65 lines
2.1 KiB
Objective-C
65 lines
2.1 KiB
Objective-C
//
|
|
// PacketMacros.h
|
|
// TunnelKit
|
|
//
|
|
// Created by Davide De Rosa on 11/07/2018.
|
|
// Copyright © 2018 London Trust Media. All rights reserved.
|
|
//
|
|
|
|
#import <Foundation/Foundation.h>
|
|
|
|
#define PacketPeerIdDisabled 0xffffffu
|
|
#define PacketIdLength 4
|
|
|
|
typedef NS_ENUM(uint8_t, PacketCode) {
|
|
PacketCodeSoftResetV1 = 0x03,
|
|
PacketCodeControlV1 = 0x04,
|
|
PacketCodeAckV1 = 0x05,
|
|
PacketCodeDataV1 = 0x06,
|
|
PacketCodeHardResetClientV2 = 0x07,
|
|
PacketCodeHardResetServerV2 = 0x08,
|
|
PacketCodeDataV2 = 0x09,
|
|
PacketCodeUnknown = 0xff
|
|
};
|
|
|
|
extern const uint8_t DataPacketLZONoCompress;
|
|
extern const uint8_t DataPacketPingData[16];
|
|
|
|
static inline int PacketHeaderSet(uint8_t *_Nonnull to, PacketCode code, uint8_t key)
|
|
{
|
|
*(uint8_t *)to = (code << 3) | (key & 0b111);
|
|
return sizeof(uint8_t);
|
|
}
|
|
|
|
// Ruby: header
|
|
static inline NSData *_Nonnull PacketWithHeader(PacketCode code, uint8_t key, NSData *sessionId)
|
|
{
|
|
NSMutableData *to = [[NSMutableData alloc] initWithLength:(sizeof(uint8_t) + (sessionId ? sessionId.length : 0))];
|
|
const int offset = PacketHeaderSet(to.mutableBytes, code, key);
|
|
if (sessionId) {
|
|
memcpy(to.mutableBytes + offset, sessionId.bytes, sessionId.length);
|
|
}
|
|
return to;
|
|
}
|
|
|
|
static inline int PacketHeaderSetDataV2(uint8_t *_Nonnull to, uint8_t key, uint32_t peerId)
|
|
{
|
|
*(uint32_t *)to = ((PacketCodeDataV2 << 3) | (key & 0b111)) | htonl(peerId & 0xffffff);
|
|
return sizeof(uint32_t);
|
|
}
|
|
|
|
static inline int PacketHeaderGetDataV2PeerId(const uint8_t *_Nonnull from)
|
|
{
|
|
return ntohl(*(const uint32_t *)from & 0xffffff00);
|
|
}
|
|
|
|
static inline NSData *_Nonnull PacketWithHeaderDataV2(uint8_t key, uint32_t peerId, NSData *sessionId)
|
|
{
|
|
NSMutableData *to = [[NSMutableData alloc] initWithLength:(sizeof(uint32_t) + (sessionId ? sessionId.length : 0))];
|
|
const int offset = PacketHeaderSetDataV2(to.mutableBytes, key, peerId);
|
|
if (sessionId) {
|
|
memcpy(to.mutableBytes + offset, sessionId.bytes, sessionId.length);
|
|
}
|
|
return to;
|
|
}
|