X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=ssl%2Fd1_lib.c;h=f4bfd29afd5b18892a2852fba362d24d339f2ebc;hp=712b880f919a7df00ac3c11a86c9ae4dedac5da7;hb=62b6948a2710c2a095b87b0b9c4b89f7b23246a9;hpb=8711efb4984b66a901b543d1b5d96fc5b6928d10 diff --git a/ssl/d1_lib.c b/ssl/d1_lib.c index 712b880f91..f4bfd29afd 100644 --- a/ssl/d1_lib.c +++ b/ssl/d1_lib.c @@ -58,10 +58,17 @@ */ #include +#define USE_SOCKETS #include #include "ssl_locl.h" +#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS) +#include +#endif + +static void get_current_time(struct timeval *t); const char dtls1_version_str[]="DTLSv1" OPENSSL_VERSION_PTEXT; +int dtls1_listen(SSL *s, struct sockaddr *client); SSL3_ENC_METHOD DTLSv1_enc_data={ dtls1_enc, @@ -75,6 +82,7 @@ SSL3_ENC_METHOD DTLSv1_enc_data={ TLS_MD_CLIENT_FINISH_CONST,TLS_MD_CLIENT_FINISH_CONST_SIZE, TLS_MD_SERVER_FINISH_CONST,TLS_MD_SERVER_FINISH_CONST_SIZE, tls1_alert_code, + tls1_export_keying_material, }; long dtls1_default_timeout(void) @@ -122,26 +130,33 @@ int dtls1_new(SSL *s) return(1); } -void dtls1_free(SSL *s) +static void dtls1_clear_queues(SSL *s) { pitem *item = NULL; hm_fragment *frag = NULL; - - ssl3_free(s); + DTLS1_RECORD_DATA *rdata; while( (item = pqueue_pop(s->d1->unprocessed_rcds.q)) != NULL) { + rdata = (DTLS1_RECORD_DATA *) item->data; + if (rdata->rbuf.buf) + { + OPENSSL_free(rdata->rbuf.buf); + } OPENSSL_free(item->data); pitem_free(item); } - pqueue_free(s->d1->unprocessed_rcds.q); while( (item = pqueue_pop(s->d1->processed_rcds.q)) != NULL) { + rdata = (DTLS1_RECORD_DATA *) item->data; + if (rdata->rbuf.buf) + { + OPENSSL_free(rdata->rbuf.buf); + } OPENSSL_free(item->data); pitem_free(item); } - pqueue_free(s->d1->processed_rcds.q); while( (item = pqueue_pop(s->d1->buffered_messages)) != NULL) { @@ -150,7 +165,6 @@ void dtls1_free(SSL *s) OPENSSL_free(frag); pitem_free(item); } - pqueue_free(s->d1->buffered_messages); while ( (item = pqueue_pop(s->d1->sent_messages)) != NULL) { @@ -159,7 +173,6 @@ void dtls1_free(SSL *s) OPENSSL_free(frag); pitem_free(item); } - pqueue_free(s->d1->sent_messages); while ( (item = pqueue_pop(s->d1->buffered_app_data.q)) != NULL) { @@ -168,6 +181,18 @@ void dtls1_free(SSL *s) OPENSSL_free(frag); pitem_free(item); } + } + +void dtls1_free(SSL *s) + { + ssl3_free(s); + + dtls1_clear_queues(s); + + pqueue_free(s->d1->unprocessed_rcds.q); + pqueue_free(s->d1->processed_rcds.q); + pqueue_free(s->d1->buffered_messages); + pqueue_free(s->d1->sent_messages); pqueue_free(s->d1->buffered_app_data.q); OPENSSL_free(s->d1); @@ -175,6 +200,43 @@ void dtls1_free(SSL *s) void dtls1_clear(SSL *s) { + pqueue unprocessed_rcds; + pqueue processed_rcds; + pqueue buffered_messages; + pqueue sent_messages; + pqueue buffered_app_data; + unsigned int mtu; + + if (s->d1) + { + unprocessed_rcds = s->d1->unprocessed_rcds.q; + processed_rcds = s->d1->processed_rcds.q; + buffered_messages = s->d1->buffered_messages; + sent_messages = s->d1->sent_messages; + buffered_app_data = s->d1->buffered_app_data.q; + mtu = s->d1->mtu; + + dtls1_clear_queues(s); + + memset(s->d1, 0, sizeof(*(s->d1))); + + if (s->server) + { + s->d1->cookie_len = sizeof(s->d1->cookie); + } + + if (SSL_get_options(s) & SSL_OP_NO_QUERY_MTU) + { + s->d1->mtu = mtu; + } + + s->d1->unprocessed_rcds.q = unprocessed_rcds; + s->d1->processed_rcds.q = processed_rcds; + s->d1->buffered_messages = buffered_messages; + s->d1->sent_messages = sent_messages; + s->d1->buffered_app_data.q = buffered_app_data; + } + ssl3_clear(s); if (s->options & SSL_OP_CISCO_ANYCONNECT) s->version=DTLS1_BAD_VER; @@ -182,6 +244,32 @@ void dtls1_clear(SSL *s) s->version=DTLS1_VERSION; } +long dtls1_ctrl(SSL *s, int cmd, long larg, void *parg) + { + int ret=0; + + switch (cmd) + { + case DTLS_CTRL_GET_TIMEOUT: + if (dtls1_get_timeout(s, (struct timeval*) parg) != NULL) + { + ret = 1; + } + break; + case DTLS_CTRL_HANDLE_TIMEOUT: + ret = dtls1_handle_timeout(s); + break; + case DTLS_CTRL_LISTEN: + ret = dtls1_listen(s, parg); + break; + + default: + ret = ssl3_ctrl(s, cmd, larg, parg); + break; + } + return(ret); + } + /* * As it's impossible to use stream ciphers in "datagram" mode, this * simple filter is designed to disengage them in DTLS. Unfortunately @@ -201,3 +289,185 @@ const