net/wol.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * wol - Wake-on-LAN
   4  *
   5  * Supports both Wake-on-LAN packet types:
   6  * - EtherType 0x0842 packets
   7  * - UDP packets on ports 0, 7 and 9.
   8  *
   9  * Copyright 2018 Lothar Felten, lothar.felten@gmail.com
  10  */
  11
  12 #if defined(CONFIG_CMD_WOL)
  13
  14 #ifndef __WOL_H__
  15 #define __WOL_H__
  16
  17 #include <net.h>
  18
  19 /**********************************************************************/
  20
  21 #define WOL_SYNC_BYTE                   0xFF
  22 #define WOL_SYNC_COUNT                  6
  23 #define WOL_MAC_REPETITIONS             16
  24 #define WOL_DEFAULT_TIMEOUT             5000
  25 #define WOL_PASSWORD_4B                 4
  26 #define WOL_PASSWORD_6B                 6
  27
  28 /*
  29  * Wake-on-LAN header
  30  */
  31 struct wol_hdr {
  32         u8      wol_sync[WOL_SYNC_COUNT];                       /* sync bytes */
  33         u8      wol_dest[WOL_MAC_REPETITIONS * ARP_HLEN];       /* 16x MAC */
  34         u8      wol_passwd[0];                                  /* optional */
  35 };
  36
  37 /*
  38  * Initialize wol (beginning of netloop)
  39  */
  40 void wol_start(void);
  41
  42 /*
  43  * Check incoming Wake-on-LAN packet for:
  44  * - sync bytes
  45  * - sixteen copies of the target MAC address
  46  *
  47  * Optionally store the four or six byte password in the environment
  48  * variable "wolpassword"
  49  *
  50  * @param ip IP header in the packet
  51  * @param len Packet length
  52  */
  53 void wol_receive(struct ip_udp_hdr *ip, unsigned int len);
  54
  55 /*
  56  * Set the timeout for the reception of a Wake-on-LAN packet
  57  *
  58  * @param timeout in milliseconds
  59  */
  60 void wol_set_timeout(ulong timeout);
  61
  62 /**********************************************************************/
  63
  64 #endif /* __WOL_H__ */
  65 #endif