mirror of
https://github.com/melonDS-emu/melonDS.git
synced 2025-07-26 07:39:56 -06:00
(untested yet) code for sending and receiving packets via sockets
MAC randomization
This commit is contained in:
@ -48,6 +48,9 @@ namespace Platform
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socket_t MPSocket;
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sockaddr_t MPSendAddr;
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u8 PacketBuffer[2048];
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#define NIFI_VER 1
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bool MP_Init()
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@ -114,5 +117,73 @@ void MP_DeInit()
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#endif // __WXMSW__
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}
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int MP_SendPacket(u8* data, int len, int rate)
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{
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if (MPSocket < 0)
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return 0;
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if (len > 2048-8)
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{
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printf("MP_SendPacket: error: packet too long (%d)\n", len);
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return 0;
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}
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*(u32*)&PacketBuffer[0] = htonl(0x4946494E); // NIFI
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PacketBuffer[4] = NIFI_VER;
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PacketBuffer[5] = rate & 0xFF;
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*(u16*)&PacketBuffer[6] = htons(len);
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memcpy(&PacketBuffer[8], data, len);
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return sendto(MPSocket, (const char*)PacketBuffer, len+8, 0, &MPSendAddr, sizeof(sockaddr_t));
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}
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int MP_RecvPacket(u8* data, bool block, int* rate)
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{
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if (MPSocket < 0)
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return 0;
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fd_set fd;
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struct timeval tv;
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FD_ZERO(&fd);
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FD_SET(MPSocket, &fd);
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tv.tv_sec = 0;
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tv.tv_usec = 0;
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if (!select(1, &fd, 0, 0, &tv))
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{
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return 0;
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}
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sockaddr_t fromAddr;
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socklen_t fromLen = sizeof(sockaddr_t);
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int rlen = recvfrom(MPSocket, (char*)PacketBuffer, 2048, 0, &fromAddr, &fromLen);
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if (rlen < 8+24)
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{
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return 0;
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}
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rlen -= 8;
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if (ntohl(*(u32*)&PacketBuffer[0]) != 0x4946494E)
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{
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return 0;
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}
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if (PacketBuffer[4] != NIFI_VER)
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{
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return 0;
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}
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rlen -= 8;
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if (ntohs(*(u16*)&PacketBuffer[6]) != rlen)
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{
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return 0;
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}
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memcpy(data, &PacketBuffer[8], rlen);
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if (rate) *rate = PacketBuffer[5];
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return rlen;
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}
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}
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