2 * Copyright 2005-2023 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
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
17 #include "internal/time.h"
18 #include "bio_local.h"
19 #ifndef OPENSSL_NO_DGRAM
21 # ifndef OPENSSL_NO_SCTP
22 # include <netinet/sctp.h>
24 # define OPENSSL_SCTP_DATA_CHUNK_TYPE 0x00
25 # define OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE 0xc0
28 # if defined(OPENSSL_SYS_LINUX) && !defined(IP_MTU)
29 # define IP_MTU 14 /* linux is lame */
32 # if OPENSSL_USE_IPV6 && !defined(IPPROTO_IPV6)
33 # define IPPROTO_IPV6 41 /* windows is lame */
36 # if defined(__FreeBSD__) && defined(IN6_IS_ADDR_V4MAPPED)
37 /* Standard definition causes type-punning problems. */
38 # undef IN6_IS_ADDR_V4MAPPED
39 # define s6_addr32 __u6_addr.__u6_addr32
40 # define IN6_IS_ADDR_V4MAPPED(a) \
41 (((a)->s6_addr32[0] == 0) && \
42 ((a)->s6_addr32[1] == 0) && \
43 ((a)->s6_addr32[2] == htonl(0x0000ffff)))
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
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
63 # define M_METHOD M_METHOD_NONE
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
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)
85 # if M_METHOD == M_METHOD_RECVMMSG \
86 || M_METHOD == M_METHOD_RECVMSG \
87 || M_METHOD == M_METHOD_WSARECVMSG
88 # if defined(__APPLE__)
90 * CMSG_SPACE is not a constant expresson on OSX even though POSIX
91 * says it's supposed to be. This should be adequate.
93 # define BIO_CMSG_ALLOC_LEN 64
95 # if defined(IPV6_PKTINFO)
96 # define BIO_CMSG_ALLOC_LEN_1 BIO_CMSG_SPACE(sizeof(struct in6_pktinfo))
98 # define BIO_CMSG_ALLOC_LEN_1 0
100 # if defined(IP_PKTINFO)
101 # define BIO_CMSG_ALLOC_LEN_2 BIO_CMSG_SPACE(sizeof(struct in_pktinfo))
103 # define BIO_CMSG_ALLOC_LEN_2 0
105 # if defined(IP_RECVDSTADDR)
106 # define BIO_CMSG_ALLOC_LEN_3 BIO_CMSG_SPACE(sizeof(struct in_addr))
108 # define BIO_CMSG_ALLOC_LEN_3 0
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))
115 # if (defined(IP_PKTINFO) || defined(IP_RECVDSTADDR)) && defined(IPV6_RECVPKTINFO)
116 # define SUPPORT_LOCAL_ADDR
120 # define BIO_MSG_N(array, stride, n) (*(BIO_MSG *)((char *)(array) + (n)*(stride)))
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);
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);
136 # ifndef OPENSSL_NO_SCTP
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);
143 static int dgram_sctp_wait_for_dry(BIO *b);
144 static int dgram_sctp_msg_waiting(BIO *b);
145 # ifdef SCTP_AUTHENTICATION_EVENT
146 static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification
151 static int BIO_dgram_should_retry(int s);
153 static const BIO_METHOD methods_dgramp = {
161 NULL, /* dgram_gets, */
165 NULL, /* dgram_callback_ctrl */
170 # ifndef OPENSSL_NO_SCTP
171 static const BIO_METHOD methods_dgramp_sctp = {
173 "datagram sctp socket",
179 NULL, /* dgram_gets, */
183 NULL, /* dgram_callback_ctrl */
189 typedef struct bio_dgram_data_st {
192 unsigned int connected;
195 OSSL_TIME next_timeout;
196 OSSL_TIME socket_timeout;
197 unsigned int peekmode;
198 char local_addr_enabled;
201 # ifndef OPENSSL_NO_SCTP
202 typedef struct bio_dgram_sctp_save_message_st {
206 } bio_dgram_sctp_save_message;
208 typedef struct bio_dgram_sctp_data_st {
210 unsigned int connected;
213 struct bio_dgram_sctp_sndinfo sndinfo;
214 struct bio_dgram_sctp_rcvinfo rcvinfo;
215 struct bio_dgram_sctp_prinfo prinfo;
216 BIO_dgram_sctp_notification_handler_fn handle_notifications;
217 void *notification_context;
222 int peer_auth_tested;
223 } bio_dgram_sctp_data;
226 const BIO_METHOD *BIO_s_datagram(void)
228 return &methods_dgramp;
231 BIO *BIO_new_dgram(int fd, int close_flag)
235 ret = BIO_new(BIO_s_datagram());
238 BIO_set_fd(ret, fd, close_flag);
242 static int dgram_new(BIO *bi)
244 bio_dgram_data *data = OPENSSL_zalloc(sizeof(*data));
252 static int dgram_free(BIO *a)
254 bio_dgram_data *data;
261 data = (bio_dgram_data *)a->ptr;
267 static int dgram_clear(BIO *a)
273 BIO_closesocket(a->num);
281 static void dgram_adjust_rcv_timeout(BIO *b)
283 # if defined(SO_RCVTIMEO)
284 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
287 /* Is a timer active? */
288 if (!ossl_time_is_zero(data->next_timeout)) {
289 /* Read current socket timeout */
290 # ifdef OPENSSL_SYS_WINDOWS
292 int sz = sizeof(timeout);
294 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
295 (void *)&timeout, &sz) < 0)
296 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
297 "calling getsockopt()");
299 data->socket_timeout = ossl_ms2time(timeout);
302 socklen_t sz = sizeof(tv);
304 if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &tv, &sz) < 0)
305 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
306 "calling getsockopt()");
308 data->socket_timeout = ossl_time_from_timeval(tv);
311 /* Calculate time left until timer expires */
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);
317 * Adjust socket timeout if next handshake message timer will expire
320 if (ossl_time_is_zero(data->socket_timeout)
321 || ossl_time_compare(data->socket_timeout, timeleft) >= 0) {
322 # ifdef OPENSSL_SYS_WINDOWS
323 timeout = (int)ossl_time2ms(timeleft);
324 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
325 (void *)&timeout, sizeof(timeout)) < 0)
326 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
327 "calling setsockopt()");
329 tv = ossl_time_to_timeval(timeleft);
330 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &tv,
332 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
333 "calling setsockopt()");
340 static void dgram_update_local_addr(BIO *b)
342 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
343 socklen_t addr_len = sizeof(data->local_addr);
345 if (getsockname(b->num, &data->local_addr.sa, &addr_len) < 0)
347 * This should not be possible, but zero-initialize and return
350 BIO_ADDR_clear(&data->local_addr);
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)
356 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
357 return data->local_addr.sa.sa_family;
361 static void dgram_reset_rcv_timeout(BIO *b)
363 # if defined(SO_RCVTIMEO)
364 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
366 /* Is a timer active? */
367 if (!ossl_time_is_zero(data->next_timeout)) {
368 # ifdef OPENSSL_SYS_WINDOWS
369 int timeout = (int)ossl_time2ms(data->socket_timeout);
371 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
372 (void *)&timeout, sizeof(timeout)) < 0)
373 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
374 "calling setsockopt()");
376 struct timeval tv = ossl_time_to_timeval(data->socket_timeout);
378 if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) < 0)
379 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
380 "calling setsockopt()");
386 static int dgram_read(BIO *b, char *out, int outl)
389 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
393 socklen_t len = sizeof(peer);
396 clear_socket_error();
397 BIO_ADDR_clear(&peer);
398 dgram_adjust_rcv_timeout(b);
401 ret = recvfrom(b->num, out, outl, flags,
402 BIO_ADDR_sockaddr_noconst(&peer), &len);
404 if (!data->connected && ret >= 0)
405 BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &peer);
407 BIO_clear_retry_flags(b);
409 if (BIO_dgram_should_retry(ret)) {
410 BIO_set_retry_read(b);
411 data->_errno = get_last_socket_error();
415 dgram_reset_rcv_timeout(b);
420 static int dgram_write(BIO *b, const char *in, int inl)
423 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
424 clear_socket_error();
427 ret = writesocket(b->num, in, inl);
429 int peerlen = BIO_ADDR_sockaddr_size(&data->peer);
431 ret = sendto(b->num, in, inl, 0,
432 BIO_ADDR_sockaddr(&data->peer), peerlen);
435 BIO_clear_retry_flags(b);
437 if (BIO_dgram_should_retry(ret)) {
438 BIO_set_retry_write(b);
439 data->_errno = get_last_socket_error();
445 static long dgram_get_mtu_overhead(bio_dgram_data *data)
449 switch (BIO_ADDR_family(&data->peer)) {
452 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
456 # if OPENSSL_USE_IPV6
