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/*
* Alternative logging formats for Pure-FTPd
*/
#include <config.h>
#ifdef WITH_ALTLOG
# include "ftpd.h"
# include "ftpwho-update.h"
# include "globals.h"
# include "altlog.h"
# include "safe_rw.h"
# ifdef WITH_DMALLOC
# include <dmalloc.h>
# endif
static int altlog_write(const char *str)
{
struct flock lock;
ssize_t left;
if (altlog_fd == -1 || str == NULL ||
(left = (ssize_t) strlen(str)) <= (ssize_t) 0) {
return -1;
}
lock.l_whence = SEEK_SET;
lock.l_start = (off_t) 0;
lock.l_len = (off_t) 0;
lock.l_pid = getpid();
lock.l_type = F_WRLCK;
while (fcntl(altlog_fd, F_SETLKW, &lock) < 0 && errno == EINTR);
if (lseek(altlog_fd, (off_t) 0, SEEK_END) < (off_t) 0
# ifdef ESPIPE
&& errno != ESPIPE
# endif
# ifdef EBADF
&& errno != EBADF
# endif
) {
return -1;
}
(void) safe_write(altlog_fd, str, (size_t) left, -1);
lock.l_type = F_UNLCK;
while (fcntl(altlog_fd, F_SETLK, &lock) < 0 && errno == EINTR);
return 0;
}
/* Verbose but compact log format for ftpStats */
static int altlog_writexfer_stats(const int upload,
const char * const filename,
const off_t size,
const double duration)
{
/*
* <date> <start.pid> <user> <ip> <u/d> <size> <duration> <file>
*/
const char *host_ = *host != 0 ? host : "-";
const char *account_ = *account != 0 ? account : "-";
char *alloca_line;
size_t line_size;
line_size = 16U /* now */ + 1U + 16U /* start */ + 1U /* . */ +
16U /* pid */ + 1U + strlen(account_) + 1U + strlen(host_) + 1U +
1U /* U/D */ + 1U + 20U /* size */ + 1U + 16U /* duration */ +
strlen(filename) + 1U /* \n */ + 1U;
if ((alloca_line = ALLOCA(line_size)) == NULL) {
return -1;
}
if (!SNCHECK(snprintf(alloca_line, line_size,
"%llu %llx.%lx %s %s %c %llu %lu %s\n",
(unsigned long long) time(NULL),
(unsigned long long) session_start_time,
(unsigned long) getpid(),
account_, host_,
upload != 0 ? 'U' : 'D',
(unsigned long long) size,
(unsigned long) (duration + 0.5),
filename), line_size)) {
altlog_write(alloca_line);
}
ALLOCA_FREE(alloca_line);
return 0;
}
# define NO_URLENCODE(c) ( \
((c) >= 'a' && (c) <= 'z') || \
((c) >= 'A' && (c) <= 'Z') || \
((c) >= '0' && (c) <= '9') || \
(c) == '.' || (c) == '/' || \
(c) == '_' || (c) == '-' \
)
# define HEXD(c) ((c) < 10 ? '0' + (c) : 'A' - 10 + (c))
static char *urlencode(const char *filename)
{
const char *ptr = filename;
char *quoted_filename;
char *quoted_filename_ptr;
size_t quoted_filename_size = (size_t) 1U;
int need_quote = 0;
char c;
while (*ptr != 0) {
if (NO_URLENCODE(*ptr)) {
quoted_filename_size++;
} else {
quoted_filename_size += (size_t) 3U;
need_quote = 1;
}
ptr++;
}
if (need_quote == 0) {
return (char *) filename;
}
if ((quoted_filename = malloc(quoted_filename_size)) == NULL) {
return NULL;
}
quoted_filename_ptr = quoted_filename;
ptr = filename;
c = *ptr;
do {
if (NO_URLENCODE(c)) {
if (quoted_filename_size <= (size_t) 1U) {
free(quoted_filename);
return NULL;
}
quoted_filename_size--;
*quoted_filename_ptr++ = c;
} else {
if (quoted_filename_size <= (size_t) 3U) {
free(quoted_filename);
return NULL;
}
quoted_filename_size -= (size_t) 3U;
*quoted_filename_ptr++ = '%';
*quoted_filename_ptr++ = HEXD(((unsigned char) c) >> 4);
*quoted_filename_ptr++ = HEXD(((unsigned char) c) & 0xf);
}
ptr++;
} while ((c = *ptr) != 0);
*quoted_filename_ptr = 0;
return quoted_filename;
}
/* HTTPd-like common log format */
static int altlog_writexfer_clf(const int upload,
const char * const filename,
const off_t size)
{
char date[sizeof "13/Apr/1975:12:34:56 +0100"];
