2 * WinPcap-specific interfaces for capturing. We load WinPcap at run
3 * time, so that we only need one Wireshark binary and one TShark binary
4 * for Windows, regardless of whether WinPcap is installed or not.
8 * Wireshark - Network traffic analyzer
9 * By Gerald Combs <gerald@wireshark.org>
10 * Copyright 2001 Gerald Combs
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
33 #include <epan/strutil.h>
35 #include "capture_ifinfo.h"
36 #include "capture-pcap-util.h"
37 #include "capture-pcap-util-int.h"
38 #include "capture-wpcap.h"
40 #include <wsutil/file_util.h>
42 /* XXX - yes, I know, I should move cppmagic.h to a generic location. */
43 #include "tools/lemon/cppmagic.h"
45 #define MAX_WIN_IF_NAME_LEN 511
48 gboolean has_wpcap = FALSE;
53 * XXX - should we require at least WinPcap 3.1 both for building an
54 * for using Wireshark?
57 static char* (*p_pcap_lookupdev) (char *);
58 static void (*p_pcap_close) (pcap_t *);
59 static int (*p_pcap_stats) (pcap_t *, struct pcap_stat *);
60 static int (*p_pcap_dispatch) (pcap_t *, int, pcap_handler, guchar *);
61 static int (*p_pcap_snapshot) (pcap_t *);
62 static int (*p_pcap_datalink) (pcap_t *);
63 static int (*p_pcap_setfilter) (pcap_t *, struct bpf_program *);
64 static char* (*p_pcap_geterr) (pcap_t *);
65 static int (*p_pcap_compile) (pcap_t *, struct bpf_program *, const char *, int,
67 static int (*p_pcap_compile_nopcap) (int, int, struct bpf_program *, const char *, int,
69 static int (*p_pcap_lookupnet) (const char *, bpf_u_int32 *, bpf_u_int32 *,
71 static pcap_t* (*p_pcap_open_live) (const char *, int, int, int, char *);
72 static int (*p_pcap_loop) (pcap_t *, int, pcap_handler, guchar *);
73 #ifdef HAVE_PCAP_OPEN_DEAD
74 static pcap_t* (*p_pcap_open_dead) (int, int);
76 static void (*p_pcap_freecode) (struct bpf_program *);
77 #ifdef HAVE_PCAP_FINDALLDEVS
78 static int (*p_pcap_findalldevs) (pcap_if_t **, char *);
79 static void (*p_pcap_freealldevs) (pcap_if_t *);
81 #ifdef HAVE_PCAP_DATALINK_NAME_TO_VAL
82 static int (*p_pcap_datalink_name_to_val) (const char *);
84 #ifdef HAVE_PCAP_DATALINK_VAL_TO_NAME
85 static const char *(*p_pcap_datalink_val_to_name) (int);
87 #ifdef HAVE_PCAP_DATALINK_VAL_TO_DESCRIPTION
88 static const char *(*p_pcap_datalink_val_to_description) (int);
90 #ifdef HAVE_PCAP_BREAKLOOP
91 static void (*p_pcap_breakloop) (pcap_t *);
93 static const char *(*p_pcap_lib_version) (void);
94 static int (*p_pcap_setbuff) (pcap_t *, int dim);
95 static int (*p_pcap_next_ex) (pcap_t *, struct pcap_pkthdr **pkt_header, const u_char **pkt_data);
96 #ifdef HAVE_PCAP_REMOTE
97 static pcap_t* (*p_pcap_open) (const char *, int, int, int,
98 struct pcap_rmtauth *, char *);
