = ret; | |
1421 | msg[0].flags = 0; | |
1422 | *num_processed = 1; | |
1423 | return 1; | |
1424 | ||
1425 | # else | |
1426 | ERR_raise(ERR_LIB_BIO, BIO_R_UNSUPPORTED_METHOD); | |
1427 | *num_processed = 0; | |
1428 | return 0; | |
1429 | # endif | |
1430 | } | |
1431 | ||
1432 | static int dgram_recvmmsg(BIO *b, BIO_MSG *msg, | |
1433 | size_t stride, size_t num_msg, | |
1434 | uint64_t flags, size_t *num_processed) | |
1435 | { | |
1436 | # if M_METHOD != M_METHOD_NONE && M_METHOD != M_METHOD_RECVMSG | |
1437 | int ret; | |
1438 | # endif | |
1439 | # if M_METHOD == M_METHOD_RECVMMSG | |
1440 | int sysflags; | |
1441 | bio_dgram_data *data = (bio_dgram_data *)b->ptr; | |
1442 | size_t i; | |
1443 | struct mmsghdr mh[BIO_MAX_MSGS_PER_CALL]; | |
1444 | struct iovec iov[BIO_MAX_MSGS_PER_CALL]; | |
1445 | unsigned char control[BIO_MAX_MSGS_PER_CALL][BIO_CMSG_ALLOC_LEN]; | |
1446 | int have_local_enabled = data->local_addr_enabled; | |
1447 | # elif M_METHOD == M_METHOD_RECVMSG | |
1448 | int sysflags; | |
1449 | bio_dgram_data *data = (bio_dgram_data *)b->ptr; | |
1450 | ossl_ssize_t l; | |
1451 | struct msghdr mh; | |
1452 | struct iovec iov; | |
1453 | unsigned char control[BIO_CMSG_ALLOC_LEN]; | |
1454 | int have_local_enabled = data->local_addr_enabled; | |
1455 | # elif M_METHOD == M_METHOD_WSARECVMSG | |
1456 | bio_dgram_data *data = (bio_dgram_data *)b->ptr; | |
1457 | int have_local_enabled = data->local_addr_enabled; | |
1458 | WSAMSG wmsg; | |
1459 | WSABUF wbuf; | |
1460 | DWORD num_bytes_received = 0; | |
1461 | unsigned char control[BIO_CMSG_ALLOC_LEN]; | |
1462 | # endif | |
1463 | # if M_METHOD == M_METHOD_RECVFROM || M_METHOD == M_METHOD_WSARECVMSG | |
1464 | int sysflags; | |
1465 | socklen_t slen; | |
1466 | # endif | |
1467 | ||
1468 | if (num_msg == 0) { | |
1469 | *num_processed = 0; | |
1470 | return 1; | |
1471 | } | |
1472 | ||
1473 | if (num_msg > OSSL_SSIZE_MAX) | |
1474 | num_msg = OSSL_SSIZE_MAX; | |
1475 | ||
1476 | # if M_METHOD != M_METHOD_NONE | |
1477 | sysflags = translate_flags(flags); | |
1478 | # endif | |
1479 | ||
1480 | # if M_METHOD == M_METHOD_RECVMMSG | |
1481 | /* | |
1482 | * In the sendmmsg/recvmmsg case, we need to allocate our translated struct | |
1483 | * msghdr and struct iovec on the stack to support multithreaded use. Thus | |
1484 | * we place a fixed limit on the number of messages per call, in the | |
1485 | * expectation that we will be called again if there were more messages to | |
1486 | * be sent. | |
1487 | */ | |
1488 | if (num_msg > BIO_MAX_MSGS_PER_CALL) | |
1489 | num_msg = BIO_MAX_MSGS_PER_CALL; | |
1490 | ||
1491 | for (i = 0; i < num_msg; ++i) { | |
07687790 | 1492 | translate_msg(b, &mh[i].msg_hdr, &iov[i], |
664e096c HL |
1493 | control[i], &BIO_MSG_N(msg, stride, i)); |
1494 | ||
1495 | /* If local address was requested, it must have been enabled */ | |
1496 | if (BIO_MSG_N(msg, stride, i).local != NULL && !have_local_enabled) { | |
1497 | ERR_raise(ERR_LIB_BIO, BIO_R_LOCAL_ADDR_NOT_AVAILABLE); | |
1498 | *num_processed = 0; | |
1499 | return 0; | |
1500 | } | |
1501 | } | |
1502 | ||
1503 | /* Do the batch */ | |
1504 | ret = recvmmsg(b->num, mh, num_msg, sysflags, NULL); | |
1505 | if (ret < 0) { | |
1506 | ERR_raise(ERR_LIB_SYS, get_last_socket_error()); | |
1507 | *num_processed = 0; | |
1508 | return 0; | |
1509 | } | |
1510 | ||
1511 | for (i = 0; i < (size_t)ret; ++i) { | |
1512 | BIO_MSG_N(msg, stride, i).data_len = mh[i].msg_len; | |
1513 | BIO_MSG_N(msg, stride, i).flags = 0; | |
1514 | /* | |
1515 | * *(msg->peer) will have been filled in by recvmmsg; | |
1516 | * for msg->local we parse the control data returned | |
1517 | */ | |
1518 | if (BIO_MSG_N(msg, stride, i).local != NULL) | |
1519 | if (extract_local(b, &mh[i].msg_hdr, | |
07687790 HL |
1520 | BIO_MSG_N(msg, stride, i).local) < 1) |
1521 | /* | |
1522 | * It appears BSDs do not support local addresses for | |
1523 | * loopback sockets. In this case, just clear the local | |
1524 | * address, as for OS X and Windows in some circumstances | |
1525 | * (see below). | |
1526 | */ | |
1527 | BIO_ADDR_clear(msg->local); | |
664e096c HL |
1528 | } |
1529 | ||
1530 | *num_processed = (size_t)ret; | |
1531 | return 1; | |
1532 | ||
1533 | # elif M_METHOD == M_METHOD_RECVMSG | |
1534 | /* | |
1535 | * If recvmsg is available, use it. | |
1536 | */ | |
1537 | translate_msg(b, &mh, &iov, control, msg); | |
1538 | ||
1539 | /* If local address was requested, it must have been enabled */ | |
1540 | if (msg->local != NULL && !have_local_enabled) { | |
1541 | /* | |
1542 | * If we have done at least one message, we must return the | |
1543 | * count; if we haven't done any, we can give an error code | |
1544 | */ | |
1545 | ERR_raise(ERR_LIB_BIO, BIO_R_LOCAL_ADDR_NOT_AVAILABLE); | |
1546 | *num_processed = 0; | |
1547 | return 0; | |
1548 | } | |
1549 | ||
1550 | l = recvmsg(b->num, &mh, sysflags); | |
1551 | if (l < 0) { | |
1552 | ERR_raise(ERR_LIB_SYS, get_last_socket_error()); | |
1553 | *num_processed = 0; | |
1554 | return 0; | |
1555 | } | |
1556 | ||
1557 | msg->data_len = (size_t)l; | |
1558 | msg->flags = 0; | |
1559 | ||
1560 | if (msg->local != NULL) | |
07687790 | 1561 | if (extract_local(b, &mh, msg->local) < 1) |
664e096c HL |
1562 | /* |
1563 | * OS X exhibits odd behaviour where it appears that if a packet is | |
1564 | * sent before the receiving interface enables IP_PKTINFO, it will | |
1565 | * sometimes not have any control data returned even if the | |
1566 | * receiving interface enables IP_PKTINFO before calling recvmsg(). | |
1567 | * This appears to occur non-deterministically. Presumably, OS X | |
1568 | * handles IP_PKTINFO at the time the packet is enqueued into a | |
1569 | * socket's receive queue, rather than at the time recvmsg() is | |
1570 | * called, unlike most other operating systems. Thus (if this | |
1571 | * hypothesis is correct) there is a race between where IP_PKTINFO | |
1572 | * is enabled by the process and when the kernel's network stack | |
1573 | * queues the incoming message. | |
1574 | * | |
1575 | * We cannot return the local address if we do not have it, but this | |
1576 | * is not a caller error either, so just return a zero address | |
07687790 HL |
