Move option helpers to their own file.

5 files changed, 154 insertions, 93 deletions

diff --git a/src/core/nng_impl.h b/src/core/nng_impl.h
index a0a1a2e6..46341863 100644
--- a/src/core/nng_impl.h
+++ b/src/core/nng_impl.h
@@ -27,6 +27,7 @@
 #include "core/init.h"
 #include "core/message.h"
 #include "core/msgqueue.h"
+#include "core/options.h"
 #include "core/panic.h"
 #include "core/platform.h"
 #include "core/protocol.h"
diff --git a/src/core/options.c b/src/core/options.c
new file mode 100644
index 00000000..b970a0e7
--- /dev/null
+++ b/src/core/options.c
@@ -0,0 +1,114 @@
+//
+// Copyright 2016 Garrett D'Amore <garrett@damore.org>
+//
+// This software is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+#include "core/nng_impl.h"
+
+#include <string.h>
+
+int
+nni_setopt_duration(nni_duration *ptr, const void *val, size_t size)
+{
+	nni_duration dur;
+
+	if (size != sizeof (*ptr)) {
+		return (NNG_EINVAL);
+	}
+	memcpy(&dur, val, sizeof (dur));
+	if (dur < -1) {
+		return (NNG_EINVAL);
+	}
+	*ptr = dur;
+	return (0);
+}
+
+
+int
+nni_setopt_int(int *ptr, const void *val, size_t size, int minval, int maxval)
+{
+	int v;
+
+	if (size != sizeof (v)) {
+		return (NNG_EINVAL);
+	}
+	memcpy(&v, val, sizeof (v));
+	if (v > maxval) {
+		return (NNG_EINVAL);
+	}
+	if (v < minval) {
+		return (NNG_EINVAL);
+	}
+	*ptr = v;
+	return (0);
+}
+
+
+int
+nni_getopt_duration(nni_duration *ptr, void *val, size_t *sizep)
+{
+	size_t sz = sizeof (*ptr);
+
+	if (sz > *sizep) {
+		sz = *sizep;
+	}
+	*sizep = sizeof (*ptr);
+	memcpy(val, ptr, sz);
+	return (0);
+}
+
+
+int
+nni_getopt_int(int *ptr, void *val, size_t *sizep)
+{
+	size_t sz = sizeof (*ptr);
+
+	if (sz > *sizep) {
+		sz = *sizep;
+	}
+	*sizep = sizeof (*ptr);
+	memcpy(val, ptr, sz);
+	return (0);
+}
+
+
+int
+nni_setopt_buf(nni_msgqueue *mq, const void *val, size_t sz)
+{
+	int len;
+
+	if (sz < sizeof (len)) {
+		return (NNG_EINVAL);
+	}
+	memcpy(&len, val, sizeof (len));
+	if (len < 0) {
+		return (NNG_EINVAL);
+	}
+	if (len > 8192) {
+		// put a reasonable uppper limit on queue depth.
+		// This is a count in messages, so the total queue
+		// size could be quite large indeed in this case.
+		return (NNG_EINVAL);
+	}
+	return (nni_msgqueue_resize(mq, len));
+}
+
+
+int
+nni_getopt_buf(nni_msgqueue *mq, void *val, size_t *sizep)
+{
+	int len = nni_msgqueue_cap(mq);
+
+	int sz = *sizep;
+
+	if (sz > sizeof (len)) {
+		sz = sizeof (len);
+	}
+	memcpy(val, &len, sz);
+	*sizep = sizeof (len);
+	return (0);
+}
diff --git a/src/core/options.h b/src/core/options.h
new file mode 100644
index 00000000..7319bdf4
--- /dev/null
+++ b/src/core/options.h
@@ -0,0 +1,39 @@
+//
+// Copyright 2016 Garrett D'Amore <garrett@damore.org>
+//
+// This software is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+#ifndef CORE_OPTIONS_H
+#define CORE_OPTIONS_H
+
+// Option helpers.  These can be called from protocols or transports
+// in their own option handling, centralizing the logic for dealing with
+// variable sized options.
+
+// nni_setopt_buf sets the queue size for the message queue.
+extern int nni_setopt_buf(nni_msgqueue *, const void *, size_t);
+
+// nni_getopt_buf gets the queue size for the message queue.
+extern int nni_getopt_buf(nni_msgqueue *, void *, size_t *);
+
+// nni_setopt_duration sets the duration.  Durations must be legal,
+// either a positive value, 0, or -1 to indicate forever.
+extern int nni_setopt_duration(nni_duration *, const void *, size_t);
+
+// nni_getopt_duration gets the duration.
+extern int nni_getopt_duration(nni_duration *, void *, size_t *);
+
+// nni_setopt_int sets an integer, which must be between the minimum and
+// maximum values (inclusive).
+extern int nni_setopt_int(int *, const void *, size_t, int, int);
+#define NNI_MAXINT ((int)2147483647)
+#define	NNI_MININT ((int)-2147483648)
+
+// nni_getopt_int gets an integer.
+extern int nni_getopt_int(int *, void *, size_t *);
+
+#endif  // CORE_OPTIONS_H
diff --git a/src/core/socket.c b/src/core/socket.c
index c9b9175f..8c4cd339 100644
--- a/src/core/socket.c
+++ b/src/core/socket.c
@@ -452,94 +452,6 @@ nni_socket_senderr(nni_socket *sock, int err)
 
