From 78dce59594ebe24123889d0b5a4e7f224c811ac2 Mon Sep 17 00:00:00 2001
From: Jonathan McCrohan <jmccrohan@gmail.com>
Date: Tue, 1 Nov 2011 14:46:28 +0000
Subject: Integrated MAC address code into modbuslog.c

---
 modbuslog.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 52 insertions(+), 5 deletions(-)

(limited to 'modbuslog.c')

diff --git a/modbuslog.c b/modbuslog.c
index ec0acc4..e46c9a7 100644
--- a/modbuslog.c
+++ b/modbuslog.c
@@ -32,6 +32,12 @@
 #include <libconfig.h>
 #include <modbus.h>
 
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <net/if.h>
+#include <string.h>
+
 #define SLAVE_ID 1
 #define START_ADDRESS 0
 #define NUMBER_REGISTERS 14
@@ -41,18 +47,35 @@ void minute_check(int signum){
  alarm(60);
 }
 
+void getmac(unsigned char* mac_address){
+    int s;
+    struct ifreq ifr;
+
+    s = socket(PF_INET, SOCK_DGRAM, 0);
+    memset(&ifr, 0x00, sizeof(ifr));
+    strcpy(ifr.ifr_name, "eth0");
+    ioctl(s, SIOCGIFHWADDR, &ifr);
+    close(s);
 
+    unsigned char mac_address_internal[6];
+    sprintf(mac_address_internal,"%.2X%.2X%.2X%.2X%.2X%.2X", (unsigned char) ifr.ifr_hwaddr.sa_data[0], (unsigned char) ifr.ifr_hwaddr.sa_data[1], (unsigned char) ifr.ifr_hwaddr.sa_data[2], (unsigned char) ifr.ifr_hwaddr.sa_data[3], (unsigned char) ifr.ifr_hwaddr.sa_data[4], (unsigned char) ifr.ifr_hwaddr.sa_data[5]);
+
+    strcpy(mac_address,mac_address_internal);
+}
 
 
 
 int main(int argc, char *argv[])
 {
 
-  const char *CONFIG_FILE = "modbuslog.cfg";
+ const char *CONFIG_FILE = "modbuslog.cfg";
 
  config_t cfg;
  //config_setting_t *setting;
 
+ //unsigned char* mac_address;
+ unsigned char mac_address[6]; 
+
  const char *modbus_device_address;
  int modbus_baud_rate;
  int modbus_data_bits;
@@ -61,6 +84,10 @@ int main(int argc, char *argv[])
 
  config_init(&cfg);
 
+ getmac(mac_address);
+ if(DEBUG){
+printf("%s\n",mac_address);
+}
 
   if(!config_read_file(&cfg, CONFIG_FILE))
   {
@@ -99,9 +126,9 @@ int main(int argc, char *argv[])
   select(0, NULL, NULL, NULL, NULL);
 
   time_t t = time(NULL);
-  //int unixtime_min = (((int) t)/60*60);
-  int unixtime = (int) t;
-  printf("%d\n", unixtime);
+  int unixtime_min = (((int) t)/60*60);
+  //int unixtime = (int) t;
+  //printf("%d\n", unixtime);
   
   config_setting_t *registers;
 
@@ -114,9 +141,29 @@ int main(int argc, char *argv[])
    config_setting_t *register_element = config_setting_get_elem(registers, i);
    int slaveid;
    config_setting_lookup_int(register_element, "slaveid", &slaveid);
+   int intervalvalue;
+   config_setting_lookup_int(register_element, "intervalvalue", &intervalvalue);
+   printf("%d", intervalvalue);
+
+   const char *intervalunit;
+   config_setting_lookup_string(register_element, "intervalunit", &intervalunit);
+
+   printf("%c", intervalunit[0]);
+
+   int intervalduration;
+
+   if(intervalunit[0]=='H')
+	intervalduration=intervalvalue*3600;
+   else
+	intervalduration=intervalvalue*60;
+
+   if(unixtime_min%intervalduration==0){
+	printf("specified minute.  %d %d\n", unixtime_min, intervalduration);
+   }
+
    printf("%d ", slaveid);
   }
-  printf("\n");
+  printf("%d\n",unixtime_min);
  }
 }
 
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