459 # ifdef IN6_IS_ADDR_V4MAPPED
460 struct in6_addr tmp_addr;
461 if (BIO_ADDR_rawaddress(&data->peer, &tmp_addr, NULL)
462 && IN6_IS_ADDR_V4MAPPED(&tmp_addr))
464 * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP
470 * Assume this is UDP - 40 bytes for IP, 8 bytes for UDP
477 /* We don't know. Go with the historical default */
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);
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)
498 # elif defined(IP_RECVDSTADDR)
499 /* Fall back to IP_RECVDSTADDR */
501 if (setsockopt(b->num, IPPROTO_IP, IP_RECVDSTADDR,
502 &enable, sizeof(enable)) < 0)
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)
525 static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
529 bio_dgram_data *data = NULL;
531 /* There are currently no cases where this is used on djgpp/watt32. */
535 # if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
536 socklen_t sockopt_len; /* assume that system supporting IP_MTU is
537 * modern enough to define socklen_t */
542 data = (bio_dgram_data *)b->ptr;
554 b->num = *((int *)ptr);
555 b->shutdown = (int)num;
557 dgram_update_local_addr(b);
558 # if defined(SUPPORT_LOCAL_ADDR)
559 if (data->local_addr_enabled) {
560 if (enable_local_addr(b, 1) < 1)
561 data->local_addr_enabled = 0;
574 case BIO_CTRL_GET_CLOSE:
577 case BIO_CTRL_SET_CLOSE:
578 b->shutdown = (int)num;
580 case BIO_CTRL_PENDING:
581 case BIO_CTRL_WPENDING:
588 case BIO_CTRL_DGRAM_CONNECT:
589 BIO_ADDR_make(&data->peer, BIO_ADDR_sockaddr((BIO_ADDR *)ptr));
591 /* (Linux)kernel sets DF bit on outgoing IP packets */
592 case BIO_CTRL_DGRAM_MTU_DISCOVER:
593 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
594 addr_len = (socklen_t) sizeof(addr);
595 BIO_ADDR_clear(&addr);
596 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
600 switch (addr.sa.sa_family) {
602 sockopt_val = IP_PMTUDISC_DO;
603 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
604 &sockopt_val, sizeof(sockopt_val))) < 0)
605 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
606 "calling setsockopt()");
608 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
610 sockopt_val = IPV6_PMTUDISC_DO;
611 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
612 &sockopt_val, sizeof(sockopt_val))) < 0)
613 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
614 "calling setsockopt()");
625 case BIO_CTRL_DGRAM_QUERY_MTU:
626 # if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU)
627 addr_len = (socklen_t) sizeof(addr);
628 BIO_ADDR_clear(&addr);
629 if (getsockname(b->num, &addr.sa, &addr_len) < 0) {
633 sockopt_len = sizeof(sockopt_val);
634 switch (addr.sa.sa_family) {
637 getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val,
638 &sockopt_len)) < 0 || sockopt_val < 0) {
642 * we assume that the transport protocol is UDP and no IP
645 data->mtu = sockopt_val - 8 - 20;
649 # if OPENSSL_USE_IPV6 && defined(IPV6_MTU)
652 getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU,
653 (void *)&sockopt_val, &sockopt_len)) < 0
654 || sockopt_val < 0) {
658 * we assume that the transport protocol is UDP and no IPV6
661 data->mtu = sockopt_val - 8 - 40;
674 case BIO_CTRL_DGRAM_GET_FALLBACK_MTU:
675 ret = -dgram_get_mtu_overhead(data);
676 switch (BIO_ADDR_family(&data->peer)) {
680 # if OPENSSL_USE_IPV6
683 # ifdef IN6_IS_ADDR_V4MAPPED
684 struct in6_addr tmp_addr;
685 if (BIO_ADDR_rawaddress(&data->peer, &tmp_addr, NULL)
686 && IN6_IS_ADDR_V4MAPPED(&tmp_addr))
699 case BIO_CTRL_DGRAM_GET_MTU:
701 case BIO_CTRL_DGRAM_SET_MTU:
705 case BIO_CTRL_DGRAM_SET_CONNECTED:
708 BIO_ADDR_make(&data->peer, BIO_ADDR_sockaddr((BIO_ADDR *)ptr));
711 BIO_ADDR_clear(&data->peer);
714 case BIO_CTRL_DGRAM_GET_PEER:
715 ret = BIO_ADDR_sockaddr_size(&data->peer);
716 /* FIXME: if num < ret, we will only return part of an address.
717 That should bee an error, no? */
718 if (num == 0 || num > ret)
720 memcpy(ptr, &data->peer, (ret = num));
722 case BIO_CTRL_DGRAM_SET_PEER:
723 BIO_ADDR_make(&data->peer, BIO_ADDR_sockaddr((BIO_ADDR *)ptr));
725 case BIO_CTRL_DGRAM_DETECT_PEER_ADDR:
727 BIO_ADDR xaddr, *p = &data->peer;
728 socklen_t xaddr_len = sizeof(xaddr.sa);
730 if (BIO_ADDR_family(p) == AF_UNSPEC) {
731 if (getpeername(b->num, (void *)&xaddr.sa, &xaddr_len) == 0
732 && BIO_ADDR_family(&xaddr) != AF_UNSPEC) {
740 ret = BIO_ADDR_sockaddr_size(p);
741 if (num == 0 || num > ret)
744 memcpy(ptr, p, (ret = num));
748 if (!BIO_socket_nbio(b->num, num != 0))
751 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
752 data->next_timeout = ossl_time_from_timeval(*(struct timeval *)ptr);
754 # if defined(SO_RCVTIMEO)
755 case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT:
756 # ifdef OPENSSL_SYS_WINDOWS
758 struct timeval *tv = (struct timeval *)ptr;
759 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
761 if ((ret = setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
762 (void *)&timeout, sizeof(timeout))) < 0)
763 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
764 "calling setsockopt()");
767 if ((ret = setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr,
768 sizeof(struct timeval))) < 0)
769 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
770 "calling setsockopt()");
773 case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT:
775 # ifdef OPENSSL_SYS_WINDOWS
778 struct timeval *tv = (struct timeval *)ptr;
780 sz = sizeof(timeout);
781 if ((ret = getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
782 (void *)&timeout, &sz)) < 0) {
783 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
784 "calling getsockopt()");
786 tv->tv_sec = timeout / 1000;
787 tv->tv_usec = (timeout % 1000) * 1000;
791 socklen_t sz = sizeof(struct timeval);
792 if ((ret = getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO,
794 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
795 "calling getsockopt()");
797 OPENSSL_assert((size_t)sz <= sizeof(struct timeval));
804 # if defined(SO_SNDTIMEO)
805 case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT:
806 # ifdef OPENSSL_SYS_WINDOWS
808 struct timeval *tv = (struct timeval *)ptr;
809 int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000;
811 if ((ret = setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
812 (void *)&timeout, sizeof(timeout))) < 0)
813 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
814 "calling setsockopt()");
817 if ((ret = setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr,
818 sizeof(struct timeval))) < 0)
819 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
820 "calling setsockopt()");
823 case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT:
825 # ifdef OPENSSL_SYS_WINDOWS
828 struct timeval *tv = (struct timeval *)ptr;
830 sz = sizeof(timeout);
831 if ((ret = getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
832 (void *)&timeout, &sz)) < 0) {
833 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
834 "calling getsockopt()");
836 tv->tv_sec = timeout / 1000;
837 tv->tv_usec = (timeout % 1000) * 1000;
841 socklen_t sz = sizeof(struct timeval);
843 if ((ret = getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO,
845 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
846 "calling getsockopt()");
848 OPENSSL_assert((size_t)sz <= sizeof(struct timeval));
855 case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP:
857 case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP:
858 # ifdef OPENSSL_SYS_WINDOWS
859 d_errno = (data->_errno == WSAETIMEDOUT);
861 d_errno = (data->_errno == EAGAIN);
870 case BIO_CTRL_DGRAM_MTU_EXCEEDED:
871 if (data->_errno == EMSGSIZE) {
878 case BIO_CTRL_DGRAM_SET_DONT_FRAG:
879 switch (data->peer.sa.sa_family) {
881 # if defined(IP_DONTFRAG)
882 sockopt_val = num ? 1 : 0;
883 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAG,
884 &sockopt_val, sizeof(sockopt_val))) < 0)
885 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
886 "calling setsockopt()");
887 # elif defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined (IP_PMTUDISC_PROBE)
