Replace `NNG_OPT_PROTO`, `NNG_OPT_PROTONAME`, and friends with functions.

Socket options were a little awkward, and these are core properties
of the socket.  Few if any applications need these.  This also avoids
some dynamic allocations.

22 files changed, 221 insertions, 219 deletions

diff --git a/docs/ref/migrate/nanomsg.md b/docs/ref/migrate/nanomsg.md
index 8094c942..695f771b 100644
--- a/docs/ref/migrate/nanomsg.md
+++ b/docs/ref/migrate/nanomsg.md
@@ -66,24 +66,24 @@ NNG approach to messages. Likewise there is no `struct nn_cmsghdr` equivalent.
 
 The following options are changed.
 
-| Nanomsg Option         | NNG Eqvaivalent                | Notes                                                   |
-| ---------------------- | ------------------------------ | ------------------------------------------------------- |
-| `NN_LINGER`            | None                           | NNG does not support tuning this.                       |
-| `NN_SNDBUF`            | `NNG_OPT_SENDBUF`              | NNG value is given in messages, not bytes.              |
-| `NN_RCVBUF`            | `NNG_OPT_RECVBUF`              | NNG value is given in messages, not bytes.              |
-| `NN_SNDTIMEO`          | `NNG_OPT_SENDTIMEO`            |
-| `NN_RCVTIMEO`          | `NNG_OPT_RECVTIMEO`            |
-| `NN_RECONNECT_IVL`     | `NNG_OPT_RECONNMINT`           |
-| `NN_RECONNECT_IVL_MAX` | `NNG_OPT_RECONNMAXT`           |
-| `NN_SNDPRIO`           | None                           | Not supported in NNG yet.                               |
-| `NN_RCVPRIO`           | None                           | Not supported in NNG yet.                               |
-| `NN_RCVFD`             | `+nng_socket_get_recv_poll_fd` | No longer an option, use a function call.               |
-| `NN_SNDFD`             | `+nng_socket_get_send_poll_fd` | No longer an option, use a function call.               |
-| `NN_DOMAIN`            | None                           | NNG options are not divided by domain or protocol.      |
-| `NN_PROTOCOL`          | `NNG_OPT_PROTO`                | See also `NNG_OPT_PROTONAME`.                           |
-| `NN_IPV4ONLY`          | None                           | Use URL such as `tcp4://` to obtain this functionality. |
-| `NN_SOCKET_NAME`       | `NNG_OPT_SOCKNAME`             |
-| `NN_MAXTTL`            | `NNG_OPT_MAXTTL`               |
+| Nanomsg Option         | NNG Eqvaivalent               | Notes                                                   |
+| ---------------------- | ----------------------------- | ------------------------------------------------------- |
+| `NN_LINGER`            | None                          | NNG does not support tuning this.                       |
+| `NN_SNDBUF`            | `NNG_OPT_SENDBUF`             | NNG value is given in messages, not bytes.              |
+| `NN_RCVBUF`            | `NNG_OPT_RECVBUF`             | NNG value is given in messages, not bytes.              |
+| `NN_SNDTIMEO`          | `NNG_OPT_SENDTIMEO`           |
+| `NN_RCVTIMEO`          | `NNG_OPT_RECVTIMEO`           |
+| `NN_RECONNECT_IVL`     | `NNG_OPT_RECONNMINT`          |
+| `NN_RECONNECT_IVL_MAX` | `NNG_OPT_RECONNMAXT`          |
+| `NN_SNDPRIO`           | None                          | Not supported in NNG yet.                               |
+| `NN_RCVPRIO`           | None                          | Not supported in NNG yet.                               |
+| `NN_RCVFD`             | `nng_socket_get_recv_poll_fd` | No longer an option, use a function call.               |
+| `NN_SNDFD`             | `nng_socket_get_send_poll_fd` | No longer an option, use a function call.               |
+| `NN_DOMAIN`            | None                          | NNG options are not divided by domain or protocol.      |
+| `NN_PROTOCOL`          | `nng_socket_proto_id`         | No longer an option. See also `nng_socket_proto_name`.  |
+| `NN_IPV4ONLY`          | None                          | Use URL such as `tcp4://` to obtain this functionality. |
+| `NN_SOCKET_NAME`       | `NNG_OPT_SOCKNAME`            |
+| `NN_MAXTTL`            | `NNG_OPT_MAXTTL`              |
 
 ## Error Codes
 
diff --git a/docs/ref/migrate/nng1.md b/docs/ref/migrate/nng1.md
index 0e2c9a48..39968277 100644
--- a/docs/ref/migrate/nng1.md
+++ b/docs/ref/migrate/nng1.md
@@ -69,6 +69,15 @@ options must be set on the endpoint (dialer or listener) using the appropriate
 to allocate and configure the endpoint before attaching it to the socket. This will
 also afford a much more fine-grained level of control over transport options.
 
