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(untested yet) code for sending and receiving packets via sockets

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MAC randomization
This commit is contained in:
StapleButter
2017-05-11 23:43:57 +02:00
parent e9a24b4d06
commit 01361f006e
3 changed files with 89 additions and 0 deletions
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71
src/wx/Platform.cpp
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@ -48,6 +48,9 @@ namespace Platform
socket_t MPSocket;
sockaddr_t MPSendAddr;
u8 PacketBuffer[2048];
#define NIFI_VER 1
bool MP_Init()
@ -114,5 +117,73 @@ void MP_DeInit()
#endif // __WXMSW__
}
int MP_SendPacket(u8* data, int len, int rate)
{
if (MPSocket < 0)
return 0;
if (len > 2048-8)
{
printf("MP_SendPacket: error: packet too long (%d)\n", len);
return 0;
}
*(u32*)&PacketBuffer[0] = htonl(0x4946494E); // NIFI
PacketBuffer[4] = NIFI_VER;
PacketBuffer[5] = rate & 0xFF;
*(u16*)&PacketBuffer[6] = htons(len);
memcpy(&PacketBuffer[8], data, len);
return sendto(MPSocket, (const char*)PacketBuffer, len+8, 0, &MPSendAddr, sizeof(sockaddr_t));
}
int MP_RecvPacket(u8* data, bool block, int* rate)
{
if (MPSocket < 0)
return 0;
fd_set fd;
struct timeval tv;
FD_ZERO(&fd);
FD_SET(MPSocket, &fd);
tv.tv_sec = 0;
tv.tv_usec = 0;
if (!select(1, &fd, 0, 0, &tv))
{
return 0;
}
sockaddr_t fromAddr;
socklen_t fromLen = sizeof(sockaddr_t);
int rlen = recvfrom(MPSocket, (char*)PacketBuffer, 2048, 0, &fromAddr, &fromLen);
if (rlen < 8+24)
{
return 0;
}
rlen -= 8;
if (ntohl(*(u32*)&PacketBuffer[0]) != 0x4946494E)
{
return 0;
}
if (PacketBuffer[4] != NIFI_VER)
{
return 0;
}
rlen -= 8;
if (ntohs(*(u16*)&PacketBuffer[6]) != rlen)
{
return 0;
}
memcpy(data, &PacketBuffer[8], rlen);
if (rate) *rate = PacketBuffer[5];
return rlen;
}
}