 
 int
-nni_setopt_duration(nni_duration *ptr, const void *val, size_t size)
-{
-	nni_duration dur;
-
-	if (size != sizeof (*ptr)) {
-		return (NNG_EINVAL);
-	}
-	memcpy(&dur, val, sizeof (dur));
-	if (dur < -1) {
-		return (NNG_EINVAL);
-	}
-	*ptr = dur;
-	return (0);
-}
-
-
-int
-nni_setopt_int(int *ptr, const void *val, size_t size)
-{
-	if (size != sizeof (*ptr)) {
-		return (NNG_EINVAL);
-	}
-	memcpy(ptr, val, sizeof (*ptr));
-	return (0);
-}
-
-
-int
-nni_getopt_duration(nni_duration *ptr, void *val, size_t *sizep)
-{
-	size_t sz = sizeof (*ptr);
-
-	if (sz > *sizep) {
-		sz = *sizep;
-	}
-	*sizep = sizeof (*ptr);
-	memcpy(val, ptr, sz);
-	return (0);
-}
-
-
-int
-nni_getopt_int(int *ptr, void *val, size_t *sizep)
-{
-	size_t sz = sizeof (*ptr);
-
-	if (sz > *sizep) {
-		sz = *sizep;
-	}
-	*sizep = sizeof (*ptr);
-	memcpy(val, ptr, sz);
-	return (0);
-}
-
-
-static int
-nni_setopt_buf(nni_msgqueue *mq, const void *val, size_t sz)
-{
-	int len;
-
-	if (sz < sizeof (len)) {
-		return (NNG_EINVAL);
-	}
-	memcpy(&len, val, sizeof (len));
-	if (len < 0) {
-		return (NNG_EINVAL);
-	}
-	return (nni_msgqueue_resize(mq, len));
-}
-
-
-static int
-nni_getopt_buf(nni_msgqueue *mq, void *val, size_t *sizep)
-{
-	int len = nni_msgqueue_cap(mq);
-
-	int sz = *sizep;
-
-	if (sz > sizeof (len)) {
-		sz = sizeof (len);
-	}
-	memcpy(val, &len, sz);
-	*sizep = sizeof (len);
-	return (0);
-}
-
-
-int
 nni_socket_setopt(nni_socket *sock, int opt, const void *val, size_t size)
 {
 	size_t rsz;
diff --git a/src/core/socket.h b/src/core/socket.h
index c80af22e..7b49e85f 100644
--- a/src/core/socket.h
+++ b/src/core/socket.h
@@ -56,11 +56,6 @@ extern int nni_socket_sendmsg(nni_socket *, nni_msg *, nni_time);
 extern int nni_socket_dial(nni_socket *, const char *, nni_endpt **, int);
 extern int nni_socket_listen(nni_socket *, const char *, nni_endpt **, int);
 
-extern int nni_setopt_duration(nni_duration *, const void *, size_t);
-extern int nni_getopt_duration(nni_duration *, void *, size_t *);
-extern int nni_setopt_int(int *, const void *, size_t);
-extern int nni_getopt_int(int *, void *, size_t *);
-
 // Set error codes for applications.  These are only ever
 // called from the filter functions in protocols, and thus
 // already have the socket lock held.