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-rw-r--r--push.c458
1 files changed, 0 insertions, 458 deletions
diff --git a/push.c b/push.c
deleted file mode 100644
index 08c7f99..0000000
--- a/push.c
+++ /dev/null
@@ -1,458 +0,0 @@
-/*
- * 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) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
- *
- * 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 (see the file COPYING included with this
- * distribution); if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include "syshead.h"
-
-#include "push.h"
-#include "options.h"
-#include "ssl.h"
-#include "manage.h"
-
-#include "memdbg.h"
-
-#if P2MP
-
-/*
- * Auth username/password
- *
- * Client received an authentication failed message from server.
- * Runs on client.
- */
-void
-receive_auth_failed (struct context *c, const struct buffer *buffer)
-{
- msg (M_VERB0, "AUTH: Received AUTH_FAILED control message");
- connection_list_set_no_advance(&c->options);
- if (c->options.pull)
- {
- switch (auth_retry_get ())
- {
- case AR_NONE:
- c->sig->signal_received = SIGTERM; /* SOFT-SIGTERM -- Auth failure error */
- break;
- case AR_INTERACT:
- ssl_purge_auth ();
- case AR_NOINTERACT:
- c->sig->signal_received = SIGUSR1; /* SOFT-SIGUSR1 -- Auth failure error */
- break;
- default:
- ASSERT (0);
- }
- c->sig->signal_text = "auth-failure";
-#ifdef ENABLE_MANAGEMENT
- if (management)
- {
- const char *reason = NULL;
- struct buffer buf = *buffer;
- if (buf_string_compare_advance (&buf, "AUTH_FAILED,") && BLEN (&buf))
- reason = BSTR (&buf);
- management_auth_failure (management, UP_TYPE_AUTH, reason);
- } else
-#endif
- {
-#ifdef ENABLE_CLIENT_CR
- struct buffer buf = *buffer;
- if (buf_string_match_head_str (&buf, "AUTH_FAILED,CRV1:") && BLEN (&buf))
- {
- buf_advance (&buf, 12); /* Length of "AUTH_FAILED," substring */
- ssl_put_auth_challenge (BSTR (&buf));
- }
-#endif
- }
- }
-}
-
-/*
- * Act on received restart message from server
- */
-void
-server_pushed_restart (struct context *c, const struct buffer *buffer)
-{
- if (c->options.pull)
- {
- msg (D_STREAM_ERRORS, "Connection reset command was pushed by server");
- c->sig->signal_received = SIGUSR1; /* SOFT-SIGUSR1 -- server-pushed connection reset */
- c->sig->signal_text = "server-pushed-connection-reset";
- }
-}
-
-#if P2MP_SERVER
-
-/*
- * Send auth failed message from server to client.
- */
-void
-send_auth_failed (struct context *c, const char *client_reason)
-{
- struct gc_arena gc = gc_new ();
- static const char auth_failed[] = "AUTH_FAILED";
- size_t len;
-
- schedule_exit (c, c->options.scheduled_exit_interval, SIGTERM);
-
- len = (client_reason ? strlen(client_reason)+1 : 0) + sizeof(auth_failed);
- if (len > PUSH_BUNDLE_SIZE)
- len = PUSH_BUNDLE_SIZE;
-
- {
- struct buffer buf = alloc_buf_gc (len, &gc);
- buf_printf (&buf, auth_failed);
- if (client_reason)
- buf_printf (&buf, ",%s", client_reason);
- send_control_channel_string (c, BSTR (&buf), D_PUSH);
- }
-
- gc_free (&gc);
-}
-
-/*
- * Send restart message from server to client.
