-/***************************************************************************
- * Copyright (C) 2006 by Gerd v. Egidy *
- * gve@intra2net.com *
- * *
- * This library is free software; you can redistribute it and/or modify *
- * it under the terms of the GNU Lesser General Public License version *
- * 2.1 as published by the Free Software Foundation. *
- * *
- * This library is distributed in the hope that it will be useful, *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
- * GNU Lesser General Public License for more details. *
- * *
- * You should have received a copy of the GNU Lesser General Public *
- * License along with this program; if not, write to the *
- * Free Software Foundation, Inc., *
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
- ***************************************************************************/
+/*
+Copyright (C) 2006 by Intra2net AG - Gerd v. Egidy
+
+The software in this package is distributed under the GNU General
+Public License version 2 (with a special exception described below).
+
+A copy of GNU General Public License (GPL) is included in this distribution,
+in the file COPYING.GPL.
+
+As a special exception, if other files instantiate templates or use macros
+or inline functions from this file, or you compile this file and link it
+with other works to produce a work based on this file, this file
+does not by itself cause the resulting work to be covered
+by the GNU General Public License.
+
+However the source code for this file must still be made available
+in accordance with section (3) of the GNU General Public License.
+
+This exception does not invalidate any other reasons why a work based
+on this file might be covered by the GNU General Public License.
+*/
#include <stdio.h>
#include <errno.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/time.h>
+#include <sys/stat.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <netdb.h>
#include "socket_server.hxx"
#include "t2n_exception.hxx"
+#include "log.hxx"
using namespace std;
socket_server::socket_server(int port, const std::string& ip)
: server(), socket_handler(0,tcp_s)
{
- // TODO
+ /* Create the socket. */
+ sock = socket (PF_INET, SOCK_STREAM, 0);
+ if (sock < 0)
+ EXCEPTIONSTREAM(error,t2n_server_error,"error opening socket: " << strerror(errno));
+
+ set_socket_options(sock);
+
+ /* Give the socket a name. */
+ struct sockaddr_in sockaddr;
+ sockaddr.sin_family = AF_INET;
+ sockaddr.sin_port = htons(port);
+
+ if (inet_aton(ip.c_str(),&sockaddr.sin_addr) == 0)
+ EXCEPTIONSTREAM(error,t2n_server_error,"failed listening on invalid ip " << ip);
+
+ if (bind (sock, (struct sockaddr *) &sockaddr, sizeof (sockaddr)) < 0)
+ {
+ // FIXME: Calls virtual function socket_server::get_logstream() in constructor
+ EXCEPTIONSTREAM(error,t2n_server_error,"error binding socket: " << strerror(errno));
+ }
+
+ start_listening();
}
/** @brief create a new unix-socked-based server
{
unix_path=path;
+ // TODO: Every EXCEPTIONSTREAM in here calls virtual function get_logstream()
+
/* Create the socket. */
sock = socket (PF_UNIX, SOCK_STREAM, 0);
if (sock < 0)
- {
- string err="error opening socket: ";
- err+=strerror(errno);
- log(error, err);
- throw t2n_server_error(err);
- }
+ EXCEPTIONSTREAM(error,t2n_server_error,"error opening socket: " << strerror(errno));
set_socket_options(sock);
unlink (unix_name.sun_path);
if (bind (sock, (struct sockaddr *) &unix_name, sizeof (unix_name)) < 0)
- {
- string err="error binding socket: ";
- err+=strerror(errno);
- log(error, err);
- throw t2n_server_error(err);
- }
+ EXCEPTIONSTREAM(error,t2n_server_error,"error binding socket: " << strerror(errno));
/* change permissions */
if (chmod (unix_name.sun_path, filemode) != 0)
- {
- string err="error changing permission: ";
- err+=strerror(errno);
- log(error, err);
