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Pull request: 3444 reuse port

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Merge in DNS/adguard-home from 3444-dhcp-again to master

Closes #3444.

Squashed commit of the following:

commit 5459ded7d58f219ab5417977e0df17c177c73a4a
Merge: d6559090 8e667d3c
Author: Eugene Burkov <e.burkov@adguard.com>
Date:   Mon Aug 16 15:35:30 2021 +0300

    Merge branch 'master' into 3444-dhcp-again

commit d6559090a21b6b13be6970a3839db1106fb539b8
Author: Eugene Burkov <e.burkov@adguard.com>
Date:   Mon Aug 16 15:28:38 2021 +0300

    aghnet: fix linux

commit 262f729224d73a70d61a4b29d5a4d34502b7b094
Author: Eugene Burkov <e.burkov@adguard.com>
Date:   Mon Aug 16 14:30:09 2021 +0300

    aghnet: rm debug

commit c54b107264f792ec7f17f8d790908408070307d3
Author: Eugene Burkov <e.burkov@adguard.com>
Date:   Mon Aug 16 14:21:07 2021 +0300

    aghnet: imp bsd compat, fix openbsd static ip

commit f9871a4c51d1f5d2c799a8d1308a4d30a47485f6
Author: Eugene Burkov <e.burkov@adguard.com>
Date:   Sat Aug 14 00:17:46 2021 +0300

    aghnet:  setsockopt
This commit is contained in:
Eugene Burkov
2021-08-16 15:53:33 +03:00
parent 8e667d3cc4
commit 784bc318ca
6 changed files with 98 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
internal/aghnet/dhcp_unix.go
View File

@@ -112,12 +112,12 @@ func discover4(iface *net.Interface, dstAddr *net.UDPAddr, hostname string) (ok
// It's also known that listening on the specified interface's address
// ignores broadcasted packets when reading.
var c net.PacketConn
if c, err = net.ListenPacket("udp4", ":68"); err != nil {
if c, err = listenPacketReusable(iface.Name, "udp4", ":68"); err != nil {
return false, fmt.Errorf("couldn't listen on :68: %w", err)
}
defer func() { err = errors.WithDeferred(err, c.Close()) }()
// Send to resolved broadcast.
// Send to broadcast.
if _, err = c.WriteTo(req.ToBytes(), dstAddr); err != nil {
return false, fmt.Errorf("couldn't send a packet to %s: %w", dstAddr, err)
}
@@ -154,9 +154,6 @@ func tryConn4(req *dhcpv4.DHCPv4, c net.PacketConn, iface *net.Interface) (ok, n
b := make([]byte, 1500)
n, _, err := c.ReadFrom(b)
if n > 0 {
log.Debug("received %d bytes: %v", n, b)
}
if err != nil {
if isTimeout(err) {
log.Debug("dhcpv4: didn't receive dhcp response")