[git.ipfire.org] IPFire 2.x development tree branch, next, updated. cdbe35044232c89db38f045c70b1ef1948f4d6e4

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- Log -----------------------------------------------------------------
commit cdbe35044232c89db38f045c70b1ef1948f4d6e4
Author: Michael Tremer <michael.tremer(a)ipfire.org>
Date:   Wed Jul 17 18:53:13 2013 +0200

    openvpnctrl: Save the binary from crashing with wrong input.
    
    See #10390.

-----------------------------------------------------------------------

Summary of changes:
 src/misc-progs/openvpnctrl.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

Difference in files:
diff --git a/src/misc-progs/openvpnctrl.c b/src/misc-progs/openvpnctrl.c
index e366294..76916f1 100644
--- a/src/misc-progs/openvpnctrl.c
+++ b/src/misc-progs/openvpnctrl.c
@@ -362,6 +362,10 @@ char* calcTransferNetAddress(const connection* conn) {
 	char *subnetmask = strdup(conn->transfer_subnet);
 	char *address = strsep(&subnetmask, "/");
 
+	if ((address == NULL) || (subnetmask == NULL)) {
+		goto ERROR;
+	}
+
 	in_addr_t _address    = inet_addr(address);
 	in_addr_t _subnetmask = inet_addr(subnetmask);
 	_address &= _subnetmask;
@@ -496,12 +500,11 @@ void setFirewallRules(void) {
 			local_subnet_address = getLocalSubnetAddress(conn);
 			transfer_subnet_address = calcTransferNetAddress(conn);
 
-			if ((!local_subnet_address) || (!transfer_subnet_address))
-				continue;
-
-			snprintf(command, STRING_SIZE, "/sbin/iptables -t nat -A %s -s %s -j SNAT --to-source %s",
-				OVPNNAT, transfer_subnet_address, local_subnet_address);
-			executeCommand(command);
+			if ((local_subnet_address) && (transfer_subnet_address)) {
+				snprintf(command, STRING_SIZE, "/sbin/iptables -t nat -A %s -s %s -j SNAT --to-source %s",
+					OVPNNAT, transfer_subnet_address, local_subnet_address);
+				executeCommand(command);
+			}
 		}
 
 		conn = conn->next;


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