#include <stdlib.h>
#include <string.h>
-#ifdef WIN32
+#ifdef _WIN32
#include <windows.h>
#include <process.h>
#include <time.h>
#include <unistd.h>
#endif
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_WAIT_H
+#include <sys/wait.h>
+#endif
+
#include <glib.h>
#include <log.h>
+#include <epan/prefs.h>
+#include <epan/prefs-int.h>
+
#include <wsutil/file_util.h>
#include <wsutil/filesystem.h>
#include <wsutil/tempfile.h>
#include "capture_opts.h"
-#ifdef HAVE_EXTCAP
-
#include "extcap.h"
#include "extcap_parser.h"
+#include "extcap_spawn.h"
#ifdef _WIN32
static HANDLE pipe_h = NULL;
#endif
+#define EXTCAP_PREF_SIZE 256
+static void extcap_child_watch_cb(GPid pid, gint status _U_, gpointer user_data);
+
/* internal container, for all the extcap interfaces that have been found.
* will be resetted by every call to extcap_interface_list() and is being
- * used in extcap_get_if_* as well as extcaps_init_initerfaces to ensure,
+ * used in extcap_get_if_* as well as extcap_init_interfaces to ensure,
* that only extcap interfaces are being given to underlying extcap programs
*/
static GHashTable *ifaces = NULL;
-/* Prefix for the pipe interfaces */
-#define EXTCAP_PIPE_PREFIX "wireshark_extcap"
+/* internal container, for all the extcap executables that have been found.
+ * will be resetted by every call to extcap_interface_list() and is being
+ * used for printing information about all extcap interfaces found
+ */
+static GHashTable *tools = NULL;
+
+/* internal container, to map preferences for extcap utilities to dynamic
+ * memory content, which survives extcap if garbage collection, and does
+ * not lead to dangling pointers
+ */
+static GHashTable *extcap_prefs_dynamic_vals = NULL;
/* Callback definition for extcap_foreach */
-typedef gboolean (*extcap_cb_t)(const gchar *extcap, gchar *output, void *data,
+typedef gboolean (*extcap_cb_t)(const gchar *extcap, const gchar *ifname, gchar *output, void *data,
gchar **err_str);
-/* #define ARG_DEBUG */
-#if ARG_DEBUG
-static void extcap_debug_arguments ( extcap_arg *arg_iter );
-#endif
-
static gboolean
-extcap_if_exists(const char *ifname)
+extcap_if_exists(const gchar *ifname)
{
- if ( ifname != NULL )
- {
- if ( ifaces != NULL )
- {
- if ( g_hash_table_size(ifaces) > 0 )
- {
- if ( g_hash_table_lookup(ifaces, (const gchar *)ifname) != NULL )
- {
- return TRUE;
- }
- }
- }
- }
+ if ( !ifname || !ifaces )
+ return FALSE;
+
+ if ( g_hash_table_lookup(ifaces, ifname) )
+ return TRUE;
+
return FALSE;
}
static gboolean
-extcap_if_exists_for_extcap(const char *ifname, const char *extcap)
+extcap_if_exists_for_extcap(const gchar *ifname, const gchar *extcap)
{
- gchar * entry = NULL;
+ gchar *entry = (gchar *)g_hash_table_lookup(ifaces, ifname);
- if ( extcap_if_exists(ifname) )
- {
- if ( ( entry = (gchar *)g_hash_table_lookup(ifaces, (const gchar *)ifname) ) != NULL )
- {
- if ( strcmp(entry, extcap) == 0 )
- return TRUE;
- }
- }
+ if ( entry && strcmp(entry, extcap) == 0 )
+ return TRUE;
return FALSE;
}
static gchar *
-extcap_if_executable(const char *ifname)
+extcap_if_executable(const gchar *ifname)
{
- if ( extcap_if_exists(ifname) )
- return (gchar *)g_hash_table_lookup(ifaces, (const gchar *)ifname);
-
- return (gchar *)NULL;
+ return (gchar *)g_hash_table_lookup(ifaces, ifname);
}
static void
-extcap_if_cleanup(void)
+extcap_if_add(const gchar *ifname, const gchar *extcap)
{
- if ( ifaces == NULL )
- ifaces = g_hash_table_new(g_str_hash, g_str_equal);
+ if ( !g_hash_table_lookup(ifaces, ifname) )
+ g_hash_table_insert(ifaces, g_strdup(ifname), g_strdup(extcap));
+}
- g_hash_table_remove_all(ifaces);
+static void
+extcap_free_info (gpointer data) {
+ extcap_info * info = (extcap_info *)data;
+
+ g_free (info->basename);
+ g_free (info->full_path);
+ g_free (info->version);
+ g_free (info);
}
static void
-extcap_if_add(gchar *ifname, gchar *extcap)
+extcap_tool_add(const gchar *extcap, const extcap_interface *interface)
{
- if ( g_hash_table_lookup(ifaces, ifname) == NULL )
- g_hash_table_insert(ifaces, ifname, extcap);
+ char *toolname;
+
+ if ( !extcap || !interface )
+ return;
+
+ toolname = g_path_get_basename(extcap);
+
+ if ( !g_hash_table_lookup(tools, toolname) ) {
+ extcap_info * store = (extcap_info *)g_new0(extcap_info, 1);
+ store->version = g_strdup(interface->version);
+ store->full_path = g_strdup(extcap);
+ store->basename = g_strdup(toolname);
+
+ g_hash_table_insert(tools, g_strdup(toolname), store);
+ }
+
+ g_free(toolname);
}
+/* Note: args does not need to be NULL-terminated. */
