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1 | /* AFS network device helpers |
2 | * |
3 | * Copyright (c) 2007 Patrick McHardy <kaber@trash.net> |
4 | */ |
5 | |
6 | #include <linux/string.h> |
7 | #include <linux/rtnetlink.h> |
8 | #include <linux/inetdevice.h> |
9 | #include <linux/netdevice.h> |
10 | #include <linux/if_arp.h> |
11 | #include <net/net_namespace.h> |
12 | #include "internal.h" |
13 | |
14 | /* |
15 | * get a MAC address from a random ethernet interface that has a real one |
16 | * - the buffer will normally be 6 bytes in size |
17 | */ |
18 | int afs_get_MAC_address(u8 *mac, size_t maclen) |
19 | { |
20 | struct net_device *dev; |
21 | int ret = -ENODEV; |
22 | |
23 | BUG_ON(maclen != ETH_ALEN); |
24 | |
25 | rtnl_lock(); |
26 | dev = __dev_getfirstbyhwtype(&init_net, ARPHRD_ETHER); |
27 | if (dev) { |
28 | memcpy(mac, dev->dev_addr, maclen); |
29 | ret = 0; |
30 | } |
31 | rtnl_unlock(); |
32 | return ret; |
33 | } |
34 | |
35 | /* |
36 | * get a list of this system's interface IPv4 addresses, netmasks and MTUs |
37 | * - maxbufs must be at least 1 |
38 | * - returns the number of interface records in the buffer |
39 | */ |
40 | int afs_get_ipv4_interfaces(struct afs_interface *bufs, size_t maxbufs, |
41 | bool wantloopback) |
42 | { |
43 | struct net_device *dev; |
44 | struct in_device *idev; |
45 | int n = 0; |
46 | |
47 | ASSERT(maxbufs > 0); |
48 | |
49 | rtnl_lock(); |
50 | for_each_netdev(&init_net, dev) { |
51 | if (dev->type == ARPHRD_LOOPBACK && !wantloopback) |
52 | continue; |
53 | idev = __in_dev_get_rtnl(dev); |
54 | if (!idev) |
55 | continue; |
56 | for_primary_ifa(idev) { |
57 | bufs[n].address.s_addr = ifa->ifa_address; |
58 | bufs[n].netmask.s_addr = ifa->ifa_mask; |
59 | bufs[n].mtu = dev->mtu; |
60 | n++; |
61 | if (n >= maxbufs) |
62 | goto out; |
63 | } endfor_ifa(idev); |
64 | } |
65 | out: |
66 | rtnl_unlock(); |
67 | return n; |
68 | } |
69 |
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Tags:
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od-2011-09-18
v2.6.34-rc5
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