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// This file is part of gnunet-go, a GNUnet-implementation in Golang.
// Copyright (C) 2019-2022 Bernd Fix >Y<
//
// gnunet-go is free software: you can redistribute it and/or modify it
// under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License,
// or (at your option) any later version.
//
// gnunet-go is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
// SPDX-License-Identifier: AGPL3.0-or-later
package message
import (
"encoding/hex"
"fmt"
"gnunet/crypto"
"gnunet/service/dht/blocks"
"gnunet/util"
)
//----------------------------------------------------------------------
// NAMECACHE_LOOKUP_BLOCK
//----------------------------------------------------------------------
// NamecacheLookupMsg is request message for lookups in local namecache
type NamecacheLookupMsg struct {
MsgSize uint16 `order:"big"` // total size of message
MsgType uint16 `order:"big"` // NAMECACHE_LOOKUP_BLOCK (431)
ID uint32 `order:"big"` // Request Id
Query *crypto.HashCode // Query data
}
// NewNamecacheLookupMsg creates a new default message.
func NewNamecacheLookupMsg(query *crypto.HashCode) *NamecacheLookupMsg {
if query == nil {
query = crypto.NewHashCode(nil)
}
return &NamecacheLookupMsg{
MsgSize: 72,
MsgType: NAMECACHE_LOOKUP_BLOCK,
ID: 0,
Query: query,
}
}
// String returns a human-readable representation of the message.
func (m *NamecacheLookupMsg) String() string {
return fmt.Sprintf("NamecacheLookupMsg{Id=%d,Query=%s}",
m.ID, hex.EncodeToString(m.Query.Bits))
}
// Header returns the message header in a separate instance.
func (m *NamecacheLookupMsg) Header() *Header {
return &Header{m.MsgSize, m.MsgType}
}
//----------------------------------------------------------------------
// NAMECACHE_LOOKUP_BLOCK_RESPONSE
//----------------------------------------------------------------------
// NamecacheLookupResultMsg is the response message for namecache lookups.
type NamecacheLookupResultMsg struct {
MsgSize uint16 `order:"big"` // total size of message
MsgType uint16 `order:"big"` // NAMECACHE_LOOKUP_BLOCK_RESPONSE (432)
ID uint32 `order:"big"` // Request Id
Expire util.AbsoluteTime `` // Expiration time
DerivedKeySig *crypto.ZoneSignature `` // Derived public key
EncData []byte `size:"*"` // Encrypted block data
}
// NewNamecacheLookupResultMsg creates a new default message.
func NewNamecacheLookupResultMsg() *NamecacheLookupResultMsg {
return &NamecacheLookupResultMsg{
MsgSize: 112,
MsgType: NAMECACHE_LOOKUP_BLOCK_RESPONSE,
ID: 0,
Expire: *new(util.AbsoluteTime),
DerivedKeySig: nil,
EncData: nil,
}
}
// String returns a human-readable representation of the message.
func (m *NamecacheLookupResultMsg) String() string {
return fmt.Sprintf("NamecacheLookupResultMsg{id=%d,expire=%s}",
m.ID, m.Expire)
}
// Header returns the message header in a separate instance.
func (m *NamecacheLookupResultMsg) Header() *Header {
return &Header{m.MsgSize, m.MsgType}
}
//----------------------------------------------------------------------
// NAMECACHE_CACHE_BLOCK
//----------------------------------------------------------------------
// NamecacheCacheMsg is the request message to put a name into the local cache.
type NamecacheCacheMsg struct {
MsgSize uint16 `order:"big"` // total size of message
MsgType uint16 `order:"big"` // NAMECACHE_CACHE_BLOCK (433)
ID uint32 `order:"big"` // Request Id
Expire util.AbsoluteTime `` // Expiration time
DerivedKeySig *crypto.ZoneSignature `` // Derived public key and signature
EncData []byte `size:"*"` // Encrypted block data
}
// NewNamecacheCacheMsg creates a new default message.
func NewNamecacheCacheMsg(block *blocks.GNSBlock) *NamecacheCacheMsg {
msg := &NamecacheCacheMsg{
MsgSize: 108,
MsgType: NAMECACHE_BLOCK_CACHE,
ID: 0,
Expire: *new(util.AbsoluteTime),
DerivedKeySig: nil,
EncData: make([]byte, 0),
}
if block != nil {
msg.DerivedKeySig = block.DerivedKeySig
msg.Expire = block.Body.Expire
size := len(block.Body.Data)
msg.EncData = make([]byte, size)
copy(msg.EncData, block.Body.Data)
msg.MsgSize += uint16(size)
}
return msg
}
// String returns a human-readable representation of the message.
func (m *NamecacheCacheMsg) String() string {
return fmt.Sprintf("NewNamecacheCacheMsg{id=%d,expire=%s}",
m.ID, m.Expire)
}
// Header returns the message header in a separate instance.
func (m *NamecacheCacheMsg) Header() *Header {
return &Header{m.MsgSize, m.MsgType}
}
//----------------------------------------------------------------------
// NAMECACHE_BLOCK_CACHE_RESPONSE
//----------------------------------------------------------------------
// NamecacheCacheResponseMsg is the reponse message for a put request
type NamecacheCacheResponseMsg struct {
MsgSize uint16 `order:"big"` // total size of message
MsgType uint16 `order:"big"` // NAMECACHE_LOOKUP_BLOCK_RESPONSE (432)
ID uint32 `order:"big"` // Request Id
Result int32 `order:"big"` // Result code
}
// NewNamecacheCacheResponseMsg creates a new default message.
func NewNamecacheCacheResponseMsg() *NamecacheCacheResponseMsg {
return &NamecacheCacheResponseMsg{
MsgSize: 12,
MsgType: NAMECACHE_BLOCK_CACHE_RESPONSE,
ID: 0,
Result: 0,
}
}
// String returns a human-readable representation of the message.
func (m *NamecacheCacheResponseMsg) String() string {
return fmt.Sprintf("NamecacheCacheResponseMsg{id=%d,result=%d}",
m.ID, m.Result)
}
// Header returns the message header in a separate instance.
func (m *NamecacheCacheResponseMsg) Header() *Header {
return &Header{m.MsgSize, m.MsgType}
}
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