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sul: more paranoid casting vs libc header types

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This commit is contained in:
Andy Green 2019-10-27 15:46:58 +00:00
parent 4d23fb1389
commit 5bd1bed6e9
16 changed files with 657 additions and 30 deletions
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8
include/libwebsockets.h
View file

@ -48,10 +48,10 @@ typedef struct lws_dsh lws_dsh_t;
* CARE: everything using cmake defines needs to be below here
*/
#define LWS_US_PER_SEC 1000000
#define LWS_MS_PER_SEC 1000
#define LWS_US_PER_MS 1000
#define LWS_NS_PER_US 1000
#define LWS_US_PER_SEC ((lws_usec_t)1000000)
#define LWS_MS_PER_SEC ((lws_usec_t)1000)
#define LWS_US_PER_MS ((lws_usec_t)1000)
#define LWS_NS_PER_US ((lws_usec_t)1000)
#define LWS_KI (1024)
#define LWS_MI (LWS_KI * 1024)

2
include/libwebsockets/lws-timeout-timer.h
View file

@ -113,7 +113,7 @@ void
lws_set_timeout_us(struct lws *wsi, enum pending_timeout reason, lws_usec_t us);
#define LWS_SET_TIMER_USEC_CANCEL ((lws_usec_t)-1ll)
#define LWS_USEC_PER_SEC (1000000ll)
#define LWS_USEC_PER_SEC ((lws_usec_t)1000000)
/**
* lws_set_timer_usecs() - schedules a callback on the wsi in the future

67
lib/core-net/sorted-usec-list.c
View file

@ -44,6 +44,7 @@ int
__lws_sul_insert(lws_dll2_owner_t *own, lws_sorted_usec_list_t *sul,
lws_usec_t us)
{
lws_usec_t now = lws_now_usecs();
lws_dll2_remove(&sul->list);
if (us == LWS_SET_TIMER_USEC_CANCEL) {
@ -53,7 +54,7 @@ __lws_sul_insert(lws_dll2_owner_t *own, lws_sorted_usec_list_t *sul,
return 0;
}
sul->us = lws_now_usecs() + us;
sul->us = now + us;
assert(sul->cb);
/*
@ -63,7 +64,28 @@ __lws_sul_insert(lws_dll2_owner_t *own, lws_sorted_usec_list_t *sul,
lws_dll2_add_sorted(&sul->list, own, sul_compare);
// lws_dll2_describe(own, "post-tail-insert");
#if 0 // defined(_DEBUG)
{
lws_usec_t worst = 0;
int n = 1;
lwsl_info("%s: own %p: count %d\n", __func__, own, own->count);
lws_start_foreach_dll_safe(struct lws_dll2 *, p, tp,
lws_dll2_get_head(own)) {
lws_sorted_usec_list_t *sul = (lws_sorted_usec_list_t *)p;
lwsl_info("%s: %d: %llu (+%lld)\n", __func__, n++,
(unsigned long long)sul->us,
(long long)(sul->us - now));
if (sul->us < worst) {
lwsl_err("%s: wrongly sorted sul entry!\n",
__func__);
assert(0);
}
worst = sul->us;
} lws_end_foreach_dll_safe(p, tp);
}
#endif
return 0;
}
@ -82,30 +104,35 @@ lws_sul_schedule(struct lws_context *context, int tsi,
lws_usec_t
__lws_sul_check(lws_dll2_owner_t *own, lws_usec_t usnow)
{
lws_usec_t future_us = 0;
lws_start_foreach_dll_safe(struct lws_dll2 *, p, tp,
lws_dll2_get_head(own)) {
/* .list is always first member in lws_sorted_usec_list_t */
lws_sorted_usec_list_t *sul = (lws_sorted_usec_list_t *)p;
while (lws_dll2_get_head(own)) {
/* .list is always first member in lws_sorted_usec_list_t */
lws_sorted_usec_list_t *sul = (lws_sorted_usec_list_t *)
lws_dll2_get_head(own);
assert(sul->us); /* shouldn't be on the list otherwise */
if (sul->us <= usnow) {
/* seq has timed out... remove him from timeout list */
lws_dll2_remove(&sul->list);
sul->us = 0;
sul->cb(sul);
} else {
if (sul->us > usnow)
/*
* No need to look further if we met one later than now:
* the list is sorted in ascending time order
*/
future_us = sul->us - usnow;
return sul->us - usnow;
break;
}
/* his moment has come... remove him from timeout list */
} lws_end_foreach_dll_safe(p, tp);
lws_dll2_remove(&sul->list);
sul->us = 0;
sul->cb(sul);
/*
* The callback may have done any mixture of delete
* and add sul entries... eg, close a wsi may pull out
* multiple entries making iterating it statefully
* unsafe. Always restart at the current head of list.
*/
}
return future_us;
/*
* Nothing left to take care of in the list (cannot return 0 otherwise
* because we will service anything equal to usnow rather than return)
*/
return 0;
}

