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#include <sys/cdefs.h>
#include "namespace.h"
#include <lib.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/un.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>
static int _tcp_accept(int sock, struct sockaddr *__restrict address,
socklen_t *__restrict address_len);
static int _uds_accept(int sock, struct sockaddr *__restrict address,
socklen_t *__restrict address_len);
/*
* Accept a connection on a listening socket, creating a new socket.
*/
static int
__accept(int fd, struct sockaddr * __restrict address,
socklen_t * __restrict address_len)
{
message m;
int r;
if (address != NULL && address_len == NULL) {
errno = EFAULT;
return -1;
}
memset(&m, 0, sizeof(m));
m.m_lc_vfs_sockaddr.fd = fd;
m.m_lc_vfs_sockaddr.addr = (vir_bytes)address;
m.m_lc_vfs_sockaddr.addr_len = (address != NULL) ? *address_len : 0;
if ((r = _syscall(VFS_PROC_NR, VFS_ACCEPT, &m)) < 0)
return -1;
if (address != NULL)
*address_len = m.m_vfs_lc_socklen.len;
return r;
}
int accept(int sock, struct sockaddr *__restrict address,
socklen_t *__restrict address_len)
{
int r;
nwio_udpopt_t udpopt;
r = __accept(sock, address, address_len);
if (r != -1 || (errno != ENOTSOCK && errno != ENOSYS))
return r;
r= _tcp_accept(sock, address, address_len);
if (r != -1 || errno != ENOTTY)
return r;
r= _uds_accept(sock, address, address_len);
if (r != -1 || errno != ENOTTY)
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(sock, NWIOGUDPOPT, &udpopt);
if (r == 0 || (r == -1 && errno != ENOTTY)) {
/* UDP socket */
errno= EOPNOTSUPP;
return -1;
}
errno = ENOTSOCK;
return -1;
}
static int _tcp_accept(int sock, 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(sock, 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;
}
static int _uds_accept(int sock, struct sockaddr *__restrict address,
socklen_t *__restrict address_len)
{
int s1;
int r;
struct sockaddr_un uds_addr;
socklen_t len;
memset(&uds_addr, '\0', sizeof(struct sockaddr_un));
r= ioctl(sock, NWIOGUDSADDR, &uds_addr);
if (r == -1) {
return r;
}
if (uds_addr.sun_family != AF_UNIX) {
errno= EINVAL;
return -1;
}
len= *address_len;
if (len > sizeof(struct sockaddr_un))
len = sizeof(struct sockaddr_un);
memcpy(address, &uds_addr, len);
*address_len= len;
s1= open(UDS_DEVICE, O_RDWR);
if (s1 == -1)
return s1;
/* Copy file descriptor flags from the listening socket. */
fcntl(s1, F_SETFL, fcntl(sock, F_GETFL));
r= ioctl(s1, NWIOSUDSACCEPT, address);
if (r == -1) {
int ioctl_errno = errno;
close(s1);
errno = ioctl_errno;
return r;
}
return s1;
}
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