socket_tcp - setting up TCP sockets

NAME SYNTAX DESCRIPTION REMOTE CODES EXAMPLE SEE ALSO

NAME

socket_tcp − setting up TCP sockets

SYNTAX

#include "socket_if.h"

int socket_tcp4();
int socket_tcp6();
int socket_tcp();

DESCRIPTION

socket_tcp4 creates a non-blocking TCP/IPv4 stream socket and providing a file descriptor pointing to that socket.

socket_tcp6 creates a non-blocking TCP/IPv6 stream socket and providing a file descriptor pointing to that socket.

socket_tcp creates a non-blocking IPv6 TCP/IP socket calling socket_tcp6 unless it can’t bind to IPv6 and now facilitating socket_tcp4.

REMOTE CODES

All these routines return 0 except in case of failures, returning -1 and setting errno appropriately, without allocating any resources.

EXAMPLE

#include <socket_if.h>

int t;
char localip[16];
char remoteip[16];
uint16 p;

if (ip6_isv4mapped(remoteip)) {
t = socket_tcp4();
socket_bind4(t,localip + 12,0);
} else {
t = socket_tcp6();
socket_bind6(t,localip,0,0);
}
socket_connect(s,remoteip,p,0);