8756d0ad12
Change-Id: I3d6689738aee32bf720e6ebca1d4462429fdc1eb Reviewed-on: https://code.wireshark.org/review/27397 Petri-Dish: Dario Lombardo <lomato@gmail.com> Tested-by: Petri Dish Buildbot Reviewed-by: Roland Knall <rknall@gmail.com> Reviewed-by: Dario Lombardo <lomato@gmail.com>
387 lines
11 KiB
C
387 lines
11 KiB
C
/* extcap-base.c
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* Base function for extcaps
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*
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* Copyright 2015, Dario Lombardo
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include "extcap-base.h"
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <errno.h>
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#ifdef HAVE_GETOPT_H
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#include <getopt.h>
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#endif
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#ifndef HAVE_GETOPT_LONG
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#include "wsutil/wsgetopt.h"
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#endif
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#include "ws_attributes.h"
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enum extcap_options {
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EXTCAP_BASE_OPTIONS_ENUM
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};
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typedef struct _extcap_interface
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{
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char * interface;
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char * description;
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uint16_t dlt;
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char * dltname;
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char * dltdescription;
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} extcap_interface;
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typedef struct _extcap_option {
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char * optname;
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char * optdesc;
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} extcap_option_t;
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FILE* custom_log = NULL;
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#ifdef _WIN32
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BOOLEAN IsHandleRedirected(DWORD handle)
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{
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HANDLE h = GetStdHandle(handle);
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if (h) {
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BY_HANDLE_FILE_INFORMATION fi;
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if (GetFileInformationByHandle(h, &fi)) {
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return TRUE;
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}
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}
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return FALSE;
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}
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void attach_parent_console()
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{
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BOOL outRedirected, errRedirected;
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outRedirected = IsHandleRedirected(STD_OUTPUT_HANDLE);
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errRedirected = IsHandleRedirected(STD_ERROR_HANDLE);
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if (outRedirected && errRedirected) {
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/* Both standard output and error handles are redirected.
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* There is no point in attaching to parent process console.
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*/
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return;
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}
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if (AttachConsole(ATTACH_PARENT_PROCESS) == 0) {
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/* Console attach failed. */
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return;
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}
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/* Console attach succeeded */
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if (outRedirected == FALSE) {
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if (!freopen("CONOUT$", "w", stdout)) {
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g_warning("Cannot redirect to stdout.");
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}
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}
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if (errRedirected == FALSE) {
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if (!freopen("CONOUT$", "w", stderr)) {
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g_warning("Cannot redirect to strerr.");
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}
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}
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}
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#endif
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void extcap_base_register_interface(extcap_parameters * extcap, const char * interface, const char * ifdescription, uint16_t dlt, const char * dltdescription )
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{
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extcap_base_register_interface_ext(extcap, interface, ifdescription, dlt, NULL, dltdescription );
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}
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void extcap_base_register_interface_ext(extcap_parameters * extcap,
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const char * interface, const char * ifdescription,
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uint16_t dlt, const char * dltname, const char * dltdescription )
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{
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extcap_interface * iface;
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if (interface == NULL)
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return;
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iface = g_new0(extcap_interface, 1);
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iface->interface = g_strdup(interface);
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iface->description = g_strdup(ifdescription);
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iface->dlt = dlt;
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iface->dltname = g_strdup(dltname);
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iface->dltdescription = g_strdup(dltdescription);
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extcap->interfaces = g_list_append(extcap->interfaces, (gpointer) iface);
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}
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void extcap_base_set_util_info(extcap_parameters * extcap, const char * exename, const char * major, const char * minor, const char * release, const char * helppage)
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{
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extcap->exename = g_path_get_basename(exename);
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g_assert(major);
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if (!minor)
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g_assert(!release);
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extcap->version = g_strdup_printf("%s%s%s%s%s",
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major,
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minor ? "." : "",
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minor ? minor : "",
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release ? "." : "",
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release ? release : "");
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extcap->helppage = g_strdup(helppage);
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}
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static void extcap_custom_log(const gchar *log_domain,
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GLogLevelFlags log_level,
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const gchar *message,
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gpointer user_data)
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{
