fixes #825 TCP public API should use generic setopt/getopt

This changes much of the internal API for TCP option handling, and
includes hooks for some of this in various consumers.  Note that the
consumers still need to have additional work done to complete them,
which will be part of providing public "raw" TLS and WebSocket APIs.

We would also like to finish addressing the call sites of
nni_tcp_listener_start() that assume the sockaddr is modified --
it would be superior to use the NNG_OPT_LOCADDR option.  Thaat will be
addressed in a follow up PR.

1 files changed, 101 insertions, 125 deletions

diff --git a/src/transport/tcp/tcp.c b/src/transport/tcp/tcp.c
index 4f7dbd72..38b8cbaf 100644
--- a/src/transport/tcp/tcp.c
+++ b/src/transport/tcp/tcp.c
@@ -1,6 +1,7 @@
 //
 // Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
 // Copyright 2018 Capitar IT Group BV <info@capitar.com>
+// Copyright 2018 Devolutions <info@devolutions.net>
 //
 // This software is supplied under the terms of the MIT License, a
 // copy of which should be located in the distribution where this
@@ -353,8 +354,10 @@ tcptran_pipe_nego_cb(void *arg)
 
 	NNI_GET16(&p->rxlen[4], p->peer);
 	p->useraio = NULL;
-	(void) nni_tcp_conn_set_nodelay(p->conn, p->nodelay);
-	(void) nni_tcp_conn_set_keepalive(p->conn, p->keepalive);
+	(void) nni_tcp_conn_setopt(p->conn, NNG_OPT_TCP_NODELAY, &p->nodelay,
+	    sizeof(p->nodelay), NNI_TYPE_BOOL);
+	(void) nni_tcp_conn_setopt(p->conn, NNG_OPT_TCP_KEEPALIVE,
+	    &p->keepalive, sizeof(p->keepalive), NNI_TYPE_BOOL);
 
 	nni_mtx_unlock(&ep->mtx);
 
@@ -671,45 +674,11 @@ tcptran_pipe_peer(void *arg)
 }
 
 static int
-tcptran_pipe_get_locaddr(void *arg, void *v, size_t *szp, nni_opt_type t)
+tcptran_pipe_getopt(
+    void *arg, const char *name, void *buf, size_t *szp, nni_type t)
 {
 	tcptran_pipe *p = arg;
-	int           rv;
-	nni_sockaddr  sa;
-
-	memset(&sa, 0, sizeof(sa));
-	if ((rv = nni_tcp_conn_sockname(p->conn, &sa)) == 0) {
-		rv = nni_copyout_sockaddr(&sa, v, szp, t);
-	}
-	return (rv);
-}
-
-static int
-tcptran_pipe_get_remaddr(void *arg, void *v, size_t *szp, nni_opt_type t)
-{
-	tcptran_pipe *p = arg;
-	int           rv;
-	nni_sockaddr  sa;
-
-	memset(&sa, 0, sizeof(sa));
-	if ((rv = nni_tcp_conn_peername(p->conn, &sa)) == 0) {
-		rv = nni_copyout_sockaddr(&sa, v, szp, t);
-	}
-	return (rv);
-}
-
-static int
-tcptran_pipe_get_keepalive(void *arg, void *v, size_t *szp, nni_opt_type t)
-{
-	tcptran_pipe *p = arg;
-	return (nni_copyout_bool(p->keepalive, v, szp, t));
-}
-
-static int
-tcptran_pipe_get_nodelay(void *arg, void *v, size_t *szp, nni_opt_type t)
-{
-	tcptran_pipe *p = arg;
-	return (nni_copyout_bool(p->nodelay, v, szp, t));
+	return (nni_tcp_conn_getopt(p->conn, name, buf, szp, t));
 }
 
