Internet on FIRE

Fixes to the progdoc.

#define SIZE_OF_IP_HEADER

Documented memory resources.

Added the introduction chapter of progdoc.

Added ipa_absolutize() which converts link-scope addresses to global scope
ones according to prefix assigned to the corresponding interface.

Oops, the poison was too deadly...

Unified parsing of prefixes.

Had to rename `prefix' in filters to `fprefix'.

Added skeleton Doc files for the whole developer's documentation.

Removed a lot of unused variables.

Please try compiling your code with --enable-warnings to see them. (The
unused parameter warnings are usually bogus, the unused variable ones
are very useful, but gcc is unable to control them separately.)

IPv6 address classification fixes.

Introduced `ARRAY_SIZE' macro to replace all the sizeof(a)/sizeof(*a) constructs.

Use bsprintf() instead of sprintf().

Defined sk_close() which closes the socket safely even if called from
socket hook. Replaces the SK_DELETED hack.

Squashed a couple of bugs in handling of TCP sockets.

Wrote real version of unaligned data access functions (needed for BGP).

DBG calls debug() if defined(LOCAL_DEBUG) || defined(GLOBAL_DEBUG).

Changed comments regarding hash function.

No more problems when events get scheduled during event processing.

Logging is now configurable. You can define multiple log outputs (to both
files and syslog) and assign lists of message categories to each of them.

ev_run() now returns whether the event has been requeued or not.
ev_run_list() now returns number of events which remain in the list.

Events now return a value. If it's non-zero, the event is re-queued
for processing in next event cycle. This can be used to prevent background
actions (hint: user commands) from hogging the CPU for too long time.

Changed syntax of ip_class_mask, the old one was stupid.

Added a function for generating 32-bit random numbers.

Basic support for IPv6. The system-dependent part doesn't work yet,
but the core routines are there and seem to be working.

o  lib/ipv6.[ch] written
   o  Lexical analyser recognizes IPv6 addresses and when in IPv6
      mode, treats pure IPv4 addresses as router IDs....

Faster checksum function.

Added sk_send_buffer_empty().

Added ip_skip_header() and modified OSPF to use it.

Recognize site scope for IPv4 addresses (prefixes reserved for private
networks).

Removed old #ifndef logic which was used to avoid IPv4/IPv6 clashes
before conditionals in Modules lists were introduced.

Fixed a couple of bugs in handling of multicast sockets.

See comments in lib/socket.h for a detailed guide on how to use them.

Clarify resource dumps and include them in the main debugging dump.

Moved all system-dependent #include's containing endianity conversion
functions to sysdep header endian.h.

Use dmalloc instead of EFence when available (dmalloc has lot of improvements
over EFence and also hopefully smaller memory overhead, but sadly it's non-free
for commercial use).

If the DMALLOC_OPTIONS environment variable is not set, switch on `reasonable'...

Real implementation of protocol state machines. Delayed startup/shutdown
should work now. Initial feeding of protocols by interfaces/routes is
done from the event queue to prevent unwanted recursion.

Added simple event scheduling system to avoid recursive calling
of various callbacks.

Events are just another resource type objects (thus automatically freed
and unlinked when the protocol using them shuts down). Each event can
be linked in at most one event list. For most purposes, just use the...

Replaced the old ugly ipv6 compilation hack by a conditional in Modules.

New hash functions according to benchmarks posted yesterday. (The IPv6
version has not been benchmarked yet due to insufficient test data.)
Now ipa_hash() returns a uniformely distributed 16-bit value.

Name cleanups as suggested by Pavel:

- cfg_strcpy() > cfg_strdup()
mempool -> linpool, mp_* -> lp_* [to avoid confusion with memblock, mb_*]

Anyway, it might be better to stop ranting about names and do some real work.

Renamed `DEBUG' symbol to `DEBUGGING' to prevent collisions with token
names and include files.

Removed prototype of rp_free() since this function has never existed.

Implemented snprintf and similar functions. It took a lot of thinking,
but the modifications were relatively simple and straightforward.

WALK_LIST_DELSAFE now actually works (it really couldn't since it didn't
reference list head at all).

Reversed buggy patch.

Added ipa_class_mask() which guesses netmask for classful addressing.
For pure A/B/C class addresses it just returns the class netmask, for
subnets it tries to guess subnet mask. Please make sure the address
you pass to this function is really a valid host address (i.e., call...

Adding walk list which permits you to delete entries.

Added local version of sprintf (bsprintf and bvsprintf) offering few new
format strings:

%I    IP address
    %#I    IP address in hexadecimal
    %1I    IP address padded to full length
    %m    strerror(errno)

Added function for converting of IP addresses to printable form.

Added generic functions for unaligned data access.

Added ipa_opposite().

Added few socket declarations.

Added declarations of all our socket functions.

BIRD library: The story continues.

Complete resource manages and IP address handling.