如何確定流量是由GPRS 3G或Wifi生成的？

Question

在流量監測程序中，如何確定流量是由GPRS還是Wifi生成？ 請給我一些想法和建議？非常感謝 。

Answer 1

您可以檢查是否無線網絡由以下

ConnectivityManager conman = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); 
boolean wifi = conman.getNetworkInfo(ConnectivityManager.TYPE_WIFI).isConnected(); 

檢查其他網絡連接類型的連接可以通過改變TYPE_WIFI屬性來完成。

Answer 2

哦，我明白了！ 通過閱讀/ proc/self/net/dev或/ proc/net/dev來獲取應用程序流量統計信息。

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); 
    } 
}