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-rwxr-xr-xconfigure134
-rw-r--r--configure.ac3
-rw-r--r--include/asterisk/autoconfig.h.in3
-rw-r--r--res/res_pjsip_pubsub.c311
-rw-r--r--third-party/pjproject/configure.m41
-rw-r--r--third-party/pjproject/patches/0001-evsub-Add-APIs-to-add-decrement-an-event-subscriptio.patch73
6 files changed, 395 insertions, 130 deletions
diff --git a/configure b/configure
index 04183b401..3aa600442 100755
--- a/configure
+++ b/configure
@@ -923,6 +923,10 @@ PBX_POPT
POPT_DIR
POPT_INCLUDE
POPT_LIB
+PBX_PJSIP_EVSUB_GRP_LOCK
+PJSIP_EVSUB_GRP_LOCK_DIR
+PJSIP_EVSUB_GRP_LOCK_INCLUDE
+PJSIP_EVSUB_GRP_LOCK_LIB
PBX_PJSIP_TLS_TRANSPORT_PROTO
PJSIP_TLS_TRANSPORT_PROTO_DIR
PJSIP_TLS_TRANSPORT_PROTO_INCLUDE
@@ -10576,6 +10580,18 @@ PBX_PJSIP_TLS_TRANSPORT_PROTO=0
+PJSIP_EVSUB_GRP_LOCK_DESCRIP="PJSIP EVSUB Group Lock support"
+PJSIP_EVSUB_GRP_LOCK_OPTION=pjsip
+PJSIP_EVSUB_GRP_LOCK_DIR=${PJPROJECT_DIR}
+
+PBX_PJSIP_EVSUB_GRP_LOCK=0
+
+
+
+
+
+
+
POPT_DESCRIP="popt"
POPT_OPTION="popt"
@@ -13775,7 +13791,7 @@ else
We can't simply define LARGE_OFF_T to be 9223372036854775807,
since some C++ compilers masquerading as C compilers
incorrectly reject 9223372036854775807. */
-#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
&& LARGE_OFF_T % 2147483647 == 1)
? 1 : -1];
@@ -13821,7 +13837,7 @@ else
We can't simply define LARGE_OFF_T to be 9223372036854775807,
since some C++ compilers masquerading as C compilers
incorrectly reject 9223372036854775807. */
-#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
&& LARGE_OFF_T % 2147483647 == 1)
? 1 : -1];
@@ -13845,7 +13861,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
We can't simply define LARGE_OFF_T to be 9223372036854775807,
since some C++ compilers masquerading as C compilers
incorrectly reject 9223372036854775807. */
-#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
&& LARGE_OFF_T % 2147483647 == 1)
? 1 : -1];
@@ -13890,7 +13906,7 @@ else
We can't simply define LARGE_OFF_T to be 9223372036854775807,
since some C++ compilers masquerading as C compilers
incorrectly reject 9223372036854775807. */
-#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
&& LARGE_OFF_T % 2147483647 == 1)
? 1 : -1];
@@ -13914,7 +13930,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
We can't simply define LARGE_OFF_T to be 9223372036854775807,
since some C++ compilers masquerading as C compilers
incorrectly reject 9223372036854775807. */
-#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
+#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
&& LARGE_OFF_T % 2147483647 == 1)
? 1 : -1];
@@ -24740,6 +24756,9 @@ rm -f conftest*
$as_echo "#define HAVE_PJSIP_TLS_TRANSPORT_PROTO 1" >>confdefs.h
+$as_echo "#define HAVE_PJSIP_EVSUB_GRP_LOCK 1" >>confdefs.h
+
+
else
if test "x${PBX_PJPROJECT}" != "x1" -a "${USE_PJPROJECT}" != "no"; then
@@ -25455,6 +25474,111 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
LIBS="${saved_libs}"
CPPFLAGS="${saved_cppflags}"
+
+
+if test "x${PBX_PJSIP_EVSUB_GRP_LOCK}" != "x1" -a "${USE_PJSIP_EVSUB_GRP_LOCK}" != "no"; then
+ pbxlibdir=""
+ # if --with-PJSIP_EVSUB_GRP_LOCK=DIR has been specified, use it.
+ if test "x${PJSIP_EVSUB_GRP_LOCK_DIR}" != "x"; then
+ if test -d ${PJSIP_EVSUB_GRP_LOCK_DIR}/lib; then
+ pbxlibdir="-L${PJSIP_EVSUB_GRP_LOCK_DIR}/lib"
+ else
+ pbxlibdir="-L${PJSIP_EVSUB_GRP_LOCK_DIR}"
+ fi
+ fi
+ pbxfuncname="pjsip_evsub_add_lock"
+ if test "x${pbxfuncname}" = "x" ; then # empty lib, assume only headers
+ AST_PJSIP_EVSUB_GRP_LOCK_FOUND=yes
+ else
+ ast_ext_lib_check_save_CFLAGS="${CFLAGS}"
+ CFLAGS="${CFLAGS} $PJPROJECT_CFLAGS"
+ as_ac_Lib=`$as_echo "ac_cv_lib_pjsip_${pbxfuncname}" | $as_tr_sh`
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ${pbxfuncname} in -lpjsip" >&5
+$as_echo_n "checking for ${pbxfuncname} in -lpjsip... " >&6; }
+if eval \${$as_ac_Lib+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ ac_check_lib_save_LIBS=$LIBS
+LIBS="-lpjsip ${pbxlibdir} $PJPROJECT_LIB $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+/* Override any GCC internal prototype to avoid an error.
