Adding upstream version 4.2.2.upstream/4.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 967 insertions, 0 deletions

diff --git a/capture/capture-wpcap.c b/capture/capture-wpcap.c
new file mode 100644
index 00000000..4f7d1dca
--- /dev/null
+++ b/capture/capture-wpcap.c
@@ -0,0 +1,967 @@
+/* capture-wpcap.c
+ * WinPcap/Npcap-specific interfaces for capturing.  We load WinPcap/Npcap
+ * at run time, so that we only need one Wireshark binary and one TShark
+ * binary for Windows, regardless of whether WinPcap/Npcap is installed
+ * or not.
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 2001 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "config.h"
+
+#include <wireshark.h>
+
+#include <windows.h>
+#include <wchar.h>
+#include <tchar.h>
+
+#include <stdio.h>
+
+#include <ws_attributes.h>
+
+#include "capture/capture-wpcap.h"
+#include <wsutil/feature_list.h>
+
+bool has_wpcap = false;
+
+#ifdef HAVE_LIBPCAP
+
+#include <gmodule.h>
+
+#include <epan/strutil.h>
+
+#include "capture/capture_ifinfo.h"
+#include "capture/capture-pcap-util.h"
+#include "capture/capture-pcap-util-int.h"
+
+#include <wsutil/file_util.h>
+#include <wsutil/strtoi.h>
+#include <wsutil/ws_assert.h>
+
+#define MAX_WIN_IF_NAME_LEN 511
+
+static void    (*p_pcap_close) (pcap_t *);
+static int     (*p_pcap_stats) (pcap_t *, struct pcap_stat *);
+static int     (*p_pcap_dispatch) (pcap_t *, int, pcap_handler, unsigned char *);
+static int     (*p_pcap_snapshot) (pcap_t *);
+static int     (*p_pcap_datalink) (pcap_t *);
+static int     (*p_pcap_setfilter) (pcap_t *, struct bpf_program *);
+static char*   (*p_pcap_geterr) (pcap_t *);
+static int     (*p_pcap_compile) (pcap_t *, struct bpf_program *, const char *, int,
+			bpf_u_int32);
+static int     (*p_pcap_compile_nopcap) (int, int, struct bpf_program *, const char *, int,
+			bpf_u_int32);
+static int     (*p_pcap_lookupnet) (const char *, bpf_u_int32 *, bpf_u_int32 *,
+			char *);
+static pcap_t* (*p_pcap_open_live) (const char *, int, int, int, char *);
+static int     (*p_pcap_loop) (pcap_t *, int, pcap_handler, unsigned char *);
+static pcap_t* (*p_pcap_open_dead) (int, int);
+static void    (*p_pcap_freecode) (struct bpf_program *);
+static int     (*p_pcap_findalldevs) (pcap_if_t **, char *);
+static void    (*p_pcap_freealldevs) (pcap_if_t *);
+static int (*p_pcap_datalink_name_to_val) (const char *);
+static const char *(*p_pcap_datalink_val_to_name) (int);
+static const char *(*p_pcap_datalink_val_to_description) (int);
+static void    (*p_pcap_breakloop) (pcap_t *);
+static const char *(*p_pcap_lib_version) (void);
+static int     (*p_pcap_setbuff) (pcap_t *, int dim);
+static int     (*p_pcap_next_ex) (pcap_t *, struct pcap_pkthdr **pkt_header, const u_char **pkt_data);
+#ifdef HAVE_PCAP_REMOTE
+static pcap_t* (*p_pcap_open) (const char *, int, int, int,
