| 1 |  | #include "Flatline.h" | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 2 |  |  | 
 
 
 
 
 
 
 
 
 
 
 | 3 | < | bool Net_Listen(uint16_t port, bool (*packet_callback)(char* data, int datalen, int from)) | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 4 | < | { | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 5 | < | int sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 6 | < |  | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 7 | < | if (sock < 0) | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 8 | < | { | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 9 | < | DDrStartupMessage("could not create socket"); | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 10 | < | return false; | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 11 | < | } | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 12 | < |  | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 13 | < | sockaddr_in address; | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 14 | < | memset(&address, 0, sizeof(sockaddr_in)); | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 15 | < | address.sin_family = AF_INET; | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 16 | < | address.sin_addr.s_addr = htonl(INADDR_ANY); | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 17 | < | address.sin_port = htons(port); | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 18 | < |  | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 19 | < | if (bind(sock, (sockaddr*)&address, sizeof(sockaddr_in)) < 0) | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 20 | < | { | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 21 | < | DDrStartupMessage("could not bind port %d", port); | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 22 | < | closesocket(sock); | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 23 | < | return false; | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 24 | < | } | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 25 | < |  | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 26 | < | char data[65537]; | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 27 | < | data[sizeof(data) - 1] = '\0'; | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 28 | < | sockaddr_in from; | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 29 | < | int recvlen; | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 30 | < | for (;;) | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 31 | < | { | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 32 | < | int fromlen = sizeof(sockaddr_in); | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 33 | < | memset(&from, 0, sizeof(sockaddr_in)); | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 34 | < | recvlen = recvfrom(sock, data, sizeof(data) - 1, 0, (sockaddr*)&from, (void*)&fromlen); | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 35 | < | if (!packet_callback(data, recvlen, ntohl(from.sin_addr.s_addr))) | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 36 | < | break; | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 37 | < | } | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 38 | < | closesocket(sock); | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 39 | < | return true; | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 40 | < | } | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 41 | < |  | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 42 | < | int Net_CreateSocket(uint16_t port) | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 43 | < | { | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 44 | < | int sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 45 | < |  | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 46 | < | if (sock < 0) | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 47 | < | { | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 48 | < | DDrStartupMessage("could not create socket"); | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 49 | < | return -1; | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 50 | < | } | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 51 | < |  | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 52 | < | sockaddr_in address; | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 53 | < | memset(&address, 0, sizeof(sockaddr_in)); | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 54 | < | address.sin_family = AF_INET; | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 55 | < | address.sin_addr.s_addr = htonl(INADDR_ANY); | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 56 | < | address.sin_port = htons(port); | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 57 | < |  | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 58 | < | if (bind(sock, (sockaddr*)&address, sizeof(sockaddr_in)) < 0) | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 59 | < | { | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 60 | < | DDrStartupMessage("could not bind port %d", port); | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 61 | < | return false; | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 62 | < | } | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 63 | < |  | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 64 | < | unsigned long nonBlocking = 1; | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 65 | < | if (ioctlsocket(sock, FIONBIO, &nonBlocking)) | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 66 | < | { | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 67 | < | DDrStartupMessage("failed to set non-blocking socket"); | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 68 | < | return false; | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 69 | < | } | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 70 | < |  | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 71 | < | return sock; | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 72 | < | } | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 73 | < |  | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 74 | < | bool Net_Send(int socket, int ip, uint16_t port, char* data, int datalen) | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 75 | < | { | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 76 | < | sockaddr_in address; | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 77 | < | memset(&address, 0, sizeof(sockaddr_in)); | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 78 | < | address.sin_family = AF_INET; | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 79 | < | address.sin_addr.s_addr = ip; | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 80 | < | address.sin_port = htons(port); | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 81 | < |  | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 82 | < | return sendto(socket, data, datalen, 0, (sockaddr*)&address, sizeof(address)); | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 83 | < | } | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 84 | < |  | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 85 | < | void Net_CloseSocket(int sock) | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 86 | < | { | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 87 | < | closesocket(sock); | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 88 | < | } | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 89 | < |  | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 90 | < | bool FLrListen_PacketCallback(char* data, int datalen, int from) | 
 
 
 
 
 
 
 
 
 | 3 | > | bool FLrServer_PacketCallback(char* data, int datalen, int from) | 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 | 4 |  | { | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 5 |  | static int recieved = 0; | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 6 |  |  | 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 | 10 |  | return true; | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 11 |  | } | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 12 |  |  | 
 
 
 
 
 
 
 
 
 
 
 | 13 | < | bool FLrListen_Run() | 
 
 
 
 
 
 
 
 
 | 13 | > | bool FLrServer_Run() | 
 
 
 
 
 
 
 
 
 
 
 | 14 |  | { | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 15 |  | return Net_Listen(27777, FLrListen_PacketCallback); | 
 
 
 
 
 
 
 
 
 
 
 
 
 | 16 |  | } |