5 files changed, 9 insertions, 0 deletions
diff --git a/src/protocol/pipeline0/pull.c b/src/protocol/pipeline0/pull.c
index 44eb87f9..76c680c1 100644
--- a/src/protocol/pipeline0/pull.c
+++ b/src/protocol/pipeline0/pull.c
@@ -196,6 +196,7 @@ pull0_sock_getopt_raw(void *arg, void *buf, size_t *szp)
 static void
 pull0_sock_send(void *arg, nni_aio *aio)
 {
+	NNI_ARG_UNUSED(arg);
 	nni_aio_finish_error(aio, NNG_ENOTSUP);
 }
 
diff --git a/src/protocol/pipeline0/push.c b/src/protocol/pipeline0/push.c
index 2829e2aa..1e6cf30e 100644
--- a/src/protocol/pipeline0/push.c
+++ b/src/protocol/pipeline0/push.c
@@ -221,6 +221,7 @@ push0_sock_send(void *arg, nni_aio *aio)
 static void
 push0_sock_recv(void *arg, nni_aio *aio)
 {
+	NNI_ARG_UNUSED(arg);
 	nni_aio_finish_error(aio, NNG_ENOTSUP);
 }
 
diff --git a/src/protocol/pubsub0/pub.c b/src/protocol/pubsub0/pub.c
index 285f40ca..33ecb5ba 100644
--- a/src/protocol/pubsub0/pub.c
+++ b/src/protocol/pubsub0/pub.c
@@ -290,6 +290,7 @@ pub0_sock_getopt_raw(void *arg, void *buf, size_t *szp)
 static void
 pub0_sock_recv(void *arg, nni_aio *aio)
 {
+	NNI_ARG_UNUSED(arg);
 	nni_aio_finish_error(aio, NNG_ENOTSUP);
 }
 
diff --git a/src/protocol/pubsub0/sub.c b/src/protocol/pubsub0/sub.c
index a756e326..8803ab19 100644
--- a/src/protocol/pubsub0/sub.c
+++ b/src/protocol/pubsub0/sub.c
@@ -292,6 +292,7 @@ sub0_sock_getopt_raw(void *arg, void *buf, size_t *szp)
 static void
 sub0_sock_send(void *arg, nni_aio *aio)
 {
+	NNI_ARG_UNUSED(arg);
 	nni_aio_finish_error(aio, NNG_ENOTSUP);
 }
 
diff --git a/src/protocol/survey0/survey.c b/src/protocol/survey0/survey.c
index b8f10f0e..637ce2e2 100644
--- a/src/protocol/survey0/survey.c
+++ b/src/protocol/survey0/survey.c
@@ -474,6 +474,11 @@ static nni_proto_sock_option surv0_sock_options[] = {
 	    .pso_getopt = surv0_sock_getopt_surveytime,
 	    .pso_setopt = surv0_sock_setopt_surveytime,
 	},
+	{
+	    .pso_name   = NNG_OPT_MAXTTL,
+	    .pso_getopt = surv0_sock_getopt_maxttl,
+	    .pso_setopt = surv0_sock_setopt_maxttl,
+	},
 	// terminate list
 	{ NULL, NULL, NULL },
 };