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OSPF: Fix handling of NSSA option flags

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Per RFC 3101, N-bit signalling NSSA support should be used only in Hello
packets, not in DBDES packets. BIRD since 2.0.4 verifies N-bit in
neighbor structure, which is learned from DBDES packets, therefore
NSSA-LSAs are not propagated to proper implementations of RFC 3101.

This patch fixes that. Both removing the check and removing N-bit from
DBDES packet. This will fix compatibility issues with proper
implementations, but causes compatibility issues with BIRD 2.0.4.
This commit is contained in:
Ondrej Zajicek (work)
2019-07-10 18:25:36 +02:00
parent 422a933429
commit 1aec7112f7
5 changed files with 14 additions and 8 deletions
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2
proto/ospf/ospf.c
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@@ -146,7 +146,7 @@ static inline uint
ospf_opts(struct ospf_proto *p)
{
if (ospf_is_v2(p))
return 0;
return OPT_O;
return ((ospf_is_ip6(p) && !p->af_mc) ? OPT_V6 : 0) |
(!p->stub_router ? OPT_R : 0) | (p->af_ext ? OPT_AF : 0);