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88 lines
2.3 KiB
88 lines
2.3 KiB
/* 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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