git.zerfleddert.de Git - hmcfgusb/blob - hmsniff.c

   1 /* HM-sniffer for HM-CFG-USB
   2  *
   3  * Copyright (c) 2013 Michael Gernoth <michael@gernoth.net>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a copy
   6  * of this software and associated documentation files (the "Software"), to
   7  * deal in the Software without restriction, including without limitation the
   8  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
   9  * sell copies of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <unistd.h>
  27 #include <stdint.h>
  28 #include <string.h>
  29 #include <strings.h>
  30 #include <poll.h>
  31 #include <errno.h>
  32 #include <sys/time.h>
  33 #include <libusb-1.0/libusb.h>
  34
  35 #include "hexdump.h"
  36 #include "hmcfgusb.h"
  37
  38 /* See HMConfig.pm */
  39 char *hm_message_types(uint8_t type)
  40 {
  41         switch(type) {
  42                 case 0x00:
  43                         return "Device Info";
  44                         break;
  45                 case 0x01:
  46                         return "Configuration";
  47                         break;
  48                 case 0x02:
  49                         return "Acknowledge";
  50                         break;
  51                 case 0x03:
  52                         return "AES";
  53                         break;
  54                 case 0x04:
  55                         return "AES-Key";
  56                         break;
  57                 case 0x10:
  58                         return "Information";
  59                         break;
  60                 case 0x11:
  61                         return "SET";
  62                         break;
  63                 case 0x12:
  64                         return "HAVE_DATA";
  65                         break;
  66                 case 0x3e:
  67                         return "Switch";
  68                         break;
  69                 case 0x3f:
  70                         return "Timestamp";
  71                         break;
  72                 case 0x40:
  73                         return "Remote";
  74                         break;
  75                 case 0x41:
  76                         return "Sensor";
  77                         break;
  78                 case 0x53:
  79                         return "Water sensor";
  80                         break;
  81                 case 0x58:
  82                         return "Climate event";
  83                         break;
  84                 case 0x70:
  85                         return "Weather event";
  86                         break;
  87                 default:
  88                         return "?";
  89                         break;
  90         }
  91 }
  92
  93 static void dissect_hm(uint8_t *buf, int len)
  94 {
  95         struct timeval tv;
  96         struct tm *tmp;
  97         char ts[32];
  98         int i;
  99
 100         gettimeofday(&tv, NULL);
 101         tmp = localtime(&tv.tv_sec);
 102         memset(ts, 0, sizeof(ts));
 103         strftime(ts, sizeof(ts)-1, "%Y-%m-%d %H:%M:%S", tmp);
 104         printf("%s.%06ld: ", ts, tv.tv_usec);
 105
 106         for (i = 0; i < len; i++) {
 107                 printf("%02X", buf[i]);
 108         }
 109         printf("\n");
 110         printf("Packet information:\n");
 111         printf("\tLength: %u\n", buf[0]);
 112         printf("\tMessage ID: %u\n", buf[1]);
 113         printf("\tSender: %02x%02x%02x\n", buf[4], buf[5], buf[6]);
 114         printf("\tReceiver: %02x%02x%02x\n", buf[7], buf[8], buf[9]);
 115         printf("\tControl Byte: 0x%02x\n", buf[2]);
 116         printf("\t\tFlags: ");
 117         if (buf[2] & (1 << 0)) printf("WAKEUP ");
 118         if (buf[2] & (1 << 1)) printf("WAKEMEUP ");
 119         if (buf[2] & (1 << 2)) printf("CFG ");
 120         if (buf[2] & (1 << 3)) printf("? ");
 121         if (buf[2] & (1 << 4)) printf("BURST ");
 122         if (buf[2] & (1 << 5)) printf("BIDI ");
 123         if (buf[2] & (1 << 6)) printf("RPTED ");
 124         if (buf[2] & (1 << 7)) printf("RPTEN ");
 125         printf("\n");
 126         printf("\tMessage type: %s (0x%02x)\n", hm_message_types(buf[3]), buf[3]);
 127         printf("\tMesage: ");
 128         for (i = 10; i < len; i++) {
 129                 printf("%02X", buf[i]);
 130         }
 131         printf("\n");
 132
 133         printf("\n");
 134
 135 }
 136
 137 struct recv_data {
 138         int wrong_hmid;
 139 };
 140
 141 static int parse_hmcfgusb(uint8_t *buf, int buf_len, void *data)
 142 {
 143         struct recv_data *rdata = data;
 144
 145         if (buf_len < 1)
 146                 return 1;
 147
 148         switch(buf[0]) {
 149                 case 'E':
 150                         dissect_hm(buf + 13, buf[13] + 1);
 151                         break;
 152                 case 'H':
 153                         if ((buf[27] != 0x00) ||
 154                             (buf[28] != 0x00) ||
 155                             (buf[29] != 0x00)) {
 156                                 printf("hmId is currently set to: %02x%02x%02x\n", buf[27], buf[28], buf[29]);
 157                                 rdata->wrong_hmid = 1;
 158                         }
 159                         break;
 160                 case 'R':
 161                 case 'I':
 162                         break;
 163                 default:
 164                         hexdump(buf, buf_len, "Unknown> ");
 165                         break;
 166         }
 167
 168         return 1;
 169 }
 170
 171 int main(int argc, char **argv)
 172 {
 173         struct hmcfgusb_dev *dev;
 174         struct recv_data rdata;
 175         int quit = 0;
 176
 177         hmcfgusb_set_debug(0);
 178
 179         do {
 180                 memset(&rdata, 0, sizeof(rdata));
 181                 rdata.wrong_hmid = 0;
 182
 183                 dev = hmcfgusb_init(parse_hmcfgusb, &rdata);
 184                 if (!dev) {
 185                         fprintf(stderr, "Can't initialize HM-CFG-USB, retrying in 1s...\n");
 186                         sleep(1);
 187                         continue;
 188                 }
 189                 printf("HM-CFG-USB opened!\n");
 190
 191                 hmcfgusb_send_null_frame(dev);
 192                 hmcfgusb_send(dev, (unsigned char*)"K", 1, 1);
 193
 194                 while(!quit) {
 195                         int fd;
 196
 197                         if (rdata.wrong_hmid) {
 198                                 printf("changing hmId to 000000, this might reboot the device!\n");
 199                                 hmcfgusb_send(dev, (unsigned char*)"A\00\00\00", 4, 1);
 200                                 rdata.wrong_hmid = 0;
 201                                 hmcfgusb_send(dev, (unsigned char*)"K", 1, 1);
 202                         }
 203                         fd = hmcfgusb_poll(dev, 1);
 204                         if (fd >= 0) {
 205                                 fprintf(stderr, "activity on unknown fd %d!\n", fd);
 206                                 continue;
 207                         } else if (fd == -1) {
 208                                 if (errno) {
 209                                         perror("hmcfgusb_poll");
 210                                         break;
 211                                 } else {
 212                                         /* periodically wakeup the device */
 213                                         hmcfgusb_send_null_frame(dev);
 214                                 }
 215                         }
 216                 }
 217
 218                 hmcfgusb_close(dev);
 219         } while (!quit);
 220
 221         return EXIT_SUCCESS;
 222 }