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-rw-r--r--extensions/libct_proto_tcp.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/extensions/libct_proto_tcp.c b/extensions/libct_proto_tcp.c
index cb573d0..0b43bf5 100644
--- a/extensions/libct_proto_tcp.c
+++ b/extensions/libct_proto_tcp.c
@@ -82,7 +82,8 @@ static const char *tcp_states[TCP_CONNTRACK_MAX] = {
[TCP_CONNTRACK_LAST_ACK] = "LAST_ACK",
[TCP_CONNTRACK_TIME_WAIT] = "TIME_WAIT",
[TCP_CONNTRACK_CLOSE] = "CLOSE",
- [TCP_CONNTRACK_LISTEN] = "LISTEN"
+ /* Since Linux kernel 2.6.31, LISTEN is SYN_SENT2. */
+ [TCP_CONNTRACK_SYN_SENT2] = "SYN_SENT2"
};
static void help(void)
@@ -151,7 +152,11 @@ static int parse_options(char c,
break;
}
}
- if (i == TCP_CONNTRACK_MAX)
+ /* For backward compatibility with Linux kernel < 2.6.31. */
+ if (strcmp(optarg, "LISTEN") == 0) {
+ nfct_set_attr_u8(ct, ATTR_TCP_STATE,
+ TCP_CONNTRACK_LISTEN);
+ } else if (i == TCP_CONNTRACK_MAX)
exit_error(PARAMETER_PROBLEM,
"unknown TCP state `%s'", optarg);
*flags |= CT_TCP_STATE;