1 | /* |
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2 | * Copyright (C) 2020-2021 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; either version 3 of the License, or |
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7 | * (at your option) any later version. |
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8 | */ |
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9 | #include <sys/types.h> |
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10 | #include <ifaddrs.h> |
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11 | #include <string.h> |
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12 | #include <netinet/in.h> |
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13 | #include <sys/socket.h> |
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14 | #include <syslog.h> |
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15 | #include <stddef.h> |
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16 | #include <sys/types.h> |
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17 | #include <sys/stat.h> |
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18 | #include <sys/types.h> |
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19 | #include <sys/socket.h> |
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20 | #include <fcntl.h> |
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21 | #include "wol.h" |
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22 | #include "rest.h" |
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23 | #include "cfg.h" |
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24 | #include "ogAdmServer.h" |
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25 | |
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26 | int wol_socket_open(void) |
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27 | { |
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28 | unsigned int on = 1; |
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29 | int ret, s; |
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30 | |
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31 | s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); |
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32 | if (s < 0) { |
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33 | syslog(LOG_ERR, "cannot create socket for magic packet\n"); |
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34 | return -1; |
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35 | } |
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36 | ret = setsockopt(s, SOL_SOCKET, SO_BROADCAST, (unsigned int *) &on, |
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37 | sizeof(on)); |
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38 | if (ret < 0) { |
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39 | syslog(LOG_ERR, "cannot set broadcast socket\n"); |
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40 | return -1; |
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41 | } |
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42 | |
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43 | return s; |
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44 | } |
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45 | |
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46 | static int wake_up_send(int sd, struct sockaddr_in *client, |
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47 | const struct wol_msg *msg, const struct in_addr *addr) |
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48 | { |
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49 | int ret; |
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50 | |
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51 | client->sin_addr.s_addr = addr->s_addr; |
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52 | |
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53 | ret = sendto(sd, msg, sizeof(*msg), 0, |
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54 | (struct sockaddr *)client, sizeof(*client)); |
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55 | if (ret < 0) { |
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56 | syslog(LOG_ERR, "failed to send wol\n"); |
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57 | return -1; |
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58 | } |
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59 | |
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60 | return 0; |
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61 | } |
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62 | |
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63 | static int wake_up_broadcast(int sd, struct sockaddr_in *client, |
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64 | const struct wol_msg *msg) |
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65 | { |
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66 | struct sockaddr_in *broadcast_addr, addr = {}; |
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67 | struct ifaddrs *ifaddr, *ifa; |
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68 | |
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69 | if (getifaddrs(&ifaddr) < 0) { |
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70 | syslog(LOG_ERR, "cannot get list of addresses\n"); |
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71 | return -1; |
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72 | } |
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73 | |
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74 | addr.sin_addr.s_addr = htonl(INADDR_BROADCAST); |
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75 | |
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76 | for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) { |
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77 | if (ifa->ifa_addr == NULL || |
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78 | ifa->ifa_addr->sa_family != AF_INET || |
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79 | strcmp(ifa->ifa_name, ogconfig.wol.interface) != 0) |
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80 | continue; |
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81 | |
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82 | broadcast_addr = |
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83 | (struct sockaddr_in *)ifa->ifa_ifu.ifu_broadaddr; |
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84 | addr.sin_addr.s_addr = broadcast_addr->sin_addr.s_addr; |
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85 | break; |
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86 | } |
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87 | freeifaddrs(ifaddr); |
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88 | |
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89 | return wake_up_send(sd, client, msg, &addr.sin_addr); |
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90 | } |
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91 | |
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92 | enum wol_delivery_type { |
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93 | OG_WOL_BROADCAST = 1, |
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94 | OG_WOL_UNICAST = 2 |
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95 | }; |
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96 | |
