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/*
* active port forwarder - software for secure forwarding
* Copyright (C) 2003-2007 jeremian <jeremian [at] poczta.fm>
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#include <config.h>
#include "logging.h"
#include "network.h"
#include <stdio.h>
#include <time.h>
#include <string.h>
#include <stdarg.h>
static llnodeT* head = NULL;
static char verlev;
static char format[51] = "%Y-%m-%d %H:%M:%S";
/*
* Function name: setdateformat
* Description: Sets the new date format based on the given string.
* Arguments: dateformat - the new date format
*/
void
setdateformat(char* dateformat)
{
if (dateformat) {
strncpy(format, dateformat, 50);
}
}
/*
* Function name: getdateformat
* Description: Returns the date format.
* Returns: The date format.
*/
char*
getdateformat()
{
return format;
}
/*
* Function name: localdate
* Description: Returns the formatted date string.
* Arguments: sec - the date in seconds
* Returns: The formatted date.
*/
char*
localdate(time_t* sec)
{
struct tm* tm;
static char localdat[31];
tm = localtime(sec);
memset(localdat, 0, 31);
strftime(localdat, 30, format, tm);
return localdat;
}
/*
* Function name: datum
* Description: Returns the formatted date string.
* Returns: The formatted date.
*/
char*
datum(void)
{
time_t sec;
struct tm* tm;
static char timedat[31];
time(&sec);
tm = localtime(&sec);
memset(timedat, 0, 31);
strftime(timedat, 30, format, tm);
return timedat;
}
/*
* Function name: getloglisthead
* Description: Returns the head of the log targets list.
* Returns: The head of the log targets list.
*/
llnodeT*
getloglisthead()
{
return head;
}
/*
* Function name: checkmsgti
* Description: Adds the given msgtype/importance to the log target.
* Arguments: target - the log target
* tab - the name of the msttype/importance
* Returns: 0 - success,
* 1 - failure.
*/
int
checkmsgti(llnodeT* target, char* tab)
{
if (strcmp(tab, "LOG_T_ALL") == 0) {
target->msgtype |= LOG_T_ALL;
}
else if (strcmp(tab, "LOG_T_USER") == 0) {
target->msgtype |= LOG_T_USER;
}
else if (strcmp(tab, "LOG_T_CLIENT") == 0) {
target->msgtype |= LOG_T_CLIENT;
}
else if (strcmp(tab, "LOG_T_INIT") == 0) {
target->msgtype |= LOG_T_INIT;
}
else if (strcmp(tab, "LOG_T_MANAGE") == 0) {
target->msgtype |= LOG_T_MANAGE;
}
else if (strcmp(tab, "LOG_T_MAIN") == 0) {
target->msgtype |= LOG_T_MAIN;
}
else if (strcmp(tab, "LOG_I_ALL") == 0) {
target->importance |= LOG_I_ALL;
}
else if (strcmp(tab, "LOG_I_CRIT") == 0) {
target->importance |= LOG_I_CRIT;
}
else if (strcmp(tab, "LOG_I_DEBUG") == 0) {
target->importance |= LOG_I_DEBUG;
}
else if (strcmp(tab, "LOG_I_INFO") == 0) {
target->importance |= LOG_I_INFO;
}
else if (strcmp(tab, "LOG_I_NOTICE") == 0) {
target->importance |= LOG_I_NOTICE;
}
else if (strcmp(tab, "LOG_I_WARNING") == 0) {
target->importance |= LOG_I_WARNING;
}
else if (strcmp(tab, "LOG_I_ERR") == 0) {
target->importance |= LOG_I_ERR;
}
else {
return 1; /* unknown msgtype/importance */
}
return 0;
}
/*
* Function name: checklogtarget
* Description: Parses the command line and sets all the options.
* Arguments: target - the log target
* Returns 0 - success,
* !0 - failure.
