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server.h

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00001 #ifndef WIBBLE_NET_SERVER_H
00002 #define WIBBLE_NET_SERVER_H
00003 
00004 /*
00005  * net/server - Network server infrastructure
00006  *
00007  * Copyright (C) 2010  Enrico Zini <enrico@enricozini.org>
00008  *
00009  * This library is free software; you can redistribute it and/or
00010  * modify it under the terms of the GNU Lesser General Public
00011  * License as published by the Free Software Foundation; either
00012  * version 2.1 of the License, or (at your option) any later version.
00013  *
00014  * This library is distributed in the hope that it will be useful,
00015  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00016  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017  * Lesser General Public License for more details.
00018  *
00019  * You should have received a copy of the GNU Lesser General Public
00020  * License along with this library; if not, write to the Free Software
00021  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
00022  */
00023 
00024 #include <string>
00025 #include <vector>
00026 #include <signal.h>
00027 
00028 namespace wibble {
00029 namespace net {
00030 
00034 struct Server
00035 {
00036     // Human readable server hostname
00037     std::string host;
00038     // Human readable server port
00039     std::string port;
00040     // Type of server socket (default SOCK_STREAM)
00041     int socktype;
00042     // Server socket
00043     int sock;
00044 
00045     // Saved signal handlers before accept
00046     struct sigaction *old_signal_actions;
00047     // Signal handlers in use during accept
00048     struct sigaction *signal_actions;
00049 
00050     Server();
00051     ~Server();
00052 
00053     // Bind to a given port (and optionally interface hostname)
00054     void bind(const char* port, const char* host=NULL);
00055 
00056     // Set socket to listen, with given backlog
00057     void listen(int backlog = 16);
00058 
00059     // Set FD_CLOEXEC option on master socket, so it does not propagate to
00060     // children. The master socket is not FD_CLOEXEC by default.
00061     void set_sock_cloexec();
00062 };
00063 
00064 struct TCPServer : public Server
00065 {
00066     // Signals used to stop the server's accept loop
00067     std::vector<int> stop_signals;
00068 
00069     TCPServer();
00070     virtual ~TCPServer();
00071 
00077     int accept_loop();
00078 
00079     virtual void handle_client(int sock, const std::string& peer_hostname, const std::string& peer_hostaddr, const std::string& peer_port) = 0;
00080 
00081 protected:
00082     static void signal_handler(int sig);
00083     static int last_signal;
00084 
00085     // Initialize signal handling structures
00086     void signal_setup();
00087     void signal_install();
00088     void signal_uninstall();
00089 };
00090 
00091 }
00092 }
00093 
00094 // vim:set ts=4 sw=4:
00095 #endif

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