pjproject_bundled: Update for pjproject 2.6

 * Removed all 2.5.5 functional patches.
 * Updated usages of pj_release_pool to be "safe".
 * Updated configure options to disable webrtc.
 * Updated config_site.h to disable webrtc in pjmedia.
 * Added Richard Mudgett's recent resolver patches.

Change-Id: Ib400cc4dfca68b3d07ce14d314e829bfddc252c7

16 files changed, 34 insertions, 931 deletions

diff --git a/third-party/pjproject/Makefile.rules b/third-party/pjproject/Makefile.rules
index ae4b6a5f9..e8eb46643 100644
--- a/third-party/pjproject/Makefile.rules
+++ b/third-party/pjproject/Makefile.rules
@@ -12,7 +12,6 @@ PJPROJECT_CONFIG_OPTS = --prefix=/opt/pjproject \
 	--disable-g722-codec \
 	--disable-g7221-codec \
 	--disable-opencore-amr \
-	--disable-webrtc \
 	--disable-silk \
 	--disable-opus \
 	--disable-video \
@@ -26,7 +25,8 @@ PJPROJECT_CONFIG_OPTS = --prefix=/opt/pjproject \
 	--disable-openh264 \
 	--disable-ipp \
 	--without-external-pa \
-	--without-external-srtp
+	--without-external-srtp \
+	--without-external-webrtc
 
 ifeq ($(findstring TEST_FRAMEWORK,$(MENUSELECT_CFLAGS)),)
     PJPROJECT_CONFIG_OPTS += --disable-resample --disable-g711-codec
diff --git a/third-party/pjproject/patches/0000-remove-third-party.patch b/third-party/pjproject/patches/0000-remove-third-party.patch
index 2e3bb5f9f..81c53a0c3 100644
--- a/third-party/pjproject/patches/0000-remove-third-party.patch
+++ b/third-party/pjproject/patches/0000-remove-third-party.patch
@@ -1,21 +1,14 @@
 diff --git a/build.mak.in b/build.mak.in
-index 802211c..25fd05e 100644
+index eb28663..83024ef 100644
 --- a/build.mak.in
 +++ b/build.mak.in
-@@ -1,4 +1,3 @@
+@@ -1,6 +1,5 @@
 -export PJDIR := @ac_pjdir@
  include $(PJDIR)/version.mak
  export PJ_DIR := $(PJDIR)
  
-@@ -9,7 +8,7 @@ export HOST_NAME := unix
- export CC_NAME := gcc
- export TARGET_NAME := @target@
- export CROSS_COMPILE := @ac_cross_compile@
--export LINUX_POLL := @ac_linux_poll@ 
-+export LINUX_POLL := @ac_linux_poll@
- export SHLIB_SUFFIX := @ac_shlib_suffix@
- 
- export prefix := @prefix@
+ # @configure_input@
+ export MACHINE_NAME := auto
 @@ -28,19 +27,6 @@ export APP_THIRD_PARTY_EXT :=
  export APP_THIRD_PARTY_LIBS :=
  export APP_THIRD_PARTY_LIB_FILES :=
@@ -36,7 +29,7 @@ index 802211c..25fd05e 100644
  ifeq (@ac_pjmedia_resample@,libresample)
  APP_THIRD_PARTY_LIB_FILES += $(PJ_DIR)/third_party/lib/libresample-$(LIB_SUFFIX)
  ifeq ($(PJ_SHARED_LIBRARIES),)
-@@ -57,85 +43,6 @@ APP_THIRD_PARTY_LIB_FILES += $(PJ_DIR)/third_party/lib/libresample.$(SHLIB_SUFFI
+@@ -57,99 +43,6 @@ APP_THIRD_PARTY_LIB_FILES += $(PJ_DIR)/third_party/lib/libresample.$(SHLIB_SUFFI
  endif
  endif
  
@@ -118,25 +111,21 @@ index 802211c..25fd05e 100644
 -endif
 -endif
 -
+-ifneq (@ac_no_webrtc@,1)
+-ifeq (@ac_external_webrtc@,1)
