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473 commits

Author SHA1 Message Date
Andy Green
fc295b7959 muxable client: make http support generic
h1 and h2 has a bunch of code supporting autobinding outgoing client connections
to be streams in, or queued as pipelined on, the same / existing single network
connection, if it's to the same endpoint.

Adapt this http-specific code and active connection tracking to be usable for
generic muxable protocols the same way.
2019-10-10 16:34:37 +01:00
Andy Green
dabd865a5c async-dns: update for lws_retry udp 2019-10-10 16:34:37 +01:00
Andy Green
04f99f1499 lws_retry: udp support 2019-10-10 16:34:37 +01:00
Andy Green
bb7f96d32b cmdline: introduce builtin switches
Rather than do all switches by hand on the minimal examples,
add a helper that knows some "builtin" ones like -d and
others to set context options you might want to use in
any example.
2019-10-10 16:34:37 +01:00
Andy Green
bce1f01370 lws_state and system state
Introduce a generic lws_state object with notification handlers
that may be registered in a chain.

Implement one of those in the context to manage the "system state".

Allow other pieces of lws and user code to register notification
handlers on a context list.  Handlers can object to or take over
responsibility to move forward and retry system state changes if
they know that some dependent action must succeed first.

For example if the system time is invalid, we cannot move on to
a state where anything can do tls until that has been corrected.
2019-09-22 09:35:07 -07:00
Andy Green
f9f6bb66fe lws_validity: unified connection validity tracking
Refactor everything around ping / pong handling in ws and h2, so there
is instead a protocol-independent validity lws_sul tracking how long it
has been since the last exchange that confirms the operation of the
network connection in both directions.

Clean out periodic role callback and replace the last two role users
with discrete lws_sul for each pt.
2019-09-22 09:35:07 -07:00
Jakob Szumacher
503bb8f8c9 client: LCCSCF_ALLOW_INSECURE
AG add options the minimal http client related to this
2019-09-22 09:35:07 -07:00
Andy Green
6cae9d3021 doxygen: cleanup and add recent includes 2019-09-22 09:35:07 -07:00
Andy Green
ba754c4cb2 h2: unify immortal stream tracking across SSE and ws substreams
It was already correct but add helpers to isolate and deduplicate
processing adding and closing a generically immortal stream.

Change the default 31s h2 network connection timeout to be settable
by .keepalive_timeout if nonzero.

Add a public api allowing a client h2 stream to transition to
half-closed LOCAL (by sending a 0-byte DATA with END_STREAM) and
mark itself as immortal to create a read-only long-poll stream
if the server allows it.

Add a vhost server option flag LWS_SERVER_OPTION_VH_H2_HALF_CLOSED_LONG_POLL
which allows the vhost to treat half-closed remotes as immortal long
poll streams.
2019-09-22 03:08:36 -07:00
Andy Green
4e8497b28a context-vhost options: move to uint64_t 2019-09-22 03:08:36 -07:00
Andy Green
d42f434a77 lws_sul: make it clear NULL no longer valid in lws_service_fd 2019-09-22 03:08:36 -07:00
Andy Green
78c7b0651e buflist: add static reason logging to internal aware apis 2019-09-22 03:08:36 -07:00
Andy Green
d808748cd6 detailed latency stats
Remove LWS_LATENCY.

Add the option LWS_WITH_DETAILED_LATENCY, allowing lws to collect very detailed
information on every read and write, and allow the user code to provide
a callback to process events.
2019-09-22 03:06:59 -07:00
Andy Green
c591e1adfc asynchronous dns for ipv4 and ipv6
This adds the option to have lws do its own dns resolution on
the event loop, without blocking.  Existing implementations get
the name resolution done by the libc, which is blocking.  In
the case you are opening client connections but need to carefully
manage latency, another connection opening and doing the name
resolution becomes a big problem.

