/* Shared library add-on to iptables to add comment match support.
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*
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* ChangeLog
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* 2003-05-13: Brad Fisher <brad@info-link.net>
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* Initial comment match
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* 2004-05-12: Brad Fisher <brad@info-link.net>
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* Port to patch-o-matic-ng
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*/
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#include <stdio.h>
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#include <xtables.h>
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#include <linux/netfilter/xt_comment.h>
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enum {
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O_COMMENT = 0,
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};
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static void comment_help(void)
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{
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printf(
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"comment match options:\n"
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"--comment COMMENT Attach a comment to a rule\n");
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}
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static const struct xt_option_entry comment_opts[] = {
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{.name = "comment", .id = O_COMMENT, .type = XTTYPE_STRING,
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.flags = XTOPT_MAND | XTOPT_PUT,
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XTOPT_POINTER(struct xt_comment_info, comment)},
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XTOPT_TABLEEND,
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};
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static void
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comment_print(const void *ip, const struct xt_entry_match *match, int numeric)
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{
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struct xt_comment_info *commentinfo = (void *)match->data;
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commentinfo->comment[XT_MAX_COMMENT_LEN-1] = '\0';
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printf(" /* %s */", commentinfo->comment);
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}
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/* Saves the union ipt_matchinfo in parsable form to stdout. */
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static void
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comment_save(const void *ip, const struct xt_entry_match *match)
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{
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struct xt_comment_info *commentinfo = (void *)match->data;
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commentinfo->comment[XT_MAX_COMMENT_LEN-1] = '\0';
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printf(" --comment");
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xtables_save_string(commentinfo->comment);
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}
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static int comment_xlate(struct xt_xlate *xl,
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const struct xt_xlate_mt_params *params)
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{
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struct xt_comment_info *commentinfo = (void *)params->match->data;
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char comment[XT_MAX_COMMENT_LEN];
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commentinfo->comment[XT_MAX_COMMENT_LEN - 1] = '\0';
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if (params->escape_quotes)
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snprintf(comment, XT_MAX_COMMENT_LEN, "\\\"%s\\\"",
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commentinfo->comment);
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else
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snprintf(comment, XT_MAX_COMMENT_LEN, "\"%s\"",
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commentinfo->comment);
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comment[XT_MAX_COMMENT_LEN - 1] = '\0';
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xt_xlate_add_comment(xl, comment);
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return 1;
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}
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static struct xtables_match comment_match = {
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.family = NFPROTO_UNSPEC,
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.name = "comment",
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.version = XTABLES_VERSION,
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.size = XT_ALIGN(sizeof(struct xt_comment_info)),
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.userspacesize = XT_ALIGN(sizeof(struct xt_comment_info)),
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.help = comment_help,
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.print = comment_print,
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.save = comment_save,
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.x6_parse = xtables_option_parse,
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.x6_options = comment_opts,
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.xlate = comment_xlate,
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};
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void _init(void)
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{
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xtables_register_match(&comment_match);
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}
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