Local changes: - In contrib/libpcap/pcap/bpf.h, do not include pcap/dlt.h. Our system net/dlt.h is pulled in from net/bpf.h. - sys/net/dlt.h: Incorporate changes from libpcap 1.10.3. - lib/libpcap/Makefile: Update for libpcap 1.10.3. Changelog: https://git.tcpdump.org/libpcap/blob/95691ebe7564afa3faa5c6ba0dbd17e351be455a:/CHANGES Reviewed by: emaste Obtained from: https://www.tcpdump.org/release/libpcap-1.10.3.tar.gz Sponsored by: The FreeBSD Foundation
2750 lines
70 KiB
C
2750 lines
70 KiB
C
/*
|
|
* Copyright (c) 1999 - 2005 NetGroup, Politecnico di Torino (Italy)
|
|
* Copyright (c) 2005 - 2010 CACE Technologies, Davis (California)
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the Politecnico di Torino, CACE Technologies
|
|
* nor the names of its contributors may be used to endorse or promote
|
|
* products derived from this software without specific prior written
|
|
* permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif
|
|
|
|
#include <errno.h>
|
|
#include <limits.h> /* for INT_MAX */
|
|
#define PCAP_DONT_INCLUDE_PCAP_BPF_H
|
|
#include <Packet32.h>
|
|
#include <pcap-int.h>
|
|
#include <pcap/dlt.h>
|
|
|
|
/*
|
|
* XXX - Packet32.h defines bpf_program, so we can't include
|
|
* <pcap/bpf.h>, which also defines it; that's why we define
|
|
* PCAP_DONT_INCLUDE_PCAP_BPF_H,
|
|
*
|
|
* However, no header in the WinPcap or Npcap SDKs defines the
|
|
* macros for BPF code, so we have to define them ourselves.
|
|
*/
|
|
#define BPF_RET 0x06
|
|
#define BPF_K 0x00
|
|
|
|
/* Old-school MinGW have these headers in a different place.
|
|
*/
|
|
#if defined(__MINGW32__) && !defined(__MINGW64_VERSION_MAJOR)
|
|
#include <ddk/ntddndis.h>
|
|
#include <ddk/ndis.h>
|
|
#else
|
|
#include <ntddndis.h> /* MSVC/TDM-MinGW/MinGW64 */
|
|
#endif
|
|
|
|
#ifdef HAVE_DAG_API
|
|
#include <dagnew.h>
|
|
#include <dagapi.h>
|
|
#endif /* HAVE_DAG_API */
|
|
|
|
#include "diag-control.h"
|
|
|
|
#include "pcap-airpcap.h"
|
|
|
|
static int pcap_setfilter_npf(pcap_t *, struct bpf_program *);
|
|
static int pcap_setfilter_win32_dag(pcap_t *, struct bpf_program *);
|
|
static int pcap_getnonblock_npf(pcap_t *);
|
|
static int pcap_setnonblock_npf(pcap_t *, int);
|
|
|
|
/*dimension of the buffer in the pcap_t structure*/
|
|
#define WIN32_DEFAULT_USER_BUFFER_SIZE 256000
|
|
|
|
/*dimension of the buffer in the kernel driver NPF */
|
|
#define WIN32_DEFAULT_KERNEL_BUFFER_SIZE 1000000
|
|
|
|
/* Equivalent to ntohs(), but a lot faster under Windows */
|
|
#define SWAPS(_X) ((_X & 0xff) << 8) | (_X >> 8)
|
|
|
|
/*
|
|
* Private data for capturing on WinPcap/Npcap devices.
|
|
*/
|
|
struct pcap_win {
|
|
ADAPTER *adapter; /* the packet32 ADAPTER for the device */
|
|
int nonblock;
|
|
int rfmon_selfstart; /* a flag tells whether the monitor mode is set by itself */
|
|
int filtering_in_kernel; /* using kernel filter */
|
|
|
|
#ifdef HAVE_DAG_API
|
|
int dag_fcs_bits; /* Number of checksum bits from link layer */
|
|
#endif
|
|
|
|
#ifdef ENABLE_REMOTE
|
|
int samp_npkt; /* parameter needed for sampling, with '1 out of N' method has been requested */
|
|
struct timeval samp_time; /* parameter needed for sampling, with '1 every N ms' method has been requested */
|
|
#endif
|
|
};
|
|
|
|
/*
|
|
* Define stub versions of the monitor-mode support routines if this
|
|
* isn't Npcap. HAVE_NPCAP_PACKET_API is defined by Npcap but not
|
|
* WinPcap.
|
|
*/
|
|
#ifndef HAVE_NPCAP_PACKET_API
|
|
static int
|
|
PacketIsMonitorModeSupported(PCHAR AdapterName _U_)
|
|
{
|
|
/*
|
|
* We don't support monitor mode.
|
|
*/
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
PacketSetMonitorMode(PCHAR AdapterName _U_, int mode _U_)
|
|
{
|
|
/*
|
|
* This should never be called, as PacketIsMonitorModeSupported()
|
|
* will return 0, meaning "we don't support monitor mode, so
|
|
* don't try to turn it on or off".
|
|
*/
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
PacketGetMonitorMode(PCHAR AdapterName _U_)
|
|
{
|
|
/*
|
|
* This should fail, so that pcap_activate_npf() returns
|
|
* PCAP_ERROR_RFMON_NOTSUP if our caller requested monitor
|
|
* mode.
|
|
*/
|
|
return (-1);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Sigh. PacketRequest() will have made a DeviceIoControl()
|
|
* call to the NPF driver to perform the OID request, with a
|
|
* BIOCQUERYOID ioctl. The kernel code should get back one
|
|
* of NDIS_STATUS_INVALID_OID, NDIS_STATUS_NOT_SUPPORTED,
|
|
* or NDIS_STATUS_NOT_RECOGNIZED if the OID request isn't
|
|
* supported by the OS or the driver, but that doesn't seem
|
|
* to make it to the caller of PacketRequest() in a
|
|
* reliable fashion.
|
|
*/
|
|
#define NDIS_STATUS_INVALID_OID 0xc0010017
|
|
#define NDIS_STATUS_NOT_SUPPORTED 0xc00000bb /* STATUS_NOT_SUPPORTED */
|
|
#define NDIS_STATUS_NOT_RECOGNIZED 0x00010001
|
|
|
|
static int
|
|
oid_get_request(ADAPTER *adapter, bpf_u_int32 oid, void *data, size_t *lenp,
|
|
char *errbuf)
|
|
{
|
|
PACKET_OID_DATA *oid_data_arg;
|
|
|
|
/*
|
|
* Allocate a PACKET_OID_DATA structure to hand to PacketRequest().
|
|
* It should be big enough to hold "*lenp" bytes of data; it
|
|
* will actually be slightly larger, as PACKET_OID_DATA has a
|
|
* 1-byte data array at the end, standing in for the variable-length
|
|
* data that's actually there.
|
|
*/
|
|
oid_data_arg = malloc(sizeof (PACKET_OID_DATA) + *lenp);
|
|
if (oid_data_arg == NULL) {
|
|
snprintf(errbuf, PCAP_ERRBUF_SIZE,
|
|
"Couldn't allocate argument buffer for PacketRequest");
|
|
return (PCAP_ERROR);
|
|
}
|
|
|
|
/*
|
|
* No need to copy the data - we're doing a fetch.
|
|
*/
|
|
oid_data_arg->Oid = oid;
|
|
oid_data_arg->Length = (ULONG)(*lenp); /* XXX - check for ridiculously large value? */
|
|
if (!PacketRequest(adapter, FALSE, oid_data_arg)) {
|
|
pcap_fmt_errmsg_for_win32_err(errbuf, PCAP_ERRBUF_SIZE,
|
|
GetLastError(), "Error calling PacketRequest");
|
|
free(oid_data_arg);
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* Get the length actually supplied.
|
|
*/
|
|
*lenp = oid_data_arg->Length;
|
|
|
|
/*
|
|
* Copy back the data we fetched.
|
|
*/
|
|
memcpy(data, oid_data_arg->Data, *lenp);
|
|
free(oid_data_arg);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
pcap_stats_npf(pcap_t *p, struct pcap_stat *ps)
|
|
{
|
|
struct pcap_win *pw = p->priv;
|
|
struct bpf_stat bstats;
|
|
|
|
/*
|
|
* Try to get statistics.
|
|
*
|
|
* (Please note - "struct pcap_stat" is *not* the same as
|
|
* WinPcap's "struct bpf_stat". It might currently have the
|
|
* same layout, but let's not cheat.
|
|
*
|
|
* Note also that we don't fill in ps_capt, as we might have
|
|
* been called by code compiled against an earlier version of
|
|
* WinPcap that didn't have ps_capt, in which case filling it
|
|
* in would stomp on whatever comes after the structure passed
|
|
* to us.
|
|
*/
|
|
if (!PacketGetStats(pw->adapter, &bstats)) {
|
|
pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
GetLastError(), "PacketGetStats error");
|
|
return (-1);
|
|
}
|
|
ps->ps_recv = bstats.bs_recv;
|
|
ps->ps_drop = bstats.bs_drop;
|
|
|
|
/*
|
|
* XXX - PacketGetStats() doesn't fill this in, so we just
|
|
* return 0.
|
|
*/
|
|
#if 0
|
|
ps->ps_ifdrop = bstats.ps_ifdrop;
|
|
#else
|
|
ps->ps_ifdrop = 0;
|
|
#endif
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Win32-only routine for getting statistics.
|
|
*
|
|
* This way is definitely safer than passing the pcap_stat * from the userland.
|
|
* In fact, there could happen than the user allocates a variable which is not
|
|
* big enough for the new structure, and the library will write in a zone
|
|
* which is not allocated to this variable.
|
|
*
|
|
* In this way, we're pretty sure we are writing on memory allocated to this
|
|
* variable.
|
|
*
|
|
* XXX - but this is the wrong way to handle statistics. Instead, we should
|
|
* have an API that returns data in a form like the Options section of a
|
|
* pcapng Interface Statistics Block:
|
|
*
|
|
* https://xml2rfc.tools.ietf.org/cgi-bin/xml2rfc.cgi?url=https://raw.githubusercontent.com/pcapng/pcapng/master/draft-tuexen-opsawg-pcapng.xml&modeAsFormat=html/ascii&type=ascii#rfc.section.4.6
|
|
*
|
|
* which would let us add new statistics straightforwardly and indicate which
|
|
* statistics we are and are *not* providing, rather than having to provide
|
|
* possibly-bogus values for statistics we can't provide.
|
|
*/
|
|
static struct pcap_stat *
|
|
pcap_stats_ex_npf(pcap_t *p, int *pcap_stat_size)
|
|
{
|
|
struct pcap_win *pw = p->priv;
|
|
struct bpf_stat bstats;
|
|
|
|
*pcap_stat_size = sizeof (p->stat);
|
|
|
|
/*
|
|
* Try to get statistics.
|
|
*
|
|
* (Please note - "struct pcap_stat" is *not* the same as
|
|
* WinPcap's "struct bpf_stat". It might currently have the
|
|
* same layout, but let's not cheat.)
|
|
*/
|
|
if (!PacketGetStatsEx(pw->adapter, &bstats)) {
|
|
pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
GetLastError(), "PacketGetStatsEx error");
|
|
return (NULL);
|
|
}
|
|
p->stat.ps_recv = bstats.bs_recv;
|
|
p->stat.ps_drop = bstats.bs_drop;
|
|
p->stat.ps_ifdrop = bstats.ps_ifdrop;
|
|
/*
|
|
* Just in case this is ever compiled for a target other than
|
|
* Windows, which is somewhere between extremely unlikely and
|
|
* impossible.