+ Use char because int might match the return type of a GCC
+ builtin and then its argument prototype would still apply. */
+#ifdef __cplusplus
+extern "C"
+#endif
+char ${pbxfuncname} ();
+int
+main ()
+{
+return ${pbxfuncname} ();
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ eval "$as_ac_Lib=yes"
+else
+ eval "$as_ac_Lib=no"
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+eval ac_res=\$$as_ac_Lib
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+if eval test \"x\$"$as_ac_Lib"\" = x"yes"; then :
+ AST_PJSIP_EVSUB_GRP_LOCK_FOUND=yes
+else
+ AST_PJSIP_EVSUB_GRP_LOCK_FOUND=no
+fi
+
+ CFLAGS="${ast_ext_lib_check_save_CFLAGS}"
+ fi
+
+ # now check for the header.
+ if test "${AST_PJSIP_EVSUB_GRP_LOCK_FOUND}" = "yes"; then
+ PJSIP_EVSUB_GRP_LOCK_LIB="${pbxlibdir} -lpjsip $PJPROJECT_LIB"
+ # if --with-PJSIP_EVSUB_GRP_LOCK=DIR has been specified, use it.
+ if test "x${PJSIP_EVSUB_GRP_LOCK_DIR}" != "x"; then
+ PJSIP_EVSUB_GRP_LOCK_INCLUDE="-I${PJSIP_EVSUB_GRP_LOCK_DIR}/include"
+ fi
+ PJSIP_EVSUB_GRP_LOCK_INCLUDE="${PJSIP_EVSUB_GRP_LOCK_INCLUDE} $PJPROJECT_CFLAGS"
+ if test "xpjsip.h" = "x" ; then # no header, assume found
+ PJSIP_EVSUB_GRP_LOCK_HEADER_FOUND="1"
+ else # check for the header
+ ast_ext_lib_check_saved_CPPFLAGS="${CPPFLAGS}"
+ CPPFLAGS="${CPPFLAGS} ${PJSIP_EVSUB_GRP_LOCK_INCLUDE}"
+ ac_fn_c_check_header_mongrel "$LINENO" "pjsip.h" "ac_cv_header_pjsip_h" "$ac_includes_default"
+if test "x$ac_cv_header_pjsip_h" = xyes; then :
+ PJSIP_EVSUB_GRP_LOCK_HEADER_FOUND=1
+else
+ PJSIP_EVSUB_GRP_LOCK_HEADER_FOUND=0
+fi
+
+
+ CPPFLAGS="${ast_ext_lib_check_saved_CPPFLAGS}"
+ fi
+ if test "x${PJSIP_EVSUB_GRP_LOCK_HEADER_FOUND}" = "x0" ; then
+ PJSIP_EVSUB_GRP_LOCK_LIB=""
+ PJSIP_EVSUB_GRP_LOCK_INCLUDE=""
+ else
+ if test "x${pbxfuncname}" = "x" ; then # only checking headers -> no library
+ PJSIP_EVSUB_GRP_LOCK_LIB=""
+ fi
+ PBX_PJSIP_EVSUB_GRP_LOCK=1
+ cat >>confdefs.h <<_ACEOF
+#define HAVE_PJSIP_EVSUB_GRP_LOCK 1
+_ACEOF
+
+ fi
+ fi
+fi
+
+
fi
fi
diff --git a/configure.ac b/configure.ac
index 2c47dc453..72a47e2d1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -486,6 +486,7 @@ AST_EXT_LIB_SETUP_OPTIONAL([PJSIP_GET_DEST_INFO], [pjsip_get_dest_info support],
AST_EXT_LIB_SETUP_OPTIONAL([PJ_SSL_CERT_LOAD_FROM_FILES2], [pj_ssl_cert_load_from_files2 support], [PJPROJECT], [pjsip])
AST_EXT_LIB_SETUP_OPTIONAL([PJSIP_EXTERNAL_RESOLVER], [PJSIP External Resolver Support], [PJPROJECT], [pjsip])
AST_EXT_LIB_SETUP_OPTIONAL([PJSIP_TLS_TRANSPORT_PROTO], [PJSIP TLS Transport proto field support], [PJPROJECT], [pjsip])
+AST_EXT_LIB_SETUP_OPTIONAL([PJSIP_EVSUB_GRP_LOCK], [PJSIP EVSUB Group Lock support], [PJPROJECT], [pjsip])
AST_EXT_LIB_SETUP([POPT], [popt], [popt])
AST_EXT_LIB_SETUP([PORTAUDIO], [PortAudio], [portaudio])
@@ -2209,6 +2210,8 @@ if test "$USE_PJPROJECT" != "no" ; then
AST_C_COMPILE_CHECK([PJSIP_TLS_TRANSPORT_PROTO], [struct pjsip_tls_setting setting; int proto; proto = setting.proto;], [pjsip.h])
LIBS="${saved_libs}"
CPPFLAGS="${saved_cppflags}"
+
+ AST_EXT_LIB_CHECK([PJSIP_EVSUB_GRP_LOCK], [pjsip], [pjsip_evsub_add_lock], [pjsip.h], [$PJPROJECT_LIB], [$PJPROJECT_CFLAGS])
fi
fi
diff --git a/include/asterisk/autoconfig.h.in b/include/asterisk/autoconfig.h.in
index 722421228..cd228d7d4 100644
--- a/include/asterisk/autoconfig.h.in
+++ b/include/asterisk/autoconfig.h.in
@@ -586,6 +586,9 @@
/* Define if your system has pjsip_dlg_create_uas_and_inc_lock declared. */
#undef HAVE_PJSIP_DLG_CREATE_UAS_AND_INC_LOCK
+/* Define if your system has PJSIP_EVSUB_GRP_LOCK */
+#undef HAVE_PJSIP_EVSUB_GRP_LOCK
+
/* Define if your system has pjsip_endpt_set_ext_resolver declared. */
#undef HAVE_PJSIP_EXTERNAL_RESOLVER
diff --git a/res/res_pjsip_pubsub.c b/res/res_pjsip_pubsub.c
index 06a1b52b1..4e4180957 100644
--- a/res/res_pjsip_pubsub.c
+++ b/res/res_pjsip_pubsub.c
@@ -378,6 +378,20 @@ struct subscription_persistence {
};
/*!
