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jbus
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Minor reorganization; bind to localhost to prevent Windows Firewall alert

This commit is contained in:
Jack Andersen 2017-01-21 15:38:02 -10:00
parent 9db987d3dd
commit b8c42676ce
4 changed files with 42 additions and 40 deletions
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35
include/jbus/Endpoint.hpp
View File

@ -40,43 +40,12 @@ class Endpoint
u32 xc_progLength;
/* Unwrapped public key */
u32 x20_publicKey;
u32 x20_key;
/* Message authentication code */
u32 x24_authInitCode;
void ProcessGBACrypto()
{
/* Unwrap key from challenge using 'sedo' magic number (to encrypt JoyBoot program) */
x20_publicKey = x0_gbaChallenge ^ 0x6f646573;
/* Pack palette parameters */
u16 paletteSpeedCoded;
s16 logoSpeed = static_cast<s8>(x8_logoSpeed);
if (logoSpeed < 0)
paletteSpeedCoded = ((-logoSpeed + 2) * 2) | (x4_logoPalette << 4);
else if (logoSpeed == 0)
paletteSpeedCoded = (x4_logoPalette * 2) | 0x70;
else /* logo_speed > 0 */
paletteSpeedCoded = ((logoSpeed - 1) * 2) | (x4_logoPalette << 4);
/* JoyBoot ROMs start with a padded header; this is the length beyond that header */
s32 lengthNoHeader = ROUND_UP_8(xc_progLength) - 0x200;
/* The JoyBus protocol transmits in 4-byte packets while flipping a state flag;
* so the GBA BIOS counts the program length in 8-byte packet-pairs */
u16 packetPairCount = (lengthNoHeader < 0) ? 0 : lengthNoHeader / 8;
paletteSpeedCoded |= (packetPairCount & 0x4000) >> 14;
/* Pack together encoded transmission parameters */
u32 t1 = (((packetPairCount << 16) | 0x3f80) & 0x3f80ffff) * 2;
t1 += (static_cast<s16>(static_cast<s8>(t1 >> 8)) & packetPairCount) << 16;
u32 t2 = ((paletteSpeedCoded & 0xff) << 16) + (t1 & 0xff0000) + ((t1 >> 8) & 0xffff00);
u32 t3 = paletteSpeedCoded << 16 | ((t2 << 8) & 0xff000000) | (t1 >> 16) | 0x80808080;
/* Wrap with 'Kawa' or 'sedo' (Kawasedo is the author of the BIOS cipher) */
x24_authInitCode = t3 ^ ((t3 & 0x200) != 0 ? 0x6f646573 : 0x6177614b);
}
void ProcessGBACrypto();
} xf8_dspHmac;
s32 x0_pColor;

10
include/jbus/Socket.hpp
View File

@ -134,7 +134,7 @@ class Socket
m_socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (m_socket == -1)
{
fprintf(stderr, "Can't allocate socket\n");
fprintf(stderr, "jbus: Can't allocate socket\n");
return false;
}
@ -223,14 +223,14 @@ public:
if (bind(m_socket, reinterpret_cast<sockaddr*>(&addr), sizeof(addr)) == -1)
{
/* Not likely to happen, but... */
fprintf(stderr, "Failed to bind listener socket to port %d\n", port);
fprintf(stderr, "jbus: Failed to bind listener socket to port %d\n", port);
return false;
}
if (::listen(m_socket, 0) == -1)
{
/* Oops, socket is deaf */
fprintf(stderr, "Failed to listen to port %d\n", port);
fprintf(stderr, "jbus: Failed to listen to port %d\n", port);
return false;
}
@ -252,11 +252,11 @@ public:
#ifndef _WIN32
EResult res = (errno == EAGAIN) ? EResult::Busy : EResult::Error;
if (res == EResult::Error)
fprintf(stderr, "Failed to accept incoming connection: %s\n", strerror(errno));
fprintf(stderr, "jbus: Failed to accept incoming connection: %s\n", strerror(errno));
#else
EResult res = LastWSAError();
if (res == EResult::Error)
fprintf(stderr, "Failed to accept incoming connection\n");
fprintf(stderr, "jbus: Failed to accept incoming connection\n");
#endif
return res;
}

35
lib/Endpoint.cpp
View File

@ -5,6 +5,39 @@
namespace jbus
{
void Endpoint::KawasedoChallenge::DSPSecParms::ProcessGBACrypto()
{
/* Unwrap key from challenge using 'sedo' magic number (to encrypt JoyBoot program) */
x20_key = x0_gbaChallenge ^ 0x6f646573;
/* Pack palette parameters */
u16 paletteSpeedCoded;
s16 logoSpeed = static_cast<s8>(x8_logoSpeed);
if (logoSpeed < 0)
paletteSpeedCoded = ((-logoSpeed + 2) * 2) | (x4_logoPalette << 4);
else if (logoSpeed == 0)
paletteSpeedCoded = (x4_logoPalette * 2) | 0x70;
else /* logo_speed > 0 */
paletteSpeedCoded = ((logoSpeed - 1) * 2) | (x4_logoPalette << 4);
/* JoyBoot ROMs start with a padded header; this is the length beyond that header */
s32 lengthNoHeader = ROUND_UP_8(xc_progLength) - 0x200;
/* The JoyBus protocol transmits in 4-byte packets while flipping a state flag;
* so the GBA BIOS counts the program length in 8-byte packet-pairs */
u16 packetPairCount = (lengthNoHeader < 0) ? 0 : lengthNoHeader / 8;
paletteSpeedCoded |= (packetPairCount & 0x4000) >> 14;
/* Pack together encoded transmission parameters */
u32 t1 = (((packetPairCount << 16) | 0x3f80) & 0x3f80ffff) * 2;
t1 += (static_cast<s16>(static_cast<s8>(t1 >> 8)) & packetPairCount) << 16;
u32 t2 = ((paletteSpeedCoded & 0xff) << 16) + (t1 & 0xff0000) + ((t1 >> 8) & 0xffff00);
u32 t3 = paletteSpeedCoded << 16 | ((t2 << 8) & 0xff000000) | (t1 >> 16) | 0x80808080;
/* Wrap with 'Kawa' or 'sedo' (Kawasedo is the author of the BIOS cipher) */
x24_authInitCode = t3 ^ ((t3 & 0x200) != 0 ? 0x6f646573 : 0x6177614b);
}
void Endpoint::KawasedoChallenge::_0Reset(ThreadLocalEndpoint& endpoint, EJoyReturn status)
{
if (status != GBA_READY ||
@ -87,7 +120,7 @@ void Endpoint::KawasedoChallenge::_DSPCryptoInit()
void Endpoint::KawasedoChallenge::_DSPCryptoDone(ThreadLocalEndpoint& endpoint)
{
x58_currentKey = xf8_dspHmac.x20_publicKey;
x58_currentKey = xf8_dspHmac.x20_key;
x5c_initMessage = xf8_dspHmac.x24_authInitCode;
x20_byteInWindow = ROUND_UP_8(xc_progLen);

2
lib/Listener.cpp
View File

@ -12,7 +12,7 @@ void Listener::listenerProc()
printf("JoyBus listener started\n");
#endif
net::IPAddress localhost("0.0.0.0");
net::IPAddress localhost("127.0.0.1");
bool dataBound = false;
bool clockBound = false;
while (m_running && (!dataBound || !clockBound))