dnl Check for netinet/in.h
AC_CHECK_HEADERS([netinet/in.h])
+# check for arpa/inet.h
+dnl Check for arpa/inet.h
+AC_CHECK_HEADERS([arpa/inet.h])
+
# check for SA_LEN
dnl Check if sockaddr data structure includes a "sa_len"
AC_CHECK_MEMBER([struct sockaddr.sa_len],