This change implements ICMP extensions for interface and next-hop
identification which are used for route trace applications as described
in RFC 5837.

Change-Id: I2435109b5e766e743b894b0280a537324975489d
Reviewed-on: https://go-review.googlesource.com/3112Reviewed-by: Ian Lance Taylor <iant@golang.org>

The point of the DoSomething function is to protect the user from
DoSomethingSlow, which presumably doesn't support returning early upon
cancellation and deadline expiration (or else DoSomething wouldn't need
to exist).

Since most of the point of the Context object is communicating deadline
and cancellation, it is misleading for DoSomethingSlow to accept a
context object. A function like DoSomething is only likely to be written
when wrapping other code that doesn't properly support contexts.

Change-Id: Ibdef5b7ed71387ba6a09179ef2f911fc3f98e40a
Reviewed-on: https://go-review.googlesource.com/3902Reviewed-by: Sameer Ajmani <sameer@golang.org>

This change implements ICMP multi-part message marshaler, parser and
extensions for MPLS which are used for route trace applications as
described in RFC 4950.

API breaking changes:

type MessageBody interface, Len() int
type Extension interface, Len() int
type Extension interface, Marshal() ([]byte, error)

are replaced with

type MessageBody interface, Len(int) int
type Extension interface, Len(int) int
type Extension interface, Marshal(int) ([]byte, error)

Change-Id: Iee1f2e03916d49b8dfe3a89fe682c702d40ecc85
Reviewed-on: https://go-review.googlesource.com/2794Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: I86f0c7695b7888c9cfed4386734cce9f0e05e3fd
Reviewed-on: https://go-review.googlesource.com/3982Reviewed-by: David Symonds <dsymonds@golang.org>

Change-Id: Idcd7c225efda94021ba18ca33f3fe7e8565140fe
Reviewed-on: https://go-review.googlesource.com/3861Reviewed-by: Dave Cheney <dave@cheney.net>
Reviewed-by: Nick Cooper <nmvc@google.com>

Forbidden during copyFiles.

Change-Id: Ica2df08e1e4086c0c6db5a4c90bcf4fefc850bc7
Reviewed-on: https://go-review.googlesource.com/3835Reviewed-by: Dave Cheney <dave@cheney.net>

http://golang.org/pkg/net/http/#ResponseWriter says that "Changing the
header after a call to WriteHeader (or Write) has no effect."

Change-Id: Ica749e1475a93d535adb1300bc599d5cfe49a94f
Reviewed-on: https://go-review.googlesource.com/3689Reviewed-by: Nick Cooper <nmvc@google.com>
Reviewed-by: Nigel Tao <nigeltao@golang.org>

This helps line up HTTP events (in the Go code) with the litmus test
suite (C code).

Change-Id: I2d0847069ae1304948ba1219b63cd438a4fa921c
Reviewed-on: https://go-review.googlesource.com/3760Reviewed-by: Robert Stepanek <robert.stepanek@gmail.com>
Reviewed-by: Nick Cooper <nmvc@google.com>
Reviewed-by: Nigel Tao <nigeltao@golang.org>

Change-Id: I285f93e562ca0c6bdc6168e6c47b28c7caef7cf5
Reviewed-on: https://go-review.googlesource.com/3501Reviewed-by: Nick Cooper <nmvc@google.com>
Reviewed-by: Nigel Tao <nigeltao@golang.org>

Change-Id: I22d47bc4a07911a8c7c57a2db83f5c8ffe1c420c
Reviewed-on: https://go-review.googlesource.com/3565Reviewed-by: Nick Cooper <nmvc@google.com>
Reviewed-by: Nigel Tao <nigeltao@golang.org>

just new files.

Section 10.5 says the Lock-Token applies when creating a new lock, not
just when (implicitly) creating a new file.

The litmus test expects this.

Change-Id: I8746154c9baba9a90b4e9db79cadb6839fc170c7
Reviewed-on: https://go-review.googlesource.com/3567Reviewed-by: Dave Cheney <dave@cheney.net>

Change-Id: I1d91ddf7fb4eebd4782f0621446ec2820d132788
Reviewed-on: https://go-review.googlesource.com/3562Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: If1243dd2d79824933d896a8c4b31db8c247d0c21
Reviewed-on: https://go-review.googlesource.com/3561Reviewed-by: Ian Lance Taylor <iant@golang.org>

These occur after a heap.Remove call, and heap.Remove calls
byExpiry.Pop, which already sets n.byExpiryIndex to -1.

The memLS.consistent method in lock_test.go checks that the expiry
fields are all consistent.

Change-Id: I09f5d02999e4635f15d1723f89a86b951ed95950
Reviewed-on: https://go-review.googlesource.com/3563Reviewed-by: Dave Cheney <dave@cheney.net>
Reviewed-by: Nick Cooper <nmvc@google.com>

Also add a -port flag to litmus_test_server.

13 of 13 copymove tests from the litmus suite pass, as does 16 of 16
basic tests.

Change-Id: Idf92cad281e15db7d4d62e28e366ea7bfa89e564
Reviewed-on: https://go-review.googlesource.com/3470Reviewed-by: Nick Cooper <nmvc@google.com>
Reviewed-by: Robert Stepanek <robert.stepanek@gmail.com>
Reviewed-by: Nigel Tao <nigeltao@golang.org>

Change-Id: I0e4245c26f2a19b366cd22fabefa8d0e65c6b2cc
Reviewed-on: https://go-review.googlesource.com/3560Reviewed-by: Dave Cheney <dave@cheney.net>

Change-Id: I12b41d16b49415081242e06b25a7106a4a0c0442
Reviewed-on: https://go-review.googlesource.com/3402Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: I3cf716c9ae02d7daa0d5a11249c3b58f6c8be2fe
Reviewed-on: https://go-review.googlesource.com/3403Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: I06585ba7e40c1653139520f3d67d96e5d86302ac
Reviewed-on: https://go-review.googlesource.com/3401Reviewed-by: Ian Lance Taylor <iant@golang.org>

This change copies a few code fragments from
https://golang.org/cl/13422044.

