/* HEL -> Open up the connection */
static void processHEL(UA_Connection *connection, const UA_ByteString *msg, size_t *offset) {
UA_TcpHelloMessage helloMessage;
if(UA_TcpHelloMessage_decodeBinary(msg, offset, &helloMessage) != UA_STATUSCODE_GOOD) {
connection->close(connection);
return;
}
/* Parameterize the connection */
connection->remoteConf.maxChunkCount = helloMessage.maxChunkCount; /* zero -> unlimited */
connection->remoteConf.maxMessageSize = helloMessage.maxMessageSize; /* zero -> unlimited */
connection->remoteConf.protocolVersion = helloMessage.protocolVersion;
connection->remoteConf.recvBufferSize = helloMessage.receiveBufferSize;
if(connection->localConf.sendBufferSize > helloMessage.receiveBufferSize)
connection->localConf.sendBufferSize = helloMessage.receiveBufferSize;
connection->remoteConf.sendBufferSize = helloMessage.sendBufferSize;
if(connection->localConf.recvBufferSize > helloMessage.sendBufferSize)
connection->localConf.recvBufferSize = helloMessage.sendBufferSize;
connection->state = UA_CONNECTION_ESTABLISHED;
UA_TcpHelloMessage_deleteMembers(&helloMessage);
/* Build acknowledge response */
UA_TcpAcknowledgeMessage ackMessage;
ackMessage.protocolVersion = connection->localConf.protocolVersion;
ackMessage.receiveBufferSize = connection->localConf.recvBufferSize;
ackMessage.sendBufferSize = connection->localConf.sendBufferSize;
ackMessage.maxMessageSize = connection->localConf.maxMessageSize;
ackMessage.maxChunkCount = connection->localConf.maxChunkCount;
UA_TcpMessageHeader ackHeader;
ackHeader.messageTypeAndChunkType = UA_MESSAGETYPE_ACK + UA_CHUNKTYPE_FINAL;
ackHeader.messageSize = 8 + 20; /* ackHeader + ackMessage */
/* Get the send buffer from the network layer */
UA_ByteString ack_msg;
UA_ByteString_init(&ack_msg);
UA_StatusCode retval =
connection->getSendBuffer(connection, connection->localConf.sendBufferSize, &ack_msg);
if(retval != UA_STATUSCODE_GOOD)
return;
/* Encode and send the response */
size_t tmpPos = 0;
UA_TcpMessageHeader_encodeBinary(&ackHeader, &ack_msg, &tmpPos);
UA_TcpAcknowledgeMessage_encodeBinary(&ackMessage, &ack_msg, &tmpPos);
ack_msg.length = ackHeader.messageSize;
connection->send(connection, &ack_msg);
}
static void processHEL(UA_Connection *connection, const UA_ByteString *msg, size_t *pos) {
UA_TcpHelloMessage helloMessage;
if(UA_TcpHelloMessage_decodeBinary(msg, pos, &helloMessage) != UA_STATUSCODE_GOOD) {
connection->close(connection);
return;
}
connection->remoteConf.maxChunkCount = helloMessage.maxChunkCount;
connection->remoteConf.maxMessageSize = helloMessage.maxMessageSize;
connection->remoteConf.protocolVersion = helloMessage.protocolVersion;
connection->remoteConf.recvBufferSize = helloMessage.receiveBufferSize;
if(connection->localConf.sendBufferSize > helloMessage.receiveBufferSize)
connection->localConf.sendBufferSize = helloMessage.receiveBufferSize;
if(connection->localConf.recvBufferSize > helloMessage.sendBufferSize)
connection->localConf.recvBufferSize = helloMessage.sendBufferSize;
connection->remoteConf.sendBufferSize = helloMessage.sendBufferSize;
connection->state = UA_CONNECTION_ESTABLISHED;
UA_TcpHelloMessage_deleteMembers(&helloMessage);
// build acknowledge response
UA_TcpAcknowledgeMessage ackMessage;
ackMessage.protocolVersion = connection->localConf.protocolVersion;
ackMessage.receiveBufferSize = connection->localConf.recvBufferSize;
ackMessage.sendBufferSize = connection->localConf.sendBufferSize;
ackMessage.maxMessageSize = connection->localConf.maxMessageSize;
ackMessage.maxChunkCount = connection->localConf.maxChunkCount;
UA_TcpMessageHeader ackHeader;
ackHeader.messageTypeAndFinal = UA_MESSAGETYPEANDFINAL_ACKF;
ackHeader.messageSize = UA_TcpMessageHeader_calcSizeBinary(&ackHeader)
+ UA_TcpAcknowledgeMessage_calcSizeBinary(&ackMessage);
UA_ByteString ack_msg;
if(connection->getBuffer(connection, &ack_msg, ackHeader.messageSize) != UA_STATUSCODE_GOOD)
return;
size_t tmpPos = 0;
UA_TcpMessageHeader_encodeBinary(&ackHeader, &ack_msg, &tmpPos);
UA_TcpAcknowledgeMessage_encodeBinary(&ackMessage, &ack_msg, &tmpPos);
connection->write(connection, &ack_msg);
connection->releaseBuffer(connection, &ack_msg);
}
