socket_conn.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34

#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#include "socket.h"
#include "uint16.h"


int socket_connect4(int s,const char ip[4],u16 port)
{
	struct sockaddr_in sa;

	memset(&sa,0,sizeof sa);
	sa.sin_family = AF_INET;
	u16_pack_big((char *) &sa.sin_port,port);
	memcpy((char *) &sa.sin_addr,ip,4);

	return connect(s,(struct sockaddr *) &sa,sizeof sa);
}

int socket_connected(int s)
{
	struct sockaddr_in sa;
	socklen_t dummy;
	char ch;

	dummy = sizeof sa;
	if (getpeername(s,(struct sockaddr *) &sa,&dummy) == -1) {
		read(s,&ch,1); /* sets errno */
		return 0;
	}
	return 1;
}