Merge branch 'epolletc'

CMakeLists.txt

@@ -24,6 +24,12 @@ include_directories(${ICONV_INCLUDE_DIR})
 # coming from these headers.
 include_directories(SYSTEM ${CRYPTO++_INCLUDE_DIR})
 
+set(POLLER "POLL" CACHE STRING
+  "Choose the poller between POLL and EPOLL (Linux-only)")
+if((NOT ${POLLER} MATCHES "POLL") AND
+    (NOT ${POLLER} MATCHES "EPOLL"))
+  message(FATAL_ERROR "POLLER must be either POLL or EPOLL")
+endif()
 #
 ## utils
 #
@@ -95,4 +101,4 @@ target_link_libraries(test
   utils
   config)
 
-CONFIGURE_FILE(config.h.cmake src/config.h @ONLY)
+configure_file(config.h.cmake src/config.h)

config.h.cmake

@@ -1 +1,2 @@
 #cmakedefine ICONV_SECOND_ARGUMENT_IS_CONST
+#cmakedefine POLLER ${POLLER}

src/irc/irc_client.cpp

@@ -222,6 +222,27 @@ void IrcClient::on_channel_message(const IrcMessage& message)
   this->bridge->send_message(iid, nick, body, muc);
 }
 
+void IrcClient::empty_motd(const IrcMessage& message)
+{
+  (void)message;
+  this->motd.erase();
+}
+
+void IrcClient::on_motd_line(const IrcMessage& message)
+{
+  const std::string body = message.arguments[1];
+  // We could send the MOTD without a line break between each IRC-message,
+  // but sometimes it contains some ASCII art, we use line breaks to keep
+  // them intact.
+  this->motd += body+"\n";
+}
+
+void IrcClient::send_motd(const IrcMessage& message)
+{
+  (void)message;
+  this->bridge->send_xmpp_message(this->hostname, "", this->motd);
+}
+
 void IrcClient::on_topic_received(const IrcMessage& message)
 {
   const std::string chan_name = message.arguments[1];

src/irc/irc_client.hpp

@@ -99,6 +99,18 @@ public:
    * Forward the server message received from IRC to the XMPP component
    */
   void forward_server_message(const IrcMessage& message);
+  /**
+   * Just empty the motd we kept as a string
+   */
+  void empty_motd(const IrcMessage& message);
+  /**
+   * Send the MOTD string as one single "big" message
+   */
+  void send_motd(const IrcMessage& message);
+  /**
+   * Append this line to the MOTD
+   */
+  void on_motd_line(const IrcMessage& message);
   /**
    * Forward the join of an other user into an IRC channel, and save the
    * IrcUsers in the IrcChannel
@@ -172,6 +184,11 @@ private:
    */
   std::vector<std::string> channels_to_join;
   bool welcomed;
+  /**
+   * Each motd line received is appended to this string, which we send when
+   * the motd is completely received
+   */
+  std::string motd;
   IrcClient(const IrcClient&) = delete;
   IrcClient(IrcClient&&) = delete;
   IrcClient& operator=(const IrcClient&) = delete;
@@ -186,8 +203,12 @@ typedef void (IrcClient::*irc_callback_t)(const IrcMessage&);
 
 static const std::unordered_map<std::string, irc_callback_t> irc_callbacks = {
   {"NOTICE", &IrcClient::forward_server_message},
-  {"375", &IrcClient::forward_server_message},
-  {"372", &IrcClient::forward_server_message},
+  {"RPL_MOTDSTART", &IrcClient::empty_motd},
+  {"375", &IrcClient::empty_motd},
+  {"RPL_MOTD", &IrcClient::on_motd_line},
+  {"372", &IrcClient::on_motd_line},
+  {"RPL_MOTDEND", &IrcClient::send_motd},
+  {"376", &IrcClient::send_motd},
   {"JOIN", &IrcClient::on_channel_join},
   {"PRIVMSG", &IrcClient::on_channel_message},
   {"353", &IrcClient::set_and_forward_user_list},

src/network/poller.cpp

@@ -12,6 +12,13 @@ Poller::Poller()
 #if POLLER == POLL
   memset(this->fds, 0, sizeof(this->fds));
   this->nfds = 0;
+#elif POLLER == EPOLL
+  this->epfd = ::epoll_create1(0);
+  if (this->epfd == -1)
+    {
+      perror("epoll");
+      throw std::runtime_error("Could not create epoll instance");
+    }
 #endif
 }
 
@@ -36,6 +43,17 @@ void Poller::add_socket_handler(std::shared_ptr<SocketHandler> socket_handler)
   this->fds[this->nfds].events = POLLIN;
   this->nfds++;
 #endif
+#if POLLER == EPOLL
+  struct epoll_event event;
+  event.data.ptr = socket_handler.get();
+  event.events = EPOLLIN;
+  const int res = ::epoll_ctl(this->epfd, EPOLL_CTL_ADD, socket_handler->get_socket(), &event);
+  if (res == -1)
+    {
+      perror("epoll_ctl");
+      throw std::runtime_error("Could not add socket to epoll");
+    }
+#endif
 }
 
 void Poller::remove_socket_handler(const socket_t socket)
@@ -44,6 +62,8 @@ void Poller::remove_socket_handler(const socket_t socket)
   if (it == this->socket_handlers.end())
     throw std::runtime_error("Trying to remove a SocketHandler that is not managed");
   this->socket_handlers.erase(it);
+
+#if POLLER == POLL
   for (size_t i = 0; i < this->nfds; i++)
     {
       if (this->fds[i].fd == socket)
@@ -58,9 +78,17 @@ void Poller::remove_socket_handler(const socket_t socket)
           this->nfds--;
         }
     }
+#elif POLLER == EPOLL
+  const int res = ::epoll_ctl(this->epfd, EPOLL_CTL_DEL, socket, nullptr);
+  if (res == -1)
+    {
+      perror("epoll_ctl");
+      throw std::runtime_error("Could not remove socket from epoll");
+    }
+#endif
 }
 
