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/* Configuration manager for Hypertext Daemon HTRules.c
** ==========================================
**
**
** History:
** 3 Jun 91 Written TBL
** 10 Aug 91 Authorisation added after Daniel Martin (pass, fail)
** Rule order in file changed
** Comments allowed with # on 1st char of rule line
** 17 Jun 92 Bug fix: pass and fail failed if didn't contain '*' TBL
** 1 Sep 93 Bug fix: no memory check - Nathan Torkington
** BYTE_ADDRESSING removed - Arthur Secret
** 11 Sep 93 MD Changed %i into %d in debug printf.
** VMS does not recognize %i.
** Bug Fix: in case of PASS, only one parameter to printf.
** 19 Sep 93 AL Added Access Authorization stuff.
** 1 Nov 93 AL Added htbin.
**
*/
/* (c) CERN WorldWideWeb project 1990,91. See Copyright.html for details */
#include "HTRules.h"
#include "HTUtils.h"
#include "tcp.h"
/*#include <stdio.h> included by HTUtils.h -- FM */
#include "HTFile.h"
#include "HTAAServ.h" /* Access Authorization */
#include "LYLeaks.h"
#define LINE_LENGTH 256
typedef struct _rule {
struct _rule * next;
HTRuleOp op;
char * pattern;
char * equiv;
} rule;
/* Global variables
** ----------------
*/
PUBLIC char *HTBinDir = NULL; /* Physical /htbin directory path. */
/* In future this should not be global. */
PUBLIC char *HTSearchScript = NULL; /* Search script name. */
/* Module-wide variables
** ---------------------
*/
PRIVATE rule * rules = 0; /* Pointer to first on list */
#ifndef PUT_ON_HEAD
PRIVATE rule * rule_tail = 0; /* Pointer to last on list */
#endif
/* Add rule to the list HTAddRule()
** --------------------
**
** On entry,
** pattern points to 0-terminated string containing a single "*"
** equiv points to the equivalent string with * for the
** place where the text matched by * goes.
** On exit,
** returns 0 if success, -1 if error.
*/
#ifdef __STDC__
PUBLIC int HTAddRule (HTRuleOp op, const char * pattern, const char * equiv)
#else
int HTAddRule(op, pattern, equiv)
HTRuleOp op;
char * pattern;
char * equiv;
#endif
{ /* BYTE_ADDRESSING removed and memory check - AS - 1 Sep 93 */
rule * temp;
char * pPattern;
temp = (rule *)malloc(sizeof(*temp));
if (temp==NULL)
outofmem(__FILE__, "HTAddRule");
pPattern = (char *)malloc(strlen(pattern)+1);
if (pPattern==NULL)
outofmem(__FILE__, "HTAddRule");
if (equiv) { /* Two operands */
char * pEquiv = (char *)malloc(strlen(equiv)+1);
if (pEquiv==NULL)
outofmem(__FILE__, "HTAddRule");
temp->equiv = pEquiv;
strcpy(pEquiv, equiv);
} else {
temp->equiv = 0;
}
temp->pattern = pPattern;
temp->op = op;
strcpy(pPattern, pattern);
if (TRACE) {
if (equiv)
fprintf(stderr, "Rule: For `%s' op %d `%s'\n", pattern, op, equiv);
else
fprintf(stderr, "Rule: For `%s' op %d\n", pattern, op);
}
#ifdef PUT_ON_HEAD
temp->next = rules;
rules = temp;
#else
temp->next = 0;
if (rule_tail) rule_tail->next = temp;
else rules = temp;
rule_tail = temp;
#endif
return 0;
}
/* Clear all rules HTClearRules()
** ---------------
**
** On exit,
** There are no rules
** returns 0 if success, -1 if error.
**
** See also
** HTAddRule()
*/
#ifdef __STDC__
int HTClearRules(void)
#else
int HTClearRules()
#endif
{
while (rules) {
rule * temp = rules;
rules = temp->next;
FREE(temp->pattern);
FREE(temp->equiv);
FREE(temp);
}
#ifndef PUT_ON_HEAD
rule_tail = 0;
#endif
return 0;
}
/* Translate by rules HTTranslate()
