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);
+}