Merge pull request #534 from kiwix/ipLimit

Add ip connection limit option

src/server/kiwix-serve.cpp

@@ -49,31 +49,32 @@ void usage()
             << std::endl
 
             << "Purpose:" << std::endl
-            << "\tDeliver ZIM file articles via HTTP"
+            << "\tDeliver ZIM file(s) articles via HTTP"
             << std::endl << std::endl
 
             << "Mandatory arguments:" << std::endl
-            << "\tLIBRARY_PATH\t\tis the XML library file path listing ZIM file to serve. To be used only with the --library argument."
+            << "\tLIBRARY_PATH\t\tXML library file path listing ZIM file to serve. To be used only with the --library argument."
             << std::endl
-            << "\tZIM_PATH\t\tis the path of a ZIM file."
+            << "\tZIM_PATH\t\tZIM file path(s)"
             << std::endl << std::endl
 
             << "Optional arguments:" << std::endl << std::endl
-            << "\t-h, --help\t\tprint this help" << std::endl << std::endl
+            << "\t-h, --help\t\tPrint this help" << std::endl << std::endl
-            << "\t-a, --attachToProcess\texit if given process id is not running anymore" << std::endl
+            << "\t-a, --attachToProcess\tWxit if given process id is not running anymore" << std::endl
-            << "\t-d, --daemon\t\tdetach the HTTP server daemon from the main process" << std::endl
+            << "\t-d, --daemon\t\tDetach the HTTP server daemon from the main process" << std::endl
-            << "\t-i, --address\t\tlisten only on this ip address, all available ones otherwise" << std::endl
+            << "\t-i, --address\t\tListen only on this ip address, all available ones otherwise" << std::endl
-            << "\t-M, --monitorLibrary\t\tmonitor the XML library file and reload it automatically" << std::endl
+            << "\t-M, --monitorLibrary\tMonitor the XML library file and reload it automatically" << std::endl
-            << "\t-m, --nolibrarybutton\tdo not print the builtin home button in the builtin top bar overlay" << std::endl
+            << "\t-m, --nolibrarybutton\tDon't print the builtin home button in the builtin top bar overlay" << std::endl
-            << "\t-n, --nosearchbar\tdo not print the builtin bar overlay on the top of each served page" << std::endl
+            << "\t-n, --nosearchbar\tDon't print the builtin bar overlay on the top of each served page" << std::endl
-            << "\t-b, --blockexternal\tprevent users from directly accessing external links" << std::endl
+            << "\t-b, --blockexternal\tPrevent users from directly accessing external links" << std::endl
             << "\t-p, --port\t\tTCP port on which to listen to HTTP requests (default: 80)" << std::endl
             << "\t-r, --urlRootLocation\tURL prefix on which the content should be made available (default: /)" << std::endl
-            << "\t-t, --threads\t\tnumber of threads to run in parallel (default: " << DEFAULT_THREADS << ")" << std::endl
+            << "\t-t, --threads\t\tNumber of threads to run in parallel (default: " << DEFAULT_THREADS << ")" << std::endl
-            << "\t-v, --verbose\t\tprint debug log to STDOUT" << std::endl
+            << "\t-v, --verbose\t\tPrint debug log to STDOUT" << std::endl
-            << "\t-V, --version\t\tprint software version" << std::endl
+            << "\t-V, --version\t\tPrint software version" << std::endl
-            << "\t-z, --nodatealiases\tcreate URL aliases for each content by removing the date" << std::endl
+            << "\t-z, --nodatealiases\tCreate URL aliases for each content by removing the date" << std::endl
-            << "\t-c, --customIndex\tadd path to custom index.html for welcome page" << std::endl
+            << "\t-c, --customIndex\tAdd path to custom index.html for welcome page" << std::endl
+            << "\t-L, --ipConnectionLimit\tMax number of (concurrent) connections per IP (default: infinite, recommended: >= 6)" << std::endl
             << std::endl
 
             << "Documentation:" << std::endl
@@ -202,6 +203,7 @@ int main(int argc, char** argv)
   bool isVerboseFlag = false;
   bool monitorLibrary = false;
   unsigned int PPID = 0;
+  int ipConnectionLimit = 0;
 
   static struct option long_options[]
       = {{"daemon", no_argument, 0, 'd'},
@@ -220,13 +222,14 @@ int main(int argc, char** argv)
          {"urlRootLocation", required_argument, 0, 'r'},
          {"customIndex", required_argument, 0, 'c'},
          {"monitorLibrary", no_argument, 0, 'M'},
+         {"ipConnectionLimit", required_argument, 0, 'L'},
          {0, 0, 0, 0}};
 
   /* Argument parsing */
   while (true) {
     int option_index = 0;
     int c
-        = getopt_long(argc, argv, "hzmnbdvVla:p:f:t:r:i:c:M", long_options, &option_index);
+        = getopt_long(argc, argv, "hzmnbdvVla:p:f:t:r:i:c:ML:", long_options, &option_index);
 
     if (c != -1) {
       switch (c) {
@@ -278,6 +281,9 @@ int main(int argc, char** argv)
         case 'M':
           monitorLibrary = true;
           break;
+        case 'L':
+          ipConnectionLimit = atoi(optarg);
+          break;
       }
     } else {
       if (optind < argc) {
@@ -364,6 +370,7 @@ int main(int argc, char** argv)
   server.setTaskbar(!noSearchBarFlag, !noLibraryButtonFlag);
   server.setBlockExternalLinks(blockExternalLinks);
   server.setIndexTemplateString(indexTemplateString);
+  server.setIpConnectionLimit(ipConnectionLimit);
 
   if (! server.start()) {
     exit(1);