From f4f1ddccd79fd90120c9ad1c13fbcbef03983054 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Thu, 7 Nov 2019 14:08:03 -0600
Subject: [PATCH] netutils/netlib/netlib_getarptab.c:  Per an old Linux Journal
 article, the nl_pid fild of struct sockaddr_nl should be set to the PID of
 the task that created the Netlink socket.  Also fixes a warning.

---
 netutils/netlib/netlib_getarptab.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/netutils/netlib/netlib_getarptab.c b/netutils/netlib/netlib_getarptab.c
index 79d076335..5ac3da1a8 100644
--- a/netutils/netlib/netlib_getarptab.c
+++ b/netutils/netlib/netlib_getarptab.c
@@ -41,6 +41,7 @@
 
 #include <sys/socket.h>
 #include <stdlib.h>
+#include <unistd.h>
 #include <string.h>
 #include <errno.h>
 #include <errno.h>
@@ -135,11 +136,13 @@ ssize_t netlib_get_arptable(FAR struct arp_entry_s *arptab, unsigned int nentrie
 
   /* Bind the socket so that we can use send() and receive() */
 
-  memset(&addr, 0, sizeof(struct sockaddr_nl));
   addr.nl_family = AF_NETLINK;
+  addr.nl_pad    = 0;
+  addr.nl_pid    = getpid();
   addr.nl_groups = RTM_GETNEIGH;
 
-  ret = bind(fd, &addr, sizeof( struct sockaddr_nl));
+  ret = bind(fd, (FAR const struct sockaddr *)&addr,
+             sizeof( struct sockaddr_nl));
   if (fd < 0)
     {
       int errcode = errno;