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libwebsockets/changelog
Andy Green 895d56d4ce remove minimum frame size for deflate 
The idea here seems wrong, if we have a mixture of frames of varying
sizes above and below the limit, we segfault in deflate after skipping
it once.

If the protocol doesn't want compression because many frames are
small, it should veto the extension in the user callback.  If only
a few frames are tiny, the overhead for compressing it all is tiny.

Signed-off-by: Andy Green <andy.green@linaro.org>
2013-02-11 10:18:31 +08:00

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Changelog
---------
(development since 1.1....)
User api additions
------------------
- lws_get_library_version() returns a const char * with a string like
"1.1 9e7f737", representing the library version from configure.ac
and the git HEAD hash the library was built from
- TCP Keepalive can now optionally be applied to all lws sockets, on Linux
also with controllable timeout, number of probes and probe interval.
(On BSD type OS, you can only use system default settings for the
timing and retries, although enabling it is supported by setting
ka_time to nonzero, the exact value has no meaning.)
This enables detection of idle connections which are logically okay,
but are in fact dead, due to network connectivity issues at the server,
client, or any intermediary. By default it's not enabled, but you
can enable it by setting a non-zero timeout (in seconds) at the new
ka_time member at context creation time.
User api changes
----------------
- libwebsocket_create_context() has changed from taking a ton of parameters
to just taking a pointer to a struct containing the parameters. The
struct lws_context_creation_info is in libwebsockets.h, the members
are in the same order as when they were parameters to the call
previously. The test apps are all updated accordingly so you can
see example code there.
- Header tokens are now deleted after the websocket connection is
established. Not just the header data is saved, but the pointer and
length array is also removed from (union) scope saving several hundred
bytes per connection once it is established
- struct libwebsocket_protocols has a new member rx_buffer_size, this
controls rx buffer size per connection of that protocol now. Sources
for apps built against older versions of the library won't declare
this in their protocols, defaulting it to 0. Zero buffer is legal,
it causes a default buffer to be allocated (currently 4096)
If you want to receive only atomic frames in your user callback, you
should set this to greater than your largest frame size. If a frame
comes that exceeds that, no error occurs but the callback happens as
soon as the buffer limit is reached, and again if it is reached again
or the frame completes. You can detect that has happened by seeing
there is still frame content pending using
libwebsockets_remaining_packet_payload()
By correctly setting this, you can save a lot of memory when your
protocol has small frames (see the test server and client sources).
User api removals
-----------------
The configuration-time option MAX_USER_RX_BUFFER has been replaced by a
buffer size chosen per-protocol. For compatibility, there's a default of
4096 rx buffer, but user code should set the appropriate size for the
protocol frames.
New features
------------
- Cmake project file added, aimed initially at Windows support: this replaces
the visual studio project files that were in the tree until now.
- PATH_MAX or MAX_PATH no longer needed
- cutomizable frame rx buffer size by protocol
- By default debug is enabled and the library is built for -O0 -g to faclitate
that. Use --disable-debug configure option to build instead with -O4
and no -g (debug info), obviously providing best performance and
reduced binary size.
- 1.0 introduced some code to try to not deflate small frames, however this
seems to break when confronted with a mixture of frames above and
below the threshold, so it's removed. Veto the compression extension
in your user callback if you will typically have very small frames.
v1.1-chrome26-firefox18
=======================
Diffstat
--------
Makefile.am | 4 +
README-test-server | 291 ---
README.build | 239 ++
README.coding | 138 ++
README.rst | 72 -
README.test-apps | 272 +++
configure.ac | 116 +-
lib/Makefile.am | 55 +-
lib/base64-decode.c | 5 +-
lib/client-handshake.c | 121 +-
lib/client-parser.c | 394 ++++
lib/client.c | 807 +++++++
lib/daemonize.c | 212 ++
lib/extension-deflate-frame.c | 132 +-
lib/extension-deflate-stream.c | 12 +-
lib/extension-x-google-mux.c | 1223 ----------
lib/extension-x-google-mux.h | 96 -
lib/extension.c | 8 -
lib/getifaddrs.c | 271 +++
lib/getifaddrs.h | 76 +
lib/handshake.c | 582 +----
lib/libwebsockets.c | 2493 ++++++---------------
lib/libwebsockets.h | 115 +-
lib/md5.c | 217 --
lib/minilex.c | 440 ++++
lib/output.c | 628 ++++++
