summaryrefslogtreecommitdiffhomepage
path: root/src/filter.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/filter.c')
-rw-r--r--src/filter.c282
1 files changed, 143 insertions, 139 deletions
diff --git a/src/filter.c b/src/filter.c
index 161cc66..4f25c74 100644
--- a/src/filter.c
+++ b/src/filter.c
@@ -1,4 +1,4 @@
-/* $Id: filter.c,v 1.21 2005-07-12 17:39:43 rjkaes Exp $
+/* $Id: filter.c,v 1.22 2005-08-15 03:54:31 rjkaes Exp $
*
* Copyright (c) 1999 George Talusan (gstalusan@uwaterloo.ca)
* Copyright (c) 2002 James E. Flemer (jflemer@acm.jhu.edu)
@@ -30,9 +30,9 @@
static int err;
struct filter_list {
- struct filter_list *next;
- char *pat;
- regex_t *cpat;
+ struct filter_list *next;
+ char *pat;
+ regex_t *cpat;
};
static struct filter_list *fl = NULL;
@@ -45,158 +45,162 @@ static filter_policy_t default_policy = FILTER_DEFAULT_ALLOW;
void
filter_init(void)
{
- FILE *fd;
- struct filter_list *p;
- char buf[FILTER_BUFFER_LEN];
- char *s;
- int cflags;
-
- if (!fl && !already_init) {
- fd = fopen(config.filter, "r");
- if (fd) {
- p = NULL;
-
- cflags = REG_NEWLINE | REG_NOSUB;
- if (config.filter_extended)
- cflags |= REG_EXTENDED;
- if (!config.filter_casesensitive)
- cflags |= REG_ICASE;
-
- while (fgets(buf, FILTER_BUFFER_LEN, fd)) {
- /*
- * Remove any trailing white space and
- * comments.
- */
- s = buf;
- while (*s) {
- if (isspace((unsigned char)*s)) break;
- if (*s == '#') {
- /*
- * If the '#' char is preceeded by
- * an escape, it's not a comment
- * string.
- */
- if (s == buf || *(s - 1) != '\\')
- break;
- }
- ++s;
- }
- *s = '\0';
-
- /* skip leading whitespace */
- s = buf;
- while (*s && isspace((unsigned char)*s))
- s++;
-
- /* skip blank lines and comments */
- if (*s == '\0')
- continue;
-
- if (!p) /* head of list */
- fl = p =
- safecalloc(1,
- sizeof(struct
- filter_list));
- else { /* next entry */
- p->next =
- safecalloc(1,
- sizeof(struct
- filter_list));
- p = p->next;
- }
-
- p->pat = safestrdup(s);
- p->cpat = safemalloc(sizeof(regex_t));
- if ((err = regcomp(p->cpat, p->pat, cflags)) != 0) {
- fprintf(stderr, "Bad regex in %s: %s\n",
- config.filter, p->pat);
- exit(EX_DATAERR);
- }
- }
- if (ferror(fd)) {
- perror("fgets");
- exit(EX_DATAERR);
- }
- fclose(fd);
-
- already_init = 1;
- }
- }
+ FILE *fd;
+ struct filter_list *p;
+ char buf[FILTER_BUFFER_LEN];
+ char *s;
+ int cflags;
+
+ if (!fl && !already_init) {
+ fd = fopen(config.filter, "r");
+ if (fd) {
+ p = NULL;
+
+ cflags = REG_NEWLINE | REG_NOSUB;
+ if (config.filter_extended)
+ cflags |= REG_EXTENDED;
+ if (!config.filter_casesensitive)
+ cflags |= REG_ICASE;
+
+ while (fgets(buf, FILTER_BUFFER_LEN, fd)) {
+ /*
+ * Remove any trailing white space and
+ * comments.
+ */
+ s = buf;
+ while (*s) {
+ if (isspace((unsigned char)*s))
+ break;
+ if (*s == '#') {
+ /*
+ * If the '#' char is preceeded by
+ * an escape, it's not a comment
+ * string.
