stack allocated structs, print ips in net examples

examples/tcp_server.zr

@@ -2,12 +2,20 @@ func main[] : i64
     s : i64 = must(net.listen?(net.pack_addr(127, 0, 0, 1), 8000))
 
     io.println("Listening on port 8000...")
+
     resp := mem.alloc(60000)
+    addr := mem.alloc(16)
     while true
-        conn := net.accept(s)
+        conn := net.accept(s, addr)
         if conn < 0
             continue
 
+        io.printf("%d.%d.%d.%d:%d\n", addr[4], addr[5], addr[6], addr[7], mem.read16be(addr + 2))
+
         n := net.read(conn, resp, 60000)
+        
+        io.print_sized(resp, n)
+        io.println("")
+
         net.send(conn, resp, n)
         net.close(conn)