add RIP request on interface UP along with better error messages for interfaces being down & up

3 files changed, 13 insertions, 2 deletions

diff --git a/pkg/ipstack/ipstack.go b/pkg/ipstack/ipstack.go
index 2ab2a5f..f6c86a8 100644
--- a/pkg/ipstack/ipstack.go
+++ b/pkg/ipstack/ipstack.go
@@ -226,7 +226,18 @@ func InterfaceUp(iface *Interface) {
 		ripEntries := make([]RIPEntry, 0)
 		ripEntries = append(ripEntries, RIPEntry{iface.IpPrefix.Masked(), LOCAL_COST})
 		sendTriggeredUpdates(ripEntries)
+
+		// send a request to all neighbors of this iface to get info ASAP
+		for _, neighbor := range myNeighbors[iface.Name] {
+			message := makeRipMessage(1, nil)
+			addr := iface.IpPrefix.Addr()
+			_, err := SendIP(&addr, neighbor, RIP_PROTOCOL, message, neighbor.VipAddr.String(), nil)
+			if err != nil {
+				fmt.Println("Error sending RIP request to neighbor on interfaceup", err)
+			}
+		}
 	}
+
 }
 
 func InterfaceUpREPL(ifaceName string) {
@@ -379,7 +390,7 @@ func CleanUp() {
 func SendIP(src *netip.Addr, dest *Neighbor, protocolNum int, message []byte, destIP string, hdr *ipv4header.IPv4Header) (int, error) {
 	iface, err := GetInterfaceByName(dest.Name)
 	if !iface.State {
-		return -1, errors.New("error: interface is down")
+		return -1, errors.Errorf("error SEND: %s is down", iface.Name)
 	}
 
 	if hdr == nil {
@@ -466,7 +477,7 @@ func RecvIP(iface *Interface, isOpen *bool) error {
 	}
 
 	if !*isOpen {
-		return errors.New("interface is down")
+		return errors.Errorf("error RECV: %s is down", iface.Name)
 	}
 
 	// Marshal the received byte array into a UDP header
diff --git a/vhost b/vhost
index 7ca732c..82e8ed0 100755
--- a/vhost
+++ b/vhost
diff --git a/vrouter b/vrouter
index 7b61c7e..6a34548 100755
--- a/vrouter
+++ b/vrouter