Harald Welte | 2e7377d | 2002-02-17 19:54:42 +0000 | [diff] [blame] | 1 | /* Shared library add-on to iptables for DSCP |
| 2 | * |
| 3 | * (C) 2000- 2002 by Matthew G. Marsh <mgm@paktronix.com>, |
| 4 | * Harald Welte <laforge@gnumonks.org> |
| 5 | * |
| 6 | * This program is distributed under the terms of GNU GPL v2, 1991 |
| 7 | * |
| 8 | * libipt_DSCP.c borrowed heavily from libipt_TOS.c |
| 9 | * |
Iain Barnes | df5e13f | 2002-04-11 10:48:53 +0000 | [diff] [blame] | 10 | * --set-class added by Iain Barnes |
Harald Welte | 2e7377d | 2002-02-17 19:54:42 +0000 | [diff] [blame] | 11 | */ |
| 12 | #include <stdio.h> |
| 13 | #include <string.h> |
Yasuyuki KOZAKAI | a7bf6d0 | 2007-08-04 08:24:29 +0000 | [diff] [blame] | 14 | #include <xtables.h> |
Yasuyuki KOZAKAI | a7bf6d0 | 2007-08-04 08:24:29 +0000 | [diff] [blame] | 15 | #include <linux/netfilter/xt_DSCP.h> |
Harald Welte | 2e7377d | 2002-02-17 19:54:42 +0000 | [diff] [blame] | 16 | |
Iain Barnes | 0ddae8f | 2002-06-21 17:35:55 +0000 | [diff] [blame] | 17 | /* This is evil, but it's my code - HW*/ |
Jan Engelhardt | f82070f | 2008-01-20 13:14:00 +0000 | [diff] [blame] | 18 | #include "dscp_helper.c" |
Iain Barnes | df5e13f | 2002-04-11 10:48:53 +0000 | [diff] [blame] | 19 | |
Jan Engelhardt | 72c3597 | 2011-03-01 20:28:24 +0100 | [diff] [blame] | 20 | enum { |
| 21 | O_SET_DSCP = 0, |
| 22 | O_SET_DSCP_CLASS, |
| 23 | F_SET_DSCP = 1 << O_SET_DSCP, |
| 24 | F_SET_DSCP_CLASS = 1 << O_SET_DSCP_CLASS, |
| 25 | }; |
| 26 | |
Jan Engelhardt | 932e648 | 2007-10-04 16:27:30 +0000 | [diff] [blame] | 27 | static void DSCP_help(void) |
Harald Welte | 2e7377d | 2002-02-17 19:54:42 +0000 | [diff] [blame] | 28 | { |
| 29 | printf( |
| 30 | "DSCP target options\n" |
| 31 | " --set-dscp value Set DSCP field in packet header to value\n" |
| 32 | " This value can be in decimal (ex: 32)\n" |
| 33 | " or in hex (ex: 0x20)\n" |
Harald Welte | a49ded0 | 2002-08-07 09:55:37 +0000 | [diff] [blame] | 34 | " --set-dscp-class class Set the DSCP field in packet header to the\n" |
| 35 | " value represented by the DiffServ class value.\n" |
Maciej Soltysiak | 920463d | 2004-03-04 00:14:03 +0000 | [diff] [blame] | 36 | " This class may be EF,BE or any of the CSxx\n" |
Iain Barnes | df5e13f | 2002-04-11 10:48:53 +0000 | [diff] [blame] | 37 | " or AFxx classes.\n" |
| 38 | "\n" |
| 39 | " These two options are mutually exclusive !\n" |
Harald Welte | 2e7377d | 2002-02-17 19:54:42 +0000 | [diff] [blame] | 40 | ); |
| 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 = "set-dscp", .id = O_SET_DSCP, .excl = F_SET_DSCP_CLASS, |
| 45 | .type = XTTYPE_UINT8, .min = 0, .max = XT_DSCP_MAX, |
| 46 | .flags = XTOPT_PUT, |
| 47 | XTOPT_POINTER(struct xt_DSCP_info, dscp)}, |
| 48 | {.name = "set-dscp-class", .id = O_SET_DSCP_CLASS, .excl = F_SET_DSCP, |
| 49 | .type = XTTYPE_STRING}, |
| 50 | XTOPT_TABLEEND, |
Harald Welte | 2e7377d | 2002-02-17 19:54:42 +0000 | [diff] [blame] | 51 | }; |
| 52 | |
Jan Engelhardt | 72c3597 | 2011-03-01 20:28:24 +0100 | [diff] [blame] | 53 | static void DSCP_parse(struct xt_option_call *cb) |
Harald Welte | 2e7377d | 2002-02-17 19:54:42 +0000 | [diff] [blame] | 54 | { |
Jan Engelhardt | 72c3597 | 2011-03-01 20:28:24 +0100 | [diff] [blame] | 55 | struct xt_DSCP_info *dinfo = cb->data; |
Harald Welte | 2e7377d | 2002-02-17 19:54:42 +0000 | [diff] [blame] | 56 | |
Jan Engelhardt | 72c3597 | 2011-03-01 20:28:24 +0100 | [diff] [blame] | 57 | xtables_option_parse(cb); |
| 58 | switch (cb->entry->id) { |
| 59 | case O_SET_DSCP_CLASS: |
| 60 | dinfo->dscp = class_to_dscp(cb->arg); |
Iain Barnes | df5e13f | 2002-04-11 10:48:53 +0000 | [diff] [blame] | 61 | break; |
Harald Welte | 2e7377d | 2002-02-17 19:54:42 +0000 | [diff] [blame] | 62 | } |
Harald Welte | 2e7377d | 2002-02-17 19:54:42 +0000 | [diff] [blame] | 63 | } |
