diff options
Diffstat (limited to 'openssl/crypto/bio/bss_dgram.c')
| -rw-r--r-- | openssl/crypto/bio/bss_dgram.c | 2081 |
1 files changed, 2081 insertions, 0 deletions
diff --git a/openssl/crypto/bio/bss_dgram.c b/openssl/crypto/bio/bss_dgram.c new file mode 100644 index 0000000..bdd7bf8 --- /dev/null +++ b/openssl/crypto/bio/bss_dgram.c @@ -0,0 +1,2081 @@ +/* crypto/bio/bio_dgram.c */ +/* + * DTLS implementation written by Nagendra Modadugu + * (nagendra@cs.stanford.edu) for the OpenSSL project 2005. + */ +/* ==================================================================== + * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * openssl-core@OpenSSL.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ + +#include <stdio.h> +#include <errno.h> +#define USE_SOCKETS +#include "cryptlib.h" + +#include <openssl/bio.h> +#ifndef OPENSSL_NO_DGRAM + +# if defined(OPENSSL_SYS_VMS) +# include <sys/timeb.h> +# endif + +# ifndef OPENSSL_NO_SCTP +# include <netinet/sctp.h> +# include <fcntl.h> +# define OPENSSL_SCTP_DATA_CHUNK_TYPE 0x00 +# define OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE 0xc0 +# endif + +# if defined(OPENSSL_SYS_LINUX) && !defined(IP_MTU) +# define IP_MTU 14 /* linux is lame */ +# endif + +# if OPENSSL_USE_IPV6 && !defined(IPPROTO_IPV6) +# define IPPROTO_IPV6 41 /* windows is lame */ +# endif + +# if defined(__FreeBSD__) && defined(IN6_IS_ADDR_V4MAPPED) +/* Standard definition causes type-punning problems. */ +# undef IN6_IS_ADDR_V4MAPPED +# define s6_addr32 __u6_addr.__u6_addr32 +# define IN6_IS_ADDR_V4MAPPED(a) \ + (((a)->s6_addr32[0] == 0) && \ + ((a)->s6_addr32[1] == 0) && \ + ((a)->s6_addr32[2] == htonl(0x0000ffff))) +# endif + +# ifdef WATT32 +# define sock_write SockWrite /* Watt-32 uses same names */ +# define sock_read SockRead +# define sock_puts SockPuts +# endif + +static int dgram_write(BIO *h, const char *buf, int num); +static int dgram_read(BIO *h, char *buf, int size); +static int dgram_puts(BIO *h, const char *str); +static long dgram_ctrl(BIO *h, int cmd, long arg1, void *arg2); +static int dgram_new(BIO *h); +static int dgram_free(BIO *data); +static int dgram_clear(BIO *bio); + +# ifndef OPENSSL_NO_SCTP +static int dgram_sctp_write(BIO *h, const char *buf, int num); +static int dgram_sctp_read(BIO *h, char *buf, int size); +static int dgram_sctp_puts(BIO *h, const char *str); +static long dgram_sctp_ctrl(BIO *h, int cmd, long arg1, void *arg2); +static int dgram_sctp_new(BIO *h); +static int dgram_sctp_free(BIO *data); +# ifdef SCTP_AUTHENTICATION_EVENT +static void dgram_sctp_handle_auth_free_key_event(BIO *b, union sctp_notification + *snp); +# endif +# endif + +static int BIO_dgram_should_retry(int s); + +static void get_current_time(struct timeval *t); + +static BIO_METHOD methods_dgramp = { + BIO_TYPE_DGRAM, + "datagram socket", + dgram_write, + dgram_read, + dgram_puts, + NULL, /* dgram_gets, */ + dgram_ctrl, + dgram_new, + dgram_free, + NULL, +}; + +# ifndef OPENSSL_NO_SCTP +static BIO_METHOD methods_dgramp_sctp = { + BIO_TYPE_DGRAM_SCTP, + "datagram sctp socket", + dgram_sctp_write, + dgram_sctp_read, + dgram_sctp_puts, + NULL, /* dgram_gets, */ + dgram_sctp_ctrl, + dgram_sctp_new, + dgram_sctp_free, + NULL, +}; +# endif + +typedef struct bio_dgram_data_st { + union { + struct sockaddr sa; + struct sockaddr_in sa_in; +# if OPENSSL_USE_IPV6 + struct sockaddr_in6 sa_in6; +# endif + } peer; + unsigned int connected; + unsigned int _errno; + unsigned int mtu; + struct timeval next_timeout; + struct timeval socket_timeout; +} bio_dgram_data; + +# ifndef OPENSSL_NO_SCTP +typedef struct bio_dgram_sctp_save_message_st { + BIO *bio; + char *data; + int length; +} bio_dgram_sctp_save_message; + +typedef struct bio_dgram_sctp_data_st { + union { + struct sockaddr sa; + struct sockaddr_in sa_in; +# if OPENSSL_USE_IPV6 + struct sockaddr_in6 sa_in6; +# endif + } peer; + unsigned int connected; + unsigned int _errno; + unsigned int mtu; + struct bio_dgram_sctp_sndinfo sndinfo; + struct bio_dgram_sctp_rcvinfo rcvinfo; + struct bio_dgram_sctp_prinfo prinfo; + void (*handle_notifications) (BIO *bio, void *context, void *buf); + void *notification_context; + int in_handshake; + int ccs_rcvd; + int ccs_sent; + int save_shutdown; + int peer_auth_tested; + bio_dgram_sctp_save_message saved_message; +} bio_dgram_sctp_data; +# endif + +BIO_METHOD *BIO_s_datagram(void) +{ + return (&methods_dgramp); +} + +BIO *BIO_new_dgram(int fd, int close_flag) +{ + BIO *ret; + + ret = BIO_new(BIO_s_datagram()); + if (ret == NULL) + return (NULL); + BIO_set_fd(ret, fd, close_flag); + return (ret); +} + +static int dgram_new(BIO *bi) +{ + bio_dgram_data *data = NULL; + + bi->init = 0; + bi->num = 0; + data = OPENSSL_malloc(sizeof(bio_dgram_data)); + if (data == NULL) + return 0; + memset(data, 0x00, sizeof(bio_dgram_data)); + bi->ptr = data; + + bi->flags = 0; + return (1); +} + +static int dgram_free(BIO *a) +{ + bio_dgram_data *data; + + if (a == NULL) + return (0); + if (!dgram_clear(a)) + return 0; + + data = (bio_dgram_data *)a->ptr; + if (data != NULL) + OPENSSL_free(data); + + return (1); +} + +static int dgram_clear(BIO *a) +{ + if (a == NULL) + return (0); + if (a->shutdown) { + if (a->init) { + SHUTDOWN2(a->num); + } + a->init = 0; + a->flags = 0; + } + return (1); +} + +static void dgram_adjust_rcv_timeout(BIO *b) +{ +# if defined(SO_RCVTIMEO) + bio_dgram_data *data = (bio_dgram_data *)b->ptr; + union { + size_t s; + int i; + } sz = { + 0 + }; + + /* Is a timer active? */ + if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) { + struct timeval timenow, timeleft; + + /* Read current socket timeout */ +# ifdef OPENSSL_SYS_WINDOWS + int timeout; + + sz.i = sizeof(timeout); + if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, + (void *)&timeout, &sz.i) < 0) { + perror("getsockopt"); + } else { + data->socket_timeout.tv_sec = timeout / 1000; + data->socket_timeout.tv_usec = (timeout % 1000) * 1000; + } +# else + sz.i = sizeof(data->socket_timeout); + if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, + &(data->socket_timeout), (void *)&sz) < 0) { + perror("getsockopt"); + } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) + OPENSSL_assert(sz.s <= sizeof(data->socket_timeout)); +# endif + + /* Get current time */ + get_current_time(&timenow); + + /* Calculate time left until timer expires */ + memcpy(&timeleft, &(data->next_timeout), sizeof(struct timeval)); + if (timeleft.tv_usec < timenow.tv_usec) { + timeleft.tv_usec = 1000000 - timenow.tv_usec + timeleft.tv_usec; + timeleft.tv_sec--; + } else { + timeleft.tv_usec -= timenow.tv_usec; + } + if (timeleft.tv_sec < timenow.tv_sec) { + timeleft.tv_sec = 0; + timeleft.tv_usec = 1; + } else { + timeleft.tv_sec -= timenow.tv_sec; + } + + /* + * Adjust socket timeout if next handhake message timer will expire + * earlier. + */ + if ((data->socket_timeout.tv_sec == 0 + && data->socket_timeout.tv_usec == 0) + || (data->socket_timeout.tv_sec > timeleft.tv_sec) + || (data->socket_timeout.tv_sec == timeleft.tv_sec + && data->socket_timeout.tv_usec >= timeleft.tv_usec)) { +# ifdef OPENSSL_SYS_WINDOWS + timeout = timeleft.tv_sec * 1000 + timeleft.tv_usec / 1000; + if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, + (void *)&timeout, sizeof(timeout)) < 0) { + perror("setsockopt"); + } +# else + if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, &timeleft, + sizeof(struct timeval)) < 0) { + perror("setsockopt"); + } +# endif + } + } +# endif +} + +static void dgram_reset_rcv_timeout(BIO *b) +{ +# if defined(SO_RCVTIMEO) + bio_dgram_data *data = (bio_dgram_data *)b->ptr; + + /* Is a timer active? */ + if (data->next_timeout.tv_sec > 0 || data->next_timeout.tv_usec > 0) { +# ifdef OPENSSL_SYS_WINDOWS + int timeout = data->socket_timeout.tv_sec * 1000 + + data->socket_timeout.tv_usec / 1000; + if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, + (void *)&timeout, sizeof(timeout)) < 0) { + perror("setsockopt"); + } +# else + if (setsockopt + (b->num, SOL_SOCKET, SO_RCVTIMEO, &(data->socket_timeout), + sizeof(struct timeval)) < 0) { + perror("setsockopt"); + } +# endif + } +# endif +} + +static int dgram_read(BIO *b, char *out, int outl) +{ + int ret = 0; + bio_dgram_data *data = (bio_dgram_data *)b->ptr; + + struct { + /* + * See commentary in b_sock.c. <appro> + */ + union { + size_t s; + int i; + } len; + union { + struct sockaddr sa; + struct sockaddr_in sa_in; +# if OPENSSL_USE_IPV6 + struct sockaddr_in6 sa_in6; +# endif + } peer; + } sa; + + sa.len.s = 0; + sa.len.i = sizeof(sa.peer); + + if (out != NULL) { + clear_socket_error(); + memset(&sa.peer, 0x00, sizeof(sa.peer)); + dgram_adjust_rcv_timeout(b); + ret = recvfrom(b->num, out, outl, 0, &sa.peer.sa, (void *)&sa.len); + if (sizeof(sa.len.i) != sizeof(sa.len.s) && sa.len.i == 0) { + OPENSSL_assert(sa.len.s <= sizeof(sa.peer)); + sa.len.i = (int)sa.len.s; + } + + if (!data->connected && ret >= 0) + BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, &sa.peer); + + BIO_clear_retry_flags(b); + if (ret < 0) { + if (BIO_dgram_should_retry(ret)) { + BIO_set_retry_read(b); + data->_errno = get_last_socket_error(); + } + } + + dgram_reset_rcv_timeout(b); + } + return (ret); +} + +static int dgram_write(BIO *b, const char *in, int inl) +{ + int ret; + bio_dgram_data *data = (bio_dgram_data *)b->ptr; + clear_socket_error(); + + if (data->connected) + ret = writesocket(b->num, in, inl); + else { + int peerlen = sizeof(data->peer); + + if (data->peer.sa.sa_family == AF_INET) + peerlen = sizeof(data->peer.sa_in); +# if OPENSSL_USE_IPV6 + else if (data->peer.sa.sa_family == AF_INET6) + peerlen = sizeof(data->peer.sa_in6); +# endif +# if defined(NETWARE_CLIB) && defined(NETWARE_BSDSOCK) + ret = sendto(b->num, (char *)in, inl, 0, &data->peer.sa, peerlen); +# else + ret = sendto(b->num, in, inl, 0, &data->peer.sa, peerlen); +# endif + } + + BIO_clear_retry_flags(b); + if (ret <= 0) { + if (BIO_dgram_should_retry(ret)) { + BIO_set_retry_write(b); + data->_errno = get_last_socket_error(); + +# if 0 /* higher layers are responsible for querying + * MTU, if necessary */ + if (data->_errno == EMSGSIZE) + /* retrieve the new MTU */ + BIO_ctrl(b, BIO_CTRL_DGRAM_QUERY_MTU, 0, NULL); +# endif + } + } + return (ret); +} + +static long dgram_get_mtu_overhead(bio_dgram_data *data) +{ + long ret; + + switch (data->peer.sa.sa_family) { + case AF_INET: + /* + * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP + */ + ret = 28; + break; +# if OPENSSL_USE_IPV6 + case AF_INET6: +# ifdef IN6_IS_ADDR_V4MAPPED + if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr)) + /* + * Assume this is UDP - 20 bytes for IP, 8 bytes for UDP + */ + ret = 28; + else +# endif + /* + * Assume this is UDP - 40 bytes for IP, 8 bytes for UDP + */ + ret = 48; + break; +# endif + default: + /* We don't know. Go with the historical default */ + ret = 28; + break; + } + return ret; +} + +static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr) +{ + long ret = 1; + int *ip; + struct sockaddr *to = NULL; + bio_dgram_data *data = NULL; + int sockopt_val = 0; +# if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU)) + socklen_t sockopt_len; /* assume that system supporting IP_MTU is + * modern enough to define socklen_t */ + socklen_t addr_len; + union { + struct sockaddr sa; + struct sockaddr_in s4; +# if OPENSSL_USE_IPV6 + struct sockaddr_in6 s6; +# endif + } addr; +# endif + + data = (bio_dgram_data *)b->ptr; + + switch (cmd) { + case BIO_CTRL_RESET: + num = 0; + ret = 0; + break; + case BIO_CTRL_INFO: + ret = 0; + break; + case BIO_C_SET_FD: + dgram_clear(b); + b->num = *((int *)ptr); + b->shutdown = (int)num; + b->init = 1; + break; + case BIO_C_GET_FD: + if (b->init) { + ip = (int *)ptr; + if (ip != NULL) + *ip = b->num; + ret = b->num; + } else + ret = -1; + break; + case BIO_CTRL_GET_CLOSE: + ret = b->shutdown; + break; + case BIO_CTRL_SET_CLOSE: + b->shutdown = (int)num; + break; + case BIO_CTRL_PENDING: + case BIO_CTRL_WPENDING: + ret = 0; + break; + case BIO_CTRL_DUP: + case BIO_CTRL_FLUSH: + ret = 1; + break; + case BIO_CTRL_DGRAM_CONNECT: + to = (struct sockaddr *)ptr; +# if 0 + if (connect(b->num, to, sizeof(struct sockaddr)) < 0) { + perror("connect"); + ret = 0; + } else { +# endif + switch (to->sa_family) { + case AF_INET: + memcpy(&data->peer, to, sizeof(data->peer.sa_in)); + break; +# if OPENSSL_USE_IPV6 + case AF_INET6: + memcpy(&data->peer, to, sizeof(data->peer.sa_in6)); + break; +# endif + default: + memcpy(&data->peer, to, sizeof(data->peer.sa)); + break; + } +# if 0 + } +# endif + break; + /* (Linux)kernel sets DF bit on outgoing IP packets */ + case BIO_CTRL_DGRAM_MTU_DISCOVER: +# if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO) + addr_len = (socklen_t) sizeof(addr); + memset((void *)&addr, 0, sizeof(addr)); + if (getsockname(b->num, &addr.sa, &addr_len) < 0) { + ret = 0; + break; + } + switch (addr.sa.sa_family) { + case AF_INET: + sockopt_val = IP_PMTUDISC_DO; + if ((ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER, + &sockopt_val, sizeof(sockopt_val))) < 0) + perror("setsockopt"); + break; +# if OPENSSL_USE_IPV6 && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO) + case AF_INET6: + sockopt_val = IPV6_PMTUDISC_DO; + if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER, + &sockopt_val, sizeof(sockopt_val))) < 0) + perror("setsockopt"); + break; +# endif + default: + ret = -1; + break; + } + ret = -1; +# else + break; +# endif + case BIO_CTRL_DGRAM_QUERY_MTU: +# if defined(OPENSSL_SYS_LINUX) && defined(IP_MTU) + addr_len = (socklen_t) sizeof(addr); + memset((void *)&addr, 0, sizeof(addr)); + if (getsockname(b->num, &addr.sa, &addr_len) < 0) { + ret = 0; + break; + } + sockopt_len = sizeof(sockopt_val); + switch (addr.sa.sa_family) { + case AF_INET: + if ((ret = + getsockopt(b->num, IPPROTO_IP, IP_MTU, (void *)&sockopt_val, + &sockopt_len)) < 0 || sockopt_val < 0) { + ret = 0; + } else { + /* + * we assume that the transport protocol is UDP and no IP + * options are used. + */ + data->mtu = sockopt_val - 8 - 20; + ret = data->mtu; + } + break; +# if OPENSSL_USE_IPV6 && defined(IPV6_MTU) + case AF_INET6: + if ((ret = + getsockopt(b->num, IPPROTO_IPV6, IPV6_MTU, + (void *)&sockopt_val, &sockopt_len)) < 0 + || sockopt_val < 0) { + ret = 0; + } else { + /* + * we assume that the transport protocol is UDP and no IPV6 + * options are used. + */ + data->mtu = sockopt_val - 8 - 40; + ret = data->mtu; + } + break; +# endif + default: + ret = 0; + break; + } +# else + ret = 0; +# endif + break; + case BIO_CTRL_DGRAM_GET_FALLBACK_MTU: + ret = -dgram_get_mtu_overhead(data); + switch (data->peer.sa.sa_family) { + case AF_INET: + ret += 576; + break; +# if OPENSSL_USE_IPV6 + case AF_INET6: +# ifdef IN6_IS_ADDR_V4MAPPED + if (IN6_IS_ADDR_V4MAPPED(&data->peer.sa_in6.sin6_addr)) + ret += 576; + else +# endif + ret += 1280; + break; +# endif + default: + ret += 576; + break; + } + break; + case BIO_CTRL_DGRAM_GET_MTU: + return data->mtu; + break; + case BIO_CTRL_DGRAM_SET_MTU: + data->mtu = num; + ret = num; + break; + case BIO_CTRL_DGRAM_SET_CONNECTED: + to = (struct sockaddr *)ptr; + + if (to != NULL) { + data->connected = 1; + switch (to->sa_family) { + case AF_INET: + memcpy(&data->peer, to, sizeof(data->peer.sa_in)); + break; +# if OPENSSL_USE_IPV6 + case AF_INET6: + memcpy(&data->peer, to, sizeof(data->peer.sa_in6)); + break; +# endif + default: + memcpy(&data->peer, to, sizeof(data->peer.sa)); + break; + } + } else { + data->connected = 0; + memset(&(data->peer), 0x00, sizeof(data->peer)); + } + break; + case BIO_CTRL_DGRAM_GET_PEER: + switch (data->peer.sa.sa_family) { + case AF_INET: + ret = sizeof(data->peer.sa_in); + break; +# if OPENSSL_USE_IPV6 + case AF_INET6: + ret = sizeof(data->peer.sa_in6); + break; +# endif + default: + ret = sizeof(data->peer.sa); + break; + } + if (num == 0 || num > ret) + num = ret; + memcpy(ptr, &data->peer, (ret = num)); + break; + case BIO_CTRL_DGRAM_SET_PEER: + to = (struct sockaddr *)ptr; + switch (to->sa_family) { + case AF_INET: + memcpy(&data->peer, to, sizeof(data->peer.sa_in)); + break; +# if OPENSSL_USE_IPV6 + case AF_INET6: + memcpy(&data->peer, to, sizeof(data->peer.sa_in6)); + break; +# endif + default: + memcpy(&data->peer, to, sizeof(data->peer.sa)); + break; + } + break; + case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT: + memcpy(&(data->next_timeout), ptr, sizeof(struct timeval)); + break; +# if defined(SO_RCVTIMEO) + case BIO_CTRL_DGRAM_SET_RECV_TIMEOUT: +# ifdef OPENSSL_SYS_WINDOWS + { + struct timeval *tv = (struct timeval *)ptr; + int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000; + if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, + (void *)&timeout, sizeof(timeout)) < 0) { + perror("setsockopt"); + ret = -1; + } + } +# else + if (setsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, ptr, + sizeof(struct timeval)) < 0) { + perror("setsockopt"); + ret = -1; + } +# endif + break; + case BIO_CTRL_DGRAM_GET_RECV_TIMEOUT: + { + union { + size_t s; + int i; + } sz = { + 0 + }; +# ifdef OPENSSL_SYS_WINDOWS + int timeout; + struct timeval *tv = (struct timeval *)ptr; + + sz.i = sizeof(timeout); + if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, + (void *)&timeout, &sz.i) < 0) { + perror("getsockopt"); + ret = -1; + } else { + tv->tv_sec = timeout / 1000; + tv->tv_usec = (timeout % 1000) * 1000; + ret = sizeof(*tv); + } +# else + sz.i = sizeof(struct timeval); + if (getsockopt(b->num, SOL_SOCKET, SO_RCVTIMEO, + ptr, (void *)&sz) < 0) { + perror("getsockopt"); + ret = -1; + } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) { + OPENSSL_assert(sz.s <= sizeof(struct timeval)); + ret = (int)sz.s; + } else + ret = sz.i; +# endif + } + break; +# endif +# if defined(SO_SNDTIMEO) + case BIO_CTRL_DGRAM_SET_SEND_TIMEOUT: +# ifdef OPENSSL_SYS_WINDOWS + { + struct timeval *tv = (struct timeval *)ptr; + int timeout = tv->tv_sec * 1000 + tv->tv_usec / 1000; + if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, + (void *)&timeout, sizeof(timeout)) < 0) { + perror("setsockopt"); + ret = -1; + } + } +# else + if (setsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, ptr, + sizeof(struct timeval)) < 0) { + perror("setsockopt"); + ret = -1; + } +# endif + break; + case BIO_CTRL_DGRAM_GET_SEND_TIMEOUT: + { + union { + size_t s; + int i; + } sz = { + 0 + }; +# ifdef OPENSSL_SYS_WINDOWS + int timeout; + struct timeval *tv = (struct timeval *)ptr; + + sz.i = sizeof(timeout); + if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, + (void *)&timeout, &sz.i) < 0) { + perror("getsockopt"); + ret = -1; + } else { + tv->tv_sec = timeout / 1000; + tv->tv_usec = (timeout % 1000) * 1000; + ret = sizeof(*tv); + } +# else + sz.i = sizeof(struct timeval); + if (getsockopt(b->num, SOL_SOCKET, SO_SNDTIMEO, + ptr, (void *)&sz) < 0) { + perror("getsockopt"); + ret = -1; + } else if (sizeof(sz.s) != sizeof(sz.i) && sz.i == 0) { + OPENSSL_assert(sz.s <= sizeof(struct timeval)); + ret = (int)sz.s; + } else + ret = sz.i; +# endif + } + break; +# endif + case BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP: + /* fall-through */ + case BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP: +# ifdef OPENSSL_SYS_WINDOWS + if (data->_errno == WSAETIMEDOUT) +# else + if (data->_errno == EAGAIN) +# endif + { + ret = 1; + data->_errno = 0; + } else + ret = 0; + break; +# ifdef EMSGSIZE + case BIO_CTRL_DGRAM_MTU_EXCEEDED: + if (data->_errno == EMSGSIZE) { + ret = 1; + data->_errno = 0; + } else + ret = 0; + break; +# endif + case BIO_CTRL_DGRAM_SET_DONT_FRAG: + sockopt_val = num ? 