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367 | #include "gate/gatemain.h"
#include "gate/console.hpp"
#include "gate/applications.hpp"
#include "gate/files.hpp"
#include "gate/net/sockets.hpp"
#include "gate/net/nameresolvers.hpp"
#include "gate/utilities.hpp"
#include "gate/exceptions.hpp"
#if defined(GATE_COMPILER_MSVC) && defined(GATE_LEAK_DETECTION) && defined(GATE_SYS_WIN) && !defined(GATE_SYS_WINCE) && (GATE_ARCH != GATE_ARCH_ARM32) && (GATE_ARCH != GATE_ARCH_ARM64)
# include <vld.h>
#endif
namespace gate
{
namespace apps
{
using namespace gate::net;
static Socket::Endpoint parse_host(String const& host, int32_t port, bool ipv6)
{
Array<net::Socket::Endpoint> eps = net::NameResolver::resolveHost(
host, ipv6 ? net::Socket::Family_Inet6 : net::Socket::Family_Inet4);
if (eps.empty())
{
raiseException(results::NotAvailable, "Failed to resolve hostname");
}
Socket::Endpoint ep = eps[0];
if (ipv6)
{
ep.ip6.port = (uint16_t)port;
}
else
{
ep.ip4.port = (uint16_t)port;
}
return ep;
}
static void run_connect(String const& host, int32_t const& port, bool ipv6 = false)
{
Socket::Endpoint ep = parse_host(host, port, ipv6);
Socket s(ep.getFamily(), Socket::MsgType_Stream, Socket::Protocol_Tcp);
VoidResult result = s.tryConnect(ep);
if (result.hasError())
{
Console << "Failed to establish connection to: " << host << " on port " << port << strings::NewLine;
}
else
{
Console << "Connection established to: " << host << " on port " << port << strings::NewLine;
}
}
static size_t refill_socket_group(Socket* sockEntries, TimeCounter* timeoutEntries, uint8_t* flagsEntries, uint16_t* portEntries, size_t count,
TimeCounter const& nextTimeout, uint8_t nextFlags,
Socket::Endpoint& endpoint, ArrayList<uint16_t>& portsPool)
{
for (size_t n = 0; (n != count) && !portsPool.empty(); ++n)
{
Socket& sock = sockEntries[n];
if (!sock.valid())
{
TimeCounter& timeout = timeoutEntries[n];
uint16_t& port = portEntries[n];
uint16_t nextPort = portsPool[0];
if (endpoint.family == GATE_SOCKET_FAMILY_INET6)
{
endpoint.ip6.port = nextPort;
Socket newsock(Socket::SocketType_Tcp6);
newsock.setOption(Socket::Option_Blocking, 0);
newsock.connect(endpoint);
sock.swap(newsock);
}
else
{
endpoint.ip4.port = nextPort;
Socket newsock(Socket::SocketType_Tcp4);
newsock.setOption(Socket::Option_Blocking, 0);
newsock.connect(endpoint);
newsock.setOption(Socket::Option_Blocking, 1);
sock.swap(newsock);
}
timeout = nextTimeout;
port = nextPort;
portsPool.removeAt(0);
}
}
// move empty sockets to back
size_t ret = 0;
for (size_t n = 0; n != count; ++n)
{
Socket& sock = sockEntries[n];
TimeCounter& timeout = timeoutEntries[n];
uint16_t& port = portEntries[n];<--- The scope of the variable 'timeout' can be reduced. [+]The scope of the variable 'timeout' can be reduced. Warning: Be careful when fixing this message, especially when there are inner loops. Here is an example where cppcheck will write that the scope for 'i' can be reduced:
void f(int x)
{
int i = 0;
if (x) {
// it's safe to move 'int i = 0;' here
for (int n = 0; n < 10; ++n) {
// it is possible but not safe to move 'int i = 0;' here
do_something(&i);
}
}
}
When you see this message it is always safe to reduce the variable scope 1 level.