+-APP_THIRD_PARTY_EXT += -lwebrtc
+-else
+-APP_THIRD_PARTY_LIB_FILES += $(PJ_DIR)/third_party/lib/libwebrtc-$(LIB_SUFFIX)
+-ifeq ($(PJ_SHARED_LIBRARIES),)
+-APP_THIRD_PARTY_LIBS += -lwebrtc-$(TARGET_NAME)
+-else
+-APP_THIRD_PARTY_LIBS += -lwebrtc
+-APP_THIRD_PARTY_LIB_FILES += $(PJ_DIR)/third_party/lib/libwebrtc.$(SHLIB_SUFFIX).$(PJ_VERSION_MAJOR) $(PJ_DIR)/third_party/lib/libwebrtc.$(SHLIB_SUFFIX)
+-endif
+-endif
+-endif
+-
 -
  # Additional flags
  @ac_build_mak_vars@
  
-@@ -149,7 +56,7 @@ SDL_CFLAGS = @ac_sdl_cflags@
- SDL_LDFLAGS = @ac_sdl_ldflags@
- 
- # FFMPEG flags
--FFMPEG_CFLAGS = @ac_ffmpeg_cflags@ 
-+FFMPEG_CFLAGS = @ac_ffmpeg_cflags@
- FFMPEG_LDFLAGS =  @ac_ffmpeg_ldflags@
- 
- # Video4Linux2
-@@ -157,7 +64,7 @@ V4L2_CFLAGS = @ac_v4l2_cflags@
- V4L2_LDFLAGS = @ac_v4l2_ldflags@
- 
- # OPENH264 flags
--OPENH264_CFLAGS = @ac_openh264_cflags@ 
-+OPENH264_CFLAGS = @ac_openh264_cflags@
- OPENH264_LDFLAGS =  @ac_openh264_ldflags@
- 
- # QT
diff --git a/third-party/pjproject/patches/0001-r5397-pjsip_generic_array_max_count.patch b/third-party/pjproject/patches/0001-r5397-pjsip_generic_array_max_count.patch
deleted file mode 100644
index 3cc328afe..000000000
--- a/third-party/pjproject/patches/0001-r5397-pjsip_generic_array_max_count.patch
+++ /dev/null
@@ -1,58 +0,0 @@
-This patch updates array limit checks and docs
-in pjsip_evsub_register_pkg() and pjsip_endpt_add_capability().
-
-Index: pjsip/include/pjsip/sip_endpoint.h
-===================================================================
---- a/pjsip/include/pjsip/sip_endpoint.h	(revision 5396)
-+++ b/pjsip/include/pjsip/sip_endpoint.h	(revision 5397)
-@@ -583,7 +583,8 @@
-  * @param hname	    If htype specifies PJSIP_H_OTHER, then the header name
-  *		    must be supplied in this argument. Otherwise the value
-  *		    must be set to NULL.
-- * @param count	    The number of tags in the array.
-+ * @param count	    The number of tags in the array. The value must not
-+ *		    be greater than PJSIP_GENERIC_ARRAY_MAX_COUNT.
-  * @param tags	    Array of tags describing the capabilities or extensions
-  *		    to be added to the appropriate header.
-  *
-Index: pjsip/include/pjsip-simple/evsub.h
-===================================================================
---- a/pjsip/include/pjsip-simple/evsub.h	(revision 5396)
-+++ b/pjsip/include/pjsip-simple/evsub.h	(revision 5397)
-@@ -246,7 +246,8 @@
-  *			registered.
-  * @param event_name	Event package identification.
-  * @param expires	Default subscription expiration time, in seconds.
-- * @param accept_cnt	Number of strings in Accept array.
-+ * @param accept_cnt	Number of strings in Accept array. The value must
-+ *			not be greater than PJSIP_GENERIC_ARRAY_MAX_COUNT.
-  * @param accept	Array of Accept value.
-  *
-  * @return		PJ_SUCCESS on success.
