mirror of
https://github.com/warmcat/libwebsockets.git
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4b85c1d4ac
This nukes all the oldstyle prefixes except in the compatibility code. struct libwebsockets becomes struct lws too. The api docs are updated accordingly as are the READMEs that mention those apis. Signed-off-by: Andy Green <andy.green@linaro.org>
154 lines
No EOL
4.5 KiB
C
154 lines
No EOL
4.5 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) 2010-2014 Andy Green <andy@warmcat.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation:
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* version 2.1 of the License.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*
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* Some or all of this file is based on code from nghttp2, which has the
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* following license. Since it's more liberal than lws license, you're also
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* at liberty to get the original code from
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* https://github.com/tatsuhiro-t/nghttp2 under his liberal terms alone.
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*
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* nghttp2 - HTTP/2.0 C Library
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*
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* Copyright (c) 2012 Tatsuhiro Tsujikawa
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in 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,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "private-libwebsockets.h"
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#ifndef LWS_NO_SERVER
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#ifdef LWS_OPENSSL_SUPPORT
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#if OPENSSL_VERSION_NUMBER >= 0x10002000L
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struct alpn_ctx {
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unsigned char *data;
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unsigned short len;
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};
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static int npn_cb(SSL *s, const unsigned char **data, unsigned int *len, void *arg)
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{
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struct alpn_ctx *alpn_ctx = arg;
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lwsl_info("%s\n", __func__);
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*data = alpn_ctx->data;
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*len = alpn_ctx->len;
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return SSL_TLSEXT_ERR_OK;
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}
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static int alpn_cb(SSL *s, const unsigned char **out,
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unsigned char *outlen, const unsigned char *in,
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unsigned int inlen, void *arg)
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{
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struct alpn_ctx *alpn_ctx = arg;
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if (SSL_select_next_proto((unsigned char **)out, outlen,
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alpn_ctx->data, alpn_ctx->len, in, inlen) !=
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OPENSSL_NPN_NEGOTIATED)
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return SSL_TLSEXT_ERR_NOACK;
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return SSL_TLSEXT_ERR_OK;
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}
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#endif
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LWS_VISIBLE void
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lws_context_init_http2_ssl(struct lws_context *context)
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{
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#if OPENSSL_VERSION_NUMBER >= 0x10002000L
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static struct alpn_ctx protos = { (unsigned char *)
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"\x05h2-14"
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"\x08http/1.1",
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6 + 9 };
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SSL_CTX_set_next_protos_advertised_cb(context->ssl_ctx, npn_cb, &protos);
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// ALPN selection callback
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SSL_CTX_set_alpn_select_cb(context->ssl_ctx, alpn_cb, &protos);
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lwsl_notice(" HTTP2 / ALPN enabled\n");
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#else
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lwsl_notice(
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" HTTP2 / ALPN configured but not supported by OpenSSL 0x%x\n",
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OPENSSL_VERSION_NUMBER);
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#endif // OPENSSL_VERSION_NUMBER >= 0x10002000L
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}
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void lws_http2_configure_if_upgraded(struct lws *wsi)
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{
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#if OPENSSL_VERSION_NUMBER >= 0x10002000L
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struct allocated_headers *ah;
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const unsigned char *name;
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unsigned len;
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const char *method = "alpn";
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SSL_get0_alpn_selected(wsi->ssl, &name, &len);
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if (!len) {
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SSL_get0_next_proto_negotiated(wsi->ssl, &name, &len);
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method = "npn";
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}
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if (!len) {
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lwsl_info("no npn/alpn upgrade\n");
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return;
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}
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lwsl_info("negotiated %s using %s\n", name, method);
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wsi->use_ssl = 1;
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if (strncmp((char *)name, "http/1.1", 8) == 0)
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return;
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/* http2 */
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/* adopt the header info */
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ah = wsi->u.hdr.ah;
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lws_union_transition(wsi, LWS_CONNMODE_HTTP2_SERVING);
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wsi->state = WSI_STATE_HTTP2_AWAIT_CLIENT_PREFACE;
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/* http2 union member has http union struct at start */
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wsi->u.http.ah = ah;
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lws_http2_init(&wsi->u.http2.peer_settings);
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lws_http2_init(&wsi->u.http2.my_settings);
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/* HTTP2 union */
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#endif
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}
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#endif
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#endif |