-void Poller::watch_send_events(const SocketHandler* const socket_handler)
+void Poller::watch_send_events(SocketHandler* socket_handler)
 {
 #if POLLER == POLL
   for (size_t i = 0; i <= this->nfds; ++i)
@@ -71,11 +99,21 @@ void Poller::watch_send_events(const SocketHandler* const socket_handler)
           return;
         }
     }
-#endif
   throw std::runtime_error("Cannot watch a non-registered socket for send events");
+#elif POLLER == EPOLL
+  struct epoll_event event;
+  event.data.ptr = socket_handler;
+  event.events = EPOLLIN|EPOLLOUT;
+  const int res = ::epoll_ctl(this->epfd, EPOLL_CTL_MOD, socket_handler->get_socket(), &event);
+  if (res == -1)
+    {
+      perror("epoll_ctl");
+      throw std::runtime_error("Could not modify socket flags in epoll");
+    }
+#endif
 }
 
-void Poller::stop_watching_send_events(const SocketHandler* const socket_handler)
+void Poller::stop_watching_send_events(SocketHandler* socket_handler)
 {
 #if POLLER == POLL
   for (size_t i = 0; i <= this->nfds; ++i)
@@ -86,8 +124,18 @@ void Poller::stop_watching_send_events(const SocketHandler* const socket_handler
           return;
         }
     }
-#endif
   throw std::runtime_error("Cannot watch a non-registered socket for send events");
+#elif POLLER == EPOLL
+  struct epoll_event event;
+  event.data.ptr = socket_handler;
+  event.events = EPOLLIN;
+  const int res = ::epoll_ctl(this->epfd, EPOLL_CTL_MOD, socket_handler->get_socket(), &event);
+  if (res == -1)
+    {
+      perror("epoll_ctl");
+      throw std::runtime_error("Could not modify socket flags in epoll");
+    }
+#endif
 }
 
 bool Poller::poll()
@@ -121,6 +169,23 @@ bool Poller::poll()
           res--;
         }
     }
+#elif POLLER == EPOLL
+  static const size_t max_events = 12;
+  struct epoll_event revents[max_events];
+  const int nb_events = epoll_wait(this->epfd, revents, max_events, -1);
+  if (nb_events == -1)
+    {
+      perror("epoll_wait");
+      throw std::runtime_error("Epoll_wait failed");
+    }
+  for (int i = 0; i < nb_events; ++i)
+    {
+      auto socket_handler = static_cast<SocketHandler*>(revents[i].data.ptr);
+      if (revents[i].events & EPOLLIN)
+        socket_handler->on_recv();
+      if (revents[i].events & EPOLLOUT)
+        socket_handler->on_send();
+    }
 #endif
   return true;
 }

src/network/poller.hpp

@@ -9,27 +9,29 @@
 #define POLL 1
 #define EPOLL 2
 #define KQUEUE 3
-
+#include <config.h>
+#ifndef POLLER
  #define POLLER POLL
+#endif
 
 #if POLLER == POLL
  #include <poll.h>
- // TODO, dynamic size, without artificial limit
  #define MAX_POLL_FD_NUMBER 4096
+#elif POLLER == EPOLL
+  #include <sys/epoll.h>
+#else
+  #error Invalid POLLER value
 #endif
 
 /**
- * We pass some SocketHandlers to this the Poller, which uses
+ * We pass some SocketHandlers to this Poller, which uses
  * poll/epoll/kqueue/select etc to wait for events on these SocketHandlers,
  * and call the callbacks when event occurs.
  *
- * TODO: support for all these pollers:
- * - poll(2) (mandatory)
- * - epoll(7)
+ * TODO: support these pollers:
  * - kqueue(2)
  */
 
-
 class Poller
 {
 public:
@@ -48,12 +50,12 @@ public:
    * Signal the poller that he needs to watch for send events for the given
    * SocketHandler.
    */
-  void watch_send_events(const SocketHandler* const socket_handler);
+  void watch_send_events(SocketHandler* socket_handler);
   /**
    * Signal the poller that he needs to stop watching for send events for
    * this SocketHandler.
    */
-  void stop_watching_send_events(const SocketHandler* const socket_handler);
+  void stop_watching_send_events(SocketHandler* socket_handler);
   /**
    * Wait for all watched events, and call the SocketHandlers' callbacks
    * when one is ready.
@@ -72,6 +74,8 @@ private:
 #if POLLER == POLL
   struct pollfd fds[MAX_POLL_FD_NUMBER];
   nfds_t nfds;
+#elif POLLER == EPOLL
+  int epfd;
 #endif
 
   Poller(const Poller&) = delete;