|
|
*/
|
|
#ifdef _WIN32
|
|
p->stat.ps_capt = bstats.bs_capt;
|
|
#endif
|
|
return (&p->stat);
|
|
}
|
|
|
|
/* Set the dimension of the kernel-level capture buffer */
|
|
static int
|
|
pcap_setbuff_npf(pcap_t *p, int dim)
|
|
{
|
|
struct pcap_win *pw = p->priv;
|
|
|
|
if(PacketSetBuff(pw->adapter,dim)==FALSE)
|
|
{
|
|
snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "driver error: not enough memory to allocate the kernel buffer");
|
|
return (-1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/* Set the driver working mode */
|
|
static int
|
|
pcap_setmode_npf(pcap_t *p, int mode)
|
|
{
|
|
struct pcap_win *pw = p->priv;
|
|
|
|
if(PacketSetMode(pw->adapter,mode)==FALSE)
|
|
{
|
|
snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "driver error: working mode not recognized");
|
|
return (-1);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*set the minimum amount of data that will release a read call*/
|
|
static int
|
|
pcap_setmintocopy_npf(pcap_t *p, int size)
|
|
{
|
|
struct pcap_win *pw = p->priv;
|
|
|
|
if(PacketSetMinToCopy(pw->adapter, size)==FALSE)
|
|
{
|
|
snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "driver error: unable to set the requested mintocopy size");
|
|
return (-1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static HANDLE
|
|
pcap_getevent_npf(pcap_t *p)
|
|
{
|
|
struct pcap_win *pw = p->priv;
|
|
|
|
return (PacketGetReadEvent(pw->adapter));
|
|
}
|
|
|
|
static int
|
|
pcap_oid_get_request_npf(pcap_t *p, bpf_u_int32 oid, void *data, size_t *lenp)
|
|
{
|
|
struct pcap_win *pw = p->priv;
|
|
|
|
return (oid_get_request(pw->adapter, oid, data, lenp, p->errbuf));
|
|
}
|
|
|
|
static int
|
|
pcap_oid_set_request_npf(pcap_t *p, bpf_u_int32 oid, const void *data,
|
|
size_t *lenp)
|
|
{
|
|
struct pcap_win *pw = p->priv;
|
|
PACKET_OID_DATA *oid_data_arg;
|
|
|
|
/*
|
|
* Allocate a PACKET_OID_DATA structure to hand to PacketRequest().
|
|
* It should be big enough to hold "*lenp" bytes of data; it
|
|
* will actually be slightly larger, as PACKET_OID_DATA has a
|
|
* 1-byte data array at the end, standing in for the variable-length
|
|
* data that's actually there.
|
|
*/
|
|
oid_data_arg = malloc(sizeof (PACKET_OID_DATA) + *lenp);
|
|
if (oid_data_arg == NULL) {
|
|
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
"Couldn't allocate argument buffer for PacketRequest");
|
|
return (PCAP_ERROR);
|
|
}
|
|
|
|
oid_data_arg->Oid = oid;
|
|
oid_data_arg->Length = (ULONG)(*lenp); /* XXX - check for ridiculously large value? */
|
|
memcpy(oid_data_arg->Data, data, *lenp);
|
|
if (!PacketRequest(pw->adapter, TRUE, oid_data_arg)) {
|
|
pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
GetLastError(), "Error calling PacketRequest");
|
|
free(oid_data_arg);
|
|
return (PCAP_ERROR);
|
|
}
|
|
|
|
/*
|
|
* Get the length actually copied.
|
|
*/
|
|
*lenp = oid_data_arg->Length;
|
|
|
|
/*
|
|
* No need to copy the data - we're doing a set.
|
|
*/
|
|
free(oid_data_arg);
|
|
return (0);
|
|
}
|
|
|
|
static u_int
|
|
pcap_sendqueue_transmit_npf(pcap_t *p, pcap_send_queue *queue, int sync)
|
|
{
|
|
struct pcap_win *pw = p->priv;
|
|
u_int res;
|
|
|
|
res = PacketSendPackets(pw->adapter,
|
|
queue->buffer,
|
|
queue->len,
|
|
(BOOLEAN)sync);
|
|
|
|
if(res != queue->len){
|
|
pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
GetLastError(), "Error queueing packets");
|
|
}
|
|
|
|
return (res);
|
|
}
|
|
|
|
static int
|
|
pcap_setuserbuffer_npf(pcap_t *p, int size)
|
|
{
|
|
unsigned char *new_buff;
|
|
|
|
if (size<=0) {
|
|
/* Bogus parameter */
|
|
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
"Error: invalid size %d",size);
|
|
return (-1);
|
|
}
|
|
|
|
/* Allocate the buffer */
|
|
new_buff=(unsigned char*)malloc(sizeof(char)*size);
|
|
|
|
if (!new_buff) {
|
|
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
"Error: not enough memory");
|
|
return (-1);
|
|
}
|
|
|
|
free(p->buffer);
|
|
|
|
p->buffer=new_buff;
|
|
p->bufsize=size;
|
|
|
|
return (0);
|
|
}
|
|
|
|
#ifdef HAVE_NPCAP_PACKET_API
|
|
/*
|
|
* Kernel dump mode isn't supported in Npcap; calls to PacketSetDumpName(),
|
|
* PacketSetDumpLimits(), and PacketIsDumpEnded() will get compile-time
|
|
* deprecation warnings.
|
|
*
|
|
* Avoid calling them; just return errors indicating that kernel dump
|
|
* mode isn't supported in Npcap.
|
|
*/
|
|
static int
|
|
pcap_live_dump_npf(pcap_t *p, char *filename _U_, int maxsize _U_,
|
|
int maxpacks _U_)
|
|
{
|
|
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
"Npcap doesn't support kernel dump mode");
|
|
return (-1);
|
|
}
|
|
static int
|
|
pcap_live_dump_ended_npf(pcap_t *p, int sync)
|
|
{
|
|
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
"Npcap doesn't support kernel dump mode");
|
|
return (-1);
|
|
}
|
|
#else /* HAVE_NPCAP_PACKET_API */
|
|
static int
|
|
pcap_live_dump_npf(pcap_t *p, char *filename, int maxsize, int maxpacks)
|
|
{
|
|
struct pcap_win *pw = p->priv;
|
|
BOOLEAN res;
|
|
|
|
/* Set the packet driver in dump mode */
|
|
res = PacketSetMode(pw->adapter, PACKET_MODE_DUMP);
|
|
if(res == FALSE){
|
|
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
"Error setting dump mode");
|
|
return (-1);
|
|
}
|
|
|
|
/* Set the name of the dump file */
|
|
res = PacketSetDumpName(pw->adapter, filename, (int)strlen(filename));
|
|
if(res == FALSE){
|
|
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
"Error setting kernel dump file name");
|
|
return (-1);
|
|
}
|
|
|
|
/* Set the limits of the dump file */
|
|
res = PacketSetDumpLimits(pw->adapter, maxsize, maxpacks);
|
|
if(res == FALSE) {
|
|
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
"Error setting dump limit");
|
|
return (-1);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
pcap_live_dump_ended_npf(pcap_t *p, int sync)
|
|
{
|
|
struct pcap_win *pw = p->priv;
|
|
|
|
return (PacketIsDumpEnded(pw->adapter, (BOOLEAN)sync));
|
|
}
|
|
#endif /* HAVE_NPCAP_PACKET_API */
|
|
|
|
#ifdef HAVE_AIRPCAP_API
|
|
static PAirpcapHandle
|
|
pcap_get_airpcap_handle_npf(pcap_t *p)
|
|
{
|
|
struct pcap_win *pw = p->priv;
|
|
|
|
return (PacketGetAirPcapHandle(pw->adapter));
|
|
}
|
|
#else /* HAVE_AIRPCAP_API */
|
|
static PAirpcapHandle
|
|
pcap_get_airpcap_handle_npf(pcap_t *p _U_)
|
|
{
|
|
return (NULL);
|
|
}
|
|
#endif /* HAVE_AIRPCAP_API */
|
|
|
|
static int
|
|
pcap_read_npf(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
|
|
{
|
|
PACKET Packet;
|
|
int cc;
|
|
int n;
|
|
register u_char *bp, *ep;
|
|
u_char *datap;
|
|
struct pcap_win *pw = p->priv;
|
|
|
|
cc = p->cc;
|
|
if (cc == 0) {
|
|
/*
|
|
* Has "pcap_breakloop()" been called?
|
|
*/
|
|
if (p->break_loop) {
|
|
/*
|
|
* Yes - clear the flag that indicates that it
|
|
* has, and return PCAP_ERROR_BREAK to indicate
|
|
* that we were told to break out of the loop.
|
|
*/
|
|
p->break_loop = 0;
|
|
return (PCAP_ERROR_BREAK);
|
|
}
|
|
|
|
/*
|
|
* Capture the packets.
|
|
*
|
|
* The PACKET structure had a bunch of extra stuff for
|
|
* Windows 9x/Me, but the only interesting data in it
|
|
* in the versions of Windows that we support is just
|
|
* a copy of p->buffer, a copy of p->buflen, and the
|
|
* actual number of bytes read returned from
|
|
* PacketReceivePacket(), none of which has to be
|
|
* retained from call to call, so we just keep one on
|
|
* the stack.
|
|
*/
|
|
PacketInitPacket(&Packet, (BYTE *)p->buffer, p->bufsize);
|
|
if (!PacketReceivePacket(pw->adapter, &Packet, TRUE)) {
|
|
/*
|
|
* Did the device go away?
|
|
* If so, the error we get can either be
|
|
* ERROR_GEN_FAILURE or ERROR_DEVICE_REMOVED.
|
|
*/
|
|
DWORD errcode = GetLastError();
|
|
|
|
if (errcode == ERROR_GEN_FAILURE ||
|
|
errcode == ERROR_DEVICE_REMOVED) {
|
|
/*
|
|
* The device on which we're capturing
|
|
* went away, or it became unusable
|
|
* by NPF due to a suspend/resume.
|
|
*
|
|
* ERROR_GEN_FAILURE comes from
|
|
* STATUS_UNSUCCESSFUL, as well as some
|
|
* other NT status codes that the Npcap
|
|
* driver is unlikely to return.
|
|
* XXX - hopefully no other error
|
|
* conditions are indicated by this.
|
|
*
|
|
* ERROR_DEVICE_REMOVED comes from
|
|
* STATUS_DEVICE_REMOVED.
|
|
*
|
|
* We report the Windows status code
|
|
* name and the corresponding NT status
|
|
* code name, for the benefit of attempts
|
|
* to debug cases where this error is
|
|
* reported when the device *wasn't*
|
|
* removed, either because it's not
|
|
* removable, it's removable but wasn't
|
|
* removed, or it's a device that doesn't
|
|
* correspond to a physical device.
|
|
*
|
|
* XXX - we really should return an
|
|
* appropriate error for that, but
|
|
* pcap_dispatch() etc. aren't
|
|
* documented as having error returns
|
|
* other than PCAP_ERROR or PCAP_ERROR_BREAK.
|
|
*/
|
|
const char *errcode_msg;
|
|
|
|
if (errcode == ERROR_GEN_FAILURE)
|
|
errcode_msg = "ERROR_GEN_FAILURE/STATUS_UNSUCCESSFUL";
|
|
else
|
|
errcode_msg = "ERROR_DEVICE_REMOVED/STATUS_DEVICE_REMOVED";
|
|
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
"The interface disappeared (error code %s)",
|
|
errcode_msg);
|
|
} else {
|
|
pcap_fmt_errmsg_for_win32_err(p->errbuf,
|
|
PCAP_ERRBUF_SIZE, errcode,
|
|
"PacketReceivePacket error");
|
|
}
|
|
return (PCAP_ERROR);
|
|
}
|
|
|
|
cc = Packet.ulBytesReceived;
|
|
|
|
bp = p->buffer;
|
|
}
|
|
else
|
|
bp = p->bp;
|
|
|
|
/*
|
|
* Loop through each packet.
|
|
*
|
|
* This assumes that a single buffer of packets will have
|
|
* <= INT_MAX packets, so the packet count doesn't overflow.
|
|
*/
|
|
#define bhp ((struct bpf_hdr *)bp)
|
|
n = 0;
|
|
ep = bp + cc;
|
|
for (;;) {
|
|
register u_int caplen, hdrlen;
|
|
|
|
/*
|
|
* Has "pcap_breakloop()" been called?
|
|
* If so, return immediately - if we haven't read any
|
|
* packets, clear the flag and return PCAP_ERROR_BREAK
|
|
* to indicate that we were told to break out of the loop,
|
|
* otherwise leave the flag set, so that the *next* call
|
|
* will break out of the loop without having read any
|
|
* packets, and return the number of packets we've
|
|
* processed so far.
|
|
*/
|
|
if (p->break_loop) {
|
|
if (n == 0) {
|
|
p->break_loop = 0;
|
|
return (PCAP_ERROR_BREAK);
|
|
} else {
|
|
p->bp = bp;
|
|
p->cc = (int) (ep - bp);
|
|
return (n);
|
|
}
|
|
}
|
|
if (bp >= ep)
|
|
break;
|
|
|
|
caplen = bhp->bh_caplen;
|
|
hdrlen = bhp->bh_hdrlen;
|
|
datap = bp + hdrlen;
|
|
|
|
/*
|
|
* Short-circuit evaluation: if using BPF filter
|
|
* in kernel, no need to do it now - we already know
|
|
* the packet passed the filter.
