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233 lines
9.3 KiB
233 lines
9.3 KiB
/* packet.h: Rx packet layout and definitions |
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* |
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* Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved. |
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* Written by David Howells ([email protected]) |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* as published by the Free Software Foundation; either version |
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* 2 of the License, or (at your option) any later version. |
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*/ |
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#ifndef _LINUX_RXRPC_PACKET_H |
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#define _LINUX_RXRPC_PACKET_H |
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typedef u32 rxrpc_seq_t; /* Rx message sequence number */ |
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typedef u32 rxrpc_serial_t; /* Rx message serial number */ |
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typedef __be32 rxrpc_seq_net_t; /* on-the-wire Rx message sequence number */ |
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typedef __be32 rxrpc_serial_net_t; /* on-the-wire Rx message serial number */ |
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/*****************************************************************************/ |
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/* |
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* on-the-wire Rx packet header |
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* - all multibyte fields should be in network byte order |
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*/ |
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struct rxrpc_wire_header { |
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__be32 epoch; /* client boot timestamp */ |
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#define RXRPC_RANDOM_EPOCH 0x80000000 /* Random if set, date-based if not */ |
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__be32 cid; /* connection and channel ID */ |
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#define RXRPC_MAXCALLS 4 /* max active calls per conn */ |
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#define RXRPC_CHANNELMASK (RXRPC_MAXCALLS-1) /* mask for channel ID */ |
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#define RXRPC_CIDMASK (~RXRPC_CHANNELMASK) /* mask for connection ID */ |
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#define RXRPC_CIDSHIFT ilog2(RXRPC_MAXCALLS) /* shift for connection ID */ |
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#define RXRPC_CID_INC (1 << RXRPC_CIDSHIFT) /* connection ID increment */ |
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__be32 callNumber; /* call ID (0 for connection-level packets) */ |
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__be32 seq; /* sequence number of pkt in call stream */ |
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__be32 serial; /* serial number of pkt sent to network */ |
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uint8_t type; /* packet type */ |
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#define RXRPC_PACKET_TYPE_DATA 1 /* data */ |
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#define RXRPC_PACKET_TYPE_ACK 2 /* ACK */ |
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#define RXRPC_PACKET_TYPE_BUSY 3 /* call reject */ |
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#define RXRPC_PACKET_TYPE_ABORT 4 /* call/connection abort */ |
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#define RXRPC_PACKET_TYPE_ACKALL 5 /* ACK all outstanding packets on call */ |
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#define RXRPC_PACKET_TYPE_CHALLENGE 6 /* connection security challenge (SRVR->CLNT) */ |
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#define RXRPC_PACKET_TYPE_RESPONSE 7 /* connection secutity response (CLNT->SRVR) */ |
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#define RXRPC_PACKET_TYPE_DEBUG 8 /* debug info request */ |
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#define RXRPC_PACKET_TYPE_VERSION 13 /* version string request */ |
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#define RXRPC_N_PACKET_TYPES 14 /* number of packet types (incl type 0) */ |
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uint8_t flags; /* packet flags */ |
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#define RXRPC_CLIENT_INITIATED 0x01 /* signifies a packet generated by a client */ |
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#define RXRPC_REQUEST_ACK 0x02 /* request an unconditional ACK of this packet */ |
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#define RXRPC_LAST_PACKET 0x04 /* the last packet from this side for this call */ |
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#define RXRPC_MORE_PACKETS 0x08 /* more packets to come */ |
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#define RXRPC_JUMBO_PACKET 0x20 /* [DATA] this is a jumbo packet */ |
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#define RXRPC_SLOW_START_OK 0x20 /* [ACK] slow start supported */ |
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uint8_t userStatus; /* app-layer defined status */ |
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uint8_t securityIndex; /* security protocol ID */ |
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union { |
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__be16 _rsvd; /* reserved */ |
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__be16 cksum; /* kerberos security checksum */ |
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}; |
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__be16 serviceId; /* service ID */ |
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} __packed; |
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#define RXRPC_SUPPORTED_PACKET_TYPES ( \ |
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(1 << RXRPC_PACKET_TYPE_DATA) | \ |
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(1 << RXRPC_PACKET_TYPE_ACK) | \ |
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(1 << RXRPC_PACKET_TYPE_BUSY) | \ |
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(1 << RXRPC_PACKET_TYPE_ABORT) | \ |
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(1 << RXRPC_PACKET_TYPE_ACKALL) | \ |
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(1 << RXRPC_PACKET_TYPE_CHALLENGE) | \ |
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(1 << RXRPC_PACKET_TYPE_RESPONSE) | \ |
