diff --git a/sim/sim.py b/sim/sim.py
index 661ecb3..e8248ac 100755
--- a/sim/sim.py
+++ b/sim/sim.py
@@ -1,24 +1,29 @@
 #!/usr/bin/env python3
 
-import sys
 import socket
 import os
 from time import sleep
+import argparse
 
 
-DEST = ("127.0.0.1", 4200)
-FNAME = 1
+DEST = "127.0.0.1"
 
 
-def main(fname):
-    with open(os.path.join(os.path.dirname(__file__), fname), "r") as f:
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("file")
+    parser.add_argument("port", type=int, default=4200)
+    parser.add_argument("rate", type=float, default=1)
+    args = parser.parse_args()
+
+    with open(os.path.join(os.path.dirname(args.file), args.file), "r") as f:
         lines = [line.rstrip().encode("UTF-8") for line in f]
     sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
     while True:
         for line in lines:
-            sock.sendto(line, DEST)
-            sleep(1)
+            sock.sendto(line, (DEST, args.port))
+            sleep(args.rate)
 
 
 if __name__ == '__main__':
-    main(sys.argv[FNAME])
+    main()
diff --git a/src/Dockerfile b/src/Dockerfile
index b3b021a..b070e18 100644
--- a/src/Dockerfile
+++ b/src/Dockerfile
@@ -1,6 +1,8 @@
 FROM scratch
 
 ADD csyslog /csyslog
+ADD GeoLiteCity.dat /
+ADD GeoLiteCityv6.dat /
 
 STOPSIGNAL 9
 
diff --git a/src/geo.c b/src/geo.c
index c8c2483..e25519d 100644
--- a/src/geo.c
+++ b/src/geo.c
@@ -36,7 +36,6 @@ const char* geo_country_name(GeoIPRecord* rec) {
 }
 
 #ifdef TEST
-
 static const char * _mk_NA( const char * p ){
     return p ? p : "N/A";
 }
@@ -44,7 +43,7 @@ static const char * _mk_NA( const char * p ){
 int main(int argc, char** argv) {
     geo_init();
     char* host = "24.4.129.164";
-    char* host6 = "2601:647:4701:733:5bf:f3c2:f2b2:9c1f";
+    // char* host6 = "2601:647:4701:733:5bf:f3c2:f2b2:9c1f";
 
     GeoIPRecord *gir = GeoIP_record_by_name(gi, (const char *) host);  // GeoIP_record_by_name_v6
     // GeoIPRecord *gir = GeoIP_record_by_name_v6(gi, (const char *) host6);
@@ -64,5 +63,4 @@ int main(int argc, char** argv) {
 
     geo_close();
 }
-
 #endif
diff --git a/src/main.c b/src/main.c
index 6d5023d..e514b92 100644
--- a/src/main.c
+++ b/src/main.c
@@ -15,7 +15,7 @@ int main(int argc, char** argv) {
     char* portend;
     unsigned int portl;
     portl = strtol(argv[1], &portend, 10);
-    if (portend == NULL) {
+    if (portend == NULL || portend == argv[1]) {
         fprintf(stderr, "usage: %s <port>\n", argv[0]);
         exit(1);
     }
diff --git a/src/server.c b/src/server.c
index 1e80b64..d30276f 100644
--- a/src/server.c
+++ b/src/server.c
@@ -1,7 +1,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/socket.h>
-#include <netinet/in.h>
 #include <string.h>
 #include <unistd.h>
 #include <signal.h>
@@ -40,7 +39,6 @@ void sig_handler(int signum) {
 
 
 int submit_events(char* message) {
-    // Send it
     if(put_events(message, "http://192.168.1.120:8298") == 0) {
         return 0;
     } else {
@@ -51,6 +49,10 @@ int submit_events(char* message) {
 
 
 char* collect_buffer(int max_size, int* howmany) {
+    /*
+    Pop up to $howmany items from the message buffer and allocate a buffer of at most $max_size bytes containing them.
+    Returns a char pointer to the buffer
+    */
     char header[72];
     // sprintf(header, "{\"index\": {\"_index\": \"firewall-test\", \"_type\": \"event\"}}\n");
     sprintf(header, "{\"index\": {\"_index\": \"firewall-%04d.%02d.%02d\", \"_type\": \"event\"}}\n",
@@ -89,7 +91,9 @@ char* collect_buffer(int max_size, int* howmany) {
 
 
 void* buffer_watch() {
-    /*flush the buffer when larger than 10 messages or older than 5 seconds*/
+    /*
+    Threaded task that flushes the buffer when it is larger than 10 messages or older than 5 seconds
+    */
     time_t last_flush = time(NULL);
     char* buffer = NULL;
     while(running) {
@@ -125,6 +129,9 @@ void* buffer_watch() {
 
 
 void start_bufwatch() {
+    /*
+    Start the bufwatch thread
+    */
     if (pthread_mutex_init(&buflock, NULL) != 0) {
         printf("\n mutex init failed\n");
         exit(1);
@@ -262,5 +269,5 @@ int run_server(int port) {
     bufwatch_cleanup();
     buff_freeall();
     geo_close();
-    return 1;
+    return 0;
 }