minix/lib/libc/sys-minix/setsockopt.c

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#include <sys/cdefs.h>
#include "namespace.h"
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/tcp.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_setsockopt(int sock, int level, int option_name,
const void *option_value, socklen_t option_len);
static int _udp_setsockopt(int sock, int level, int option_name,
const void *option_value, socklen_t option_len);
static int _uds_setsockopt(int sock, int level, int option_name,
const void *option_value, socklen_t option_len);
int setsockopt(int sock, int level, int option_name,
const void *option_value, socklen_t option_len)
{
int r;
nwio_tcpopt_t tcpopt;
nwio_udpopt_t udpopt;
struct sockaddr_un uds_addr;
r= ioctl(sock, NWIOGTCPOPT, &tcpopt);
if (r != -1 || errno != ENOTTY)
{
if (r == -1)
{
/* Bad file descriptor */
return -1;
}
return _tcp_setsockopt(sock, level, option_name,
option_value, option_len);
}
r= ioctl(sock, NWIOGUDPOPT, &udpopt);
if (r != -1 || errno != ENOTTY)
{
if (r == -1)
{
/* Bad file descriptor */
return -1;
}
return _udp_setsockopt(sock, level, option_name,
option_value, option_len);
}
r= ioctl(sock, NWIOGUDSADDR, &uds_addr);
if (r != -1 || errno != ENOTTY)
{
if (r == -1)
{
/* Bad file descriptor */
return -1;
}
return _uds_setsockopt(sock, level, option_name,
option_value, option_len);
}
#if DEBUG
fprintf(stderr, "setsockopt: not implemented for fd %d\n", sock);
#endif
errno= ENOTSOCK;
return -1;
}
static int _tcp_setsockopt(int sock, int level, int option_name,
const void *option_value, socklen_t option_len)
{
int i;
if (level == SOL_SOCKET && option_name == SO_REUSEADDR)
{
if (option_len != sizeof(i))
{
errno= EINVAL;
return -1;
}
i= *(const int *)option_value;
if (!i)
{
/* At the moment there is no way to turn off
* reusing addresses.
*/
errno= ENOSYS;
return -1;
}
return 0;
}
if (level == SOL_SOCKET && option_name == SO_KEEPALIVE)
{
if (option_len != sizeof(i))
{
errno= EINVAL;
return -1;
}
i= *(const int *)option_value;
if (!i)
{
/* At the moment there is no way to turn off
* keepalives.
*/
errno= ENOSYS;
return -1;
}
return 0;
}
if (level == SOL_SOCKET && option_name == SO_RCVBUF)
{
if (option_len != sizeof(i))
{
errno= EINVAL;
return -1;
}
i= *(const int *)option_value;
if (i > 32*1024)
{
/* The receive buffer is limited to 32K at the moment.
*/
errno= ENOSYS;
return -1;
}
/* There is no way to reduce the receive buffer, do we have to
* let this call fail for smaller buffers?
*/
return 0;
}
if (level == SOL_SOCKET && option_name == SO_SNDBUF)
{
if (option_len != sizeof(i))
{
errno= EINVAL;
return -1;
}
i= *(const int *)option_value;
if (i > 32*1024)
{
/* The send buffer is limited to 32K at the moment.
*/
errno= ENOSYS;
return -1;
}
/* There is no way to reduce the send buffer, do we have to
* let this call fail for smaller buffers?
*/
return 0;
}
if (level == IPPROTO_TCP && option_name == TCP_NODELAY)
{
if (option_len != sizeof(i))
{
errno= EINVAL;
return -1;
}
i= *(const int *)option_value;
if (i)
{
/* At the moment there is no way to turn on
* nodelay.
*/
errno= ENOSYS;
return -1;
}
return 0;
}
#if DEBUG
fprintf(stderr, "_tcp_setsocketopt: level %d, name %d\n",
level, option_name);
#endif
errno= ENOSYS;
return -1;
}
static int _udp_setsockopt(int sock, int level, int option_name,
const void *option_value, socklen_t option_len)
{
#if DEBUG
fprintf(stderr, "_udp_setsocketopt: level %d, name %d\n",
level, option_name);
#endif
errno= ENOSYS;
return -1;
}
static int _uds_setsockopt(int sock, int level, int option_name,
const void *option_value, socklen_t option_len)
{
int i;
size_t size;
if (level == SOL_SOCKET && option_name == SO_RCVBUF)
{
if (option_len != sizeof(size))
{
errno= EINVAL;
return -1;
}
size= *(const size_t *)option_value;
return ioctl(sock, NWIOSUDSRCVBUF, &size);
}
if (level == SOL_SOCKET && option_name == SO_SNDBUF)
{
if (option_len != sizeof(size))
{
errno= EINVAL;
return -1;
}
size= *(const size_t *)option_value;
return ioctl(sock, NWIOSUDSSNDBUF, &size);
}
if (level == SOL_SOCKET && option_name == SO_REUSEADDR)
{
if (option_len != sizeof(i))
{
errno= EINVAL;
return -1;
}
i= *(const int *)option_value;
if (!i)
{
/* At the moment there is no way to turn off
* reusing addresses.
*/
errno= ENOSYS;
return -1;
}
return 0;
}
if (level == SOL_SOCKET && option_name == SO_PASSCRED)
{
if (option_len != sizeof(i))
{
errno= EINVAL;
return -1;
}
i= *(const int *)option_value;
if (!i)
{
/* credentials can always be received. */
errno= ENOSYS;
return -1;
}
return 0;
}
#if DEBUG
fprintf(stderr, "_uds_setsocketopt: level %d, name %d\n",
level, option_name);
#endif
errno= ENOSYS;
return -1;
}