1577 | * structure. This is similar to how we handle Windows loopback |
1578 | * interfaces (see below). We enable this workaround for all | |
1579 | * platforms, not just Apple, as this kind of quirk in OS networking | |
1580 | * stacks seems to be common enough that failing hard if a local | |
1581 | * address is not provided appears to be too brittle. | |
664e096c | 1582 | */ |
664e096c | 1583 | BIO_ADDR_clear(msg->local); |
664e096c HL |
1584 | |
1585 | *num_processed = 1; | |
1586 | return 1; | |
1587 | ||
1588 | # elif M_METHOD == M_METHOD_RECVFROM || M_METHOD == M_METHOD_WSARECVMSG | |
1589 | # if M_METHOD == M_METHOD_WSARECVMSG | |
1590 | if (bio_WSARecvMsg != NULL) { | |
1591 | /* WSARecvMsg-based implementation for Windows. */ | |
1592 | translate_msg_win(b, &wmsg, &wbuf, control, msg); | |
1593 | ||
1594 | /* If local address was requested, it must have been enabled */ | |
1595 | if (msg[0].local != NULL && !have_local_enabled) { | |
1596 | ERR_raise(ERR_LIB_BIO, BIO_R_LOCAL_ADDR_NOT_AVAILABLE); | |
1597 | *num_processed = 0; | |
1598 | return 0; | |
1599 | } | |
1600 | ||
1601 | ret = WSARecvMsg((SOCKET)b->num, &wmsg, &num_bytes_received, NULL, NULL); | |
1602 | if (ret < 0) { | |
1603 | ERR_raise(ERR_LIB_SYS, get_last_socket_error()); | |
1604 | *num_processed = 0; | |
1605 | return 0; | |
1606 | } | |
1607 | ||
1608 | msg[0].data_len = num_bytes_received; | |
1609 | msg[0].flags = 0; | |
1610 | if (msg[0].local != NULL) | |
1611 | if (extract_local(b, &wmsg, msg[0].local) < 1) | |
1612 | /* | |
1613 | * On Windows, loopback is not a "proper" interface and it works | |
1614 | * differently; packets are essentially short-circuited and | |
1615 | * don't go through all of the normal processing. A consequence | |
1616 | * of this is that packets sent from the local machine to the | |
1617 | * local machine _will not have IP_PKTINFO_ even if the | |
1618 | * IP_PKTINFO socket option is enabled. WSARecvMsg just sets | |
1619 | * Control.len to 0 on returning. | |
1620 | * | |
1621 | * This applies regardless of whether the loopback address, | |
1622 | * 127.0.0.1 is used, or a local interface address (e.g. | |
1623 | * 192.168.1.1); in both cases IP_PKTINFO will not be present. | |
1624 | * | |
1625 | * We report this condition by setting the local BIO_ADDR's | |
1626 | * family to 0. | |
1627 | */ | |
1628 | BIO_ADDR_clear(msg[0].local); | |
1629 | ||
1630 | *num_processed = 1; | |
1631 | return 1; | |
1632 | } | |
1633 | # endif | |
1634 | ||
1635 | /* | |
1636 | * Fallback to recvfrom and receive a single message. | |
1637 | */ | |
1638 | if (msg[0].local != NULL) { | |
1639 | /* | |
1640 | * We cannot determine the local address if using recvfrom | |
1641 | * so fail in this case | |
1642 | */ | |
1643 | ERR_raise(ERR_LIB_BIO, BIO_R_LOCAL_ADDR_NOT_AVAILABLE); | |
1644 | *num_processed = 0; | |
1645 | return 0; | |
1646 | } | |
1647 | ||
1648 | slen = sizeof(*msg[0].peer); | |
1649 | ret = recvfrom(b->num, msg[0].data, | |
1650 | # if defined(OPENSSL_SYS_WINDOWS) | |
1651 | (int)msg[0].data_len, | |
1652 | # else | |
1653 | msg[0].data_len, | |
1654 | # endif | |
1655 | sysflags, | |
1656 | msg[0].peer != NULL ? &msg[0].peer->sa : NULL, | |
1657 | msg[0].peer != NULL ? &slen : NULL); | |
1658 | if (ret <= 0) { | |
1659 | ERR_raise(ERR_LIB_SYS, get_last_socket_error()); | |
1660 | return 0; | |
1661 | } | |
1662 | ||
1663 | msg[0].data_len = ret; | |
1664 | msg[0].flags = 0; | |
1665 | *num_processed = 1; | |
1666 | return 1; | |
1667 | ||
1668 | # else | |
1669 | ERR_raise(ERR_LIB_BIO, BIO_R_UNSUPPORTED_METHOD); | |
1670 | *num_processed = 0; | |
1671 | return 0; | |
1672 | # endif | |
1673 | } | |
1674 | ||
0f113f3e | 1675 | # ifndef OPENSSL_NO_SCTP |
04f6b0fd | 1676 | const BIO_METHOD *BIO_s_datagram_sctp(void) |
0f113f3e | 1677 | { |
26a7d938 | 1678 | return &methods_dgramp_sctp; |
0f113f3e | 1679 | } |
7e159e01 DSH |
1680 | |
1681 | BIO *BIO_new_dgram_sctp(int fd, int close_flag) | |
0f113f3e MC |
1682 | { |
1683 | BIO *bio; | |
1684 | int ret, optval = 20000; | |
1685 | int auth_data = 0, auth_forward = 0; | |
1686 | unsigned char *p; | |
1687 | struct sctp_authchunk auth; | |
1688 | struct sctp_authchunks *authchunks; | |
1689 | socklen_t sockopt_len; | |
1690 | # ifdef SCTP_AUTHENTICATION_EVENT | |
1691 | # ifdef SCTP_EVENT | |
1692 | struct sctp_event event; | |
1693 | # else | |
1694 | struct sctp_event_subscribe event; | |
1695 | # endif | |
1696 | # endif | |
7e159e01 | 1697 | |
0f113f3e MC |
1698 | bio = BIO_new(BIO_s_datagram_sctp()); |
1699 | if (bio == NULL) | |
26a7d938 | 1700 | return NULL; |
0f113f3e MC |
1701 | BIO_set_fd(bio, fd, close_flag); |
1702 | ||
1703 | /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */ | |
1704 | auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE; | |
1705 | ret = | |
1706 | setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth, | |
1707 | sizeof(struct sctp_authchunk)); | |
1708 | if (ret < 0) { | |
1709 | BIO_vfree(bio); | |
a150f8e1 RL |
1710 | ERR_raise_data(ERR_LIB_BIO, ERR_R_SYS_LIB, |
1711 | "Ensure SCTP AUTH chunks are enabled in kernel"); | |
26a7d938 | 1712 | return NULL; |
0f113f3e MC |
1713 | } |
1714 | auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE; | |
1715 | ret = | |
1716 | setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth, | |
1717 | sizeof(struct sctp_authchunk)); | |
1718 | if (ret < 0) { | |
1719 | BIO_vfree(bio); | |
a150f8e1 RL |
1720 | ERR_raise_data(ERR_LIB_BIO, ERR_R_SYS_LIB, |
1721 | "Ensure SCTP AUTH chunks are enabled in kernel"); | |
26a7d938 | 1722 | return NULL; |
0f113f3e MC |
1723 | } |
1724 | ||
1725 | /* | |
1726 | * Test if activation was successful. When using accept(), SCTP-AUTH has | |
1727 | * to be activated for the listening socket already, otherwise the | |
dcf88c5b MC |
1728 | * connected socket won't use it. Similarly with connect(): the socket |
1729 | * prior to connection must be activated for SCTP-AUTH | |
0f113f3e MC |
1730 | */ |
1731 | sockopt_len = (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t)); | |
b51bce94 | 1732 | authchunks = OPENSSL_zalloc(sockopt_len); |
90945fa3 | 1733 | if (authchunks == NULL) { |
918bb865 | 1734 | BIO_vfree(bio); |
26a7d938 | 1735 | return NULL; |
918bb865 | 1736 | } |