1 : 0; + + switch (data->peer.sa.sa_family) { + case AF_INET: +# if defined(IP_DONTFRAG) + if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAG, + &sockopt_val, sizeof(sockopt_val))) < 0) { + perror("setsockopt"); + ret = -1; + } +# elif defined(OPENSSL_SYS_LINUX) && defined(IP_MTU_DISCOVER) && defined (IP_PMTUDISC_PROBE) + if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT), + (ret = setsockopt(b->num, IPPROTO_IP, IP_MTU_DISCOVER, + &sockopt_val, sizeof(sockopt_val))) < 0) { + perror("setsockopt"); + ret = -1; + } +# elif defined(OPENSSL_SYS_WINDOWS) && defined(IP_DONTFRAGMENT) + if ((ret = setsockopt(b->num, IPPROTO_IP, IP_DONTFRAGMENT, + (const char *)&sockopt_val, + sizeof(sockopt_val))) < 0) { + perror("setsockopt"); + ret = -1; + } +# else + ret = -1; +# endif + break; +# if OPENSSL_USE_IPV6 + case AF_INET6: +# if defined(IPV6_DONTFRAG) + if ((ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_DONTFRAG, + (const void *)&sockopt_val, + sizeof(sockopt_val))) < 0) { + perror("setsockopt"); + ret = -1; + } +# elif defined(OPENSSL_SYS_LINUX) && defined(IPV6_MTUDISCOVER) + if ((sockopt_val = num ? IP_PMTUDISC_PROBE : IP_PMTUDISC_DONT), + (ret = setsockopt(b->num, IPPROTO_IPV6, IPV6_MTU_DISCOVER, + &sockopt_val, sizeof(sockopt_val))) < 0) { + perror("setsockopt"); + ret = -1; + } +# else + ret = -1; +# endif + break; +# endif + default: + ret = -1; + break; + } + break; + case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD: + ret = dgram_get_mtu_overhead(data); + break; + default: + ret = 0; + break; + } + return (ret); +} + +static int dgram_puts(BIO *bp, const char *str) +{ + int n, ret; + + n = strlen(str); + ret = dgram_write(bp, str, n); + return (ret); +} + +# ifndef OPENSSL_NO_SCTP +BIO_METHOD *BIO_s_datagram_sctp(void) +{ + return (&methods_dgramp_sctp); +} + +BIO *BIO_new_dgram_sctp(int fd, int close_flag) +{ + BIO *bio; + int ret, optval = 20000; + int auth_data = 0, auth_forward = 0; + unsigned char *p; + struct sctp_authchunk auth; + struct sctp_authchunks *authchunks; + socklen_t sockopt_len; +# ifdef SCTP_AUTHENTICATION_EVENT +# ifdef SCTP_EVENT + struct sctp_event event; +# else + struct sctp_event_subscribe event; +# endif +# endif + + bio = BIO_new(BIO_s_datagram_sctp()); + if (bio == NULL) + return (NULL); + BIO_set_fd(bio, fd, close_flag); + + /* Activate SCTP-AUTH for DATA and FORWARD-TSN chunks */ + auth.sauth_chunk = OPENSSL_SCTP_DATA_CHUNK_TYPE; + ret = + setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth, + sizeof(struct sctp_authchunk)); + if (ret < 0) { + BIO_vfree(bio); + return (NULL); + } + auth.sauth_chunk = OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE; + ret = + setsockopt(fd, IPPROTO_SCTP, SCTP_AUTH_CHUNK, &auth, + sizeof(struct sctp_authchunk)); + if (ret < 0) { + BIO_vfree(bio); + return (NULL); + } + + /* + * Test if activation was successful. When using accept(), SCTP-AUTH has + * to be activated for the listening socket already, otherwise the + * connected socket won't use it. + */ + sockopt_len = (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t)); + authchunks = OPENSSL_malloc(sockopt_len); + if (!authchunks) { + BIO_vfree(bio); + return (NULL); + } + memset(authchunks, 0, sizeof(sockopt_len)); + ret = + getsockopt(fd, IPPROTO_SCTP, SCTP_LOCAL_AUTH_CHUNKS, authchunks, + &sockopt_len); + + if (ret < 0) { + OPENSSL_free(authchunks); + BIO_vfree(bio); + return (NULL); + } + + for (p = (unsigned char *)authchunks->gauth_chunks; + p < (unsigned char *)authchunks + sockopt_len; + p += sizeof(uint8_t)) { + if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE) + auth_data = 1; + if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE) + auth_forward = 1; + } + + OPENSSL_free(authchunks); + + OPENSSL_assert(auth_data); + OPENSSL_assert(auth_forward); + +# ifdef SCTP_AUTHENTICATION_EVENT +# ifdef SCTP_EVENT + memset(&event, 0, sizeof(struct sctp_event)); + event.se_assoc_id = 0; + event.se_type = SCTP_AUTHENTICATION_EVENT; + event.se_on = 1; + ret = + setsockopt(fd, IPPROTO_SCTP, SCTP_EVENT, &event, + sizeof(struct sctp_event)); + if (ret < 0) { + BIO_vfree(bio); + return (NULL); + } +# else + sockopt_len = (socklen_t) sizeof(struct sctp_event_subscribe); + ret = getsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, &sockopt_len); + if (ret < 0) { + BIO_vfree(bio); + return (NULL); + } + + event.sctp_authentication_event = 1; + + ret = + setsockopt(fd, IPPROTO_SCTP, SCTP_EVENTS, &event, + sizeof(struct sctp_event_subscribe)); + if (ret < 0) { + BIO_vfree(bio); + return (NULL); + } +# endif +# endif + + /* + * Disable partial delivery by setting the min size larger than the max + * record size of 2^14 + 2048 + 13 + */ + ret = + setsockopt(fd, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, &optval, + sizeof(optval)); + if (ret < 0) { + BIO_vfree(bio); + return (NULL); + } + + return (bio); +} + +int BIO_dgram_is_sctp(BIO *bio) +{ + return (BIO_method_type(bio) == BIO_TYPE_DGRAM_SCTP); +} + +static int dgram_sctp_new(BIO *bi) +{ + bio_dgram_sctp_data *data = NULL; + + bi->init = 0; + bi->num = 0; + data = OPENSSL_malloc(sizeof(bio_dgram_sctp_data)); + if (data == NULL) + return 0; + memset(data, 0x00, sizeof(bio_dgram_sctp_data)); +# ifdef SCTP_PR_SCTP_NONE + data->prinfo.pr_policy = SCTP_PR_SCTP_NONE; +# endif + bi->ptr = data; + + bi->flags = 0; + return (1); +} + +static int dgram_sctp_free(BIO *a) +{ + bio_dgram_sctp_data *data; + + if (a == NULL) + return (0); + if (!dgram_clear(a)) + return 0; + + data = (bio_dgram_sctp_data *) a->ptr; + if (data != NULL) { + if (data->saved_message.data != NULL) + OPENSSL_free(data->saved_message.data); + OPENSSL_free(data); + } + + return (1); +} + +# ifdef SCTP_AUTHENTICATION_EVENT +void dgram_sctp_handle_auth_free_key_event(BIO *b, + union sctp_notification *snp) +{ + int ret; + struct sctp_authkey_event *authkeyevent = &snp->sn_auth_event; + + if (authkeyevent->auth_indication == SCTP_AUTH_FREE_KEY) { + struct sctp_authkeyid authkeyid; + + /* delete key */ + authkeyid.scact_keynumber = authkeyevent->auth_keynumber; + ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY, + &authkeyid, sizeof(struct sctp_authkeyid)); + } +} +# endif + +static int dgram_sctp_read(BIO *b, char *out, int outl) +{ + int ret = 0, n = 0, i, optval; + socklen_t optlen; + bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr; + union sctp_notification *snp; + struct msghdr msg; + struct iovec iov; + struct cmsghdr *cmsg; + char cmsgbuf[512]; + + if (out != NULL) { + clear_socket_error(); + + do { + memset(&data->rcvinfo, 0x00, + sizeof(struct bio_dgram_sctp_rcvinfo)); + iov.iov_base = out; + iov.iov_len = outl; + msg.msg_name = NULL; + msg.msg_namelen = 0; + msg.msg_iov = &iov; + msg.msg_iovlen = 1; + msg.msg_control = cmsgbuf; + msg.msg_controllen = 512; + msg.msg_flags = 0; + n = recvmsg(b->num, &msg, 0); + + if (n <= 0) { + if (n < 0) + ret = n; + break; + } + + if (msg.msg_controllen > 0) { + for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; + cmsg = CMSG_NXTHDR(&msg, cmsg)) { + if (cmsg->cmsg_level != IPPROTO_SCTP) + continue; +# ifdef SCTP_RCVINFO + if (cmsg->cmsg_type == SCTP_RCVINFO) { + struct sctp_rcvinfo *rcvinfo; + + rcvinfo = (struct sctp_rcvinfo *)CMSG_DATA(cmsg); + data->rcvinfo.rcv_sid = rcvinfo->rcv_sid; + data->rcvinfo.rcv_ssn = rcvinfo->rcv_ssn; + data->rcvinfo.rcv_flags = rcvinfo->rcv_flags; + data->rcvinfo.rcv_ppid = rcvinfo->rcv_ppid; + data->rcvinfo.rcv_tsn = rcvinfo->rcv_tsn; + data->rcvinfo.rcv_cumtsn = rcvinfo->rcv_cumtsn; + data->rcvinfo.rcv_context = rcvinfo->rcv_context; + } +# endif +# ifdef SCTP_SNDRCV + if (cmsg->cmsg_type == SCTP_SNDRCV) { + struct sctp_sndrcvinfo *sndrcvinfo; + + sndrcvinfo = + (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg); + data->rcvinfo.rcv_sid = sndrcvinfo->sinfo_stream; + data->rcvinfo.rcv_ssn = sndrcvinfo->sinfo_ssn; + data->rcvinfo.rcv_flags = sndrcvinfo->sinfo_flags; + data->rcvinfo.rcv_ppid = sndrcvinfo->sinfo_ppid; + data->rcvinfo.rcv_tsn = sndrcvinfo->sinfo_tsn; + data->rcvinfo.rcv_cumtsn = sndrcvinfo->sinfo_cumtsn; + data->rcvinfo.rcv_context = sndrcvinfo->sinfo_context; + } +# endif + } + } + + if (msg.msg_flags & MSG_NOTIFICATION) { + snp = (union sctp_notification *)out; + if (snp->sn_header.sn_type == SCTP_SENDER_DRY_EVENT) { +# ifdef SCTP_EVENT + struct sctp_event event; +# else + struct sctp_event_subscribe event; + socklen_t eventsize; +# endif + /* + * If a message has been delayed until the socket is dry, + * it can be sent now. + */ + if (data->saved_message.length > 0) { + dgram_sctp_write(data->saved_message.bio, + data->saved_message.data, + data->saved_message.length); + OPENSSL_free(data->saved_message.data); + data->saved_message.data = NULL; + data->saved_message.length = 0; + } + + /* disable sender dry event */ +# ifdef SCTP_EVENT + memset(&event, 0, sizeof(struct sctp_event)); + event.se_assoc_id = 0; + event.se_type = SCTP_SENDER_DRY_EVENT; + event.se_on = 0; + i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, + sizeof(struct sctp_event)); + if (i < 0) { + ret = i; + break; + } +# else + eventsize = sizeof(struct sctp_event_subscribe); + i = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, + &eventsize); + if (i < 0) { + ret = i; + break; + } + + event.sctp_sender_dry_event = 0; + + i = setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, + sizeof(struct sctp_event_subscribe)); + if (i < 0) { + ret = i; + break; + } +# endif + } +# ifdef SCTP_AUTHENTICATION_EVENT + if (snp->sn_header.sn_type == SCTP_AUTHENTICATION_EVENT) + dgram_sctp_handle_auth_free_key_event(b, snp); +# endif + + if (data->handle_notifications != NULL) + data->handle_notifications(b, data->notification_context, + (void *)out); + + memset(out, 0, outl); + } else + ret += n; + } + while ((msg.msg_flags & MSG_NOTIFICATION) && (msg.msg_flags & MSG_EOR) + && (ret < outl)); + + if (ret > 0 && !(msg.msg_flags & MSG_EOR)) { + /* Partial message read, this should never happen! */ + + /* + * The buffer was too small, this means the peer sent a message + * that was larger than allowed. + */ + if (ret == outl) + return -1; + + /* + * Test if socket buffer can handle max record size (2^14 + 2048 + * + 13) + */ + optlen = (socklen_t) sizeof(int); + ret = getsockopt(b->num, SOL_SOCKET, SO_RCVBUF, &optval, &optlen); + if (ret >= 0) + OPENSSL_assert(optval >= 18445); + + /* + * Test if SCTP doesn't partially deliver below max record size + * (2^14 + 2048 + 13) + */ + optlen = (socklen_t) sizeof(int); + ret = + getsockopt(b->num, IPPROTO_SCTP, SCTP_PARTIAL_DELIVERY_POINT, + &optval, &optlen); + if (ret >= 0) + OPENSSL_assert(optval >= 18445); + + /* + * Partially delivered notification??? Probably a bug.... + */ + OPENSSL_assert(!