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if (log_level & G_LOG_LEVEL_DEBUG) {
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if (!custom_log)
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return;
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fprintf(custom_log, "%s\n", message);
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fflush(custom_log);
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} else {
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g_log_default_handler(log_domain, log_level, message, user_data);
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}
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}
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uint8_t extcap_base_parse_options(extcap_parameters * extcap, int result, char * optargument)
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{
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switch (result) {
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case EXTCAP_OPT_DEBUG:
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#ifdef _WIN32
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_putenv_s("G_MESSAGES_DEBUG", "all");
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#else
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setenv("G_MESSAGES_DEBUG", "all", 1);
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#endif
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break;
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case EXTCAP_OPT_DEBUG_FILE:
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extcap_init_custom_log(optargument);
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g_log_set_default_handler(extcap_custom_log, NULL);
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break;
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case EXTCAP_OPT_LIST_INTERFACES:
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extcap->do_list_interfaces = 1;
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break;
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case EXTCAP_OPT_VERSION:
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extcap->ws_version = g_strdup(optargument);
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extcap->do_version = 1;
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break;
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case EXTCAP_OPT_LIST_DLTS:
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extcap->do_list_dlts = 1;
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break;
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case EXTCAP_OPT_INTERFACE:
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extcap->interface = g_strdup(optargument);
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break;
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case EXTCAP_OPT_CONFIG:
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extcap->show_config = 1;
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break;
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case EXTCAP_OPT_CAPTURE:
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extcap->capture = 1;
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break;
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case EXTCAP_OPT_CAPTURE_FILTER:
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extcap->capture_filter = g_strdup(optargument);
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break;
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case EXTCAP_OPT_FIFO:
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extcap->fifo = g_strdup(optargument);
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break;
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}
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return 1;
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}
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static void extcap_iface_print(gpointer data, gpointer userdata _U_)
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{
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extcap_interface * iface = (extcap_interface *)data;
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printf("interface {value=%s}", iface->interface);
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if (iface->description != NULL)
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printf ("{display=%s}\n", iface->description);
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else
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printf ("\n");
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}
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static gint extcap_iface_compare(gconstpointer a, gconstpointer b)
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{
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const extcap_interface * iface_a = (const extcap_interface *)a;
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return (g_strcmp0(iface_a->interface, (const char *) b));
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}
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static void extcap_print_version(extcap_parameters * extcap)
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{
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printf("extcap {version=%s}", extcap->version != NULL ? extcap->version : "unknown");
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if (extcap->helppage != NULL)
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printf("{help=%s}", extcap->helppage);
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printf("\n");
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}
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static gint extcap_iface_listall(extcap_parameters * extcap, uint8_t list_ifs)
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{
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if (list_ifs) {
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if (g_list_length(extcap->interfaces) > 0) {
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extcap_print_version(extcap);
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g_list_foreach(extcap->interfaces, extcap_iface_print, extcap);
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}
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} else {
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if (extcap->do_version) {
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extcap_print_version(extcap);
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} else {
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GList * element = NULL;
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extcap_interface * iface = NULL;
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if ((element = g_list_find_custom(extcap->interfaces, extcap->interface, extcap_iface_compare)) == NULL)
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return 0;
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iface = (extcap_interface *) element->data;
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printf("dlt {number=%u}{name=%s}", iface->dlt, iface->dltname != NULL ? iface->dltname : iface->interface);
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if (iface->description != NULL)
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printf ("{display=%s}\n", iface->dltdescription);
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else
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printf ("\n");
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}
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}
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return 1;
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}
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uint8_t extcap_base_handle_interface(extcap_parameters * extcap)
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{
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/* A fifo must be provided for capture */
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if (extcap->capture && (extcap->fifo == NULL || strlen(extcap->fifo) <= 0)) {
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extcap->capture = 0;
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g_error("Extcap Error: No FIFO pipe provided");
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return 0;
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}
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if (extcap->do_list_interfaces) {
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return extcap_iface_listall(extcap, 1);
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} else if (extcap->do_version || extcap->do_list_dlts) {
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return extcap_iface_listall(extcap, 0);
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}
