/usr/share/doc/libglibmm-2.4-dev/examples/network/socket-server.cc is in libglibmm-2.4-doc 2.56.0-1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 | #include <chrono>
#include <condition_variable>
#include <giomm.h>
#include <glibmm.h>
#include <iostream>
#include <memory>
#include <mutex>
#include <thread>
namespace
{
Glib::RefPtr<Glib::MainLoop> loop;
int port = 7777;
bool verbose = false;
bool dont_reuse_address = false;
bool non_blocking = false;
bool use_udp = false;
bool use_source = false;
bool use_ipv6 = false;
int cancel_timeout = 0;
bool stop_thread = false;
std::mutex mutex_thread;
std::condition_variable cond_thread;
class ServerOptionGroup : public Glib::OptionGroup
{
public:
ServerOptionGroup() : Glib::OptionGroup("server_group", "", "")
{
Glib::OptionEntry entry;
entry.set_long_name("port");
entry.set_short_name('p');
entry.set_description("Local port to bind to, default: 7777");
add_entry(entry, port);
entry.set_long_name("cancel");
entry.set_short_name('c');
entry.set_description("Cancel any op after the specified amount of seconds");
add_entry(entry, cancel_timeout);
entry.set_long_name("udp");
entry.set_short_name('u');
entry.set_description("Use UDP instead of TCP");
add_entry(entry, use_udp);
entry.set_long_name("verbose");
entry.set_short_name('v');
entry.set_description("Be verbose");
add_entry(entry, verbose);
entry.set_long_name("no-reuse");
entry.set_short_name('\0');
entry.set_description("Don't SOADDRREUSE");
add_entry(entry, dont_reuse_address);
entry.set_long_name("non-blocking");
entry.set_short_name('n');
entry.set_description("Enable non-blocking I/O");
add_entry(entry, non_blocking);
entry.set_long_name("use-source");
entry.set_short_name('s');
entry.set_description("Use Gio::SocketSource to wait for non-blocking I/O");
add_entry(entry, use_source);
entry.set_long_name("use-ipv6");
entry.set_short_name('6');
entry.set_description("Use IPv6 address family");
add_entry(entry, use_ipv6);
}
};
Glib::ustring
socket_address_to_string(const Glib::RefPtr<Gio::SocketAddress>& address)
{
auto isockaddr = Glib::RefPtr<Gio::InetSocketAddress>::cast_dynamic(address);
if (!isockaddr)
return Glib::ustring();
auto inet_address = isockaddr->get_address();
auto str = inet_address->to_string();
auto the_port = isockaddr->get_port();
auto res = Glib::ustring::compose("%1:%2", str, the_port);
return res;
}
static bool source_ready(Glib::IOCondition /*condition*/)
{
loop->quit();
return false;
}
static void
ensure_condition(const Glib::RefPtr<Gio::Socket>& socket, const Glib::ustring& where,
const Glib::RefPtr<Gio::Cancellable>& cancellable, Glib::IOCondition condition)
{
if (!non_blocking)
return;
if (use_source)
{
Gio::signal_socket().connect(sigc::ptr_fun(&source_ready), socket, condition);
loop->run();
}
else
{
try
{
socket->condition_wait(condition, cancellable);
}
catch (const Gio::Error& error)
{
std::cerr << Glib::ustring::compose("condition wait error for %1: %2\n", where, error.what());
exit(1);
}
}
}
static void
cancel_thread(Glib::RefPtr<Gio::Cancellable> cancellable)
{
std::unique_lock<std::mutex> lock(mutex_thread);
if (!cond_thread.wait_for(
lock, std::chrono::seconds(cancel_timeout), []() { return stop_thread; }))
{
// !stop_thread, i.e. timeout
std::cout << "Cancelling\n";
cancellable->cancel();
}
}
class JoinAndDelete
{
public:
void operator()(std::thread* thread)
{
stop_thread = true;
cond_thread.notify_all();
thread->join();
delete thread;
}
};
} // end anonymous namespace
int
main(int argc, char* argv[])
{
Glib::RefPtr<Gio::Socket> socket, new_socket, recv_socket;
Glib::RefPtr<Gio::SocketAddress> address;
Glib::RefPtr<Gio::Cancellable> cancellable;
Gio::init();
Glib::OptionContext option_context(" - Test Gio::Socket server stuff");
ServerOptionGroup option_group;
option_context.set_main_group(option_group);
try
{
