[PATCH 13/18] conf: Move check for disabled interfaces earlier

[David Gibson <david@gibson.dropbear.id.au>]

conf_ports_range_except() generates errors if asked to map an address of
a family that's not available.  This is quite late to perform the check,
most callsites pass a NULL address, making the test moot, the one remaining
can check the address earlier.  Move the check there, simplifying the
lower level function.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 conf.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/conf.c b/conf.c
index dc9468c2..d4c2a013 100644
--- a/conf.c
+++ b/conf.c
@@ -160,16 +160,6 @@ static void conf_ports_range_except(const struct ctx *c, char optname,
 	else
 		assert(0);
 
-	if (addr) {
-		if (!c->ifi4 && inany_v4(addr)) {
-			die("IPv4 is disabled, can't use -%c %s",
-			    optname, optarg);
-		} else if (!c->ifi6 && !inany_v4(addr)) {
-			die("IPv6 is disabled, can't use -%c %s",
-			    optname, optarg);
-		}
-	}
-
 	for (base = first; base <= last; base++) {
 		if (exclude && bitmap_isset(exclude, base))
 			continue;
@@ -335,6 +325,16 @@ static void conf_ports(const struct ctx *c, char optname, const char *optarg,
 		addr = NULL;
 	}
 
+	if (addr) {
+		if (!c->ifi4 && inany_v4(addr)) {
+			die("IPv4 is disabled, can't use -%c %s",
+			    optname, optarg);
+		} else if (!c->ifi6 && !inany_v4(addr)) {
+			die("IPv6 is disabled, can't use -%c %s",
+			    optname, optarg);
+		}
+	}
+
 	/* Mark all exclusions first, they might be given after base ranges */
 	p = spec;
 	do {
-- 
2.53.0