int WPACKET_memcpy(WPACKET *pkt, const void *src, size_t len)
{
    unsigned char *dest;
    if (len == 0)
        return 1;
    if (!WPACKET_allocate_bytes(pkt, len, &dest))
        return 0;
    memcpy(dest, src, len);
    return 1;
}
['int tls_construct_server_hello(SSL *s)\n{\n    int sl, compm, al = SSL_AD_INTERNAL_ERROR;\n    size_t len;\n    WPACKET pkt;\n    if (!WPACKET_init(&pkt, s->init_buf)\n            || !ssl_set_handshake_header2(s, &pkt, SSL3_MT_SERVER_HELLO)\n            || !WPACKET_put_bytes_u16(&pkt, s->version)\n            || !WPACKET_memcpy(&pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) {\n        SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_HELLO, ERR_R_INTERNAL_ERROR);\n        goto err;\n    }\n    if (s->session->not_resumable ||\n        (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER)\n         && !s->hit))\n        s->session->session_id_length = 0;\n    sl = s->session->session_id_length;\n    if (sl > (int)sizeof(s->session->session_id)) {\n        SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_HELLO, ERR_R_INTERNAL_ERROR);\n        goto err;\n    }\n#ifdef OPENSSL_NO_COMP\n    compm = 0;\n#else\n    if (s->s3->tmp.new_compression == NULL)\n        compm = 0;\n    else\n        compm = s->s3->tmp.new_compression->id;\n#endif\n    if (!WPACKET_sub_memcpy_u8(&pkt, s->session->session_id, sl)\n            || !s->method->put_cipher_by_char(s->s3->tmp.new_cipher, &pkt, &len)\n            || !WPACKET_put_bytes_u8(&pkt, compm)\n            || !ssl_prepare_serverhello_tlsext(s)\n            || !ssl_add_serverhello_tlsext(s, &pkt, &al)\n            || !ssl_close_construct_packet(s, &pkt)) {\n        SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_HELLO, ERR_R_INTERNAL_ERROR);\n        goto err;\n    }\n    return 1;\n err:\n    WPACKET_cleanup(&pkt);\n    ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);\n    ossl_statem_set_error(s);\n    return 0;\n}', 'int WPACKET_init(WPACKET *pkt, BUF_MEM *buf)\n{\n    return WPACKET_init_len(pkt, buf, 0);\n}', 'int WPACKET_init_len(WPACKET *pkt, BUF_MEM *buf, size_t lenbytes)\n{\n    unsigned char *lenchars;\n    assert(buf != NULL);\n    if (buf == NULL)\n        return 0;\n    pkt->buf = buf;\n    pkt->curr = 0;\n    pkt->written = 0;\n    pkt->maxsize = maxmaxsize(lenbytes);\n    pkt->subs = OPENSSL_zalloc(sizeof(*pkt->subs));\n    if (pkt->subs == NULL)\n        return 0;\n    if (lenbytes == 0)\n        return 1;\n    pkt->subs->pwritten = lenbytes;\n    pkt->subs->lenbytes = lenbytes;\n    if (!WPACKET_allocate_bytes(pkt, lenbytes, &lenchars)) {\n        OPENSSL_free(pkt->subs);\n        pkt->subs = NULL;\n        return 0;\n    }\n    pkt->subs->packet_len = lenchars - (unsigned char *)pkt->buf->data;\n    return 1;\n}', 'int WPACKET_put_bytes__(WPACKET *pkt, unsigned int val, size_t size)\n{\n    unsigned char *data;\n    assert(size <= sizeof(unsigned int));\n    if (size > sizeof(unsigned int)\n            || !WPACKET_allocate_bytes(pkt, size, &data)\n            || !put_value(data, val, size))\n        return 0;\n    return 1;\n}', 'int WPACKET_memcpy(WPACKET *pkt, const void *src, size_t len)\n{\n    unsigned char *dest;\n    if (len == 0)\n        return 1;\n    if (!WPACKET_allocate_bytes(pkt, len, &dest))\n        return 0;\n    memcpy(dest, src, len);\n    return 1;\n}', 'int WPACKET_allocate_bytes(WPACKET *pkt, size_t len, unsigned char **allocbytes)\n{\n    if (!WPACKET_reserve_bytes(pkt, len, allocbytes))\n        return 0;\n    pkt->written += len;\n    pkt->curr += len;\n    return 1;\n}', 'int WPACKET_reserve_bytes(WPACKET *pkt, size_t len, unsigned char **allocbytes)\n{\n    assert(pkt->subs != NULL && len != 0);\n    if (pkt->subs == NULL || len == 0)\n        return 0;\n    if (pkt->maxsize - pkt->written < len)\n        return 0;\n    if (pkt->buf->length - pkt->written < len) {\n        size_t newlen;\n        size_t reflen;\n        reflen = (len > pkt->buf->length) ? len : pkt->buf->length;\n        if (reflen > SIZE_MAX / 2) {\n            newlen = SIZE_MAX;\n        } else {\n            newlen = reflen * 2;\n            if (newlen < DEFAULT_BUF_SIZE)\n                newlen = DEFAULT_BUF_SIZE;\n        }\n        if (BUF_MEM_grow(pkt->buf, newlen) == 0)\n            return 0;\n    }\n    *allocbytes = (unsigned char *)pkt->buf->data + pkt->curr;\n    return 1;\n}']