diff options
Diffstat (limited to 'net/ipv6/addrconf.c')
| -rw-r--r-- | net/ipv6/addrconf.c | 63 |
1 files changed, 36 insertions, 27 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index f96d1de79509..081bb517e40d 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * IPv6 Address [auto]configuration * Linux INET6 implementation @@ -5,11 +6,6 @@ * Authors: * Pedro Roque <roque@di.fc.ul.pt> * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. */ /* @@ -5661,18 +5657,6 @@ static const struct nla_policy inet6_af_policy[IFLA_INET6_MAX + 1] = { [IFLA_INET6_TOKEN] = { .len = sizeof(struct in6_addr) }, }; -static int inet6_validate_link_af(const struct net_device *dev, - const struct nlattr *nla) -{ - struct nlattr *tb[IFLA_INET6_MAX + 1]; - - if (dev && !__in6_dev_get(dev)) - return -EAFNOSUPPORT; - - return nla_parse_nested_deprecated(tb, IFLA_INET6_MAX, nla, - inet6_af_policy, NULL); -} - static int check_addr_gen_mode(int mode) { if (mode != IN6_ADDR_GEN_MODE_EUI64 && @@ -5693,14 +5677,44 @@ static int check_stable_privacy(struct inet6_dev *idev, struct net *net, return 1; } +static int inet6_validate_link_af(const struct net_device *dev, + const struct nlattr *nla) +{ + struct nlattr *tb[IFLA_INET6_MAX + 1]; + struct inet6_dev *idev = NULL; + int err; + + if (dev) { + idev = __in6_dev_get(dev); + if (!idev) + return -EAFNOSUPPORT; + } + + err = nla_parse_nested_deprecated(tb, IFLA_INET6_MAX, nla, + inet6_af_policy, NULL); + if (err) + return err; + + if (!tb[IFLA_INET6_TOKEN] && !tb[IFLA_INET6_ADDR_GEN_MODE]) + return -EINVAL; + + if (tb[IFLA_INET6_ADDR_GEN_MODE]) { + u8 mode = nla_get_u8(tb[IFLA_INET6_ADDR_GEN_MODE]); + + if (check_addr_gen_mode(mode) < 0) + return -EINVAL; + if (dev && check_stable_privacy(idev, dev_net(dev), mode) < 0) + return -EINVAL; + } + + return 0; +} + static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla) { - int err = -EINVAL; struct inet6_dev *idev = __in6_dev_get(dev); struct nlattr *tb[IFLA_INET6_MAX + 1]; - - if (!idev) - return -EAFNOSUPPORT; + int err; if (nla_parse_nested_deprecated(tb, IFLA_INET6_MAX, nla, NULL, NULL) < 0) BUG(); @@ -5714,15 +5728,10 @@ static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla) if (tb[IFLA_INET6_ADDR_GEN_MODE]) { u8 mode = nla_get_u8(tb[IFLA_INET6_ADDR_GEN_MODE]); - if (check_addr_gen_mode(mode) < 0 || - check_stable_privacy(idev, dev_net(dev), mode) < 0) - return -EINVAL; - idev->cnf.addr_gen_mode = mode; - err = 0; } - return err; + return 0; } static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, |