182 lines
3.4 KiB
C
182 lines
3.4 KiB
C
#include <assert.h>
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#include <errno.h>
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#include <stdio.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <netinet/tcp.h>
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#include <net/gen/in.h>
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#include <net/gen/tcp.h>
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#include <net/gen/tcp_io.h>
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#include <net/gen/udp.h>
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#include <net/gen/udp_io.h>
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#define DEBUG 0
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static int _tcp_setsockopt(int socket, int level, int option_name,
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const void *option_value, socklen_t option_len);
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static int _udp_setsockopt(int socket, int level, int option_name,
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const void *option_value, socklen_t option_len);
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int setsockopt(int socket, int level, int option_name,
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const void *option_value, socklen_t option_len)
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{
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int r;
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nwio_tcpopt_t tcpopt;
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nwio_udpopt_t udpopt;
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r= ioctl(socket, NWIOGTCPOPT, &tcpopt);
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if (r != -1 || errno != ENOTTY)
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{
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if (r == -1)
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{
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/* Bad file descriptor */
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return -1;
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}
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return _tcp_setsockopt(socket, level, option_name,
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option_value, option_len);
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}
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r= ioctl(socket, NWIOGUDPOPT, &udpopt);
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if (r != -1 || errno != ENOTTY)
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{
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if (r == -1)
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{
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/* Bad file descriptor */
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return -1;
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}
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return _udp_setsockopt(socket, level, option_name,
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option_value, option_len);
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}
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#if DEBUG
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fprintf(stderr, "setsockopt: not implemented for fd %d\n", socket);
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#endif
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errno= ENOTSOCK;
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return -1;
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}
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static int _tcp_setsockopt(int socket, int level, int option_name,
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const void *option_value, socklen_t option_len)
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{
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int i;
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if (level == SOL_SOCKET && option_name == SO_REUSEADDR)
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{
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if (option_len != sizeof(i))
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{
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errno= EINVAL;
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return -1;
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}
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i= *(int *)option_value;
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if (!i)
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{
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/* At the moment there is no way to turn off
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* reusing addresses.
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*/
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errno= ENOSYS;
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return -1;
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}
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return 0;
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}
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if (level == SOL_SOCKET && option_name == SO_KEEPALIVE)
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{
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if (option_len != sizeof(i))
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{
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errno= EINVAL;
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return -1;
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}
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i= *(int *)option_value;
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if (!i)
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{
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/* At the moment there is no way to turn off
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* keepalives.
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*/
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errno= ENOSYS;
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return -1;
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}
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return 0;
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}
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if (level == SOL_SOCKET && option_name == SO_RCVBUF)
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{
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if (option_len != sizeof(i))
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{
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errno= EINVAL;
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return -1;
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}
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i= *(int *)option_value;
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if (i > 32*1024)
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{
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/* The receive buffer is limited to 32K at the moment.
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*/
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errno= ENOSYS;
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return -1;
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}
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/* There is no way to reduce the receive buffer, do we have to
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* let this call fail for smaller buffers?
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*/
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return 0;
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}
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if (level == SOL_SOCKET && option_name == SO_SNDBUF)
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{
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if (option_len != sizeof(i))
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{
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errno= EINVAL;
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return -1;
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}
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i= *(int *)option_value;
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if (i > 32*1024)
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{
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/* The send buffer is limited to 32K at the moment.
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*/
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errno= ENOSYS;
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return -1;
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}
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/* There is no way to reduce the send buffer, do we have to
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* let this call fail for smaller buffers?
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*/
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return 0;
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}
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if (level == IPPROTO_TCP && option_name == TCP_NODELAY)
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{
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if (option_len != sizeof(i))
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{
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errno= EINVAL;
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return -1;
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}
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i= *(int *)option_value;
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if (i)
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{
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/* At the moment there is no way to turn on
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* nodelay.
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*/
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errno= ENOSYS;
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return -1;
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}
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return 0;
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}
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#if DEBUG
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fprintf(stderr, "_tcp_setsocketopt: level %d, name %d\n",
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level, option_name);
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#endif
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errno= ENOSYS;
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return -1;
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}
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static int _udp_setsockopt(int socket, int level, int option_name,
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const void *option_value, socklen_t option_len)
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{
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int i;
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#if DEBUG
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fprintf(stderr, "_udp_setsocketopt: level %d, name %d\n",
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level, option_name);
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#endif
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errno= ENOSYS;
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return -1;
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}
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