调整项目结构、尝试支持安卓

switch/packet/src/tcp/mod.rs

@@ -0,0 +1,42 @@
+use std::fmt;
+
+pub mod tcp;
+
+pub struct Flags(u8);
+
+pub const FIN: u8 = 0b0000_0001;
+pub const SYN: u8 = 0b0000_0010;
+pub const RST: u8 = 0b0000_0100;
+pub const PSH: u8 = 0b0000_1000;
+pub const ACK: u8 = 0b0001_0000;
+pub const URG: u8 = 0b0010_0000;
+
+impl fmt::Debug for Flags {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let mut str = String::with_capacity(22);
+        if self.0 & URG != 0 {
+            str.push_str("URG|");
+        }
+        if self.0 & ACK != 0 {
+            str.push_str("ACK|");
+        }
+        if self.0 & PSH != 0 {
+            str.push_str("PSH|");
+        }
+        if self.0 & RST != 0 {
+            str.push_str("RST|");
+        }
+        if self.0 & SYN != 0 {
+            str.push_str("SYN|");
+        }
+        if self.0 & FIN != 0 {
+            str.push_str("FIN|");
+        }
+        if str.is_empty() {
+            f.debug_struct("NULL").finish()
+        } else {
+            let len = str.len() - 1;
+            f.debug_struct(&str[..len]).finish()
+        }
+    }
+}