static UA_Int64 sendReadRequest(ConnectionInfo *connectionInfo, UA_Int32 nodeIds_size,UA_NodeId* nodeIds){
/*UA_Int32 sock, UA_UInt32 channelId, UA_UInt32 tokenId, UA_UInt32 sequenceNumber, UA_UInt32 requestId,
UA_NodeId authenticationToken, UA_Int32 nodeIds_size,UA_NodeId* nodeIds) {
*/
UA_ByteString *message = UA_ByteString_new();
UA_ByteString_newMembers(message, 65536);
UA_UInt32 tmpChannelId = connectionInfo->channelId;
size_t offset = 0;
UA_TcpMessageHeader msghdr;
msghdr.messageTypeAndFinal = UA_MESSAGETYPEANDFINAL_MSGF;
UA_NodeId type;
type.identifier.numeric = 631;
type.identifierType = UA_NODEIDTYPE_NUMERIC;
type.namespaceIndex = 0;
UA_ReadRequest rq;
UA_ReadRequest_init(&rq);
rq.maxAge = 0;
rq.nodesToRead = UA_Array_new(&UA_TYPES[UA_TYPES_READVALUEID], nodeIds_size);
rq.nodesToReadSize = 1;
for(UA_Int32 i=0;i<nodeIds_size;i++) {
UA_ReadValueId_init(&(rq.nodesToRead[i]));
rq.nodesToRead[i].attributeId = 6; //WriteMask
UA_NodeId_init(&(rq.nodesToRead[i].nodeId));
rq.nodesToRead[i].nodeId = nodeIds[i];
UA_QualifiedName_init(&(rq.nodesToRead[0].dataEncoding));
}
rq.requestHeader.timeoutHint = 10000;
rq.requestHeader.timestamp = UA_DateTime_now();
rq.requestHeader.authenticationToken = connectionInfo->authenticationToken;
rq.timestampsToReturn = 0x03;
rq.requestHeader.requestHandle = 1 + connectionInfo->sequenceHdr.requestId;
msghdr.messageSize = 16 + UA_TcpMessageHeader_calcSizeBinary(&msghdr) + UA_NodeId_calcSizeBinary(&type) +
UA_ReadRequest_calcSizeBinary(&rq);
UA_TcpMessageHeader_encodeBinary(&msghdr,message,&offset);
UA_UInt32_encodeBinary(&tmpChannelId, message, &offset);
UA_UInt32_encodeBinary(&connectionInfo->tokenId, message, &offset);
UA_UInt32_encodeBinary(&connectionInfo->sequenceHdr.sequenceNumber, message, &offset);
UA_UInt32_encodeBinary(&connectionInfo->sequenceHdr.requestId, message, &offset);
UA_NodeId_encodeBinary(&type,message,&offset);
UA_ReadRequest_encodeBinary(&rq, message, &offset);
UA_DateTime tic = UA_DateTime_now();
UA_Int32 sendret = send(connectionInfo->socket, message->data, offset, 0);
UA_Array_delete(rq.nodesToRead, &UA_TYPES[UA_TYPES_READVALUEID], nodeIds_size);
UA_ByteString_delete(message);
if (sendret < 0) {
printf("send readrequest failed");
return 1;
}
return tic;
}
int main(int argc , char *argv[]) {
int sock;
struct sockaddr_in server;
UA_ByteString message;
message.data = (UA_Byte*)malloc(1000*sizeof(UA_Byte));
message.length = 1000;
//UA_UInt32 messageEncodedLength = 0;
UA_Byte server_reply[2000];
unsigned int messagepos = 0;
//Create socket
#ifdef UA_ENABLE_NONSTANDARD_UDP
sock = socket(AF_INET , SOCK_DGRAM , 0);
#else
sock = socket(AF_INET , SOCK_STREAM , 0);
#endif
if(sock == -1) {
printf("Could not create socket");
}
server.sin_addr.s_addr = inet_addr("127.0.0.1");
server.sin_family = AF_INET;
server.sin_port = htons( 16664 );
//Connect to remote server
if(connect(sock, (struct sockaddr *)&server, sizeof(server)) < 0) {
perror("connect failed. Error");