** ------------------
**
** The most recently defined rules are applied first.
**
** On entry,
** required points to a string whose equivalent value is neeed
** On exit,
** returns the address of the equivalent string allocated from
** the heap which the CALLER MUST FREE. If no translation
** occured, then it is a copy of te original.
** NEW FEATURES:
** When a "protect" or "defprot" rule is mathed,
** a call to HTAA_setCurrentProtection() or
** HTAA_setDefaultProtection() is made to notify
** the Access Authorization module that the file is
** protected, and so it knows how to handle it.
** -- AL
*/
#ifdef __STDC__
char * HTTranslate(const char * required)
#else
char * HTTranslate(required)
char * required;
#endif
{
rule * r;
char *current = NULL;
StrAllocCopy(current, required);
HTAA_clearProtections(); /* Reset from previous call -- AL */
for(r = rules; r; r = r->next) {
char * p = r->pattern;
int m=0; /* Number of characters matched against wildcard */
CONST char * q = current;
for(;*p && *q; p++, q++) { /* Find first mismatch */
if (*p!=*q) break;
}
if (*p == '*') { /* Match up to wildcard */
m = strlen(q) - strlen(p+1); /* Amount to match to wildcard */
if(m<0) continue; /* tail is too short to match */
if (0!=strcmp(q+m, p+1)) continue; /* Tail mismatch */
} else /* Not wildcard */
if (*p != *q) continue; /* plain mismatch: go to next rule */
switch (r->op) { /* Perform operation */
#ifdef ACCESS_AUTH
case HT_DefProt:
case HT_Protect:
{
char *local_copy = NULL;
char *p;
char *eff_ids = NULL;
char *prot_file = NULL;
if (TRACE) fprintf(stderr,
"HTRule: `%s' matched %s %s: `%s'\n",
current,
(r->op==HT_Protect ? "Protect" : "DefProt"),
"rule, setup",
(r->equiv ? r->equiv :
(r->op==HT_Protect ?"DEFAULT" :"NULL!!")));
if (r->equiv) {
StrAllocCopy(local_copy, r->equiv);
p = local_copy;
prot_file = HTNextField(&p);
eff_ids = HTNextField(&p);
}
if (r->op == HT_Protect)
HTAA_setCurrentProtection(current, prot_file, eff_ids);
else
HTAA_setDefaultProtection(current, prot_file, eff_ids);
FREE(local_copy);
/* continue translating rules */
}
break;
#endif /* ACCESS_AUTH */
case HT_Pass: /* Authorised */
if (!r->equiv) {
if (TRACE) fprintf(stderr, "HTRule: Pass `%s'\n", current);
return current;
}
/* Else fall through ...to map and pass */
case HT_Map:
if (*p == *q) { /* End of both strings, no wildcard */
if (TRACE) fprintf(stderr,
"For `%s' using `%s'\n", current, r->equiv);
StrAllocCopy(current, r->equiv); /* use entire translation */
} else {
char * ins = strchr(r->equiv, '*'); /* Insertion point */
if (ins) { /* Consistent rule!!! */
char * temp = (char *)malloc(
strlen(r->equiv)-1 + m + 1);
if (temp==NULL)
outofmem(__FILE__, "HTTranslate"); /* NT & AS */
strncpy(temp, r->equiv, ins-r->equiv);
/* Note: temp may be unterminated now! */
strncpy(temp+(ins-r->equiv), q, m); /* Matched bit */
strcpy (temp+(ins-r->equiv)+m, ins+1); /* Last bit */
if (TRACE) fprintf(stderr, "For `%s' using `%s'\n",
current, temp);
FREE(current);
current = temp; /* Use this */
} else { /* No insertion point */
char * temp = (char *)malloc(strlen(r->equiv)+1);
if (temp==NULL)
outofmem(__FILE__, "HTTranslate"); /* NT & AS */
strcpy(temp, r->equiv);
if (TRACE) fprintf(stderr, "For `%s' using `%s'\n",
current, temp);
FREE(current);
current = temp; /* Use this */
} /* If no insertion point exists */
}
if (r->op == HT_Pass) {
if (TRACE) fprintf(stderr, "HTRule: ...and pass `%s'\n",
current);
return current;
}
break;
case HT_Invalid:
case HT_Fail: /* Unauthorised */
if (TRACE) fprintf(stderr, "HTRule: *** FAIL `%s'\n",
current);
return (char *)0;
} /* if tail matches ... switch operation */
} /* loop over rules */
return current;
