diff options
Diffstat (limited to 'net/netfilter/nf_conntrack_netlink.c')
| -rw-r--r-- | net/netfilter/nf_conntrack_netlink.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c index e8368e66b0f5..eb35c6151fb0 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c @@ -868,6 +868,7 @@ struct ctnetlink_filter { struct nf_conntrack_zone zone; struct ctnetlink_filter_u32 mark; + struct ctnetlink_filter_u32 status; }; static const struct nla_policy cta_filter_nla_policy[CTA_FILTER_MAX + 1] = { @@ -927,6 +928,28 @@ static int ctnetlink_filter_parse_mark(struct ctnetlink_filter_u32 *mark, return 0; } +static int ctnetlink_filter_parse_status(struct ctnetlink_filter_u32 *status, + const struct nlattr * const cda[]) +{ + if (cda[CTA_STATUS]) { + status->val = ntohl(nla_get_be32(cda[CTA_STATUS])); + if (cda[CTA_STATUS_MASK]) + status->mask = ntohl(nla_get_be32(cda[CTA_STATUS_MASK])); + else + status->mask = status->val; + + /* status->val == 0? always true, else always false. */ + if (status->mask == 0) + return -EINVAL; + } else if (cda[CTA_STATUS_MASK]) { + return -EINVAL; + } + + /* CTA_STATUS is NLA_U32, if this fires UAPI needs to be extended */ + BUILD_BUG_ON(__IPS_MAX_BIT >= 32); + return 0; +} + static struct ctnetlink_filter * ctnetlink_alloc_filter(const struct nlattr * const cda[], u8 family) { @@ -948,6 +971,10 @@ ctnetlink_alloc_filter(const struct nlattr * const cda[], u8 family) if (err) goto err_filter; + err = ctnetlink_filter_parse_status(&filter->status, cda); + if (err) + goto err_filter; + if (!cda[CTA_FILTER]) return filter; @@ -1001,7 +1028,7 @@ err_filter: static bool ctnetlink_needs_filter(u8 family, const struct nlattr * const *cda) { - return family || cda[CTA_MARK] || cda[CTA_FILTER]; + return family || cda[CTA_MARK] || cda[CTA_FILTER] || cda[CTA_STATUS]; } static int ctnetlink_start(struct netlink_callback *cb) @@ -1094,6 +1121,7 @@ static int ctnetlink_filter_match(struct nf_conn *ct, void *data) { struct ctnetlink_filter *filter = data; struct nf_conntrack_tuple *tuple; + u32 status; if (filter == NULL) goto out; @@ -1125,6 +1153,9 @@ static int ctnetlink_filter_match(struct nf_conn *ct, void *data) if ((ct->mark & filter->mark.mask) != filter->mark.val) goto ignore_entry; #endif + status = (u32)READ_ONCE(ct->status); + if ((status & filter->status.mask) != filter->status.val) + goto ignore_entry; out: return 1; @@ -1507,6 +1538,7 @@ static const struct nla_policy ct_nla_policy[CTA_MAX+1] = { [CTA_LABELS_MASK] = { .type = NLA_BINARY, .len = NF_CT_LABELS_MAX_SIZE }, [CTA_FILTER] = { .type = NLA_NESTED }, + [CTA_STATUS_MASK] = { .type = NLA_U32 }, }; static int ctnetlink_flush_iterate(struct nf_conn *ct, void *data) |