uint8_t& flags = flagsEntries[n];<--- The scope of the variable 'port' can be reduced. [+]The scope of the variable 'port' can be reduced. Warning: Be careful when fixing this message, especially when there are inner loops. Here is an example where cppcheck will write that the scope for 'i' can be reduced:
void f(int x)
{
int i = 0;
if (x) {
// it's safe to move 'int i = 0;' here
for (int n = 0; n < 10; ++n) {
// it is possible but not safe to move 'int i = 0;' here
do_something(&i);
}
}
}
When you see this message it is always safe to reduce the variable scope 1 level.
flags = nextFlags;
if (sock.valid())
{
if (n != ret)
{
sock.swap(sockEntries[ret]);
timeout.swap(timeoutEntries[ret]);
gate::swapRefsNoExcept(port, portEntries[ret]);
}
++ret;
}
}
return ret;
}
static void run_scan(String const& host, int32_t const& port, int32_t const& portscount,
int32_t const& timeout_ms, bool ipv6 = false)
{
Stream& strm = Console;
if (!port || !portscount)
{
raiseException(results::InvalidArg, "Missing port arguments", "scan");
}
ArrayList<uint16_t> portsPool;
for (int32_t n = 0; n < portscount; ++n)
{
int32_t p = port + n;
if ((p > 0) && (p < 65536))
{
portsPool.add(static_cast<uint16_t>(p));
}
}
Socket::Endpoint ep = parse_host(host, 0, ipv6);
Socket sockets[60];
uint16_t ports[60];
uint8_t flags[60];
TimeCounter timeouts[60];
TimeCounter startTime = TimeCounter::now();
for (size_t n = 0; n != sizeof(timeouts) / sizeof(timeouts[0]); ++n)
{
timeouts[n] = startTime;
}
while (!portsPool.empty())
{
TimeCounter nextTimeout = TimeCounter::now() + time::Milliseconds(timeout_ms);
uint8_t nextStatusFlags = static_cast<uint8_t>(Socket::SelectStatus_Send | Socket::SelectStatus_Error);
size_t socketCount = refill_socket_group(sockets, timeouts, flags, ports, 60,
nextTimeout, nextStatusFlags, ep, portsPool);
Socket::select(sockets, socketCount, flags, 250);
TimeCounter now = TimeCounter::now();
for (size_t n = 0; n != socketCount; ++n)
{
Socket& sock = sockets[n];
uint8_t& statusFlags = flags[n];
uint16_t& port = ports[n];
TimeCounter& timeout = timeouts[n];<--- The scope of the variable 'port' can be reduced. [+]The scope of the variable 'port' can be reduced. Warning: Be careful when fixing this message, especially when there are inner loops. Here is an example where cppcheck will write that the scope for 'i' can be reduced:
void f(int x)
{
int i = 0;
if (x) {
// it's safe to move 'int i = 0;' here
for (int n = 0; n < 10; ++n) {
// it is possible but not safe to move 'int i = 0;' here
do_something(&i);
}
}
}
When you see this message it is always safe to reduce the variable scope 1 level.
