projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| d8970dae LF |
1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* | |
| 3 | * Copyright 2018 Lothar Felten, [email protected] | |
| 4 | */ | |
| 5 | ||
| d8970dae | 6 | #include <command.h> |
| 9fb625ce | 7 | #include <env.h> |
| d8970dae | 8 | #include <net.h> |
| d8970dae LF |
9 | #include "wol.h" |
| 10 | ||
| 11 | static ulong wol_timeout = WOL_DEFAULT_TIMEOUT; | |
| 12 | ||
| 13 | /* | |
| 14 | * Check incoming Wake-on-LAN packet for: | |
| 15 | * - sync bytes | |
| 16 | * - sixteen copies of the target MAC address | |
| 17 | * | |
| 18 | * @param wol Wake-on-LAN packet | |
| 19 | * @param len Packet length | |
| 20 | */ | |
| 21 | static int wol_check_magic(struct wol_hdr *wol, unsigned int len) | |
| 22 | { | |
| 23 | int i; | |
| 24 | ||
| 25 | if (len < sizeof(struct wol_hdr)) | |
| 26 | return 0; | |
| 27 | ||
| 28 | for (i = 0; i < WOL_SYNC_COUNT; i++) | |
| 29 | if (wol->wol_sync[i] != WOL_SYNC_BYTE) | |
| 30 | return 0; | |
| 31 | ||
| 32 | for (i = 0; i < WOL_MAC_REPETITIONS; i++) | |
| 33 | if (memcmp(&wol->wol_dest[i * ARP_HLEN], | |
| 34 | net_ethaddr, ARP_HLEN) != 0) | |
| 35 | return 0; | |
| 36 | ||
| 37 | return 1; | |
| 38 | } | |
| 39 | ||
| 40 | void wol_receive(struct ip_udp_hdr *ip, unsigned int len) | |
| 41 | { | |
| 42 | struct wol_hdr *wol; | |
| 43 | ||
| 44 | wol = (struct wol_hdr *)ip; | |
| 45 | ||
| 46 | if (!wol_check_magic(wol, len)) | |
| 47 | return; | |
| 48 | ||
| 49 | /* save the optional password using the ether-wake formats */ | |
| 50 | /* don't check for exact length, the packet might have padding */ | |
| 51 | if (len >= (sizeof(struct wol_hdr) + WOL_PASSWORD_6B)) { | |
| 52 | eth_env_set_enetaddr("wolpassword", wol->wol_passwd); | |
| 53 | } else if (len >= (sizeof(struct wol_hdr) + WOL_PASSWORD_4B)) { | |
| 54 | char buffer[16]; | |
| 55 | struct in_addr *ip = (struct in_addr *)(wol->wol_passwd); | |
| 56 | ||
| 57 | ip_to_string(*ip, buffer); | |
| 58 | env_set("wolpassword", buffer); | |
| 59 | } | |
| 60 | net_set_state(NETLOOP_SUCCESS); | |
| 61 | } | |
| 62 | ||
| 63 | static void wol_udp_handler(uchar *pkt, unsigned int dest, struct in_addr sip, | |
| 64 | unsigned int src, unsigned int len) | |
| 65 | { | |
| 66 | struct wol_hdr *wol; | |
| 67 | ||
| 68 | wol = (struct wol_hdr *)pkt; | |
| 69 | ||
| 70 | /* UDP destination port must be 0, 7 or 9 */ | |
| 71 | if (dest != 0 && dest != 7 && dest != 9) | |
| 72 | return; | |
| 73 | ||
| 74 | if (!wol_check_magic(wol, len)) | |
| 75 | return; | |
| 76 | ||
| 77 | net_set_state(NETLOOP_SUCCESS); | |
| 78 | } | |
| 79 | ||
| 80 | void wol_set_timeout(ulong timeout) | |
| 81 | { | |
| 82 | wol_timeout = timeout; | |
| 83 | } | |
| 84 | ||
| 85 | static void wol_timeout_handler(void) | |
| 86 | { | |
| 87 | eth_halt(); | |
| 88 | net_set_state(NETLOOP_FAIL); | |
| 89 | } | |
| 90 | ||
| 91 | void wol_start(void) | |
| 92 | { | |
| 93 | net_set_timeout_handler(wol_timeout, wol_timeout_handler); | |
| 94 | net_set_udp_handler(wol_udp_handler); | |
| 95 | } |