diff options
Diffstat (limited to 'ui/firewall_rules.c')
-rw-r--r-- | ui/firewall_rules.c | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/ui/firewall_rules.c b/ui/firewall_rules.c new file mode 100644 index 0000000..3ddc31b --- /dev/null +++ b/ui/firewall_rules.c @@ -0,0 +1,282 @@ +/* firewall_rules_dlg.c + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +/* + * Generate firewall ACL rules based on packet addresses and ports. + * For directional rules, an outside interface is assumed. + * + * There may be better ways to present the information, e.g. all rules + * in one huge text window, or some sort of tree view. + */ + +/* + * To add a new product, add syntax functions modify the products[] array. + * + * To add a new syntax function, add its prototype above the products[] + * array, and add the function below with all the others. + */ + + /* Copied from gtk/firewall_rules.c */ + +#include "config.h" + +#include <glib.h> + +#include "epan/address.h" + +#include "firewall_rules.h" + +static void sf_ipfw_mac(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny); +static void sf_netfilter_mac(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny); + +static void sf_ios_std_ipv4(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny); +static void sf_ios_ext_ipv4(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny); +static void sf_ipfilter_ipv4(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny); +static void sf_ipfw_ipv4(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny); +static void sf_netfilter_ipv4(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny); +static void sf_pf_ipv4(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny); +/* XXX - Can you addresses-only filters using WFW/netsh? */ + +static void sf_ios_ext_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny); +static void sf_ipfilter_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny); +static void sf_ipfw_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny); +static void sf_netfilter_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny); +static void sf_pf_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny); +static void sf_netsh_port_old(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny); +static void sf_netsh_port_new(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny); + +static void sf_ios_ext_ipv4_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny); +static void sf_ipfilter_ipv4_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny); +static void sf_ipfw_ipv4_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny); +static void sf_netfilter_ipv4_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny); +static void sf_pf_ipv4_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny); +static void sf_netsh_ipv4_port_old(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny); +static void sf_netsh_ipv4_port_new(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny); + +typedef struct _fw_product_t { + const char *name; + const char *rule_hint; + const char *comment_pfx; + syntax_func mac_func; + syntax_func ipv4_func; + syntax_func port_func; + syntax_func ipv4_port_func; + gboolean does_inbound; +} fw_product; + +static fw_product products[] = { + { "Cisco IOS (standard)", "Change NUMBER to a valid ACL number.", "!", + NULL, sf_ios_std_ipv4, NULL, NULL, FALSE }, + { "Cisco IOS (extended)", "Change NUMBER to a valid ACL number.", "!", + NULL, sf_ios_ext_ipv4, sf_ios_ext_port, sf_ios_ext_ipv4_port, TRUE }, + { "IP Filter (ipfilter)", "Change le0 to a valid interface if needed.", "#", + NULL, sf_ipfilter_ipv4, sf_ipfilter_port, sf_ipfilter_ipv4_port, TRUE }, + { "IPFirewall (ipfw)", "", "#", + sf_ipfw_mac, sf_ipfw_ipv4, sf_ipfw_port, sf_ipfw_ipv4_port, TRUE }, + { "Netfilter (iptables)", "Change eth0 to a valid interface if needed.", "#", + sf_netfilter_mac, sf_netfilter_ipv4, sf_netfilter_port, + sf_netfilter_ipv4_port, TRUE }, + { "Packet Filter (pf)", "$ext_if should be set to a valid interface.", "#", + NULL, sf_pf_ipv4, sf_pf_port, sf_pf_ipv4_port, TRUE }, + { "Windows Firewall (netsh old syntax)", "", "#", + NULL, NULL, sf_netsh_port_old, sf_netsh_ipv4_port_old, FALSE }, + { "Windows Firewall (netsh new syntax)", "", "#", + NULL, NULL, sf_netsh_port_new, sf_netsh_ipv4_port_new, FALSE } +}; +#define NUM_PRODS (sizeof(products) / sizeof(fw_product)) + + +size_t firewall_product_count(void) +{ + return NUM_PRODS; +} + +const char *firewall_product_name(size_t product_idx) +{ + if (product_idx >= NUM_PRODS) return "Unknown"; + return products[product_idx].name; +} + +const char *firewall_product_rule_hint(size_t product_idx) +{ + if (product_idx >= NUM_PRODS) return ""; + return products[product_idx].rule_hint; +} + +const char *firewall_product_comment_prefix(size_t product_idx) +{ + if (product_idx >= NUM_PRODS) return ""; + return products[product_idx].comment_pfx; +} + +syntax_func firewall_product_mac_func(size_t product_idx) +{ + if (product_idx >= NUM_PRODS) return NULL; + return products[product_idx].mac_func; +} + + +syntax_func firewall_product_ipv4_func(size_t product_idx) +{ + if (product_idx >= NUM_PRODS) return NULL; + return products[product_idx].ipv4_func; +} + + +syntax_func firewall_product_port_func(size_t product_idx) +{ + if (product_idx >= NUM_PRODS) return NULL; + return products[product_idx].port_func; +} + + +syntax_func firewall_product_ipv4_port_func(size_t product_idx) +{ + if (product_idx >= NUM_PRODS) return NULL; + return products[product_idx].ipv4_port_func; +} + +gboolean firewall_product_does_inbound(size_t product_idx) +{ + if (product_idx >= NUM_PRODS) return FALSE; + return products[product_idx].does_inbound; +} + + +/* MAC */ +#define IPFW_RULE(deny) ((deny) ? "deny" : "allow") +#define IPFW_DIR(inbound) ((inbound) ? "in" : "out") +static void sf_ipfw_mac(GString *rtxt, gchar *addr, guint32 port _U_, port_type ptype _U_, gboolean inbound, gboolean deny) { + g_string_append_printf(rtxt, "add %s MAC %s any %s", + IPFW_RULE(deny), addr, IPFW_DIR(inbound)); +} + +#define NF_RULE(deny) ((deny) ? "DROP" : "ACCEPT") +#define NF_DIR(inbound) ((inbound) ? "INPUT" : "OUTPUT") +static void sf_netfilter_mac(GString *rtxt, gchar *addr, guint32 port _U_, port_type ptype _U_, gboolean inbound, gboolean deny) { + g_string_append_printf(rtxt, "iptables --append %s --in-interface eth0 --mac-source %s --jump %s", + NF_DIR(inbound), addr, NF_RULE(deny)); +} + +/* IPv4 */ +#define IOS_RULE(deny) ((deny) ? "deny" : "permit") +static void sf_ios_std_ipv4(GString *rtxt, gchar *addr, guint32 port _U_, port_type ptype _U_, gboolean inbound _U_, gboolean deny) { + g_string_append_printf(rtxt, "access-list NUMBER %s host %s", IOS_RULE(deny), addr); +} + +static void sf_ios_ext_ipv4(GString *rtxt, gchar *addr, guint32 port _U_, port_type ptype _U_, gboolean inbound, gboolean deny) { + if (inbound) + g_string_append_printf(rtxt, "access-list NUMBER %s ip host %s any", IOS_RULE(deny), addr); + else + g_string_append_printf(rtxt, "access-list NUMBER %s ip any host %s", IOS_RULE(deny), addr); +} + +#define IPFILTER_RULE(deny) ((deny) ? "block" : "pass") +#define IPFILTER_DIR(inbound) ((inbound) ? "in" : "out") + +static void sf_ipfilter_ipv4(GString *rtxt, gchar *addr, guint32 port _U_, port_type ptype _U_, gboolean inbound, gboolean deny) { + g_string_append_printf(rtxt, "%s %s on le0 from %s to any", + IPFILTER_RULE(deny), IPFILTER_DIR(inbound), addr); +} + +static void sf_ipfw_ipv4(GString *rtxt, gchar *addr, guint32 port _U_, port_type ptype _U_, gboolean inbound, gboolean deny) { + g_string_append_printf(rtxt, "add %s ip from %s to any %s", + IPFW_RULE(deny), addr, IPFW_DIR(inbound)); +} + +#define NF_ADDR_DIR(inbound) ((inbound) ? "--source" : "--destination") +static void sf_netfilter_ipv4(GString *rtxt, gchar *addr, guint32 port _U_, port_type ptype _U_, gboolean inbound, gboolean deny) { + g_string_append_printf(rtxt, "iptables --append %s --in-interface eth0 %s %s/32 --jump %s", + NF_DIR(inbound), NF_ADDR_DIR(inbound), addr, NF_RULE(deny)); +} + +#define PF_RULE(deny) ((deny) ? "block" : "pass") +#define PF_DIR(inbound) ((inbound) ? "in" : "out") +static void sf_pf_ipv4(GString *rtxt, gchar *addr, guint32 port _U_, port_type ptype _U_, gboolean inbound, gboolean deny) { + g_string_append_printf(rtxt, "%s %s quick on $ext_if from %s to any", + PF_RULE(deny), PF_DIR(inbound), addr); +} + +/* Port */ +#define RT_TCP_UDP(ptype) ((ptype) == PT_TCP ? "tcp" : "udp") +static void sf_ios_ext_port(GString *rtxt, gchar *addr _U_, guint32 port, port_type