More nng_err -- this time for dialer and listener allocations.

21 files changed, 95 insertions, 94 deletions

diff --git a/src/core/platform.h b/src/core/platform.h
index 3b6f4db5..a13ae9f2 100644
--- a/src/core/platform.h
+++ b/src/core/platform.h
@@ -340,8 +340,8 @@ typedef struct nni_ipc_listener nni_ipc_listener;
 // IPC is so different from platform to platform.  The following should
 // be implemented.  If IPC isn't supported, all of these functions should
 // be stubs that just return NNG_ENOTSUP.
-extern int nni_ipc_dialer_alloc(nng_stream_dialer **, const nng_url *);
-extern int nni_ipc_listener_alloc(nng_stream_listener **, const nng_url *);
+extern nng_err nni_ipc_dialer_alloc(nng_stream_dialer **, const nng_url *);
+extern nng_err nni_ipc_listener_alloc(nng_stream_listener **, const nng_url *);
 
 //
 // UDP support. UDP is not connection oriented, and only has the notion
diff --git a/src/core/sockfd.c b/src/core/sockfd.c
index 758cb755..f67ab64f 100644
--- a/src/core/sockfd.c
+++ b/src/core/sockfd.c
@@ -1,5 +1,5 @@
 //
-// Copyright 2024 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2025 Staysail Systems, Inc. <info@staysail.tech>
 //
 // This software is supplied under the terms of the MIT License, a
 // copy of which should be located in the distribution where this
@@ -20,7 +20,7 @@
 // accept is performed, then another slot is available.
 #define NNG_SFD_LISTEN_QUEUE 16
 
-int
+nng_err
 nni_sfd_dialer_alloc(nng_stream_dialer **dp, const nng_url *url)
 {
 	NNI_ARG_UNUSED(dp);
@@ -81,7 +81,7 @@ static void
 sfd_start_conn(sfd_listener *l, nni_aio *aio)
 {
 	int           fd;
-	int           rv;
+	nng_err       rv;
 	nni_sfd_conn *c;
 	NNI_ASSERT(l->listen_cnt > 0);
 	fd = l->listen_q[0];
@@ -209,7 +209,7 @@ sfd_listener_set(
 	return (nni_setopt(sfd_listener_options, name, l, buf, sz, t));
 }
 
-int
+nng_err
 nni_sfd_listener_alloc(nng_stream_listener **lp, const nng_url *url)
 {
 	sfd_listener *l;
@@ -233,5 +233,5 @@ nni_sfd_listener_alloc(nng_stream_listener **lp, const nng_url *url)
 	l->ops.sl_set    = sfd_listener_set;
 
 	*lp = (void *) l;
-	return (0);
+	return (NNG_OK);
 }
diff --git a/src/core/sockfd.h b/src/core/sockfd.h
index ca37f0e1..8985c009 100644
--- a/src/core/sockfd.h
+++ b/src/core/sockfd.h
@@ -1,5 +1,5 @@
 //
-// Copyright 2023 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2025 Staysail Systems, Inc. <info@staysail.tech>
 //
 // This software is supplied under the terms of the MIT License, a
 // copy of which should be located in the distribution where this
@@ -16,9 +16,9 @@
 // an arbitrary byte stream file descriptor (UNIX) or handle (Windows)
 // with a nng_stream.
 typedef struct nni_sfd_conn nni_sfd_conn;
-extern int nni_sfd_conn_alloc(nni_sfd_conn **cp, int fd);
-extern int nni_sfd_dialer_alloc(nng_stream_dialer **, const nng_url *);
-extern int nni_sfd_listener_alloc(nng_stream_listener **, const nng_url *);
+extern nng_err              nni_sfd_conn_alloc(nni_sfd_conn **cp, int fd);
+extern nng_err nni_sfd_dialer_alloc(nng_stream_dialer **, const nng_url *);
+extern nng_err nni_sfd_listener_alloc(nng_stream_listener **, const nng_url *);
 
