minix/lib/ip/getpeername.c
2005-08-25 10:47:24 +00:00

70 lines
1.4 KiB
C

#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <net/gen/in.h>
#include <net/gen/tcp.h>
#include <net/gen/tcp_io.h>
#include <net/gen/udp.h>
#include <net/gen/udp_io.h>
#define DEBUG 0
static int _tcp_getpeername(int socket, struct sockaddr *_RESTRICT address,
socklen_t *_RESTRICT address_len, nwio_tcpconf_t *tcpconfp);
int getpeername(int socket, struct sockaddr *_RESTRICT address,
socklen_t *_RESTRICT address_len)
{
int r;
nwio_tcpconf_t tcpconf;
r= ioctl(socket, NWIOGTCPCONF, &tcpconf);
if (r != -1 || errno != ENOTTY)
{
if (r == -1)
{
/* Bad file descriptor */
return -1;
}
return _tcp_getpeername(socket, address, address_len,
&tcpconf);
}
#if DEBUG
fprintf(stderr, "getpeername: not implemented for fd %d\n", socket);
#endif
errno= ENOSYS;
return -1;
}
static int _tcp_getpeername(int socket, struct sockaddr *_RESTRICT address,
socklen_t *_RESTRICT address_len, nwio_tcpconf_t *tcpconfp)
{
socklen_t len;
struct sockaddr_in sin;
if (tcpconfp->nwtc_remaddr == 0 ||
tcpconfp->nwtc_remport == 0)
{
errno= ENOTCONN;
return -1;
}
memset(&sin, '\0', sizeof(sin));
sin.sin_family= AF_INET;
sin.sin_addr.s_addr= tcpconfp->nwtc_remaddr;
sin.sin_port= tcpconfp->nwtc_remport;
len= *address_len;
if (len > sizeof(sin))
len= sizeof(sin);
memcpy(address, &sin, len);
*address_len= len;
return 0;
}