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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <getopt.h>
#include <stdarg.h>
#include <errno.h>
#include <rte_memory.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;
/**
* Prints out usage information to stdout
*/
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);
}
/**
* The ports to be used by the application are passed in
* the form of a bitmask. This function parses the bitmask
* and places the port numbers to be used into the port[]
* array variable
*/
static int
parse_portmask(uint8_t max_ports, const char *portmask)
{
char *end = NULL;
unsigned long pm;
uint16_t count = 0;
if (portmask == NULL || *portmask == '\0')
return -1;
/* convert parameter to a number and verify */
pm = strtoul(portmask, &end, 16);
if (end == NULL || *end != '\0' || pm == 0)
return -1;
/* loop through bits of the mask and mark ports */
while (pm != 0){
if (pm & 0x01){ /* bit is set in mask, use port */
if (count >= max_ports)
printf("WARNING: requested port %u not present"
" - ignoring\n", (unsigned)count);
else
ports->id[ports->num_ports++] = count;
}
pm = (pm >> 1);
count++;
}
return 0;
}
/**
* Take the number of clients parameter passed to the app
* and convert to a number to store in the num_clients variable
*/
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;
}
/**
* The application specific arguments follow the DPDK-specific
* arguments which are stripped by the DPDK init. This function
* processes these application arguments, printing usage info
* on error.
*/
int
parse_app_args(uint16_t max_ports, 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(max_ports, 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;
}
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