 // this is used to close a file descriptor, in case we cannot
 // create a connection (or if the listener is closed before the
diff --git a/src/core/stream.c b/src/core/stream.c
index 1af8e572..d8111c7a 100644
--- a/src/core/stream.c
+++ b/src/core/stream.c
@@ -21,8 +21,8 @@
 
 static struct {
 	const char *scheme;
-	int (*dialer_alloc)(nng_stream_dialer **, const nng_url *);
-	int (*listener_alloc)(nng_stream_listener **, const nng_url *);
+	nng_err (*dialer_alloc)(nng_stream_dialer **, const nng_url *);
+	nng_err (*listener_alloc)(nng_stream_listener **, const nng_url *);
 
 } stream_drivers[] = {
 	{
diff --git a/src/core/tcp.c b/src/core/tcp.c
index f7a30ed2..2017452b 100644
--- a/src/core/tcp.c
+++ b/src/core/tcp.c
@@ -219,10 +219,10 @@ tcp_dialer_set(
 	return (nni_tcp_dialer_set(d->d, name, buf, sz, t));
 }
 
-static int
+static nng_err
 tcp_dialer_alloc(tcp_dialer **dp)
 {
-	int         rv;
+	nng_err     rv;
 	tcp_dialer *d;
 
 	if ((d = NNI_ALLOC_STRUCT(d)) == NULL) {
@@ -234,7 +234,7 @@ tcp_dialer_alloc(tcp_dialer **dp)
 	nni_aio_init(&d->resaio, tcp_dial_res_cb, d);
 	nni_aio_init(&d->conaio, tcp_dial_con_cb, d);
 
-	if ((rv = nni_tcp_dialer_init(&d->d)) != 0) {
+	if ((rv = nni_tcp_dialer_init(&d->d)) != NNG_OK) {
 		tcp_dialer_free(d);
 		return (rv);
 	}
@@ -247,16 +247,16 @@ tcp_dialer_alloc(tcp_dialer **dp)
 	d->ops.sd_set   = tcp_dialer_set;
 
 	*dp = d;
-	return (0);
+	return (NNG_OK);
 }
 
-int
+nng_err
 nni_tcp_dialer_alloc(nng_stream_dialer **dp, const nng_url *url)
 {
 	tcp_dialer *d;
 	int         rv;
 
-	if ((rv = tcp_dialer_alloc(&d)) != 0) {
+	if ((rv = tcp_dialer_alloc(&d)) != NNG_OK) {
 		return (rv);
 	}
 
@@ -279,5 +279,5 @@ nni_tcp_dialer_alloc(nng_stream_dialer **dp, const nng_url *url)
 	d->port = url->u_port;
 
 	*dp = (void *) d;
-	return (0);
+	return (NNG_OK);
 }
diff --git a/src/core/tcp.h b/src/core/tcp.h
index 6e1829dc..cc41dfac 100644
--- a/src/core/tcp.h
+++ b/src/core/tcp.h
@@ -1,5 +1,5 @@
 //
-// Copyright 2020 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2025 Staysail Systems, Inc. <info@staysail.tech>
 //
 // This software is supplied under the terms of the MIT License, a
 // copy of which should be located in the distribution where this
@@ -15,7 +15,7 @@
 // These are interfaces we use for TCP internally.  These are not exposed
 // to the public API.
 
-extern int nni_tcp_dialer_alloc(nng_stream_dialer **, const nng_url *);
-extern int nni_tcp_listener_alloc(nng_stream_listener **, const nng_url *);
+extern nng_err nni_tcp_dialer_alloc(nng_stream_dialer **, const nng_url *);
+extern nng_err nni_tcp_listener_alloc(nng_stream_listener **, const nng_url *);
 
 #endif // CORE_TCP_H
diff --git a/src/core/url.c b/src/core/url.c
index 9ee8c9a9..9db92992 100644
--- a/src/core/url.c
+++ b/src/core/url.c
@@ -1,5 +1,5 @@
 //
-// Copyright 2024 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2025 Staysail Systems, Inc. <info@staysail.tech>
 // Copyright 2018 Capitar IT Group BV <info@capitar.com>
 //
 // This software is supplied under the terms of the MIT License, a
@@ -39,7 +39,7 @@ url_hex_val(char c)
 // is malformed UTF-8.  We consider UTF-8 malformed when the sequence
 // is an invalid code point, not the shortest possible code point, or
 // incomplete.
-static int
+static nng_err
 url_utf8_validate(void *arg)
 {
 	uint8_t *s = arg;
@@ -88,7 +88,7 @@ url_utf8_validate(void *arg)
 			return (NNG_EINVAL);
 		}
 	}
-	return (0);
+	return (NNG_OK);
 }
 
 size_t
@@ -119,7 +119,7 @@ nni_url_decode(uint8_t *out, const char *in, size_t max_len)
 	return (len);
 }
 