|
|
*
|
|
* XXX - pcap_filter() should always return TRUE if
|
|
* handed a null pointer for the program, but it might
|
|
* just try to "run" the filter, so we check here.
|
|
*/
|
|
if (pw->filtering_in_kernel ||
|
|
p->fcode.bf_insns == NULL ||
|
|
pcap_filter(p->fcode.bf_insns, datap, bhp->bh_datalen, caplen)) {
|
|
#ifdef ENABLE_REMOTE
|
|
switch (p->rmt_samp.method) {
|
|
|
|
case PCAP_SAMP_1_EVERY_N:
|
|
pw->samp_npkt = (pw->samp_npkt + 1) % p->rmt_samp.value;
|
|
|
|
/* Discard all packets that are not '1 out of N' */
|
|
if (pw->samp_npkt != 0) {
|
|
bp += Packet_WORDALIGN(caplen + hdrlen);
|
|
continue;
|
|
}
|
|
break;
|
|
|
|
case PCAP_SAMP_FIRST_AFTER_N_MS:
|
|
{
|
|
struct pcap_pkthdr *pkt_header = (struct pcap_pkthdr*) bp;
|
|
|
|
/*
|
|
* Check if the timestamp of the arrived
|
|
* packet is smaller than our target time.
|
|
*/
|
|
if (pkt_header->ts.tv_sec < pw->samp_time.tv_sec ||
|
|
(pkt_header->ts.tv_sec == pw->samp_time.tv_sec && pkt_header->ts.tv_usec < pw->samp_time.tv_usec)) {
|
|
bp += Packet_WORDALIGN(caplen + hdrlen);
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* The arrived packet is suitable for being
|
|
* delivered to our caller, so let's update
|
|
* the target time.
|
|
*/
|
|
pw->samp_time.tv_usec = pkt_header->ts.tv_usec + p->rmt_samp.value * 1000;
|
|
if (pw->samp_time.tv_usec > 1000000) {
|
|
pw->samp_time.tv_sec = pkt_header->ts.tv_sec + pw->samp_time.tv_usec / 1000000;
|
|
pw->samp_time.tv_usec = pw->samp_time.tv_usec % 1000000;
|
|
}
|
|
}
|
|
}
|
|
#endif /* ENABLE_REMOTE */
|
|
|
|
/*
|
|
* XXX A bpf_hdr matches a pcap_pkthdr.
|
|
*/
|
|
(*callback)(user, (struct pcap_pkthdr*)bp, datap);
|
|
bp += Packet_WORDALIGN(caplen + hdrlen);
|
|
if (++n >= cnt && !PACKET_COUNT_IS_UNLIMITED(cnt)) {
|
|
p->bp = bp;
|
|
p->cc = (int) (ep - bp);
|
|
return (n);
|
|
}
|
|
} else {
|
|
/*
|
|
* Skip this packet.
|
|
*/
|
|
bp += Packet_WORDALIGN(caplen + hdrlen);
|
|
}
|
|
}
|
|
#undef bhp
|
|
p->cc = 0;
|
|
return (n);
|
|
}
|
|
|
|
#ifdef HAVE_DAG_API
|
|
static int
|
|
pcap_read_win32_dag(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
|
|
{
|
|
struct pcap_win *pw = p->priv;
|
|
PACKET Packet;
|
|
u_char *dp = NULL;
|
|
int packet_len = 0, caplen = 0;
|
|
struct pcap_pkthdr pcap_header;
|
|
u_char *endofbuf;
|
|
int n = 0;
|
|
dag_record_t *header;
|
|
unsigned erf_record_len;
|
|
ULONGLONG ts;
|
|
int cc;
|
|
unsigned swt;
|
|
unsigned dfp = pw->adapter->DagFastProcess;
|
|
|
|
cc = p->cc;
|
|
if (cc == 0) /* Get new packets only if we have processed all the ones of the previous read */
|
|
{
|
|
/*
|
|
* Get new packets from the network.
|
|
*
|
|
* The PACKET structure had a bunch of extra stuff for
|
|
* Windows 9x/Me, but the only interesting data in it
|
|
* in the versions of Windows that we support is just
|
|
* a copy of p->buffer, a copy of p->buflen, and the
|
|
* actual number of bytes read returned from
|
|
* PacketReceivePacket(), none of which has to be
|
|
* retained from call to call, so we just keep one on
|
|
* the stack.
|
|
*/
|
|
PacketInitPacket(&Packet, (BYTE *)p->buffer, p->bufsize);
|
|
if (!PacketReceivePacket(pw->adapter, &Packet, TRUE)) {
|
|
snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "read error: PacketReceivePacket failed");
|
|
return (-1);
|
|
}
|
|
|
|
cc = Packet.ulBytesReceived;
|
|
if(cc == 0)
|
|
/* The timeout has expired but we no packets arrived */
|
|
return (0);
|
|
header = (dag_record_t*)pw->adapter->DagBuffer;
|
|
}
|
|
else
|
|
header = (dag_record_t*)p->bp;
|
|
|
|
endofbuf = (char*)header + cc;
|
|
|
|
/*
|
|
* This can conceivably process more than INT_MAX packets,
|
|
* which would overflow the packet count, causing it either
|
|
* to look like a negative number, and thus cause us to
|
|
* return a value that looks like an error, or overflow
|
|
* back into positive territory, and thus cause us to
|
|
* return a too-low count.
|
|
*
|
|
* Therefore, if the packet count is unlimited, we clip
|
|
* it at INT_MAX; this routine is not expected to
|
|
* process packets indefinitely, so that's not an issue.
|
|
*/
|
|
if (PACKET_COUNT_IS_UNLIMITED(cnt))
|
|
cnt = INT_MAX;
|
|
|
|
/*
|
|
* Cycle through the packets
|
|
*/
|
|
do
|
|
{
|
|
erf_record_len = SWAPS(header->rlen);
|
|
if((char*)header + erf_record_len > endofbuf)
|
|
break;
|
|
|
|
/* Increase the number of captured packets */
|
|
p->stat.ps_recv++;
|
|
|
|
/* Find the beginning of the packet */
|
|
dp = ((u_char *)header) + dag_record_size;
|
|
|
|
/* Determine actual packet len */
|
|
switch(header->type)
|
|
{
|
|
case TYPE_ATM:
|
|
packet_len = ATM_SNAPLEN;
|
|
caplen = ATM_SNAPLEN;
|
|
dp += 4;
|
|
|
|
break;
|
|
|
|
case TYPE_ETH:
|
|
swt = SWAPS(header->wlen);
|
|
packet_len = swt - (pw->dag_fcs_bits);
|
|
caplen = erf_record_len - dag_record_size - 2;
|
|
if (caplen > packet_len)
|
|
{
|
|
caplen = packet_len;
|
|
}
|
|
dp += 2;
|
|
|
|
break;
|
|
|
|
case TYPE_HDLC_POS:
|
|
swt = SWAPS(header->wlen);
|
|
packet_len = swt - (pw->dag_fcs_bits);
|
|
caplen = erf_record_len - dag_record_size;
|
|
if (caplen > packet_len)
|
|
{
|
|
caplen = packet_len;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
if(caplen > p->snapshot)
|
|
caplen = p->snapshot;
|
|
|
|
/*
|
|
* Has "pcap_breakloop()" been called?
|
|
* If so, return immediately - if we haven't read any
|
|
* packets, clear the flag and return -2 to indicate
|
|
* that we were told to break out of the loop, otherwise
|
|
* leave the flag set, so that the *next* call will break
|
|
* out of the loop without having read any packets, and
|
|
* return the number of packets we've processed so far.
|
|
*/
|
|
if (p->break_loop)
|
|
{
|
|
if (n == 0)
|
|
{
|
|
p->break_loop = 0;
|
|
return (-2);
|
|
}
|
|
else
|
|
{
|
|
p->bp = (char*)header;
|
|
p->cc = endofbuf - (char*)header;
|
|
return (n);
|
|
}
|
|
}
|
|
|
|
if(!dfp)
|
|
{
|
|
/* convert between timestamp formats */
|
|
ts = header->ts;
|
|
pcap_header.ts.tv_sec = (int)(ts >> 32);
|
|
ts = (ts & 0xffffffffi64) * 1000000;
|
|
ts += 0x80000000; /* rounding */
|
|
pcap_header.ts.tv_usec = (int)(ts >> 32);
|
|
if (pcap_header.ts.tv_usec >= 1000000) {
|
|
pcap_header.ts.tv_usec -= 1000000;
|
|
pcap_header.ts.tv_sec++;
|
|
}
|
|
}
|
|
|
|
/* No underlying filtering system. We need to filter on our own */
|
|
if (p->fcode.bf_insns)
|
|
{
|
|
if (pcap_filter(p->fcode.bf_insns, dp, packet_len, caplen) == 0)
|
|
{
|
|
/* Move to next packet */
|
|
header = (dag_record_t*)((char*)header + erf_record_len);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/* Fill the header for the user supplied callback function */
|
|
pcap_header.caplen = caplen;
|
|
pcap_header.len = packet_len;
|
|
|
|
/* Call the callback function */
|
|
(*callback)(user, &pcap_header, dp);
|
|
|
|
/* Move to next packet */
|
|
header = (dag_record_t*)((char*)header + erf_record_len);
|
|
|
|
/* Stop if the number of packets requested by user has been reached*/
|
|
if (++n >= cnt && !PACKET_COUNT_IS_UNLIMITED(cnt))
|
|
{
|
|
p->bp = (char*)header;
|
|
p->cc = endofbuf - (char*)header;
|
|
return (n);
|
|
}
|
|
}
|
|
while((u_char*)header < endofbuf);
|
|
|
|
return (1);
|
|
}
|
|
#endif /* HAVE_DAG_API */
|
|
|
|
/* Send a packet to the network */
|
|
static int
|
|
pcap_inject_npf(pcap_t *p, const void *buf, int size)
|
|
{
|
|
struct pcap_win *pw = p->priv;
|
|
PACKET pkt;
|
|
|
|
PacketInitPacket(&pkt, (PVOID)buf, size);
|
|
if(PacketSendPacket(pw->adapter,&pkt,TRUE) == FALSE) {
|
|
pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
GetLastError(), "send error: PacketSendPacket failed");
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* We assume it all got sent if "PacketSendPacket()" succeeded.
|
|
* "pcap_inject()" is expected to return the number of bytes
|
|
* sent.
|
|
*/
|
|
return (size);
|
|
}
|
|
|
|
static void
|
|
pcap_cleanup_npf(pcap_t *p)
|
|
{
|
|
struct pcap_win *pw = p->priv;
|
|
|
|
if (pw->adapter != NULL) {
|
|
PacketCloseAdapter(pw->adapter);
|
|
pw->adapter = NULL;
|
|
}
|
|
if (pw->rfmon_selfstart)
|
|
{
|
|
PacketSetMonitorMode(p->opt.device, 0);
|
|
}
|
|
pcap_cleanup_live_common(p);
|
|
}
|
|
|
|
static void
|
|
pcap_breakloop_npf(pcap_t *p)
|
|
{
|
|
pcap_breakloop_common(p);
|
|
struct pcap_win *pw = p->priv;
|
|
|
|
/* XXX - what if this fails? */
|
|
SetEvent(PacketGetReadEvent(pw->adapter));
|
|
}
|
|
|
|
/*
|
|
* These are NTSTATUS values:
|
|
*
|
|
* https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-erref/87fba13e-bf06-450e-83b1-9241dc81e781
|
|
*
|
|
* with the "Customer" bit set. If a driver returns them, they are not
|
|
* mapped to Windows error values in userland; they're returned by
|
|
* GetLastError().
|
|
*
|
|
* Note that "driver" here includes the Npcap NPF driver, as various
|
|
* versions would take NT status values and set the "Customer" bit
|
|
* before returning the status code. The commit message for the
|
|
* change that started doing that is
|
|
*
|
|
* Returned a customer-defined NTSTATUS in OID requests to avoid
|
|
* NTSTATUS-to-Win32 Error code translation.
|
|
*
|
|
* but I don't know why the goal was to avoid that translation.
|
|
*
|
|
* Attempting to set the hardware filter on a Microsoft Surface Pro's
|
|
* Mobile Broadband Adapter returns an error that appears to be
|
|
* NDIS_STATUS_NOT_SUPPORTED ORed with the "Customer" bit, so it's
|
|
* probably indicating that it doesn't support that.
