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

1 files changed, 58 insertions, 0 deletions

diff --git a/rbs_lapd/rbs_sabm.c b/rbs_lapd/rbs_sabm.c
new file mode 100644
index 0000000..d71ef49
--- /dev/null
+++ b/rbs_lapd/rbs_sabm.c
@@ -0,0 +1,58 @@
+#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));
+		}
+	}
+}