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