forked from osmocom/wireshark
![Gerald Combs](/assets/img/avatar_default.png)
Make the netfilter rules more sensible as described in bug 2482. Switch to long names while we're here. Ping-bug: 2482 Change-Id: I9e44c4ed88ed83ff1d7d478acea83fa0c2af5cac Reviewed-on: https://code.wireshark.org/review/15701 Reviewed-by: Gerald Combs <gerald@wireshark.org> Petri-Dish: Gerald Combs <gerald@wireshark.org> Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org> Reviewed-by: Jaap Keuter <jaap.keuter@xs4all.nl>
293 lines
13 KiB
C
293 lines
13 KiB
C
/* firewall_rules_dlg.c
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/*
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* Generate firewall ACL rules based on packet addresses and ports.
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* For directional rules, an outside interface is assumed.
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*
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* There may be better ways to present the information, e.g. all rules
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* in one huge text window, or some sort of tree view.
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*/
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/*
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* To add a new product, add syntax functions modify the products[] array.
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*
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* To add a new syntax function, add its prototype above the products[]
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* array, and add the function below with all the others.
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*/
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/* Copied from gtk/firewall_rules.c */
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#include "config.h"
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#include <glib.h>
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#include "epan/address.h"
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#include "firewall_rules.h"
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static void sf_ipfw_mac(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny);
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static void sf_netfilter_mac(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny);
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static void sf_ios_std_ipv4(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny);
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static void sf_ios_ext_ipv4(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny);
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static void sf_ipfilter_ipv4(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny);
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static void sf_ipfw_ipv4(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny);
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static void sf_netfilter_ipv4(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny);
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static void sf_pf_ipv4(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny);
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/* XXX - Can you addresses-only filters using WFW/netsh? */
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static void sf_ios_ext_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny);
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static void sf_ipfilter_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny);
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static void sf_ipfw_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny);
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static void sf_netfilter_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny);
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static void sf_pf_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny);
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static void sf_netsh_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny);
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static void sf_ios_ext_ipv4_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny);
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static void sf_ipfilter_ipv4_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny);
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static void sf_ipfw_ipv4_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny);
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static void sf_netfilter_ipv4_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny);
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static void sf_pf_ipv4_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny);
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static void sf_netsh_ipv4_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny);
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typedef struct _fw_product_t {
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const char *name;
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const char *rule_hint;
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const char *comment_pfx;
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syntax_func mac_func;
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syntax_func ipv4_func;
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syntax_func port_func;
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syntax_func ipv4_port_func;
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gboolean does_inbound;
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} fw_product;
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static fw_product products[] = {
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{ "Cisco IOS (standard)", "Change NUMBER to a valid ACL number.", "!",
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NULL, sf_ios_std_ipv4, NULL, NULL, FALSE },
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{ "Cisco IOS (extended)", "Change NUMBER to a valid ACL number.", "!",
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NULL, sf_ios_ext_ipv4, sf_ios_ext_port, sf_ios_ext_ipv4_port, TRUE },
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{ "IP Filter (ipfilter)", "Change le0 to a valid interface if needed.", "#",
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NULL, sf_ipfilter_ipv4, sf_ipfilter_port, sf_ipfilter_ipv4_port, TRUE },
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{ "IPFirewall (ipfw)", "", "#",
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sf_ipfw_mac, sf_ipfw_ipv4, sf_ipfw_port, sf_ipfw_ipv4_port, TRUE },
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{ "Netfilter (iptables)", "Change eth0 to a valid interface if needed.", "#",
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sf_netfilter_mac, sf_netfilter_ipv4, sf_netfilter_port,
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sf_netfilter_ipv4_port, TRUE },
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{ "Packet Filter (pf)", "$ext_if should be set to a valid interface.", "#",
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NULL, sf_pf_ipv4, sf_pf_port, sf_pf_ipv4_port, TRUE },
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{ "Windows Firewall (netsh)", "", "#",
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NULL, NULL, sf_netsh_port, sf_netsh_ipv4_port, FALSE }
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};
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#define NUM_PRODS (sizeof(products) / sizeof(fw_product))
