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/*
* Part of Very Secure FTPd
* Licence: GPL v2
* Author: Chris Evans
*
* logging.c
*/
#include "logging.h"
#include "tunables.h"
#include "utility.h"
#include "str.h"
#include "sysutil.h"
#include "sysstr.h"
#include "session.h"
/* File local functions */
static int vsf_log_type_is_transfer(enum EVSFLogEntryType type);
static void vsf_log_common(struct vsf_session* p_sess, int succeeded,
enum EVSFLogEntryType what,
const struct mystr* p_str);
static void vsf_log_do_log_vsftpd_format(struct vsf_session* p_sess,
struct mystr* p_str, int succeeded,
enum EVSFLogEntryType what,
const struct mystr* p_log_str);
static void vsf_log_do_log_wuftpd_format(struct vsf_session* p_sess,
struct mystr* p_str, int succeeded);
static void vsf_log_do_log_to_file(int fd, struct mystr* p_str);
void
vsf_log_init(struct vsf_session* p_sess)
{
int retval;
if (tunable_syslog_enable || tunable_tcp_wrappers)
{
vsf_sysutil_openlog(1);
}
if (!tunable_xferlog_enable && !tunable_dual_log_enable)
{
return;
}
if (tunable_dual_log_enable || tunable_xferlog_std_format)
{
retval = vsf_sysutil_create_or_open_file_append(tunable_xferlog_file, 0600);
if (vsf_sysutil_retval_is_error(retval))
{
die2("failed to open xferlog log file:", tunable_xferlog_file);
}
p_sess->xferlog_fd = retval;
}
if (tunable_dual_log_enable || !tunable_xferlog_std_format)
{
if (!tunable_syslog_enable)
{
retval = vsf_sysutil_create_or_open_file_append(tunable_vsftpd_log_file,
0600);
if (vsf_sysutil_retval_is_error(retval))
{
die2("failed to open vsftpd log file:", tunable_vsftpd_log_file);
}
p_sess->vsftpd_log_fd = retval;
}
}
}
static int
vsf_log_type_is_transfer(enum EVSFLogEntryType type)
{
return (type == kVSFLogEntryDownload || type == kVSFLogEntryUpload);
}
void
vsf_log_start_entry(struct vsf_session* p_sess, enum EVSFLogEntryType what)
{
if (p_sess->log_type != 0)
{
bug("non null log_type in vsf_log_start_entry");
}
p_sess->log_type = (unsigned long) what;
p_sess->log_start_sec = 0;
p_sess->log_start_usec = 0;
p_sess->transfer_size = 0;
str_empty(&p_sess->log_str);
if (vsf_log_type_is_transfer(what))
{
p_sess->log_start_sec = vsf_sysutil_get_time_sec();
p_sess->log_start_usec = vsf_sysutil_get_time_usec();
}
}
void
vsf_log_line(struct vsf_session* p_sess, enum EVSFLogEntryType what,
struct mystr* p_str)
{
vsf_log_common(p_sess, 1, what, p_str);
}
int
vsf_log_entry_pending(struct vsf_session* p_sess)
{
if (p_sess->log_type == 0)
{
return 0;
}
return 1;
}
void
vsf_log_clear_entry(struct vsf_session* p_sess)
{
p_sess->log_type = 0;
}
void
vsf_log_do_log(struct vsf_session* p_sess, int succeeded)
{
vsf_log_common(p_sess, succeeded, (enum EVSFLogEntryType) p_sess->log_type,
&p_sess->log_str);
p_sess->log_type = 0;
}
static void
vsf_log_common(struct vsf_session* p_sess, int succeeded,
enum EVSFLogEntryType what, const struct mystr* p_str)
{
static struct mystr s_log_str;
/* Handle xferlog line if appropriate */
if (p_sess->xferlog_fd != -1 && vsf_log_type_is_transfer(what))
{
vsf_log_do_log_wuftpd_format(p_sess, &s_log_str, succeeded);
vsf_log_do_log_to_file(p_sess->xferlog_fd, &s_log_str);
}
/* Handle vsftpd.log line if appropriate */
if (p_sess->vsftpd_log_fd != -1)
{
vsf_log_do_log_vsftpd_format(p_sess, &s_log_str, succeeded, what, p_str);
vsf_log_do_log_to_file(p_sess->vsftpd_log_fd, &s_log_str);
}
/* Handle syslog() line if appropriate */
if (tunable_syslog_enable)
{
int severe = 0;
vsf_log_do_log_vsftpd_format(p_sess, &s_log_str, succeeded, what, p_str);
if (what == kVSFLogEntryLogin && !succeeded)
{
severe = 1;
}
str_syslog(&s_log_str, severe);
}
}
static void
vsf_log_do_log_to_file(int fd, struct mystr* p_str)
{
if (!tunable_no_log_lock)
{
int retval = vsf_sysutil_lock_file_write(fd);
if (vsf_sysutil_retval_is_error(retval))
{
return;
}
}
str_replace_unprintable(p_str, '?');
str_append_char(p_str, '\n');
/* Ignore write failure; maybe the disk filled etc. */
(void) str_write_loop(p_str, fd);
if (!tunable_no_log_lock)
{
vsf_sysutil_unlock_file(fd);
}
}
static void
vsf_log_do_log_wuftpd_format(struct vsf_session* p_sess, struct mystr* p_str,
int succeeded)
{
static struct mystr s_filename_str;
long delta_sec;
enum EVSFLogEntryType what = (enum EVSFLogEntryType) p_sess->log_type;
/* Date - vsf_sysutil_get_current_date updates cached time */
str_alloc_text(p_str, vsf_sysutil_get_current_date());
str_append_char(p_str, ' ');
/* Transfer time (in seconds) */
