By Sahil Khanna


2011-10-30 17:56:13 8 Comments

I've searched over this topic but found very few details which were helpful. With these details I've tried to cook some code as follows.

Note: Please compare the details shared in this post with other posts before marking this as DUPLICATE, and not just by the subject.

- (NSArray *)getDataCountersForType:(int)type {
    BOOL success;
    struct ifaddrs *addrs = nil;
    const struct ifaddrs *cursor = nil;
    const struct sockaddr_dl *dlAddr = nil;
    const struct if_data *networkStatisc = nil; 

    int dataSent = 0;
    int dataReceived = 0;

    success = getifaddrs(&addrs) == 0;
    if (success) {
        cursor = addrs;
        while (cursor != NULL) {
            if (cursor->ifa_addr->sa_family == AF_LINK) {
                dlAddr = (const struct sockaddr_dl *) cursor->ifa_addr;
                networkStatisc = (const struct if_data *) cursor->ifa_data;

                if (type == WiFi) {
                    dataSent += networkStatisc->ifi_opackets;
                    dataReceived += networkStatisc->ifi_ipackets;   
                }
                else if (type == WWAN) {
                    dataSent += networkStatisc->ifi_obytes;
                    dataReceived += networkStatisc->ifi_ibytes; 
                }
            }
            cursor = cursor->ifa_next;
        }
        freeifaddrs(addrs);
    }       
    return [NSArray arrayWithObjects:[NSNumber numberWithInt:dataSent], [NSNumber numberWithInt:dataReceived], nil];    
}

This code collects information of internet usage of an iPhone device (and not my application alone).

Now, if I use internet through WiFi or through 3G, I get the the data (bytes) only in ifi_obytes (sent) and ifi_ibytes (received) but I think I should get WiFi usage in ifi_opackets and ifi_ipackets.

Also wanted to add that if I'm connected to a WiFi network, but am not using internet, I still get value added to ifi_obytes and ifi_ibytes.

May be I'm wrong in the implementation or understanding. Need someone to help me out.


Edit: Instead of AF_LINK I tried AF_INET (sockaddr_in instead of sockaddr_dl). This crashes the application.

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