mirror of
https://libwebsockets.org/repo/libwebsockets
synced 2024-11-22 00:57:52 +00:00
962e9ee345
C++ APIs wrapping SS client These are intended to provide an experimental protocol-independent c++ api even more abstracted than secure streams, along the lines of "wget -Omyfile https://example.com/thing" WIP
155 lines
3.8 KiB
C++
155 lines
3.8 KiB
C++
/*
|
|
* libwebsockets - small server side websockets and web server implementation
|
|
*
|
|
* Copyright (C) 2020 Andy Green <andy@warmcat.com>
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to
|
|
* deal in the Software without restriction, including without limitation the
|
|
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
|
* sell copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
* IN THE SOFTWARE.
|
|
*
|
|
* C++ classes for Secure Streams
|
|
*/
|
|
|
|
#include <libwebsockets.hxx>
|
|
|
|
static const char *pcols[] = {
|
|
"http://", /* LWSSSP_H1 */
|
|
"https://",
|
|
"h2://", /* LWSSSP_H2 */
|
|
"h2s://",
|
|
"ws://", /* LWSSSP_WS */
|
|
"wss://",
|
|
"mqtt://", /* LWSSSP_MQTT */
|
|
"mqtts://",
|
|
"raw://", /* LWSSSP_RAW */
|
|
"raws://",
|
|
};
|
|
|
|
static const uint8_t pcols_len[] = {
|
|
7, 8, 5, 6, 5, 6, 7, 8, 6, 7
|
|
};
|
|
|
|
static const uint16_t pcols_port[] = {
|
|
80, 443, 443, 443, 80, 443, 1883, 8883, 80, 443
|
|
};
|
|
|
|
lss::lss(lws_ctx_t _ctx, std::string _uri, lsscomp_t _comp, bool _psh,
|
|
lws_sscb_rx rx, lws_sscb_tx tx, lws_sscb_state state)
|
|
{
|
|
const char *p, *urlpath;
|
|
lws_ss_info_t ssi;
|
|
int n, port;
|
|
|
|
memset(&ssi, 0, sizeof(ssi));
|
|
memset(&pol, 0, sizeof(pol));
|
|
|
|
ctx = _ctx;
|
|
comp = _comp;
|
|
comp_done = 0;
|
|
rxlen = 0;
|
|
|
|
/*
|
|
* We have a common stub userdata, our "real" userdata is in the
|
|
* derived class members. The Opaque user pointer points to the
|
|
* lss itself.
|
|
*/
|
|
|
|
ssi.handle_offset = offsetof(lssPriv, lssPriv::m_ss);
|
|
ssi.opaque_user_data_offset = offsetof(lssPriv, lssPriv::m_plss);
|
|
|
|
ssi.user_alloc = sizeof(lssPriv);
|
|
ssi.rx = rx;
|
|
ssi.tx = tx;
|
|
ssi.state = state;
|
|
ssi.policy = &pol; /* we will provide our own policy */
|
|
|
|
/*
|
|
* _uri is like "https://warmcat.com:443/index.html"... we need to
|
|
* deconstruct it into its policy implications
|
|
*/
|
|
|
|
uri = strdup(_uri.c_str());
|
|
|
|
for (n = 0; n < LWS_ARRAY_SIZE(pcols); n++)
|
|
if (!strncmp(uri, pcols[n], pcols_len[n]))
|
|
break;
|
|
|
|
if (n == LWS_ARRAY_SIZE(pcols))
|
|
throw lssException("unknown uri protocol://");
|
|
|
|
pol.protocol = n >> 1;
|
|
if (n & 1)
|
|
pol.flags |= LWSSSPOLF_TLS;
|
|
|
|
n = pcols_port[n];
|
|
|
|
if (lws_parse_uri(uri, &p, &pol.endpoint, &n, &urlpath))
|
|
throw lssException("unable to parse uri://");
|
|
|
|
pol.port = (uint16_t)n;
|
|
|
|
if (pol.protocol <= LWSSSP_WS) {
|
|
pol.u.http.url = urlpath;
|
|
|
|
/*
|
|
* These are workarounds for common h2 server noncompliances
|
|
*/
|
|
|
|
pol.flags |= LWSSSPOLF_QUIRK_NGHTTP2_END_STREAM |
|
|
LWSSSPOLF_H2_QUIRK_OVERFLOWS_TXCR |
|
|
LWSSSPOLF_H2_QUIRK_UNCLEAN_HPACK_STATE;
|
|
|
|
if (pol.protocol < LWSSSP_WS)
|
|
pol.u.http.method = _psh ? "POST" : "GET";
|
|
}
|
|
|
|
us_start = lws_now_usecs();
|
|
|
|
if (lws_ss_create(ctx, 0, &ssi, (void *)this, &m_ss, NULL, NULL))
|
|
goto blow;
|
|
|
|
if (pol.protocol <= LWSSSP_WS)
|
|
lws_ss_client_connect(m_ss);
|
|
|
|
return;
|
|
|
|
blow:
|
|
if (uri)
|
|
free(uri);
|
|
throw lssException("ss creation failed");
|
|
}
|
|
|
|
lss::~lss()
|
|
{
|
|
if (uri)
|
|
free(uri);
|
|
if (m_ss)
|
|
lws_ss_destroy(&m_ss);
|
|
}
|
|
|
|
int lss::call_completion(lws_ss_constate_t state)
|
|
{
|
|
if (comp_done)
|
|
return 0;
|
|
if (!comp)
|
|
return 0;
|
|
|
|
comp_done = 1;
|
|
|
|
return comp(this, state, NULL);
|
|
}
|