From a3ea8922338e7a3cf405255204f82494623d01e3 Mon Sep 17 00:00:00 2001 From: Shivani Bhardwaj Date: Tue, 5 Jan 2016 23:32:29 +0530 Subject: extensions: libipt_LOG: Add translation to nft 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 Signed-off-by: Pablo Neira Ayuso --- extensions/libipt_LOG.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/extensions/libipt_LOG.c b/extensions/libipt_LOG.c index 77f16d19..f2beee38 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) -- cgit v1.2.3