(msg.msg_flags & MSG_NOTIFICATION)); + + /* + * Everything seems ok till now, so it's most likely a message + * dropped by PR-SCTP. + */ + memset(out, 0, outl); + BIO_set_retry_read(b); + return -1; + } + + BIO_clear_retry_flags(b); + if (ret < 0) { + if (BIO_dgram_should_retry(ret)) { + BIO_set_retry_read(b); + data->_errno = get_last_socket_error(); + } + } + + /* Test if peer uses SCTP-AUTH before continuing */ + if (!data->peer_auth_tested) { + int ii, auth_data = 0, auth_forward = 0; + unsigned char *p; + struct sctp_authchunks *authchunks; + + optlen = + (socklen_t) (sizeof(sctp_assoc_t) + 256 * sizeof(uint8_t)); + authchunks = OPENSSL_malloc(optlen); + if (!authchunks) { + BIOerr(BIO_F_DGRAM_SCTP_READ, ERR_R_MALLOC_FAILURE); + return -1; + } + memset(authchunks, 0, sizeof(optlen)); + ii = getsockopt(b->num, IPPROTO_SCTP, SCTP_PEER_AUTH_CHUNKS, + authchunks, &optlen); + + if (ii >= 0) + for (p = (unsigned char *)authchunks->gauth_chunks; + p < (unsigned char *)authchunks + optlen; + p += sizeof(uint8_t)) { + if (*p == OPENSSL_SCTP_DATA_CHUNK_TYPE) + auth_data = 1; + if (*p == OPENSSL_SCTP_FORWARD_CUM_TSN_CHUNK_TYPE) + auth_forward = 1; + } + + OPENSSL_free(authchunks); + + if (!auth_data || !auth_forward) { + BIOerr(BIO_F_DGRAM_SCTP_READ, BIO_R_CONNECT_ERROR); + return -1; + } + + data->peer_auth_tested = 1; + } + } + return (ret); +} + +static int dgram_sctp_write(BIO *b, const char *in, int inl) +{ + int ret; + bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr; + struct bio_dgram_sctp_sndinfo *sinfo = &(data->sndinfo); + struct bio_dgram_sctp_prinfo *pinfo = &(data->prinfo); + struct bio_dgram_sctp_sndinfo handshake_sinfo; + struct iovec iov[1]; + struct msghdr msg; + struct cmsghdr *cmsg; +# if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO) + char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo)) + + CMSG_SPACE(sizeof(struct sctp_prinfo))]; + struct sctp_sndinfo *sndinfo; + struct sctp_prinfo *prinfo; +# else + char cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndrcvinfo))]; + struct sctp_sndrcvinfo *sndrcvinfo; +# endif + + clear_socket_error(); + + /* + * If we're send anything else than application data, disable all user + * parameters and flags. + */ + if (in[0] != 23) { + memset(&handshake_sinfo, 0x00, sizeof(struct bio_dgram_sctp_sndinfo)); +# ifdef SCTP_SACK_IMMEDIATELY + handshake_sinfo.snd_flags = SCTP_SACK_IMMEDIATELY; +# endif + sinfo = &handshake_sinfo; + } + + /* + * If we have to send a shutdown alert message and the socket is not dry + * yet, we have to save it and send it as soon as the socket gets dry. + */ + if (data->save_shutdown && !BIO_dgram_sctp_wait_for_dry(b)) { + char *tmp; + data->saved_message.bio = b; + if (!(tmp = OPENSSL_malloc(inl))) { + BIOerr(BIO_F_DGRAM_SCTP_WRITE, ERR_R_MALLOC_FAILURE); + return -1; + } + if (data->saved_message.data) + OPENSSL_free(data->saved_message.data); + data->saved_message.data = tmp; + memcpy(data->saved_message.data, in, inl); + data->saved_message.length = inl; + return inl; + } + + iov[0].iov_base = (char *)in; + iov[0].iov_len = inl; + msg.msg_name = NULL; + msg.msg_namelen = 0; + msg.msg_iov = iov; + msg.msg_iovlen = 1; + msg.msg_control = (caddr_t) cmsgbuf; + msg.msg_controllen = 0; + msg.msg_flags = 0; +# if defined(SCTP_SNDINFO) && defined(SCTP_PRINFO) + cmsg = (struct cmsghdr *)cmsgbuf; + cmsg->cmsg_level = IPPROTO_SCTP; + cmsg->cmsg_type = SCTP_SNDINFO; + cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndinfo)); + sndinfo = (struct sctp_sndinfo *)CMSG_DATA(cmsg); + memset(sndinfo, 0, sizeof(struct sctp_sndinfo)); + sndinfo->snd_sid = sinfo->snd_sid; + sndinfo->snd_flags = sinfo->snd_flags; + sndinfo->snd_ppid = sinfo->snd_ppid; + sndinfo->snd_context = sinfo->snd_context; + msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndinfo)); + + cmsg = + (struct cmsghdr *)&cmsgbuf[CMSG_SPACE(sizeof(struct sctp_sndinfo))]; + cmsg->cmsg_level = IPPROTO_SCTP; + cmsg->cmsg_type = SCTP_PRINFO; + cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_prinfo)); + prinfo = (struct sctp_prinfo *)CMSG_DATA(cmsg); + memset(prinfo, 0, sizeof(struct sctp_prinfo)); + prinfo->pr_policy = pinfo->pr_policy; + prinfo->pr_value = pinfo->pr_value; + msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_prinfo)); +# else + cmsg = (struct cmsghdr *)cmsgbuf; + cmsg->cmsg_level = IPPROTO_SCTP; + cmsg->cmsg_type = SCTP_SNDRCV; + cmsg->cmsg_len = CMSG_LEN(sizeof(struct sctp_sndrcvinfo)); + sndrcvinfo = (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg); + memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo)); + sndrcvinfo->sinfo_stream = sinfo->snd_sid; + sndrcvinfo->sinfo_flags = sinfo->snd_flags; +# ifdef __FreeBSD__ + sndrcvinfo->sinfo_flags |= pinfo->pr_policy; +# endif + sndrcvinfo->sinfo_ppid = sinfo->snd_ppid; + sndrcvinfo->sinfo_context = sinfo->snd_context; + sndrcvinfo->sinfo_timetolive = pinfo->pr_value; + msg.msg_controllen += CMSG_SPACE(sizeof(struct sctp_sndrcvinfo)); +# endif + + ret = sendmsg(b->num, &msg, 0); + + BIO_clear_retry_flags(b); + if (ret <= 0) { + if (BIO_dgram_should_retry(ret)) { + BIO_set_retry_write(b); + data->_errno = get_last_socket_error(); + } + } + return (ret); +} + +static long dgram_sctp_ctrl(BIO *b, int cmd, long num, void *ptr) +{ + long ret = 1; + bio_dgram_sctp_data *data = NULL; + socklen_t sockopt_len = 0; + struct sctp_authkeyid authkeyid; + struct sctp_authkey *authkey = NULL; + + data = (bio_dgram_sctp_data *) b->ptr; + + switch (cmd) { + case BIO_CTRL_DGRAM_QUERY_MTU: + /* + * Set to maximum (2^14) and ignore user input to enable transport + * protocol fragmentation. Returns always 2^14. + */ + data->mtu = 16384; + ret = data->mtu; + break; + case BIO_CTRL_DGRAM_SET_MTU: + /* + * Set to maximum (2^14) and ignore input to enable transport + * protocol fragmentation. Returns always 2^14. + */ + data->mtu = 16384; + ret = data->mtu; + break; + case BIO_CTRL_DGRAM_SET_CONNECTED: + case BIO_CTRL_DGRAM_CONNECT: + /* Returns always -1. */ + ret = -1; + break; + case BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT: + /* + * SCTP doesn't need the DTLS timer Returns always 1. + */ + break; + case BIO_CTRL_DGRAM_GET_MTU_OVERHEAD: + /* + * We allow transport protocol fragmentation so this is irrelevant + */ + ret = 0; + break; + case BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE: + if (num > 0) + data->in_handshake = 1; + else + data->in_handshake = 0; + + ret = + setsockopt(b->num, IPPROTO_SCTP, SCTP_NODELAY, + &data->in_handshake, sizeof(int)); + break; + case BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY: + /* + * New shared key for SCTP AUTH. Returns 0 on success, -1 otherwise. + */ + + /* Get active key */ + sockopt_len = sizeof(struct sctp_authkeyid); + ret = + getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, + &sockopt_len); + if (ret < 0) + break; + + /* Add new key */ + sockopt_len = sizeof(struct sctp_authkey) + 64 * sizeof(uint8_t); + authkey = OPENSSL_malloc(sockopt_len); + if (authkey == NULL) { + ret = -1; + break; + } + memset(authkey, 0x00, sockopt_len); + authkey->sca_keynumber = authkeyid.scact_keynumber + 1; +# ifndef __FreeBSD__ + /* + * This field is missing in FreeBSD 8.2 and earlier, and FreeBSD 8.3 + * and higher work without it. + */ + authkey->sca_keylength = 64; +# endif + memcpy(&authkey->sca_key[0], ptr, 64 * sizeof(uint8_t)); + + ret = + setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_KEY, authkey, + sockopt_len); + OPENSSL_free(authkey); + authkey = NULL; + if (ret < 0) + break; + + /* Reset active key */ + ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, + &authkeyid, sizeof(struct sctp_authkeyid)); + if (ret < 0) + break; + + break; + case BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY: + /* Returns 0 on success, -1 otherwise. */ + + /* Get active key */ + sockopt_len = sizeof(struct sctp_authkeyid); + ret = + getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, &authkeyid, + &sockopt_len); + if (ret < 0) + break; + + /* Set active key */ + authkeyid.scact_keynumber = authkeyid.scact_keynumber + 1; + ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, + &authkeyid, sizeof(struct sctp_authkeyid)); + if (ret < 0) + break; + + /* + * CCS has been sent, so remember that and fall through to check if + * we need to deactivate an old key + */ + data->ccs_sent = 1; + + case BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD: + /* Returns 0 on success, -1 otherwise. */ + + /* + * Has this command really been called or is this just a + * fall-through? + */ + if (cmd == BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD) + data->ccs_rcvd = 1; + + /* + * CSS has been both, received and sent, so deactivate an old key + */ + if (data->ccs_rcvd == 1 && data->ccs_sent == 1) { + /* Get active key */ + sockopt_len = sizeof(struct sctp_authkeyid); + ret = + getsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_ACTIVE_KEY, + &authkeyid, &sockopt_len); + if (ret < 0) + break; + + /* + * Deactivate key or delete second last key if + * SCTP_AUTHENTICATION_EVENT is not available. + */ + authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1; +# ifdef SCTP_AUTH_DEACTIVATE_KEY + sockopt_len = sizeof(struct sctp_authkeyid); + ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DEACTIVATE_KEY, + &authkeyid, sockopt_len); + if (ret < 0) + break; +# endif +# ifndef SCTP_AUTHENTICATION_EVENT + if (authkeyid.scact_keynumber > 0) { + authkeyid.scact_keynumber = authkeyid.scact_keynumber - 1; + ret = setsockopt(b->num, IPPROTO_SCTP, SCTP_AUTH_DELETE_KEY, + &authkeyid, sizeof(struct sctp_authkeyid)); + if (ret < 0) + break; + } +# endif + + data->ccs_rcvd = 0; + data->ccs_sent = 0; + } + break; + case BIO_CTRL_DGRAM_SCTP_GET_SNDINFO: + /* Returns the size of the copied struct. */ + if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo)) + num = sizeof(struct bio_dgram_sctp_sndinfo); + + memcpy(ptr, &(data->sndinfo), num); + ret = num; + break; + case BIO_CTRL_DGRAM_SCTP_SET_SNDINFO: + /* Returns the size of the copied struct. */ + if (num > (long)sizeof(struct bio_dgram_sctp_sndinfo)) + num = sizeof(struct bio_dgram_sctp_sndinfo); + + memcpy(&(data->sndinfo), ptr, num); + break; + case BIO_CTRL_DGRAM_SCTP_GET_RCVINFO: + /* Returns the size of the copied struct. */ + if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo)) + num = sizeof(struct bio_dgram_sctp_rcvinfo); + + memcpy(ptr, &data->rcvinfo, num); + + ret = num; + break; + case BIO_CTRL_DGRAM_SCTP_SET_RCVINFO: + /* Returns the size of the copied struct. */ + if (num > (long)sizeof(struct bio_dgram_sctp_rcvinfo)) + num = sizeof(struct bio_dgram_sctp_rcvinfo); + + memcpy(&(data->rcvinfo), ptr, num); + break; + case BIO_CTRL_DGRAM_SCTP_GET_PRINFO: + /* Returns the size of the copied struct. */ + if (num > (long)sizeof(struct bio_dgram_sctp_prinfo)) + num = sizeof(struct bio_dgram_sctp_prinfo); + + memcpy(ptr, &(data->prinfo), num); + ret = num; + break; + case BIO_CTRL_DGRAM_SCTP_SET_PRINFO: + /* Returns the size of the copied struct. */ + if (num > (long)sizeof(struct bio_dgram_sctp_prinfo)) + num = sizeof(struct bio_dgram_sctp_prinfo); + + memcpy(&(data->prinfo), ptr, num); + break; + case BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN: + /* Returns always 1. */ + if (num > 0) + data->save_shutdown = 1; + else + data->save_shutdown = 0; + break; + + default: + /* + * Pass to default ctrl function to process SCTP unspecific commands + */ + ret = dgram_ctrl(b, cmd, num, ptr); + break; + } + return (ret); +} + +int BIO_dgram_sctp_notification_cb(BIO *b, + void (*handle_notifications) (BIO *bio, + void + *context, + void *buf), + void *context) +{ + bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr; + + if (handle_notifications != NULL) { + data->handle_notifications = handle_notifications; + data->notification_context = context; + } else + return -1; + + return 0; +} + +int BIO_dgram_sctp_wait_for_dry(BIO *b) +{ + int is_dry = 0; + int n, sockflags, ret; + union sctp_notification snp; + struct msghdr msg; + struct iovec iov; +# ifdef SCTP_EVENT + struct sctp_event event; +# else + struct sctp_event_subscribe event; + socklen_t eventsize; +# endif + bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr; + + /* set sender dry event */ +# ifdef SCTP_EVENT + memset(&event, 0, sizeof(struct sctp_event)); + event.se_assoc_id = 0; + event.se_type = SCTP_SENDER_DRY_EVENT; + event.se_on = 1; + ret = + setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, + sizeof(struct sctp_event)); +# else + eventsize = sizeof(struct sctp_event_subscribe); + ret = getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, &eventsize); + if (ret < 0) + return -1; + + event.sctp_sender_dry_event = 1; + + ret = + setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, + sizeof(struct sctp_event_subscribe)); +# endif + if (ret < 0) + return -1; + + /* peek for notification */ + memset(&snp, 0x00, sizeof(union sctp_notification)); + iov.iov_base = (char *)&snp; + iov.iov_len = sizeof(union sctp_notification); + msg.msg_name = NULL; + msg.msg_namelen = 0; + msg.msg_iov = &iov; + msg.msg_iovlen = 1; + msg.msg_control = NULL; + msg.msg_controllen = 0; + msg.msg_flags = 0; + + n = recvmsg(b->num, &msg, MSG_PEEK); + if (n <= 0) { + if ((n < 0) && (get_last_socket_error() != EAGAIN) + && (get_last_socket_error() != EWOULDBLOCK)) + return -1; + else + return 0; + } + + /* if we find a notification, process it and try again if necessary */ + while (msg.msg_flags & MSG_NOTIFICATION) { + memset(&snp, 0x00, sizeof(union sctp_notification)); + iov.iov_base = (char *)&snp; + iov.iov_len = sizeof(union sctp_notification); + msg.msg_name = NULL; + msg.msg_namelen = 0; + msg.msg_iov = &iov; + msg.msg_iovlen = 1; + msg.msg_control = NULL; + msg.msg_controllen = 0; + msg.msg_flags = 0; + + n = recvmsg(b->num, &msg, 0); + if (n <= 0) { + if ((n < 0) && (get_last_socket_error() != EAGAIN) + && (get_last_socket_error() != EWOULDBLOCK)) + return -1; + else + return is_dry; + } + + if (snp.sn_header.sn_type == SCTP_SENDER_DRY_EVENT) { + is_dry = 1; + + /* disable sender dry event */ +# ifdef SCTP_EVENT + memset(&event, 0, sizeof(struct sctp_event)); + event.se_assoc_id = 0; + event.se_type = SCTP_SENDER_DRY_EVENT; + event.se_on = 0; + ret = + setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENT, &event, + sizeof(struct sctp_event)); +# else + eventsize = (socklen_t) sizeof(struct sctp_event_subscribe); + ret = + getsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, + &eventsize); + if (ret < 0) + return -1; + + event.sctp_sender_dry_event = 0; + + ret = + setsockopt(b->num, IPPROTO_SCTP, SCTP_EVENTS, &event, + sizeof(struct sctp_event_subscribe)); +# endif + if (ret < 0) + return -1; + } +# ifdef SCTP_AUTHENTICATION_EVENT + if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT) + dgram_sctp_handle_auth_free_key_event(b, &snp); +# endif + + if (data->handle_notifications != NULL) + data->handle_notifications(b, data->notification_context, + (void *)&snp); + + /* found notification, peek again */ + memset(&snp, 0x00, sizeof(union sctp_notification)); + iov.iov_base = (char *)&snp; + iov.iov_len = sizeof(union sctp_notification); + msg.msg_name = NULL; + msg.msg_namelen = 0; + msg.msg_iov = &iov; + msg.msg_iovlen = 1; + msg.msg_control = NULL; + msg.msg_controllen = 0; + msg.msg_flags = 0; + + /* if we have seen the dry already, don't wait */ + if (is_dry) { + sockflags = fcntl(b->num, F_GETFL, 0); + fcntl(b->num, F_SETFL, O_NONBLOCK); + } + + n = recvmsg(b->num, &msg, MSG_PEEK); + + if (is_dry) { + fcntl(b->num, F_SETFL, sockflags); + } + + if (n <= 0) { + if ((n < 0) && (get_last_socket_error() != EAGAIN) + && (get_last_socket_error() != EWOULDBLOCK)) + return -1; + else + return is_dry; + } + } + + /* read anything else */ + return is_dry; +} + +int BIO_dgram_sctp_msg_waiting(BIO *b) +{ + int n, sockflags; + union sctp_notification snp; + struct msghdr msg; + struct iovec iov; + bio_dgram_sctp_data *data = (bio_dgram_sctp_data *) b->ptr; + + /* Check if there are any messages waiting to be read */ + do { + memset(&snp, 0x00, sizeof(union sctp_notification)); + iov.iov_base = (char *)&snp; + iov.iov_len = sizeof(union sctp_notification); + msg.msg_name = NULL; + msg.msg_namelen = 0; + msg.msg_iov = &iov; + msg.msg_iovlen = 1; + msg.msg_control = NULL; + msg.msg_controllen = 0; + msg.msg_flags = 0; + + sockflags = fcntl(b->num, F_GETFL, 0); + fcntl(b->num, F_SETFL, O_NONBLOCK); + n = recvmsg(b->num, &msg, MSG_PEEK); + fcntl(b->num, F_SETFL, sockflags); + + /* if notification, process and try again */ + if (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)) { +# ifdef SCTP_AUTHENTICATION_EVENT + if (snp.sn_header.sn_type == SCTP_AUTHENTICATION_EVENT) + dgram_sctp_handle_auth_free_key_event(b, &snp); +# endif + + memset(&snp, 0x00, sizeof(union sctp_notification)); + iov.iov_base = (char *)&snp; + iov.iov_len = sizeof(union sctp_notification); + msg.msg_name = NULL; + msg.msg_namelen = 0; + msg.msg_iov = &iov; + msg.msg_iovlen = 1; + msg.msg_control = NULL; + msg.msg_controllen = 0; + msg.msg_flags = 0; + n = recvmsg(b->num, &msg, 0); + + if (data->handle_notifications != NULL) + data->handle_notifications(b, data->notification_context, + (void *)&snp); + } + + } while (n > 0 && (msg.msg_flags & MSG_NOTIFICATION)); + + /* Return 1 if there is a message to be read, return 0 otherwise. */ + if (n > 0) + return 1; + else + return 0; +} + +static int dgram_sctp_puts(BIO *bp, const char *str) +{ + int n, ret; + + n = strlen(str); + ret = dgram_sctp_write(bp, str, n); + return (ret); +} +# endif + +static int BIO_dgram_should_retry(int i) +{ + int err; + + if ((i == 0) || (i == -1)) { + err = get_last_socket_error(); + +# if defined(OPENSSL_SYS_WINDOWS) + /* + * If the socket return value (i) is -1 and err is unexpectedly 0 at + * this point, the error code was overwritten by another system call + * before this error handling is called. + */ +# endif + + return (BIO_dgram_non_fatal_error(err)); + } + return (0); +} + +int BIO_dgram_non_fatal_error(int err) +{ + switch (err) { +# if defined(OPENSSL_SYS_WINDOWS) +# if defined(WSAEWOULDBLOCK) + case WSAEWOULDBLOCK: +# endif + +# if 0 /* This appears to always be an error */ +# if defined(WSAENOTCONN) + case WSAENOTCONN: +# endif +# endif +# endif + +# ifdef EWOULDBLOCK +# ifdef WSAEWOULDBLOCK +# if WSAEWOULDBLOCK != EWOULDBLOCK + case EWOULDBLOCK: +# endif +# else + case EWOULDBLOCK: +# endif +# endif + +# ifdef EINTR + case EINTR: +# endif + +# ifdef EAGAIN +# if EWOULDBLOCK != EAGAIN + case EAGAIN: +# endif +# endif + +# ifdef EPROTO + case EPROTO: +# endif + +# ifdef EINPROGRESS + case EINPROGRESS: +# endif + +# ifdef EALREADY + case EALREADY: +# endif + + return (1); + /* break; */ + default: + break; + } + return (0); +} + +static void get_current_time(struct timeval *t) +{ +# if defined(_WIN32) + SYSTEMTIME st; + union { + unsigned __int64 ul; + FILETIME ft; + } now; + + GetSystemTime(&st); + SystemTimeToFileTime(&st, &now.ft); +# ifdef __MINGW32__ + now.ul -= 116444736000000000ULL; +# else + now.ul -= 116444736000000000UI64; /* re-bias to 1/1/1970 */ +# endif + t->tv_sec = (long)(now.ul / 10000000); + t->tv_usec = ((int)(now.ul % 10000000)) / 10; +# elif defined(OPENSSL_SYS_VMS) + struct timeb tb; + ftime(&tb); + t->tv_sec = (long)tb.time; + t->tv_usec = (long)tb.millitm * 1000; +# else + gettimeofday(t, NULL); +# endif +} + +#endif |