1 #include <stdbool.h>
2 #include <stdint.h>
3 #include <stdio.h>
4 #include <linux/ip.h>
5
6 #ifndef IPTOS_NORMALSVC
7 # define IPTOS_NORMALSVC 0
8 #endif
9
10 struct tos_value_mask {
11 uint8_t value, mask;
12 };
13
14 static const struct tos_symbol_info {
15 unsigned char value;
16 const char *name;
17 } tos_symbol_names[] = {
18 {IPTOS_LOWDELAY, "Minimize-Delay"},
19 {IPTOS_THROUGHPUT, "Maximize-Throughput"},
20 {IPTOS_RELIABILITY, "Maximize-Reliability"},
21 {IPTOS_MINCOST, "Minimize-Cost"},
22 {IPTOS_NORMALSVC, "Normal-Service"},
23 {},
24 };
25
tos_try_print_symbolic(const char * prefix,uint8_t value,uint8_t mask)26 static bool tos_try_print_symbolic(const char *prefix,
27 uint8_t value, uint8_t mask)
28 {
29 const struct tos_symbol_info *symbol;
30
31 if (mask != 0x3F)
32 return false;
33
34 for (symbol = tos_symbol_names; symbol->name != NULL; ++symbol)
35 if (value == symbol->value) {
36 printf(" %s%s", prefix, symbol->name);
37 return true;
38 }
39
40 return false;
41 }
42