- */
-void
-send_restart (struct context *c)
-{
- schedule_exit (c, c->options.scheduled_exit_interval, SIGTERM);
- send_control_channel_string (c, "RESTART", D_PUSH);
-}
-
-#endif
-
-/*
- * Push/Pull
- */
-
-void
-incoming_push_message (struct context *c, const struct buffer *buffer)
-{
- struct gc_arena gc = gc_new ();
- unsigned int option_types_found = 0;
- int status;
-
- msg (D_PUSH, "PUSH: Received control message: '%s'", BSTR (buffer));
-
- status = process_incoming_push_msg (c,
- buffer,
- c->options.pull,
- pull_permission_mask (c),
- &option_types_found);
-
- if (status == PUSH_MSG_ERROR)
- msg (D_PUSH_ERRORS, "WARNING: Received bad push/pull message: %s", BSTR (buffer));
- else if (status == PUSH_MSG_REPLY || status == PUSH_MSG_CONTINUATION)
- {
- if (status == PUSH_MSG_REPLY)
- do_up (c, true, option_types_found); /* delay bringing tun/tap up until --push parms received from remote */
- event_timeout_clear (&c->c2.push_request_interval);
- }
-
- gc_free (&gc);
-}
-
-bool
-send_push_request (struct context *c)
-{
- return send_control_channel_string (c, "PUSH_REQUEST", D_PUSH);
-}
-
-#if P2MP_SERVER
-
-bool
-send_push_reply (struct context *c)
-{
- struct gc_arena gc = gc_new ();
- struct buffer buf = alloc_buf_gc (PUSH_BUNDLE_SIZE, &gc);
- struct push_entry *e = c->options.push_list.head;
- bool multi_push = false;
- static char cmd[] = "PUSH_REPLY";
- const int extra = 64; /* extra space for possible trailing ifconfig and push-continuation */
- const int safe_cap = BCAP (&buf) - extra;
- bool push_sent = false;
-
- buf_printf (&buf, "%s", cmd);
-
- while (e)
- {
- if (e->enable)
- {
- const int l = strlen (e->option);
- if (BLEN (&buf) + l >= safe_cap)
- {
- buf_printf (&buf, ",push-continuation 2");
- {
- const bool status = send_control_channel_string (c, BSTR (&buf), D_PUSH);
- if (!status)
- goto fail;
- push_sent = true;
- multi_push = true;
- buf_reset_len (&buf);
- buf_printf (&buf, "%s", cmd);
- }
- }
- if (BLEN (&buf) + l >= safe_cap)
- {
- msg (M_WARN, "--push option is too long");
- goto fail;
- }
- buf_printf (&buf, ",%s", e->option);
- }
- e = e->next;
- }
-
- if (c->c2.push_ifconfig_defined && c->c2.push_ifconfig_local && c->c2.push_ifconfig_remote_netmask)
- buf_printf (&buf, ",ifconfig %s %s",
- print_in_addr_t (c->c2.push_ifconfig_local, 0, &gc),
- print_in_addr_t (c->c2.push_ifconfig_remote_netmask, 0, &gc));
- if (multi_push)
- buf_printf (&buf, ",push-continuation 1");
-
- if (BLEN (&buf) > sizeof(cmd)-1)
- {
- const bool status = send_control_channel_string (c, BSTR (&buf), D_PUSH);
- if (!status)
- goto fail;
- push_sent = true;
- }
-
- /* If nothing have been pushed, send an empty push,
- * as the client is expecting a response
- */
- if (!push_sent)
- {
- bool status = false;
-
- buf_reset_len (&buf);
- buf_printf (&buf, "%s", cmd);
- status = send_control_channel_string (c, BSTR(&buf), D_PUSH);
- if (!status)
- goto fail;
- }
-
- gc_free (&gc);
- return true;
-
- fail:
- gc_free (&gc);
- return false;
-}
-
-static void
-push_option_ex (struct options *o, const char *opt, bool enable, int msglevel)
-{
- if (!string_class (opt, CC_ANY, CC_COMMA))
- {
- msg (msglevel, "PUSH OPTION FAILED (illegal comma (',') in string): '%s'", opt);
- }
- else
- {
- struct push_entry *e;
- ALLOC_OBJ_CLEAR_GC (e, struct push_entry, &o->gc);
- e->enable = true;
- e->option = opt;
- if (o->push_list.head)
- {
- ASSERT(o->push_list.tail);
- o->push_list.tail->next = e;
- o->push_list.tail = e;
- }
- else
- {
- ASSERT(!o->push_list.tail);
- o->push_list.head = e;
- o->push_list.tail = e;
- }
- }
-}
-
-void
-push_option (struct options *o, const char *opt, int msglevel)
-{
- push_option_ex (o, opt, true, msglevel);
-}