|
|
*
|
|
* It is likely that there are other devices which throw spurious errors,
|
|
* at which point this will need refactoring to efficiently check against
|
|
* a list, but for now we can just check this one value. Perhaps the
|
|
* right way to do this is compare against various NDIS errors with
|
|
* the "customer" bit ORed in.
|
|
*/
|
|
#define NT_STATUS_CUSTOMER_DEFINED 0x20000000
|
|
|
|
static int
|
|
pcap_activate_npf(pcap_t *p)
|
|
{
|
|
struct pcap_win *pw = p->priv;
|
|
NetType type;
|
|
int res;
|
|
int status = 0;
|
|
struct bpf_insn total_insn;
|
|
struct bpf_program total_prog;
|
|
|
|
if (p->opt.rfmon) {
|
|
/*
|
|
* Monitor mode is supported on Windows Vista and later.
|
|
*/
|
|
if (PacketGetMonitorMode(p->opt.device) == 1)
|
|
{
|
|
pw->rfmon_selfstart = 0;
|
|
}
|
|
else
|
|
{
|
|
if ((res = PacketSetMonitorMode(p->opt.device, 1)) != 1)
|
|
{
|
|
pw->rfmon_selfstart = 0;
|
|
// Monitor mode is not supported.
|
|
if (res == 0)
|
|
{
|
|
return PCAP_ERROR_RFMON_NOTSUP;
|
|
}
|
|
else
|
|
{
|
|
return PCAP_ERROR;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
pw->rfmon_selfstart = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Init Winsock if it hasn't already been initialized */
|
|
pcap_wsockinit();
|
|
|
|
pw->adapter = PacketOpenAdapter(p->opt.device);
|
|
|
|
if (pw->adapter == NULL)
|
|
{
|
|
DWORD errcode = GetLastError();
|
|
|
|
/*
|
|
* What error did we get when trying to open the adapter?
|
|
*/
|
|
switch (errcode) {
|
|
|
|
case ERROR_BAD_UNIT:
|
|
/*
|
|
* There's no such device.
|
|
* There's nothing to add, so clear the error
|
|
* message.
|
|
*/
|
|
p->errbuf[0] = '\0';
|
|
return (PCAP_ERROR_NO_SUCH_DEVICE);
|
|
|
|
case ERROR_ACCESS_DENIED:
|
|
/*
|
|
* There is, but we don't have permission to
|
|
* use it.
|
|
*
|
|
* XXX - we currently get ERROR_BAD_UNIT if the
|
|
* user says "no" to the UAC prompt.
|
|
*/
|
|
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
"The helper program for \"Admin-only Mode\" must be allowed to make changes to your device");
|
|
return (PCAP_ERROR_PERM_DENIED);
|
|
|
|
default:
|
|
/*
|
|
* Unknown - report details.
|
|
*/
|
|
pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
errcode, "Error opening adapter");
|
|
if (pw->rfmon_selfstart)
|
|
{
|
|
PacketSetMonitorMode(p->opt.device, 0);
|
|
}
|
|
return (PCAP_ERROR);
|
|
}
|
|
}
|
|
|
|
/*get network type*/
|
|
if(PacketGetNetType (pw->adapter,&type) == FALSE)
|
|
{
|
|
pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
GetLastError(), "Cannot determine the network type");
|
|
goto bad;
|
|
}
|
|
|
|
/*Set the linktype*/
|
|
switch (type.LinkType)
|
|
{
|
|
/*
|
|
* NDIS-defined medium types.
|
|
*/
|
|
case NdisMedium802_3:
|
|
p->linktype = DLT_EN10MB;
|
|
/*
|
|
* This is (presumably) a real Ethernet capture; give it a
|
|
* link-layer-type list with DLT_EN10MB and DLT_DOCSIS, so
|
|
* that an application can let you choose it, in case you're
|
|
* capturing DOCSIS traffic that a Cisco Cable Modem
|
|
* Termination System is putting out onto an Ethernet (it
|
|
* doesn't put an Ethernet header onto the wire, it puts raw
|
|
* DOCSIS frames out on the wire inside the low-level
|
|
* Ethernet framing).
|
|
*/
|
|
p->dlt_list = (u_int *) malloc(sizeof(u_int) * 2);
|
|
/*
|
|
* If that fails, just leave the list empty.
|
|
*/
|
|
if (p->dlt_list != NULL) {
|
|
p->dlt_list[0] = DLT_EN10MB;
|
|
p->dlt_list[1] = DLT_DOCSIS;
|
|
p->dlt_count = 2;
|
|
}
|
|
break;
|
|
|
|
case NdisMedium802_5:
|
|
/*
|
|
* Token Ring.
|
|
*/
|
|
p->linktype = DLT_IEEE802;
|
|
break;
|
|
|
|
case NdisMediumFddi:
|
|
p->linktype = DLT_FDDI;
|
|
break;
|
|
|
|
case NdisMediumWan:
|
|
p->linktype = DLT_EN10MB;
|
|
break;
|
|
|
|
case NdisMediumArcnetRaw:
|
|
p->linktype = DLT_ARCNET;
|
|
break;
|
|
|
|
case NdisMediumArcnet878_2:
|
|
p->linktype = DLT_ARCNET;
|
|
break;
|
|
|
|
case NdisMediumAtm:
|
|
p->linktype = DLT_ATM_RFC1483;
|
|
break;
|
|
|
|
case NdisMediumWirelessWan:
|
|
p->linktype = DLT_RAW;
|
|
break;
|
|
|
|
case NdisMediumIP:
|
|
p->linktype = DLT_RAW;
|
|
break;
|
|
|
|
/*
|
|
* Npcap-defined medium types.
|
|
*/
|
|
case NdisMediumNull:
|
|
p->linktype = DLT_NULL;
|
|
break;
|
|
|
|
case NdisMediumCHDLC:
|
|
p->linktype = DLT_CHDLC;
|
|
break;
|
|
|
|
case NdisMediumPPPSerial:
|
|
p->linktype = DLT_PPP_SERIAL;
|
|
break;
|
|
|
|
case NdisMediumBare80211:
|
|
p->linktype = DLT_IEEE802_11;
|
|
break;
|
|
|
|
case NdisMediumRadio80211:
|
|
p->linktype = DLT_IEEE802_11_RADIO;
|
|
break;
|
|
|
|
case NdisMediumPpi:
|
|
p->linktype = DLT_PPI;
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* An unknown medium type is assumed to supply Ethernet
|
|
* headers; if not, the user will have to report it,
|
|
* so that the medium type and link-layer header type
|
|
* can be determined. If we were to fail here, we
|
|
* might get the link-layer type in the error, but
|
|
* the user wouldn't get a capture, so we wouldn't
|
|
* be able to determine the link-layer type; we report
|
|
* a warning with the link-layer type, so at least
|
|
* some programs will report the warning.
|
|
*/
|
|
p->linktype = DLT_EN10MB;
|
|
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
"Unknown NdisMedium value %d, defaulting to DLT_EN10MB",
|
|
type.LinkType);
|
|
status = PCAP_WARNING;
|
|
break;
|
|
}
|
|
|
|
#ifdef HAVE_PACKET_GET_TIMESTAMP_MODES
|
|
/*
|
|
* Set the timestamp type.
|
|
* (Yes, we require PacketGetTimestampModes(), not just
|
|
* PacketSetTimestampMode(). If we have the former, we
|
|
* have the latter, unless somebody's using a version
|
|
* of Npcap that they've hacked to provide the former
|
|
* but not the latter; if they've done that, either
|
|
* they're confused or they're trolling us.)
|
|
*/
|
|
switch (p->opt.tstamp_type) {
|
|
|
|
case PCAP_TSTAMP_HOST_HIPREC_UNSYNCED:
|
|
/*
|
|
* Better than low-res, but *not* synchronized with
|
|
* the OS clock.
|
|
*/
|
|
if (!PacketSetTimestampMode(pw->adapter, TIMESTAMPMODE_SINGLE_SYNCHRONIZATION))
|
|
{
|
|
pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
GetLastError(), "Cannot set the time stamp mode to TIMESTAMPMODE_SINGLE_SYNCHRONIZATION");
|
|
goto bad;
|
|
}
|
|
break;
|
|
|
|
case PCAP_TSTAMP_HOST_LOWPREC:
|
|
/*
|
|
* Low-res, but synchronized with the OS clock.
|
|
*/
|
|
if (!PacketSetTimestampMode(pw->adapter, TIMESTAMPMODE_QUERYSYSTEMTIME))
|
|
{
|
|
pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
GetLastError(), "Cannot set the time stamp mode to TIMESTAMPMODE_QUERYSYSTEMTIME");
|
|
goto bad;
|
|
}
|
|
break;
|
|
|
|
case PCAP_TSTAMP_HOST_HIPREC:
|
|
/*
|
|
* High-res, and synchronized with the OS clock.
|
|
*/
|
|
if (!PacketSetTimestampMode(pw->adapter, TIMESTAMPMODE_QUERYSYSTEMTIME_PRECISE))
|
|
{
|
|
pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
GetLastError(), "Cannot set the time stamp mode to TIMESTAMPMODE_QUERYSYSTEMTIME_PRECISE");
|
|
goto bad;
|
|
}
|
|
break;
|
|
|
|
case PCAP_TSTAMP_HOST:
|
|
/*
|
|
* XXX - do whatever the default is, for now.
|
|
* Set to the highest resolution that's synchronized
|
|
* with the system clock?
|
|
*/
|
|
break;
|
|
}
|
|
#endif /* HAVE_PACKET_GET_TIMESTAMP_MODES */
|
|
|
|
/*
|
|
* Turn a negative snapshot value (invalid), a snapshot value of
|
|
* 0 (unspecified), or a value bigger than the normal maximum
|
|
* value, into the maximum allowed value.
|
|
*
|
|
* If some application really *needs* a bigger snapshot
|
|
* length, we should just increase MAXIMUM_SNAPLEN.
|
|
*/
|
|
if (p->snapshot <= 0 || p->snapshot > MAXIMUM_SNAPLEN)
|
|
p->snapshot = MAXIMUM_SNAPLEN;
|
|
|
|
/* Set promiscuous mode */
|
|
if (p->opt.promisc)
|
|
{
|
|
|
|
if (PacketSetHwFilter(pw->adapter,NDIS_PACKET_TYPE_PROMISCUOUS) == FALSE)
|
|
{
|
|
DWORD errcode = GetLastError();
|
|
|
|
/*
|
|
* Suppress spurious error generated by non-compiant
|
|
* MS Surface mobile adapters that appear to
|
|
* return NDIS_STATUS_NOT_SUPPORTED for attempts
|
|
* to set the hardware filter.
|
|
*
|
|
* It appears to be reporting NDIS_STATUS_NOT_SUPPORTED,
|
|
* but with the NT status value "Customer" bit set;
|
|
* the Npcap NPF driver sets that bit in some cases.
|
|
*
|
|
* If we knew that this meant "promiscuous mode
|
|
* isn't supported", we could add a "promiscuous
|
|
* mode isn't supported" error code and return
|
|
* that, but:
|
|
*
|
|
* 1) we don't know that it means that
|
|
* rather than meaning "we reject attempts
|
|
* to set the filter, even though the NDIS
|
|
* specifications say you shouldn't do that"
|
|
*
|
|
* and
|
|
*
|
|
* 2) other interface types that don't
|
|
* support promiscuous mode, at least
|
|
* on UN*Xes, just silently ignore
|
|
* attempts to set promiscuous mode
|
|
*
|
|
* and rejecting it with an error could disrupt
|
|
* attempts to capture, as many programs (tcpdump,
|
|
* *shark) default to promiscuous mode.
|
|
*
|
|
* Alternatively, we could return the "promiscuous
|
|
* mode not supported" *warning* value, so that
|
|
* correct code will either ignore it or report
|
|
* it and continue capturing. (This may require
|
|
* a pcap_init() flag to request that return
|
|
* value, so that old incorrect programs that
|
|
* assume a non-zero return from pcap_activate()
|
|
* is an error don't break.)
|
|
*/
|
|
if (errcode != (NDIS_STATUS_NOT_SUPPORTED|NT_STATUS_CUSTOMER_DEFINED))
|
|
{
|
|
pcap_fmt_errmsg_for_win32_err(p->errbuf,
|
|
PCAP_ERRBUF_SIZE, errcode,
|
|
"failed to set hardware filter to promiscuous mode");
|
|
goto bad;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* NDIS_PACKET_TYPE_ALL_LOCAL selects "All packets sent by
|
|
* installed protocols and all packets indicated by the NIC",
|
|
* but if no protocol drivers (like TCP/IP) are installed,
|
|
* NDIS_PACKET_TYPE_DIRECTED, NDIS_PACKET_TYPE_BROADCAST,
|
|
* and NDIS_PACKET_TYPE_MULTICAST are needed to capture
|
|
* incoming frames.
