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Date: Mon, 8 Apr 1996 08:52:43 -0600
From: Nate Williams <nate@sri.MT.net>
Message-Id: <199604081452.IAA24889@rocky.sri.MT.net>
To: Michael Smith <msmith@atrad.adelaide.edu.au>
Cc: ache@astral.msk.su (=?KOI8-R?Q?=E1=CE=C4=D2=C5=CA_=FE=C5=D2=CE=CF=D7?=),
        current@freebsd.org
Subject: Re: routed delete my PPP default: how to fight it?
In-Reply-To: <199604080645.QAA08973@genesis.atrad.adelaide.edu.au>
References: <199604080330.HAA00431@astral.msk.su>
	<199604080645.QAA08973@genesis.atrad.adelaide.edu.au>
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> > It was what I do. It seems that PPP send routed brodcasts.
> 
> Well, having checked the sources, I have to say that unless it cons' code
> up out of nowhere when it runs, there doesn't appear to be _any_ UDP 
> code, routed-aware or not in iijppp.

Umm, I know there is some IP code being sent out in iijppp, but it's not
necessary.  It might be interpreted as 'UDP' code.

    if ((routes = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
        logprintf("sifproxyarp: opening routing socket: \n");
        return 0;
    }

    arpmsg.hdr.rtm_type = RTM_ADD;
    arpmsg.hdr.rtm_flags = RTF_ANNOUNCE | RTF_HOST | RTF_STATIC;
    arpmsg.hdr.rtm_version = RTM_VERSION;
    arpmsg.hdr.rtm_seq = ++rtm_seq;
    arpmsg.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY;
    arpmsg.hdr.rtm_inits = RTV_EXPIRE;
    arpmsg.dst.sin_len = sizeof(struct sockaddr_inarp);
    arpmsg.dst.sin_family = AF_INET;
    arpmsg.dst.sin_addr.s_addr = hisaddr;
    arpmsg.dst.sin_other = SIN_PROXY;

    arpmsg.hdr.rtm_msglen = (char *) &arpmsg.hwa - (char *) &arpmsg
        + arpmsg.hwa.sdl_len;
    if (write(routes, &arpmsg, arpmsg.hdr.rtm_msglen) < 0) {
...

Look in arp.c



Nate