release/src/router/iptables/extensions/libipt_dscp_helper.c

   1 /*
   2  * DiffServ classname <-> DiffServ codepoint mapping functions.
   3  *
   4  * The latest list of the mappings can be found at:
   5  * <http://www.iana.org/assignments/dscp-registry>
   6  *
   7  * This code is released under the GNU GPL v2, 1991
   8  *
   9  * Author: Iain Barnes
  10  */
  11
  12 #include <stdio.h>
  13 #include <string.h>
  14 #include <iptables_common.h>
  15
  16
  17
  18 static struct ds_class
  19 {
  20         const char *name;
  21         unsigned int dscp;
  22 } ds_classes[] =
  23 {
  24         { "CS0", 0x00 },
  25         { "CS1", 0x08 },
  26         { "CS2", 0x10 },
  27         { "CS3", 0x18 },
  28         { "CS4", 0x20 },
  29         { "CS5", 0x28 },
  30         { "CS6", 0x30 },
  31         { "CS7", 0x38 },
  32         { "BE", 0x00 },
  33         { "AF11", 0x0a },
  34         { "AF12", 0x0c },
  35         { "AF13", 0x0e },
  36         { "AF21", 0x12 },
  37         { "AF22", 0x14 },
  38         { "AF23", 0x16 },
  39         { "AF31", 0x1a },
  40         { "AF32", 0x1c },
  41         { "AF33", 0x1e },
  42         { "AF41", 0x22 },
  43         { "AF42", 0x24 },
  44         { "AF43", 0x26 },
  45         { "EF", 0x2e }
  46 };
  47
  48
  49
  50 static unsigned int
  51 class_to_dscp(const char *name)
  52 {
  53         int i;
  54
  55         for (i = 0; i < sizeof(ds_classes) / sizeof(struct ds_class); i++) {
  56                 if (!strncasecmp(name, ds_classes[i].name,
  57                                         strlen(ds_classes[i].name)))
  58                         return ds_classes[i].dscp;
  59         }
  60
  61         exit_error(PARAMETER_PROBLEM,
  62                         "Invalid DSCP value `%s'\n", name);
  63 }
  64
  65
  66 #if 0
  67 static const char *
  68 dscp_to_name(unsigned int dscp)
  69 {
  70         int i;
  71
  72         for (i = 0; i < sizeof(ds_classes) / sizeof(struct ds_class); i++) {
  73                 if (dscp == ds_classes[i].dscp)
  74                         return ds_classes[i].name;
  75         }
  76
  77
  78         exit_error(PARAMETER_PROBLEM,
  79                         "Invalid DSCP value `%d'\n", dscp);
  80 }
  81 #endif
  82