|
|
*/
|
|
if (PacketSetHwFilter(pw->adapter,
|
|
NDIS_PACKET_TYPE_ALL_LOCAL |
|
|
NDIS_PACKET_TYPE_DIRECTED |
|
|
NDIS_PACKET_TYPE_BROADCAST |
|
|
NDIS_PACKET_TYPE_MULTICAST) == FALSE)
|
|
{
|
|
DWORD errcode = GetLastError();
|
|
|
|
/*
|
|
* Suppress spurious error generated by non-compiant
|
|
* MS Surface mobile adapters.
|
|
*/
|
|
if (errcode != (NDIS_STATUS_NOT_SUPPORTED|NT_STATUS_CUSTOMER_DEFINED))
|
|
{
|
|
pcap_fmt_errmsg_for_win32_err(p->errbuf,
|
|
PCAP_ERRBUF_SIZE, errcode,
|
|
"failed to set hardware filter to non-promiscuous mode");
|
|
goto bad;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Set the buffer size */
|
|
p->bufsize = WIN32_DEFAULT_USER_BUFFER_SIZE;
|
|
|
|
if(!(pw->adapter->Flags & INFO_FLAG_DAG_CARD))
|
|
{
|
|
/*
|
|
* Traditional Adapter
|
|
*/
|
|
/*
|
|
* If the buffer size wasn't explicitly set, default to
|
|
* WIN32_DEFAULT_KERNEL_BUFFER_SIZE.
|
|
*/
|
|
if (p->opt.buffer_size == 0)
|
|
p->opt.buffer_size = WIN32_DEFAULT_KERNEL_BUFFER_SIZE;
|
|
|
|
if(PacketSetBuff(pw->adapter,p->opt.buffer_size)==FALSE)
|
|
{
|
|
snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "driver error: not enough memory to allocate the kernel buffer");
|
|
goto bad;
|
|
}
|
|
|
|
p->buffer = malloc(p->bufsize);
|
|
if (p->buffer == NULL)
|
|
{
|
|
pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
errno, "malloc");
|
|
goto bad;
|
|
}
|
|
|
|
if (p->opt.immediate)
|
|
{
|
|
/* tell the driver to copy the buffer as soon as data arrives */
|
|
if(PacketSetMinToCopy(pw->adapter,0)==FALSE)
|
|
{
|
|
pcap_fmt_errmsg_for_win32_err(p->errbuf,
|
|
PCAP_ERRBUF_SIZE, GetLastError(),
|
|
"Error calling PacketSetMinToCopy");
|
|
goto bad;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* tell the driver to copy the buffer only if it contains at least 16K */
|
|
if(PacketSetMinToCopy(pw->adapter,16000)==FALSE)
|
|
{
|
|
pcap_fmt_errmsg_for_win32_err(p->errbuf,
|
|
PCAP_ERRBUF_SIZE, GetLastError(),
|
|
"Error calling PacketSetMinToCopy");
|
|
goto bad;
|
|
}
|
|
}
|
|
} else {
|
|
/*
|
|
* Dag Card
|
|
*/
|
|
#ifdef HAVE_DAG_API
|
|
/*
|
|
* We have DAG support.
|
|
*/
|
|
LONG status;
|
|
HKEY dagkey;
|
|
DWORD lptype;
|
|
DWORD lpcbdata;
|
|
int postype = 0;
|
|
char keyname[512];
|
|
|
|
snprintf(keyname, sizeof(keyname), "%s\\CardParams\\%s",
|
|
"SYSTEM\\CurrentControlSet\\Services\\DAG",
|
|
strstr(_strlwr(p->opt.device), "dag"));
|
|
do
|
|
{
|
|
status = RegOpenKeyEx(HKEY_LOCAL_MACHINE, keyname, 0, KEY_READ, &dagkey);
|
|
if(status != ERROR_SUCCESS)
|
|
break;
|
|
|
|
status = RegQueryValueEx(dagkey,
|
|
"PosType",
|
|
NULL,
|
|
&lptype,
|
|
(char*)&postype,
|
|
&lpcbdata);
|
|
|
|
if(status != ERROR_SUCCESS)
|
|
{
|
|
postype = 0;
|
|
}
|
|
|
|
RegCloseKey(dagkey);
|
|
}
|
|
while(FALSE);
|
|
|
|
|
|
p->snapshot = PacketSetSnapLen(pw->adapter, p->snapshot);
|
|
|
|
/* Set the length of the FCS associated to any packet. This value
|
|
* will be subtracted to the packet length */
|
|
pw->dag_fcs_bits = pw->adapter->DagFcsLen;
|
|
#else /* HAVE_DAG_API */
|
|
/*
|
|
* No DAG support.
|
|
*/
|
|
goto bad;
|
|
#endif /* HAVE_DAG_API */
|
|
}
|
|
|
|
/*
|
|
* If there's no filter program installed, there's
|
|
* no indication to the kernel of what the snapshot
|
|
* length should be, so no snapshotting is done.
|
|
*
|
|
* Therefore, when we open the device, we install
|
|
* an "accept everything" filter with the specified
|
|
* snapshot length.
|
|
*/
|
|
total_insn.code = (u_short)(BPF_RET | BPF_K);
|
|
total_insn.jt = 0;
|
|
total_insn.jf = 0;
|
|
total_insn.k = p->snapshot;
|
|
|
|
total_prog.bf_len = 1;
|
|
total_prog.bf_insns = &total_insn;
|
|
if (!PacketSetBpf(pw->adapter, &total_prog)) {
|
|
pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
GetLastError(), "PacketSetBpf");
|
|
status = PCAP_ERROR;
|
|
goto bad;
|
|
}
|
|
|
|
PacketSetReadTimeout(pw->adapter, p->opt.timeout);
|
|
|
|
/* disable loopback capture if requested */
|
|
if (p->opt.nocapture_local)
|
|
{
|
|
if (!PacketSetLoopbackBehavior(pw->adapter, NPF_DISABLE_LOOPBACK))
|
|
{
|
|
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
"Unable to disable the capture of loopback packets.");
|
|
goto bad;
|
|
}
|
|
}
|
|
|
|
#ifdef HAVE_DAG_API
|
|
if(pw->adapter->Flags & INFO_FLAG_DAG_CARD)
|
|
{
|
|
/* install dag specific handlers for read and setfilter */
|
|
p->read_op = pcap_read_win32_dag;
|
|
p->setfilter_op = pcap_setfilter_win32_dag;
|
|
}
|
|
else
|
|
{
|
|
#endif /* HAVE_DAG_API */
|
|
/* install traditional npf handlers for read and setfilter */
|
|
p->read_op = pcap_read_npf;
|
|
p->setfilter_op = pcap_setfilter_npf;
|
|
#ifdef HAVE_DAG_API
|
|
}
|
|
#endif /* HAVE_DAG_API */
|
|
p->setdirection_op = NULL; /* Not implemented. */
|
|
/* XXX - can this be implemented on some versions of Windows? */
|
|
p->inject_op = pcap_inject_npf;
|
|
p->set_datalink_op = NULL; /* can't change data link type */
|
|
p->getnonblock_op = pcap_getnonblock_npf;
|
|
p->setnonblock_op = pcap_setnonblock_npf;
|
|
p->stats_op = pcap_stats_npf;
|
|
p->breakloop_op = pcap_breakloop_npf;
|
|
p->stats_ex_op = pcap_stats_ex_npf;
|
|
p->setbuff_op = pcap_setbuff_npf;
|
|
p->setmode_op = pcap_setmode_npf;
|
|
p->setmintocopy_op = pcap_setmintocopy_npf;
|
|
p->getevent_op = pcap_getevent_npf;
|
|
p->oid_get_request_op = pcap_oid_get_request_npf;
|
|
p->oid_set_request_op = pcap_oid_set_request_npf;
|
|
p->sendqueue_transmit_op = pcap_sendqueue_transmit_npf;
|
|
p->setuserbuffer_op = pcap_setuserbuffer_npf;
|
|
p->live_dump_op = pcap_live_dump_npf;
|
|
p->live_dump_ended_op = pcap_live_dump_ended_npf;
|
|
p->get_airpcap_handle_op = pcap_get_airpcap_handle_npf;
|
|
p->cleanup_op = pcap_cleanup_npf;
|
|
|
|
/*
|
|
* XXX - this is only done because WinPcap supported
|
|
* pcap_fileno() returning the hFile HANDLE from the
|
|
* ADAPTER structure. We make no general guarantees
|
|
* that the caller can do anything useful with it.
|
|
*
|
|
* (Not that we make any general guarantee of that
|
|
* sort on UN*X, either, any more, given that not
|
|
* all capture devices are regular OS network
|
|
* interfaces.)
|
|
*/
|
|
p->handle = pw->adapter->hFile;
|
|
|
|
return (status);
|
|
bad:
|
|
pcap_cleanup_npf(p);
|
|
return (PCAP_ERROR);
|
|
}
|
|
|
|
/*
|
|
* Check if rfmon mode is supported on the pcap_t for Windows systems.
|
|
*/
|
|
static int
|
|
pcap_can_set_rfmon_npf(pcap_t *p)
|
|
{
|
|
return (PacketIsMonitorModeSupported(p->opt.device) == 1);
|
|
}
|
|
|
|
/*
|
|
* Get a list of time stamp types.
|
|
*/
|
|
#ifdef HAVE_PACKET_GET_TIMESTAMP_MODES
|
|
static int
|
|
get_ts_types(const char *device, pcap_t *p, char *ebuf)
|
|
{
|
|
char *device_copy = NULL;
|
|
ADAPTER *adapter = NULL;
|
|
ULONG num_ts_modes;
|
|
BOOL ret;
|
|
DWORD error = ERROR_SUCCESS;
|
|
ULONG *modes = NULL;
|
|
int status = 0;
|
|
|
|
do {
|
|
/*
|
|
* First, find out how many time stamp modes we have.
|
|
* To do that, we have to open the adapter.
|
|
*
|
|
* XXX - PacketOpenAdapter() takes a non-const pointer
|
|
* as an argument, so we make a copy of the argument and
|
|
* pass that to it.
|
|
*/
|
|
device_copy = strdup(device);
|
|
if (device_copy == NULL) {
|
|
pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE, errno, "malloc");
|
|
status = -1;
|
|
break;
|
|
}
|
|
|
|
adapter = PacketOpenAdapter(device_copy);
|
|
if (adapter == NULL)
|
|
{
|
|
error = GetLastError();
|
|
/*
|
|
* If we can't open the device now, we won't be
|
|
* able to later, either.
|
|
*
|
|
* If the error is something that indicates
|
|
* that the device doesn't exist, or that they
|
|
* don't have permission to open the device - or
|
|
* perhaps that they don't have permission to get
|
|
* a list of devices, if PacketOpenAdapter() does
|
|
* that - the user will find that out when they try
|
|
* to activate the device; just return an empty
|
|
* list of time stamp types.
|
|
*
|
|
* Treating either of those as errors will, for
|
|
* example, cause "tcpdump -i <number>" to fail,
|
|
* because it first tries to pass the interface
|
|
* name to pcap_create() and pcap_activate(),
|
|
* in order to handle OSes where interfaces can
|
|
* have names that are just numbers (stand up
|
|
* and say hello, Linux!), and, if pcap_activate()
|
|
* fails with a "no such device" error, checks
|
|
* whether the interface name is a valid number
|
|
* and, if so, tries to use it as an index in
|
|
* the list of interfaces.
|
|
*
|
|
* That means pcap_create() must succeed even
|
|
* for interfaces that don't exist, with the
|
|
* failure occurring at pcap_activate() time.
|
|
*/
|
|
if (error == ERROR_BAD_UNIT ||
|
|
error == ERROR_ACCESS_DENIED) {
|
|
p->tstamp_type_count = 0;
|
|
p->tstamp_type_list = NULL;
|
|
status = 0;
|
|
} else {
|
|
pcap_fmt_errmsg_for_win32_err(ebuf,
|
|
PCAP_ERRBUF_SIZE, error,
|
|
"Error opening adapter");
|
|
status = -1;
|
|
}
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Get the total number of time stamp modes.
|
|
*
|
|
* The buffer for PacketGetTimestampModes() is
|
|
* a sequence of 1 or more ULONGs. What's
|
|
* passed to PacketGetTimestampModes() should have
|
|
* the total number of ULONGs in the first ULONG;
|
|
* what's returned *from* PacketGetTimestampModes()
|
|
* has the total number of time stamp modes in
|
|
* the first ULONG.
