[IPV6] address: Convert address addition to new netlink api

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index fc9cff3..52ba96a 100644 (file)
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2868,6 +2868,29 @@ restart:
        spin_unlock_bh(&addrconf_verify_lock);
 }
 
+static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
+{
+       struct in6_addr *pfx = NULL;
+
+       if (addr)
+               pfx = nla_data(addr);
+
+       if (local) {
+               if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
+                       pfx = NULL;
+               else
+                       pfx = nla_data(local);
+       }
+
+       return pfx;
+}
+
+static struct nla_policy ifa_ipv6_policy[IFA_MAX+1] __read_mostly = {
+       [IFA_ADDRESS]           = { .len = sizeof(struct in6_addr) },
+       [IFA_LOCAL]             = { .len = sizeof(struct in6_addr) },
+       [IFA_CACHEINFO]         = { .len = sizeof(struct ifa_cacheinfo) },
+};
+
 static int
 inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 {
@@ -2945,46 +2968,41 @@ inet6_addr_modify(int ifindex, struct in6_addr *pfx,
 static int
 inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 {
-       struct rtattr  **rta = arg;
-       struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
+       struct ifaddrmsg *ifm;
+       struct nlattr *tb[IFA_MAX+1];
        struct in6_addr *pfx;
-       __u32 valid_lft = INFINITY_LIFE_TIME, prefered_lft = INFINITY_LIFE_TIME;
+       u32 valid_lft, preferred_lft;
+       int err;
 
-       pfx = NULL;
-       if (rta[IFA_ADDRESS-1]) {
-               if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx))
-                       return -EINVAL;
-               pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
-       }
-       if (rta[IFA_LOCAL-1]) {
-               if (RTA_PAYLOAD(rta[IFA_LOCAL-1]) < sizeof(*pfx) ||
-                   (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx))))
-                       return -EINVAL;
-               pfx = RTA_DATA(rta[IFA_LOCAL-1]);
-       }
+       err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
+       if (err < 0)
+               return err;
+
+       ifm = nlmsg_data(nlh);
+       pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
        if (pfx == NULL)
                return -EINVAL;
 
-       if (rta[IFA_CACHEINFO-1]) {
+       if (tb[IFA_CACHEINFO]) {
                struct ifa_cacheinfo *ci;
-               if (RTA_PAYLOAD(rta[IFA_CACHEINFO-1]) < sizeof(*ci))
-                       return -EINVAL;
-               ci = RTA_DATA(rta[IFA_CACHEINFO-1]);
+
+               ci = nla_data(tb[IFA_CACHEINFO]);
                valid_lft = ci->ifa_valid;
-               prefered_lft = ci->ifa_prefered;
+               preferred_lft = ci->ifa_prefered;
+       } else {
+               preferred_lft = INFINITY_LIFE_TIME;
+               valid_lft = INFINITY_LIFE_TIME;
        }
 
        if (nlh->nlmsg_flags & NLM_F_REPLACE) {
-               int ret;
-               ret = inet6_addr_modify(ifm->ifa_index, pfx,
-                                       prefered_lft, valid_lft);
-               if (ret == 0 || !(nlh->nlmsg_flags & NLM_F_CREATE))
-                       return ret;
+               err = inet6_addr_modify(ifm->ifa_index, pfx,
+                                       preferred_lft, valid_lft);
+               if (err == 0 || !(nlh->nlmsg_flags & NLM_F_CREATE))
+                       return err;
        }
 
        return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen,
-                             prefered_lft, valid_lft);
-
+                             preferred_lft, valid_lft);
 }
 
 /* Maximum length of ifa_cacheinfo attributes */