Hi,
I'm trying to send raw ethernet packages on Xenomai, I'm also working
with the trunk version of RTnet. I looked at the example
"raw-ethernet.c" and I'm wondering why the functions like socket_rt,
send_rt ,.. aren't used. Is it still real-time? I tried to use the
real-time functions like socket_rt,... but then I can't send or receive
raw ethernet packages anymore: the function send_rt returns -1.
I attached the program code. Running the program (I use rtlo as
interface) results in the following output:
Socket created: socket id: 0
Got interface: index: 0
Sending frames...
Cannot send: Success
Length: -1
shutting down
My second problem is the reason why I only can use the loopback: I use a
Realtek rtl8139 network card. Loading the modules works fine with
insmod. With dmesg I see rteth0 has been initialized but when I want to
activate it with "rtifconfig rteth0 up 192.168.1.100" my system freezes
without any message and the only solution is a hard reboot. Does anyone
also has this problem, or has any solution?
Tom
/***
*
* examples/xenomai/posix/raw-ethernet.c
*
* SOCK_RAW sender - sends out Ethernet frames via a SOCK_RAW packet socket
*
* Copyright (C) 2006 Jan Kiszka <[EMAIL PROTECTED]>
*
* RTnet - real-time networking example
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <errno.h>
#include <signal.h>
#include <pthread.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netpacket/packet.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <rtnet.h>
char buffer[1514];
int sock;
void catch_signal(int sig)
{
close_rt(sock);
}
int main(int argc, char *argv[])
{
ssize_t len;
struct sockaddr_ll addr;
struct ifreq ifr;
struct timespec delay = { 1, 0 };
struct ether_header *eth = (struct ether_header *)buffer;
signal(SIGTERM, catch_signal);
signal(SIGINT, catch_signal);
signal(SIGHUP, catch_signal);
if (argc < 2) {
printf("usage: %s <interface>\n", argv[0]);
return 0;
}
if ((sock = socket_rt(PF_PACKET, SOCK_RAW, htons(0x1234))) < 0) {
perror("socket cannot be created");
return 1;
}
printf("Socket created: socket id: %d\n", sock);
int index_ioctl = 0;
strncpy(ifr.ifr_name, argv[1], IFNAMSIZ);
if ((index_ioctl = ioctl_rt(sock, SIOCGIFINDEX, &ifr)) < 0) {
perror("cannot get interface index");
close_rt(sock);
return 1;
}
printf("Got interface: index: %d\n", index_ioctl);
addr.sll_family = AF_PACKET;
addr.sll_protocol = htons(0x1234);
addr.sll_ifindex = ifr.ifr_ifindex;
if (bind_rt(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
perror("cannot bind to local ip/port");
close_rt(sock);
return 1;
}
memset(eth->ether_dhost, 0xFF, ETH_HLEN);
eth->ether_type = htons(0x1234);
printf("Sending data...\n");
int tel = 0;
while (1) {
len = send_rt(sock, buffer, sizeof(buffer), 0);
if (len < 0) {
perror("Cannot send");
printf("Length: %d\n", len);
break;
}
tel++;
printf("Sent frame %d of %d bytes\n", tel, len);
nanosleep(&delay, NULL);
}
/* This call also leaves primary mode, required for socket cleanup. */
printf("shutting down\n");
while ((close_rt(sock) < 0) && (errno == EAGAIN)) {
printf("socket busy - waiting...\n");
sleep(1);
}
return 0;
}
/***
*
* examples/xenomai/posix/raw-ethernet.c
*
* SOCK_RAW sender - sends out Ethernet frames via a SOCK_RAW packet socket
*
* Copyright (C) 2006 Jan Kiszka <[EMAIL PROTECTED]>
*
* RTnet - real-time networking example
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <errno.h>
#include <signal.h>
#include <pthread.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netpacket/packet.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <rtnet.h>
char buffer[1514];
int sock;
void catch_signal(int sig)
{
close_rt(sock);
}
int main(int argc, char *argv[])
{
ssize_t len;
struct sockaddr_ll addr;
struct ifreq ifr;
struct timespec delay = { 1, 0 };
struct ether_header *eth = (struct ether_header *)buffer;
signal(SIGTERM, catch_signal);
signal(SIGINT, catch_signal);
signal(SIGHUP, catch_signal);
mlockall(MCL_CURRENT|MCL_FUTURE);
if (argc < 2) {
printf("usage: %s <interface>\n", argv[0]);
return 0;
}
if ((sock = socket_rt(PF_PACKET, SOCK_RAW, htons(0x1234))) < 0) {
perror("socket cannot be created");
return 1;
}
printf("Socket created: socket id: %d\n", sock);
int index_ioctl;
strncpy(ifr.ifr_name, argv[1], IFNAMSIZ);
if (ioctl_rt(sock, SIOCGIFINDEX, &ifr) < 0) {
perror("cannot get interface index");
close_rt(sock);
return 1;
}
printf("Got interface: index: %d\n", index_ioctl);
addr.sll_family = AF_PACKET;
addr.sll_protocol = htons(0x1234);
addr.sll_ifindex = ifr.ifr_ifindex;
if (bind_rt(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
perror("cannot bind to local ip/port");
close_rt(sock);
return 1;
}
printf("Receiving data...\n");
int tel = 0;
while (1) {
len = recv_rt(sock, buffer, sizeof(buffer), 0);
if (len < 0) {
perror("Cannot Receive");
printf("Length: %d\n", len);
break;
}
tel++;
printf("Received frame %d of %d bytes\n", tel, len);
//nanosleep(&delay, NULL);
}
/* This call also leaves primary mode, required for socket cleanup. */
printf("shutting down\n");
while ((close_rt(sock) < 0) && (errno == EAGAIN)) {
printf("socket busy - waiting...\n");
sleep(1);
}
return 0;
}
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