888 sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT;
889 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER,
890 &sockopt_val, sizeof(sockopt_val))) < 0)
891 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
892 "calling setsockopt()");
893 # elif defined(OPENSSL_SYS_WINDOWS) && defined(IP_DONTFRAGMENT)
894 sockopt_val = num ? 1 : 0;
895 if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAGMENT,
896 (const char *)&sockopt_val,
897 sizeof(sockopt_val))) < 0)
898 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
899 "calling setsockopt()");
904 # if OPENSSL_USE_IPV6
906 # if defined(IPV6_DONTFRAG)
907 sockopt_val = num ? 1 : 0;
908 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_DONTFRAG,
909 (const void *)&sockopt_val,
910 sizeof(sockopt_val))) < 0)
911 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
912 "calling setsockopt()");
914 # elif defined(OPENSSL_SYS_LINUX) && defined(IPV6_MTUDISCOVER)
915 sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT;
916 if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
917 &sockopt_val, sizeof(sockopt_val))) < 0)
918 ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
919 "calling setsockopt()");
930 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
931 ret = dgram_get_mtu_overhead(data);
935 * BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE is used here for compatibility
936 * reasons. When BIO_CTRL_DGRAM_SET_PEEK_MODE was first defined its value
937 * was incorrectly clashing with BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE. The
938 * value has been updated to a non-clashing value. However to preserve
939 * binary compatibility we now respond to both the old value and the new one
941 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
942 case BIO_CTRL_DGRAM_SET_PEEK_MODE:
943 data->peekmode = (unsigned int)num;
946 case BIO_CTRL_DGRAM_GET_LOCAL_ADDR_CAP:
947 # if defined(SUPPORT_LOCAL_ADDR)
954 case BIO_CTRL_DGRAM_SET_LOCAL_ADDR_ENABLE:
955 # if defined(SUPPORT_LOCAL_ADDR)
957 if (num != data->local_addr_enabled) {
958 if (enable_local_addr(b, num) < 1) {
963 data->local_addr_enabled = (char)num;
970 case BIO_CTRL_DGRAM_GET_LOCAL_ADDR_ENABLE:
971 *(int *)ptr = data->local_addr_enabled;
974 case BIO_CTRL_DGRAM_GET_EFFECTIVE_CAPS:
975 ret = (long)(BIO_DGRAM_CAP_HANDLES_DST_ADDR
976 | BIO_DGRAM_CAP_HANDLES_SRC_ADDR
977 | BIO_DGRAM_CAP_PROVIDES_DST_ADDR
978 | BIO_DGRAM_CAP_PROVIDES_SRC_ADDR);
981 case BIO_CTRL_GET_RPOLL_DESCRIPTOR:
982 case BIO_CTRL_GET_WPOLL_DESCRIPTOR:
984 BIO_POLL_DESCRIPTOR *pd = ptr;
986 pd->type = BIO_POLL_DESCRIPTOR_TYPE_SOCK_FD;
987 pd->value.fd = b->num;
995 /* Normalize if error */
1001 static int dgram_puts(BIO *bp, const char *str)
1006 ret = dgram_write(bp, str, n);
1010 # if M_METHOD == M_METHOD_WSARECVMSG
1011 static void translate_msg_win(BIO *b, WSAMSG *mh, WSABUF *iov,
1012 unsigned char *control, BIO_MSG *msg)
1014 iov->len = msg->data_len;
1015 iov->buf = msg->data;
1017 /* Windows requires namelen to be set exactly */
1018 mh->name = msg->peer != NULL ? &msg->peer->sa : NULL;
1019 if (msg->peer != NULL && dgram_get_sock_family(b) == AF_INET)
1020 mh->namelen = sizeof(struct sockaddr_in);
1021 # if OPENSSL_USE_IPV6
1022 else if (msg->peer != NULL && dgram_get_sock_family(b) == AF_INET6)
1023 mh->namelen = sizeof(struct sockaddr_in6);
1029 * When local address reception (IP_PKTINFO, etc.) is enabled, on Windows
1030 * this causes WSARecvMsg to fail if the control buffer is too small to hold
1031 * the structure, or if no control buffer is passed. So we need to give it
1032 * the control buffer even if we aren't actually going to examine the
1035 mh->lpBuffers = iov;
1036 mh->dwBufferCount = 1;
1037 mh->Control.len = BIO_CMSG_ALLOC_LEN;
1038 mh->Control.buf = control;
1043 # if M_METHOD == M_METHOD_RECVMMSG || M_METHOD == M_METHOD_RECVMSG
1044 /* Translates a BIO_MSG to a msghdr and iovec. */
1045 static void translate_msg(BIO *b, struct msghdr *mh, struct iovec *iov,
1046 unsigned char *control, BIO_MSG *msg)
1048 iov->iov_base = msg->data;
1049 iov->iov_len = msg->data_len;
1051 /* macOS requires msg_namelen be 0 if msg_name is NULL */
1052 mh->msg_name = msg->peer != NULL ? &msg->peer->sa : NULL;
1053 if (msg->peer != NULL && dgram_get_sock_family(b) == AF_INET)
1054 mh->msg_namelen = sizeof(struct sockaddr_in);
1055 # if OPENSSL_USE_IPV6
1056 else if (msg->peer != NULL && dgram_get_sock_family(b) == AF_INET6)
1057 mh->msg_namelen = sizeof(struct sockaddr_in6);
1060 mh->msg_namelen = 0;
1064 mh->msg_control = msg->local != NULL ? control : NULL;
1065 mh->msg_controllen = msg->local != NULL ? BIO_CMSG_ALLOC_LEN : 0;
1070 # if M_METHOD == M_METHOD_RECVMMSG || M_METHOD == M_METHOD_RECVMSG || M_METHOD == M_METHOD_WSARECVMSG
1071 /* Extracts destination address from the control buffer. */
1072 static int extract_local(BIO *b, MSGHDR_TYPE *mh, BIO_ADDR *local) {
1073 # if defined(IP_PKTINFO) || defined(IP_RECVDSTADDR) || defined(IPV6_PKTINFO)
1075 int af = dgram_get_sock_family(b);
1077 for (cmsg = BIO_CMSG_FIRSTHDR(mh); cmsg != NULL;
1078 cmsg = BIO_CMSG_NXTHDR(mh, cmsg)) {
1079 if (af == AF_INET) {
1080 if (cmsg->cmsg_level != IPPROTO_IP)
1083 # if defined(IP_PKTINFO)
1084 if (cmsg->cmsg_type != IP_PKTINFO)
1087 local->s_in.sin_addr =
1088 ((struct in_pktinfo *)BIO_CMSG_DATA(cmsg))->ipi_addr;
1090 # elif defined(IP_RECVDSTADDR)
1091 if (cmsg->cmsg_type != IP_RECVDSTADDR)
1094 local->s_in.sin_addr = *(struct in_addr *)BIO_CMSG_DATA(cmsg);
1097 # if defined(IP_PKTINFO) || defined(IP_RECVDSTADDR)
1099 bio_dgram_data *data = b->ptr;
1101 local->s_in.sin_family = AF_INET;
1102 local->s_in.sin_port = data->local_addr.s_in.sin_port;
1107 # if OPENSSL_USE_IPV6
1108 else if (af == AF_INET6) {
1109 if (cmsg->cmsg_level != IPPROTO_IPV6)
1112 # if defined(IPV6_RECVPKTINFO)
1113 if (cmsg->cmsg_type != IPV6_PKTINFO)
1117 bio_dgram_data *data = b->ptr;
1119 local->s_in6.sin6_addr =
1120 ((struct in6_pktinfo *)BIO_CMSG_DATA(cmsg))->ipi6_addr;
1121 local->s_in6.sin6_family = AF_INET6;
1122 local->s_in6.sin6_port = data->local_addr.s_in6.sin6_port;
1123 local->s_in6.sin6_scope_id =
1124 data->local_addr.s_in6.sin6_scope_id;
1125 local->s_in6.sin6_flowinfo = 0;
1137 static int pack_local(BIO *b, MSGHDR_TYPE *mh, const BIO_ADDR *local) {
1138 int af = dgram_get_sock_family(b);
1139 # if defined(IP_PKTINFO) || defined(IP_RECVDSTADDR) || defined(IPV6_PKTINFO)
1141 bio_dgram_data *data = b->ptr;
1144 if (af == AF_INET) {
1145 # if defined(IP_PKTINFO)
1146 struct in_pktinfo *info;
1148 # if defined(OPENSSL_SYS_WINDOWS)
1149 cmsg = (CMSGHDR_TYPE *)mh->Control.buf;
1151 cmsg = (CMSGHDR_TYPE *)mh->msg_control;
1154 cmsg->cmsg_len = BIO_CMSG_LEN(sizeof(struct in_pktinfo));
1155 cmsg->cmsg_level = IPPROTO_IP;
1156 cmsg->cmsg_type = IP_PKTINFO;
1158 info = (struct in_pktinfo *)BIO_CMSG_DATA(cmsg);
1159 # if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_CYGWIN)
1160 info->ipi_spec_dst = local->s_in.sin_addr;
1162 info->ipi_addr.s_addr = 0;
1163 info->ipi_ifindex = 0;
1166 * We cannot override source port using this API, therefore
1167 * ensure the application specified a source port of 0
1168 * or the one we are bound to. (Better to error than silently
1171 if (local->s_in.sin_port != 0
1172 && data->local_addr.s_in.sin_port != local->s_in.sin_port) {
1173 ERR_raise(ERR_LIB_BIO, BIO_R_PORT_MISMATCH);
1177 # if defined(OPENSSL_SYS_WINDOWS)
1178 mh->Control.len = BIO_CMSG_SPACE(sizeof(struct in_pktinfo));
1180 mh->msg_controllen = BIO_CMSG_SPACE(sizeof(struct in_pktinfo));
1184 # elif defined(IP_SENDSRCADDR)
1185 struct in_addr *info;
1188 * At least FreeBSD is very pedantic about using IP_SENDSRCADDR when we
1189 * are not bound to 0.0.0.0 or ::, even if the address matches what we
1190 * bound to. Support this by not packing the structure if the address
1191 * matches our understanding of our local address. IP_SENDSRCADDR is a
1192 * BSD thing, so we don't need an explicit test for BSD here.
1194 if (local->s_in.sin_addr.s_addr == data->local_addr.s_in.sin_addr.s_addr) {
1195 mh->msg_control = NULL;
1196 mh->msg_controllen = 0;
1200 cmsg = (struct cmsghdr *)mh->msg_control;
1201 cmsg->cmsg_len = BIO_CMSG_LEN(sizeof(struct in_addr));
1202 cmsg->cmsg_level = IPPROTO_IP;
1203 cmsg->cmsg_type = IP_SENDSRCADDR;
1205 info = (struct in_addr *)BIO_CMSG_DATA(cmsg);
1206 *info = local->s_in.sin_addr;
1208 /* See comment above. */
1209 if (local->s_in.sin_port != 0
1210 && data->local_addr.s_in.sin_port != local->s_in.sin_port) {
1211 ERR_raise(ERR_LIB_BIO, BIO_R_PORT_MISMATCH);
1215 mh->msg_controllen = BIO_CMSG_SPACE(sizeof(struct in_addr));
1219 # if OPENSSL_USE_IPV6
1220 else if (af == AF_INET6) {
1221 # if defined(IPV6_PKTINFO)
1222 struct in6_pktinfo *info;
1224 # if defined(OPENSSL_SYS_WINDOWS)
1225 cmsg = (CMSGHDR_TYPE *)mh->Control.buf;
1227 cmsg = (CMSGHDR_TYPE *)mh->msg_control;
1229 cmsg->cmsg_len = BIO_CMSG_LEN(sizeof(struct in6_pktinfo));
1230 cmsg->cmsg_level = IPPROTO_IPV6;
1231 cmsg->cmsg_type = IPV6_PKTINFO;
1233 info = (struct in6_pktinfo *)BIO_CMSG_DATA(cmsg);
1234 info->ipi6_addr = local->s_in6.sin6_addr;
1235 info->ipi6_ifindex = 0;
1238 * See comment above, but also applies to the other fields
1241 if (local->s_in6.sin6_port != 0
1242 && data->local_addr.s_in6.sin6_port != local->s_in6.sin6_port) {
1243 ERR_raise(ERR_LIB_BIO, BIO_R_PORT_MISMATCH);
1247 if (local->s_in6.sin6_scope_id != 0
1248 && data->local_addr.s_in6.sin6_scope_id != local->s_in6.sin6_scope_id) {
1249 ERR_raise(ERR_LIB_BIO, BIO_R_PORT_MISMATCH);
1253 # if defined(OPENSSL_SYS_WINDOWS)
1254 mh->Control.len = BIO_CMSG_SPACE(sizeof(struct in6_pktinfo));
1256 mh->msg_controllen = BIO_CMSG_SPACE(sizeof(struct in6_pktinfo));
1268 * Converts flags passed to BIO_sendmmsg or BIO_recvmmsg to syscall flags. You
1269 * should mask out any system flags returned by this function you cannot support
1270 * in a particular circumstance. Currently no flags are defined.
1272 # if M_METHOD != M_METHOD_NONE
1273 static int translate_flags(uint64_t flags) {
1278 static int dgram_sendmmsg(BIO *b, BIO_MSG *msg, size_t stride,
1279 size_t num_msg, uint64_t flags, size_t *num_processed)
1281 # if M_METHOD != M_METHOD_NONE && M_METHOD != M_METHOD_RECVMSG
1284 # if M_METHOD == M_METHOD_RECVMMSG
1285 # define BIO_MAX_MSGS_PER_CALL 64
1287 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
1289 struct mmsghdr mh[BIO_MAX_MSGS_PER_CALL];
1290 struct iovec iov[BIO_MAX_MSGS_PER_CALL];
1291 unsigned char control[BIO_MAX_MSGS_PER_CALL][BIO_CMSG_ALLOC_LEN];
1292 int have_local_enabled = data->local_addr_enabled;
1293 # elif M_METHOD == M_METHOD_RECVMSG
1295 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
1299 unsigned char control[BIO_CMSG_ALLOC_LEN];
1300 int have_local_enabled = data->local_addr_enabled;
1301 # elif M_METHOD == M_METHOD_WSARECVMSG
1302 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
1303 int have_local_enabled = data->local_addr_enabled;
1306 DWORD num_bytes_sent = 0;
1307 unsigned char control[BIO_CMSG_ALLOC_LEN];
1309 # if M_METHOD == M_METHOD_RECVFROM || M_METHOD == M_METHOD_WSARECVMSG
1318 if (num_msg > OSSL_SSIZE_MAX)
1319 num_msg = OSSL_SSIZE_MAX;
1321 # if M_METHOD != M_METHOD_NONE
1322 sysflags = translate_flags(flags);
1325 # if M_METHOD == M_METHOD_RECVMMSG
1327 * In the sendmmsg/recvmmsg case, we need to allocate our translated struct
1328 * msghdr and struct iovec on the stack to support multithreaded use. Thus
1329 * we place a fixed limit on the number of messages per call, in the
1330 * expectation that we will be called again if there were more messages to
1333 if (num_msg > BIO_MAX_MSGS_PER_CALL)
1334 num_msg = BIO_MAX_MSGS_PER_CALL;
1336 for (i = 0; i < num_msg; ++i) {
1337 translate_msg(b, &mh[i].msg_hdr, &iov[i],
1338 control[i], &BIO_MSG_N(msg, stride, i));
1340 /* If local address was requested, it must have been enabled */
1341 if (BIO_MSG_N(msg, stride, i).local != NULL) {
1342 if (!have_local_enabled) {
1343 ERR_raise(ERR_LIB_BIO, BIO_R_LOCAL_ADDR_NOT_AVAILABLE);
1348 if (pack_local(b, &mh[i].msg_hdr,
1349 BIO_MSG_N(msg, stride, i).local) < 1) {
1350 ERR_raise(ERR_LIB_BIO, BIO_R_LOCAL_ADDR_NOT_AVAILABLE);
1358 ret = sendmmsg(b->num, mh, num_msg, sysflags);
1360 ERR_raise(ERR_LIB_SYS, get_last_socket_error());
1365 for (i = 0; i < (size_t)ret; ++i) {
1366 BIO_MSG_N(msg, stride, i).data_len = mh[i].msg_len;
1367 BIO_MSG_N(msg, stride, i).flags = 0;
1370 *num_processed = (size_t)ret;
1373 # elif M_METHOD == M_METHOD_RECVMSG
1375 * If sendmsg is available, use it.
1377 translate_msg(b, &mh, &iov, control, msg);
1379 if (msg->local != NULL) {
1380 if (!have_local_enabled) {
1381 ERR_raise(ERR_LIB_BIO, BIO_R_LOCAL_ADDR_NOT_AVAILABLE);
1386 if (pack_local(b, &mh, msg->local) < 1) {
1387 ERR_raise(ERR_LIB_BIO, BIO_R_LOCAL_ADDR_NOT_AVAILABLE);
1393 l = sendmsg(b->num, &mh, sysflags);
1395 ERR_raise(ERR_LIB_SYS, get_last_socket_error());
1400 msg->data_len = (size_t)l;
1405 # elif M_METHOD == M_METHOD_WSARECVMSG || M_METHOD == M_METHOD_RECVFROM
1406 # if M_METHOD == M_METHOD_WSARECVMSG
1407 if (bio_WSASendMsg != NULL) {
1408 /* WSASendMsg-based implementation for Windows. */
1409 translate_msg_win(b, &wmsg, &wbuf, control, msg);
1411 if (msg[0].local != NULL) {
1412 if (!have_local_enabled) {
1413 ERR_raise(ERR_LIB_BIO, BIO_R_LOCAL_ADDR_NOT_AVAILABLE);
1418 if (pack_local(b, &wmsg, msg[0].local) < 1) {
1419 ERR_raise(ERR_LIB_BIO, BIO_R_LOCAL_ADDR_NOT_AVAILABLE);
1425 ret = WSASendMsg((SOCKET)b->num, &wmsg, 0, &num_bytes_sent, NULL, NULL);
1427 ERR_raise(ERR_LIB_SYS, get_last_socket_error());
1432 msg[0].data_len = num_bytes_sent;
1440 * Fallback to sendto and send a single message.
