// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package route
func (w *wireFormat) parseInterfaceMessage(typ RIBType, b []byte) (Message, error) {
var extOff, bodyOff int
if typ == sysNET_RT_IFLISTL {
if len(b) < 20 {
return nil, errMessageTooShort
}
extOff = int(nativeEndian.Uint16(b[18:20]))
bodyOff = int(nativeEndian.Uint16(b[16:18]))
} else {
extOff = w.extOff
bodyOff = w.bodyOff
}
if len(b) < extOff || len(b) < bodyOff {
return nil, errInvalidMessage
}
l := int(nativeEndian.Uint16(b[:2]))
if len(b) < l {
return nil, errInvalidMessage
}
attrs := uint(nativeEndian.Uint32(b[4:8]))
if attrs&sysRTA_IFP == 0 {
return nil, nil
}
m := &InterfaceMessage{
Version: int(b[2]),
Type: int(b[3]),
Flags: int(nativeEndian.Uint32(b[8:12])),
Index: int(nativeEndian.Uint16(b[12:14])),
Addrs: make([]Addr, sysRTAX_MAX),
extOff: extOff,
raw: b[:l],
}
a, err := parseLinkAddr(b[bodyOff:])
if err != nil {
return nil, err
}
m.Addrs[sysRTAX_IFP] = a
m.Name = a.(*LinkAddr).Name
return m, nil
}
func (w *wireFormat) parseInterfaceAddrMessage(typ RIBType, b []byte) (Message, error) {
var bodyOff int
if typ == sysNET_RT_IFLISTL {
if len(b) < 24 {
return nil, errMessageTooShort
}
bodyOff = int(nativeEndian.Uint16(b[16:18]))
} else {
bodyOff = w.bodyOff
}
if len(b) < bodyOff {
return nil, errInvalidMessage
}
l := int(nativeEndian.Uint16(b[:2]))
if len(b) < l {
return nil, errInvalidMessage
}
m := &InterfaceAddrMessage{
Version: int(b[2]),
Type: int(b[3]),
Flags: int(nativeEndian.Uint32(b[8:12])),
Index: int(nativeEndian.Uint16(b[12:14])),
raw: b[:l],
}
var err error
m.Addrs, err = parseAddrs(uint(nativeEndian.Uint32(b[4:8])), parseKernelInetAddr, b[bodyOff:])
if err != nil {
return nil, err
}
return m, nil
}