Sorry, I figured it out. Turned out to be
my receive buffer size was too small for the PPP link for some reason.
I increased it from IP_MSS (576) to 60*1024 which is what Stevens does.
Seemed to work, but if anyone has a suggestion on how large it should
really be for a null-modem link, please let me know.
Thanks again.
Tuan
On Tue, 29 Jun 1999, Tuan Hoang wrote:
> Does anyone know where the source for ping can be downloaded?
>
> I'm trying to implement my own ping inside my simulation process
> but I'm running into some problems. I have two boxes connected via
> PPP through a null-modem cable. My PC is a RH 6.0 (2.2.5-15) and
> the the other is Solaris 2.6 x86. I need to wait for the PPP to
> establish the IP addresses before I start. So my proposed solution
> is to ping the Solaris machine. My problem is that with my test program
> to generate/receive ICMP echo/replies works on a LAN but when I try
> to use it over the PPP, I don't get the replies. With tcpdump, I can
> see the replies on the PPP but my raw socket doesn't get it.
>
> few things to note:
> I have the IP_HDRINCL option set on the raw socket. (should only affect
> sending right?)
> I have the SO_RCVBUF set to IP_MSS or 576.
> I have the slhc, ppp, bsd_comp, and ppp_deflate modules loaded.
>
> Am I missing something crucial for PPP links?
> Does anyone know where the source for ping can be downloaded?
> Also would any of the previous modules cause the IP_TOS field to
> not show up on tcpdump over the PPP?
>
>
> Thanks,
> Tuan
>
> --
> Tuan Hoang
> Senior Software Systems Engineer
> The MITRE Corporation
> Email: [EMAIL PROTECTED]
> Voice: (732)389-6791
> Fax: (732)544-8863
>
>
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