Add translation for options log-level and log-prefix of LOG target
to nftables.
Full translation of this target awaits the support for the options
log-tcp-sequence, log-tcp-options, log-ip-options, log-uid and
log-macdecode in nftables.
Examples:
$ sudo iptables-translate -A FORWARD -p tcp -j LOG --log-level error
nft add rule ip filter FORWARD ip protocol tcp counter log level err
$ sudo iptables-translate -A FORWARD -p tcp -j LOG --log-prefix "Random prefix"
nft add rule ip filter FORWARD ip protocol tcp counter log prefix \"Random prefix\" level warn
Signed-off-by: Shivani Bhardwaj <shivanib134@xxxxxxxxx>
---
extensions/libipt_LOG.c | 37 +++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
diff --git a/extensions/libipt_LOG.c b/extensions/libipt_LOG.c
index 77f16d1..f2beee3 100644
--- a/extensions/libipt_LOG.c
+++ b/extensions/libipt_LOG.c
@@ -63,6 +63,11 @@ struct ipt_log_names {
unsigned int level;
};
+struct ipt_log_xlate {
+ const char *name;
+ unsigned int level;
+};
+
static const struct ipt_log_names ipt_log_names[]
= { { .name = "alert", .level = LOG_ALERT },
{ .name = "crit", .level = LOG_CRIT },
@@ -166,6 +171,37 @@ static void LOG_save(const void *ip, const struct xt_entry_target *target)
printf(" --log-macdecode");
}
+static const struct ipt_log_xlate ipt_log_xlate_names[] = {
+ {"alert", LOG_ALERT },
+ {"crit", LOG_CRIT },
+ {"debug", LOG_DEBUG },
+ {"emerg", LOG_EMERG },
+ {"err", LOG_ERR },
+ {"info", LOG_INFO },
+ {"notice", LOG_NOTICE },
+ {"warn", LOG_WARNING }
+};
+
+static int LOG_xlate(const struct xt_entry_target *target,
+ struct xt_buf *buf, int numeric)
+{
+ unsigned int i = 0;
+ const struct ipt_log_info *loginfo =
+ (const struct ipt_log_info *)target->data;
+
+ xt_buf_add(buf, "log ");
+ if (strcmp(loginfo->prefix, "") != 0)
+ xt_buf_add(buf, "prefix \\\"%s\\\" ", loginfo->prefix);
+
+ for (i = 0; i < ARRAY_SIZE(ipt_log_xlate_names); ++i)
+ if (loginfo->level == ipt_log_xlate_names[i].level) {
+ xt_buf_add(buf, "level %s ",
+ ipt_log_xlate_names[i].name);
+ break;
+ }
+
+ return 1;
+}
static struct xtables_target log_tg_reg = {
.name = "LOG",
.version = XTABLES_VERSION,
@@ -178,6 +214,7 @@ static struct xtables_target log_tg_reg = {
.save = LOG_save,
.x6_parse = LOG_parse,
.x6_options = LOG_opts,
+ .xlate = LOG_xlate,
};
void _init(void)
--
1.9.1
--
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