diff options
| author | David Ahern <dsahern@gmail.com> | 2017-05-27 16:19:26 -0600 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-05-30 11:55:31 -0400 |
| commit | 78055998954b7a3e6c31eb24d1d26f0b63a7ec0d (patch) | |
| tree | ad1f4fd34da0b9faee5219a3490cbf729228ba96 /net/ipv4/fib_trie.c | |
| parent | ba277e8e05dbd4aa13f74f859e276d5d54467eab (diff) | |
net: ipv4: Add extack message for invalid prefix or length
Add extack error message for invalid prefix length and invalid prefix.
Example of the latter is a route spec containing 172.16.100.1/24, where
the /24 mask means the lower 8-bits should be 0. Amazing how easy that
one is to overlook when an EINVAL is returned.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/fib_trie.c')
| -rw-r--r-- | net/ipv4/fib_trie.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c index 9bd46e1e1037..a624d380c81d 100644 --- a/net/ipv4/fib_trie.c +++ b/net/ipv4/fib_trie.c @@ -1099,13 +1099,18 @@ static int fib_insert_alias(struct trie *t, struct key_vector *tp, return 0; } -static bool fib_valid_key_len(u32 key, u8 plen) +static bool fib_valid_key_len(u32 key, u8 plen, struct netlink_ext_ack *extack) { - if (plen > KEYLENGTH) + if (plen > KEYLENGTH) { + NL_SET_ERR_MSG(extack, "Invalid prefix length"); return false; + } - if ((plen < KEYLENGTH) && (key << plen)) + if ((plen < KEYLENGTH) && (key << plen)) { + NL_SET_ERR_MSG(extack, + "Invalid prefix for given prefix length"); return false; + } return true; } @@ -1128,7 +1133,7 @@ int fib_table_insert(struct net *net, struct fib_table *tb, key = ntohl(cfg->fc_dst); - if (!fib_valid_key_len(key, plen)) + if (!fib_valid_key_len(key, plen, extack)) return -EINVAL; pr_debug("Insert table=%u %08x/%d\n", tb->tb_id, key, plen); @@ -1516,7 +1521,7 @@ static void fib_remove_alias(struct trie *t, struct key_vector *tp, /* Caller must hold RTNL. */ int fib_table_delete(struct net *net, struct fib_table *tb, - struct fib_config *cfg) + struct fib_config *cfg, struct netlink_ext_ack *extack) { struct trie *t = (struct trie *) tb->tb_data; struct fib_alias *fa, *fa_to_delete; @@ -1528,7 +1533,7 @@ int fib_table_delete(struct net *net, struct fib_table *tb, key = ntohl(cfg->fc_dst); - if (!fib_valid_key_len(key, plen)) + if (!fib_valid_key_len(key, plen, extack)) return -EINVAL; l = fib_find_node(t, &tp, key); |