s_cb.c

mediastreamer2是开源的网络传输媒体流的库

	if (w & SSL_ST_CONNECT) str="SSL_connect";
	else if (w & SSL_ST_ACCEPT) str="SSL_accept";
	else str="undefined";

	if (where & SSL_CB_LOOP)
		{
		BIO_printf(bio_err,"%s:%s\n",str,SSL_state_string_long(s));
		}
	else if (where & SSL_CB_ALERT)
		{
		str=(where & SSL_CB_READ)?"read":"write";
		BIO_printf(bio_err,"SSL3 alert %s:%s:%s\n",
			str,
			SSL_alert_type_string_long(ret),
			SSL_alert_desc_string_long(ret));
		}
	else if (where & SSL_CB_EXIT)
		{
		if (ret == 0)
			BIO_printf(bio_err,"%s:failed in %s\n",
				str,SSL_state_string_long(s));
		else if (ret < 0)
			{
			BIO_printf(bio_err,"%s:error in %s\n",
				str,SSL_state_string_long(s));
			}
		}
	}


void MS_CALLBACK msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg)
	{
	BIO *bio = arg;
	const char *str_write_p, *str_version, *str_content_type = "", *str_details1 = "", *str_details2= "";
	
	str_write_p = write_p ? ">>>" : "<<<";

	switch (version)
		{
	case SSL2_VERSION:
		str_version = "SSL 2.0";
		break;
	case SSL3_VERSION:
		str_version = "SSL 3.0 ";
		break;
	case TLS1_VERSION:
		str_version = "TLS 1.0 ";
		break;
	default:
		str_version = "???";
		}

	if (version == SSL2_VERSION)
		{
		str_details1 = "???";

		if (len > 0)
			{
			switch (((const unsigned char*)buf)[0])
				{
				case 0:
					str_details1 = ", ERROR:";
					str_details2 = " ???";
					if (len >= 3)
						{
						unsigned err = (((const unsigned char*)buf)[1]<<8) + ((const unsigned char*)buf)[2];
						
						switch (err)
							{
						case 0x0001:
							str_details2 = " NO-CIPHER-ERROR";
							break;
						case 0x0002:
							str_details2 = " NO-CERTIFICATE-ERROR";
							break;
						case 0x0004:
							str_details2 = " BAD-CERTIFICATE-ERROR";
							break;
						case 0x0006:
							str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
							break;
							}
						}

					break;
				case 1:
					str_details1 = ", CLIENT-HELLO";
					break;
				case 2:
					str_details1 = ", CLIENT-MASTER-KEY";
					break;
				case 3:
					str_details1 = ", CLIENT-FINISHED";
					break;
				case 4:
					str_details1 = ", SERVER-HELLO";
					break;
				case 5:
					str_details1 = ", SERVER-VERIFY";
					break;
				case 6:
					str_details1 = ", SERVER-FINISHED";
					break;
				case 7:
					str_details1 = ", REQUEST-CERTIFICATE";
					break;
				case 8:
					str_details1 = ", CLIENT-CERTIFICATE";
					break;
				}
			}
		}

	if (version == SSL3_VERSION || version == TLS1_VERSION)
		{
		switch (content_type)
			{
		case 20:
			str_content_type = "ChangeCipherSpec";
			break;
		case 21:
			str_content_type = "Alert";
			break;
		case 22:
			str_content_type = "Handshake";
			break;
			}

		if (content_type == 21) /* Alert */
			{
			str_details1 = ", ???";
			
			if (len == 2)
				{
				switch (((const unsigned char*)buf)[0])
					{
				case 1:
					str_details1 = ", warning";
					break;
				case 2:
					str_details1 = ", fatal";
					break;
					}

				str_details2 = " ???";
				switch (((const unsigned char*)buf)[1])
					{
				case 0:
					str_details2 = " close_notify";
					break;
				case 10:
					str_details2 = " unexpected_message";
					break;
				case 20:
					str_details2 = " bad_record_mac";
					break;
				case 21:
					str_details2 = " decryption_failed";
					break;
				case 22:
					str_details2 = " record_overflow";
					break;
				case 30:
					str_details2 = " decompression_failure";
					break;
				case 40:
					str_details2 = " handshake_failure";
					break;
				case 42:
					str_details2 = " bad_certificate";
					break;
				case 43:
					str_details2 = " unsupported_certificate";
					break;
				case 44:
					str_details2 = " certificate_revoked";
					break;
				case 45:
					str_details2 = " certificate_expired";
					break;
				case 46:
					str_details2 = " certificate_unknown";
					break;
				case 47:
					str_details2 = " illegal_parameter";
					break;
				case 48:
					str_details2 = " unknown_ca";
					break;
				case 49:
					str_details2 = " access_denied";
					break;
				case 50:
					str_details2 = " decode_error";
					break;
				case 51:
					str_details2 = " decrypt_error";
					break;
				case 60:
					str_details2 = " export_restriction";
					break;
				case 70:
					str_details2 = " protocol_version";
					break;
				case 71:
					str_details2 = " insufficient_security";
					break;
				case 80:
					str_details2 = " internal_error";
					break;
				case 90:
					str_details2 = " user_canceled";
					break;
				case 100:
					str_details2 = " no_renegotiation";
					break;
					}
				}
			}
		
		if (content_type == 22) /* Handshake */
			{
			str_details1 = "???";

			if (len > 0)
				{
				switch (((const unsigned char*)buf)[0])
					{
				case 0:
					str_details1 = ", HelloRequest";
					break;
				case 1:
					str_details1 = ", ClientHello";
					break;
				case 2:
					str_details1 = ", ServerHello";
					break;
				case 11:
					str_details1 = ", Certificate";
					break;
				case 12:
					str_details1 = ", ServerKeyExchange";
					break;
				case 13:
					str_details1 = ", CertificateRequest";
					break;
				case 14:
					str_details1 = ", ServerHelloDone";
					break;
				case 15:
					str_details1 = ", CertificateVerify";
					break;
				case 16:
					str_details1 = ", ClientKeyExchange";
					break;
				case 20:
					str_details1 = ", Finished";
					break;
					}
				}
			}
		}

	BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p, str_version, str_content_type, (unsigned long)len, str_details1, str_details2);

	if (len > 0)
		{
		size_t num, i;
		
		BIO_printf(bio, "   ");
		num = len;
#if 0
		if (num > 16)
			num = 16;
#endif
		for (i = 0; i < num; i++)
			{
			if (i % 16 == 0 && i > 0)
				BIO_printf(bio, "\n   ");
			BIO_printf(bio, " %02x", ((const unsigned char*)buf)[i]);
			}
		if (i < len)
			BIO_printf(bio, " ...");
		BIO_printf(bio, "\n");
		}
	BIO_flush(bio);
	}