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Steven Hartland b9c9cbf926 net: only enable broadcast on sockets which support it 
Only enable broadcast on SOCK_DGRAM and SOCK_RAW sockets, SOCK_STREAM
and others don't support it.

Don't enable SO_BROADCAST on UNIX domain sockets as they don't support it.

This caused failures on WSL which strictly checks setsockopt calls
unlike other OSes which often silently ignore bad options.

Also return error for setsockopt call for SO_BROADCAST on Windows
matching all other platforms but for IPv4 only as it's not supported
on IPv6 as per:
https://docs.microsoft.com/en-us/windows/win32/winsock/socket-options

Fixes #38954

Change-Id: I0503fd1ce96102b17121af548b66b3e9c2bb80d3
Reviewed-on: https://go-review.googlesource.com/c/go/+/232807
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2020-05-09 00:33:27 +00:00
.github .github: add link to questions in ISSUE_TEMPLATE 2020-01-06 17:05:31 +00:00
api all: remove scattered remnants of darwin/386 2020-04-08 18:37:38 +00:00
doc syscall: if Setctty, require that Ctty be a child descriptor 2020-05-01 21:57:29 +00:00
lib/time lib/time, time/tzdata: update tz data to 2020a 2020-04-30 08:07:39 +00:00
misc cmd/cgo: use type aliases for #define type macros 2020-05-01 18:01:28 +00:00
src net: only enable broadcast on sockets which support it 2020-05-09 00:33:27 +00:00
test cmd/compile: improve error when setting unexported fields 2020-05-08 20:44:01 +00:00
.gitattributes build: force all Windows batch files to CRLF 2020-03-22 08:42:38 +00:00
.gitignore .gitignore: ignore src/cmd/dist/dist 2017-10-28 21:55:49 +00:00
AUTHORS A+C: add Alexey Semenyuk (individual CLA) 2020-05-01 19:36:54 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS C: update email address for Isfan Azhabil 2020-05-07 22:00:07 +00:00
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README.md

The Go Programming Language

Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.

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Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.

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Contributing

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To contribute, please read the contribution guidelines: https://golang.org/doc/contribute.html

Note that the Go project uses the issue tracker for bug reports and proposals only. See https://golang.org/wiki/Questions for a list of places to ask questions about the Go language.