+			       struct pcap_rmtauth *, char *);
+static int     (*p_pcap_findalldevs_ex) (const char *, struct pcap_rmtauth *,
+					 pcap_if_t **, char *);
+static int     (*p_pcap_createsrcstr) (char *, int, const char *, const char *,
+				       const char *, char *);
+#endif
+#ifdef HAVE_PCAP_SETSAMPLING
+static struct pcap_samp* (*p_pcap_setsampling)(pcap_t *);
+#endif
+
+static int 	(*p_pcap_list_datalinks)(pcap_t *, int **);
+static int	(*p_pcap_set_datalink)(pcap_t *, int);
+
+#ifdef HAVE_PCAP_FREE_DATALINKS
+static int	(*p_pcap_free_datalinks)(int *);
+#endif
+
+static char	*(*p_bpf_image)(const struct bpf_insn *, int);
+
+#ifdef HAVE_PCAP_CREATE
+static pcap_t	*(*p_pcap_create)(const char *, char *);
+static int	(*p_pcap_set_snaplen)(pcap_t *, int);
+static int	(*p_pcap_set_promisc)(pcap_t *, int);
+static int	(*p_pcap_can_set_rfmon)(pcap_t *);
+static int	(*p_pcap_set_rfmon)(pcap_t *, int);
+static int	(*p_pcap_set_timeout)(pcap_t *, int);
+static int	(*p_pcap_set_buffer_size)(pcap_t *, int);
+static int	(*p_pcap_activate)(pcap_t *);
+static const char *(*p_pcap_statustostr)(int);
+#endif
+
+#ifdef HAVE_PCAP_SET_TSTAMP_TYPE
+static int      (*p_pcap_set_tstamp_type)(pcap_t *, int);
+static int      (*p_pcap_set_tstamp_precision)(pcap_t *, int);
+static int      (*p_pcap_get_tstamp_precision)(pcap_t *);
+static int      (*p_pcap_list_tstamp_types)(pcap_t *, int **);
+static void     (*p_pcap_free_tstamp_types)(int *);
+static int      (*p_pcap_tstamp_type_name_to_val)(const char *);
+static const char * (*p_pcap_tstamp_type_val_to_name)(int);
+static const char * (*p_pcap_tstamp_type_val_to_description)(int);
+#endif
+
+typedef struct {
+	const char	*name;
+	void *	*ptr;
+	bool	optional;
+} symbol_table_t;
+
+#define SYM(x, y)	{ G_STRINGIFY(x) , (void *) &G_PASTE(p_,x), y }
+
+void
+load_wpcap(void)
+{
+
+	/* These are the symbols I need or want from Wpcap */
+	static const symbol_table_t	symbols[] = {
+		SYM(pcap_close, false),
+		SYM(pcap_stats, false),
+		SYM(pcap_dispatch, false),
+		SYM(pcap_snapshot, false),
+		SYM(pcap_datalink, false),
+		SYM(pcap_setfilter, false),
+		SYM(pcap_geterr, false),
+		SYM(pcap_compile, false),
+		SYM(pcap_compile_nopcap, false),
+		SYM(pcap_lookupnet, false),
+#ifdef HAVE_PCAP_REMOTE
+		SYM(pcap_open, false),
+		SYM(pcap_findalldevs_ex, false),
+		SYM(pcap_createsrcstr, false),
+#endif
+		SYM(pcap_open_live, false),
+		SYM(pcap_open_dead, false),
+#ifdef HAVE_PCAP_SETSAMPLING
+		SYM(pcap_setsampling, true),
+#endif
+		SYM(pcap_loop, false),
+		SYM(pcap_freecode, false),
+		SYM(pcap_findalldevs, false),
+		SYM(pcap_freealldevs, false),
+		SYM(pcap_datalink_name_to_val, false),
+		SYM(pcap_datalink_val_to_name, false),
+		SYM(pcap_datalink_val_to_description, false),
+		SYM(pcap_breakloop, false),
+		SYM(pcap_lib_version, false),