| 64 | |
Jan Engelhardt | 72c3597 | 2011-03-01 20:28:24 +0100 | [diff] [blame] | 65 | static void DSCP_check(struct xt_fcheck_call *cb) |
Harald Welte | 2e7377d | 2002-02-17 19:54:42 +0000 | [diff] [blame] | 66 | { |
Jan Engelhardt | 72c3597 | 2011-03-01 20:28:24 +0100 | [diff] [blame] | 67 | if (cb->xflags == 0) |
Jan Engelhardt | 1829ed4 | 2009-02-21 03:29:44 +0100 | [diff] [blame] | 68 | xtables_error(PARAMETER_PROBLEM, |
Harald Welte | 2e7377d | 2002-02-17 19:54:42 +0000 | [diff] [blame] | 69 | "DSCP target: Parameter --set-dscp is required"); |
| 70 | } |
| 71 | |
| 72 | static void |
Jan Engelhardt | 7ac4052 | 2011-01-07 12:34:04 +0100 | [diff] [blame] | 73 | print_dscp(uint8_t dscp, int numeric) |
Harald Welte | 2e7377d | 2002-02-17 19:54:42 +0000 | [diff] [blame] | 74 | { |
Jan Engelhardt | 7386635 | 2010-12-18 02:04:59 +0100 | [diff] [blame] | 75 | printf(" 0x%02x", dscp); |
Harald Welte | 2e7377d | 2002-02-17 19:54:42 +0000 | [diff] [blame] | 76 | } |
| 77 | |
Jan Engelhardt | 932e648 | 2007-10-04 16:27:30 +0000 | [diff] [blame] | 78 | static void DSCP_print(const void *ip, const struct xt_entry_target *target, |
| 79 | int numeric) |
Harald Welte | 2e7377d | 2002-02-17 19:54:42 +0000 | [diff] [blame] | 80 | { |
Yasuyuki KOZAKAI | a7bf6d0 | 2007-08-04 08:24:29 +0000 | [diff] [blame] | 81 | const struct xt_DSCP_info *dinfo = |
| 82 | (const struct xt_DSCP_info *)target->data; |
Jan Engelhardt | 7386635 | 2010-12-18 02:04:59 +0100 | [diff] [blame] | 83 | printf(" DSCP set"); |
Harald Welte | ed18bad | 2002-02-17 21:28:51 +0000 | [diff] [blame] | 84 | print_dscp(dinfo->dscp, numeric); |
Harald Welte | 2e7377d | 2002-02-17 19:54:42 +0000 | [diff] [blame] | 85 | } |
| 86 | |
Jan Engelhardt | 932e648 | 2007-10-04 16:27:30 +0000 | [diff] [blame] | 87 | static void DSCP_save(const void *ip, const struct xt_entry_target *target) |
Harald Welte | 2e7377d | 2002-02-17 19:54:42 +0000 | [diff] [blame] | 88 | { |
Yasuyuki KOZAKAI | a7bf6d0 | 2007-08-04 08:24:29 +0000 | [diff] [blame] | 89 | const struct xt_DSCP_info *dinfo = |
| 90 | (const struct xt_DSCP_info *)target->data; |
Harald Welte | 2e7377d | 2002-02-17 19:54:42 +0000 | [diff] [blame] | 91 | |
Jan Engelhardt | 7386635 | 2010-12-18 02:04:59 +0100 | [diff] [blame] | 92 | printf(" --set-dscp 0x%02x", dinfo->dscp); |
Harald Welte | 2e7377d | 2002-02-17 19:54:42 +0000 | [diff] [blame] | 93 | } |
| 94 | |
Jan Engelhardt | 932e648 | 2007-10-04 16:27:30 +0000 | [diff] [blame] | 95 | static struct xtables_target dscp_target = { |
Jan Engelhardt | c5e8573 | 2009-06-12 20:55:44 +0200 | [diff] [blame] | 96 | .family = NFPROTO_UNSPEC, |
Yasuyuki KOZAKAI | a7bf6d0 | 2007-08-04 08:24:29 +0000 | [diff] [blame] | 97 | .name = "DSCP", |
Jan Engelhardt | 8b7c64d | 2008-04-15 11:48:25 +0200 | [diff] [blame] | 98 | .version = XTABLES_VERSION, |
Yasuyuki KOZAKAI | a7bf6d0 | 2007-08-04 08:24:29 +0000 | [diff] [blame] | 99 | .size = XT_ALIGN(sizeof(struct xt_DSCP_info)), |
| 100 | .userspacesize = XT_ALIGN(sizeof(struct xt_DSCP_info)), |
Jan Engelhardt | 932e648 | 2007-10-04 16:27:30 +0000 | [diff] [blame] | 101 | .help = DSCP_help, |
Jan Engelhardt | 932e648 | 2007-10-04 16:27:30 +0000 | [diff] [blame] | 102 | .print = DSCP_print, |
| 103 | .save = DSCP_save, |
Jan Engelhardt | 72c3597 | 2011-03-01 20:28:24 +0100 | [diff] [blame] | 104 | .x6_parse = DSCP_parse, |
| 105 | .x6_fcheck = DSCP_check, |
| 106 | .x6_options = DSCP_opts, |
Harald Welte | 2e7377d | 2002-02-17 19:54:42 +0000 | [diff] [blame] | 107 | }; |
| 108 | |
| 109 | void _init(void) |
| 110 | { |
Jan Engelhardt | 932e648 | 2007-10-04 16:27:30 +0000 | [diff] [blame] | 111 | xtables_register_target(&dscp_target); |
Harald Welte | 2e7377d | 2002-02-17 19:54:42 +0000 | [diff] [blame] | 112 | } |