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lwsl_info(" SYSTEM_RANDOM_FILEPATH: '%s'\n", SYSTEM_RANDOM_FILEPATH);
#endif
#if defined(LWS_WITH_HTTP2)
lwsl_info(" HTTP2 support : available\n");
#else
if (lws_plat_context_early_init())
return NULL;
context = lws_zalloc(sizeof(struct lws_context), "context");
if (!context) {
lwsl_err("No memory for websocket context\n");
return NULL;
}
if (info->pt_serv_buf_size)
context->pt_serv_buf_size = info->pt_serv_buf_size;
else
context->pt_serv_buf_size = 4096;
#if defined(LWS_WITH_HTTP2)
context->set = lws_h2_stock_settings;
#endif
#if LWS_MAX_SMP > 1
pthread_mutex_init(&context->lock, NULL);
#endif
#if defined(LWS_WITH_ESP32)
context->last_free_heap = esp_get_free_heap_size();
#endif
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/* default to just the platform fops implementation */
context->fops_platform.LWS_FOP_OPEN = _lws_plat_file_open;
context->fops_platform.LWS_FOP_CLOSE = _lws_plat_file_close;
context->fops_platform.LWS_FOP_SEEK_CUR = _lws_plat_file_seek_cur;
context->fops_platform.LWS_FOP_READ = _lws_plat_file_read;
context->fops_platform.LWS_FOP_WRITE = _lws_plat_file_write;
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/*
* arrange a linear linked-list of fops starting from context->fops
*
* platform fops
* [ -> fops_zip (copied into context so .next settable) ]
* [ -> info->fops ]
*/
context->fops = &context->fops_platform;
prev = (struct lws_plat_file_ops *)context->fops;
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#if defined(LWS_WITH_ZIP_FOPS)
/* make a soft copy so we can set .next */
context->fops_zip = fops_zip;
prev->next = &context->fops_zip;
prev = (struct lws_plat_file_ops *)prev->next;
#endif
/* if user provided fops, tack them on the end of the list */
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if (info->fops)
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context->reject_service_keywords = info->reject_service_keywords;
if (info->external_baggage_free_on_destroy)
context->external_baggage_free_on_destroy =
info->external_baggage_free_on_destroy;
context->simultaneous_ssl_restriction =
info->simultaneous_ssl_restriction;
if (pid_daemon) {
context->started_with_parent = pid_daemon;
lwsl_info(" Started with daemon pid %d\n", pid_daemon);
#if defined(__ANDROID__)
n = getrlimit ( RLIMIT_NOFILE,&rt);
if (-1 == n) {
lwsl_err("Get RLIMIT_NOFILE failed!\n");
return NULL;
}
context->max_fds = rt.rlim_cur;
#else
context->max_fds = getdtablesize();
#endif
if (info->count_threads)
context->count_threads = info->count_threads;
else
context->count_threads = 1;
if (context->count_threads > LWS_MAX_SMP)
context->count_threads = LWS_MAX_SMP;
context->token_limits = info->token_limits;
context->options = info->options;
if (info->timeout_secs)
context->timeout_secs = info->timeout_secs;
else
context->timeout_secs = AWAITING_TIMEOUT;
context->ws_ping_pong_interval = info->ws_ping_pong_interval;
lwsl_info(" default timeout (secs): %u\n", context->timeout_secs);
if (info->max_http_header_data)
context->max_http_header_data = info->max_http_header_data;
else
if (info->max_http_header_data2)
context->max_http_header_data =
info->max_http_header_data2;
else
context->max_http_header_data = LWS_DEF_HEADER_LEN;
/*
* HTTP/1 piplining after POST gets read in pt_serv_buf_size but
* may need stashing in ah->rx, so ensure it's always big enough
*/
if ((int)context->max_http_header_data < (int)context->pt_serv_buf_size)
context->max_http_header_data = context->pt_serv_buf_size;
if (info->max_http_header_pool)
