1 /* capture_wpcap_packet.c
2 * WinPcap-specific interfaces for low-level information (packet.dll).
3 * We load WinPcap at run
4 * time, so that we only need one Ethereal binary and one Tethereal binary
5 * for Windows, regardless of whether WinPcap is installed or not.
9 * Ethereal - Network traffic analyzer
10 * By Gerald Combs <gerald@ethereal.com>
11 * Copyright 2001 Gerald Combs
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version 2
16 * of the License, or (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
32 #if defined HAVE_LIBPCAP && defined _WIN32
40 /* XXX - yes, I know, I should move cppmagic.h to a generic location. */
41 #include "tools/lemon/cppmagic.h"
43 #include <epan/value_string.h>
47 #ifndef HAVE_SOCKADDR_STORAGE
48 /* packet32.h requires sockaddr_storage (usually defined in Platform SDK)
49 * copied from RFC2553 (and slightly modified because of datatypes) ...
50 * XXX - defined more than once, move this to a header file */
51 typedef unsigned short eth_sa_family_t;
54 * Desired design of maximum size and alignment
56 #define ETH_SS_MAXSIZE 128 /* Implementation specific max size */
57 #define ETH_SS_ALIGNSIZE (sizeof (gint64 /*int64_t*/))
58 /* Implementation specific desired alignment */
60 * Definitions used for sockaddr_storage structure paddings design.
62 #define ETH_SS_PAD1SIZE (ETH_SS_ALIGNSIZE - sizeof (eth_sa_family_t))
63 #define ETH_SS_PAD2SIZE (ETH_SS_MAXSIZE - (sizeof (eth_sa_family_t) + \
64 ETH_SS_PAD1SIZE + ETH_SS_ALIGNSIZE))
66 struct sockaddr_storage {
67 eth_sa_family_t __ss_family; /* address family */
68 /* Following fields are implementation specific */
69 char __ss_pad1[ETH_SS_PAD1SIZE];
70 /* 6 byte pad, this is to make implementation */
71 /* specific pad up to alignment field that */
72 /* follows explicit in the data structure */
73 gint64 /*int64_t*/ __ss_align; /* field to force desired structure */
74 /* storage alignment */
75 char __ss_pad2[ETH_SS_PAD2SIZE];
76 /* 112 byte pad to achieve desired size, */
77 /* _SS_MAXSIZE value minus size of ss_family */
78 /* __ss_pad1, __ss_align fields is 112 */
80 /* ... copied from RFC2553 */
89 #include "capture_wpcap_packet.h"
91 gboolean has_wpacket = FALSE;
94 /* This module will use the PacketRequest function in packet.dll (coming with WinPcap) to "directly" access
95 * the Win32 NDIS network driver(s) and ask for various values (status, statistics, ...).
97 * Unfortunately, the definitions required for this are not available through the usual windows header files,
98 * but require the Windows "Device Driver Kit" which is not available for free :-(
100 * Fortunately, the definitions needed to access the various NDIS values are available from various OSS projects:
101 * - WinPcap in Ntddndis.h
102 * - Ndiswrapper in driver/ndis.h and driver/iw_ndis.h
103 * - cygwin (MingW?) in usr/include/w32api/ddk/ndis.h and ntddndis.h
104 * - FreeBSD (netperf)
107 /* The MSDN description of the NDIS driver API is available at:
108 /* MSDN Home > MSDN Library > Win32 and COM Development > Driver Development Kit > Network Devices and Protocols > Reference */
110 /* http://msdn.microsoft.com/library/default.asp?url=/library/en-us/network/hh/network/21oidovw_d55042e5-0b8a-4439-8ef2-be7331e98464.xml.asp */
112 /* Some more interesting links:
113 * http://sourceforge.net/projects/ndiswrapper/
114 * http://www.osronline.com/lists_archive/windbg/thread521.html
115 * http://cvs.sourceforge.net/viewcvs.py/mingw/w32api/include/ddk/ndis.h?view=markup
116 * http://cvs.sourceforge.net/viewcvs.py/mingw/w32api/include/ddk/ntddndis.h?view=markup
121 /******************************************************************************************************************************/
122 /* stuff to load WinPcap's packet.dll and the functions required from it */
124 static PCHAR (*p_PacketGetVersion) (void);
125 static LPADAPTER (*p_PacketOpenAdapter) (char *adaptername);
126 static void (*p_PacketCloseAdapter) (LPADAPTER);
127 static int (*p_PacketRequest) (LPADAPTER, int, void *);
135 #define SYM(x, y) { STRINGIFY(x) , (gpointer) &CONCAT(p_,x), y }
138 wpcap_packet_load(void)
141 /* These are the symbols I need or want from packet.dll */
142 static const symbol_table_t symbols[] = {
143 SYM(PacketGetVersion, FALSE),
144 SYM(PacketOpenAdapter, FALSE),
145 SYM(PacketCloseAdapter, FALSE),
146 SYM(PacketRequest, FALSE),
147 { NULL, NULL, FALSE }
150 GModule *wh; /* wpcap handle */
151 const symbol_table_t *sym;
153 wh = g_module_open("packet", 0);
161 if (!g_module_symbol(wh, sym->name, sym->ptr)) {
164 * We don't care if it's missing; we just
170 * We require this symbol.
183 /******************************************************************************************************************************/
184 /* functions to access the NDIS driver values */
187 /* get dll version */
189 wpcap_packet_get_version(void)
194 return p_PacketGetVersion();
198 /* open the interface */
200 wpcap_packet_open(char *if_name)
204 g_assert(has_wpacket);
205 adapter = p_PacketOpenAdapter(if_name);
211 /* close the interface */
213 wpcap_packet_close(void *adapter)
216 g_assert(has_wpacket);
217 p_PacketCloseAdapter(adapter);
221 /* do a packet request call */
223 wpcap_packet_request(void *adapter, ULONG Oid, int set, char *value, unsigned int *length)
226 ULONG IoCtlBufferLength=(sizeof(PACKET_OID_DATA) + (*length) - 1);
227 PPACKET_OID_DATA OidData;
230 g_assert(has_wpacket);
232 if(p_PacketRequest == NULL) {
233 g_warning("packet_request not available\n");
237 OidData=GlobalAllocPtr(GMEM_MOVEABLE | GMEM_ZEROINIT,IoCtlBufferLength);
238 if (OidData == NULL) {
239 g_warning("packet_link_status failed\n");
244 OidData->Length = *length;
246 Status = p_PacketRequest(adapter, set, OidData);
249 g_assert(OidData->Length <= *length);
250 memcpy(value, OidData->Data, OidData->Length);
251 *length = OidData->Length;
254 GlobalFreePtr (OidData);
264 /* get an UINT value using the packet request call */
266 wpcap_packet_request_uint(void *adapter, ULONG Oid, UINT *value)
269 int length = sizeof(UINT);
272 Status = wpcap_packet_request(adapter, Oid, FALSE /* !set */, (char *) value, &length);
274 g_assert(length == sizeof(UINT));
282 /* get an ULONG value using the NDIS packet request call */
284 wpcap_packet_request_ulong(void *adapter, ULONG Oid, ULONG *value)
287 int length = sizeof(ULONG);
290 Status = wpcap_packet_request(adapter, Oid, FALSE /* !set */, (char *) value, &length);
292 g_assert(length == sizeof(ULONG));
300 #else /* HAVE_LIBPCAP && _WIN32 */
303 wpcap_packet_load(void)
308 #endif /* HAVE_LIBPCAP */