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97 | int wake_up(int s, const struct in_addr *addr, const struct in_addr *netmask, |
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98 | const char *mac, uint32_t wol_delivery_type) |
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99 | { |
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100 | uint32_t mac_addr_u32[OG_WOL_MACADDR_LEN]; |
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101 | uint8_t mac_addr[OG_WOL_MACADDR_LEN]; |
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102 | struct sockaddr_in dest = { |
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103 | .sin_family = AF_INET, |
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104 | .sin_port = htons(OG_WOL_PORT), |
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105 | }; |
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106 | struct in_addr broadcast_addr; |
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107 | struct wol_msg msg = {}; |
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108 | int ret, i; |
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109 | |
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110 | memset(msg.wol_sequence_ff, 0xff, OG_WOL_SEQUENCE); |
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111 | sscanf(mac, "%02x%02x%02x%02x%02x%02x", |
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112 | &mac_addr_u32[0], &mac_addr_u32[1], &mac_addr_u32[2], |
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113 | &mac_addr_u32[3], &mac_addr_u32[4], &mac_addr_u32[5]); |
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114 | |
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115 | for (i = 0; i < OG_WOL_MACADDR_LEN; i++) |
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116 | mac_addr[i] = mac_addr_u32[i]; |
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117 | for (i = 0; i < OG_WOL_REPEAT; i++) |
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118 | memcpy(&msg.mac_addr[i][0], mac_addr, OG_WOL_MACADDR_LEN); |
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119 | |
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120 | switch (wol_delivery_type) { |
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121 | case OG_WOL_BROADCAST: |
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122 | ret = wake_up_broadcast(s, &dest, &msg); |
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123 | broadcast_addr.s_addr = addr->s_addr | ~netmask->s_addr; |
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124 | ret |= wake_up_send(s, &dest, &msg, &broadcast_addr); |
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125 | break; |
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126 | case OG_WOL_UNICAST: |
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127 | ret = wake_up_send(s, &dest, &msg, addr); |
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128 | break; |
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129 | default: |
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130 | syslog(LOG_ERR, "unknown wol type\n"); |
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131 | ret = -1; |
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132 | break; |
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133 | } |
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134 | |
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135 | return ret; |
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136 | } |
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137 | |
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138 | #define OG_WOL_CLIENT_TIMEOUT 60. |
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139 | |
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140 | static void og_client_wol_timer_cb(struct ev_loop *loop, ev_timer *timer, |
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141 | int events) |
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142 | { |
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143 | struct og_client_wol *cli_wol; |
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144 | |
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145 | cli_wol = container_of(timer, struct og_client_wol, timer); |
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146 | |
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147 | syslog(LOG_ERR, "timeout WakeOnLAN request for client %s\n", |
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148 | inet_ntoa(cli_wol->addr)); |
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149 | og_client_wol_destroy(cli_wol); |
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150 | } |
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151 | |
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152 | struct og_client_wol *og_client_wol_create(const struct in_addr *addr) |
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153 | { |
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154 | struct og_client_wol *cli_wol; |
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155 | |
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156 | cli_wol = calloc(1, sizeof(struct og_client_wol)); |
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157 | if (!cli_wol) |
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158 | return NULL; |
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159 | |
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160 | cli_wol->addr = *addr; |
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161 | |
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162 | ev_init(&cli_wol->timer, og_client_wol_timer_cb); |
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163 | cli_wol->timer.repeat = OG_WOL_CLIENT_TIMEOUT; |
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164 | ev_timer_again(og_loop, &cli_wol->timer); |
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165 | |
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166 | return cli_wol; |
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167 | } |
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168 | |
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169 | void og_client_wol_refresh(struct og_client_wol *cli_wol) |
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170 | { |
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171 | ev_timer_again(og_loop, &cli_wol->timer); |
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172 | } |
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173 | |
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174 | void og_client_wol_destroy(struct og_client_wol *cli_wol) |
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175 | { |
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176 | ev_timer_stop(og_loop, &cli_wol->timer); |
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177 | list_del(&cli_wol->list); |
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178 | free(cli_wol); |
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179 | } |
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180 | |
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181 | const char *og_client_wol_status(const struct og_client_wol *wol) |
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182 | { |
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183 | return "WOL_SENT"; |
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184 | } |
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