uhub/src/plugins/mod_logging.c

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/*
* uhub - A tiny ADC p2p connection hub
* Copyright (C) 2007-2012, Jan Vidar Krey
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "system.h"
#include "adc/adcconst.h"
#include "adc/sid.h"
#include "util/memory.h"
#include "network/ipcalc.h"
#include "plugin_api/handle.h"
#include "util/misc.h"
#include "util/config_token.h"
#ifndef WIN32
#include <syslog.h>
#endif
struct ip_addr_encap;
struct log_data
{
enum {
mode_file,
mode_syslog
} logmode;
char* logfile;
int fd;
};
static void reset(struct log_data* data)
{
/* set defaults */
data->logmode = mode_file;
data->logfile = NULL;
data->fd = -1;
}
static void set_error_message(struct plugin_handle* plugin, const char* msg)
{
plugin->error_msg = msg;
}
static int log_open_file(struct plugin_handle* plugin, struct log_data* data)
{
int flags = O_CREAT | O_APPEND | O_WRONLY;
data->fd = open(data->logfile, flags, 0664);
return (data->fd != -1);
}
#ifndef WIN32
static int log_open_syslog(struct plugin_handle* plugin)
{
openlog("uhub", 0, LOG_USER);
return 1;
}
#endif
static struct log_data* parse_config(const char* line, struct plugin_handle* plugin)
{
struct log_data* data = (struct log_data*) hub_malloc(sizeof(struct log_data));
struct cfg_tokens* tokens = cfg_tokenize(line);
char* token = cfg_token_get_first(tokens);
if (!data)
return 0;
reset(data);
while (token)
{
struct cfg_settings* setting = cfg_settings_split(token);
if (!setting)
{
set_error_message(plugin, "Unable to parse startup parameters");
cfg_tokens_free(tokens);
hub_free(data);
return 0;
}
if (strcmp(cfg_settings_get_key(setting), "file") == 0)
{
data->logfile = strdup(cfg_settings_get_value(setting));
data->logmode = mode_file;
}
#ifndef WIN32
else if (strcmp(cfg_settings_get_key(setting), "syslog") == 0)
{
int use_syslog = 0;
if (!string_to_boolean(cfg_settings_get_value(setting), &use_syslog))
{
data->logmode = (use_syslog) ? mode_syslog : mode_file;
}
}
#endif
else
{
set_error_message(plugin, "Unknown startup parameters given");
cfg_tokens_free(tokens);
cfg_settings_free(setting);
hub_free(data);
return 0;
}
cfg_settings_free(setting);
token = cfg_token_get_next(tokens);
}
cfg_tokens_free(tokens);
if (data->logmode == mode_file)
{
if ((data->logmode == mode_file && !data->logfile))
{
set_error_message(plugin, "No log file is given, use file=<path>");
hub_free(data);
return 0;
}
if (!log_open_file(plugin, data))
{
hub_free(data->logfile);
hub_free(data);
set_error_message(plugin, "Unable to open log file");
return 0;
}
}
#ifndef WIN32
else
{
if (!log_open_syslog(plugin))
{
hub_free(data->logfile);
hub_free(data);
set_error_message(plugin, "Unable to open syslog");
return 0;
}
}
#endif
return data;
}
static void log_close(struct log_data* data)
{
if (data->logmode == mode_file)
{
hub_free(data->logfile);
close(data->fd);
}
#ifndef WIN32
else
{
closelog();
}
#endif
hub_free(data);
}
static void log_message(struct log_data* data, const char *format, ...)
{
static char logmsg[1024];
struct tm *tmp;
time_t t;
va_list args;
ssize_t size = 0;
if (data->logmode == mode_file)
{
t = time(NULL);
tmp = localtime(&t);
strftime(logmsg, 32, "%Y-%m-%d %H:%M:%S ", tmp);
va_start(args, format);
size = vsnprintf(logmsg + 20, 1004, format, args);
va_end(args);
if (write(data->fd, logmsg, size + 20) < (size+20))
{
fprintf(stderr, "Unable to write full log. Error=%d: %s\n", errno, strerror(errno));
}
else
{
#ifdef WIN32
_commit(data->fd);
#else
#if defined _POSIX_SYNCHRONIZED_IO && _POSIX_SYNCHRONIZED_IO > 0
fdatasync(data->fd);
#else
fsync(data->fd);
#endif
#endif
}
}
#ifndef WIN32
else
{
va_start(args, format);
vsyslog(LOG_INFO, format, args);
va_end(args);
}
#endif
}
static void log_user_login(struct plugin_handle* plugin, struct plugin_user* user)
{
const char* cred = auth_cred_to_string(user->credentials);
const char* addr = ip_convert_to_string(&user->addr);
log_message(plugin->ptr, "LoginOK %s/%s %s \"%s\" (%s) \"%s\"\n", sid_to_string(user->sid), user->cid, addr, user->nick, cred, user->user_agent);
}
static void log_user_login_error(struct plugin_handle* plugin, struct plugin_user* user, const char* reason)
{
const char* addr = ip_convert_to_string(&user->addr);
log_message(plugin->ptr, "LoginError %s/%s %s \"%s\" (%s) \"%s\"\n", sid_to_string(user->sid), user->cid, addr, user->nick, reason, user->user_agent);
}
static void log_user_logout(struct plugin_handle* plugin, struct plugin_user* user, const char* reason)
{
const char* addr = ip_convert_to_string(&user->addr);
log_message(plugin->ptr, "Logout %s/%s %s \"%s\" (%s) \"%s\"\n", sid_to_string(user->sid), user->cid, addr, user->nick, reason, user->user_agent);
}
static void log_change_nick(struct plugin_handle* plugin, struct plugin_user* user, const char* new_nick)
{
const char* addr = ip_convert_to_string(&user->addr);
log_message(plugin->ptr, "NickChange %s/%s %s \"%s\" -> \"%s\"\n", sid_to_string(user->sid), user->cid, addr, user->nick, new_nick);
}
int plugin_register(struct plugin_handle* plugin, const char* config)
{
PLUGIN_INITIALIZE(plugin, "Logging plugin", "1.0", "Logs users entering and leaving the hub.");
plugin->funcs.on_user_login = log_user_login;
plugin->funcs.on_user_login_error = log_user_login_error;
plugin->funcs.on_user_logout = log_user_logout;
plugin->funcs.on_user_nick_change = log_change_nick;
plugin->ptr = parse_config(config, plugin);
if (!plugin->ptr)
return -1;
return 0;
}
int plugin_unregister(struct plugin_handle* plugin)
{
/* No need to do anything! */
log_close(plugin->ptr);
return 0;
}