*/
int
checklogtarget(llnodeT* target)
{
char* ptr;
char desc[100];
char type = 0;
char tab[100];
int tmpfd;
int state, i;
if ((target == NULL) || (target->cmdline == NULL)) {
return 1; /* some of the important data is NULL */
}
state = 0; /* we are at the beginning of the cmdline */
memset(tab, 0, 100);
i = 0;
ptr = target->cmdline;
while ((*ptr) != 0) {
switch (state) {
/* beginning of the cmdline */
case 0: {
if ((*ptr) == ',') {
tab[i] = 0;
if (strcmp(tab, "file") == 0) {
type = LOG_L_FILE;
}
else if (strcmp(tab, "sock") == 0) {
type = LOG_L_SOCK;
}
else {
return 2; /* unknown type of the target */
}
state = 1; /* we are at the beginning of the file/sock description */
memset(tab, 0, 100);
memset(desc, 0, 100);
i = 0;
break;
}
if (i == 98) {
return 2; /* unknown type of the target (name too long) */
}
tab[i] = (*ptr);
++i;
break;
}
/* beginning of the file/sock description */
case 1: {
if ((*ptr) == ',') {
tab[i] = 0;
switch (type) {
case LOG_L_FILE: {
target->logfd = fopen(tab, "a");
if (target->logfd == NULL) {
return 4; /* logging to a non-opened file? */
}
state = 3; /* we want to read msgtype and importance */
break;
}
case LOG_L_SOCK: {
strncpy(desc, tab, 99);
state = 2; /* we want to open a socket (read port first) */
break;
}
default: {
return 2; /* unknown type of the target */
}
}
memset(tab, 0, 100);
i = 0;
break;
}
if (i == 98) {
return 3; /* wrong file/sock description (name too long) */
}
tab[i] = (*ptr);
++i;
break;
}
/* beginning of the sock port description */
case 2: {
if ((*ptr) == ',') {
tab[i] = 0;
if (ip_connect(&tmpfd, desc, tab, 1, NULL, NULL)) {
return 5; /* can't connect to host:port */
}
target->logfd = fdopen(tmpfd, "a");
if (target->logfd == NULL) {
return 4; /* can't create FILE* to log to */
}
state = 3; /* we want to read msgtype and importance */
memset(tab, 0, 100);
i = 0;
break;
}
if (i == 98) {
return 3; /* wrong file/sock description (name too long) */
}
tab[i] = (*ptr);
++i;
break;
}
/* beginning of the msgtype and importance section */
case 3: {
if ((*ptr) == ',') {
tab[i] = 0;
if (checkmsgti(target, tab)) {
return 6;
}
memset(tab, 0, 100);
i = 0;
break;
}
if (i == 98) {
return 6; /* wrong msgtype/importance description (name too long) */
}
tab[i] = (*ptr);
++i;
break;
}
}
++ptr;
}
if (i != 0) {
if (state == 3) {
tab[i] = 0;
if (checkmsgti(target, tab)) {
return 6;
}
}
else {
return 1;
}
}
return 0;
}
/*
* Function name: addlogtarget
* Description: Adds the new non-initialized log target with the specified command line.
* Arguments: cmdline - the command line
*/
void
addlogtarget(char* cmdline)
{
llnodeT* newnode = calloc(1, sizeof(llnodeT));
newnode->cmdline = cmdline;
newnode->next = head;
head = newnode;
}
/*
* Function name: loginit
* Description: Initializes the logging system.
* Arguments: verl - level of verbosity
* dateformat - date format
* Returns: 0 - success,
* !0 - failure.
*/
int
loginit(char verl, char* dateformat)
{
llnodeT* ptr;
int n;
verlev = 0;
if (verl) {
switch (verl) {
case 1: {
verlev = LOG_I_NOTICE | LOG_I_CRIT;
break;
}
case 2: {
verlev = LOG_I_INFO | LOG_I_NOTICE | LOG_I_CRIT;
break;
}
case 3: {
verlev = LOG_I_INFO | LOG_I_NOTICE | LOG_I_WARNING | LOG_I_CRIT;
break;
}
case 4: {
verlev = LOG_I_INFO | LOG_I_NOTICE | LOG_I_WARNING | LOG_I_ERR | LOG_I_CRIT;
break;
}
case 5: {
verlev = LOG_I_INFO | LOG_I_NOTICE | LOG_I_WARNING | LOG_I_ERR | LOG_I_CRIT | LOG_I_DEBUG;
break;
}
default: {
verlev = LOG_I_ALL;
break;
}
}
}
setdateformat(dateformat);
ptr = head;
while (ptr) {
if ((n = checklogtarget(ptr)) != 0) {
return n;
}
ptr = ptr->next;
}
return 0;
}
/*
* Function name: initializelogging
* Description: The opaque function for loginit. If the logging initialization
* failed, it prints the appropriate message and exits.
* Arguments: verl - level of verbosity
* dateformat - date format
*/
void
initializelogging(char verl, char* dateformat)
{
int k;
if ((k = loginit(verl, dateformat)) != 0) {
switch (k) {
/* wrong format of the logcmd */
case 1: {
printf("Wrong format of the logcmd\n");
break;
}
/* unknown type of the logging target */
case 2: {
printf("Unknown type of the logging target\n");
break;
}
/* wrong description of the logging target (name too long) */
case 3: {
printf("Wrong description of the logging target (name too long)\n");
break;
}
/* can't open file to log to */
case 4: {
printf("Can't open file to log to\n");
break;
}
/* can't connect to target host */
case 5: {
printf("Can't connect to target host\n");
break;
}
/* wrong msgtype/importance description */
case 6: {
printf("Wrong msgtype/importance description\n");
break;
}
}
exit(1);
}
}
/*
* Function name: aflog
* Description: Logs the given message.
* Arguments: type - the type of the message
* importance - the importance of the message
* form - the format of the message
* ... - the additional arguments
*/
void
aflog(char type, char importance, const char* form, ...)
{
llnodeT* ptr;
va_list ap;
if (verlev & importance) {
if (format[0] != 0) {
printf("[%s] ", datum());
}
va_start(ap, form);
vfprintf(stdout, form, ap);
va_end(ap);
printf("\n");
}
ptr = head;
while (ptr) {
if ((type & ptr->msgtype) && (importance & ptr->importance)) {
if (format[0] != 0) {
fprintf(ptr->logfd, "[%s] ", datum());
}
va_start(ap, form);
vfprintf(ptr->logfd, form, ap);
va_end(ap);
fprintf(ptr->logfd, "\n");
fflush(ptr->logfd);
}
ptr = ptr->next;
}
}
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