Export remote_number into REMOTENUMBER environment variable.

pppd/auth.c

@@ -492,6 +492,7 @@ ppp_set_remote_number(const char *buf)
 {
     if (buf) {
         strlcpy(remote_number, buf, sizeof(remote_number));
+        ppp_script_setenv("REMOTENUMBER", remote_number, 0);
     }
 }
 

pppd/main.c

@@ -852,6 +852,8 @@ set_ifunit(int iskey)
 	create_pidfile(getpid());	/* write pid to file */
 	create_linkpidfile(getpid());
     }
+    if (*remote_number)
+        ppp_script_setenv("REMOTENUMBER", remote_number, 0);
     run_net_script(path_net_init, 1);
 }
 

pppd/pppd.8

@@ -1780,6 +1780,12 @@ set when IPV6CP has come up.
 The authenticated name of the peer.  This is only set if the peer
 authenticates itself.
 .TP
+.B REMOTENUMBER
+The remote's number as provided to pppd by the remotenumber option.  The
+meaning of this varies based on the type of connection, xl2tpd for example can
+either provide the dialing number AVP or the remote's IP address.  pppoe-server
+typically provides the MAC address.
+.TP
 .B SPEED
 The baud rate of the tty device.
 .TP