context->max_http_header_pool = info->max_http_header_pool;
else
context->max_http_header_pool = LWS_DEF_HEADER_POOL;
/*
* Allocate the per-thread storage for scratchpad buffers,
* and header data pool
*/
for (n = 0; n < context->count_threads; n++) {
context->pt[n].serv_buf = lws_malloc(context->pt_serv_buf_size,
"pt_serv_buf");
if (!context->pt[n].serv_buf) {
lwsl_err("OOM\n");
return NULL;
}
context->pt[n].context = context;
#endif
context->pt[n].ah_list = NULL;
context->pt[n].ah_pool_length = 0;
}
if (info->fd_limit_per_thread)
context->fd_limit_per_thread = info->fd_limit_per_thread;
else
context->fd_limit_per_thread = context->max_fds /
context->count_threads;
lwsl_info(" Threads: %d each %d fds\n", context->count_threads,
if (!info->ka_interval && info->ka_time > 0) {
lwsl_err("info->ka_interval can't be 0 if ka_time used\n");
return NULL;
}
/* (Issue #264) In order to *avoid breaking backwards compatibility*, we
* enable libev mediated SIGINT handling with a default handler of
* lws_sigint_cb. The handler can be overridden or disabled
* by invoking lws_sigint_cfg after creating the context, but
* before invoking lws_initloop:
*/
context->use_ev_sigint = 1;
#endif /* LWS_WITH_LIBEV */
#ifdef LWS_WITH_LIBUV
/* (Issue #264) In order to *avoid breaking backwards compatibility*, we
* enable libev mediated SIGINT handling with a default handler of
* lws_sigint_cb. The handler can be overridden or disabled
* by invoking lws_sigint_cfg after creating the context, but
* before invoking lws_initloop:
*/
context->use_ev_sigint = 1;
context->lws_uv_sigint_cb = &lws_uv_sigint_cb;
#endif
/* (Issue #264) In order to *avoid breaking backwards compatibility*, we
* enable libev mediated SIGINT handling with a default handler of
* lws_sigint_cb. The handler can be overridden or disabled
* by invoking lws_sigint_cfg after creating the context, but
* before invoking lws_initloop:
*/
context->use_ev_sigint = 1;
context->lws_event_sigint_cb = &lws_event_sigint_cb;
#endif /* LWS_WITH_LIBEVENT */
#if defined(LWS_WITH_PEER_LIMITS)
/* scale the peer hash table according to the max fds for the process,
* so that the max list depth averages 16. Eg, 1024 fd -> 64,
* 102400 fd -> 6400
*/
context->pl_hash_elements =
(context->count_threads * context->fd_limit_per_thread) / 16;
context->pl_hash_table = lws_zalloc(sizeof(struct lws_peer *) *
context->pl_hash_elements, "peer limits hash table");
context->ip_limit_ah = info->ip_limit_ah;
context->ip_limit_wsi = info->ip_limit_wsi;
#endif
(long)sizeof(struct lws_context) +
(context->count_threads * context->pt_serv_buf_size),
(long)sizeof(struct lws_context),
(long)context->count_threads,
context->pt_serv_buf_size);
lwsl_info(" mem: http hdr rsvd: %5lu B (%u thr x (%u + %lu) x %u))\n",
(long)(context->max_http_header_data +
context->max_http_header_pool * context->count_threads,
context->count_threads,
(long)sizeof(struct allocated_headers),
n = sizeof(struct lws_pollfd) * context->count_threads *
context->fd_limit_per_thread;
lwsl_err("OOM allocating %d fds\n", context->max_fds);
if (info->server_string) {
context->server_string = info->server_string;
context->server_string_len = (short)
strlen(context->server_string);
/* each thread serves his own chunk of fds */
for (n = 1; n < (int)info->count_threads; n++)
context->pt[n].fds = context->pt[n - 1].fds +
context->fd_limit_per_thread;
#endif
if (lws_plat_init(context, info))
#if defined(LWS_WITH_HTTP2)
/*
* let the user code see what the platform default SETTINGS were, he
* can modify them when he creates the vhosts.
