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]> --- extensions/libxt_owner.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) diff --git a/extensions/libxt_owner.c b/extensions/libxt_owner.c index d9adc12..d81080a 100644 --- a/extensions/libxt_owner.c +++ b/extensions/libxt_owner.c @@ -492,6 +492,62 @@ 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 void +owner_mt_print_item_xlate(const struct xt_owner_match_info *info, + const char *label, uint8_t flag, + struct xt_xlate *xl, bool numeric) +{ + if (!(info->match & flag)) + return; + + xt_xlate_add(xl, "%s%s", label, info->invert & flag ? "!= " : ""); + + switch (info->match & flag) { + case XT_OWNER_UID: + if (info->uid_min != info->uid_max) { + xt_xlate_add(xl, "%u-%u ", (unsigned int)info->uid_min, + (unsigned int)info->uid_max); + break; + } else if (!numeric) { + const struct passwd *pwd = getpwuid(info->uid_min); + + if (pwd != NULL && pwd->pw_name != NULL) { + xt_xlate_add(xl, " %s", pwd->pw_name); + break; + } + } + xt_xlate_add(xl, "%u ", (unsigned int)info->uid_min); + break; + + case XT_OWNER_GID: + if (info->gid_min != info->gid_max) { + xt_xlate_add(xl, "%u-%u ", (unsigned int)info->gid_min, + (unsigned int)info->gid_max); + break; + } else if (!numeric) { + const struct group *grp = getgrgid(info->gid_min); + + if (grp != NULL && grp->gr_name != NULL) { + xt_xlate_add(xl, "%s ", grp->gr_name); + break; + } + } + xt_xlate_add(xl, "%u ", (unsigned int)info->gid_min); + break; + } +} + +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; + + owner_mt_print_item_xlate(info, "skuid ", XT_OWNER_UID, xl, true); + owner_mt_print_item_xlate(info, "skgid ", XT_OWNER_GID, xl, true); + + return 1; +} + static struct xtables_match owner_mt_reg[] = { { .version = XTABLES_VERSION, @@ -534,6 +590,7 @@ 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
