
1) This makes lwsws run a parent process with the original permissions. But this process is only able to respond to SIGHUP, it doesn't do anything else. 2) You can send this parent process a SIGHUP now to cause it to - close listening sockets in existing lwsws processes - mark those processes as to exit when the number of active connections on the falls to zero - spawn a fresh child process from scratch, using latest configuration file content, latest plugins, etc. It can now reopen listening sockets if it chooses to, or open different listen ports or whatever. Notes: 1) lws_context_destroy() has been split into two pieces... the reason for the split is the first part closes the per-vhost protocols, but since they may have created libuv objects in the per-vhost protocol storage, these cannot be freed until after the loop has been run. That's the purpose of the second part of the context destruction, lws_context_destroy2(). For compatibility, if you are not using libuv, the first part calls the second part. However if you are using libuv, you must now call the second part from your own main.c after the first part.
167 lines
4.2 KiB
C
167 lines
4.2 KiB
C
/*
|
|
* ws protocol handler plugin for "dumb increment"
|
|
*
|
|
* Copyright (C) 2010-2016 Andy Green <andy@warmcat.com>
|
|
*
|
|
* This file is made available under the Creative Commons CC0 1.0
|
|
* Universal Public Domain Dedication.
|
|
*
|
|
* The person who associated a work with this deed has dedicated
|
|
* the work to the public domain by waiving all of his or her rights
|
|
* to the work worldwide under copyright law, including all related
|
|
* and neighboring rights, to the extent allowed by law. You can copy,
|
|
* modify, distribute and perform the work, even for commercial purposes,
|
|
* all without asking permission.
|
|
*
|
|
* These test plugins are intended to be adapted for use in your code, which
|
|
* may be proprietary. So unlike the library itself, they are licensed
|
|
* Public Domain.
|
|
*/
|
|
|
|
#if !defined (LWS_PLUGIN_STATIC)
|
|
#define LWS_DLL
|
|
#define LWS_INTERNAL
|
|
#include "../lib/libwebsockets.h"
|
|
#endif
|
|
|
|
#include <string.h>
|
|
|
|
#if defined(LWS_WITH_ESP8266)
|
|
#define DUMB_PERIOD 50
|
|
#else
|
|
#define DUMB_PERIOD 50
|
|
#endif
|
|
|
|
struct per_vhost_data__dumb_increment {
|
|
uv_timer_t timeout_watcher;
|
|
struct lws_context *context;
|
|
struct lws_vhost *vhost;
|
|
const struct lws_protocols *protocol;
|
|
};
|
|
|
|
struct per_session_data__dumb_increment {
|
|
int number;
|
|
};
|
|
|
|
static void
|
|
uv_timeout_cb_dumb_increment(uv_timer_t *w
|
|
#if UV_VERSION_MAJOR == 0
|
|
, int status
|
|
#endif
|
|
)
|
|
{
|
|
struct per_vhost_data__dumb_increment *vhd = lws_container_of(w,
|
|
struct per_vhost_data__dumb_increment, timeout_watcher);
|
|
lws_callback_on_writable_all_protocol_vhost(vhd->vhost, vhd->protocol);
|
|
}
|
|
|
|
static int
|
|
callback_dumb_increment(struct lws *wsi, enum lws_callback_reasons reason,
|
|
void *user, void *in, size_t len)
|
|
{
|
|
struct per_session_data__dumb_increment *pss =
|
|
(struct per_session_data__dumb_increment *)user;
|
|
struct per_vhost_data__dumb_increment *vhd =
|
|
(struct per_vhost_data__dumb_increment *)
|
|
lws_protocol_vh_priv_get(lws_get_vhost(wsi),
|
|
lws_get_protocol(wsi));
|
|
unsigned char buf[LWS_PRE + 20];
|
|
unsigned char *p = &buf[LWS_PRE];
|
|
int n, m;
|
|
|
|
switch (reason) {
|
|
case LWS_CALLBACK_PROTOCOL_INIT:
|
|
vhd = lws_protocol_vh_priv_zalloc(lws_get_vhost(wsi),
|
|
lws_get_protocol(wsi),
|
|
sizeof(struct per_vhost_data__dumb_increment));
|
|
vhd->context = lws_get_context(wsi);
|
|
vhd->protocol = lws_get_protocol(wsi);
|
|
vhd->vhost = lws_get_vhost(wsi);
|
|
|
|
uv_timer_init(lws_uv_getloop(vhd->context, 0),
|
|
&vhd->timeout_watcher);
|
|
uv_timer_start(&vhd->timeout_watcher,
|
|
uv_timeout_cb_dumb_increment, DUMB_PERIOD, DUMB_PERIOD);
|
|
|
|
break;
|
|
|
|
case LWS_CALLBACK_PROTOCOL_DESTROY:
|
|
if (!vhd)
|
|
break;
|
|
// lwsl_notice("di: LWS_CALLBACK_PROTOCOL_DESTROY: v=%p, ctx=%p\n", vhd, vhd->context);
|
|
uv_timer_stop(&vhd->timeout_watcher);
|
|
uv_close((uv_handle_t *)&vhd->timeout_watcher, NULL);
|
|
break;
|
|
|
|
case LWS_CALLBACK_ESTABLISHED:
|
|
pss->number = 0;
|
|
break;
|
|
|
|
case LWS_CALLBACK_SERVER_WRITEABLE:
|
|
n = lws_snprintf((char *)p, sizeof(buf) - LWS_PRE, "%d", pss->number++);
|
|
m = lws_write(wsi, p, n, LWS_WRITE_TEXT);
|
|
if (m < n) {
|
|
lwsl_err("ERROR %d writing to di socket\n", n);
|
|
return -1;
|
|
}
|
|
break;
|
|
|
|
case LWS_CALLBACK_RECEIVE:
|
|
if (len < 6)
|
|
break;
|
|
if (strcmp((const char *)in, "reset\n") == 0)
|
|
pss->number = 0;
|
|
if (strcmp((const char *)in, "closeme\n") == 0) {
|
|
lwsl_notice("dumb_inc: closing as requested\n");
|
|
lws_close_reason(wsi, LWS_CLOSE_STATUS_GOINGAWAY,
|
|
(unsigned char *)"seeya", 5);
|
|
return -1;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define LWS_PLUGIN_PROTOCOL_DUMB_INCREMENT \
|
|
{ \
|
|
"dumb-increment-protocol", \
|
|
callback_dumb_increment, \
|
|
sizeof(struct per_session_data__dumb_increment), \
|
|
10, /* rx buf size must be >= permessage-deflate rx size */ \
|
|
}
|
|
|
|
#if !defined (LWS_PLUGIN_STATIC)
|
|
|
|
static const struct lws_protocols protocols[] = {
|
|
LWS_PLUGIN_PROTOCOL_DUMB_INCREMENT
|
|
};
|
|
|
|
LWS_EXTERN LWS_VISIBLE int
|
|
init_protocol_dumb_increment(struct lws_context *context,
|
|
struct lws_plugin_capability *c)
|
|
{
|
|
if (c->api_magic != LWS_PLUGIN_API_MAGIC) {
|
|
lwsl_err("Plugin API %d, library API %d", LWS_PLUGIN_API_MAGIC,
|
|
c->api_magic);
|
|
return 1;
|
|
}
|
|
|
|
c->protocols = protocols;
|
|
c->count_protocols = ARRAY_SIZE(protocols);
|
|
c->extensions = NULL;
|
|
c->count_extensions = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
LWS_EXTERN LWS_VISIBLE int
|
|
destroy_protocol_dumb_increment(struct lws_context *context)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#endif
|