libetpan - fdik
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/*
* libEtPan! -- a mail stuff library
*
* Copyright (C) 2001, 2005 - DINH Viet Hoa
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the libEtPan! project nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* $Id: mailstream_low.c,v 1.27 2011/05/04 16:09:54 hoa Exp $
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "mailstream_low.h"
#include <stdlib.h>
#ifdef LIBETPAN_MAILSTREAM_DEBUG
#define STREAM_DEBUG
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include "maillock.h"
#ifdef WIN32
# include "win_etpan.h"
#endif
#include "mailstream_cfstream.h"
#include "mailstream_compress.h"
#include "mailstream_cancel.h"
#define LOG_FILE "libetpan-stream-debug.log"
LIBETPAN_EXPORT
int mailstream_debug = 0;
LIBETPAN_EXPORT
void (* mailstream_logger)(int direction,
const char * str, size_t size) = NULL;
LIBETPAN_EXPORT
void (* mailstream_logger_id)(mailstream_low * s, int is_stream_data, int direction,
const char * str, size_t size) = NULL;
static inline void mailstream_logger_internal(mailstream_low * s, int is_stream_data, int direction,
const char * buffer, size_t size);
// Will log a buffer.
#define STREAM_LOG_ERROR(low, direction, buf, size) \
mailstream_logger_internal(low, 2, direction, buf, size); \
if (mailstream_debug) { \
if (mailstream_logger_id != NULL) { \
mailstream_logger_id(low, 2, direction, buf, size); \
} \
else if (mailstream_logger != NULL) { \
mailstream_logger(direction, buf, size); \
} \
else { \
FILE * f; \
mode_t old_mask; \
\
old_mask = umask(0077); \
f = fopen(LOG_FILE, "a"); \
umask(old_mask); \
if (f != NULL) { \
int nmemb; \
maillock_write_lock(LOG_FILE, fileno(f)); \
nmemb = fwrite((buf), 1, (size), f); \
maillock_write_unlock(LOG_FILE, fileno(f)); \
fclose(f); \
} \
} \
}
// Will log a buffer.
#define STREAM_LOG_BUF(low, direction, buf, size) \
mailstream_logger_internal(low, 1, direction, buf, size); \
if (mailstream_debug) { \
if (mailstream_logger_id != NULL) { \
mailstream_logger_id(low, 1, direction, buf, size); \
} \
else if (mailstream_logger != NULL) { \
mailstream_logger(direction, buf, size); \
} \
else { \
FILE * f; \
mode_t old_mask; \
\
old_mask = umask(0077); \
f = fopen(LOG_FILE, "a"); \
umask(old_mask); \
if (f != NULL) { \
int nmemb; \
maillock_write_lock(LOG_FILE, fileno(f)); \
nmemb = fwrite((buf), 1, (size), f); \
maillock_write_unlock(LOG_FILE, fileno(f)); \
fclose(f); \
} \
} \
}
// Will log some log text string.
