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