update copyright info

update license to GPLv2 and GPLv3

Separate debug defines for every module

Issue #387: Added some more checking/freeing stuff/todos

Issue #387: Check return value of pico_timer_add() and pico_timer_add_hashed()

Coverity ID 65619: NAT: add missing break statement in switch

Make local variables static

detected using -Wmissing-variable-declarations clang option

Updated Copyright information.

Enforced coding style via uncrustify

Refactored IP address comparison into one centralized function

Fixed regression in nat.c

Reduced cyclomatic complexity of modules/pico_nat.c

Removed more gcc warnings on vinz machine

Changes for IAR/EWARM

Solved TCP dependancy problem in nat/ipv4 (Fix #116)

* changed pico_free into PICO_FREE
* changed pico_zalloc into PICO_ZALLOC

Added uncrustify. Enforced some coding rules. Added "make style" target.

Promoted pico_tick to uint64, created pico_time to diff the time variables

Issue #17. Fixed warnings (part three)

Issue #17. Fixed warnings (part one)

Issue #17. Fixed all -Wunused-parameter, except dhcp,

Task #782 return error when failing to generate nat port

Task #791 Refactored NAT implementation

TODO: implement ICMP support

Task #549 Fixed usage of net_len variable + added router alert option to IGMP

Fixed Bind, broadcast, multiple sockets (should close #647, #648)

Task #577 Rewrite/rename of UDP CRC function pico_udp_checksum_ipv4

Task #514 - fixed declarations warnings in module files

[ICMP4] Added TTL field in ping statistics

[topology] -- not adding backward routes for nat boxes

Task #442 Integrated the new rb library + unit tests for it + a few bugfixes

Fixed warnings, reduced verbosity

NAT: consolidated little-endian and big-endian usage

Reworked static objects in the modules, to allow unit tests to include .c files

Changed LICENSE to GPL2. Removed the do-not-distribute clause from the source headers

Task #387 - Finished review ipv4, dhcp, igmp documentation

NAT memory leak fix on RB_INSERT

Task #101 NAT - conversion to pico_ip4 addresses

Task #101 - Added NAT functionality to send ICMP from priv side

Added the functionality to send ICMP packets from a private adress
(before nat_box). The reply is also received back. Tested with
picoapp ping and natbox.

TODO: make nat_port entry more unique somehow
TODO: check if additional checks are necessary for usage of ICMP
with NAT.

Task #318 Implement NAT port forwarding

Task #292 NAT implement port check.

A port used by an application can not be used by NAT and the other way around.

FIX NAT port generation bug

Only ports between 0 and 4095 were being generated. This caused an
infinite loop after the creation of a certain amount of ports.

Task #293 FIX NAT RB tree bug. Split the current tree in a forward tree and backward tree.

Cleanup of NAT debug

Improved makefiles, to use conditionals. Selectable modules. Closes #210, #187.

Nat debug disabled.

Fixed NAT table cleanup loop using RB_FOREACH_REVERSE_SAFE.

Removed some warnings + trailing spaces.

Little bug fixed for sniffers on issue #205

Fix on layout padding of print NAT table

Implemented deletion of entries from NAT table

pico_ipv4_nat_disable() functionality added #208

Implemented 4min timer for NAT table cleanup

Forward&backward sniffing for RB-tree delete #205

Rewrote print table of NAT

Initializing del_flags when adding NAT entries

- Reduced verbosity, fixed autotest.sh

new pico_nat_key struct element: del_flags, for managing deleting pico_nat_key's #205

Search on src addr from nat tree, bugfix #89

applied changes to RB_TREE-function calls

Clean up the nat code #89

Rewrite of pico_ipv4_nat_find version 2

bug fixes in forward function of NAT #155

Reduced logs for NAT

bugfixes nat #202

Forward function is not working properly yet
Not tested completely !

Implementation of NAT in the testfile test/nat_box.c

Moved the definition of struct pico_ipv4_link to the header file
as we need a link to enable the NAT on.

Task #89 - integrated major NAT tasks

Integrated NAT tasks 153, 154 and 196.
Preliminary enable check functions implemented to test.
All functions compile without warnings and errors.
Next step is to implement NAT calls in the stack.

Task #153 Create NAT table with active conversations.

Creation of RB tree for NAT entries. Implemented add, delete and
find functions.