/*

 * Copyright 2005-2025 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the Apache License 2.0 (the "License").  You may not use

 * this file except in compliance with the License.  You can obtain a copy

 * in the file LICENSE in the source distribution or at

 * https://www.openssl.org/source/license.html

 */

#include "ssl_local.h"

#include "internal/ssl_unwrap.h"

int dtls1_write_app_data_bytes(SSL *s, uint8_t type, const void *buf_,

    size_t len, size_t *written)

{

    int i;

    SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL_ONLY(s);

    if (sc == NULL)

        return -1;

    /*

     * If we are supposed to be sending a KeyUpdate or NewSessionTicket then go

     * into init - in which case we should finish doing that first.

     */

    if (sc->key_update != SSL_KEY_UPDATE_NONE || sc->ext.extra_tickets_expected > 0)

        ossl_statem_set_in_init(sc, 1);

    if (SSL_in_init(s) && !ossl_statem_get_in_handshake(sc)) {

        i = sc->handshake_func(s);

        if (i < 0)

            return i;

        if (i == 0) {

            ERR_raise(ERR_LIB_SSL, SSL_R_SSL_HANDSHAKE_FAILURE);

            return -1;

        }

    }

    if (len > SSL3_RT_MAX_PLAIN_LENGTH) {

        ERR_raise(ERR_LIB_SSL, SSL_R_DTLS_MESSAGE_TOO_BIG);

        return -1;

    }

    return dtls1_write_bytes(sc, type, buf_, len, written);

}

int dtls1_dispatch_alert(SSL *ssl)

{

    int i, j;

    void (*cb)(const SSL *ssl, int type, int val) = NULL;

    unsigned char buf[DTLS1_AL_HEADER_LENGTH];

    unsigned char *ptr = &buf[0];

    size_t written;

    SSL_CONNECTION *s = SSL_CONNECTION_FROM_SSL_ONLY(ssl);

    if (s == NULL)

        return 0;

    s->s3.alert_dispatch = SSL_ALERT_DISPATCH_NONE;

    memset(buf, 0, sizeof(buf));

    *ptr++ = s->s3.send_alert[0];

    *ptr++ = s->s3.send_alert[1];

    i = do_dtls1_write(s, SSL3_RT_ALERT, &buf[0], sizeof(buf), &written);

    if (i <= 0) {

        s->s3.alert_dispatch = 1;

        /* fprintf(stderr, "not done with alert\n"); */

    } else {

        (void)BIO_flush(s->wbio);

        if (s->msg_callback)

            s->msg_callback(1, s->version, SSL3_RT_ALERT, s->s3.send_alert,

                2, ssl, s->msg_callback_arg);

        if (s->info_callback != NULL)

            cb = s->info_callback;

        else if (ssl->ctx->info_callback != NULL)

            cb = ssl->ctx->info_callback;

        if (cb != NULL) {

            j = (s->s3.send_alert[0] << 8) | s->s3.send_alert[1];

            cb(ssl, SSL_CB_WRITE_ALERT, j);

        }

    }

    return i;

}