ptype, gboolean inbound _U_, gboolean deny) { + g_string_append_printf(rtxt, "access-list NUMBER %s %s any any eq %u", + IOS_RULE(deny), RT_TCP_UDP(ptype), port); +} + +static void sf_ipfilter_port(GString *rtxt, gchar *addr _U_, guint32 port, port_type ptype, gboolean inbound, gboolean deny) { + g_string_append_printf(rtxt, "%s %s on le0 proto %s from any to any port = %u", + IPFILTER_RULE(deny), IPFILTER_DIR(inbound), RT_TCP_UDP(ptype), port); +} + +static void sf_ipfw_port(GString *rtxt, gchar *addr _U_, guint32 port, port_type ptype, gboolean inbound, gboolean deny) { + g_string_append_printf(rtxt, "add %s %s from any to any %u %s", + IPFW_RULE(deny), RT_TCP_UDP(ptype), port, IPFW_DIR(inbound)); +} + +#define NF_PORT_DIR(inbound) ((inbound) ? "--source-port" : "--destination-port") +static void sf_netfilter_port(GString *rtxt, gchar *addr _U_, guint32 port, port_type ptype, gboolean inbound, gboolean deny) { + g_string_append_printf(rtxt, "iptables --append %s --in-interface eth0 --protocol %s %s %u --jump %s", + NF_DIR(inbound), RT_TCP_UDP(ptype), NF_PORT_DIR(inbound), port, NF_RULE(deny)); +} + +static void sf_pf_port(GString *rtxt, gchar *addr _U_, guint32 port, port_type ptype, gboolean inbound, gboolean deny) { + g_string_append_printf(rtxt, "%s %s quick on $ext_if proto %s from any to any port %u", + PF_RULE(deny), PF_DIR(inbound), RT_TCP_UDP(ptype), port); +} + +#define NETSH_RULE_OLD(deny) ((deny) ? "DISABLE" : "ENABLE") +static void sf_netsh_port_old(GString *rtxt, gchar *addr _U_, guint32 port, port_type ptype, gboolean inbound _U_, gboolean deny) { + g_string_append_printf(rtxt, "add portopening %s %u Wireshark %s", + RT_TCP_UDP(ptype), port, NETSH_RULE_OLD(deny)); +} + +#define NETSH_RULE_NEW(deny) ((deny) ? "block" : "allow") +static void sf_netsh_port_new(GString *rtxt, gchar *addr _U_, guint32 port, port_type ptype, gboolean inbound _U_, gboolean deny) { + g_string_append_printf(rtxt, "add rule name=\"Wireshark\" dir=in action=%s protocol=%s localport=%u", + NETSH_RULE_NEW(deny), RT_TCP_UDP(ptype), port); +} + +/* IPv4 + port */ +static void sf_ios_ext_ipv4_port(GString *rtxt, gchar *addr, guint32 port _U_, port_type ptype, gboolean inbound, gboolean deny) { + if (inbound) + g_string_append_printf(rtxt, "access-list NUMBER %s %s host %s eq %u any", IOS_RULE(deny), RT_TCP_UDP(ptype), addr, port); + else + g_string_append_printf(rtxt, "access-list NUMBER %s %s any host %s eq %u", IOS_RULE(deny), RT_TCP_UDP(ptype), addr, port); +} + +static void sf_ipfilter_ipv4_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny) { + if (inbound) + g_string_append_printf(rtxt, "%s %s on le0 proto %s from %s port = %u to any", + IPFILTER_RULE(deny), IPFILTER_DIR(inbound), RT_TCP_UDP(ptype), addr, port); + else + g_string_append_printf(rtxt, "%s %s on le0 proto %s from any to %s port = %u", + IPFILTER_RULE(deny), IPFILTER_DIR(inbound), RT_TCP_UDP(ptype), addr, port); +} + +static void sf_ipfw_ipv4_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny) { + g_string_append_printf(rtxt, "add %s %s from %s %u to any %s", + IPFW_RULE(deny), RT_TCP_UDP(ptype), addr, port, IPFW_DIR(inbound)); +} + +static void sf_pf_ipv4_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny) { + g_string_append_printf(rtxt, "%s %s quick on $ext_if proto %s from %s to any port %u", + PF_RULE(deny), PF_DIR(inbound), RT_TCP_UDP(ptype), addr, port); +} + +static void sf_netfilter_ipv4_port(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound, gboolean deny) { + g_string_append_printf(rtxt, "iptables --append %s --in-interface eth0 --protocol %s %s %s/32 %s %u --jump %s", + NF_DIR(inbound), RT_TCP_UDP(ptype), NF_ADDR_DIR(inbound), addr, NF_PORT_DIR(inbound), port, NF_RULE(deny)); +} + +static void sf_netsh_ipv4_port_old(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound _U_, gboolean deny) { + g_string_append_printf(rtxt, "add portopening %s %u Wireshark %s %s", + RT_TCP_UDP(ptype), port, NETSH_RULE_OLD(deny), addr); +} + +static void sf_netsh_ipv4_port_new(GString *rtxt, gchar *addr, guint32 port, port_type ptype, gboolean inbound _U_, gboolean deny) { + g_string_append_printf(rtxt, "add rule name=\"Wireshark\" dir=in action=%s protocol=%s localport=%u remoteip=%s", + NETSH_RULE_NEW(deny), RT_TCP_UDP(ptype), port, addr); +} |