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size_t firewall_product_count(void)
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{
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return NUM_PRODS;
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}
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const char *firewall_product_name(size_t product_idx)
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{
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if (product_idx >= NUM_PRODS) return "Unknown";
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return products[product_idx].name;
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}
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const char *firewall_product_rule_hint(size_t product_idx)
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{
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if (product_idx >= NUM_PRODS) return "";
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return products[product_idx].rule_hint;
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}
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const char *firewall_product_comment_prefix(size_t product_idx)
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{
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if (product_idx >= NUM_PRODS) return "";
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return products[product_idx].comment_pfx;
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}
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syntax_func firewall_product_mac_func(size_t product_idx)
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{
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if (product_idx >= NUM_PRODS) return NULL;
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return products[product_idx].mac_func;
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}
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syntax_func firewall_product_ipv4_func(size_t product_idx)
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{
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if (product_idx >= NUM_PRODS) return NULL;
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return products[product_idx].ipv4_func;
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}
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syntax_func firewall_product_port_func(size_t product_idx)
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{
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if (product_idx >= NUM_PRODS) return NULL;
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return products[product_idx].port_func;
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}
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syntax_func firewall_product_ipv4_port_func(size_t product_idx)
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{
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if (product_idx >= NUM_PRODS) return NULL;
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return products[product_idx].ipv4_port_func;
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}
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gboolean firewall_product_does_inbound(size_t product_idx)
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{
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if (product_idx >= NUM_PRODS) return FALSE;
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return products[product_idx].does_inbound;
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}
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/* MAC */
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#define IPFW_DENY (deny ? "deny" : "allow")
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#define IPFW_IN (inbound ? "in" : "out")
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static void sf_ipfw_mac(GString *rtxt, gchar *addr, guint32 port _U_, port_type ptype _U_, gboolean inbound, gboolean deny) {
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g_string_append_printf(rtxt, "add %s MAC %s any %s",
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IPFW_DENY, addr, IPFW_IN);
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}
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#define NF_DROP (deny ? "DROP" : "ACCEPT")
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#define NF_INPUT (inbound ? "INPUT" : "OUTPUT")
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static void sf_netfilter_mac(GString *rtxt, gchar *addr, guint32 port _U_, port_type ptype _U_, gboolean inbound, gboolean deny) {
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g_string_append_printf(rtxt, "iptables --append %s --in-interface eth0 --mac-source %s --jump %s",
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NF_INPUT, addr, NF_DROP);
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}
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/* IPv4 */
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#define IOS_DENY (deny ? "deny" : "permit")
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static void sf_ios_std_ipv4(GString *rtxt, gchar *addr, guint32 port _U_, port_type ptype _U_, gboolean inbound _U_, gboolean deny) {
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g_string_append_printf(rtxt, "access-list NUMBER %s host %s", IOS_DENY, addr);
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}
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static void sf_ios_ext_ipv4(GString *rtxt, gchar *addr, guint32 port _U_, port_type ptype _U_, gboolean inbound, gboolean deny) {
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if (inbound)
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g_string_append_printf(rtxt, "access-list NUMBER %s ip host %s any", IOS_DENY, addr);
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else
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g_string_append_printf(rtxt, "access-list NUMBER %s ip any host %s", IOS_DENY, addr);
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}
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#define IPFILTER_DENY (deny ? "block" : "pass")
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#define IPFILTER_IN (inbound ? "in" : "out")
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static void sf_ipfilter_ipv4(GString *rtxt, gchar *addr, guint32 port _U_, port_type ptype _U_, gboolean inbound, gboolean deny) {
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g_string_append_printf(rtxt, "%s %s on le0 from %s to any",
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IPFILTER_DENY, IPFILTER_IN, addr);
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}
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static void sf_ipfw_ipv4(GString *rtxt, gchar *addr, guint32 port _U_, port_type ptype _U_, gboolean inbound, gboolean deny) {
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g_string_append_printf(rtxt, "add %s ip from %s to any %s",
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IPFW_DENY, addr, IPFW_IN);
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}
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#define NF_ADDR_DIR (inbound ? "--source" : "--destination")
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static void sf_netfilter_ipv4(GString *rtxt, gchar *addr, guint32 port _U_, port_type ptype _U_, gboolean inbound, gboolean deny) {
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g_string_append_printf(rtxt, "iptables --append %s --in-interface eth0 %s %s/32 --jump %s",