2
lib/core-net/wsi-timeout.c
View file

@ -172,7 +172,7 @@ lws_set_timeout_us(struct lws *wsi, enum pending_timeout reason, lws_usec_t us)
lws_pt_lock(pt, __func__);
__lws_sul_insert(&pt->pt_sul_owner, &wsi->sul_timeout, us);
lwsl_debug("%s: %p: %llu us, reason %d\n", __func__, wsi,
lwsl_notice("%s: %p: %llu us, reason %d\n", __func__, wsi,
(unsigned long long)us, reason);
wsi->pending_timeout = reason;

6
lib/plat/unix/unix-misc.c
View file

@ -31,12 +31,14 @@ lws_now_usecs(void)
if (clock_gettime(CLOCK_MONOTONIC, &ts))
return 0;
return (ts.tv_sec * LWS_US_PER_SEC) + (ts.tv_nsec / LWS_NS_PER_US);
return (((lws_usec_t)ts.tv_sec) * LWS_US_PER_SEC) +
((lws_usec_t)ts.tv_nsec / LWS_NS_PER_US);
#else
struct timeval now;
gettimeofday(&now, NULL);
return (now.tv_sec * 1000000ll) + now.tv_usec;
return (((lws_usec_t)now.tv_sec) * LWS_US_PER_SEC) +
(lws_usec_t)now.tv_usec;
#endif
}

12
lib/plat/unix/unix-service.c
View file

@ -57,6 +57,8 @@ _lws_plat_service_forced_tsi(struct lws_context *context, int tsi)
return 0;
}
#define LWS_POLL_WAIT_LIMIT 2000000000
int
_lws_plat_service_tsi(struct lws_context *context, int timeout_ms, int tsi)
{
@ -83,7 +85,7 @@ _lws_plat_service_tsi(struct lws_context *context, int timeout_ms, int tsi)
timeout_ms = 0;
else
/* force a default timeout of 23 days */
timeout_ms = 2000000000;
timeout_ms = LWS_POLL_WAIT_LIMIT;
timeout_us = ((lws_usec_t)timeout_ms) * LWS_US_PER_MS;
if (context->event_loop_ops->run_pt)
@ -120,9 +122,15 @@ again:
lws_pt_unlock(pt);
}
/* ensure we don't wrap at 2^31 with poll()'s signed int ms */
timeout_us /= LWS_US_PER_MS; /* ms now */
if (timeout_us > LWS_POLL_WAIT_LIMIT)
timeout_us = LWS_POLL_WAIT_LIMIT;
vpt->inside_poll = 1;
lws_memory_barrier();
n = poll(pt->fds, pt->fds_count, timeout_us / LWS_US_PER_MS);
n = poll(pt->fds, pt->fds_count, timeout_us /* ms now */ );
vpt->inside_poll = 0;
lws_memory_barrier();

78
minimal-examples/ws-server/minimal-ws-server-timer/CMakeLists.txt Normal file
View file

@ -0,0 +1,78 @@
cmake_minimum_required(VERSION 2.8)
include(CheckCSourceCompiles)
set(SAMP lws-minimal-ws-server-timer)
set(SRCS minimal-ws-server.c)
# If we are being built as part of lws, confirm current build config supports
# reqconfig, else skip building ourselves.
#
# If we are being built externally, confirm installed lws was configured to
# support reqconfig, else error out with a helpful message about the problem.
#
MACRO(require_lws_config reqconfig _val result)
if (DEFINED ${reqconfig})
if (${reqconfig})
set (rq 1)
else()
set (rq 0)
endif()
else()
set(rq 0)
endif()
if (${_val} EQUAL ${rq})
set(SAME 1)
else()
set(SAME 0)
endif()
if (LWS_WITH_MINIMAL_EXAMPLES AND NOT ${SAME})
if (${_val})
message("${SAMP}: skipping as lws being built without ${reqconfig}")
else()
message("${SAMP}: skipping as lws built with ${reqconfig}")
endif()
set(${result} 0)
else()
if (LWS_WITH_MINIMAL_EXAMPLES)
set(MET ${SAME})
else()
CHECK_C_SOURCE_COMPILES("#include <libwebsockets.h>\nint main(void) {\n#if defined(${reqconfig})\n return 0;\n#else\n fail;\n#endif\n return 0;\n}\n" HAS_${reqconfig})
if (NOT DEFINED HAS_${reqconfig} OR NOT HAS_${reqconfig})
set(HAS_${reqconfig} 0)
else()
set(HAS_${reqconfig} 1)
endif()
if ((HAS_${reqconfig} AND ${_val}) OR (NOT HAS_${reqconfig} AND NOT ${_val}))
set(MET 1)
else()
set(MET 0)
endif()
endif()
if (NOT MET)
if (${_val})
message(FATAL_ERROR "This project requires lws must have been configured with ${reqconfig}")
else()
message(FATAL_ERROR "Lws configuration of ${reqconfig} is incompatible with this project")
endif()
endif()
endif()
ENDMACRO()
set(requirements 1)
require_lws_config(LWS_ROLE_WS 1 requirements)
require_lws_config(LWS_WITH_SERVER 1 requirements)
if (requirements)
add_executable(${SAMP} ${SRCS})
if (websockets_shared)
target_link_libraries(${SAMP} websockets_shared)
add_dependencies(${SAMP} websockets_shared)
else()
target_link_libraries(${SAMP} websockets)
endif()
endif()

