From 5f8123d7e45d925739a84eb208da2eb8edcd4179 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@anytun.org>
Date: Wed, 27 Feb 2008 22:50:01 +0000
Subject: added get Src/Dst Address @ plainPacket

---
 anytun.cpp      |  3 ---
 plainPacket.cpp | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 plainPacket.h   |  8 ++++++++
 3 files changed, 67 insertions(+), 4 deletions(-)

diff --git a/anytun.cpp b/anytun.cpp
index c1181f1..acf86c9 100644
--- a/anytun.cpp
+++ b/anytun.cpp
@@ -66,9 +66,6 @@
 
 #include "threadParam.h"
 
-#define PAYLOAD_TYPE_TAP 0x6558
-#define PAYLOAD_TYPE_TUN 0x0800
-
 #define MAX_PACKET_LENGTH 1600
 
 #define SESSION_KEYLEN_AUTH 20   // TODO: hardcoded size
diff --git a/plainPacket.cpp b/plainPacket.cpp
index 37c4338..1789854 100644
--- a/plainPacket.cpp
+++ b/plainPacket.cpp
@@ -31,11 +31,13 @@
 #include <stdexcept>
 #include <iostream>
 #include <arpa/inet.h>
+#include <net/ethernet.h>
+#include <netinet/ip.h>
+#include <netinet/ip6.h>
 
 #include "datatypes.h"
 #include "plainPacket.h"
 
-
 PlainPacket::PlainPacket(u_int32_t payload_length, bool allow_realloc) : Buffer(payload_length + sizeof(payload_type_t), allow_realloc)
 {
   payload_type_ = reinterpret_cast<payload_type_t*>(buf_);
@@ -80,3 +82,59 @@ u_int8_t* PlainPacket::getPayload()
 {
   return payload_;
 }
+
+
+NetworkAddress PlainPacket::getSrcAddr() const
+{
+  if(!payload_type_ || !payload_)
+    return NetworkAddress();
+
+  if(PAYLOAD_TYPE_TAP) // Ehternet
+  {
+        // TODO
+    return NetworkAddress();
+  }
+  else if(PAYLOAD_TYPE_TUN) // IPv4
+  {
+    if(length_ < (sizeof(payload_type_t)+sizeof(struct ip)))
+      return NetworkAddress();
+    struct ip* hdr = reinterpret_cast<struct ip*>(payload_);
+    return NetworkAddress(hdr->ip_src);
+  }
+  else if(PAYLOAD_TYPE_TUN6) // IPv6
+  {
+    if(length_ < (sizeof(payload_type_t)+sizeof(struct ip6_hdr)))
+      return NetworkAddress();
+    struct ip6_hdr* hdr = reinterpret_cast<struct ip6_hdr*>(payload_);
+    return NetworkAddress(hdr->ip6_dst);
+  }
+  return NetworkAddress();
+}
+
+
+NetworkAddress PlainPacket::getDstAddr() const
+{
+  if(!payload_type_ || !payload_)
+    return NetworkAddress();
+
+  if(PAYLOAD_TYPE_TAP) // Ehternet
+  {
+        // TODO
+    return NetworkAddress();
+  }
+  else if(PAYLOAD_TYPE_TUN) // IPv4
+  {
+    if(length_ < (sizeof(payload_type_t)+sizeof(struct ip)))
+      return NetworkAddress();
+    struct ip* hdr = reinterpret_cast<struct ip*>(payload_);
+    return NetworkAddress(hdr->ip_dst);
+  }
+  else if(PAYLOAD_TYPE_TUN6) // IPv6
+  {
+    if(length_ < (sizeof(payload_type_t)+sizeof(struct ip6_hdr)))
+      return NetworkAddress();
+    struct ip6_hdr* hdr = reinterpret_cast<struct ip6_hdr*>(payload_);
+    return NetworkAddress(hdr->ip6_dst);
+  }
+  return NetworkAddress();
+}
diff --git a/plainPacket.h b/plainPacket.h
index e44df32..03ae507 100644
--- a/plainPacket.h
+++ b/plainPacket.h
@@ -34,12 +34,18 @@
 #include "datatypes.h"
 #include "buffer.h"
 
+#include "networkAddress.h"
+
 class Cipher;
 /**
  * plain SATP packet class<br>
  * includes payload_type and payload
  */
 
+#define PAYLOAD_TYPE_TAP 0x6558
+#define PAYLOAD_TYPE_TUN 0x0800
+#define PAYLOAD_TYPE_TUN6 0x86DD 
+
 class PlainPacket : public Buffer
 {
 public:
@@ -85,6 +91,8 @@ public:
    */
   u_int8_t* getPayload();
 
+  NetworkAddress getSrcAddr() const;
+  NetworkAddress getDstAddr() const;
 
 private:
   PlainPacket();
-- 
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