+		SYM(pcap_setbuff, true),
+		SYM(pcap_next_ex, true),
+		SYM(pcap_list_datalinks, false),
+		SYM(pcap_set_datalink, false),
+#ifdef HAVE_PCAP_FREE_DATALINKS
+		SYM(pcap_free_datalinks, true),
+#endif
+		SYM(bpf_image, false),
+#ifdef HAVE_PCAP_CREATE
+		SYM(pcap_create, true),
+		SYM(pcap_set_snaplen, true),
+		SYM(pcap_set_promisc, true),
+		SYM(pcap_can_set_rfmon, true),
+		SYM(pcap_set_rfmon, true),
+		SYM(pcap_set_timeout, false),
+		SYM(pcap_set_buffer_size, false),
+		SYM(pcap_activate, true),
+		SYM(pcap_statustostr, true),
+#endif
+#ifdef HAVE_PCAP_SET_TSTAMP_TYPE
+		SYM(pcap_set_tstamp_type, true),
+		SYM(pcap_set_tstamp_precision, true),
+		SYM(pcap_get_tstamp_precision, true),
+		SYM(pcap_list_tstamp_types, true),
+		SYM(pcap_free_tstamp_types, true),
+		SYM(pcap_tstamp_type_name_to_val, true),
+		SYM(pcap_tstamp_type_val_to_name, true),
+		SYM(pcap_tstamp_type_val_to_description, true),
+#endif
+		{ NULL, NULL, false }
+	};
+
+	GModule		*wh; /* wpcap handle */
+	const symbol_table_t	*sym;
+
+	wh = load_wpcap_module();
+
+	if (!wh) {
+		return;
+	}
+
+	sym = symbols;
+	while (sym->name) {
+		if (!g_module_symbol(wh, sym->name, sym->ptr)) {
+			if (sym->optional) {
+				/*
+				 * We don't care if it's missing; we just
+				 * don't use it.
+				 */
+				*sym->ptr = NULL;
+			} else {
+				/*
+				 * We require this symbol.
+				 */
+				return;
+			}
+		}
+		sym++;
+	}
+
+
+	has_wpcap = true;
+}
+
+bool
+caplibs_have_npcap(void)
+{
+	return has_wpcap && g_str_has_prefix(p_pcap_lib_version(), "Npcap");
+}
+
+bool
+caplibs_get_npcap_version(unsigned int *major, unsigned int *minor)
+{
+	const char *version;
+	static const char prefix[] = "Npcap version ";
+
+	if (!has_wpcap)
+		return false;	/* we don't have any pcap */
+
+	version = p_pcap_lib_version();
+	if (!g_str_has_prefix(version, prefix))
+		return false;	/* we have it, but it's not Npcap */
+
+	/*
+	 * This is Npcap; return the major and minor version numbers.
+	 * First, skip pas the "Npcap version " prefix.
+	 */
+	const char *major_version_number;
+	const char *minor_version_number;
+	const char *p;
+
+	/*
+	 * Get the major version number.
+	 */
+	major_version_number = version + sizeof prefix - 1;
+	if (!ws_strtou(major_version_number, &p, major))
+		return false;	/* not a number */
+	if (*p != '.')
+		return false;	/* not followed by a "." */
+	p++;	/* skip over the '.' */
+
+	/*
+	 * Get the minor version number.
+	 */
+	minor_version_number = p;
+	if (!ws_strtou(minor_version_number, &p, minor))
+		return false;	/* not a number */
+	if (*p != ',' && *p != '.' && *p != '\0') {
+		/*
+		 * Not followed by a comma (to separate from "based on
+		 * libpcap ..."), not followed by a period (in case Npcap
+		 * ever has a dot-dot release), and not followed by a
+		 * '\0' (in case it has only the Npcap version number).
