added --netmask argument

1 files changed, 12 insertions, 1 deletions

diff --git a/src/ipcalc.c b/src/ipcalc.c
index 2535bb6b..fc8d3d5c 100644
--- a/src/ipcalc.c
+++ b/src/ipcalc.c
@@ -8,7 +8,7 @@
 typedef unsigned int int32;
 
 int main(int argc, char ** argv) {
-    int showBroadcast = 0, showNetwork = 0, showHostname = 0;
+    int showBroadcast = 0, showNetwork = 0, showHostname = 0, showNetmask = 0;
     int beSilent = 0;
     int rc;
     poptContext optCon;
@@ -19,6 +19,7 @@ int main(int argc, char ** argv) {
     struct poptOption optionsTable[] = {
 	    { "broadcast", '\0', 0, &showBroadcast, 0 },
 	    { "hostname", '\0', 0, &showHostname, 0 },
+	    { "netmask", '\0', 0, &showNetmask, 0 },
 	    { "network", '\0', 0, &showNetwork, 0 },
 	    { "silent", '\0', 0, &beSilent, 0 },
 	    { NULL, '\0', 0, 0, 0 },
@@ -69,6 +70,16 @@ int main(int argc, char ** argv) {
 	return 1;
     }
 
+    if (showNetmask) {
+	if (((ntohl(ip) & 0xFF000000) >> 24) <= 127)
+	    chptr = "255.0.0.0";
+	else if (((ntohl(ip) & 0xFF000000) >> 24) <= 191)
+	    chptr = "255.255.0.0";
+	else 
+	    chptr = "255.255.255.0";
+
+	printf("NETMASK=%s\n", chptr);
+    }
 
     if (showBroadcast) {
 	broadcast = (ip & netmask) | ~netmask;