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/*
* ProFTPD - mod_proxy Inet implementation
* Copyright (c) 2015-2021 TJ Saunders
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA.
*
* As a special exemption, TJ Saunders and other respective copyright holders
* give permission to link this program with OpenSSL, and distribute the
* resulting executable, without including the source code for OpenSSL in the
* source distribution.
*/
#include "mod_proxy.h"
#include "proxy/netio.h"
#include "proxy/inet.h"
conn_t *proxy_inet_accept(pool *p, conn_t *data_conn, conn_t *ctrl_conn,
int rfd, int wfd, int resolve) {
int xerrno;
conn_t *conn;
pr_netio_t *curr_netio;
curr_netio = proxy_netio_unset(PR_NETIO_STRM_DATA, "inet_accept");
conn = pr_inet_accept(p, data_conn, ctrl_conn, rfd, wfd,
(unsigned char) resolve);
xerrno = errno;
proxy_netio_set(PR_NETIO_STRM_DATA, curr_netio);
errno = xerrno;
return conn;
}
void proxy_inet_close(pool *p, conn_t *conn) {
if (conn != NULL) {
/* Note that we do our own close here, rather than relying on the
* core Inet's close, as that one simply relies on the connection
* cleanup callback -- and we want to use our own Proxy Netio API
* functions for closing, too.
*/
/* Shutdowns first, then closes. */
if (conn->instrm != NULL) {
proxy_netio_shutdown(conn->instrm, 0);
}
if (conn->outstrm != NULL) {
proxy_netio_shutdown(conn->outstrm, 1);
}
if (conn->instrm != NULL) {
proxy_netio_close(conn->instrm);
conn->instrm = NULL;
}
if (conn->outstrm != NULL) {
proxy_netio_close(conn->outstrm);
conn->outstrm = NULL;
}
if (conn->listen_fd != -1) {
(void) close(conn->listen_fd);
conn->listen_fd = -1;
}
if (conn->rfd != -1) {
(void) close(conn->rfd);
conn->rfd = -1;
}
if (conn->wfd != -1) {
(void) close(conn->wfd);
conn->wfd = -1;
}
}
}
int proxy_inet_connect(pool *p, conn_t *conn, const pr_netaddr_t *addr,
int port) {
int instrm_type = -1, outstrm_type = -1, res, xerrno;
pr_netio_t *in_netio = NULL, *out_netio = NULL;
if (conn != NULL) {
if (conn->instrm != NULL) {
instrm_type = conn->instrm->strm_type;
in_netio = proxy_netio_unset(instrm_type, "inet_connect");
}
if (conn->outstrm != NULL) {
outstrm_type = conn->outstrm->strm_type;
if (outstrm_type != instrm_type) {
out_netio = proxy_netio_unset(outstrm_type, "inet_connect");
}
}
}
res = pr_inet_connect(p, conn, addr, port);
xerrno = errno;
if (in_netio != NULL) {
proxy_netio_set(instrm_type, in_netio);
}
if (out_netio != NULL) {
proxy_netio_set(outstrm_type, out_netio);
}
errno = xerrno;
return res;
}
int proxy_inet_listen(pool *p, conn_t *conn, int backlog, int flags) {
int instrm_type = -1, outstrm_type = -1, res, xerrno;
pr_netio_t *in_netio = NULL, *out_netio = NULL;
if (conn != NULL) {
if (conn->instrm != NULL) {
instrm_type = conn->instrm->strm_type;
in_netio = proxy_netio_unset(instrm_type, "inet_listen");
}
if (conn->outstrm != NULL) {
outstrm_type = conn->outstrm->strm_type;
if (outstrm_type != instrm_type) {
out_netio = proxy_netio_unset(outstrm_type, "inet_listen");
}
}
}
res = pr_inet_listen(p, conn, backlog, flags);
xerrno = errno;
if (in_netio != NULL) {
proxy_netio_set(instrm_type, in_netio);
}
if (out_netio != NULL) {
proxy_netio_set(outstrm_type, out_netio);
}
errno = xerrno;
return res;
}
conn_t *proxy_inet_openrw(pool *p, conn_t *conn, const pr_netaddr_t *addr,
int strm_type, int fd, int rfd, int wfd, int resolve) {
int xerrno;
conn_t *new_conn;
pr_netio_t *curr_netio = NULL;
curr_netio = proxy_netio_unset(strm_type, "inet_openrw");
new_conn = pr_inet_openrw(p, conn, addr, strm_type, fd, rfd, wfd, resolve);
xerrno = errno;
proxy_netio_set(strm_type, curr_netio);
if (new_conn != NULL) {
/* Note: pr_inet_openrw() calls pr_inet_copy_conn(), which registers
* a cleanup on the create object. But we clean up our own data,
* so that cleanup, when run, will attempt a double-free. Thus we
* unregister that cleanup here.
*/
unregister_cleanup(new_conn->pool, new_conn, NULL);
}
errno = xerrno;
return new_conn;
}
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