static void extcap_foreach(gint argc, gchar **args, extcap_cb_t cb,
void *cb_data, char **err_str, const char * ifname _U_) {
const char *dirname = get_extcap_dir();
GDir *dir;
const gchar *file;
gboolean keep_going;
- gchar **argv;
keep_going = TRUE;
- argv = (gchar **) g_malloc0(sizeof(gchar *) * (argc + 2));
-
if ((dir = g_dir_open(dirname, 0, NULL)) != NULL) {
-#ifdef WIN32
- dirname = g_strescape(dirname,NULL);
-#endif
+ GString *extcap_path = NULL;
+
+ extcap_path = g_string_new("");
while (keep_going && (file = g_dir_read_name(dir)) != NULL ) {
- GString *extcap_string = NULL;
- gchar *extcap = NULL;
gchar *command_output = NULL;
- gboolean status = FALSE;
- gint i;
- gint exit_status = 0;
- GError *error = NULL;
/* full path to extcap binary */
- extcap_string = g_string_new("");
-#ifdef WIN32
- g_string_printf(extcap_string, "%s\\\\%s",dirname,file);
- extcap = g_string_free(extcap_string, FALSE);
+#ifdef _WIN32
+ g_string_printf(extcap_path, "%s\\%s", dirname, file);
#else
- g_string_printf(extcap_string, "%s/%s", dirname, file);
- extcap = g_string_free(extcap_string, FALSE);
+ g_string_printf(extcap_path, "%s/%s", dirname, file);
#endif
- if ( extcap_if_exists(ifname) && !extcap_if_exists_for_extcap(ifname, extcap ) )
+ if ( extcap_if_exists(ifname) && !extcap_if_exists_for_extcap(ifname, extcap_path->str ) )
continue;
- argv[0] = extcap;
- for (i = 0; i < argc; ++i)
- argv[i+1] = args[i];
- argv[argc+1] = NULL;
-
- status = g_spawn_sync(dirname, argv, NULL,
- (GSpawnFlags) 0, NULL, NULL,
- &command_output, NULL, &exit_status, &error);
-
- if (status && exit_status == 0)
- keep_going = cb(extcap, command_output, cb_data, err_str);
+ if ( extcap_spawn_sync ( (gchar *) dirname, extcap_path->str, argc, args, &command_output ) )
+ keep_going = cb(extcap_path->str, ifname, command_output, cb_data, err_str);
- g_free(extcap);
g_free(command_output);
}
g_dir_close(dir);
+ g_string_free(extcap_path, TRUE);
}
- g_free(argv);
}
-static gboolean dlt_cb(const gchar *extcap _U_, gchar *output, void *data,
+static void extcap_free_dlt(gpointer d, gpointer user_data _U_) {
+ if (d == NULL)
+ return;
+
+ g_free(((extcap_dlt *)d)->name);
+ g_free(((extcap_dlt *)d)->display);
+}
+
+static gboolean dlt_cb(const gchar *extcap _U_, const gchar *ifname _U_, gchar *output, void *data,
char **err_str) {
- extcap_token_sentence *tokens;
- extcap_dlt *dlts, *dlt_iter, *next;
+ GList *dlts = NULL, *temp = NULL;
+
if_capabilities_t *caps;
GList *linktype_list = NULL;
data_link_info_t *data_link_info;
+ extcap_dlt * dlt_item;
- tokens = extcap_tokenize_sentences(output);
- extcap_parse_dlts(tokens, &dlts);
-
- extcap_free_tokenized_sentence_list(tokens);
+ dlts = extcap_parse_dlts(output);
+ temp = dlts;
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "Extcap pipe %s ", extcap);
caps = (if_capabilities_t *) g_malloc(sizeof *caps);
caps->can_set_rfmon = FALSE;
- dlt_iter = dlts;
- while (dlt_iter != NULL ) {
- g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,
- " DLT %d name=\"%s\" display=\"%s\" ", dlt_iter->number,
- dlt_iter->name, dlt_iter->display);
-
- data_link_info = g_new(data_link_info_t, 1);
- data_link_info->dlt = dlt_iter->number;
- data_link_info->name = g_strdup(dlt_iter->name);
- data_link_info->description = g_strdup(dlt_iter->display);
- linktype_list = g_list_append(linktype_list, data_link_info);
- dlt_iter = dlt_iter->next_dlt;
+ while (dlts) {
+ dlt_item = (extcap_dlt *)dlts->data;
+ if (dlt_item) {
+ g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,
+ " DLT %d name=\"%s\" display=\"%s\" ", dlt_item->number,
+ dlt_item->name, dlt_item->display);
+
+ data_link_info = g_new(data_link_info_t, 1);
+ data_link_info->dlt = dlt_item->number;
+ data_link_info->name = g_strdup(dlt_item->name);
+ data_link_info->description = g_strdup(dlt_item->display);
+ linktype_list = g_list_append(linktype_list, data_link_info);
+ }
+
+ dlts = g_list_next(dlts);
}
/* Check to see if we built a list */
g_free(caps);
}
- dlt_iter = dlts;
- while (dlt_iter != NULL ) {
- next = dlt_iter->next_dlt;
- extcap_free_dlt(dlt_iter);
- dlt_iter = next;
- }
+ g_list_foreach(temp, extcap_free_dlt, NULL);
return FALSE;
}
gint i;
if_capabilities_t *caps = NULL;
- if (ifname != NULL && err_str != NULL)
+ if (err_str != NULL)
*err_str = NULL;
if ( extcap_if_exists(ifname) )
argv[1] = g_strdup(EXTCAP_ARGUMENT_INTERFACE);
argv[2] = g_strdup(ifname);
- if (err_str)
- *err_str = NULL;
extcap_foreach(3, argv, dlt_cb, &caps, err_str, ifname);
for (i = 0; i < 3; ++i)
return caps;
}
