1 files changed, 73 insertions, 0 deletions
diff --git a/sunrpc/rpc_gethostbyname.c b/sunrpc/rpc_gethostbyname.c
new file mode 100644
index 0000000000..a2ee960482
--- /dev/null
+++ b/sunrpc/rpc_gethostbyname.c
@@ -0,0 +1,73 @@
+/* IPv4-only variant of gethostbyname.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <netdb.h>
+#include <rpc/rpc.h>
+#include <scratch_buffer.h>
+#include <string.h>
+
+int
+__libc_rpc_gethostbyname (const char *host, struct sockaddr_in *addr)
+{
+  struct hostent hostbuf;
+  struct hostent *hp = NULL;
+  int herr;
+  struct scratch_buffer tmpbuf;
+  scratch_buffer_init (&tmpbuf);
+
+  while (__gethostbyname2_r (host, AF_INET,
+                             &hostbuf, tmpbuf.data, tmpbuf.length, &hp,
+                             &herr) != 0
+         || hp == NULL)
+    if (herr != NETDB_INTERNAL || errno != ERANGE)
+      {
+        struct rpc_createerr *ce = &get_rpc_createerr ();
+        ce->cf_stat = RPC_UNKNOWNHOST;
+        scratch_buffer_free (&tmpbuf);
+        return -1;
+      }
+    else
+      {
+        if (!scratch_buffer_grow (&tmpbuf))
+          {
+            /* If memory allocation failed, allocating the RPC error
+               structure might could as well, so this could lead to a
+               crash.  */
+            struct rpc_createerr *ce = &get_rpc_createerr ();
+            ce->cf_stat = RPC_SYSTEMERROR;
+            ce->cf_error.re_errno = ENOMEM;
+            return -1;
+          }
+      }
+
+  if (hp->h_addrtype != AF_INET || hp->h_length != sizeof (addr->sin_addr))
+    {
+      struct rpc_createerr *ce = &get_rpc_createerr ();
+      ce->cf_stat = RPC_SYSTEMERROR;
+      ce->cf_error.re_errno = EAFNOSUPPORT;
+      scratch_buffer_free (&tmpbuf);
+      return -1;
+    }
+
+  addr->sin_family = AF_INET;
+  addr->sin_port = htons (0);
+  memcpy (&addr->sin_addr, hp->h_addr, sizeof (addr->sin_addr));
+  scratch_buffer_free (&tmpbuf);
+  return 0;
+}