return 1;
}
UA_TcpMessageHeader reqTcpHeader;
UA_UInt32 reqSecureChannelId = 0;
UA_UInt32 reqTokenId = 0;
UA_SequenceHeader reqSequenceHeader;
UA_NodeId reqRequestType;
UA_ReadRequest req;
UA_RequestHeader reqHeader;
UA_NodeId reqHeaderAuthToken;
UA_ExtensionObject reqHeaderAdditionalHeader;
UA_NodeId_init(&reqRequestType);
reqRequestType.identifierType = UA_NODEIDTYPE_NUMERIC;
reqRequestType.identifier.numeric = 631; //read request
UA_SequenceHeader_init(&reqSequenceHeader);
reqSequenceHeader.sequenceNumber = 42;
UA_ReadRequest_init(&req);
req.requestHeader = reqHeader;
UA_RequestHeader_init(&(req.requestHeader));
req.requestHeader.authenticationToken = reqHeaderAuthToken;
UA_NodeId_init(&(req.requestHeader.authenticationToken));
req.requestHeader.additionalHeader = reqHeaderAdditionalHeader;
UA_ExtensionObject_init(&(req.requestHeader.additionalHeader));
req.nodesToRead= UA_Array_new(&UA_TYPES[UA_TYPES_READVALUEID], 1);
req.nodesToReadSize = 1;
UA_ReadValueId_init(&(req.nodesToRead[0]));
req.nodesToRead[0].attributeId = 13; //UA_ATTRIBUTEID_VALUE
UA_NodeId_init(&(req.nodesToRead[0].nodeId));
req.nodesToRead[0].nodeId.identifierType = UA_NODEIDTYPE_NUMERIC;
req.nodesToRead[0].nodeId.identifier.numeric = 2255;
UA_QualifiedName_init(&(req.nodesToRead[0].dataEncoding));
/**messageEncodedLength = UA_TcpMessageHeader_calcSizeBinary(&reqTcpHeader) +
UA_UInt32_calcSizeBinary(&reqSecureChannelId)+
UA_UInt32_calcSizeBinary(&reqTokenId)+
UA_SequenceHeader_calcSizeBinary(&reqSequenceHeader)+
UA_NodeId_calcSizeBinary(&reqRequestType) +
UA_ReadRequest_calcSizeBinary(&req);**/
UA_TcpMessageHeader_init(&reqTcpHeader);
reqTcpHeader.messageTypeAndFinal = UA_MESSAGETYPEANDFINAL_MSGF;
UA_TcpMessageHeader_encodeBinary(&reqTcpHeader, &message, &messagepos);
UA_UInt32_encodeBinary(&reqSecureChannelId, &message, &messagepos);
UA_UInt32_encodeBinary(&reqTokenId, &message, &messagepos);
UA_SequenceHeader_encodeBinary(&reqSequenceHeader, &message, &messagepos);
UA_NodeId_encodeBinary(&reqRequestType, &message, &messagepos);
UA_ReadRequest_encodeBinary(&req, &message, &messagepos);
reqTcpHeader.messageSize = messagepos;
messagepos=0;
UA_TcpMessageHeader_encodeBinary(&reqTcpHeader, &message, &messagepos);
UA_UInt32_encodeBinary(&reqSecureChannelId, &message, &messagepos);
UA_UInt32_encodeBinary(&reqTokenId, &message, &messagepos);
UA_SequenceHeader_encodeBinary(&reqSequenceHeader, &message, &messagepos);
UA_NodeId_encodeBinary(&reqRequestType, &message, &messagepos);
UA_ReadRequest_encodeBinary(&req, &message, &messagepos);
//Send some data
if(send(sock , message.data, messagepos , 0) < 0) {
puts("Send failed");
return 1;
}
//Receive a reply from the server
int received = recv(sock , server_reply , 2000 , 0);
if(received < 0) {
puts("recv failed");
return 1;
}
for(int i=0;i<received;i++) {
//show only printable ascii
if(server_reply[i] >= 32 && server_reply[i]<= 126)
printf("%c",server_reply[i]);
}
printf("\n");
close(sock);
return 0;
}