[96b02b5] | 1 | /* |
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| 2 | * Copyright (C) 2020 Soleta Networks <info@soleta.eu> |
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| 3 | * |
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| 4 | * This program is free software: you can redistribute it and/or modify it under |
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| 5 | * the terms of the GNU Affero General Public License as published by the |
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| 6 | * Free Software Foundation, version 3. |
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| 7 | */ |
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| 8 | #include <sys/types.h> |
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| 9 | #include <ifaddrs.h> |
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| 10 | #include <string.h> |
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| 11 | #include <netinet/in.h> |
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| 12 | #include <sys/socket.h> |
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| 13 | #include <syslog.h> |
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| 14 | #include <stddef.h> |
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| 15 | #include <sys/types.h> |
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| 16 | #include <sys/stat.h> |
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| 17 | #include <sys/types.h> |
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| 18 | #include <sys/socket.h> |
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| 19 | #include <fcntl.h> |
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| 20 | #include "wol.h" |
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[fe1ce97] | 21 | #include "cfg.h" |
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[96b02b5] | 22 | #include "ogAdmServer.h" |
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| 23 | |
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[060e31c] | 24 | int wol_socket_open(void) |
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| 25 | { |
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| 26 | unsigned int on = 1; |
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| 27 | int ret, s; |
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| 28 | |
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| 29 | s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); |
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| 30 | if (s < 0) { |
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| 31 | syslog(LOG_ERR, "cannot create socket for magic packet\n"); |
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| 32 | return -1; |
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| 33 | } |
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| 34 | ret = setsockopt(s, SOL_SOCKET, SO_BROADCAST, (unsigned int *) &on, |
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| 35 | sizeof(on)); |
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| 36 | if (ret < 0) { |
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| 37 | syslog(LOG_ERR, "cannot set broadcast socket\n"); |
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| 38 | return -1; |
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| 39 | } |
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| 40 | |
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| 41 | return s; |
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| 42 | } |
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| 43 | |
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[96b02b5] | 44 | bool wake_up_send(int sd, struct sockaddr_in *client, |
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| 45 | const struct wol_msg *msg, const struct in_addr *addr) |
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| 46 | { |
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| 47 | int ret; |
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| 48 | |
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| 49 | client->sin_addr.s_addr = addr->s_addr; |
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| 50 | |
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| 51 | ret = sendto(sd, msg, sizeof(*msg), 0, |
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| 52 | (struct sockaddr *)client, sizeof(*client)); |
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| 53 | if (ret < 0) { |
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| 54 | syslog(LOG_ERR, "failed to send wol\n"); |
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| 55 | return false; |
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| 56 | } |
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| 57 | |
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| 58 | return true; |
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| 59 | } |
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| 60 | |
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| 61 | bool wake_up_broadcast(int sd, struct sockaddr_in *client, |
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| 62 | const struct wol_msg *msg) |
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| 63 | { |
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| 64 | struct sockaddr_in *broadcast_addr, addr = {}; |
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| 65 | struct ifaddrs *ifaddr, *ifa; |
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| 66 | |
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| 67 | if (getifaddrs(&ifaddr) < 0) { |
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| 68 | syslog(LOG_ERR, "cannot get list of addresses\n"); |
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| 69 | return false; |
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| 70 | } |
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| 71 | |
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| 72 | addr.sin_addr.s_addr = htonl(INADDR_BROADCAST); |
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| 73 | |
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| 74 | for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) { |
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| 75 | if (ifa->ifa_addr == NULL || |
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| 76 | ifa->ifa_addr->sa_family != AF_INET || |
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[fe1ce97] | 77 | strcmp(ifa->ifa_name, ogconfig.wol.interface) != 0) |
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[96b02b5] | 78 | continue; |
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| 79 | |
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| 80 | broadcast_addr = |
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| 81 | (struct sockaddr_in *)ifa->ifa_ifu.ifu_broadaddr; |
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| 82 | addr.sin_addr.s_addr = broadcast_addr->sin_addr.s_addr; |
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| 83 | break; |
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| 84 | } |
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| 85 | freeifaddrs(ifaddr); |
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| 86 | |
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| 87 | return wake_up_send(sd, client, msg, &addr.sin_addr); |
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| 88 | } |
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