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NF_INPUT, NF_ADDR_DIR, addr, NF_DROP);
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}
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#define PF_DENY (deny ? "block" : "pass")
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#define PF_IN (inbound ? "in" : "out")
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static void sf_pf_ipv4(GString *rtxt, gchar *addr, guint32 port _U_, port_type ptype _U_, gboolean inbound, gboolean deny) {
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g_string_append_printf(rtxt, "%s %s quick on $ext_if from %s to any",
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PF_DENY, PF_IN, addr);
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}
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/* Port */
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#define RT_TCP_UDP (ptype == PT_TCP ? "tcp" : "udp")
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static void sf_ios_ext_port(GString *rtxt, gchar *addr _U_, guint32 port, port_type ptype, gboolean inbound _U_, gboolean deny) {
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g_string_append_printf(rtxt, "access-list NUMBER %s %s any any eq %u",
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IOS_DENY, RT_TCP_UDP, port);
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}
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static void sf_ipfilter_port(GString *rtxt, gchar *addr _U_, guint32 port, port_type ptype _U_, gboolean inbound, gboolean deny) {
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g_string_append_printf(rtxt, "%s %s on le0 proto %s from any to any port = %u",
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IPFILTER_DENY, IPFILTER_IN, RT_TCP_UDP, port);
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}
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static void sf_ipfw_port(GString *rtxt, gchar *addr _U_, guint32 port, port_type ptype, gboolean inbound, gboolean deny) {
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g_string_append_printf(rtxt, "add %s %s from any to any %u %s",
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IPFW_DENY, RT_TCP_UDP, port, IPFW_IN);
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}
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#define NF_PORT_DIR (inbound ? "--source-port" : "--destination-port")
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static void sf_netfilter_port(GString *rtxt, gchar *addr _U_, guint32 port, port_type ptype, gboolean inbound, gboolean deny) {
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g_string_append_printf(rtxt, "iptables --append %s --in-interface eth0 --protocol %s %s %u --jump %s",
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NF_INPUT, RT_TCP_UDP, NF_PORT_DIR, port, NF_DROP);
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}
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static void sf_pf_port(GString *rtxt, gchar *addr _U_, guint32 port, port_type ptype, gboolean inbound, gboolean deny) {
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g_string_append_printf(rtxt, "%s %s quick on $ext_if proto %s from any to any port %u",
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PF_DENY, PF_IN, RT_TCP_UDP, port);
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}
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#define NETSH_DENY (deny ? "DISABLE" : "ENABLE")
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static void sf_netsh_port(GString *rtxt, gchar *addr _U_, guint32 port, port_type ptype, gboolean inbound _U_, gboolean deny) {
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g_string_append_printf(rtxt, "add portopening %s %u Wireshark %s",
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RT_TCP_UDP, port, NETSH_DENY);
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}
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/* IPv4 + port */
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static void sf_ios_ext_ipv4_port(GString *rtxt, gchar *addr, guint32 port _U_, port_type ptype _U_, gboolean inbound, gboolean deny) {
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if (inbound)
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g_string_append_printf(rtxt, "access-list NUMBER %s %s host %s any eq %u", IOS_DENY, RT_TCP_UDP, addr, port);
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else
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g_string_append_printf(rtxt, "access-list NUMBER %s %s any host %s eq %u", IOS_DENY, RT_TCP_UDP, addr, port);
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}
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static void sf_ipfilter_ipv4_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny) {
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if (inbound)
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g_string_append_printf(rtxt, "%s %s on le0 proto %s from %s to any port = %u",
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IPFILTER_DENY, IPFILTER_IN, RT_TCP_UDP, addr, port);
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else
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g_string_append_printf(rtxt, "%s %s on le0 proto %s from any to %s port = %u",
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IPFILTER_DENY, IPFILTER_IN, RT_TCP_UDP, addr, port);
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}
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static void sf_ipfw_ipv4_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny) {
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g_string_append_printf(rtxt, "add %s %s from %s to any %u %s",
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IPFW_DENY, RT_TCP_UDP, addr, port, IPFW_IN);
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}
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static void sf_pf_ipv4_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny) {
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g_string_append_printf(rtxt, "%s %s quick on $ext_if proto %s from %s to any port %u",
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PF_DENY, PF_IN, RT_TCP_UDP, addr, port);
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}
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static void sf_netfilter_ipv4_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny) {
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g_string_append_printf(rtxt, "iptables --append %s --in-interface eth0 --protocol %s %s %s/32 %s %u --jump %s",
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NF_INPUT, RT_TCP_UDP, NF_ADDR_DIR, addr, NF_PORT_DIR, port, NF_DROP);
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}
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static void sf_netsh_ipv4_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound _U_, gboolean deny) {
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g_string_append_printf(rtxt, "add portopening %s %u Wireshark %s %s",
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RT_TCP_UDP, port, NETSH_DENY, addr);
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}
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/*
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* Editor modelines - http://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: 8
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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=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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