aboutsummaryrefslogtreecommitdiffstats
path: root/caputils/capture-wpcap.c
diff options
context:
space:
mode:
Diffstat (limited to 'caputils/capture-wpcap.c')
-rw-r--r--caputils/capture-wpcap.c990
1 files changed, 990 insertions, 0 deletions
diff --git a/caputils/capture-wpcap.c b/caputils/capture-wpcap.c
new file mode 100644
index 0000000000..f4f9d61c25
--- /dev/null
+++ b/caputils/capture-wpcap.c
@@ -0,0 +1,990 @@
+/* capture-wpcap.c
+ * WinPcap-specific interfaces for capturing. We load WinPcap at run
+ * time, so that we only need one Wireshark binary and one TShark binary
+ * for Windows, regardless of whether WinPcap is installed or not.
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 2001 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+
+#include <stdio.h>
+#include <glib.h>
+#include <gmodule.h>
+
+#include <epan/strutil.h>
+
+#include "caputils/capture_ifinfo.h"
+#include "caputils/capture-pcap-util.h"
+#include "caputils/capture-pcap-util-int.h"
+#include "caputils/capture-wpcap.h"
+
+#include <wsutil/file_util.h>
+
+/* XXX - yes, I know, I should move cppmagic.h to a generic location. */
+#include "tools/lemon/cppmagic.h"
+
+#define MAX_WIN_IF_NAME_LEN 511
+
+
+gboolean has_wpcap = FALSE;
+
+#ifdef HAVE_LIBPCAP
+
+/*
+ * XXX - should we require at least WinPcap 3.1 both for building an
+ * for using Wireshark?
+ */
+
+static char* (*p_pcap_lookupdev) (char *);
+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, guchar *);
+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, guchar *);
+#ifdef HAVE_PCAP_OPEN_DEAD
+static pcap_t* (*p_pcap_open_dead) (int, int);
+#endif
+static void (*p_pcap_freecode) (struct bpf_program *);
+#ifdef HAVE_PCAP_FINDALLDEVS
+static int (*p_pcap_findalldevs) (pcap_if_t **, char *);
+static void (*p_pcap_freealldevs) (pcap_if_t *);
+#endif
+#ifdef HAVE_PCAP_DATALINK_NAME_TO_VAL
+static int (*p_pcap_datalink_name_to_val) (const char *);
+#endif
+#ifdef HAVE_PCAP_DATALINK_VAL_TO_NAME
+static const char *(*p_pcap_datalink_val_to_name) (int);
+#endif
+#ifdef HAVE_PCAP_DATALINK_VAL_TO_DESCRIPTION
+static const char *(*p_pcap_datalink_val_to_description) (int);
+#endif
+#ifdef HAVE_PCAP_BREAKLOOP
+static void (*p_pcap_breakloop) (pcap_t *);
+#endif
+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) (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
+
+#ifdef HAVE_PCAP_LIST_DATALINKS
+static int (*p_pcap_list_datalinks)(pcap_t *, int **);
+#endif
+
+#ifdef HAVE_PCAP_SET_DATALINK
+static int (*p_pcap_set_datalink)(pcap_t *, int);
+#endif
+
+#ifdef HAVE_PCAP_FREE_DATALINKS
+static int (*p_pcap_free_datalinks)(int *);
+#endif
+
+#ifdef HAVE_BPF_IMAGE
+static char *(*p_bpf_image) (const struct bpf_insn *, int);
+#endif
+
+typedef struct {
+ const char *name;
+ gpointer *ptr;
+ gboolean optional;
+} symbol_table_t;
+
+#define SYM(x, y) { G_STRINGIFY(x) , (gpointer) &CONCAT(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_lookupdev, FALSE),
+ 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),
+#ifdef HAVE_PCAP_OPEN_DEAD
+ SYM(pcap_open_dead, FALSE),
+#endif
+#ifdef HAVE_PCAP_SETSAMPLING
+ SYM(pcap_setsampling, TRUE),
+#endif
+ SYM(pcap_loop, FALSE),
+ SYM(pcap_freecode, TRUE),
+#ifdef HAVE_PCAP_FINDALLDEVS
+ SYM(pcap_findalldevs, TRUE),
+ SYM(pcap_freealldevs, TRUE),
+#endif
+#ifdef HAVE_PCAP_DATALINK_NAME_TO_VAL
+ SYM(pcap_datalink_name_to_val, TRUE),
+#endif
+#ifdef HAVE_PCAP_DATALINK_VAL_TO_NAME
+ SYM(pcap_datalink_val_to_name, TRUE),
+#endif
+#ifdef HAVE_PCAP_DATALINK_VAL_TO_DESCRIPTION
+ SYM(pcap_datalink_val_to_description, TRUE),
+#endif
+#ifdef HAVE_PCAP_BREAKLOOP
+ /*
+ * We don't try to work around the lack of this at
+ * run time; it's present in WinPcap 3.1, which is
+ * the version we build with and ship with.
