blob: 5e94b050c1aba894c2411810eb078942c16aa4b6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
/* -------------------------------------------
Copyright (C) 2024, Amlal EL Mahrouss, all rights reserved.
------------------------------------------- */
#include <NetworkKit/IPC.h>
#include <KernelKit/LPC.h>
#include <KernelKit/UserProcessScheduler.h>
namespace Kernel
{
/// @internal
/// @brief The internal sanitize function.
Bool ipc_int_sanitize_packet(IPC_MSG* pckt)
{
auto endian = rtl_deduce_endianess(pckt, ((Char*)pckt)[0]);
switch (endian)
{
case Endian::kEndianBig: {
if (pckt->IpcEndianess == kIPCLittleEndian)
goto ipc_check_failed;
break;
}
case Endian::kEndianLittle: {
if (pckt->IpcEndianess == kIPCBigEndian)
goto ipc_check_failed;
break;
}
case Endian::kEndianMixed: {
if (pckt->IpcEndianess == kIPCMixedEndian)
goto ipc_check_failed;
break;
}
default:
goto ipc_check_failed;
}
if (pckt->IpcFrom == pckt->IpcTo ||
pckt->IpcPacketSize > kIPCMsgSize)
{
goto ipc_check_failed;
}
return pckt->IpcPacketSize > 1 && pckt->IpcHeaderMagic == kIPCHeaderMagic;
ipc_check_failed:
err_local_get() = kErrorIPC;
return false;
}
/// @brief Sanitize packet function
/// @retval true packet is correct.
/// @retval false packet is incorrect and process has crashed.
Bool ipc_sanitize_packet(IPC_MSG* pckt)
{
if (!pckt ||
!ipc_int_sanitize_packet(pckt))
{
return false;
}
return true;
}
/// @brief Construct packet function
/// @retval true packet is correct.
/// @retval false packet is incorrect and process has crashed.
Bool ipc_construct_packet(_Output IPC_MSG** pckt_in)
{
// don't act if it's not even valid.
if (!pckt_in)
return false;
if (!*pckt_in)
*pckt_in = new IPC_MSG();
if (*pckt_in)
{
auto endian = rtl_deduce_endianess((*pckt_in), ((Char*)(*pckt_in))[0]);
(*pckt_in)->IpcHeaderMagic = kIPCHeaderMagic;
(*pckt_in)->IpcEndianess = static_cast<UInt8>(endian);
(*pckt_in)->IpcPacketSize = sizeof(IPC_MSG);
(*pckt_in)->IpcTo.UserProcessID = 0;
(*pckt_in)->IpcTo.UserProcessTeam = 0;
(*pckt_in)->IpcFrom.UserProcessID = 0;
(*pckt_in)->IpcFrom.UserProcessTeam = 0;
return Yes;
}
return No;
}
} // namespace Kernel
|
