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error.hpp
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// OpenVPN -- An application to securely tunnel IP networks
// over a single port, with support for SSL/TLS-based
// session authentication and key exchange,
// packet encryption, packet authentication, and
// packet compression.
//
// Copyright (C) 2012- OpenVPN Inc.
//
// SPDX-License-Identifier: MPL-2.0 OR AGPL-3.0-only WITH openvpn3-openssl-exception
//
// Define OpenVPN error codes and a method to convert them to a string representation
#ifndef OPENVPN_ERROR_ERROR_H
#define OPENVPN_ERROR_ERROR_H
#include <openvpn/common/arraysize.hpp>
namespace openvpn::Error {
enum Type
{
SUCCESS = 0, // no error
NETWORK_RECV_ERROR, // errors receiving on network socket
NETWORK_EOF_ERROR, // EOF received on TCP network socket
NETWORK_SEND_ERROR, // errors sending on network socket
NETWORK_UNAVAILABLE, // network unavailable
DECRYPT_ERROR, // data channel encrypt/decrypt error
HMAC_ERROR, // HMAC verification failure
REPLAY_ERROR, // error from PacketIDReceive
BUFFER_ERROR, // exception thrown in Buffer methods
CC_ERROR, // general control channel errors
BAD_SRC_ADDR, // packet from unknown source address
COMPRESS_ERROR, // compress/decompress errors on data channel
RESOLVE_ERROR, // DNS resolution error
SOCKET_PROTECT_ERROR, // Error calling protect() method on socket
TUN_READ_ERROR, // read errors on tun/tap interface
TUN_WRITE_ERROR, // write errors on tun/tap interface
TUN_FRAMING_ERROR, // error with tun PF_INET/PF_INET6 prefix
TUN_SETUP_FAILED, // error setting up tun/tap interface
TUN_IFACE_CREATE, // error creating tun/tap interface
TUN_IFACE_DISABLED, // tun/tap interface is disabled
TUN_ERROR, // general tun error
TUN_REGISTER_RINGS_ERROR, // error registering ring buffers with wintun
TAP_NOT_SUPPORTED, // dev tap is present in profile but not supported
REROUTE_GW_NO_DNS, // redirect-gateway specified without alt DNS servers
TRANSPORT_ERROR, // general transport error
TCP_OVERFLOW, // TCP output queue overflow
TCP_SIZE_ERROR, // bad embedded uint16_t TCP packet size
TCP_CONNECT_ERROR, // client error on TCP connect
UDP_CONNECT_ERROR, // client error on UDP connect
SSL_ERROR, // errors resulting from read/write on SSL object
SSL_PARTIAL_WRITE, // SSL object did not process all written cleartext
SSL_CA_MD_TOO_WEAK, // CA message digest is too weak
SSL_CA_KEY_TOO_SMALL, // CA key is too small
SSL_DH_KEY_TOO_SMALL, // DH key is too small
ENCAPSULATION_ERROR, // exceptions thrown during packet encapsulation
EPKI_CERT_ERROR, // error obtaining certificate from External PKI provider
EPKI_SIGN_ERROR, // error obtaining RSA signature from External PKI provider
HANDSHAKE_TIMEOUT, // handshake failed to complete within given time frame
KEEPALIVE_TIMEOUT, // lost contact with peer
INACTIVE_TIMEOUT, // disconnected due to inactive timer
CONNECTION_TIMEOUT, // connection failed to establish within given time
PRIMARY_EXPIRE, // primary key context expired
TLS_VERSION_MIN, // peer cannot handshake at our minimum required TLS version
CERT_VERIFY_FAIL, // peer certificate verification failure
TLS_SIGALG_DISALLOWED_OR_UNSUPPORTED, // signature algorithm required by TLS peer is not supported
TLS_ALERT_PROTOCOL_VERSION, // TLS Alert: No common TLS version between server and client
TLS_ALERT_UNKNOWN_CA, // TLS Alert: Unknown CA (client certificate verify failed or peer-fingerprint failed)
TLS_ALERT_HANDSHAKE_FAILURE, // TLS Alert: Generic handshake failure from the other side
TLS_ALERT_CERTIFICATE_REQUIRED, // TLS Alert: certificate is required
TLS_ALERT_CERTIFICATE_EXPIRED, // TLS Alert: certificate has expired
TLS_ALERT_CERTIFICATE_REVOKED, // TLS Alert: certificate is revoked