b51bce94 | 1737 | ret = getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks, |
0f113f3e | 1738 | &sockopt_len); |
0f113f3e MC |
1739 | if (ret < 0) { |
1740 | OPENSSL_free(authchunks); | |
1741 | BIO_vfree(bio); | |
26a7d938 | 1742 | return NULL; |
0f113f3e MC |
1743 | } |
1744 | ||
1745 | for (p = (unsigned char *)authchunks->gauth_chunks; | |
1746 | p < (unsigned char *)authchunks + sockopt_len; | |
1747 | p += sizeof(uint8_t)) { | |
1748 | if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE) | |
1749 | auth_data = 1; | |
1750 | if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE) | |
1751 | auth_forward = 1; | |
1752 | } | |
1753 | ||
1754 | OPENSSL_free(authchunks); | |
1755 | ||
dcf88c5b MC |
1756 | if (!auth_data || !auth_forward) { |
1757 | BIO_vfree(bio); | |
a150f8e1 RL |
1758 | ERR_raise_data(ERR_LIB_BIO, ERR_R_SYS_LIB, |
1759 | "Ensure SCTP AUTH chunks are enabled on the " | |
1760 | "underlying socket"); | |
dcf88c5b MC |
1761 | return NULL; |
1762 | } | |
0f113f3e MC |
1763 | |
1764 | # ifdef SCTP_AUTHENTICATION_EVENT | |
1765 | # ifdef SCTP_EVENT | |
16f8d4eb | 1766 | memset(&event, 0, sizeof(event)); |
0f113f3e MC |
1767 | event.se_assoc_id = 0; |
1768 | event.se_type = SCTP_AUTHENTICATION_EVENT; | |
1769 | event.se_on = 1; | |
1770 | ret = | |
1771 | setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event, | |
1772 | sizeof(struct sctp_event)); | |
1773 | if (ret < 0) { | |
1774 | BIO_vfree(bio); | |
26a7d938 | 1775 | return NULL; |
0f113f3e MC |
1776 | } |
1777 | # else | |
1778 | sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe); | |
1779 | ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len); | |
1780 | if (ret < 0) { | |
1781 | BIO_vfree(bio); | |
26a7d938 | 1782 | return NULL; |
0f113f3e MC |
1783 | } |
1784 | ||
1785 | event.sctp_authentication_event = 1; | |
1786 | ||
1787 | ret = | |
1788 | setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, | |
1789 | sizeof(struct sctp_event_subscribe)); | |
1790 | if (ret < 0) { | |
1791 | BIO_vfree(bio); | |
26a7d938 | 1792 | return NULL; |
0f113f3e MC |
1793 | } |
1794 | # endif | |
1795 | # endif | |
7e159e01 | 1796 | |
0f113f3e MC |
1797 | /* |
1798 | * Disable partial delivery by setting the min size larger than the max | |
1799 | * record size of 2^14 + 2048 + 13 | |
1800 | */ | |
1801 | ret = | |
1802 | setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval, | |
1803 | sizeof(optval)); | |
1804 | if (ret < 0) { | |
1805 | BIO_vfree(bio); | |
26a7d938 | 1806 | return NULL; |
0f113f3e MC |
1807 | } |
1808 | ||
26a7d938 | 1809 | return bio; |
0f113f3e | 1810 | } |
7e159e01 DSH |
1811 | |
1812 | int BIO_dgram_is_sctp(BIO *bio) | |
0f113f3e MC |
1813 | { |
1814 | return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP); | |
1815 | } | |
7e159e01 DSH |
1816 | |
1817 | static int dgram_sctp_new(BIO *bi) | |
0f113f3e MC |
1818 | { |
1819 | bio_dgram_sctp_data *data = NULL; | |
1820 | ||
1821 | bi->init = 0; | |
1822 | bi->num = 0; | |
e077455e | 1823 | if ((data = OPENSSL_zalloc(sizeof(*data))) == NULL) |
0f113f3e | 1824 | return 0; |
0f113f3e MC |
1825 | # ifdef SCTP_PR_SCTP_NONE |
1826 | data->prinfo.pr_policy = SCTP_PR_SCTP_NONE; | |
1827 | # endif | |
7e159e01 DSH |
1828 | bi->ptr = data; |
1829 | ||
0f113f3e | 1830 | bi->flags = 0; |
208fb891 | 1831 | return 1; |
0f113f3e | 1832 | } |
7e159e01 DSH |
1833 | |
1834 | static int dgram_sctp_free(BIO *a) | |
0f113f3e MC |
1835 | { |
1836 | bio_dgram_sctp_data *data; | |
7e159e01 | 1837 | |
0f113f3e | 1838 | if (a == NULL) |
26a7d938 | 1839 | return 0; |
0f113f3e MC |
1840 | if (!dgram_clear(a)) |
1841 | return 0; | |
7e159e01 | 1842 | |
0f113f3e | 1843 | data = (bio_dgram_sctp_data *) a->ptr; |
41b3c9ce | 1844 | if (data != NULL) |
0f113f3e | 1845 | OPENSSL_free(data); |
0f113f3e | 1846 | |
208fb891 | 1847 | return 1; |
0f113f3e | 1848 | } |
7e159e01 | 1849 | |
0f113f3e MC |
1850 | # ifdef SCTP_AUTHENTICATION_EVENT |
1851 | void dgram_sctp_handle_auth_free_key_event(BIO *b, | |
1852 | union sctp_notification *snp) | |
1853 | { | |
1854 | int ret; | |
1855 | struct sctp_authkey_event *authkeyevent = &snp->sn_auth_event; | |
1856 | ||
1857 | if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY) { | |
1858 | struct sctp_authkeyid authkeyid; | |
1859 | ||
1860 | /* delete key */ | |
1861 | authkeyid.scact_keynumber = authkeyevent->auth_keynumber; | |
1862 | ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY, | |
1863 | &authkeyid, sizeof(struct sctp_authkeyid)); | |
1864 | } | |
1865 | } | |
1866 | # endif | |
1867 | ||
1868 | static int dgram_sctp_read(BIO *b, char *out, int outl) | |
1869 | { | |
1870 | int ret = 0, n = 0, i, optval; | |
1871 | socklen_t optlen; | |
1872 | bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr; | |
0f113f3e MC |
1873 | struct msghdr msg; |
1874 | struct iovec iov; | |
1875 | struct cmsghdr *cmsg; | |
1876 | char cmsgbuf[512]; | |
1877 | ||
1878 | if (out != NULL) { | |
1879 | clear_socket_error(); | |
1880 | ||
1881 | do { | |
16f8d4eb | 1882 | memset(&data->rcvinfo, 0, sizeof(data->rcvinfo)); |
0f113f3e MC |
1883 | iov.iov_base = out; |
1884 | iov.iov_len = outl; | |
1885 | msg.msg_name = NULL; | |
1886 | msg.msg_namelen = 0; | |
1887 | msg.msg_iov = &iov; | |
1888 | msg.msg_iovlen = 1; | |
1889 | msg.msg_control = cmsgbuf; | |
1890 | msg.msg_controllen = 512; | |
1891 | msg.msg_flags = 0; | |
1892 | n = recvmsg(b->num, &msg, 0); | |
1893 | ||
1894 | if (n <= 0) { | |
1895 | if (n < 0) | |
1896 | ret = n; | |
1897 | break; | |
1898 | } | |
1899 | ||
1900 | if (msg.msg_controllen > 0) { | |
1901 | for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; | |
1902 | cmsg = CMSG_NXTHDR(&msg, cmsg)) { | |
1903 | if (cmsg->cmsg_level != IPPROTO_SCTP) | |
1904 | continue; | |
1905 | # ifdef SCTP_RCVINFO | |
1906 | if (cmsg->cmsg_type == SCTP_RCVINFO) { | |
1907 | struct sctp_rcvinfo *rcvinfo; | |
1908 | ||
1909 | rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg); | |
1910 | data->rcvinfo.rcv_sid = rcvinfo->rcv_sid; | |
1911 | data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn; | |
1912 | data->rcvinfo.rcv_flags = rcvinfo->rcv_flags; | |
1913 | data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid; | |
1914 | data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn; | |
