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cfg80211: introduce nl80211_get_ifidx()

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... which get's rid of three indentical cut-n-paste sections.

Signed-off-by: Holger Schurig <holgerschurig@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Holger Schurig 2009-11-11 11:30:02 +01:00 committed by John W. Linville
parent f273fe55e3
commit a043897a31
1 changed files with 33 additions and 43 deletions
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76
net/wireless/nl80211.c
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@ -152,6 +152,26 @@ nl80211_key_policy[NL80211_KEY_MAX + 1] __read_mostly = {
[NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
};
/* ifidx get helper */
static int nl80211_get_ifidx(struct netlink_callback *cb)
{
int res;
res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
nl80211_fam.attrbuf, nl80211_fam.maxattr,
nl80211_policy);
if (res)
return res;
if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
return -EINVAL;
res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
if (!res)
return -EINVAL;
return res;
}
/* IE validation */
static bool is_valid_ie_attr(const struct nlattr *attr)
{
@ -1693,20 +1713,10 @@ static int nl80211_dump_station(struct sk_buff *skb,
int sta_idx = cb->args[1];
int err;
if (!ifidx) {
err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
nl80211_fam.attrbuf, nl80211_fam.maxattr,
nl80211_policy);
if (err)
return err;
if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
return -EINVAL;
ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
if (!ifidx)
return -EINVAL;
}
if (!ifidx)
ifidx = nl80211_get_ifidx(cb);
if (ifidx < 0)
return ifidx;
rtnl_lock();
@ -2156,20 +2166,10 @@ static int nl80211_dump_mpath(struct sk_buff *skb,
int path_idx = cb->args[1];
int err;
if (!ifidx) {
err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
nl80211_fam.attrbuf, nl80211_fam.maxattr,
nl80211_policy);
if (err)
return err;
if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
return -EINVAL;
ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
if (!ifidx)
return -EINVAL;
}
if (!ifidx)
ifidx = nl80211_get_ifidx(cb);
if (ifidx < 0)
return ifidx;
rtnl_lock();
@ -3198,21 +3198,11 @@ static int nl80211_dump_scan(struct sk_buff *skb,
int start = cb->args[1], idx = 0;
int err;
if (!ifidx) {
err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
nl80211_fam.attrbuf, nl80211_fam.maxattr,
nl80211_policy);
if (err)
return err;
if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
return -EINVAL;
ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
if (!ifidx)
return -EINVAL;
cb->args[0] = ifidx;
}
if (!ifidx)
ifidx = nl80211_get_ifidx(cb);
if (ifidx < 0)
return ifidx;
cb->args[0] = ifidx;
dev = dev_get_by_index(sock_net(skb->sk), ifidx);
if (!dev)