Import Upstream version 0.88

1 files changed, 100 insertions, 0 deletions

diff --git a/rules.c b/rules.c
new file mode 100644
index 0000000..1840360
--- /dev/null
+++ b/rules.c
@@ -0,0 +1,100 @@
+#include "alloc.h"
+#include "stralloc.h"
+#include "open.h"
+#include "cdb.h"
+#include "rules.h"
+
+stralloc rules_name = {0};
+
+static struct cdb c;
+
+static int dorule(void (*callback)(char *,unsigned int))
+{
+  char *data;
+  unsigned int datalen;
+
+  switch(cdb_find(&c,rules_name.s,rules_name.len)) {
+    case -1: return -1;
+    case 0: return 0;
+  }
+
+  datalen = cdb_datalen(&c);
+  data = alloc(datalen);
+  if (!data) return -1;
+  if (cdb_read(&c,data,datalen,cdb_datapos(&c)) == -1) {
+    alloc_free(data);
+    return -1;
+  }
+
+  callback(data,datalen);
+  alloc_free(data);
+  return 1;
+}
+
+static int doit(void (*callback)(char *,unsigned int),char *ip,char *host,char *info)
+{
+  int r;
+
+  if (info) {
+    if (!stralloc_copys(&rules_name,info)) return -1;
+    if (!stralloc_cats(&rules_name,"@")) return -1;
+    if (!stralloc_cats(&rules_name,ip)) return -1;
+    r = dorule(callback);
+    if (r) return r;
+
+    if (host) {
+      if (!stralloc_copys(&rules_name,info)) return -1;
+      if (!stralloc_cats(&rules_name,"@=")) return -1;
+      if (!stralloc_cats(&rules_name,host)) return -1;
+      r = dorule(callback);
+      if (r) return r;
+    }
+  }
+
+  if (!stralloc_copys(&rules_name,ip)) return -1;
+  r = dorule(callback);
+  if (r) return r;
+
+  if (host) {
+    if (!stralloc_copys(&rules_name,"=")) return -1;
+    if (!stralloc_cats(&rules_name,host)) return -1;
+    r = dorule(callback);
+    if (r) return r;
+  }
+
+  if (!stralloc_copys(&rules_name,ip)) return -1;
+  while (rules_name.len > 0) {
+    if (ip[rules_name.len - 1] == '.') {
+      r = dorule(callback);
+      if (r) return r;
+    }
+    --rules_name.len;
+  }
+
+  if (host) {
+    while (*host) {
+      if (*host == '.') {
+        if (!stralloc_copys(&rules_name,"=")) return -1;
+        if (!stralloc_cats(&rules_name,host)) return -1;
+	r = dorule(callback);
+	if (r) return r;
+      }
+      ++host;
+    }
+    if (!stralloc_copys(&rules_name,"=")) return -1;
+    r = dorule(callback);
+    if (r) return r;
+  }
+
+  rules_name.len = 0;
+  return dorule(callback);
+}
+
+int rules(void (*callback)(char *,unsigned int),int fd,char *ip,char *host,char *info)
+{
+  int r;
+  cdb_init(&c,fd);
+  r = doit(callback,ip,host,info);
+  cdb_free(&c);
+  return r;
+}