+## Socket Options
+
+The `NNG_OPT_PROTO`, `NNG_OPT_PROTONAME`, `NNG_OPT_PEER`, and `NNG_OPT_PEERNAME` options
+have been replaced by functions instead of options.
+Use `nng_socket_proto_id`, `nng_socket_peer_id`, `nng_socket_proto_name`, and `nng_socket_peer_name` instead.
+Note that the new functions provide a reference to a static string, and thus do not require
+allocation, and the returned strings should not be freed. Also the IDs are provided as `uint16_t`,
+matching the actual wire protocol values, instead of `int`.
+
 ## Statistics Use Constified Pointers
 
 A number of the statistics functions take, or return, `const nng_stat *` instead
diff --git a/include/nng/nng.h b/include/nng/nng.h
index ac82954a..d0e47829 100644
--- a/include/nng/nng.h
+++ b/include/nng/nng.h
@@ -264,6 +264,13 @@ NNG_DECL int nng_socket_get_ms(nng_socket, const char *, nng_duration *);
 NNG_DECL int nng_socket_get_recv_poll_fd(nng_socket id, int *fdp);
 NNG_DECL int nng_socket_get_send_poll_fd(nng_socket id, int *fdp);
 
+// These functions are used on a socket to get information about it's
+// identity, and the identity of the peer.  Few applications need these.
+NNG_DECL int nng_socket_proto_id(nng_socket id, uint16_t *idp);
+NNG_DECL int nng_socket_peer_id(nng_socket id, uint16_t *idp);
+NNG_DECL int nng_socket_proto_name(nng_socket id, const char **namep);
+NNG_DECL int nng_socket_peer_name(nng_socket id, const char **namep);
+
 // Utility function for getting a printable form of the socket address
 // for display in logs, etc.  It is not intended to be parsed, and the
 // display format may change without notice.  Generally you should alow
@@ -723,10 +730,6 @@ NNG_DECL nng_listener nng_pipe_listener(nng_pipe);
 // Options.
 #define NNG_OPT_SOCKNAME "socket-name"
 #define NNG_OPT_RAW "raw"
-#define NNG_OPT_PROTO "protocol"
-#define NNG_OPT_PROTONAME "protocol-name"
-#define NNG_OPT_PEER "peer"
-#define NNG_OPT_PEERNAME "peer-name"
 #define NNG_OPT_RECVBUF "recv-buffer"
 #define NNG_OPT_SENDBUF "send-buffer"
 #define NNG_OPT_RECVTIMEO "recv-timeout"
diff --git a/src/core/socket.c b/src/core/socket.c
index 9376f9de..0e9b6b17 100644
--- a/src/core/socket.c
+++ b/src/core/socket.c
@@ -227,30 +227,6 @@ sock_set_sockname(void *s, const void *buf, size_t sz, nni_type t)
 	return (rv);
 }
 
-static int
-sock_get_proto(void *s, void *buf, size_t *szp, nni_type t)
-{
-	return (nni_copyout_int(nni_sock_proto_id(SOCK(s)), buf, szp, t));
-}
-
-static int
-sock_get_peer(void *s, void *buf, size_t *szp, nni_type t)
-{
-	return (nni_copyout_int(nni_sock_peer_id(SOCK(s)), buf, szp, t));
-}
-
-static int
-sock_get_protoname(void *s, void *buf, size_t *szp, nni_type t)
-{
-	return (nni_copyout_str(nni_sock_proto_name(SOCK(s)), buf, szp, t));
-}
-
-static int
-sock_get_peername(void *s, void *buf, size_t *szp, nni_type t)
-{
-	return (nni_copyout_str(nni_sock_peer_name(SOCK(s)), buf, szp, t));
-}
-
 static const nni_option sock_options[] = {
 	{
 	    .o_name = NNG_OPT_RECVTIMEO,
@@ -281,22 +257,6 @@ static const nni_option sock_options[] = {
 	    .o_name = NNG_OPT_RAW,
 	    .o_get  = sock_get_raw,
 	},
-	{
-	    .o_name = NNG_OPT_PROTO,
-	    .o_get  = sock_get_proto,
-	},
-	{
-	    .o_name = NNG_OPT_PEER,
-	    .o_get  = sock_get_peer,
-	},
-	{
-	    .o_name = NNG_OPT_PROTONAME,
-	    .o_get  = sock_get_protoname,
-	},
-	{
-	    .o_name = NNG_OPT_PEERNAME,
-	    .o_get  = sock_get_peername,
-	},
 	// terminate list
 	{
 	    .o_name = NULL,
diff --git a/src/nng.c b/src/nng.c
index 1707ce9f..d5c1b957 100644
--- a/src/nng.c
+++ b/src/nng.c
@@ -1151,6 +1151,70 @@ nng_socket_get_send_poll_fd(nng_socket id, int *fdp)
 }
 