-int
+nng_err
 nni_url_canonify_uri(char *out)
 {
 	size_t  src, dst;
@@ -217,11 +217,11 @@ nni_url_canonify_uri(char *out)
 
 	// Finally lets make sure that the results are valid UTF-8.
 	// This guards against using UTF-8 redundancy to break security.
-	if ((rv = url_utf8_validate(out)) != 0) {
+	if ((rv = url_utf8_validate(out)) != NNG_OK) {
 		return (rv);
 	}
 
-	return (0);
+	return (NNG_OK);
 }
 
 static struct {
@@ -325,7 +325,7 @@ nni_url_default_port(const char *scheme)
 // Nanomsg URLs are always of the first form, we always require a
 // scheme with a leading //, such as http:// or tcp://. So our parser
 // is a bit more restricted, but sufficient for our needs.
-static int
+static nng_err
 nni_url_parse_inline_inner(nng_url *url, const char *raw)
 {
 	size_t      len;
@@ -392,7 +392,7 @@ nni_url_parse_inline_inner(nng_url *url, const char *raw)
 		url->u_query    = NULL;
 		url->u_fragment = NULL;
 		url->u_userinfo = NULL;
-		return (0);
+		return (NNG_OK);
 	}
 
 	// Look for host part (including colon).  Will be terminated by
@@ -504,24 +504,24 @@ nni_url_parse_inline_inner(nng_url *url, const char *raw)
 		url->u_port = nni_url_default_port(url->u_scheme);
 	}
 
-	return (0);
+	return (NNG_OK);
 }
 
-int
+nng_err
 nni_url_parse_inline(nng_url *url, const char *raw)
 {
-	int rv = nni_url_parse_inline_inner(url, raw);
-	if (rv != 0) {
+	nng_err rv = nni_url_parse_inline_inner(url, raw);
+	if (rv != NNG_OK) {
 		nni_url_fini(url);
 	}
 	return (rv);
 }
 
-int
+nng_err
 nng_url_parse(nng_url **urlp, const char *raw)
 {
 	nng_url *url;
-	int      rv;
+	nng_err  rv;
 
 	if ((url = NNI_ALLOC_STRUCT(url)) == NULL) {
 		return (NNG_ENOMEM);
@@ -531,7 +531,7 @@ nng_url_parse(nng_url **urlp, const char *raw)
 		return (rv);
 	}
 	*urlp = url;
-	return (0);
+	return (NNG_OK);
 }
 
 void
@@ -590,7 +590,7 @@ nng_url_sprintf(char *str, size_t size, const nng_url *url)
 	    url->u_fragment != NULL ? url->u_fragment : ""));
 }
 
-int
+nng_err
 nni_url_asprintf(char **str, const nng_url *url)
 {
 	char  *result;
@@ -602,13 +602,13 @@ nni_url_asprintf(char **str, const nng_url *url)
 	}
 	nng_url_sprintf(result, sz, url);
 	*str = result;
-	return (0);
+	return (NNG_OK);
 }
 
 // nni_url_asprintf_port is like nni_url_asprintf, but includes a port
 // override.  If non-zero, this port number replaces the port number
 // in the port string.
-int
+nng_err
 nni_url_asprintf_port(char **str, const nng_url *url, int port)
 {
 	nng_url myurl = *url;
@@ -621,7 +621,7 @@ nni_url_asprintf_port(char **str, const nng_url *url, int port)
 
 #define URL_COPYSTR(d, s) ((s != NULL) && ((d = nni_strdup(s)) == NULL))
 
-int
+nng_err
 nni_url_clone_inline(nng_url *dst, const nng_url *src)
 {
 	if (src->u_bufsz != 0) {
@@ -652,36 +652,36 @@ nni_url_clone_inline(nng_url *dst, const nng_url *src)
 	}
 	dst->u_scheme = src->u_scheme;
 	dst->u_port   = src->u_port;
-	return (0);
+	return (NNG_OK);
 }
 
