accept.c

来自「minix操作系统最新版本（3.1.1）的源代码」· C语言 代码 · 共 66 行

#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;

	r= _tcp_accept(socket, address, address_len);
	return r;

#if DEBUG
	fprintf(stderr, "accept: not implemented for fd %d\n", socket);
#endif
	errno= ENOSYS;
	return -1;
}

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;
}