1915 | data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn; | |
1916 | data->rcvinfo.rcv_context = rcvinfo->rcv_context; | |
1917 | } | |
1918 | # endif | |
1919 | # ifdef SCTP_SNDRCV | |
1920 | if (cmsg->cmsg_type == SCTP_SNDRCV) { | |
1921 | struct sctp_sndrcvinfo *sndrcvinfo; | |
1922 | ||
1923 | sndrcvinfo = | |
1924 | (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg); | |
1925 | data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream; | |
1926 | data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn; | |
1927 | data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags; | |
1928 | data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid; | |
1929 | data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn; | |
1930 | data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn; | |
1931 | data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context; | |
1932 | } | |
1933 | # endif | |
1934 | } | |
1935 | } | |
1936 | ||
1937 | if (msg.msg_flags & MSG_NOTIFICATION) { | |
287e1a7e PS |
1938 | union sctp_notification snp; |
1939 | ||
1940 | memcpy(&snp, out, sizeof(snp)); | |
1941 | if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) { | |
0f113f3e MC |
1942 | # ifdef SCTP_EVENT |
1943 | struct sctp_event event; | |
1944 | # else | |
1945 | struct sctp_event_subscribe event; | |
1946 | socklen_t eventsize; | |
1947 | # endif | |
0f113f3e MC |
1948 | |
1949 | /* disable sender dry event */ | |
1950 | # ifdef SCTP_EVENT | |
16f8d4eb | 1951 | memset(&event, 0, sizeof(event)); |
0f113f3e MC |
1952 | event.se_assoc_id = 0; |
1953 | event.se_type = SCTP_SENDER_DRY_EVENT; | |
1954 | event.se_on = 0; | |
1955 | i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, | |
1956 | sizeof(struct sctp_event)); | |
1957 | if (i < 0) { | |
1958 | ret = i; | |
1959 | break; | |
1960 | } | |
1961 | # else | |
1962 | eventsize = sizeof(struct sctp_event_subscribe); | |
1963 | i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, | |
1964 | &eventsize); | |
1965 | if (i < 0) { | |
1966 | ret = i; | |
1967 | break; | |
1968 | } | |
1969 | ||
1970 | event.sctp_sender_dry_event = 0; | |
1971 | ||
1972 | i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, | |
1973 | sizeof(struct sctp_event_subscribe)); | |
1974 | if (i < 0) { | |
1975 | ret = i; | |
1976 | break; | |
1977 | } | |
1978 | # endif | |
1979 | } | |
1980 | # ifdef SCTP_AUTHENTICATION_EVENT | |
287e1a7e PS |
1981 | if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT) |
1982 | dgram_sctp_handle_auth_free_key_event(b, &snp); | |
0f113f3e MC |
1983 | # endif |
1984 | ||
1985 | if (data->handle_notifications != NULL) | |
1986 | data->handle_notifications(b, data->notification_context, | |
1987 | (void *)out); | |
1988 | ||
287e1a7e | 1989 | memset(&snp, 0, sizeof(snp)); |
0f113f3e | 1990 | memset(out, 0, outl); |
287e1a7e | 1991 | } else { |
0f113f3e | 1992 | ret += n; |
287e1a7e | 1993 | } |
0f113f3e MC |
1994 | } |
1995 | while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR) | |
1996 | && (ret < outl)); | |
1997 | ||
1998 | if (ret > 0 && !(msg.msg_flags & MSG_EOR)) { | |
1999 | /* Partial message read, this should never happen! */ | |
2000 | ||
2001 | /* | |
2002 | * The buffer was too small, this means the peer sent a message | |
2003 | * that was larger than allowed. | |
2004 | */ | |
2005 | if (ret == outl) | |
2006 | return -1; | |
2007 | ||
2008 | /* | |
2009 | * Test if socket buffer can handle max record size (2^14 + 2048 | |
2010 | * + 13) | |
2011 | */ | |
2012 | optlen = (socklen_t) sizeof(int); | |
2013 | ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen); | |
2014 | if (ret >= 0) | |
2015 | OPENSSL_assert(optval >= 18445); | |
2016 | ||
2017 | /* | |
2018 | * Test if SCTP doesn't partially deliver below max record size | |
2019 | * (2^14 + 2048 + 13) | |
2020 | */ | |
2021 | optlen = (socklen_t) sizeof(int); | |
2022 | ret = | |
2023 | getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, | |
2024 | &optval, &optlen); | |
2025 | if (ret >= 0) | |
2026 | OPENSSL_assert(optval >= 18445); | |
2027 | ||
2028 | /* | |
2029 | * Partially delivered notification??? Probably a bug.... | |
2030 | */ | |
2031 | OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION)); | |
2032 | ||
2033 | /* | |
2034 | * Everything seems ok till now, so it's most likely a message | |
2035 | * dropped by PR-SCTP. | |
2036 | */ | |
2037 | memset(out, 0, outl); | |
2038 | BIO_set_retry_read(b); | |
2039 | return -1; | |
2040 | } | |
2041 | ||
2042 | BIO_clear_retry_flags(b); | |
2043 | if (ret < 0) { | |
2044 | if (BIO_dgram_should_retry(ret)) { | |
2045 | BIO_set_retry_read(b); | |
2046 | data->_errno = get_last_socket_error(); | |
2047 | } | |
2048 | } | |
2049 | ||
2050 | /* Test if peer uses SCTP-AUTH before continuing */ | |
2051 | if (!data->peer_auth_tested) { | |
2052 | int ii, auth_data = 0, auth_forward = 0; | |
2053 | unsigned char *p; | |
2054 | struct sctp_authchunks *authchunks; | |
2055 | ||
2056 | optlen = | |
2057 | (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t)); | |
2058 | authchunks = OPENSSL_malloc(optlen); | |
e077455e | 2059 | if (authchunks == NULL) |
918bb865 | 2060 | return -1; |
0f113f3e MC |
2061 | memset(authchunks, 0, optlen); |
2062 | ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS, | |
2063 | authchunks, &optlen); | |
2064 | ||
2065 | if (ii >= 0) | |
2066 | for (p = (unsigned char *)authchunks->gauth_chunks; | |
2067 | p < (unsigned char *)authchunks + optlen; | |
2068 | p += sizeof(uint8_t)) { | |
2069 | if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE) | |
2070 | auth_data = 1; | |
2071 | if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE) | |
2072 | auth_forward = 1; | |
2073 | } | |
2074 | ||
2075 | OPENSSL_free(authchunks); | |
2076 | ||
2077 | if (!auth_data || !auth_forward) { | |
9311d0c4 | 2078 | ERR_raise(ERR_LIB_BIO, BIO_R_CONNECT_ERROR); |
0f113f3e MC |
2079 | return -1; |
2080 | } | |
2081 | ||
2082 | data->peer_auth_tested = 1; | |
2083 | } | |
2084 | } | |
26a7d938 | 2085 | return ret; |
0f113f3e | 2086 | } |
7e159e01 | 2087 | |
7f098cb4 KR |
2088 | /* |
2089 | * dgram_sctp_write - send message on SCTP socket | |
2090 | * @b: BIO to write to | |
2091 | * @in: data to send | |
