root/tools/testing/selftests/networking/timestamping/hwtstamp_config.c

DEFINITIONS

1. lookup_value
2. lookup_name
3. list_names
4. usage
5. main

   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 }