output traffic is now masqueraded depending on EPC config file if epc run on...

output traffic is now masqueraded depending on EPC config file if epc run on same host than eNB.!!@@@###%&!?!!!

git-svn-id: http://svn.eurecom.fr/openair4G/trunk@6250 818b1a75-f10b-46b9-bf7c-635c3b92a50f

openair-cn/GTPV1-U/GTPURH/xt_GTPURH.c

@@ -18,9 +18,9 @@
 #include <linux/ip.h>
 #include <linux/route.h> 
 #include <net/checksum.h>
+#include <net/ip.h>
 #include <net/udp.h>
 #include <net/inet_sock.h>
-#include <net/ip.h>
 #include <net/route.h> 
 #include <linux/netfilter/x_tables.h>
 #include <linux/netfilter_ipv4/ip_tables.h>
@@ -29,7 +29,7 @@
 #endif
 
 
-#define ROUTE_PACKET 1
+//#define ROUTE_PACKET 1
 
 #include "xt_GTPURH.h"
 
@@ -369,8 +369,8 @@ static bool _gtpurh_route_packet(struct sk_buff *skb_pP, const struct xt_gtpurh_
             } 
         } 
     }; 
-    skb_pP->pkt_type = PACKET_OTHERHOST;
-
+    //skb_pP->pkt_type = PACKET_OTHERHOST;
+    skb_pP->pkt_type = PACKET_OUTGOING;
 #if 1
     pr_info("GTPURH(%d): Routing packet: %d.%d.%d.%d --> %d.%d.%d.%d Proto: %d, Len: %d Mark: %u Packet type: %u\n",
             info_pP->action,
@@ -696,13 +696,44 @@ _gtpurh_target_rem(struct sk_buff *orig_skb_pP, const struct xt_gtpurh_target_in
         }
     }
 //#endif
-    pr_info("GTPURH(%d) IP packet prcessed\n",tgi_pP->action);
+    pr_info("GTPURH(%d) IP packet processed\n",tgi_pP->action);
 
     /* Route the packet */
 #if defined(ROUTE_PACKET)
     _gtpurh_route_packet(skb_p, tgi_pP);
     return NF_DROP;
 #else
+    {
+        int            err = 0;
+        struct rtable *rt    = NULL;
+        int            daddr = iph2_p->daddr;
+        struct flowi   fl    = {
+                        .u = {
+                            .ip4 = {
+                                .daddr        = daddr,
+                                .flowi4_tos   = RT_TOS(iph2_p->tos),
+                                .flowi4_scope = RT_SCOPE_UNIVERSE,
+                            }
+                        }
+        };
+        rt = ip_route_output_key(&init_net, &fl.u.ip4);
+        if (rt == NULL)
+        {
+            pr_info("GTPURH: Failed to route packet to dst 0x%x. Error: (%d)", fl.u.ip4.daddr, err);
+            return NF_DROP;
+        }
+
+#if 1
+        if (rt->dst.dev) {
+            pr_info("GTPURH: dst dev name %s\n", rt->dst.dev->name);
+        } else {
+            pr_info("GTPURH: dst dev NULL\n");
+        }
+#endif
+        skb_dst_drop(skb_p);
+        skb_dst_set(skb_p, &rt->dst);
+        skb_p->dev      = skb_dst(skb_p)->dev;
+    }
     return NF_ACCEPT;
 #endif
 }