#define STREAM_LOG(low, direction, str) \
mailstream_logger_internal(low, 0, direction, str, strlen(str)); \
if (mailstream_debug) { \
if (mailstream_logger_id != NULL) { \
mailstream_logger_id(low, 0, direction, str, strlen(str)); \
} \
else if (mailstream_logger != NULL) { \
mailstream_logger(direction, str, strlen(str)); \
} \
else { \
FILE * f; \
mode_t old_mask; \
\
old_mask = umask(0077); \
f = fopen(LOG_FILE, "a"); \
umask(old_mask); \
if (f != NULL) { \
int nmemb; \
maillock_write_lock(LOG_FILE, fileno(f)); \
nmemb = fputs((str), f); \
maillock_write_unlock(LOG_FILE, fileno(f)); \
fclose(f); \
} \
} \
}
#else
#define STREAM_LOG_ERROR(low, direction, buf, size) do { } while (0)
#define STREAM_LOG_BUF(low, direction, buf, size) do { } while (0)
#define STREAM_LOG(low, direction, buf) do { } while (0)
#endif
/* general functions */
mailstream_low * mailstream_low_new(void * data,
mailstream_low_driver * driver)
{
mailstream_low * s;
s = malloc(sizeof(* s));
if (s == NULL)
return NULL;
s->data = data;
s->driver = driver;
s->privacy = 1;
s->identifier = NULL;
s->timeout = 0;
s->logger = NULL;
s->logger_context = NULL;
return s;
}
int mailstream_low_close(mailstream_low * s)
{
if (s == NULL)
return -1;
s->driver->mailstream_close(s);
return 0;
}
int mailstream_low_get_fd(mailstream_low * s)
{
if (s == NULL)
return -1;
return s->driver->mailstream_get_fd(s);
}
struct mailstream_cancel * mailstream_low_get_cancel(mailstream_low * s)
{
if (s == NULL)
return NULL;
if (s->driver->mailstream_get_cancel == NULL)
return NULL;
return s->driver->mailstream_get_cancel(s);
}
void mailstream_low_free(mailstream_low * s)
{
free(s->identifier);
s->identifier = NULL;
s->driver->mailstream_free(s);
}
ssize_t mailstream_low_read(mailstream_low * s, void * buf, size_t count)
{
ssize_t r;
if (s == NULL)
return -1;
r = s->driver->mailstream_read(s, buf, count);
#ifdef STREAM_DEBUG
if (r > 0) {
STREAM_LOG(s, 0, "<<<<<<< read <<<<<<\n");
STREAM_LOG_BUF(s, 0, buf, r);
STREAM_LOG(s, 0, "\n");
STREAM_LOG(s, 0, "<<<<<<< end read <<<<<<\n");
}
#endif
if (r < 0) {
STREAM_LOG_ERROR(s, 4, buf, 0);
}
return r;
}
ssize_t mailstream_low_write(mailstream_low * s,
const void * buf, size_t count)
{
ssize_t r;
if (s == NULL)
return -1;
#ifdef STREAM_DEBUG
STREAM_LOG(s, 1, ">>>>>>> send >>>>>>\n");
if (s->privacy) {
STREAM_LOG_BUF(s, 1, buf, count);
}
else {
STREAM_LOG_BUF(s, 2, buf, count);
}
STREAM_LOG(s, 1, "\n");
STREAM_LOG(s, 1, ">>>>>>> end send >>>>>>\n");
#endif
r = s->driver->mailstream_write(s, buf, count);
if (r < 0) {
STREAM_LOG_ERROR(s, 4 | 1, buf, 0);
}
return r;
}
void mailstream_low_cancel(mailstream_low * s)
{
if (s == NULL)
return;
if (s->driver->mailstream_cancel == NULL)
return;
s->driver->mailstream_cancel(s);
}
void mailstream_low_log_error(mailstream_low * s,
const void * buf, size_t count)
{
STREAM_LOG_ERROR(s, 0, buf, count);
}
void mailstream_low_set_privacy(mailstream_low * s, int can_be_public)
{
s->privacy = can_be_public;
}
int mailstream_low_set_identifier(mailstream_low * s,
char * identifier)
{
free(s->identifier);
s->identifier = NULL;
if (identifier != NULL) {
s->identifier = identifier;
}
return 0;
}
const char * mailstream_low_get_identifier(mailstream_low * s)
{
return s->identifier;
}
