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Jonas Termansen authored
This change adds all the kernel parts of a network stack. The network stack is partial but implements many of the important parts. Add if(4) network interface abstraction. Network interfaces are registered in a global list that can be iterated and each assigned an unique integer identifier. Add reference counted packets with a cache that recycles recent packets. Add support for lo(4) loopback and ether(4) ethernet network interfaces. The /dev/lo0 loopback device is created automatically on boot. Add arp(4) address resolution protocol driver for translation of inet(4) network layer addresses into ether(4) link layer addresses. arp(4) entries are cached and evicted from the cache when needed or when the entry has not been used for a while. The cache is limited to 256 entries for now. Add ip(4) internet protocol version 4 support. IP fragmentation and options are not implemented yet. Add tcp(4) transmission control protocol sockets for a reliable transport layer protocol that prov...
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