/* AFS network device helpers * * Copyright (c) 2007 Patrick McHardy */ #include #include #include #include #include #include #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; } summary refs log tree commit diff

path: root/net/ipv4/tcp_illinois.c

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