Add translation for module owner to nftables. Full translation of this match awaits the support for --socket-exists option.
Examples: $ sudo iptables-translate -t nat -A OUTPUT -p tcp --dport 80 -m owner --uid-owner root -j ACCEPT nft add rule ip nat OUTPUT tcp dport 80 skuid 0 counter accept $ sudo iptables-translate -t nat -A OUTPUT -p tcp --dport 80 -m owner --gid-owner 0-10 -j ACCEPT nft add rule ip nat OUTPUT tcp dport 80 skgid 0-10 counter accept $ sudo iptables-translate -t nat -A OUTPUT -p tcp --dport 80 -m owner ! --uid-owner shivani -j ACCEPT nft add rule ip nat OUTPUT tcp dport 80 skuid != 1000 counter accept Signed-off-by: Shivani Bhardwaj <[email protected]> --- Changes in v2: Add different functions for skuid and skgid extensions/libxt_owner.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) diff --git a/extensions/libxt_owner.c b/extensions/libxt_owner.c index d9adc12..2085de8 100644 --- a/extensions/libxt_owner.c +++ b/extensions/libxt_owner.c @@ -492,6 +492,56 @@ static void owner_mt_save(const void *ip, const struct xt_entry_match *match) owner_mt_print_item(info, "--gid-owner", XT_OWNER_GID, true); } +static int +owner_mt_print_uid_xlate(const struct xt_owner_match_info *info, + struct xt_xlate *xl) +{ + xt_xlate_add(xl, "skuid%s ", info->invert ? " !=" : ""); + + if (info->uid_min != info->uid_max) + xt_xlate_add(xl, "%u-%u ", (unsigned int)info->uid_min, + (unsigned int)info->uid_max); + else + xt_xlate_add(xl, "%u ", (unsigned int)info->uid_min); + + return 1; +} + +static int +owner_mt_print_gid_xlate(const struct xt_owner_match_info *info, + struct xt_xlate *xl) +{ + xt_xlate_add(xl, "skgid%s ", info->invert ? " !=" : ""); + + if (info->gid_min != info->gid_max) + xt_xlate_add(xl, "%u-%u ", (unsigned int)info->gid_min, + (unsigned int)info->gid_max); + else + xt_xlate_add(xl, "%u ", (unsigned int)info->gid_min); + + return 1; +} + +static int owner_mt_xlate(const struct xt_entry_match *match, + struct xt_xlate *xl, int numeric) +{ + const struct xt_owner_match_info *info = (void *)match->data; + int ret; + + switch (info->match) { + case XT_OWNER_UID: + ret = owner_mt_print_uid_xlate(info, xl); + break; + case XT_OWNER_GID: + ret = owner_mt_print_gid_xlate(info, xl); + break; + default: + ret = 0; + } + + return ret; +} + static struct xtables_match owner_mt_reg[] = { { .version = XTABLES_VERSION, @@ -534,6 +584,7 @@ static struct xtables_match owner_mt_reg[] = { .print = owner_mt_print, .save = owner_mt_save, .x6_options = owner_mt_opts, + .xlate = owner_mt_xlate, }, }; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
