diff options
Diffstat (limited to 'dhcpv4/ztpv4/ztp.go')
-rw-r--r-- | dhcpv4/ztpv4/ztp.go | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/dhcpv4/ztpv4/ztp.go b/dhcpv4/ztpv4/ztp.go new file mode 100644 index 0000000..d8c507a --- /dev/null +++ b/dhcpv4/ztpv4/ztp.go @@ -0,0 +1,78 @@ +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("failed to parse vendor option data") +} |