99 static int (*p_pcap_findalldevs_ex) (char *, struct pcap_rmtauth *,
100 pcap_if_t **, char *);
101 static int (*p_pcap_createsrcstr) (char *, int, const char *, const char *,
102 const char *, char *);
104 #ifdef HAVE_PCAP_SETSAMPLING
105 static struct pcap_samp* (*p_pcap_setsampling)(pcap_t *);
108 #ifdef HAVE_PCAP_LIST_DATALINKS
109 static int (*p_pcap_list_datalinks)(pcap_t *, int **);
112 #ifdef HAVE_PCAP_SET_DATALINK
113 static int (*p_pcap_set_datalink)(pcap_t *, int);
116 #ifdef HAVE_PCAP_FREE_DATALINKS
117 static int (*p_pcap_free_datalinks)(int *);
120 #ifdef HAVE_BPF_IMAGE
121 static char *(*p_bpf_image) (const struct bpf_insn *, int);
130 #define SYM(x, y) { STRINGIFY(x) , (gpointer) &CONCAT(p_,x), y }
136 /* These are the symbols I need or want from Wpcap */
137 static const symbol_table_t symbols[] = {
138 SYM(pcap_lookupdev, FALSE),
139 SYM(pcap_close, FALSE),
140 SYM(pcap_stats, FALSE),
141 SYM(pcap_dispatch, FALSE),
142 SYM(pcap_snapshot, FALSE),
143 SYM(pcap_datalink, FALSE),
144 SYM(pcap_setfilter, FALSE),
145 SYM(pcap_geterr, FALSE),
146 SYM(pcap_compile, FALSE),
147 SYM(pcap_compile_nopcap, FALSE),
148 SYM(pcap_lookupnet, FALSE),
149 #ifdef HAVE_PCAP_REMOTE
150 SYM(pcap_open, FALSE),
151 SYM(pcap_findalldevs_ex, FALSE),
152 SYM(pcap_createsrcstr, FALSE),
154 SYM(pcap_open_live, FALSE),
155 #ifdef HAVE_PCAP_OPEN_DEAD
156 SYM(pcap_open_dead, FALSE),
158 #ifdef HAVE_PCAP_SETSAMPLING
159 SYM(pcap_setsampling, TRUE),
161 SYM(pcap_loop, FALSE),
162 SYM(pcap_freecode, TRUE),
163 #ifdef HAVE_PCAP_FINDALLDEVS
164 SYM(pcap_findalldevs, TRUE),
165 SYM(pcap_freealldevs, TRUE),
167 #ifdef HAVE_PCAP_DATALINK_NAME_TO_VAL
168 SYM(pcap_datalink_name_to_val, TRUE),
170 #ifdef HAVE_PCAP_DATALINK_VAL_TO_NAME
171 SYM(pcap_datalink_val_to_name, TRUE),
173 #ifdef HAVE_PCAP_DATALINK_VAL_TO_DESCRIPTION
174 SYM(pcap_datalink_val_to_description, TRUE),
176 #ifdef HAVE_PCAP_BREAKLOOP
178 * We don't try to work around the lack of this at
179 * run time; it's present in WinPcap 3.1, which is
180 * the version we build with and ship with.
182 SYM(pcap_breakloop, FALSE),
184 SYM(pcap_lib_version, TRUE),
185 SYM(pcap_setbuff, TRUE),
186 SYM(pcap_next_ex, TRUE),
187 #ifdef HAVE_PCAP_LIST_DATALINKS
188 SYM(pcap_list_datalinks, FALSE),
190 #ifdef HAVE_PCAP_SET_DATALINK
191 SYM(pcap_set_datalink, FALSE),
193 #ifdef HAVE_PCAP_FREE_DATALINKS
194 SYM(pcap_free_datalinks, TRUE),
196 #ifdef HAVE_BPF_IMAGE
197 SYM(bpf_image, FALSE),
199 { NULL, NULL, FALSE }
202 GModule *wh; /* wpcap handle */
203 const symbol_table_t *sym;
205 wh = ws_module_open("wpcap.dll", 0);
213 if (!g_module_symbol(wh, sym->name, sym->ptr)) {
216 * We don't care if it's missing; we just
222 * We require this symbol.