+ */
+ if (s == buf
+ || *(s - 1) != '\\')
+ break;
+ }
+ ++s;
+ }
+ *s = '\0';
+
+ /* skip leading whitespace */
+ s = buf;
+ while (*s && isspace((unsigned char)*s))
+ s++;
+
+ /* skip blank lines and comments */
+ if (*s == '\0')
+ continue;
+
+ if (!p) /* head of list */
+ fl = p =
+ safecalloc(1,
+ sizeof(struct
+ filter_list));
+ else { /* next entry */
+ p->next =
+ safecalloc(1,
+ sizeof(struct
+ filter_list));
+ p = p->next;
+ }
+
+ p->pat = safestrdup(s);
+ p->cpat = safemalloc(sizeof(regex_t));
+ if ((err =
+ regcomp(p->cpat, p->pat, cflags)) != 0) {
+ fprintf(stderr, "Bad regex in %s: %s\n",
+ config.filter, p->pat);
+ exit(EX_DATAERR);
+ }
+ }
+ if (ferror(fd)) {
+ perror("fgets");
+ exit(EX_DATAERR);
+ }
+ fclose(fd);
+
+ already_init = 1;
+ }
+ }
}
/* unlink the list */
void
filter_destroy(void)
{
- struct filter_list *p, *q;
-
- if (already_init) {
- for (p = q = fl; p; p = q) {
- regfree(p->cpat);
- safefree(p->cpat);
- safefree(p->pat);
- q = p->next;
- safefree(p);
- }
- fl = NULL;
- already_init = 0;
- }
+ struct filter_list *p, *q;
+
+ if (already_init) {
+ for (p = q = fl; p; p = q) {
+ regfree(p->cpat);
+ safefree(p->cpat);
+ safefree(p->pat);
+ q = p->next;
+ safefree(p);
+ }
+ fl = NULL;
+ already_init = 0;
+ }
}
/* Return 0 to allow, non-zero to block */
int
filter_domain(const char *host)
{
- struct filter_list *p;
- int result;
-
- if (!fl || !already_init)
- goto COMMON_EXIT;
-
- for (p = fl; p; p = p->next) {
- result = regexec(p->cpat, host, (size_t) 0, (regmatch_t *) 0, 0);
-
- if (result == 0) {
- if (default_policy == FILTER_DEFAULT_ALLOW)
- return 1;
- else
- return 0;
- }
- }
-
- COMMON_EXIT:
- if (default_policy == FILTER_DEFAULT_ALLOW)
- return 0;
- else
- return 1;
+ struct filter_list *p;
+ int result;
+
+ if (!fl || !already_init)
+ goto COMMON_EXIT;
+
+ for (p = fl; p; p = p->next) {
+ result =
+ regexec(p->cpat, host, (size_t) 0, (regmatch_t *) 0, 0);
+
+ if (result == 0) {
+ if (default_policy == FILTER_DEFAULT_ALLOW)
+ return 1;
+ else
+ return 0;
+ }
+ }
+
+ COMMON_EXIT:
+ if (default_policy == FILTER_DEFAULT_ALLOW)
+ return 0;
+ else
+ return 1;
}
/* returns 0 to allow, non-zero to block */
int
filter_url(const char *url)
{
- struct filter_list *p;
- int result;
-
- if (!fl || !already_init)
- goto COMMON_EXIT;
-
- for (p = fl; p; p = p->next) {
- 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;
- }
- }
-
- COMMON_EXIT:
- if (default_policy == FILTER_DEFAULT_ALLOW)
- return 0;
- else
- return 1;
+ struct filter_list *p;
+ int result;
+
+ if (!fl || !already_init)
+ goto COMMON_EXIT;
+
+ for (p = fl; p; p = p->next) {
+ 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;
+ }
+ }
+
+ COMMON_EXIT:
+ if (default_policy == FILTER_DEFAULT_ALLOW)
+ return 0;
+ else
+ return 1;
}
/*
@@ -205,5 +209,5 @@ filter_url(const char *url)
void
filter_set_default_policy(filter_policy_t policy)
{
- default_policy = policy;
+ default_policy = policy;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 20:52:22 +0000