Re: ICMP socket with Gambas

[Lee <t.lee.davidson@xxxxxxxxx>]

On 6/26/25 4:50 PM, Benoît Minisini wrote:
> No you are right. And IPV6 too is not really supported.
>
> It's not a domain I know well. So I don't know at the moment if it's just a matter of adding an option to the 'Socket' class to 
> let it open the socket in raw mode, or if a new class must be created because the behaviour of a raw socket is too much different.

I don't know this particular domain well either, but I've been looking into it.

I found a couple of examples of how it can be done in Python, and it looks to be simply using a raw socket.

https://denizhalil.com/2024/04/06/sending-icmp-packets-with-python-socket-adventure-in-signaling/ :
~~~~~~
with socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_ICMP) as sock:
            # Set socket TTL
            sock.setsockopt(socket.IPPROTO_IP, socket.IP_TTL, struct.pack("I", self.ttl))
~~~~~~

https://inc0x0.com/icmp-ip-packets-ping-manually-create-and-send-icmp-ip-packets/ :
~~~~~~
s = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_TCP)
s.setsockopt(socket.IPPROTO_IP, socket.IP_HDRINCL, 1)
~~~~~~
Why this one uses the IPPROTO_TCP protocol I have no clue.


I see that the example Olivier posted uses 'sendto'.

For reference:
https://www.man7.org/linux//man-pages/man2/send.2.html
https://www.man7.org/linux//man-pages/man2/socket.2.html


--
Lee

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