81 lines
1.6 KiB
C
81 lines
1.6 KiB
C
#include <stddef.h>
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#include "general.h"
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#include "settings.h"
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#include "wireless.h"
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SOCKET listener;
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SOCKET client;
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struct sockaddr_in client_in;
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int sockaddr_in_sizePtr = (int)sizeof(struct sockaddr_in);
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struct packet buffer;
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char hostName[80];
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void initNetwork(void) {
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WSADATA wsaData;
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WSAStartup(MAKEWORD(2, 2), &wsaData);
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if(gethostname(hostName, sizeof(hostName)) == SOCKET_ERROR) {
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error("gethostname()");
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}
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}
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void printIPs(void) {
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struct hostent *phe = gethostbyname(hostName);
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if(phe == 0) {
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error("gethostbyname()");
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}
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int i;
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for(i = 0; phe->h_addr_list[i] != 0; i++) {
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struct in_addr addr;
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memcpy(&addr, phe->h_addr_list[i], sizeof(struct in_addr));
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printf("%s\n", inet_ntoa(addr));
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}
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if(i) {
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printf("Usually you want the first one.\n");
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}
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}
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void startListening(void) {
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int nret;
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listener = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
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if(listener == INVALID_SOCKET) {
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error("socket()");
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}
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SOCKADDR_IN serverInfo;
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serverInfo.sin_family = AF_INET;
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serverInfo.sin_addr.s_addr = IP;
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serverInfo.sin_port = htons(settings.port);
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u_long one = 1;
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ioctlsocket(listener, FIONBIO, &one);
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nret = bind(listener, (LPSOCKADDR)&serverInfo, sizeof(struct sockaddr));
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if(nret == SOCKET_ERROR) {
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error("bind()");
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}
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}
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void sendBuffer(int length) {
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if(sendto(listener, (char *)&buffer, length, 0, (struct sockaddr *)&client_in, sizeof(struct sockaddr_in)) != length) {
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error("sendto");
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}
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}
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int receiveBuffer(int length) {
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return recvfrom(listener, (char *)&buffer, length, 0, (struct sockaddr *)&client_in, &sockaddr_in_sizePtr);
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}
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