Yasuyuki KOZAKAI | 9ea637d | 2007-07-24 07:21:17 +0000 | [diff] [blame] | 1 | /* Shared library add-on to iptables to add comment match support. |
| 2 | * |
| 3 | * ChangeLog |
| 4 | * 2003-05-13: Brad Fisher <brad@info-link.net> |
| 5 | * Initial comment match |
| 6 | * 2004-05-12: Brad Fisher <brad@info-link.net> |
| 7 | * Port to patch-o-matic-ng |
| 8 | */ |
| 9 | #include <stdio.h> |
Yasuyuki KOZAKAI | 9ea637d | 2007-07-24 07:21:17 +0000 | [diff] [blame] | 10 | #include <xtables.h> |
| 11 | #include <linux/netfilter/xt_comment.h> |
| 12 | |
Jan Engelhardt | cc2511e | 2011-03-01 20:16:22 +0100 | [diff] [blame] | 13 | enum { |
| 14 | O_COMMENT = 0, |
| 15 | }; |
| 16 | |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 17 | static void comment_help(void) |
Yasuyuki KOZAKAI | 9ea637d | 2007-07-24 07:21:17 +0000 | [diff] [blame] | 18 | { |
| 19 | printf( |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 20 | "comment match options:\n" |
| 21 | "--comment COMMENT Attach a comment to a rule\n"); |
Yasuyuki KOZAKAI | 9ea637d | 2007-07-24 07:21:17 +0000 | [diff] [blame] | 22 | } |
| 23 | |
Jan Engelhardt | cc2511e | 2011-03-01 20:16:22 +0100 | [diff] [blame] | 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, |
Yasuyuki KOZAKAI | 9ea637d | 2007-07-24 07:21:17 +0000 | [diff] [blame] | 29 | }; |
| 30 | |
| 31 | static void |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 32 | comment_print(const void *ip, const struct xt_entry_match *match, int numeric) |
Yasuyuki KOZAKAI | 9ea637d | 2007-07-24 07:21:17 +0000 | [diff] [blame] | 33 | { |
Jan Engelhardt | 69f564e | 2009-05-26 13:14:06 +0200 | [diff] [blame] | 34 | struct xt_comment_info *commentinfo = (void *)match->data; |
Yasuyuki KOZAKAI | 9ea637d | 2007-07-24 07:21:17 +0000 | [diff] [blame] | 35 | |
| 36 | commentinfo->comment[XT_MAX_COMMENT_LEN-1] = '\0'; |
Jan Engelhardt | 7386635 | 2010-12-18 02:04:59 +0100 | [diff] [blame] | 37 | printf(" /* %s */", commentinfo->comment); |
Yasuyuki KOZAKAI | 9ea637d | 2007-07-24 07:21:17 +0000 | [diff] [blame] | 38 | } |
| 39 | |
| 40 | /* Saves the union ipt_matchinfo in parsable form to stdout. */ |
| 41 | static void |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 42 | comment_save(const void *ip, const struct xt_entry_match *match) |
Yasuyuki KOZAKAI | 9ea637d | 2007-07-24 07:21:17 +0000 | [diff] [blame] | 43 | { |
Jan Engelhardt | 69f564e | 2009-05-26 13:14:06 +0200 | [diff] [blame] | 44 | struct xt_comment_info *commentinfo = (void *)match->data; |
Yasuyuki KOZAKAI | 9ea637d | 2007-07-24 07:21:17 +0000 | [diff] [blame] | 45 | |
| 46 | commentinfo->comment[XT_MAX_COMMENT_LEN-1] = '\0'; |
Jan Engelhardt | 7386635 | 2010-12-18 02:04:59 +0100 | [diff] [blame] | 47 | printf(" --comment"); |
Jan Engelhardt | 4a1d810 | 2010-12-26 10:31:03 +0100 | [diff] [blame] | 48 | xtables_save_string(commentinfo->comment); |
Yasuyuki KOZAKAI | 9ea637d | 2007-07-24 07:21:17 +0000 | [diff] [blame] | 49 | } |
| 50 | |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 51 | static struct xtables_match comment_match = { |
Jan Engelhardt | c5e8573 | 2009-06-12 20:55:44 +0200 | [diff] [blame] | 52 | .family = NFPROTO_UNSPEC, |
Yasuyuki KOZAKAI | 9ea637d | 2007-07-24 07:21:17 +0000 | [diff] [blame] | 53 | .name = "comment", |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 54 | .version = XTABLES_VERSION, |
Yasuyuki KOZAKAI | 9ea637d | 2007-07-24 07:21:17 +0000 | [diff] [blame] | 55 | .size = XT_ALIGN(sizeof(struct xt_comment_info)), |
| 56 | .userspacesize = XT_ALIGN(sizeof(struct xt_comment_info)), |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 57 | .help = comment_help, |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 58 | .print = comment_print, |
| 59 | .save = comment_save, |
Jan Engelhardt | cc2511e | 2011-03-01 20:16:22 +0100 | [diff] [blame] | 60 | .x6_parse = xtables_option_parse, |
| 61 | .x6_options = comment_opts, |
Yasuyuki KOZAKAI | 9ea637d | 2007-07-24 07:21:17 +0000 | [diff] [blame] | 62 | }; |
| 63 | |
| 64 | void _init(void) |
| 65 | { |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 66 | xtables_register_match(&comment_match); |
Yasuyuki KOZAKAI | 9ea637d | 2007-07-24 07:21:17 +0000 | [diff] [blame] | 67 | } |