void mailstream_low_set_timeout(mailstream_low * s,
time_t timeout)
{
s->timeout = timeout;
}
time_t mailstream_low_get_timeout(mailstream_low * s)
{
return s->timeout;
}
void mailstream_low_set_logger(mailstream_low * s, void (* logger)(mailstream_low * s, int log_type,
const char * str, size_t size, void * context), void * logger_context)
{
s->logger = logger;
s->logger_context = logger_context;
}
static inline void mailstream_logger_internal(mailstream_low * s, int is_stream_data, int direction,
const char * buffer, size_t size)
{
int log_type = -1;
if (s->logger == NULL)
return;
/*
stream data:
0: log
1: buffer
2: error
direction:
4|1: send error
4: receive error
2: sent private data
1: sent data
0: received data
*/
switch (is_stream_data) {
case 0: {
switch (direction) {
case 1:
case 2:
case 4|1:
log_type = MAILSTREAM_LOG_TYPE_INFO_SENT;
break;
case 0:
case 4:
log_type = MAILSTREAM_LOG_TYPE_INFO_RECEIVED;
break;
}
break;
}
case 1: {
switch (direction) {
case 2:
log_type = MAILSTREAM_LOG_TYPE_DATA_SENT_PRIVATE;
break;
case 1:
case 4|1:
log_type = MAILSTREAM_LOG_TYPE_DATA_SENT;
break;
case 0:
case 4:
default:
log_type = MAILSTREAM_LOG_TYPE_DATA_RECEIVED;
break;
}
break;
}
case 2: {
switch (direction) {
case 2:
case 1:
case 4|1:
log_type = MAILSTREAM_LOG_TYPE_ERROR_SENT;
break;
case 4:
log_type = MAILSTREAM_LOG_TYPE_ERROR_RECEIVED;
break;
case 0:
log_type = MAILSTREAM_LOG_TYPE_ERROR_PARSE;
break;
}
break;
}
}
if (log_type == -1)
return;
s->logger(s, log_type, buffer, size, s->logger_context);
}
carray * mailstream_low_get_certificate_chain(mailstream_low * s)
{
if (s == NULL)
return NULL;
if (s->driver->mailstream_get_certificate_chain == NULL)
return NULL;
return s->driver->mailstream_get_certificate_chain(s);
}
int mailstream_low_wait_idle(mailstream_low * low, struct mailstream_cancel * idle,
int max_idle_delay)
{
int fd;
int idle_fd;
int cancel_fd;
int maxfd;
fd_set readfds;
struct timeval delay;
int r;
if (low->driver == mailstream_cfstream_driver) {
return mailstream_low_cfstream_wait_idle(low, max_idle_delay);
}
else if (low->driver == mailstream_compress_driver) {
return mailstream_low_compress_wait_idle(low, idle, max_idle_delay);
}
if (idle == NULL) {
return MAILSTREAM_IDLE_ERROR;
}
if (mailstream_low_get_cancel(low) == NULL) {
return MAILSTREAM_IDLE_ERROR;
}
fd = mailstream_low_get_fd(low);
idle_fd = mailstream_cancel_get_fd(idle);
cancel_fd = mailstream_cancel_get_fd(mailstream_low_get_cancel(low));
FD_ZERO(&readfds);
FD_SET(fd, &readfds);
FD_SET(idle_fd, &readfds);
FD_SET(cancel_fd, &readfds);
maxfd = fd;
if (idle_fd > maxfd) {
maxfd = idle_fd;
}
if (cancel_fd > maxfd) {
maxfd = cancel_fd;
}
delay.tv_sec = max_idle_delay;
delay.tv_usec = 0;
r = select(maxfd + 1, &readfds, NULL, NULL, &delay);
if (r == 0) {
// timeout
return MAILSTREAM_IDLE_TIMEOUT;
}
else if (r == -1) {
// do nothing
return MAILSTREAM_IDLE_ERROR;
}
else {
if (FD_ISSET(fd, &readfds)) {
// has something on socket
return MAILSTREAM_IDLE_HASDATA;
}
if (FD_ISSET(idle_fd, &readfds)) {
// idle interrupted
mailstream_cancel_ack(idle);
return MAILSTREAM_IDLE_INTERRUPTED;
}
if (FD_ISSET(cancel_fd, &readfds)) {
// idle cancelled
mailstream_cancel_ack(mailstream_low_get_cancel(low));
return MAILSTREAM_IDLE_CANCELLED;
}
return MAILSTREAM_IDLE_ERROR;
}
}