Currently it supports

 - ipv4 / A records
 - ipv6 / AAAA records
 - ipv4-over-ipv6 ::ffff:1.2.3.4 A record promotion for ipv6
 - only one server supported over UDP :53
 - nameserver discovery on linux, windows, freertos

It also has some nice advantages

 - lws-style paranoid response parsing
 - random unique tid generation to increase difficulty of poisoning
 - it's really integrated with the lws event loop, it does not spawn
   threads or use the libc resolver, and of course no blocking at all
 - platform-specific server address capturing (from /etc/resolv.conf
   on linux, windows apis on windows)
 - it has LRU caching
 - piggybacking (multiple requests before the first completes go on
   a list on the first request, not spawn multiple requests)
 - observes TTL in cache
 - TTL and timeout use lws_sul timers on the event loop
 - ipv6 pieces only built if cmake LWS_IPV6 enabled
2019-09-19 06:54:53 +01:00
Andy Green
8b37f98feb tokenize: flag for # as rest of line comment
Add a flag for tokenizing config where # indicates
the rest of the line is a comment (eg, /etc/resolv.conf)
2019-09-16 11:09:05 +01:00
Andy Green
35b23c3996 network: ipv4 and 6 aware helpers
Add helpers to parse and print ipv4 and ipv6 numeric addresses
in all the canonical formats.

Expose internal lws_sockaddr46 union and add helper wrappers
to directly operate on sa46.
2019-09-15 11:04:16 +01:00
Andy Green
5f238ed86d unaligned serialization and deserialization helpers
u16, u32 and u64 read and write, plus VBI read and write for up to
64bit / 10 bytes, all to and from uint8_t.
2019-09-06 15:30:51 +01:00
Andy Green
3cbeef5d26 lws_tls_client_vhost_extra_cert_mem 2019-09-06 15:30:51 +01:00
Andy Green
adb6379df0 base64: stateful decode 2019-09-06 15:30:51 +01:00
Andy Green
61b5a37a3a lws_retry: use base ms number and set jitter percentage 2019-09-06 15:30:51 +01:00
Andy Green
0fa5563d18 freertos: rename esp32 plat to freertos 2019-08-26 09:58:57 +01:00
Andy Green
2a98642cff c++: establish a single place for opaque forward references 2019-08-18 05:40:56 +01:00
Andy Green
26319663f7 license: switch LGPLv2.1+SLE parts to MIT 2019-08-14 10:44:38 +01:00
Andy Green
b606c883f3 lws_system 2019-08-14 08:59:12 +01:00
Andy Green
f00194c321 lws_dsh 2019-08-12 12:45:31 +01:00
Andy Green
7b517eac87 lws_inform_client_conn_fail
There are many places where we have the same code to inform about client
connection failure... consolidate it
2019-08-12 12:44:36 +01:00
Andy Green
2fc35ef6bd stats: move to pt and improve presentation 2019-08-12 06:18:04 +01:00
Andy Green
498a4e2bd7 sul: all timed objects use a single pt sul list
wsi timeout, wsi hrtimer, sequencer timeout and vh-protocol timer
all now participate on a single sorted us list.

The whole idea of polling wakes is thrown out, poll waits ignore the
timeout field and always use infinite timeouts.

Introduce a public api that can schedule its own callback from the event
loop with us resolution (usually ms is all the platform can do).

Upgrade timeouts and sequencer timeouts to also be able to use us resolution.

Introduce a prepared fakewsi in the pt, so we don't have to allocate
one on the heap when we need it.

Directly handle vh-protocol timer if LWS_MAX_SMP == 1
2019-08-09 10:12:09 +01:00
Andy Green
3c12fd72e8 unify us sorted waits
There are quite a few linked-lists of things that want events after
some period.  This introduces a type binding an lws_dll2 for the
list and a lws_usec_t for the duration.

The wsi timeouts, the hrtimer and the sequencer timeouts are converted
to use these, also in the common event wait calculation.
2019-08-08 22:39:47 +01:00
Andy Green
45ec3ce369 lws_dll: upgrade all instances to lws_dll2
lws_dll2 removes the downsides of lws_dll and adds new features like a
running member count and explicit owner type... it's cleaner and more
robust (eg, nodes know their owner, so they can casually switch between
list owners and remove themselves without the code knowing the owner).

This deprecates lws_dll, but since it's public it allows it to continue
to be built for 4.0 release if you give cmake LWS_WITH_DEPRECATED_LWS_DLL.

All remaining internal users of lws_dll are migrated to lws_dll2.
2019-08-08 16:58:55 +01:00
Andy Green
fed78bef42 sequencer: upgrade timeout to use us
Adapt service loops and event libs to use microsecond waits
internally, for hrtimer and sequencer.  Reduce granularity
according to platform / event lib wait.