+ */
+ SYM(pcap_breakloop, FALSE),
+#endif
+ SYM(pcap_lib_version, TRUE),
+ SYM(pcap_setbuff, TRUE),
+ SYM(pcap_next_ex, TRUE),
+#ifdef HAVE_PCAP_LIST_DATALINKS
+ SYM(pcap_list_datalinks, FALSE),
+#endif
+#ifdef HAVE_PCAP_SET_DATALINK
+ SYM(pcap_set_datalink, FALSE),
+#endif
+#ifdef HAVE_PCAP_FREE_DATALINKS
+ SYM(pcap_free_datalinks, TRUE),
+#endif
+#ifdef HAVE_BPF_IMAGE
+ SYM(bpf_image, FALSE),
+#endif
+ { NULL, NULL, FALSE }
+ };
+
+ GModule *wh; /* wpcap handle */
+ const symbol_table_t *sym;
+
+ wh = ws_module_open("wpcap.dll", 0);
+
+ if (!wh) {
+ return;
+ }
+
+ sym = symbols;
+ while (sym->name) {
+ if (!g_module_symbol(wh, sym->name, sym->ptr)) {
+ if (sym->optional) {
+ /*
+ * We don't care if it's missing; we just
+ * don't use it.
+ */
+ *sym->ptr = NULL;
+ } else {
+ /*
+ * We require this symbol.
+ */
+ return;
+ }
+ }
+ sym++;
+ }
+
+
+ has_wpcap = TRUE;
+}
+
+/*
+ * The official list of WinPcap mirrors is at
+ * http://www.winpcap.org/misc/mirrors.htm
+ */
+char *
+cant_load_winpcap_err(const char *app_name)
+{
+ return g_strdup_printf(
+"Unable to load WinPcap (wpcap.dll); %s will not be able to capture\n"
+"packets.\n"
+"\n"
+"In order to capture packets, WinPcap must be installed; see\n"
+"\n"
+" http://www.winpcap.org/\n"
+"\n"
+"or the mirror at\n"
+"\n"
+" http://www.mirrors.wiretapped.net/security/packet-capture/winpcap/\n"
+"\n"
+"or the mirror at\n"
+"\n"
+" http://winpcap.cs.pu.edu.tw/\n"
+"\n"
+"for a downloadable version of WinPcap and for instructions on how to install\n"
+"WinPcap.",
+ app_name);
+}
+
+char*
+pcap_lookupdev (char *a)
+{
+ if (!has_wpcap) {
+ return NULL;
+ }
+ return p_pcap_lookupdev(a);
+}
+
+void
+pcap_close(pcap_t *a)
+{
+ g_assert(has_wpcap);
+ p_pcap_close(a);
+}
+
+int
+pcap_stats(pcap_t *a, struct pcap_stat *b)
+{
+ g_assert(has_wpcap);
+ return p_pcap_stats(a, b);
+}
+
+int
+pcap_dispatch(pcap_t *a, int b, pcap_handler c, guchar *d)
+{
+ g_assert(has_wpcap);
+ return p_pcap_dispatch(a, b, c, d);
+}
+
+int
+pcap_snapshot(pcap_t *a)
+{
+ g_assert(has_wpcap);
+ return p_pcap_snapshot(a);
+}
+
+int
+pcap_datalink(pcap_t *a)
+{
+ g_assert(has_wpcap);
+ return p_pcap_datalink(a);
+}
+
+#ifdef HAVE_PCAP_SET_DATALINK
+int
+pcap_set_datalink(pcap_t *p, int dlt)
+{
+ g_assert(has_wpcap);
+ return p_pcap_set_datalink(p, dlt);
+}
+#endif
+
+int
+pcap_setfilter(pcap_t *a, struct bpf_program *b)
+{
+ g_assert(has_wpcap);
+ return p_pcap_setfilter(a, b);
+}
+
+char*
+pcap_geterr(pcap_t *a)
+{
+ g_assert(has_wpcap);
