if (string[i] >= 'A' && string[i] <= 'Z')			string[i] += diff;	return string;}bool isIP(char *string){	int j = 0;	for (; *string; string++)	{		if (*string == '.')			j++;		else if (*string < '0' || *string > '9')			return 0;	}	if (j == 3)		return 1;	else		return 0;}void clean(request* req){	if (req->file)		fclose(req->file);	if (req->pkt[0])		free(req->pkt[0]);	if (req->pkt[1])		free(req->pkt[1]);	free(req);}DWORD my_inet_addr(char *str){	if (str == NULL)		return INADDR_ANY;	DWORD x = inet_addr(str);	if (x == INADDR_NONE)		return INADDR_ANY;	else		return x;}void init(){	memset(&cfig, 0, sizeof(cfig));	char iniStr[4096];	char name[512];	char value[512];	if (verbatim)	{		cfig.logLevel = 2;		printf("%s\n\n", sVersion);	}	else if (getSection("LOGGING", iniStr, 1, iniFile))	{		char *iniStrPtr = myGetToken(iniStr, 0);		if (!iniStrPtr[0] || !strcasecmp(iniStrPtr, "None"))			cfig.logLevel = 0;		else if (!strcasecmp(iniStrPtr, "Errors"))			cfig.logLevel = 1;		else if (!strcasecmp(iniStrPtr, "All"))			cfig.logLevel = 2;		else if (!strcasecmp(iniStrPtr, "Debug"))			cfig.logLevel = 3;		else		{			cfig.logLevel = 1;			sprintf(logBuff, "Section [LOGGING], Invalid Logging Level: %s, ignored", myGetToken(iniStr, 0));			logMess(logBuff, 1);		}	}	if (!verbatim && cfig.logLevel && logFile[0])	{		FILE *f = fopen(logFile, "wt");		if (f)		{			fprintf(f, "%s\n", sVersion);			fclose(f);		}		else		{			sprintf(iniStr, "Warning: faled to open log file %s", logFile);			syslog(LOG_MAKEPRI(LOG_LOCAL1, LOG_CRIT), iniStr);			logFile[0] = 0;		}	}	FILE *f = fopen(iniFile, "rt");	if (f)		fclose(f);	else	{		sprintf(logBuff, "Warning: Failed to open ini File %s", iniFile);		logMess(logBuff, 1);	}	if (getSection("LISTEN-ON", iniStr, 1, iniFile))	{		char *iniStrPtr = myGetToken(iniStr, 0);		for (int i = 0; i < MAX_SERVERS && iniStrPtr[0]; iniStrPtr = myGetToken(iniStrPtr, 1))		{			WORD port = 69;			mySplit(name, value, iniStrPtr, ':');			if (strlen(value))			{				port = atoi(value);			}			DWORD ip = my_inet_addr(name);			if (isIP(name) && ip)			{				for (BYTE j = 0; j < MAX_SERVERS; j++)				{					if (cfig.servers[j] == ip)						break;					else if (!cfig.servers[j])					{						cfig.servers[j] = ip;						cfig.ports[j] = port;						i++;						break;					}				}			}			else			{				sprintf(logBuff, "Warning: Section [LISTEN-ON], Invalid IP Address %s, ignored", iniStrPtr);				logMess(logBuff, 1);			}		}	}	if (getSection("HOME", iniStr, 1, iniFile))	{		char *iniStrPtr = myGetToken(iniStr, 0);		for (; iniStrPtr[0]; iniStrPtr = myGetToken(iniStrPtr, 1))		{			mySplit(name, value, iniStrPtr, '=');			if (strlen(value))			{				if (!cfig.homes[0].alias[0] && cfig.homes[0].target[0])				{					sprintf(logBuff, "Section [HOME], alias and bare path mixup, entry %s ignored", iniStrPtr);					logMess(logBuff, 1);				}				else if (strchr(name, '/') || strchr(name, '\\') || strchr(name, '>') || strchr(name, '<') || strchr(name, '.'))				{					sprintf(logBuff, "Section [HOME], invalid chars in alias %s, entry ignored", name);					logMess(logBuff, 1);				}				else if (name[0] && strlen(name) < 64 && value[0])				{					for (int i = 0; i < 8; i++)					{						if (cfig.homes[i].alias[0] && !strcasecmp(name, cfig.homes[i].alias))						{							sprintf(logBuff, "Section [HOME], Duplicate Entry: %s ignored", iniStrPtr);							logMess(logBuff, 1);							break;						}						else if (!cfig.homes[i].alias[0])						{							strcpy(cfig.homes[i].alias, name);							strcpy(cfig.homes[i].target, value);							if (cfig.homes[i].target[strlen(cfig.homes[i].target) - 1] != '/')								strcat(cfig.homes[i].target, "/");							break;						}					}				}				else				{					sprintf(logBuff, "Section [HOME], alias name too large", name);					logMess(logBuff, 1);				}			}			else if (!cfig.homes[0].alias[0] && !cfig.homes[0].target[0])			{				