+		 */
+		return false;
+	}
+	return true;
+}
+
+static char *
+local_code_page_str_to_utf8(char *str)
+{
+	ULONG utf16_len;
+	wchar_t *utf16_str;
+	char *utf8_str;
+
+	if (str == NULL) {
+		return NULL;
+	}
+
+	utf16_len = MultiByteToWideChar(CP_ACP, 0, str, -1, NULL, 0);
+	utf16_str = g_malloc_n(utf16_len, sizeof(wchar_t));
+	MultiByteToWideChar(CP_ACP, 0, str, -1, utf16_str, utf16_len);
+
+	utf8_str = g_utf16_to_utf8(utf16_str, -1, NULL, NULL, NULL);
+
+	g_free(utf16_str);
+	return utf8_str;
+}
+
+static void
+prepare_errbuf(char *errbuf)
+{
+	ws_assert(errbuf);
+	errbuf[0] = '\0';
+}
+
+static void
+convert_errbuf_to_utf8(char *errbuf)
+{
+	char *utf8_err;
+	if (errbuf[0] == '\0') {
+		return;
+	}
+	errbuf[PCAP_ERRBUF_SIZE - 1] = '\0';
+	utf8_err = local_code_page_str_to_utf8(errbuf);
+	snprintf(errbuf, PCAP_ERRBUF_SIZE, "%s", utf8_err);
+	g_free(utf8_err);
+}
+
+static char *
+cant_load_winpcap_err(const char *app_name)
+{
+	return ws_strdup_printf(
+"Unable to load Npcap or WinPcap (wpcap.dll); %s will not be able to\n"
+"capture packets.\n"
+"\n"
+"In order to capture packets Npcap or WinPcap must be installed. See\n"
+"\n"
+"        https://npcap.com/\n"
+"\n"
+"for a downloadable version of Npcap and for instructions on how to\n"
+"install it.",
+	    app_name);
+}
+
+void
+pcap_close(pcap_t *a)
+{
+	ws_assert(has_wpcap);
+	p_pcap_close(a);
+}
+
+int
+pcap_stats(pcap_t *a, struct pcap_stat *b)
+{
+	ws_assert(has_wpcap);
+	return p_pcap_stats(a, b);
+}
+
+int
+pcap_dispatch(pcap_t *a, int b, pcap_handler c, unsigned char *d)
+{
+	ws_assert(has_wpcap);
+	return p_pcap_dispatch(a, b, c, d);
+}
+
+int
+pcap_snapshot(pcap_t *a)
+{
+	ws_assert(has_wpcap);
+	return p_pcap_snapshot(a);
+}
+
+int
+pcap_datalink(pcap_t *a)
+{
+	ws_assert(has_wpcap);
+	return p_pcap_datalink(a);
+}
+
+int
+pcap_set_datalink(pcap_t *p, int dlt)
+{
+	ws_assert(has_wpcap);
+	return p_pcap_set_datalink(p, dlt);
+}
+
+int
+pcap_setfilter(pcap_t *a, struct bpf_program *b)
+{
+	ws_assert(has_wpcap);
+	return p_pcap_setfilter(a, b);
+}
+
+char*
+pcap_geterr(pcap_t *a)
+{
+	char *errbuf;
+	ws_assert(has_wpcap);
+	errbuf = p_pcap_geterr(a);
+	convert_errbuf_to_utf8(errbuf);
+	return errbuf;
+}
+
+int
+pcap_compile(pcap_t *a, struct bpf_program *b, const char *c, int d,
+	     bpf_u_int32 e)
+{
+	ws_assert(has_wpcap);
+	return p_pcap_compile(a, b, c, d, e);
+}
+
+int
+pcap_compile_nopcap(int a, int b, struct bpf_program *c, const char *d, int e,
+		    bpf_u_int32 f)
+{
+	ws_assert(has_wpcap);
+	return p_pcap_compile_nopcap(a, b, c, d, e, f);
+}
+
+int
+pcap_lookupnet(const char *a, bpf_u_int32 *b, bpf_u_int32 *c, char *errbuf)
+{
+	int ret;
+	ws_assert(has_wpcap);
+	ret = p_pcap_lookupnet(a, b, c, errbuf);
+	if (ret == -1)
+		convert_errbuf_to_utf8(errbuf);
+	return ret;
+}
+
+pcap_t*
+pcap_open_live(const char *a, int b, int c, int d, char *errbuf)
+{
+	pcap_t *p;
+	if (!has_wpcap) {
+		snprintf(errbuf, PCAP_ERRBUF_SIZE,
+			   "unable to load Npcap or WinPcap (wpcap.dll); can't open %s to capture",
+			   a);
