diff options
Diffstat (limited to 'extensions/libxt_TCPOPTSTRIP.c')
| -rw-r--r-- | extensions/libxt_TCPOPTSTRIP.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/extensions/libxt_TCPOPTSTRIP.c b/extensions/libxt_TCPOPTSTRIP.c index 6ea34892..ff873f98 100644 --- a/extensions/libxt_TCPOPTSTRIP.c +++ b/extensions/libxt_TCPOPTSTRIP.c @@ -142,6 +142,13 @@ tcpoptstrip_print_list(const struct xt_tcpoptstrip_target_info *info, } } +static bool tcpoptstrip_empty(const struct xt_tcpoptstrip_target_info *info) +{ + static const struct xt_tcpoptstrip_target_info empty = {}; + + return memcmp(info, &empty, sizeof(empty)) == 0; +} + static void tcpoptstrip_tg_print(const void *ip, const struct xt_entry_target *target, int numeric) @@ -149,6 +156,9 @@ tcpoptstrip_tg_print(const void *ip, const struct xt_entry_target *target, const struct xt_tcpoptstrip_target_info *info = (const void *)target->data; + if (tcpoptstrip_empty(info)) + return; + printf(" TCPOPTSTRIP options "); tcpoptstrip_print_list(info, numeric); } @@ -159,6 +169,9 @@ tcpoptstrip_tg_save(const void *ip, const struct xt_entry_target *target) const struct xt_tcpoptstrip_target_info *info = (const void *)target->data; + if (tcpoptstrip_empty(info)) + return; + printf(" --strip-options "); tcpoptstrip_print_list(info, true); } |