void
lws_libuv_io(struct lws *wsi, int flags)
{
struct lws_context *context = lws_get_context(wsi);
struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
struct lws_io_watcher *w = &wsi->w_read;
//#if defined(WIN32) || defined(_WIN32)
// int current_events = w->uv_watcher.events &
// (UV_READABLE | UV_WRITABLE);
//#else
int current_events = w->actual_events & (UV_READABLE | UV_WRITABLE);
//#endif
if (!LWS_LIBUV_ENABLED(context))
return;
// w->context is set after the loop is initialized
if (!pt->io_loop_uv || !w->context) {
lwsl_info("%s: no io loop yet\n", __func__);
return;
}
if (!((flags & (LWS_EV_START | LWS_EV_STOP)) &&
(flags & (LWS_EV_READ | LWS_EV_WRITE)))) {
lwsl_err("%s: assert: flags %d", __func__, flags);
assert(0);
}
if (flags & LWS_EV_START) {
if (flags & LWS_EV_WRITE)
current_events |= UV_WRITABLE;
if (flags & LWS_EV_READ)
current_events |= UV_READABLE;
uv_poll_start(&w->uv_watcher, current_events, lws_io_cb);
} else {
if (flags & LWS_EV_WRITE)
current_events &= ~UV_WRITABLE;
if (flags & LWS_EV_READ)
current_events &= ~UV_READABLE;
if (!(current_events & (UV_READABLE | UV_WRITABLE)))
uv_poll_stop(&w->uv_watcher);
else
uv_poll_start(&w->uv_watcher, current_events,
lws_io_cb);
}
w->actual_events = current_events;
}
void lws_set_protocol_write_pending(struct libwebsocket_context *context,
struct libwebsocket *wsi,
enum lws_pending_protocol_send pend)
{
lwsl_info("setting pps %d\n", pend);
if (wsi->pps)
lwsl_err("pps overwrite\n");
wsi->pps = pend;
libwebsocket_rx_flow_control(wsi, 0);
libwebsocket_callback_on_writable(context, wsi);
}
static void
elops_io_uv(struct lws *wsi, int flags)
{
struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
struct lws_io_watcher *w = &wsi->w_read;
int current_events = w->actual_events & (UV_READABLE | UV_WRITABLE);
lwsl_debug("%s: %p: %d\n", __func__, wsi, flags);
/* w->context is set after the loop is initialized */
if (!pt->uv.io_loop || !w->context) {
lwsl_info("%s: no io loop yet\n", __func__);
return;
}
if (!((flags & (LWS_EV_START | LWS_EV_STOP)) &&
(flags & (LWS_EV_READ | LWS_EV_WRITE)))) {
lwsl_err("%s: assert: flags %d", __func__, flags);
assert(0);
}
if (!w->uv.pwatcher || wsi->told_event_loop_closed) {
lwsl_err("%s: no watcher\n", __func__);
return;
}
if (flags & LWS_EV_START) {
if (flags & LWS_EV_WRITE)
current_events |= UV_WRITABLE;
if (flags & LWS_EV_READ)
current_events |= UV_READABLE;
uv_poll_start(w->uv.pwatcher, current_events, lws_io_cb);
} else {
if (flags & LWS_EV_WRITE)
current_events &= ~UV_WRITABLE;
if (flags & LWS_EV_READ)
current_events &= ~UV_READABLE;
if (!(current_events & (UV_READABLE | UV_WRITABLE)))
uv_poll_stop(w->uv.pwatcher);
else
uv_poll_start(w->uv.pwatcher, current_events,
lws_io_cb);
}
w->actual_events = current_events;
}
void
lws_libuv_io(struct lws *wsi, int flags)
{
struct lws_context *context = lws_get_context(wsi);
struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
#if defined(WIN32) || defined(_WIN32)
int current_events = wsi->w_read.uv_watcher.events &
(UV_READABLE | UV_WRITABLE);
#else
int current_events = wsi->w_read.uv_watcher.io_watcher.pevents &
(UV_READABLE | UV_WRITABLE);
#endif
struct lws_io_watcher *w = &wsi->w_read;
if (!LWS_LIBUV_ENABLED(context))
return;
// lwsl_notice("%s: wsi: %p, flags:0x%x\n", __func__, wsi, flags);
if (!pt->io_loop_uv) {
lwsl_info("%s: no io loop yet\n", __func__);
return;
}
if (!((flags & (LWS_EV_START | LWS_EV_STOP)) &&
(flags & (LWS_EV_READ | LWS_EV_WRITE)))) {
lwsl_err("%s: assert: flags %d", __func__, flags);
assert(0);
}
if (flags & LWS_EV_START) {
if (flags & LWS_EV_WRITE)
current_events |= UV_WRITABLE;
if (flags & LWS_EV_READ)
current_events |= UV_READABLE;
uv_poll_start(&w->uv_watcher, current_events, lws_io_cb);
} else {
if (flags & LWS_EV_WRITE)
current_events &= ~UV_WRITABLE;
if (flags & LWS_EV_READ)
current_events &= ~UV_READABLE;
if (!(current_events & (UV_READABLE | UV_WRITABLE)))
