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6
7#include <errno.h>
8#include <stdio.h>
9#include <stdlib.h>
10#include <string.h>
11
12#include <sys/socket.h>
13#include <sys/ioctl.h>
14
15#include <linux/if.h>
16#include <linux/net_tstamp.h>
17#include <linux/sockios.h>
18
19static int
20lookup_value(const char **names, int size, const char *name)
21{
22 int value;
23
24 for (value = 0; value < size; value++)
25 if (names[value] && strcasecmp(names[value], name) == 0)
26 return value;
27
28 return -1;
29}
30
31static const char *
32lookup_name(const char **names, int size, int value)
33{
34 return (value >= 0 && value < size) ? names[value] : NULL;
35}
36
37static void list_names(FILE *f, const char **names, int size)
38{
39 int value;
40
41 for (value = 0; value < size; value++)
42 if (names[value])
43 fprintf(f, " %s\n", names[value]);
44}
45
46static const char *tx_types[] = {
47#define TX_TYPE(name) [HWTSTAMP_TX_ ## name] = #name
48 TX_TYPE(OFF),
49 TX_TYPE(ON),
50 TX_TYPE(ONESTEP_SYNC)
51#undef TX_TYPE
52};
53#define N_TX_TYPES ((int)(sizeof(tx_types) / sizeof(tx_types[0])))
54
55static const char *rx_filters[] = {
56#define RX_FILTER(name) [HWTSTAMP_FILTER_ ## name] = #name
57 RX_FILTER(NONE),
58 RX_FILTER(ALL),
59 RX_FILTER(SOME),
60 RX_FILTER(PTP_V1_L4_EVENT),
61 RX_FILTER(PTP_V1_L4_SYNC),
62 RX_FILTER(PTP_V1_L4_DELAY_REQ),
63 RX_FILTER(PTP_V2_L4_EVENT),
64 RX_FILTER(PTP_V2_L4_SYNC),
65 RX_FILTER(PTP_V2_L4_DELAY_REQ),
66 RX_FILTER(PTP_V2_L2_EVENT),
67 RX_FILTER(PTP_V2_L2_SYNC),
68 RX_FILTER(PTP_V2_L2_DELAY_REQ),
69 RX_FILTER(PTP_V2_EVENT),
70 RX_FILTER(PTP_V2_SYNC),
71 RX_FILTER(PTP_V2_DELAY_REQ),
72#undef RX_FILTER
73};
74#define N_RX_FILTERS ((int)(sizeof(rx_filters) / sizeof(rx_filters[0])))
75
76static void usage(void)
77{
78 fputs("Usage: hwtstamp_config if_name [tx_type rx_filter]\n"
79 "tx_type is any of (case-insensitive):\n",
80 stderr);
81 list_names(stderr, tx_types, N_TX_TYPES);
82 fputs("rx_filter is any of (case-insensitive):\n", stderr);
83 list_names(stderr, rx_filters, N_RX_FILTERS);
84}
85
86int main(int argc, char **argv)
87{
88 struct ifreq ifr;
89 struct hwtstamp_config config;
90 const char *name;
91 int sock;
92
93 if ((argc != 2 && argc != 4) || (strlen(argv[1]) >= IFNAMSIZ)) {
94 usage();
95 return 2;
96 }
97
98 if (argc == 4) {
99 config.flags = 0;
100 config.tx_type = lookup_value(tx_types, N_TX_TYPES, argv[2]);
101 config.rx_filter = lookup_value(rx_filters, N_RX_FILTERS, argv[3]);
102 if (config.tx_type < 0 || config.rx_filter < 0) {
103 usage();
104 return 2;
105 }
106 }
107
108 sock = socket(AF_INET, SOCK_DGRAM, 0);
109 if (sock < 0) {
110 perror("socket");
111 return 1;
112 }
113
114 strcpy(ifr.ifr_name, argv[1]);
115 ifr.ifr_data = (caddr_t)&config;
116
117 if (ioctl(sock, (argc == 2) ? SIOCGHWTSTAMP : SIOCSHWTSTAMP, &ifr)) {
118 perror("ioctl");
119 return 1;
120 }
121
122 printf("flags = %#x\n", config.flags);
123 name = lookup_name(tx_types, N_TX_TYPES, config.tx_type);
124 if (name)
125 printf("tx_type = %s\n", name);
126 else
127 printf("tx_type = %d\n", config.tx_type);
128 name = lookup_name(rx_filters, N_RX_FILTERS, config.rx_filter);
129 if (name)
130 printf("rx_filter = %s\n", name);
131 else
132 printf("rx_filter = %d\n", config.rx_filter);
133
134 return 0;
135}
136
