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Pull request: 2704 local resolvers vol.1

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Merge in DNS/adguard-home from 2704-local-addresses-vol.1 to master

Updates #2704.
Updates #2829.
Updates #2846.

Squashed commit of the following:

commit 9a49b3d27edcb30da7f16a065226907833b1dc81
Author: Eugene Burkov <e.burkov@adguard.com>
Date:   Mon Mar 22 15:39:17 2021 +0300

    aghnet: imp docs and logging

commit 74f95a29c55b9e732276601b0ecc63fb7c3a9f9e
Author: Eugene Burkov <e.burkov@adguard.com>
Date:   Fri Mar 19 20:56:51 2021 +0300

    all: fix friday evening mistakes

commit 0e2066bc5c16ed807fa601780b99e154502361a9
Author: Eugene Burkov <e.burkov@adguard.com>
Date:   Fri Mar 19 20:51:15 2021 +0300

    all: upd testify, imp code quality

commit 8237c50b670c58361ccf7adec3ff2452b1196677
Author: Eugene Burkov <e.burkov@adguard.com>
Date:   Fri Mar 19 20:19:29 2021 +0300

    aghnet: imp test naming

commit 14eb1e189339554c0a6d38e2ba7a93917774ebab
Author: Eugene Burkov <e.burkov@adguard.com>
Date:   Fri Mar 19 19:41:43 2021 +0300

    aghnet: isolate windows-specific functionality

commit d461ac8b18c187999da3e3aba116571b7ebe6785
Author: Eugene Burkov <e.burkov@adguard.com>
Date:   Fri Mar 19 14:50:05 2021 +0300

    aghnet: imp code quality

commit d0ee01cb1f8613de2085c0f2f2f396e46beb52a5
Author: Eugene Burkov <e.burkov@adguard.com>
Date:   Fri Mar 19 11:59:10 2021 +0300

    all: mv funcs to agherr, mk system resolvers getter
This commit is contained in:
Eugene Burkov
2021-03-22 16:46:36 +03:00
parent eb9526cc92
commit 3b2f5d7842
19 changed files with 568 additions and 48 deletions
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22
internal/aghnet/net.go
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@@ -251,3 +251,25 @@ func ErrorIsAddrInUse(err error) bool {
return errErrno == syscall.EADDRINUSE
}
// SplitHost is a wrapper for net.SplitHostPort for the cases when the hostport
// does not necessarily contain a port.
func SplitHost(hostport string) (host string, err error) {
host, _, err = net.SplitHostPort(hostport)
if err != nil {
// Check for the missing port error. If it is that error, just
// use the host as is.
//
// See the source code for net.SplitHostPort.
const missingPort = "missing port in address"
addrErr := &net.AddrError{}
if !errors.As(err, &addrErr) || addrErr.Err != missingPort {
return "", err
}
host = hostport
}
return host, nil
}