uv_poll_stop(&w->uv_watcher);
else
uv_poll_start(&w->uv_watcher, current_events,
lws_io_cb);
}
}
int LWS_WARN_UNUSED_RESULT
lws_http_transaction_completed_client(struct lws *wsi)
{
lwsl_debug("%s: wsi %p\n", __func__, wsi);
/* if we can't go back to accept new headers, drop the connection */
if (wsi->u.http.connection_type != HTTP_CONNECTION_KEEP_ALIVE) {
lwsl_info("%s: %p: close connection\n", __func__, wsi);
return 1;
}
/* we don't support chained client connections yet */
return 1;
#if 0
/* otherwise set ourselves up ready to go again */
wsi->state = LWSS_CLIENT_HTTP_ESTABLISHED;
wsi->mode = LWSCM_HTTP_CLIENT_ACCEPTED;
wsi->u.http.content_length = 0;
wsi->hdr_parsing_completed = 0;
/* He asked for it to stay alive indefinitely */
lws_set_timeout(wsi, NO_PENDING_TIMEOUT, 0);
/*
* As client, nothing new is going to come until we ask for it
* we can drop the ah, if any
*/
if (wsi->u.hdr.ah) {
lws_header_table_force_to_detachable_state(wsi);
lws_header_table_detach(wsi, 0);
}
/* If we're (re)starting on headers, need other implied init */
wsi->u.hdr.ues = URIES_IDLE;
lwsl_info("%s: %p: keep-alive await new transaction\n", __func__, wsi);
return 0;
#endif
}
int
libwebsocket_ensure_user_space(struct libwebsocket *wsi)
{
lwsl_info("%s: %p protocol %p\n", __func__, wsi, wsi->protocol);
if (!wsi->protocol)
return 1;
/* allocate the per-connection user memory (if any) */
if (wsi->protocol->per_session_data_size && !wsi->user_space) {
wsi->user_space = malloc(
wsi->protocol->per_session_data_size);
if (wsi->user_space == NULL) {
lwsl_err("Out of memory for conn user space\n");
return 1;
}
memset(wsi->user_space, 0,
wsi->protocol->per_session_data_size);
} else
lwsl_info("%s: %p protocol pss %u, user_space=%d\n", __func__, wsi, wsi->protocol->per_session_data_size, wsi->user_space);
return 0;
}
static int
lws_gate_accepts(struct lws_context *context, int on)
{
struct lws_vhost *v = context->vhost_list;
lwsl_info("gating accepts %d\n", on);
context->ssl_gate_accepts = !on;
#if defined(LWS_WITH_STATS)
context->updated = 1;
#endif
while (v) {
if (v->use_ssl && v->lserv_wsi) /* gate ability to accept incoming connections */
if (lws_change_pollfd(v->lserv_wsi, (LWS_POLLIN) * !on,
(LWS_POLLIN) * on))
lwsl_info("Unable to set accept POLLIN %d\n", on);
v = v->vhost_next;
}
return 0;
}
static struct lws_urldecode_stateful *
lws_urldecode_s_create(struct lws *wsi, char *out, int out_len, void *data,
lws_urldecode_stateful_cb output)
{
struct lws_urldecode_stateful *s = lws_zalloc(sizeof(*s),
"stateful urldecode");
char buf[200], *p;
int m = 0;
if (!s)
return NULL;
s->out = out;
s->out_len = out_len;
s->output = output;
s->pos = 0;
s->sum = 0;
s->mp = 0;
s->state = US_NAME;
s->name[0] = '\0';
s->data = data;
s->wsi = wsi;
if (lws_hdr_copy(wsi, buf, sizeof(buf),
WSI_TOKEN_HTTP_CONTENT_TYPE) > 0) {
/* multipart/form-data; boundary=----WebKitFormBoundarycc7YgAPEIHvgE9Bf */
if (!strncmp(buf, "multipart/form-data", 19)) {
s->multipart_form_data = 1;
s->state = MT_LOOK_BOUND_IN;
s->mp = 2;
p = strstr(buf, "boundary=");
if (p) {
p += 9;
s->mime_boundary[m++] = '\x0d';
s->mime_boundary[m++] = '\x0a';
s->mime_boundary[m++] = '-';
s->mime_boundary[m++] = '-';
while (m < (int)sizeof(s->mime_boundary) - 1 &&
*p && *p != ' ')
s->mime_boundary[m++] = *p++;
s->mime_boundary[m] = '\0';
lwsl_info("boundary '%s'\n", s->mime_boundary);
}
}
}
return s;
}
static void
lws_uv_close_cb_sa(uv_handle_t *handle)
{
struct lws_context *context =
LWS_UV_REFCOUNT_STATIC_HANDLE_TO_CONTEXT(handle);
int n;
lwsl_info("%s: sa left %d: dyn left: %d\n", __func__,
context->count_event_loop_static_asset_handles,
context->count_wsi_allocated);
/* any static assets left? */
if (LWS_UV_REFCOUNT_STATIC_HANDLE_DESTROYED(handle) ||
context->count_wsi_allocated)
return;
/*
* That's it... all wsi were down, and now every
* static asset lws had a UV handle for is down.
*
* Stop the loop so we can get out of here.