if (statusFlags & Socket::SelectStatus_Send)
{
// connection was established
sock.close();
strm << "Port " << port << " connected" << strings::NewLine;
}
else if (statusFlags & Socket::SelectStatus_Error)
{
// socket error detected, connection rejected
sock.close();
}
else
{
if (now > timeout)
{
// connection not established within timeout
sock.close();
}
}
}
}
}
static void run_terminal(String const& host, int32_t const& port, bool ipv6 = false)
{
Socket::Endpoint ep = parse_host(host, port, ipv6);
Socket client(ep.getFamily(), Socket::MsgType_Stream, Socket::Protocol_Tcp);
VoidResult result = client.tryConnect(ep);
if (result.hasError())<--- Shadowed declaration
{
Console << "Failed to establish connection to: " << host << " on port " << port << strings::NewLine;
return;
}
Console << "Connection established to: " << host << " on port " << port << strings::NewLine;
for (;;)
{
bool canRead = false;
bool canWrite = false;
bool hasError = false;
uint32_t readTimeout = 10;
VoidResult result;
result = client.trySelect(NULL, &canWrite, NULL, 0);<--- Shadow variable
if (result.hasError())
{
Console << strings::NewLine << "Client socket select error detected" << strings::NewLine;
break;
}
if (canWrite)
{
char_32_t chr;
if (Console.readChar(chr, 0))
{
char bytes[16];
size_t len = Char::writeUtf8(chr, bytes, sizeof(bytes));
size_t sent = 0;
if (chr == 13)
{
bytes[len] = 10;
++len;
}
Result<size_t> sendResult;
while (sent < len)
{
sendResult = client.trySend(&bytes[sent], len - sent);
if (sendResult.hasError())
{
break;
}
else
{
sent += sendResult.value();
}
}
if (sendResult.hasError())
{
Console << strings::NewLine << "Failed to send input to remote server" << strings::NewLine;
break;
}
readTimeout = 0;
}
}
result = client.trySelect(&canRead, NULL, &hasError, readTimeout);
if (result.hasError())
{
Console << strings::NewLine << "Client socket select error detected" << strings::NewLine;
break;
}
if (hasError)
{
Console << strings::NewLine << "Client socket error detected" << strings::NewLine;
break;
}
if (canRead)
{
char chr;
Result<size_t> readResult = client.tryReceive(&chr, 1);
if (readResult.hasError())
{
Console << strings::NewLine << "Failed to read from socket" << strings::NewLine;
break;
}
if (readResult.value() == 0)
{
Console << strings::NewLine << "Connection closed" << strings::NewLine;
break;
}
Console.tryWrite(&chr, 1);
}
}
}
class GATE_API_LOCAL TcpCliApp : public App
{
public:
virtual void run() override
{
static AppOptionDef help = AppOptionDef::createSwitch("help", "?", "show_help", "Shows help");
static AppOptionDef connect = AppOptionDef::createString("connect", "C", "", "server_host_or_ip", "Connects to a TCP server IP");
static AppOptionDef port = AppOptionDef::createInt32("port", "P", 22, "server_port", "Port number to start the connection attempt");
static AppOptionDef scan = AppOptionDef::createString("scan", "S", "", "server_host_or_ip", "Tries to connect to the given TCP server");
static AppOptionDef portscount = AppOptionDef::createInt32("ports-count", "N", 1, "port_count", "Number of ports to access");
static AppOptionDef timeout = AppOptionDef::createInt32("timeout", "T", 5000, "milliseconds", "Connection timeout in milliseconds");
static AppOptionDef iaterm = AppOptionDef::createString("interactive", "I", "", "server_host_or_ip", "Connects to a TCP server IP with terminal");
static AppOptionDef* options[] =
{
&help,
&connect,
&port,
&scan,
&portscount,
&iaterm,
&timeout
};
size_t const optionsCount = sizeof(options) / sizeof(options[0]);
App::parseAppOptions(this->getArgs(), options, optionsCount);
if (help.getBool())
{
App::printAppOptions(options, optionsCount, Console);
return;
}
try
{
String optConnect = connect.getString();
if (optConnect)
{
run_connect(optConnect, port.getInt32(), false);
return;
}
String optScan = scan.getString();
if (optScan)
{
run_scan(optScan, port.getInt32(), portscount.getInt32(), timeout.getInt32(), false);
return;
}
String optInteractive = iaterm.getString();
if (optInteractive)
{
run_terminal(optInteractive, port.getInt32());
return;
}
}
catch (Throwable const& xcpt)
{
ConError << util::printException(xcpt);
throw;
}
catch (...)
{
Console.writeErr("Unknown exception");
GATEXX_RAISE_EXCEPTION(results::UnknownException, NULL, 0);
}
ConError
<< "Missing arguments." << strings::NewLine
<< "Use '--help' to see all available options." << strings::NewLine;
GATEXX_RAISE_ERROR(results::InvalidArg);
}
};
} // end of namespace apps
} // end of namespace gate
int gate_main(char const* program, char const* const* arguments, gate_size_t argcount, gate_uintptr_t apphandle)
{
gate::apps::TcpCliApp app;
return gate::App::runApp(app, program, arguments, argcount, apphandle);
}
|