-static gboolean interfaces_cb(const gchar *extcap, gchar *output, void *data,
+static void extcap_free_interface(gpointer i, gpointer user_data _U_) {
+
+ extcap_interface * interface = (extcap_interface *)i;
+
+ if ( i == NULL )
+ return;
+
+ g_free(interface->call);
+ g_free(interface->display);
+ g_free(interface->version);
+}
+
+static gboolean interfaces_cb(const gchar *extcap, const gchar *ifname _U_, gchar *output, void *data,
char **err_str _U_) {
GList **il = (GList **) data;
- extcap_token_sentence *tokens;
- extcap_interface *interfaces, *int_iter; /*, *next; */
- if_info_t *if_info;
+ GList *interfaces = NULL, *walker = NULL;
+ extcap_interface *int_iter = NULL;
+ if_info_t *if_info = NULL;
- tokens = extcap_tokenize_sentences(output);
- extcap_parse_interfaces(tokens, &interfaces);
-
- extcap_free_tokenized_sentence_list(tokens);
+ interfaces = extcap_parse_interfaces(output);
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "Extcap pipe %s ", extcap);
- int_iter = interfaces;
- while (int_iter != NULL ) {
- if ( extcap_if_exists(int_iter->call) )
+ walker = interfaces;
+ while (walker != NULL ) {
+ int_iter = (extcap_interface *)walker->data;
+ if ( int_iter->if_type == EXTCAP_SENTENCE_INTERFACE && extcap_if_exists(int_iter->call) )
{
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_WARNING, "Extcap interface \"%s\" is already provided by \"%s\" ",
int_iter->call, (gchar *)extcap_if_executable(int_iter->call) );
- int_iter = int_iter->next_interface;
+ walker = g_list_next(walker);
continue;
}
- g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, " Interface [%s] \"%s\" ",
- int_iter->call, int_iter->display);
+ if ( int_iter->if_type == EXTCAP_SENTENCE_INTERFACE )
+ g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, " Interface [%s] \"%s\" ",
+ int_iter->call, int_iter->display);
+ else if ( int_iter->if_type == EXTCAP_SENTENCE_EXTCAP )
+ g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, " Extcap [%s] ", int_iter->call);
- if_info = g_new0(if_info_t, 1);
- if_info->name = g_strdup(int_iter->call);
- if_info->friendly_name = g_strdup(int_iter->display);
+ if ( int_iter->if_type == EXTCAP_SENTENCE_INTERFACE ) {
+ if (il != NULL) {
+ if_info = g_new0(if_info_t, 1);
+ if_info->name = g_strdup(int_iter->call);
+ if_info->friendly_name = g_strdup(int_iter->display);
- if_info->type = IF_EXTCAP;
+ if_info->type = IF_EXTCAP;
- if_info->extcap = g_strdup(extcap);
- *il = g_list_append(*il, if_info);
+ if_info->extcap = g_strdup(extcap);
+ *il = g_list_append(*il, if_info);
+ }
- extcap_if_add(g_strdup(int_iter->call), g_strdup(extcap) );
- int_iter = int_iter->next_interface;
+ extcap_if_add(int_iter->call, extcap);
+ }
+
+ /* Call for interfaces and tools alike. Multiple calls (because a tool has multiple
+ * interfaces) are handled internally */
+ extcap_tool_add(extcap, int_iter);
+
+ walker = g_list_next(walker);
}
+ g_list_foreach(interfaces, extcap_free_interface, NULL);
+
return TRUE;
}
-GList *
-extcap_interface_list(char **err_str) {
+static gint
+if_info_compare(gconstpointer a, gconstpointer b)
+{
+ gint comp = 0;
+ const if_info_t * if_a = (const if_info_t *)a;
+ const if_info_t * if_b = (const if_info_t *)b;
+
+ if ( (comp = g_strcmp0(if_a->name, if_b->name)) == 0 )
+ return g_strcmp0(if_a->friendly_name, if_b->friendly_name);
+
+ return comp;
+}
+
+static void
+extcap_reload_interface_list(GList **retp, char **err_str) {
gchar *argv;
- /* gint i; */
- GList *ret = NULL;
if (err_str != NULL)
- *err_str = NULL;
+ *err_str = NULL;
- extcap_if_cleanup();
+ /* ifaces is used as cache, do not destroy its contents when
+ * returning or no extcap interfaces can be queried for options */
+ if (ifaces == NULL)
+ ifaces = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, g_free);
+ else
+ g_hash_table_remove_all(ifaces);
+
+ if (tools == NULL)
+ tools = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, extcap_free_info);
+ else
+ g_hash_table_remove_all(tools);
argv = g_strdup(EXTCAP_ARGUMENT_LIST_INTERFACES);
- if (err_str)
- *err_str = NULL;
- extcap_foreach(1, &argv, interfaces_cb, &ret, err_str, NULL);
+ extcap_foreach(1, &argv, interfaces_cb, retp, err_str, NULL);
g_free(argv);
+}
- return ret;
+GHashTable *
+extcap_tools_list(void) {
+ if ( tools == NULL || g_hash_table_size(tools) == 0 )
+ extcap_reload_interface_list(NULL, NULL);
+
+ return tools;
}
-static void g_free_1(gpointer data, gpointer user_data _U_)
-{
+GList *
+append_extcap_interface_list(GList *list, char **err_str) {
+ GList *ret = NULL;
+ GList *entry;
