On Aug 6, 2007, at 6:30 PM, James Carlson wrote:
Kevin K writes:
Is it possible to send raw packets via ppp under Linux?
More specifically, in 2.4 series kernels such as RH's 2.4.21-47
kernel?
I've trying to modify the DHCP 3.0.1 code provided with RH 3 so I can
send requests via a PPP connection (standard RS-232), and it is just
being dropped by the stack according to ifconfig and debug statements
in ppp_generic.c.
I'm not sure what sort of "raw" packets you're talking about (IP raw
or something else), but you shouldn't need to send any raw packets to
do this. DHCP runs over UDP, and, unlike Ethernet, there's no link
layer addressing to worry about.
--
James Carlson 42.703N 71.076W
<carlsonj@xxxxxxxxxxxxxxx>
I would like to thank the people who responded to this posting for
their help. It helped keep me from wasting additional time trying to
use SOCK_PACKET over PPP just because the DHCP code in Red Hat used
it for ethernet. (The dhclient code did it to ensure that the
ethernet/IP/UDP headers were to their satisfaction, and to avoid some
bugs in older versions of the Linux kernel).
I've tested through a serial/PPP connection without issues.
This is obviously not a normal configuration, having to run a DHCP
client through PPP, but the IP addresses are assigned via a DHCP
server, but he router we connect to via PPP won't retrieve addresses
from the DHCP server for us.
Thanks,
Kevin
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