#include <unistd.h>#include <setjmp.h>#include <signal.h>#include <string.h>#include <netdb.h>#include <netinet/in.h>#include <sys/types.h>#include <sys/socket.h>#include <time.h>#include "bandwidthd.h"#ifdef HAVE_ARPA_NAMESER_H#include <arpa/nameser.h>#endif#ifdef HAVE_RESOLV_H#include <resolv.h>#endifextern unsigned int SubnetCount;extern struct config config;jmp_buf dnsjump;static void rdnslngjmp(int signal);void rdns(char *Buffer, unsigned long IP)  // This takes over sigalarm!	{#ifdef HAVE_RESOLV_H	char DNSError[] = "DNS Timeout: Correct to speed up graphing";	char None[] = "Configure DNS to reverse this IP";	char TooManyDNSTimeouts[] = "Too many dns timeouts, reverse lookups suspended";	struct hostent *hostent;	char chrIP[50];	static int Init = TRUE;	static int DNSTimeouts = 0;  // This is reset for each run because we're forked	unsigned long addr = htonl(IP);    _res.retrans = 1;    _res.retry = 2;	if (Init)		{        signal(SIGALRM, rdnslngjmp);		Init = FALSE;		}	if (DNSTimeouts > 100)		{		syslog(LOG_ERR, "Too many dns timeouts, reverse lookups suspended");        strncpy(Buffer, TooManyDNSTimeouts, 253);		Buffer[254] = '\0';		return;		}			if (setjmp(dnsjump) == 0)		{		alarm(10);  // Don't let gethostbyaddr hold us up too long		hostent = gethostbyaddr((char *) &addr, 4, AF_INET); // (char *)&Data->IP						alarm(0);				if (hostent)			sprintf(Buffer, "%s", hostent->h_name);		else			{	        strncpy(Buffer, None, 253);			Buffer[254] = '\0';			}		}	else  // Our alarm timed out		{		HostIp2CharIp(IP, chrIP);		syslog(LOG_ERR, "DNS timeout for %s: This problem reduces graphing performance", chrIP);		DNSTimeouts++;        strncpy(Buffer, DNSError, 253);		Buffer[254] = '\0';		}#else	Buffer[0] = '\0';#endif	}static void rdnslngjmp(int signal)	{    longjmp(dnsjump, 1);	}void swap(struct SummaryData **a, struct SummaryData **b) {	struct SummaryData *temp;    temp = *a; *a = *b; *b = temp;}void QuickSortSummaryData(struct SummaryData *SummaryData[], int left, int right) {    int i,j,center;    unsigned long long pivot;    if (left==right) return;    if (left+1==right) {        if (SummaryData[left]->Total < SummaryData[right]->Total)            swap(&SummaryData[left],&SummaryData[right]);        return;    }    /* use the median-of-three method for picking pivot */    center = (left+right)/2;    if (SummaryData[left]->Total < SummaryData[center]->Total)        swap(&SummaryData[left],&SummaryData[center]);    if (SummaryData[left]->Total < SummaryData[right]->Total)        swap(&SummaryData[left],&SummaryData[right]);    if (SummaryData[center]->Total < SummaryData[right]->Total)        swap(&SummaryData[center],&SummaryData[right]);    pivot = SummaryData[center]->Total;    swap(&SummaryData[center],&SummaryData[right-1]); /* hide the pivot */    i = left; j = right - 1;    do {        do { ++i; } while (SummaryData[i]->Total > pivot);        do { --j; } while (SummaryData[j]->Total < pivot);        swap(&SummaryData[i],&SummaryData[j]);    } while (j > i);    swap(&SummaryData[i],&SummaryData[j]); /* undo last swap */    