Logger.cpp

00001 /*
00002  * syslog device library
00003  * Copyright (c) 2011 Hiroshi Suga
00004  * Copyright (c) 2016 Colin Hogben
00005  * Released under the MIT License: http://mbed.org/license/mit
00006  */
00007 
00008 /** @file Logger.cpp
00009  * @brief syslog device (sender/client)
00010  */
00011 
00012 #include "Logger.h"
00013 #include <cstdio>
00014 
00015 #ifdef MBED_CONF_LOGGER_LINE_MAX
00016 #define LOG_LEN MBED_CONF_LOGGER_LINE_MAX
00017 #else
00018 #define LOG_LEN 256
00019 #endif
00020 
00021 #define LOG_UDPPORT 514
00022 
00023 static const char mstr[12][4] = {
00024     "Jan", "Feb", "Mar", "Apr", "May", "Jun",
00025     "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
00026 };
00027 
00028 Logger::Logger(NetworkInterface *netif, const char *host) {
00029     _Logger(netif, host, netif->get_ip_address());
00030 }
00031 
00032 Logger::Logger(NetworkInterface *netif, const char *host, const char *myname) {
00033     _Logger(netif, host, myname);
00034 }
00035 
00036 void Logger::_Logger(NetworkInterface *netif, const char *host, const char *myname) {
00037     _remote = SocketAddress(host, LOG_UDPPORT);
00038     snprintf(_ident, sizeof(_ident), "%s", myname);
00039     int err = _udpsock.open(netif);
00040     if (err) error("Cannot open syslog UDP socket");
00041     _udpsock.bind(LOG_UDPPORT);
00042 }
00043 
00044 void Logger::send(const char *tag, const char *content) {
00045     send(LOG_NOTICE, LOG_USER, tag, content);
00046 }
00047 
00048 void Logger::send(LOG_SEVERITY sev, LOG_FACILITY fac, const char *tag, const char *content) {
00049     char logmsg[LOG_LEN];
00050 
00051     time_t ctTime = time(NULL);  
00052     struct tm *t = localtime(&ctTime);
00053     int pri = (fac * 8) | sev;
00054 
00055     snprintf(logmsg, sizeof(logmsg),
00056              "<%d>%s %2d %02d:%02d:%02d %s %s %s",
00057              pri,
00058              mstr[t->tm_mon], t->tm_mday,
00059              t->tm_hour, t->tm_min, t->tm_sec,
00060              _ident,
00061              tag,
00062              content);
00063     _udpsock.sendto(_remote, logmsg, strlen(logmsg));
00064 }