235 * The official list of WinPcap mirrors is at
236 * http://www.winpcap.org/misc/mirrors.htm
239 cant_load_winpcap_err(const char *app_name)
241 return g_strdup_printf(
242 "Unable to load WinPcap (wpcap.dll); %s will not be able to capture\n"
245 "In order to capture packets, WinPcap must be installed; see\n"
247 " http://www.winpcap.org/\n"
251 " http://www.mirrors.wiretapped.net/security/packet-capture/winpcap/\n"
255 " http://winpcap.cs.pu.edu.tw/\n"
257 "for a downloadable version of WinPcap and for instructions on how to install\n"
263 pcap_lookupdev (char *a)
268 return p_pcap_lookupdev(a);
272 pcap_close(pcap_t *a)
279 pcap_stats(pcap_t *a, struct pcap_stat *b)
282 return p_pcap_stats(a, b);
286 pcap_dispatch(pcap_t *a, int b, pcap_handler c, guchar *d)
289 return p_pcap_dispatch(a, b, c, d);
293 pcap_snapshot(pcap_t *a)
296 return p_pcap_snapshot(a);
300 pcap_datalink(pcap_t *a)
303 return p_pcap_datalink(a);
306 #ifdef HAVE_PCAP_SET_DATALINK
308 pcap_set_datalink(pcap_t *p, int dlt)
311 return p_pcap_set_datalink(p, dlt);
316 pcap_setfilter(pcap_t *a, struct bpf_program *b)
319 return p_pcap_setfilter(a, b);
323 pcap_geterr(pcap_t *a)
326 return p_pcap_geterr(a);
330 pcap_compile(pcap_t *a, struct bpf_program *b, const char *c, int d,
334 return p_pcap_compile(a, b, c, d, e);
338 pcap_compile_nopcap(int a, int b, struct bpf_program *c, const char *d, int e,
342 return p_pcap_compile_nopcap(a, b, c, d, e, f);
346 pcap_lookupnet(const char *a, bpf_u_int32 *b, bpf_u_int32 *c, char *d)
349 return p_pcap_lookupnet(a, b, c, d);
353 pcap_open_live(const char *a, int b, int c, int d, char *e)
356 g_snprintf(e, PCAP_ERRBUF_SIZE,
357 "unable to load WinPcap (wpcap.dll); can't open %s to capture",
361 return p_pcap_open_live(a, b, c, d, e);
364 #ifdef HAVE_PCAP_OPEN_DEAD
366 pcap_open_dead(int a, int b)
371 return p_pcap_open_dead(a, b);
375 #ifdef HAVE_BPF_IMAGE
377 bpf_image(const struct bpf_insn *a, int b)
382 return p_bpf_image(a, b);
386 #ifdef HAVE_PCAP_REMOTE
388 pcap_open(const char *a, int b, int c, int d, struct pcap_rmtauth *e, char *f)
391 g_snprintf(f, PCAP_ERRBUF_SIZE,
392 "unable to load WinPcap (wpcap.dll); can't open %s to capture",
396 return p_pcap_open(a, b, c, d, e, f);
400 pcap_findalldevs_ex(char *a, struct pcap_rmtauth *b, pcap_if_t **c, char *d)
403 return p_pcap_findalldevs_ex(a, b, c, d);
407 pcap_createsrcstr(char *a, int b, const char *c, const char *d, const char *e,
411 return p_pcap_createsrcstr(a, b, c, d, e, f);
415 #ifdef HAVE_PCAP_SETSAMPLING
417 pcap_setsampling(pcap_t *a)
420 if (p_pcap_setsampling != NULL) {
421 return p_pcap_setsampling(a);
428 pcap_loop(pcap_t *a, int b, pcap_handler c, guchar *d)
431 return p_pcap_loop(a, b, c, d);
435 pcap_freecode(struct bpf_program *a)
438 if(p_pcap_freecode) {
443 #ifdef HAVE_PCAP_FINDALLDEVS
445 pcap_findalldevs(pcap_if_t **a, char *b)
447 g_assert(has_wpcap && p_pcap_findalldevs != NULL);
448 return p_pcap_findalldevs(a, b);
452 pcap_freealldevs(pcap_if_t *a)
454 g_assert(has_wpcap && p_pcap_freealldevs != NULL);
455 p_pcap_freealldevs(a);
459 #if defined(HAVE_PCAP_DATALINK_NAME_TO_VAL) || defined(HAVE_PCAP_DATALINK_VAL_TO_NAME) || defined(HAVE_PCAP_DATALINK_VAL_TO_DESCRIPTION)
461 * Table of DLT_ types, names, and descriptions, for use if the version
462 * of WinPcap we have installed lacks "pcap_datalink_name_to_val()"
463 * or "pcap_datalink_val_to_name()".
