Reject SOCKS requests for "localhost" or ".local"

Sending them on is futile, since we will be told "127.0.0.1" and then
think we've been lied to.  Partial fix for 2822.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/common/address.c b/src/common/address.c
index 676c485897..e379464ebf 100644
--- a/src/common/address.c
+++ b/src/common/address.c
@@ -1682,3 +1682,12 @@ get_interface_address(int severity, uint32_t *addr)
   return r;
 }
 
+/** Return true if we can tell that <b>name</b> is a canonical name for the
+ * loopback address. */
+int
+tor_addr_hostname_is_local(const char *name)
+{
+  return !strcasecmp(name, "localhost") ||
+    !strcasecmp(name, "local") ||
+    !strcasecmpend(name, ".local");
+}