+ * \brief The state of the subscription tree
+ */
+enum sip_subscription_tree_state {
+ /*! Normal operation */
+ SIP_SUB_TREE_NORMAL = 0,
+ /*! A terminate has been requested by Asterisk, the client, or pjproject */
+ SIP_SUB_TREE_TERMINATE_PENDING,
+ /*! The terminate is in progress */
+ SIP_SUB_TREE_TERMINATE_IN_PROGRESS,
+ /*! The terminate process has finished and the subscription tree is no longer valid */
+ SIP_SUB_TREE_TERMINATED,
+};
+
+/*!
* \brief A tree of SIP subscriptions
*
* Because of the ability to subscribe to resource lists, a SIP
@@ -411,8 +425,8 @@ struct sip_subscription_tree {
int is_list;
/*! Next item in the list */
AST_LIST_ENTRY(sip_subscription_tree) next;
- /*! Indicates that a NOTIFY is currently being sent on the SIP subscription */
- int last_notify;
+ /*! Subscription tree state */
+ enum sip_subscription_tree_state state;
};
/*!
@@ -879,15 +893,15 @@ static void build_node_children(struct ast_sip_endpoint *endpoint, const struct
"allocation error afterwards\n", resource);
continue;
}
- ast_debug(1, "Subscription to leaf resource %s resulted in success. Adding to parent %s\n",
+ ast_debug(2, "Subscription to leaf resource %s resulted in success. Adding to parent %s\n",
resource, parent->resource);
AST_VECTOR_APPEND(&parent->children, current);
} else {
- ast_debug(1, "Subscription to leaf resource %s resulted in error response %d\n",
+ ast_debug(2, "Subscription to leaf resource %s resulted in error response %d\n",
resource, resp);
}
} else {
- ast_debug(1, "Resource %s (child of %s) is a list\n", resource, parent->resource);
+ ast_debug(2, "Resource %s (child of %s) is a list\n", resource, parent->resource);
current = tree_node_alloc(resource, visited, child_list->full_state);
if (!current) {
ast_debug(1, "Cannot build children of resource %s due to allocation failure\n", resource);
@@ -898,7 +912,7 @@ static void build_node_children(struct ast_sip_endpoint *endpoint, const struct
ast_debug(1, "List %s had no successful children.\n", resource);
AST_VECTOR_APPEND(&parent->children, current);
} else {
- ast_debug(1, "List %s had successful children. Adding to parent %s\n",
+ ast_debug(2, "List %s had successful children. Adding to parent %s\n",
resource, parent->resource);
tree_node_destroy(current);
}
@@ -970,7 +984,7 @@ static int build_resource_tree(struct ast_sip_endpoint *endpoint, const struct a
struct resources visited;
if (!has_eventlist_support || !(list = retrieve_resource_list(resource, handler->event_name))) {
- ast_debug(1, "Subscription to resource %s is not to a list\n", resource);
+ ast_debug(2, "Subscription to resource %s is not to a list\n", resource);
tree->root = tree_node_alloc(resource, NULL, 0);
if (!tree->root) {
return 500;
@@ -978,7 +992,7 @@ static int build_resource_tree(struct ast_sip_endpoint *endpoint, const struct a
return handler->notifier->new_subscribe(endpoint, resource);
}
- ast_debug(1, "Subscription to resource %s is a list\n", resource);
+ ast_debug(2, "Subscription to resource %s is a list\n", resource);
if (AST_VECTOR_INIT(&visited, AST_VECTOR_SIZE(&list->items))) {
return 500;
}
@@ -1015,7 +1029,7 @@ static void remove_subscription(struct sip_subscription_tree *obj)
if (i == obj) {
AST_RWLIST_REMOVE_CURRENT(next);
if (i->root) {
- ast_debug(1, "Removing subscription to resource %s from list of subscriptions\n",
+ ast_debug(2, "Removing subscription to resource %s from list of subscriptions\n",
ast_sip_subscription_get_resource_name(i->root));
}
break;
@@ -1307,6 +1321,10 @@ static struct sip_subscription_tree *create_subscription_tree(const struct ast_s
pjsip_evsub_create_uas(dlg, &pubsub_cb, rdata, 0, &sub_tree->evsub);
subscription_setup_dialog(sub_tree, dlg);
+#ifdef HAVE_PJSIP_EVSUB_GRP_LOCK
+ pjsip_evsub_add_ref(sub_tree->evsub);
+#endif
+
ast_sip_mod_data_set(dlg->pool, dlg->mod_data, pubsub_module.id, MOD_DATA_MSG,
pjsip_msg_clone(dlg->pool, rdata->msg_info.msg));
@@ -2230,10 +2248,8 @@ static int send_notify(struct sip_subscription_tree *sub_tree, unsigned int forc
pjsip_msg_add_hdr(tdata->msg, (pjsip_hdr *) require);