467 const char *description;
471 #define DLT_CHOICE(code, description) { #code, description, code }
472 #define DLT_CHOICE_SENTINEL { NULL, NULL, 0 }
474 static struct dlt_choice dlt_choices[] = {
475 DLT_CHOICE(DLT_NULL, "BSD loopback"),
476 DLT_CHOICE(DLT_EN10MB, "Ethernet"),
477 DLT_CHOICE(DLT_IEEE802, "Token ring"),
478 DLT_CHOICE(DLT_ARCNET, "ARCNET"),
479 DLT_CHOICE(DLT_SLIP, "SLIP"),
480 DLT_CHOICE(DLT_PPP, "PPP"),
481 DLT_CHOICE(DLT_FDDI, "FDDI"),
482 DLT_CHOICE(DLT_ATM_RFC1483, "RFC 1483 IP-over-ATM"),
483 DLT_CHOICE(DLT_RAW, "Raw IP"),
484 #ifdef DLT_SLIP_BSDOS
485 DLT_CHOICE(DLT_SLIP_BSDOS, "BSD/OS SLIP"),
488 DLT_CHOICE(DLT_PPP_BSDOS, "BSD/OS PPP"),
491 DLT_CHOICE(DLT_ATM_CLIP, "Linux Classical IP-over-ATM"),
493 #ifdef DLT_PPP_SERIAL
494 DLT_CHOICE(DLT_PPP_SERIAL, "PPP over serial"),
497 DLT_CHOICE(DLT_PPP_ETHER, "PPPoE"),
500 DLT_CHOICE(DLT_C_HDLC, "Cisco HDLC"),
502 #ifdef DLT_IEEE802_11
503 DLT_CHOICE(DLT_IEEE802_11, "802.11"),
506 DLT_CHOICE(DLT_FRELAY, "Frame Relay"),
509 DLT_CHOICE(DLT_LOOP, "OpenBSD loopback"),
512 DLT_CHOICE(DLT_ENC, "OpenBSD encapsulated IP"),
515 DLT_CHOICE(DLT_LINUX_SLL, "Linux cooked"),
518 DLT_CHOICE(DLT_LTALK, "Localtalk"),
521 DLT_CHOICE(DLT_PFLOG, "OpenBSD pflog file"),
523 #ifdef DLT_PRISM_HEADER
524 DLT_CHOICE(DLT_PRISM_HEADER, "802.11 plus Prism header"),
526 #ifdef DLT_IP_OVER_FC
527 DLT_CHOICE(DLT_IP_OVER_FC, "RFC 2625 IP-over-Fibre Channel"),
530 DLT_CHOICE(DLT_SUNATM, "Sun raw ATM"),
532 #ifdef DLT_IEEE802_11_RADIO
533 DLT_CHOICE(DLT_IEEE802_11_RADIO, "802.11 plus radio information header"),
535 #ifdef DLT_ARCNET_LINUX
536 DLT_CHOICE(DLT_ARCNET_LINUX, "Linux ARCNET"),
538 #ifdef DLT_LINUX_IRDA
539 DLT_CHOICE(DLT_LINUX_IRDA, "Linux IrDA"),
541 #ifdef DLT_LINUX_LAPD
542 DLT_CHOICE(DLT_LINUX_LAPD, "Linux vISDN LAPD"),
545 DLT_CHOICE(DLT_LANE8023, "Linux 802.3 LANE"),
548 DLT_CHOICE(DLT_CIP, "Linux Classical IP-over-ATM"),
551 DLT_CHOICE(DLT_HDLC, "Cisco HDLC"),
554 DLT_CHOICE(DLT_PPI, "Per-Packet Information"),
558 #endif /* defined(HAVE_PCAP_DATALINK_NAME_TO_VAL) || defined(HAVE_PCAP_DATALINK_VAL_TO_NAME) || defined(HAVE_PCAP_DATALINK_VAL_TO_DESCRIPTION */
560 #ifdef HAVE_PCAP_DATALINK_NAME_TO_VAL
562 pcap_datalink_name_to_val(const char *name)
568 if (p_pcap_datalink_name_to_val != NULL)
569 return p_pcap_datalink_name_to_val(name);
572 * We don't have it in WinPcap; do it ourselves.
574 for (i = 0; dlt_choices[i].name != NULL; i++) {
575 if (g_ascii_strcasecmp(dlt_choices[i].name + sizeof("DLT_") - 1,
577 return dlt_choices[i].dlt;
584 #ifdef HAVE_PCAP_LIST_DATALINKS
586 pcap_list_datalinks(pcap_t *p, int **ddlt)
589 return p_pcap_list_datalinks(p, ddlt);
593 #ifdef HAVE_PCAP_FREE_DATALINKS
595 pcap_free_datalinks(int *ddlt)
600 * If we don't have pcap_free_datalinks() in WinPcap,
601 * we don't free the memory - we can't use free(), as
602 * we might not have been built with the same version
603 * of the C runtime library as WinPcap was, and, if we're
604 * not, free() isn't guaranteed to work on something
605 * allocated by WinPcap.
607 if (p_pcap_free_datalinks != NULL)
608 p_pcap_free_datalinks(ddlt);
612 #ifdef HAVE_PCAP_DATALINK_VAL_TO_NAME
614 pcap_datalink_val_to_name(int dlt)
620 if (p_pcap_datalink_val_to_name != NULL)
621 return p_pcap_datalink_val_to_name(dlt);
624 * We don't have it in WinPcap; do it ourselves.