2092 | * @inl: amount of bytes in @in to send | |
2093 | * | |
2094 | * Returns -1 on error or the sent amount of bytes on success | |
2095 | */ | |
7e159e01 | 2096 | static int dgram_sctp_write(BIO *b, const char *in, int inl) |
0f113f3e MC |
2097 | { |
2098 | int ret; | |
2099 | bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr; | |
2100 | struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo); | |
2101 | struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo); | |
2102 | struct bio_dgram_sctp_sndinfo handshake_sinfo; | |
2103 | struct iovec iov[1]; | |
2104 | struct msghdr msg; | |
2105 | struct cmsghdr *cmsg; | |
2106 | # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO) | |
2107 | char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) + | |
2108 | CMSG_SPACE(sizeof(struct sctp_prinfo))]; | |
2109 | struct sctp_sndinfo *sndinfo; | |
2110 | struct sctp_prinfo *prinfo; | |
2111 | # else | |
2112 | char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))]; | |
2113 | struct sctp_sndrcvinfo *sndrcvinfo; | |
2114 | # endif | |
7e159e01 | 2115 | |
0f113f3e | 2116 | clear_socket_error(); |
7e159e01 | 2117 | |
0f113f3e MC |
2118 | /* |
2119 | * If we're send anything else than application data, disable all user | |
2120 | * parameters and flags. | |
2121 | */ | |
2122 | if (in[0] != 23) { | |
16f8d4eb | 2123 | memset(&handshake_sinfo, 0, sizeof(handshake_sinfo)); |
0f113f3e MC |
2124 | # ifdef SCTP_SACK_IMMEDIATELY |
2125 | handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY; | |
2126 | # endif | |
2127 | sinfo = &handshake_sinfo; | |
2128 | } | |
2129 | ||
41b3c9ce | 2130 | /* We can only send a shutdown alert if the socket is dry */ |
03a1c850 KR |
2131 | if (data->save_shutdown) { |
2132 | ret = BIO_dgram_sctp_wait_for_dry(b); | |
41b3c9ce | 2133 | if (ret < 0) |
918bb865 | 2134 | return -1; |
03a1c850 | 2135 | if (ret == 0) { |
41b3c9ce MC |
2136 | BIO_clear_retry_flags(b); |
2137 | BIO_set_retry_write(b); | |
2138 | return -1; | |
03a1c850 | 2139 | } |
0f113f3e MC |
2140 | } |
2141 | ||
2142 | iov[0].iov_base = (char *)in; | |
2143 | iov[0].iov_len = inl; | |
2144 | msg.msg_name = NULL; | |
2145 | msg.msg_namelen = 0; | |
2146 | msg.msg_iov = iov; | |
2147 | msg.msg_iovlen = 1; | |
2148 | msg.msg_control = (caddr_t) cmsgbuf; | |
2149 | msg.msg_controllen = 0; | |
2150 | msg.msg_flags = 0; | |
2151 | # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO) | |
2152 | cmsg = (struct cmsghdr *)cmsgbuf; | |
2153 | cmsg->cmsg_level = IPPROTO_SCTP; | |
2154 | cmsg->cmsg_type = SCTP_SNDINFO; | |
2155 | cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo)); | |
2156 | sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg); | |
16f8d4eb | 2157 | memset(sndinfo, 0, sizeof(*sndinfo)); |
0f113f3e MC |
2158 | sndinfo->snd_sid = sinfo->snd_sid; |
2159 | sndinfo->snd_flags = sinfo->snd_flags; | |
2160 | sndinfo->snd_ppid = sinfo->snd_ppid; | |
2161 | sndinfo->snd_context = sinfo->snd_context; | |
2162 | msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo)); | |
2163 | ||
2164 | cmsg = | |
2165 | (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))]; | |
2166 | cmsg->cmsg_level = IPPROTO_SCTP; | |
2167 | cmsg->cmsg_type = SCTP_PRINFO; | |
2168 | cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo)); | |
2169 | prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg); | |
16f8d4eb | 2170 | memset(prinfo, 0, sizeof(*prinfo)); |
0f113f3e MC |
2171 | prinfo->pr_policy = pinfo->pr_policy; |
2172 | prinfo->pr_value = pinfo->pr_value; | |
2173 | msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo)); | |
2174 | # else | |
2175 | cmsg = (struct cmsghdr *)cmsgbuf; | |
2176 | cmsg->cmsg_level = IPPROTO_SCTP; | |
2177 | cmsg->cmsg_type = SCTP_SNDRCV; | |
2178 | cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo)); | |
2179 | sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg); | |
16f8d4eb | 2180 | memset(sndrcvinfo, 0, sizeof(*sndrcvinfo)); |
0f113f3e MC |
2181 | sndrcvinfo->sinfo_stream = sinfo->snd_sid; |
2182 | sndrcvinfo->sinfo_flags = sinfo->snd_flags; | |
2183 | # ifdef __FreeBSD__ | |
2184 | sndrcvinfo->sinfo_flags |= pinfo->pr_policy; | |
2185 | # endif | |
2186 | sndrcvinfo->sinfo_ppid = sinfo->snd_ppid; | |
2187 | sndrcvinfo->sinfo_context = sinfo->snd_context; | |
2188 | sndrcvinfo->sinfo_timetolive = pinfo->pr_value; | |
2189 | msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo)); | |
2190 | # endif | |
7e159e01 | 2191 | |
0f113f3e | 2192 | ret = sendmsg(b->num, &msg, 0); |
7e159e01 | 2193 | |
0f113f3e MC |
2194 | BIO_clear_retry_flags(b); |
2195 | if (ret <= 0) { | |
2196 | if (BIO_dgram_should_retry(ret)) { | |
2197 | BIO_set_retry_write(b); | |
2198 | data->_errno = get_last_socket_error(); | |
2199 | } | |
2200 | } | |
26a7d938 | 2201 | return ret; |
0f113f3e | 2202 | } |
7e159e01 DSH |
2203 | |
2204 | static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr) | |
0f113f3e MC |
2205 | { |
2206 | long ret = 1; | |
2207 | bio_dgram_sctp_data *data = NULL; | |
2208 | socklen_t sockopt_len = 0; | |
2209 | struct sctp_authkeyid authkeyid; | |
2210 | struct sctp_authkey *authkey = NULL; | |
2211 | ||
2212 | data = (bio_dgram_sctp_data *) b->ptr; | |
2213 | ||
2214 | switch (cmd) { | |
2215 | case BIO_CTRL_DGRAM_QUERY_MTU: | |
2216 | /* | |
2217 | * Set to maximum (2^14) and ignore user input to enable transport | |
2218 | * protocol fragmentation. Returns always 2^14. | |
2219 | */ | |
2220 | data->mtu = 16384; | |
2221 | ret = data->mtu; | |
2222 | break; | |
2223 | case BIO_CTRL_DGRAM_SET_MTU: | |
2224 | /* | |
2225 | * Set to maximum (2^14) and ignore input to enable transport | |
2226 | * protocol fragmentation. Returns always 2^14. | |
2227 | */ | |
2228 | data->mtu = 16384; | |
2229 | ret = data->mtu; | |
2230 | break; | |
2231 | case BIO_CTRL_DGRAM_SET_CONNECTED: | |
2232 | case BIO_CTRL_DGRAM_CONNECT: | |
2233 | /* Returns always -1. */ | |
2234 | ret = -1; | |
2235 | break; | |
2236 | case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT: | |
2237 | /* | |
2238 | * SCTP doesn't need the DTLS timer Returns always 1. | |
2239 | */ | |
2240 | break; | |
2241 | case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD: | |
2242 | /* | |
2243 | * We allow transport protocol fragmentation so this is irrelevant | |