+		return NULL;
+	}
+	prepare_errbuf(errbuf);
+	p = p_pcap_open_live(a, b, c, d, errbuf);
+	convert_errbuf_to_utf8(errbuf);
+	return p;
+}
+
+pcap_t*
+pcap_open_dead(int a, int b)
+{
+	if (!has_wpcap) {
+		return NULL;
+	}
+	return p_pcap_open_dead(a, b);
+}
+
+char *
+bpf_image(const struct bpf_insn *a, int b)
+{
+	if (!has_wpcap) {
+		return NULL;
+	}
+	return p_bpf_image(a, b);
+}
+
+#ifdef HAVE_PCAP_REMOTE
+pcap_t*
+pcap_open(const char *a, int b, int c, int d, struct pcap_rmtauth *e, char *errbuf)
+{
+	pcap_t *ret;
+	if (!has_wpcap) {
+		snprintf(errbuf, PCAP_ERRBUF_SIZE,
+			   "unable to load Npcap or WinPcap (wpcap.dll); can't open %s to capture",
+			   a);
+		return NULL;
+	}
+	prepare_errbuf(errbuf);
+	ret = p_pcap_open(a, b, c, d, e, errbuf);
+	convert_errbuf_to_utf8(errbuf);
+	return ret;
+}
+
+int
+ws_pcap_findalldevs_ex(const char *a, struct pcap_rmtauth *b, pcap_if_t **c, char *errbuf)
+{
+	int ret;
+	ws_assert(has_wpcap);
+	ret = p_pcap_findalldevs_ex(a, b, c, errbuf);
+	if (ret == -1)
+		convert_errbuf_to_utf8(errbuf);
+	return ret;
+}
+
+int
+pcap_createsrcstr(char *a, int b, const char *c, const char *d, const char *e,
+		  char *errbuf)
+{
+	int ret;
+	ws_assert(has_wpcap);
+	ret = p_pcap_createsrcstr(a, b, c, d, e, errbuf);
+	if (ret == -1)
+		convert_errbuf_to_utf8(errbuf);
+	return ret;
+}
+#endif
+
+#ifdef HAVE_PCAP_SETSAMPLING
+struct pcap_samp *
+pcap_setsampling(pcap_t *a)
+{
+	ws_assert(has_wpcap);
+	if (p_pcap_setsampling != NULL) {
+		return p_pcap_setsampling(a);
+	}
+	return NULL;
+}
+#endif
+
+int
+pcap_loop(pcap_t *a, int b, pcap_handler c, unsigned char *d)
+{
+	ws_assert(has_wpcap);
+	return p_pcap_loop(a, b, c, d);
+}
+
+void
+pcap_freecode(struct bpf_program *a)
+{
+	ws_assert(has_wpcap);
+	p_pcap_freecode(a);
+}
+
+int
+pcap_findalldevs(pcap_if_t **a, char *errbuf)
+{
+	int ret;
+	ws_assert(has_wpcap);
+	ret = p_pcap_findalldevs(a, errbuf);
+	if (ret == -1)
+		convert_errbuf_to_utf8(errbuf);
+	return ret;
+}
+
+void
+pcap_freealldevs(pcap_if_t *a)
+{
+	ws_assert(has_wpcap);
+	p_pcap_freealldevs(a);
+}
+
+#ifdef HAVE_PCAP_CREATE
+pcap_t *
+pcap_create(const char *a, char *errbuf)
+{
+	pcap_t *p;
+	ws_assert(has_wpcap && p_pcap_create != NULL);
+	p = p_pcap_create(a, errbuf);
+	if (p == NULL)
+		convert_errbuf_to_utf8(errbuf);
+	return p;
+}
+
+int
+pcap_set_snaplen(pcap_t *a, int b)
+{
+	ws_assert(has_wpcap && p_pcap_set_snaplen != NULL);
+	return p_pcap_set_snaplen(a, b);
+}
+
+int
+pcap_set_promisc(pcap_t *a, int b)
+{
+	ws_assert(has_wpcap && p_pcap_set_promisc != NULL);
+	return p_pcap_set_promisc(a, b);
+}
+
+int
+pcap_can_set_rfmon(pcap_t *a)
+{
+	ws_assert(has_wpcap);
+	if (p_pcap_can_set_rfmon != NULL) {
+		return p_pcap_can_set_rfmon(a);
+	}
+	return 0;
+}
+
+int
+pcap_set_rfmon(pcap_t *a, int b)
+{
+	ws_assert(has_wpcap && p_pcap_set_rfmon != NULL);
+	return p_pcap_set_rfmon(a, b);
+}
+
+int
+pcap_set_timeout(pcap_t *a, int b)
+{
+	ws_assert(has_wpcap && p_pcap_set_timeout != NULL);
+	return p_pcap_set_timeout(a, b);
+}
+int
