409 lines
9.6 KiB
C++
409 lines
9.6 KiB
C++
/* fhandler_socket.cc. See fhandler.h for a description of the fhandler classes.
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Copyright 2000, 2001 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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/* #define DEBUG_NEST_ON 1 */
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#define __INSIDE_CYGWIN_NET__
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#include "winsup.h"
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#include <errno.h>
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#include <sys/socket.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#define USE_SYS_TYPES_FD_SET
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#include <winsock2.h>
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#include "cygerrno.h"
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#include "fhandler.h"
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#include "dtable.h"
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#include "cygheap.h"
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#include "sigproc.h"
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#define SECRET_EVENT_NAME "cygwin.local_socket.secret.%d.%08x-%08x-%08x-%08x"
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/**********************************************************************/
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/* fhandler_socket */
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fhandler_socket::fhandler_socket (const char *name) :
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fhandler_base (FH_SOCKET, name)
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{
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set_cb (sizeof *this);
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set_need_fork_fixup ();
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prot_info_ptr = (LPWSAPROTOCOL_INFOA) cmalloc (HEAP_BUF,
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sizeof (WSAPROTOCOL_INFOA));
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}
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fhandler_socket::~fhandler_socket ()
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{
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if (prot_info_ptr)
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cfree (prot_info_ptr);
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}
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void
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fhandler_socket::set_connect_secret ()
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{
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for (int i = 0; i < 4; i++)
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connect_secret [i] = random ();
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}
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void
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fhandler_socket::get_connect_secret (char* buf)
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{
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__small_sprintf (buf, "%08x-%08x-%08x-%08x",
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connect_secret [0], connect_secret [1],
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connect_secret [2], connect_secret [3]);
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}
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HANDLE
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fhandler_socket::create_secret_event (int* secret)
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{
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char buf [128];
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int* secret_ptr = (secret ? : connect_secret);
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struct sockaddr_in sin;
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int sin_len = sizeof (sin);
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if (getsockname (get_socket (), (struct sockaddr*) &sin, &sin_len))
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{
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debug_printf ("error getting local socket name (%d)", WSAGetLastError ());
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return NULL;
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}
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__small_sprintf (buf, SECRET_EVENT_NAME, sin.sin_port,
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secret_ptr [0], secret_ptr [1],
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secret_ptr [2], secret_ptr [3]);
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secret_event = CreateEvent ( NULL, FALSE, FALSE, buf);
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if (!secret_event && GetLastError () == ERROR_ALREADY_EXISTS)
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secret_event = OpenEvent (EVENT_ALL_ACCESS, FALSE, buf);
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if (secret_event)
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{
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ProtectHandle (secret_event);
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SetEvent (secret_event);
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}
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return secret_event;
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}
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void
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fhandler_socket::close_secret_event ()
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{
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if (secret_event)
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ForceCloseHandle (secret_event);
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secret_event = NULL;
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}
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int
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fhandler_socket::check_peer_secret_event (struct sockaddr_in* peer, int* secret)
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{
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char buf [128];
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HANDLE ev;
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int* secret_ptr = (secret ? : connect_secret);
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__small_sprintf (buf, SECRET_EVENT_NAME, peer->sin_port,
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secret_ptr [0], secret_ptr [1],
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secret_ptr [2], secret_ptr [3]);
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ev = CreateEvent (NULL, FALSE, FALSE, buf);
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if (!ev && GetLastError () == ERROR_ALREADY_EXISTS)
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{
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debug_printf ("%s event already exist");
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ev = OpenEvent (EVENT_ALL_ACCESS, FALSE, buf);
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}
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if (ev)
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{
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DWORD rc = WaitForSingleObject (ev, 10000);
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debug_printf ("WFSO rc=%d", rc);
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CloseHandle (ev);
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return (rc == WAIT_OBJECT_0 ? 1 : 0 );
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}
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else
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return 0;
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}
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void
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fhandler_socket::fixup_before_fork_exec (DWORD win_proc_id)
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{
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int ret = 1;
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if (prot_info_ptr &&
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(ret = WSADuplicateSocketA (get_socket (), win_proc_id, prot_info_ptr)))
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{
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debug_printf ("WSADuplicateSocket error");
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set_winsock_errno ();
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}
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if (!ret && ws2_32_handle)
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{
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debug_printf ("WSADuplicateSocket went fine, dwServiceFlags1=%d",
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prot_info_ptr->dwServiceFlags1);
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}
