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package ztpv4
import (
"errors"
"strings"
"github.com/insomniacslk/dhcp/dhcpv4"
)
// VendorData is optional data a particular vendor may or may not include
// in the Vendor Class options.
type VendorData struct {
VendorName, Model, Serial string
}
var errVendorOptionMalformed = errors.New("malformed vendor option")
// ParseVendorData will try to parse dhcp4 options looking for more
// specific vendor data (like model, serial number, etc).
func ParseVendorData(packet *dhcpv4.DHCPv4) (*VendorData, error) {
opt := packet.GetOneOption(dhcpv4.OptionClassIdentifier)
if opt == nil {
return nil, errors.New("vendor options not found")
}
vc := opt.(*dhcpv4.OptClassIdentifier).Identifier
vd := &VendorData{}
switch {
// Arista;DCS-7050S-64;01.23;JPE12221671
case strings.HasPrefix(vc, "Arista;"):
p := strings.Split(vc, ";")
if len(p) < 4 {
return nil, errVendorOptionMalformed
}
vd.VendorName = p[0]
vd.Model = p[1]
vd.Serial = p[3]
return vd, nil
// ZPESystems:NSC:002251623
case strings.HasPrefix(vc, "ZPESystems:"):
p := strings.Split(vc, ":")
if len(p) < 3 {
return nil, errVendorOptionMalformed
}
vd.VendorName = p[0]
vd.Model = p[1]
vd.Serial = p[2]
return vd, nil
// Juniper option 60 parsing is a bit more nuanced. The following are all
// "valid" identifying stings for Juniper:
// Juniper-ptx1000-DD576 <vendor>-<model>-<serial
// Juniper-qfx10008 <vendor>-<model> (serial in hostname option)
// Juniper-qfx10002-361-DN817 <vendor>-<model>-<serial> (model has a dash in it!)
case strings.HasPrefix(vc, "Juniper-"):
p := strings.Split(vc, "-")
if len(p) < 3 {
vd.Model = p[1]
if opt := packet.GetOneOption(dhcpv4.OptionHostName); opt != nil {
vd.Serial = opt.(*dhcpv4.OptHostName).HostName
} else {
return nil, errors.New("host name option is missing")
}
} else {
vd.Model = strings.Join(p[1:len(p)-1], "-")
vd.Serial = p[len(p)-1]
}
vd.VendorName = p[0]
return vd, nil
}
// We didn't match anything.
return nil, errors.New("no known ZTP vendor found")
}
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