 int
+nng_socket_proto_id(nng_socket id, uint16_t *idp)
+{
+	int       rv;
+	nni_sock *sock;
+
+	if (((rv = nni_init()) != 0) ||
+	    ((rv = nni_sock_find(&sock, id.id)) != 0)) {
+		return (rv);
+	}
+
+	*idp = nni_sock_proto_id(sock);
+	nni_sock_rele(sock);
+	return (0);
+}
+
+int
+nng_socket_peer_id(nng_socket id, uint16_t *idp)
+{
+	int       rv;
+	nni_sock *sock;
+
+	if (((rv = nni_init()) != 0) ||
+	    ((rv = nni_sock_find(&sock, id.id)) != 0)) {
+		return (rv);
+	}
+
+	*idp = nni_sock_peer_id(sock);
+	nni_sock_rele(sock);
+	return (0);
+}
+
+int
+nng_socket_proto_name(nng_socket id, const char **name)
+{
+	int       rv;
+	nni_sock *sock;
+
+	if (((rv = nni_init()) != 0) ||
+	    ((rv = nni_sock_find(&sock, id.id)) != 0)) {
+		return (rv);
+	}
+
+	*name = nni_sock_proto_name(sock);
+	nni_sock_rele(sock);
+	return (0);
+}
+
+int
+nng_socket_peer_name(nng_socket id, const char **name)
+{
+	int       rv;
+	nni_sock *sock;
+
+	if (((rv = nni_init()) != 0) ||
+	    ((rv = nni_sock_find(&sock, id.id)) != 0)) {
+		return (rv);
+	}
+
+	*name = nni_sock_peer_name(sock);
+	nni_sock_rele(sock);
+	return (0);
+}
+
+int
 nng_pipe_notify(nng_socket s, nng_pipe_ev ev, nng_pipe_cb cb, void *arg)
 {
 	int       rv;
diff --git a/src/sp/protocol/bus0/bus_test.c b/src/sp/protocol/bus0/bus_test.c
index 7e049e34..7a9e4a8b 100644
--- a/src/sp/protocol/bus0/bus_test.c
+++ b/src/sp/protocol/bus0/bus_test.c
@@ -17,21 +17,19 @@
 void
 test_bus_identity(void)
 {
-	nng_socket s;
-	int        p;
-	char      *n;
+	nng_socket  s;
+	uint16_t    p;
+	const char *n;
 
 	NUTS_PASS(nng_bus0_open(&s));
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PROTO, &p));
+	NUTS_PASS(nng_socket_proto_id(s, &p));
 	NUTS_TRUE(p == NNG_BUS0_SELF);
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PEER, &p));
+	NUTS_PASS(nng_socket_peer_id(s, &p));
 	NUTS_TRUE(p == NNG_BUS0_PEER); // 49
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PROTONAME, &n));
+	NUTS_PASS(nng_socket_proto_name(s, &n));
 	NUTS_MATCH(n, NNG_BUS0_SELF_NAME);
-	nng_strfree(n);
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PEERNAME, &n));
+	NUTS_PASS(nng_socket_peer_name(s, &n));
 	NUTS_MATCH(n, NNG_BUS0_PEER_NAME);
-	nng_strfree(n);
 	NUTS_CLOSE(s);
 }
 
diff --git a/src/sp/protocol/pair0/pair0_test.c b/src/sp/protocol/pair0/pair0_test.c
index e2196479..0cdfb789 100644
--- a/src/sp/protocol/pair0/pair0_test.c
+++ b/src/sp/protocol/pair0/pair0_test.c
@@ -21,21 +21,19 @@
 static void
 test_identity(void)
 {
-	nng_socket s;
-	int        p;
-	char      *n;
+	nng_socket  s;
+	uint16_t    p;
+	const char *n;
 