+ void *data;
+
+ /* Update the extcap interfaces and get a list of their if_infos */
+ extcap_reload_interface_list(&ret, err_str);
+
+ /* Sort that list */
+ ret = g_list_sort(ret, if_info_compare);
+
+ /* Append the interfaces in that list to the list we're handed. */
+ while (ret != NULL) {
+ entry = g_list_first(ret);
+ data = entry->data;
+ ret = g_list_delete_link(ret, entry);
+ list = g_list_append(list, data);
+ }
+ return list;
+}
+
+static void extcap_free_arg_elem(gpointer data, gpointer user_data _U_) {
+ extcap_free_arg((extcap_arg *) data);
g_free(data);
}
+void extcap_register_preferences(void)
+{
+ GList * interfaces = NULL;
+
+ module_t * dev_module = prefs_find_module("extcap");
+
+ if ( !dev_module )
+ return;
+
+ if ( ! ifaces || g_hash_table_size(ifaces) == 0 )
+ extcap_reload_interface_list(NULL, NULL);
+
+ interfaces = g_hash_table_get_keys(ifaces);
+
+ while ( interfaces ) {
+ extcap_get_if_configuration((gchar *)interfaces->data);
+
+ interfaces = g_list_next(interfaces);
+ }
+}
+
+void extcap_cleanup(void)
+{
+ if (extcap_prefs_dynamic_vals) {
+ g_hash_table_destroy(extcap_prefs_dynamic_vals);
+ }
+}
+
+void extcap_pref_store(extcap_arg * arg, const char * newval)
+{
+ if (arg && arg->storeval != NULL)
+ {
+ memset(arg->storeval, 0, EXTCAP_PREF_SIZE * sizeof(char));
+ if ( newval )
+ g_snprintf(arg->storeval, EXTCAP_PREF_SIZE, "%s", newval);
+ }
+
+}
+
+static gchar * extcap_prefs_dynamic_valptr(const char *name)
+{
+ gchar *valp;
+ if (!extcap_prefs_dynamic_vals) {
+ /* Initialize table only as needed, most preferences are not dynamic */
+ extcap_prefs_dynamic_vals = g_hash_table_new_full(g_str_hash, g_str_equal,
+ g_free, g_free);
+ }
+ valp = (gchar *)g_hash_table_lookup(extcap_prefs_dynamic_vals, name);
+ if (!valp) {
+ /* New dynamic pref, allocate, initialize and store. */
+ valp = g_new0(gchar, EXTCAP_PREF_SIZE);
+ g_hash_table_insert(extcap_prefs_dynamic_vals, g_strdup(name), valp);
+ }
+ return valp;
+}
+
static void extcap_free_if_configuration(GList *list)
{
- GList *elem;
+ GList *elem, *sl;
for (elem = g_list_first(list); elem; elem = elem->next)
{
- GList *arg_list;
- if (elem->data == NULL)
- {
- continue;
+ if (elem->data != NULL) {
+ /* g_list_free_full() only exists since 2.28. */
+ sl = g_list_first((GList *)elem->data);
+ g_list_foreach(sl, (GFunc)extcap_free_arg_elem, NULL);
+ g_list_free(sl);
}
-
- arg_list = g_list_first((GList *)elem->data);
- g_list_foreach(arg_list, g_free_1, NULL);
- g_list_free(arg_list);
}
g_list_free(list);
}
-static gboolean search_cb(const gchar *extcap _U_, gchar *output, void *data,
+struct preference *
+extcap_pref_for_argument(const gchar *ifname, struct _extcap_arg * arg) {
+ struct preference * pref = NULL;
+
+ GRegex * regex_name = g_regex_new ("[-]+", (GRegexCompileFlags) 0, (GRegexMatchFlags) 0, NULL );
+ GRegex * regex_ifname = g_regex_new ("(?![a-zA-Z1-9_]).", (GRegexCompileFlags) 0, (GRegexMatchFlags) 0, NULL );
+ if (regex_name && regex_ifname) {
+ if ( prefs_find_module("extcap") ) {
+ gchar * pref_name = g_regex_replace(regex_name, arg->call, strlen(arg->call), 0, "", (GRegexMatchFlags) 0, NULL );
+ gchar * ifname_underscore = g_regex_replace(regex_ifname, ifname, strlen(ifname), 0, "_", (GRegexMatchFlags) 0, NULL );
+ gchar * ifname_lowercase = g_ascii_strdown(ifname_underscore, -1);
+ gchar * pref_ifname = g_strconcat(ifname_lowercase, ".", pref_name, NULL);
+
+ pref = prefs_find_preference(prefs_find_module("extcap"), pref_ifname);
+
+ g_free(pref_name);
+ g_free(ifname_underscore);
+ g_free(ifname_lowercase);
+ g_free(pref_ifname);
+ }
+ }
+ if (regex_name) {
+ g_regex_unref(regex_name);
+ }
+ if (regex_ifname) {
+ g_regex_unref(regex_ifname);
+ }
+
+ return pref;
+}
+
+static gboolean search_cb(const gchar *extcap _U_, const gchar *ifname _U_, gchar *output, void *data,
char **err_str _U_) {
- extcap_token_sentence *tokens = NULL;
GList *arguments = NULL;
GList **il = (GList **) data;
+ module_t * dev_module = NULL;
- tokens = extcap_tokenize_sentences(output);
- arguments = extcap_parse_args(tokens);
+ arguments = extcap_parse_args(output);
- extcap_free_tokenized_sentence_list(tokens);
+ dev_module = prefs_find_module("extcap");
-#if ARG_DEBUG
- extcap_debug_arguments ( arguments );
-#endif
+ if ( dev_module ) {
+ GList * walker = arguments;
+
+ GRegex * regex_name = g_regex_new ("[-]+", (GRegexCompileFlags) 0, (GRegexMatchFlags) 0, NULL );
+ GRegex * regex_ifname = g_regex_new ("(?![a-zA-Z1-9_]).", (GRegexCompileFlags) 0, (GRegexMatchFlags) 0, NULL );
