net: dhcp: Allow "MAY_FAIL" to still try each adapter

This change allows the "MAY_FAIL" DHCP option to still attempt to
contact a DHCP server on each adapter and only give up once each
adapter has failed once.  To get the existing behavior, set the
already-existing ethrotate=no variable.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Cc: Keng Soon Cheah <keng.soon.cheah@ni.com>
Cc: Chen Yee Chew <chen.yee.chew@ni.com>

diff --git a/net/bootp.c b/net/bootp.c
index 59bb209..efa9599 100644 (file)
--- a/net/bootp.c
+++ b/net/bootp.c
@@ -386,12 +386,19 @@ static void bootp_timeout_handler(void)
 
        if (time_taken >= time_taken_max) {
 #ifdef CONFIG_BOOTP_MAY_FAIL
-               puts("\nRetry time exceeded\n");
-               net_set_state(NETLOOP_FAIL);
-#else
-               puts("\nRetry time exceeded; starting again\n");
-               net_start_again();
+               char *ethrotate;
+
+               ethrotate = env_get("ethrotate");
+               if ((ethrotate && strcmp(ethrotate, "no") == 0) ||
+                   net_restart_wrap) {
+                       puts("\nRetry time exceeded\n");
+                       net_set_state(NETLOOP_FAIL);
+               } else
 #endif
+               {
+                       puts("\nRetry time exceeded; starting again\n");
+                       net_start_again();
+               }
        } else {
                bootp_timeout *= 2;
                if (bootp_timeout > 2000)