- throw t2n_server_error(err);
- }
+ EXCEPTIONSTREAM(error,t2n_server_error,"error changing permission: " << strerror(errno));
if (!user.empty() && !group.empty())
{
struct passwd *socket_user = getpwnam (user.c_str());
if (socket_user == NULL)
- {
- string err="error getting socket user: ";
- err+=strerror(errno);
- log(error, err);
- throw t2n_server_error(err);
- }
-
+ EXCEPTIONSTREAM(error,t2n_server_error,"error getting socket user: " << strerror(errno));
+
struct group *socket_group = getgrnam (group.c_str());
if (socket_group == NULL)
- {
- string err="error getting socket group: ";
- err+=strerror(errno);
- log(error, err);
- throw t2n_server_error(err);
- }
-
- if (chown (unix_name.sun_path, socket_user->pw_uid, socket_group->gr_gid) != 0)
- {
- string err="error changing socket ownership: ";
- err+=strerror(errno);
- log(error, err);
- throw t2n_server_error(err);
- }
- }
+ EXCEPTIONSTREAM(error,t2n_server_error,"error getting socket group: " << strerror(errno));
- if (listen (sock, 5) < 0)
- {
- string err="error listening to socket: ";
- err+=strerror(errno);
- log(error, err);
- throw t2n_server_error(err);
+ if (chown (unix_name.sun_path, socket_user->pw_uid, socket_group->gr_gid) != 0)
+ EXCEPTIONSTREAM(error,t2n_server_error,"error changing socket ownership: " << strerror(errno));
}
- /* clear & insert server sock into the fd_tab to prepare select */
- FD_ZERO(&connection_set);
- FD_SET (sock, &connection_set);
+ start_listening();
}
+/**
+ * Destructor
+ */
socket_server::~socket_server()
{
- socket_handler::close();
+ // close all client connections
+ server::close();
+
+ // server socket will be closed by destructor of socket_handler
if (get_type()==unix_s)
unlink(unix_path.c_str());
+
+ // disconnect connection<->server pointer
+ std::map<unsigned int, server_connection*>::iterator it, it_end = connections.end();
+ for (it = connections.begin(); it != it_end; ++it)
+ {
+ socket_server_connection *conn = dynamic_cast<socket_server_connection*>(it->second);
+ if (conn)
+ conn->my_server = NULL;
+ }
+}
+
+/// start listening on a new server socket (called by the constructors)
+void socket_server::start_listening()
+{
+ if (listen (sock, 5) < 0)
+ EXCEPTIONSTREAM(error,t2n_server_error,"error listening to socket: " << strerror(errno));
+
+ /* clear & insert server sock into the fd_tab to prepare select */
+ FD_ZERO(&connection_set);
+ FD_SET (sock, &connection_set);
+ sockets_set.insert(sock);
}
+/// handle a new connection from a client
void socket_server::new_connection()
{
struct sockaddr_un clientname;
int newsock = accept (sock,(struct sockaddr *) &clientname,&size);
if (newsock < 0)
{
- if (errno == EAGAIN)
+ // return on non-fatal errors (list taken from man-page)
+ if (errno == EAGAIN || errno == EWOULDBLOCK || errno == ECONNABORTED || errno == EINTR ||
+ errno == EMFILE || errno == ENFILE || errno == ENOBUFS || errno == ENOMEM ||
+ errno == EPROTO || errno == EPERM || errno == ETIMEDOUT)
{
- log(error, "accept error (EAGAIN): no connection waiting");
+ LOGSTREAM(error,"non-fatal accept error: " << strerror(errno));
return;
}
- /* default: break */
- string err="error accepting connection: ";
- err+=strerror(errno);
- log(error, err);
- throw t2n_server_error(err);
+ /* fatal error: will usually kill or restart the server */
+ EXCEPTIONSTREAM(error,t2n_server_error,"fatal error accepting connection: " << strerror(errno));
}
FD_SET (newsock, &connection_set);
+ sockets_set.insert(newsock);
socket_server_connection *nc=new socket_server_connection(newsock, get_type(), get_default_timeout());
nc->set_socket_options(newsock);
return;
}
-bool socket_server::fill_buffer(long long usec_timeout)
+/** @brief look for new connections and new data in any of the existing connections
+ @param usec_timeout wait until new data is found, max timeout usecs.
