@@ -1592,10 +1592,17 @@ The following options need to be configured:
CONFIG_BOOTP_NTPSERVER
CONFIG_BOOTP_TIMEOFFSET
CONFIG_BOOTP_VENDOREX
+ CONFIG_BOOTP_MAY_FAIL
CONFIG_BOOTP_SERVERIP - TFTP server will be the serverip
environment variable, not the BOOTP server.
+ CONFIG_BOOTP_MAY_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.
@@ -326,8 +326,13 @@ static void
BootpTimeout(void)
{
if (BootpTry >= TIMEOUT_COUNT) {
+#ifdef CONFIG_BOOTP_MAY_FAIL
+ puts("\nRetry count exceeded\n");
+ NetSetState(NETLOOP_FAIL);
+#else
puts("\nRetry count exceeded; starting again\n");
NetStartAgain();
+#endif
} else {
NetSetTimeout(TIMEOUT, BootpTimeout);
BootpRequest();
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.hershberger@ni.com> Cc: Joe Hershberger <joe.hershberger@gmail.com> --- Changes for v2: - Renamed to CONFIG_BOOTP_MAY_FAIL Changes for v3: - Rebased onto other changed patches README | 7 +++++++ net/bootp.c | 5 +++++ 2 files changed, 12 insertions(+), 0 deletions(-)