From fbfcf8144c1f3deafe13dd3ed6afdb4de0b7c1fd Mon Sep 17 00:00:00 2001
From: Ghanan Gowripalan <ghanan@google.com>
Date: Fri, 16 Oct 2020 10:40:35 -0700
Subject: Enable IPv6 WriteHeaderIncludedPacket

Allow writing an IPv6 packet where the IPv6 header is a provided by
the user.

* Introduce an error to let callers know a header is malformed.
We previously useed tcpip.ErrInvalidOptionValue but that did not seem
appropriate for generic malformed header errors.

* Populate network header in WriteHeaderIncludedPacket
IPv4's implementation of WriteHeaderIncludedPacket did not previously
populate the packet buffer's network header. This change fixes that.

Fixes #4527

Test: ip_test.TestWriteHeaderIncludedPacket
PiperOrigin-RevId: 337534548
---
 pkg/tcpip/tcpip.go | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'pkg/tcpip/tcpip.go')

diff --git a/pkg/tcpip/tcpip.go b/pkg/tcpip/tcpip.go
index c42bb0991..d77848d61 100644
--- a/pkg/tcpip/tcpip.go
+++ b/pkg/tcpip/tcpip.go
@@ -111,6 +111,7 @@ var (
 	ErrBroadcastDisabled         = &Error{msg: "broadcast socket option disabled"}
 	ErrNotPermitted              = &Error{msg: "operation not permitted"}
 	ErrAddressFamilyNotSupported = &Error{msg: "address family not supported by protocol"}
+	ErrMalformedHeader           = &Error{msg: "header is malformed"}
 )
 
 var messageToError map[string]*Error
@@ -159,6 +160,7 @@ func StringToError(s string) *Error {
 			ErrBroadcastDisabled,
 			ErrNotPermitted,
 			ErrAddressFamilyNotSupported,
+			ErrMalformedHeader,
 		}
 
 		messageToError = make(map[string]*Error)
-- 
cgit v1.2.3