forked from osmocom/wireshark
206 lines
4.1 KiB
C
206 lines
4.1 KiB
C
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/* capture-wpcap.c
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* Try to load WinPcap DLL at run-time.
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*
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* $Id: capture-wpcap.c,v 1.1 2001/04/03 05:26:26 gram Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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* Copyright 2001 Gerald Combs
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <glib.h>
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#include <gmodule.h>
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#ifdef HAVE_LIBPCAP
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#include <pcap.h>
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#endif
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/* XXX - yes, I know, I should move cppmagic.h to a generic location. */
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#include "tools/lemon/cppmagic.h"
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gboolean has_wpcap = FALSE;
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#ifdef HAVE_LIBPCAP
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static char* (*p_pcap_lookupdev) (char *);
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static void (*p_pcap_close) (pcap_t *);
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static int (*p_pcap_stats) (pcap_t *, struct pcap_stat *);
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static int (*p_pcap_dispatch) (pcap_t *, int, pcap_handler, u_char *);
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static int (*p_pcap_snapshot) (pcap_t *);
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static int (*p_pcap_datalink) (pcap_t *);
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static int (*p_pcap_setfilter) (pcap_t *, struct bpf_program *);
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static char* (*p_pcap_geterr) (pcap_t *);
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static int (*p_pcap_compile) (pcap_t *, struct bpf_program *, char *, int,
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bpf_u_int32);
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static int (*p_pcap_lookupnet) (char *, bpf_u_int32 *, bpf_u_int32 *,
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char *);
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static pcap_t* (*p_pcap_open_live) (char *, int, int, int, char *);
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static int (*p_pcap_loop) (pcap_t *, int, pcap_handler, u_char *);
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typedef struct {
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const char *name;
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gpointer *ptr;
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} symbol_table_t;
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#define SYM(x) STRINGIFY(x) , (gpointer) &CONCAT(p_,x)
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void
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load_wpcap(void)
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{
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/* These are the symbols I need from Wpcap */
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symbol_table_t symbols[] = {
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SYM(pcap_lookupdev),
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SYM(pcap_close),
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SYM(pcap_stats),
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SYM(pcap_dispatch),
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SYM(pcap_snapshot),
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SYM(pcap_datalink),
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SYM(pcap_setfilter),
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SYM(pcap_geterr),
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SYM(pcap_compile),
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SYM(pcap_lookupnet),
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SYM(pcap_open_live),
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SYM(pcap_loop),
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NULL, NULL
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};
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GModule *wh; /* wpcap handle */
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symbol_table_t *sym;
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wh = g_module_open("wpcap", 0);
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if (!wh) {
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return;
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}
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sym = symbols;
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while (sym && sym->name) {
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if (!g_module_symbol(wh, sym->name, sym->ptr)) {
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return;
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}
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sym++;
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}
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has_wpcap = TRUE;
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}
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char*
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pcap_lookupdev (char *a)
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{
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g_assert(has_wpcap);
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return p_pcap_lookupdev(a);
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}
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void
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pcap_close(pcap_t *a)
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{
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g_assert(has_wpcap);
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p_pcap_close(a);
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}
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int
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pcap_stats(pcap_t *a, struct pcap_stat *b)
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{
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g_assert(has_wpcap);
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return p_pcap_stats(a, b);
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}
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int
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pcap_dispatch(pcap_t *a, int b, pcap_handler c, u_char *d)
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{
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g_assert(has_wpcap);
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return p_pcap_dispatch(a, b, c, d);
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}
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int
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pcap_snapshot(pcap_t *a)
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{
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g_assert(has_wpcap);
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return p_pcap_snapshot(a);
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}
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int
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pcap_datalink(pcap_t *a)
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{
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g_assert(has_wpcap);
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return p_pcap_datalink(a);
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}
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int
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pcap_setfilter(pcap_t *a, struct bpf_program *b)
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{
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g_assert(has_wpcap);
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return p_pcap_setfilter(a, b);
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}
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char*
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pcap_geterr(pcap_t *a)
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{
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g_assert(has_wpcap);
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return p_pcap_geterr(a);
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}
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int
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pcap_compile(pcap_t *a, struct bpf_program *b, char *c, int d,
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bpf_u_int32 e)
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{
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g_assert(has_wpcap);
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return p_pcap_compile(a, b, c, d, e);
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}
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int
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pcap_lookupnet(char *a, bpf_u_int32 *b, bpf_u_int32 *c, char *d)
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{
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g_assert(has_wpcap);
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return p_pcap_lookupnet(a, b, c, d);
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}
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pcap_t*
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pcap_open_live(char *a, int b, int c, int d, char *e)
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{
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g_assert(has_wpcap);
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return p_pcap_open_live(a, b, c, d, e);
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}
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int
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pcap_loop(pcap_t *a, int b, pcap_handler c, u_char *d)
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{
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g_assert(has_wpcap);
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return p_pcap_loop(a, b, c, d);
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}
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#else /* HAVE_LIBPCAP */
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void
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load_wpcap(void)
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{
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return;
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}
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#endif /* HAVE_LIBPCAP */
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