From 2be9bfa40a66b71db4c29aff82527a086bbd3257 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Thu, 9 Jul 2015 09:14:42 -0600
Subject: [PATCH] gethostbyname() should succeed for matches on host name
 aliases as well

---
 libc/net/lib_gethostbynamer.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/libc/net/lib_gethostbynamer.c b/libc/net/lib_gethostbynamer.c
index c1fe9ca8ea..39dcec5c17 100644
--- a/libc/net/lib_gethostbynamer.c
+++ b/libc/net/lib_gethostbynamer.c
@@ -301,6 +301,9 @@ int gethostbyname_r(FAR const char *name, FAR struct hostent *host,
           /* We successfully read the entry */
 
           nvdbg("Comparing %s to %s\n", name, host->h_name);
+
+          /* Check for a host name match */
+
           if (strcmp(name, host->h_name) == 0)
             {
                /* We have a match */
@@ -308,6 +311,26 @@ int gethostbyname_r(FAR const char *name, FAR struct hostent *host,
                fclose(stream);
                return OK;
             }
+
+          /* For a match with any host alias */
+
+          if (host->h_aliases != NULL)
+            {
+              FAR char **alias;
+
+              for (alias = host->h_aliases; *alias != NULL; alias++)
+                {
+                  /* Check for a host alias match */
+
+                  if (strcmp(name, *alias) == 0)
+                    {
+                      /* We have a match */
+
+                      fclose(stream);
+                      return OK;
+                    }
+                }
+            }
         }
     }
   while (nread != 0);