+ return p_pcap_geterr(a);
+}
+
+int
+pcap_compile(pcap_t *a, struct bpf_program *b, const char *c, int d,
+ bpf_u_int32 e)
+{
+ g_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)
+{
+ g_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 *d)
+{
+ g_assert(has_wpcap);
+ return p_pcap_lookupnet(a, b, c, d);
+}
+
+pcap_t*
+pcap_open_live(const char *a, int b, int c, int d, char *e)
+{
+ if (!has_wpcap) {
+ g_snprintf(e, PCAP_ERRBUF_SIZE,
+ "unable to load WinPcap (wpcap.dll); can't open %s to capture",
+ a);
+ return NULL;
+ }
+ return p_pcap_open_live(a, b, c, d, e);
+}
+
+#ifdef HAVE_PCAP_OPEN_DEAD
+pcap_t*
+pcap_open_dead(int a, int b)
+{
+ if (!has_wpcap) {
+ return NULL;
+ }
+ return p_pcap_open_dead(a, b);
+}
+#endif
+
+#ifdef HAVE_BPF_IMAGE
+char *
+bpf_image(const struct bpf_insn *a, int b)
+{
+ if (!has_wpcap) {
+ return NULL;
+ }
+ return p_bpf_image(a, b);
+}
+#endif
+
+#ifdef HAVE_PCAP_REMOTE
+pcap_t*
+pcap_open(const char *a, int b, int c, int d, struct pcap_rmtauth *e, char *f)
+{
+ if (!has_wpcap) {
+ g_snprintf(f, PCAP_ERRBUF_SIZE,
+ "unable to load WinPcap (wpcap.dll); can't open %s to capture",
+ a);
+ return NULL;
+ }
+ return p_pcap_open(a, b, c, d, e, f);
+}
+
+int
+pcap_findalldevs_ex(char *a, struct pcap_rmtauth *b, pcap_if_t **c, char *d)
+{
+ g_assert(has_wpcap);
+ return p_pcap_findalldevs_ex(a, b, c, d);
+}
+
+int
+pcap_createsrcstr(char *a, int b, const char *c, const char *d, const char *e,
+ char *f)
+{
+ g_assert(has_wpcap);
+ return p_pcap_createsrcstr(a, b, c, d, e, f);
+}
+#endif
+
+#ifdef HAVE_PCAP_SETSAMPLING
+struct pcap_samp *
+pcap_setsampling(pcap_t *a)
+{
+ g_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, guchar *d)
+{
+ g_assert(has_wpcap);
+ return p_pcap_loop(a, b, c, d);
+}
+
+void
+pcap_freecode(struct bpf_program *a)
+{
+ g_assert(has_wpcap);
+ if(p_pcap_freecode) {
+ p_pcap_freecode(a);
+ }
+}
+
+#ifdef HAVE_PCAP_FINDALLDEVS
+int
+pcap_findalldevs(pcap_if_t **a, char *b)
+{
+ g_assert(has_wpcap && p_pcap_findalldevs != NULL);
+ return p_pcap_findalldevs(a, b);
+}
+
+void
+pcap_freealldevs(pcap_if_t *a)
+{
+ g_assert(has_wpcap && p_pcap_freealldevs != NULL);
+ p_pcap_freealldevs(a);
+}
+#endif
+
+#if defined(HAVE_PCAP_DATALINK_NAME_TO_VAL) || defined(HAVE_PCAP_DATALINK_VAL_TO_NAME) || defined(HAVE_PCAP_DATALINK_VAL_TO_DESCRIPTION)
+/*
+ * Table of DLT_ types, names, and descriptions, for use if the version
+ * of WinPcap we have installed lacks "pcap_datalink_name_to_val()"
+ * or "pcap_datalink_val_to_name()".
