A Config BPDU always conveys a Designated Port Role.
Signed-off-by: Daniele Venturino <daniele.ventur...@m3s.it>
---
lib/rstp-state-machines.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/lib/rstp-state-machines.c b/lib/rstp-state-machines.c
index 13abec0..516093f 100644
--- a/lib/rstp-state-machines.c
+++ b/lib/rstp-state-machines.c
@@ -1026,8 +1026,13 @@ rcv_info(struct rstp_port *p)
cp = compare_rstp_priority_vectors(&p->msg_priority, &p->port_priority);
ct = rstp_times_equal(&p->port_times, &p->msg_times);
- role =
- (p->received_bpdu_buffer.flags & ROLE_FLAG_MASK) >> ROLE_FLAG_SHIFT;
+ /* Configuration BPDU conveys a Designated Port Role. */
+ if (p->received_bpdu_buffer.bpdu_type == CONFIGURATION_BPDU) {
+ role = PORT_DES;
+ } else {
+ role =
+ (p->received_bpdu_buffer.flags & ROLE_FLAG_MASK) >>
ROLE_FLAG_SHIFT;
+ }
/* 802.1D-2004 does not report this behaviour.
* 802.1Q-2008 says set rcvdTcn. */
@@ -1047,9 +1052,7 @@ rcv_info(struct rstp_port *p)
* 17.19.22).
* NOTE: Configuration BPDU explicitly conveys a Designated Port Role.
*/
- if ((role == PORT_DES
- || p->received_bpdu_buffer.bpdu_type == CONFIGURATION_BPDU)
- && (cp == SUPERIOR || (cp == SAME && ct == false))) {
+ if (role == PORT_DES && (cp == SUPERIOR || (cp == SAME && ct == false))) {
return SUPERIOR_DESIGNATED_INFO;
/* Returns RepeatedDesignatedInfo if:
--
1.8.1.2
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