 	NUTS_PASS(nng_pair0_open(&s));
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PROTO, &p));
+	NUTS_PASS(nng_socket_proto_id(s, &p));
 	NUTS_TRUE(p == NUTS_PROTO(1u, 0u)); // 16
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PEER, &p));
+	NUTS_PASS(nng_socket_peer_id(s, &p));
 	NUTS_TRUE(p == NUTS_PROTO(1u, 0u)); // 17
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PROTONAME, &n));
+	NUTS_PASS(nng_socket_proto_name(s, &n));
 	NUTS_MATCH(n, "pair");
-	nng_strfree(n);
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PEERNAME, &n));
+	NUTS_PASS(nng_socket_peer_name(s, &n));
 	NUTS_MATCH(n, "pair");
-	nng_strfree(n);
 	NUTS_CLOSE(s);
 }
 
diff --git a/src/sp/protocol/pair1/pair1_poly_test.c b/src/sp/protocol/pair1/pair1_poly_test.c
index 895dd935..acd7f44d 100644
--- a/src/sp/protocol/pair1/pair1_poly_test.c
+++ b/src/sp/protocol/pair1/pair1_poly_test.c
@@ -20,21 +20,19 @@
 static void
 test_poly_identity(void)
 {
-	nng_socket s;
-	int        p;
-	char      *n;
+	nng_socket  s;
+	uint16_t    p;
+	const char *n;
 
 	NUTS_PASS(nng_pair1_open_poly(&s));
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PROTO, &p));
+	NUTS_PASS(nng_socket_proto_id(s, &p));
 	NUTS_TRUE(p == NUTS_PROTO(1u, 1u)); // 32
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PEER, &p));
+	NUTS_PASS(nng_socket_peer_id(s, &p));
 	NUTS_TRUE(p == NUTS_PROTO(1u, 1u)); // 33
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PROTONAME, &n));
+	NUTS_PASS(nng_socket_proto_name(s, &n));
 	NUTS_MATCH(n, "pair1");
-	nng_strfree(n);
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PEERNAME, &n));
+	NUTS_PASS(nng_socket_peer_name(s, &n));
 	NUTS_MATCH(n, "pair1");
-	nng_strfree(n);
 	NUTS_CLOSE(s);
 }
 
diff --git a/src/sp/protocol/pair1/pair1_test.c b/src/sp/protocol/pair1/pair1_test.c
index b6bbee1a..e0e6b3b2 100644
--- a/src/sp/protocol/pair1/pair1_test.c
+++ b/src/sp/protocol/pair1/pair1_test.c
@@ -21,21 +21,19 @@
 static void
 test_mono_identity(void)
 {
-	nng_socket s;
-	int        p;
-	char      *n;
+	nng_socket  s;
+	uint16_t    p;
+	const char *n;
 
 	NUTS_PASS(nng_pair1_open(&s));
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PROTO, &p));
+	NUTS_PASS(nng_socket_proto_id(s, &p));
 	NUTS_TRUE(p == NUTS_PROTO(1u, 1u)); // 32
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PEER, &p));
+	NUTS_PASS(nng_socket_peer_id(s, &p));
 	NUTS_TRUE(p == NUTS_PROTO(1u, 1u)); // 33
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PROTONAME, &n));
+	NUTS_PASS(nng_socket_proto_name(s, &n));
 	NUTS_MATCH(n, "pair1");
-	nng_strfree(n);
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PEERNAME, &n));
+	NUTS_PASS(nng_socket_peer_name(s, &n));
 	NUTS_MATCH(n, "pair1");
-	nng_strfree(n);
 	NUTS_CLOSE(s);
 }
 
diff --git a/src/sp/protocol/pipeline0/pull_test.c b/src/sp/protocol/pipeline0/pull_test.c
index 6be5c2f5..59dcf8a8 100644
--- a/src/sp/protocol/pipeline0/pull_test.c
+++ b/src/sp/protocol/pipeline0/pull_test.c
@@ -13,21 +13,19 @@
 static void
 test_pull_identity(void)
 {
-	nng_socket s;
-	int        p;
-	char      *n;
+	nng_socket  s;
+	uint16_t    p;
+	const char *n;
 
