Harald Welte | 487d1d3 | 2002-03-14 12:22:06 +0000 | [diff] [blame] | 1 | /* Shared library add-on to iptables for DSCP |
| 2 | * |
| 3 | * (C) 2002 by Harald Welte <laforge@gnumonks.org> |
| 4 | * |
| 5 | * This program is distributed under the terms of GNU GPL v2, 1991 |
| 6 | * |
| 7 | * libipt_dscp.c borrowed heavily from libipt_tos.c |
| 8 | * |
Iain Barnes | 0ddae8f | 2002-06-21 17:35:55 +0000 | [diff] [blame] | 9 | * --class support added by Iain Barnes |
| 10 | * |
Harald Welte | 487d1d3 | 2002-03-14 12:22:06 +0000 | [diff] [blame] | 11 | * For a list of DSCP codepoints see |
| 12 | * http://www.iana.org/assignments/dscp-registry |
| 13 | * |
| 14 | */ |
| 15 | #include <stdio.h> |
| 16 | #include <string.h> |
Yasuyuki KOZAKAI | 18e0608 | 2007-07-24 07:17:23 +0000 | [diff] [blame] | 17 | #include <xtables.h> |
Yasuyuki KOZAKAI | 18e0608 | 2007-07-24 07:17:23 +0000 | [diff] [blame] | 18 | #include <linux/netfilter/xt_dscp.h> |
Harald Welte | 487d1d3 | 2002-03-14 12:22:06 +0000 | [diff] [blame] | 19 | |
Iain Barnes | 0ddae8f | 2002-06-21 17:35:55 +0000 | [diff] [blame] | 20 | /* This is evil, but it's my code - HW*/ |
Jan Engelhardt | f82070f | 2008-01-20 13:14:00 +0000 | [diff] [blame] | 21 | #include "dscp_helper.c" |
Iain Barnes | 0ddae8f | 2002-06-21 17:35:55 +0000 | [diff] [blame] | 22 | |
Jan Engelhardt | 72c3597 | 2011-03-01 20:28:24 +0100 | [diff] [blame] | 23 | enum { |
| 24 | O_DSCP = 0, |
| 25 | O_DSCP_CLASS, |
| 26 | F_DSCP = 1 << O_DSCP, |
| 27 | F_DSCP_CLASS = 1 << O_DSCP_CLASS, |
| 28 | }; |
| 29 | |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 30 | static void dscp_help(void) |
Harald Welte | 487d1d3 | 2002-03-14 12:22:06 +0000 | [diff] [blame] | 31 | { |
| 32 | printf( |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 33 | "dscp match options\n" |
Harald Welte | 487d1d3 | 2002-03-14 12:22:06 +0000 | [diff] [blame] | 34 | "[!] --dscp value Match DSCP codepoint with numerical value\n" |
| 35 | " This value can be in decimal (ex: 32)\n" |
Iain Barnes | 0ddae8f | 2002-06-21 17:35:55 +0000 | [diff] [blame] | 36 | " or in hex (ex: 0x20)\n" |
Harald Welte | a49ded0 | 2002-08-07 09:55:37 +0000 | [diff] [blame] | 37 | "[!] --dscp-class name Match the DiffServ class. This value may\n" |
Iain Barnes | 0ddae8f | 2002-06-21 17:35:55 +0000 | [diff] [blame] | 38 | " be any of the BE,EF, AFxx or CSx classes\n" |
| 39 | "\n" |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 40 | " These two options are mutually exclusive !\n"); |
Harald Welte | 487d1d3 | 2002-03-14 12:22:06 +0000 | [diff] [blame] | 41 | } |
| 42 | |
Jan Engelhardt | 72c3597 | 2011-03-01 20:28:24 +0100 | [diff] [blame] | 43 | static const struct xt_option_entry dscp_opts[] = { |
| 44 | {.name = "dscp", .id = O_DSCP, .excl = F_DSCP_CLASS, |
| 45 | .type = XTTYPE_UINT8, .min = 0, .max = XT_DSCP_MAX, |
| 46 | .flags = XTOPT_PUT, XTOPT_POINTER(struct xt_dscp_info, dscp)}, |
| 47 | {.name = "dscp-class", .id = O_DSCP_CLASS, .excl = F_DSCP, |
| 48 | .type = XTTYPE_STRING}, |
| 49 | XTOPT_TABLEEND, |
Harald Welte | 487d1d3 | 2002-03-14 12:22:06 +0000 | [diff] [blame] | 50 | }; |
| 51 | |
Jan Engelhardt | 72c3597 | 2011-03-01 20:28:24 +0100 | [diff] [blame] | 52 | static void dscp_parse(struct xt_option_call *cb) |
Harald Welte | 487d1d3 | 2002-03-14 12:22:06 +0000 | [diff] [blame] | 53 | { |
Jan Engelhardt | 72c3597 | 2011-03-01 20:28:24 +0100 | [diff] [blame] | 54 | struct xt_dscp_info *dinfo = cb->data; |
Harald Welte | 487d1d3 | 2002-03-14 12:22:06 +0000 | [diff] [blame] | 55 | |
Jan Engelhardt | 72c3597 | 2011-03-01 20:28:24 +0100 | [diff] [blame] | 56 | xtables_option_parse(cb); |
| 57 | switch (cb->entry->id) { |
| 58 | case O_DSCP: |
| 59 | if (cb->invert) |
Harald Welte | 487d1d3 | 2002-03-14 12:22:06 +0000 | [diff] [blame] | 60 | dinfo->invert = 1; |
