Re: [developer] Raw ethernet packets

[Marcel Telka <marcel@telka.sk>]

On Fri, May 31, 2024 at 03:18:23PM +0300, Denis Kozadaev wrote:
> On Friday 31 May 2024 15:07:13 Marcel Telka wrote:
> > On Fri, May 31, 2024 at 02:23:04PM +0300, Denis Kozadaev wrote:
> > > The send() function can be used only when the socket is in a connected
> > > state. (c) manual page at https://illumos.org/man/3SOCKET/send
> > > Use sendto(), Marcel.
> >
> >         sendto(s, buf, sizeof buf - 1, 0, NULL, 0);
> >
> > gives the same result: succeeds, but no packet on the network.
> it is because
> send(sock, buf, len, flags)
> could be equivalent to
> sendto(sock, buf, len, flags, NULL, 0)
> it depend of the implementation
> You should specify a real address for sendto()
> and yes, the packet and the address have duplicate of this data.

I tried to add this:


	llp.sll_pkttype = PACKET_BROADCAST;
	llp.sll_hatype = ARPHRD_ETHER;
	llp.sll_halen = 6;
	llp.sll_addr[0] = 0xff;
	llp.sll_addr[1] = 0xff;
	llp.sll_addr[2] = 0xff;
	llp.sll_addr[3] = 0xff;
	llp.sll_addr[4] = 0xff;
	llp.sll_addr[5] = 0xff;

	sendto(s, buf, sizeof buf - 1, 0, (struct sockaddr *)&llp, sizeof llp);

And the result is stil the same: the function succeeded, no packet on
the network.

-- 
+-------------------------------------------+
| Marcel Telka   e-mail:   marcel@telka.sk  |
|                homepage: http://telka.sk/ |
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