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/*(1 << RXRPC_PACKET_TYPE_DEBUG) | */ \ |
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(1 << RXRPC_PACKET_TYPE_VERSION)) |
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/*****************************************************************************/ |
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/* |
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* jumbo packet secondary header |
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* - can be mapped to read header by: |
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* - new_serial = serial + 1 |
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* - new_seq = seq + 1 |
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* - new_flags = j_flags |
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* - new__rsvd = j__rsvd |
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* - duplicating all other fields |
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*/ |
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struct rxrpc_jumbo_header { |
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uint8_t flags; /* packet flags (as per rxrpc_header) */ |
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uint8_t pad; |
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union { |
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__be16 _rsvd; /* reserved */ |
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__be16 cksum; /* kerberos security checksum */ |
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}; |
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}; |
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#define RXRPC_JUMBO_DATALEN 1412 /* non-terminal jumbo packet data length */ |
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#define RXRPC_JUMBO_SUBPKTLEN (RXRPC_JUMBO_DATALEN + sizeof(struct rxrpc_jumbo_header)) |
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/*****************************************************************************/ |
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/* |
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* on-the-wire Rx ACK packet data payload |
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* - all multibyte fields should be in network byte order |
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*/ |
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struct rxrpc_ackpacket { |
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__be16 bufferSpace; /* number of packet buffers available */ |
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__be16 maxSkew; /* diff between serno being ACK'd and highest serial no |
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* received */ |
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__be32 firstPacket; /* sequence no of first ACK'd packet in attached list */ |
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__be32 previousPacket; /* sequence no of previous packet received */ |
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__be32 serial; /* serial no of packet that prompted this ACK */ |
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uint8_t reason; /* reason for ACK */ |
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#define RXRPC_ACK_REQUESTED 1 /* ACK was requested on packet */ |
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#define RXRPC_ACK_DUPLICATE 2 /* duplicate packet received */ |
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#define RXRPC_ACK_OUT_OF_SEQUENCE 3 /* out of sequence packet received */ |
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#define RXRPC_ACK_EXCEEDS_WINDOW 4 /* packet received beyond end of ACK window */ |
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#define RXRPC_ACK_NOSPACE 5 /* packet discarded due to lack of buffer space */ |
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#define RXRPC_ACK_PING 6 /* keep alive ACK */ |
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#define RXRPC_ACK_PING_RESPONSE 7 /* response to RXRPC_ACK_PING */ |
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#define RXRPC_ACK_DELAY 8 /* nothing happened since received packet */ |
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#define RXRPC_ACK_IDLE 9 /* ACK due to fully received ACK window */ |
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#define RXRPC_ACK__INVALID 10 /* Representation of invalid ACK reason */ |
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uint8_t nAcks; /* number of ACKs */ |
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#define RXRPC_MAXACKS 255 |
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uint8_t acks[0]; /* list of ACK/NAKs */ |
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#define RXRPC_ACK_TYPE_NACK 0 |
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#define RXRPC_ACK_TYPE_ACK 1 |
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} __packed; |
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/* Some ACKs refer to specific packets and some are general and can be updated. */ |
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#define RXRPC_ACK_UPDATEABLE ((1 << RXRPC_ACK_REQUESTED) | \ |
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(1 << RXRPC_ACK_PING_RESPONSE) | \ |
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(1 << RXRPC_ACK_DELAY) | \ |
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(1 << RXRPC_ACK_IDLE)) |
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/* |
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* ACK packets can have a further piece of information tagged on the end |
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*/ |
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struct rxrpc_ackinfo { |
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__be32 rxMTU; /* maximum Rx MTU size (bytes) [AFS 3.3] */ |
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__be32 maxMTU; /* maximum interface MTU size (bytes) [AFS 3.3] */ |
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__be32 rwind; /* Rx window size (packets) [AFS 3.4] */ |
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__be32 jumbo_max; /* max packets to stick into a jumbo packet [AFS 3.5] */ |
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}; |
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/*****************************************************************************/ |
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/* |
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* Kerberos security type-2 challenge packet |
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*/ |
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struct rxkad_challenge { |
