Solvline PB2xxxUG - Manual (Page 83)

U_listen
TCP Listen
Description This function enables connections to a socket. It also specified only one
unaccepted connection that can be pending at one time.
Synopsis int U_listen (int socket_no)
Parameters socket_no : Socket descriptor
Returns -1 : If the socket is invalid or unable to listen
1~n : A descriptor that references the socket if successful
U_accept
Wait TCP Accept
Description This function accepts a connection on a socket, and returns a new socket
created for the connection. It blocks, up to the specified sec and usec, until a
new socket generates.
Synopsis int U_accept (int fd, int sec, int usec)
Parameters fd : Socket descriptor
sec : A maximum interval to wait for the connection in second
usec : A maximum interval to wait for the connection in micro
second
Returns -1 : If the call fails
0 : Waiting but timeout
n : A socket descriptor if successful
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