67 lines
1.4 KiB
C
67 lines
1.4 KiB
C
#include <assert.h>
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#include <errno.h>
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#include <stdio.h>
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#include <string.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 <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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#define DEBUG 0
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static int _tcp_getsockopt(int socket, int level, int option_name,
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void *_RESTRICT option_value, socklen_t *_RESTRICT option_len);
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int getsockopt(int socket, int level, int option_name,
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void *_RESTRICT option_value, socklen_t *_RESTRICT option_len)
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{
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int r;
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nwio_tcpopt_t tcpopt;
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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_getsockopt(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, "getsockopt: not implemented for fd %d\n", socket);
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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 _tcp_getsockopt(int socket, int level, int option_name,
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void *_RESTRICT option_value, socklen_t *_RESTRICT option_len)
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{
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int i;
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if (level == SOL_SOCKET && option_name == SO_KEEPALIVE)
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{
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i= 1; /* Keepalive is always on */
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if (*option_len < sizeof(i))
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memcpy(option_value, &i, *option_len);
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else
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memcpy(option_value, &i, sizeof(i));
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*option_len= sizeof(i);
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return 0;
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}
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#if DEBUG
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fprintf(stderr, "_tcp_getsocketopt: 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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