*/
for (n = 1; n < LWS_H2_SETTINGS_LEN; n++)
info->http2_settings[n] = context->set.s[n];
#endif
/*
* if he's not saying he'll make his own vhosts later then act
* compatibly and make a default vhost using the data in the info
*/
if (!lws_check_opt(info->options, LWS_SERVER_OPTION_EXPLICIT_VHOSTS))
if (!lws_create_vhost(context, info)) {
lwsl_err("Failed to create default vhost\n");
return NULL;
}
lws_context_init_extensions(info, context);
lwsl_info(" mem: per-conn: %5lu bytes + protocol rx buf\n",
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(unsigned long)sizeof(struct lws));
strcpy(context->canonical_hostname, "unknown");
lws_server_get_canonical_hostname(context, info);
#if defined(LWS_HAVE_SYS_CAPABILITY_H) && defined(LWS_HAVE_LIBCAP)
memcpy(context->caps, info->caps, sizeof(context->caps));
context->count_caps = info->count_caps;
#endif
/*
* The event libs handle doing this when their event loop starts,
* if we are using the default poll() service, do it here
*/
if (!LWS_LIBEV_ENABLED(context) &&
!LWS_LIBUV_ENABLED(context) &&
!LWS_LIBEVENT_ENABLED(context) && lws_create_event_pipes(context))
goto bail;
/*
* drop any root privs for this process
* to listen on port < 1023 we would have needed root, but now we are
* listening, we don't want the power for anything else
*/
if (!lws_check_opt(info->options, LWS_SERVER_OPTION_EXPLICIT_VHOSTS))
lws_plat_drop_app_privileges(info);
/*
* give all extensions a chance to create any per-context
* allocations they need
*/
if (info->port != CONTEXT_PORT_NO_LISTEN) {
LWS_EXT_CB_SERVER_CONTEXT_CONSTRUCT, NULL, 0) < 0)
LWS_EXT_CB_CLIENT_CONTEXT_CONSTRUCT, NULL, 0) < 0)
#if defined(LWS_WITH_SELFTESTS)
lws_jws_selftest();
#endif
return context;
bail:
lws_context_destroy(context);
return NULL;
}
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LWS_VISIBLE LWS_EXTERN void
lws_context_deprecate(struct lws_context *context, lws_reload_func cb)
{
struct lws_vhost *vh = context->vhost_list, *vh1;
struct lws *wsi;
/*
* "deprecation" means disable the context from accepting any new
* connections and free up listen sockets to be used by a replacement
* context.
*
* Otherwise the deprecated context remains operational, until its
* number of connected sockets falls to zero, when it is deleted.
*/
/* for each vhost, close his listen socket */
while (vh) {
wsi = vh->lserv_wsi;
if (wsi) {
wsi->socket_is_permanently_unusable = 1;
lws_close_free_wsi(wsi, LWS_CLOSE_STATUS_NOSTATUS);
wsi->context->deprecation_pending_listen_close_count++;
/*
* other vhosts can share the listen port, they
* point to the same wsi. So zap those too.
*/
vh1 = context->vhost_list;
while (vh1) {
if (vh1->lserv_wsi == wsi)
vh1->lserv_wsi = NULL;
vh1 = vh1->vhost_next;
}
}
vh = vh->vhost_next;
}
context->deprecated = 1;
context->deprecation_cb = cb;
}
LWS_VISIBLE LWS_EXTERN int
lws_context_is_deprecated(struct lws_context *context)
{
return context->deprecated;
}
LWS_VISIBLE void
lws_context_destroy2(struct lws_context *context);
static void
lws_vhost_destroy1(struct lws_vhost *vh)
{
const struct lws_protocols *protocol = NULL;
struct lws_context_per_thread *pt;
int n, m = vh->context->count_threads;
struct lws_context *context = vh->context;
struct lws wsi;
lwsl_info("%s\n", __func__);
if (vh->being_destroyed)
return;
vh->being_destroyed = 1;
/*
* Are there other vhosts that are piggybacking on our listen socket?
* If so we need to hand the listen socket off to one of the others
* so it will remain open. If not, leave it attached to the closing
* vhost and it will get closed.
*/
if (vh->lserv_wsi)
lws_start_foreach_ll(struct lws_vhost *, v,
context->vhost_list) {
if (v != vh &&
!v->being_destroyed &&
v->listen_port == vh->listen_port &&
((!v->iface && !vh->iface) ||
(v->iface && vh->iface &&
!strcmp(v->iface, vh->iface)))) {
/*
* this can only be a listen wsi, which is
* restricted... it has no protocol or other
* bindings or states. So we can simply
* swap it to a vhost that has the same
* iface + port, but is not closing.
*/
assert(v->lserv_wsi == NULL);
v->lserv_wsi = vh->lserv_wsi;
vh->lserv_wsi = NULL;
if (v->lserv_wsi)
v->lserv_wsi->vhost = v;
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lwsl_notice("%s: listen skt from %s to %s\n",
__func__, vh->name, v->name);
break;
}
} lws_end_foreach_ll(v, vhost_next);
/*
* Forcibly close every wsi assoicated with this vhost. That will
* include the listen socket if it is still associated with the closing
* vhost.