delta_sec = vsf_sysutil_get_time_sec() - p_sess->log_start_sec;
if (delta_sec <= 0)
{
delta_sec = 1;
}
str_append_ulong(p_str, (unsigned long) delta_sec);
str_append_char(p_str, ' ');
/* Remote host name */
str_append_str(p_str, &p_sess->remote_ip_str);
str_append_char(p_str, ' ');
/* Bytes transferred */
str_append_filesize_t(p_str, p_sess->transfer_size);
str_append_char(p_str, ' ');
/* Filename */
str_copy(&s_filename_str, &p_sess->log_str);
str_replace_char(&s_filename_str, ' ', '_');
str_append_str(p_str, &s_filename_str);
str_append_char(p_str, ' ');
/* Transfer type (ascii/binary) */
if (p_sess->is_ascii)
{
str_append_text(p_str, "a ");
}
else
{
str_append_text(p_str, "b ");
}
/* Special action flag - tar, gzip etc. */
str_append_text(p_str, "_ ");
/* Direction of transfer */
if (what == kVSFLogEntryUpload)
{
str_append_text(p_str, "i ");
}
else
{
str_append_text(p_str, "o ");
}
/* Access mode: anonymous/real user, and identity */
if (p_sess->is_anonymous && !p_sess->is_guest)
{
str_append_text(p_str, "a ");
str_append_str(p_str, &p_sess->anon_pass_str);
}
else
{
if (p_sess->is_guest)
{
str_append_text(p_str, "g ");
}
else
{
str_append_text(p_str, "r ");
}
str_append_str(p_str, &p_sess->user_str);
}
str_append_char(p_str, ' ');
/* Service name, authentication method, authentication user id */
str_append_text(p_str, "ftp 0 * ");
/* Completion status */
if (succeeded)
{
str_append_char(p_str, 'c');
}
else
{
str_append_char(p_str, 'i');
}
}
static void
vsf_log_do_log_vsftpd_format(struct vsf_session* p_sess, struct mystr* p_str,
int succeeded, enum EVSFLogEntryType what,
const struct mystr* p_log_str)
{
str_empty(p_str);
if (!tunable_syslog_enable)
{
/* Date - vsf_sysutil_get_current_date updates cached time */
str_append_text(p_str, vsf_sysutil_get_current_date());
/* Pid */
str_append_text(p_str, " [pid ");
str_append_ulong(p_str, vsf_sysutil_getpid());
str_append_text(p_str, "] ");
}
/* User */
if (!str_isempty(&p_sess->user_str))
{
str_append_char(p_str, '[');
str_append_str(p_str, &p_sess->user_str);
str_append_text(p_str, "] ");
}
/* And the action */
if (what != kVSFLogEntryFTPInput && what != kVSFLogEntryFTPOutput &&
what != kVSFLogEntryConnection && what != kVSFLogEntryDebug)
{
if (succeeded)
{
str_append_text(p_str, "OK ");
}
else
{
str_append_text(p_str, "FAIL ");
}
}
switch (what)
{
case kVSFLogEntryDownload:
str_append_text(p_str, "DOWNLOAD");
break;
case kVSFLogEntryUpload:
str_append_text(p_str, "UPLOAD");
break;
case kVSFLogEntryMkdir:
str_append_text(p_str, "MKDIR");
break;
case kVSFLogEntryLogin:
str_append_text(p_str, "LOGIN");
break;
case kVSFLogEntryFTPInput:
str_append_text(p_str, "FTP command");
break;
case kVSFLogEntryFTPOutput:
str_append_text(p_str, "FTP response");
break;
case kVSFLogEntryConnection:
str_append_text(p_str, "CONNECT");
break;
case kVSFLogEntryDelete:
str_append_text(p_str, "DELETE");
break;
case kVSFLogEntryRename:
str_append_text(p_str, "RENAME");
break;
case kVSFLogEntryRmdir:
str_append_text(p_str, "RMDIR");
break;
case kVSFLogEntryChmod:
str_append_text(p_str, "CHMOD");
break;
case kVSFLogEntryDebug:
str_append_text(p_str, "DEBUG");
break;
default:
bug("bad entry_type in vsf_log_do_log");
break;
}
str_append_text(p_str, ": Client \"");
str_append_str(p_str, &p_sess->remote_ip_str);
str_append_char(p_str, '"');
if (what == kVSFLogEntryLogin && !str_isempty(&p_sess->anon_pass_str))
{
str_append_text(p_str, ", anon password \"");
str_append_str(p_str, &p_sess->anon_pass_str);
str_append_char(p_str, '"');
}
if (!str_isempty(p_log_str))
{
str_append_text(p_str, ", \"");
str_append_str(p_str, p_log_str);
str_append_char(p_str, '"');
}
if (what != kVSFLogEntryFTPInput && what != kVSFLogEntryFTPOutput &&
what != kVSFLogEntryDebug)
{
if (p_sess->transfer_size)
{
str_append_text(p_str, ", ");
str_append_filesize_t(p_str, p_sess->transfer_size);
str_append_text(p_str, " bytes");
}
if (vsf_log_type_is_transfer(what))
{
long delta_sec = vsf_sysutil_get_time_sec() - p_sess->log_start_sec;
long delta_usec = vsf_sysutil_get_time_usec() - p_sess->log_start_usec;
double time_delta = (double) delta_sec + ((double) delta_usec /
(double) 1000000);
double kbyte_rate;
if (time_delta <= 0)
{
time_delta = 0.1;
}
kbyte_rate =
((double) p_sess->transfer_size / time_delta) / (double) 1024;
str_append_text(p_str, ", ");
str_append_double(p_str, kbyte_rate);
str_append_text(p_str, "Kbyte/sec");
}
}
}
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