lib/parsers.c | 2016 +++++------------
lib/private-libwebsockets.h | 284 +--
lib/server-handshake.c | 275 +++
lib/server.c | 377 ++++
libwebsockets-api-doc.html | 300 +--
m4/ignore-me | 2 +
test-server/Makefile.am | 111 +-
test-server/libwebsockets.org-logo.png | Bin 0 -> 7029 bytes
test-server/test-client.c | 45 +-
test-server/test-echo.c | 330 +++
test-server/test-fraggle.c | 20 +-
test-server/test-ping.c | 22 +-
test-server/test-server-extpoll.c | 554 -----
test-server/test-server.c | 349 ++-
test-server/test.html | 3 +-
win32port/zlib/ZLib.vcxproj | 749 ++++---
win32port/zlib/ZLib.vcxproj.filters | 188 +-
win32port/zlib/adler32.c | 348 ++-
win32port/zlib/compress.c | 160 +-
win32port/zlib/crc32.c | 867 ++++----
win32port/zlib/crc32.h | 882 ++++----
win32port/zlib/deflate.c | 3799 +++++++++++++++-----------------
win32port/zlib/deflate.h | 688 +++---
win32port/zlib/gzclose.c | 50 +-
win32port/zlib/gzguts.h | 325 ++-
win32port/zlib/gzlib.c | 1157 +++++-----
win32port/zlib/gzread.c | 1242 ++++++-----
win32port/zlib/gzwrite.c | 1096 +++++----
win32port/zlib/infback.c | 1272 ++++++-----
win32port/zlib/inffast.c | 680 +++---
win32port/zlib/inffast.h | 22 +-
win32port/zlib/inffixed.h | 188 +-
win32port/zlib/inflate.c | 2976 +++++++++++++------------
win32port/zlib/inflate.h | 244 +-
win32port/zlib/inftrees.c | 636 +++---
win32port/zlib/inftrees.h | 124 +-
win32port/zlib/trees.c | 2468 +++++++++++----------
win32port/zlib/trees.h | 256 +--
win32port/zlib/uncompr.c | 118 +-
win32port/zlib/zconf.h | 934 ++++----
win32port/zlib/zlib.h | 3357 ++++++++++++++--------------
win32port/zlib/zutil.c | 642 +++---
win32port/zlib/zutil.h | 526 ++---
69 files changed, 19556 insertions(+), 20145 deletions(-)
user api changes
----------------
- libwebsockets_serve_http_file() now takes a context as first argument
- libwebsockets_get_peer_addresses() now takes a context and wsi as first
two arguments
user api additions
------------------
- lwsl_...() logging apis, default to stderr but retargetable by user code;
may be used also by user code
- lws_set_log_level() set which logging apis are able to emit (defaults to
notice, warn, err severities), optionally set the emit callback
- lwsl_emit_syslog() helper callback emits to syslog
- lws_daemonize() helper code that forks the app into a headless daemon
properly, maintains a lock file with pid in suitable for sysvinit etc to
control lifecycle
- LWS_CALLBACK_HTTP_FILE_COMPLETION callback added since http file
transfer is now asynchronous (see test server code)
- lws_frame_is_binary() from a wsi pointer, let you know if the received
data was sent in BINARY mode
user api removals
-----------------
- libwebsockets_fork_service_loop() - no longer supported (had intractable problems)
arrange your code to act from the user callback instead from same
process context as the service loop
- libwebsockets_broadcast() - use libwebsocket_callback_on_writable[_all_protocol]()
instead from same process context as the service loop. See the test apps
for examples.
- x-google-mux() removed until someone wants it
- pre -v13 (ancient) protocol support removed
New features
------------
- echo test server and client compatible with echo.websocket.org added
- many new configure options (see README.build) to reduce footprint of the
library to what you actually need, eg, --without-client and
--without-server
- http + websocket server can build to as little as 12K .text for ARM
- no more MAX_CLIENTS limitation; adapts to support the max number of fds
allowed to the process by ulimit, defaults to 1024 on Fedora and
Ubuntu. Use ulimit to control this without needing to configure
the library. Code here is smaller and faster.
- adaptive ratio of listen socket to connection socket service allows
good behaviour under Apache ab test load. Tested with thousands
of simultaneous connections
- reduction in per-connection memory footprint by moving to a union to hold
mutually-exclusive state for the connection
- robustness: Out of Memory taken care of for all allocation code now
- internal getifaddrs option if your toolchain lacks it (some uclibc)
- configurable memory limit for deflate operations
- improvements in SSL code nonblocking operation, possible hang solved,
some SSL operations broken down into pollable states so there is
no library blocking, timeout coverage for SSL_connect
- extpoll test server merged into single test server source
- robustness: library should deal with all recoverable socket conditions
- rx flowcontrol for backpressure notification fixed and implmeneted
correctly in the test server
- optimal lexical parser added for header processing; all headers in a
single 276-byte state table
- latency tracking api added (configure --with-latency)
- Improved in-tree documentation, REAME.build, README.coding,
README.test-apps, changelog
- Many small fixes
v1.0-chrome25-firefox17 (6cd1ea9b005933f)
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