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 Wireshark binary and one TShark binary
5 * for Windows, regardless of whether WinPcap is installed or not.
9 * Wireshark - Network traffic analyzer
10 * By Gerald Combs <gerald@wireshark.org>
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
39 /* XXX - yes, I know, I should move cppmagic.h to a generic location. */
40 #include "tools/lemon/cppmagic.h"
42 #include <epan/value_string.h>
44 #include <winsock2.h> /* Needed here to force a definition of WINVER */
45 /* for some (all ?) Microsoft compilers newer than vc6. */
46 /* (If windows.h were used instead, there might be */
47 /* issues re winsock.h included before winsock2.h ) */
51 #include "capture_wpcap_packet.h"
52 #include <wsutil/file_util.h>
54 /* packet32.h requires sockaddr_storage
55 * whether sockaddr_storage is defined or not depends on the Platform SDK
56 * version installed. The only one not defining it is the SDK that comes
57 * with MSVC 6.0 (WINVER 0x0400).
59 * copied from RFC2553 (and slightly modified because of datatypes) ...
60 * XXX - defined more than once, move this to a header file */
62 #error WINVER not defined ....
64 #if (WINVER <= 0x0400) && defined(_MSC_VER)
65 typedef unsigned short eth_sa_family_t;
68 * Desired design of maximum size and alignment
70 #define ETH_SS_MAXSIZE 128 /* Implementation specific max size */
71 #define ETH_SS_ALIGNSIZE (sizeof (gint64 /*int64_t*/))
72 /* Implementation specific desired alignment */
74 * Definitions used for sockaddr_storage structure paddings design.
76 #define ETH_SS_PAD1SIZE (ETH_SS_ALIGNSIZE - sizeof (eth_sa_family_t))
77 #define ETH_SS_PAD2SIZE (ETH_SS_MAXSIZE - (sizeof (eth_sa_family_t) + \
78 ETH_SS_PAD1SIZE + ETH_SS_ALIGNSIZE))
80 struct sockaddr_storage {
81 eth_sa_family_t __ss_family; /* address family */
82 /* Following fields are implementation specific */
83 char __ss_pad1[ETH_SS_PAD1SIZE];
84 /* 6 byte pad, this is to make implementation */
85 /* specific pad up to alignment field that */
86 /* follows explicit in the data structure */
87 gint64 /*int64_t*/ __ss_align; /* field to force desired structure */
88 /* storage alignment */
89 char __ss_pad2[ETH_SS_PAD2SIZE];
90 /* 112 byte pad to achieve desired size, */
91 /* _SS_MAXSIZE value minus size of ss_family */
92 /* __ss_pad1, __ss_align fields is 112 */
94 /* ... copied from RFC2553 */
99 gboolean has_wpacket = FALSE;
102 /* This module will use the PacketRequest function in packet.dll (coming with WinPcap) to "directly" access
103 * the Win32 NDIS network driver(s) and ask for various values (status, statistics, ...).
105 * Unfortunately, the definitions required for this are not available through the usual windows header files,
106 * but require the Windows "Device Driver Kit" which is not available for free :-(
108 * Fortunately, the definitions needed to access the various NDIS values are available from various OSS projects:
109 * - WinPcap in Ntddndis.h
110 * - Ndiswrapper in driver/ndis.h and driver/iw_ndis.h
111 * - cygwin (MingW?) in usr/include/w32api/ddk/ndis.h and ntddndis.h
112 * - FreeBSD (netperf)
115 /* The MSDN description of the NDIS driver API is available at:
116 /* MSDN Home > MSDN Library > Win32 and COM Development > Driver Development Kit > Network Devices and Protocols > Reference */
118 /* http://msdn.microsoft.com/library/default.asp?url=/library/en-us/network/hh/network/21oidovw_d55042e5-0b8a-4439-8ef2-be7331e98464.xml.asp */
120 /* Some more interesting links:
121 * http://sourceforge.net/projects/ndiswrapper/
122 * http://www.osronline.com/lists_archive/windbg/thread521.html
123 * http://cvs.sourceforge.net/viewcvs.py/mingw/w32api/include/ddk/ndis.h?view=markup