*/
while (m--) {
pt = &context->pt[m];
for (n = 0; (unsigned int)n < context->pt[m].fds_count; n++) {
struct lws *wsi = wsi_from_fd(context, pt->fds[n].fd);
if (!wsi)
continue;
if (wsi->vhost != vh)
continue;
lws_close_free_wsi(wsi,
LWS_CLOSE_STATUS_NOSTATUS_CONTEXT_DESTROY
/* no protocol close */);
n--;
}
}
/*
* destroy any pending timed events
*/
while (vh->timed_vh_protocol_list)
lws_timed_callback_remove(vh, vh->timed_vh_protocol_list);
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/*
* let the protocols destroy the per-vhost protocol objects
*/
memset(&wsi, 0, sizeof(wsi));
wsi.context = vh->context;
wsi.vhost = vh;
protocol = vh->protocols;
if (protocol) {
n = 0;
while (n < vh->count_protocols) {
wsi.protocol = protocol;
protocol->callback(&wsi, LWS_CALLBACK_PROTOCOL_DESTROY,
NULL, NULL, 0);
protocol++;
n++;
}
}
/*
* remove vhost from context list of vhosts
*/
lws_start_foreach_llp(struct lws_vhost **, pv, context->vhost_list) {
if (*pv == vh) {
*pv = vh->vhost_next;
break;
}
} lws_end_foreach_llp(pv, vhost_next);
/* add ourselves to the pending destruction list */
vh->vhost_next = vh->context->vhost_pending_destruction_list;
vh->context->vhost_pending_destruction_list = vh;
}
static void
lws_vhost_destroy2(struct lws_vhost *vh)
{
const struct lws_protocols *protocol = NULL;
struct lws_context *context = vh->context;
struct lws_deferred_free *df;
int n;
lwsl_info("%s: %p\n", __func__, vh);
/* if we are still on deferred free list, remove ourselves */
lws_start_foreach_llp(struct lws_deferred_free **, pdf,
context->deferred_free_list) {
if ((*pdf)->payload == vh) {
df = *pdf;
*pdf = df->next;
lws_free(df);
break;
}
} lws_end_foreach_llp(pdf, next);
/* remove ourselves from the pending destruction list */
lws_start_foreach_llp(struct lws_vhost **, pv,
context->vhost_pending_destruction_list) {
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if ((*pv) == vh) {
*pv = (*pv)->vhost_next;
break;
}
} lws_end_foreach_llp(pv, vhost_next);
/*
* Free all the allocations associated with the vhost
*/
protocol = vh->protocols;
if (protocol) {
n = 0;
while (n < vh->count_protocols) {
if (vh->protocol_vh_privs &&
vh->protocol_vh_privs[n]) {
lws_free(vh->protocol_vh_privs[n]);
vh->protocol_vh_privs[n] = NULL;
}
protocol++;
n++;
}
}
if (vh->protocol_vh_privs)
lws_free(vh->protocol_vh_privs);
lws_ssl_SSL_CTX_destroy(vh);
lws_free(vh->same_vh_protocol_list);
#ifdef LWS_WITH_PLUGINS
if (LWS_LIBUV_ENABLED(context)) {
if (context->plugin_list)
lws_free((void *)vh->protocols);
} else
#endif
{
if (context->options & LWS_SERVER_OPTION_EXPLICIT_VHOSTS)
lws_free((void *)vh->protocols);
}
#ifdef LWS_WITH_PLUGINS
#ifndef LWS_NO_EXTENSIONS
if (context->plugin_extension_count)
lws_free((void *)vh->extensions);
#endif
#endif
#ifdef LWS_WITH_ACCESS_LOG
if (vh->log_fd != (int)LWS_INVALID_FILE)
close(vh->log_fd);
#endif
lws_free_set_NULL(vh->alloc_cert_path);
/*
* although async event callbacks may still come for wsi handles with
* pending close in the case of asycn event library like libuv,
* they do not refer to the vhost. So it's safe to free.