+ if (regex_name && regex_ifname) {
+ while ( walker != NULL ) {
+ extcap_arg * arg = (extcap_arg *)walker->data;
+ arg->device_name = g_strdup(ifname);
+
+ if ( arg->save ) {
+ struct preference * pref = NULL;
+
+ gchar * pref_name = g_regex_replace(regex_name, arg->call, strlen(arg->call), 0, "", (GRegexMatchFlags) 0, NULL );
+ gchar * ifname_underscore = g_regex_replace(regex_ifname, ifname, strlen(ifname), 0, "_", (GRegexMatchFlags) 0, NULL );
+ gchar * ifname_lowercase = g_ascii_strdown(ifname_underscore, -1);
+ gchar * pref_ifname = g_strconcat(ifname_lowercase, ".", pref_name, NULL);
+
+ if ( ( pref = prefs_find_preference(dev_module, pref_ifname) ) == NULL ) {
+ /* Set an initial value */
+ if ( ! arg->storeval && arg->default_complex )
+ {
+ arg->storeval = extcap_prefs_dynamic_valptr(pref_ifname);
+ g_snprintf(arg->storeval, EXTCAP_PREF_SIZE, "%s", arg->default_complex->_val);
+ }
+
+ prefs_register_string_preference(dev_module, g_strdup(pref_ifname),
+ arg->display, arg->display, (const gchar **)&(arg->storeval));
+ } else {
+ /* Been here before, restore stored value */
+ if (! arg->storeval && pref->varp.string)
+ {
+ arg->storeval = extcap_prefs_dynamic_valptr(pref_ifname);
+ g_snprintf(arg->storeval, EXTCAP_PREF_SIZE, "%s", *(pref->varp.string));
+ }
+ }
+
+ g_free(pref_name);
+ g_free(ifname_underscore);
+ g_free(ifname_lowercase);
+ g_free(pref_ifname);
+ }
+
+ walker = g_list_next(walker);
+ }
+ }
+ if (regex_name) {
+ g_regex_unref(regex_name);
+ }
+ if (regex_ifname) {
+ g_regex_unref(regex_ifname);
+ }
+ }
*il = g_list_append(*il, arguments);
GList *
extcap_get_if_configuration(const char * ifname) {
- gchar *argv[4];
+ gchar *argv[3];
GList *ret = NULL;
gchar **err_str = NULL;
+ int i;
if ( extcap_if_exists(ifname) )
{
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "Extcap path %s",
get_extcap_dir());
- if (err_str != NULL)
- *err_str = NULL;
-
argv[0] = g_strdup(EXTCAP_ARGUMENT_CONFIG);
argv[1] = g_strdup(EXTCAP_ARGUMENT_INTERFACE);
argv[2] = g_strdup(ifname);
- argv[3] = NULL;
- extcap_foreach(4, argv, search_cb, &ret, err_str, ifname);
+ extcap_foreach(3, argv, search_cb, &ret, err_str, ifname);
+
+ for (i = 0; i < 3; i++)
+ g_free(argv[i]);
}
return ret;
}
-void extcap_cleanup(capture_options * capture_opts) {
+gboolean
+extcap_has_configuration(const char * ifname, gboolean is_required) {
+ GList * arguments = 0;
+ GList * walker = 0, * item = 0;
+
+ gboolean found = FALSE;
+
+ arguments = extcap_get_if_configuration((const char *)( ifname ) );
+ walker = g_list_first(arguments);
+
+ while ( walker != NULL && ! found ) {
+ item = g_list_first((GList *)(walker->data));
+ while ( item != NULL && ! found ) {
+ if ( (extcap_arg *)(item->data) != NULL ) {
+ extcap_arg * arg = (extcap_arg *)(item->data);
+ /* Should required options be present, or any kind of options */
+ if ( ! is_required )
+ found = TRUE;
+ else if ( arg->is_required ) {
+ gchar * stored = NULL;
+ gchar * defval = NULL;
+
+ if ( arg->storeval != NULL )
+ stored = arg->storeval;
+
+ if ( arg->default_complex != NULL && arg->default_complex->_val != NULL )
+ defval = arg->default_complex->_val;
+
+ if ( arg->is_required ) {
+ /* If stored and defval is identical and the argument is required,
+ * configuration is needed */
+ if ( defval && stored && g_strcmp0(stored, defval) == 0 )
+ found = TRUE;
+ else if ( ! defval && (!stored || strlen(g_strchomp(stored)) <= (size_t)0) )
+ found = TRUE;
+ }
+
+ if ( arg->arg_type == EXTCAP_ARG_FILESELECT ) {
+ if ( arg->fileexists && ! ( file_exists(defval) || file_exists(stored) ) )
+ found = TRUE;
+ }
+ }
+ }
+
+ item = item->next;
+ }
+ walker = walker->next;
+ }
+ extcap_free_if_configuration(arguments);
+
+ return found;
+}
+
+/* taken from capchild/capture_sync.c */
+static gboolean pipe_data_available(int pipe_fd) {
+#ifdef _WIN32 /* PeekNamedPipe */
+ HANDLE hPipe = (HANDLE) _get_osfhandle(pipe_fd);
+ DWORD bytes_avail;
+
+ if (hPipe == INVALID_HANDLE_VALUE)
+ return FALSE;
+
+ if (! PeekNamedPipe(hPipe, NULL, 0, NULL, &bytes_avail, NULL))
+ return FALSE;
+
+ if (bytes_avail > 0)
+ return TRUE;
+ return FALSE;
+#else /* select */
+ fd_set rfds;
+ struct timeval timeout;
+
+ FD_ZERO(&rfds);
+ FD_SET(pipe_fd, &rfds);
+ timeout.tv_sec = 0;
+ timeout.tv_usec = 0;
+
+ if (select(pipe_fd+1, &rfds, NULL, NULL, &timeout) > 0)
+ return TRUE;
+
+ return FALSE;
+#endif
+}
+
+void extcap_if_cleanup(capture_options * capture_opts, gchar ** errormsg) {
interface_options interface_opts;
+ extcap_userdata * userdata;
guint icnt = 0;
+ gboolean overwrite_exitcode;
