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Diffstat (limited to 'capture_wpcap_packet.c')
| -rw-r--r-- | capture_wpcap_packet.c | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/capture_wpcap_packet.c b/capture_wpcap_packet.c new file mode 100644 index 0000000000..a16535e11e --- /dev/null +++ b/capture_wpcap_packet.c @@ -0,0 +1,252 @@ +/* capture_wpcap_packet.c + * WinPcap-specific interfaces for low-level information (packet.dll). + * We load WinPcap at run + * time, so that we only need one Ethereal binary and one Tethereal binary + * for Windows, regardless of whether WinPcap is installed or not. + * + * $Id$ + * + * Ethereal - Network traffic analyzer + * By Gerald Combs <gerald@ethereal.com> + * Copyright 2001 Gerald Combs + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#if defined HAVE_LIBPCAP && defined _WIN32 + +#include <glib.h> +#include <gmodule.h> + +/* XXX - yes, I know, I should move cppmagic.h to a generic location. */ +#include "tools/lemon/cppmagic.h" + +#include <epan/value_string.h> + +#include <Packet32.h> +#include <windows.h> +#include <windowsx.h> +#include <Ntddndis.h> + +#include "capture_wpcap_packet.h" + +gboolean has_wpacket = FALSE; + + +/* This module will use the PacketRequest function in packet.dll (coming with WinPcap) to "directly" access + * the Win32 NDIS network driver(s) and ask for various values (status, statistics, ...). + * + * Unfortunately, the definitions required for this are not available through the usual windows header files, + * but require the Windows "Device Driver Kit" which is not available for free :-( + * + * Fortunately, the definitions needed to access the various NDIS values are available from various OSS projects: + * - WinPcap in Ntddndis.h + * - Ndiswrapper in driver/ndis.h and driver/iw_ndis.h + * - cygwin (MingW?) in usr/include/w32api/ddk/ndis.h and ntddndis.h + * - FreeBSD (netperf) + */ + +/* The MSDN description of the NDIS driver API is available at: +/* MSDN Home > MSDN Library > Win32 and COM Development > Driver Development Kit > Network Devices and Protocols > Reference */ +/* "NDIS Objects" */ +/* http://msdn.microsoft.com/library/default.asp?url=/library/en-us/network/hh/network/21oidovw_d55042e5-0b8a-4439-8ef2-be7331e98464.xml.asp */ + +/* Some more interesting links: + * http://sourceforge.net/projects/ndiswrapper/ + * http://www.osronline.com/lists_archive/windbg/thread521.html + * http://cvs.sourceforge.net/viewcvs.py/mingw/w32api/include/ddk/ndis.h?view=markup + * http://cvs.sourceforge.net/viewcvs.py/mingw/w32api/include/ddk/ntddndis.h?view=markup + */ + + + +/******************************************************************************************************************************/ +/* stuff to load WinPcap's packet.dll and the functions required from it */ + +static LPADAPTER (*p_PacketOpenAdapter) (char *adaptername); +static void (*p_PacketCloseAdapter) (LPADAPTER); +static int (*p_PacketRequest) (LPADAPTER, int, void *); + +typedef struct { + const char *name; + gpointer *ptr; + gboolean optional; +} symbol_table_t; + +#define SYM(x, y) { STRINGIFY(x) , (gpointer) &CONCAT(p_,x), y } + +void +wpcap_packet_load(void) +{ + + /* These are the symbols I need or want from packet.dll */ + static const symbol_table_t symbols[] = { + SYM(PacketOpenAdapter, FALSE), + SYM(PacketCloseAdapter, FALSE), + SYM(PacketRequest, TRUE), + { NULL, NULL, FALSE } + }; + + GModule *wh; /* wpcap handle */ + const symbol_table_t *sym; + + wh = g_module_open("packet", 0); + + if (!wh) { + return; + } + + sym = symbols; + while (sym->name) { + if (!g_module_symbol(wh, sym->name, sym->ptr)) { + if (sym->optional) { + /* + * We don't care if it's missing; we just + * don't use it. + */ + *sym->ptr = NULL; + } else { + /* + * We require this symbol. + */ + return; + } + } + sym++; + } + + + has_wpacket = TRUE; +} + + + +/******************************************************************************************************************************/ +/* functions to access the NDIS driver values */ + + +/* open the interface */ +LPADAPTER +wpcap_packet_open(char *if_name) +{ + LPADAPTER adapter; + + adapter = p_PacketOpenAdapter(if_name); + + return adapter; +} + + +/* close the interface */ +void +wpcap_packet_close(LPADAPTER adapter) +{ + + p_PacketCloseAdapter(adapter); +} + + +/* do a packet request call */ +int +wpcap_packet_request(LPADAPTER a, ULONG Oid, int set, char *value, unsigned int *length) +{ + BOOLEAN Status; + ULONG IoCtlBufferLength=(sizeof(PACKET_OID_DATA) + (*length) - 1); + PPACKET_OID_DATA OidData; + + + g_assert(has_wpacket); + + if(p_PacketRequest == NULL) { + g_warning("packet_request not available\n"); + return 0; + } + + OidData=GlobalAllocPtr(GMEM_MOVEABLE | GMEM_ZEROINIT,IoCtlBufferLength); + if (OidData == NULL) { + g_warning("packet_link_status failed\n"); + return 0; + } + + OidData->Oid = Oid; + OidData->Length = *length; + + Status = p_PacketRequest(a, set, OidData); + + if(Status) { + g_assert(OidData->Length <= *length); + memcpy(value, OidData->Data, OidData->Length); + *length = OidData->Length; + } + + GlobalFreePtr (OidData); + + if(Status) { + return 1; + } else { + return 0; + } +} + + +/* get an UINT value using the packet request call */ +int +wpcap_packet_request_uint(LPADAPTER a, ULONG Oid, UINT *value) +{ + BOOLEAN Status; + int length = sizeof(UINT); + + + Status = wpcap_packet_request(a, Oid, FALSE /* !set */, (char *) value, &length); + if(Status) { + g_assert(length == sizeof(UINT)); + return 1; + } else { + return 0; + } +} + + +/* get an ULONG value using the NDIS packet request call */ +int +wpcap_packet_request_ulong(LPADAPTER a, ULONG Oid, ULONG *value) +{ + BOOLEAN Status; + int length = sizeof(ULONG); + + + Status = wpcap_packet_request(a, Oid, FALSE /* !set */, (char *) value, &length); + if(Status) { + g_assert(length == sizeof(ULONG)); + return 1; + } else { + return 0; + } +} + + +#else /* HAVE_LIBPCAP && _WIN32 */ + +void +wpcap_packet_load(void) +{ + return; +} + +#endif /* HAVE_LIBPCAP */ |