struct tm *tm;
char *alloca_line;
const char *host_ = *host != 0 ? host : "-";
const char *account_ = *account != 0 ? account : "-";
char *quoted_filename;
time_t now;
long diff;
int sign;
size_t line_size;
if ((now = time(NULL)) == (time_t) -1 ||
(tm = localtime(&now)) == NULL ||
tm->tm_mon > 11 || tm->tm_mon < 0) {
return -1;
}
# ifdef HAVE_STRUCT_TM_TM_GMTOFF
diff = -(tm->tm_gmtoff) / 60L;
# elif defined(HAVE_SCALAR_TIMEZONE)
diff = -(timezone) / 60L;
# else
{
struct tm gmt;
struct tm *t;
int days, hours, minutes;
gmt = *gmtime(&now);
t = localtime(&now);
days = t->tm_yday - gmt.tm_yday;
hours = ((days < -1 ? 24 : 1 < days ? -24 : days * 24)
+ t->tm_hour - gmt.tm_hour);
minutes = hours * 60 + t->tm_min - gmt.tm_min;
diff = -minutes;
}
# endif
if (diff > 0L) {
sign = '+';
} else {
sign = '-';
diff = -diff;
}
if (SNCHECK(snprintf(date, sizeof date,
"%02d/%s/%d:%02d:%02d:%02d %c%02ld%02ld",
tm->tm_mday, months[tm->tm_mon], tm->tm_year + 1900,
tm->tm_hour, tm->tm_min, tm->tm_sec,
sign, diff / 60L, diff % 60L), sizeof date)) {
return -1;
}
if ((quoted_filename = urlencode(filename)) == NULL) {
return -1;
}
line_size = strlen(host_) + (sizeof " - " - 1U) + strlen(account_) +
(sizeof " [" - 1U) + (sizeof date - 1U) + (sizeof "] \"" - 1U) +
3U /* GET / PUT */ + (sizeof " " - 1U) + strlen(quoted_filename) +
(sizeof "\" 200 18446744073709551616\n" - 1U) + 1U;
if ((alloca_line = ALLOCA(line_size)) == NULL) {
return -1;
}
if (!SNCHECK(snprintf(alloca_line, line_size,
"%s - %s [%s] \"%s %s\" 200 %llu\n",
host_, account_, date,
upload == 0 ? "GET" : "PUT", quoted_filename,
(unsigned long long) size), line_size)) {
altlog_write(alloca_line);
}
if (quoted_filename != filename) {
free(quoted_filename);
}
ALLOCA_FREE(alloca_line);
return 0;
}
/* WuFTPd-like log format */
static int altlog_writexfer_xferlog(const int upload,
const char * const filename,
const off_t size,
const double duration)
{
char date[sizeof "Mon Apr 13 12:34:56 1975"];
struct tm *tm;
char *alloca_line;
const char *host_ = *host != 0 ? host : "-";
const char *account_ = *account != 0 ? account : "-";
char *quoted_filename;
size_t filename_idx;
time_t now;
size_t line_size;
size_t filename_size;
char c;
if ((now = time(NULL)) == (time_t) -1 ||
(tm = localtime(&now)) == NULL ||
tm->tm_mon > 11 || tm->tm_mon < 0 ||
tm->tm_wday > 6 || tm->tm_wday < 0) {
return -1;
}
if (SNCHECK(snprintf(date, sizeof date,
"%s %s %02d %02d:%02d:%02d %d",
week_days[tm->tm_wday], months[tm->tm_mon],
tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec,
tm->tm_year + 1900), sizeof date)) {
return -1;
}
if ((filename_idx = strlen(filename)) <= (size_t) 0U) {
return -1;
}
filename_size = filename_idx + (size_t) 1U;
if ((quoted_filename = ALLOCA(filename_size)) == NULL) {
return -1;
}
quoted_filename[filename_idx] = 0;
do {
filename_idx--;
c = filename[filename_idx];
if (isspace((unsigned char) c) || ISCTRLCODE(c)) {
c = '_';
}
quoted_filename[filename_idx] = c;
} while (filename_idx > (size_t) 0U);
line_size = (sizeof date - 1U) + (sizeof " " - 1U) +
(size_t) 16U /* duration */ + (sizeof " " - 1U) +
strlen(host_) + (sizeof " " - 1U) +
(size_t) 20U /* size */ + (sizeof " " - 1U) +
(filename_size - 1U) + (sizeof " " - 1U) +
(size_t) 1U /* type */ + (sizeof " _ " - 1U) +
(size_t) 1U /* direction */ + (sizeof " " - 1U) +
(size_t) 1U /* anonymous */ + (sizeof " " - 1U) +
strlen(account_) + (sizeof " ftp 1 * c\n" - 1U) + (size_t) 1U;
if ((alloca_line = ALLOCA(line_size)) == NULL) {
