ipc_tcp: add new ipc example using loopback sockets

This demo should (hopefully serve) as a basis for overlaying pcap
and ftrace data within trace compass.

Signed-off-by: John Ogness <john.ogness@linutronix.de>

1 files changed, 52 insertions, 0 deletions

diff --git a/schulung_tools/ipc_tcp/send.c b/schulung_tools/ipc_tcp/send.c
new file mode 100644
index 0000000..60d2f1f
--- /dev/null
+++ b/schulung_tools/ipc_tcp/send.c
@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+static char buffer[1024 * 1024];
+
+int main(void)
+{
+	struct sockaddr_in sa;
+	size_t count = 0;
+	size_t size;
+	int rv;
+	int s;
+
+	s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+	if (s < 0)
+		return 1;
+	memset(&sa, 0, sizeof(sa));
+	sa.sin_family = AF_INET;
+	sa.sin_addr.s_addr = inet_addr("127.0.0.1");
+	sa.sin_port = htons(8806);
+
+	if (connect(s, (struct sockaddr *)&sa, sizeof(struct sockaddr)) != 0)
+		return 1;
+
+	printf("send (%d): type message and hit RETURN to send signal\n",
+	       getpid());
+	fgets(buffer, sizeof(buffer), stdin);
+
+	/* set "sending" uprobe here */
+
+	size = strlen(buffer);
+
+	if (write(s, &size, sizeof(size)) != sizeof(size))
+		return 1;
+
+	while (count < size) {
+		rv = write(s, buffer + count, size - count);
+		if (rv <= 0)
+			return 1;
+		count += rv;
+	}
+
+	sleep(1);
+
+	return 0;
+}