调整项目结构、尝试支持安卓

switch/packet/src/ip/mod.rs

@@ -0,0 +1,18 @@
+use ipv4::packet::IpV4Packet;
+
+use crate::error::*;
+
+pub mod ipv4;
+
+pub enum IpPacket<B> {
+    V4(IpV4Packet<B>),
+}
+
+impl<B: AsRef<[u8]>> IpPacket<B> {
+    pub fn new(buffer: B) -> Result<Self> {
+        match buffer.as_ref()[0] >> 4 {
+            4 => Ok(IpPacket::V4(IpV4Packet::new(buffer)?)),
+            _ => Err(Error::InvalidPacket),
+        }
+    }
+}