 #undef URL_COPYSTR
 
-int
+nng_err
 nng_url_clone(nng_url **dstp, const nng_url *src)
 {
 	nng_url *dst;
-	int      rv;
+	nng_err  rv;
 	if ((dst = NNI_ALLOC_STRUCT(dst)) == NULL) {
 		return (NNG_ENOMEM);
 	}
-	if ((rv = nni_url_clone_inline(dst, src) != 0)) {
+	if ((rv = nni_url_clone_inline(dst, src) != NNG_OK)) {
 		NNI_FREE_STRUCT(dst);
 		return (rv);
 	}
 	*dstp = dst;
-	return (0);
+	return (NNG_OK);
 }
 
 // nni_url_to_address resolves a URL into a sockaddr, assuming the URL is for
 // an IP address.
-int
+nng_err
 nni_url_to_address(nng_sockaddr *sa, const nng_url *url)
 {
 	int             af;
 	nni_aio         aio;
 	const char     *h;
-	int             rv;
+	nng_err         rv;
 	nni_resolv_item ri;
 
 	// This assumes the scheme is one that uses TCP/IP addresses.
diff --git a/src/core/url.h b/src/core/url.h
index c74749c6..4f387c5d 100644
--- a/src/core/url.h
+++ b/src/core/url.h
@@ -28,13 +28,13 @@ struct nng_url {
 };
 
 extern uint16_t nni_url_default_port(const char *);
-extern int      nni_url_asprintf(char **, const nng_url *);
-extern int      nni_url_asprintf_port(char **, const nng_url *, int);
+extern nng_err  nni_url_asprintf(char **, const nng_url *);
+extern nng_err  nni_url_asprintf_port(char **, const nng_url *, int);
 extern size_t   nni_url_decode(uint8_t *, const char *, size_t);
-extern int      nni_url_to_address(nng_sockaddr *, const nng_url *);
-extern int      nni_url_parse_inline(nng_url *, const char *);
-extern int      nni_url_clone_inline(nng_url *, const nng_url *);
+extern nng_err  nni_url_to_address(nng_sockaddr *, const nng_url *);
+extern nng_err  nni_url_parse_inline(nng_url *, const char *);
+extern nng_err  nni_url_clone_inline(nng_url *, const nng_url *);
 extern void     nni_url_fini(nng_url *);
-extern int      nni_url_canonify_uri(char *);
+extern nng_err  nni_url_canonify_uri(char *);
 
 #endif // CORE_URL_H
diff --git a/src/platform/posix/posix_ipcdial.c b/src/platform/posix/posix_ipcdial.c
index d299f947..f9e87b72 100644
--- a/src/platform/posix/posix_ipcdial.c
+++ b/src/platform/posix/posix_ipcdial.c
@@ -304,7 +304,7 @@ ipc_dialer_set(
 	return (nni_setopt(ipc_dialer_options, nm, d, buf, sz, t));
 }
 
-int
+nng_err
 nni_ipc_dialer_alloc(nng_stream_dialer **dp, const nng_url *url)
 {
 	ipc_dialer *d;
diff --git a/src/platform/posix/posix_ipclisten.c b/src/platform/posix/posix_ipclisten.c
index 98432f71..ea540918 100644
--- a/src/platform/posix/posix_ipclisten.c
+++ b/src/platform/posix/posix_ipclisten.c
@@ -505,7 +505,7 @@ ipc_listener_accept(void *arg, nni_aio *aio)
 	nni_mtx_unlock(&l->mtx);
 }
 
-int
+nng_err
 nni_ipc_listener_alloc(nng_stream_listener **lp, const nng_url *url)
 {
 	ipc_listener *l;
@@ -560,5 +560,5 @@ nni_ipc_listener_alloc(nng_stream_listener **lp, const nng_url *url)
 	l->sl.sl_set    = ipc_listener_set;
 
 	*lp = (void *) l;
-	return (0);
+	return (NNG_OK);
 }
diff --git a/src/platform/posix/posix_sockfd.c b/src/platform/posix/posix_sockfd.c
index bc411252..a76ef85f 100644
--- a/src/platform/posix/posix_sockfd.c
+++ b/src/platform/posix/posix_sockfd.c
@@ -448,7 +448,7 @@ sfd_set(void *arg, const char *name, const void *buf, size_t sz, nni_type t)
 	return (nni_setopt(sfd_options, name, c, buf, sz, t));
 }
 