+ */
+struct dlt_choice {
+ const char *name;
+ const char *description;
+ int dlt;
+};
+
+#define DLT_CHOICE(code, description) { #code, description, code }
+#define DLT_CHOICE_SENTINEL { NULL, NULL, 0 }
+
+static struct dlt_choice dlt_choices[] = {
+ DLT_CHOICE(DLT_NULL, "BSD loopback"),
+ DLT_CHOICE(DLT_EN10MB, "Ethernet"),
+ DLT_CHOICE(DLT_IEEE802, "Token ring"),
+ DLT_CHOICE(DLT_ARCNET, "ARCNET"),
+ DLT_CHOICE(DLT_SLIP, "SLIP"),
+ DLT_CHOICE(DLT_PPP, "PPP"),
+ DLT_CHOICE(DLT_FDDI, "FDDI"),
+ DLT_CHOICE(DLT_ATM_RFC1483, "RFC 1483 IP-over-ATM"),
+ DLT_CHOICE(DLT_RAW, "Raw IP"),
+#ifdef DLT_SLIP_BSDOS
+ DLT_CHOICE(DLT_SLIP_BSDOS, "BSD/OS SLIP"),
+#endif
+#ifdef DLT_PPP_BSDOS
+ DLT_CHOICE(DLT_PPP_BSDOS, "BSD/OS PPP"),
+#endif
+#ifdef DLT_ATM_CLIP
+ DLT_CHOICE(DLT_ATM_CLIP, "Linux Classical IP-over-ATM"),
+#endif
+#ifdef DLT_PPP_SERIAL
+ DLT_CHOICE(DLT_PPP_SERIAL, "PPP over serial"),
+#endif
+#ifdef DLT_PPP_ETHER
+ DLT_CHOICE(DLT_PPP_ETHER, "PPPoE"),
+#endif
+#ifdef DLT_C_HDLC
+ DLT_CHOICE(DLT_C_HDLC, "Cisco HDLC"),
+#endif
+#ifdef DLT_IEEE802_11
+ DLT_CHOICE(DLT_IEEE802_11, "802.11"),
+#endif
+#ifdef DLT_FRELAY
+ DLT_CHOICE(DLT_FRELAY, "Frame Relay"),
+#endif
+#ifdef DLT_LOOP
+ DLT_CHOICE(DLT_LOOP, "OpenBSD loopback"),
+#endif
+#ifdef DLT_ENC
+ DLT_CHOICE(DLT_ENC, "OpenBSD encapsulated IP"),
+#endif
+#ifdef DLT_LINUX_SLL
+ DLT_CHOICE(DLT_LINUX_SLL, "Linux cooked"),
+#endif
+#ifdef DLT_LTALK
+ DLT_CHOICE(DLT_LTALK, "Localtalk"),
+#endif
+#ifdef DLT_PFLOG
+ DLT_CHOICE(DLT_PFLOG, "OpenBSD pflog file"),
+#endif
+#ifdef DLT_PRISM_HEADER
+ DLT_CHOICE(DLT_PRISM_HEADER, "802.11 plus Prism header"),
+#endif
+#ifdef DLT_IP_OVER_FC
+ DLT_CHOICE(DLT_IP_OVER_FC, "RFC 2625 IP-over-Fibre Channel"),
+#endif
+#ifdef DLT_SUNATM
+ DLT_CHOICE(DLT_SUNATM, "Sun raw ATM"),
+#endif
+#ifdef DLT_IEEE802_11_RADIO
+ DLT_CHOICE(DLT_IEEE802_11_RADIO, "802.11 plus radio information header"),
+#endif
+#ifdef DLT_ARCNET_LINUX
+ DLT_CHOICE(DLT_ARCNET_LINUX, "Linux ARCNET"),
+#endif
+#ifdef DLT_LINUX_IRDA
+ DLT_CHOICE(DLT_LINUX_IRDA, "Linux IrDA"),
+#endif
+#ifdef DLT_LINUX_LAPD
+ DLT_CHOICE(DLT_LINUX_LAPD, "Linux vISDN LAPD"),
+#endif
+#ifdef DLT_LANE8023
+ DLT_CHOICE(DLT_LANE8023, "Linux 802.3 LANE"),
+#endif
+#ifdef DLT_CIP
+ DLT_CHOICE(DLT_CIP, "Linux Classical IP-over-ATM"),
+#endif
+#ifdef DLT_HDLC
+ DLT_CHOICE(DLT_HDLC, "Cisco HDLC"),
+#endif
+#ifdef DLT_PPI
+ DLT_CHOICE(DLT_PPI, "Per-Packet Information"),
+#endif
+ DLT_CHOICE_SENTINEL
+};
+#endif /* defined(HAVE_PCAP_DATALINK_NAME_TO_VAL) || defined(HAVE_PCAP_DATALINK_VAL_TO_NAME) || defined(HAVE_PCAP_DATALINK_VAL_TO_DESCRIPTION */
+
+#ifdef HAVE_PCAP_DATALINK_NAME_TO_VAL
+int
+pcap_datalink_name_to_val(const char *name)
+{
+ int i;
+
+ g_assert(has_wpcap);
+
+ if (p_pcap_datalink_name_to_val != NULL)
+ return p_pcap_datalink_name_to_val(name);
+ else {
+ /*
+ * We don't have it in WinPcap; do it ourselves.