swap(&SummaryData[i],&SummaryData[right-1]); /* restore pivot */    QuickSortSummaryData(SummaryData,left,i-1);    QuickSortSummaryData(SummaryData,i+1,right);}#define NumFactor 1024static void FormatNum(unsigned long long n, char *buf, int len) {    double f;    if (n<NumFactor) { snprintf(buf,len,"<td align=\"right\"><tt>%i&nbsp;</tt></td>",(int)n); return; }    f = n;    f /= NumFactor; if (f<NumFactor) { snprintf(buf,len,"<td align=\"right\"><tt>%.1fK</tt></td>",f); return; }    f /= NumFactor; if (f<NumFactor) { snprintf(buf,len,"<td align=\"right\"><tt>%.1fM</tt></td>",f); return; }    f /= NumFactor; if (f<NumFactor) { snprintf(buf,len,"<td align=\"right\"><tt>%.1fG</tt></td>",f); return; }    f /= NumFactor; snprintf(buf,len,"<td align=\"right\"><tt>%.1fT</tt></td>\n",f);}void PrintTableLine(FILE *stream, struct SummaryData *Data, int Counter)	{	char Buffer1[50];	char Buffer2[50];	char Buffer3[50];	char Buffer4[50];	char Buffer4b[50];	char Buffer5[50];	char Buffer5b[50];	char Buffer6[50];	char Buffer7[50];	char Buffer8[50];	// First convert the info to nice, human readable stuff	if (Data->IP == 0)		strcpy(Buffer1, "Total");	else		HostIp2CharIp(Data->IP, Buffer1);    FormatNum(Data->Total,         Buffer2,  50);	FormatNum(Data->TotalSent,     Buffer3,  50);	FormatNum(Data->TotalReceived, Buffer4,  50);	FormatNum(Data->FTP, 		   Buffer4b, 50);	FormatNum(Data->HTTP,          Buffer5,  50);	FormatNum(Data->P2P,           Buffer5b, 50);	FormatNum(Data->TCP,           Buffer6,  50);	FormatNum(Data->UDP,           Buffer7,  50);	FormatNum(Data->ICMP,          Buffer8,  50);	if (Counter%4 == 0 || (Counter-1)%4 == 0)		fprintf(stream, "<TR>");	else		fprintf(stream, "<TR bgcolor=lightblue>");	if (Data->Graph)		fprintf(stream, "<TD><a href=\"#%s-%c\">%s</a></TD>%s%s%s%s%s%s%s%s%s</TR>\n",			Buffer1, // Ip			config.tag,			Buffer1, // Ip			Buffer2, // Total			Buffer3, // TotalSent			Buffer4, // TotalReceived			Buffer4b, // FTP			Buffer5, // HTTP			Buffer5b, // P2P			Buffer6, // TCP			Buffer7, // UDP			Buffer8); // ICMP	else		fprintf(stream, "<TD>%s</TD>%s%s%s%s%s%s%s%s%s</TR>\n",			Buffer1, // Ip			Buffer2, // Total			Buffer3, // TotalSent			Buffer4, // TotalReceived			Buffer4b, // FTP			Buffer5, // HTTP			Buffer5b, // P2P					Buffer6, // TCP			Buffer7, // UDP			Buffer8); // ICMP	}void MakeIndexPages(int NumIps, struct SummaryData *SummaryData[])	{	int SubnetCounter;	int Counter, tCounter;	time_t WriteTime;	char filename[] = "./htdocs/index2.html";	char *PeriodDesc;		FILE *file;	char Buffer1[50];	char Buffer2[50];	char HostName[255];	WriteTime = time(NULL);		QuickSortSummaryData(SummaryData, 0, NumIps-1);	////////////////////////////////////////////////	// Print main index page		if (config.tag == '1')		{		if ((file = fopen("./htdocs/index.html", "wt")) == NULL)			{			syslog(LOG_ERR, "Failed to open ./htdocs/index.html");			exit(1);			}		}	else		{		filename[14] = config.tag;		if ((file = fopen(filename, "wt")) == NULL)			{			syslog(LOG_ERR, "Failed to open %s", filename);			exit(1);			}		}	switch (config.tag)		{		case '1': PeriodDesc = "Daily"; break;		case '2': PeriodDesc = "Weekly"; break;		case '3': PeriodDesc = "Monthly"; break;		case '4': PeriodDesc = "Yearly"; break;		default: PeriodDesc = ""; break;		}		fprintf(file, "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">\n");	fprintf(file, "<HTML>\n<HEAD>\n<TITLE>Bandwidthd</TITLE>\n");	if (config.meta_refresh)		fprintf(file, "<META HTTP-EQUIV=\"REFRESH\" content=\"%u\">\n",				config.meta_refresh);	fprintf(file, "<META HTTP-EQUIV=\"EXPIRES\" content=\"-1\">\n");	fprintf(file, "<META HTTP-EQUIV=\"PRAGMA\" content=\"no-cache\">\n");	fprintf(file, "</HEAD>\n<BODY vlink=blue>\n%s<br>\n<center><img src=\"logo.gif\" ALT=\"Logo\"><BR>\n", ctime(&WriteTime));	fprintf(file, "Programmed by David Hinkle, Commissioned by <a href=\"http://www.derbytech.com\">DerbyTech</a> wireless networking.<BR>");	fprintf(file, "<BR>\n - <a href=\"index.html\">Daily</a> -- <a href=\"index2.html\">Weekly</a> -- ");	fprintf(file, "<a href=\"index3.html\">Monthly</a> -- <a href=\"index4.html\">Yearly</a> - <BR>\n");	fprintf(file, "<BR>\nPick a Subnet:<BR>\n");		if (config.tag == '1')		fprintf(file, "- <a href=\"index.html\">Top20</a> -");	else		fprintf(file, "- <a href=\"index%c.html\">Top20</a> -", config.tag);	for (Counter = 0; Counter < SubnetCount; Counter++)            		{		HostIp2CharIp(SubnetTable[Counter].ip, Buffer1);		fprintf(file, "- <a href=\"Subnet-%c-%s.html\">%s</a> -", config.tag, Buffer1, Buffer1);		}	/////  TOP 20	fprintf(file, "<H1>Top 20 IPs by Traffic - %s</H1></center>", PeriodDesc);	fprintf(file, "<center>\n<table width=\"100%%\" border=1 cellspacing=0>\n");    // PASS 1:  Write out the table	fprintf(file, "<TR bgcolor=lightblue><TD>Ip and Name<TD align=center>Total<TD align=center>Total Sent<TD align=center>Total Received<TD align=center>FTP<TD align=center>HTTP<TD align=center>P2P<TD align=center>TCP<TD align=center>UDP<TD align=center>ICMP\n");	for (Counter=0; Counter < 21 && Counter < NumIps; Counter++)		PrintTableLine(file, SummaryData[Counter], Counter);	fprintf(file, "</table></center>\n");	// PASS 2: The graphs	for (Counter=0; Counter < 21 && Counter < NumIps; Counter++)		if (SummaryData[Counter]->Graph)			{			if (SummaryData[Counter]->IP == 0)				{				strcpy(Buffer1, "Total");					strcpy(HostName, "Total of all subnets");				}			else				{					HostIp2CharIp(SummaryData[Counter]->IP, Buffer1);				rdns(HostName, SummaryData[Counter]->IP);				}			fprintf(file, "<a name=\"%s-%c\"></a><H1><a href=\"#top\">(Top)</a> %s - %s</H1><BR>\nSend:<br>\n<img src=%s-%c-S.png ALT=\"Sent traffic for %s\"><BR>\n<img src=legend.gif ALT=\"Legend\"><br>\nReceived:<br>\n<img src=%s-%c-R.png ALT=\"Sent traffic for %s\"><BR>\n<img src=legend.gif ALT=\"Legend\"><br>\n<BR>\n", Buffer1, config.tag, Buffer1, HostName, Buffer1, config.tag, Buffer1, Buffer1, config.tag, Buffer1);			}	fprintf(file, "</BODY></HTML>\n");	fclose(file);	////////////////////////////////////////////////	// Print each subnet page	for (SubnetCounter = 0; SubnetCounter < SubnetCount; SubnetCounter++)		{		HostIp2CharIp(SubnetTable[SubnetCounter].ip, Buffer1);