minix/lib/libc/sys/listen.c

   1 #include <sys/cdefs.h>
   2 #include "namespace.h"
   3 #include <lib.h>
   4
   5 #include <errno.h>
   6 #include <stdio.h>
   7 #include <string.h>
   8 #include <sys/ioctl.h>
   9 #include <sys/socket.h>
  10 #include <netinet/in.h>
  11
  12 #include <net/gen/in.h>
  13 #include <net/gen/tcp.h>
  14 #include <net/gen/tcp_io.h>
  15 #include <net/gen/udp.h>
  16 #include <net/gen/udp_io.h>
  17
  18 /*
  19  * Put a socket in listening mode.
  20  */
  21 static int
  22 __listen(int fd, int backlog)
  23 {
  24         message m;
  25
  26         memset(&m, 0, sizeof(m));
  27         m.m_lc_vfs_listen.fd = fd;
  28         m.m_lc_vfs_listen.backlog = backlog;
  29
  30         return _syscall(VFS_PROC_NR, VFS_LISTEN, &m);
  31 }
  32
  33 int listen(int sock, int backlog)
  34 {
  35         int r;
  36
  37         r = __listen(sock, backlog);
  38         if (r != -1 || (errno != ENOTSOCK && errno != ENOSYS))
  39                 return r;
  40
  41         r= ioctl(sock, NWIOTCPLISTENQ, &backlog);
  42         if (r != -1 || errno != ENOTTY)
  43                 return r;
  44
  45         r= ioctl(sock, NWIOSUDSBLOG, &backlog);
  46         if (r != -1 || errno != ENOTTY)
  47                 return r;
  48
  49         errno = ENOTSOCK;
  50         return -1;
  51 }