minix/lib/libc/ip/shutdown.c

54 lines
897 B
C

#include <errno.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <net/gen/in.h>
#include <net/gen/tcp.h>
#include <net/gen/tcp_io.h>
#define DEBUG 1
static int _tcp_shutdown(int socket, int how);
int shutdown(int socket, int how)
{
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_shutdown(socket, how);
}
#if DEBUG
fprintf(stderr, "shutdown: not implemented for fd %d\n", socket);
#endif
errno= ENOSYS;
return -1;
}
static int _tcp_shutdown(int socket, int how)
{
int r;
if (how == SHUT_WR || how == SHUT_RDWR)
{
r= ioctl(socket, NWIOTCPSHUTDOWN, NULL);
if (r == -1)
return -1;
if (how == SHUT_WR)
return 0;
}
/* We can't shutdown the read side of the socket. */
errno= ENOSYS;
return -1;
}