TLS_ALERT_BAD_CERTIFICATE, // TLS Alert: bad/rejected certificate
TLS_ALERT_UNSUPPORTED_CERTIFICATE, // TLS Alert: unsupported certificate (X509 key usage)
TLS_ALERT_MISC, // Any TLS Alert that is in any of the previous TLS alerts
TLS_AUTH_FAIL, // tls-auth HMAC verification failed
TLS_CRYPT_META_FAIL, // tls-crypt-v2 metadata verification failed
PEM_PASSWORD_FAIL, // incorrect or missing PEM private key decryption password
AUTH_FAILED, // general authentication failure
CLIENT_HALT, // HALT message from server received
CLIENT_RESTART, // RESTART message from server received
TUN_HALT, // halt command from tun interface
RELAY, // RELAY message from server received
RELAY_ERROR, // RELAY error
N_PAUSE, // Number of transitions to Pause state
N_RECONNECT, // Number of reconnections
N_KEY_LIMIT_RENEG, // Number of renegotiations triggered by per-key limits such as data or packet limits
KEY_STATE_ERROR, // Received packet didn't match expected key state
PROXY_ERROR, // HTTP proxy error
PROXY_NEED_CREDS, // HTTP proxy needs credentials
EARLY_NEG_INVALID, // Early protoctol negotiation information invalid/parse error
NTLM_MISSING_CRYPTO, // crypto primitives requires for NTLM are unavailable
UNUSED_OPTIONS, // unused/unknown options found in configuration
SESSION_EXPIRED, // authentication error when using session-id and password is not cache
NEED_CREDS, // credentials are required but are missing (likely due to auth-nocache)
// key event errors
KEV_NEGOTIATE_ERROR,
KEV_PENDING_ERROR,
N_KEV_EXPIRE,
KEY_EXPANSION_ERROR,
// Packet ID error detail
PKTID_INVALID,
PKTID_BACKTRACK,
PKTID_EXPIRE,
PKTID_REPLAY,
PKTID_TIME_BACKTRACK,
N_ERRORS,
// undefined error
UNDEF = SUCCESS,
};
inline const char *name(const size_t type)
{
static const char *names[] = {
"SUCCESS",
"NETWORK_RECV_ERROR",
"NETWORK_EOF_ERROR",
"NETWORK_SEND_ERROR",
"NETWORK_UNAVAILABLE",
"DECRYPT_ERROR",
"HMAC_ERROR",
"REPLAY_ERROR",
"BUFFER_ERROR",
"CC_ERROR",
"BAD_SRC_ADDR",
"COMPRESS_ERROR",
"RESOLVE_ERROR",
"SOCKET_PROTECT_ERROR",
"TUN_READ_ERROR",
"TUN_WRITE_ERROR",
"TUN_FRAMING_ERROR",
"TUN_SETUP_FAILED",
"TUN_IFACE_CREATE",
"TUN_IFACE_DISABLED",
"TUN_ERROR",
"TUN_REGISTER_RINGS_ERROR",
"TAP_NOT_SUPPORTED",
"REROUTE_GW_NO_DNS",
"TRANSPORT_ERROR",
"TCP_OVERFLOW",
"TCP_SIZE_ERROR",
"TCP_CONNECT_ERROR",
"UDP_CONNECT_ERROR",
"SSL_ERROR",
"SSL_PARTIAL_WRITE",
"SSL_CA_MD_TOO_WEAK",
"SSL_CA_KEY_TOO_SMALL",
"SSL_DH_KEY_TOO_SMALL",
"ENCAPSULATION_ERROR",
"EPKI_CERT_ERROR",
"EPKI_SIGN_ERROR",
"HANDSHAKE_TIMEOUT",
"KEEPALIVE_TIMEOUT",
"INACTIVE_TIMEOUT",
"CONNECTION_TIMEOUT",
"PRIMARY_EXPIRE",
"TLS_VERSION_MIN",
"CERT_VERIFY_FAIL",
"TLS_SIGALG_DISALLOWED_OR_UNSUPPORTED",
"TLS_ALERT_PROTOCOL_VERSION",
"TLS_ALERT_UNKNOWN_CA",
"TLS_ALERT_HANDSHAKE_FAILURE",
"TLS_ALERT_CERTIFICATE_REQUIRED",
"TLS_ALERT_CERTIFICATE_EXPIRED",
"TLS_ALERT_CERTIFICATE_REVOKED",
"TLS_ALERT_BAD_CERTIFICATE",
"TLS_ALERT_UNSUPPORTED_CERTIFICATE",
"TLS_ALERT_MISC",
"TLS_AUTH_FAIL",
"TLS_CRYPT_META_FAIL",
"PEM_PASSWORD_FAIL",
"AUTH_FAILED",
"CLIENT_HALT",
"CLIENT_RESTART",
"TUN_HALT",
"RELAY",
"RELAY_ERROR",
"N_PAUSE",
"N_RECONNECT",
"N_KEY_LIMIT_RENEG",
"KEY_STATE_ERROR",
"PROXY_ERROR",
"PROXY_NEED_CREDS",
"EARLY_NEG_INVALID",
"NTLM_MISSING_CRYPTO",
"UNUSED_OPTIONS_ERROR",
"SESSION_EXPIRED",
"NEED_CREDS",
"KEV_NEGOTIATE_ERROR",
"KEV_PENDING_ERROR",
"N_KEV_EXPIRE",
"KEV_EXPANSION_ERROR",
"PKTID_INVALID",
"PKTID_BACKTRACK",
"PKTID_EXPIRE",
"PKTID_REPLAY",
"PKTID_TIME_BACKTRACK",
};
static_assert(N_ERRORS == array_size(names), "error names array inconsistency");
if (type < N_ERRORS)
return names[type];
else
return "UNKNOWN_ERROR_TYPE";
}
} // namespace openvpn::Error
#endif // OPENVPN_ERROR_ERROR_H