|
|
*
|
|
* Yes, that means if there are N time stamp
|
|
* modes, the first ULONG should be set to N+1
|
|
* on input, and will be set to N on output.
|
|
*
|
|
* We first make a call to PacketGetTimestampModes()
|
|
* with a pointer to a single ULONG set to 1; the
|
|
* call should fail with ERROR_MORE_DATA (unless
|
|
* there are *no* modes, but that should never
|
|
* happen), and that ULONG should be set to the
|
|
* number of modes.
|
|
*/
|
|
num_ts_modes = 1;
|
|
ret = PacketGetTimestampModes(adapter, &num_ts_modes);
|
|
if (!ret) {
|
|
/*
|
|
* OK, it failed. Did it fail with
|
|
* ERROR_MORE_DATA?
|
|
*/
|
|
error = GetLastError();
|
|
if (error != ERROR_MORE_DATA) {
|
|
/*
|
|
* No, did it fail with ERROR_INVALID_FUNCTION?
|
|
*/
|
|
if (error == ERROR_INVALID_FUNCTION) {
|
|
/*
|
|
* This is probably due to
|
|
* the driver with which Packet.dll
|
|
* communicates being older, or
|
|
* being a WinPcap driver, so
|
|
* that it doesn't support
|
|
* BIOCGTIMESTAMPMODES.
|
|
*
|
|
* Tell the user to try uninstalling
|
|
* Npcap - and WinPcap if installed -
|
|
* and re-installing it, to flush
|
|
* out all older drivers.
|
|
*/
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE,
|
|
"PacketGetTimestampModes() failed with ERROR_INVALID_FUNCTION; try uninstalling Npcap, and WinPcap if installed, and re-installing it from npcap.com");
|
|
status = -1;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* No, some other error. Fail.
|
|
*/
|
|
pcap_fmt_errmsg_for_win32_err(ebuf,
|
|
PCAP_ERRBUF_SIZE, error,
|
|
"Error calling PacketGetTimestampModes");
|
|
status = -1;
|
|
break;
|
|
}
|
|
}
|
|
/* else (ret == TRUE)
|
|
* Unexpected success. Let's act like we got ERROR_MORE_DATA.
|
|
* If it doesn't work, we'll hit some other error condition farther on.
|
|
*/
|
|
|
|
/* If the driver reports no modes supported *and*
|
|
* ERROR_MORE_DATA, something is seriously wrong.
|
|
* We *could* ignore the error and continue without supporting
|
|
* settable timestamp modes, but that would hide a bug.
|
|
*/
|
|
if (num_ts_modes == 0) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE,
|
|
"PacketGetTimestampModes() reports 0 modes supported.");
|
|
status = -1;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Yes, so we now know how many types to fetch.
|
|
*
|
|
* The buffer needs to have one ULONG for the
|
|
* count and num_ts_modes ULONGs for the
|
|
* num_ts_modes time stamp types.
|
|
*/
|
|
modes = (ULONG *)malloc((1 + num_ts_modes) * sizeof(ULONG));
|
|
if (modes == NULL) {
|
|
/* Out of memory. */
|
|
pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE, errno, "malloc");
|
|
status = -1;
|
|
break;
|
|
}
|
|
modes[0] = 1 + num_ts_modes;
|
|
if (!PacketGetTimestampModes(adapter, modes)) {
|
|
pcap_fmt_errmsg_for_win32_err(ebuf,
|
|
PCAP_ERRBUF_SIZE, GetLastError(),
|
|
"Error calling PacketGetTimestampModes");
|
|
status = -1;
|
|
break;
|
|
}
|
|
if (modes[0] != num_ts_modes) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE,
|
|
"First PacketGetTimestampModes() call gives %lu modes, second call gives %lu modes",
|
|
num_ts_modes, modes[0]);
|
|
status = -1;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Allocate a buffer big enough for
|
|
* PCAP_TSTAMP_HOST (default) plus
|
|
* the explicitly specified modes.
|
|
*/
|
|
p->tstamp_type_list = malloc((1 + num_ts_modes) * sizeof(u_int));
|
|
if (p->tstamp_type_list == NULL) {
|
|
pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE, errno, "malloc");
|
|
status = -1;
|
|
break;
|
|
}
|
|
u_int num_ts_types = 0;
|
|
p->tstamp_type_list[num_ts_types] =
|
|
PCAP_TSTAMP_HOST;
|
|
num_ts_types++;
|
|
for (ULONG i = 0; i < num_ts_modes; i++) {
|
|
switch (modes[i + 1]) {
|
|
|
|
case TIMESTAMPMODE_SINGLE_SYNCHRONIZATION:
|
|
/*
|
|
* Better than low-res,
|
|
* but *not* synchronized
|
|
* with the OS clock.
|
|
*/
|
|
p->tstamp_type_list[num_ts_types] =
|
|
PCAP_TSTAMP_HOST_HIPREC_UNSYNCED;
|
|
num_ts_types++;
|
|
break;
|
|
|
|
case TIMESTAMPMODE_QUERYSYSTEMTIME:
|
|
/*
|
|
* Low-res, but synchronized
|
|
* with the OS clock.
|
|
*/
|
|
p->tstamp_type_list[num_ts_types] =
|
|
PCAP_TSTAMP_HOST_LOWPREC;
|
|
num_ts_types++;
|
|
break;
|
|
|
|
case TIMESTAMPMODE_QUERYSYSTEMTIME_PRECISE:
|
|
/*
|
|
* High-res, and synchronized
|
|
* with the OS clock.
|
|
*/
|
|
p->tstamp_type_list[num_ts_types] =
|
|
PCAP_TSTAMP_HOST_HIPREC;
|
|
num_ts_types++;
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* Unknown, so we can't
|
|
* report it.
|
|
*/
|
|
break;
|
|
}
|
|
}
|
|
p->tstamp_type_count = num_ts_types;
|
|
} while (0);
|
|
|
|
/* Clean up temporary allocations */
|
|
if (device_copy != NULL) {
|
|
free(device_copy);
|
|
}
|
|
if (modes != NULL) {
|
|
free(modes);
|
|
}
|
|
if (adapter != NULL) {
|
|
PacketCloseAdapter(adapter);
|
|
}
|
|
|
|
return status;
|
|
}
|
|
#else /* HAVE_PACKET_GET_TIMESTAMP_MODES */
|
|
static int
|
|
get_ts_types(const char *device _U_, pcap_t *p _U_, char *ebuf _U_)
|
|
{
|
|
/*
|
|
* Nothing to fetch, so it always "succeeds".
|
|
*/
|
|
return 0;
|
|
}
|
|
#endif /* HAVE_PACKET_GET_TIMESTAMP_MODES */
|
|
|
|
pcap_t *
|
|
pcap_create_interface(const char *device _U_, char *ebuf)
|
|
{
|
|
pcap_t *p;
|
|
|
|
p = PCAP_CREATE_COMMON(ebuf, struct pcap_win);
|
|
if (p == NULL)
|
|
return (NULL);
|
|
|
|
p->activate_op = pcap_activate_npf;
|
|
p->can_set_rfmon_op = pcap_can_set_rfmon_npf;
|
|
|
|
if (get_ts_types(device, p, ebuf) == -1) {
|
|
pcap_close(p);
|
|
return (NULL);
|
|
}
|
|
return (p);
|
|
}
|
|
|
|
static int
|
|
pcap_setfilter_npf(pcap_t *p, struct bpf_program *fp)
|
|
{
|
|
struct pcap_win *pw = p->priv;
|
|
|
|
if(PacketSetBpf(pw->adapter,fp)==FALSE){
|
|
/*
|
|
* Kernel filter not installed.
|
|
*
|
|
* XXX - we don't know whether this failed because:
|
|
*
|
|
* the kernel rejected the filter program as invalid,
|
|
* in which case we should fall back on userland
|
|
* filtering;
|
|
*
|
|
* the kernel rejected the filter program as too big,
|
|
* in which case we should again fall back on
|
|
* userland filtering;
|
|
*
|
|
* there was some other problem, in which case we
|
|
* should probably report an error.
|
|
*
|
|
* For NPF devices, the Win32 status will be
|
|
* STATUS_INVALID_DEVICE_REQUEST for invalid
|
|
* filters, but I don't know what it'd be for
|
|
* other problems, and for some other devices
|
|
* it might not be set at all.
|
|
*
|
|
* So we just fall back on userland filtering in
|
|
* all cases.
|
|
*/
|
|
|
|
/*
|
|
* install_bpf_program() validates the program.
|
|
*
|
|
* XXX - what if we already have a filter in the kernel?
|
|
*/
|
|
if (install_bpf_program(p, fp) < 0)
|
|
return (-1);
|
|
pw->filtering_in_kernel = 0; /* filtering in userland */
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* It worked.
|
|
*/
|
|
pw->filtering_in_kernel = 1; /* filtering in the kernel */
|
|
|
|
/*
|
|
* Discard any previously-received packets, as they might have
|
|
* passed whatever filter was formerly in effect, but might
|
|
* not pass this filter (BIOCSETF discards packets buffered
|
|
* in the kernel, so you can lose packets in any case).
|
|
*/
|
|
p->cc = 0;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* We filter at user level, since the kernel driver doesn't process the packets
|
|
*/
|
|
static int
|
|
pcap_setfilter_win32_dag(pcap_t *p, struct bpf_program *fp) {
|
|
|
|
if(!fp)
|
|
{
|
|
pcap_strlcpy(p->errbuf, "setfilter: No filter specified", sizeof(p->errbuf));
|
|
return (-1);
|
|
}
|
|
|
|
/* Install a user level filter */
|
|
if (install_bpf_program(p, fp) < 0)
|
|
return (-1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
pcap_getnonblock_npf(pcap_t *p)
|
|
{
|
|
struct pcap_win *pw = p->priv;
|
|
|
|
/*
|
|
* XXX - if there were a PacketGetReadTimeout() call, we
|
|
* would use it, and return 1 if the timeout is -1
|
|
* and 0 otherwise.
|
|
*/
|
|
return (pw->nonblock);
|
|
}
|
|
|
|
static int
|
|
pcap_setnonblock_npf(pcap_t *p, int nonblock)
|
|
{
|
|
struct pcap_win *pw = p->priv;
|
|
int newtimeout;
|
|
|
|
if (nonblock) {
|
|
/*
|
|
* Set the packet buffer timeout to -1 for non-blocking
|
|
* mode.
|
|
*/
|
|
newtimeout = -1;
|
|
} else {
|
|
/*
|
|
* Restore the timeout set when the device was opened.
|
|
* (Note that this may be -1, in which case we're not
|
|
* really leaving non-blocking mode. However, although
|
|
* the timeout argument to pcap_set_timeout() and
|
|
* pcap_open_live() is an int, you're not supposed to
|
|
* supply a negative value, so that "shouldn't happen".)
|
|
*/
|
|
newtimeout = p->opt.timeout;
|
|
}
|
|
if (!PacketSetReadTimeout(pw->adapter, newtimeout)) {
|
|
pcap_fmt_errmsg_for_win32_err(p->errbuf, PCAP_ERRBUF_SIZE,
|
|
GetLastError(), "PacketSetReadTimeout");
|
|
return (-1);
|
|
}
|
|
pw->nonblock = (newtimeout == -1);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
pcap_add_if_npf(pcap_if_list_t *devlistp, char *name, bpf_u_int32 flags,
|
|
const char *description, char *errbuf)
|
|
{
|
|
pcap_if_t *curdev;
|
|
npf_if_addr if_addrs[MAX_NETWORK_ADDRESSES];
|
|
LONG if_addr_size;
|
|
int res = 0;
|
|
|
|
if_addr_size = MAX_NETWORK_ADDRESSES;
|
|
|
|
/*
|
|
* Add an entry for this interface, with no addresses.
|
|
*/
|
|
curdev = add_dev(devlistp, name, flags, description, errbuf);
|
|
if (curdev == NULL) {
|
|
/*
|
|
* Failure.
|
|
*/
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* Get the list of addresses for the interface.
|
|
*/
|
|
if (!PacketGetNetInfoEx((void *)name, if_addrs, &if_addr_size)) {
|
|
/*
|
|
* Failure.
|
|
*
|
|
* We don't return an error, because this can happen with
|
|
* NdisWan interfaces, and we want to supply them even
|
|
* if we can't supply their addresses.
|
|
*
|
|
* We return an entry with an empty address list.
