69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
/* AFS network device helpers
|
|
*
|
|
* Copyright (c) 2007 Patrick McHardy <kaber@trash.net>
|
|
*/
|
|
|
|
#include <linux/string.h>
|
|
#include <linux/rtnetlink.h>
|
|
#include <linux/inetdevice.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/if_arp.h>
|
|
#include <net/net_namespace.h>
|
|
#include "internal.h"
|
|
|
|
/*
|
|
* get a MAC address from a random ethernet interface that has a real one
|
|
* - the buffer will normally be 6 bytes in size
|
|
*/
|
|
int afs_get_MAC_address(u8 *mac, size_t maclen)
|
|
{
|
|
struct net_device *dev;
|
|
int ret = -ENODEV;
|
|
|
|
BUG_ON(maclen != ETH_ALEN);
|
|
|
|
rtnl_lock();
|
|
dev = __dev_getfirstbyhwtype(&init_net, ARPHRD_ETHER);
|
|
if (dev) {
|
|
memcpy(mac, dev->dev_addr, maclen);
|
|
ret = 0;
|
|
}
|
|
rtnl_unlock();
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* get a list of this system's interface IPv4 addresses, netmasks and MTUs
|
|
* - maxbufs must be at least 1
|
|
* - returns the number of interface records in the buffer
|
|
*/
|
|
int afs_get_ipv4_interfaces(struct afs_interface *bufs, size_t maxbufs,
|
|
bool wantloopback)
|
|
{
|
|
struct net_device *dev;
|
|
struct in_device *idev;
|
|
int n = 0;
|
|
|
|
ASSERT(maxbufs > 0);
|
|
|
|
rtnl_lock();
|
|
for_each_netdev(&init_net, dev) {
|
|
if (dev->type == ARPHRD_LOOPBACK && !wantloopback)
|
|
continue;
|
|
idev = __in_dev_get_rtnl(dev);
|
|
if (!idev)
|
|
continue;
|
|
for_primary_ifa(idev) {
|
|
bufs[n].address.s_addr = ifa->ifa_address;
|
|
bufs[n].netmask.s_addr = ifa->ifa_mask;
|
|
bufs[n].mtu = dev->mtu;
|
|
n++;
|
|
if (n >= maxbufs)
|
|
goto out;
|
|
} endfor_ifa(idev);
|
|
}
|
|
out:
|
|
rtnl_unlock();
|
|
return n;
|
|
}
|