*/
for (n = 0; n < context->count_threads; n++) {
struct lws_context_per_thread *pt = &context->pt[n];
if (pt->uv.io_loop && !pt->event_loop_foreign)
uv_stop(pt->uv.io_loop);
}
if (!context->pt[0].event_loop_foreign) {
lwsl_info("%s: calling lws_context_destroy2\n", __func__);
lws_context_destroy2(context);
}
lwsl_info("%s: all done\n", __func__);
}
static int ws_def_callback(struct libwebsocket_context *context,
struct libwebsocket *wsi,
enum libwebsocket_callback_reasons reason, void *user,
void *in, size_t len)
{
switch (reason) {
case LWS_CALLBACK_CLIENT_ESTABLISHED:
lwsl_info("dumb: LWS_CALLBACK_CLIENT_ESTABLISHED\n");
break;
case LWS_CALLBACK_CLOSED:
lwsl_notice("dumb: LWS_CALLBACK_CLOSED\n");
wsi_cl = NULL;force_exit=1;
break;
case LWS_CALLBACK_CLIENT_RECEIVE:
((char *)in)[len] = '\0';
lwsl_info("rx %d '%s'\n", (int)len, (char *)in);
break;
/* because we are protocols[0] ... */
case LWS_CALLBACK_CLIENT_CONNECTION_ERROR:
if (wsi == wsi_cl) {
lwsl_err("dumb: LWS_CALLBACK_CLIENT_CONNECTION_ERROR\n");
wsi_cl = NULL;
}
break;
default:
break;
}
return 0;
}
void
lws_ssl_elaborate_error(void)
{
#if defined(LWS_WITH_MBEDTLS)
#else
char buf[256];
u_long err;
while ((err = ERR_get_error()) != 0) {
ERR_error_string_n(err, buf, sizeof(buf));
lwsl_info("*** %s\n", buf);
}
#endif
}
static int
esp8266_find_free_conn(struct lws_context *context)
{
int n;
for (n = 0; n < context->max_fds; n++)
if (!context->connpool[n]) {
lwsl_info(" using connpool %d\n", n);
return n;
}
lwsl_err("%s: no free conns\n", __func__);
return -1;
}
int
_libwebsocket_rx_flow_control(struct libwebsocket *wsi)
{
struct libwebsocket_context *context = wsi->protocol->owning_server;
/* there is no pending change */
if (!(wsi->rxflow_change_to & LWS_RXFLOW_PENDING_CHANGE))
return 0;
/* stuff is still buffered, not ready to really accept new input */
if (wsi->rxflow_buffer) {
/* get ourselves called back to deal with stashed buffer */
libwebsocket_callback_on_writable(context, wsi);
return 0;
}
/* pending is cleared, we can change rxflow state */
wsi->rxflow_change_to &= ~LWS_RXFLOW_PENDING_CHANGE;
lwsl_info("rxflow: wsi %p change_to %d\n", wsi,
wsi->rxflow_change_to & LWS_RXFLOW_ALLOW);
/* adjust the pollfd for this wsi */
if (wsi->rxflow_change_to & LWS_RXFLOW_ALLOW) {
if (lws_change_pollfd(wsi, 0, LWS_POLLIN)) {
lwsl_info("%s: fail\n", __func__);
return -1;
}
} else
if (lws_change_pollfd(wsi, LWS_POLLIN, 0))
return -1;
return 0;
}
/*
* This does not actually stop the event loop. The reason is we have to pass
* libuv handle closures through its event loop. So this tries to close all
* wsi, and set a flag; when all the wsi closures are finalized then we
* actually stop the libuv event loops.
*/
static void
lws_libuv_stop(struct lws_context *context)
{
struct lws_context_per_thread *pt;
int n, m;
lwsl_err("%s\n", __func__);
if (context->requested_kill) {
lwsl_err("%s: ignoring\n", __func__);
return;
}
context->requested_kill = 1;
m = context->count_threads;
context->being_destroyed = 1;
/*
* Phase 1: start the close of every dynamic uv handle
*/
while (m--) {
pt = &context->pt[m];
if (pt->pipe_wsi) {
uv_poll_stop(pt->pipe_wsi->w_read.uv.pwatcher);
lws_destroy_event_pipe(pt->pipe_wsi);
pt->pipe_wsi = NULL;
}
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;
lws_close_free_wsi(wsi,
LWS_CLOSE_STATUS_NOSTATUS_CONTEXT_DESTROY,
__func__ /* no protocol close */);
n--;
}
}
lwsl_info("%s: started closing all wsi\n", __func__);
/* we cannot have completed... there are at least the cancel pipes */
}
struct lws *
lws_create_server_child_wsi(struct lws_vhost *vhost, struct lws *parent_wsi,
unsigned int sid)
{
struct lws *wsi = lws_create_new_server_wsi(vhost);
if (!wsi)
return NULL;
/* no more children allowed by parent */
if (parent_wsi->u.http2.child_count + 1 ==
parent_wsi->u.http2.peer_settings.setting[
LWS_HTTP2_SETTINGS__MAX_CONCURRENT_STREAMS])
goto bail;
lws_http2_init(&wsi->u.http2.peer_settings);
lws_http2_init(&wsi->u.http2.my_settings);
wsi->u.http2.stream_id = sid;
wsi->u.http2.my_stream_id = sid;
wsi->u.http2.parent_wsi = parent_wsi;
wsi->u.http2.next_child_wsi = parent_wsi->u.http2.next_child_wsi;
parent_wsi->u.http2.next_child_wsi = wsi;
parent_wsi->u.http2.child_count++;
wsi->u.http2.my_priority = 16;
