245 lines
9.1 KiB
C
245 lines
9.1 KiB
C
/*
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* Copyright (c) 1988, 1992 The University of Utah and the Center
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* for Software Science (CSS).
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Center for Software Science of the University of Utah Computer
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* Science Department. CSS requests users of this software to return
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* to css-dist@cs.utah.edu any improvements that they make and grant
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* CSS redistribution rights.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)rmp_var.h 8.1 (Berkeley) 6/4/93
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*
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* from: Utah Hdr: rmp_var.h 3.1 92/07/06
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* Author: Jeff Forys, University of Utah CSS
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*/
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/*
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* Possible values for "rmp_type" fields.
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*/
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#define RMP_BOOT_REQ 1 /* boot request packet */
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#define RMP_BOOT_REPL 129 /* boot reply packet */
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#define RMP_READ_REQ 2 /* read request packet */
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#define RMP_READ_REPL 130 /* read reply packet */
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#define RMP_BOOT_DONE 3 /* boot complete packet */
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/*
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* Useful constants.
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*/
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#define RMP_VERSION 2 /* protocol version */
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#define RMP_TIMEOUT 600 /* timeout connection after ten minutes */
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#define RMP_PROBESID 0xffff /* session ID for probes */
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#define RMP_HOSTLEN 13 /* max length of server's name */
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#define RMP_MACHLEN 20 /* length of machine type field */
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/*
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* RMP error codes
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*/
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#define RMP_E_OKAY 0
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#define RMP_E_EOF 2 /* read reply: returned end of file */
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#define RMP_E_ABORT 3 /* abort operation */
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#define RMP_E_BUSY 4 /* boot reply: server busy */
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#define RMP_E_TIMEOUT 5 /* lengthen time out (not implemented) */
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#define RMP_E_NOFILE 16 /* boot reply: file does not exist */
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#define RMP_E_OPENFILE 17 /* boot reply: file open failed */
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#define RMP_E_NODFLT 18 /* boot reply: default file does not exist */
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#define RMP_E_OPENDFLT 19 /* boot reply: default file open failed */
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#define RMP_E_BADSID 25 /* read reply: bad session ID */
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#define RMP_E_BADPACKET 27 /* Bad packet detected */
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/*
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* RMPDATALEN is the maximum number of data octets that can be stuffed
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* into an RMP packet. This excludes the 802.2 LLC w/HP extensions.
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*/
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#define RMPDATALEN (RMP_MAX_PACKET - (sizeof(struct hp_hdr) + \
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sizeof(struct hp_llc)))
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/*
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* Define sizes of packets we send. Boot and Read replies are variable
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* in length depending on the length of `s'.
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*
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* Also, define how much space `restofpkt' can take up for outgoing
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* Boot and Read replies. Boot Request packets are effectively
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* limited to 255 bytes due to the preceding 1-byte length field.
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*/
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#define RMPBOOTSIZE(s) (sizeof(struct hp_hdr) + sizeof(struct hp_llc) + \
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sizeof(struct rmp_boot_repl) + s - sizeof(restofpkt))
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#define RMPREADSIZE(s) (sizeof(struct hp_hdr) + sizeof(struct hp_llc) + \
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sizeof(struct rmp_read_repl) + s - sizeof(restofpkt) \
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- sizeof(u_int8_t))
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#define RMPDONESIZE (sizeof(struct hp_hdr) + sizeof(struct hp_llc) + \
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sizeof(struct rmp_boot_done))
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#define RMPBOOTDATA 255
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#define RMPREADDATA (RMPDATALEN - \
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(2*sizeof(u_int8_t)+sizeof(u_int16_t)+sizeof(u_word)))
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/*
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* This protocol defines some field sizes as "rest of ethernet packet".
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* There is no easy way to specify this in C, so we use a one character
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* field to denote it, and index past it to the end of the packet.
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*/
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typedef char restofpkt;
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/*
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* Due to the RMP packet layout, we'll run into alignment problems
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* on machines that can't access (or don't, by default, align) words
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* on half-word boundaries. If you know that your machine does not suffer
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* from this problem, add it to the vax/tahoe/m68k #define below.
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*
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* The following macros are used to deal with this problem:
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* WORDZE(w) Return True if u_word `w' is zero, False otherwise.
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* ZEROWORD(w) Set u_word `w' to zero.
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* COPYWORD(w1,w2) Copy u_word `w1' to `w2'.
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* GETWORD(w,i) Copy u_word `w' into int `i'.
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* PUTWORD(i,w) Copy int `i' into u_word `w'.
