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ofp-actions: enforce valid range for table_id in goto_table instruction

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Found a bug that OVS allows goto_table_id to be smaller than (or equal to)
the current table id where the flow resides. It potentially creates an
infinite loop when composing actions for a packet. To fix it, we just let
OVS returns an error message to prevent such flow to be programmed.

Signed-off-by: Jing Ai <jinga@google.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
This commit is contained in:
Jing Ai
2013-06-05 13:18:09 -07:00
committed by Ben Pfaff
parent 084c3bb434
commit bff7eeb648
6 changed files with 29 additions and 6 deletions
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lib/ofp-actions.h
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@@ -490,6 +490,7 @@ enum ofperr ofpacts_pull_openflow11_actions(struct ofpbuf *openflow,
struct ofpbuf *ofpacts);
enum ofperr ofpacts_pull_openflow11_instructions(struct ofpbuf *openflow,
unsigned int instructions_len,
uint8_t table_id,
struct ofpbuf *ofpacts);
enum ofperr ofpacts_check(const struct ofpact[], size_t ofpacts_len,
const struct flow *, int max_ports);