Commit Graph

7 Commits

Author SHA1 Message Date
Willy Tarreau
a1bd1faeeb BUILD: use inttypes.h instead of stdint.h
I found on an (old) AIX 5.1 machine that stdint.h didn't exist while
inttypes.h which is expected to include it does exist and provides the
desired functionalities.

As explained here, stdint being just a subset of inttypes for use in
freestanding environments, it's probably always OK to switch to inttypes
instead:

  https://pubs.opengroup.org/onlinepubs/009696799/basedefs/stdint.h.html

Also it's even clearer here in the autoconf doc :

  https://www.gnu.org/software/autoconf/manual/autoconf-2.61/html_node/Header-Portability.html

  "The C99 standard says that inttypes.h includes stdint.h, so there's
   no need to include stdint.h separately in a standard environment.
   Some implementations have inttypes.h but not stdint.h (e.g., Solaris
   7), but we don't know of any implementation that has stdint.h but not
   inttypes.h"
2019-04-01 07:44:56 +02:00
Willy Tarreau
841bc7d471 CONTRIB: hpack: add a compressed stream generator for the encoder
This generates the tables and indexes which will be used by the HPACK
encoder. The headers are sorted by length, then by statistical frequency,
then by direction (preference for responses), then by name, then by index.
The purpose is to speed up their lookup.
2018-12-11 09:06:46 +01:00
Willy Tarreau
5cc8a0a7ac CLEANUP/CONTRIB: hpack: remove some h1 build warnings
These are inherited by recent reorganization to the H1 code.
2018-09-20 09:41:24 +02:00
Willy Tarreau
83061a820e MAJOR: chunks: replace struct chunk with struct buffer
Now all the code used to manipulate chunks uses a struct buffer instead.
The functions are still called "chunk*", and some of them will progressively
move to the generic buffer handling code as they are cleaned up.
2018-07-19 16:23:43 +02:00
Willy Tarreau
843b7cbe9d MEDIUM: chunks: make the chunk struct's fields match the buffer struct
Chunks are only a subset of a buffer (a non-wrapping version with no head
offset). Despite this we still carry a lot of duplicated code between
buffers and chunks. Replacing chunks with buffers would significantly
reduce the maintenance efforts. This first patch renames the chunk's
fields to match the name and types used by struct buffers, with the goal
of isolating the code changes from the declaration changes.

Most of the changes were made with spatch using this coccinelle script :

  @rule_d1@
  typedef chunk;
  struct chunk chunk;
  @@
  - chunk.str
  + chunk.area

  @rule_d2@
  typedef chunk;
  struct chunk chunk;
  @@
  - chunk.len
  + chunk.data

  @rule_i1@
  typedef chunk;
  struct chunk *chunk;
  @@
  - chunk->str
  + chunk->area

  @rule_i2@
  typedef chunk;
  struct chunk *chunk;
  @@
  - chunk->len
  + chunk->data

Some minor updates to 3 http functions had to be performed to take size_t
ints instead of ints in order to match the unsigned length here.
2018-07-19 16:23:43 +02:00
Willy Tarreau
4576424174 CONTRIB: hpack: add an hpack decoder
This decoder takes a series of hex codes on stdin using one line
per HEADERS frame and shows the decoded headers.
2017-12-30 17:43:28 +01:00
Willy Tarreau
8071eae6b9 CONTRIB: hpack: implement a reverse huffman table generator for hpack
This one was built by studying the HPACK Huffman table (RFC7541
appendix B). It creates 5 small tables (4*512 bytes, 1*64 bytes) to
map one byte at a time from the input stream based on the following
observations :

 * rht_bit31_24[256]   is indexed on bits 31..24 when < 0xfe
 * rht_bit24_17[256]   is indexed on bits 24..17 when 31..24 >= 0xfe
 * rht_bit15_11_fe[32] is indexed on bits 15..11 when 24..17 == 0xfe
 * rht_bit15_8[256]    is indexed on bits 15..8 when 24..17 == 0xff
 * rht_bit11_4[256]    is indexed on bits 11..4 when 15..8 == 0xff
 * when 11..4 == 0xff, 3..2 provide the following mapping :
 *   00 => 0x0a, 01 => 0x0d, 10 => 0x16, 11 => EOS
2017-10-31 18:03:24 +01:00