minix/lib/ip/setsockopt.c

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2005-07-27 13:57:59 +02:00
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <net/gen/in.h>
#include <net/gen/tcp.h>
#include <net/gen/tcp_io.h>
#define DEBUG 0
static int _tcp_setsockopt(int socket, int level, int option_name,
const void *option_value, socklen_t option_len);
int setsockopt(int socket, int level, int option_name,
const void *option_value, socklen_t option_len)
{
int r;
nwio_tcpopt_t tcpopt;
r= ioctl(socket, NWIOGTCPOPT, &tcpopt);
if (r != -1 || errno != ENOTTY)
{
if (r == -1)
{
/* Bad file descriptor */
return -1;
}
return _tcp_setsockopt(socket, level, option_name,
option_value, option_len);
}
#if DEBUG
fprintf(stderr, "setsockopt: not implemented for fd %d\n", socket);
#endif
errno= ENOSYS;
return -1;
}
static int _tcp_setsockopt(int socket, int level, int option_name,
const void *option_value, socklen_t option_len)
{
int i;
if (level == SOL_SOCKET && option_name == SO_KEEPALIVE)
{
if (option_len != sizeof(i))
{
errno= EINVAL;
return -1;
}
i= *(int *)option_value;
if (!i)
{
/* At the moment there is no way to turn off
* keepalives.
*/
errno= ENOSYS;
return -1;
}
return 0;
}
fprintf(stderr, "_tcp_setsocketopt: level %d, name %d\n",
level, option_name);
assert(0);
}