Clean up network header stuff and make it more generic. Use

libdnet when we can instead of our own home grown stuff.

SConscript:
    separate the crc code into its own file
base/inet.cc:
    move the crc stuff to crc.cc
    add generic code for calculating ip/tcp/udp checksums
base/inet.hh:
    -  move crc stuff to crc.hh
    -  #include all of the libdnet stuff.  (this makes base/inet.hh the
    only file you need to include if you want to use this kind of stuff.)
    -  Wrap some of the libdnet structs to get easier access to structure
    members.  These wrappers will automatically deal with masking/shifting/
    byte-swapping.
base/refcnt.hh:
    If one derives from RefCountingPtr, they should have access to
    the internal data pointer.
build/SConstruct:
    make #include of dnet stuff work
dev/etherlink.cc:
dev/ethertap.cc:
dev/ethertap.hh:
    EtherPacket -> PacketData
dev/etherpkt.cc:
    EtherPacket -> PacketData
    add a function for populating extra info about a packet.
    Basically just gives pointers to ethernet/ip/tcp/udp headers
    if they exist.
dev/etherpkt.hh:
    EtherPacket -> PacketData
    remove most of the packet header stuff from teh PacketData
    class and just add a few generic functions for grabbing various
    headers that may exist in the packet.  The old functionality is
    contained in the headers.
dev/ns_gige.cc:
    -  IP -> Ip, UDP -> Udp, TCP ->Tcp when used in variable names
    -  get rid of our own byte swapping functions.
    -  whack checksum code and use libdnet version.
    -  Get pointers to the various packet headers and grab info from
    those headers.  (The byte swapping in the headers now.)
    -  Add stats for Udp Checksums
dev/ns_gige.hh:
    use libdnet for checksum code.
    IP -> Ip, TCP -> Tcp in variable names
    add stats for UDP checksums

--HG--
extra : convert_revision : 96c4160e1967b7c0090acd456df4a76e1f3aab53

1 files changed, 25 insertions, 3 deletions

diff --git a/dev/etherpkt.cc b/dev/etherpkt.cc
index 9eda89e9d..292fe7faf 100644
--- a/dev/etherpkt.cc
+++ b/dev/etherpkt.cc
@@ -34,17 +34,39 @@
 using namespace std;
 
 void
-EtherPacket::serialize(ostream &os)
+PacketData::doext()
+{
+    _eth = 0;
+    _ip = 0;
+    _tcp = 0;
+    _udp = 0;
+
+    if (!data)
+        return;
+
+    _eth = data;
+    if (eth()->type() == ETH_TYPE_IP) {
+        _ip = eth()->payload();
+
+        if (ip()->proto() == IP_PROTO_TCP)
+            _tcp = ip()->payload();
+
+        if (ip()->proto() == IP_PROTO_UDP)
+            _udp = ip()->payload();
+    }
+}
+
+void
+PacketData::serialize(ostream &os)
 {
     SERIALIZE_SCALAR(length);
     SERIALIZE_ARRAY(data, length);
 }
 
 void
-EtherPacket::unserialize(Checkpoint *cp, const string &section)
+PacketData::unserialize(Checkpoint *cp, const string &section)
 {
     UNSERIALIZE_SCALAR(length);
     data = new uint8_t[length];
     UNSERIALIZE_ARRAY(data, length);
 }
-