lzr does not work

[marek22k]

lzr \
    -sendSYNs \
    -sourceIP 172.22.149.250 \
    -handshakes dns,http,tls,ssh \
    -rn 4 \
    -rt 4 \
    -rate 20 \
    -sendInterface portscanning \
    < list.lst

list.lst:

172.22.149.224:80
172.22.149.224:443
172.22.149.224:53
172.22.149.224:22

lzr output:

++Writing results to file: default_20251107234332.json
++Handshakes: dns,http,tls,ssh
++Sending SYNs at a rate of:  20
++Using SourceIP: 172.22.149.250
++Using Sending Interface: portscanning
++Worker threads: 1
++Timeout Interval (s): 5
++Cooldown after completing (s): 8
++Retransmit Interval (s): 4
++Number of Retransmitions: 4
panic: Gateway Mac Address required

goroutine 7 [running]:
github.com/stanford-esrg/lzr.convertFromInputListToPacket({0xc0000d01c8, 0x11})
	/home/marek/lzr/packet.go:163 +0x39e
github.com/stanford-esrg/lzr.ConstructIncomingRoutine.func1()
	/home/marek/lzr/construct_main_routines.go:105 +0x30c
created by github.com/stanford-esrg/lzr.ConstructIncomingRoutine in goroutine 1
	/home/marek/lzr/construct_main_routines.go:59 +0x66

Connection works:

marek@meyrin-serv:~$ curl --head -v 172.22.149.224
*   Trying 172.22.149.224:80...
* Connected to 172.22.149.224 (172.22.149.224) port 80
* using HTTP/1.x
> HEAD / HTTP/1.1
> Host: 172.22.149.224
> User-Agent: curl/8.14.1
> Accept: */*
> 
* Request completely sent off
< HTTP/1.1 200 OK
HTTP/1.1 200 OK
< Server: nginx
Server: nginx
< Date: Fri, 07 Nov 2025 22:39:40 GMT
Date: Fri, 07 Nov 2025 22:39:40 GMT
< Content-Type: text/html; charset=UTF-8
Content-Type: text/html; charset=UTF-8
< Connection: keep-alive
Connection: keep-alive
< Content-Language: en
Content-Language: en
< X-Content-Type-Options: nosniff
X-Content-Type-Options: nosniff
< X-Frame-Options: DENY
X-Frame-Options: DENY
< Referrer-Policy: no-referrer
Referrer-Policy: no-referrer
< X-XSS-Protection: 1; mode=block
X-XSS-Protection: 1; mode=block
< Content-Security-Policy: default-src 'none'; base-uri 'none'; form-action 'none'; frame-ancestors 'none'; style-src  'unsafe-inline' 'self'; style-src-elem  'unsafe-inline' 'self'; img-src 'self'; script-src  'unsafe-inline' 'self';
Content-Security-Policy: default-src 'none'; base-uri 'none'; form-action 'none'; frame-ancestors 'none'; style-src  'unsafe-inline' 'self'; style-src-elem  'unsafe-inline' 'self'; img-src 'self'; script-src  'unsafe-inline' 'self';
< 

* Connection #0 to host 172.22.149.224 left intact

$ ip a s portscanning
4: portscanning: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1380 qdisc noqueue state UNKNOWN group default qlen 1000
    link/none 
    inet 172.22.149.250/32 scope global noprefixroute portscanning
       valid_lft forever preferred_lft forever
    inet6 fd04:234e:fc31::250/128 scope global noprefixroute 
       valid_lft forever preferred_lft forever
    inet6 fe80::ce24:354:71ce:20a0/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever

The interface is a WireGuard interface (therefore a Layer 3 interface) and therefore has no MAC address.

[GQW19]

Sorry for the late follow up to this comment. I was looking at your issue and it appears that LZR currently requires a Layer 2 interface for sending packets (since it sends packets on the Ethernet level). For example, you can look at packet construction here.

So for the moment it will still require a MAC address for your interface. While I'm not sure that adding Layer 3-only support is on the roadmap for LZR development currently, PRs are definitely always welcome if you'd like to contribute.