1 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 Module: FGfdmSocket.cpp
6 Purpose: Encapsulates a socket
7 Called by: FGOutput, et. al.
9 ------------- Copyright (C) 1999 Jon S. Berndt (jsb@hal-pc.org) -------------
11 This program is free software; you can redistribute it and/or modify it under
12 the terms of the GNU Lesser General Public License as published by the Free Software
13 Foundation; either version 2 of the License, or (at your option) any later
16 This program is distributed in the hope that it will be useful, but WITHOUT
17 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
18 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
21 You should have received a copy of the GNU Lesser General Public License along with
22 this program; if not, write to the Free Software Foundation, Inc., 59 Temple
23 Place - Suite 330, Boston, MA 02111-1307, USA.
25 Further information about the GNU Lesser General Public License can also be found on
26 the world wide web at http://www.gnu.org.
28 FUNCTIONAL DESCRIPTION
29 --------------------------------------------------------------------------------
30 This class excapsulates a socket for simple data writing
33 --------------------------------------------------------------------------------
36 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
38 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
43 #include "FGfdmSocket.h"
47 static const char *IdSrc = "$Id$";
48 static const char *IdHdr = ID_FDMSOCKET;
54 /*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
56 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
58 FGfdmSocket::FGfdmSocket(string address, int port)
60 sckt = sckt_in = size = 0;
63 #if defined(__BORLANDC__) || defined(_MSC_VER) || defined(__MINGW32__)
66 wsaReturnCode = WSAStartup(MAKEWORD(1,1), &wsaData);
67 if (wsaReturnCode == 0) cout << "Winsock DLL loaded ..." << endl;
68 else cout << "Winsock DLL not initialized ..." << endl;
71 if (address.find_first_not_of("0123456789.",0) != address.npos) {
72 if ((host = gethostbyname(address.c_str())) == NULL) {
73 cout << "Could not get host net address by name..." << endl;
76 if ((host = gethostbyaddr(address.c_str(), address.size(), PF_INET)) == NULL) {
77 cout << "Could not get host net address by number..." << endl;
82 cout << "Got host net address..." << endl;
83 sckt = socket(AF_INET, SOCK_STREAM, 0);
85 if (sckt >= 0) { // successful
86 memset(&scktName, 0, sizeof(struct sockaddr_in));
87 scktName.sin_family = AF_INET;
88 scktName.sin_port = htons(port);
89 std::memcpy(&scktName.sin_addr, host->h_addr_list[0], host->h_length);
90 int len = sizeof(struct sockaddr_in);
91 if (connect(sckt, (struct sockaddr*)&scktName, len) == 0) { // successful
92 cout << "Successfully connected to socket for output ..." << endl;
94 } else { // unsuccessful
95 cout << "Could not connect to socket for output ..." << endl;
97 } else { // unsuccessful
98 cout << "Could not create socket for FDM output, error = " << errno << endl;
104 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
106 FGfdmSocket::FGfdmSocket(int port)
110 unsigned long NoBlock = true;
112 #if defined(__BORLANDC__) || defined(_MSC_VER) || defined(__MINGW32__)
115 wsaReturnCode = WSAStartup(MAKEWORD(1,1), &wsaData);
116 if (wsaReturnCode == 0) cout << "Winsock DLL loaded ..." << endl;
117 else cerr << "Winsock DLL not initialized ..." << endl;
120 sckt = socket(AF_INET, SOCK_STREAM, 0);
122 if (sckt >= 0) { // successful
123 std::memset(&scktName, 0, sizeof(struct sockaddr_in));
124 scktName.sin_family = AF_INET;
125 scktName.sin_port = htons(port);
126 int len = sizeof(struct sockaddr_in);
127 if (bind(sckt, (struct sockaddr*)&scktName, len) == 0) { // successful
128 cout << "Successfully bound to socket for input on port " << port << endl;
129 if (listen(sckt, 5) >= 0) { // successful listen()
130 #if defined(__BORLANDC__) || defined(_MSC_VER) || defined(__MINGW32__)
131 ioctlsocket(sckt, FIONBIO, &NoBlock);
132 sckt_in = accept(sckt, (struct sockaddr*)&scktName, &len);
134 ioctl(sckt, FIONBIO, &NoBlock);
135 sckt_in = accept(sckt, (struct sockaddr*)&scktName, (socklen_t*)&len);
138 cerr << "Could not listen ..." << endl;
141 } else { // unsuccessful
142 cerr << "Could not bind to socket for input ..." << endl;
144 } else { // unsuccessful
145 cerr << "Could not create socket for FDM input, error = " << errno << endl;
151 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
153 FGfdmSocket::~FGfdmSocket()
156 if (sckt) shutdown(sckt,2);
157 if (sckt_in) shutdown(sckt_in,2);
166 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
168 string FGfdmSocket::Receive(void)
171 int len = sizeof(struct sockaddr_in);
174 unsigned long NoBlock = true;
175 string data = ""; // todo: should allocate this with a standard size as a
176 // class attribute and pass as a reference?
