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/*
* OpenVPN -- An application to securely tunnel IP networks
* over a single TCP/UDP port, with support for SSL/TLS-based
* session authentication and key exchange,
* packet encryption, packet authentication, and
* packet compression.
*
* Copyright (C) 2002-2023 OpenVPN Inc <sales@openvpn.net>
* Copyright (C) 2010-2021 Fox Crypto B.V. <openvpn@foxcrypto.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* 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 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, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "syshead.h"
#include "options_util.h"
const char *
parse_auth_failed_temp(struct options *o, const char *reason)
{
struct gc_arena gc = gc_new();
const char *message = reason;
char *m = string_alloc(reason, &gc);
/* Check if the message uses the TEMP[flags]: message format*/
char *endofflags = strstr(m, "]");
/* Temporary failure from the server */
if (m[0] == '[' && endofflags)
{
message = strstr(reason, "]") + 1;
/* null terminate the substring to only looks for flags between [ and ] */
*endofflags = '\x00';
const char *token = strtok(m, "[,");
while (token)
{
if (!strncmp(token, "backoff ", strlen("backoff ")))
{
if (sscanf(token, "backoff %d", &o->server_backoff_time) != 1)
{
msg(D_PUSH, "invalid AUTH_FAIL,TEMP flag: %s", token);
o->server_backoff_time = 0;
}
}
else if (!strncmp(token, "advance ", strlen("advance ")))
{
token += strlen("advance ");
if (!strcmp(token, "no"))
{
o->no_advance = true;
}
else if (!strcmp(token, "remote"))
{
o->advance_next_remote = true;
o->no_advance = false;
}
else if (!strcmp(token, "addr"))
{
/* Go on to the next remote */
o->no_advance = false;
}
}
else
{
msg(D_PUSH_ERRORS, "WARNING: unknown AUTH_FAIL,TEMP flag: %s", token);
}
token = strtok(NULL, "[,");
}
}
/* Look for the message in the original buffer to safely be
* able to return it */
if (!message || message[0] != ':')
{
message = "";
}
else
{
/* Skip the : at the beginning */
message += 1;
}
gc_free(&gc);
return message;
}
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