SystemBase Eddy DK, Руководство программиста

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Eddy DK Programmer Guide
109
SB_BindUdp
Function Binds UDP socket.
Format Int SB_BindUdp (int Socket_No);
Parameter Socket_No UDP socket number to bind
Returns Handle Handle number bound to UDP socket
-1: Bind failure
N: Handle number bound to UDP socket
Notice
SB_ReadUdp
Function Reads data transmitted to UDP socket bound in network.
Format Int SB_ReadUdp (int Handle, char *Buffer, int Buffer_Size);
Parameter Handle
Buffer
Buffer_Size Handle number bound to UDP socket
Buffer point where packet data to be read will be
saved
Size of the buffer to save
Returns -1 ~ N Size of the data read.
-1: Socket error
0: No data was read
N: Length of the data read
Notice When client sends data to bound UDP socket, this function remembers
client’s IP address and socket number for SB_SendUdpServer to use.
SB_SendUdpServer
Function Transmits data to UDP socket. (Server mode)
Format Int SB_SendUdpServer (int Handle, char *Buffer, int Data_Size);
Parameter Handle
Buffer
Data_Size Handle number bound to UDP socket
Buffer point where packet data to be sent is saved
Size of the buffer to send
Returns None
Notice This function can be called after confirming client’s network
information by sending data to UDP socket bound to Eddy from
network; that is, user has to call SB_ReadUdp first.
When data transmission has to be made first, user has to use
SB_SendUdpClient function.