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HPACK: take sizing to 0 as clear existing

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Apparently some peers set the HPACK size to zero and then try
to set HPACK dynamic elements.  Take it to mean keep the same
size but clear it down.
This commit is contained in:
Andy Green 2019-07-08 11:33:52 +01:00
parent 3b44a745c9
commit 79bb26b6bd
1 changed files with 5 additions and 0 deletions
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5
lib/roles/h2/hpack.c
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@ -597,6 +597,11 @@ lws_hpack_dynamic_size(struct lws *wsi, int size)
(int)dyn->num_entries, size,
nwsi->vhost->h2.set.s[H2SET_HEADER_TABLE_SIZE]);
if (!size) {
size = dyn->num_entries * 8;
lws_hpack_destroy_dynamic_header(wsi);
}
if (size > (int)nwsi->vhost->h2.set.s[H2SET_HEADER_TABLE_SIZE]) {
lwsl_info("rejecting hpack dyn size %u vs %u\n", size,
nwsi->vhost->h2.set.s[H2SET_HEADER_TABLE_SIZE]);