wsi->u.http2.tx_credit = 65535;
wsi->state = LWSS_HTTP2_ESTABLISHED;
wsi->mode = parent_wsi->mode;
wsi->protocol = &vhost->protocols[0];
if (lws_ensure_user_space(wsi))
goto bail;
lwsl_info("%s: %p new child %p, sid %d, user_space=%p\n", __func__,
parent_wsi, wsi, sid, wsi->user_space);
return wsi;
bail:
vhost->protocols[0].callback(wsi, LWS_CALLBACK_WSI_DESTROY,
NULL, NULL, 0);
lws_free(wsi);
return NULL;
}
int
insert_wsi_socket_into_fds(struct libwebsocket_context *context,
struct libwebsocket *wsi)
{
struct libwebsocket_pollargs pa = { wsi->sock, LWS_POLLIN, 0 };
if (context->fds_count >= context->max_fds) {
lwsl_err("Too many fds (%d)\n", context->max_fds);
return 1;
}
if (wsi->sock >= context->max_fds) {
lwsl_err("Socket fd %d is too high (%d)\n",
wsi->sock, context->max_fds);
return 1;
}
assert(wsi);
assert(wsi->sock >= 0);
lwsl_info("insert_wsi_socket_into_fds: wsi=%p, sock=%d, fds pos=%d\n",
wsi, wsi->sock, context->fds_count);
context->protocols[0].callback(context, wsi,
LWS_CALLBACK_LOCK_POLL,
wsi->user_space, (void *) &pa, 0);
context->lws_lookup[wsi->sock] = wsi;
wsi->position_in_fds_table = context->fds_count;
context->fds[context->fds_count].fd = wsi->sock;
context->fds[context->fds_count].events = LWS_POLLIN;
lws_plat_insert_socket_into_fds(context, wsi);
/* external POLL support via protocol 0 */
context->protocols[0].callback(context, wsi,
LWS_CALLBACK_ADD_POLL_FD,
wsi->user_space, (void *) &pa, 0);
context->protocols[0].callback(context, wsi,
LWS_CALLBACK_UNLOCK_POLL,
wsi->user_space, (void *)&pa, 0);
return 0;
}
static int
lws_ssl_server_name_cb(SSL *ssl, int *ad, void *arg)
{
struct lws_context *context;
struct lws_vhost *vhost, *vh;
const char *servername;
int port;
if (!ssl)
return SSL_TLSEXT_ERR_NOACK;
context = (struct lws_context *)SSL_CTX_get_ex_data(
SSL_get_SSL_CTX(ssl),
openssl_SSL_CTX_private_data_index);
/*
* We can only get ssl accepted connections by using a vhost's ssl_ctx
* find out which listening one took us and only match vhosts on the
* same port.
*/
vh = context->vhost_list;
while (vh) {
if (vh->ssl_ctx == SSL_get_SSL_CTX(ssl))
break;
vh = vh->vhost_next;
}
assert(vh); /* we cannot get an ssl without using a vhost ssl_ctx */
port = vh->listen_port;
servername = SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name);
if (servername) {
vhost = lws_select_vhost(context, port, servername);
if (vhost) {
lwsl_info("SNI: Found: %s\n", servername);
SSL_set_SSL_CTX(ssl, vhost->ssl_ctx);
return SSL_TLSEXT_ERR_OK;
}
lwsl_err("SNI: Unknown ServerName: %s\n", servername);
}
return SSL_TLSEXT_ERR_OK;
}
void
lws_libuv_io(struct lws *wsi, int flags)
{
struct lws_context *context = lws_get_context(wsi);
struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
int current_events = wsi->w_read.uv_watcher.io_watcher.pevents &
(UV_READABLE | UV_WRITABLE);
struct lws_io_watcher *w = &wsi->w_read;
if (!LWS_LIBUV_ENABLED(context))
return;
lwsl_debug("%s: wsi: %p, flags:%d\n", __func__, wsi, flags);
if (!pt->io_loop_uv) {
lwsl_info("%s: no io loop yet\n", __func__);
return;
}
assert((flags & (LWS_EV_START | LWS_EV_STOP)) &&
(flags & (LWS_EV_READ | LWS_EV_WRITE)));
if (flags & LWS_EV_START) {
if (flags & LWS_EV_WRITE)
current_events |= UV_WRITABLE;
if (flags & LWS_EV_READ)
current_events |= UV_READABLE;
uv_poll_start(&w->uv_watcher, current_events, lws_accept_cb);
} else {
if (flags & LWS_EV_WRITE)
current_events &= ~UV_WRITABLE;
if (flags & LWS_EV_READ)
current_events &= ~UV_READABLE;
if (!(current_events & (UV_READABLE | UV_WRITABLE)))
uv_poll_stop(&w->uv_watcher);
else
uv_poll_start(&w->uv_watcher, current_events,
lws_accept_cb);
}
}
int
lws_tls_client_confirm_peer_cert(struct lws *wsi, char *ebuf, int ebuf_len)
{
int n;
X509 *peer = SSL_get_peer_certificate(wsi->tls.ssl);
struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
char *sb = (char *)&pt->serv_buf[0];
if (!peer) {
lwsl_info("peer did not provide cert\n");
return -1;
}
lwsl_info("peer provided cert\n");
n = SSL_get_verify_result(wsi->tls.ssl);
lws_latency(wsi->context, wsi,
"SSL_get_verify_result LWS_CONNMODE..HANDSHAKE", n, n > 0);
lwsl_debug("get_verify says %d\n", n);
if (n == X509_V_OK)
return 0;
if (n == X509_V_ERR_HOSTNAME_MISMATCH &&
(wsi->tls.use_ssl & LCCSCF_SKIP_SERVER_CERT_HOSTNAME_CHECK)) {