option_context.parse(argc, argv);
}
catch (const Glib::Error& error)
{
std::cerr << Glib::ustring::compose("%1: %2\n", argv[0], error.what());
return 1;
}
std::unique_ptr<std::thread, JoinAndDelete> thread;
if (cancel_timeout)
{
cancellable = Gio::Cancellable::create();
thread.reset(new std::thread(&cancel_thread, cancellable));
}
loop = Glib::MainLoop::create();
auto socket_type = use_udp ? Gio::SOCKET_TYPE_DATAGRAM : Gio::SOCKET_TYPE_STREAM;
auto socket_family = use_ipv6 ? Gio::SOCKET_FAMILY_IPV6 : Gio::SOCKET_FAMILY_IPV4;
try
{
socket = Gio::Socket::create(socket_family, socket_type, Gio::SOCKET_PROTOCOL_DEFAULT);
}
catch (const Gio::Error& error)
{
std::cerr << Glib::ustring::compose("%1: %2\n", argv[0], error.what());
return 1;
}
if (non_blocking)
socket->set_blocking(false);
auto src_address =
Gio::InetSocketAddress::create(Gio::InetAddress::create_any(socket_family), port);
try
{
socket->bind(src_address, !dont_reuse_address);
}
catch (const Gio::Error& error)
{
std::cerr << Glib::ustring::compose("Can't bind socket: %1\n", error.what());
return 1;
}
if (!use_udp)
{
try
{
socket->listen();
}
catch (const Gio::Error& error)
{
std::cerr << Glib::ustring::compose("Can't listen on socket: %1\n", error.what());
return 1;
}
std::cout << Glib::ustring::compose("listening on port %1...\n", port);
ensure_condition(socket, "accept", cancellable, Glib::IO_IN);
try
{
new_socket = socket->accept(cancellable);
}
catch (const Gio::Error& error)
{
std::cerr << Glib::ustring::compose("Error accepting socket: %1\n", error.what());
return 1;
}
if (non_blocking)
new_socket->set_blocking(false);
try
{
address = new_socket->get_remote_address();
}
catch (const Gio::Error& error)
{
std::cerr << Glib::ustring::compose("Error getting remote address: %1\n", error.what());
return 1;
}
std::cout << Glib::ustring::compose(
"got a new connection from %1\n", socket_address_to_string(address));
recv_socket = new_socket;
}
else
{
recv_socket = socket;
}
while (true)
{
gchar buffer[4096] = {};
gssize size;
ensure_condition(recv_socket, "receive", cancellable, Glib::IO_IN);
try
{
if (use_udp)
size = recv_socket->receive_from(address, buffer, sizeof buffer, cancellable);
else
size = recv_socket->receive(buffer, sizeof buffer, cancellable);
}
catch (const Gio::Error& error)
{
std::cerr << Glib::ustring::compose("Error receiving from socket: %1\n", error.what());
return 1;
}
if (size == 0)
break;
std::cout << Glib::ustring::compose("received %1 bytes of data", size);
if (use_udp)
std::cout << Glib::ustring::compose(" from %1", socket_address_to_string(address));
std::cout << std::endl;
if (verbose)
g_print("-------------------------\n"
"%.*s\n"
"-------------------------\n",
(int)size, buffer);
auto to_send = size;
while (to_send > 0)
{
ensure_condition(recv_socket, "send", cancellable, Glib::IO_OUT);
try
{
if (use_udp)
size = recv_socket->send_to(address, buffer, to_send, cancellable);
else
size = recv_socket->send(buffer, to_send, cancellable);
}
catch (const Gio::Error& error)
{
if (error.code() == Gio::Error::WOULD_BLOCK)
{
std::cout << "socket send would block, handling\n";
continue;
}
else
{
std::cerr << Glib::ustring::compose("Error sending to socket: %1\n", error.what());
return 1;
}
}
std::cout << Glib::ustring::compose("sent %1 bytes of data\n", size);
if (size == 0)
{
std::cerr << "Unexpected short write\n";
return 1;
}
to_send -= size;
}
}
std::cout << "connection closed\n";
if (new_socket)
{
try
{
new_socket->close();
}
catch (const Gio::Error& error)
{
std::cerr << Glib::ustring::compose("Error closing connection socket: %1\n", error.what());
return 1;
}
}
try
{
socket->close();
}
catch (const Gio::Error& error)
{
std::cerr << Glib::ustring::compose("Error closing master socket: %1\n", error.what());
return 1;
}
return 0;
}
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