-Index: pjsip/src/pjsip/sip_endpoint.c
-===================================================================
---- a/pjsip/src/pjsip/sip_endpoint.c	(revision 5396)
-+++ b/pjsip/src/pjsip/sip_endpoint.c	(revision 5397)
-@@ -371,6 +371,7 @@
- 
-     /* Check arguments. */
-     PJ_ASSERT_RETURN(endpt!=NULL && count>0 && tags, PJ_EINVAL);
-+    PJ_ASSERT_RETURN(count <= PJSIP_GENERIC_ARRAY_MAX_COUNT, PJ_ETOOMANY);
-     PJ_ASSERT_RETURN(htype==PJSIP_H_ACCEPT || 
- 		     htype==PJSIP_H_ALLOW ||
- 		     htype==PJSIP_H_SUPPORTED,
-Index: pjsip/src/pjsip-simple/evsub.c
-===================================================================
---- a/pjsip/src/pjsip-simple/evsub.c	(revision 5396)
-+++ b/pjsip/src/pjsip-simple/evsub.c	(revision 5397)
-@@ -412,7 +412,9 @@
-     unsigned i;
- 
-     PJ_ASSERT_RETURN(pkg_mod && event_name, PJ_EINVAL);
--    PJ_ASSERT_RETURN(accept_cnt < PJ_ARRAY_SIZE(pkg->pkg_accept->values), 
-+    
-+    /* Make sure accept_cnt < PJ_ARRAY_SIZE(pkg->pkg_accept->values) */
-+    PJ_ASSERT_RETURN(accept_cnt <= PJSIP_GENERIC_ARRAY_MAX_COUNT, 
- 		     PJ_ETOOMANY);
- 
-     /* Make sure evsub module has been initialized */
diff --git a/third-party/pjproject/patches/0001-r5400-pjsip_tx_data_dec_ref.patch b/third-party/pjproject/patches/0001-r5400-pjsip_tx_data_dec_ref.patch
deleted file mode 100644
index b5c11db45..000000000
--- a/third-party/pjproject/patches/0001-r5400-pjsip_tx_data_dec_ref.patch
+++ /dev/null
@@ -1,24 +0,0 @@
-This patch fixes the issue in pjsip_tx_data_dec_ref()
-when tx_data_destroy can be called more than once,
-and checks if invalid value (e.g. NULL) is passed to.
-
-Index: pjsip/src/pjsip/sip_transport.c
-===================================================================
---- a/pjsip/src/pjsip/sip_transport.c	(revision 5399)
-+++ b/pjsip/src/pjsip/sip_transport.c	(revision 5400)
-@@ -491,8 +491,13 @@
-  */
- PJ_DEF(pj_status_t) pjsip_tx_data_dec_ref( pjsip_tx_data *tdata )
- {
--    pj_assert( pj_atomic_get(tdata->ref_cnt) > 0);
--    if (pj_atomic_dec_and_get(tdata->ref_cnt) <= 0) {
-+    pj_atomic_value_t ref_cnt;
-+    
-+    PJ_ASSERT_RETURN(tdata && tdata->ref_cnt, PJ_EINVAL);
-+
-+    ref_cnt = pj_atomic_dec_and_get(tdata->ref_cnt);
-+    pj_assert( ref_cnt >= 0);
-+    if (ref_cnt == 0) {
- 	tx_data_destroy(tdata);
- 	return PJSIP_EBUFDESTROYED;
-     } else {
diff --git a/third-party/pjproject/patches/0002-Fix-1946-Avoid-deinitialization-of-uninitialized-cli.patch b/third-party/pjproject/patches/0002-Fix-1946-Avoid-deinitialization-of-uninitialized-cli.patch
deleted file mode 100644
index c4288a389..000000000
--- a/third-party/pjproject/patches/0002-Fix-1946-Avoid-deinitialization-of-uninitialized-cli.patch
+++ /dev/null
@@ -1,56 +0,0 @@
-From 33fd755e819dc85a96718abc0ae26a9b46f14800 Mon Sep 17 00:00:00 2001
-From: nanang <nanang@localhost>
-Date: Thu, 28 Jul 2016 08:21:45 +0000
-Subject: [PATCH 2/3] Fix #1946: Avoid deinitialization of uninitialized client
- auth session.