+ gchar * buffer;
+#define STDERR_BUFFER_SIZE 1024
for (icnt = 0; icnt < capture_opts->ifaces->len; icnt++) {
interface_opts = g_array_index(capture_opts->ifaces, interface_options,
/* skip native interfaces */
if (interface_opts.if_type != IF_EXTCAP)
- continue;
+ continue;
+
+ overwrite_exitcode = FALSE;
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,
"Extcap [%s] - Cleaning up fifo: %s; PID: %d", interface_opts.name,
interface_opts.extcap_fifo, interface_opts.extcap_pid);
-#ifdef WIN32
+#ifdef _WIN32
if (pipe_h)
{
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,
"Extcap [%s] - Closing spawned PID: %d", interface_opts.name,
interface_opts.extcap_pid);
+ userdata = (extcap_userdata *) interface_opts.extcap_userdata;
+ if ( userdata )
+ {
+ if (userdata->extcap_stderr_rd > 0 && pipe_data_available(userdata->extcap_stderr_rd) )
+ {
+ buffer = (gchar * )g_malloc0(sizeof(gchar) * STDERR_BUFFER_SIZE + 1);
+#ifdef _WIN32
+ win32_readfrompipe((HANDLE)_get_osfhandle(userdata->extcap_stderr_rd), STDERR_BUFFER_SIZE, buffer);
+#else
+ if (read(userdata->extcap_stderr_rd, buffer, sizeof(gchar) * STDERR_BUFFER_SIZE) <= 0 )
+ buffer[0] = '\0';
+#endif
+ if ( strlen ( buffer) > 0 )
+ {
+ userdata->extcap_stderr = g_strdup_printf("%s", buffer);
+ userdata->exitcode = 1;
+ }
+ g_free(buffer);
+ }
+
+#ifndef _WIN32
+ /* Final child watch may not have been called */
+ if ( interface_opts.extcap_child_watch != 0 )
+ {
+ extcap_child_watch_cb(userdata->pid, 0, capture_opts);
+ /* it will have changed in extcap_child_watch_cb */
+ interface_opts = g_array_index(capture_opts->ifaces, interface_options,
+ icnt);
+ }
+#endif
+
+ if ( userdata->extcap_stderr != NULL )
+ overwrite_exitcode = TRUE;
+
+ if ( overwrite_exitcode || userdata->exitcode != 0 )
+ {
+ if ( userdata->extcap_stderr != 0 )
+ {
+ if ( *errormsg == NULL )
+ *errormsg = g_strdup_printf("Error by extcap pipe: %s", userdata->extcap_stderr);
+ else
+ {
+ gchar * temp = g_strconcat ( *errormsg, "\nError by extcap pipe: " ,userdata->extcap_stderr, NULL );
+ g_free(*errormsg);
+ *errormsg = temp;
+ }
+ g_free (userdata->extcap_stderr );
+ }
+
+ userdata->extcap_stderr = NULL;
+ userdata->exitcode = 0;
+ }
+ }
+
if (interface_opts.extcap_child_watch > 0)
{
g_source_remove(interface_opts.extcap_child_watch);
if (interface_opts.extcap_pid != INVALID_EXTCAP_PID)
{
-#ifdef WIN32
+#ifdef _WIN32
TerminateProcess(interface_opts.extcap_pid, 0);
#endif
g_spawn_close_pid(interface_opts.extcap_pid);
interface_opts.extcap_pid = INVALID_EXTCAP_PID;
+
+ g_free(interface_opts.extcap_userdata);
+ interface_opts.extcap_userdata = NULL;
}
/* Make sure modified interface_opts is saved in capture_opts. */
}
}
-static void
-extcap_arg_cb(gpointer key, gpointer value, gpointer data) {
+static gboolean
+extcap_add_arg_and_remove_cb(gpointer key, gpointer value, gpointer data) {
GPtrArray *args = (GPtrArray *)data;
if ( key != NULL )
if ( value != NULL )
g_ptr_array_add(args, g_strdup((const gchar*)value));
+
+ return TRUE;
}
+
+ return FALSE;
}
-static void extcap_child_watch_cb(GPid pid, gint status _U_, gpointer user_data)
+void extcap_child_watch_cb(GPid pid, gint status _U_, gpointer user_data)
{
guint i;
interface_options interface_opts;
- capture_options *capture_opts = (capture_options *)user_data;
+ extcap_userdata * userdata = NULL;
+ capture_options * capture_opts = (capture_options *)(user_data);
+
+ if ( capture_opts == NULL || capture_opts->ifaces == NULL || capture_opts->ifaces->len == 0 )
+ return;
/* Close handle to child process. */
g_spawn_close_pid(pid);
interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
if (interface_opts.extcap_pid == pid)
{
- interface_opts.extcap_pid = INVALID_EXTCAP_PID;
+ userdata = (extcap_userdata *)interface_opts.extcap_userdata;
+ if ( userdata != NULL )
+ {
+ interface_opts.extcap_pid = INVALID_EXTCAP_PID;
+ userdata->exitcode = 0;
+#ifndef _WIN32
+ if ( WIFEXITED(status) )
+ {
+ if ( WEXITSTATUS(status) != 0 )
+ userdata->exitcode = WEXITSTATUS(status);
+ }
+ else
+ userdata->exitcode = G_SPAWN_ERROR_FAILED;
+#else
+ if (status != 0)
+ userdata->exitcode = status;
+#endif
+ if ( status == 0 && userdata->extcap_stderr != NULL )
+ userdata->exitcode = 1;
+ }
+ g_source_remove(interface_opts.extcap_child_watch);
interface_opts.extcap_child_watch = 0;
+
capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, i);
g_array_insert_val(capture_opts->ifaces, i, interface_opts);
break;
}
}
-/* call mkfifo for each extcap,
- * returns FALSE if there's an error creating a FIFO */