*/
lwsl_info(" %s: Freeing vhost %p\n", __func__, vh);
}
int
lws_check_deferred_free(struct lws_context *context, int force)
{
struct lws_deferred_free *df;
time_t now = lws_now_secs();
lws_start_foreach_llp(struct lws_deferred_free **, pdf,
context->deferred_free_list) {
if (force ||
lws_compare_time_t(context, now, (*pdf)->deadline) > 5) {
df = *pdf;
*pdf = df->next;
/* finalize vh destruction */
lws_vhost_destroy2(df->payload);
lws_free(df);
continue; /* after deletion we already point to next */
}
} lws_end_foreach_llp(pdf, next);
return 0;
}
LWS_VISIBLE void
lws_vhost_destroy(struct lws_vhost *vh)
{
struct lws_deferred_free *df = lws_malloc(sizeof(*df), "deferred free");
if (!df)
return;
lws_vhost_destroy1(vh);
/* part 2 is deferred to allow all the handle closes to complete */
df->next = vh->context->deferred_free_list;
df->deadline = lws_now_secs();
df->payload = vh;
vh->context->deferred_free_list = df;
}
lws_context_destroy(struct lws_context *context)
volatile struct lws_foreign_thread_pollfd *ftp, *next;
volatile struct lws_context_per_thread *vpt;
int n, m;
if (!context) {
lwsl_notice("%s: ctx %p\n", __func__, context);
return;
}
if (context->being_destroyed1) {
lwsl_notice("%s: ctx %p: already being destroyed\n",
__func__, context);
lwsl_info("%s: ctx %p\n", __func__, context);
m = context->count_threads;
context->being_destroyed = 1;
memset(&wsi, 0, sizeof(wsi));
wsi.context = context;
#ifdef LWS_LATENCY
if (context->worst_latency_info[0])
lwsl_notice("Worst latency: %s\n", context->worst_latency_info);
#endif
vpt = (volatile struct lws_context_per_thread *)pt;
ftp = vpt->foreign_pfd_list;
while (ftp) {
next = ftp->next;
lws_free((void *)ftp);
ftp = next;
}
vpt->foreign_pfd_list = NULL;
for (n = 0; (unsigned int)n < context->pt[m].fds_count; n++) {
if (wsi->event_pipe) {
lws_plat_pipe_close(wsi);
remove_wsi_socket_from_fds(wsi);
lws_free(wsi);
context->count_wsi_allocated--;
} else
lws_close_free_wsi(wsi,
LWS_CLOSE_STATUS_NOSTATUS_CONTEXT_DESTROY
/* no protocol close */);
lws_pt_mutex_destroy(pt);
/*
* give all extensions a chance to clean up any per-context
* allocations they might have made
*/
/*
* inform all the protocols that they are done and will have no more
* callbacks.
*
* We can't free things until after the event loop shuts down.
if (context->protocol_init_done)
vh = context->vhost_list;
struct lws_vhost *vhn = vh->vhost_next;
pt = &context->pt[n];
lws_libev_destroyloop(context, n);
lws_libuv_destroyloop(context, n);
lws_libevent_destroyloop(context, n);
while (pt->ah_list)
_lws_destroy_ah(pt, pt->ah_list);
lws_plat_context_early_destroy(context);
if (!LWS_LIBUV_ENABLED(context))
lws_context_destroy2(context);
}
/*
* call the second one after the event loop has been shut down cleanly
*/
LWS_VISIBLE void
lws_context_destroy2(struct lws_context *context)
{
struct lws_vhost *vh = NULL, *vh1;
#if defined(LWS_WITH_PEER_LIMITS)
uint32_t n;
#endif
lwsl_info("%s: ctx %p\n", __func__, context);
/*
* free all the per-vhost allocations
*/
vh = context->vhost_list;
while (vh) {
vh1 = vh->vhost_next;
/* remove ourselves from the pending destruction list */
while (context->vhost_pending_destruction_list)
/* removes itself from list */
lws_vhost_destroy2(context->vhost_pending_destruction_list);
lws_plat_context_late_destroy(context);
#if defined(LWS_WITH_PEER_LIMITS)
for (n = 0; n < context->pl_hash_elements; n++) {
lws_start_foreach_llp(struct lws_peer **, peer,
context->pl_hash_table[n]) {
struct lws_peer *df = *peer;
*peer = df->next;
lws_free(df);
continue;
} lws_end_foreach_llp(peer, next);
}
lws_free(context->pl_hash_table);
#endif
if (context->external_baggage_free_on_destroy)
free(context->external_baggage_free_on_destroy);
pthread_mutex_destroy(&context->lock);