nl80211: add a few extended error strings to key parsing
This mostly serves as an example for how to add error strings and erroneous attribute pointers. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Родитель
6c2fb1e652
Коммит
768075ebc2
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@ -734,11 +734,12 @@ struct key_parse {
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bool def_uni, def_multi;
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};
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static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
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static int nl80211_parse_key_new(struct genl_info *info, struct nlattr *key,
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struct key_parse *k)
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{
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struct nlattr *tb[NL80211_KEY_MAX + 1];
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int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
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nl80211_key_policy, NULL);
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nl80211_key_policy, info->extack);
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if (err)
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return err;
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@ -771,7 +772,8 @@ static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
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if (tb[NL80211_KEY_TYPE]) {
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k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
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if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
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return -EINVAL;
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return genl_err_attr(info, -EINVAL,
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tb[NL80211_KEY_TYPE]);
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}
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if (tb[NL80211_KEY_DEFAULT_TYPES]) {
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@ -779,7 +781,8 @@ static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
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err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
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tb[NL80211_KEY_DEFAULT_TYPES],
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nl80211_key_default_policy, NULL);
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nl80211_key_default_policy,
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info->extack);
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if (err)
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return err;
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@ -820,8 +823,10 @@ static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
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if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
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k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
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if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
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if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES) {
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GENL_SET_ERR_MSG(info, "key type out of range");
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return -EINVAL;
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}
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}
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if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
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@ -850,31 +855,42 @@ static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
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k->type = -1;
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if (info->attrs[NL80211_ATTR_KEY])
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err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
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err = nl80211_parse_key_new(info, info->attrs[NL80211_ATTR_KEY], k);
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else
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err = nl80211_parse_key_old(info, k);
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if (err)
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return err;
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if (k->def && k->defmgmt)
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if (k->def && k->defmgmt) {
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GENL_SET_ERR_MSG(info, "key with def && defmgmt is invalid");
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return -EINVAL;
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}
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if (k->defmgmt) {
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if (k->def_uni || !k->def_multi)
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if (k->def_uni || !k->def_multi) {
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GENL_SET_ERR_MSG(info, "defmgmt key must be mcast");
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return -EINVAL;
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}
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}
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if (k->idx != -1) {
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if (k->defmgmt) {
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if (k->idx < 4 || k->idx > 5)
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if (k->idx < 4 || k->idx > 5) {
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GENL_SET_ERR_MSG(info,
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"defmgmt key idx not 4 or 5");
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return -EINVAL;
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}
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} else if (k->def) {
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if (k->idx < 0 || k->idx > 3)
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if (k->idx < 0 || k->idx > 3) {
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GENL_SET_ERR_MSG(info, "def key idx not 0-3");
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return -EINVAL;
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}
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} else {
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if (k->idx < 0 || k->idx > 5)
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if (k->idx < 0 || k->idx > 5) {
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GENL_SET_ERR_MSG(info, "key idx not 0-5");
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return -EINVAL;
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}
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}
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}
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@ -883,8 +899,9 @@ static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
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static struct cfg80211_cached_keys *
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nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
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struct nlattr *keys, bool *no_ht)
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struct genl_info *info, bool *no_ht)
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{
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struct nlattr *keys = info->attrs[NL80211_ATTR_KEYS];
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struct key_parse parse;
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struct nlattr *key;
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struct cfg80211_cached_keys *result;
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@ -909,17 +926,22 @@ nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
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memset(&parse, 0, sizeof(parse));
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parse.idx = -1;
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err = nl80211_parse_key_new(key, &parse);
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err = nl80211_parse_key_new(info, key, &parse);
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if (err)
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goto error;
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err = -EINVAL;
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if (!parse.p.key)
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goto error;
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if (parse.idx < 0 || parse.idx > 3)
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if (parse.idx < 0 || parse.idx > 3) {
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GENL_SET_ERR_MSG(info, "key index out of range [0-3]");
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goto error;
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}
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if (parse.def) {
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if (def)
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if (def) {
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GENL_SET_ERR_MSG(info,
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"only one key can be default");
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goto error;
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}
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def = 1;
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result->def = parse.idx;
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if (!parse.def_uni || !parse.def_multi)
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@ -932,6 +954,7 @@ nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
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goto error;
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if (parse.p.cipher != WLAN_CIPHER_SUITE_WEP40 &&
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parse.p.cipher != WLAN_CIPHER_SUITE_WEP104) {
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GENL_SET_ERR_MSG(info, "connect key must be WEP");
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err = -EINVAL;
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goto error;
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}
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@ -947,6 +970,7 @@ nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
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if (result->def < 0) {
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err = -EINVAL;
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GENL_SET_ERR_MSG(info, "need a default/TX key");
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goto error;
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}
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@ -8611,9 +8635,7 @@ static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
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if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
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bool no_ht = false;
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connkeys = nl80211_parse_connkeys(rdev,
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info->attrs[NL80211_ATTR_KEYS],
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&no_ht);
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connkeys = nl80211_parse_connkeys(rdev, info, &no_ht);
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if (IS_ERR(connkeys))
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return PTR_ERR(connkeys);
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@ -9017,8 +9039,7 @@ static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
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}
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if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
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connkeys = nl80211_parse_connkeys(rdev,
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info->attrs[NL80211_ATTR_KEYS], NULL);
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connkeys = nl80211_parse_connkeys(rdev, info, NULL);
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if (IS_ERR(connkeys))
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return PTR_ERR(connkeys);
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}
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