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Diffstat (limited to 'libntlm-0.21/smbbyteorder.h')
| -rw-r--r-- | libntlm-0.21/smbbyteorder.h | 265 |
1 files changed, 0 insertions, 265 deletions
diff --git a/libntlm-0.21/smbbyteorder.h b/libntlm-0.21/smbbyteorder.h deleted file mode 100644 index 59ae4979..00000000 --- a/libntlm-0.21/smbbyteorder.h +++ /dev/null @@ -1,265 +0,0 @@ -/* - Unix SMB/Netbios implementation. - Version 1.9. - SMB Byte handling - Copyright (C) Andrew Tridgell 1992-1998 - - 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. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. -*/ - -#ifndef _BYTEORDER_H -#define _BYTEORDER_H - -/* - This file implements macros for machine independent short and - int manipulation - -Here is a description of this file that I emailed to the samba list once: - -> I am confused about the way that byteorder.h works in Samba. I have -> looked at it, and I would have thought that you might make a distinction -> between LE and BE machines, but you only seem to distinguish between 386 -> and all other architectures. -> -> Can you give me a clue? - -sure. - -The distinction between 386 and other architectures is only there as -an optimisation. You can take it out completely and it will make no -difference. The routines (macros) in byteorder.h are totally byteorder -independent. The 386 optimsation just takes advantage of the fact that -the x86 processors don't care about alignment, so we don't have to -align ints on int boundaries etc. If there are other processors out -there that aren't alignment sensitive then you could also define -CAREFUL_ALIGNMENT=0 on those processors as well. - -Ok, now to the macros themselves. I'll take a simple example, say we -want to extract a 2 byte integer from a SMB packet and put it into a -type called uint16 that is in the local machines byte order, and you -want to do it with only the assumption that uint16 is _at_least_ 16 -bits long (this last condition is very important for architectures -that don't have any int types that are 2 bytes long) - -You do this: - -#define CVAL(buf,pos) (((unsigned char *)(buf))[pos]) -#define PVAL(buf,pos) ((unsigned)CVAL(buf,pos)) -#define SVAL(buf,pos) (PVAL(buf,pos)|PVAL(buf,(pos)+1)<<8) - -then to extract a uint16 value at offset 25 in a buffer you do this: - -char *buffer = foo_bar(); -uint16 xx = SVAL(buffer,25); - -We are using the byteoder independence of the ANSI C bitshifts to do -the work. A good optimising compiler should turn this into efficient -code, especially if it happens to have the right byteorder :-) - -I know these macros can be made a bit tidier by removing some of the -casts, but you need to look at byteorder.h as a whole to see the -reasoning behind them. byteorder.h defines the following macros: - -SVAL(buf,pos) - extract a 2 byte SMB value -IVAL(buf,pos) - extract a 4 byte SMB value -SVALS(buf,pos) signed version of SVAL() -IVALS(buf,pos) signed version of IVAL() - -SSVAL(buf,pos,val) - put a 2 byte SMB value into a buffer -SIVAL(buf,pos,val) - put a 4 byte SMB value into a buffer -SSVALS(buf,pos,val) - signed version of SSVAL() -SIVALS(buf,pos,val) - signed version of SIVAL() - -RSVAL(buf,pos) - like SVAL() but for NMB byte ordering -RSVALS(buf,pos) - like SVALS() but for NMB byte ordering -RIVAL(buf,pos) - like IVAL() but for NMB byte ordering -RIVALS(buf,pos) - like IVALS() but for NMB byte ordering -RSSVAL(buf,pos,val) - like SSVAL() but for NMB ordering -RSIVAL(buf,pos,val) - like SIVAL() but for NMB ordering -RSIVALS(buf,pos,val) - like SIVALS() but for NMB ordering - -it also defines lots of intermediate macros, just ignore those :-) - -*/ - -/* some switch macros that do both store and read to and from SMB buffers */ - -#define RW_PCVAL(read,inbuf,outbuf,len) \ - { if (read) { PCVAL (inbuf,0,outbuf,len); } \ - else { PSCVAL(inbuf,0,outbuf,len); } } - -#define RW_PIVAL(read,big_endian,inbuf,outbuf,len) \ - { if (read) { if (big_endian) { RPIVAL(inbuf,0,outbuf,len); } else { PIVAL(inbuf,0,outbuf,len); } } \ - else { if (big_endian) { RPSIVAL(inbuf,0,outbuf,len); } else { PSIVAL(inbuf,0,outbuf,len); } } } - -#define RW_PSVAL(read,big_endian,inbuf,outbuf,len) \ - { if (read) { if (big_endian) { RPSVAL(inbuf,0,outbuf,len); } else { PSVAL(inbuf,0,outbuf,len); } } \ - else { if (big_endian) { RPSSVAL(inbuf,0,outbuf,len); } else { PSSVAL(inbuf,0,outbuf,len); } } } - -#define RW_CVAL(read, inbuf, outbuf, offset) \ - { if (read) { (outbuf) = CVAL (inbuf,offset); } \ - else { SCVAL(inbuf,offset,outbuf); } } - -#define RW_IVAL(read, big_endian, inbuf, outbuf, offset) \ - { if (read) { (outbuf) = ((big_endian) ? RIVAL(inbuf,offset) : IVAL (inbuf,offset)); } \ - else { if (big_endian) { RSIVAL(inbuf,offset,outbuf); } else { SIVAL(inbuf,offset,outbuf); } } } - -#define RW_SVAL(read, big_endian, inbuf, outbuf, offset) \ - { if (read) { (outbuf) = ((big_endian) ? RSVAL(inbuf,offset) : SVAL (inbuf,offset)); } \ - else { if (big_endian) { RSSVAL(inbuf,offset,outbuf); } else { SSVAL(inbuf,offset,outbuf); } } } - -#undef CAREFUL_ALIGNMENT - -/* we know that the 386 can handle misalignment and has the "right" - byteorder */ -#ifdef __i386__ -#define CAREFUL_ALIGNMENT 0 -#endif - -#ifndef CAREFUL_ALIGNMENT -#define CAREFUL_ALIGNMENT 1 -#endif - -#define CVAL(buf,pos) (((unsigned char *)(buf))[pos]) -#define PVAL(buf,pos) ((unsigned)CVAL(buf,pos)) -#define SCVAL(buf,pos,val) (CVAL(buf,pos) = (val)) - - -#if CAREFUL_ALIGNMENT - -#define SVAL(buf,pos) (PVAL(buf,pos)|PVAL(buf,(pos)+1)<<8) -#define IVAL(buf,pos) (SVAL(buf,pos)|SVAL(buf,(pos)+2)<<16) -#define SSVALX(buf,pos,val) (CVAL(buf,pos)=(val)&0xFF,CVAL(buf,pos+1)=(val)>>8) -#define SIVALX(buf,pos,val) (SSVALX(buf,pos,val&0xFFFF),SSVALX(buf,pos+2,val>>16)) -#define SVALS(buf,pos) ((int16)SVAL(buf,pos)) -#define IVALS(buf,pos) ((int32)IVAL(buf,pos)) -#define SSVAL(buf,pos,val) SSVALX((buf),(pos),((uint16)(val))) -#define SIVAL(buf,pos,val) SIVALX((buf),(pos),((uint32)(val))) -#define SSVALS(buf,pos,val) SSVALX((buf),(pos),((int16)(val))) -#define SIVALS(buf,pos,val) SIVALX((buf),(pos),((int32)(val))) - -#else /* CAREFUL_ALIGNMENT */ - -/* this handles things for architectures like the 386 that can handle - alignment errors */ -/* - WARNING: This section is dependent on the length of int16 and int32 - being correct -*/ - -/* get single value from an SMB buffer */ -#define SVAL(buf,pos) (*(uint16 *)((char *)(buf) + (pos))) -#define IVAL(buf,pos) (*(uint32 *)((char *)(buf) + (pos))) -#define SVALS(buf,pos) (*(int16 *)((char *)(buf) + (pos))) -#define IVALS(buf,pos) (*(int32 *)((char *)(buf) + (pos))) - -/* store single value in an SMB buffer */ -#define SSVAL(buf,pos,val) SVAL(buf,pos)=((uint16)(val)) -#define SIVAL(buf,pos,val) IVAL(buf,pos)=((uint32)(val)) -#define SSVALS(buf,pos,val) SVALS(buf,pos)=((int16)(val)) -#define SIVALS(buf,pos,val) IVALS(buf,pos)=((int32)(val)) - -#endif /* CAREFUL_ALIGNMENT */ - -/* macros for reading / writing arrays */ - -#define SMBMACRO(macro,buf,pos,val,len,size) \ -{ int l; for (l = 0; l < (len); l++) (val)[l] = macro((buf), (pos) + (size)*l); } - -#define SSMBMACRO(macro,buf,pos,val,len,size) \ -{ int l; for (l = 0; l < (len); l++) macro((buf), (pos) + (size)*l, (val)[l]); } - -/* reads multiple data from an SMB buffer */ -#define PCVAL(buf,pos,val,len) SMBMACRO(CVAL,buf,pos,val,len,1) -#define PSVAL(buf,pos,val,len) SMBMACRO(SVAL,buf,pos,val,len,2) -#define PIVAL(buf,pos,val,len) SMBMACRO(IVAL,buf,pos,val,len,4) -#define PCVALS(buf,pos,val,len) SMBMACRO(CVALS,buf,pos,val,len,1) -#define PSVALS(buf,pos,val,len) SMBMACRO(SVALS,buf,pos,val,len,2) -#define PIVALS(buf,pos,val,len) SMBMACRO(IVALS,buf,pos,val,len,4) - -/* stores multiple data in an SMB buffer */ -#define PSCVAL(buf,pos,val,len) SSMBMACRO(SCVAL,buf,pos,val,len,1) -#define PSSVAL(buf,pos,val,len) SSMBMACRO(SSVAL,buf,pos,val,len,2) -#define PSIVAL(buf,pos,val,len) SSMBMACRO(SIVAL,buf,pos,val,len,4) -#define PSCVALS(buf,pos,val,len) SSMBMACRO(SCVALS,buf,pos,val,len,1) -#define PSSVALS(buf,pos,val,len) SSMBMACRO(SSVALS,buf,pos,val,len,2) -#define PSIVALS(buf,pos,val,len) SSMBMACRO(SIVALS,buf,pos,val,len,4) - - -/* now the reverse routines - these are used in nmb packets (mostly) */ -#define SREV(x) ((((x)&0xFF)<<8) | (((x)>>8)&0xFF)) -#define IREV(x) ((SREV(x)<<16) | (SREV((x)>>16))) - -#define RSVAL(buf,pos) SREV(SVAL(buf,pos)) -#define RSVALS(buf,pos) SREV(SVALS(buf,pos)) -#define RIVAL(buf,pos) IREV(IVAL(buf,pos)) -#define RIVALS(buf,pos) IREV(IVALS(buf,pos)) -#define RSSVAL(buf,pos,val) SSVAL(buf,pos,SREV(val)) -#define RSSVALS(buf,pos,val) SSVALS(buf,pos,SREV(val)) -#define RSIVAL(buf,pos,val) SIVAL(buf,pos,IREV(val)) -#define RSIVALS(buf,pos,val) SIVALS(buf,pos,IREV(val)) - -/* reads multiple data from an SMB buffer (big-endian) */ -#define RPSVAL(buf,pos,val,len) SMBMACRO(RSVAL,buf,pos,val,len,2) -#define RPIVAL(buf,pos,val,len) SMBMACRO(RIVAL,buf,pos,val,len,4) -#define RPSVALS(buf,pos,val,len) SMBMACRO(RSVALS,buf,pos,val,len,2) -#define RPIVALS(buf,pos,val,len) SMBMACRO(RIVALS,buf,pos,val,len,4) - -/* stores multiple data in an SMB buffer (big-endian) */ -#define RPSSVAL(buf,pos,val,len) SSMBMACRO(RSSVAL,buf,pos,val,len,2) -#define RPSIVAL(buf,pos,val,len) SSMBMACRO(RSIVAL,buf,pos,val,len,4) -#define RPSSVALS(buf,pos,val,len) SSMBMACRO(RSSVALS,buf,pos,val,len,2) -#define RPSIVALS(buf,pos,val,len) SSMBMACRO(RSIVALS,buf,pos,val,len,4) - -#define DBG_RW_PCVAL(charmode,string,depth,base,read,inbuf,outbuf,len) \ - { RW_PCVAL(read,inbuf,outbuf,len) \ - DEBUG(5,("%s%04x %s: ", \ - tab_depth(depth), base,string)); \ - if (charmode) print_asc(5, (unsigned char*)(outbuf), (len)); else \ - { int idx; for (idx = 0; idx < len; idx++) { DEBUG(5,("%02x ", (outbuf)[idx])); } } \ - DEBUG(5,("\n")); } - -#define DBG_RW_PSVAL(charmode,string,depth,base,read,big_endian,inbuf,outbuf,len) \ - { RW_PSVAL(read,big_endian,inbuf,outbuf,len) \ - DEBUG(5,("%s%04x %s: ", \ - tab_depth(depth), base,string)); \ - if (charmode) print_asc(5, (unsigned char*)(outbuf), 2*(len)); else \ - { int idx; for (idx = 0; idx < len; idx++) { DEBUG(5,("%04x ", (outbuf)[idx])); } } \ - DEBUG(5,("\n")); } - -#define DBG_RW_PIVAL(charmode,string,depth,base,read,big_endian,inbuf,outbuf,len) \ - { RW_PIVAL(read,big_endian,inbuf,outbuf,len) \ - DEBUG(5,("%s%04x %s: ", \ - tab_depth(depth), base,string)); \ - if (charmode) print_asc(5, (unsigned char*)(outbuf), 4*(len)); else \ - { int idx; for (idx = 0; idx < len; idx++) { DEBUG(5,("%08x ", (outbuf)[idx])); } } \ - DEBUG(5,("\n")); } - -#define DBG_RW_CVAL(string,depth,base,read,inbuf,outbuf) \ - { RW_CVAL(read,inbuf,outbuf,0) \ - DEBUG(5,("%s%04x %s: %02x\n", \ - tab_depth(depth), base, string, outbuf)); } - -#define DBG_RW_SVAL(string,depth,base,read,big_endian,inbuf,outbuf) \ - { RW_SVAL(read,big_endian,inbuf,outbuf,0) \ - DEBUG(5,("%s%04x %s: %04x\n", \ - tab_depth(depth), base, string, outbuf)); } - -#define DBG_RW_IVAL(string,depth,base,read,big_endian,inbuf,outbuf) \ - { RW_IVAL(read,big_endian,inbuf,outbuf,0) \ - DEBUG(5,("%s%04x %s: %08x\n", \ - tab_depth(depth), base, string, outbuf)); } - -#endif /* _BYTEORDER_H */ |