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-rw-r--r--src/protocol/reqrep0/rep.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/protocol/reqrep0/rep.c b/src/protocol/reqrep0/rep.c
index c483b777..24fc7335 100644
--- a/src/protocol/reqrep0/rep.c
+++ b/src/protocol/reqrep0/rep.c
@@ -346,6 +346,11 @@ rep0_pipe_start(void *arg)
rep0_sock *s = p->rep;
int rv;
+ if (nni_pipe_peer(p->pipe) != NNI_PROTO_REQ_V0) {
+ // Peer protocol mismatch.
+ return (NNG_EPROTO);
+ }
+
if ((rv = nni_idhash_insert(s->pipes, nni_pipe_id(p->pipe), p)) != 0) {
return (rv);
}