This is useful if you want to look for a DHCP server, but try some
other settings if not available
Signed-off-by: Joe Hershberger <joe.hershber...@ni.com>
Cc: Joe Hershberger <joe.hershber...@gmail.com>
Cc: Wolfgang Denk <w...@denx.de>
---
README | 7 +++++++
net/bootp.c | 5 +++++
2 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/README b/README
index 9d713e8..352db7d 100644
--- a/README
+++ b/README
@@ -1573,10 +1573,17 @@ The following options need to be configured:
CONFIG_BOOTP_NTPSERVER
CONFIG_BOOTP_TIMEOFFSET
CONFIG_BOOTP_VENDOREX
+ CONFIG_BOOTP_CAN_FAIL
CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip
environment variable, not the BOOTP server.
+ CONFIG_BOOTP_CAN_FAIL - If the DHCP server is not found
+ after the configured retry count, the call will fail
+ instead of starting over. This can be used to fail over
+ to Link-local IP address configuration if the DHCP server
+ is not available.
+
CONFIG_BOOTP_DNS2 - If a DHCP client requests the DNS
serverip from a DHCP server, it is possible that more
than one DNS serverip is offered to the client.
diff --git a/net/bootp.c b/net/bootp.c
index 187b3a8..07f9d0e 100644
--- a/net/bootp.c
+++ b/net/bootp.c
@@ -327,8 +327,13 @@ static void
BootpTimeout(void)
{
if (BootpTry >= TIMEOUT_COUNT) {
+#ifdef CONFIG_BOOTP_CAN_FAIL
+ puts("\nRetry count exceeded\n");
+ NetSetState(NETLOOP_FAIL);
+#else
puts("\nRetry count exceeded; starting again\n");
NetStartAgain();
+#endif
} else {
NetSetTimeout(TIMEOUT, BootpTimeout);
BootpRequest();
--
1.6.0.2
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