#include "log.h"

const char *msg_type[] = {
  "OFPT_FLOW_MOD_ADD",
  "OFPT_STATS_REQUEST_FLOW",
  "OFPT_STATS_REPLY_FLOW",
  "OFPT_STATS_REQUEST_FLOW",
  "OFPT_STATS_REPLY_PORT",
  "OFPT_HELLO",
  "OFPT_ECHO_REPLY",
  "OFPT_ECHO_REQUEST",
  "OFPT_ERROR",
  "GENERIC_MSG",
  "SNMP_MSG",
  "PCAP_MSG",
  "OFPT_PACKET_IN_MSG",
  "PKTGEN_MSG"
};

FILE* logger;

/*
 * Initializes the logging system of oflops.
 * @param filename The file where the logging messages are stored. 
 */
void
oflops_log_init(const char *filename) {
  logger = fopen(filename, "w");
  if(logger == NULL) {
    perror_and_exit("failed to open log file", 1);
  }
}

int 
oflops_log(struct timeval ts, int type, char *details) {
  fprintf(logger, "%lu.%06lu:%s:%s\n",(long unsigned int)ts.tv_sec,
	  (long unsigned int)ts.tv_usec, msg_type[type], details);
  fflush(logger);
  return 1;
}


/*
 * Initializes the logging system of oflops.
 * @param filename The file where the logging messages are stored. 
 */
void
oflops_log_close() {
  fclose(logger);
}