From 499756bcf8ba63adff4debb29776e59848af5f7d Mon Sep 17 00:00:00 2001
From: Cathy Fitzpatrick <cathy@cathyjf.com>
Date: Sun, 24 Oct 2010 14:46:45 -0600
Subject: [PATCH] Added user limit.

---
 src/main/main.cpp       | 10 +++++++---
 src/network/network.cpp | 15 +++++++++++----
 src/network/network.h   |  2 +-
 3 files changed, 19 insertions(+), 8 deletions(-)

diff --git a/src/main/main.cpp b/src/main/main.cpp
index 00efee9..722f946 100644
--- a/src/main/main.cpp
+++ b/src/main/main.cpp
@@ -55,7 +55,7 @@ const char *getPidFileName() {
 
 int initialise(int argc, char **argv, bool &daemon) {
     string configFile;
-    int port, databasePort, workerThreads, serverUid;
+    int port, databasePort, workerThreads, serverUid, userLimit;
     string serverName, welcomeFile, welcomeMessage;
     string databaseName, databaseHost, databaseUser, databasePassword;
     string authParameter, loginParameter, registerParameter;
@@ -80,6 +80,10 @@ int initialise(int argc, char **argv, bool &daemon) {
                 po::value<int>(&port)->default_value(
                      8446),
                 "server port")
+            ("server.limit",
+                po::value<int>(&userLimit)->default_value(
+                     -1),
+                "maximum number of users allowed")
             ("server.threads",
                 po::value<int>(&workerThreads)->default_value(
                      20),
@@ -88,7 +92,7 @@ int initialise(int argc, char **argv, bool &daemon) {
                 po::value<int>(&serverUid),
                 "UID to run the server process as")
             ("auth.salt",
-                "use simple simple authentication")
+                "use simple salt authentication")
             ("auth.vbulletin",
                 po::value<string>(
                     &authParameter)->implicit_value("vbulletin"),
@@ -278,7 +282,7 @@ int initialise(int argc, char **argv, bool &daemon) {
         }
     }
 
-    network::Server server(port);
+    network::Server server(port, userLimit);
     server.installSignalHandlers();
 
     ScriptMachine *machine = server.getMachine();
diff --git a/src/network/network.cpp b/src/network/network.cpp
index e2f12b9..a78c5c8 100644
--- a/src/network/network.cpp
+++ b/src/network/network.cpp
@@ -627,7 +627,7 @@ typedef pair<string, string> CLAUSE_PAIR;
 
 class ServerImpl {
 public:
-    ServerImpl(Server *, const int);
+    ServerImpl(Server *, const int, const int);
     Server *getServer() const { return m_server; }
     void installSignalHandlers();
     void run();
@@ -697,6 +697,7 @@ class ServerImpl {
     ChannelPtr m_mainChannel;
     CLIENT_LIST m_clients;
     int m_population;
+    const int m_userLimit;
     shared_mutex m_clientMutex;
     io_service m_service;
     tcp::acceptor m_acceptor;
@@ -717,8 +718,8 @@ class ServerImpl {
 
 ServerImpl *ServerImpl::m_blockingServer = NULL;
 
-Server::Server(const int port) {
-    m_impl = new ServerImpl(this, port);
+Server::Server(const int port, const int userLimit) {
+    m_impl = new ServerImpl(this, port, userLimit);
 }
 
 void Server::installSignalHandlers() {
@@ -2099,8 +2100,9 @@ ServerImpl::ClauseList::ClauseList(vector<CLAUSE_PAIR> &clauses)
     finalise();
 }
 
-ServerImpl::ServerImpl(Server *server, const int port):
+ServerImpl::ServerImpl(Server *server, const int port, const int userLimit):
             m_population(0),
+            m_userLimit(userLimit),
             m_acceptor(m_service, tcp::endpoint(tcp::v4(), port), true),
             m_server(server) {
     acceptClient();
@@ -2380,6 +2382,11 @@ void ServerImpl::handleAccept(ClientImplPtr client,
                 << error.message() << endl;
         return;
     }
+    if (m_population > m_userLimit) {
+        boost::system::error_code ec;
+        client->getSocket().close(ec);
+        return;
+    }
     const boost::system::error_code startError = client->start();
     if (startError) {
         Log::out() << "Error in ClientImpl::start(): "
diff --git a/src/network/network.h b/src/network/network.h
index 4ebd0d8..6e7d656 100644
--- a/src/network/network.h
+++ b/src/network/network.h
@@ -68,7 +68,7 @@ class Client {
 
 class Server {
 public:
-    Server(const int port);
+    Server(const int port, const int userLimit);
     ~Server();
     void installSignalHandlers();
     void run();