1 /* Shared library add-on to iptables to add comment match support. 2 * 3 * ChangeLog 4 * 2003-05-13: Brad Fisher <brad (at) info-link.net> 5 * Initial comment match 6 * 2004-05-12: Brad Fisher <brad (at) info-link.net> 7 * Port to patch-o-matic-ng 8 */ 9 #include <stdio.h> 10 #include <xtables.h> 11 #include <linux/netfilter/xt_comment.h> 12 13 enum { 14 O_COMMENT = 0, 15 }; 16 17 static void comment_help(void) 18 { 19 printf( 20 "comment match options:\n" 21 "--comment COMMENT Attach a comment to a rule\n"); 22 } 23 24 static const struct xt_option_entry comment_opts[] = { 25 {.name = "comment", .id = O_COMMENT, .type = XTTYPE_STRING, 26 .flags = XTOPT_MAND | XTOPT_PUT, 27 XTOPT_POINTER(struct xt_comment_info, comment)}, 28 XTOPT_TABLEEND, 29 }; 30 31 static void 32 comment_print(const void *ip, const struct xt_entry_match *match, int numeric) 33 { 34 struct xt_comment_info *commentinfo = (void *)match->data; 35 36 commentinfo->comment[XT_MAX_COMMENT_LEN-1] = '\0'; 37 printf(" /* %s */", commentinfo->comment); 38 } 39 40 /* Saves the union ipt_matchinfo in parsable form to stdout. */ 41 static void 42 comment_save(const void *ip, const struct xt_entry_match *match) 43 { 44 struct xt_comment_info *commentinfo = (void *)match->data; 45 46 commentinfo->comment[XT_MAX_COMMENT_LEN-1] = '\0'; 47 printf(" --comment"); 48 xtables_save_string(commentinfo->comment); 49 } 50 51 static struct xtables_match comment_match = { 52 .family = NFPROTO_UNSPEC, 53 .name = "comment", 54 .version = XTABLES_VERSION, 55 .size = XT_ALIGN(sizeof(struct xt_comment_info)), 56 .userspacesize = XT_ALIGN(sizeof(struct xt_comment_info)), 57 .help = comment_help, 58 .print = comment_print, 59 .save = comment_save, 60 .x6_parse = xtables_option_parse, 61 .x6_options = comment_opts, 62 }; 63 64 void _init(void) 65 { 66 xtables_register_match(&comment_match); 67 } 68
