I could really use some help. I'm working on a program that needs
to create an ARP packet from user-space. Would anyone mind to point me in
the right direction? I have been looking through the kernel code but I'm a
bit lost. I'm trying to do this (pseudo code):
sockfd = socket( AF_INET, SOCK_RAW, IPPROTO_RAW );
setsockopt( sockfd, SOL_SOCKET, SO_DONTROUTE, blah, blah );
/* Builds frame with ARP flag, etc */
build_packet( including ethernet header );
send( sockfd, packet, 42, 0 );
The call the send() returns -EINVAL. I've tried using IPPROTO_IP and
IP_HDRINCL instead for the setsockopt(), but it made no difference.
Clearly I'm doing something (majorly) wrong. Can anyone help me out?
thanks,
-bp
-- B. James Phillippe . bryan@terran.org UNIX Software Engineer . http://www.terran.org/~bryan Member since 1.1.59 . finger:bryan@earth.terran.org MOTM: Waiting for the DSL to go in :)
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