lwsl_info("accepting certificate for invalid hostname\n");
return 0;
}
if (n == X509_V_ERR_INVALID_CA &&
(wsi->tls.use_ssl & LCCSCF_ALLOW_SELFSIGNED)) {
lwsl_info("accepting certificate from untrusted CA\n");
return 0;
}
if ((n == X509_V_ERR_CERT_NOT_YET_VALID ||
n == X509_V_ERR_CERT_HAS_EXPIRED) &&
(wsi->tls.use_ssl & LCCSCF_ALLOW_EXPIRED)) {
lwsl_info("accepting expired or not yet valid certificate\n");
return 0;
}
lws_snprintf(ebuf, ebuf_len,
"server's cert didn't look good, X509_V_ERR = %d: %s\n",
n, ERR_error_string(n, sb));
lwsl_info("%s\n", ebuf);
lws_ssl_elaborate_error();
return -1;
}
int lws_add_http_header_content_length(struct lws *wsi,
lws_filepos_t content_length,
unsigned char **p, unsigned char *end)
{
char b[24];
int n;
n = sprintf(b, "%llu", (unsigned long long)content_length);
if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_CONTENT_LENGTH,
(unsigned char *)b, n, p, end))
return 1;
wsi->http.tx_content_length = content_length;
wsi->http.tx_content_remain = content_length;
lwsl_info("%s: wsi %p: tx_content_length/remain %llu\n", __func__,
wsi, (unsigned long long)content_length);
return 0;
}
static void
elops_destroy_pt_uv(struct lws_context *context, int tsi)
{
struct lws_context_per_thread *pt = &context->pt[tsi];
int m, ns;
lwsl_info("%s: %d\n", __func__, tsi);
if (!lws_check_opt(context->options, LWS_SERVER_OPTION_LIBUV))
return;
if (!pt->uv.io_loop)
return;
if (pt->event_loop_destroy_processing_done)
return;
pt->event_loop_destroy_processing_done = 1;
if (!pt->event_loop_foreign) {
uv_signal_stop(&pt->w_sigint.uv.watcher);
ns = LWS_ARRAY_SIZE(sigs);
if (lws_check_opt(context->options,
LWS_SERVER_OPTION_UV_NO_SIGSEGV_SIGFPE_SPIN))
ns = 2;
for (m = 0; m < ns; m++) {
uv_signal_stop(&pt->uv.signals[m]);
uv_close((uv_handle_t *)&pt->uv.signals[m],
lws_uv_close_cb_sa);
}
} else
lwsl_debug("%s: not closing pt signals\n", __func__);
uv_timer_stop(&pt->uv.timeout_watcher);
uv_close((uv_handle_t *)&pt->uv.timeout_watcher, lws_uv_close_cb_sa);
uv_timer_stop(&pt->uv.hrtimer);
uv_close((uv_handle_t *)&pt->uv.hrtimer, lws_uv_close_cb_sa);
uv_idle_stop(&pt->uv.idle);
uv_close((uv_handle_t *)&pt->uv.idle, lws_uv_close_cb_sa);
}
int
lws_context_init_ssl_library(struct lws_context_creation_info *info)
{
#ifdef USE_WOLFSSL
#ifdef USE_OLD_CYASSL
lwsl_info(" Compiled with CyaSSL support\n");
#else
lwsl_info(" Compiled with wolfSSL support\n");
#endif
#else
#if defined(LWS_WITH_BORINGSSL)
lwsl_info(" Compiled with BoringSSL support\n");
#else
#if defined(LWS_WITH_MBEDTLS)
lwsl_info(" Compiled with MbedTLS support\n");
#else
lwsl_info(" Compiled with OpenSSL support\n");
#endif
#endif
#endif
if (!lws_check_opt(info->options, LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT)) {
lwsl_info(" SSL disabled: no LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT\n");
return 0;
}
/* basic openssl init */
lwsl_info("Doing SSL library init\n");
#if !defined(LWS_WITH_MBEDTLS)
SSL_library_init();
OpenSSL_add_all_algorithms();
SSL_load_error_strings();
openssl_websocket_private_data_index =
SSL_get_ex_new_index(0, "lws", NULL, NULL, NULL);
openssl_SSL_CTX_private_data_index = SSL_CTX_get_ex_new_index(0,
NULL, NULL, NULL, NULL);
#endif
return 0;
}
static void
esp8266_cb_disconnected(void *arg)
{
struct espconn *conn = arg;
struct lws *wsi = conn->reverse;
int n;
lwsl_notice("%s: %p\n", __func__, wsi);
for (n = 0; n < hacky_context->max_fds; n++)
if (hacky_context->connpool[n] == arg) {
hacky_context->connpool[n] = NULL;
lwsl_info(" freed connpool %d\n", n);
}
if (wsi) {
conn->reverse = NULL;
lws_close_free_wsi(wsi, LWS_CLOSE_STATUS_NOSTATUS);
lwsl_notice("closed ok\n");
}
}
static int
lws_calllback_as_writeable(struct libwebsocket_context *context,
struct libwebsocket *wsi)
{
int n;
switch (wsi->mode) {
case LWS_CONNMODE_WS_CLIENT:
n = LWS_CALLBACK_CLIENT_WRITEABLE;
break;
case LWS_CONNMODE_WS_SERVING:
n = LWS_CALLBACK_SERVER_WRITEABLE;
break;
default:
n = LWS_CALLBACK_HTTP_WRITEABLE;
break;
}
lwsl_info("%s: %p (user=%p)\n", __func__, wsi, wsi->user_space);
return user_callback_handle_rxflow(wsi->protocol->callback, context,
wsi, (enum libwebsocket_callback_reasons) n,
wsi->user_space, NULL, 0);
}
struct lws *
lws_create_server_child_wsi(struct lws_context *context, struct lws *parent_wsi,
