Skip to content

Every time get error WinDivertException{code=3, message='null'} #7

@nimminimminot

Description

@nimminimminot

Hello! Every time packet match program throws exception. For example, filter all icmp:
`public static void main(String[] args) {
WinDivert w = new WinDivert("icmp");

	try {
		w.open(); // packets will be captured from now on
		
		int i = 0;
		while (i<10) {
			Packet packet = w.recv();  // read a single packet
			System.out.println(packet);
			w.send(packet);  // re-inject the packet into the network stack
			i++;
		}
		w.close();  // stop capturing packets
	} catch (WinDivertException e) {
		e.printStackTrace();
	}
}`

First packet printed:
Packet {IPv4 {version=4, srcAddr=127.0.0.1, dstAddr=127.0.0.1, IHL=5, DSCP=0, ECN=0, length=60, ID=b7d3 RESERVED=false, DF=false, MF=false, fragOff=0 TTL=128 proto=ICMP, cksum=84eb}, ICMPv4 {type=8, code=0, cksum=4d4a, restOfHdr=00010011}, direction=OUTBOUND, iface=[0, 0], raw=4500003CB7D30000800184EB7F0000017F00000108004D4A000100116162636465666768696A6B6C6D6E6F7071727374757677616263646566676869}

And on w.send(packet) get an exception:

WinDivertException{code=3, message='null'}
        at com.github.ffalcinelli.jdivert.exceptions.WinDivertException.throwExceptionOnGetLastError(WinDivertException.java:57)
        at com.github.ffalcinelli.jdivert.Packet.recalculateChecksum(Packet.java:359)
        at com.github.ffalcinelli.jdivert.WinDivert.send(WinDivert.java:271)
        at com.github.ffalcinelli.jdivert.WinDivert.send(WinDivert.java:234)

Always.
Run as admin.

Why I receive error on recalculateChecksum every time?

Metadata

Metadata

Assignees

No one assigned

    Labels

    No labels
    No labels

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions