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/*****************************************************************************/
/*
MapCon.c
Mapping conditional processing.
See MAPURL.C for description of "Mapping Conditionals".
VERSION HISTORY
---------------
07-OCT-2004 MGD unbundled from MAPURL.C
*/
/*****************************************************************************/
#ifdef WASD_VMS_V7
#undef _VMS__V6__SOURCE
#define _VMS__V6__SOURCE
#undef __VMS_VER
#undef __VMS_VER
#undef __CRTL_VER
#define __CRTL_VER 70000000
#endif
/* application header */
#include "wasd.h"
#define WASD_MODULE "MAPCON"
/********************/
/* external storage */
/********************/
extern WATCH_STRUCT Watch;
/*****************************************************************************/
/*
Scan the conditional string evaluating the conditions!
Return true or false.
Anything it cannot understand it ignores!
*/
BOOL MapConString
(
REQUEST_STRUCT *rqptr,
MAP_RULE_META *mrptr,
REQUEST_PATHSET *rqpsptr
)
{
BOOL NegateThisCondition,
NegateEntireConditional,
Result,
SoFarSoGood;
int idx, status,
ConditionalCount,
WatchThisOne;
char *cptr, *sptr, *tptr, *zptr,
*CurrentPtr;
char Scratch [2048];
DICT_ENTRY_STRUCT *denptr;
/*********/
/* begin */
/*********/
if (WATCHMOD (rqptr, WATCH_MOD_MAPURL))
WatchThis (WATCHITM(rqptr), WATCH_MOD_MAPURL,
"MapConString() !&Z", mrptr->ConditionalPtr);
if (WATCHING (rqptr, WATCH_MAPPING))
WatchThisOne = WATCH_MAPPING;
else
WatchThisOne = 0;
CurrentPtr = NULL;
ConditionalCount = 0;
NegateEntireConditional = NegateThisCondition = SoFarSoGood = false;
cptr = mrptr->ConditionalPtr;
if (WATCH_CAT && WatchThisOne)
WatchDataFormatted ("conditional !AZ\n", cptr);
while (*cptr)
{
while (ISLWS(*cptr)) cptr++;
if (!*cptr) break;
if (*cptr == '[' || SAME2(cptr,'!['))
{
if (*cptr == '!')
{
NegateEntireConditional = true;
cptr++;
}
else
NegateEntireConditional = false;
cptr++;
ConditionalCount = 0;
SoFarSoGood = false;
continue;
}
if (*cptr == ']')
{
cptr++;
if (NegateEntireConditional)
{
SoFarSoGood = !SoFarSoGood;
NegateEntireConditional = false;
}
if (ConditionalCount && !SoFarSoGood)
{
cptr = "";
break;
}
continue;
}
if (SoFarSoGood)
{
if (NegateEntireConditional)
{
SoFarSoGood = !SoFarSoGood;
NegateEntireConditional = false;
}
/* at least one OK, skip to the end of the conditional */
while (*cptr && *cptr != ']') cptr++;
/* remember, there may be more than one per line */
if (*cptr) continue;
break;
}
CurrentPtr = cptr;
NegateThisCondition = Result = false;
zptr = (sptr = Scratch) + sizeof(Scratch)-1;
if (*cptr == '!')
{
cptr++;
NegateThisCondition = true;
}
switch (*(USHORTPTR)cptr)
{
case 'AC' :
/*************/
/* "Accept:" */
/*************/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
if (rqptr->rqHeader.AcceptPtr)
Result = MapConList (rqptr, Scratch,
rqptr->rqHeader.AcceptPtr);
break;
case 'AL' :
/**********************/
/* "Accept-Language:" */
/**********************/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
Result = MapConList (rqptr, Scratch,
rqptr->rqHeader.AcceptLangPtr);
break;
case 'AS' :
/*********************/
/* "Accept-Charset:" */
/*********************/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
Result = MapConList (rqptr, Scratch,
rqptr->rqHeader.AcceptCharsetPtr);
break;
case 'CA' :
/************/
/* callout? */
/************/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']') cptr++;
Result = rqptr->rqCgi.CalloutInProgress;
break;
case 'CK' :
/**********/
/* cookie */
/**********/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
Result = StringMatchGreedyRegex (rqptr,
rqptr->rqHeader.CookiePtr,
Scratch);
break;
case 'DR' :
/*****************/
/* document root */
/*****************/
/* map=root=<string> */
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
if (rqpsptr->MapRootPtr)
Result = StringMatchGreedyRegex (rqptr,
rqpsptr->MapRootPtr,
Scratch);
else
Result = false;
break;
case 'EX' :
/**********************/
/* extended file path */
/**********************/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']') cptr++;
Result = rqptr->PathOdsExtended;
break;
case 'HM' :
/****************************/
/* client host network mask */
/****************************/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
tptr = Scratch; /* preserve string address using ptr */
status = TcpIpNetMask (rqptr, WATCH_MAPPING, &tptr,
&rqptr->ClientPtr->IpAddress);
/* if there's a problem with the mask then just fail it */
if (VMSnok(status) && status != SS$_UNREACHABLE) return (false);
Result = (status == SS$_NORMAL);
break;
case 'HO' :
/****************************/
/* client host name/address */
/****************************/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
for (sptr = Scratch; *sptr && !isalnum(*sptr); sptr++);
if (isdigit(*sptr))
sptr = &rqptr->ClientPtr->IpAddressString;
else
sptr = rqptr->ClientPtr->Lookup.HostName;
Result = StringMatchGreedyRegex (rqptr, sptr, Scratch);
break;
case 'FO' :
/*******************/
/* proxy forwarded */
/*******************/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
/* it's unlikely we'll have any of this header field */
if (rqptr->rqHeader.ForwardedPtr)
Result = MapConList (rqptr, Scratch,
rqptr->rqHeader.ForwardedPtr);
break;
case 'ME' :
/***************/
/* HTTP method */
/***************/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
if (Scratch[0] == '?')
Result = (rqptr->rqHeader.Method == HTTP_METHOD_EXTENSION);
else
Result = StringMatchGreedyRegex (rqptr,
rqptr->rqHeader.MethodName,
Scratch);
break;
case 'MP' :
/*********************/
/* being mapped path */
/*********************/
/* path remaining after script/exec rule, or after a 'map' rule */
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
if (rqptr->MetaConMappedPtr)
Result = StringMatchGreedyRegex (rqptr,
rqptr->MetaConMappedPtr,
Scratch);
else
Result = false;
break;
case 'NO' :
/***********/
/* notepad */
/***********/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
if (rqptr->NotePadPtr)
Result = StringMatchGreedyRegex (rqptr,
rqptr->NotePadPtr,
Scratch);
else
Result = false;
break;
case 'PA' :
/********/
/* pass */
/********/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
Result = (Scratch[0] - '0' == rqptr->MetaConPass);
break;
case 'PI' :
/*************/
/* path-info */
/*************/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
Result = StringMatchGreedyRegex (rqptr,
rqptr->rqHeader.PathInfoPtr,
Scratch);
break;
case 'QS' :
/****************/
/* query string */
/****************/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
Result = StringMatchGreedyRegex (rqptr,
rqptr->rqHeader.QueryStringPtr,
Scratch);
break;
case 'RC' :
/********************/
/* redirected count */
/********************/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
if (Scratch[0])
Result = (Scratch[0] - '0' == rqptr->RedirectCount);
else
Result = rqptr->RedirectCount;
break;
case 'RF' :
/****************/
/* refering URL */
/****************/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
Result = StringMatchGreedyRegex (rqptr,
rqptr->rqHeader.RefererPtr,
Scratch);
break;
case 'RQ' :
/****************4*/
/* request field */
/*****************/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && \
*cptr != ':' && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
if (denptr = DictLookup (rqptr->rqDictPtr, DICT_TYPE_REQUEST,
Scratch, sptr - Scratch))
{
if (*sptr == ':')
{
sptr++;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
Result = StringMatchGreedyRegex (rqptr, sptr, Scratch);
}
else
Result = true;
if (Result) break;
}
break;
case 'RU' :
/***************/
/* request URI */
/***************/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
Result = StringMatchGreedyRegex (rqptr,
rqptr->rqHeader.RequestUriPtr,
Scratch);
break;
case 'SC' :
/****************************************/
/* request scheme ("http:" or "https:") */
/****************************************/
ConditionalCount++;
cptr += 3;
/* also ignore any trailing colon on the scheme string */
while (*cptr && !ISLWS(*cptr) && *cptr != ':' && *cptr != ']' &&
sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
if (*cptr == ':') cptr++;
/* any trailing colon has been stripped */
if (strsame (Scratch, "https", -1) &&
rqptr->ServicePtr->RequestScheme == SCHEME_HTTPS)
Result = true;
else
if (strsame (Scratch, "http", -1) &&
rqptr->ServicePtr->RequestScheme == SCHEME_HTTP)
Result = true;
else
Result = false;
break;
case 'SN' :
/***************/
/* server name */
/***************/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
Result = StringMatchGreedyRegex (rqptr,
rqptr->ServicePtr->ServerHostName,
Scratch);
break;
case 'SP' :
/***************/
/* server port */
/***************/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
Result = StringMatchGreedyRegex (rqptr,
rqptr->ServicePtr->ServerPortString,
Scratch);
break;
case 'ST' :
/***************/
/* script name */
/***************/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
if (sptr = rqptr->MetaConScriptPtr)
{
if (*sptr == '+')
{
/* CGIplus indicator */
*sptr = '/';
Result = StringMatchGreedyRegex (rqptr, sptr, Scratch);
*sptr = '+';
}
else
Result = StringMatchGreedyRegex (rqptr, sptr, Scratch);
}
else
Result = false;
break;
case 'UA' :
/*****************/
/* "User-Agent:" */
/*****************/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
Result = StringMatchGreedyRegex (rqptr,
rqptr->rqHeader.UserAgentPtr,
Scratch);
break;
case 'VS' :
case 'HH' : /* backward compatibility */
/******************************************/
/* virtual service ("Host:") name/address */
/******************************************/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
Result = StringMatchGreedyRegex (rqptr,
rqptr->rqHeader.HostPtr,
Scratch);
break;
case 'XF' :
/*******************/
/* x-forwarded-for */
/*******************/
ConditionalCount++;
cptr += 3;
while (*cptr && !ISLWS(*cptr) && *cptr != ']' && sptr < zptr)
{
if (*cptr == '\\') cptr++;
if (*cptr) *sptr++ = *cptr++;
}
*sptr = '\0';
Result = StringMatchGreedyRegex (rqptr,
rqptr->rqHeader.XForwardedForPtr,
Scratch);
break;
default :
/*******************/
/* unknown, ignore */
/*******************/
/* should never occur due to basic check in MapUrl_ConfigLoad()! */
if (WATCH_CAT && WatchThisOne)
WatchDataFormatted ("IGNORE !AZ\n", CurrentPtr);
while (*cptr && !ISLWS(*cptr) && *cptr != ']') cptr++;
continue;
}
if (NegateThisCondition)
SoFarSoGood = SoFarSoGood || !Result;
else
SoFarSoGood = SoFarSoGood || Result;
if (WATCH_CAT && WatchThisOne)
WatchDataFormatted ("!AZ !AZ\n",
SoFarSoGood ? "MATCH" : "NOMATCH", CurrentPtr);
}
if (!ConditionalCount)
SoFarSoGood = true;
else
if (NegateEntireConditional)
SoFarSoGood = !SoFarSoGood;
if (WATCH_CAT && WatchThisOne)
WatchDataFormatted ("!AZ conditional\n",
SoFarSoGood ? "PASSED" : "FAILED");
return (SoFarSoGood);
}
/*****************************************************************************/
/*
Compare single "??:" conditional string to each of a comma-separated list in
the form "item" or "item1, item2, item3", etc. String may contain '*' and '%'
wildcards. We can munge the list string like this because we're operating at
AST-delivery level and cannot be preempted!
*/
BOOL MapConList
(
REQUEST_STRUCT *rqptr,
char *String,
char *List
)
{
char ch;
char *cptr, *lptr;
/*********/
/* begin */
/*********/
if (WATCHMOD (rqptr, WATCH_MOD_MAPURL))
WatchThis (WATCHITM(rqptr), WATCH_MOD_MAPURL,
"MapConList() !&Z !&Z", String, List);
if (!(lptr = List)) return (false);
if (!String) return (false);
while (*lptr)
{
/* spaces and commas are element separators, step over */
while (ISLWS(*lptr) || *lptr == ',') lptr++;
/* if end of list (or empty) then finished */
if (!*lptr) return (false);
/* find end of this element, save next character, terminate element */
for (cptr = lptr; *lptr && !ISLWS(*lptr) && *lptr != ','; lptr++);
ch = *lptr;
*lptr = '\0';
/* look for what we want */
if (StringMatchGreedyRegex (rqptr, cptr, String))
{
/* restore list */
*lptr = ch;
return (true);
}
/* restore list */
*lptr = ch;
}
/* ran out of list elements, so it can't be a match! */
return (false);
}
/*****************************************************************************/