-int
+nng_err
 nni_sfd_conn_alloc(nni_sfd_conn **cp, int fd)
 {
 	nni_sfd_conn *c;
@@ -473,7 +473,7 @@ nni_sfd_conn_alloc(nni_sfd_conn **cp, int fd)
 	c->stream.s_set   = sfd_set;
 
 	*cp = c;
-	return (0);
+	return (NNG_OK);
 }
 
 void
diff --git a/src/platform/posix/posix_tcplisten.c b/src/platform/posix/posix_tcplisten.c
index 13ecb33e..73374dc5 100644
--- a/src/platform/posix/posix_tcplisten.c
+++ b/src/platform/posix/posix_tcplisten.c
@@ -506,7 +506,7 @@ tcp_listener_set(
 	return (nni_setopt(tcp_listener_options, name, arg, buf, sz, t));
 }
 
-static int
+static nng_err
 tcp_listener_alloc_addr(nng_stream_listener **lp, const nng_sockaddr *sa)
 {
 	tcp_listener *l;
@@ -532,16 +532,16 @@ tcp_listener_alloc_addr(nng_stream_listener **lp, const nng_sockaddr *sa)
 	l->ops.sl_set    = tcp_listener_set;
 
 	*lp = (void *) l;
-	return (0);
+	return (NNG_OK);
 }
 
-int
+nng_err
 nni_tcp_listener_alloc(nng_stream_listener **lp, const nng_url *url)
 {
-	int          rv;
+	nng_err      rv;
 	nng_sockaddr sa;
 
-	if ((rv = nni_url_to_address(&sa, url)) != 0) {
+	if ((rv = nni_url_to_address(&sa, url)) != NNG_OK) {
 		return (rv);
 	}
 
diff --git a/src/platform/windows/win_ipcdial.c b/src/platform/windows/win_ipcdial.c
index 43c1f744..ae42837c 100644
--- a/src/platform/windows/win_ipcdial.c
+++ b/src/platform/windows/win_ipcdial.c
@@ -238,7 +238,7 @@ ipc_dialer_get(void *arg, const char *nm, void *buf, size_t *szp, nni_type t)
 	return (nni_getopt(ipc_dialer_options, nm, d, buf, szp, t));
 }
 
-int
+nng_err
 nni_ipc_dialer_alloc(nng_stream_dialer **dp, const nng_url *url)
 {
 	ipc_dialer *d;
@@ -269,7 +269,7 @@ nni_ipc_dialer_alloc(nng_stream_dialer **dp, const nng_url *url)
 	d->sd.sd_set          = ipc_dialer_set;
 	nni_aio_list_init(&d->aios);
 	*dp = (void *) d;
-	return (0);
+	return (NNG_OK);
 }
 
 int
diff --git a/src/platform/windows/win_ipclisten.c b/src/platform/windows/win_ipclisten.c
index e40f51d7..56ec5cc3 100644
--- a/src/platform/windows/win_ipclisten.c
+++ b/src/platform/windows/win_ipclisten.c
@@ -348,7 +348,7 @@ ipc_listener_free(void *arg)
 	NNI_FREE_STRUCT(l);
 }
 
-int
+nng_err
 nni_ipc_listener_alloc(nng_stream_listener **lp, const nng_url *url)
 {
 	ipc_listener *l;
diff --git a/src/platform/windows/win_socketpair.c b/src/platform/windows/win_socketpair.c
index f97df2fd..57820c72 100644
--- a/src/platform/windows/win_socketpair.c
+++ b/src/platform/windows/win_socketpair.c
@@ -9,7 +9,6 @@
 
 #include "core/nng_impl.h"
 
-
 #ifdef NNG_HAVE_SOCKETPAIR_TODO
 // TODO: Windows lacks socketpair.  We can emulate it with an explcit
 // implementation based on AF_UNIX.
@@ -46,7 +45,7 @@ nni_sfd_close_fd(int fd)
 	NNI_ARG_UNUSED(fd);
 }
 
