netdev - [iproute PATCH 2/2] ss: Fix accidental state filter override

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Date:	Wed, 13 Apr 2016 22:07:05 +0200
From:	Phil Sutter <phil@....cc>
To:	Stephen Hemminger <shemming@...cade.com>
Cc:	Vadim Kochan <vadim4j@...il.com>, netdev@...r.kernel.org
Subject: [iproute PATCH 2/2] ss: Fix accidental state filter override

Passing a filter expression and selecting an address family using the
'-f' flag would overwrite the state filter by accident. Therefore
calling e.g. 'ss -nl -f inet '(sport = :22)' would not only print
listening sockets (as requested by '-l' flag) but connected ones, as
well.

Fix this by reusing the formerly ineffective call to filter_states_set()
to restore the state filter as it was before the call to
filter_af_set().

Signed-off-by: Phil Sutter <phil@....cc>
---
 misc/ss.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/misc/ss.c b/misc/ss.c
index d6090018c5dbb..544def3f08ea8 100644
--- a/misc/ss.c
+++ b/misc/ss.c
@@ -1556,9 +1556,10 @@ void *parse_hostcond(char *addr, bool is_port)

 out:
 	if (fam != AF_UNSPEC) {
+		int states = f->states;
 		f->families = 0;
 		filter_af_set(f, fam);
-		filter_states_set(f, 0);
+		filter_states_set(f, states);
 	}

 	res = malloc(sizeof(*res));
-- 
2.8.0