SSL_CIPHER *dtls1_get_cipher(unsigned int u) return ciph; } + +void dtls1_start_timer(SSL *s) + { +#ifndef OPENSSL_NO_SCTP + /* Disable timer for SCTP */ + if (BIO_dgram_is_sctp(SSL_get_wbio(s))) + { + memset(&(s->d1->next_timeout), 0, sizeof(struct timeval)); + return; + } +#endif + + /* If timer is not set, initialize duration with 1 second */ + if (s->d1->next_timeout.tv_sec == 0 && s->d1->next_timeout.tv_usec == 0) + { + s->d1->timeout_duration = 1; + } + + /* Set timeout to current time */ + get_current_time(&(s->d1->next_timeout)); + + /* Add duration to current time */ + s->d1->next_timeout.tv_sec += s->d1->timeout_duration; + BIO_ctrl(SSL_get_rbio(s), BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT, 0, &(s->d1->next_timeout)); + } + +struct timeval* dtls1_get_timeout(SSL *s, struct timeval* timeleft) + { + struct timeval timenow; + + /* If no timeout is set, just return NULL */ + if (s->d1->next_timeout.tv_sec == 0 && s->d1->next_timeout.tv_usec == 0) + { + return NULL; + } + + /* Get current time */ + get_current_time(&timenow); + + /* If timer already expired, set remaining time to 0 */ + if (s->d1->next_timeout.tv_sec < timenow.tv_sec || + (s->d1->next_timeout.tv_sec == timenow.tv_sec && + s->d1->next_timeout.tv_usec <= timenow.tv_usec)) + { + memset(timeleft, 0, sizeof(struct timeval)); + return timeleft; + } + + /* Calculate time left until timer expires */ + memcpy(timeleft, &(s->d1->next_timeout), sizeof(struct timeval)); + timeleft->tv_sec -= timenow.tv_sec; + timeleft->tv_usec -= timenow.tv_usec; + if (timeleft->tv_usec < 0) + { + timeleft->tv_sec--; + timeleft->tv_usec += 1000000; + } + + /* If remaining time is less than 15 ms, set it to 0 + * to prevent issues because of small devergences with + * socket timeouts. + */ + if (timeleft->tv_sec == 0 && timeleft->tv_usec < 15000) + { + memset(timeleft, 0, sizeof(struct timeval)); + } + + + return timeleft; + } + +int dtls1_is_timer_expired(SSL *s) + { + struct timeval timeleft; + + /* Get time left until timeout, return false if no timer running */ + if (dtls1_get_timeout(s, &timeleft) == NULL) + { + return 0; + } + + /* Return false if timer is not expired yet */ + if (timeleft.tv_sec > 0 || timeleft.tv_usec > 0) + { + return 0; + } + + /* Timer expired, so return true */ + return 1; + } + +void dtls1_double_timeout(SSL *s) + { + s->d1->timeout_duration *= 2; + if (s->d1->timeout_duration > 60) + s->d1->timeout_duration = 60; + dtls1_start_timer(s); + } + +void dtls1_stop_timer(SSL *s) + { + /* Reset everything */ + memset(&(s->d1->next_timeout), 0, sizeof(struct timeval)); + s->d1->timeout_duration = 1; + BIO_ctrl(SSL_get_rbio(s), BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT, 0, &(s->d1->next_timeout)); + /* Clear retransmission buffer */ + dtls1_clear_record_buffer(s); + } + +int dtls1_handle_timeout(SSL *s) + { + DTLS1_STATE *state; + + /* if no timer is expired, don't do anything */ + if (!dtls1_is_timer_expired(s)) + { + return 0; + } + + dtls1_double_timeout(s); + state = s->d1; + state->timeout.num_alerts++; + if ( state->timeout.num_alerts > DTLS1_TMO_ALERT_COUNT) + { + /* fail the connection, enough alerts have been sent */ + SSLerr(SSL_F_DTLS1_HANDLE_TIMEOUT,SSL_R_READ_TIMEOUT_EXPIRED); + return -1; + } + + state->timeout.read_timeouts++; + if ( state->timeout.read_timeouts > DTLS1_TMO_READ_COUNT) + { + state->timeout.read_timeouts = 1; + } + + if (state->timeout_duration > 2) + { + s->d1->mtu = BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_GET_FALLBACK_MTU, 0, NULL); + } + +#ifndef OPENSSL_NO_HEARTBEATS + if (s->tlsext_hb_pending) + { + s->tlsext_hb_pending = 0; + return dtls1_heartbeat(s); + } +#endif + + dtls1_start_timer(s); + return dtls1_retransmit_buffered_messages(s); + } + +static void get_current_time(struct timeval *t) +{ +#ifdef OPENSSL_SYS_WIN32 + struct _timeb tb; + _ftime(&tb); + t->tv_sec = (long)tb.time; + t->tv_usec = (long)tb.millitm * 1000; +#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 +} + +int dtls1_listen(SSL *s, struct sockaddr *client) + { + int ret; + + SSL_set_options(s, SSL_OP_COOKIE_EXCHANGE); + s->d1->listen = 1; + + ret = SSL_accept(s); + if (ret <= 0) return ret; + + (void) BIO_dgram_get_peer(SSL_get_rbio(s), client); + return 1; + }