01-10-2002
Sounds like a very interesting problem.... however I did not fully understand what you are trying to do. Using RAW sockets requires a lot of work to set up the correct client-server socket parameters and data structures. If you are using IP, you need to look at the fields in the IP header and make sure you are building IP packets that can be properly processed on both ends.
What am I missing?
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ATALK(4) Netatalk 2.2 ATALK(4)
NAME
atalk - AppleTalk protocol family
SYNOPSIS
#include <sys/types.h>
#include <netatalk/at.h>
DESCRIPTION
The AppleTalk protocol family is a collection of protocols layered above the Datagram Delivery Protocol (DDP), and using AppleTalk address
format. The AppleTalk family may provide SOCK_STREAM (ADSP), SOCK_DGRAM (DDP), SOCK_RDM (ATP), and SOCK_SEQPACKET (ASP). Currently, only
DDP is implemented in the kernel; ATP and ASP are implemented in user level libraries; and ADSP is planned.
ADDRESSING
AppleTalk addresses are three byte quantities, stored in network byte order. The include file <netatalk/at.h> defines the AppleTalk address
format.
Sockets in the AppleTalk protocol family use the following address structure:
struct sockaddr_at {
short sat_family;
u_char sat_port;
struct at_addr sat_addr;
char sat_zero[ 8 ];
};
The port of a socket may be set with bind(2). The node for bind must always be ATADDR_ANYNODE: ``this node.'' The net may be ATADDR_ANYNET
or ATADDR_LATENET. ATADDR_ANYNET coresponds to the machine's ``primary'' address (the first configured). ATADDR_LATENET causes the
address in outgoing packets to be determined when a packet is sent, i.e. determined late. ATADDR_LATENET is equivalent to opening one
socket for each network interface. The port of a socket and either the primary address or ATADDR_LATENET are returned with getsockname(2).
SEE ALSO
bind(2), getsockname(2), atalkd(8).
Netatalk 2.2 17 Dec 1991 ATALK(4)