Harald Welte | 487d1d3 | 2002-03-14 12:22:06 +0000 | [diff] [blame] | 61 | break; |
Jan Engelhardt | 72c3597 | 2011-03-01 20:28:24 +0100 | [diff] [blame] | 62 | case O_DSCP_CLASS: |
| 63 | dinfo->dscp = class_to_dscp(cb->arg); |
| 64 | if (cb->invert) |
Iain Barnes | 0ddae8f | 2002-06-21 17:35:55 +0000 | [diff] [blame] | 65 | dinfo->invert = 1; |
Iain Barnes | 0ddae8f | 2002-06-21 17:35:55 +0000 | [diff] [blame] | 66 | break; |
Harald Welte | 487d1d3 | 2002-03-14 12:22:06 +0000 | [diff] [blame] | 67 | } |
Harald Welte | 487d1d3 | 2002-03-14 12:22:06 +0000 | [diff] [blame] | 68 | } |
| 69 | |
Jan Engelhardt | 72c3597 | 2011-03-01 20:28:24 +0100 | [diff] [blame] | 70 | static void dscp_check(struct xt_fcheck_call *cb) |
Harald Welte | 487d1d3 | 2002-03-14 12:22:06 +0000 | [diff] [blame] | 71 | { |
Jan Engelhardt | 72c3597 | 2011-03-01 20:28:24 +0100 | [diff] [blame] | 72 | if (cb->xflags == 0) |
Jan Engelhardt | 1829ed4 | 2009-02-21 03:29:44 +0100 | [diff] [blame] | 73 | xtables_error(PARAMETER_PROBLEM, |
Harald Welte | 487d1d3 | 2002-03-14 12:22:06 +0000 | [diff] [blame] | 74 | "DSCP match: Parameter --dscp is required"); |
| 75 | } |
| 76 | |
| 77 | static void |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 78 | dscp_print(const void *ip, const struct xt_entry_match *match, int numeric) |
Harald Welte | 487d1d3 | 2002-03-14 12:22:06 +0000 | [diff] [blame] | 79 | { |
Yasuyuki KOZAKAI | 18e0608 | 2007-07-24 07:17:23 +0000 | [diff] [blame] | 80 | const struct xt_dscp_info *dinfo = |
| 81 | (const struct xt_dscp_info *)match->data; |
Jan Engelhardt | 7386635 | 2010-12-18 02:04:59 +0100 | [diff] [blame] | 82 | printf(" DSCP match %s0x%02x", dinfo->invert ? "!" : "", dinfo->dscp); |
Harald Welte | 487d1d3 | 2002-03-14 12:22:06 +0000 | [diff] [blame] | 83 | } |
| 84 | |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 85 | static void dscp_save(const void *ip, const struct xt_entry_match *match) |
Harald Welte | 487d1d3 | 2002-03-14 12:22:06 +0000 | [diff] [blame] | 86 | { |
Yasuyuki KOZAKAI | 18e0608 | 2007-07-24 07:17:23 +0000 | [diff] [blame] | 87 | const struct xt_dscp_info *dinfo = |
| 88 | (const struct xt_dscp_info *)match->data; |
Harald Welte | 487d1d3 | 2002-03-14 12:22:06 +0000 | [diff] [blame] | 89 | |
Jan Engelhardt | 7386635 | 2010-12-18 02:04:59 +0100 | [diff] [blame] | 90 | printf("%s --dscp 0x%02x", dinfo->invert ? " !" : "", dinfo->dscp); |
Harald Welte | 487d1d3 | 2002-03-14 12:22:06 +0000 | [diff] [blame] | 91 | } |
| 92 | |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 93 | static struct xtables_match dscp_match = { |
Jan Engelhardt | c5e8573 | 2009-06-12 20:55:44 +0200 | [diff] [blame] | 94 | .family = NFPROTO_UNSPEC, |
Yasuyuki KOZAKAI | 18e0608 | 2007-07-24 07:17:23 +0000 | [diff] [blame] | 95 | .name = "dscp", |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 96 | .version = XTABLES_VERSION, |
Yasuyuki KOZAKAI | 18e0608 | 2007-07-24 07:17:23 +0000 | [diff] [blame] | 97 | .size = XT_ALIGN(sizeof(struct xt_dscp_info)), |
| 98 | .userspacesize = XT_ALIGN(sizeof(struct xt_dscp_info)), |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 99 | .help = dscp_help, |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 100 | .print = dscp_print, |
| 101 | .save = dscp_save, |
Jan Engelhardt | 72c3597 | 2011-03-01 20:28:24 +0100 | [diff] [blame] | 102 | .x6_parse = dscp_parse, |
| 103 | .x6_fcheck = dscp_check, |
| 104 | .x6_options = dscp_opts, |
Harald Welte | 487d1d3 | 2002-03-14 12:22:06 +0000 | [diff] [blame] | 105 | }; |
| 106 | |
| 107 | void _init(void) |
| 108 | { |
Jan Engelhardt | 181dead | 2007-10-04 16:27:07 +0000 | [diff] [blame] | 109 | xtables_register_match(&dscp_match); |
Harald Welte | 487d1d3 | 2002-03-14 12:22:06 +0000 | [diff] [blame] | 110 | } |