626 for (i = 0; dlt_choices[i].name != NULL; i++) {
627 if (dlt_choices[i].dlt == dlt)
628 return dlt_choices[i].name + sizeof("DLT_") - 1;
635 #ifdef HAVE_PCAP_DATALINK_VAL_TO_DESCRIPTION
637 pcap_datalink_val_to_description(int dlt)
643 if (p_pcap_datalink_val_to_description != NULL)
644 return p_pcap_datalink_val_to_description(dlt);
647 * We don't have it in WinPcap; do it ourselves.
649 for (i = 0; dlt_choices[i].name != NULL; i++) {
650 if (dlt_choices[i].dlt == dlt)
651 return (dlt_choices[i].description);
658 #ifdef HAVE_PCAP_BREAKLOOP
659 void pcap_breakloop(pcap_t *a)
665 /* setbuff is win32 specific! */
666 int pcap_setbuff(pcap_t *a, int b)
669 return p_pcap_setbuff(a, b);
672 /* pcap_next_ex is available since libpcap 0.8 / WinPcap 3.0! */
673 /* (if you get a declaration warning here, try to update to at least WinPcap 3.1b4 develpack) */
674 int pcap_next_ex (pcap_t *a, struct pcap_pkthdr **b, const u_char **c)
677 return p_pcap_next_ex(a, b, c);
680 #ifdef HAVE_PCAP_REMOTE
682 get_remote_interface_list(const char *hostname, const char *port,
683 int auth_type, const char *username,
684 const char *passwd, int *err, char **err_str)
686 struct pcap_rmtauth auth;
687 char source[PCAP_BUF_SIZE];
688 char errbuf[PCAP_ERRBUF_SIZE];
691 if (pcap_createsrcstr(source, PCAP_SRC_IFREMOTE, hostname, port,
692 NULL, errbuf) == -1) {
693 *err = CANT_GET_INTERFACE_LIST;
695 *err_str = cant_get_if_list_error_message(errbuf);
699 auth.type = auth_type;
700 auth.username = g_strdup(username);
701 auth.password = g_strdup(passwd);
703 result = get_interface_list_findalldevs_ex(source, &auth, err, err_str);
704 g_free(auth.username);
705 g_free(auth.password);
712 * This will use "pcap_findalldevs()" if we have it, otherwise it'll
713 * fall back on "pcap_lookupdev()".
716 get_interface_list(int *err, char **err_str)
721 char ascii_name[MAX_WIN_IF_NAME_LEN + 1];
722 char ascii_desc[MAX_WIN_IF_NAME_LEN + 1];
724 char errbuf[PCAP_ERRBUF_SIZE];
728 * We don't have WinPcap, so we can't get a list of
731 *err = DONT_HAVE_PCAP;
732 *err_str = cant_load_winpcap_err("you");
736 #ifdef HAVE_PCAP_FINDALLDEVS
737 if (p_pcap_findalldevs != NULL)
738 return get_interface_list_findalldevs(err, err_str);
742 * In WinPcap, pcap_lookupdev is implemented by calling
743 * PacketGetAdapterNames. According to the documentation
746 * http://www.winpcap.org/docs/man/html/Packet32_8c.html#a43
750 * On Windows OT (95, 98, Me), pcap_lookupdev returns a sequence
751 * of bytes consisting of:
753 * a sequence of null-terminated ASCII strings (i.e., each
754 * one is terminated by a single 0 byte), giving the names
757 * an empty ASCII string (i.e., a single 0 byte);
759 * a sequence of null-terminated ASCII strings, giving the
760 * descriptions of the interfaces;
762 * an empty ASCII string.
764 * On Windows NT (NT 4.0, W2K, WXP, W2K3, etc.), pcap_lookupdev
765 * returns a sequence of bytes consisting of:
767 * a sequence of null-terminated double-byte Unicode strings
768 * (i.e., each one consits of a sequence of double-byte
769 * characters, terminated by a double-byte 0), giving the
770 * names of the interfaces;
772 * an empty Unicode string (i.e., a double 0 byte);
774 * a sequence of null-terminated ASCII strings, giving the
775 * descriptions of the interfaces;
777 * an empty ASCII string.
779 * The Nth string in the first sequence is the name of the Nth
780 * adapter; the Nth string in the second sequence is the
781 * description of the Nth adapter.
