24 lines
573 B
Rust
24 lines
573 B
Rust
use std::net::Ipv4Addr;
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// 目标ip，子网掩码，网关
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pub struct ExternalRoute {
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route_table: Vec<(u32, u32, Ipv4Addr)>,
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}
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impl ExternalRoute {
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pub fn new(route_table: Vec<(u32, u32, Ipv4Addr)>) -> Self {
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Self {
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route_table
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}
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}
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pub fn route(&self, ip: &Ipv4Addr) -> Option<Ipv4Addr> {
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let ip = u32::from_be_bytes(ip.octets());
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for (dest, mask, gateway) in &self.route_table {
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if *mask & ip == *mask & *dest {
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return Some(*gateway);
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}
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}
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None
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}
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} |