1442 if (msg[0].local != NULL) {
1444 * We cannot set the local address if using sendto
1445 * so fail in this case
1447 ERR_raise(ERR_LIB_BIO, BIO_R_LOCAL_ADDR_NOT_AVAILABLE);
1452 ret = sendto(b->num, msg[0].data,
1453 # if defined(OPENSSL_SYS_WINDOWS)
1454 (int)msg[0].data_len,
1459 msg[0].peer != NULL ? BIO_ADDR_sockaddr(msg[0].peer) : NULL,
1460 msg[0].peer != NULL ? BIO_ADDR_sockaddr_size(msg[0].peer) : 0);
1462 ERR_raise(ERR_LIB_SYS, get_last_socket_error());
1467 msg[0].data_len = ret;
1473 ERR_raise(ERR_LIB_BIO, BIO_R_UNSUPPORTED_METHOD);
1479 static int dgram_recvmmsg(BIO *b, BIO_MSG *msg,
1480 size_t stride, size_t num_msg,
1481 uint64_t flags, size_t *num_processed)
1483 # if M_METHOD != M_METHOD_NONE && M_METHOD != M_METHOD_RECVMSG
1486 # if M_METHOD == M_METHOD_RECVMMSG
1488 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
1490 struct mmsghdr mh[BIO_MAX_MSGS_PER_CALL];
1491 struct iovec iov[BIO_MAX_MSGS_PER_CALL];
1492 unsigned char control[BIO_MAX_MSGS_PER_CALL][BIO_CMSG_ALLOC_LEN];
1493 int have_local_enabled = data->local_addr_enabled;
1494 # elif M_METHOD == M_METHOD_RECVMSG
1496 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
1500 unsigned char control[BIO_CMSG_ALLOC_LEN];
1501 int have_local_enabled = data->local_addr_enabled;
1502 # elif M_METHOD == M_METHOD_WSARECVMSG
1503 bio_dgram_data *data = (bio_dgram_data *)b->ptr;
1504 int have_local_enabled = data->local_addr_enabled;
1507 DWORD num_bytes_received = 0;
1508 unsigned char control[BIO_CMSG_ALLOC_LEN];
1510 # if M_METHOD == M_METHOD_RECVFROM || M_METHOD == M_METHOD_WSARECVMSG
1520 if (num_msg > OSSL_SSIZE_MAX)
1521 num_msg = OSSL_SSIZE_MAX;
1523 # if M_METHOD != M_METHOD_NONE
1524 sysflags = translate_flags(flags);
1527 # if M_METHOD == M_METHOD_RECVMMSG
1529 * In the sendmmsg/recvmmsg case, we need to allocate our translated struct
1530 * msghdr and struct iovec on the stack to support multithreaded use. Thus
1531 * we place a fixed limit on the number of messages per call, in the
1532 * expectation that we will be called again if there were more messages to
1535 if (num_msg > BIO_MAX_MSGS_PER_CALL)
1536 num_msg = BIO_MAX_MSGS_PER_CALL;
1538 for (i = 0; i < num_msg; ++i) {
1539 translate_msg(b, &mh[i].msg_hdr, &iov[i],
1540 control[i], &BIO_MSG_N(msg, stride, i));
1542 /* If local address was requested, it must have been enabled */
1543 if (BIO_MSG_N(msg, stride, i).local != NULL && !have_local_enabled) {
1544 ERR_raise(ERR_LIB_BIO, BIO_R_LOCAL_ADDR_NOT_AVAILABLE);
1551 ret = recvmmsg(b->num, mh, num_msg, sysflags, NULL);
1553 ERR_raise(ERR_LIB_SYS, get_last_socket_error());
1558 for (i = 0; i < (size_t)ret; ++i) {
1559 BIO_MSG_N(msg, stride, i).data_len = mh[i].msg_len;
1560 BIO_MSG_N(msg, stride, i).flags = 0;
1562 * *(msg->peer) will have been filled in by recvmmsg;
1563 * for msg->local we parse the control data returned
1565 if (BIO_MSG_N(msg, stride, i).local != NULL)
1566 if (extract_local(b, &mh[i].msg_hdr,
1567 BIO_MSG_N(msg, stride, i).local) < 1)
1569 * It appears BSDs do not support local addresses for
1570 * loopback sockets. In this case, just clear the local
1571 * address, as for OS X and Windows in some circumstances
1574 BIO_ADDR_clear(msg->local);
1577 *num_processed = (size_t)ret;
1580 # elif M_METHOD == M_METHOD_RECVMSG
1582 * If recvmsg is available, use it.
1584 translate_msg(b, &mh, &iov, control, msg);
1586 /* If local address was requested, it must have been enabled */
1587 if (msg->local != NULL && !have_local_enabled) {
1589 * If we have done at least one message, we must return the
1590 * count; if we haven't done any, we can give an error code
1592 ERR_raise(ERR_LIB_BIO, BIO_R_LOCAL_ADDR_NOT_AVAILABLE);
1597 l = recvmsg(b->num, &mh, sysflags);
1599 ERR_raise(ERR_LIB_SYS, get_last_socket_error());
1604 msg->data_len = (size_t)l;
1607 if (msg->local != NULL)
1608 if (extract_local(b, &mh, msg->local) < 1)
1610 * OS X exhibits odd behaviour where it appears that if a packet is
1611 * sent before the receiving interface enables IP_PKTINFO, it will
1612 * sometimes not have any control data returned even if the
1613 * receiving interface enables IP_PKTINFO before calling recvmsg().
1614 * This appears to occur non-deterministically. Presumably, OS X
1615 * handles IP_PKTINFO at the time the packet is enqueued into a
1616 * socket's receive queue, rather than at the time recvmsg() is
1617 * called, unlike most other operating systems. Thus (if this
1618 * hypothesis is correct) there is a race between where IP_PKTINFO
1619 * is enabled by the process and when the kernel's network stack
1620 * queues the incoming message.
1622 * We cannot return the local address if we do not have it, but this
1623 * is not a caller error either, so just return a zero address
1624 * structure. This is similar to how we handle Windows loopback
1625 * interfaces (see below). We enable this workaround for all
1626 * platforms, not just Apple, as this kind of quirk in OS networking
1627 * stacks seems to be common enough that failing hard if a local
1628 * address is not provided appears to be too brittle.
1630 BIO_ADDR_clear(msg->local);
1635 # elif M_METHOD == M_METHOD_RECVFROM || M_METHOD == M_METHOD_WSARECVMSG
1636 # if M_METHOD == M_METHOD_WSARECVMSG
1637 if (bio_WSARecvMsg != NULL) {
1638 /* WSARecvMsg-based implementation for Windows. */
1639 translate_msg_win(b, &wmsg, &wbuf, control, msg);
1641 /* If local address was requested, it must have been enabled */
1642 if (msg[0].local != NULL && !have_local_enabled) {
1643 ERR_raise(ERR_LIB_BIO, BIO_R_LOCAL_ADDR_NOT_AVAILABLE);
1648 ret = WSARecvMsg((SOCKET)b->num, &wmsg, &num_bytes_received, NULL, NULL);
1650 ERR_raise(ERR_LIB_SYS, get_last_socket_error());
1655 msg[0].data_len = num_bytes_received;
1657 if (msg[0].local != NULL)
1658 if (extract_local(b, &wmsg, msg[0].local) < 1)
1660 * On Windows, loopback is not a "proper" interface and it works
1661 * differently; packets are essentially short-circuited and
1662 * don't go through all of the normal processing. A consequence
1663 * of this is that packets sent from the local machine to the
1664 * local machine _will not have IP_PKTINFO_ even if the
1665 * IP_PKTINFO socket option is enabled. WSARecvMsg just sets
1666 * Control.len to 0 on returning.
1668 * This applies regardless of whether the loopback address,
1669 * 127.0.0.1 is used, or a local interface address (e.g.
1670 * 192.168.1.1); in both cases IP_PKTINFO will not be present.