+ */
+ for (i = 0; dlt_choices[i].name != NULL; i++) {
+ if (g_ascii_strcasecmp(dlt_choices[i].name + sizeof("DLT_") - 1,
+ name) == 0)
+ return dlt_choices[i].dlt;
+ }
+ return -1;
+ }
+}
+#endif
+
+#ifdef HAVE_PCAP_LIST_DATALINKS
+int
+pcap_list_datalinks(pcap_t *p, int **ddlt)
+{
+ g_assert(has_wpcap);
+ return p_pcap_list_datalinks(p, ddlt);
+}
+#endif
+
+#ifdef HAVE_PCAP_FREE_DATALINKS
+void
+pcap_free_datalinks(int *ddlt)
+{
+ g_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
+
+#ifdef HAVE_PCAP_DATALINK_VAL_TO_NAME
+const char *
+pcap_datalink_val_to_name(int dlt)
+{
+ int i;
+
+ g_assert(has_wpcap);
+
+ if (p_pcap_datalink_val_to_name != NULL)
+ return p_pcap_datalink_val_to_name(dlt);
+ else {
+ /*
+ * We don't have it in WinPcap; do it ourselves.
+ */
+ for (i = 0; dlt_choices[i].name != NULL; i++) {
+ if (dlt_choices[i].dlt == dlt)
+ return dlt_choices[i].name + sizeof("DLT_") - 1;
+ }
+ return NULL;
+ }
+}
+#endif
+
+#ifdef HAVE_PCAP_DATALINK_VAL_TO_DESCRIPTION
+const char *
+pcap_datalink_val_to_description(int dlt)
+{
+ int i;
+
+ g_assert(has_wpcap);
+
+ if (p_pcap_datalink_val_to_description != NULL)
+ return p_pcap_datalink_val_to_description(dlt);
+ else {
+ /*
+ * We don't have it in WinPcap; do it ourselves.
+ */
+ for (i = 0; dlt_choices[i].name != NULL; i++) {
+ if (dlt_choices[i].dlt == dlt)
+ return (dlt_choices[i].description);
+ }
+ return NULL;
+ }
+}
+#endif
+
+#ifdef HAVE_PCAP_BREAKLOOP
+void pcap_breakloop(pcap_t *a)
+{
+ p_pcap_breakloop(a);
+}
+#endif
+
+/* setbuff is win32 specific! */
+int pcap_setbuff(pcap_t *a, int b)
+{
+ g_assert(has_wpcap);
+ return p_pcap_setbuff(a, b);
+}
+
+/* pcap_next_ex is available since libpcap 0.8 / WinPcap 3.0! */
+/* (if you get a declaration warning here, try to update to at least WinPcap 3.1b4 develpack) */
+int pcap_next_ex (pcap_t *a, struct pcap_pkthdr **b, const u_char **c)
+{
+ g_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)
+{
+ struct pcap_rmtauth auth;
+ char source[PCAP_BUF_SIZE];
+ char errbuf[PCAP_ERRBUF_SIZE];
+ GList *result;
+
+ if (pcap_createsrcstr(source, PCAP_SRC_IFREMOTE, hostname, port,
+ NULL, errbuf) == -1) {
+ *err = CANT_GET_INTERFACE_LIST;
+ if (err_str != NULL)
+ *err_str = cant_get_if_list_error_message(errbuf);
+ return NULL;
+ }
+
+ auth.type = auth_type;
+ auth.username = g_strdup(username);
+ auth.password = g_strdup(passwd);
+
+ result = get_interface_list_findalldevs_ex(source, &auth, err, err_str);
+ g_free(auth.username);
+ g_free(auth.password);
+
+ return result;
+}
+#endif
+
+/*
+ * This will use "pcap_findalldevs()" if we have it, otherwise it'll
+ * fall back on "pcap_lookupdev()".