}
- if (sub_tree->root->subscription_state == PJSIP_EVSUB_STATE_TERMINATED) {
- sub_tree->last_notify = 1;
- }
if (sip_subscription_send_request(sub_tree, tdata)) {
+ pjsip_tx_data_dec_ref(tdata);
return -1;
}
@@ -2248,21 +2264,32 @@ static int serialized_send_notify(void *userdata)
pjsip_dialog *dlg = sub_tree->dlg;
pjsip_dlg_inc_lock(dlg);
+
/* It's possible that between when the notification was scheduled
- * and now, that a new SUBSCRIBE arrived, requiring full state to be
- * sent out in an immediate NOTIFY. If that has happened, we need to
+ * and now a new SUBSCRIBE arrived requiring full state to be
+ * sent out in an immediate NOTIFY. It's also possible that we're
+ * already processing a terminate. If that has happened, we need to
* bail out here instead of sending the batched NOTIFY.
*/
- if (!sub_tree->send_scheduled_notify) {
+
+ if (sub_tree->state >= SIP_SUB_TREE_TERMINATE_IN_PROGRESS
+ || !sub_tree->send_scheduled_notify) {
pjsip_dlg_dec_lock(dlg);
ao2_cleanup(sub_tree);
return 0;
}
+ if (sub_tree->root->subscription_state == PJSIP_EVSUB_STATE_TERMINATED) {
+ sub_tree->state = SIP_SUB_TREE_TERMINATE_IN_PROGRESS;
+ }
+
send_notify(sub_tree, 0);
- ast_test_suite_event_notify("SUBSCRIPTION_STATE_CHANGED",
- "Resource: %s",
- sub_tree->root->resource);
+
+ ast_test_suite_event_notify(
+ sub_tree->state == SIP_SUB_TREE_TERMINATED
+ ? "SUBSCRIPTION_TERMINATED" : "SUBSCRIPTION_STATE_CHANGED",
+ "Resource: %s", sub_tree->root->resource);
+
sub_tree->notify_sched_id = -1;
pjsip_dlg_dec_lock(dlg);
ao2_cleanup(sub_tree);
@@ -2274,7 +2301,10 @@ static int sched_cb(const void *data)
struct sip_subscription_tree *sub_tree = (struct sip_subscription_tree *) data;
/* We don't need to bump the refcount of sub_tree since we bumped it when scheduling this task */
- ast_sip_push_task(sub_tree->serializer, serialized_send_notify, sub_tree);
+ if (ast_sip_push_task(sub_tree->serializer, serialized_send_notify, sub_tree)) {
+ ao2_cleanup(sub_tree);
+ }
+
return 0;
}
@@ -2285,12 +2315,13 @@ static int schedule_notification(struct sip_subscription_tree *sub_tree)
return 0;
}
+ sub_tree->send_scheduled_notify = 1;
sub_tree->notify_sched_id = ast_sched_add(sched, sub_tree->notification_batch_interval, sched_cb, ao2_bump(sub_tree));
if (sub_tree->notify_sched_id < 0) {
+ ao2_cleanup(sub_tree);
return -1;
}
- sub_tree->send_scheduled_notify = 1;
return 0;
}
@@ -2302,7 +2333,7 @@ int ast_sip_subscription_notify(struct ast_sip_subscription *sub, struct ast_sip
pjsip_dlg_inc_lock(dlg);
- if (!sub->tree->evsub) {
+ if (sub->tree->state != SIP_SUB_TREE_NORMAL) {
pjsip_dlg_dec_lock(dlg);
return 0;
}
@@ -2316,6 +2347,7 @@ int ast_sip_subscription_notify(struct ast_sip_subscription *sub, struct ast_sip
sub->body_changed = 1;
if (terminate) {
sub->subscription_state = PJSIP_EVSUB_STATE_TERMINATED;
+ sub->tree->state = SIP_SUB_TREE_TERMINATE_PENDING;
}
if (sub->tree->notification_batch_interval) {
@@ -2323,6 +2355,9 @@ int ast_sip_subscription_notify(struct ast_sip_subscription *sub, struct ast_sip
} else {
/* See the note in pubsub_on_rx_refresh() for why sub->tree is refbumped here */
ao2_ref(sub->tree, +1);
+ if (terminate) {
+ sub->tree->state = SIP_SUB_TREE_TERMINATE_IN_PROGRESS;
+ }
res = send_notify(sub->tree, 0);
ast_test_suite_event_notify(terminate ? "SUBSCRIPTION_TERMINATED" : "SUBSCRIPTION_STATE_CHANGED",
"Resource: %s",
@@ -3268,71 +3303,72 @@ static void set_state_terminated(struct ast_sip_subscription *sub)
}
}
-/* XXX This function and serialized_pubsub_on_rx_refresh are nearly identical */
-static int serialized_pubsub_on_server_timeout(void *userdata)
-{
- struct sip_subscription_tree *sub_tree = userdata;
- pjsip_dialog *dlg = sub_tree->dlg;
-
- pjsip_dlg_inc_lock(dlg);
- if (!sub_tree->evsub) {
- pjsip_dlg_dec_lock(dlg);
- return 0;
- }
- set_state_terminated(sub_tree->root);
- send_notify(sub_tree, 1);
- ast_test_suite_event_notify("SUBSCRIPTION_TERMINATED",
- "Resource: %s",
- sub_tree->root->resource);
-
- pjsip_dlg_dec_lock(dlg);
- ao2_cleanup(sub_tree);
- return 0;
-}
-
/*!
- * \brief PJSIP callback when underlying SIP subscription changes state
- *
- * This callback is a bit of a mess, because it's not always called when
- * you might expect it to be, and it can be called multiple times for the
- * same state.
+ * \brief Callback sequence for subscription terminate:
*
- * For instance, this function is not called at all when an incoming SUBSCRIBE
- * arrives to refresh a subscription. That makes sense in a way, since the
- * subscription state has not made a change; it was active and remains active.
+ * * Client initiated:
+ * pjproject receives SUBSCRIBE on the subscription's serializer thread
+ * calls pubsub_on_rx_refresh with dialog locked
+ * pubsub_on_rx_refresh sets TERMINATE_PENDING
+ * pushes serialized_pubsub_on_refresh_timeout
+ * returns to pjproject
+ * pjproject calls pubsub_on_evsub_state
+ * pubsub_evsub_set_state checks state == TERMINATE_IN_PROGRESS (no)
+ * ignore and return
+ * pjproject unlocks dialog
+ * serialized_pubsub_on_refresh_timeout starts (1)
+ * locks dialog
+ * checks state == TERMINATE_PENDING
+ * sets TERMINATE_IN_PROGRESS
+ * calls send_notify (2)
+ * send_notify ultimately calls pjsip_evsub_send_request
+ * pjsip_evsub_send_request calls evsub's set_state
+ * set_state calls pubsub_evsub_set_state
+ * pubsub_evsub_set_state checks state == TERMINATE_IN_PROGRESS
+ * removes the subscriptions
+ * cleans up references to evsub
+ * sets state = TERMINATED
+ * serialized_pubsub_on_refresh_timeout unlocks dialog
*
- * However, if an incoming SUBSCRIBE arrives to end a subscription, then this
- * will be called into once upon receiving the SUBSCRIBE (after the call to
- * pubsub_on_rx_refresh) and again when sending a NOTIFY to end the subscription.
- * In both cases, the apparent state of the subscription is "terminated".
+ * * Subscription timer expires:
+ * pjproject timer expires
+ * locks dialog
+ * calls pubsub_on_server_timeout
+ * pubsub_on_server_timeout checks state == NORMAL
+ * sets TERMINATE_PENDING
+ * pushes serialized_pubsub_on_refresh_timeout
+ * returns to pjproject
+ * pjproject unlocks dialog
+ * serialized_pubsub_on_refresh_timeout starts
+ * See (1) Above
*
- * However, the double-terminated state changes don't happen in all cases. For
- * instance, if a subscription expires, then the only time this callback is
- * called is when we send the NOTIFY to end the subscription.
*
- * As far as state changes are concerned, we only ever care about transitions
- * to the "terminated" state. The action we take here is dependent on the
- * conditions behind why the state change to "terminated" occurred. If the
- * state change has occurred because we are sending a NOTIFY to end the
- * subscription, we consider this to be the final hurrah of the subscription
- * and take measures to start shutting things down. If the state change to
- * terminated occurs for a different reason (e.g. transaction timeout,
- * incoming SUBSCRIBE to end the subscription), then we push a task to
- * send out a NOTIFY. When that NOTIFY is sent, this callback will be
- * called again and we will actually shut down the subscription. The
- * subscription tree's last_notify field let's us know if this is being
- * called as a result of a terminating NOTIFY or not.
+ * * ast_sip_subscription_notify is called
+ * checks state == NORMAL
+ * if not batched...
+ * sets TERMINATE_IN_PROGRESS (if terminate is requested)
+ * calls send_notify
+ * See (2) Above
+ * if batched...
+ * sets TERMINATE_PENDING
+ * schedules task
+ * scheduler runs sched_task
+ * sched_task pushes serialized_send_notify
+ * serialized_send_notify starts
+ * checks state <= TERMINATE_PENDING
+ * if state == TERMINATE_PENDING set state = TERMINATE_IN_PROGRESS
+ * call send_notify
+ * See (2) Above
*
- * There is no guarantee that this function will be called from a serializer
- * thread since it can be called due to a transaction timeout. Therefore
- * synchronization primitives are necessary to ensure that no operations
- * step on each others' toes. The dialog lock is always held when this
- * callback is called, so we ensure that relevant structures that may
- * be touched in this function are always protected by the dialog lock
- * elsewhere as well. The dialog lock in particular protects
+ */
+
+/*!
