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Update README.

This commit is contained in:
whitequark 2017-11-10 02:02:17 +00:00
parent 19373c58c8
commit cee79f30f3
1 changed files with 11 additions and 5 deletions
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README.md
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@ -36,15 +36,21 @@ The only supported internetworking protocol is IPv4.
* IPv4 fragmentation is **not** supported.
* IPv4 options are **not** supported and are silently ignored.
* IPv4 routes (other than the default one) are **not** supported.
### ICMP layer
The ICMPv4 protocol is supported, and ICMP sockets are available.
* ICMPv4 header checksum is supported.
* ICMPv4 echo requests and replies are supported.
* ICMPv4 echo replies are generated in response to echo requests.
* ICMP sockets can listen to ICMPv4 Port Unreachable messages, or any ICMPv4 messages with
a given IPv4 identifier field.
* ICMPv4 protocol unreachable messages are **not** passed to higher layers when received.
* ICMPv4 time exceeded messages are **not** supported.
* ICMPv4 parameter problem messages are **not** supported.
* ICMPv4 parameter problem messages are **not** generated.
### UDP layer
The UDP protocol is supported over IPv4.
The UDP protocol is supported over IPv4, and UDP sockets are available.
* Header checksum is always generated and validated.
* In response to a packet arriving at a port without a listening socket,
@ -52,7 +58,7 @@ The UDP protocol is supported over IPv4.
### TCP layer
The TCP protocol is supported over IPv4. Server and client sockets are supported.
The TCP protocol is supported over IPv4, and server and client TCP sockets are available.
* Header checksum is generated and validated.
* Maximum segment size is negotiated.