34
minimal-examples/ws-server/minimal-ws-server-timer/README.md Normal file
View file

@ -0,0 +1,34 @@
# lws minimal ws server timer
This is designed to confirm long term stability of ws timers on a
particular platform.
## build
```
$ cmake . && make
```
## Commandline Options
Option|Meaning
---|---
-d|Set logging verbosity
-s|Serve using TLS selfsigned cert (ie, connect to it with https://...)
-h|Strict Host: header checking against vhost name (localhost) and port
-v|Connection validity use 3s / 10s instead of default 5m / 5m10s
## usage
```
$ ./lws-minimal-ws-server-timer
[2018/03/04 09:30:02:7986] USER: LWS minimal ws server | visit http://localhost:7681
[2018/03/04 09:30:02:7986] NOTICE: Creating Vhost 'default' port 7681, 1 protocols, IPv6 on
```
Visit http://localhost:7681 and the browser will connect back to the test
server, you'll see ESTABLISHED logged. That triggers a TIMER event at 20s
intervals which sets the wsi timeout to 60s. It should just stay like
that forever doing the TIMER events at 20s intervals and not sending any
traffic either way.

34
minimal-examples/ws-server/minimal-ws-server-timer/localhost-100y.cert Normal file
View file

@ -0,0 +1,34 @@
-----BEGIN CERTIFICATE-----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KT/m6DSU0xlZ13d6ehLRm7/+Nx47M3XMTRH5qKP/7TTE2s0U6+M0tsGI2zpRi+m6
jzhNyMBTJ1u58qAe3ZW5/+YAiuZYAB6n5bhUp4oFuB5wYbcBywVR8ujInpF8buWQ
Ujy5N8pSNp7szdYsnLJpvAd0sibrNPjC0FQCNrpNjgJmIK3+mKk4kXX7ZTwefoAz
TK4l2pHNuC53QVc/EF++GBLAxmvCDq9ZpMIYi7OmzkkAKKC9Ue6Ef217LFQCFIBK
Izv9cgi9fwPMLhrKleoVRNsecBsCP569WgJXhUnwf2lon4fEZr3+vRuc9shfqnV0
nPN1IMSnzXCast7I2fiuRXdIz96KjlGQpP4XfNVA+RGL7aMnWOFIaVrKWLzAtgzo
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wtmD9phWexm4q2GnTsiL6Ul6cy0QlTJWKVLEUQQ6yda582e23J1AXqtqFcpfoE34
H3afEiGy882b+ZBiwkeV+oq6XVF8sFyr9zYrv9CvWTYlkpTQfLTZSsgPdEHYVcjv
xQ2D+XyDR0aRLRlvxUa9dHGFHLICG34Juq5Ai6lM1EsoD8HSsJpMcmrH7MWw2cKk
ujC3rMdFTtte83wF1uuF4FjUC72+SmcQN7A386BC/nk2TTsJawTDzqwOu/VdZv2g
1WpTHlumlClZeP+G/jkSyDwqNnTu1aodDmUa4xZodfhP1HWPwUKFcq8oQr148QYA
AOlbUOJQU7QwRWd1VbnwhDtQWXC92A2w1n/xkZSR1BM/NUSDhkBSUU1WjMbWg6Gg
mnIZLRerQCu1Oozr87rOQqQakPkyt8BUSNK3K42j2qcfhAONdRl8Hq8Qs5pupy+s
8sdCGDlwR3JNCMv6u48OK87F4mcIxhkSefFJUFII25pCGN5WtE4p5l+9cnO1GrIX
e2Hl/7M0c/lbZ4FvXgARlex2rkgS0Ka06HE=
-----END CERTIFICATE-----