Change-Id: I7ceae3a59e15dc9f9ef4b2b64a41753aa9d6798b
Reviewed-on: https://go-review.googlesource.com/3400Reviewed-by: Ian Lance Taylor <iant@golang.org>

This change contains a proposal for marshalling multistatus responses to
support the lock and property systems. In addition, a type for properties
is defined for the to-be-implemented property system.

Change-Id: I3d768d8d61bb9495bc70e4699dee8958d444147f
Reviewed-on: https://go-review.googlesource.com/3160Reviewed-by: Nigel Tao <nigeltao@golang.org>

Change-Id: I92f4d1ede193302af31c56452b425e7ac20c0764
Reviewed-on: https://go-review.googlesource.com/3177Reviewed-by: Dave Cheney <dave@cheney.net>

file name.

This fixes inconsistent stat names after a file is renamed.

Change-Id: Ie90f8abaa31d46a87834266053b61d7770f854e2
Reviewed-on: https://go-review.googlesource.com/3051Reviewed-by: Nick Cooper <nmvc@google.com>
Reviewed-by: Dave Cheney <dave@cheney.net>

Some servers return a websocket url without a port. This patch
automatically adds :80 for ws and :443 for wss.

Change-Id: Ifdcdbda8f87c994a5f351234c83bf4a07be34ea2
Reviewed-on: https://go-review.googlesource.com/2210Reviewed-by: Mikio Hara <mikioh.mikioh@gmail.com>

Change-Id: Ieb3d550d06adc7457ed6870b0dd5fbbfede7c488
Reviewed-on: https://go-review.googlesource.com/3074Reviewed-by: Dave Cheney <dave@cheney.net>

Change-Id: Ib51221be5dbf3a8a4f624ca3bff4b283f311e43b
Reviewed-on: https://go-review.googlesource.com/2757Reviewed-by: Nigel Tao <nigeltao@golang.org>

It will be used by the WebDAV MOVE method.

Change-Id: Iacbcf58af4da0d169271661324537825d4ff887c
Reviewed-on: https://go-review.googlesource.com/2952Reviewed-by: Dave Cheney <dave@cheney.net>

Change-Id: I1e109180673cf3caff4413d12b77422bb072ac50
Reviewed-on: https://go-review.googlesource.com/2950Reviewed-by: Dave Cheney <dave@cheney.net>
Reviewed-by: Nick Cooper <nmvc@google.com>

Fix Dir.OpenFile to not return a nil *os.File (a concrete type) when it
should return a nil webdav.File (an interface type).

Fix memFS.RemoveAll to return nil error instead of os.ErrNotExist when
removing a non-existant file, matching os.RemoveAll's documented
semantics.

Change-Id: I84dfb404aca30e084cd46d6bdc94655aab718bc0
Reviewed-on: https://go-review.googlesource.com/2932Reviewed-by: Nigel Tao <nigeltao@golang.org>

Also fixes parseProtocolNumbers to make it possible to grab the recently
added keyword "deprecated" correctly.

Change-Id: I431da33a722eab9aa13ce1834acab4e9e6346bfd
Reviewed-on: https://go-review.googlesource.com/2852Reviewed-by: Ian Lance Taylor <iant@golang.org>

Also fix memFile.Readdir(n) to return nil error when n <= 0, to match
package os. Fix memFile.Write to fail when writing to directories. Avoid
taking the node lock twice for memFile methods.

Change-Id: I72b0753c9376c3889972662e0454efe67d73479a
Reviewed-on: https://go-review.googlesource.com/2711Reviewed-by: Dave Cheney <dave@cheney.net>
Reviewed-by: Nick Cooper <nmvc@google.com>

Change-Id: I52df24a3128bf6ba5ef82a66fe8b7305f6cc0549
Reviewed-on: https://go-review.googlesource.com/2796Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: Iff9ef2951093883d775373b798dc7612527d888c
Reviewed-on: https://go-review.googlesource.com/2795Reviewed-by: Ian Lance Taylor <iant@golang.org>

or infinity.

Change-Id: I3e3fba8e05a9c6c3db2240311a0813961db81849
Reviewed-on: https://go-review.googlesource.com/2535Reviewed-by: Dave Cheney <dave@cheney.net>

Change-Id: If5745dcc1d66fdaa083d4085440b1535aa75e0da
Reviewed-on: https://go-review.googlesource.com/2430Reviewed-by: Dave Cheney <dave@cheney.net>

Change-Id: I9edeffebf3f22880c4e2d14fa3754415757dcdca

ICMP extension structures allow a few existing ICMP error messages to
convey extra information for troubleshooting; especially the root cause
of why the original datagram could not be delivered.

This CL adds generic support for ICMP extension stuructures to
DstUnreach, TimeExceeded and ParamProb structs. Specific extensions such
as MPLS label-stack, interface and next-hop identification will be
inplemneted in separate followup CLs.

Change-Id: I90798c135bdf76b806e2dde2bdd57c2c11d7e7e9

benchmark                 old ns/op     new ns/op     delta
BenchmarkMemFileWrite     8498028       625563        -92.64%

Change-Id: Iec7dd3931c891c9d6d9d5c6ccd05300b031a5f86

Change-Id: Ic0c1ac9c328360fb591e040c3c837b2ca6234193