Tom Rini
6 years ago
commit
d4c7a9348f
@ -0,0 +1,33 @@ |
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2018 |
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* Lothar Felte, lothar.felten@gmail.com |
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*/ |
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/*
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* Wake-on-LAN support |
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*/ |
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#include <common.h> |
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#include <command.h> |
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#include <net.h> |
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#if defined(CONFIG_CMD_WOL) |
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void wol_set_timeout(ulong); |
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int do_wol(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
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{ |
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/* Validate arguments */ |
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if (argc < 2) |
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return CMD_RET_USAGE; |
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wol_set_timeout(simple_strtol(argv[1], NULL, 10) * 1000); |
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if (net_loop(WOL) < 0) |
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return CMD_RET_FAILURE; |
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return CMD_RET_SUCCESS; |
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} |
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U_BOOT_CMD( |
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wol, 2, 1, do_wol, |
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"wait for an incoming wake-on-lan packet", |
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"Timeout" |
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); |
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#endif |
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@ -0,0 +1,96 @@ |
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2018 Lothar Felten, lothar.felten@gmail.com |
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*/ |
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#include <common.h> |
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#include <command.h> |
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#include <net.h> |
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#include <environment.h> |
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#include "wol.h" |
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static ulong wol_timeout = WOL_DEFAULT_TIMEOUT; |
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/*
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* Check incoming Wake-on-LAN packet for: |
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* - sync bytes |
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* - sixteen copies of the target MAC address |
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* |
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* @param wol Wake-on-LAN packet |
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* @param len Packet length |
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*/ |
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static int wol_check_magic(struct wol_hdr *wol, unsigned int len) |
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{ |
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int i; |
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if (len < sizeof(struct wol_hdr)) |
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return 0; |
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for (i = 0; i < WOL_SYNC_COUNT; i++) |
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if (wol->wol_sync[i] != WOL_SYNC_BYTE) |
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return 0; |
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for (i = 0; i < WOL_MAC_REPETITIONS; i++) |
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if (memcmp(&wol->wol_dest[i * ARP_HLEN], |
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net_ethaddr, ARP_HLEN) != 0) |
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return 0; |
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return 1; |
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} |
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void wol_receive(struct ip_udp_hdr *ip, unsigned int len) |
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{ |
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struct wol_hdr *wol; |
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wol = (struct wol_hdr *)ip; |
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if (!wol_check_magic(wol, len)) |
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return; |
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/* save the optional password using the ether-wake formats */ |
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/* don't check for exact length, the packet might have padding */ |
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if (len >= (sizeof(struct wol_hdr) + WOL_PASSWORD_6B)) { |
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eth_env_set_enetaddr("wolpassword", wol->wol_passwd); |
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} else if (len >= (sizeof(struct wol_hdr) + WOL_PASSWORD_4B)) { |
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char buffer[16]; |
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struct in_addr *ip = (struct in_addr *)(wol->wol_passwd); |
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ip_to_string(*ip, buffer); |
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env_set("wolpassword", buffer); |
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} |
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net_set_state(NETLOOP_SUCCESS); |
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} |
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static void wol_udp_handler(uchar *pkt, unsigned int dest, struct in_addr sip, |
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unsigned int src, unsigned int len) |
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{ |
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struct wol_hdr *wol; |
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wol = (struct wol_hdr *)pkt; |
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/* UDP destination port must be 0, 7 or 9 */ |
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if (dest != 0 && dest != 7 && dest != 9) |
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return; |
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if (!wol_check_magic(wol, len)) |
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return; |
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net_set_state(NETLOOP_SUCCESS); |
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} |
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void wol_set_timeout(ulong timeout) |
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{ |
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wol_timeout = timeout; |
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} |
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static void wol_timeout_handler(void) |
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{ |
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eth_halt(); |
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net_set_state(NETLOOP_FAIL); |
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} |
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void wol_start(void) |
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{ |
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net_set_timeout_handler(wol_timeout, wol_timeout_handler); |
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net_set_udp_handler(wol_udp_handler); |
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} |
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@ -0,0 +1,65 @@ |
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/* SPDX-License-Identifier: GPL-2.0+ */ |
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/*
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* wol - Wake-on-LAN |
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* |
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* Supports both Wake-on-LAN packet types: |
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* - EtherType 0x0842 packets |
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* - UDP packets on ports 0, 7 and 9. |
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* |
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* Copyright 2018 Lothar Felten, lothar.felten@gmail.com |
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*/ |
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#if defined(CONFIG_CMD_WOL) |
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#ifndef __WOL_H__ |
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#define __WOL_H__ |
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#include <net.h> |
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/**********************************************************************/ |
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#define WOL_SYNC_BYTE 0xFF |
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#define WOL_SYNC_COUNT 6 |
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#define WOL_MAC_REPETITIONS 16 |
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#define WOL_DEFAULT_TIMEOUT 5000 |
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#define WOL_PASSWORD_4B 4 |
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#define WOL_PASSWORD_6B 6 |
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/*
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* Wake-on-LAN header |
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*/ |
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struct wol_hdr { |
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u8 wol_sync[WOL_SYNC_COUNT]; /* sync bytes */ |
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u8 wol_dest[WOL_MAC_REPETITIONS * ARP_HLEN]; /* 16x MAC */ |
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u8 wol_passwd[0]; /* optional */ |
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}; |
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/*
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* Initialize wol (beginning of netloop) |
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*/ |
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void wol_start(void); |
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/*
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* Check incoming Wake-on-LAN packet for: |
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* - sync bytes |
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* - sixteen copies of the target MAC address |
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* |
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* Optionally store the four or six byte password in the environment |
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* variable "wolpassword" |
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* |
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* @param ip IP header in the packet |
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* @param len Packet length |
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*/ |
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void wol_receive(struct ip_udp_hdr *ip, unsigned int len); |
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/*
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* Set the timeout for the reception of a Wake-on-LAN packet |
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* |
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* @param timeout in milliseconds |
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*/ |
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void wol_set_timeout(ulong timeout); |
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/**********************************************************************/ |
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#endif /* __WOL_H__ */ |
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#endif |
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