-gboolean
-extcaps_init_initerfaces(capture_options *capture_opts)
+static
+GPtrArray * extcap_prepare_arguments(interface_options interface_opts)
{
- guint i;
- interface_options interface_opts;
+ GPtrArray *result = NULL;
- for (i = 0; i < capture_opts->ifaces->len; i++)
+ if (interface_opts.if_type == IF_EXTCAP )
{
- GPtrArray *args = NULL;
- GPid pid = INVALID_EXTCAP_PID;
- gchar **tmp;
- int tmp_i;
-
- interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
-
- /* skip native interfaces */
- if (interface_opts.if_type != IF_EXTCAP )
- continue;
+ result = g_ptr_array_new();
- /* create pipe for fifo */
- if ( ! extcap_create_pipe ( &interface_opts.extcap_fifo ) )
- return FALSE;
-
- /* Create extcap call */
- args = g_ptr_array_new();
-#define add_arg(X) g_ptr_array_add(args, g_strdup(X))
+#define add_arg(X) g_ptr_array_add(result, g_strdup(X))
add_arg(interface_opts.extcap);
add_arg(EXTCAP_ARGUMENT_RUN_CAPTURE);
add_arg(EXTCAP_ARGUMENT_INTERFACE);
add_arg(interface_opts.name);
+ if (interface_opts.cfilter && strlen(interface_opts.cfilter) > 0) {
+ add_arg(EXTCAP_ARGUMENT_CAPTURE_FILTER);
+ add_arg(interface_opts.cfilter);
+ }
add_arg(EXTCAP_ARGUMENT_RUN_PIPE);
add_arg(interface_opts.extcap_fifo);
- if (interface_opts.extcap_args == NULL)
+ if (interface_opts.extcap_args == NULL || g_hash_table_size(interface_opts.extcap_args) == 0)
{
/* User did not perform interface configuration.
*
}
arg_list = g_list_first((GList *)elem->data);
- while (arg_list != NULL)
- {
+ while (arg_list != NULL) {
+ gchar * stored = NULL, * defval = NULL;
/* In case of boolflags only first element in arg_list is relevant. */
arg_iter = (extcap_arg*) (arg_list->data);
-
- if (arg_iter->arg_type == EXTCAP_ARG_BOOLFLAG)
- {
- if (arg_iter->default_complex != NULL
- && extcap_complex_get_bool(arg_iter->default_complex))
- {
- add_arg(arg_iter->call);
+ if ( arg_iter->storeval != NULL )
+ stored = arg_iter->storeval;
+
+ if ( arg_iter->default_complex != NULL && arg_iter->default_complex->_val != NULL )
+ defval = arg_iter->default_complex->_val;
+
+ /* Different data in storage then set for default */
+ if ( g_strcmp0(stored, defval) != 0 ) {
+ if ( arg_iter->arg_type == EXTCAP_ARG_BOOLFLAG ) {
+ if ( g_strcmp0(stored, "true") == 0 )
+ add_arg(arg_iter->call);
+ } else {
+ gchar * call = g_strconcat(arg_iter->call, " ", stored, NULL);
+ add_arg(call);
+ g_free(call);
}
+ } else if (arg_iter->arg_type == EXTCAP_ARG_BOOLFLAG) {
+ if (extcap_complex_get_bool(arg_iter->default_complex))
+ add_arg(arg_iter->call);
}
arg_list = arg_list->next;
}
else
{
- g_hash_table_foreach(interface_opts.extcap_args, extcap_arg_cb, args);
+ g_hash_table_foreach_remove(interface_opts.extcap_args, extcap_add_arg_and_remove_cb, result);
}
add_arg(NULL);
#undef add_arg
- /* Dump commandline parameters sent to extcap. */
- for (tmp = (gchar **)args->pdata, tmp_i = 0; *tmp && **tmp; ++tmp_i, ++tmp)
- {
- g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "argv[%d]: %s", tmp_i, *tmp);
- }
+ }
+
+ return result;
+}
+
+/* call mkfifo for each extcap,
+ * returns FALSE if there's an error creating a FIFO */
+gboolean
+extcap_init_interfaces(capture_options *capture_opts)
+{
+ guint i;
+ interface_options interface_opts;
+ extcap_userdata * userdata;
+
+ for (i = 0; i < capture_opts->ifaces->len; i++)
+ {
+ GPtrArray *args = NULL;
+ GPid pid = INVALID_EXTCAP_PID;
+
+ interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
+
+ /* skip native interfaces */
+ if (interface_opts.if_type != IF_EXTCAP )
+ continue;
- /* Wireshark for windows crashes here sometimes *
- * Access violation reading location 0x... */
- g_spawn_async(NULL, (gchar **)args->pdata, NULL,
- (GSpawnFlags) G_SPAWN_DO_NOT_REAP_CHILD, NULL, NULL,
- &pid,NULL);
+ /* create pipe for fifo */
+ if ( ! extcap_create_pipe ( &interface_opts.extcap_fifo ) )
+ return FALSE;
+
+ /* Create extcap call */
+ args = extcap_prepare_arguments(interface_opts);
+
+ userdata = g_new0(extcap_userdata, 1);
+
+ pid = extcap_spawn_async(userdata, args );
g_ptr_array_foreach(args, (GFunc)g_free, NULL);
g_ptr_array_free(args, TRUE);
+
+ if ( pid == INVALID_EXTCAP_PID )
+ {
+ g_free(userdata);
+ continue;
+ }
+
interface_opts.extcap_pid = pid;
+
interface_opts.extcap_child_watch =
g_child_watch_add(pid, extcap_child_watch_cb, (gpointer)capture_opts);
- capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, i);
- g_array_insert_val(capture_opts->ifaces, i, interface_opts);
-#ifdef WIN32
+#ifdef _WIN32
/* On Windows, wait for extcap to connect to named pipe.