-
----
- pjsip/src/pjsip/sip_dialog.c | 18 ++++++------------
- 1 file changed, 6 insertions(+), 12 deletions(-)
-
-diff --git a/pjsip/src/pjsip/sip_dialog.c b/pjsip/src/pjsip/sip_dialog.c
-index f03885d..421ddc4 100644
---- a/pjsip/src/pjsip/sip_dialog.c
-+++ b/pjsip/src/pjsip/sip_dialog.c
-@@ -92,6 +92,12 @@ static pj_status_t create_dialog( pjsip_user_agent *ua,
-     pj_list_init(&dlg->inv_hdr);
-     pj_list_init(&dlg->rem_cap_hdr);
- 
-+    /* Init client authentication session. */
-+    status = pjsip_auth_clt_init(&dlg->auth_sess, dlg->endpt,
-+				 dlg->pool, 0);
-+    if (status != PJ_SUCCESS)
-+	goto on_error;
-+
-     status = pj_mutex_create_recursive(pool, dlg->obj_name, &dlg->mutex_);
-     if (status != PJ_SUCCESS)
- 	goto on_error;
-@@ -283,12 +289,6 @@ PJ_DEF(pj_status_t) pjsip_dlg_create_uac( pjsip_user_agent *ua,
-     /* Initial route set is empty. */
-     pj_list_init(&dlg->route_set);
- 
--    /* Init client authentication session. */
--    status = pjsip_auth_clt_init(&dlg->auth_sess, dlg->endpt,
--				 dlg->pool, 0);
--    if (status != PJ_SUCCESS)
--	goto on_error;
--
-     /* Register this dialog to user agent. */
-     status = pjsip_ua_register_dlg( ua, dlg );
-     if (status != PJ_SUCCESS)
-@@ -506,12 +506,6 @@ pj_status_t create_uas_dialog( pjsip_user_agent *ua,
-     }
-     dlg->route_set_frozen = PJ_TRUE;
- 
--    /* Init client authentication session. */
--    status = pjsip_auth_clt_init(&dlg->auth_sess, dlg->endpt,
--				 dlg->pool, 0);
--    if (status != PJ_SUCCESS)
--	goto on_error;
--
-     /* Increment the dialog's lock since tsx may cause the dialog to be
-      * destroyed prematurely (such as in case of transport error).
-      */
--- 
-2.7.4
-
diff --git a/third-party/pjproject/patches/0002-r5435-add-pjsip_inv_session-ref_cnt.patch b/third-party/pjproject/patches/0002-r5435-add-pjsip_inv_session-ref_cnt.patch
deleted file mode 100644
index 12ae6a028..000000000
--- a/third-party/pjproject/patches/0002-r5435-add-pjsip_inv_session-ref_cnt.patch
+++ /dev/null
@@ -1,212 +0,0 @@
-When a transport error occured on an INVITE session
-the stack calls on_tsx_state_changed with new state
-PJSIP_INV_STATE_DISCONNECTED and immediately destroys
-the INVITE session.
-At the same time this INVITE session could being processed
-on another thread. This thread could use the session's
-memory pools which were already freed, so we get segfault.
-
-This patch adds a reference counter and new functions:
-pjsip_inv_add_ref and pjsip_inv_dec_ref.
-The INVITE session is destroyed only when the reference
-counter has reached zero.
-
-To avoid race condition an application should call
-pjsip_inv_add_ref/pjsip_inv_dec_ref.
-
-Index: pjsip/include/pjsip-ua/sip_inv.h
-===================================================================
---- a/pjsip/include/pjsip-ua/sip_inv.h	(revision 5434)
-+++ b/pjsip/include/pjsip-ua/sip_inv.h	(revision 5435)
-@@ -383,6 +383,11 @@
-  * Other applications that want to use these pools must understand
-  * that the flip-flop pool's lifetimes are synchronized to the
-  * SDP offer-answer negotiation.
-+ *
-+ * The lifetime of this session is controlled by the reference counter in this
-+ * structure, which is manipulated by calling #pjsip_inv_add_ref and
-+ * #pjsip_inv_dec_ref. When the reference counter has reached zero, then
-+ * this session will be destroyed.
-  */
- struct pjsip_inv_session
- {
-@@ -412,6 +417,7 @@
-     struct pjsip_timer	*timer;			    /**< Session Timers.    */
-     pj_bool_t		 following_fork;	    /**< Internal, following
- 							 forked media?	    */
-+    pj_atomic_t		*ref_cnt;		    /**< Reference counter. */
- };
- 
- 
-@@ -631,6 +637,30 @@
- 
- 
- /**
-+ * Add reference counter to the INVITE session. The reference counter controls
-+ * the life time of the session, ie. when the counter reaches zero, then it 
-+ * will be destroyed.
-+ *
-+ * @param inv       The INVITE session.
-+ * @return          PJ_SUCCESS if the INVITE session reference counter
-+ *                  was increased.
-+ */
-+PJ_DECL(pj_status_t) pjsip_inv_add_ref( pjsip_inv_session *inv );
-+
-+/**
-+ * Decrement reference counter of the INVITE session.
