minix/lib/ip/accept.c

80 lines
1.6 KiB
C

#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <net/netlib.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_accept(int socket, struct sockaddr *_RESTRICT address,
socklen_t *_RESTRICT address_len);
int accept(int socket, struct sockaddr *_RESTRICT address,
socklen_t *_RESTRICT address_len)
{
int r;
nwio_udpopt_t udpopt;
r= _tcp_accept(socket, address, address_len);
if (r != -1 || (errno != ENOTTY && errno != EBADIOCTL))
return r;
/* Unfortunately, we have to return EOPNOTSUPP for a socket that
* does not support accept (such as a UDP socket) and ENOTSOCK for
* filedescriptors that do not refer to a socket.
*/
r= ioctl(socket, NWIOGUDPOPT, &udpopt);
if (r == 0)
{
/* UDP socket */
errno= EOPNOTSUPP;
return -1;
}
if ((errno == ENOTTY || errno == EBADIOCTL))
{
errno= ENOTSOCK;
return -1;
}
return r;
}
static int _tcp_accept(int socket, struct sockaddr *_RESTRICT address,
socklen_t *_RESTRICT address_len)
{
int r, s1, t_errno;
tcp_cookie_t cookie;
s1= open(TCP_DEVICE, O_RDWR);
if (s1 == -1)
return s1;
r= ioctl(s1, NWIOGTCPCOOKIE, &cookie);
if (r == -1)
{
t_errno= errno;
close(s1);
errno= t_errno;
return -1;
}
r= ioctl(socket, NWIOTCPACCEPTTO, &cookie);
if (r == -1)
{
t_errno= errno;
close(s1);
errno= t_errno;
return -1;
}
if (address != NULL)
getpeername(s1, address, address_len);
return s1;
}