2 files changed, 28 insertions(+), 2 deletions(-)

M net/icmp/+test.ha
M net/icmp/message.ha

@@ 1,3 1,7 @@
-@test fn message() void = {
+@test fn encode() void = {
+    assert(1 == 1);
+};
+
+@test fn decode() void = {
     assert(1 == 1);
 };=
\ No newline at end of file

@@ 53,7 53,29 @@ export type parameter_problem = struct {
 
 // Encodes a [[message]] into a slice of bytes ready to be transmitted over the wire
 export fn encode(in: *message, out: []u8) void = {
-    return;
+    out[1] = in.code: u8;
+    endian::beputu16(out[2..4], in.checksum: u16);
+
+    match (in.body) {
+    case let m: echo =>
+        out[0] = V4_ECHO: u8;
+        endian::beputu16(out[4..6], m.id: u16);
+        endian::beputu16(out[6..8], m.seq: u16);
+        out[8..] = m.data;
+    case let m: reply =>
+        out[0] = V4_ECHO_REPLY: u8;
+        endian::beputu16(out[4..6], m.id: u16);
+        endian::beputu16(out[6..8], m.seq: u16);
+        out[8..] = m.data;
+    case let m: destination_unreachable =>
+        out[0] = V4_DESTINATION_UNREACHABLE: u8;
+    case let m: time_exeeded =>
+        out[0] = V4_TIME_EXCEEDED: u8;
+    case let m: parameter_problem =>
+        out[0] = V4_PARAMETER_PROBLEM: u8;
+        out[4] = m.pointer: u8;
+        out[5..] = m.data;
+    };
 };
 
 // Decodes a slice of bytes from the wire into a [[message]]