strcpy(cfig.homes[0].target, name);				if (cfig.homes[0].target[strlen(cfig.homes[0].target) - 1] != '/')					strcat(cfig.homes[0].target, "/");			}			else if (cfig.homes[0].alias[0])			{				sprintf(logBuff, "Section [HOME], alias and bare path mixup, entry %s ignored", iniStrPtr);				logMess(logBuff, 1);			}			else if (cfig.homes[0].target[0])			{				sprintf(logBuff, "Section [HOME], Duplicate Path: %s ignored", iniStrPtr);				logMess(logBuff, 1);			}			else			{				sprintf(logBuff, "Section [HOME], missing = sign, Invalid Entry: %s ignored", iniStrPtr);				logMess(logBuff, 1);			}		}	}	if (!cfig.homes[0].target[0])	{		strcpy(cfig.homes[0].target, "/home/");	}	if (getSection("TFTP-OPTIONS", iniStr, 1, iniFile))	{		char *iniStrPtr = myGetToken(iniStr, 0);		for (; strlen(iniStrPtr); iniStrPtr = myGetToken(iniStrPtr, 1))		{			mySplit(name, value, iniStrPtr, '=');			if (strlen(value))			{				if (!strcasecmp(name, "blksize"))				{					DWORD tblksize = atol(value);					if (tblksize < 512)						blksize = 512;					else if (tblksize > USHRT_MAX - 32)						blksize = USHRT_MAX - 32;					else						blksize = tblksize;				}				else if (!strcasecmp(name, "timeout"))				{					timeout = atol(value);					if (timeout < 1)						timeout = 1;					else if (timeout > 255)						timeout = 255;				}				else if (!strcasecmp(name, "Read"))				{					if (!strcasecmp(value, "y"))						cfig.fileRead = true;					else						cfig.fileOverwrite = false;				}				else if (!strcasecmp(name, "Write"))				{					if (!strcasecmp(value, "y"))						cfig.fileWrite = true;					else						cfig.fileWrite = false;				}				else if (!strcasecmp(name, "Overwrite"))				{					if (!strcasecmp(value, "y"))						cfig.fileOverwrite = true;					else						cfig.fileOverwrite = false;				}				else				{					sprintf(logBuff, "Warning: unknown option %s, ignored", name);					logMess(logBuff, 1);				}			}		}	}	if (!cfig.fileRead && !cfig.fileWrite && !cfig.fileOverwrite)	{		cfig.fileRead = true;	}	if (getSection("ALLOWED-CLIENTS", iniStr, 1, iniFile))	{		char *iniStrPtr = myGetToken(iniStr, 0);		for (int i = 0; i < 32 && iniStrPtr[0]; iniStrPtr = myGetToken(iniStrPtr, 1))		{			DWORD rs = 0;			DWORD re = 0;			mySplit(name, value, iniStrPtr, '-');			rs = htonl(my_inet_addr(name));			if (strlen(value))				re = htonl(my_inet_addr(value));			else				re = rs;			if (rs && rs != INADDR_NONE && re && re != INADDR_NONE && rs <= re)			{				cfig.hostRanges[i].rangeStart = rs;				cfig.hostRanges[i].rangeEnd = re;				i++;			}			else			{				sprintf(logBuff, "Section [ALLOWED-CLIENTS] Invalid entry %s in ini file, ignored", iniStrPtr);				logMess(logBuff, 1);			}		}	}	if (!cfig.servers[0])		getServ(cfig.servers, cfig.ports, MAX_SERVERS);	int i = 0;	for (int j = 0; j < MAX_SERVERS && cfig.servers[j]; j++)	{		cfig.tftpConn[i].sock = socket(PF_INET,		                              SOCK_DGRAM,		                              IPPROTO_UDP);		if (cfig.tftpConn[i].sock == -1 )		{			sprintf(logBuff, "Failed to Create Socket");			logMess(logBuff, 1);			continue;		}		cfig.tftpConn[i].addr.sin_family = AF_INET;		cfig.tftpConn[i].addr.sin_addr.s_addr = cfig.servers[j];		cfig.tftpConn[i].addr.sin_port = htons(cfig.ports[j]);		int nRet = bind(cfig.tftpConn[i].sock,		                      (sockaddr*)&cfig.tftpConn[i].addr,		                      sizeof(struct sockaddr_in)		                     );		if (nRet == -1)		{			close(cfig.tftpConn[i].sock);			sprintf(logBuff, "%s Port %u, bind failed, %s", IP2String(tempbuff, cfig.servers[j]), cfig.ports[j], strerror(errno));			logMess(logBuff, 1);			continue;		}		if (cfig.maxFD < cfig.tftpConn[i].sock)			cfig.maxFD = cfig.tftpConn[i].sock;		cfig.tftpConn[i].server = cfig.servers[j];		cfig.tftpConn[i].port = cfig.ports[j];		i++;	}	cfig.maxFD++;	if (!cfig.tftpConn[0].server)	{		sprintf(logBuff, "no listening Interfaces available, stopping...");		logMess(logBuff, 1);		exit(-1);	}	else if (verbatim)	{		printf("starting TFTP...