ALLOCA_FREE(quoted_filename);
return -1;
}
if (!SNCHECK(snprintf(alloca_line, line_size,
"%s %lu %s %llu %s %c _ %c %c %s ftp 1 * c\n",
date, (unsigned long) (duration + 0.5),
host_, (unsigned long long) size,
quoted_filename,
type == 1 ? 'a' : 'b',
upload != 0 ? 'i' : 'o',
loggedin != 0 ? 'r' : 'a',
account_), line_size)) {
altlog_write(alloca_line);
}
ALLOCA_FREE(quoted_filename);
ALLOCA_FREE(alloca_line);
return 0;
}
static int altlog_writexfer_w3c(const int upload,
const char * const filename,
const off_t size,
const double duration)
{
/*
* <date> <time> <ip> "[]sent" <file> "226" <user>
* date time c-ip cs-method cs-uri-stem sc-status cs-username
*/
struct tm *tm;
struct tm gmt;
const char *host_ = *host != 0 ? host : "-";
const char *account_ = *account != 0 ? account : "-";
char *alloca_line;
char *quoted_filename;
time_t now;
size_t line_size;
(void) duration;
if ((now = time(NULL)) == (time_t) -1 ||
(tm = localtime(&now)) == NULL ||
tm->tm_mon > 11 || tm->tm_mon < 0) {
return -1;
}
gmt = *gmtime(&now);
if ((quoted_filename = urlencode(filename)) == NULL) {
return -1;
}
line_size = (sizeof "13-04-1975 12:34:56 " - 1U) +
strlen(host_) + 1U + (sizeof "[]created" - 1U) + 1U +
strlen(quoted_filename) + 1U + (sizeof "226" - 1U) +
strlen(account_) + 1U + 42U + 1U /* \n */ + 1U;
if ((alloca_line = ALLOCA(line_size)) == NULL) {
return -1;
}
if (!SNCHECK(snprintf(alloca_line, line_size,
"%d-%02d-%02d %02d:%02d:%02d %s []%s %s 226 %s %llu\n",
gmt.tm_year + 1900, gmt.tm_mon + 1, gmt.tm_mday,
gmt.tm_hour, gmt.tm_min, gmt.tm_sec,
host_, (upload != 0 ? "created" : "sent"),
quoted_filename,
account, (unsigned long long) size), line_size)) {
altlog_write(alloca_line);
}
if (quoted_filename != filename) {
free(quoted_filename);
}
ALLOCA_FREE(alloca_line);
return 0;
}
int altlog_write_w3c_header(void)
{
time_t now;
struct tm *tm;
struct tm gmt;
char *alloca_line;
size_t line_size;
if ((now = time(NULL)) == (time_t) -1 ||
(tm = localtime(&now)) == NULL ||
tm->tm_mon > 11 || tm->tm_mon < 0) {
return -1;
}
gmt = *gmtime(&now);
line_size = sizeof "#Date: 001975-04-13 12:34:56\n"; /* be year-999999 compliant :) */
if ((alloca_line = ALLOCA(line_size)) == NULL) {
return -1;
}
altlog_write("#Software: Pure-FTPd " VERSION "\n");
altlog_write("#Version: 1.0\n");
if (!SNCHECK(snprintf(alloca_line, line_size,
"#Date: %04d-%02d-%02d %02d:%02d:%02d\n",
gmt.tm_year + 1900, gmt.tm_mon + 1, gmt.tm_mday,
gmt.tm_hour, gmt.tm_min, gmt.tm_sec),
line_size)) {
altlog_write(alloca_line);
}
altlog_write("#Fields: date time c-ip cs-method cs-uri-stem sc-status cs-username sc-bytes\n");
ALLOCA_FREE(alloca_line);
return 0;
}
/*
* We should define a structure of function pointers,
* and associate a structure with each logging type in AltLogPrefixes.
* But yet we only have *three* logging methods, and the code would be
* complicated for nothing. So let's stick with simple tests for now. -j.
*/
int altlog_writexfer(const int upload,
const char * const filename,
const off_t size,
const double duration)
{
switch (altlog_format) {
case ALTLOG_NONE:
return 0;
case ALTLOG_CLF:
return altlog_writexfer_clf(upload, filename, size);
case ALTLOG_STATS:
return altlog_writexfer_stats(upload, filename, size, duration);
case ALTLOG_W3C:
return altlog_writexfer_w3c(upload, filename, size, duration);
case ALTLOG_XFERLOG:
return altlog_writexfer_xferlog(upload, filename, size, duration);
}
return -1;
}
#endif
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