Add a helper so there's a single place to extend it.
2019-08-08 09:45:09 +01:00
Andy Green
c27c38ffbc rtos: use mbedtls random api 2019-08-08 09:45:09 +01:00
Andy Green
1d954d52a3 sequencer: add second aux message arg
Since the messages are queued and then read in order from the event loop
thread, it's not generally safe to pass pointers to argument structs,
since there's no guarantee the lifetime of the thing sending the message
lasted until the sequencer read the message.

This puts pressure on the single void * argument-passed-as-value... this patch
adds a second void * argument-passed-as-value so it's more possible to put
what's needed directly in the argument.

It's also possible to alloc the argument on the heap and have the sequencer
callback free it after it has read it.
2019-08-08 09:45:09 +01:00
Andy Green
f12e116188 lws_retry_bo_t: generic retry backoff
Add a generic table-based backoff scheme and a helper to track the
try count and calculate the next delay in ms.

Allow lws_sequencer_t to be given one of these at creation time...
since the number of creation args is getting a bit too much
convert that to an info struct at the same time.
2019-08-05 14:47:51 +01:00
hjfbswb
15ce3d03b9 solve complilation errors on vs2008
replace snprintf with lws_snprintf
2019-08-01 18:05:38 +01:00
Andy Green
fa8356f882 vhost: lws_get_vhost_by_name 2019-07-30 06:02:23 +01:00
Andy Green
b6b6915837 lws_sequencer_t: allow wsi binding 2019-07-22 14:02:00 -07:00
Andy Green
557d51f1f4 tokenize: LWS_TOKENIZE_F_NO_INTEGERS 2019-07-20 11:27:10 -07:00
Andy Green
080373f18f genhash: add MD5 2019-07-17 13:09:40 -07:00
Andy Green
a67efe80f1 http: make lws_http_get_uri_and_method public 2019-07-14 12:08:51 -07:00
Andy Green
dd14603156 COVA11876: WARN_UNUSED_RESULT on lws_buflist_append_segment 2019-07-13 13:28:54 -07:00
Andy Green
e76982a090 boringssl: deal with loss of EVP_PKEY_new_mac_key
Rewrite HMAC stuff to use HMAC_ apis instead of EVP

Bit trickly since modern OpenSSL has opaque HMAC_CTX and older
OpenSSL does not have any apis to allocate and free it.

Add another cmake check for the allocation api to decide
what to do.
2019-07-09 18:18:10 +01:00
Andy Green
3b44a745c9 h2-tx-credit-disallow-overflow 2019-07-08 08:48:58 +01:00
Andy Green
a7e1bac4ac unit test sequencer 2019-06-29 21:08:36 +01:00
Ilan Pegoraro
0123b4381f vhost: bind: make failure to bind optionally fatal
When creating a vhost and the port is already bound to another process
this flag would allow the user code to choose to have the
lws_create_vhost function to fail and return a null pointer.
2019-06-29 21:08:36 +01:00
Andy Green
0ada40ce92 abstract: allow completely generic instantiation and destruction 2019-06-26 14:33:34 +01:00
Andy Green
b3d6e28bc7 lws_sequencer 2019-06-25 12:10:18 +01:00
Andy Green
65afc126a8 rtos: dont declare pollfd if POLLIN already defined 2019-06-20 07:37:52 +01:00
Andy Green
a72b422be3 abstract: add abstract transport tokens
SMTP was improved to use the new abstract stuff a while ago,
but it was only implemented with raw socket abstract transport,
and a couple of 'api cheats' remained passing network information
for the peer connection through the supposedly abstract apis.

This patch adds a flexible generic token array to supply
abstract transport-specific information through the abstract apis,
removing the network information from the abstract connect() op.

The SMTP minimal example is modified to use this new method to
pass the network information.

The abstract transport struct was opaque, but there are real
uses to override it in user code, so this patch also makes it
part of the public abi.
2019-06-19 19:10:14 +01:00
Andy Green
4692c1a7ee rtos: clean warnings where uint32_t is an unsigned long 2019-06-07 11:11:46 +01:00