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*
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* N.B. Endianness is handled by use of ntohl/htonl
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*/
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#if defined(__vax__) || defined(__tahoe__) || defined(__m68k__)
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typedef u_int32_t u_word;
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#define WORDZE(w) ((w) == 0)
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#define ZEROWORD(w) (w) = 0
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#define COPYWORD(w1,w2) (w2) = (w1)
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#define GETWORD(w, i) (i) = ntohl(w)
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#define PUTWORD(i, w) (w) = htonl(i)
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#else
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#define _WORD_HIGHPART 0
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#define _WORD_LOWPART 1
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typedef struct _uword { u_int16_t val[2]; } u_word;
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#define WORDZE(w) \
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((w.val[_WORD_HIGHPART] == 0) && (w.val[_WORD_LOWPART] == 0))
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#define ZEROWORD(w) \
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(w).val[_WORD_HIGHPART] = (w).val[_WORD_LOWPART] = 0
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#define COPYWORD(w1, w2) \
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{ (w2).val[_WORD_HIGHPART] = (w1).val[_WORD_HIGHPART]; \
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(w2).val[_WORD_LOWPART] = (w1).val[_WORD_LOWPART]; \
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}
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#define GETWORD(w, i) \
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(i) = (((u_int32_t)ntohs((w).val[_WORD_HIGHPART])) << 16) | ntohs((w).val[_WORD_LOWPART])
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#define PUTWORD(i, w) \
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{ (w).val[_WORD_HIGHPART] = htons((u_int16_t) ((i >> 16) & 0xffff)); \
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(w).val[_WORD_LOWPART] = htons((u_int16_t) (i & 0xffff)); \
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}
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#endif
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/*
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* Packet structures.
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*/
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struct rmp_raw { /* generic RMP packet */
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u_int8_t rmp_type; /* packet type */
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u_int8_t rmp_rawdata[RMPDATALEN-1];
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};
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struct rmp_boot_req { /* boot request */
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u_int8_t rmp_type; /* packet type (RMP_BOOT_REQ) */
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u_int8_t rmp_retcode; /* return code (0) */
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u_word rmp_seqno; /* sequence number (real time clock) */
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u_int16_t rmp_session; /* session id (normally 0) */
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u_int16_t rmp_version; /* protocol version (RMP_VERSION) */
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char rmp_machtype[RMP_MACHLEN]; /* machine type */
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u_int8_t rmp_flnmsize; /* length of rmp_flnm */
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restofpkt rmp_flnm; /* name of file to be read */
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};
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struct rmp_boot_repl { /* boot reply */
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u_int8_t rmp_type; /* packet type (RMP_BOOT_REPL) */
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u_int8_t rmp_retcode; /* return code (normally 0) */
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u_word rmp_seqno; /* sequence number (from boot req) */
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u_int16_t rmp_session; /* session id (generated) */
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u_int16_t rmp_version; /* protocol version (RMP_VERSION) */
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u_int8_t rmp_flnmsize; /* length of rmp_flnm */
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restofpkt rmp_flnm; /* name of file (from boot req) */
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};
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struct rmp_read_req { /* read request */
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u_int8_t rmp_type; /* packet type (RMP_READ_REQ) */
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u_int8_t rmp_retcode; /* return code (0) */
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u_word rmp_offset; /* file relative byte offset */
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u_int16_t rmp_session; /* session id (from boot repl) */
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u_int16_t rmp_size; /* max no of bytes to send */
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};
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struct rmp_read_repl { /* read reply */
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u_int8_t rmp_type; /* packet type (RMP_READ_REPL) */
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u_int8_t rmp_retcode; /* return code (normally 0) */
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u_word rmp_offset; /* byte offset (from read req) */
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u_int16_t rmp_session; /* session id (from read req) */
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restofpkt rmp_data; /* data (max size from read req) */
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u_int8_t rmp_unused; /* padding to 16-bit boundary */
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};
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struct rmp_boot_done { /* boot complete */
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u_int8_t rmp_type; /* packet type (RMP_BOOT_DONE) */
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u_int8_t rmp_retcode; /* return code (0) */
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u_word rmp_unused; /* not used (0) */
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u_int16_t rmp_session; /* session id (from read repl) */
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};
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struct rmp_packet {
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struct hp_hdr hp_hdr;
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struct hp_llc hp_llc;
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union {
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struct rmp_boot_req rmp_brq; /* boot request */
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struct rmp_boot_repl rmp_brpl; /* boot reply */
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struct rmp_read_req rmp_rrq; /* read request */
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struct rmp_read_repl rmp_rrpl; /* read reply */
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struct rmp_boot_done rmp_done; /* boot complete */
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struct rmp_raw rmp_raw; /* raw data */
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} rmp_proto;
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};
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/*
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* Make life easier...
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*/
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#define r_type rmp_proto.rmp_raw.rmp_type
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#define r_data rmp_proto.rmp_raw.rmp_rawdata
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#define r_brq rmp_proto.rmp_brq
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#define r_brpl rmp_proto.rmp_brpl
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#define r_rrq rmp_proto.rmp_rrq
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#define r_rrpl rmp_proto.rmp_rrpl
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#define r_done rmp_proto.rmp_done
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