From 924ab13fb48eb45b5f41fb8cfc897e7eafaa11b8 Mon Sep 17 00:00:00 2001 From: Shivani Bhardwaj Date: Wed, 23 Dec 2015 20:14:02 +0530 Subject: extensions: libxt_devgroup: Add translation to nft Add translation for device group to nftables. Examples: $ sudo iptables-translate -A FORWARD -m devgroup --src-group 0x2 -j ACCEPT nft add rule ip filter FORWARD iifgroup 0x2 counter accept $ sudo iptables-translate -A FORWARD -m devgroup --dst-group 0xc/0xc -j ACCEPT nft add rule ip filter FORWARD oifgroup and 0xc == 0xc counter accept $ sudo iptables-translate -t mangle -A PREROUTING -p tcp --dport 46000 -m devgroup --src-group 23 -j ACCEPT nft add rule ip mangle PREROUTING tcp dport 46000 iifgroup 0x17 counter accept $ sudo iptables-translate -A FORWARD -m devgroup ! --dst-group 0xc/0xc -j ACCEPT nft add rule ip filter FORWARD oifgroup and 0xc != 0xc counter accept $ sudo iptables-translate -A FORWARD -m devgroup ! --src-group 0x2 -j ACCEPT nft add rule ip filter FORWARD iifgroup != 0x2 counter accept Signed-off-by : Shivani Bhardwaj Signed-off-by: Pablo Neira Ayuso --- extensions/libxt_devgroup.c | 53 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) (limited to 'extensions/libxt_devgroup.c') diff --git a/extensions/libxt_devgroup.c b/extensions/libxt_devgroup.c index 1a526273..645f2f31 100644 --- a/extensions/libxt_devgroup.c +++ b/extensions/libxt_devgroup.c @@ -151,6 +151,58 @@ static void devgroup_check(struct xt_fcheck_call *cb) "'--src-group' or '--dst-group'"); } +static void +print_devgroup_xlate(unsigned int id, uint32_t op, unsigned int mask, + struct xt_buf *buf, int numeric) +{ + const char *name = NULL; + + if (mask != 0xffffffff) + xt_buf_add(buf, "and 0x%x %s 0x%x ", id, + op == XT_OP_EQ ? "==" : "!=", mask); + else { + if (numeric == 0) + name = xtables_lmap_id2name(devgroups, id); + if (name) + xt_buf_add(buf, "%s ", name); + else + xt_buf_add(buf, "%s0x%x ", + op == XT_OP_EQ ? "" : "!= ", id); + } +} + +static void devgroup_show_xlate(const struct xt_devgroup_info *info, + struct xt_buf *buf, int numeric) +{ + enum xt_op op = XT_OP_EQ; + + if (info->flags & XT_DEVGROUP_MATCH_SRC) { + if (info->flags & XT_DEVGROUP_INVERT_SRC) + op = XT_OP_NEQ; + xt_buf_add(buf, "iifgroup "); + print_devgroup_xlate(info->src_group, op, + info->src_mask, buf, numeric); + } + + if (info->flags & XT_DEVGROUP_MATCH_DST) { + if (info->flags & XT_DEVGROUP_INVERT_DST) + op = XT_OP_NEQ; + xt_buf_add(buf, "oifgroup "); + print_devgroup_xlate(info->dst_group, op, + info->dst_mask, buf, numeric); + } +} + +static int devgroup_xlate(const struct xt_entry_match *match, + struct xt_buf *buf, int numeric) +{ + const struct xt_devgroup_info *info = (const void *)match->data; + + devgroup_show_xlate(info, buf, 0); + + return 1; +} + static struct xtables_match devgroup_mt_reg = { .name = "devgroup", .version = XTABLES_VERSION, @@ -164,6 +216,7 @@ static struct xtables_match devgroup_mt_reg = { .x6_parse = devgroup_parse, .x6_fcheck = devgroup_check, .x6_options = devgroup_opts, + .xlate = devgroup_xlate, }; void _init(void) -- cgit v1.2.3