+ * \brief PJSIP callback when underlying SIP subscription changes state
*
- * \li The subscription tree's last_notify field
- * \li The subscription tree's evsub pointer
+ * Although this function is called for every state change, we only care
+ * about the TERMINATED state, and only when we're actually processing the final
+ * notify (SIP_SUB_TREE_TERMINATE_IN_PROGRESS). In this case, we do all
+ * the subscription tree cleanup tasks and decrement the evsub reference.
*/
static void pubsub_on_evsub_state(pjsip_evsub *evsub, pjsip_event *event)
{
@@ -3345,51 +3381,55 @@ static void pubsub_on_evsub_state(pjsip_evsub *evsub, pjsip_event *event)
}
sub_tree = pjsip_evsub_get_mod_data(evsub, pubsub_module.id);
- if (!sub_tree) {
+ if (!sub_tree || sub_tree->state != SIP_SUB_TREE_TERMINATE_IN_PROGRESS) {
+ ast_debug(1, "Possible terminate race prevented %p\n", sub_tree);
return;
}
- if (!sub_tree->last_notify) {
- if (ast_sip_push_task(sub_tree->serializer, serialized_pubsub_on_server_timeout, ao2_bump(sub_tree))) {
- ast_log(LOG_ERROR, "Failed to push task to send final NOTIFY.\n");
- ao2_ref(sub_tree, -1);
- } else {
- return;
- }
- }
-
remove_subscription(sub_tree);
+
pjsip_evsub_set_mod_data(evsub, pubsub_module.id, NULL);
+
+#ifdef HAVE_PJSIP_EVSUB_GRP_LOCK
+ pjsip_evsub_dec_ref(sub_tree->evsub);
+#endif
+
sub_tree->evsub = NULL;
+
ast_sip_dialog_set_serializer(sub_tree->dlg, NULL);
ast_sip_dialog_set_endpoint(sub_tree->dlg, NULL);
+
subscription_persistence_remove(sub_tree);
shutdown_subscriptions(sub_tree->root);
+ sub_tree->state = SIP_SUB_TREE_TERMINATED;
/* Remove evsub's reference to the sub_tree */
ao2_ref(sub_tree, -1);
}
-static int serialized_pubsub_on_rx_refresh(void *userdata)
+static int serialized_pubsub_on_refresh_timeout(void *userdata)
{
struct sip_subscription_tree *sub_tree = userdata;
pjsip_dialog *dlg = sub_tree->dlg;
pjsip_dlg_inc_lock(dlg);
- if (!sub_tree->evsub) {
+ if (sub_tree->state >= SIP_SUB_TREE_TERMINATE_IN_PROGRESS) {
+ ast_debug(1, "Possible terminate race prevented %p %d\n", sub_tree->evsub, sub_tree->state);
pjsip_dlg_dec_lock(dlg);
+ ao2_cleanup(sub_tree);
return 0;
}
- if (pjsip_evsub_get_state(sub_tree->evsub) == PJSIP_EVSUB_STATE_TERMINATED) {
+ if (sub_tree->state == SIP_SUB_TREE_TERMINATE_PENDING) {
+ sub_tree->state = SIP_SUB_TREE_TERMINATE_IN_PROGRESS;
set_state_terminated(sub_tree->root);
}
send_notify(sub_tree, 1);
ast_test_suite_event_notify(sub_tree->root->subscription_state == PJSIP_EVSUB_STATE_TERMINATED ?
- "SUBSCRIPTION_TERMINATED" : "SUBSCRIPTION_REFRESHED",
- "Resource: %s", sub_tree->root->resource);
+ "SUBSCRIPTION_TERMINATED" : "SUBSCRIPTION_REFRESHED",
+ "Resource: %s", sub_tree->root->resource);
pjsip_dlg_dec_lock(dlg);
ao2_cleanup(sub_tree);
@@ -3402,10 +3442,8 @@ static int serialized_pubsub_on_rx_refresh(void *userdata)
* This includes both SUBSCRIBE requests that actually refresh the subscription
* as well as SUBSCRIBE requests that end the subscription.
*
- * In the case where the SUBSCRIBE is actually refreshing the subscription we
- * push a task to send an appropriate NOTIFY request. In the case where the
- * SUBSCRIBE is ending the subscription, we let the pubsub_on_evsub_state
- * callback take care of sending the terminal NOTIFY request instead.
+ * In either case we push serialized_pubsub_on_refresh_timeout to send an
+ * appropriate NOTIFY request.
*/
static void pubsub_on_rx_refresh(pjsip_evsub *evsub, pjsip_rx_data *rdata,
int *p_st_code, pj_str_t **p_st_text, pjsip_hdr *res_hdr, pjsip_msg_body **p_body)
@@ -3413,18 +3451,24 @@ static void pubsub_on_rx_refresh(pjsip_evsub *evsub, pjsip_rx_data *rdata,
struct sip_subscription_tree *sub_tree;
sub_tree = pjsip_evsub_get_mod_data(evsub, pubsub_module.id);
- if (!sub_tree) {
+ if (!sub_tree || sub_tree->state != SIP_SUB_TREE_NORMAL) {
+ ast_debug(1, "Possible terminate race prevented %p %d\n", sub_tree, sub_tree ? sub_tree->state : -1 );
return;
}
/* PJSIP will set the evsub's state to terminated before calling into this function
* if the Expires value of the incoming SUBSCRIBE is 0.