+pcap_set_buffer_size(pcap_t *a, int b)
+{
+	ws_assert(has_wpcap && p_pcap_set_buffer_size != NULL);
+	return p_pcap_set_buffer_size(a, b);
+}
+
+int
+pcap_activate(pcap_t *a)
+{
+	ws_assert(has_wpcap && p_pcap_activate != NULL);
+	return p_pcap_activate(a);
+
+}
+
+const char *
+pcap_statustostr(int a)
+{
+    static char ebuf[15 + 10 + 1];
+
+    ws_assert(has_wpcap);
+    if (p_pcap_statustostr != NULL) {
+        return p_pcap_statustostr(a);
+    }
+
+    /* XXX copy routine from pcap.c ??? */
+    (void)snprintf(ebuf, sizeof ebuf, "Don't have pcap_statustostr(), can't translate error: %d", a);
+    return(ebuf);
+
+}
+#endif
+
+#ifdef HAVE_PCAP_SET_TSTAMP_TYPE
+int
+pcap_set_tstamp_type(pcap_t *a, int b) {
+	ws_assert(has_wpcap);
+	if (p_pcap_set_tstamp_type != NULL) {
+		return p_pcap_set_tstamp_type(a, b);
+	}
+	return PCAP_ERROR_CANTSET_TSTAMP_TYPE;
+}
+
+int
+pcap_set_tstamp_precision(pcap_t *a, int b) {
+	ws_assert(has_wpcap);
+	if (p_pcap_set_tstamp_precision != NULL) {
+		return p_pcap_set_tstamp_precision(a, b);
+	}
+	// No error code defined so return NOTSUP.
+	return PCAP_ERROR_TSTAMP_PRECISION_NOTSUP;
+}
+
+int
+pcap_get_tstamp_precision(pcap_t *a) {
+	ws_assert(has_wpcap);
+	if (p_pcap_get_tstamp_precision != NULL) {
+		return p_pcap_get_tstamp_precision(a);
+	}
+	// No error code defined so return MICRO.
+	return PCAP_TSTAMP_PRECISION_MICRO;
+}
+
+int
+pcap_list_tstamp_types(pcap_t *a, int **b) {
+	ws_assert(has_wpcap);
+	if (p_pcap_list_tstamp_types != NULL) {
+		return p_pcap_list_tstamp_types(a, b);
+	}
+	return PCAP_ERROR;
+}
+
+void
+pcap_free_tstamp_types(int *a) {
+	ws_assert(has_wpcap);
+	if (p_pcap_free_tstamp_types != NULL) {
+		p_pcap_free_tstamp_types(a);
+	}
+}
+
+int
+pcap_tstamp_type_name_to_val(const char *a) {
+	ws_assert(has_wpcap);
+	if (p_pcap_tstamp_type_name_to_val != NULL) {
+		return p_pcap_tstamp_type_name_to_val(a);
+	}
+	return PCAP_ERROR;
+}
+
+const char *
+pcap_tstamp_type_val_to_name(int a) {
+	ws_assert(has_wpcap);
+	if (p_pcap_tstamp_type_val_to_name != NULL) {
+		return p_pcap_tstamp_type_val_to_name(a);
+	}
+	return NULL;
+}
+
+const char *
+pcap_tstamp_type_val_to_description(int a) {
+	ws_assert(has_wpcap);
+	if (p_pcap_tstamp_type_val_to_description != NULL) {
+		return p_pcap_tstamp_type_val_to_description(a);
+	}
+	return NULL;
+}
+#endif
+
+int
+pcap_datalink_name_to_val(const char *name)
+{
+	if (has_wpcap)
+		return p_pcap_datalink_name_to_val(name);
+	else
+		return -1;
+}
+
+int
+pcap_list_datalinks(pcap_t *p, int **ddlt)
+{
+	if (has_wpcap)
+		return p_pcap_list_datalinks(p, ddlt);
+	else
+		return -1;
+}
+
+#ifdef HAVE_PCAP_FREE_DATALINKS
+void
+pcap_free_datalinks(int *ddlt)
+{
+	ws_assert(has_wpcap);
+
+	/*
+	 * If we don't have pcap_free_datalinks() in WinPcap,
+	 * we don't free the memory - we can't use free(), as
+	 * we might not have been built with the same version
+	 * of the C runtime library as WinPcap was, and, if we're
+	 * not, free() isn't guaranteed to work on something
+	 * allocated by WinPcap.