 	NUTS_PASS(nng_pull0_open(&s));
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PROTO, &p));
+	NUTS_PASS(nng_socket_proto_id(s, &p));
 	NUTS_TRUE(p == NUTS_PROTO(5u, 1u)); // 81
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PEER, &p));
+	NUTS_PASS(nng_socket_peer_id(s, &p));
 	NUTS_TRUE(p == NUTS_PROTO(5u, 0u)); // 80
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PROTONAME, &n));
+	NUTS_PASS(nng_socket_proto_name(s, &n));
 	NUTS_MATCH(n, "pull");
-	nng_strfree(n);
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PEERNAME, &n));
+	NUTS_PASS(nng_socket_peer_name(s, &n));
 	NUTS_MATCH(n, "push");
-	nng_strfree(n);
 	NUTS_CLOSE(s);
 }
 
diff --git a/src/sp/protocol/pipeline0/push_test.c b/src/sp/protocol/pipeline0/push_test.c
index 249c62a9..be60ba50 100644
--- a/src/sp/protocol/pipeline0/push_test.c
+++ b/src/sp/protocol/pipeline0/push_test.c
@@ -13,21 +13,19 @@
 static void
 test_push_identity(void)
 {
-	nng_socket s;
-	int        p;
-	char      *n;
+	nng_socket  s;
+	uint16_t    p;
+	const char *n;
 
 	NUTS_PASS(nng_push0_open(&s));
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PROTO, &p));
+	NUTS_PASS(nng_socket_proto_id(s, &p));
 	NUTS_TRUE(p == NUTS_PROTO(5u, 0u)); // 80
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PEER, &p));
+	NUTS_PASS(nng_socket_peer_id(s, &p));
 	NUTS_TRUE(p == NUTS_PROTO(5u, 1u)); // 81
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PROTONAME, &n));
+	NUTS_PASS(nng_socket_proto_name(s, &n));
 	NUTS_MATCH(n, "push");
-	nng_strfree(n);
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PEERNAME, &n));
+	NUTS_PASS(nng_socket_peer_name(s, &n));
 	NUTS_MATCH(n, "pull");
-	nng_strfree(n);
 	NUTS_CLOSE(s);
 }
 
diff --git a/src/sp/protocol/pubsub0/pub_test.c b/src/sp/protocol/pubsub0/pub_test.c
index 4be4b06f..5f0ef01e 100644
--- a/src/sp/protocol/pubsub0/pub_test.c
+++ b/src/sp/protocol/pubsub0/pub_test.c
@@ -13,21 +13,19 @@
 static void
 test_pub_identity(void)
 {
-	nng_socket s;
-	int        p;
-	char      *n;
+	nng_socket  s;
+	uint16_t    p;
+	const char *n;
 
 	NUTS_PASS(nng_pub0_open(&s));
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PROTO, &p));
+	NUTS_PASS(nng_socket_proto_id(s, &p));
 	NUTS_TRUE(p == NUTS_PROTO(2u, 0u)); // 32
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PEER, &p));
+	NUTS_PASS(nng_socket_peer_id(s, &p));
 	NUTS_TRUE(p == NUTS_PROTO(2u, 1u)); // 33
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PROTONAME, &n));
+	NUTS_PASS(nng_socket_proto_name(s, &n));
 	NUTS_MATCH(n, "pub");
-	nng_strfree(n);
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PEERNAME, &n));
+	NUTS_PASS(nng_socket_peer_name(s, &n));
 	NUTS_MATCH(n, "sub");
-	nng_strfree(n);
 	NUTS_CLOSE(s);
 }
 
diff --git a/src/sp/protocol/pubsub0/sub_test.c b/src/sp/protocol/pubsub0/sub_test.c
index ef38042a..b823d486 100644
--- a/src/sp/protocol/pubsub0/sub_test.c
+++ b/src/sp/protocol/pubsub0/sub_test.c
@@ -13,21 +13,19 @@
 static void
 test_sub_identity(void)
 {
-	nng_socket s;
-	int        p;
-	char      *n;
+	nng_socket  s;
+	uint16_t    p;
+	const char *n;
 
 	NUTS_PASS(nng_sub0_open(&s));
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PROTO, &p));
+	NUTS_PASS(nng_socket_proto_id(s, &p));
 	NUTS_TRUE(p == NUTS_PROTO(2u, 1u)); // 33
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PEER, &p));
+	NUTS_PASS(nng_socket_peer_id(s, &p));
 	NUTS_TRUE(p == NUTS_PROTO(2u, 0u)); // 32
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PROTONAME, &n));
+	NUTS_PASS(nng_socket_proto_name(s, &n));
 	NUTS_MATCH(n, "sub");
-	nng_strfree(n);
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PEERNAME, &n));
+	NUTS_PASS(nng_socket_peer_name(s, &n));
 	NUTS_MATCH(n, "pub");
-	nng_strfree(n);
 	NUTS_CLOSE(s);
 }
 
diff --git a/src/sp/protocol/pubsub0/xsub_test.c b/src/sp/protocol/pubsub0/xsub_test.c
index b8f303f3..8e5568c4 100644
--- a/src/sp/protocol/pubsub0/xsub_test.c
+++ b/src/sp/protocol/pubsub0/xsub_test.c
@@ -13,21 +13,19 @@
 static void
 test_xsub_identity(void)
 {
-	nng_socket s;
-	int        p;
-	char      *n;
+	nng_socket  s;
+	uint16_t    p;
+	const char *n;
 