+ -1: wait endless
+ 0: return instantly
+ @param usec_timeout_remaining if non-NULL the function will write the
+ not used time to the given target
+ @retval true if new data was found (does not mean that the received data
+ is a complete packet though)
+*/
+bool socket_server::fill_buffer(long long usec_timeout,long long* usec_timeout_remaining)
{
fd_set used_fdset=connection_set;
int ret=select (FD_SETSIZE, &used_fdset, NULL, NULL, timeout_ptr);
+ // return the timeout we did not use
+ if (usec_timeout > 0 && usec_timeout_remaining != NULL)
+ *usec_timeout_remaining=(tval.tv_sec*1000000)+tval.tv_usec;
+
if (ret < 0)
{
if (errno == EINTR)
ret=0;
}
else
- {
- string err="select error: ";
- err+=strerror(errno);
- log(error, err);
- throw t2n_server_error(err);
- }
+ EXCEPTIONSTREAM(error,t2n_server_error,"select error: " << strerror(errno));
}
if (ret > 0)
return false;
}
+/// call fill_buffer() on all connections, called from fill_buffer()
bool socket_server::fill_connection_buffers()
{
- bool data_found;
+ bool data_found = false;
std::map<unsigned int, server_connection*>::iterator ie=connections.end();
for(std::map<unsigned int, server_connection*>::iterator i=connections.begin(); i != ie; i++)
if (!i->second->server_connection::is_closed())
- if (i->second->fill_buffer(0))
- data_found=true;
+ {
+ // shutdown all connections which throw exceptions to protect the server
+ try
+ {
+ if (i->second->fill_buffer(0))
+ data_found=true;
+ }
+ catch (t2n_transfer_error &e)
+ { i->second->close(); }
+ }
return data_found;
}
+/// remove the socket of a connection after the connection has been closed
void socket_server::remove_connection_socket(int sock)
{
FD_CLR(sock, &connection_set);
+ sockets_set.erase(sock);
}
-void socket_server_connection::log(log_level_values level, const char* message)
+/**
+ * Destructor
+ */
+socket_server_connection::~socket_server_connection()
{
- if(my_server)
+ // Only notify parent server about going down.
+ // The real socket will be closed by the destructor of the base classes.
+ if (my_server && sock != -1)
{
- ostringstream msg;
- msg << "connection id " << get_id() << ": " << message;
- my_server->log(level,msg.str().c_str());
+ socket_server *srv = dynamic_cast<socket_server*>(my_server);
+ if (srv)
+ srv->remove_connection_socket(sock);
}
}
+/// close this connection. complete data waiting in the buffer can still be retrieved.
void socket_server_connection::close()
{
- if (!server_connection::is_closed())
+ if (my_server && sock != -1)
{
- socket_handler::close();
- server_connection::close();
+ socket_server *srv = dynamic_cast<socket_server*>(my_server);
+ if (srv)
+ srv->remove_connection_socket(sock);
}
- if (my_server)
+ if (!server_connection::is_closed())
{
- dynamic_cast<socket_server*>(my_server)->remove_connection_socket(sock);
+ socket_handler::close();
+ server_connection::close();
}
}
+bool socket_server_connection::fill_buffer(long long usec_timeout,long long* usec_timeout_remaining)
+{
+ bool new_data = socket_handler::fill_buffer(buffer,usec_timeout,usec_timeout_remaining);
+ if (new_data)
+ reset_timeout();
+ return new_data;
+}
}
git://developer.intra2net.com / libt2n / blobdiff