+	 */
+	if (p_pcap_free_datalinks != NULL)
+		p_pcap_free_datalinks(ddlt);
+}
+#endif
+
+const char *
+pcap_datalink_val_to_name(int dlt)
+{
+	if (has_wpcap)
+		return p_pcap_datalink_val_to_name(dlt);
+	else
+		return NULL;
+}
+
+const char *
+pcap_datalink_val_to_description(int dlt)
+{
+	if (has_wpcap)
+		return p_pcap_datalink_val_to_description(dlt);
+	return NULL;
+}
+
+void pcap_breakloop(pcap_t *a)
+{
+	p_pcap_breakloop(a);
+}
+
+/* setbuff is win32 specific! */
+int pcap_setbuff(pcap_t *a, int b)
+{
+	ws_assert(has_wpcap);
+	return p_pcap_setbuff(a, b);
+}
+
+int pcap_next_ex(pcap_t *a, struct pcap_pkthdr **b, const u_char **c)
+{
+	ws_assert(has_wpcap);
+	return p_pcap_next_ex(a, b, c);
+}
+
+#ifdef HAVE_PCAP_REMOTE
+GList *
+get_remote_interface_list(const char *hostname, const char *port,
+			  int auth_type, const char *username,
+			  const char *passwd, int *err, char **err_str)
+{
+	if (!has_wpcap) {
+		/*
+		 * We don't have Npcap or WinPcap, so we can't get a list of
+		 * interfaces.
+		 */
+		*err = DONT_HAVE_PCAP;
+		if (err_str != NULL)
+			*err_str = cant_load_winpcap_err("you");
+		return NULL;
+	}
+
+	return get_interface_list_findalldevs_ex(hostname, port, auth_type,
+	    username, passwd, err, err_str);
+}
+#endif
+
+GList *
+get_interface_list(int *err, char **err_str)
+{
+	if (!has_wpcap) {
+		/*
+		 * We don't have Npcap or WinPcap, so we can't get a list of
+		 * interfaces.
+		 */
+		*err = DONT_HAVE_PCAP;
+		if (err_str != NULL)
+			*err_str = cant_load_winpcap_err("you");
+		return NULL;
+	}
+
+	return get_interface_list_findalldevs(err, err_str);
+}
+
+/*
+ * Get an error message string for a CANT_GET_INTERFACE_LIST error from
+ * "get_interface_list()".
+ */
+char *
+cant_get_if_list_error_message(const char *err_str)
+{
+	/*
+	 * If the error message includes "Not enough storage is available
+	 * to process this command" or "The operation completed successfully",
+	 * suggest that they install a WinPcap version later than 3.0.
+	 */
+	if (strstr(err_str, "Not enough storage is available to process this command") != NULL ||
+	    strstr(err_str, "The operation completed successfully") != NULL) {
+		return ws_strdup_printf("Can't get list of interfaces: %s\n"
+"This might be a problem with WinPcap 3.0. You should try updating to\n"
+"Npcap. See https://npcap.com/ for more information.",
+		    err_str);
+	}
+	return ws_strdup_printf("Can't get list of interfaces: %s", err_str);
+}
+
+if_capabilities_t *
+get_if_capabilities_local(interface_options *interface_opts,
+    cap_device_open_status *status, char **status_str)
+{
+	/*
+	 * We're not getting capaibilities for a remote device; use
+	 * pcap_create() and pcap_activate() if we have them, so that
+	 * we can set various options, otherwise use pcap_open_live().