124 * http://cvs.sourceforge.net/viewcvs.py/mingw/w32api/include/ddk/ntddndis.h?view=markup
129 /******************************************************************************************************************************/
130 /* stuff to load WinPcap's packet.dll and the functions required from it */
132 static PCHAR (*p_PacketGetVersion) (void);
133 static LPADAPTER (*p_PacketOpenAdapter) (char *adaptername);
134 static void (*p_PacketCloseAdapter) (LPADAPTER);
135 static int (*p_PacketRequest) (LPADAPTER, int, void *);
143 #define SYM(x, y) { STRINGIFY(x) , (gpointer) &CONCAT(p_,x), y }
146 wpcap_packet_load(void)
149 /* These are the symbols I need or want from packet.dll */
150 static const symbol_table_t symbols[] = {
151 SYM(PacketGetVersion, FALSE),
152 SYM(PacketOpenAdapter, FALSE),
153 SYM(PacketCloseAdapter, FALSE),
154 SYM(PacketRequest, FALSE),
155 { NULL, NULL, FALSE }
158 GModule *wh; /* wpcap handle */
159 const symbol_table_t *sym;
161 wh = ws_module_open("packet.dll", 0);
169 if (!g_module_symbol(wh, sym->name, sym->ptr)) {
172 * We don't care if it's missing; we just
178 * We require this symbol.
191 /******************************************************************************************************************************/
192 /* functions to access the NDIS driver values */
195 /* get dll version */
197 wpcap_packet_get_version(void)
202 return p_PacketGetVersion();
206 /* open the interface */
208 wpcap_packet_open(char *if_name)
212 g_assert(has_wpacket);
213 adapter = p_PacketOpenAdapter(if_name);
219 /* close the interface */
221 wpcap_packet_close(void *adapter)
224 g_assert(has_wpacket);
225 p_PacketCloseAdapter(adapter);
229 /* do a packet request call */
231 wpcap_packet_request(void *adapter, ULONG Oid, int set, char *value, unsigned int *length)
234 ULONG IoCtlBufferLength=(sizeof(PACKET_OID_DATA) + (*length) - 1);
235 PPACKET_OID_DATA OidData;
238 g_assert(has_wpacket);
240 if(p_PacketRequest == NULL) {
241 g_warning("packet_request not available\n");
245 /* get a buffer suitable for PacketRequest() */
246 OidData=GlobalAllocPtr(GMEM_MOVEABLE | GMEM_ZEROINIT,IoCtlBufferLength);
247 if (OidData == NULL) {
248 g_warning("GlobalAllocPtr failed for %u\n", IoCtlBufferLength);
253 OidData->Length = *length;
254 memcpy(OidData->Data, value, *length);
256 Status = p_PacketRequest(adapter, set, OidData);
259 if(OidData->Length <= *length) {
260 /* copy value from driver */
261 memcpy(value, OidData->Data, OidData->Length);
262 *length = OidData->Length;
264 /* the driver returned a value that is longer than expected (and longer than the given buffer) */
265 g_warning("returned oid too long, Oid: 0x%x OidLen:%u MaxLen:%u", Oid, OidData->Length, *length);
270 GlobalFreePtr (OidData);
280 /* get an UINT value using the packet request call */
282 wpcap_packet_request_uint(void *adapter, ULONG Oid, UINT *value)
285 int length = sizeof(UINT);
288 Status = wpcap_packet_request(adapter, Oid, FALSE /* !set */, (char *) value, &length);
289 if(Status && length == sizeof(UINT)) {
297 /* get an ULONG value using the NDIS packet request call */
299 wpcap_packet_request_ulong(void *adapter, ULONG Oid, ULONG *value)
302 int length = sizeof(ULONG);
305 Status = wpcap_packet_request(adapter, Oid, FALSE /* !set */, (char *) value, &length);
306 if(Status && length == sizeof(ULONG)) {
314 #else /* HAVE_LIBPCAP && _WIN32 */
317 wpcap_packet_load(void)
322 #endif /* HAVE_LIBPCAP */
325 * Editor modelines - http://www.wireshark.org/tools/modelines.html
330 * indent-tabs-mode: nil
333 * ex: set shiftwidth=4 tabstop=8 expandtab
334 * :indentSize=4:tabSize=8:noTabs=true: