add tool to send continuous sequence of SABM frames into a D-channel

This commit is contained in:
Harald Welte 2011-02-09 00:14:59 +01:00
parent 05a2641780
commit 02ddcf9d90
1 changed files with 58 additions and 0 deletions

58
rbs_lapd/rbs_sabm.c Normal file
View File

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#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
/* this program wants to be called with 'strace -s1024 -x' so you see the data
* betewen DAHDI and it */
const uint8_t sabme_frame_nonraw[] = { 0xFA, 0x7D, 0x7F };
static int fd;
static uint8_t dummy_buf[8192];
static void dummy_read(int fd, unsigned int len)
{
int rc;
if (len > sizeof(dummy_buf))
len = sizeof(dummy_buf);
rc = read(fd, dummy_buf, len);
}
int main(int argc, char **argv)
{
int rc;
if (argc < 2)
exit(2);
fd = open(argv[1], O_RDWR|O_NONBLOCK);
if (fd < 0) {
perror("open");
exit(1);
}
while (1) {
fd_set read_fd;
struct timeval timeout;
FD_ZERO(&read_fd);
FD_SET(fd, &read_fd);
timeout.tv_sec = 1;
timeout.tv_usec = 0;
rc = select(fd+1, &read_fd, NULL, NULL, &timeout);
if (rc < 0) {
perror("Select");
exit(1);
} else if (rc) {
dummy_read(fd, 16);
} else {
write(fd, sabme_frame_nonraw, sizeof(sabme_frame_nonraw));
}
}
}