網路的錯誤編碼對應的意義。SecureTransport.h   在  /System/Library/Frameworks/Security.framework   : enum {   errSSLProtocol                  = -9800,  /* SSL protocol error */   errSSLNegotiation               = -9801,  /* Cipher Suite negotiation failure */   errSSLFatalAlert                = -9802,  /* Fatal alert */   errSSLWouldBlock                = -9803,  /* I/O would block (not fatal) */   errSSLSessionNotFound           = -9804,  /* attempt to restore an unknown session */   errSSLClosedGraceful            = -9805,  /* connection closed gracefully */   errSSLClosedAbort               = -9806,  /* connection closed via error */   errSSLXCertChainInvalid         = -9807,  /* Invalid certificate chain */   errSSLBadCert                   = -9808,  /* bad certificate format */   errSSLCrypto                    = -9809,  /* underlying cryptographic error */   errSSLInternal                  = -9810,  /* Internal error */   errSSLModuleAttach              = -9811,  /* module attach failure */   errSSLUnknownRootCert           = -9812,  /* valid cert chain, untrusted root */   errSSLNoRootCert                = -9813,  /* cert chain not verified by root */   errSSLCertExpired               = -9814,  /* chain had an expired cert */   errSSLCertNotYetValid           = -9815,  /* chain had a cert not yet valid */   errSSLClosedNoNotify            = -9816,  /* server closed session with no notification */   errSSLBufferOverflow            = -9817,  /* insufficient buffer provided */   errSSLBadCipherSuite            = -9818,  /* bad SSLCipherSuite */   /* fatal errors detected by peer */   errSSLPeerUnexpectedMsg         = -9819,  /* unexpected message received */   errSSLPeerBadRecordMac          = -9820,  /* bad MAC */   errSSLPeerDecryptionFail        = -9821,  /* decryption failed */   errSSLPeerRecordOverflow        = -9822,  /* record overflow */   errSSLPeerDecompressFail        = -9823,  /* decompression failure */   errSSLPeerHandshakeFail         = -9824,  /* handshake failure */   errSSLPeerBadCert               = -9825,  /* misc. bad certificate */   errSSLPeerUnsupportedCert       = -9826,  /* bad unsupported cert format */   errSSLPeerCertRevoked           = -9827,  /* certificate revoked */   errSSLPeerCertExpired           = -9828,  /* certificate expired */   errSSLPeerCertUnknown           = -9829,  /* unknown certificate */   errSSLIllegalParam              = -9830,  /* illegal parameter */   errSSLPeerUnknownCA             = -9831,  /* unknown Cert Authority */   errSSLPeerAccessDenied          = -9832,  /* access denied */   errSSLPeerDecodeError           = -9833,  /* decoding error */   errSSLPeerDecryptError          = -9834,  /* decryption error */   errSSLPeerExportRestriction     = -9835,  /* export restriction */   errSSLPeerProtocolVersion       = -9836,  /* bad protocol version */   errSSLPeerInsufficientSecurity  = -9837,  /* insufficient security */   errSSLPeerInternalError         = -9838,  /* internal error */   errSSLPeerUserCancelled         = -9839,  /* user canceled */   errSSLPeerNoRenegotiation       = -9840,  /* no renegotiation allowed */   /* more errors detected by us */   errSSLHostNameMismatch          = -9843,  /* peer host name mismatch */   errSSLConnectionRefused         = -9844,  /* peer dropped connection before responding */   errSSLDecryptionFail            = -9845,  /* decryption failure */   errSSLBadRecordMac              = -9846,  /* bad MAC */   errSSLRecordOverflow            = -9847,  /* Record Overflow */   errSSLBadConfiguration          = -9848,  /* configuration error */   errSSLLast                      = -9849   /* end of range, to be deleted */ };