[mynewt-nimble] 19/32: mesh: Resend Link Acknowledgment when necessary

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commit 63b487ad59a15d268dc2a51d493ad0d2582dd49a
Author: Michał Narajowski <mi...@codecoup.pl>
AuthorDate: Tue Feb 20 14:24:33 2018 +0100

    mesh: Resend Link Acknowledgment when necessary
    
    The Provisioner might have missed our earlier Link Acknowledgement, so
    if we receive another one with matching Link ID and link.expect state,
    simply send another acknowledgement.
    
    X-Original-Commit: b6d823cb5131e8750d7ec1152b4d48ea60ac85c3
---
 nimble/host/mesh/src/prov.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/nimble/host/mesh/src/prov.c b/nimble/host/mesh/src/prov.c
index 0a2d3b2..04cab17 100644
--- a/nimble/host/mesh/src/prov.c
+++ b/nimble/host/mesh/src/prov.c
@@ -1179,7 +1179,14 @@ static void link_open(struct prov_rx *rx, struct os_mbuf *buf)
 	}
 
 	if (atomic_test_bit(link.flags, LINK_ACTIVE)) {
-		BT_WARN("Ignoring bearer open: link already active");
+		/* Send another link ack if the provisioner missed the last */
+		if (link.id == rx->link_id && link.expect == PROV_INVITE) {
+			BT_DBG("Resending link ack");
+			bearer_ctl_send(LINK_ACK, NULL, 0);
+		} else {
+			BT_WARN("Ignoring bearer open: link already active");
+		}
+
 		return;
 	}
 

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