From defc7bd2bac89aab8f12929f264241e4583ec21c Mon Sep 17 00:00:00 2001 From: Shivani Bhardwaj Date: Thu, 3 Mar 2016 00:58:48 +0530 Subject: extensions: libxt_sctp: Add translation to nft Add translation for sctp to nftables. Full translation of this match awaits the support for --chunk-types option. Examples: $ sudo iptables-translate -A INPUT -p sctp --dport 80 -j DROP nft add rule ip filter INPUT sctp dport 80 counter drop $ sudo iptables-translate -A INPUT -p sctp ! --sport 80:100 -j ACCEPT nft add rule ip filter INPUT sctp sport != 80-100 counter accept Signed-off-by: Shivani Bhardwaj Signed-off-by: Pablo Neira Ayuso --- extensions/libxt_sctp.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/extensions/libxt_sctp.c b/extensions/libxt_sctp.c index 56a4cdf2..3b0b0486 100644 --- a/extensions/libxt_sctp.c +++ b/extensions/libxt_sctp.c @@ -485,6 +485,42 @@ static void sctp_save(const void *ip, const struct xt_entry_match *match) } } +static int sctp_xlate(const struct xt_entry_match *match, + struct xt_xlate *xl, int numeric) +{ + const struct xt_sctp_info *einfo = + (const struct xt_sctp_info *)match->data; + + if (!einfo->flags) + return 0; + + xt_xlate_add(xl, "sctp "); + + if (einfo->flags & XT_SCTP_SRC_PORTS) { + if (einfo->spts[0] != einfo->spts[1]) + xt_xlate_add(xl, "sport%s %u-%u ", + einfo->invflags & XT_SCTP_SRC_PORTS ? " !=" : "", + einfo->spts[0], einfo->spts[1]); + else + xt_xlate_add(xl, "sport%s %u ", + einfo->invflags & XT_SCTP_SRC_PORTS ? " !=" : "", + einfo->spts[0]); + } + + if (einfo->flags & XT_SCTP_DEST_PORTS) { + if (einfo->dpts[0] != einfo->dpts[1]) + xt_xlate_add(xl, "dport%s %u-%u ", + einfo->invflags & XT_SCTP_DEST_PORTS ? " !=" : "", + einfo->dpts[0], einfo->dpts[1]); + else + xt_xlate_add(xl, "dport%s %u ", + einfo->invflags & XT_SCTP_DEST_PORTS ? " !=" : "", + einfo->dpts[0]); + } + + return 1; +} + static struct xtables_match sctp_match = { .name = "sctp", .family = NFPROTO_UNSPEC, @@ -497,6 +533,7 @@ static struct xtables_match sctp_match = { .print = sctp_print, .save = sctp_save, .extra_opts = sctp_opts, + .xlate = sctp_xlate, }; void _init(void) -- cgit v1.2.3