demikernel 1.5.13

Kernel-Bypass LibOS Architecture
Documentation 
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// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.

use crate::runtime::network::{
    config::{
        ArpConfig,
        TcpConfig,
        UdpConfig,
    },
    types::MacAddress,
};
use ::rand::{
    thread_rng,
    Rng,
};
use ::std::net::Ipv4Addr;

#[derive(Clone, Debug)]
pub struct Options {
    pub arp: ArpConfig,
    pub my_ipv4_addr: Ipv4Addr,
    pub my_link_addr: MacAddress,
    pub rng_seed: [u8; 32],
    pub tcp: TcpConfig,
    pub udp: UdpConfig,
}

impl Default for Options {
    fn default() -> Self {
        let mut rng_seed = [0; 32];
        thread_rng().fill(rng_seed.as_mut());
        Options {
            arp: ArpConfig::default(),
            my_ipv4_addr: Ipv4Addr::new(0, 0, 0, 0),
            my_link_addr: MacAddress::nil(),
            rng_seed,
            tcp: TcpConfig::default(),
            udp: Default::default(),
        }
    }
}

impl Options {
    pub fn arp(mut self, value: ArpConfig) -> Self {
        self.arp = value;
        self
    }

    pub fn my_ipv4_addr(mut self, value: Ipv4Addr) -> Self {
        assert!(!value.is_unspecified());
        assert!(!value.is_broadcast());
        self.my_ipv4_addr = value;
        self
    }

    pub fn my_link_addr(mut self, value: MacAddress) -> Self {
        assert!(!value.is_nil());
        assert!(!value.is_broadcast());
        self.my_link_addr = value;
        self
    }

    pub fn rng_seed(mut self, value: [u8; 32]) -> Self {
        self.rng_seed = value;
        self
    }

    pub fn tcp(mut self, value: TcpConfig) -> Self {
        self.tcp = value;
        self
    }
}