128 lines
3.5 KiB
C
128 lines
3.5 KiB
C
/* Pi-hole: A black hole for Internet advertisements
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* (c) 2017 Pi-hole, LLC (https://pi-hole.net)
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* Network-wide ad blocking via your own hardware.
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*
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* FTL Engine
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* Logging routines
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*
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* This file is copyright under the latest version of the EUPL.
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* Please see LICENSE file for your rights under this license. */
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#include "FTL.h"
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void close_FTL_log(void)
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{
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if(logfile != NULL)
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fclose(logfile);
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}
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void open_FTL_log(bool test)
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{
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// Open a log file in append/create mode
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logfile = fopen(FTLfiles.log, "a+");
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if((logfile == NULL) && test){
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syslog(LOG_ERR, "Opening of FTL\'s log file failed!");
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printf("FATAL: Opening of FTL log (%s) failed!\n",FTLfiles.log);
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printf(" Make sure it exists and is writeable by user %s\n", username);
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// Return failure
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exit(EXIT_FAILURE);
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}
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if(test)
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close_FTL_log();
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}
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void get_timestr(char *timestring)
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{
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time_t t = time(NULL);
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struct tm tm = *localtime(&t);
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struct timeval tv;
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gettimeofday(&tv, NULL);
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int millisec = tv.tv_usec/1000;
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sprintf(timestring,"%d-%02d-%02d %02d:%02d:%02d.%03i", tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec, millisec);
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}
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void logg(const char *format, ...)
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{
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char timestring[32] = "";
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va_list args;
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get_timestr(timestring);
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// Print to stdout before writing to file
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if(debug)
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{
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printf("[%s] ", timestring);
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va_start(args, format);
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vprintf(format, args);
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va_end(args);
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printf("\n");
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}
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// Open log file
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open_FTL_log(false);
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// Write to log file
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if(logfile != NULL)
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{
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fprintf(logfile, "[%s] ", timestring);
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va_start(args, format);
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vfprintf(logfile, format, args);
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va_end(args);
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fputc('\n',logfile);
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}
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else if(debug)
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{
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printf("!!! WARNING: Writing to FTL\'s log file failed!\n");
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syslog(LOG_ERR, "Writing to FTL\'s log file failed!");
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}
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// Close log file
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close_FTL_log();
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}
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void format_memory_size(char *prefix, unsigned long int bytes, double *formated)
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{
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int i;
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*formated = bytes;
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// Determine exponent for human-readable display
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for(i=0; i < 7; i++)
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{
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if(*formated <= 1e3)
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break;
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*formated /= 1e3;
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}
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const char* prefixes[8] = { "", "K", "M", "G", "T", "P", "E", "?" };
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// Chose matching SI prefix
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strcpy(prefix, prefixes[i]);
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}
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void logg_struct_resize(const char* str, int to, int step)
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{
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unsigned long int structbytes = sizeof(countersStruct) + sizeof(ConfigStruct) + counters.queries_MAX*sizeof(queriesDataStruct) + counters.forwarded_MAX*sizeof(forwardedDataStruct) + counters.clients_MAX*sizeof(clientsDataStruct) + counters.domains_MAX*sizeof(domainsDataStruct) + counters.overTime_MAX*sizeof(overTimeDataStruct) + (counters.wildcarddomains)*sizeof(*wildcarddomains);
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unsigned long int dynamicbytes = memory.wildcarddomains + memory.domainnames + memory.clientips + memory.clientnames + memory.forwardedips + memory.forwardednames + memory.forwarddata + memory.querytypedata;
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unsigned long int bytes = structbytes + dynamicbytes;
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char *prefix = calloc(2, sizeof(char));
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double formated = 0.0;
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format_memory_size(prefix, bytes, &formated);
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logg("Notice: Increasing %s struct size from %i to %i (%.2f %sB)", str, (to-step), to, formated, prefix);
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if(debug)
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{
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logg(" at query time: %s", timestamp);
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}
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free(prefix);
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}
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void log_counter_info(void)
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{
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logg(" -> Total DNS queries: %i", counters.queries);
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logg(" -> Cached DNS queries: %i", counters.cached);
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logg(" -> Blocked DNS queries: %i", counters.blocked);
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logg(" -> Unknown DNS queries: %i", counters.unknown);
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logg(" -> Unique domains: %i", counters.domains);
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logg(" -> Unique clients: %i", counters.clients);
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}
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