libdill: Structured Concurrency for C

NAME

tcp_accept_mem - accepts an incoming TCP connection

SYNOPSIS

#include <libdill.h>

int tcp_accept_mem(int s, struct ipaddr *addr, void *mem, int64_t deadline);

DESCRIPTION

TCP protocol is a bytestream protocol (i.e. data can be sent via bsend() and received via brecv()) for transporting data among machines.

This function accepts an incoming TCP connection from the listening socket s, in user-supplied memory. The memory is passed in mem argument. It must be at least TCP_SIZE bytes long and can be deallocated only after the socket is closed. Unless you are hyper-optimizing use tcp_accept() instead.

If addr paramerer is not NULL the IP address of the connecting peer will be stored inside it.

deadline is a point in time when the operation should time out. Use the now() function to get your current point in time. 0 means immediate timeout, i.e., perform the operation if possible or return without blocking if not. -1 means no deadline, i.e., the call will block forever if the operation cannot be performed.

The socket can be cleanly shut down using tcp_close() function.

RETURN VALUE

Newly created socket handle. On error, it returns -1 and sets errno to one of the values below.

ERRORS

EXAMPLE

int listener = tcp_listen(&addr, 10);
char mem[TCP_SIZE];
int s = tcp_accept_mem(listener, mem, -1);