Pantyhose-X/tinyproxy
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Added code to handle the "FilterDefaultDeny" directive. The filter_set_default_policy() function is used to select the default policy (either default allow or default deny) for the filtering code. Also, the two filtering functions now support the policy code.

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This commit is contained in:
Robert James Kaes 2002-06-07 18:36:22 +00:00
parent ff56e32e8e
commit 7e1de2012c
2 changed files with 50 additions and 14 deletions
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55
src/filter.c
View File

@ -1,4 +1,4 @@
/* $Id: filter.c,v 1.12 2002-06-06 20:30:04 rjkaes Exp $
/* $Id: filter.c,v 1.13 2002-06-07 18:36:22 rjkaes Exp $
*
* Copyright (c) 1999 George Talusan (gstalusan@uwaterloo.ca)
* Copyright (c) 2002 James E. Flemer (jflemer@acm.jhu.edu)
@ -37,6 +37,7 @@ struct filter_list {
static struct filter_list *fl = NULL;
static int already_init = 0;
static filter_policy_t default_policy = FILTER_DEFAULT_ALLOW;
/*
* Initializes a linked list of strings containing hosts/urls to be filtered
@ -129,7 +130,7 @@ filter_destroy(void)
}
}
/* returns 0 if host is not an element of filter list, non-zero otherwise */
/* Return 0 to allow, non-zero to block */
int
filter_domain(const char *host)
{
@ -137,31 +138,59 @@ filter_domain(const char *host)
int result;
if (!fl || !already_init)
return (0);
goto COMMON_EXIT;
result = 0;
for (p = fl; p; p = p->next) {
result = !regexec(p->cpat, host, (size_t) 0, (regmatch_t *) 0, 0);
result = regexec(p->cpat, host, (size_t) 0, (regmatch_t *) 0, 0);
if (result)
break;
if (result == 0) {
if (default_policy == FILTER_DEFAULT_ALLOW)
return 1;
else
return 0;
}
}
return (result);
COMMON_EXIT:
if (default_policy == FILTER_DEFAULT_ALLOW)
return 0;
else
return 1;
}
/* returns 0 if url is not an element of filter list, non-zero otherwise */
/* returns 0 to allow, non-zero to block */
int
filter_url(const char *url)
{
struct filter_list *p;
int result;
if (!fl || !already_init)
return (0);
goto COMMON_EXIT;
for (p = fl; p; p = p->next) {
if (!regexec(p->cpat, url, (size_t) 0, (regmatch_t *) 0, 0)) {
return 1;
result = regexec(p->cpat, url, (size_t) 0, (regmatch_t *) 0, 0);
if (result == 0) {
if (default_policy == FILTER_DEFAULT_ALLOW)
return 1;
else
return 0;
}
}
return 0;
COMMON_EXIT:
if (default_policy == FILTER_DEFAULT_ALLOW)
return 0;
else
return 1;
}
/*
* Set the default filtering policy
*/
void
filter_set_default_policy(filter_policy_t policy)
{
default_policy = policy;
}

9
src/filter.h
View File

@ -1,4 +1,4 @@
/* $Id: filter.h,v 1.4 2002-05-27 01:56:22 rjkaes Exp $
/* $Id: filter.h,v 1.5 2002-06-07 18:36:21 rjkaes Exp $
*
* See 'filter.c' for a detailed description.
*
@ -18,9 +18,16 @@
#ifndef _TINYPROXY_FILTER_H_
#define _TINYPROXY_FILTER_H_
typedef enum {
FILTER_DEFAULT_ALLOW,
FILTER_DEFAULT_DENY,
} filter_policy_t;
extern void filter_init(void);
extern void filter_destroy(void);
extern int filter_domain(const char *host);
extern int filter_url(const char *url);
extern void filter_set_default_policy(filter_policy_t policy);
#endif