/**
* Pack the data frame into a buffer for transmitting.
* @param out Target buffer
* @param bufsize Size of the target buffer
* @param outlen Length of the data written by this function
* @param frame Frame to pack
* @see spdy_data_frame
* @return Errorcode
*/
int spdy_data_frame_pack_header(char *out, size_t bufsize,
size_t *outlen, spdy_data_frame *frame)
{
if(bufsize < 8)
return SPDY_ERROR_TOO_SMALL_BUFFER;
BE_STORE_32(out, (frame->stream_id & 0x8FFFFFFF));
out += 4;
BE_STORE_32(out, frame->length);
/* The flags are set after the length is written, because
* otherwise the flags would get overwritten by the length. */
out[0] = frame->flags;
*outlen = 8;
return SPDY_ERROR_NONE;
}
/*
* Pack SYN_STREAM into an output buffer for transmitting.
*/
int spdy_syn_stream_pack(unsigned char *out, size_t bufsize,
size_t *outsize, spdy_syn_stream *str)
{
char buf[2];
size_t consumed;
char *deflated;
size_t deflated_length;
int rc;
if(bufsize < 10)
return SPDY_ERROR_TOO_SMALL_BUFFER;
BE_STORE_32(out, str->stream_id);
out += 4;
BE_STORE_32(out, str->associated_to);
out += 4;
BE_STORE_16(out, (str->priority << 14)); /* 14 bits unused */
out += 2;
/* create the NV block to include */
BE_STORE_16(buf, 0); /* 16 bit NV pair counter */
rc = spdy_zlib_deflate(buf, 2, &consumed, &deflated, &deflated_length);
if(rc)
return rc;
if(bufsize < (10 + deflated_length)) {
free(deflated);
return SPDY_ERROR_TOO_SMALL_BUFFER;
}
memcpy(out, deflated, deflated_length);
free(deflated);
*outsize = 10 + deflated_length;
return SPDY_ERROR_NONE;
}