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return 0;
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}
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static void extcap_iface_free(gpointer data)
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{
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extcap_interface * iface = (extcap_interface *)data;
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g_free(iface->interface);
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g_free(iface->description);
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g_free(iface->dltname);
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g_free(iface->dltdescription);
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g_free(iface);
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}
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static void extcap_help_option_free(gpointer option)
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{
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extcap_option_t* o = (extcap_option_t*)option;
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g_free(o->optname);
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g_free(o->optdesc);
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g_free(o);
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}
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void extcap_base_cleanup(extcap_parameters ** extcap)
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{
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g_list_free_full((*extcap)->interfaces, extcap_iface_free);
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g_free((*extcap)->exename);
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g_free((*extcap)->fifo);
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g_free((*extcap)->interface);
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g_free((*extcap)->version);
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g_free((*extcap)->helppage);
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g_free((*extcap)->help_header);
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g_free((*extcap)->ws_version);
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g_list_free_full((*extcap)->help_options, extcap_help_option_free);
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g_free(*extcap);
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*extcap = NULL;
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}
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static void extcap_print_option(gpointer option, gpointer user_data _U_)
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{
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extcap_option_t* o = (extcap_option_t*)option;
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printf("\t%s: %s\n", o->optname, o->optdesc);
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}
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void extcap_help_print(extcap_parameters * extcap)
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{
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printf("\nWireshark - %s v%s\n\n", extcap->exename, extcap->version);
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printf("Usage:\n");
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printf("%s", extcap->help_header);
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printf("\n");
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printf("Options:\n");
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g_list_foreach(extcap->help_options, extcap_print_option, NULL);
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printf("\n");
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}
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void extcap_help_add_option(extcap_parameters * extcap, const char * help_option_name, const char * help_option_desc)
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{
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extcap_option_t* o = g_new0(extcap_option_t, 1);
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o->optname = g_strdup(help_option_name);
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o->optdesc = g_strdup(help_option_desc);
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extcap->help_options = g_list_append(extcap->help_options, o);
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}
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void extcap_help_add_header(extcap_parameters * extcap, char * help_header)
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{
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extcap->help_header = g_strdup(help_header);
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extcap_help_add_option(extcap, "--extcap-interfaces", "list the extcap Interfaces");
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extcap_help_add_option(extcap, "--extcap-dlts", "list the DLTs");
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extcap_help_add_option(extcap, "--extcap-interface <iface>", "specify the extcap interface");
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extcap_help_add_option(extcap, "--extcap-config", "list the additional configuration for an interface");
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extcap_help_add_option(extcap, "--capture", "run the capture");
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extcap_help_add_option(extcap, "--extcap-capture-filter <filter>", "the capture filter");
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extcap_help_add_option(extcap, "--fifo <file>", "dump data to file or fifo");
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extcap_help_add_option(extcap, "--extcap-version", "print tool version");
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extcap_help_add_option(extcap, "--debug", "print additional messages");
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extcap_help_add_option(extcap, "--debug-file", "print debug messages to file");
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}
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void extcap_init_custom_log(const char* filename)
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{
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if (!filename || strlen(filename) == 0)
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return;
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custom_log = fopen(filename, "w");
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if (!custom_log)
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g_error("Can't open custom log file: %s (%s)", filename, strerror(errno));
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}
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void extcap_config_debug(unsigned* count)
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{
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printf("arg {number=%u}{call=--debug}{display=Run in debug mode}"
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"{type=boolean}{default=false}{tooltip=Print debug messages}{required=false}"
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"{group=Debug}\n", (*count)++);
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printf("arg {number=%u}{call=--debug-file}{display=Use a file for debug}"
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"{type=string}{tooltip=Set a file where the debug messages are written}{required=false}"
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"{group=Debug}\n", (*count)++);
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}
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void extcap_cmdline_debug(char** ar, const unsigned n)
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{
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GString* cmdline = g_string_new("cmdline: ");
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unsigned i;
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for (i = 0; i < n; i++)
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g_string_append_printf(cmdline, "%s ", ar[i]);
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g_debug("%s", cmdline->str);
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g_string_free(cmdline, TRUE);
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}
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/*
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 4
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=4 tabstop=4 expandtab:
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* :indentSize=4:tabSize=4:noTabs=true:
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*/
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