1 files changed, 57 insertions, 0 deletions
diff --git a/walldns.c b/walldns.c
new file mode 100644
index 0000000..3cdaa72
--- /dev/null
+++ b/walldns.c
@@ -0,0 +1,57 @@
+#include "byte.h"
+#include "dns.h"
+#include "dd.h"
+#include "response.h"
+
+const char *fatal = "walldns: fatal: ";
+const char *starting = "starting walldns\n";
+
+void initialize(void)
+{
+  ;
+}
+
+int respond(char *q,char qtype[2])
+{
+  int flaga;
+  int flagptr;
+  char ip[4];
+  int j;
+
+  flaga = byte_equal(qtype,2,DNS_T_A);
+  flagptr = byte_equal(qtype,2,DNS_T_PTR);
+  if (byte_equal(qtype,2,DNS_T_ANY)) flaga = flagptr = 1;
+
+  if (flaga || flagptr) {
+    if (dd(q,"",ip) == 4) {
+      if (flaga) {
+        if (!response_rstart(q,DNS_T_A,655360)) return 0;
+        if (!response_addbytes(ip,4)) return 0;
+        response_rfinish(RESPONSE_ANSWER);
+      }
+      return 1;
+    }
+    j = dd(q,"\7in-addr\4arpa",ip);
+    if (j >= 0) {
+      if (flaga && (j == 4)) {
+        if (!response_rstart(q,DNS_T_A,655360)) return 0;
+        if (!response_addbytes(ip + 3,1)) return 0;
+        if (!response_addbytes(ip + 2,1)) return 0;
+        if (!response_addbytes(ip + 1,1)) return 0;
+        if (!response_addbytes(ip + 0,1)) return 0;
+        response_rfinish(RESPONSE_ANSWER);
+      }
+      if (flagptr) {
+        if (!response_rstart(q,DNS_T_PTR,655360)) return 0;
+        if (!response_addname(q)) return 0;
+        response_rfinish(RESPONSE_ANSWER);
+      }
+      return 1;
+    }
+  }
+
+  response[2] &= ~4;
+  response[3] &= ~15;
+  response[3] |= 5;
+  return 1;
+}