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Babel: Seqno requests are properly decoupled from neighbors when the underlying interface disappears

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When an interface disappears, all the neighbors are freed as well. Seqno
requests were anyway not decoupled from them, leading to strange
segfaults. This fix adds a proper seqno request list inside neighbors to
make sure that no pointer to neighbor is kept after free.
This commit is contained in:
Maria Matejka
2021-05-30 13:07:16 +02:00
parent 10498b8e89
commit ebd5751cde
3 changed files with 22 additions and 13 deletions
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3
proto/babel/babel.h
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@@ -198,7 +198,6 @@ struct babel_neighbor {
struct babel_iface *ifa;
ip_addr addr;
uint uc; /* Reference counter for seqno requests */
u16 rxcost; /* Sent in last IHU */
u16 txcost; /* Received in last IHU */
u16 cost; /* Computed neighbor cost */
@@ -212,6 +211,7 @@ struct babel_neighbor {
btime ihu_expiry;
list routes; /* Routes this neighbour has sent us (struct babel_route) */
list requests; /* Seqno requests bound to this neighbor */
};
struct babel_source {
@@ -241,6 +241,7 @@ struct babel_route {
struct babel_seqno_request {
node n;
node nbr_node;
u64 router_id;
u16 seqno;
u8 hop_count;