Get a list of all available network interfaces (en0, en1, en2, etc) with Cocoa?

In my Cocoa application I want to show the user a list of available network interfaces, like Wireshark does:

What is the best way 开发者_C百科of getting such a list? Does Apple provide a framework for this, or must I use a C API from the standard library or another library?

Better than wrapping ifconfig you shall check the reference of SCNetworkConfiguration which is part of Core Foundation.

Check SCNetworkInterfaceXxx functions for details.

related answer:

Using Cocoa / Objective-C, get currently connected network's security type in Mac OS X

The following code will get all the interfaces from OS X through System Configuration, then use standard C functions to get the IP addresses (where available).

#include <stdio.h>
#include <string.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/ioctl.h>
#include <net/if.h>
#define IFT_ETHER 0x6

#include <SystemConfiguration/SCDynamicStore.h>

+(void)getInterfaces
{
    SCDynamicStoreRef storeRef = SCDynamicStoreCreate(NULL, (CFStringRef)@"FindCurrentInterfaceIpMac", NULL, NULL);
    CFPropertyListRef global = SCDynamicStoreCopyValue (storeRef,CFSTR("State:/Network/Interface"));
    id primaryInterface = [(__bridge NSDictionary *)global valueForKey:@"Interfaces"];

    for (NSString* item in primaryInterface)
    {
        if(get_iface_address([item UTF8String]))
        {
            NSString *ip = [NSString stringWithUTF8String:get_iface_address([item UTF8String])];
            NSLog(@"interface: %@ - %@",item,ip);
        } else
            NSLog(@"interface: %@",item);
    }
}

static char * get_iface_address (char *interface)
{
    int sock;
    uint32_t ip;
    struct ifreq ifr;
    char *val;

    if (!interface)
        return NULL;

    /* determine UDN according to MAC address */
    sock = socket (AF_INET, SOCK_STREAM, 0);
    if (sock < 0)
    {
        perror ("socket");
        return NULL;
    }

    strcpy (ifr.ifr_name, interface);
    ifr.ifr_addr.sa_family = AF_INET;

    if (ioctl (sock, SIOCGIFADDR, &ifr) < 0)
    {
        perror ("ioctl");
        close (sock);
        return NULL;
    }

    val = (char *) malloc (16 * sizeof (char));
    ip = ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr;
    ip = ntohl (ip);
    sprintf (val, "%d.%d.%d.%d",
             (ip >> 24) & 0xFF, (ip >> 16) & 0xFF, (ip >> 8) & 0xFF, ip & 0xFF);

    close (sock);

    return val;
}

#include <SystemConfiguration/SCDynamicStore.h>

SCDynamicStoreRef storeRef = SCDynamicStoreCreate(NULL, (CFStringRef)@"FindCurrentInterfaceIpMac", NULL, NULL);
    CFPropertyListRef global = SCDynamicStoreCopyValue (storeRef,CFSTR("State:/Network/Interface"));
    id primaryInterface = [(__bridge NSDictionary *)global valueForKey:@"Interfaces"];

    for (NSString* item in primaryInterface)
    {
        NSLog(@"%@", item);
    }

Your quickest and best bet is to write a wrapper for ifconfig command.