unsigned int sid)
{
struct lws *wsi = lws_create_new_server_wsi(context);
if (!wsi)
return NULL;
/* no more children allowed by parent */
if (parent_wsi->u.http2.child_count + 1 ==
parent_wsi->u.http2.peer_settings.setting[
LWS_HTTP2_SETTINGS__MAX_CONCURRENT_STREAMS])
return NULL;
lws_http2_init(&wsi->u.http2.peer_settings);
lws_http2_init(&wsi->u.http2.my_settings);
wsi->u.http2.stream_id = sid;
wsi->u.http2.my_stream_id = sid;
wsi->u.http2.parent_wsi = parent_wsi;
wsi->u.http2.next_child_wsi = parent_wsi->u.http2.next_child_wsi;
parent_wsi->u.http2.next_child_wsi = wsi;
parent_wsi->u.http2.child_count++;
wsi->u.http2.my_priority = 16;
wsi->u.http2.tx_credit = 65535;
wsi->state = WSI_STATE_HTTP2_ESTABLISHED;
wsi->mode = parent_wsi->mode;
wsi->protocol = &context->protocols[0];
lws_ensure_user_space(wsi);
lwsl_info("%s: %p new child %p, sid %d, user_space=%p\n", __func__,
parent_wsi, wsi, sid, wsi->user_space);
return wsi;
}
void
lws_context_init_alpn(struct lws_vhost *vhost)
{
#if defined(LWS_WITH_MBEDTLS) || (defined(OPENSSL_VERSION_NUMBER) && \
OPENSSL_VERSION_NUMBER >= 0x10002000L)
const char *alpn_comma = vhost->context->tls.alpn_default;
if (vhost->tls.alpn)
alpn_comma = vhost->tls.alpn;
lwsl_info(" Server '%s' advertising ALPN: %s\n",
vhost->name, alpn_comma);
vhost->tls.alpn_ctx.len = lws_alpn_comma_to_openssl(alpn_comma,
vhost->tls.alpn_ctx.data,
sizeof(vhost->tls.alpn_ctx.data) - 1);
SSL_CTX_set_alpn_select_cb(vhost->tls.ssl_ctx, alpn_cb, &vhost->tls.alpn_ctx);
#else
lwsl_err(
" HTTP2 / ALPN configured but not supported by OpenSSL 0x%lx\n",
OPENSSL_VERSION_NUMBER);
#endif // OPENSSL_VERSION_NUMBER >= 0x10002000L
}
static int
stream_close(struct lws *wsi)
{
char buf[LWS_PRE + 6], *out = buf + LWS_PRE;
if (wsi->http.did_stream_close)
return 0;
wsi->http.did_stream_close = 1;
if (wsi->http2_substream) {
if (lws_write(wsi, (unsigned char *)buf + LWS_PRE, 0,
LWS_WRITE_HTTP_FINAL) < 0) {
lwsl_info("%s: COMPL_CLIENT_HTTP: h2 fin wr failed\n",
__func__);
return -1;
}
} else {
*out++ = '0';
*out++ = '\x0d';
*out++ = '\x0a';
*out++ = '\x0d';
*out++ = '\x0a';
if (lws_write(wsi, (unsigned char *)buf + LWS_PRE, 5,
LWS_WRITE_HTTP_FINAL) < 0) {
lwsl_err("%s: COMPL_CLIENT_HTTP: "
"h2 final write failed\n", __func__);
return -1;
}
}
return 0;
}
int lws_http2_frame_write(struct lws *wsi, int type, int flags,
unsigned int sid, unsigned int len, unsigned char *buf)
{
struct lws *wsi_eff = lws_http2_get_network_wsi(wsi);
unsigned char *p = &buf[-LWS_HTTP2_FRAME_HEADER_LENGTH];
int n;
*p++ = len >> 16;
*p++ = len >> 8;
*p++ = len;
*p++ = type;
*p++ = flags;
*p++ = sid >> 24;
*p++ = sid >> 16;
*p++ = sid >> 8;
*p++ = sid;
lwsl_info("%s: %p (eff %p). type %d, flags 0x%x, sid=%d, len=%d\n",
__func__, wsi, wsi_eff, type, flags, sid, len,
wsi->u.http2.tx_credit);
if (type == LWS_HTTP2_FRAME_TYPE_DATA) {
if (wsi->u.http2.tx_credit < len)
lwsl_err("%s: %p: sending payload len %d"
" but tx_credit only %d!\n", len,
wsi->u.http2.tx_credit);
wsi->u.http2.tx_credit -= len;
}
n = lws_issue_raw(wsi_eff, &buf[-LWS_HTTP2_FRAME_HEADER_LENGTH],
len + LWS_HTTP2_FRAME_HEADER_LENGTH);
if (n >= LWS_HTTP2_FRAME_HEADER_LENGTH)
return n - LWS_HTTP2_FRAME_HEADER_LENGTH;
return n;
}
static int
lwsws_get_config(void *user, const char *f, const char * const *paths,
int count_paths, lejp_callback cb)
{
unsigned char buf[128];
struct lejp_ctx ctx;
int n, m, fd;
fd = open(f, O_RDONLY);
if (fd < 0) {
lwsl_err("Cannot open %s\n", f);
return 2;
}
lwsl_info("%s: %s\n", __func__, f);
lejp_construct(&ctx, cb, user, paths, count_paths);
do {
n = read(fd, buf, sizeof(buf));
if (!n)
break;
m = (int)(signed char)lejp_parse(&ctx, buf, n);
} while (m == LEJP_CONTINUE);
close(fd);
n = ctx.line;
lejp_destruct(&ctx);
if (m < 0) {
lwsl_err("%s(%u): parsing error %d: %s\n", f, n, m,
parser_errs[-m]);
return 2;
}
return 0;
}
int callback_http(struct lws *wsi, enum lws_callback_reasons reason, void *user,
void *in, size_t len)
{
struct per_session_data__http *pss =
(struct per_session_data__http *)user;
unsigned char buffer[4096 + LWS_PRE];
unsigned long amount, file_len, sent;
char leaf_path[1024];
const char *mimetype;
char *other_headers;
unsigned char *end;
struct timeval tv;
unsigned char *p;
