XML: Implemented a merger of element's contents.

[libucw.git] / lib / ipaccess.c

diff --git a/lib/ipaccess.c b/lib/ipaccess.c
index f1637c8554587a4b2b86af046ddfcc366773d873..5dd388ccd36ee0a5a68c71c47656650458629d13 100644 (file)
--- a/lib/ipaccess.c
+++ b/lib/ipaccess.c
@@ -1,7 +1,7 @@
 /*
  *     UCW Library -- IP address access lists
  *
- *     (c) 1997--2006 Martin Mares <mj@ucw.cz>
+ *     (c) 1997--2007 Martin Mares <mj@ucw.cz>
  *
  *     This software may be freely distributed and used according to the terms
  *     of the GNU Lesser General Public License.
@@ -9,7 +9,9 @@
 
 #include "lib/lib.h"
 #include "lib/clists.h"
-#include "lib/conf2.h"
+#include "lib/conf.h"
+#include "lib/getopt.h"
+#include "lib/fastbuf.h"
 #include "lib/ipaccess.h"
 
 #include <string.h>
@@ -17,49 +19,71 @@
 struct ipaccess_entry {
   cnode n;
   int allow;
-  u32 addr, mask;
+  struct ip_addrmask addr;
 };
 
-static byte *
-ipaccess_cf_ip(uns n UNUSED, byte **pars, struct ipaccess_entry *a)
+static char *
+addrmask_parser(char *c, void *ptr)
 {
-  byte *c = pars[0];
-  CF_JOURNAL_VAR(a->addr);
-  CF_JOURNAL_VAR(a->mask);
+  /*
+   * This is tricky: addrmasks will be compared by memcmp(), so we must ensure
+   * that even the padding between structure members is zeroed out.
+   */
+  struct ip_addrmask *am = ptr;
+  bzero(am, sizeof(*am));
 
-  byte *p = strchr(c, '/');
+  char *p = strchr(c, '/');
   if (p)
     *p++ = 0;
-  byte *err = cf_parse_ip(c, &a->addr);
+  char *err = cf_parse_ip(c, &am->addr);
   if (err)
     return err;
   if (p)
     {
       uns len;
       if (!cf_parse_int(p, &len) && len <= 32)
-       a->mask = ~(len == 32 ? 0 : ~0U >> len);
-      else if (cf_parse_ip(p, &a->mask))
+       am->mask = ~(len == 32 ? 0 : ~0U >> len);
+      else if (cf_parse_ip(p, &am->mask))
        return "Invalid prefix length or netmask";
     }
   else
-    a->mask = ~0U;
+    am->mask = ~0U;
   return NULL;
 }
 
+static void
+addrmask_dumper(struct fastbuf *fb, void *ptr)
+{
+  struct ip_addrmask *am = ptr;
+  bprintf(fb, "%08x/%08x ", am->addr, am->mask);
+}
+
+struct cf_user_type ip_addrmask_type = {
+  .size = sizeof(struct ip_addrmask),
+  .name = "ip_addrmask",
+  .parser = addrmask_parser,
+  .dumper = addrmask_dumper
+};
+
 struct cf_section ipaccess_cf = {
   CF_TYPE(struct ipaccess_entry),
   CF_ITEMS {
-    CF_LOOKUP("Mode", PTR_TO(struct ipaccess_entry, allow), ((char*[]) { "deny", "allow" })),
-    CF_PARSER("IP", NULL, ipaccess_cf_ip, 1),
+    CF_LOOKUP("Mode", PTR_TO(struct ipaccess_entry, allow), ((char*[]) { "deny", "allow", NULL })),
+    CF_USER("IP", PTR_TO(struct ipaccess_entry, addr), &ip_addrmask_type),
     CF_END
   }
 };
 
+int ip_addrmask_match(struct ip_addrmask *am, u32 ip)
+{
+  return !((ip ^ am->addr) & am->mask);
+}
+
 int
 ipaccess_check(clist *l, u32 ip)
 {
   CLIST_FOR_EACH(struct ipaccess_entry *, a, *l)
-    if (! ((ip ^ a->addr) & a->mask))
+    if (ip_addrmask_match(&a->addr, ip))
       return a->allow;
   return 0;
 }
@@ -80,13 +104,13 @@ static struct cf_section test_cf = {
 int main(int argc, char **argv)
 {
   cf_declare_section("T", &test_cf, 0);
-  if (cf_get_opt(argc, argv, CF_SHORT_OPTS, CF_NO_LONG_OPTS, NULL) != -1)
+  if (cf_getopt(argc, argv, CF_SHORT_OPTS, CF_NO_LONG_OPTS, NULL) != -1)
     die("Invalid arguments");
 
   byte buf[256];
   while (fgets(buf, sizeof(buf), stdin))
     {
-      byte *c = strchr(buf, '\n');
+      char *c = strchr(buf, '\n');
       if (c)
        *c = 0;
       u32 ip;