TODO

-modify crapy printing functions
-add help and filter list to protofilters
-use automake and autoconf
-use little or bigendian types in protocols structs
-use atexit or on_exit, abort function
-use standard loop for string seeking in arrays
-protocol option "proto1 OR proto2" (atm just "proto1 AND proto2")
-use the new system for the timelimit and packet number options
-make the "time since first packet" report option work
-new protocols (to be done)
-make the defaults for the report system
-update the manual
-display expression option
-put the filtering, parsing and checking functions in the protocols/ files

-remove the mistakes in the manual
-interactive mode
-use standard libs
-use standard status as END_STATUS_OK
-revision prints.c and other print files
-revision of the user's options names
-make structures/functions for dynamic structures
-enable filtering of encapsuled protocol headers (like IP header in ICMP) 
-options to display detailed layer protocol description
-use sprintf instead of fprintf in prints.c
-complete verification of the arguments in the check_options
-give the choice of the interface
-make a session layer filter
-stack for the received packet, keep the time
-time received options 
-ntohs / ntohl
-make the filter work for fragmented data (tcp,ip) 
-make the code fit on a 80x24 console

-code optimization
-comment
-make the net libs