-
-void
-clone_push_list (struct options *o)
-{
- if (o->push_list.head)
- {
- const struct push_entry *e = o->push_list.head;
- push_reset (o);
- while (e)
- {
- push_option_ex (o, string_alloc (e->option, &o->gc), true, M_FATAL);
- e = e->next;
- }
- }
-}
-
-void
-push_options (struct options *o, char **p, int msglevel, struct gc_arena *gc)
-{
- const char **argv = make_extended_arg_array (p, gc);
- char *opt = print_argv (argv, gc, 0);
- push_option (o, opt, msglevel);
-}
-
-void
-push_reset (struct options *o)
-{
- CLEAR (o->push_list);
-}
-#endif
-
-int
-process_incoming_push_msg (struct context *c,
- const struct buffer *buffer,
- bool honor_received_options,
- unsigned int permission_mask,
- unsigned int *option_types_found)
-{
- int ret = PUSH_MSG_ERROR;
- struct buffer buf = *buffer;
-
-#if P2MP_SERVER
- if (buf_string_compare_advance (&buf, "PUSH_REQUEST"))
- {
- if (tls_authentication_status (c->c2.tls_multi, 0) == TLS_AUTHENTICATION_FAILED || c->c2.context_auth == CAS_FAILED)
- {
- const char *client_reason = tls_client_reason (c->c2.tls_multi);
- send_auth_failed (c, client_reason);
- ret = PUSH_MSG_AUTH_FAILURE;
- }
- else if (!c->c2.push_reply_deferred && c->c2.context_auth == CAS_SUCCEEDED)
- {
- if (send_push_reply (c))
- ret = PUSH_MSG_REQUEST;
- }
- else
- {
- ret = PUSH_MSG_REQUEST_DEFERRED;
- }
- }
- else
-#endif
-
- if (honor_received_options && buf_string_compare_advance (&buf, "PUSH_REPLY"))
- {
- const uint8_t ch = buf_read_u8 (&buf);
- if (ch == ',')
- {
- struct buffer buf_orig = buf;
- if (!c->c2.did_pre_pull_restore)
- {
- pre_pull_restore (&c->options);
- md5_state_init (&c->c2.pulled_options_state);
- c->c2.did_pre_pull_restore = true;
- }
- if (apply_push_options (&c->options,
- &buf,
- permission_mask,
- option_types_found,
- c->c2.es))
- switch (c->options.push_continuation)
- {
- case 0:
- case 1:
- md5_state_update (&c->c2.pulled_options_state, BPTR(&buf_orig), BLEN(&buf_orig));
- md5_state_final (&c->c2.pulled_options_state, &c->c2.pulled_options_digest);
- ret = PUSH_MSG_REPLY;
- break;
- case 2:
- md5_state_update (&c->c2.pulled_options_state, BPTR(&buf_orig), BLEN(&buf_orig));
- ret = PUSH_MSG_CONTINUATION;
- break;
- }
- }
- else if (ch == '\0')
- {
- ret = PUSH_MSG_REPLY;
- }
- /* show_settings (&c->options); */
- }
- return ret;
-}
-
-#if P2MP_SERVER
-
-/*
- * Remove iroutes from the push_list.
- */
-void
-remove_iroutes_from_push_route_list (struct options *o)
-{
- if (o && o->push_list.head && o->iroutes)
- {
- struct gc_arena gc = gc_new ();
- struct push_entry *e = o->push_list.head;
-
- /* cycle through the push list */
- while (e)
- {
- char *p[MAX_PARMS];
- bool enable = true;
-
- /* parse the push item */
- CLEAR (p);
- if (parse_line (e->option, p, SIZE (p), "[PUSH_ROUTE_REMOVE]", 1, D_ROUTE_DEBUG, &gc))
- {
- /* is the push item a route directive? */
- if (p[0] && !strcmp (p[0], "route") && !p[3])
- {
- /* get route parameters */
- bool status1, status2;
- const in_addr_t network = getaddr (GETADDR_HOST_ORDER, p[1], 0, &status1, NULL);
- const in_addr_t netmask = getaddr (GETADDR_HOST_ORDER, p[2] ? p[2] : "255.255.255.255", 0, &status2, NULL);
-
- /* did route parameters parse correctly? */
- if (status1 && status2)
- {
- const struct iroute *ir;
-
- /* does route match an iroute? */
- for (ir = o->iroutes; ir != NULL; ir = ir->next)
- {
- if (network == ir->network && netmask == netbits_to_netmask (ir->netbits >= 0 ? ir->netbits : 32))
- {
- enable = false;
- break;
- }
- }
- }
- }
- }
-
- /* should we copy the push item? */
- e->enable = enable;
- if (!enable)
- msg (D_PUSH, "REMOVE PUSH ROUTE: '%s'", e->option);
-
- e = e->next;
- }
-
- gc_free (&gc);
- }
-}
-
-#endif
-
-#endif