+	 */
+#ifdef HAVE_PCAP_CREATE
+	if (p_pcap_create != NULL)
+		return get_if_capabilities_pcap_create(interface_opts, status,
+		    status_str);
+#endif
+	return get_if_capabilities_pcap_open_live(interface_opts, status,
+	    status_str);
+}
+
+pcap_t *
+open_capture_device_local(capture_options *capture_opts,
+    interface_options *interface_opts, int timeout,
+    cap_device_open_status *open_status,
+    char (*open_status_str)[PCAP_ERRBUF_SIZE])
+{
+	/*
+	 * We're not opening a remote device; use pcap_create() and
+	 * pcap_activate() if we have them, so that we can set various
+	 * options, otherwise use pcap_open_live().
+	 */
+#ifdef HAVE_PCAP_CREATE
+	if (p_pcap_create != NULL)
+		return open_capture_device_pcap_create(capture_opts,
+		    interface_opts, timeout, open_status, open_status_str);
+#endif
+	return open_capture_device_pcap_open_live(interface_opts, timeout,
+	    open_status, open_status_str);
+}
+
+/*
+ * Append the WinPcap or Npcap SDK version with which we were compiled to a GString.
+ */
+void
+gather_caplibs_compile_info(feature_list l)
+{
+	with_feature(l, "libpcap");
+}
+
+void
+gather_caplibs_runtime_info(feature_list l)
+{
+	/*
+	 * On Windows, we might have been compiled with WinPcap/Npcap but
+	 * might not have it loaded; indicate whether we have it or
+	 * not and, if we have it, what version we have.
+	 */
+	if (has_wpcap) {
+		with_feature(l, "%s", p_pcap_lib_version());
+	} else
+		without_feature(l, "Npcap or WinPcap");
+}
+
+/*
+ * If npf.sys is running, return true.
+ */
+bool
+npf_sys_is_running(void)
+{
+	SC_HANDLE h_scm, h_serv;
+	SERVICE_STATUS ss;
+
+	h_scm = OpenSCManager(NULL, NULL, 0);
+	if (!h_scm)
+		return false;
+
+	h_serv = OpenService(h_scm, _T("npcap"), SC_MANAGER_CONNECT|SERVICE_QUERY_STATUS);
+	if (!h_serv) {
+		h_serv = OpenService(h_scm, _T("npf"), SC_MANAGER_CONNECT|SERVICE_QUERY_STATUS);
+		if (!h_serv) {
+			CloseServiceHandle(h_scm);
+			return false;
+		}
+	}
+
+	if (QueryServiceStatus(h_serv, &ss)) {
+		if (ss.dwCurrentState & SERVICE_RUNNING) {
+			CloseServiceHandle(h_serv);
+			CloseServiceHandle(h_scm);
+			return true;
+		}
+	}
+	CloseServiceHandle(h_serv);
+	CloseServiceHandle(h_scm);
+	return false;
+}
+
+#else /* HAVE_LIBPCAP */
+
+void
+load_wpcap(void)
+{
+	return;
+}
+
+/*
+ * Append an indication that we were not compiled with WinPcap
+ * to a GString.
+ */
+void
+gather_caplibs_compile_info(feature_list l)
+{
+	without_feature(l, "libpcap");
+}
+
+void
+gather_caplibs_runtime_info(feature_list l _U_)
+{
+}
+
+bool
+caplibs_have_npcap(void)
+{
+	return false;
+}
+
+#endif /* HAVE_LIBPCAP */
+
+/*
+ * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 8
+ * tab-width: 8
+ * indent-tabs-mode: t
+ * End:
+ *
+ * vi: set shiftwidth=8 tabstop=8 noexpandtab:
+ * :indentSize=8:tabSize=8:noTabs=false:
+ */