|
|
*/
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Now add the addresses.
|
|
*/
|
|
while (if_addr_size-- > 0) {
|
|
/*
|
|
* "curdev" is an entry for this interface; add an entry for
|
|
* this address to its list of addresses.
|
|
*/
|
|
res = add_addr_to_dev(curdev,
|
|
(struct sockaddr *)&if_addrs[if_addr_size].IPAddress,
|
|
sizeof (struct sockaddr_storage),
|
|
(struct sockaddr *)&if_addrs[if_addr_size].SubnetMask,
|
|
sizeof (struct sockaddr_storage),
|
|
(struct sockaddr *)&if_addrs[if_addr_size].Broadcast,
|
|
sizeof (struct sockaddr_storage),
|
|
NULL,
|
|
0,
|
|
errbuf);
|
|
if (res == -1) {
|
|
/*
|
|
* Failure.
|
|
*/
|
|
break;
|
|
}
|
|
}
|
|
|
|
return (res);
|
|
}
|
|
|
|
static int
|
|
get_if_flags(const char *name, bpf_u_int32 *flags, char *errbuf)
|
|
{
|
|
char *name_copy;
|
|
ADAPTER *adapter;
|
|
int status;
|
|
size_t len;
|
|
NDIS_HARDWARE_STATUS hardware_status;
|
|
#ifdef OID_GEN_PHYSICAL_MEDIUM
|
|
NDIS_PHYSICAL_MEDIUM phys_medium;
|
|
bpf_u_int32 gen_physical_medium_oids[] = {
|
|
#ifdef OID_GEN_PHYSICAL_MEDIUM_EX
|
|
OID_GEN_PHYSICAL_MEDIUM_EX,
|
|
#endif
|
|
OID_GEN_PHYSICAL_MEDIUM
|
|
};
|
|
#define N_GEN_PHYSICAL_MEDIUM_OIDS (sizeof gen_physical_medium_oids / sizeof gen_physical_medium_oids[0])
|
|
size_t i;
|
|
#endif /* OID_GEN_PHYSICAL_MEDIUM */
|
|
#ifdef OID_GEN_LINK_STATE
|
|
NDIS_LINK_STATE link_state;
|
|
#endif
|
|
int connect_status;
|
|
|
|
if (*flags & PCAP_IF_LOOPBACK) {
|
|
/*
|
|
* Loopback interface, so the connection status doesn't
|
|
* apply. and it's not wireless (or wired, for that
|
|
* matter...). We presume it's up and running.
|
|
*/
|
|
*flags |= PCAP_IF_UP | PCAP_IF_RUNNING | PCAP_IF_CONNECTION_STATUS_NOT_APPLICABLE;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* We need to open the adapter to get this information.
|
|
*
|
|
* XXX - PacketOpenAdapter() takes a non-const pointer
|
|
* as an argument, so we make a copy of the argument and
|
|
* pass that to it.
|
|
*/
|
|
name_copy = strdup(name);
|
|
adapter = PacketOpenAdapter(name_copy);
|
|
free(name_copy);
|
|
if (adapter == NULL) {
|
|
/*
|
|
* Give up; if they try to open this device, it'll fail.
|
|
*/
|
|
return (0);
|
|
}
|
|
|
|
#ifdef HAVE_AIRPCAP_API
|
|
/*
|
|
* Airpcap.sys do not support the below 'OID_GEN_x' values.
|
|
* Just set these flags (and none of the '*flags' entered with).
|
|
*/
|
|
if (PacketGetAirPcapHandle(adapter)) {
|
|
/*
|
|
* Must be "up" and "running" if the above if succeeded.
|
|
*/
|
|
*flags = PCAP_IF_UP | PCAP_IF_RUNNING;
|
|
|
|
/*
|
|
* An airpcap device is a wireless device (duh!)
|
|
*/
|
|
*flags |= PCAP_IF_WIRELESS;
|
|
|
|
/*
|
|
* A "network association state" makes no sense for airpcap.
|
|
*/
|
|
*flags |= PCAP_IF_CONNECTION_STATUS_NOT_APPLICABLE;
|
|
PacketCloseAdapter(adapter);
|
|
return (0);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Get the hardware status, and derive "up" and "running" from
|
|
* that.
|
|
*/
|
|
len = sizeof (hardware_status);
|
|
status = oid_get_request(adapter, OID_GEN_HARDWARE_STATUS,
|
|
&hardware_status, &len, errbuf);
|
|
if (status == 0) {
|
|
switch (hardware_status) {
|
|
|
|
case NdisHardwareStatusReady:
|
|
/*
|
|
* "Available and capable of sending and receiving
|
|
* data over the wire", so up and running.
|
|
*/
|
|
*flags |= PCAP_IF_UP | PCAP_IF_RUNNING;
|
|
break;
|
|
|
|
case NdisHardwareStatusInitializing:
|
|
case NdisHardwareStatusReset:
|
|
/*
|
|
* "Initializing" or "Resetting", so up, but
|
|
* not running.
|
|
*/
|
|
*flags |= PCAP_IF_UP;
|
|
break;
|
|
|
|
case NdisHardwareStatusClosing:
|
|
case NdisHardwareStatusNotReady:
|
|
/*
|
|
* "Closing" or "Not ready", so neither up nor
|
|
* running.
|
|
*/
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* Unknown.
|
|
*/
|
|
break;
|
|
}
|
|
} else {
|
|
/*
|
|
* Can't get the hardware status, so assume both up and
|
|
* running.
|
|
*/
|
|
*flags |= PCAP_IF_UP | PCAP_IF_RUNNING;
|
|
}
|
|
|
|
/*
|
|
* Get the network type.
|
|
*/
|
|
#ifdef OID_GEN_PHYSICAL_MEDIUM
|
|
/*
|
|
* Try the OIDs we have for this, in order.
|
|
*/
|
|
for (i = 0; i < N_GEN_PHYSICAL_MEDIUM_OIDS; i++) {
|
|
len = sizeof (phys_medium);
|
|
status = oid_get_request(adapter, gen_physical_medium_oids[i],
|
|
&phys_medium, &len, errbuf);
|
|
if (status == 0) {
|
|
/*
|
|
* Success.
|
|
*/
|
|
break;
|
|
}
|
|
/*
|
|
* Failed. We can't determine whether it failed
|
|
* because that particular OID isn't supported
|
|
* or because some other problem occurred, so we
|
|
* just drive on and try the next OID.
|
|
*/
|
|
}
|
|
if (status == 0) {
|
|
/*
|
|
* We got the physical medium.
|
|
*
|
|
* XXX - we might want to check for NdisPhysicalMediumWiMax
|
|
* and NdisPhysicalMediumNative802_15_4 being
|
|
* part of the enum, and check for those in the "wireless"
|
|
* case.
|
|
*/
|
|
DIAG_OFF_ENUM_SWITCH
|
|
switch (phys_medium) {
|
|
|
|
case NdisPhysicalMediumWirelessLan:
|
|
case NdisPhysicalMediumWirelessWan:
|
|
case NdisPhysicalMediumNative802_11:
|
|
case NdisPhysicalMediumBluetooth:
|
|
case NdisPhysicalMediumUWB:
|
|
case NdisPhysicalMediumIrda:
|
|
/*
|
|
* Wireless.
|
|
*/
|
|
*flags |= PCAP_IF_WIRELESS;
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* Not wireless or unknown
|
|
*/
|
|
break;
|
|
}
|
|
DIAG_ON_ENUM_SWITCH
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Get the connection status.
|
|
*/
|
|
#ifdef OID_GEN_LINK_STATE
|
|
len = sizeof(link_state);
|
|
status = oid_get_request(adapter, OID_GEN_LINK_STATE, &link_state,
|
|
&len, errbuf);
|
|
if (status == 0) {
|
|
/*
|
|
* NOTE: this also gives us the receive and transmit
|
|
* link state.
|
|
*/
|
|
switch (link_state.MediaConnectState) {
|
|
|
|
case MediaConnectStateConnected:
|
|
/*
|
|
* It's connected.
|
|
*/
|
|
*flags |= PCAP_IF_CONNECTION_STATUS_CONNECTED;
|
|
break;
|
|
|
|
case MediaConnectStateDisconnected:
|
|
/*
|
|
* It's disconnected.
|
|
*/
|
|
*flags |= PCAP_IF_CONNECTION_STATUS_DISCONNECTED;
|
|
break;
|
|
|
|
case MediaConnectStateUnknown:
|
|
default:
|
|
/*
|
|
* It's unknown whether it's connected or not.
|
|
*/
|
|
break;
|
|
}
|
|
}
|
|
#else
|
|
/*
|
|
* OID_GEN_LINK_STATE isn't supported because it's not in our SDK.
|
|
*/
|
|
status = -1;
|
|
#endif
|
|
if (status == -1) {
|
|
/*
|
|
* OK, OID_GEN_LINK_STATE didn't work, try
|
|
* OID_GEN_MEDIA_CONNECT_STATUS.
|
|
*/
|
|
status = oid_get_request(adapter, OID_GEN_MEDIA_CONNECT_STATUS,
|
|
&connect_status, &len, errbuf);
|
|
if (status == 0) {
|
|
switch (connect_status) {
|
|
|
|
case NdisMediaStateConnected:
|
|
/*
|
|
* It's connected.
|
|
*/
|
|
*flags |= PCAP_IF_CONNECTION_STATUS_CONNECTED;
|
|
break;
|
|
|
|
case NdisMediaStateDisconnected:
|
|
/*
|
|
* It's disconnected.
|
|
*/
|
|
*flags |= PCAP_IF_CONNECTION_STATUS_DISCONNECTED;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
PacketCloseAdapter(adapter);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
pcap_platform_finddevs(pcap_if_list_t *devlistp, char *errbuf)
|
|
{
|
|
int ret = 0;
|
|
const char *desc;
|
|
char *AdaptersName;
|
|
ULONG NameLength;
|
|
char *name;
|
|
|
|
/*
|
|
* Find out how big a buffer we need.
|
|
*
|
|
* This call should always return FALSE; if the error is
|
|
* ERROR_INSUFFICIENT_BUFFER, NameLength will be set to
|
|
* the size of the buffer we need, otherwise there's a
|
|
* problem, and NameLength should be set to 0.
|
|
*
|
|
* It shouldn't require NameLength to be set, but,
|
|
* at least as of WinPcap 4.1.3, it checks whether
|
|
* NameLength is big enough before it checks for a
|
|
* NULL buffer argument, so, while it'll still do
|
|
* the right thing if NameLength is uninitialized and
|
|
* whatever junk happens to be there is big enough
|
|
* (because the pointer argument will be null), it's
|
|
* still reading an uninitialized variable.
|
|
*/
|
|
NameLength = 0;
|
|
if (!PacketGetAdapterNames(NULL, &NameLength))
|
|
{
|
|
DWORD last_error = GetLastError();
|
|
|
|
if (last_error != ERROR_INSUFFICIENT_BUFFER)
|
|
{
|
|
pcap_fmt_errmsg_for_win32_err(errbuf, PCAP_ERRBUF_SIZE,
|
|
last_error, "PacketGetAdapterNames");
|
|
return (-1);
|
|
}
|
|
}
|
|
|
|
if (NameLength <= 0)
|
|
return 0;
|
|
AdaptersName = (char*) malloc(NameLength);
|
|
if (AdaptersName == NULL)
|
|
{
|
|
snprintf(errbuf, PCAP_ERRBUF_SIZE, "Cannot allocate enough memory to list the adapters.");
|
|
return (-1);
|
|
}
|
|
|
|
if (!PacketGetAdapterNames(AdaptersName, &NameLength)) {
|
|
pcap_fmt_errmsg_for_win32_err(errbuf, PCAP_ERRBUF_SIZE,
|
|
GetLastError(), "PacketGetAdapterNames");
|
|
free(AdaptersName);
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* "PacketGetAdapterNames()" returned a list of
|
|
* null-terminated ASCII interface name strings,
|
|
* terminated by a null string, followed by a list
|
|
* of null-terminated ASCII interface description
|
|
* strings, terminated by a null string.
|
|
* This means there are two ASCII nulls at the end
|
|
* of the first list.
|
|
*
|
|
* Find the end of the first list; that's the
|
|
* beginning of the second list.
|
|
*/
|
|
desc = &AdaptersName[0];
|
|
while (*desc != '\0' || *(desc + 1) != '\0')
|
|
desc++;
|
|
|
|
/*
|
|
* Found it - "desc" points to the first of the two
|
|
* nulls at the end of the list of names, so the
|
|
* first byte of the list of descriptions is two bytes
|
|
* after it.
