linux/tools/testing/selftests/net/hwtstamp_config.c
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   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
  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