dnsmasq files written and HUP sent

dhcp-hosts.dpto2

@@ -11,7 +11,7 @@ ff:ff:ff:ff:ff:fe,10.6.122.10
 ff:ff:ff:ff:ff:fe,10.6.122.11
 ff:ff:ff:ff:ff:fe,10.6.122.12
 ff:ff:ff:ff:ff:fe,10.6.122.13
-# { "reserved-by": "WiFi dpto2", "locked": true }
+# {"locked": true, "reserved-by": "WiFi dpto2"}
 ff:ff:ff:ff:ff:fe,10.6.122.14
 ff:ff:ff:ff:ff:fe,10.6.122.15
 ff:ff:ff:ff:ff:fe,10.6.122.16
@@ -96,12 +96,14 @@ ff:ff:ff:ff:ff:fe,10.6.122.94
 ff:ff:ff:ff:ff:fe,10.6.122.95
 # {"reserved-by": "Andy"}
 00:23:54:8c:65:13,10.6.122.96,set:client0023548c6513
+# {"reserved-by": "Somoza"}
 ff:ff:ff:ff:ff:fe,10.6.122.97
 ff:ff:ff:ff:ff:fe,10.6.122.98
+# {"reserved-by": "Zelda"}
 ff:ff:ff:ff:ff:fe,10.6.122.99
 ff:ff:ff:ff:ff:fe,10.6.122.100
 # {"reserved-by": "Andy"}
-aa:bb:cc:dd:ee:ff,10.6.122.101,set:clientaabbccddeeff
+12:24:42:23:24:45,10.6.122.101,set:client122442232445
 ff:ff:ff:ff:ff:fe,10.6.122.102
 ff:ff:ff:ff:ff:fe,10.6.122.103
 ff:ff:ff:ff:ff:fe,10.6.122.104
@@ -240,4 +242,3 @@ ff:ff:ff:ff:ff:fe,10.6.122.251
 ff:ff:ff:ff:ff:fe,10.6.122.252
 ff:ff:ff:ff:ff:fe,10.6.122.253
 ff:ff:ff:ff:ff:fe,10.6.122.254
-ff:ff:ff:ff:ff:fe,10.6.122.255

dhcp-opts.dpto2

@@ -1,3 +1,2 @@
-tag:client5cf9ffffffff,option:router,10.0.0.1
-tag:clientaabbccddeeff,option:router,10.6.122.96
-tag:client0023548c6513,option:router,10.6.122.2
+tag:client0023548c6513,option:router,10.6.122.96
+tag:client122442232445,option:router,10.6.122.2

main.py

@@ -46,7 +46,10 @@ exclusive_lock = Lock(lock_file)
 shared_lock = SharedLock(lock_file)
 
 def reload_freeradius():
-    call("./reload_freeradius")
+    call("./sendhup freeradius")
+
+def reload_dnsmasq():
+    call("./sendhup dnsmasq")
 
 def delete_user(deluser):
     f = open(users_file)
@@ -303,9 +306,11 @@ def parse_macs(macs):
     return r
 
 def write_dhcp_files(ipmap):
+    timestamp = time.time()
     tempfile = "{}.{}".format(dhcp_hosts_file, timestamp)
-    f = open(tempfile,"w")
+    with open(tempfile,"w") as f:
         prefix = ipmap["prefix"]
+        gws = {}
         for i in range(1,255):
             ip = ipmap[i]
             if ip.dhcp_pool:
@@ -316,18 +321,30 @@ def write_dhcp_files(ipmap):
                     meta['reserved-by'] = ip.reserved_by
                 if ip.locked:
                     meta['locked'] = True
-            print("# " + json.dumps(meta))
+                print("# " + json.dumps(meta), file=f)
             if len(ip.macs) == 0:
                 macs = impossible_mac
             else:
                 macs = ",".join(ip.macs)
-        tag = ""
+            settag = ""
             if ip.gw and len(ip.macs) > 0:
-            tag = ",set:client" + ip.macs[0].replace(":","").lower()
-        print("{},{}.{}{}".format(macs,prefix,i,tag))
-    f.close()
+                tag = "client" + ip.macs[0].replace(":","").lower()
+                settag = ",set:" + tag
+                gws[tag] = ip.gw
+            print("{},{}.{}{}".format(macs,prefix,i,settag), file=f)
     shutil.move(tempfile, dhcp_hosts_file)
+    shutil.copy(dhcp_hosts_file, tempfile)
 
+    # Write custom gateways file
+    tempfile = "{}.{}".format(dhcp_opts_file, timestamp)
+    with open(tempfile,"w") as f:
+        for tag in gws:
+            print(
+                "tag:{},option:router,{}".format(tag,gws[tag]),
+                file=f,
+            )
+    shutil.move(tempfile, dhcp_opts_file)
+    shutil.copy(dhcp_opts_file, tempfile)
 
 @app.route("/ip/<int:last_byte>", methods=['GET', 'POST'])
 @login_required
@@ -347,7 +364,7 @@ def ip(last_byte):
         dhcp_pool = request.form.get('dhcp-client', '') == 'pool'
         macs = parse_macs(request.form.get('dhcp-client-mac', ''))
         gw = request.form.get('dhcp-gw','')[:15]
-        gw = gw if ip_re.match(gw) else ''
+        gw = gw if ip_re.match(gw) else None
 
         with exclusive_lock:
             ipmap = load_ips()
@@ -360,6 +377,7 @@ def ip(last_byte):
                     gw=gw,
                 )
                 write_dhcp_files(ipmap)
+                reload_dnsmasq()
 
         return redirect(url_for('ips'))
     else:

reload_freeradius.c

@@ -1,7 +0,0 @@
-#include <stdlib.h>
-
-int main()
-{
-    //system("/etc/init.d/freeradius reload");
-    system("pkill -HUP freeradius");
-}

sendhup.cpp

@@ -0,0 +1,13 @@
+#include <iostream>
+#include <sstream>
+#include <stdlib.h>
+
+int main(int argc, char *argv[])
+{
+    if (argc < 2)
+        return 0;
+    std::ostringstream s;
+    s << "pkill -HUP " << argv[1];
+    //system("/etc/init.d/freeradius reload");
+    system(s.str().c_str());
+}