mirror of
https://github.com/warmcat/libwebsockets.git
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a4148a13ba
The union used to make a lot of sense to save space between mutually exclusive modes. But the fact the http2 struct contains the http1 struct as well as it appearing in the union means the http1 struct belongs outside the union. This patch - eliminates the union - puts the http_related struct directly in struct lws - removes http_related from h2 - puts h2 directly in struct lws if enabled for build - changes ws to be a pointer, allocated if we upgrade to ws (the ws part contains a 135 byte char array for ping / close) Again all of this is entirely private / internal and doesn't affect any apis.
155 lines
4.7 KiB
C
155 lines
4.7 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) 2010-2017 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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#if !defined(LWS_NO_SERVER)
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#if defined(LWS_OPENSSL_SUPPORT)
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#if defined(LWS_WITH_MBEDTLS) || (defined(OPENSSL_VERSION_NUMBER) && \
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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
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alpn_cb(SSL *s, const unsigned char **out, unsigned char *outlen,
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const unsigned char *in, unsigned int inlen, void *arg)
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{
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#if !defined(LWS_WITH_MBEDTLS)
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struct alpn_ctx *alpn_ctx = arg;
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if (SSL_select_next_proto((unsigned char **)out, outlen, alpn_ctx->data,
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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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#endif
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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_vhost *vhost)
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{
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#if defined(LWS_WITH_MBEDTLS) || (defined(OPENSSL_VERSION_NUMBER) && \
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OPENSSL_VERSION_NUMBER >= 0x10002000L)
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static struct alpn_ctx protos = { (unsigned char *)"\x02h2"
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"\x08http/1.1", 6 + 9 };
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SSL_CTX_set_alpn_select_cb(vhost->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%lx\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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int lws_h2_configure_if_upgraded(struct lws *wsi)
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{
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#if defined(LWS_WITH_MBEDTLS) || (defined(OPENSSL_VERSION_NUMBER) && \
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OPENSSL_VERSION_NUMBER >= 0x10002000L)
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struct allocated_headers *ah;
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const unsigned char *name = NULL;
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char cstr[10];
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unsigned len;
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SSL_get0_alpn_selected(wsi->ssl, &name, &len);
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if (!len) {
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lwsl_info("no ALPN upgrade\n");
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return 0;
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}
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if (len > sizeof(cstr) - 1)
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len = sizeof(cstr) - 1;
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memcpy(cstr, name, len);
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cstr[len] = '\0';
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lwsl_info("negotiated '%s' using ALPN\n", cstr);
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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 0;
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/* http2 */
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wsi->upgraded_to_http2 = 1;
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wsi->vhost->conn_stats.h2_alpn++;
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/* adopt the header info */
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ah = wsi->ah;
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lws_union_transition(wsi, LWSCM_HTTP2_SERVING);
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wsi->state = LWSS_HTTP2_AWAIT_CLIENT_PREFACE;
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/* http2 union member has http union struct at start */
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wsi->ah = ah;
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wsi->h2.h2n = lws_zalloc(sizeof(*wsi->h2.h2n), "h2n");
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if (!wsi->h2.h2n)
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return 1;
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lws_h2_init(wsi);
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/* HTTP2 union */
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lws_hpack_dynamic_size(wsi,
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wsi->h2.h2n->set.s[H2SET_HEADER_TABLE_SIZE]);
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wsi->h2.tx_cr = 65535;
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lwsl_info("%s: wsi %p: configured for h2\n", __func__, wsi);
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#endif
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return 0;
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}
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#endif
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#endif
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