From 5f823f8fd90dc77b4256fc6cc296834cbe5c0f21 Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Mon, 2 Aug 2021 11:12:29 +0200 Subject: src: add support for status dump filter This tells kernel to suppress conntrack entries that do not match the status bits/bitmask filter. This is useful to e.g. only list entries that are not assured (value 0, mask == ASSUED) or entries that only saw one-way traffic (value 0, mask == SEEN_REPLY). Signed-off-by: Florian Westphal --- src/conntrack/filter_dump.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'src/conntrack') diff --git a/src/conntrack/filter_dump.c b/src/conntrack/filter_dump.c index 158b4cb..3894d06 100644 --- a/src/conntrack/filter_dump.c +++ b/src/conntrack/filter_dump.c @@ -19,6 +19,16 @@ set_filter_dump_attr_mark(struct nfct_filter_dump *filter_dump, filter_dump->mark.mask = this->mask; } +static void +set_filter_dump_attr_status(struct nfct_filter_dump *filter_dump, + const void *value) +{ + const struct nfct_filter_dump_mark *this = value; + + filter_dump->status.val = this->val; + filter_dump->status.mask = this->mask; +} + static void set_filter_dump_attr_family(struct nfct_filter_dump *filter_dump, const void *value) @@ -29,6 +39,7 @@ set_filter_dump_attr_family(struct nfct_filter_dump *filter_dump, const set_filter_dump_attr set_filter_dump_attr_array[NFCT_FILTER_DUMP_MAX] = { [NFCT_FILTER_DUMP_MARK] = set_filter_dump_attr_mark, [NFCT_FILTER_DUMP_L3NUM] = set_filter_dump_attr_family, + [NFCT_FILTER_DUMP_STATUS] = set_filter_dump_attr_status, }; void __build_filter_dump(struct nfnlhdr *req, size_t size, @@ -44,4 +55,10 @@ void __build_filter_dump(struct nfnlhdr *req, size_t size, struct nfgenmsg *nfg = NLMSG_DATA(&req->nlh); nfg->nfgen_family = filter_dump->l3num; } + if (filter_dump->set & (1 << NFCT_FILTER_DUMP_STATUS)) { + nfnl_addattr32(&req->nlh, size, CTA_STATUS, + htonl(filter_dump->status.val)); + nfnl_addattr32(&req->nlh, size, CTA_STATUS_MASK, + htonl(filter_dump->status.mask)); + } } -- cgit v1.2.3