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/*
* OpenConnect (SSL + DTLS) VPN client
*
* Copyright © 2020 David Woodhouse
*
* Author: David Woodhouse <dwmw2@infradead.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* version 2.1, as published by the Free Software Foundation.
*
* 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
* Lesser General Public License for more details.
*/
#include <config.h>
#include "openconnect-internal.h"
#include "ppp.h"
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <time.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
int nullppp_obtain_cookie(struct openconnect_info *vpninfo)
{
if (!(vpninfo->cookie = strdup("")))
return -ENOMEM;
return 0;
}
int nullppp_connect(struct openconnect_info *vpninfo)
{
int ret;
int ipv4, ipv6, hdlc;
/* XX: cookie hack. Use -C hdlc,noipv4,noipv6,term on the
* command line to set options. */
hdlc = strstr(vpninfo->cookie, "hdlc") ? 1 : 0;
ipv4 = strstr(vpninfo->cookie, "noipv4") ? 0 : 1;
ipv6 = strstr(vpninfo->cookie, "noipv6") ? 0 : 1;
/* Now establish the actual connection */
ret = openconnect_open_https(vpninfo);
if (ret)
goto out;
ret = openconnect_ppp_new(vpninfo,
hdlc ? PPP_ENCAP_RFC1662_HDLC : PPP_ENCAP_RFC1661,
ipv4, ipv6);
if (!ret) {
/* Trigger the first PPP negotiations and ensure the PPP state
* is PPPS_ESTABLISH so that ppp_tcp_mainloop() knows we've started. */
ppp_start_tcp_mainloop(vpninfo);
}
out:
if (ret)
openconnect_close_https(vpninfo, 0);
else {
monitor_fd_new(vpninfo, ssl);
monitor_read_fd(vpninfo, ssl);
monitor_except_fd(vpninfo, ssl);
}
return ret;
}
int nullppp_mainloop(struct openconnect_info *vpninfo, int *timeout, int readable)
{
if (vpninfo->ppp->ppp_state >= PPPS_NETWORK &&
strstr(vpninfo->cookie, "term")) {
vpninfo->got_cancel_cmd = 1;
vpn_progress(vpninfo, PRG_ERR,
_("Terminating because nullppp has reached network state.\n"));
}
return ppp_tcp_mainloop(vpninfo, timeout, readable);
}
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