Squid Radius :: Nas_Port_Type Patch

[Masood Ahmad Shah <masood@xxxxxxxxxxxxxx>]

Day before yesterday I installed the squid radius support. In our case it was not like we can download and make install and the authentication helper starts authenticating. I was getting authentication failure when getting into squid with valid radius username/password. We started thinking about why we are getting squid authentication failure.

Well, we finally finished with success. The problem was that there was a parameter Nas_Port_Type need to send from squid authenticator helper to radius server. We finally made it; we have added Nas-Port-Type support to the squid_rad_auth authentication helper allowing sending Nas-Port-Type via the authentication request packet to radius; The Nas_Port_Type patch is available as an attachment.In patch the default value for this attribute is 0; you can set your own by changing:

static int nasporttype = 0;

If you are new to linux/unix and don't know how to patch; this blog might help.

http://weblogs.com.pk/jahil/archive/2007/04/30/patch-in-unix.aspx

Yea but I would not finish it without thanks to Khurram Bh; Khurram is one of my colleagues who have good programming problem-solving skills. He is one of those people I usually go to visit him. We have been together and we share views. I appreciate his very capable skills and his willingness to work hard to keep the things smooth. I have always appreciated his support.
                               
Regards,
Masood Ahmad Shah
http://www.nexlinx.net.pk

--- squid_rad_auth.c	2006-05-24 19:27:32.000000000 +0500
+++ squid_rad_auth.c.nastype	2007-06-12 18:07:42.000000000 +0500
@@ -82,6 +82,9 @@
 static char identifier[MAXLINE] = "";
 static char svc_name[MAXLINE] = "radius";
 static int nasport = 111;
+
+static int nasporttype = 0;
+
 static UINT4 nas_ipaddr;
 static UINT4 auth_ipaddr;
 static int retries = 30;
@@ -314,6 +317,19 @@
     ptr += 4;
     total_length += 6;
 
+//Lets add NAS-PORT-TYPE
+
+    *ptr++ = PW_NAS_PORT_TYPE;
+    *ptr++ = 6;
+
+    ui = htonl(nasporttype);
+    memcpy(ptr, &ui, 4);
+    ptr += 4;
+    total_length += 6;
+
+
+//End Here//
+
     if (*identifier) {
 	int len = strlen(identifier);
 	*ptr++ = PW_NAS_ID;