2244 | */ | |
2245 | ret = 0; | |
2246 | break; | |
2247 | case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE: | |
2248 | if (num > 0) | |
2249 | data->in_handshake = 1; | |
2250 | else | |
2251 | data->in_handshake = 0; | |
2252 | ||
2253 | ret = | |
2254 | setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY, | |
2255 | &data->in_handshake, sizeof(int)); | |
2256 | break; | |
2257 | case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY: | |
2258 | /* | |
2259 | * New shared key for SCTP AUTH. Returns 0 on success, -1 otherwise. | |
2260 | */ | |
2261 | ||
2262 | /* Get active key */ | |
2263 | sockopt_len = sizeof(struct sctp_authkeyid); | |
2264 | ret = | |
2265 | getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, | |
2266 | &sockopt_len); | |
2267 | if (ret < 0) | |
2268 | break; | |
2269 | ||
2270 | /* Add new key */ | |
2271 | sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t); | |
2272 | authkey = OPENSSL_malloc(sockopt_len); | |
2273 | if (authkey == NULL) { | |
2274 | ret = -1; | |
2275 | break; | |
2276 | } | |
16f8d4eb | 2277 | memset(authkey, 0, sockopt_len); |
0f113f3e MC |
2278 | authkey->sca_keynumber = authkeyid.scact_keynumber + 1; |
2279 | # ifndef __FreeBSD__ | |
2280 | /* | |
2281 | * This field is missing in FreeBSD 8.2 and earlier, and FreeBSD 8.3 | |
2282 | * and higher work without it. | |
2283 | */ | |
2284 | authkey->sca_keylength = 64; | |
2285 | # endif | |
2286 | memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t)); | |
2287 | ||
2288 | ret = | |
2289 | setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey, | |
2290 | sockopt_len); | |
2291 | OPENSSL_free(authkey); | |
2292 | authkey = NULL; | |
2293 | if (ret < 0) | |
2294 | break; | |
2295 | ||
2296 | /* Reset active key */ | |
2297 | ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, | |
2298 | &authkeyid, sizeof(struct sctp_authkeyid)); | |
2299 | if (ret < 0) | |
2300 | break; | |
2301 | ||
2302 | break; | |
2303 | case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY: | |
2304 | /* Returns 0 on success, -1 otherwise. */ | |
2305 | ||
2306 | /* Get active key */ | |
2307 | sockopt_len = sizeof(struct sctp_authkeyid); | |
2308 | ret = | |
2309 | getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, | |
2310 | &sockopt_len); | |
2311 | if (ret < 0) | |
2312 | break; | |
2313 | ||
2314 | /* Set active key */ | |
2315 | authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1; | |
2316 | ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, | |
2317 | &authkeyid, sizeof(struct sctp_authkeyid)); | |
2318 | if (ret < 0) | |
2319 | break; | |
2320 | ||
2321 | /* | |
2322 | * CCS has been sent, so remember that and fall through to check if | |
2323 | * we need to deactivate an old key | |
2324 | */ | |
2325 | data->ccs_sent = 1; | |
14716754 | 2326 | /* fall-through */ |
0f113f3e MC |
2327 | |
2328 | case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD: | |
2329 | /* Returns 0 on success, -1 otherwise. */ | |
2330 | ||
2331 | /* | |
2332 | * Has this command really been called or is this just a | |
2333 | * fall-through? | |
2334 | */ | |
2335 | if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD) | |
2336 | data->ccs_rcvd = 1; | |
2337 | ||
2338 | /* | |
2339 | * CSS has been both, received and sent, so deactivate an old key | |
2340 | */ | |
2341 | if (data->ccs_rcvd == 1 && data->ccs_sent == 1) { | |
2342 | /* Get active key */ | |
2343 | sockopt_len = sizeof(struct sctp_authkeyid); | |
2344 | ret = | |
2345 | getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, | |
2346 | &authkeyid, &sockopt_len); | |
2347 | if (ret < 0) | |
2348 | break; | |
2349 | ||
2350 | /* | |
2351 | * Deactivate key or delete second last key if | |
2352 | * SCTP_AUTHENTICATION_EVENT is not available. | |
2353 | */ | |
2354 | authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1; | |
2355 | # ifdef SCTP_AUTH_DEACTIVATE_KEY | |
2356 | sockopt_len = sizeof(struct sctp_authkeyid); | |
2357 | ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY, | |
2358 | &authkeyid, sockopt_len); | |
2359 | if (ret < 0) | |
2360 | break; | |
2361 | # endif | |
2362 | # ifndef SCTP_AUTHENTICATION_EVENT | |
2363 | if (authkeyid.scact_keynumber > 0) { | |
2364 | authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1; | |
2365 | ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY, | |
2366 | &authkeyid, sizeof(struct sctp_authkeyid)); | |
2367 | if (ret < 0) | |
2368 | break; | |
2369 | } | |
2370 | # endif | |
7e159e01 | 2371 | |
0f113f3e MC |
2372 | data->ccs_rcvd = 0; |
2373 | data->ccs_sent = 0; | |
2374 | } | |
2375 | break; | |
2376 | case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO: | |
2377 | /* Returns the size of the copied struct. */ | |
2378 | if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo)) | |
2379 | num = sizeof(struct bio_dgram_sctp_sndinfo); | |
2380 | ||
2381 | memcpy(ptr, &(data->sndinfo), num); | |
2382 | ret = num; | |
2383 | break; | |
2384 | case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO: | |
2385 | /* Returns the size of the copied struct. */ | |
2386 | if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo)) | |
2387 | num = sizeof(struct bio_dgram_sctp_sndinfo); | |
2388 | ||
2389 | memcpy(&(data->sndinfo), ptr, num); | |
2390 | break; | |
2391 | case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO: | |
2392 | /* Returns the size of the copied struct. */ | |
2393 | if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo)) | |
2394 | num = sizeof(struct bio_dgram_sctp_rcvinfo); | |
2395 | ||
2396 | memcpy(ptr, &data->rcvinfo, num); | |
2397 | ||
2398 | ret = num; | |
2399 | break; | |
2400 | case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO: | |
2401 | /* Returns the size of the copied struct. */ | |
2402 | if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo)) | |
2403 | num = sizeof(struct bio_dgram_sctp_rcvinfo); | |
2404 | ||
2405 | memcpy(&(data->rcvinfo), ptr, num); | |
2406 | break; | |
2407 | case BIO_CTRL_DGRAM_SCTP_GET_PRINFO: | |
2408 | /* Returns the size of the copied struct. */ | |
2409 | if (num > (long)sizeof(struct bio_dgram_sctp_prinfo)) | |
2410 | num = sizeof(struct bio_dgram_sctp_prinfo); | |
2411 | ||
