From: Claudio Jeker <cjeker@diehard.n-r-g.com>
Subject: Re: ppp(4) : Add IPv6 support
To: Denis Fondras <openbsd@ledeuns.net>
Cc: tech@openbsd.org
Date: Tue, 27 Feb 2024 11:17:54 +0100

On Mon, Feb 26, 2024 at 08:49:34PM +0100, Denis Fondras wrote:
> Here is a diff to add IPv6 support to ppp(4).
> With this diff, I can send and receive IPv6 packets over a PPP connection.
> 
> Anyone confortable to get this in ?

Looks good to me. OK claudio@
How does this interact with the various compression methods? Did you look
into that?
 
> +#ifdef INET6
> +	case PPP_IPV6:
> +		/*
> +		 * IPv6 packet - take off the ppp header and pass it up to IPv6.
> +		 */
> +		if ((ifp->if_flags & IFF_UP) == 0 ||
> +		    sc->sc_npmode[NP_IPV6] != NPMODE_PASS) {
> +			/* interface is down - drop the packet. */
> +			m_freem(m);
> +			return;
> +		}
> +		m->m_pkthdr.len -= PPP_HDRLEN;
> +		m->m_data += PPP_HDRLEN;
> +		m->m_len -= PPP_HDRLEN;

I know this is a copy of the PPP_IP case but isn't that above normally
spelled 'm_adj(m, PPP_HDRLEN);' ?
  
> +		ipv6_input(ifp, m);
> +		rv = 1;
> +		break;
> +#endif

-- 
:wq Claudio