From 7519e57749e176be60b7185d7bbdc298b1744c3c Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Sat, 20 Aug 2022 15:05:19 +0200
Subject: user/ethdump: UDP support

---
 src/user/app/netdog/nd.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 src/user/app/netdog/nd.c

(limited to 'src/user/app/netdog/nd.c')

diff --git a/src/user/app/netdog/nd.c b/src/user/app/netdog/nd.c
new file mode 100644
index 0000000..363c6c6
--- /dev/null
+++ b/src/user/app/netdog/nd.c
@@ -0,0 +1,47 @@
+#include <camellia/syscalls.h>
+#include <stdio.h>
+#include <string.h>
+#include <user/lib/thread.h>
+
+#define eprintf(fmt, ...) fprintf(stderr, "netdog: "fmt"\n" __VA_OPT__(,) __VA_ARGS__)
+
+handle_t conn;
+
+void send_stdin(void *arg) { (void)arg;
+	static char buf[4096];
+	for (;;) {
+		// TODO define STDIN_FILENO
+		long ret = _syscall_read(0, buf, sizeof buf, -1);
+		if (ret <= 0) return; /* instead of sending an empty packet, quit. */
+		ret = _syscall_write(conn, buf, ret, -1, 0);
+		if (ret < 0) return;
+	}
+}
+
+void recv_stdout(void *arg) { (void)arg;
+	static char buf[4096];
+	for (;;) {
+		long ret = _syscall_read(conn, buf, sizeof buf, -1);
+		if (ret < 0) return;
+		ret = _syscall_write(1, buf, ret, -1, 0);
+		if (ret < 0) return;
+	}
+}
+
+int main(int argc, char **argv) {
+	if (argc < 2) {
+		eprintf("no argument");
+		return 1;
+	}
+
+	conn = _syscall_open(argv[1], strlen(argv[1]), 0);
+	if (conn < 0) {
+		eprintf("couldn't open '%s', err %u", argv[1], -conn);
+		return -conn;
+	}
+
+	thread_create(0, send_stdin, NULL);
+	thread_create(0, recv_stdout, NULL);
+	_syscall_await();
+	return 0;
+}
-- 
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