ssl/d1_msg.c

   1 /*
   2  * Copyright 2005-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   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
   8  */
   9
  10 #include "ssl_locl.h"
  11
  12 int dtls1_write_app_data_bytes(SSL *s, int type, const void *buf_, size_t len,
  13                                size_t *written)
  14 {
  15     int i;
  16
  17     if (SSL_in_init(s) && !ossl_statem_get_in_handshake(s)) {
  18         i = s->handshake_func(s);
  19         if (i < 0)
  20             return i;
  21         if (i == 0) {
  22             SSLerr(SSL_F_DTLS1_WRITE_APP_DATA_BYTES,
  23                    SSL_R_SSL_HANDSHAKE_FAILURE);
  24             return -1;
  25         }
  26     }
  27
  28     if (len > SSL3_RT_MAX_PLAIN_LENGTH) {
  29         SSLerr(SSL_F_DTLS1_WRITE_APP_DATA_BYTES, SSL_R_DTLS_MESSAGE_TOO_BIG);
  30         return -1;
  31     }
  32
  33     return dtls1_write_bytes(s, type, buf_, len, written);
  34 }
  35
  36 int dtls1_dispatch_alert(SSL *s)
  37 {
  38     int i, j;
  39     void (*cb) (const SSL *ssl, int type, int val) = NULL;
  40     unsigned char buf[DTLS1_AL_HEADER_LENGTH];
  41     unsigned char *ptr = &buf[0];
  42     size_t written;
  43
  44     s->s3->alert_dispatch = 0;
  45
  46     memset(buf, 0, sizeof(buf));
  47     *ptr++ = s->s3->send_alert[0];
  48     *ptr++ = s->s3->send_alert[1];
  49
  50     i = do_dtls1_write(s, SSL3_RT_ALERT, &buf[0], sizeof(buf), 0, &written);
  51     if (i <= 0) {
  52         s->s3->alert_dispatch = 1;
  53         /* fprintf( stderr, "not done with alert\n" ); */
  54     } else {
  55         if (s->s3->send_alert[0] == SSL3_AL_FATAL)
  56             (void)BIO_flush(s->wbio);
  57
  58         if (s->msg_callback)
  59             s->msg_callback(1, s->version, SSL3_RT_ALERT, s->s3->send_alert,
  60                             2, s, s->msg_callback_arg);
  61
  62         if (s->info_callback != NULL)
  63             cb = s->info_callback;
  64         else if (s->ctx->info_callback != NULL)
  65             cb = s->ctx->info_callback;
  66
  67         if (cb != NULL) {
  68             j = (s->s3->send_alert[0] << 8) | s->s3->send_alert[1];
  69             cb(s, SSL_CB_WRITE_ALERT, j);
  70         }
  71     }
  72     return i;
  73 }