}
/* Load one line of configuration
** ------------------------------
**
** Call this, for example, to load a X resource with config info.
**
** returns 0 OK, < 0 syntax error.
*/
PUBLIC int HTSetConfiguration ARGS1(CONST char *, config)
{
HTRuleOp op;
char * line = NULL;
char * pointer = line;
char *word1, *word2, *word3;
float quality, secs, secs_per_byte;
int maxbytes;
int status;
StrAllocCopy(line, config);
{
char * p = strchr(line, '#'); /* Chop off comments */
if (p) *p = 0;
}
pointer = line;
word1 = HTNextField(&pointer);
if (!word1) {
FREE(line);
return 0;
} ; /* Comment only or blank */
word2 = HTNextField(&pointer);
if (0==strcasecomp(word1, "defprot") ||
0==strcasecomp(word1, "protect"))
word3 = pointer; /* The rest of the line to be parsed by AA module */
else
word3 = HTNextField(&pointer); /* Just the next word */
if (!word2) {
fprintf(stderr, "HTRule: Insufficient operands: %s\n", line);
FREE(line);
return -2; /*syntax error */
}
if (0==strcasecomp(word1, "suffix")) {
char * encoding = HTNextField(&pointer);
if (pointer) status = sscanf(pointer, "%f", &quality);
else status = 0;
HTSetSuffix(word2, word3,
encoding ? encoding : "binary",
status >= 1? quality : 1.0);
} else if (0==strcasecomp(word1, "presentation")) {
if (pointer) status = sscanf(pointer, "%f%f%f%d",
&quality, &secs, &secs_per_byte, &maxbytes);
else status = 0;
HTSetPresentation(word2, word3,
status >= 1? quality : 1.0,
status >= 2 ? secs : 0.0,
status >= 3 ? secs_per_byte : 0.0,
status >= 4 ? maxbytes : 0 );
} else if (0==strncasecomp(word1, "htbin", 5) ||
0==strncasecomp(word1, "bindir", 6)) {
StrAllocCopy(HTBinDir, word2); /* Physical /htbin location */
} else if (0==strncasecomp(word1, "search", 6)) {
StrAllocCopy(HTSearchScript, word2); /* Search script name */
} else {
op = 0==strcasecomp(word1, "map") ? HT_Map
: 0==strcasecomp(word1, "pass") ? HT_Pass
: 0==strcasecomp(word1, "fail") ? HT_Fail
: 0==strcasecomp(word1, "defprot") ? HT_DefProt
: 0==strcasecomp(word1, "protect") ? HT_Protect
: HT_Invalid;
if (op==HT_Invalid) {
fprintf(stderr, "HTRule: Bad rule `%s'\n", config);
} else {
HTAddRule(op, word2, word3);
}
}
FREE(line);
return 0;
}
/* Load the rules from a file HTLoadRules()
** --------------------------
**
** On entry,
** Rules can be in any state
** On exit,
** Any existing rules will have been kept.
** Any new rules will have been loaded.
** Returns 0 if no error, 0 if error!
**
** Bugs:
** The strings may not contain spaces.
*/
int HTLoadRules ARGS1(CONST char *, filename)
{
FILE * fp = fopen(filename, "r");
char line[LINE_LENGTH+1];
if (!fp) {
if (TRACE) fprintf(stderr,
"HTRules: Can't open rules file %s\n", filename);
return -1; /* File open error */
}
for(;;) {
if (!fgets(line, LINE_LENGTH+1, fp)) break; /* EOF or error */
(void) HTSetConfiguration(line);
}
fclose(fp);
return 0; /* No error or syntax errors ignored */
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.