d1_msg.c revision 1.1.1.1 
1/*
2 * Copyright 2005-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (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#define USE_SOCKETS
11#include "ssl_locl.h"
12
13int dtls1_write_app_data_bytes(SSL *s, int type, const void *buf_, int len)
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    i = dtls1_write_bytes(s, type, buf_, len);
34    return i;
35}
36
37int dtls1_dispatch_alert(SSL *s)
38{
39    int i, j;
40    void (*cb) (const SSL *ssl, int type, int val) = NULL;
41    unsigned char buf[DTLS1_AL_HEADER_LENGTH];
42    unsigned char *ptr = &buf[0];
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#ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
51    if (s->s3->send_alert[1] == DTLS1_AD_MISSING_HANDSHAKE_MESSAGE) {
52        s2n(s->d1->handshake_read_seq, ptr);
53        l2n3(s->d1->r_msg_hdr.frag_off, ptr);
54    }
55#endif
56
57    i = do_dtls1_write(s, SSL3_RT_ALERT, &buf[0], sizeof(buf), 0);
58    if (i <= 0) {
59        s->s3->alert_dispatch = 1;
60        /* fprintf( stderr, "not done with alert\n" ); */
61    } else {
62        if (s->s3->send_alert[0] == SSL3_AL_FATAL
63#ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
64            || s->s3->send_alert[1] == DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
65#endif
66            )
67            (void)BIO_flush(s->wbio);
68
69        if (s->msg_callback)
70            s->msg_callback(1, s->version, SSL3_RT_ALERT, s->s3->send_alert,
71                            2, s, s->msg_callback_arg);
72
73        if (s->info_callback != NULL)
74            cb = s->info_callback;
75        else if (s->ctx->info_callback != NULL)
76            cb = s->ctx->info_callback;
77
78        if (cb != NULL) {
79            j = (s->s3->send_alert[0] << 8) | s->s3->send_alert[1];
80            cb(s, SSL_CB_WRITE_ALERT, j);
81        }
82    }
83    return (i);
84}
85