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Strictly check occurrence of dynamic table size update

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RFC 7541 requires that dynamic table size update must occur at the
beginning of the first header block, and is signaled as SETTINGS
acknowledgement.  This commit checks these conditions.  If dynamic
table size update appears other than the beginning of the first header
block, it is treated as error.  If SETTINGS ACK is received, and next
HEADERS header block does not have dynamic table size update, it is
treated as error.
This commit is contained in:
Tatsuhiro Tsujikawa
2015-07-22 00:11:23 +09:00
parent 18234b8741
commit f3288092e8
6 changed files with 95 additions and 2 deletions
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11
lib/includes/nghttp2/nghttp2.h
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@@ -3777,11 +3777,22 @@ NGHTTP2_EXTERN void nghttp2_hd_inflate_del(nghttp2_hd_inflater *inflater);
* The |settings_hd_table_bufsize_max| should be the value transmitted
* in SETTINGS_HEADER_TABLE_SIZE.
*
* This function must not be called while header block is being
* inflated. In other words, this function must be called after
* initialization of |inflater|, but before calling
* `nghttp2_hd_inflate_hd()`, or after
* `nghttp2_hd_inflate_end_headers()`. Otherwise,
* `NGHTTP2_ERR_INVALID_STATE` was returned.
*
* This function returns 0 if it succeeds, or one of the following
* negative error codes:
*
* :enum:`NGHTTP2_ERR_NOMEM`
* Out of memory.
* :enum:`NGHTTP2_ERR_INVALID_STATE`
* The function is called while header block is being inflated.
* Probably, application missed to call
* `nghttp2_hd_inflate_end_headers()`.
*/
NGHTTP2_EXTERN int
nghttp2_hd_inflate_change_table_size(nghttp2_hd_inflater *inflater,