52
minimal-examples/ws-server/minimal-ws-server-timer/localhost-100y.key Normal file
View file

@ -0,0 +1,52 @@
-----BEGIN PRIVATE KEY-----
MIIJQwIBADANBgkqhkiG9w0BAQEFAASCCS0wggkpAgEAAoICAQCjYtuWaICCY0tJ
PubxpIgIL+WWmz/fmK8IQr11Wtee6/IUyUlo5I602mq1qcLhT/kmpoR8Di3DAmHK
nSWdPWtn1BtXLErLlUiHgZDrZWInmEBjKM1DZf+CvNGZ+EzPgBv5nTekLWcfI5ZZ
toGuIP1Dl/IkNDw8zFz4cpiMe/BFGemyxdHhLrKHSm8Eo+nT734tItnHKT/m6DSU
0xlZ13d6ehLRm7/+Nx47M3XMTRH5qKP/7TTE2s0U6+M0tsGI2zpRi+m6jzhNyMBT
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fwPMLhrKleoVRNsecBsCP569WgJXhUnwf2lon4fEZr3+vRuc9shfqnV0nPN1IMSn
zXCast7I2fiuRXdIz96KjlGQpP4XfNVA+RGL7aMnWOFIaVrKWLzAtgzoGMTvP/Au
ehKXncBJhYtW0ltTioVx+5yTYSAZWl+IssmXjefxJqYi2/7QWmv1QC9psNcjTMaB
QLN03T1Qelbs7Y27sxdEnNUth4kI+wIDAQABAoICAFWe8MQZb37k2gdAV3Y6aq8f
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aJavCpaKoIMowy/aGCbvAvjNPpU3unU8jdl/t08EXs79S5IKPcgAx87sTTi7KDN5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-----END PRIVATE KEY-----

134
minimal-examples/ws-server/minimal-ws-server-timer/minimal-ws-server.c Normal file
View file

@ -0,0 +1,134 @@
/*
* lws-minimal-ws-server-timer
*
* Written in 2010-2019 by Andy Green <andy@warmcat.com>
*
* This file is made available under the Creative Commons CC0 1.0
* Universal Public Domain Dedication.
*
* This demonstrates the most minimal http server you can make with lws,
* with an added websocket chat server.
*
* To keep it simple, it serves stuff in the subdirectory "./mount-origin" of
* the directory it was started in.
* You can change that by changing mount.origin.
*/
#include <libwebsockets.h>
#include <string.h>
#include <signal.h>
static int
callback_protocol(struct lws *wsi, enum lws_callback_reasons reason,
void *user, void *in, size_t len)
{
switch (reason) {
case LWS_CALLBACK_ESTABLISHED:
lwsl_user("LWS_CALLBACK_ESTABLISHED\n");
lws_set_timer_usecs(wsi, 20 * LWS_USEC_PER_SEC);
lws_set_timeout(wsi, 1, 60);
break;
case LWS_CALLBACK_TIMER:
lwsl_user("LWS_CALLBACK_TIMER\n");
lws_set_timer_usecs(wsi, 20 * LWS_USEC_PER_SEC);
lws_set_timeout(wsi, 1, 60);
break;
case LWS_CALLBACK_CLOSED:
lwsl_user("LWS_CALLBACK_CLOSED\n");
break;
default:
break;
}
return 0;
}
static struct lws_protocols protocols[] = {
{ "http", lws_callback_http_dummy, 0, 0 },
{ "timer", callback_protocol, 0, 0 },
{ NULL, NULL, 0, 0 } /* terminator */
};
static int interrupted;
static const struct lws_http_mount mount = {
/* .mount_next */ NULL, /* linked-list "next" */
/* .mountpoint */ "/", /* mountpoint URL */
/* .origin */ "./mount-origin", /* serve from dir */
/* .def */ "index.html", /* default filename */
/* .protocol */ NULL,
/* .cgienv */ NULL,
/* .extra_mimetypes */ NULL,
/* .interpret */ NULL,
/* .cgi_timeout */ 0,
/* .cache_max_age */ 0,
/* .auth_mask */ 0,
/* .cache_reusable */ 0,
/* .cache_revalidate */ 0,
/* .cache_intermediaries */ 0,
/* .origin_protocol */ LWSMPRO_FILE, /* files in a dir */
/* .mountpoint_len */ 1, /* char count */
/* .basic_auth_login_file */ NULL,
};
void sigint_handler(int sig)
{
interrupted = 1;
}
int main(int argc, const char **argv)
{
struct lws_context_creation_info info;
struct lws_context *context;
const char *p;
int n = 0, logs = LLL_USER | LLL_ERR | LLL_WARN | LLL_NOTICE
/* for LLL_ verbosity above NOTICE to be built into lws,
* lws must have been configured and built with
* -DCMAKE_BUILD_TYPE=DEBUG instead of =RELEASE */
/* | LLL_INFO */ /* | LLL_PARSER */ /* | LLL_HEADER */
/* | LLL_EXT */ /* | LLL_CLIENT */ /* | LLL_LATENCY */
/* | LLL_DEBUG */;
signal(SIGINT, sigint_handler);
if ((p = lws_cmdline_option(argc, argv, "-d")))
logs = atoi(p);
lws_set_log_level(logs, NULL);
lwsl_user("LWS minimal ws server | visit http://localhost:7681 (-s = use TLS / https)\n");
memset(&info, 0, sizeof info); /* otherwise uninitialized garbage */
info.port = 7681;
info.mounts = &mount;
info.protocols = protocols;
info.vhost_name = "localhost";
info.options =
LWS_SERVER_OPTION_HTTP_HEADERS_SECURITY_BEST_PRACTICES_ENFORCE;
if (lws_cmdline_option(argc, argv, "-s")) {
lwsl_user("Server using TLS\n");
info.options |= LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT;
info.ssl_cert_filepath = "localhost-100y.cert";
info.ssl_private_key_filepath = "localhost-100y.key";
}
if (lws_cmdline_option(argc, argv, "-h"))
info.options |= LWS_SERVER_OPTION_VHOST_UPG_STRICT_HOST_CHECK;
context = lws_create_context(&info);
if (!context) {
lwsl_err("lws init failed\n");
return 1;
}
while (n >= 0 && !interrupted)
n = lws_service(context, 0);
lws_context_destroy(context);
return 0;
}