char buf[256];
char b64[64];
int n, m;
#ifdef EXTERNAL_POLL
struct lws_pollargs *pa = (struct lws_pollargs *)in;
#endif
switch (reason) {
case LWS_CALLBACK_HTTP:
if (debug_level & LLL_INFO) {
dump_handshake_info(wsi);
/* dump the individual URI Arg parameters */
n = 0;
while (lws_hdr_copy_fragment(wsi, buf, sizeof(buf),
WSI_TOKEN_HTTP_URI_ARGS, n) > 0) {
lwsl_notice("URI Arg %d: %s\n", ++n, buf);
}
}
{
char name[100], rip[50];
lws_get_peer_addresses(wsi, lws_get_socket_fd(wsi), name,
sizeof(name), rip, sizeof(rip));
sprintf(buf, "%s (%s)", name, rip);
lwsl_notice("HTTP connect from %s\n", buf);
}
if (len < 1) {
lws_return_http_status(wsi,
HTTP_STATUS_BAD_REQUEST, NULL);
goto try_to_reuse;
}
/* this example server has no concept of directories */
if (strchr((const char *)in + 1, '/')) {
lws_return_http_status(wsi, HTTP_STATUS_FORBIDDEN, NULL);
goto try_to_reuse;
}
/* if a legal POST URL, let it continue and accept data */
if (lws_hdr_total_length(wsi, WSI_TOKEN_POST_URI))
return 0;
/* check for the "send a big file by hand" example case */
if (!strcmp((const char *)in, "/leaf.jpg")) {
if (strlen(resource_path) > sizeof(leaf_path) - 10)
return -1;
sprintf(leaf_path, "%s/leaf.jpg", resource_path);
/* well, let's demonstrate how to send the hard way */
p = buffer + LWS_PRE;
end = p + sizeof(buffer) - LWS_PRE;
pss->fd = lws_plat_file_open(wsi, leaf_path, &file_len,
LWS_O_RDONLY);
if (pss->fd == LWS_INVALID_FILE) {
lwsl_err("faild to open file %s\n", leaf_path);
return -1;
}
/*
* we will send a big jpeg file, but it could be
* anything. Set the Content-Type: appropriately
* so the browser knows what to do with it.
*
* Notice we use the APIs to build the header, which
* will do the right thing for HTTP 1/1.1 and HTTP2
* depending on what connection it happens to be working
* on
*/
if (lws_add_http_header_status(wsi, 200, &p, end))
return 1;
if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_SERVER,
(unsigned char *)"libwebsockets",
13, &p, end))
return 1;
if (lws_add_http_header_by_token(wsi,
WSI_TOKEN_HTTP_CONTENT_TYPE,
(unsigned char *)"image/jpeg",
10, &p, end))
return 1;
if (lws_add_http_header_content_length(wsi,
file_len, &p,
end))
return 1;
if (lws_finalize_http_header(wsi, &p, end))
return 1;
/*
* send the http headers...
* this won't block since it's the first payload sent
* on the connection since it was established
* (too small for partial)
*
* Notice they are sent using LWS_WRITE_HTTP_HEADERS
* which also means you can't send body too in one step,
* this is mandated by changes in HTTP2
*/
*p = '\0';
lwsl_info("%s\n", buffer + LWS_PRE);
n = lws_write(wsi, buffer + LWS_PRE, p - (buffer + LWS_PRE),
LWS_WRITE_HTTP_HEADERS);
if (n < 0) {
lws_plat_file_close(wsi, pss->fd);
return -1;
}
/*
* book us a LWS_CALLBACK_HTTP_WRITEABLE callback
*/
lws_callback_on_writable(wsi);
break;
}
/* if not, send a file the easy way */
strcpy(buf, resource_path);
if (strcmp(in, "/")) {
if (*((const char *)in) != '/')
strcat(buf, "/");
strncat(buf, in, sizeof(buf) - strlen(resource_path));
} else /* default file to serve */
strcat(buf, "/test.html");
buf[sizeof(buf) - 1] = '\0';
/* refuse to serve files we don't understand */
mimetype = get_mimetype(buf);
if (!mimetype) {
lwsl_err("Unknown mimetype for %s\n", buf);
lws_return_http_status(wsi,
HTTP_STATUS_UNSUPPORTED_MEDIA_TYPE, NULL);
return -1;
}
/* demonstrates how to set a cookie on / */
other_headers = leaf_path;
p = (unsigned char *)leaf_path;
if (!strcmp((const char *)in, "/") &&
!lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_COOKIE)) {
/* this isn't very unguessable but it'll do for us */
gettimeofday(&tv, NULL);
n = sprintf(b64, "test=LWS_%u_%u_COOKIE;Max-Age=360000",
(unsigned int)tv.tv_sec,
(unsigned int)tv.tv_usec);
if (lws_add_http_header_by_name(wsi,
(unsigned char *)"set-cookie:",
(unsigned char *)b64, n, &p,
(unsigned char *)leaf_path + sizeof(leaf_path)))
return 1;
}
if (lws_is_ssl(wsi) && lws_add_http_header_by_name(wsi,
(unsigned char *)
"Strict-Transport-Security:",
(unsigned char *)
"max-age=15768000 ; "
"includeSubDomains", 36, &p,
(unsigned char *)leaf_path +
sizeof(leaf_path)))
return 1;
n = (char *)p - leaf_path;
n = lws_serve_http_file(wsi, buf, mimetype, other_headers, n);
if (n < 0 || ((n > 0) && lws_http_transaction_completed(wsi)))
