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/* tap-hosts.c
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
/* Dump our collected IPv4- and IPv6-to-hostname mappings */
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include "globals.h"
#include <epan/packet.h>
#include <epan/tap.h>
#include <epan/stat_tap_ui.h>
#include <epan/addr_resolv.h>
#include <wsutil/cmdarg_err.h>
void register_tap_listener_hosts(void);
static gboolean dump_v4 = FALSE;
static gboolean dump_v6 = FALSE;
#define TAP_NAME "hosts"
static void
ipv4_hash_table_print_resolved(gpointer key _U_, gpointer value, gpointer user_data _U_)
{
hashipv4_t *ipv4_hash_table_entry = (hashipv4_t *)value;
if ((ipv4_hash_table_entry->flags & NAME_RESOLVED)) {
printf("%s\t%s\n",
ipv4_hash_table_entry->ip,
ipv4_hash_table_entry->name);
}
}
static void
ipv6_hash_table_print_resolved(gpointer key _U_, gpointer value, gpointer user_data _U_)
{
hashipv6_t *ipv6_hash_table_entry = (hashipv6_t *)value;
if ((ipv6_hash_table_entry->flags & NAME_RESOLVED)) {
printf("%s\t%s\n",
ipv6_hash_table_entry->ip6,
ipv6_hash_table_entry->name);
}
}
static void
hosts_draw(void *dummy _U_)
{
wmem_map_t *ipv4_hash_table;
wmem_map_t *ipv6_hash_table;
printf("# TShark hosts output\n");
printf("#\n");
printf("# Host data gathered from %s\n",
cfile.is_tempfile ? "the temporary capture file" : cfile.filename);
printf("\n");
if (dump_v4) {
ipv4_hash_table = get_ipv4_hash_table();
if (ipv4_hash_table) {
wmem_map_foreach( ipv4_hash_table, ipv4_hash_table_print_resolved, NULL);
}
}
if (dump_v6) {
ipv6_hash_table = get_ipv6_hash_table();
if (ipv6_hash_table) {
wmem_map_foreach( ipv6_hash_table, ipv6_hash_table_print_resolved, NULL);
}
}
}
static void
hosts_init(const char *opt_arg, void *userdata _U_)
{
GString *error_string;
gchar **tokens;
gint opt_count;
dump_v4 = FALSE;
dump_v6 = FALSE;
if (strcmp(TAP_NAME, opt_arg) == 0) {
/* No arguments; dump everything */
dump_v4 = TRUE;
dump_v6 = TRUE;
} else {
tokens = g_strsplit(opt_arg, ",", 0);
opt_count = 0;
while (tokens[opt_count]) {
if ((strcmp("ipv4", tokens[opt_count]) == 0) ||
(strcmp("ip", tokens[opt_count]) == 0)) {
dump_v4 = TRUE;
} else if (strcmp("ipv6", tokens[opt_count]) == 0) {
dump_v6 = TRUE;
} else if (opt_count > 0) {
cmdarg_err("invalid \"-z " TAP_NAME "[,ip|ipv4|ipv6]\" argument");
exit(1);
}
opt_count++;
}
g_strfreev(tokens);
}
error_string = register_tap_listener("frame", NULL, NULL, TL_REQUIRES_PROTO_TREE,
NULL, NULL, hosts_draw, NULL);
if (error_string) {
/* error, we failed to attach to the tap. clean up */
cmdarg_err("Couldn't register " TAP_NAME " tap: %s",
error_string->str);
g_string_free(error_string, TRUE);
exit(1);
}
}
static stat_tap_ui hosts_ui = {
REGISTER_STAT_GROUP_GENERIC,
NULL,
TAP_NAME,
hosts_init,
0,
NULL
};
void
register_tap_listener_hosts(void)
{
register_stat_tap_ui(&hosts_ui, NULL);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
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