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minimal-examples/ws-server/minimal-ws-server-timer/mount-origin/example.js Normal file
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function get_appropriate_ws_url(extra_url)
{
var pcol;
var u = document.URL;
/*
* We open the websocket encrypted if this page came on an
* https:// url itself, otherwise unencrypted
*/
if (u.substring(0, 5) === "https") {
pcol = "wss://";
u = u.substr(8);
} else {
pcol = "ws://";
if (u.substring(0, 4) === "http")
u = u.substr(7);
}
u = u.split("/");
/* + "/xxx" bit is for IE10 workaround */
return pcol + u[0] + "/" + extra_url;
}
function new_ws(urlpath, protocol)
{
if (typeof MozWebSocket != "undefined")
return new MozWebSocket(urlpath, protocol);
return new WebSocket(urlpath, protocol);
}
document.addEventListener("DOMContentLoaded", function() {
var ws = new_ws(get_appropriate_ws_url(""), "timer");
try {
ws.onopen = function() {
document.getElementById("m").disabled = 0;
document.getElementById("b").disabled = 0;
};
ws.onmessage =function got_packet(msg) {
document.getElementById("r").value =
document.getElementById("r").value + msg.data + "\n";
document.getElementById("r").scrollTop =
document.getElementById("r").scrollHeight;
};
ws.onclose = function(){
document.getElementById("m").disabled = 1;
document.getElementById("b").disabled = 1;
};
} catch(exception) {
alert("<p>Error " + exception);
}
function sendmsg()
{
ws.send(document.getElementById("m").value);
document.getElementById("m").value = "";
}
document.getElementById("b").addEventListener("click", sendmsg);
}, false);

0
minimal-examples/ws-server/minimal-ws-server-timer/mount-origin/favicon.ico Normal file
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minimal-examples/ws-server/minimal-ws-server-timer/mount-origin/index.html Normal file
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<html>
<head>
<meta charset=utf-8 http-equiv="Content-Language" content="en"/>
<script src="/example.js"></script>
</head>
<body>
<img src="libwebsockets.org-logo.svg">
<img src="strict-csp.svg"><br>
LWS wsi timer <b>minimal ws server timer example</b>.<br>
This opens a ws connection back to the server and just sits there
setting the timer to fire every 20s, which resets the wsi timeout
for 60s each timer. It should just stay like that forever.
</body>
</html>

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minimal-examples/ws-server/minimal-ws-server-timer/mount-origin/libwebsockets.org-logo.svg Normal file
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<defs>
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