1 files changed, 39 insertions, 0 deletions
diff --git a/src/user/app/ethdump/ethdump.c b/src/user/app/ethdump/ethdump.c
new file mode 100644
index 0000000..249ecd7
--- /dev/null
+++ b/src/user/app/ethdump/ethdump.c
@@ -0,0 +1,39 @@
+#include <camellia/syscalls.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define eprintf(fmt, ...) fprintf(stderr, "ethdump: "fmt"\n" __VA_OPT__(,) __VA_ARGS__)
+
+void hexdump(void *vbuf, size_t len) {
+	uint8_t *buf = vbuf;
+	for (size_t i = 0; i < len; i += 16) {
+		printf("%08x  ", i);
+
+		for (size_t j = i; j < i + 8 && j < len; j++)
+			printf("%02x ", buf[j]);
+		printf(" ");
+		for (size_t j = i + 8; j < i + 16 && j < len; j++)
+			printf("%02x ", buf[j]);
+		printf("\n");
+	}
+}
+
+int main(void) {
+	const char *path = "/kdev/eth";
+	handle_t h = _syscall_open(path, strlen(path), 0);
+	if (h < 0) {
+		eprintf("couldn't open %s", path);
+		return 1;
+	}
+
+	const size_t buflen = 4096;
+	char *buf = malloc(buflen);
+	for (;;) {
+		long ret = _syscall_read(h, buf, buflen, -1);
+		if (ret < 0) break;
+		printf("packet of length %u\n", ret);
+		hexdump(buf, ret);
+	}
+}