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38 lines
1.1 KiB
Go
38 lines
1.1 KiB
Go
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//go:build freebsd || openbsd
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// +build freebsd openbsd
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package dhcpd
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import (
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"net"
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"github.com/AdguardTeam/golibs/log"
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"github.com/insomniacslk/dhcp/dhcpv4"
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)
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// broadcast sends resp to the broadcast address specific for network interface.
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func (s *v4Server) broadcast(peer net.Addr, conn net.PacketConn, resp *dhcpv4.DHCPv4) {
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// peer is expected to be of type *net.UDPConn as the server4.NewServer
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// initializes it.
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udpPeer, ok := peer.(*net.UDPAddr)
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if !ok {
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log.Error("dhcpv4: peer is of unexpected type %T", peer)
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return
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}
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// Despite the fact that server4.NewIPv4UDPConn explicitly sets socket
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// options to allow broadcasting, it also binds the connection to a
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// specific interface. On FreeBSD and OpenBSD conn.WriteTo causes
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// errors while writing to the addresses that belong to another
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// interface. So, use the broadcast address specific for the binded
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// interface.
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udpPeer.IP = s.conf.broadcastIP
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log.Debug("dhcpv4: sending to %s: %s", peer, resp.Summary())
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if _, err := conn.WriteTo(resp.ToBytes(), peer); err != nil {
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log.Error("dhcpv4: conn.Write to %s failed: %s", peer, err)
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}
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}
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