return -1; /* error or can't reuse connection: close the socket */
/*
* notice that the sending of the file completes asynchronously,
* we'll get a LWS_CALLBACK_HTTP_FILE_COMPLETION callback when
* it's done
*/
break;
case LWS_CALLBACK_HTTP_BODY:
strncpy(buf, in, 20);
buf[20] = '\0';
if (len < 20)
buf[len] = '\0';
lwsl_notice("LWS_CALLBACK_HTTP_BODY: %s... len %d\n",
(const char *)buf, (int)len);
break;
case LWS_CALLBACK_HTTP_BODY_COMPLETION:
lwsl_notice("LWS_CALLBACK_HTTP_BODY_COMPLETION\n");
/* the whole of the sent body arrived, close or reuse the connection */
lws_return_http_status(wsi, HTTP_STATUS_OK, NULL);
goto try_to_reuse;
case LWS_CALLBACK_HTTP_FILE_COMPLETION:
goto try_to_reuse;
case LWS_CALLBACK_HTTP_WRITEABLE:
lwsl_info("LWS_CALLBACK_HTTP_WRITEABLE\n");
if (pss->fd == LWS_INVALID_FILE)
goto try_to_reuse;
/*
* we can send more of whatever it is we were sending
*/
sent = 0;
do {
/* we'd like the send this much */
n = sizeof(buffer) - LWS_PRE;
/* but if the peer told us he wants less, we can adapt */
m = lws_get_peer_write_allowance(wsi);
/* -1 means not using a protocol that has this info */
if (m == 0)
/* right now, peer can't handle anything */
goto later;
if (m != -1 && m < n)
/* he couldn't handle that much */
n = m;
n = lws_plat_file_read(wsi, pss->fd,
&amount, buffer + LWS_PRE, n);
/* problem reading, close conn */
if (n < 0) {
lwsl_err("problem reading file\n");
goto bail;
}
n = (int)amount;
/* sent it all, close conn */
if (n == 0)
goto penultimate;
/*
* To support HTTP2, must take care about preamble space
*
* identification of when we send the last payload frame
* is handled by the library itself if you sent a
* content-length header
*/
m = lws_write(wsi, buffer + LWS_PRE, n, LWS_WRITE_HTTP);
if (m < 0) {
lwsl_err("write failed\n");
/* write failed, close conn */
goto bail;
}
if (m) /* while still active, extend timeout */
lws_set_timeout(wsi, PENDING_TIMEOUT_HTTP_CONTENT, 5);
sent += m;
} while (!lws_send_pipe_choked(wsi) && (sent < 1024 * 1024));
later:
lws_callback_on_writable(wsi);
break;
penultimate:
lws_plat_file_close(wsi, pss->fd);
pss->fd = LWS_INVALID_FILE;
goto try_to_reuse;
bail:
lws_plat_file_close(wsi, pss->fd);
return -1;
/*
* callback for confirming to continue with client IP appear in
* protocol 0 callback since no websocket protocol has been agreed
* yet. You can just ignore this if you won't filter on client IP
* since the default uhandled callback return is 0 meaning let the
* connection continue.
*/
case LWS_CALLBACK_FILTER_NETWORK_CONNECTION:
/* if we returned non-zero from here, we kill the connection */
break;
/*
* callbacks for managing the external poll() array appear in
* protocol 0 callback
*/
case LWS_CALLBACK_LOCK_POLL:
/*
* lock mutex to protect pollfd state
* called before any other POLL related callback
* if protecting wsi lifecycle change, len == 1
*/
test_server_lock(len);
break;
case LWS_CALLBACK_UNLOCK_POLL:
/*
* unlock mutex to protect pollfd state when
* called after any other POLL related callback
* if protecting wsi lifecycle change, len == 1
*/
test_server_unlock(len);
break;
#ifdef EXTERNAL_POLL
case LWS_CALLBACK_ADD_POLL_FD:
if (count_pollfds >= max_poll_elements) {
lwsl_err("LWS_CALLBACK_ADD_POLL_FD: too many sockets to track\n");
return 1;
}
fd_lookup[pa->fd] = count_pollfds;
pollfds[count_pollfds].fd = pa->fd;
pollfds[count_pollfds].events = pa->events;
pollfds[count_pollfds++].revents = 0;
break;
case LWS_CALLBACK_DEL_POLL_FD:
if (!--count_pollfds)
break;
m = fd_lookup[pa->fd];
/* have the last guy take up the vacant slot */
pollfds[m] = pollfds[count_pollfds];
fd_lookup[pollfds[count_pollfds].fd] = m;
break;
case LWS_CALLBACK_CHANGE_MODE_POLL_FD:
pollfds[fd_lookup[pa->fd]].events = pa->events;
break;
#endif
case LWS_CALLBACK_GET_THREAD_ID:
/*
* if you will call "lws_callback_on_writable"
* from a different thread, return the caller thread ID
* here so lws can use this information to work out if it
* should signal the poll() loop to exit and restart early
*/
/* return pthread_getthreadid_np(); */
break;
default:
break;
}
return 0;
/* if we're on HTTP1.1 or 2.0, will keep the idle connection alive */
try_to_reuse:
if (lws_http_transaction_completed(wsi))
return -1;
return 0;
}