 static void
@@ -761,7 +730,7 @@ tcptran_ep_close(void *arg)
 }
 
 static int
-tcptran_ep_init_dialer(void **dp, nni_url *url, nni_dialer *ndialer)
+tcptran_dialer_init(void **dp, nni_url *url, nni_dialer *ndialer)
 {
 	tcptran_ep * ep;
 	int          rv;
@@ -844,7 +813,8 @@ tcptran_ep_init_dialer(void **dp, nni_url *url, nni_dialer *ndialer)
 		return (rv);
 	}
 	if ((srcsa.s_family != NNG_AF_UNSPEC) &&
-	    ((rv = nni_tcp_dialer_set_src_addr(ep->dialer, &srcsa)) != 0)) {
+	    ((rv = nni_tcp_dialer_setopt(ep->dialer, NNG_OPT_LOCADDR, &srcsa,
+	          sizeof(srcsa), NNI_TYPE_SOCKADDR)) != 0)) {
 		tcptran_ep_fini(ep);
 		return (rv);
 	}
@@ -852,7 +822,7 @@ tcptran_ep_init_dialer(void **dp, nni_url *url, nni_dialer *ndialer)
 	return (0);
 }
 static int
-tcptran_ep_init_listener(void **lp, nni_url *url, nni_listener *nlistener)
+tcptran_listener_init(void **lp, nni_url *url, nni_listener *nlistener)
 {
 	tcptran_ep *ep;
 	int         rv;
@@ -967,10 +937,19 @@ tcptran_ep_get_url(void *arg, void *v, size_t *szp, nni_opt_type t)
 	tcptran_ep *ep = arg;
 
 	if (ep->listener != NULL) {
-		char ustr[128];
-		char ipstr[48];  // max for IPv6 addresses including []
-		char portstr[6]; // max for 16-bit port
-		nni_ntop(&ep->bsa, ipstr, portstr);
+		char         ustr[128];
+		char         ipstr[48];  // max for IPv6 addresses including []
+		char         portstr[6]; // max for 16-bit port
+		nng_sockaddr sa;
+		size_t       sz = sizeof(sa);
+		int          rv;
+		rv = nni_tcp_listener_getopt(ep->listener, NNG_OPT_LOCADDR,
+		    &sa, &sz, NNI_TYPE_SOCKADDR);
+		if (rv != 0) {
+			return (rv);
+		}
+
+		nni_ntop(&sa, ipstr, portstr);
 		snprintf(ustr, sizeof(ustr), "tcp://%s:%s", ipstr, portstr);
 		return (nni_copyout_str(ustr, v, szp, t));
 	}
@@ -1115,41 +1094,18 @@ tcptran_ep_get_locaddr(void *arg, void *buf, size_t *szp, nni_opt_type t)
 	return (rv);
 }
 
-static nni_option tcptran_pipe_options[] = {
-	{
-	    .o_name = NNG_OPT_LOCADDR,
-	    .o_get  = tcptran_pipe_get_locaddr,
-	},
-	{
-	    .o_name = NNG_OPT_REMADDR,
-	    .o_get  = tcptran_pipe_get_remaddr,
-	},
-	{
-	    .o_name = NNG_OPT_TCP_KEEPALIVE,
-	    .o_get  = tcptran_pipe_get_keepalive,
-	},
-	{
-	    .o_name = NNG_OPT_TCP_NODELAY,
-	    .o_get  = tcptran_pipe_get_nodelay,
-	},
-	// terminate list
-	{
-	    .o_name = NULL,
-	},
-};
-
 static nni_tran_pipe_ops tcptran_pipe_ops = {
-	.p_init    = tcptran_pipe_init,
-	.p_fini    = tcptran_pipe_fini,
-	.p_stop    = tcptran_pipe_stop,
-	.p_send    = tcptran_pipe_send,
-	.p_recv    = tcptran_pipe_recv,
-	.p_close   = tcptran_pipe_close,
-	.p_peer    = tcptran_pipe_peer,
-	.p_options = tcptran_pipe_options,
+	.p_init   = tcptran_pipe_init,
+	.p_fini   = tcptran_pipe_fini,
+	.p_stop   = tcptran_pipe_stop,
+	.p_send   = tcptran_pipe_send,
+	.p_recv   = tcptran_pipe_recv,
+	.p_close  = tcptran_pipe_close,
+	.p_peer   = tcptran_pipe_peer,
+	.p_getopt = tcptran_pipe_getopt,
 };
 
-static nni_option tcptran_dialer_options[] = {
+static const nni_option tcptran_ep_opts[] = {
 	{
 	    .o_name = NNG_OPT_RECVMAXSZ,
 	    .o_get  = tcptran_ep_get_recvmaxsz,
@@ -1159,67 +1115,87 @@ static nni_option tcptran_dialer_options[] = {
 	    .o_name = NNG_OPT_URL,
 	    .o_get  = tcptran_ep_get_url,
 	},
-	{
-	    .o_name = NNG_OPT_TCP_NODELAY,
-	    .o_get  = tcptran_ep_get_nodelay,
-	    .o_set  = tcptran_ep_set_nodelay,
-	},
-	{
-	    .o_name = NNG_OPT_TCP_KEEPALIVE,
-	    .o_get  = tcptran_ep_get_keepalive,
-	    .o_set  = tcptran_ep_set_keepalive,
-	},
 	// terminate list
 	{
 	    .o_name = NULL,
 	},
 };
 
