nghttp2/lib/nghttp2_helper.c

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/*
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* nghttp2 - HTTP/2.0 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.
*/
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#include "nghttp2_helper.h"
#include <string.h>
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#include "nghttp2_net.h"
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void nghttp2_put_uint16be(uint8_t *buf, uint16_t n)
{
uint16_t x = htons(n);
memcpy(buf, &x, sizeof(uint16_t));
}
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void nghttp2_put_uint32be(uint8_t *buf, uint32_t n)
{
uint32_t x = htonl(n);
memcpy(buf, &x, sizeof(uint32_t));
}
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uint16_t nghttp2_get_uint16(const uint8_t *data)
{
uint16_t n;
memcpy(&n, data, sizeof(uint16_t));
return ntohs(n);
}
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uint32_t nghttp2_get_uint32(const uint8_t *data)
{
uint32_t n;
memcpy(&n, data, sizeof(uint32_t));
return ntohl(n);
}
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int nghttp2_reserve_buffer(uint8_t **buf_ptr, size_t *buflen_ptr,
size_t min_length)
{
if(min_length > *buflen_ptr) {
uint8_t *temp;
min_length = (min_length+4095)/4096*4096;
temp = malloc(min_length);
if(temp == NULL) {
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return NGHTTP2_ERR_NOMEM;
} else {
free(*buf_ptr);
*buf_ptr = temp;
*buflen_ptr = min_length;
}
}
return 0;
}
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const char* nghttp2_strerror(int error_code)
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{
switch(error_code) {
case 0:
return "Success";
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case NGHTTP2_ERR_INVALID_ARGUMENT:
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return "Invalid argument";
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case NGHTTP2_ERR_ZLIB:
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return "Zlib error";
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case NGHTTP2_ERR_UNSUPPORTED_VERSION:
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return "Unsupported SPDY version";
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case NGHTTP2_ERR_WOULDBLOCK:
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return "Operation would block";
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case NGHTTP2_ERR_PROTO:
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return "Protocol error";
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case NGHTTP2_ERR_INVALID_FRAME:
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return "Invalid frame octets";
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case NGHTTP2_ERR_EOF:
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return "EOF";
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case NGHTTP2_ERR_DEFERRED:
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return "Data transfer deferred";
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case NGHTTP2_ERR_STREAM_ID_NOT_AVAILABLE:
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return "No more Stream ID available";
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case NGHTTP2_ERR_STREAM_CLOSED:
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return "Stream was already closed or invalid";
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case NGHTTP2_ERR_STREAM_CLOSING:
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return "Stream is closing";
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case NGHTTP2_ERR_STREAM_SHUT_WR:
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return "The transmission is not allowed for this stream";
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case NGHTTP2_ERR_INVALID_STREAM_ID:
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return "Stream ID is invalid";
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case NGHTTP2_ERR_INVALID_STREAM_STATE:
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return "Invalid stream state";
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case NGHTTP2_ERR_DEFERRED_DATA_EXIST:
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return "Another DATA frame has already been deferred";
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case NGHTTP2_ERR_START_STREAM_NOT_ALLOWED:
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return "SYN_STREAM is not allowed";
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case NGHTTP2_ERR_GOAWAY_ALREADY_SENT:
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return "GOAWAY has already been sent";
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case NGHTTP2_ERR_INVALID_HEADER_BLOCK:
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return "Invalid header block";
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case NGHTTP2_ERR_INVALID_STATE:
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return "Invalid state";
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case NGHTTP2_ERR_GZIP:
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return "Gzip error";
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case NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE:
return "The user callback function failed due to the temporal error";
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case NGHTTP2_ERR_FRAME_TOO_LARGE:
return "The length of the frame is too large";
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case NGHTTP2_ERR_NOMEM:
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return "Out of memory";
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case NGHTTP2_ERR_CALLBACK_FAILURE:
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return "The user callback function failed";
default:
return "Unknown error code";
}
}