-int
+nng_err
 nni_sfd_conn_alloc(nni_sfd_conn **cp, int fd)
 {
 	NNI_ARG_UNUSED(cp);
diff --git a/src/platform/windows/win_tcplisten.c b/src/platform/windows/win_tcplisten.c
index c8c6ab2c..aa4a18e9 100644
--- a/src/platform/windows/win_tcplisten.c
+++ b/src/platform/windows/win_tcplisten.c
@@ -543,11 +543,11 @@ tcp_listener_set(
 	return (nni_setopt(tcp_listener_options, name, arg, buf, sz, t));
 }
 
-static int
+static nng_err
 tcp_listener_alloc_addr(nng_stream_listener **lp, const nng_sockaddr *sa)
 {
 	tcp_listener *l;
-	int           rv;
+	nng_err       rv;
 
 	if ((l = NNI_ALLOC_STRUCT(l)) == NULL) {
 		return (NNG_ENOMEM);
@@ -576,16 +576,16 @@ tcp_listener_alloc_addr(nng_stream_listener **lp, const nng_sockaddr *sa)
 	l->ops.sl_set    = tcp_listener_set;
 
 	*lp = (void *) l;
-	return (0);
+	return (NNG_OK);
 }
 
-int
+nng_err
 nni_tcp_listener_alloc(nng_stream_listener **lp, const nng_url *url)
 {
-	int          rv;
+	nng_err      rv;
 	nng_sockaddr sa;
 
-	if ((rv = nni_url_to_address(&sa, url)) != 0) {
+	if ((rv = nni_url_to_address(&sa, url)) != NNG_OK) {
 		return (rv);
 	}
 
diff --git a/src/supplemental/tls/tls_api.h b/src/supplemental/tls/tls_api.h
index 83256593..1cea7914 100644
--- a/src/supplemental/tls/tls_api.h
+++ b/src/supplemental/tls/tls_api.h
@@ -16,7 +16,7 @@
 
 // The implementation supplies this function to create the TLS connection
 // object.  All fields will be zeroed.
-extern int nni_tls_dialer_alloc(nng_stream_dialer **, const nng_url *);
-extern int nni_tls_listener_alloc(nng_stream_listener **, const nng_url *);
+extern nng_err nni_tls_dialer_alloc(nng_stream_dialer **, const nng_url *);
+extern nng_err nni_tls_listener_alloc(nng_stream_listener **, const nng_url *);
 
 #endif // NNG_SUPPLEMENTAL_TLS_TLS_API_H
diff --git a/src/supplemental/tls/tls_dialer.c b/src/supplemental/tls/tls_dialer.c
index 7f547839..5927edd8 100644
--- a/src/supplemental/tls/tls_dialer.c
+++ b/src/supplemental/tls/tls_dialer.c
@@ -144,11 +144,11 @@ tls_dialer_set(
 	return (nni_stream_dialer_set(d->d, name, buf, sz, t));
 }
 
-int
+nng_err
 nni_tls_dialer_alloc(nng_stream_dialer **dp, const nng_url *url)
 {
 	tls_dialer *d;
-	int         rv;
+	nng_err     rv;
 	nng_url     my_url;
 
 	memcpy(&my_url, url, sizeof(my_url));
@@ -161,12 +161,13 @@ nni_tls_dialer_alloc(nng_stream_dialer **dp, const nng_url *url)
 	}
 	nni_mtx_init(&d->lk);
 
-	if ((rv = nng_stream_dialer_alloc_url(&d->d, &my_url)) != 0) {
+	if ((rv = nng_stream_dialer_alloc_url(&d->d, &my_url)) != NNG_OK) {
 		nni_mtx_fini(&d->lk);
 		NNI_FREE_STRUCT(d);
 		return (rv);
 	}
-	if ((rv = nng_tls_config_alloc(&d->cfg, NNG_TLS_MODE_CLIENT)) != 0) {
+	if ((rv = nng_tls_config_alloc(&d->cfg, NNG_TLS_MODE_CLIENT)) !=
+	    NNG_OK) {
 		nng_stream_dialer_free(d->d);
 		nni_mtx_fini(&d->lk);
 		NNI_FREE_STRUCT(d);
diff --git a/src/supplemental/tls/tls_listener.c b/src/supplemental/tls/tls_listener.c
index 07cdbda6..b16877b1 100644
--- a/src/supplemental/tls/tls_listener.c
+++ b/src/supplemental/tls/tls_listener.c
@@ -151,11 +151,11 @@ tls_listener_set(
 	return (nni_stream_listener_set(l->l, name, buf, sz, t));
 }
 
