1 // SPDX-License-Identifier: GPL-2.0
2 /* Test program for SIOC{G,S}HWTSTAMP
3  * Copyright 2013 Solarflare Communications
4  * Author: Ben Hutchings
5  */
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 
19 static int
20 lookup_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 
31 static const char *
32 lookup_name(const char **names, int size, int value)
33 {
34 	return (value >= 0 && value < size) ? names[value] : NULL;
35 }
36 
37 static 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 
46 static 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 
55 static 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 
76 static 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 
86 int 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