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@nwl.cc>

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));