1 /***************************************************************************
2 * Copyright (C) 2006 by Gerd v. Egidy *
5 * This library is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU Lesser General Public License version *
7 * 2.1 as published by the Free Software Foundation. *
9 * This library is distributed in the hope that it will be useful, *
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
12 * GNU Lesser General Public License for more details. *
14 * You should have received a copy of the GNU Lesser General Public *
15 * License along with this program; if not, write to the *
16 * Free Software Foundation, Inc., *
17 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
18 ***************************************************************************/
24 #include <sys/types.h>
25 #include <sys/socket.h>
28 #include <arpa/inet.h>
29 #include <netinet/in.h>
38 #include "socket_client.hxx"
39 #include "t2n_exception.hxx"
47 socket_client_connection::socket_client_connection(int _port, const std::string& _server,
48 long long _connect_timeout_usec, int _max_retries,
49 std::ostream *_logstream, log_level_values _log_level)
50 : client_connection(), socket_handler(0,tcp_s)
52 max_retries=_max_retries;
53 connect_timeout_usec=_connect_timeout_usec;
58 set_logging(_logstream,_log_level);
60 tcp_connect(max_retries);
62 do_callbacks(new_connection);
65 socket_client_connection::socket_client_connection(const std::string& _path,
66 long long _connect_timeout_usec, int _max_retries,
67 std::ostream *_logstream, log_level_values _log_level)
68 : client_connection(), socket_handler(0,unix_s)
70 max_retries=_max_retries;
71 connect_timeout_usec=_connect_timeout_usec;
75 set_logging(_logstream,_log_level);
77 unix_connect(max_retries);
79 do_callbacks(new_connection);
82 void socket_client_connection::tcp_connect(int max_retries)
84 struct sockaddr_in sock_addr;
86 sock_addr.sin_family = AF_INET;
87 sock_addr.sin_port = htons(port);
90 if (inet_aton(server.c_str(),&sock_addr.sin_addr)==0)
92 struct hostent *server_hent;
93 server_hent=gethostbyname(server.c_str());
94 if (server_hent == NULL)
95 throw t2n_connect_error(string("can't find server ")+server);
97 memcpy(&sock_addr.sin_addr,server_hent->h_addr_list[0],sizeof(sock_addr.sin_addr));
100 sock = socket(PF_INET, SOCK_STREAM, 0);
102 throw t2n_connect_error(string("socket() error: ")+strerror(errno));
106 connect_with_timeout((struct sockaddr *) &sock_addr,sizeof(sock_addr));
108 catch (t2n_connect_error &e)
110 // recurse if retries left
113 LOGSTREAM(debug,"retrying connect after connect error");
114 tcp_connect(max_retries-1);
117 LOGSTREAM(debug,"no more retries left after connect error");
121 void socket_client_connection::unix_connect(int max_retries)
123 struct sockaddr_un unix_addr;
125 unix_addr.sun_family = AF_UNIX;
126 strcpy (unix_addr.sun_path, path.c_str());
128 sock = socket(PF_UNIX, SOCK_STREAM, 0);
130 throw t2n_connect_error(string("socket() error: ")+strerror(errno));
134 connect_with_timeout((struct sockaddr *) &unix_addr, sizeof(unix_addr));
136 catch (t2n_connect_error &e)
138 // recurse if retries left
141 LOGSTREAM(debug,"retrying connect after connect error");
142 unix_connect(max_retries-1);
145 LOGSTREAM(debug,"no more retries left after connect error");
149 void socket_client_connection::connect_with_timeout(struct sockaddr *sock_addr,unsigned int sockaddr_size)
151 set_socket_options(sock);
153 LOGSTREAM(debug,"connect_with_timeout()");
154 int ret=::connect(sock,sock_addr, sockaddr_size);
158 if (errno==EINPROGRESS)
160 LOGSTREAM(debug,"connect_with_timeout(): EINPROGRESS");
164 struct timeval *timeout_ptr;
166 if (connect_timeout_usec == -1)
172 // convert timeout from long long usec to int sec + int usec
173 tval.tv_sec = connect_timeout_usec / 1000000;
174 tval.tv_usec = connect_timeout_usec % 1000000;
177 fd_set connect_socket_set;
178 FD_ZERO(&connect_socket_set);
179 FD_SET(sock,&connect_socket_set);
182 while ((ret=select(FD_SETSIZE, NULL, &connect_socket_set, NULL, timeout_ptr)) &&
183 ret < 0 && errno==EINTR);
187 LOGSTREAM(debug,"connect_with_timeout(): select error: " << strerror(errno));
188 throw t2n_connect_error(string("connect() error (select): ")+strerror(errno));
191 socklen_t sopt=sizeof(int);
193 ret=getsockopt(sock, SOL_SOCKET, SO_ERROR, (void*)(&valopt), &sopt);
194 if (ret < 0 || valopt)
196 LOGSTREAM(debug,"connect_with_timeout(): getsockopt error: " << strerror(errno));
197 throw t2n_connect_error(string("connect() error (getsockopt): ")+strerror(errno));
202 LOGSTREAM(debug,"connect_with_timeout(): error: " << strerror(errno));
203 throw t2n_connect_error(string("connect() error: ")+strerror(errno));
207 LOGSTREAM(debug,"connect_with_timeout(): success");
210 void socket_client_connection::close()
212 if (!client_connection::is_closed())
214 socket_handler::close();
215 client_connection::close();
219 /** @brief try to reconnect the current connection with the same connection credentials (host and port or path)
221 void socket_client_connection::reconnect()
223 LOGSTREAM(debug,"reconnect()");
225 // close the current connection if still open
228 socket_type_value type=get_type();
231 tcp_connect(max_retries);
232 else if (type == unix_s)
233 unix_connect(max_retries);
235 LOGSTREAM(debug,"reconnect(): basic connection established");
239 LOGSTREAM(debug,"reconnect() done, client_connection::is_closed() now " << client_connection::is_closed());