mirror of
https://github.com/warmcat/libwebsockets.git
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c9731c5f17
This is a huge patch that should be a global NOP. For unix type platforms it enables -Wconversion to issue warnings (-> error) for all automatic casts that seem less than ideal but are normally concealed by the toolchain. This is things like passing an int to a size_t argument. Once enabled, I went through all args on my default build (which build most things) and tried to make the removed default cast explicit. With that approach it neither change nor bloat the code, since it compiles to whatever it was doing before, just with the casts made explicit... in a few cases I changed some length args from int to size_t but largely left the causes alone. From now on, new code that is relying on less than ideal casting will complain and nudge me to improve it by warnings.
137 lines
3.4 KiB
C
137 lines
3.4 KiB
C
/*
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* ws protocol handler plugin for "dumb increment"
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*
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* Written in 2010-2019 by Andy Green <andy@warmcat.com>
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*
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* This file is made available under the Creative Commons CC0 1.0
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* Universal Public Domain Dedication.
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*
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* The person who associated a work with this deed has dedicated
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* the work to the public domain by waiving all of his or her rights
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* to the work worldwide under copyright law, including all related
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* and neighboring rights, to the extent allowed by law. You can copy,
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* modify, distribute and perform the work, even for commercial purposes,
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* all without asking permission.
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*
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* These test plugins are intended to be adapted for use in your code, which
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* may be proprietary. So unlike the library itself, they are licensed
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* Public Domain.
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*/
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#if !defined (LWS_PLUGIN_STATIC)
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#define LWS_DLL
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#define LWS_INTERNAL
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#include <libwebsockets.h>
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#endif
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#include <string.h>
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#define DUMB_PERIOD_US 50000
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struct pss__dumb_increment {
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int number;
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};
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struct vhd__dumb_increment {
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const unsigned int *options;
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};
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static int
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callback_dumb_increment(struct lws *wsi, enum lws_callback_reasons reason,
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void *user, void *in, size_t len)
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{
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struct pss__dumb_increment *pss = (struct pss__dumb_increment *)user;
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struct vhd__dumb_increment *vhd =
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(struct vhd__dumb_increment *)
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lws_protocol_vh_priv_get(lws_get_vhost(wsi),
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lws_get_protocol(wsi));
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uint8_t buf[LWS_PRE + 20], *p = &buf[LWS_PRE];
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const struct lws_protocol_vhost_options *opt;
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int n, m;
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switch (reason) {
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case LWS_CALLBACK_PROTOCOL_INIT:
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vhd = lws_protocol_vh_priv_zalloc(lws_get_vhost(wsi),
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lws_get_protocol(wsi),
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sizeof(struct vhd__dumb_increment));
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if (!vhd)
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return -1;
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if ((opt = lws_pvo_search(
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(const struct lws_protocol_vhost_options *)in,
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"options")))
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vhd->options = (unsigned int *)opt->value;
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break;
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case LWS_CALLBACK_ESTABLISHED:
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pss->number = 0;
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if (!vhd->options || !((*vhd->options) & 1))
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lws_set_timer_usecs(wsi, DUMB_PERIOD_US);
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break;
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case LWS_CALLBACK_SERVER_WRITEABLE:
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n = lws_snprintf((char *)p, sizeof(buf) - LWS_PRE, "%d",
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pss->number++);
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m = lws_write(wsi, p, (unsigned int)n, LWS_WRITE_TEXT);
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if (m < n) {
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lwsl_err("ERROR %d writing to di socket\n", n);
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return -1;
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}
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break;
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case LWS_CALLBACK_RECEIVE:
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if (len < 6)
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break;
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if (strncmp((const char *)in, "reset\n", 6) == 0)
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pss->number = 0;
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if (strncmp((const char *)in, "closeme\n", 8) == 0) {
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lwsl_notice("dumb_inc: closing as requested\n");
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lws_close_reason(wsi, LWS_CLOSE_STATUS_GOINGAWAY,
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(unsigned char *)"seeya", 5);
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return -1;
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}
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break;
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case LWS_CALLBACK_TIMER:
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if (!vhd->options || !((*vhd->options) & 1)) {
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lws_callback_on_writable_all_protocol_vhost(
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lws_get_vhost(wsi), lws_get_protocol(wsi));
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lws_set_timer_usecs(wsi, DUMB_PERIOD_US);
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}
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break;
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default:
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break;
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}
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return 0;
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}
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#define LWS_PLUGIN_PROTOCOL_DUMB_INCREMENT \
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{ \
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"dumb-increment-protocol", \
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callback_dumb_increment, \
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sizeof(struct pss__dumb_increment), \
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10, /* rx buf size must be >= permessage-deflate rx size */ \
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0, NULL, 0 \
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}
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#if !defined (LWS_PLUGIN_STATIC)
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static const struct lws_protocols protocols[] = {
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LWS_PLUGIN_PROTOCOL_DUMB_INCREMENT
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};
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LWS_VISIBLE const lws_plugin_protocol_t dumb_increment = {
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.hdr = {
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"dumb increment",
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"lws_protocol_plugin",
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LWS_PLUGIN_API_MAGIC
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},
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.protocols = protocols,
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.count_protocols = LWS_ARRAY_SIZE(protocols),
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.extensions = NULL,
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.count_extensions = 0,
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};
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#endif
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