1672 * We report this condition by setting the local BIO_ADDR's
1675 BIO_ADDR_clear(msg[0].local);
1683 * Fallback to recvfrom and receive a single message.
1685 if (msg[0].local != NULL) {
1687 * We cannot determine the local address if using recvfrom
1688 * so fail in this case
1690 ERR_raise(ERR_LIB_BIO, BIO_R_LOCAL_ADDR_NOT_AVAILABLE);
1695 slen = sizeof(*msg[0].peer);
1696 ret = recvfrom(b->num, msg[0].data,
1697 # if defined(OPENSSL_SYS_WINDOWS)
1698 (int)msg[0].data_len,
1703 msg[0].peer != NULL ? &msg[0].peer->sa : NULL,
1704 msg[0].peer != NULL ? &slen : NULL);
1706 ERR_raise(ERR_LIB_SYS, get_last_socket_error());
1710 msg[0].data_len = ret;
1716 ERR_raise(ERR_LIB_BIO, BIO_R_UNSUPPORTED_METHOD);
1722 # ifndef OPENSSL_NO_SCTP
1723 const BIO_METHOD *BIO_s_datagram_sctp(void)
1725 return &methods_dgramp_sctp;
1728 BIO *BIO_new_dgram_sctp(int fd, int close_flag)
1731 int ret, optval = 20000;
1732 int auth_data = 0, auth_forward = 0;
1734 struct sctp_authchunk auth;
1735 struct sctp_authchunks *authchunks;
1736 socklen_t sockopt_len;
1737 # ifdef SCTP_AUTHENTICATION_EVENT
1739 struct sctp_event event;
1741 struct sctp_event_subscribe event;
1745 bio = BIO_new(BIO_s_datagram_sctp());
1748 BIO_set_fd(bio, fd, close_flag);
1750 /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */
1751 auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE;
1753 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
1754 sizeof(struct sctp_authchunk));
1757 ERR_raise_data(ERR_LIB_BIO, ERR_R_SYS_LIB,
1758 "Ensure SCTP AUTH chunks are enabled in kernel");
1761 auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE;
1763 setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth,
1764 sizeof(struct sctp_authchunk));
1767 ERR_raise_data(ERR_LIB_BIO, ERR_R_SYS_LIB,
1768 "Ensure SCTP AUTH chunks are enabled in kernel");
1773 * Test if activation was successful. When using accept(), SCTP-AUTH has
1774 * to be activated for the listening socket already, otherwise the
1775 * connected socket won't use it. Similarly with connect(): the socket
1776 * prior to connection must be activated for SCTP-AUTH
1778 sockopt_len = (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
1779 authchunks = OPENSSL_zalloc(sockopt_len);
1780 if (authchunks == NULL) {
1784 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks,
1787 OPENSSL_free(authchunks);
1792 for (p = (unsigned char *)authchunks->gauth_chunks;
1793 p < (unsigned char *)authchunks + sockopt_len;
1794 p += sizeof(uint8_t)) {
1795 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
1797 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
1801 OPENSSL_free(authchunks);
1803 if (!auth_data || !auth_forward) {
1805 ERR_raise_data(ERR_LIB_BIO, ERR_R_SYS_LIB,
1806 "Ensure SCTP AUTH chunks are enabled on the "
1807 "underlying socket");
1811 # ifdef SCTP_AUTHENTICATION_EVENT
1813 memset(&event, 0, sizeof(event));
1814 event.se_assoc_id = 0;
1815 event.se_type = SCTP_AUTHENTICATION_EVENT;
1818 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event,
1819 sizeof(struct sctp_event));
1825 sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe);
1826 ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len);
1832 event.sctp_authentication_event = 1;
1835 setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event,
1836 sizeof(struct sctp_event_subscribe));
1845 * Disable partial delivery by setting the min size larger than the max
1846 * record size of 2^14 + 2048 + 13
1849 setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval,
1859 int BIO_dgram_is_sctp(BIO *bio)
1861 return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP);
1864 static int dgram_sctp_new(BIO *bi)
1866 bio_dgram_sctp_data *data = NULL;
1870 if ((data = OPENSSL_zalloc(sizeof(*data))) == NULL)
1872 # ifdef SCTP_PR_SCTP_NONE
1873 data->prinfo.pr_policy = SCTP_PR_SCTP_NONE;
1881 static int dgram_sctp_free(BIO *a)
1883 bio_dgram_sctp_data *data;
1887 if (!dgram_clear(a))
1890 data = (bio_dgram_sctp_data *) a->ptr;
1897 # ifdef SCTP_AUTHENTICATION_EVENT
1898 void dgram_sctp_handle_auth_free_key_event(BIO *b,
1899 union sctp_notification *snp)
1902 struct sctp_authkey_event *authkeyevent = &snp->sn_auth_event;
1904 if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY) {
1905 struct sctp_authkeyid authkeyid;
1908 authkeyid.scact_keynumber = authkeyevent->auth_keynumber;
1909 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
1910 &authkeyid, sizeof(struct sctp_authkeyid));
1915 static int dgram_sctp_read(BIO *b, char *out, int outl)
1917 int ret = 0, n = 0, i, optval;
1919 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
1922 struct cmsghdr *cmsg;
1926 clear_socket_error();
1929 memset(&data->rcvinfo, 0, sizeof(data->rcvinfo));
1932 msg.msg_name = NULL;
1933 msg.msg_namelen = 0;
1936 msg.msg_control = cmsgbuf;
1937 msg.msg_controllen = 512;
1939 n = recvmsg(b->num, &msg, 0);
1947 if (msg.msg_controllen > 0) {
1948 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg;
1949 cmsg = CMSG_NXTHDR(&msg, cmsg)) {
1950 if (cmsg->cmsg_level != IPPROTO_SCTP)
1952 # ifdef SCTP_RCVINFO
1953 if (cmsg->cmsg_type == SCTP_RCVINFO) {
1954 struct sctp_rcvinfo *rcvinfo;
1956 rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg);
1957 data->rcvinfo.rcv_sid = rcvinfo->rcv_sid;
1958 data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn;
1959 data->rcvinfo.rcv_flags = rcvinfo->rcv_flags;
1960 data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid;
1961 data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn;
1962 data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn;
1963 data->rcvinfo.rcv_context = rcvinfo->rcv_context;
1967 if (cmsg->cmsg_type == SCTP_SNDRCV) {
1968 struct sctp_sndrcvinfo *sndrcvinfo;
1971 (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
1972 data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream;
1973 data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn;
1974 data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags;
1975 data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid;
1976 data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn;
1977 data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn;
1978 data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context;
1984 if (msg.msg_flags & MSG_NOTIFICATION) {
1985 union sctp_notification snp;
1987 memcpy(&snp, out, sizeof(snp));
1988 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
1990 struct sctp_event event;
1992 struct sctp_event_subscribe event;
1993 socklen_t eventsize;
1996 /* disable sender dry event */
1998 memset(&event, 0, sizeof(event));
1999 event.se_assoc_id = 0;
2000 event.se_type = SCTP_SENDER_DRY_EVENT;
2002 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
2003 sizeof(struct sctp_event));
2009 eventsize = sizeof(struct sctp_event_subscribe);
2010 i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
2017 event.sctp_sender_dry_event = 0;
2019 i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
2020 sizeof(struct sctp_event_subscribe));
2027 # ifdef SCTP_AUTHENTICATION_EVENT
2028 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
2029 dgram_sctp_handle_auth_free_key_event(b, &snp);
2032 if (data->handle_notifications != NULL)
2033 data->handle_notifications(b, data->notification_context,
2036 memset(&snp, 0, sizeof(snp));
2037 memset(out, 0, outl);
2042 while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR)
2045 if (ret > 0 && !(msg.msg_flags & MSG_EOR)) {
2046 /* Partial message read, this should never happen! */
2049 * The buffer was too small, this means the peer sent a message
2050 * that was larger than allowed.
2056 * Test if socket buffer can handle max record size (2^14 + 2048
2059 optlen = (socklen_t) sizeof(int);
2060 ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
2062 OPENSSL_assert(optval >= 18445);
2065 * Test if SCTP doesn't partially deliver below max record size
2066 * (2^14 + 2048 + 13)
2068 optlen = (socklen_t) sizeof(int);
2070 getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT,
2073 OPENSSL_assert(optval >= 18445);
2076 * Partially delivered notification??? Probably a bug....
2078 OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION));
2081 * Everything seems ok till now, so it's most likely a message
2082 * dropped by PR-SCTP.
