add possibility to log network communication
[hmcfgusb] / hmsniff.c
index 67a2df6ae004e4fdd6b318c1154c87ed1ea75012..a3cbe7a244ffd96304018b7e5a383a68bee62f13 100644 (file)
--- a/hmsniff.c
+++ b/hmsniff.c
@@ -32,6 +32,7 @@
 #include <sys/time.h>
 #include <libusb-1.0/libusb.h>
 
+#include "version.h"
 #include "hexdump.h"
 #include "hmcfgusb.h"
 
@@ -138,12 +139,12 @@ struct recv_data {
        int wrong_hmid;
 };
 
-static void parse_hmcfgusb(uint8_t *buf, int buf_len, void *data)
+static int parse_hmcfgusb(uint8_t *buf, int buf_len, void *data)
 {
        struct recv_data *rdata = data;
 
        if (buf_len < 1)
-               return;
+               return 1;
 
        switch(buf[0]) {
                case 'E':
@@ -164,6 +165,8 @@ static void parse_hmcfgusb(uint8_t *buf, int buf_len, void *data)
                        hexdump(buf, buf_len, "Unknown> ");
                        break;
        }
+
+       return 1;
 }
 
 int main(int argc, char **argv)
@@ -186,6 +189,7 @@ int main(int argc, char **argv)
                }
                printf("HM-CFG-USB opened!\n");
 
+               hmcfgusb_send_null_frame(dev, 1);
                hmcfgusb_send(dev, (unsigned char*)"K", 1, 1);
 
                while(!quit) {
@@ -197,14 +201,19 @@ int main(int argc, char **argv)
                                rdata.wrong_hmid = 0;
                                hmcfgusb_send(dev, (unsigned char*)"K", 1, 1);
                        }
-                       fd = hmcfgusb_poll(dev, 10);
+                       fd = hmcfgusb_poll(dev, 1000);
                        if (fd >= 0) {
                                fprintf(stderr, "activity on unknown fd %d!\n", fd);
                                continue;
                        } else if (fd == -1) {
                                if (errno) {
-                                       perror("hmcfgusb_poll");
-                                       break;
+                                       if (errno != ETIMEDOUT) {
+                                               perror("hmcfgusb_poll");
+                                               break;
+                                       } else {
+                                               /* periodically wakeup the device */
+                                               hmcfgusb_send_null_frame(dev, 1);
+                                       }
                                }
                        }
                }
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