使用PHP发送IGMP

Question

Can I send out IGMP packets with a PHP script? Is IGMP even on the Transport Layer?

I was looking at some JOIN packets that are destined for 224.0.0.251.

I noticed that the IP header had no port assigned but did have MAC addresses specified, which led me to believe that IGMP was not on the Transport Layer but rather on the Network Layer. (hopefully I said that right)

Can someone clarify this for me? I'm just trying to send out a JOIN packet.

I was reading through rfc3376 to try and find the answer, but it just shows how to construct one. On trying to do so, I just get a malformed packet.

Answer 1

Probably not with existing PHP means. Existing extensions allow you access to TCP/UDP layer but not below. You probably could use some command-line tool like nemesis-igmp from Nemesis project to do it.