From 7bb2015a1f2de7a31c3f2b3092a574602a2a3d53 Mon Sep 17 00:00:00 2001
From: David Doan <daviddoan@Davids-MacBook-Pro-70.local>
Date: Mon, 2 Oct 2023 19:22:21 -0400
Subject: initializations

---
 Makefile            |  6 +++++
 cmd/pkg/protocol.go | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 cmd/vhost/main.go   | 17 ++++++++++++++
 cmd/vrouter/main.go | 17 ++++++++++++++
 go.mod              |  3 +++
 5 files changed, 109 insertions(+)
 create mode 100644 Makefile
 create mode 100644 cmd/pkg/protocol.go
 create mode 100644 cmd/vhost/main.go
 create mode 100644 cmd/vrouter/main.go
 create mode 100644 go.mod

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..f59715f
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,6 @@
+all:
+	go build -ldflags="-X 'main.Version=1.0.0'" -buildvcs=false ./cmd/vhost
+	go build -ldflags="-X 'main.Version=1.0.0'" -buildvcs=false ./cmd/vrouter
+
+clean:
+	rm -fv snowcast_control snowcast_server
\ No newline at end of file
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
+}
diff --git a/cmd/vhost/main.go b/cmd/vhost/main.go
new file mode 100644
index 0000000..82b8195
--- /dev/null
+++ b/cmd/vhost/main.go
@@ -0,0 +1,17 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+)
+
+func main() {
+
+	scanner := bufio.NewScanner(os.Stdin)
+
+	for scanner.Scan() {
+		line := scanner.Text()
+		fmt.Println(line)
+	}
+}
\ No newline at end of file
diff --git a/cmd/vrouter/main.go b/cmd/vrouter/main.go
new file mode 100644
index 0000000..82b8195
--- /dev/null
+++ b/cmd/vrouter/main.go
@@ -0,0 +1,17 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+)
+
+func main() {
+
+	scanner := bufio.NewScanner(os.Stdin)
+
+	for scanner.Scan() {
+		line := scanner.Text()
+		fmt.Println(line)
+	}
+}
\ No newline at end of file
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..032a459
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module golang-sockets
+
+go 1.18
\ No newline at end of file
-- 
cgit v1.2.3-70-g09d2