From d8970dae276377a0beff1c3e9d8b6f805ecf5cd5 Mon Sep 17 00:00:00 2001 From: Lothar Felten Date: Fri, 22 Jun 2018 22:29:54 +0200 Subject: net: Add new wol command - Wake on LAN Add a new command 'wol': Wait for an incoming Wake-on-LAN packet or time out if no WoL packed is received. If the WoL packet contains a password, it is saved in the environment variable 'wolpassword' using the etherwake format (dot or colon separated decimals). Intended use case: a networked device should boot an alternate image. It's attached to a network on a client site, modifying the DHCP server configuration or setup of a tftp server is not allowed. After power on the device waits a few seconds for a WoL packet. If a packet is received, the device boots the alternate image. Otherwise it boots the default image. This method is a simple way to interact with a system via network even if only the MAC address is known. Tools to send WoL packets are available on all common platforms. Some Ethernet drivers seem to pad the incoming packet. The additional padding bytes might be recognized as Wake-on-LAN password bytes. By default enabled in pengwyn_defconfig. Signed-off-by: Lothar Felten Acked-by: Joe Hershberger --- net/Makefile | 1 + 1 file changed, 1 insertion(+) (limited to 'net/Makefile') diff --git a/net/Makefile b/net/Makefile index 0746687..ce36362 100644 --- a/net/Makefile +++ b/net/Makefile @@ -24,6 +24,7 @@ obj-$(CONFIG_CMD_RARP) += rarp.o obj-$(CONFIG_CMD_SNTP) += sntp.o obj-$(CONFIG_CMD_TFTPBOOT) += tftp.o obj-$(CONFIG_UDP_FUNCTION_FASTBOOT) += fastboot.o +obj-$(CONFIG_CMD_WOL) += wol.o # Disable this warning as it is triggered by: # sprintf(buf, index ? "foo%d" : "foo", index) -- cgit v1.1