*/
- if (pjsip_evsub_get_state(sub_tree->evsub) != PJSIP_EVSUB_STATE_TERMINATED) {
- if (ast_sip_push_task(sub_tree->serializer, serialized_pubsub_on_rx_refresh, ao2_bump(sub_tree))) {
- /* If we can't push the NOTIFY refreshing task...we'll just go with it. */
- ao2_ref(sub_tree, -1);
- }
+
+ if (pjsip_evsub_get_state(sub_tree->evsub) == PJSIP_EVSUB_STATE_TERMINATED) {
+ sub_tree->state = SIP_SUB_TREE_TERMINATE_PENDING;
+ }
+
+ if (ast_sip_push_task(sub_tree->serializer, serialized_pubsub_on_refresh_timeout, ao2_bump(sub_tree))) {
+ /* If we can't push the NOTIFY refreshing task...we'll just go with it. */
+ ast_log(LOG_ERROR, "Failed to push task to send NOTIFY.\n");
+ sub_tree->state = SIP_SUB_TREE_NORMAL;
+ ao2_ref(sub_tree, -1);
}
if (sub_tree->is_list) {
@@ -3435,9 +3479,9 @@ static void pubsub_on_rx_refresh(pjsip_evsub *evsub, pjsip_rx_data *rdata,
static void pubsub_on_rx_notify(pjsip_evsub *evsub, pjsip_rx_data *rdata, int *p_st_code,
pj_str_t **p_st_text, pjsip_hdr *res_hdr, pjsip_msg_body **p_body)
{
- struct ast_sip_subscription *sub = pjsip_evsub_get_mod_data(evsub, pubsub_module.id);
+ struct ast_sip_subscription *sub;
- if (!sub) {
+ if (!(sub = pjsip_evsub_get_mod_data(evsub, pubsub_module.id))) {
return;
}
@@ -3450,45 +3494,62 @@ static int serialized_pubsub_on_client_refresh(void *userdata)
struct sip_subscription_tree *sub_tree = userdata;
pjsip_tx_data *tdata;
+ if (!sub_tree->evsub) {
+ ao2_cleanup(sub_tree);
+ return 0;
+ }
+
if (pjsip_evsub_initiate(sub_tree->evsub, NULL, -1, &tdata) == PJ_SUCCESS) {
pjsip_evsub_send_request(sub_tree->evsub, tdata);
} else {
pjsip_evsub_terminate(sub_tree->evsub, PJ_TRUE);
}
+
ao2_cleanup(sub_tree);
return 0;
}
static void pubsub_on_client_refresh(pjsip_evsub *evsub)
{
- struct sip_subscription_tree *sub_tree = pjsip_evsub_get_mod_data(evsub, pubsub_module.id);
+ struct sip_subscription_tree *sub_tree;
+
+ if (!(sub_tree = pjsip_evsub_get_mod_data(evsub, pubsub_module.id))) {
+ return;
+ }
- ao2_ref(sub_tree, +1);
- ast_sip_push_task(sub_tree->serializer, serialized_pubsub_on_client_refresh, sub_tree);
+ if (ast_sip_push_task(sub_tree->serializer, serialized_pubsub_on_client_refresh, ao2_bump(sub_tree))) {
+ ao2_cleanup(sub_tree);
+ }
}
static void pubsub_on_server_timeout(pjsip_evsub *evsub)
{
+ struct sip_subscription_tree *sub_tree;
- struct sip_subscription_tree *sub_tree = pjsip_evsub_get_mod_data(evsub, pubsub_module.id);
- if (!sub_tree) {
- /* PJSIP does not terminate the server timeout timer when a SUBSCRIBE
- * with Expires: 0 arrives to end a subscription, nor does it terminate
- * this timer when we send a NOTIFY request in response to receiving such
- * a SUBSCRIBE. PJSIP does not stop the server timeout timer until the
- * NOTIFY transaction has finished (either through receiving a response
- * or through a transaction timeout).
- *
- * Therefore, it is possible that we can be told that a server timeout
- * occurred after we already thought that the subscription had been
- * terminated. In such a case, we will have already removed the sub_tree
- * from the evsub's mod_data array.
- */
+ /* PJSIP does not terminate the server timeout timer when a SUBSCRIBE
+ * with Expires: 0 arrives to end a subscription, nor does it terminate
+ * this timer when we send a NOTIFY request in response to receiving such
+ * a SUBSCRIBE. PJSIP does not stop the server timeout timer until the
+ * NOTIFY transaction has finished (either through receiving a response
+ * or through a transaction timeout).
+ *
+ * Therefore, it is possible that we can be told that a server timeout
+ * occurred after we already thought that the subscription had been
+ * terminated. In such a case, we will have already removed the sub_tree
+ * from the evsub's mod_data array.