2412 | memcpy(ptr, &(data->prinfo), num); | |
2413 | ret = num; | |
2414 | break; | |
2415 | case BIO_CTRL_DGRAM_SCTP_SET_PRINFO: | |
2416 | /* Returns the size of the copied struct. */ | |
2417 | if (num > (long)sizeof(struct bio_dgram_sctp_prinfo)) | |
2418 | num = sizeof(struct bio_dgram_sctp_prinfo); | |
2419 | ||
2420 | memcpy(&(data->prinfo), ptr, num); | |
2421 | break; | |
2422 | case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN: | |
2423 | /* Returns always 1. */ | |
2424 | if (num > 0) | |
2425 | data->save_shutdown = 1; | |
2426 | else | |
2427 | data->save_shutdown = 0; | |
2428 | break; | |
c8edb04f | 2429 | case BIO_CTRL_DGRAM_SCTP_WAIT_FOR_DRY: |
2430 | return dgram_sctp_wait_for_dry(b); | |
2431 | case BIO_CTRL_DGRAM_SCTP_MSG_WAITING: | |
2432 | return dgram_sctp_msg_waiting(b); | |
0f113f3e MC |
2433 | |
2434 | default: | |
2435 | /* | |
2436 | * Pass to default ctrl function to process SCTP unspecific commands | |
2437 | */ | |
2438 | ret = dgram_ctrl(b, cmd, num, ptr); | |
2439 | break; | |
2440 | } | |
26a7d938 | 2441 | return ret; |
0f113f3e | 2442 | } |
7e159e01 DSH |
2443 | |
2444 | int BIO_dgram_sctp_notification_cb(BIO *b, | |
c8edb04f | 2445 | BIO_dgram_sctp_notification_handler_fn handle_notifications, |
2446 | void *context) | |
0f113f3e MC |
2447 | { |
2448 | bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr; | |
7e159e01 | 2449 | |
0f113f3e MC |
2450 | if (handle_notifications != NULL) { |
2451 | data->handle_notifications = handle_notifications; | |
2452 | data->notification_context = context; | |
2453 | } else | |
2454 | return -1; | |
7e159e01 | 2455 | |
0f113f3e MC |
2456 | return 0; |
2457 | } | |
7e159e01 | 2458 | |
03a1c850 KR |
2459 | /* |
2460 | * BIO_dgram_sctp_wait_for_dry - Wait for SCTP SENDER_DRY event | |
2461 | * @b: The BIO to check for the dry event | |
2462 | * | |
2463 | * Wait until the peer confirms all packets have been received, and so that | |
2464 | * our kernel doesn't have anything to send anymore. This is only received by | |
2465 | * the peer's kernel, not the application. | |
2466 | * | |
2467 | * Returns: | |
2468 | * -1 on error | |
2469 | * 0 when not dry yet | |
2470 | * 1 when dry | |
2471 | */ | |
7e159e01 | 2472 | int BIO_dgram_sctp_wait_for_dry(BIO *b) |
c8edb04f | 2473 | { |
2474 | return (int)BIO_ctrl(b, BIO_CTRL_DGRAM_SCTP_WAIT_FOR_DRY, 0, NULL); | |
2475 | } | |
2476 | ||
2477 | static int dgram_sctp_wait_for_dry(BIO *b) | |
7e159e01 | 2478 | { |
0f113f3e | 2479 | int is_dry = 0; |
4eacfade BL |
2480 | int sockflags = 0; |
2481 | int n, ret; | |
0f113f3e MC |
2482 | union sctp_notification snp; |
2483 | struct msghdr msg; | |
2484 | struct iovec iov; | |
2485 | # ifdef SCTP_EVENT | |
2486 | struct sctp_event event; | |
2487 | # else | |
2488 | struct sctp_event_subscribe event; | |
2489 | socklen_t eventsize; | |
2490 | # endif | |
2491 | bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr; | |
2492 | ||
2493 | /* set sender dry event */ | |
2494 | # ifdef SCTP_EVENT | |
16f8d4eb | 2495 | memset(&event, 0, sizeof(event)); |
0f113f3e MC |
2496 | event.se_assoc_id = 0; |
2497 | event.se_type = SCTP_SENDER_DRY_EVENT; | |
2498 | event.se_on = 1; | |
2499 | ret = | |
2500 | setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, | |
2501 | sizeof(struct sctp_event)); | |
2502 | # else | |
2503 | eventsize = sizeof(struct sctp_event_subscribe); | |
2504 | ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize); | |
2505 | if (ret < 0) | |
2506 | return -1; | |
2507 | ||
2508 | event.sctp_sender_dry_event = 1; | |
2509 | ||
2510 | ret = | |
2511 | setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, | |
2512 | sizeof(struct sctp_event_subscribe)); | |
2513 | # endif | |
2514 | if (ret < 0) | |
2515 | return -1; | |
2516 | ||
2517 | /* peek for notification */ | |
16f8d4eb | 2518 | memset(&snp, 0, sizeof(snp)); |
0f113f3e MC |
2519 | iov.iov_base = (char *)&snp; |
2520 | iov.iov_len = sizeof(union sctp_notification); | |
2521 | msg.msg_name = NULL; | |
2522 | msg.msg_namelen = 0; | |
2523 | msg.msg_iov = &iov; | |
2524 | msg.msg_iovlen = 1; | |
2525 | msg.msg_control = NULL; | |
2526 | msg.msg_controllen = 0; | |
2527 | msg.msg_flags = 0; | |
2528 | ||
2529 | n = recvmsg(b->num, &msg, MSG_PEEK); | |
2530 | if (n <= 0) { | |
2531 | if ((n < 0) && (get_last_socket_error() != EAGAIN) | |
2532 | && (get_last_socket_error() != EWOULDBLOCK)) | |
2533 | return -1; | |
2534 | else | |
2535 | return 0; | |
2536 | } | |
2537 | ||
2538 | /* if we find a notification, process it and try again if necessary */ | |
2539 | while (msg.msg_flags & MSG_NOTIFICATION) { | |
16f8d4eb | 2540 | memset(&snp, 0, sizeof(snp)); |
0f113f3e MC |
2541 | iov.iov_base = (char *)&snp; |
2542 | iov.iov_len = sizeof(union sctp_notification); | |
2543 | msg.msg_name = NULL; | |
2544 | msg.msg_namelen = 0; | |
2545 | msg.msg_iov = &iov; | |
2546 | msg.msg_iovlen = 1; | |
2547 | msg.msg_control = NULL; | |
2548 | msg.msg_controllen = 0; | |
2549 | msg.msg_flags = 0; | |
2550 | ||
2551 | n = recvmsg(b->num, &msg, 0); | |
2552 | if (n <= 0) { | |
2553 | if ((n < 0) && (get_last_socket_error() != EAGAIN) | |
2554 | && (get_last_socket_error() != EWOULDBLOCK)) | |
2555 | return -1; | |
2556 | else | |
2557 | return is_dry; | |
2558 | } | |
2559 | ||
2560 | if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) { | |
2561 | is_dry = 1; | |
2562 | ||
2563 | /* disable sender dry event */ | |
2564 | # ifdef SCTP_EVENT | |
16f8d4eb | 2565 | memset(&event, 0, sizeof(event)); |
0f113f3e MC |
2566 | event.se_assoc_id = 0; |
2567 | event.se_type = SCTP_SENDER_DRY_EVENT; | |
2568 | event.se_on = 0; | |
2569 | ret = | |
2570 | setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, | |
2571 | sizeof(struct sctp_event)); | |
2572 | # else | |
2573 | eventsize = (socklen_t) sizeof(struct sctp_event_subscribe); | |
2574 | ret = | |
2575 | getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, | |
2576 | &eventsize); | |
2577 | if (ret < 0) | |
2578 | return -1; | |
2579 | ||
2580 | event.sctp_sender_dry_event = 0; | |
2581 | ||
2582 | ret = | |
2583 | setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, | |
2584 | sizeof(struct sctp_event_subscribe)); | |
2585 | # endif | |
2586 | if (ret < 0) | |
2587 | return -1; | |
