mirror of
https://github.com/warmcat/libwebsockets.git
synced 2025-03-16 00:00:07 +01:00
e4ab18342a
Some streamtypes do not pass or receive payload meaningfully. Allow them to just leave their related cb NULL. Ditto for state, although I'm not sure how useful such a streamtype can be.
149 lines
4.1 KiB
C
149 lines
4.1 KiB
C
/*
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* libwebsockets - small server side websockets and web server implementation
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*
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* Copyright (C) 2019 - 2020 Andy Green <andy@warmcat.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* This is the glue that wires up raw-socket to Secure Streams.
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*/
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#include <private-lib-core.h>
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int
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secstream_raw(struct lws *wsi, enum lws_callback_reasons reason, void *user,
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void *in, size_t len)
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{
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lws_ss_handle_t *h = (lws_ss_handle_t *)lws_get_opaque_user_data(wsi);
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uint8_t buf[LWS_PRE + 1520], *p = &buf[LWS_PRE],
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*end = &buf[sizeof(buf) - 1];
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int f = 0, txr;
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size_t buflen;
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switch (reason) {
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case LWS_CALLBACK_CLIENT_CONNECTION_ERROR:
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assert(h);
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assert(h->policy);
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lwsl_info("%s: h: %p, %s CLIENT_CONNECTION_ERROR: %s\n", __func__,
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h, h->policy->streamtype, in ? (char *)in : "(null)");
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lws_ss_event_helper(h, LWSSSCS_UNREACHABLE);
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h->wsi = NULL;
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lws_ss_backoff(h);
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break;
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case LWS_CALLBACK_RAW_CLOSE:
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if (!h)
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break;
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lwsl_info("%s: h: %p, %s LWS_CALLBACK_CLOSED_CLIENT_HTTP\n",
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__func__, h,
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h->policy ? h->policy->streamtype : "no policy");
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h->wsi = NULL;
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if (h->policy && !(h->policy->flags & LWSSSPOLF_OPPORTUNISTIC) &&
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!h->txn_ok && !wsi->context->being_destroyed)
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lws_ss_backoff(h);
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if (lws_ss_event_helper(h, LWSSSCS_DISCONNECTED))
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lws_ss_destroy(&h);
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break;
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case LWS_CALLBACK_RAW_CONNECTED:
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lwsl_info("%s: RAW_CONNECTED\n", __func__);
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h->retry = 0;
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h->seqstate = SSSEQ_CONNECTED;
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lws_sul_cancel(&h->sul);
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lws_ss_event_helper(h, LWSSSCS_CONNECTED);
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lws_validity_confirmed(wsi);
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break;
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/* chunks of chunked content, with header removed */
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case LWS_CALLBACK_RAW_RX:
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if (!h || !h->info.rx)
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return 0;
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if (h->info.rx(ss_to_userobj(h), (const uint8_t *)in, len, 0) < 0)
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return -1;
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return 0; /* don't passthru */
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case LWS_CALLBACK_RAW_WRITEABLE:
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lwsl_info("%s: RAW_WRITEABLE\n", __func__);
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if (!h || !h->info.tx)
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return 0;
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buflen = lws_ptr_diff(end, p);
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txr = h->info.tx(ss_to_userobj(h), h->txord++, p, &buflen, &f);
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if (txr < 0) {
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lwsl_debug("%s: tx handler asked to close\n", __func__);
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return -1;
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}
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if (txr > 0) {
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/* don't want to send anything */
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lwsl_debug("%s: dont want to write\n", __func__);
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return 0;
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}
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/*
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* flags are ignored with raw, there are no protocol payload
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* boundaries, just an arbitrarily-fragmented bytestream
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*/
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p += buflen;
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if (lws_write(wsi, buf + LWS_PRE, lws_ptr_diff(p, buf + LWS_PRE),
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LWS_WRITE_HTTP) != (int)lws_ptr_diff(p, buf + LWS_PRE)) {
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lwsl_err("%s: write failed\n", __func__);
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return -1;
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}
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lws_set_timeout(wsi, 0, 0);
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break;
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default:
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break;
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}
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return lws_callback_http_dummy(wsi, reason, user, in, len);
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}
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static int
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secstream_connect_munge_raw(lws_ss_handle_t *h, char *buf, size_t len,
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struct lws_client_connect_info *i,
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union lws_ss_contemp *ct)
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{
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i->method = "RAW";
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return 0;
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}
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const struct lws_protocols protocol_secstream_raw = {
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"lws-secstream-raw",
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secstream_raw,
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0,
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0,
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};
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const struct ss_pcols ss_pcol_raw = {
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"raw",
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"",
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"lws-secstream-raw",
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secstream_connect_munge_raw,
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NULL
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};
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