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else
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{
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fhandler_base::fixup_before_fork_exec (win_proc_id);
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debug_printf ("Without Winsock 2.0");
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}
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}
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void
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fhandler_socket::fixup_after_fork (HANDLE parent)
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{
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SOCKET new_sock = INVALID_SOCKET;
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debug_printf ("WSASocket begin, dwServiceFlags1=%d",
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prot_info_ptr->dwServiceFlags1);
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if (prot_info_ptr &&
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(new_sock = WSASocketA (FROM_PROTOCOL_INFO,
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FROM_PROTOCOL_INFO,
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FROM_PROTOCOL_INFO,
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prot_info_ptr, 0, 0)) == INVALID_SOCKET)
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{
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debug_printf ("WSASocket error");
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set_winsock_errno ();
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}
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if (new_sock != INVALID_SOCKET && ws2_32_handle)
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{
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debug_printf ("WSASocket went fine");
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set_io_handle ((HANDLE) new_sock);
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}
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else
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{
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fhandler_base::fixup_after_fork (parent);
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debug_printf ("Without Winsock 2.0");
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}
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if (secret_event)
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fork_fixup (parent, secret_event, "secret_event");
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}
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int
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fhandler_socket::dup (fhandler_base *child)
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{
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fhandler_socket *fhs = (fhandler_socket *) child;
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fhs->addr_family = addr_family;
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fhs->set_io_handle (get_io_handle ());
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fhs->fixup_before_fork_exec (GetCurrentProcessId ());
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if (ws2_32_handle)
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{
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fhs->fixup_after_fork (hMainProc);
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return 0;
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}
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return fhandler_base::dup (child);
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}
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int
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fhandler_socket::read (void *ptr, size_t len)
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{
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sigframe thisframe (mainthread);
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int res = recv (get_socket (), (char *) ptr, len, 0);
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if (res == SOCKET_ERROR)
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{
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set_winsock_errno ();
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}
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return res;
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}
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int
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fhandler_socket::write (const void *ptr, size_t len)
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{
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sigframe thisframe (mainthread);
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int res = send (get_socket (), (const char *) ptr, len, 0);
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if (res == SOCKET_ERROR)
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{
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set_winsock_errno ();
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if (get_errno () == ECONNABORTED || get_errno () == ECONNRESET)
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_raise (SIGPIPE);
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}
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return res;
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}
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/* Cygwin internal */
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int
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fhandler_socket::close ()
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{
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int res = 0;
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sigframe thisframe (mainthread);
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if (closesocket (get_socket ()))
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{
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set_winsock_errno ();
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res = -1;
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}
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close_secret_event ();
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return res;
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}
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#define ASYNC_MASK (FD_READ|FD_WRITE|FD_OOB|FD_ACCEPT|FD_CONNECT)
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/* Cygwin internal */
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int
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fhandler_socket::ioctl (unsigned int cmd, void *p)
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{
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extern int get_ifconf (struct ifconf *ifc, int what); /* net.cc */
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int res;
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struct ifconf ifc, *ifcp;
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struct ifreq *ifr, *ifrp;
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sigframe thisframe (mainthread);
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switch (cmd)
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{
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case SIOCGIFCONF:
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ifcp = (struct ifconf *) p;
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if (!ifcp)
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{
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set_errno (EINVAL);
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return -1;
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}
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res = get_ifconf (ifcp, cmd);
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if (res)
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debug_printf ("error in get_ifconf\n");
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break;
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case SIOCGIFFLAGS:
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ifr = (struct ifreq *) p;
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if (ifr == 0)
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{
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set_errno (EINVAL);
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return -1;
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}
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ifr->ifr_flags = IFF_NOTRAILERS | IFF_UP | IFF_RUNNING;
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if (((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr
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== INADDR_LOOPBACK)
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ifr->ifr_flags |= IFF_LOOPBACK;
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else
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ifr->ifr_flags |= IFF_BROADCAST;