+ */
+GList *
+get_interface_list(int *err, char **err_str)
+{
+ GList *il = NULL;
+ wchar_t *names;
+ char *win95names;
+ char ascii_name[MAX_WIN_IF_NAME_LEN + 1];
+ char ascii_desc[MAX_WIN_IF_NAME_LEN + 1];
+ int i, j;
+ char errbuf[PCAP_ERRBUF_SIZE];
+
+ if (!has_wpcap) {
+ /*
+ * We don't have WinPcap, so we can't get a list of
+ * interfaces.
+ */
+ *err = DONT_HAVE_PCAP;
+ *err_str = cant_load_winpcap_err("you");
+ return NULL;
+ }
+
+#ifdef HAVE_PCAP_FINDALLDEVS
+ if (p_pcap_findalldevs != NULL)
+ return get_interface_list_findalldevs(err, err_str);
+#endif
+
+ /*
+ * In WinPcap, pcap_lookupdev is implemented by calling
+ * PacketGetAdapterNames. According to the documentation
+ * I could find:
+ *
+ * http://www.winpcap.org/docs/man/html/Packet32_8c.html#a43
+ *
+ * this means that:
+ *
+ * On Windows OT (95, 98, Me), pcap_lookupdev returns a sequence
+ * of bytes consisting of:
+ *
+ * a sequence of null-terminated ASCII strings (i.e., each
+ * one is terminated by a single 0 byte), giving the names
+ * of the interfaces;
+ *
+ * an empty ASCII string (i.e., a single 0 byte);
+ *
+ * a sequence of null-terminated ASCII strings, giving the
+ * descriptions of the interfaces;
+ *
+ * an empty ASCII string.
+ *
+ * On Windows NT (NT 4.0, W2K, WXP, W2K3, etc.), pcap_lookupdev
+ * returns a sequence of bytes consisting of:
+ *
+ * a sequence of null-terminated double-byte Unicode strings
+ * (i.e., each one consits of a sequence of double-byte
+ * characters, terminated by a double-byte 0), giving the
+ * names of the interfaces;
+ *
+ * an empty Unicode string (i.e., a double 0 byte);
+ *
+ * a sequence of null-terminated ASCII strings, giving the
+ * descriptions of the interfaces;
+ *
+ * an empty ASCII string.
+ *
+ * The Nth string in the first sequence is the name of the Nth
+ * adapter; the Nth string in the second sequence is the
+ * description of the Nth adapter.
+ */
+
+ names = (wchar_t *)pcap_lookupdev(errbuf);
+ i = 0;
+
+ if (names) {
+ char* desc = 0;
+ int desc_pos = 0;
+
+ if (names[0]<256) {
+ /*
+ * If names[0] is less than 256 it means the first
+ * byte is 0. This implies that we are using Unicode
+ * characters.
+ */
+ while (*(names+desc_pos) || *(names+desc_pos-1))
+ desc_pos++;
+ desc_pos++; /* Step over the extra '\0' */
+ desc = (char*)(names + desc_pos); /* cast *after* addition */
+
+ while (names[i] != 0) {
+ /*
+ * Copy the Unicode description to an ASCII
+ * string.
+ */
+ j = 0;
+ while (*desc != 0) {
+ if (j < MAX_WIN_IF_NAME_LEN)
+ ascii_desc[j++] = *desc;
+ desc++;
+ }
+ ascii_desc[j] = '\0';
+ desc++;
+
+ /*
+ * Copy the Unicode name to an ASCII string.
+ */
+ j = 0;
+ while (names[i] != 0) {
+ if (j < MAX_WIN_IF_NAME_LEN)
+ ascii_name[j++] = (char) names[i++];
+ }
+ ascii_name[j] = '\0';
+ i++;
+ il = g_list_append(il,
+ if_info_new(ascii_name, ascii_desc, FALSE));
+ }
+ } else {
+ /*
+ * Otherwise we are in Windows 95/98 and using ASCII
+ * (8-bit) characters.
