1 files changed, 66 insertions, 0 deletions
diff --git a/cmd/pkg/protocol.go b/cmd/pkg/protocol.go
new file mode 100644
index 0000000..84444c3
--- /dev/null
+++ b/cmd/pkg/protocol.go
@@ -0,0 +1,66 @@
+package pkg
+
+import (
+	"net"
+	// "netip"
+)
+
+const (
+	MAX_IP_PACKET_SIZE = 1400
+)
+
+func Initialize(config IpConfig) (error) {
+	// ip config from go parser
+
+	// initialize ip table
+
+	// error check
+
+	// different for router and host??
+	// host 
+	// create node interfaces?
+}
+
+func ipRecv(data []byte) (error) {
+	// parse ip header
+
+	// check ip checksum
+
+	// check ip version
+
+	// check ip length
+
+	// check ip ttl
+
+	// check ip protocol
+
+	// check ip destination
+
+	// check ip source
+
+	// check forwarding table
+}
+
+func ipForwarding(dst netip.Addr, protocolNum uint16, data []byte) (error) {
+	// send test packest to dst
+
+	// lookup forwarding table
+
+	// locally
+
+	// not locally
+}
+
+type HandlerFunc = func(*Packet, []interface{}) (error) {
+
+	// do smth with packet
+}
+
+func RegisterRecvHandler(protocolNum uint8, callbackFunc HandlerFunc) (error) {
+}
+
+func routeRip() (error) {
+	// communicate with other routers
+
+	// update forwarding table
+}