mirror of
https://github.com/OpenVPN/openvpn3.git
synced 2024-09-20 20:13:05 +02:00
400b7324da
TAP-based tunnels not supported.
139 lines
4.1 KiB
C++
139 lines
4.1 KiB
C++
//
|
|
// exception.hpp
|
|
// OpenVPN
|
|
//
|
|
// Copyright (c) 2012 OpenVPN Technologies, Inc. All rights reserved.
|
|
//
|
|
|
|
// Basic exception handling. Allow exception classes for specific errors
|
|
// to be easily defined, and allow exceptions to be thrown with a consise
|
|
// syntax that allows stringstream concatenation using <<
|
|
|
|
#ifndef OPENVPN_COMMON_EXCEPTION_H
|
|
#define OPENVPN_COMMON_EXCEPTION_H
|
|
|
|
#include <string>
|
|
#include <sstream>
|
|
#include <exception>
|
|
|
|
#include <boost/algorithm/string.hpp> // for boost::algorithm::starts_with
|
|
#include <boost/system/error_code.hpp>
|
|
|
|
#ifdef OPENVPN_DEBUG_EXCEPTION
|
|
// well-known preprocessor hack to get __FILE__:__LINE__ rendered as a string
|
|
# define OPENVPN_STRINGIZE(x) OPENVPN_STRINGIZE2(x)
|
|
# define OPENVPN_STRINGIZE2(x) #x
|
|
# define OPENVPN_FILE_LINE "/" __FILE__ ":" OPENVPN_STRINGIZE(__LINE__)
|
|
#else
|
|
# define OPENVPN_FILE_LINE
|
|
#endif
|
|
|
|
namespace openvpn {
|
|
// returns a string describing a boost::system error code
|
|
template <typename ErrorCode>
|
|
inline std::string errinfo(ErrorCode err)
|
|
{
|
|
boost::system::error_code e(err, boost::system::system_category());
|
|
return e.message();
|
|
}
|
|
|
|
// string exception class, where the exception is described by a std::string
|
|
class Exception : public std::exception
|
|
{
|
|
public:
|
|
Exception(const std::string& err) : err_(err) {}
|
|
virtual const char* what() const throw() { return err_.c_str(); }
|
|
const std::string& err() const { return err_; }
|
|
virtual ~Exception() throw() {}
|
|
|
|
void add_label(const std::string& label)
|
|
{
|
|
err_ = label + ": " + err_;
|
|
}
|
|
|
|
void remove_label(const std::string& label)
|
|
{
|
|
const std::string head = label + ": ";
|
|
if (boost::algorithm::starts_with(err_, head))
|
|
err_ = err_.substr(head.length());
|
|
}
|
|
|
|
private:
|
|
std::string err_;
|
|
};
|
|
|
|
// define a simple custom exception class with no extra info
|
|
# define OPENVPN_SIMPLE_EXCEPTION(C) \
|
|
class C : public std::exception { \
|
|
public: \
|
|
virtual const char* what() const throw() { return #C OPENVPN_FILE_LINE; } \
|
|
}
|
|
|
|
// define a simple custom exception class with no extra info that inherits from a custom base
|
|
# define OPENVPN_SIMPLE_EXCEPTION_INHERIT(B, C) \
|
|
class C : public B { \
|
|
public: \
|
|
virtual const char* what() const throw() { return #C OPENVPN_FILE_LINE; } \
|
|
}
|
|
|
|
// define a custom exception class that allows extra info
|
|
# define OPENVPN_EXCEPTION(C) \
|
|
class C : public openvpn::Exception { \
|
|
public: \
|
|
C() : openvpn::Exception(#C OPENVPN_FILE_LINE) {} \
|
|
C(std::string err) : openvpn::Exception(#C OPENVPN_FILE_LINE ": " + err) {} \
|
|
}
|
|
|
|
// define a custom exception class that allows extra info, but does not emit a tag
|
|
# define OPENVPN_UNTAGGED_EXCEPTION(C) \
|
|
class C : public openvpn::Exception { \
|
|
public: \
|
|
C(std::string err) : openvpn::Exception(err) {} \
|
|
}
|
|
|
|
// define a custom exception class that allows extra info, and inherits from a custom base
|
|
# define OPENVPN_EXCEPTION_INHERIT(B, C) \
|
|
class C : public B { \
|
|
public: \
|
|
C() : B(#C OPENVPN_FILE_LINE) {} \
|
|
C(std::string err) : B(#C OPENVPN_FILE_LINE ": " + err) {} \
|
|
}
|
|
|
|
// define a custom exception class that allows extra info, and inherits from a custom base,
|
|
// but does not emit a tag
|
|
# define OPENVPN_UNTAGGED_EXCEPTION_INHERIT(B, C) \
|
|
class C : public B { \
|
|
public: \
|
|
C(std::string err) : B(err) {} \
|
|
}
|
|
|
|
// throw an Exception with stringstream concatenation allowed
|
|
# define OPENVPN_THROW_EXCEPTION(stuff) \
|
|
do { \
|
|
std::ostringstream _ovpn_exc; \
|
|
_ovpn_exc << stuff; \
|
|
throw openvpn::Exception(_ovpn_exc.str()); \
|
|
} while (0)
|
|
|
|
// throw an OPENVPN_EXCEPTION class with stringstream concatenation allowed
|
|
# define OPENVPN_THROW(exc, stuff) \
|
|
do { \
|
|
std::ostringstream _ovpn_exc; \
|
|
_ovpn_exc << stuff; \
|
|
throw exc(_ovpn_exc.str()); \
|
|
} while (0)
|
|
|
|
// properly rethrow an exception that might be derived from Exception
|
|
inline void throw_ref(const std::exception& e)
|
|
{
|
|
const Exception* ex = dynamic_cast<const Exception*>(&e);
|
|
if (ex)
|
|
throw *ex;
|
|
else
|
|
throw e;
|
|
}
|
|
|
|
} // namespace openvpn
|
|
|
|
#endif // OPENVPN_COMMON_EXCEPTION_H
|