-static nni_option tcptran_listener_options[] = {
-	{
-	    .o_name = NNG_OPT_RECVMAXSZ,
-	    .o_get  = tcptran_ep_get_recvmaxsz,
-	    .o_set  = tcptran_ep_set_recvmaxsz,
-	},
-	{
-	    .o_name = NNG_OPT_LOCADDR,
-	    .o_get  = tcptran_ep_get_locaddr,
-	},
-	{
-	    .o_name = NNG_OPT_URL,
-	    .o_get  = tcptran_ep_get_url,
-	},
-	{
-	    .o_name = NNG_OPT_TCP_NODELAY,
-	    .o_get  = tcptran_ep_get_nodelay,
-	    .o_set  = tcptran_ep_set_nodelay,
-	},
-	{
-	    .o_name = NNG_OPT_TCP_KEEPALIVE,
-	    .o_get  = tcptran_ep_get_keepalive,
-	    .o_set  = tcptran_ep_set_keepalive,
-	},
-	// terminate list
-	{
-	    .o_name = NULL,
-	},
-};
+static int
+tcptran_dialer_getopt(
+    void *arg, const char *name, void *buf, size_t *szp, nni_type t)
+{
+	tcptran_ep *ep = arg;
+	int         rv;
+
+	rv = nni_tcp_dialer_getopt(ep->dialer, name, buf, szp, t);
+	if (rv == NNG_ENOTSUP) {
+		rv = nni_getopt(tcptran_ep_opts, name, ep, buf, szp, t);
+	}
+	return (rv);
+}
+
+static int
+tcptran_dialer_setopt(
+    void *arg, const char *name, const void *buf, size_t sz, nni_type t)
+{
+	tcptran_ep *ep = arg;
+	int         rv;
+
+	rv = nni_tcp_dialer_setopt(
+	    ep != NULL ? ep->dialer : NULL, name, buf, sz, t);
+	if (rv == NNG_ENOTSUP) {
+		rv = nni_setopt(tcptran_ep_opts, name, ep, buf, sz, t);
+	}
+	return (rv);
+}
+
+static int
+tcptran_listener_getopt(
+    void *arg, const char *name, void *buf, size_t *szp, nni_type t)
+{
+	tcptran_ep *ep = arg;
+	int         rv;
+
+	rv = nni_tcp_listener_getopt(ep->listener, name, buf, szp, t);
+	if (rv == NNG_ENOTSUP) {
+		rv = nni_getopt(tcptran_ep_opts, name, ep, buf, szp, t);
+	}
+	return (rv);
+}
+
+static int
+tcptran_listener_setopt(
+    void *arg, const char *name, const void *buf, size_t sz, nni_type t)
+{
+	tcptran_ep *ep = arg;
+	int         rv;
+
+	rv = nni_tcp_listener_setopt(
+	    ep != NULL ? ep->listener : NULL, name, buf, sz, t);
+	if (rv == NNG_ENOTSUP) {
+		rv = nni_setopt(tcptran_ep_opts, name, ep, buf, sz, t);
+	}
+	return (rv);
+}
 
 static nni_tran_dialer_ops tcptran_dialer_ops = {
-	.d_init    = tcptran_ep_init_dialer,
+	.d_init    = tcptran_dialer_init,
 	.d_fini    = tcptran_ep_fini,
 	.d_connect = tcptran_ep_connect,
 	.d_close   = tcptran_ep_close,
-	.d_options = tcptran_dialer_options,
+	.d_getopt  = tcptran_dialer_getopt,
+	.d_setopt  = tcptran_dialer_setopt,
 };
 
 static nni_tran_listener_ops tcptran_listener_ops = {
-	.l_init    = tcptran_ep_init_listener,
-	.l_fini    = tcptran_ep_fini,
-	.l_bind    = tcptran_ep_bind,
-	.l_accept  = tcptran_ep_accept,
-	.l_close   = tcptran_ep_close,
-	.l_options = tcptran_listener_options,
+	.l_init   = tcptran_listener_init,
+	.l_fini   = tcptran_ep_fini,
+	.l_bind   = tcptran_ep_bind,
+	.l_accept = tcptran_ep_accept,
+	.l_close  = tcptran_ep_close,
+	.l_getopt = tcptran_listener_getopt,
+	.l_setopt = tcptran_listener_setopt,
 };
 
 static nni_tran tcp_tran = {