source: npl/mediabox/lcdproc_edwin/src/clients/lcdproc/net.c

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#ifdef IRIX
#include <strings.h>
#endif
#include <unistd.h>
#include <fcntl.h>
#include <dirent.h>
#include <sys/time.h>

#include "../../shared/sockets.h"
#include "../../shared/LL.h"

#include "main.h"
#include "mode.h"
#include "mem.h"

//the kewl utilisation info struct
struct utilinfo {  //utilisation
    unsigned long llUp;
    unsigned long llDown;
    unsigned long llUpSpeed;
    unsigned long llDownSpeed;
};

int utilinfo_fd = 0;

static char device[10];

//some boring function..
long tvdiff(struct timeval a,struct timeval b) {
 return (((b.tv_sec-a.tv_sec)*1000000)+(b.tv_usec-a.tv_usec));
}

//TODO: ugly function - know what a codingstandard is?? :-)
static void get_util_info(struct utilinfo *result) 
{
//  int i, res; char *bufptr;
static struct timeval tv,tvprev;
static unsigned long long UpPrev,DownPrev;

char intf[10];
unsigned long rbyt,rpac,rerr,rdrop,rfifo,rframe,rcom,rmulti=0;
unsigned long tbyt,tpac,terr,tdrop,tfifo,tcolls,tcarr,tcom=0;
char bagger[5000];
char *start;
unsigned long diff;

 reread(utilinfo_fd, "get_utilinfo:");
 start=NULL;
 if (buffer) start=strstr(buffer,device);
 
 if (start) {
     sscanf(start,"%s %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu\n",intf,&rbyt,&rpac,&rerr,&rdrop,&rfifo,&rframe,&rcom,&rmulti, 
     &tbyt,&tpac,&terr,&tdrop,&tfifo,&tcolls,&tcarr,&tcom);
     printf(" net=(%s,%lu,%lu)\n",intf,rbyt,tbyt);
 }
 
 gettimeofday(&tv,NULL);
 diff=tvdiff(tvprev,tv);
 result->llUp=tbyt;
 result->llDown=rbyt;  
 result->llUpSpeed=((tbyt-UpPrev)*1000000)/(diff);
 result->llDownSpeed=((rbyt-DownPrev)*1000000)/(diff);

 //debug info: 
 printf(" net=(%s %lu %lu %lu %lu )\n",intf,result->llUp,result->llDown,result->llUpSpeed,result->llDownSpeed);

 tvprev=tv;
 UpPrev=tbyt;
 DownPrev=rbyt;
/*  result[0].total   = getentry("MemTotal:", buffer);
  //result[0].free    = getentry("MemFree:", buffer);
  re/sult[0].shared  = getentry("MemShared:", buffer);
  result[0].buffers = getentry("Buffers:", buffer);
  result[0].cache   = getentry("Cached:", buffer);
  result[1].total   = getentry("SwapTotal:", buffer);
  result[1].free    = getentry("SwapFree:", buffer); */
}


int net_init()
{
   if(!utilinfo_fd)
   {
      utilinfo_fd = open("/proc/net/dev",O_RDONLY);
   }
   strcpy(device,"eth0:");
   return 0;
}

int net_close()
{
   //i//f(uinfo_fd)
//      meminfo_fd = open("/proc/meminfo",O_RDONLY);
 close(utilinfo_fd);
   utilinfo_fd = 0;
   
   return 0;
}


/////////////////////////////////////////////////////////////////////////
// Mem Screen displays info about memory and swap usage...
//
int net_screen(int rep, int display)
{
  int n;
  struct utilinfo util;
  static int first = 1;
  static int which_title=0;
  float value;
  
  if(first)
  {
     first = 0;

     sock_send_string(sock, "screen_add M\n");
     sprintf(buffer, "screen_set M name {Memory & Swap: %s}\n", host);
     sock_send_string(sock, buffer);

     if(lcd_hgt >= 4)
     {
        sock_send_string(sock, "widget_add M title title\n");
        sock_send_string(sock, "widget_set M title { MEM -==- SWAP}\n");
        sock_send_string(sock, "widget_add M totl string\n");
        sock_send_string(sock, "widget_add M used string\n");
        sock_send_string(sock, "widget_set M totl 9 2 Totl\n");
        sock_send_string(sock, "widget_set M used 9 3 Free\n");
        sock_send_string(sock, "widget_add M EF string\n");
        sock_send_string(sock, "widget_set M EF 1 4 {E       F  E       F}\n");
        sock_send_string(sock, "widget_add M memused string\n");
        sock_send_string(sock, "widget_add M swapused string\n");
        //sock_send_string(sock, "widget_set M memgauge 2 4 0\n");
        //sock_send_string(sock, "widget_set M swapgauge 13 4 0\n");
     }
     else
     {
        sock_send_string(sock, "widget_add M m string\n");
        sock_send_string(sock, "widget_add M s string\n");
        if(lcd_wid >= 20)
        {
           sock_send_string(sock, "widget_set M m 1 1 {M     [       ]}\n");
           sock_send_string(sock, "widget_set M s 1 2 {S     [       ]}\n");
        }
        else
        {
           sock_send_string(sock, "widget_set M m 1 1 {M     [   ]}\n");
           sock_send_string(sock, "widget_set M s 1 2 {S     [   ]}\n");
        }
        sock_send_string(sock, "widget_add M mem% string\n");
        sock_send_string(sock, "widget_add M swap% string\n");
        sock_send_string(sock, "widget_set M mem% 16 1 { 0.0%}\n");
        sock_send_string(sock, "widget_set M swap% 16 2 { 0.0%}\n");
        
        //sock_send_string(sock, "widget_set M memgauge 8 1 0\n");
        //sock_send_string(sock, "widget_set M swapgauge 8 2 0\n");
     }

     sock_send_string(sock, "widget_add M memtotl string\n");
     sock_send_string(sock, "widget_add M swaptotl string\n");
     
     sock_send_string(sock, "widget_add M memgauge hbar\n");
     sock_send_string(sock, "widget_add M swapgauge hbar\n");
     
     //sock_send_string(sock, "\n");
  } //first


  get_util_info(&util);

  
  // flip the title back and forth...
 if(which_title & 4)
 {
  sprintf(buffer, "widget_set M title {%s}\n", host);
  sock_send_string(sock, buffer);
 }
 else sock_send_string(sock, "widget_set M title { MEM -==- SWAP}\n");

     which_title = (which_title + 1)&7;


     // Total memory
     //sprintf(tmp, "widget_set M memtotl 1 2 {%6dk}\n", mem[0].total);
     if(display) sock_send_string(sock, tmp);

  
  


  return 0;
} // End mem_screen()