 	NUTS_PASS(nng_sub0_open_raw(&s));
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PROTO, &p));
+	NUTS_PASS(nng_socket_proto_id(s, &p));
 	NUTS_TRUE(p == NUTS_PROTO(2u, 1u)); // 33
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PEER, &p));
+	NUTS_PASS(nng_socket_peer_id(s, &p));
 	NUTS_TRUE(p == NUTS_PROTO(2u, 0u)); // 32
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PROTONAME, &n));
+	NUTS_PASS(nng_socket_proto_name(s, &n));
 	NUTS_MATCH(n, "sub");
-	nng_strfree(n);
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PEERNAME, &n));
+	NUTS_PASS(nng_socket_peer_name(s, &n));
 	NUTS_MATCH(n, "pub");
-	nng_strfree(n);
 	NUTS_CLOSE(s);
 }
 
diff --git a/src/sp/protocol/reqrep0/rep_test.c b/src/sp/protocol/reqrep0/rep_test.c
index 58a54afe..6ca8fbca 100644
--- a/src/sp/protocol/reqrep0/rep_test.c
+++ b/src/sp/protocol/reqrep0/rep_test.c
@@ -13,23 +13,21 @@
 static void
 test_rep_identity(void)
 {
-	nng_socket s;
-	int        p1, p2;
-	char      *n1;
-	char      *n2;
+	nng_socket  s;
+	uint16_t    p1, p2;
+	const char *n1;
+	const char *n2;
 
 	NUTS_PASS(nng_rep0_open(&s));
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PROTO, &p1));
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PEER, &p2));
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PROTONAME, &n1));
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PEERNAME, &n2));
+	NUTS_PASS(nng_socket_proto_id(s, &p1));
+	NUTS_PASS(nng_socket_peer_id(s, &p2));
+	NUTS_PASS(nng_socket_proto_name(s, &n1));
+	NUTS_PASS(nng_socket_peer_name(s, &n2));
 	NUTS_CLOSE(s);
 	NUTS_TRUE(p1 == NNG_REP0_SELF);
 	NUTS_TRUE(p2 == NNG_REP0_PEER);
 	NUTS_MATCH(n1, NNG_REP0_SELF_NAME);
 	NUTS_MATCH(n2, NNG_REP0_PEER_NAME);
-	nng_strfree(n1);
-	nng_strfree(n2);
 }
 
 void
diff --git a/src/sp/protocol/reqrep0/req_test.c b/src/sp/protocol/reqrep0/req_test.c
index 61d9b347..08b40b08 100644
--- a/src/sp/protocol/reqrep0/req_test.c
+++ b/src/sp/protocol/reqrep0/req_test.c
@@ -14,21 +14,19 @@
 static void
 test_req_identity(void)
 {
-	nng_socket s;
-	int        p;
-	char      *n;
+	nng_socket  s;
+	uint16_t    p;
+	const char *n;
 
 	NUTS_PASS(nng_req0_open(&s));
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PROTO, &p));
+	NUTS_PASS(nng_socket_proto_id(s, &p));
 	NUTS_TRUE(p == NNG_REQ0_SELF);
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PEER, &p));
+	NUTS_PASS(nng_socket_peer_id(s, &p));
 	NUTS_TRUE(p == NNG_REQ0_PEER); // 49
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PROTONAME, &n));
+	NUTS_PASS(nng_socket_proto_name(s, &n));
 	NUTS_MATCH(n, NNG_REQ0_SELF_NAME);
-	nng_strfree(n);
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PEERNAME, &n));
+	NUTS_PASS(nng_socket_peer_name(s, &n));
 	NUTS_MATCH(n, NNG_REQ0_PEER_NAME);
-	nng_strfree(n);
 	NUTS_CLOSE(s);
 }
 
diff --git a/src/sp/protocol/reqrep0/xrep_test.c b/src/sp/protocol/reqrep0/xrep_test.c
index 67e38449..c1a7cb62 100644
--- a/src/sp/protocol/reqrep0/xrep_test.c
+++ b/src/sp/protocol/reqrep0/xrep_test.c
@@ -13,23 +13,21 @@
 static void
 test_xrep_identity(void)
 {
-	nng_socket s;
-	int        p1, p2;
-	char      *n1;
-	char      *n2;
+	nng_socket  s;
+	uint16_t    p1, p2;
+	const char *n1;
+	const char *n2;
 