2084 memset(out, 0, outl);
2085 BIO_set_retry_read(b);
2089 BIO_clear_retry_flags(b);
2091 if (BIO_dgram_should_retry(ret)) {
2092 BIO_set_retry_read(b);
2093 data->_errno = get_last_socket_error();
2097 /* Test if peer uses SCTP-AUTH before continuing */
2098 if (!data->peer_auth_tested) {
2099 int ii, auth_data = 0, auth_forward = 0;
2101 struct sctp_authchunks *authchunks;
2104 (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t));
2105 authchunks = OPENSSL_malloc(optlen);
2106 if (authchunks == NULL)
2108 memset(authchunks, 0, optlen);
2109 ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS,
2110 authchunks, &optlen);
2113 for (p = (unsigned char *)authchunks->gauth_chunks;
2114 p < (unsigned char *)authchunks + optlen;
2115 p += sizeof(uint8_t)) {
2116 if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE)
2118 if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE)
2122 OPENSSL_free(authchunks);
2124 if (!auth_data || !auth_forward) {
2125 ERR_raise(ERR_LIB_BIO, BIO_R_CONNECT_ERROR);
2129 data->peer_auth_tested = 1;
2136 * dgram_sctp_write - send message on SCTP socket
2137 * @b: BIO to write to
2139 * @inl: amount of bytes in @in to send
2141 * Returns -1 on error or the sent amount of bytes on success
2143 static int dgram_sctp_write(BIO *b, const char *in, int inl)
2146 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
2147 struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo);
2148 struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo);
2149 struct bio_dgram_sctp_sndinfo handshake_sinfo;
2150 struct iovec iov[1];
2152 struct cmsghdr *cmsg;
2153 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
2154 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) +
2155 CMSG_SPACE(sizeof(struct sctp_prinfo))];
2156 struct sctp_sndinfo *sndinfo;
2157 struct sctp_prinfo *prinfo;
2159 char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))];
2160 struct sctp_sndrcvinfo *sndrcvinfo;
2163 clear_socket_error();
2166 * If we're send anything else than application data, disable all user
2167 * parameters and flags.
2170 memset(&handshake_sinfo, 0, sizeof(handshake_sinfo));
2171 # ifdef SCTP_SACK_IMMEDIATELY
2172 handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY;
2174 sinfo = &handshake_sinfo;
2177 /* We can only send a shutdown alert if the socket is dry */
2178 if (data->save_shutdown) {
2179 ret = BIO_dgram_sctp_wait_for_dry(b);
2183 BIO_clear_retry_flags(b);
2184 BIO_set_retry_write(b);
2189 iov[0].iov_base = (char *)in;
2190 iov[0].iov_len = inl;
2191 msg.msg_name = NULL;
2192 msg.msg_namelen = 0;
2195 msg.msg_control = (caddr_t) cmsgbuf;
2196 msg.msg_controllen = 0;
2198 # if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO)
2199 cmsg = (struct cmsghdr *)cmsgbuf;
2200 cmsg->cmsg_level = IPPROTO_SCTP;
2201 cmsg->cmsg_type = SCTP_SNDINFO;
2202 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo));
2203 sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg);
2204 memset(sndinfo, 0, sizeof(*sndinfo));
2205 sndinfo->snd_sid = sinfo->snd_sid;
2206 sndinfo->snd_flags = sinfo->snd_flags;
2207 sndinfo->snd_ppid = sinfo->snd_ppid;
2208 sndinfo->snd_context = sinfo->snd_context;
2209 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo));
2212 (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))];
2213 cmsg->cmsg_level = IPPROTO_SCTP;
2214 cmsg->cmsg_type = SCTP_PRINFO;
2215 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo));
2216 prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg);
2217 memset(prinfo, 0, sizeof(*prinfo));
2218 prinfo->pr_policy = pinfo->pr_policy;
2219 prinfo->pr_value = pinfo->pr_value;
2220 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo));
2222 cmsg = (struct cmsghdr *)cmsgbuf;
2223 cmsg->cmsg_level = IPPROTO_SCTP;
2224 cmsg->cmsg_type = SCTP_SNDRCV;
2225 cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo));
2226 sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg);
2227 memset(sndrcvinfo, 0, sizeof(*sndrcvinfo));
2228 sndrcvinfo->sinfo_stream = sinfo->snd_sid;
2229 sndrcvinfo->sinfo_flags = sinfo->snd_flags;
2231 sndrcvinfo->sinfo_flags |= pinfo->pr_policy;
2233 sndrcvinfo->sinfo_ppid = sinfo->snd_ppid;
2234 sndrcvinfo->sinfo_context = sinfo->snd_context;
2235 sndrcvinfo->sinfo_timetolive = pinfo->pr_value;
2236 msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo));
2239 ret = sendmsg(b->num, &msg, 0);
2241 BIO_clear_retry_flags(b);
2243 if (BIO_dgram_should_retry(ret)) {
2244 BIO_set_retry_write(b);
2245 data->_errno = get_last_socket_error();
2251 static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr)
2254 bio_dgram_sctp_data *data = NULL;
2255 socklen_t sockopt_len = 0;
2256 struct sctp_authkeyid authkeyid;
2257 struct sctp_authkey *authkey = NULL;
2259 data = (bio_dgram_sctp_data *) b->ptr;
2262 case BIO_CTRL_DGRAM_QUERY_MTU:
2264 * Set to maximum (2^14) and ignore user input to enable transport
2265 * protocol fragmentation. Returns always 2^14.
2270 case BIO_CTRL_DGRAM_SET_MTU:
2272 * Set to maximum (2^14) and ignore input to enable transport
2273 * protocol fragmentation. Returns always 2^14.
2278 case BIO_CTRL_DGRAM_SET_CONNECTED:
2279 case BIO_CTRL_DGRAM_CONNECT:
2280 /* Returns always -1. */
2283 case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT:
2285 * SCTP doesn't need the DTLS timer Returns always 1.
2288 case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD:
2290 * We allow transport protocol fragmentation so this is irrelevant
2294 case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE:
2296 data->in_handshake = 1;
2298 data->in_handshake = 0;
2301 setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY,
2302 &data->in_handshake, sizeof(int));
2304 case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY:
2306 * New shared key for SCTP AUTH. Returns 0 on success, -1 otherwise.
2309 /* Get active key */
2310 sockopt_len = sizeof(struct sctp_authkeyid);
2312 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
2318 sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t);
2319 authkey = OPENSSL_malloc(sockopt_len);
2320 if (authkey == NULL) {
2324 memset(authkey, 0, sockopt_len);
2325 authkey->sca_keynumber = authkeyid.scact_keynumber + 1;
2326 # ifndef __FreeBSD__
2328 * This field is missing in FreeBSD 8.2 and earlier, and FreeBSD 8.3
2329 * and higher work without it.
2331 authkey->sca_keylength = 64;
2333 memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t));
2336 setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey,
2338 OPENSSL_free(authkey);
2343 /* Reset active key */
2344 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
2345 &authkeyid, sizeof(struct sctp_authkeyid));
2350 case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY:
2351 /* Returns 0 on success, -1 otherwise. */
2353 /* Get active key */
2354 sockopt_len = sizeof(struct sctp_authkeyid);
2356 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid,
2361 /* Set active key */
2362 authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1;
2363 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
2364 &authkeyid, sizeof(struct sctp_authkeyid));
2369 * CCS has been sent, so remember that and fall through to check if
2370 * we need to deactivate an old key
2375 case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD:
2376 /* Returns 0 on success, -1 otherwise. */
2379 * Has this command really been called or is this just a
2382 if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD)
2386 * CSS has been both, received and sent, so deactivate an old key
2388 if (data->ccs_rcvd == 1 && data->ccs_sent == 1) {
2389 /* Get active key */
2390 sockopt_len = sizeof(struct sctp_authkeyid);
2392 getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY,
2393 &authkeyid, &sockopt_len);
2398 * Deactivate key or delete second last key if
2399 * SCTP_AUTHENTICATION_EVENT is not available.