-int
+nng_err
 nni_tls_listener_alloc(nng_stream_listener **lp, const nng_url *url)
 {
 	tls_listener *l;
-	int           rv;
+	nng_err       rv;
 	nng_url       my_url;
 
 	memcpy(&my_url, url, sizeof(my_url));
@@ -169,12 +169,13 @@ nni_tls_listener_alloc(nng_stream_listener **lp, const nng_url *url)
 	}
 	nni_mtx_init(&l->lk);
 
-	if ((rv = nng_stream_listener_alloc_url(&l->l, &my_url)) != 0) {
+	if ((rv = nng_stream_listener_alloc_url(&l->l, &my_url)) != NNG_OK) {
 		nni_mtx_fini(&l->lk);
 		NNI_FREE_STRUCT(l);
 		return (rv);
 	}
-	if ((rv = nng_tls_config_alloc(&l->cfg, NNG_TLS_MODE_SERVER)) != 0) {
+	if ((rv = nng_tls_config_alloc(&l->cfg, NNG_TLS_MODE_SERVER)) !=
+	    NNG_OK) {
 		nng_stream_listener_free(l->l);
 		nni_mtx_fini(&l->lk);
 		NNI_FREE_STRUCT(l);
diff --git a/src/supplemental/websocket/websocket.c b/src/supplemental/websocket/websocket.c
index 0f5c6598..b3410dea 100644
--- a/src/supplemental/websocket/websocket.c
+++ b/src/supplemental/websocket/websocket.c
@@ -1998,11 +1998,11 @@ ws_listener_set_tls(void *arg, nng_tls_config *cfg)
 	return (nni_http_server_set_tls(l->server, cfg));
 }
 
-int
+nng_err
 nni_ws_listener_alloc(nng_stream_listener **wslp, const nng_url *url)
 {
 	nni_ws_listener *l;
-	int              rv;
+	nng_err          rv;
 	char            *host;
 
 	if ((l = NNI_ALLOC_STRUCT(l)) == NULL) {
@@ -2054,7 +2054,7 @@ nni_ws_listener_alloc(nng_stream_listener **wslp, const nng_url *url)
 	l->ops.sl_get_tls = ws_listener_get_tls;
 	l->ops.sl_set_tls = ws_listener_set_tls;
 	*wslp             = (void *) l;
-	return (0);
+	return (NNG_OK);
 }
 
 void
@@ -2526,11 +2526,11 @@ ws_dialer_set_tls(void *arg, nng_tls_config *cfg)
 	return (nni_http_client_set_tls(d->client, cfg));
 }
 
-int
+nng_err
 nni_ws_dialer_alloc(nng_stream_dialer **dp, const nng_url *url)
 {
 	nni_ws_dialer *d;
-	int            rv;
+	nng_err        rv;
 
 	if ((d = NNI_ALLOC_STRUCT(d)) == NULL) {
 		return (NNG_ENOMEM);
@@ -2564,7 +2564,7 @@ nni_ws_dialer_alloc(nng_stream_dialer **dp, const nng_url *url)
 	d->ops.sd_set_tls = ws_dialer_set_tls;
 	d->ops.sd_get_tls = ws_dialer_get_tls;
 	*dp               = (void *) d;
-	return (0);
+	return (NNG_OK);
 }
 
 // Dialer does not get a hook chance, as it can examine the request
diff --git a/src/supplemental/websocket/websocket.h b/src/supplemental/websocket/websocket.h
index 36e8dba5..0fa045d5 100644
--- a/src/supplemental/websocket/websocket.h
+++ b/src/supplemental/websocket/websocket.h
@@ -33,7 +33,7 @@ typedef struct nni_ws_dialer   nni_ws_dialer;
 
 // Much of the websocket API is still "private", meaning you should not
 // rely upon it being around.
-extern int nni_ws_listener_alloc(nng_stream_listener **, const nng_url *);
-extern int nni_ws_dialer_alloc(nng_stream_dialer **, const nng_url *);
+extern nng_err nni_ws_listener_alloc(nng_stream_listener **, const nng_url *);
+extern nng_err nni_ws_dialer_alloc(nng_stream_dialer **, const nng_url *);
 
 #endif // NNG_SUPPLEMENTAL_WEBSOCKET_WEBSOCKET_H