first pass at ns_ethernet device. more will come later as i merge in nate's new ether infrastructure.

dev/etherpkt.hh:
    add some stuff for support of the NS ethernet device.

--HG--
extra : convert_revision : 51f6508463b6394055e3428a42b7de490a9ae6c1

1 files changed, 68 insertions, 1 deletions

diff --git a/dev/etherpkt.hh b/dev/etherpkt.hh
index c91322526..312d98f64 100644
--- a/dev/etherpkt.hh
+++ b/dev/etherpkt.hh
@@ -36,11 +36,68 @@
 #include <memory>
 
 #include "sim/host.hh"
-
 #include "base/refcnt.hh"
 
+#define EADDR_LEN 6
+
 class Checkpoint;
 
+struct pseudo_header
+{
+    uint32_t src_ip_addr;
+    uint32_t dest_ip_addr;
+    uint16_t protocol;
+    uint16_t len;
+};
+
+/** Ethernet header struct for casting purposes */
+struct eth_header
+{
+    uint8_t dest[EADDR_LEN];
+    uint8_t src[EADDR_LEN];
+    uint16_t type;
+};
+
+struct ip_header
+{
+    uint8_t vers_len;
+    uint8_t service_type;
+    uint16_t dgram_len;
+    uint16_t ID;
+    uint16_t flags_frag_offset;
+    uint8_t TTL;
+    uint8_t protocol;
+    uint16_t hdr_chksum;
+    uint32_t src_ip_addr;
+    uint32_t dest_ip_addr;
+    uint8_t *options;
+    uint8_t *transport_header;
+};
+
+struct tcp_header
+{
+    uint16_t src_port_num;
+    uint16_t dest_port_num;
+    uint32_t seq_num;
+    uint32_t ack_num;
+    uint8_t hdr_len;
+    uint8_t flags;
+    uint16_t rcv_window;
+    uint16_t chksum;
+    uint16_t urgent;
+    uint8_t *options;
+    uint8_t *data;
+};
+
+struct udp_header
+{
+    uint16_t src_port_num;
+    uint16_t dest_port_num;
+    uint16_t len;
+    uint16_t chksum;
+    uint8_t *data;
+};
+
 /*
  * Reference counted class containing ethernet packet data
  */
@@ -61,6 +118,16 @@ class EtherPacket : public RefCounted
     bool IsMulticast() { return data[0] == 0x01; }
     bool IsBroadcast() { return data[0] == 0xff; }
 
+    ip_header *getIpHdr() { return (ip_header *) (data + 14); }
+
+    void *getTransportHdr() {
+        ip_header *ip = getIpHdr();
+        return (void *) (ip + (ip->vers_len & 0xf));
+    }
+
+
+    typedef RefCountingPtr<EtherPacket> PacketPtr;
+
     void serialize(std::ostream &os);
     void unserialize(Checkpoint *cp, const std::string &section);
 };