libxt_LOG.c:6:10: fatal error: linux/netfilter/xt_LOG.h: No such file or directory . #include <linux/netfilter/xt_LOG.h> ^~~~~~~~~~~~~~~~~~~~~~~~~~ Linux < 3.4 defines are in include/linux/netfilter_ipv{4,6}/ipt_LOG.h, but the naming is slightly different, so just define it here as the values are the same. https://github.com/torvalds/linux/commit/6939c33a757bd006c5e0b8b5fd429fc587a4d0f4 Signed-off-by: Thomas Devoogdt <thomas.devoogdt@xxxxxxxxx> --- extensions/libxt_LOG.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/extensions/libxt_LOG.c b/extensions/libxt_LOG.c index b6fe0b2e..beb1d40a 100644 --- a/extensions/libxt_LOG.c +++ b/extensions/libxt_LOG.c @@ -3,7 +3,27 @@ #define SYSLOG_NAMES #include <syslog.h> #include <xtables.h> +#include <linux/version.h> + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 4, 0) #include <linux/netfilter/xt_LOG.h> +#else +/* Linux < 3.4 defines are in include/linux/netfilter_ipv{4,6}/ipt_LOG.h, + but the naming is slightly different, so just define it here as the values are the same. */ +#define XT_LOG_TCPSEQ 0x01 /* Log TCP sequence numbers */ +#define XT_LOG_TCPOPT 0x02 /* Log TCP options */ +#define XT_LOG_IPOPT 0x04 /* Log IP options */ +#define XT_LOG_UID 0x08 /* Log UID owning local socket */ +#define XT_LOG_NFLOG 0x10 /* Unsupported, don't reuse */ +#define XT_LOG_MACDECODE 0x20 /* Decode MAC header */ +#define XT_LOG_MASK 0x2f + +struct xt_log_info { + unsigned char level; + unsigned char logflags; + char prefix[30]; +}; +#endif #define LOG_DEFAULT_LEVEL LOG_WARNING -- 2.39.2