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package ztpv6
import (
"errors"
"strings"
"github.com/insomniacslk/dhcp/dhcpv6"
)
var (
errVendorOptionMalformed = errors.New("malformed vendor option")
)
// VendorData contains fields extracted from Option 17 data
type VendorData struct {
VendorName, Model, Serial string
}
// ParseVendorData will try to parse dhcp6 Vendor Specific Information options
// ( 16 and 17) data looking for more specific vendor data (like model, serial
// number, etc). If the options are missing we will just return nil
func ParseVendorData(packet dhcpv6.DHCPv6) (*VendorData, error) {
// check for both options 16 and 17 if both are present will use opt 17
opt16 := packet.GetOneOption(dhcpv6.OptionVendorClass)
opt17 := packet.GetOneOption(dhcpv6.OptionVendorOpts)
if (opt16 == nil) && (opt17 == nil) {
return nil, errors.New("no vendor options or vendor class found")
}
vd := VendorData{}
vData := []string{}
if opt17 != nil {
vo := opt17.(*dhcpv6.OptVendorOpts).VendorOpts
for _, opt := range vo {
vData = append(vData, string(opt.(*dhcpv6.OptionGeneric).OptionData))
}
} else {
data := opt16.(*dhcpv6.OptVendorClass).Data
for _, d := range data {
vData = append(vData, string(d))
}
}
for _, d := range vData {
switch {
// Arista;DCS-0000;00.00;ZZZ00000000
case strings.HasPrefix(d, "Arista;"):
p := strings.Split(d, ";")
if len(p) < 4 {
return nil, errVendorOptionMalformed
}
vd.VendorName = p[0]
vd.Model = p[1]
vd.Serial = p[3]
return &vd, nil
// ZPESystems:NSC:000000000
case strings.HasPrefix(d, "ZPESystems:"):
p := strings.Split(d, ":")
if len(p) < 3 {
return nil, errVendorOptionMalformed
}
vd.VendorName = p[0]
vd.Model = p[1]
vd.Serial = p[2]
return &vd, nil
}
}
return nil, errors.New("failed to parse vendor option data")
}
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