2401 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
2402 # ifdef SCTP_AUTH_DEACTIVATE_KEY
2403 sockopt_len = sizeof(struct sctp_authkeyid);
2404 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY,
2405 &authkeyid, sockopt_len);
2409 # ifndef SCTP_AUTHENTICATION_EVENT
2410 if (authkeyid.scact_keynumber > 0) {
2411 authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1;
2412 ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY,
2413 &authkeyid, sizeof(struct sctp_authkeyid));
2423 case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO:
2424 /* Returns the size of the copied struct. */
2425 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
2426 num = sizeof(struct bio_dgram_sctp_sndinfo);
2428 memcpy(ptr, &(data->sndinfo), num);
2431 case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO:
2432 /* Returns the size of the copied struct. */
2433 if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo))
2434 num = sizeof(struct bio_dgram_sctp_sndinfo);
2436 memcpy(&(data->sndinfo), ptr, num);
2438 case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO:
2439 /* Returns the size of the copied struct. */
2440 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
2441 num = sizeof(struct bio_dgram_sctp_rcvinfo);
2443 memcpy(ptr, &data->rcvinfo, num);
2447 case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO:
2448 /* Returns the size of the copied struct. */
2449 if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo))
2450 num = sizeof(struct bio_dgram_sctp_rcvinfo);
2452 memcpy(&(data->rcvinfo), ptr, num);
2454 case BIO_CTRL_DGRAM_SCTP_GET_PRINFO:
2455 /* Returns the size of the copied struct. */
2456 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
2457 num = sizeof(struct bio_dgram_sctp_prinfo);
2459 memcpy(ptr, &(data->prinfo), num);
2462 case BIO_CTRL_DGRAM_SCTP_SET_PRINFO:
2463 /* Returns the size of the copied struct. */
2464 if (num > (long)sizeof(struct bio_dgram_sctp_prinfo))
2465 num = sizeof(struct bio_dgram_sctp_prinfo);
2467 memcpy(&(data->prinfo), ptr, num);
2469 case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN:
2470 /* Returns always 1. */
2472 data->save_shutdown = 1;
2474 data->save_shutdown = 0;
2476 case BIO_CTRL_DGRAM_SCTP_WAIT_FOR_DRY:
2477 return dgram_sctp_wait_for_dry(b);
2478 case BIO_CTRL_DGRAM_SCTP_MSG_WAITING:
2479 return dgram_sctp_msg_waiting(b);
2483 * Pass to default ctrl function to process SCTP unspecific commands
2485 ret = dgram_ctrl(b, cmd, num, ptr);
2491 int BIO_dgram_sctp_notification_cb(BIO *b,
2492 BIO_dgram_sctp_notification_handler_fn handle_notifications,
2495 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
2497 if (handle_notifications != NULL) {
2498 data->handle_notifications = handle_notifications;
2499 data->notification_context = context;
2507 * BIO_dgram_sctp_wait_for_dry - Wait for SCTP SENDER_DRY event
2508 * @b: The BIO to check for the dry event
2510 * Wait until the peer confirms all packets have been received, and so that
2511 * our kernel doesn't have anything to send anymore. This is only received by
2512 * the peer's kernel, not the application.
2516 * 0 when not dry yet
2519 int BIO_dgram_sctp_wait_for_dry(BIO *b)
2521 return (int)BIO_ctrl(b, BIO_CTRL_DGRAM_SCTP_WAIT_FOR_DRY, 0, NULL);
2524 static int dgram_sctp_wait_for_dry(BIO *b)
2529 union sctp_notification snp;
2533 struct sctp_event event;
2535 struct sctp_event_subscribe event;
2536 socklen_t eventsize;
2538 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
2540 /* set sender dry event */
2542 memset(&event, 0, sizeof(event));
2543 event.se_assoc_id = 0;
2544 event.se_type = SCTP_SENDER_DRY_EVENT;
2547 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
2548 sizeof(struct sctp_event));
2550 eventsize = sizeof(struct sctp_event_subscribe);
2551 ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize);
2555 event.sctp_sender_dry_event = 1;
2558 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
2559 sizeof(struct sctp_event_subscribe));
2564 /* peek for notification */
2565 memset(&snp, 0, sizeof(snp));
2566 iov.iov_base = (char *)&snp;
2567 iov.iov_len = sizeof(union sctp_notification);
2568 msg.msg_name = NULL;
2569 msg.msg_namelen = 0;
2572 msg.msg_control = NULL;
2573 msg.msg_controllen = 0;
2576 n = recvmsg(b->num, &msg, MSG_PEEK);
2578 if ((n < 0) && (get_last_socket_error() != EAGAIN)
2579 && (get_last_socket_error() != EWOULDBLOCK))
2585 /* if we find a notification, process it and try again if necessary */
2586 while (msg.msg_flags & MSG_NOTIFICATION) {
2587 memset(&snp, 0, sizeof(snp));
2588 iov.iov_base = (char *)&snp;
2589 iov.iov_len = sizeof(union sctp_notification);
2590 msg.msg_name = NULL;
2591 msg.msg_namelen = 0;
2594 msg.msg_control = NULL;
2595 msg.msg_controllen = 0;
2598 n = recvmsg(b->num, &msg, 0);
2600 if ((n < 0) && (get_last_socket_error() != EAGAIN)
2601 && (get_last_socket_error() != EWOULDBLOCK))
2607 if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) {
2610 /* disable sender dry event */
2612 memset(&event, 0, sizeof(event));
2613 event.se_assoc_id = 0;
2614 event.se_type = SCTP_SENDER_DRY_EVENT;
2617 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event,
2618 sizeof(struct sctp_event));
2620 eventsize = (socklen_t) sizeof(struct sctp_event_subscribe);
2622 getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
2627 event.sctp_sender_dry_event = 0;
2630 setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event,
2631 sizeof(struct sctp_event_subscribe));
2636 # ifdef SCTP_AUTHENTICATION_EVENT
2637 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
2638 dgram_sctp_handle_auth_free_key_event(b, &snp);
2641 if (data->handle_notifications != NULL)
2642 data->handle_notifications(b, data->notification_context,
2645 /* found notification, peek again */
2646 memset(&snp, 0, sizeof(snp));
2647 iov.iov_base = (char *)&snp;
2648 iov.iov_len = sizeof(union sctp_notification);
2649 msg.msg_name = NULL;
2650 msg.msg_namelen = 0;
2653 msg.msg_control = NULL;
2654 msg.msg_controllen = 0;
2657 /* if we have seen the dry already, don't wait */
2659 sockflags = fcntl(b->num, F_GETFL, 0);
2660 fcntl(b->num, F_SETFL, O_NONBLOCK);
2663 n = recvmsg(b->num, &msg, MSG_PEEK);
2666 fcntl(b->num, F_SETFL, sockflags);
2670 if ((n < 0) && (get_last_socket_error() != EAGAIN)
2671 && (get_last_socket_error() != EWOULDBLOCK))
2678 /* read anything else */
2682 int BIO_dgram_sctp_msg_waiting(BIO *b)
2684 return (int)BIO_ctrl(b, BIO_CTRL_DGRAM_SCTP_MSG_WAITING, 0, NULL);
2687 static int dgram_sctp_msg_waiting(BIO *b)
2690 union sctp_notification snp;
2693 bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr;
2695 /* Check if there are any messages waiting to be read */
2697 memset(&snp, 0, sizeof(snp));
2698 iov.iov_base = (char *)&snp;
2699 iov.iov_len = sizeof(union sctp_notification);
2700 msg.msg_name = NULL;
2701 msg.msg_namelen = 0;
2704 msg.msg_control = NULL;
2705 msg.msg_controllen = 0;
2708 sockflags = fcntl(b->num, F_GETFL, 0);
2709 fcntl(b->num, F_SETFL, O_NONBLOCK);
2710 n = recvmsg(b->num, &msg, MSG_PEEK);
2711 fcntl(b->num, F_SETFL, sockflags);
2713 /* if notification, process and try again */
2714 if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)) {
2715 # ifdef SCTP_AUTHENTICATION_EVENT
2716 if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT)
2717 dgram_sctp_handle_auth_free_key_event(b, &snp);
2720 memset(&snp, 0, sizeof(snp));
2721 iov.iov_base = (char *)&snp;
2722 iov.iov_len = sizeof(union sctp_notification);
2723 msg.msg_name = NULL;
2724 msg.msg_namelen = 0;
2727 msg.msg_control = NULL;
2728 msg.msg_controllen = 0;
2730 n = recvmsg(b->num, &msg, 0);
2732 if (data->handle_notifications != NULL)
2733 data->handle_notifications(b, data->notification_context,
2737 } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION));
2739 /* Return 1 if there is a message to be read, return 0 otherwise. */
2746 static int dgram_sctp_puts(BIO *bp, const char *str)
2751 ret = dgram_sctp_write(bp, str, n);
2756 static int BIO_dgram_should_retry(int i)
2760 if ((i == 0) || (i == -1)) {
2761 err = get_last_socket_error();
2763 # if defined(OPENSSL_SYS_WINDOWS)
2765 * If the socket return value (i) is -1 and err is unexpectedly 0 at
2766 * this point, the error code was overwritten by another system call
2767 * before this error handling is called.
2771 return BIO_dgram_non_fatal_error(err);
2776 int BIO_dgram_non_fatal_error(int err)
2779 # if defined(OPENSSL_SYS_WINDOWS)
2780 # if defined(WSAEWOULDBLOCK)
2781 case WSAEWOULDBLOCK:
2786 # ifdef WSAEWOULDBLOCK
2787 # if WSAEWOULDBLOCK != EWOULDBLOCK
2800 # if EWOULDBLOCK != EAGAIN