179 #if defined(__BORLANDC__) || defined(_MSC_VER) || defined(__MINGW32__)
180 sckt_in = accept(sckt, (struct sockaddr*)&scktName, &len);
182 sckt_in = accept(sckt, (struct sockaddr*)&scktName, (socklen_t*)&len);
185 #if defined(__BORLANDC__) || defined(_MSC_VER) || defined(__MINGW32__)
186 ioctlsocket(sckt_in, FIONBIO,&NoBlock);
188 ioctl(sckt_in, FIONBIO, &NoBlock);
190 send(sckt_in, "Connected to JSBSim server\nJSBSim> ", 35, 0);
195 while ((num_chars = recv(sckt_in, buf, 1024, 0)) > 0) {
196 data += string(buf).substr(0,num_chars);
197 total_chars += num_chars;
200 #if defined(_MSC_VER)
201 // when nothing received and the error isn't "would block"
202 // then assume that the client has closed the socket.
203 if (num_chars == 0) {
204 DWORD err = WSAGetLastError ();
205 if (err != WSAEWOULDBLOCK) {
206 printf ("Socket Closed. back to listening\n");
207 closesocket (sckt_in);
214 return data.substr(0, total_chars);
217 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
219 int FGfdmSocket::Reply(string text)
221 int num_chars_sent=0;
224 num_chars_sent = send(sckt_in, text.c_str(), text.size(), 0);
225 send(sckt_in, "JSBSim> ", 8, 0);
227 cerr << "Socket reply must be to a valid socket" << endl;
230 return num_chars_sent;
233 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
235 void FGfdmSocket::Close(void)
240 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
242 void FGfdmSocket::Clear(void)
248 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
250 void FGfdmSocket::Clear(string s)
253 size = buffer.size();
256 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
258 void FGfdmSocket::Append(const char* item)
260 if (size == 0) buffer += string(item);
261 else buffer += string(",") + string(item);
265 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
267 void FGfdmSocket::Append(double item)
271 sprintf(s,"%12.7f",item);
273 if (size == 0) buffer += string(s);
274 else buffer += string(",") + string(s);
278 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
280 void FGfdmSocket::Append(long item)
284 sprintf(s,"%12ld",item);
286 if (size == 0) buffer += string(s);
287 else buffer += string(",") + string(s);
291 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
293 void FGfdmSocket::Send(void)
295 buffer += string("\n");
296 if ((send(sckt,buffer.c_str(),buffer.size(),0)) <= 0) {
302 //%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
303 // The bitmasked value choices are as follows:
304 // unset: In this case (the default) JSBSim would only print
305 // out the normally expected messages, essentially echoing
306 // the config files as they are read. If the environment
307 // variable is not set, debug_lvl is set to 1 internally
308 // 0: This requests JSBSim not to output any messages
310 // 1: This value explicity requests the normal JSBSim
312 // 2: This value asks for a message to be printed out when
313 // a class is instantiated
314 // 4: When this value is set, a message is displayed when a
315 // FGModel object executes its Run() method
316 // 8: When this value is set, various runtime state variables
317 // are printed out periodically
318 // 16: When set various parameters are sanity checked and
319 // a message is printed out when they go out of bounds
321 void FGfdmSocket::Debug(int from)
323 if (debug_lvl <= 0) return;
325 if (debug_lvl & 1) { // Standard console startup message output
326 if (from == 0) { // Constructor
329 if (debug_lvl & 2 ) { // Instantiation/Destruction notification
330 if (from == 0) cout << "Instantiated: FGfdmSocket" << endl;
331 if (from == 1) cout << "Destroyed: FGfdmSocket" << endl;
333 if (debug_lvl & 4 ) { // Run() method entry print for FGModel-derived objects
335 if (debug_lvl & 8 ) { // Runtime state variables
337 if (debug_lvl & 16) { // Sanity checking
339 if (debug_lvl & 64) {
340 if (from == 0) { // Constructor
341 cout << IdSrc << endl;
342 cout << IdHdr << endl;