iptables-1.3.2-20050720

[iptables.git] / extensions / libipt_ROUTE.c

diff --git a/extensions/libipt_ROUTE.c b/extensions/libipt_ROUTE.c
index 1cb3e89..360f983 100644 (file)
--- a/extensions/libipt_ROUTE.c
+++ b/extensions/libipt_ROUTE.c
@@ -1,6 +1,6 @@
 /* Shared library add-on to iptables to add ROUTE target support.
  * Author : Cedric de Launois, <delaunois@info.ucl.ac.be>
- * v 1.8 2003/06/24
+ * v 1.11 2004/11/23
  */
 
 #include <stdio.h>
@@ -15,19 +15,27 @@
 #include <linux/netfilter_ipv4/ip_tables.h>
 #include <linux/netfilter_ipv4/ipt_ROUTE.h>
 
+/* compile IPT_ROUTE_TEE support even if kernel headers are unpatched */
+#ifndef IPT_ROUTE_TEE
+#define IPT_ROUTE_TEE          0x02
+#endif
+
 /* Function which prints out usage message. */
 static void
 help(void)
 {
        printf(
 "ROUTE target v%s options:\n"
-"    --oif   \tifname \t\tRoute the packet through `ifname' network interface\n"
-"    --iif   \tifname \t\tChange the packet's incoming interface to `ifname'\n"
-"    --gw    \tip     \t\tRoute the packet via this gateway\n"
-"    --continue\t     \t\tRoute the packet and continue traversing the\n"
-"            \t       \t\trules. Not valid with --iif.\n"
+"    --oif   \tifname \t\tRoute packet through `ifname' network interface\n"
+"    --iif   \tifname \t\tChange packet's incoming interface to `ifname'\n"
+"    --gw    \tip     \t\tRoute packet via this gateway `ip'\n"
+"    --continue\t     \t\tRoute packet and continue traversing the\n"
+"            \t       \t\trules. Not valid with --iif or --tee.\n"
+"    --tee\t  \t\tDuplicate packet, route the duplicate,\n"
+"            \t       \t\tcontinue traversing with original packet.\n"
+"            \t       \t\tNot valid with --iif or --continue.\n"
 "\n",
-"1.8");
+"1.11");
 }
 
 static struct option opts[] = {
@@ -35,6 +43,7 @@ static struct option opts[] = {
        { "iif", 1, 0, '2' },
        { "gw", 1, 0, '3' },
        { "continue", 0, 0, '4' },
+       { "tee", 0, 0, '5' },
        { 0 }
 };
 
@@ -56,6 +65,7 @@ init(struct ipt_entry_target *t, unsigned int *nfcache)
 #define IPT_ROUTE_OPT_IIF      0x02
 #define IPT_ROUTE_OPT_GW       0x04
 #define IPT_ROUTE_OPT_CONTINUE 0x08
+#define IPT_ROUTE_OPT_TEE      0x10
 
 /* Function which parses command options; returns true if it
    ate an option */
@@ -134,12 +144,28 @@ parse(int c, char **argv, int invert, unsigned int *flags,
                if (*flags & IPT_ROUTE_OPT_CONTINUE)
                        exit_error(PARAMETER_PROBLEM,
                                   "Can't specify --continue twice");
+               if (*flags & IPT_ROUTE_OPT_TEE)
+                       exit_error(PARAMETER_PROBLEM,
+                                  "Can't specify --continue AND --tee");
 
                route_info->flags |= IPT_ROUTE_CONTINUE;
                *flags |= IPT_ROUTE_OPT_CONTINUE;
 
                break;
 
+       case '5':
+               if (*flags & IPT_ROUTE_OPT_TEE)
+                       exit_error(PARAMETER_PROBLEM,
+                                  "Can't specify --tee twice");
+               if (*flags & IPT_ROUTE_OPT_CONTINUE)
+                       exit_error(PARAMETER_PROBLEM,
+                                  "Can't specify --tee AND --continue");
+
+               route_info->flags |= IPT_ROUTE_TEE;
+               *flags |= IPT_ROUTE_OPT_TEE;
+
+               break;
+
        default:
                return 0;
        }
@@ -155,7 +181,7 @@ final_check(unsigned int flags)
                exit_error(PARAMETER_PROBLEM,
                           "ROUTE target: oif, iif or gw option required");
 
-       if ((flags & IPT_ROUTE_OPT_CONTINUE) && (flags & IPT_ROUTE_OPT_IIF))
+       if ((flags & (IPT_ROUTE_OPT_CONTINUE|IPT_ROUTE_OPT_TEE)) && (flags & IPT_ROUTE_OPT_IIF))
                exit_error(PARAMETER_PROBLEM,
                           "ROUTE target: can't continue traversing the rules with iif option");
 }
@@ -186,6 +212,9 @@ print(const struct ipt_ip *ip,
        if (route_info->flags & IPT_ROUTE_CONTINUE)
                printf("continue");
 
+       if (route_info->flags & IPT_ROUTE_TEE)
+               printf("tee");
+
 }
 
 
@@ -208,23 +237,25 @@ static void save(const struct ipt_ip *ip,
 
        if (route_info->flags & IPT_ROUTE_CONTINUE)
                printf("--continue ");
+
+       if (route_info->flags & IPT_ROUTE_TEE)
+               printf("--tee ");
 }
 
 
-static
-struct iptables_target route
-= { NULL,
-    "ROUTE",
-    IPTABLES_VERSION,
-    IPT_ALIGN(sizeof(struct ipt_route_target_info)),
-    IPT_ALIGN(sizeof(struct ipt_route_target_info)),
-    &help,
-    &init,
-    &parse,
-    &final_check,
-    &print,
-    &save,
-    opts
+static struct iptables_target route = { 
+       .next           = NULL,
+       .name           = "ROUTE",
+       .version        = IPTABLES_VERSION,
+       .size           = IPT_ALIGN(sizeof(struct ipt_route_target_info)),
+       .userspacesize  = IPT_ALIGN(sizeof(struct ipt_route_target_info)),
+       .help           = &help,
+       .init           = &init,
+       .parse          = &parse,
+       .final_check    = &final_check,
+       .print          = &print,
+       .save           = &save,
+       .extra_opts     = opts
 };
 
 void _init(void)