|
|
*/
|
|
desc += 2;
|
|
|
|
/*
|
|
* Loop over the elements in the first list.
|
|
*/
|
|
name = &AdaptersName[0];
|
|
while (*name != '\0') {
|
|
bpf_u_int32 flags = 0;
|
|
|
|
#ifdef HAVE_AIRPCAP_API
|
|
/*
|
|
* Is this an AirPcap device?
|
|
* If so, ignore it; it'll get added later, by the
|
|
* AirPcap code.
|
|
*/
|
|
if (device_is_airpcap(name, errbuf) == 1) {
|
|
name += strlen(name) + 1;
|
|
desc += strlen(desc) + 1;
|
|
continue;
|
|
}
|
|
#endif
|
|
|
|
#ifdef HAVE_PACKET_IS_LOOPBACK_ADAPTER
|
|
/*
|
|
* Is this a loopback interface?
|
|
*/
|
|
if (PacketIsLoopbackAdapter(name)) {
|
|
/* Yes */
|
|
flags |= PCAP_IF_LOOPBACK;
|
|
}
|
|
#endif
|
|
/*
|
|
* Get additional flags.
|
|
*/
|
|
if (get_if_flags(name, &flags, errbuf) == -1) {
|
|
/*
|
|
* Failure.
|
|
*/
|
|
ret = -1;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Add an entry for this interface.
|
|
*/
|
|
if (pcap_add_if_npf(devlistp, name, flags, desc,
|
|
errbuf) == -1) {
|
|
/*
|
|
* Failure.
|
|
*/
|
|
ret = -1;
|
|
break;
|
|
}
|
|
name += strlen(name) + 1;
|
|
desc += strlen(desc) + 1;
|
|
}
|
|
|
|
free(AdaptersName);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Return the name of a network interface attached to the system, or NULL
|
|
* if none can be found. The interface must be configured up; the
|
|
* lowest unit number is preferred; loopback is ignored.
|
|
*
|
|
* In the best of all possible worlds, this would be the same as on
|
|
* UN*X, but there may be software that expects this to return a
|
|
* full list of devices after the first device.
|
|
*/
|
|
#define ADAPTERSNAME_LEN 8192
|
|
char *
|
|
pcap_lookupdev(char *errbuf)
|
|
{
|
|
DWORD dwVersion;
|
|
DWORD dwWindowsMajorVersion;
|
|
|
|
/*
|
|
* We disable this in "new API" mode, because 1) in WinPcap/Npcap,
|
|
* it may return UTF-16 strings, for backwards-compatibility
|
|
* reasons, and we're also disabling the hack to make that work,
|
|
* for not-going-past-the-end-of-a-string reasons, and 2) we
|
|
* want its behavior to be consistent.
|
|
*
|
|
* In addition, it's not thread-safe, so we've marked it as
|
|
* deprecated.
|
|
*/
|
|
if (pcap_new_api) {
|
|
snprintf(errbuf, PCAP_ERRBUF_SIZE,
|
|
"pcap_lookupdev() is deprecated and is not supported in programs calling pcap_init()");
|
|
return (NULL);
|
|
}
|
|
|
|
/* disable MSVC's GetVersion() deprecated warning here */
|
|
DIAG_OFF_DEPRECATION
|
|
dwVersion = GetVersion(); /* get the OS version */
|
|
DIAG_ON_DEPRECATION
|
|
dwWindowsMajorVersion = (DWORD)(LOBYTE(LOWORD(dwVersion)));
|
|
|
|
if (dwVersion >= 0x80000000 && dwWindowsMajorVersion >= 4) {
|
|
/*
|
|
* Windows 95, 98, ME.
|
|
*/
|
|
ULONG NameLength = ADAPTERSNAME_LEN;
|
|
static char AdaptersName[ADAPTERSNAME_LEN];
|
|
|
|
if (PacketGetAdapterNames(AdaptersName,&NameLength) )
|
|
return (AdaptersName);
|
|
else
|
|
return NULL;
|
|
} else {
|
|
/*
|
|
* Windows NT (NT 4.0 and later).
|
|
* Convert the names to Unicode for backward compatibility.
|
|
*/
|
|
ULONG NameLength = ADAPTERSNAME_LEN;
|
|
static WCHAR AdaptersName[ADAPTERSNAME_LEN];
|
|
size_t BufferSpaceLeft;
|
|
char *tAstr;
|
|
WCHAR *Unameptr;
|
|
char *Adescptr;
|
|
size_t namelen, i;
|
|
WCHAR *TAdaptersName = (WCHAR*)malloc(ADAPTERSNAME_LEN * sizeof(WCHAR));
|
|
int NAdapts = 0;
|
|
|
|
if(TAdaptersName == NULL)
|
|
{
|
|
(void)snprintf(errbuf, PCAP_ERRBUF_SIZE, "memory allocation failure");
|
|
return NULL;
|
|
}
|
|
|
|
if ( !PacketGetAdapterNames((PTSTR)TAdaptersName,&NameLength) )
|
|
{
|
|
pcap_fmt_errmsg_for_win32_err(errbuf, PCAP_ERRBUF_SIZE,
|
|
GetLastError(), "PacketGetAdapterNames");
|
|
free(TAdaptersName);
|
|
return NULL;
|
|
}
|
|
|
|
|
|
BufferSpaceLeft = ADAPTERSNAME_LEN * sizeof(WCHAR);
|
|
tAstr = (char*)TAdaptersName;
|
|
Unameptr = AdaptersName;
|
|
|
|
/*
|
|
* Convert the device names to Unicode into AdapterName.
|
|
*/
|
|
do {
|
|
/*
|
|
* Length of the name, including the terminating
|
|
* NUL.
|
|
*/
|
|
namelen = strlen(tAstr) + 1;
|
|
|
|
/*
|
|
* Do we have room for the name in the Unicode
|
|
* buffer?
|
|
*/
|
|
if (BufferSpaceLeft < namelen * sizeof(WCHAR)) {
|
|
/*
|
|
* No.
|
|
*/
|
|
goto quit;
|
|
}
|
|
BufferSpaceLeft -= namelen * sizeof(WCHAR);
|
|
|
|
/*
|
|
* Copy the name, converting ASCII to Unicode.
|
|
* namelen includes the NUL, so we copy it as
|
|
* well.
|
|
*/
|
|
for (i = 0; i < namelen; i++)
|
|
*Unameptr++ = *tAstr++;
|
|
|
|
/*
|
|
* Count this adapter.
|
|
*/
|
|
NAdapts++;
|
|
} while (namelen != 1);
|
|
|
|
/*
|
|
* Copy the descriptions, but don't convert them from
|
|
* ASCII to Unicode.
|
|
*/
|
|
Adescptr = (char *)Unameptr;
|
|
while(NAdapts--)
|
|
{
|
|
size_t desclen;
|
|
|
|
desclen = strlen(tAstr) + 1;
|
|
|
|
/*
|
|
* Do we have room for the name in the Unicode
|
|
* buffer?
|
|
*/
|
|
if (BufferSpaceLeft < desclen) {
|
|
/*
|
|
* No.
|
|
*/
|
|
goto quit;
|
|
}
|
|
|
|
/*
|
|
* Just copy the ASCII string.
|
|
* namelen includes the NUL, so we copy it as
|
|
* well.
|
|
*/
|
|
memcpy(Adescptr, tAstr, desclen);
|
|
Adescptr += desclen;
|
|
tAstr += desclen;
|
|
BufferSpaceLeft -= desclen;
|
|
}
|
|
|
|
quit:
|
|
free(TAdaptersName);
|
|
return (char *)(AdaptersName);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* We can't use the same code that we use on UN*X, as that's doing
|
|
* UN*X-specific calls.
|
|
*
|
|
* We don't just fetch the entire list of devices, search for the
|
|
* particular device, and use its first IPv4 address, as that's too
|
|
* much work to get just one device's netmask.
|
|
*/
|
|
int
|
|
pcap_lookupnet(const char *device, bpf_u_int32 *netp, bpf_u_int32 *maskp,
|
|
char *errbuf)
|
|
{
|
|
/*
|
|
* We need only the first IPv4 address, so we must scan the array returned by PacketGetNetInfo()
|
|
* in order to skip non IPv4 (i.e. IPv6 addresses)
|
|
*/
|
|
npf_if_addr if_addrs[MAX_NETWORK_ADDRESSES];
|
|
LONG if_addr_size = MAX_NETWORK_ADDRESSES;
|
|
struct sockaddr_in *t_addr;
|
|
LONG i;
|
|
|
|
if (!PacketGetNetInfoEx((void *)device, if_addrs, &if_addr_size)) {
|
|
*netp = *maskp = 0;
|
|
return (0);
|
|
}
|
|
|
|
for(i = 0; i < if_addr_size; i++)
|
|
{
|
|
if(if_addrs[i].IPAddress.ss_family == AF_INET)
|
|
{
|
|
t_addr = (struct sockaddr_in *) &(if_addrs[i].IPAddress);
|
|
*netp = t_addr->sin_addr.S_un.S_addr;
|
|
t_addr = (struct sockaddr_in *) &(if_addrs[i].SubnetMask);
|
|
*maskp = t_addr->sin_addr.S_un.S_addr;
|
|
|
|
*netp &= *maskp;
|
|
return (0);
|
|
}
|
|
|
|
}
|
|
|
|
*netp = *maskp = 0;
|
|
return (0);
|
|
}
|
|
|
|
static const char *pcap_lib_version_string;
|
|
|
|
#ifdef HAVE_VERSION_H
|
|
/*
|
|
* libpcap being built for Windows, as part of a WinPcap/Npcap source
|
|
* tree. Include version.h from that source tree to get the WinPcap/Npcap
|
|
* version.
|
|
*
|
|
* XXX - it'd be nice if we could somehow generate the WinPcap/Npcap version
|
|
* number when building as part of WinPcap/Npcap. (It'd be nice to do so
|
|
* for the packet.dll version number as well.)
|
|
*/
|
|
#include "../../version.h"
|
|
|
|
static const char pcap_version_string[] =
|
|
WINPCAP_PRODUCT_NAME " version " WINPCAP_VER_STRING ", based on " PCAP_VERSION_STRING;
|
|
|
|
const char *
|
|
pcap_lib_version(void)
|
|
{
|
|
if (pcap_lib_version_string == NULL) {
|
|
/*
|
|
* Generate the version string.
|
|
*/
|
|
const char *packet_version_string = PacketGetVersion();
|
|
|
|
if (strcmp(WINPCAP_VER_STRING, packet_version_string) == 0) {
|
|
/*
|
|
* WinPcap/Npcap version string and packet.dll version
|
|
* string are the same; just report the WinPcap/Npcap
|
|
* version.
|
|
*/
|
|
pcap_lib_version_string = pcap_version_string;
|
|
} else {
|
|
/*
|
|
* WinPcap/Npcap version string and packet.dll version
|
|
* string are different; that shouldn't be the
|
|
* case (the two libraries should come from the
|
|
* same version of WinPcap/Npcap), so we report both
|
|
* versions.
|
|
*/
|
|
char *full_pcap_version_string;
|
|
|
|
if (pcap_asprintf(&full_pcap_version_string,
|
|
WINPCAP_PRODUCT_NAME " version " WINPCAP_VER_STRING " (packet.dll version %s), based on " PCAP_VERSION_STRING,
|
|
packet_version_string) != -1) {
|
|
/* Success */
|
|
pcap_lib_version_string = full_pcap_version_string;
|
|
}
|
|
}
|
|
}
|
|
return (pcap_lib_version_string);
|
|
}
|
|
|
|
#else /* HAVE_VERSION_H */
|
|
|
|
/*
|
|
* libpcap being built for Windows, not as part of a WinPcap/Npcap source
|
|
* tree.
|
|
*/
|
|
const char *
|
|
pcap_lib_version(void)
|
|
{
|
|
if (pcap_lib_version_string == NULL) {
|
|
/*
|
|
* Generate the version string. Report the packet.dll
|
|
* version.
|
|
*/
|
|
char *full_pcap_version_string;
|
|
|
|
if (pcap_asprintf(&full_pcap_version_string,
|
|
PCAP_VERSION_STRING " (packet.dll version %s)",
|
|
PacketGetVersion()) != -1) {
|
|
/* Success */
|
|
pcap_lib_version_string = full_pcap_version_string;
|
|
}
|
|
}
|
|
return (pcap_lib_version_string);
|
|
}
|
|
#endif /* HAVE_VERSION_H */
|