 	NUTS_PASS(nng_rep0_open_raw(&s));
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PROTO, &p1));
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PEER, &p2));
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PROTONAME, &n1));
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PEERNAME, &n2));
+	NUTS_PASS(nng_socket_proto_id(s, &p1));
+	NUTS_PASS(nng_socket_peer_id(s, &p2));
+	NUTS_PASS(nng_socket_proto_name(s, &n1));
+	NUTS_PASS(nng_socket_peer_name(s, &n2));
 	NUTS_CLOSE(s);
 	NUTS_TRUE(p1 == NNG_REP0_SELF);
 	NUTS_TRUE(p2 == NNG_REP0_PEER);
 	NUTS_MATCH(n1, NNG_REP0_SELF_NAME);
 	NUTS_MATCH(n2, NNG_REP0_PEER_NAME);
-	nng_strfree(n1);
-	nng_strfree(n2);
 }
 
 static void
diff --git a/src/sp/protocol/reqrep0/xreq_test.c b/src/sp/protocol/reqrep0/xreq_test.c
index 3ebe92da..7e09ce5a 100644
--- a/src/sp/protocol/reqrep0/xreq_test.c
+++ b/src/sp/protocol/reqrep0/xreq_test.c
@@ -13,23 +13,21 @@
 static void
 test_xreq_identity(void)
 {
-	nng_socket s;
-	int        p1, p2;
-	char      *n1;
-	char      *n2;
+	nng_socket  s;
+	uint16_t    p1, p2;
+	const char *n1;
+	const char *n2;
 
 	NUTS_PASS(nng_req0_open_raw(&s));
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PROTO, &p1));
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PEER, &p2));
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PROTONAME, &n1));
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PEERNAME, &n2));
+	NUTS_PASS(nng_socket_proto_id(s, &p1));
+	NUTS_PASS(nng_socket_peer_id(s, &p2));
+	NUTS_PASS(nng_socket_proto_name(s, &n1));
+	NUTS_PASS(nng_socket_peer_name(s, &n2));
 	NUTS_CLOSE(s);
 	NUTS_TRUE(p1 == NNG_REQ0_SELF);
 	NUTS_TRUE(p2 == NNG_REQ0_PEER);
 	NUTS_MATCH(n1, NNG_REQ0_SELF_NAME);
 	NUTS_MATCH(n2, NNG_REQ0_PEER_NAME);
-	nng_strfree(n1);
-	nng_strfree(n2);
 }
 
 static void
diff --git a/src/sp/protocol/survey0/respond_test.c b/src/sp/protocol/survey0/respond_test.c
index 0dad2222..5e3dad34 100644
--- a/src/sp/protocol/survey0/respond_test.c
+++ b/src/sp/protocol/survey0/respond_test.c
@@ -13,21 +13,19 @@
 void
 test_resp_identity(void)
 {
-	nng_socket s;
-	int        p;
-	char      *n;
+	nng_socket  s;
+	uint16_t    p;
+	const char *n;
 
 	NUTS_PASS(nng_respondent0_open(&s));
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PROTO, &p));
+	NUTS_PASS(nng_socket_proto_id(s, &p));
 	NUTS_TRUE(p == NNG_RESPONDENT0_SELF);
-	NUTS_TRUE(nng_socket_get_int(s, NNG_OPT_PEER, &p) == 0);
+	NUTS_TRUE(nng_socket_peer_id(s, &p) == 0);
 	NUTS_TRUE(p == NNG_RESPONDENT0_PEER);
-	NUTS_TRUE(nng_socket_get_string(s, NNG_OPT_PROTONAME, &n) == 0);
+	NUTS_TRUE(nng_socket_proto_name(s, &n) == 0);
 	NUTS_MATCH(n, NNG_RESPONDENT0_SELF_NAME);
-	nng_strfree(n);
-	NUTS_TRUE(nng_socket_get_string(s, NNG_OPT_PEERNAME, &n) == 0);
+	NUTS_TRUE(nng_socket_peer_name(s, &n) == 0);
 	NUTS_MATCH(n, NNG_RESPONDENT0_PEER_NAME);
-	nng_strfree(n);
 	NUTS_CLOSE(s);
 }
 
diff --git a/src/sp/protocol/survey0/survey_test.c b/src/sp/protocol/survey0/survey_test.c
index 76fe138d..e860dc14 100644
--- a/src/sp/protocol/survey0/survey_test.c
+++ b/src/sp/protocol/survey0/survey_test.c
@@ -14,21 +14,19 @@
 static void
 test_surv_identity(void)
 {
-	nng_socket s;
-	int        p;
-	char      *n;
+	nng_socket  s;
+	uint16_t    p;
+	const char *n;
 
