Iptables standard targets like DROP or REJECT don't implement the print
callback in libxtables. Hence the following command would segfault:
| tc filter add dev d0 parent ffff: u32 match u32 0 0 action xt -j DROP
With this patch standard targets still can't be used (and are not really
useful anyway), but at least it doesn't crash anymore.
Signed-off-by: Phil Sutter <p...@nwl.cc>
---
tc/m_xt.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/tc/m_xt.c b/tc/m_xt.c
index c3f866df14749..62ec6d7f18e73 100644
--- a/tc/m_xt.c
+++ b/tc/m_xt.c
@@ -250,8 +250,12 @@ static int parse_ipt(struct action_util *a, int *argc_p,
fprintf(stdout, "tablename: %s hook: %s\n ", tname, ipthooks[hook]);
fprintf(stdout, "\ttarget: ");
- if (m)
- m->print(NULL, m->t, 0);
+ if (m) {
+ if (m->print)
+ m->print(NULL, m->t, 0);
+ else
+ printf("%s ", m->name);
+ }
fprintf(stdout, " index %d\n", index);
if (strlen(tname) > 16) {
--
2.8.2