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res = 0;
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break;
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case SIOCGIFBRDADDR:
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case SIOCGIFNETMASK:
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case SIOCGIFADDR:
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case SIOCGIFHWADDR:
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case SIOCGIFMETRIC:
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case SIOCGIFMTU:
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{
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ifc.ifc_len = 2048;
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ifc.ifc_buf = (char *) alloca (2048);
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ifr = (struct ifreq *) p;
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if (ifr == 0)
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{
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debug_printf ("ifr == NULL\n");
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set_errno (EINVAL);
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return -1;
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}
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res = get_ifconf (&ifc, cmd);
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if (res)
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{
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debug_printf ("error in get_ifconf\n");
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break;
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}
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debug_printf (" name: %s\n", ifr->ifr_name);
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for (ifrp = ifc.ifc_req;
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(caddr_t) ifrp < ifc.ifc_buf + ifc.ifc_len;
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++ifrp)
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{
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debug_printf ("testname: %s\n", ifrp->ifr_name);
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if (! strcmp (ifrp->ifr_name, ifr->ifr_name))
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{
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switch (cmd)
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{
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case SIOCGIFADDR:
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ifr->ifr_addr = ifrp->ifr_addr;
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break;
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case SIOCGIFBRDADDR:
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ifr->ifr_broadaddr = ifrp->ifr_broadaddr;
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break;
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case SIOCGIFNETMASK:
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ifr->ifr_netmask = ifrp->ifr_netmask;
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break;
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case SIOCGIFHWADDR:
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ifr->ifr_hwaddr = ifrp->ifr_hwaddr;
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break;
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case SIOCGIFMETRIC:
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ifr->ifr_metric = ifrp->ifr_metric;
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break;
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case SIOCGIFMTU:
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ifr->ifr_mtu = ifrp->ifr_mtu;
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break;
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}
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break;
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}
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}
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if ((caddr_t) ifrp >= ifc.ifc_buf + ifc.ifc_len)
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{
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set_errno (EINVAL);
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return -1;
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}
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break;
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}
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case FIOASYNC:
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res = WSAAsyncSelect (get_socket (), gethwnd (), WM_ASYNCIO,
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*(int *) p ? ASYNC_MASK : 0);
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syscall_printf ("Async I/O on socket %s",
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*(int *) p ? "started" : "cancelled");
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set_async (*(int *) p);
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break;
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default:
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/* We must cancel WSAAsyncSelect (if any) before setting socket to
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* blocking mode
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*/
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if (cmd == FIONBIO && *(int *) p == 0)
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WSAAsyncSelect (get_socket (), gethwnd (), 0, 0);
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res = ioctlsocket (get_socket (), cmd, (unsigned long *) p);
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if (res == SOCKET_ERROR)
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set_winsock_errno ();
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if (cmd == FIONBIO)
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{
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syscall_printf ("socket is now %sblocking",
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*(int *) p ? "un" : "");
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/* Start AsyncSelect if async socket unblocked */
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if (*(int *) p && get_async ())
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WSAAsyncSelect (get_socket (), gethwnd (), WM_ASYNCIO, ASYNC_MASK);
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}
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break;
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}
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syscall_printf ("%d = ioctl_socket (%x, %x)", res, cmd, p);
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return res;
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}
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int
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fhandler_socket::fcntl (int cmd, void *arg)
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{
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int res = 0;
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int request, current;
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switch (cmd)
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{
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case F_SETFL:
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{
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/* Care for the old O_NDELAY flag. If one of the flags is set,
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both flags are set. */
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int new_flags = (int) arg;
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if (new_flags & (O_NONBLOCK | OLD_O_NDELAY))
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new_flags |= O_NONBLOCK | OLD_O_NDELAY;
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request = (new_flags & O_NONBLOCK) ? 1 : 0;
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current = (get_flags () & O_NONBLOCK) ? 1 : 0;
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if (request != current && (res = ioctl (FIONBIO, &request)))
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break;
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if (request)
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set_flags (get_flags () | O_NONBLOCK | OLD_O_NDELAY);
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else
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set_flags (get_flags () & ~(O_NONBLOCK | OLD_O_NDELAY));
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break;
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}
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default:
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res = fhandler_base::fcntl (cmd, arg);
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break;
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}
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return res;
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}
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