/* * nghttp2 - HTTP/2 C Library * * Copyright (c) 2012 Tatsuhiro Tsujikawa * * 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. */ #include "nghttp2_npn.h" #include int nghttp2_select_next_protocol(unsigned char **out, unsigned char *outlen, const unsigned char *in, unsigned int inlen) { int http_selected = 0; unsigned int i = 0; for (; i < inlen; i += in [i] + 1) { if (in[i] == NGHTTP2_PROTO_VERSION_ID_LEN && i + 1 + in[i] <= inlen && memcmp(&in[i + 1], NGHTTP2_PROTO_VERSION_ID, in[i]) == 0) { *out = (unsigned char *)&in[i + 1]; *outlen = in[i]; return 1; } if (in[i] == 8 && i + 1 + in[i] <= inlen && memcmp(&in[i + 1], "http/1.1", in[i]) == 0) { http_selected = 1; *out = (unsigned char *)&in[i + 1]; *outlen = in[i]; /* Go through to the next iteration, because "HTTP/2" may be there */ } } if (http_selected) { return 0; } else { return -1; } }