\n");	}	else	{		sprintf(logBuff, "starting TFTP Service");		logMess(logBuff, 1);	}	if (cfig.tftpConn[0].server)	{		for (int i = 0; i < 8; i++)			if (cfig.homes[i].target[0])			{				sprintf(logBuff, "alias /%s is mapped to %s", cfig.homes[i].alias, cfig.homes[i].target);				logMess(logBuff, 1);			}		for (int i = 0; i < MAX_SERVERS && cfig.tftpConn[i].server; i++)		{			sprintf(logBuff, "listening On: %s:%i", IP2String(tempbuff, cfig.tftpConn[i].server),cfig.tftpConn[i].port);			logMess(logBuff, 1);		}		if (cfig.hostRanges[0].rangeStart)		{			char temp[128];			for (int i = 0; i <= 32 && cfig.hostRanges[i].rangeStart; i++)			{				sprintf(logBuff, "%s", "permitted clients: ");				sprintf(temp, "%s-", IP2String(tempbuff, htonl(cfig.hostRanges[i].rangeStart)));				strcat(logBuff, temp);				sprintf(temp, "%s", IP2String(tempbuff, htonl(cfig.hostRanges[i].rangeEnd)));				strcat(logBuff, temp);				logMess(logBuff, 1);			}		}		else		{			sprintf(logBuff, "%s", "permitted clients: all");			logMess(logBuff, 1);		}		sprintf(logBuff, "max blksize: %u", blksize);		logMess(logBuff, 1);		sprintf(logBuff, "defult blksize: %u", 512);		logMess(logBuff, 1);		sprintf(logBuff, "default timeout: %u", timeout);		logMess(logBuff, 1);		sprintf(logBuff, "file read allowed: %s", cfig.fileRead ? "Yes" : "No");		logMess(logBuff, 1);		sprintf(logBuff, "file create allowed: %s", cfig.fileWrite ? "Yes" : "No");		logMess(logBuff, 1);		sprintf(logBuff, "file overwrite allowed: %s", cfig.fileOverwrite ? "Yes" : "No");		logMess(logBuff, 1);		if (!verbatim)		{			sprintf(logBuff, "logging: %s", cfig.logLevel > 1 ? "all" : "errors");			logMess(logBuff, 1);		}	}}void logMess(char *logBuff, BYTE logLevel){	if (verbatim)		printf("%s\n", logBuff);	else if (logFile[0] && logLevel <= cfig.logLevel)	{		char currentTime[32];		time_t t = time(NULL);		tm *ttm = localtime(&t);		strftime(currentTime, sizeof(currentTime), "%d-%b-%y %X", ttm);		FILE *f = fopen(logFile, "at");		if (f)		{			fprintf(f, "[%s] %s\n", currentTime, logBuff);			fclose(f);		}		else		{			syslog(LOG_MAKEPRI(LOG_LOCAL1, LOG_CRIT), logBuff);		}	}	else if (logLevel <= cfig.logLevel)		syslog(LOG_MAKEPRI(LOG_LOCAL1, LOG_CRIT), logBuff);}void logMess(request *req, BYTE logLevel){	if (verbatim)	{		if (!req->serverError.errormessage[0])			printf(req->serverError.errormessage, strerror(errno));		if (req->path[0])			printf("Client %s:%u %s, %s\n", inet_ntoa(req->client.sin_addr), ntohs(req->client.sin_port), req->path, req->serverError.errormessage);		else			printf("Client %s:%u, %s\n", inet_ntoa(req->client.sin_addr), ntohs(req->client.sin_port), req->serverError.errormessage);	}	else if (logFile[0] && logLevel <= cfig.logLevel)	{		char currentTime[32];		time_t t = time(NULL);		tm *ttm = localtime(&t);		strftime(currentTime, sizeof(currentTime), "%d-%b-%y %X", ttm);		FILE *f = fopen(logFile, "at");		if (f)		{			if (req->path[0])				fprintf(f,"[%s] Client %s:%u %s, %s\n", currentTime, inet_ntoa(req->client.sin_addr), ntohs(req->client.sin_port), req->path, req->serverError.errormessage);			else				fprintf(f,"[%s] Client %s:%u, %s\n", currentTime, inet_ntoa(req->client.sin_addr), ntohs(req->client.sin_port), req->serverError.errormessage);			fclose(f);		}	}	else if (logLevel <= cfig.logLevel)	{		char logBuff[256];		if (!req->serverError.errormessage[0])			sprintf(req->serverError.errormessage, strerror(errno));		if (req->path[0])			sprintf(logBuff,"Client %s:%u %s, %s\n", inet_ntoa(req->client.sin_addr), ntohs(req->client.sin_port), req->path, req->serverError.errormessage);		else			sprintf(logBuff,"Client %s:%u, %s\n", inet_ntoa(req->client.sin_addr), ntohs(req->client.sin_port), req->serverError.errormessage);		syslog(LOG_MAKEPRI(LOG_LOCAL1, LOG_CRIT), logBuff);	}}