* Some extcaps will present UAC screen to user.
* 30 second timeout should be reasonable timeout for extcap to
*/
if (pid != INVALID_EXTCAP_PID)
{
- DWORD dw;
- HANDLE handles[2];
- OVERLAPPED ov;
- ov.Pointer = 0;
- ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
-
- ConnectNamedPipe(pipe_h, &ov);
- handles[0] = ov.hEvent;
- handles[1] = pid;
-
- if (GetLastError() == ERROR_PIPE_CONNECTED)
- {
- g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "extcap connected to pipe");
- }
- else
- {
- dw = WaitForMultipleObjects(2, handles, FALSE, 30000);
- if (dw == WAIT_OBJECT_0)
- {
- /* ConnectNamedPipe finished. */
- DWORD code;
+ extcap_wait_for_pipe(pipe_h, pid);
+ }
- code = GetLastError();
- if (code == ERROR_IO_PENDING)
- {
- DWORD dummy;
- if (!GetOverlappedResult(ov.hEvent, &ov, &dummy, TRUE))
- {
- code = GetLastError();
- }
- else
- {
- code = ERROR_SUCCESS;
- }
- }
+#endif
- g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "ConnectNamedPipe code: %d", code);
- }
- else if (dw == (WAIT_OBJECT_0 + 1))
- {
- /* extcap process terminated. */
- g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "extcap terminated without connecting to pipe!");
- }
- else if (dw == WAIT_TIMEOUT)
- {
- g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "extcap didn't connect to pipe within 30 seconds!");
- }
- else
- {
- g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "WaitForMultipleObjects returned 0x%08X. Error %d", dw, GetLastError());
- }
- }
+ interface_opts.extcap_userdata = (gpointer) userdata;
- CloseHandle(ov.hEvent);
- }
-#endif
+ capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, i);
+ g_array_insert_val(capture_opts->ifaces, i, interface_opts);
}
return TRUE;
}
-#ifdef WIN32
+#ifdef _WIN32
/* called by capture_sync to get the CreatNamedPipe handle*/
HANDLE
extcap_get_win32_handle()
gboolean extcap_create_pipe(char ** fifo)
{
-#ifdef WIN32
+#ifdef _WIN32
gchar timestr[ 14+1 ];
time_t current_time;
gchar *temp_name = NULL;
int fd = 0;
- if ( ( fd = create_tempfile ( &temp_name, EXTCAP_PIPE_PREFIX ) ) == 0 )
+ if ((fd = create_tempfile(&temp_name, EXTCAP_PIPE_PREFIX, NULL)) < 0 )
return FALSE;
ws_close(fd);
return TRUE;
}
-#if ARG_DEBUG
-void extcap_debug_arguments ( extcap_arg *arg_iter )
-{
- extcap_value *v = NULL;
- GList *walker = NULL;
-
- printf("debug - parser dump\n");
- while (arg_iter != NULL) {
- printf("ARG %d call=%s display=\"%s\" type=", arg_iter->arg_num, arg_iter->call, arg_iter->display);
-
- switch (arg_iter->arg_type) {
- case EXTCAP_ARG_INTEGER:
- printf("int\n");
- break;
- case EXTCAP_ARG_UNSIGNED:
- printf("unsigned\n");
- break;
- case EXTCAP_ARG_LONG:
- printf("long\n");
- break;
- case EXTCAP_ARG_DOUBLE:
- printf("double\n");
- break;
- case EXTCAP_ARG_BOOLEAN:
- printf("boolean\n");
- break;
- case EXTCAP_ARG_MENU:
- printf("menu\n");
- break;
- case EXTCAP_ARG_RADIO:
- printf("radio\n");
- break;
- case EXTCAP_ARG_SELECTOR:
- printf("selctor\n");
- break;
- case EXTCAP_ARG_STRING:
- printf ( "string\n" );
- break;
- case EXTCAP_ARG_MULTICHECK:
- printf ( "unknown\n" );
- break;
- case EXTCAP_ARG_UNKNOWN:
- printf ( "unknown\n" );
- break;
- }
-
- if (arg_iter->range_start != NULL && arg_iter->range_end != NULL) {
- printf("\tRange: ");
- extcap_printf_complex(arg_iter->range_start);
- printf(" - ");
- extcap_printf_complex(arg_iter->range_end);
- printf("\n");
- }
-
- for ( walker = g_list_first ( arg_iter->value_list ); walker; walker = walker->next )
- {
- v = (extcap_value *)walker->data;
- if (v->is_default == TRUE)
- printf("*");
- printf("\tcall=\"%p\" display=\"%p\"\n", v->call, v->display);
- printf("\tcall=\"%s\" display=\"%s\"\n", v->call, v->display);
- }
-
- arg_iter = arg_iter->next_arg;
- }
-}
-#endif
-#endif
-
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*