Add translation for match comment to nftables. Example:
$ sudo iptables-translate -A INPUT -s 192.168.0.0 -m comment --comment "A privatized IP block" nft add rule ip filter INPUT ip saddr 192.168.0.0 counter comment \"A privatized IP block\" Signed-off-by: Shivani Bhardwaj <[email protected]> --- extensions/libxt_comment.c | 13 +++++++++++++ iptables/nft-ipv4.c | 17 +++++++++++++++-- 2 files changed, 28 insertions(+), 2 deletions(-) diff --git a/extensions/libxt_comment.c b/extensions/libxt_comment.c index 6ed2ff9..e80336c 100644 --- a/extensions/libxt_comment.c +++ b/extensions/libxt_comment.c @@ -48,6 +48,18 @@ comment_save(const void *ip, const struct xt_entry_match *match) xtables_save_string(commentinfo->comment); } +static int +comment_xlate(const struct xt_entry_match *match, + struct xt_buf *buf, int numeric) +{ + struct xt_comment_info *commentinfo = (void *)match->data; + + commentinfo->comment[XT_MAX_COMMENT_LEN-1] = '\0'; + xt_buf_add(buf, "comment \\\"%s\\\" ", commentinfo->comment); + + return 1; +} + static struct xtables_match comment_match = { .family = NFPROTO_UNSPEC, .name = "comment", @@ -59,6 +71,7 @@ static struct xtables_match comment_match = { .save = comment_save, .x6_parse = xtables_option_parse, .x6_options = comment_opts, + .xlate = comment_xlate, }; void _init(void) diff --git a/iptables/nft-ipv4.c b/iptables/nft-ipv4.c index ede8f17..612b4f6 100644 --- a/iptables/nft-ipv4.c +++ b/iptables/nft-ipv4.c @@ -433,6 +433,7 @@ static int nft_ipv4_xlate(const void *data, struct xt_buf *buf) { const struct iptables_command_state *cs = data; int ret; + bool comm = false; if (cs->fw.ip.iniface[0] != '\0') { xt_buf_add(buf, "iifname %s%s ", @@ -477,12 +478,24 @@ static int nft_ipv4_xlate(const void *data, struct xt_buf *buf) inet_ntoa(cs->fw.ip.dst)); } + /* + * Add counter for match comment as prefix + */ + if (strcmp(cs->matches->match->name, "comment") == 0) { + comm = true; + xt_buf_add(buf, "counter "); + } + ret = xlate_matches(cs, buf); if (!ret) return ret; - /* Always add counters per rule, as in iptables */ - xt_buf_add(buf, "counter "); + /* + * Always add counters per rule, as in iptables + * except for the match comment + */ + if (!comm) + xt_buf_add(buf, "counter "); ret = xlate_action(cs, !!(cs->fw.ip.flags & IPT_F_GOTO), buf); -- 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