+ */
+ win95names=(char *)names;
+ while (*(win95names+desc_pos) || *(win95names+desc_pos-1))
+ desc_pos++;
+ desc_pos++; /* Step over the extra '\0' */
+ desc = win95names + desc_pos;
+
+ while (win95names[i] != '\0') {
+ /*
+ * "&win95names[i]" points to the current
+ * interface name, and "desc" points to
+ * that interface's description.
+ */
+ il = g_list_append(il,
+ if_info_new(&win95names[i], desc, FALSE));
+
+ /*
+ * Skip to the next description.
+ */
+ while (*desc != 0)
+ desc++;
+ desc++;
+
+ /*
+ * Skip to the next name.
+ */
+ while (win95names[i] != 0)
+ i++;
+ i++;
+ }
+ }
+ }
+
+ if (il == NULL) {
+ /*
+ * No interfaces found.
+ */
+ *err = NO_INTERFACES_FOUND;
+ if (err_str != NULL)
+ *err_str = NULL;
+ }
+
+ return il;
+}
+
+/*
+ * Get an error message string for a CANT_GET_INTERFACE_LIST error from
+ * "get_interface_list()".
+ */
+gchar *
+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 g_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"
+"a later version of WinPcap - see the WinPcap site at www.winpcap.org",
+ err_str);
+ }
+ return g_strdup_printf("Can't get list of interfaces: %s", err_str);
+}
+
+/*
+ * Append the version of WinPcap with which we were compiled to a GString.
+ */
+void
+get_compiled_pcap_version(GString *str)
+{
+ g_string_append(str, "with WinPcap (" G_STRINGIFY(WINPCAP_VERSION) ")");
+}
+
+/*
+ * Append the version of WinPcap with which we we're running to a GString.
+ */
+void
+get_runtime_pcap_version(GString *str)
+{
+ /*
+ * On Windows, we might have been compiled with WinPcap but
+ * might not have it loaded; indicate whether we have it or
+ * not and, if we have it and we have "pcap_lib_version()",
+ * what version we have.
+ */
+ GModule *handle; /* handle returned by ws_module_open */
+ static gchar *packetVer;
+ gchar *blankp;
+
+ if (has_wpcap) {
+ g_string_append_printf(str, "with ");
+ if (p_pcap_lib_version != NULL)
+ g_string_append_printf(str, p_pcap_lib_version());
+ else {
+ /*
+ * An alternative method of obtaining the version
+ * number, by using the PacketLibraryVersion
+ * string from packet.dll.
+ *
+ * Unfortunately, in WinPcap 3.0, it returns
+ * "3.0 alpha3", even in the final version of
+ * WinPcap 3.0, so if there's a blank in the
+ * string, we strip it and everything after
+ * it from the string, so we don't misleadingly
+ * report that 3.0 alpha3 is being used when
+ * the final version is being used.
+ */
+ if (packetVer == NULL) {
+ packetVer = "version unknown";
+ handle = ws_module_open("packet.dll", 0);
+ if (handle != NULL) {
+ if (g_module_symbol(handle,
+ "PacketLibraryVersion",
+ (gpointer*)&packetVer)) {
+ packetVer = g_strdup(packetVer);
+ blankp = strchr(packetVer, ' ');
+ if (blankp != NULL)
+ *blankp = '\0';
+ } else {
+ packetVer = "version unknown";
+ }
+ g_module_close(handle);
+ }
+ }
+ g_string_append_printf(str, "WinPcap (%s)", packetVer);
+ }
+ } else
+ g_string_append(str, "without WinPcap");
+}
+
+#else /* HAVE_LIBPCAP */
+
+void
+load_wpcap(void)
+{
+ return;
+}
+
+/*
+ * Append an indication that we were not compiled with WinPcap
+ * to a GString.
+ */
+void
+get_compiled_pcap_version(GString *str)
+{
+ g_string_append(str, "without WinPcap");
+}
+
+/*
+ * Don't append anything, as we weren't even compiled to use WinPcap.
+ */
+void
+get_runtime_pcap_version(GString *str _U_)
+{
+}
+
+#endif /* HAVE_LIBPCAP */
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-24 22:09:53 +0000