mirror of
https://github.com/moparisthebest/spdylay
synced 2024-11-11 12:05:07 -05:00
84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
/*
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* Spdylay - SPDY 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 "spdylay_npn.h"
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#include <string.h>
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typedef struct {
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const unsigned char *proto;
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uint8_t len;
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uint16_t version;
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} spdylay_npn_proto;
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int spdylay_select_next_protocol(unsigned char **out, unsigned char *outlen,
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const unsigned char *in, unsigned int inlen)
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{
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int http_selected = 0;
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unsigned int i = 0;
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static const spdylay_npn_proto proto_list[] = {
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{ (const unsigned char*)"spdy/2", 6, SPDYLAY_PROTO_SPDY2 },
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{ (const unsigned char*)"spdy/3", 6, SPDYLAY_PROTO_SPDY3 }
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};
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for(; i < inlen; i += in[i]+1) {
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int j;
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for(j = 0; j < sizeof(proto_list)/sizeof(spdylay_npn_proto); ++j) {
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if(in[i] == proto_list[j].len &&
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memcmp(&in[i+1], proto_list[j].proto, in[i]) == 0) {
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*out = (unsigned char*)&in[i+1];
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*outlen = in[i];
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return proto_list[j].version;
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}
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}
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if(in[i] == 8 && memcmp(&in[i+1], "http/1.1", in[i]) == 0) {
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http_selected = 1;
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*out = (unsigned char*)&in[i+1];
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*outlen = in[i];
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/* Go through to the next iteration, because "spdy/2" may be
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there */
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}
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}
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if(http_selected) {
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return 0;
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} else {
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return -1;
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}
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}
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uint16_t spdylay_npn_get_version(const unsigned char *proto, size_t protolen)
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{
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if(proto == NULL) {
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return 0;
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} else {
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if(protolen == 6) {
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if(memcmp("spdy/2", proto, 6) == 0) {
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return SPDYLAY_PROTO_SPDY2;
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} else if(memcmp("spdy/3", proto, 6) == 0) {
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return SPDYLAY_PROTO_SPDY3;
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}
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}
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return 0;
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}
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}
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