* Using can2udp to convert UDP to CAN

If started with the -r switch, can2udp will listen on the specified UDP
port for messages containing CAN packets. The messages are human 
readable strings consisting of the following:
(1) The magic string "PCAN", followed by optional newlines and spaces
(2) One or more of:
(2.1) A CAN message header as 1 to 4 hex digits, followed by space
(2.2) Zero to eight bytes, each as 1 to 2 hex digits, separated by spaces
(2.3) a newline

So, for example:
PCAN
310 01 00
210 

will send two CAN messages, the first with ID 0x310 and two payload bytes 0x01 0x00, the second with only the ID 0x210

* Building

** Dependencies

*** Library libpcan from peak-linux-driver-6.13

The source code assumes that pcan.h and libpcan.h are in 
the current directory. If they are not, symlink them using
ln -s or use the gcc -I switch

Make sure that the gcc -lpcan switch can find libpcan.so 

*** Library popt 1.14-4

Code uses only a small subset of popt features, and will 
probably work with older versions of the library.

Make sure popt.h and related files are in the include path
for gcc, and that libpopt.so is in the link path.

** Commandline

Compile the code with the following commandline

gcc -O4 -g can2udp.c -o can2udp -lpopt -lpcan 

** Files

  can2udp.c -- main source file
  sockit.h -- library of useful socket functions