user/ethdump: file per protocol, ethernet frame functions

1 files changed, 38 insertions, 0 deletions

diff --git a/src/user/app/ethdump/util.h b/src/user/app/ethdump/util.h
new file mode 100644
index 0000000..536f270
--- /dev/null
+++ b/src/user/app/ethdump/util.h
@@ -0,0 +1,38 @@
+#pragma once
+#include <stdint.h>
+#include <stdio.h>
+
+#define eprintf(fmt, ...) fprintf(stderr, "ethdump: "fmt"\n" __VA_OPT__(,) __VA_ARGS__)
+
+void hexdump(const void *vbuf, size_t len);
+
+uint32_t crc32(const uint8_t *buf, size_t len);
+
+
+static inline void nput16(void *vbuf, uint16_t n) {
+	uint8_t *b = vbuf;
+	b[0] = n >> 8;
+	b[1] = n >> 0;
+}
+
+static inline void nput32(void *vbuf, uint32_t n) {
+	uint8_t *b = vbuf;
+	b[0] = n >> 24;
+	b[1] = n >> 16;
+	b[2] = n >>  8;
+	b[3] = n >>  0;
+}
+
+static inline uint16_t nget16(const void *vbuf) {
+	const uint8_t *b = vbuf;
+	return (b[0] << 8)
+	     | (b[1] << 0);
+}
+
+static inline uint32_t nget32(const void *vbuf) {
+	const uint8_t *b = vbuf;
+	return (b[0] << 24)
+	     | (b[1] << 16)
+	     | (b[2] <<  8)
+	     | (b[3] <<  0);
+}