784 names = (wchar_t *)pcap_lookupdev(errbuf);
793 * If names[0] is less than 256 it means the first
794 * byte is 0. This implies that we are using Unicode
797 while (*(names+desc_pos) || *(names+desc_pos-1))
799 desc_pos++; /* Step over the extra '\0' */
800 desc = (char*)(names + desc_pos); /* cast *after* addition */
802 while (names[i] != 0) {
804 * Copy the Unicode description to an ASCII
809 if (j < MAX_WIN_IF_NAME_LEN)
810 ascii_desc[j++] = *desc;
813 ascii_desc[j] = '\0';
817 * Copy the Unicode name to an ASCII string.
820 while (names[i] != 0) {
821 if (j < MAX_WIN_IF_NAME_LEN)
822 ascii_name[j++] = (char) names[i++];
824 ascii_name[j] = '\0';
826 il = g_list_append(il,
827 if_info_new(ascii_name, ascii_desc, FALSE));
831 * Otherwise we are in Windows 95/98 and using ASCII
832 * (8-bit) characters.
834 win95names=(char *)names;
835 while (*(win95names+desc_pos) || *(win95names+desc_pos-1))
837 desc_pos++; /* Step over the extra '\0' */
838 desc = win95names + desc_pos;
840 while (win95names[i] != '\0') {
842 * "&win95names[i]" points to the current
843 * interface name, and "desc" points to
844 * that interface's description.
846 il = g_list_append(il,
847 if_info_new(&win95names[i], desc, FALSE));
850 * Skip to the next description.
857 * Skip to the next name.
859 while (win95names[i] != 0)
868 * No interfaces found.
870 *err = NO_INTERFACES_FOUND;
879 * Get an error message string for a CANT_GET_INTERFACE_LIST error from
880 * "get_interface_list()".
883 cant_get_if_list_error_message(const char *err_str)
886 * If the error message includes "Not enough storage is available
887 * to process this command" or "The operation completed successfully",
888 * suggest that they install a WinPcap version later than 3.0.
890 if (strstr(err_str, "Not enough storage is available to process this command") != NULL ||
891 strstr(err_str, "The operation completed successfully") != NULL) {
892 return g_strdup_printf("Can't get list of interfaces: %s\n"
893 "This might be a problem with WinPcap 3.0; you should try updating to\n"
894 "a later version of WinPcap - see the WinPcap site at www.winpcap.org",
897 return g_strdup_printf("Can't get list of interfaces: %s", err_str);
901 * Append the version of WinPcap with which we were compiled to a GString.
904 get_compiled_pcap_version(GString *str)
906 g_string_append(str, "with WinPcap (" STRINGIFY(PCAP_VERSION) ")");
910 * Append the version of WinPcap with which we we're running to a GString.
913 get_runtime_pcap_version(GString *str)
916 * On Windows, we might have been compiled with WinPcap but
917 * might not have it loaded; indicate whether we have it or
918 * not and, if we have it and we have "pcap_lib_version()",
919 * what version we have.
921 GModule *handle; /* handle returned by ws_module_open */
922 static gchar *packetVer;
926 g_string_append_printf(str, "with ");
927 if (p_pcap_lib_version != NULL)
928 g_string_append_printf(str, p_pcap_lib_version());
931 * An alternative method of obtaining the version
932 * number, by using the PacketLibraryVersion
933 * string from packet.dll.
935 * Unfortunately, in WinPcap 3.0, it returns
936 * "3.0 alpha3", even in the final version of
937 * WinPcap 3.0, so if there's a blank in the
938 * string, we strip it and everything after
939 * it from the string, so we don't misleadingly
940 * report that 3.0 alpha3 is being used when
941 * the final version is being used.
943 if (packetVer == NULL) {
944 packetVer = "version unknown";
945 handle = ws_module_open("packet.dll", 0);
946 if (handle != NULL) {
947 if (g_module_symbol(handle,
948 "PacketLibraryVersion",
949 (gpointer*)&packetVer)) {
950 packetVer = g_strdup(packetVer);
951 blankp = strchr(packetVer, ' ');
955 packetVer = "version unknown";
957 g_module_close(handle);
960 g_string_append_printf(str, "WinPcap (%s)", packetVer);
963 g_string_append(str, "without WinPcap");
966 #else /* HAVE_LIBPCAP */
975 * Append an indication that we were not compiled with WinPcap
979 get_compiled_pcap_version(GString *str)
981 g_string_append(str, "without WinPcap");
985 * Don't append anything, as we weren't even compiled to use WinPcap.
988 get_runtime_pcap_version(GString *str _U_)
992 #endif /* HAVE_LIBPCAP */