+ */
+
+ sub_tree = pjsip_evsub_get_mod_data(evsub, pubsub_module.id);
+ if (!sub_tree || sub_tree->state != SIP_SUB_TREE_NORMAL) {
+ ast_debug(1, "Possible terminate race prevented %p %d\n", sub_tree, sub_tree ? sub_tree->state : -1 );
return;
}
- ao2_ref(sub_tree, +1);
- ast_sip_push_task(sub_tree->serializer, serialized_pubsub_on_server_timeout, sub_tree);
+ sub_tree->state = SIP_SUB_TREE_TERMINATE_PENDING;
+ if (ast_sip_push_task(sub_tree->serializer, serialized_pubsub_on_refresh_timeout, ao2_bump(sub_tree))) {
+ sub_tree->state = SIP_SUB_TREE_NORMAL;
+ ao2_cleanup(sub_tree);
+ }
}
static int ami_subscription_detail(struct sip_subscription_tree *sub_tree,
diff --git a/third-party/pjproject/configure.m4 b/third-party/pjproject/configure.m4
index 2cc18bfa8..67ac04d4d 100644
--- a/third-party/pjproject/configure.m4
+++ b/third-party/pjproject/configure.m4
@@ -44,4 +44,5 @@ AC_DEFUN([PJPROJECT_CONFIGURE],
PJPROJECT_SYMBOL_CHECK([PJ_SSL_CERT_LOAD_FROM_FILES2], [pj_ssl_cert_load_from_files2], [pjlib.h])
PJPROJECT_SYMBOL_CHECK([PJSIP_EXTERNAL_RESOLVER], [pjsip_endpt_set_ext_resolver], [pjsip.h])
AC_DEFINE([HAVE_PJSIP_TLS_TRANSPORT_PROTO], 1, [Define if your system has PJSIP_TLS_TRANSPORT_PROTO])
+ AC_DEFINE([HAVE_PJSIP_EVSUB_GRP_LOCK], 1, [Define if your system has PJSIP_EVSUB_GRP_LOCK])
])
diff --git a/third-party/pjproject/patches/0001-evsub-Add-APIs-to-add-decrement-an-event-subscriptio.patch b/third-party/pjproject/patches/0001-evsub-Add-APIs-to-add-decrement-an-event-subscriptio.patch
new file mode 100644
index 000000000..d2a47c6c5
--- /dev/null
+++ b/third-party/pjproject/patches/0001-evsub-Add-APIs-to-add-decrement-an-event-subscriptio.patch
@@ -0,0 +1,73 @@
+From a5030c9b33b2c936879fbacb1d2ea5edc2979181 Mon Sep 17 00:00:00 2001
+From: George Joseph <gjoseph@digium.com>
+Date: Sat, 18 Jun 2016 10:14:34 -0600
+Subject: [PATCH] evsub: Add APIs to add/decrement an event subscription's
+ group lock
+
+These APIs can be used to ensure that the evsub isn't destroyed before
+an application is finished using it.
+---
+ pjsip/include/pjsip-simple/evsub.h | 20 ++++++++++++++++++++
+ pjsip/src/pjsip-simple/evsub.c | 14 ++++++++++++++
+ 2 files changed, 34 insertions(+)
+
+diff --git a/pjsip/include/pjsip-simple/evsub.h b/pjsip/include/pjsip-simple/evsub.h
+index 2dc4d69..31f85f8 100644
+--- a/pjsip/include/pjsip-simple/evsub.h
++++ b/pjsip/include/pjsip-simple/evsub.h
+@@ -490,6 +490,26 @@ PJ_DECL(void) pjsip_evsub_set_mod_data( pjsip_evsub *sub, unsigned mod_id,
+ PJ_DECL(void*) pjsip_evsub_get_mod_data( pjsip_evsub *sub, unsigned mod_id );
+
+
++/**
++ * Increment the event subscription's group lock.
++ *
++ * @param sub The server subscription instance.
++ *
++ * @return PJ_SUCCESS on success.
++ */
++PJ_DEF(pj_status_t) pjsip_evsub_add_ref(pjsip_evsub *sub);
++
++
++/**
++ * Decrement the event subscription's group lock.
++ *
++ * @param sub The server subscription instance.
++ *
++ * @return PJ_SUCCESS on success.
++ */
++PJ_DEF(pj_status_t) pjsip_evsub_dec_ref(pjsip_evsub *sub);
++
++
+
+ PJ_END_DECL
+
+diff --git a/pjsip/src/pjsip-simple/evsub.c b/pjsip/src/pjsip-simple/evsub.c
+index 7cd8859..68a9564 100644
+--- a/pjsip/src/pjsip-simple/evsub.c
++++ b/pjsip/src/pjsip-simple/evsub.c
+@@ -831,7 +831,21 @@ static pj_status_t evsub_create( pjsip_dialog *dlg,
+ return PJ_SUCCESS;
+ }
+
++/*
++ * Increment the event subscription's group lock.
++ */
++PJ_DEF(pj_status_t) pjsip_evsub_add_ref(pjsip_evsub *sub)
++{
++ return pj_grp_lock_add_ref(sub->grp_lock);
++}
+
++/*
++ * Decrement the event subscription's group lock.
++ */
++PJ_DEF(pj_status_t) pjsip_evsub_dec_ref(pjsip_evsub *sub)
++{
++ return pj_grp_lock_dec_ref(sub->grp_lock);
++}
+
+ /*
+ * Create client subscription session.
+--
+2.5.5
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-23 02:55:58 +0000