/*
* Copyright (c) 2015 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <sys/types.h>
#include <sys/param.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <net/ethernet.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/udp.h>
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <rtems.h>
#include <rtems/shell.h>
#include <rtems/telnetd.h>
#include <rtems/bsd/zerocopy.h>
#include <rtems/bsd/test/network-config.h>
#define TEST_NAME "LIBBSD ZEROCOPY 1"
#define BUFFER_COUNT 128
#define NOTIFY_THRESHOLD 64
#define DATA_SIZE (ETHERMTU - sizeof(struct ip) - sizeof(struct udphdr))
struct buffer {
SLIST_ENTRY(buffer) link;
u_int ref_cnt;
char *data;
};
struct buffer_control {
SLIST_HEAD(buffer_list, buffer) free_list;
rtems_interrupt_lock lock;
size_t free_buffers;
rtems_id waiting_task;
struct buffer buffers[BUFFER_COUNT];
char data[DATA_SIZE][BUFFER_COUNT];
};
static struct buffer_control buffer_control;
static void
buffer_free(void *arg1, void *arg2)
{
struct buffer_control *bc = arg1;
struct buffer *buf = arg2;
rtems_status_code sc;
rtems_interrupt_lock_context lock_context;
rtems_id waiting_task;
buf->ref_cnt = 0;
rtems_interrupt_lock_acquire(&bc->lock, &lock_context);
SLIST_INSERT_HEAD(&bc->free_list, buf, link);
waiting_task = bc->waiting_task;
++bc->free_buffers;
if (bc->free_buffers < NOTIFY_THRESHOLD) {
waiting_task = 0;
}
rtems_interrupt_lock_release(&bc->lock, &lock_context);
if (waiting_task != 0) {
sc = rtems_event_transient_send(waiting_task);
assert(sc == RTEMS_SUCCESSFUL);
}
}
static struct mbuf *
buffer_get(struct buffer_control *bc)
{
struct mbuf *m = rtems_bsd_m_gethdr(M_WAITOK, MT_DATA);
struct buffer *buf;
rtems_status_code sc;
rtems_interrupt_lock_context lock_context;
do {
rtems_interrupt_lock_acquire(&bc->lock, &lock_context);
if (SLIST_EMPTY(&bc->free_list)) {
bc->waiting_task = rtems_task_self();
rtems_interrupt_lock_release(&bc->lock, &lock_context);
sc = rtems_event_transient_receive(RTEMS_WAIT,
RTEMS_NO_TIMEOUT);
assert(sc == RTEMS_SUCCESSFUL);
buf = NULL;
} else {
buf = SLIST_FIRST(&bc->free_list);
SLIST_REMOVE_HEAD(&bc->free_list, link);
--bc->free_buffers;
rtems_interrupt_lock_release(&bc->lock, &lock_context);
}
} while (buf == NULL);
m->m_len = DATA_SIZE;
m->m_pkthdr.len = DATA_SIZE;
rtems_bsd_m_extaddref(m, buf, DATA_SIZE, &buf->ref_cnt, buffer_free,
bc, buf);
return (m);
}
static void
network_flood_task(rtems_task_argument arg)
{
int fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
struct sockaddr_in addr = {
.sin_len = sizeof(addr),
.sin_family = AF_INET,
.sin_port = htons(13161),
.sin_addr = {
.s_addr = INADDR_ANY
}
};
int rv = inet_aton(NET_CFG_PEER_IP, &addr.sin_addr);
struct buffer_control *bc = (struct buffer_control *)arg;
assert(fd >= 0);
assert(rv != 0);
while (true) {
struct mbuf *m = buffer_get(bc);
int error = rtems_bsd_sendto(
fd,
m,
0,
(const struct sockaddr *) &addr
);
if (error != 0) {
printf("zerocopy sendto error: %s\n", strerror(error));
sleep(1);
}
}
}
static void
telnet_shell(char *name, void *arg)
{
rtems_shell_env_t env;
memset(&env, 0, sizeof(env));
env.devname = name;
env.taskname = "TLNT";
env.login_check = NULL;
env.forever = false;
rtems_shell_main_loop(&env);
}
rtems_telnetd_config_table rtems_telnetd_config = {
.command = telnet_shell,
.arg = NULL,
.priority = 2,
.stack_size = 0,
.login_check = NULL,
.keep_stdio = false
};
static void
test_main(void)
{
struct buffer_control *bc = &buffer_control;
rtems_status_code sc;
rtems_id id;
size_t i;
sc = rtems_telnetd_initialize();
assert(sc == RTEMS_SUCCESSFUL);
SLIST_INIT(&bc->free_list);
for (i = 0; i < BUFFER_COUNT; ++i) {
SLIST_INSERT_HEAD(&bc->free_list, &bc->buffers[i], link);
bc->buffers[i].data = &bc->data[i][0];
}
sc = rtems_task_create(
rtems_build_name('F', 'L', 'O', 'D'),
3,
RTEMS_MINIMUM_STACK_SIZE,
RTEMS_DEFAULT_MODES,
RTEMS_DEFAULT_ATTRIBUTES,
&id
);
assert(sc == RTEMS_SUCCESSFUL);
sc = rtems_task_start(id, network_flood_task, (rtems_task_argument) bc);
assert(sc == RTEMS_SUCCESSFUL);
rtems_task_delete(RTEMS_SELF);
assert(0);
}
#define DEFAULT_NETWORK_DHCPCD_ENABLE
#define DEFAULT_NETWORK_SHELL
#define CONFIGURE_MAXIMUM_DRIVERS 32
#include <rtems/bsd/test/default-network-init.h>
