'How to determine the flow is generated by GPRS 3G or Wifi?
In the flow monitoring program, how to determine the flow is generated by GPRS or Wifi ? Please provide me some ideas and suggestions? Thanks a lot .
Solution 1:[1]
You can check to see if wifi is connected by the following
ConnectivityManager conman = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
boolean wifi = conman.getNetworkInfo(ConnectivityManager.TYPE_WIFI).isConnected();
Checking for other network connection types can be done by changing the TYPE_WIFI property.
Solution 2:[2]
Oh,I got it! Through reading /proc/self/net/dev or /proc/net/dev to get the application flow statistics .
void skipline(FILE *f)
{
int ch;
do {
ch = getc(f);
} while ( ch != 'n' && ch != EOF );
}
int main(int argc, char *argv[])
{
FILE *pnd;
char buffer[BUFSIZ];
char *interface;
struct ifinfo {
char name[8];
unsigned int r_bytes, r_pkt, r_err, r_drop, r_fifo, r_frame;
unsigned int r_compr, r_mcast;
unsigned int x_bytes, x_pkt, x_err, x_drop, x_fifo, x_coll;
unsigned int x_carrier, x_compr;
} ifc;
unsigned long long bin, bout, lbin, lbout;
int first;
if ( argc != 2 ) {
fprintf(stderr, "Usage: %s interfacen", argv[0]);
exit(1);
}
interface = argv[1];
first = 1;
lbin = 0; lbout = 0;
while ( 1 ) {
pnd = fopen("/proc/net/dev", "r");
if ( !pnd ) {
fprintf(stderr, "%s: /proc/net/dev: %s", argv[0], strerror(errno));
exit(1);
}
/* Skip header */
skipline(pnd);
skipline(pnd);
/* Get interface info */
do {
if ( fscanf(pnd, " %6[^:]:%u %u %u %u %u %u %u %u %u %u %u %u %u %u %u",
&ifc.name,
&ifc.r_bytes, &ifc.r_pkt, &ifc.r_err, &ifc.r_drop,
&ifc.r_fifo, &ifc.r_frame, &ifc.r_compr, &ifc.r_mcast,
&ifc.x_bytes, &ifc.x_pkt, &ifc.x_err, &ifc.x_drop,
&ifc.x_fifo, &ifc.x_coll, &ifc.x_carrier, &ifc.x_compr)
!= 16 ) {
exit(200);
}
skipline(pnd);
} while ( strcmp(ifc.name, interface) );
bin = ifc.r_bytes + (lbin & ~0xffffffffULL);
bout = ifc.x_bytes + (lbout & ~0xffffffffULL);
if ( bin < lbin )
bin += (1ULL << 32);
if ( bout < lbout )
bout += (1ULL << 32);
if ( !first ) {
printf("%d %Lu %Lun", time(NULL), (bout-lbout)*8, (bin-lbin)*8);
fflush(stdout);
} else {
first = 0;
}
lbin = bin; lbout = bout;
fclose(pnd);
sleep(1);
}
}
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
Solution | Source |
---|---|
Solution 1 | Spencer |
Solution 2 | Carina |