DPDK  22.11.0
examples/multi_process/client_server_mp/mp_server/args.c
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2014 Intel Corporation
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <getopt.h>
#include <stdarg.h>
#include <errno.h>
#include <rte_memory.h>
#include <rte_ethdev.h>
#include <rte_string_fns.h>
#include "common.h"
#include "args.h"
#include "init.h"
/* global var for number of clients - extern in header */
uint8_t num_clients;
static const char *progname;
static void
usage(void)
{
printf(
"%s [EAL options] -- -p PORTMASK -n NUM_CLIENTS [-s NUM_SOCKETS]\n"
" -p PORTMASK: hexadecimal bitmask of ports to use\n"
" -n NUM_CLIENTS: number of client processes to use\n"
, progname);
}
static int
parse_portmask(const char *portmask)
{
char *end = NULL;
unsigned long long pm;
uint16_t id;
if (portmask == NULL || *portmask == '\0')
return -1;
/* convert parameter to a number and verify */
errno = 0;
pm = strtoull(portmask, &end, 16);
if (errno != 0 || end == NULL || *end != '\0')
return -1;
unsigned long msk = 1u << id;
if ((pm & msk) == 0)
continue;
pm &= ~msk;
ports->id[ports->num_ports++] = id;
}
if (pm != 0) {
printf("WARNING: leftover ports in mask %#llx - ignoring\n",
pm);
}
return 0;
}
static int
parse_num_clients(const char *clients)
{
char *end = NULL;
unsigned long temp;
if (clients == NULL || *clients == '\0')
return -1;
temp = strtoul(clients, &end, 10);
if (end == NULL || *end != '\0' || temp == 0)
return -1;
num_clients = (uint8_t)temp;
return 0;
}
int
parse_app_args(int argc, char *argv[])
{
int option_index, opt;
char **argvopt = argv;
static struct option lgopts[] = { /* no long options */
{NULL, 0, 0, 0 }
};
progname = argv[0];
while ((opt = getopt_long(argc, argvopt, "n:p:", lgopts,
&option_index)) != EOF){
switch (opt){
case 'p':
if (parse_portmask(optarg) != 0) {
usage();
return -1;
}
break;
case 'n':
if (parse_num_clients(optarg) != 0){
usage();
return -1;
}
break;
default:
printf("ERROR: Unknown option '%c'\n", opt);
usage();
return -1;
}
}
if (ports->num_ports == 0 || num_clients == 0){
usage();
return -1;
}
if (ports->num_ports % 2 != 0){
printf("ERROR: application requires an even number of ports to use\n");
return -1;
}
return 0;
}