 	NUTS_PASS(nng_surveyor0_open(&s));
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PROTO, &p));
+	NUTS_PASS(nng_socket_proto_id(s, &p));
 	NUTS_TRUE(p == NNG_SURVEYOR0_SELF);
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PEER, &p));
+	NUTS_PASS(nng_socket_peer_id(s, &p));
 	NUTS_TRUE(p == NNG_SURVEYOR0_PEER); // 49
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PROTONAME, &n));
+	NUTS_PASS(nng_socket_proto_name(s, &n));
 	NUTS_MATCH(n, NNG_SURVEYOR0_SELF_NAME);
-	nng_strfree(n);
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PEERNAME, &n));
+	NUTS_PASS(nng_socket_peer_name(s, &n));
 	NUTS_MATCH(n, NNG_SURVEYOR0_PEER_NAME);
-	nng_strfree(n);
 	NUTS_CLOSE(s);
 }
 
diff --git a/src/sp/protocol/survey0/xrespond_test.c b/src/sp/protocol/survey0/xrespond_test.c
index 8b8787f9..1522d1ed 100644
--- a/src/sp/protocol/survey0/xrespond_test.c
+++ b/src/sp/protocol/survey0/xrespond_test.c
@@ -13,23 +13,21 @@
 static void
 test_xresp_identity(void)
 {
-	nng_socket s;
-	int        p1, p2;
-	char      *n1;
-	char      *n2;
+	nng_socket  s;
+	uint16_t    p1, p2;
+	const char *n1;
+	const char *n2;
 
 	NUTS_PASS(nng_respondent0_open_raw(&s));
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PROTO, &p1));
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PEER, &p2));
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PROTONAME, &n1));
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PEERNAME, &n2));
+	NUTS_PASS(nng_socket_proto_id(s, &p1));
+	NUTS_PASS(nng_socket_peer_id(s, &p2));
+	NUTS_PASS(nng_socket_proto_name(s, &n1));
+	NUTS_PASS(nng_socket_peer_name(s, &n2));
 	NUTS_CLOSE(s);
 	NUTS_TRUE(p1 == NNG_RESPONDENT0_SELF);
 	NUTS_TRUE(p2 == NNG_RESPONDENT0_PEER);
 	NUTS_MATCH(n1, NNG_RESPONDENT0_SELF_NAME);
 	NUTS_MATCH(n2, NNG_RESPONDENT0_PEER_NAME);
-	nng_strfree(n1);
-	nng_strfree(n2);
 }
 
 static void
diff --git a/src/sp/protocol/survey0/xsurvey_test.c b/src/sp/protocol/survey0/xsurvey_test.c
index efa54101..41c76cb2 100644
--- a/src/sp/protocol/survey0/xsurvey_test.c
+++ b/src/sp/protocol/survey0/xsurvey_test.c
@@ -13,21 +13,19 @@
 static void
 test_xsurveyor_identity(void)
 {
-	nng_socket s;
-	int        p;
-	char      *n;
+	nng_socket  s;
+	uint16_t    p;
+	const char *n;
 
 	NUTS_PASS(nng_surveyor0_open_raw(&s));
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PROTO, &p));
+	NUTS_PASS(nng_socket_proto_id(s, &p));
 	NUTS_TRUE(p == NNG_SURVEYOR0_SELF); // 0x62
-	NUTS_PASS(nng_socket_get_int(s, NNG_OPT_PEER, &p));
+	NUTS_PASS(nng_socket_peer_id(s, &p));
 	NUTS_TRUE(p == NNG_SURVEYOR0_PEER); // 0x62
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PROTONAME, &n));
+	NUTS_PASS(nng_socket_proto_name(s, &n));
 	NUTS_MATCH(n, NNG_SURVEYOR0_SELF_NAME);
-	nng_strfree(n);
-	NUTS_PASS(nng_socket_get_string(s, NNG_OPT_PEERNAME, &n));
+	NUTS_PASS(nng_socket_peer_name(s, &n));
 	NUTS_MATCH(n, NNG_SURVEYOR0_PEER_NAME);
-	nng_strfree(n);
 	NUTS_CLOSE(s);
 }