func (c *client) isCompletePacket(p *dhcp.Packet) bool {
complete := !ip.IsUnspecifiedIP(p.YourIP()) &&
!ip.IsUnspecifiedIP(p.ServerIP())
if !complete {
return false
}
for _, param := range c.params {
switch dhcp4.OptionCode(param) {
case dhcp4.OptionSubnetMask:
ones, bits := p.SubnetMask().Size()
if ones == 0 || bits == 0 {
return false
}
case dhcp4.OptionRouter:
if ip.IsUnspecifiedIP(p.Gateway()) {
return false
}
case dhcp4.OptionDomainNameServer:
if len(p.DNS()) == 0 {
return false
}
}
}
if p.LeaseTime().Seconds() == 0 {
return false
}
return true
}
func (c *client) newClient(ack *dhcp.Packet) (*dhcp4client.Client, error) {
conn, err := dhcp4client.NewInetSock(dhcp4client.SetRemoteAddr(net.UDPAddr{IP: ack.ServerIP(), Port: 67}))
if err != nil {
return nil, err
}
cl, err := dhcp4client.New(dhcp4client.Connection(conn), dhcp4client.Timeout(c.timeout))
if err != nil {
return nil, err
}
return cl, nil
}
func isCompletePacket(p *dhcp.Packet) bool {
complete := !ip.IsUnspecifiedIP(p.Gateway()) &&
!ip.IsUnspecifiedIP(p.YourIP()) &&
!ip.IsUnspecifiedIP(p.ServerIP())
if !complete {
return false
}
ones, bits := p.SubnetMask().Size()
if ones == 0 || bits == 0 {
return false
}
if p.LeaseTime().Seconds() == 0 {
return false
}
return true
}