2588 | } | |
2589 | # ifdef SCTP_AUTHENTICATION_EVENT | |
2590 | if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT) | |
2591 | dgram_sctp_handle_auth_free_key_event(b, &snp); | |
2592 | # endif | |
7e159e01 | 2593 | |
0f113f3e MC |
2594 | if (data->handle_notifications != NULL) |
2595 | data->handle_notifications(b, data->notification_context, | |
2596 | (void *)&snp); | |
2597 | ||
2598 | /* found notification, peek again */ | |
16f8d4eb | 2599 | memset(&snp, 0, sizeof(snp)); |
0f113f3e MC |
2600 | iov.iov_base = (char *)&snp; |
2601 | iov.iov_len = sizeof(union sctp_notification); | |
2602 | msg.msg_name = NULL; | |
2603 | msg.msg_namelen = 0; | |
2604 | msg.msg_iov = &iov; | |
2605 | msg.msg_iovlen = 1; | |
2606 | msg.msg_control = NULL; | |
2607 | msg.msg_controllen = 0; | |
2608 | msg.msg_flags = 0; | |
2609 | ||
2610 | /* if we have seen the dry already, don't wait */ | |
2611 | if (is_dry) { | |
2612 | sockflags = fcntl(b->num, F_GETFL, 0); | |
2613 | fcntl(b->num, F_SETFL, O_NONBLOCK); | |
2614 | } | |
2615 | ||
2616 | n = recvmsg(b->num, &msg, MSG_PEEK); | |
2617 | ||
2618 | if (is_dry) { | |
2619 | fcntl(b->num, F_SETFL, sockflags); | |
2620 | } | |
2621 | ||
2622 | if (n <= 0) { | |
2623 | if ((n < 0) && (get_last_socket_error() != EAGAIN) | |
2624 | && (get_last_socket_error() != EWOULDBLOCK)) | |
2625 | return -1; | |
2626 | else | |
2627 | return is_dry; | |
2628 | } | |
2629 | } | |
2630 | ||
2631 | /* read anything else */ | |
2632 | return is_dry; | |
7e159e01 DSH |
2633 | } |
2634 | ||
2635 | int BIO_dgram_sctp_msg_waiting(BIO *b) | |
c8edb04f | 2636 | { |
2637 | return (int)BIO_ctrl(b, BIO_CTRL_DGRAM_SCTP_MSG_WAITING, 0, NULL); | |
2638 | } | |
2639 | ||
2640 | static int dgram_sctp_msg_waiting(BIO *b) | |
0f113f3e MC |
2641 | { |
2642 | int n, sockflags; | |
2643 | union sctp_notification snp; | |
2644 | struct msghdr msg; | |
2645 | struct iovec iov; | |
2646 | bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr; | |
2647 | ||
2648 | /* Check if there are any messages waiting to be read */ | |
2649 | do { | |
16f8d4eb | 2650 | memset(&snp, 0, sizeof(snp)); |
0f113f3e MC |
2651 | iov.iov_base = (char *)&snp; |
2652 | iov.iov_len = sizeof(union sctp_notification); | |
2653 | msg.msg_name = NULL; | |
2654 | msg.msg_namelen = 0; | |
2655 | msg.msg_iov = &iov; | |
2656 | msg.msg_iovlen = 1; | |
2657 | msg.msg_control = NULL; | |
2658 | msg.msg_controllen = 0; | |
2659 | msg.msg_flags = 0; | |
2660 | ||
2661 | sockflags = fcntl(b->num, F_GETFL, 0); | |
2662 | fcntl(b->num, F_SETFL, O_NONBLOCK); | |
2663 | n = recvmsg(b->num, &msg, MSG_PEEK); | |
2664 | fcntl(b->num, F_SETFL, sockflags); | |
2665 | ||
2666 | /* if notification, process and try again */ | |
2667 | if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)) { | |
2668 | # ifdef SCTP_AUTHENTICATION_EVENT | |
2669 | if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT) | |
2670 | dgram_sctp_handle_auth_free_key_event(b, &snp); | |
2671 | # endif | |
7e159e01 | 2672 | |
16f8d4eb | 2673 | memset(&snp, 0, sizeof(snp)); |
0f113f3e MC |
2674 | iov.iov_base = (char *)&snp; |
2675 | iov.iov_len = sizeof(union sctp_notification); | |
2676 | msg.msg_name = NULL; | |
2677 | msg.msg_namelen = 0; | |
2678 | msg.msg_iov = &iov; | |
2679 | msg.msg_iovlen = 1; | |
2680 | msg.msg_control = NULL; | |
2681 | msg.msg_controllen = 0; | |
2682 | msg.msg_flags = 0; | |
2683 | n = recvmsg(b->num, &msg, 0); | |
2684 | ||
2685 | if (data->handle_notifications != NULL) | |
2686 | data->handle_notifications(b, data->notification_context, | |
2687 | (void *)&snp); | |
2688 | } | |
2689 | ||
2690 | } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)); | |
2691 | ||
2692 | /* Return 1 if there is a message to be read, return 0 otherwise. */ | |
2693 | if (n > 0) | |
2694 | return 1; | |
2695 | else | |
2696 | return 0; | |
2697 | } | |
7e159e01 DSH |
2698 | |
2699 | static int dgram_sctp_puts(BIO *bp, const char *str) | |
0f113f3e MC |
2700 | { |
2701 | int n, ret; | |
7e159e01 | 2702 | |
0f113f3e MC |
2703 | n = strlen(str); |
2704 | ret = dgram_sctp_write(bp, str, n); | |
26a7d938 | 2705 | return ret; |
0f113f3e MC |
2706 | } |
2707 | # endif | |
7e159e01 | 2708 | |
b3e72fc3 | 2709 | static int BIO_dgram_should_retry(int i) |
0f113f3e MC |
2710 | { |
2711 | int err; | |
36d16f8e | 2712 | |
0f113f3e MC |
2713 | if ((i == 0) || (i == -1)) { |
2714 | err = get_last_socket_error(); | |
36d16f8e | 2715 | |
0f113f3e MC |
2716 | # if defined(OPENSSL_SYS_WINDOWS) |
2717 | /* | |
2718 | * If the socket return value (i) is -1 and err is unexpectedly 0 at | |
2719 | * this point, the error code was overwritten by another system call | |
2720 | * before this error handling is called. | |
2721 | */ | |
36d16f8e BL |
2722 | # endif |
2723 | ||
26a7d938 | 2724 | return BIO_dgram_non_fatal_error(err); |
0f113f3e | 2725 | } |
26a7d938 | 2726 | return 0; |
0f113f3e MC |
2727 | } |
2728 | ||
2729 | int BIO_dgram_non_fatal_error(int err) | |
2730 | { | |
2731 | switch (err) { | |
2732 | # if defined(OPENSSL_SYS_WINDOWS) | |
2733 | # if defined(WSAEWOULDBLOCK) | |
2734 | case WSAEWOULDBLOCK: | |
2735 | # endif | |
36d16f8e | 2736 | # endif |
36d16f8e | 2737 | |
0f113f3e MC |
2738 | # ifdef EWOULDBLOCK |
2739 | # ifdef WSAEWOULDBLOCK | |
2740 | # if WSAEWOULDBLOCK != EWOULDBLOCK | |
2741 | case EWOULDBLOCK: | |
2742 | # endif | |
2743 | # else | |
2744 | case EWOULDBLOCK: | |
36d16f8e | 2745 | # endif |
36d16f8e | 2746 | # endif |
36d16f8e | 2747 | |
0f113f3e MC |
2748 | # ifdef EINTR |
2749 | case EINTR: | |
2750 | # endif | |
36d16f8e | 2751 | |
0f113f3e MC |
2752 | # ifdef EAGAIN |
2753 | # if EWOULDBLOCK != EAGAIN | |
2754 | case EAGAIN: | |
2755 | # endif | |
36d16f8e | 2756 | # endif |
36d16f8e | 2757 | |
0f113f3e MC |
2758 | # ifdef EPROTO |
2759 | case EPROTO: | |
2760 | # endif | |
36d16f8e | 2761 | |
0f113f3e MC |
2762 | # ifdef EINPROGRESS |
2763 | case EINPROGRESS: | |
2764 | # endif | |
36d16f8e | 2765 | |
0f113f3e MC |
2766 | # ifdef EALREADY |
2767 | case EALREADY: | |
2768 | # endif | |
36d16f8e | 2769 | |
208fb891 | 2770 | return 1; |
0f113f3e MC |
2771 | default: |
2772 | break; | |
2773 | } | |
26a7d938 | 2774 | return 0; |
0f113f3e | 2775 | } |
5d6a0179 | 2776 | |
74e056ed | 2777 | #endif |