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__be32 version; /* version of this challenge type */ |
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__be32 nonce; /* encrypted random number */ |
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__be32 min_level; /* minimum security level */ |
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__be32 __padding; /* padding to 8-byte boundary */ |
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} __packed; |
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/*****************************************************************************/ |
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/* |
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* Kerberos security type-2 response packet |
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*/ |
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struct rxkad_response { |
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__be32 version; /* version of this response type */ |
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__be32 __pad; |
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/* encrypted bit of the response */ |
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struct { |
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__be32 epoch; /* current epoch */ |
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__be32 cid; /* parent connection ID */ |
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__be32 checksum; /* checksum */ |
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__be32 securityIndex; /* security type */ |
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__be32 call_id[4]; /* encrypted call IDs */ |
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__be32 inc_nonce; /* challenge nonce + 1 */ |
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__be32 level; /* desired level */ |
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} encrypted; |
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__be32 kvno; /* Kerberos key version number */ |
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__be32 ticket_len; /* Kerberos ticket length */ |
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} __packed; |
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/*****************************************************************************/ |
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/* |
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* RxRPC-level abort codes |
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*/ |
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#define RX_CALL_DEAD -1 /* call/conn has been inactive and is shut down */ |
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#define RX_INVALID_OPERATION -2 /* invalid operation requested / attempted */ |
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#define RX_CALL_TIMEOUT -3 /* call timeout exceeded */ |
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#define RX_EOF -4 /* unexpected end of data on read op */ |
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#define RX_PROTOCOL_ERROR -5 /* low-level protocol error */ |
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#define RX_USER_ABORT -6 /* generic user abort */ |
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#define RX_ADDRINUSE -7 /* UDP port in use */ |
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#define RX_DEBUGI_BADTYPE -8 /* bad debugging packet type */ |
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/* |
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* (un)marshalling abort codes (rxgen) |
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*/ |
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#define RXGEN_CC_MARSHAL -450 |
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#define RXGEN_CC_UNMARSHAL -451 |
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#define RXGEN_SS_MARSHAL -452 |
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#define RXGEN_SS_UNMARSHAL -453 |
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#define RXGEN_DECODE -454 |
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#define RXGEN_OPCODE -455 |
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#define RXGEN_SS_XDRFREE -456 |
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#define RXGEN_CC_XDRFREE -457 |
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/* |
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* Rx kerberos security abort codes |
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* - unfortunately we have no generalised security abort codes to say things |
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* like "unsupported security", so we have to use these instead and hope the |
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* other side understands |
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*/ |
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#define RXKADINCONSISTENCY 19270400 /* security module structure inconsistent */ |
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#define RXKADPACKETSHORT 19270401 /* packet too short for security challenge */ |
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#define RXKADLEVELFAIL 19270402 /* security level negotiation failed */ |
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#define RXKADTICKETLEN 19270403 /* ticket length too short or too long */ |
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#define RXKADOUTOFSEQUENCE 19270404 /* packet had bad sequence number */ |
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#define RXKADNOAUTH 19270405 /* caller not authorised */ |
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#define RXKADBADKEY 19270406 /* illegal key: bad parity or weak */ |
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#define RXKADBADTICKET 19270407 /* security object was passed a bad ticket */ |
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#define RXKADUNKNOWNKEY 19270408 /* ticket contained unknown key version number */ |
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#define RXKADEXPIRED 19270409 /* authentication expired */ |
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#define RXKADSEALEDINCON 19270410 /* sealed data inconsistent */ |
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#define RXKADDATALEN 19270411 /* user data too long */ |
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#define RXKADILLEGALLEVEL 19270412 /* caller not authorised to use encrypted conns */ |
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#endif /* _LINUX_RXRPC_PACKET_H */
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