-+ * When the session is no longer used, it will be destroyed and
-+ * caller is informed with PJ_EGONE return status.
-+ *
-+ * @param inv       The INVITE session.
-+ * @return          PJ_SUCCESS if the INVITE session reference counter
-+ *                  was decreased. A status PJ_EGONE will be returned to 
-+ *                  inform that session is destroyed.
-+ */
-+PJ_DECL(pj_status_t) pjsip_inv_dec_ref( pjsip_inv_session *inv );
-+
-+
-+/**
-  * Forcefully terminate and destroy INVITE session, regardless of
-  * the state of the session. Note that this function should only be used
-  * when there is failure in the INVITE session creation. After the
-Index: pjsip/src/pjsip-ua/sip_inv.c
-===================================================================
---- a/pjsip/src/pjsip-ua/sip_inv.c	(revision 5434)
-+++ b/pjsip/src/pjsip-ua/sip_inv.c	(revision 5435)
-@@ -195,6 +195,65 @@
- }
- 
- /*
-+ * Add reference to INVITE session.
-+ */
-+PJ_DEF(pj_status_t) pjsip_inv_add_ref( pjsip_inv_session *inv )
-+{
-+    PJ_ASSERT_RETURN(inv && inv->ref_cnt, PJ_EINVAL);
-+
-+    pj_atomic_inc(inv->ref_cnt);
-+
-+    return PJ_SUCCESS;
-+}
-+
-+static void inv_session_destroy(pjsip_inv_session *inv)
-+{
-+    if (inv->last_ack) {
-+	pjsip_tx_data_dec_ref(inv->last_ack);
-+	inv->last_ack = NULL;
-+    }
-+    if (inv->invite_req) {
-+	pjsip_tx_data_dec_ref(inv->invite_req);
-+	inv->invite_req = NULL;
-+    }
-+    if (inv->pending_bye) {
-+	pjsip_tx_data_dec_ref(inv->pending_bye);
-+	inv->pending_bye = NULL;
-+    }
-+    pjsip_100rel_end_session(inv);
-+    pjsip_timer_end_session(inv);
-+    pjsip_dlg_dec_session(inv->dlg, &mod_inv.mod);
-+
-+    /* Release the flip-flop pools */
-+    pj_pool_release(inv->pool_prov);
-+    inv->pool_prov = NULL;
-+    pj_pool_release(inv->pool_active);
-+    inv->pool_active = NULL;
-+
-+    pj_atomic_destroy(inv->ref_cnt);
-+    inv->ref_cnt = NULL;
-+}
-+
-+/*
-+ * Decrease INVITE session reference, destroy it when the reference count
-+ * reaches zero.
-+ */
-+PJ_DEF(pj_status_t) pjsip_inv_dec_ref( pjsip_inv_session *inv )
-+{
-+    pj_atomic_value_t ref_cnt;
-+
-+    PJ_ASSERT_RETURN(inv && inv->ref_cnt, PJ_EINVAL);
-+
-+    ref_cnt = pj_atomic_dec_and_get(inv->ref_cnt);
-+    pj_assert( ref_cnt >= 0);
-+    if (ref_cnt == 0) {
-+        inv_session_destroy(inv);
-+        return PJ_EGONE;
-+    } 
-+    return PJ_SUCCESS;    
-+}
-+
-+/*
-  * Set session state.
-  */
- static void inv_set_state(pjsip_inv_session *inv, pjsip_inv_state state,
-@@ -261,27 +320,7 @@
-     if (inv->state == PJSIP_INV_STATE_DISCONNECTED &&
- 	prev_state != PJSIP_INV_STATE_DISCONNECTED) 
-     {
--	if (inv->last_ack) {
--	    pjsip_tx_data_dec_ref(inv->last_ack);
--	    inv->last_ack = NULL;
--	}
--	if (inv->invite_req) {
--	    pjsip_tx_data_dec_ref(inv->invite_req);
--	    inv->invite_req = NULL;
--	}
--	if (inv->pending_bye) {
--	    pjsip_tx_data_dec_ref(inv->pending_bye);
--	    inv->pending_bye = NULL;
--	}
--	pjsip_100rel_end_session(inv);
--	pjsip_timer_end_session(inv);
--	pjsip_dlg_dec_session(inv->dlg, &mod_inv.mod);
--
--	/* Release the flip-flop pools */
--	pj_pool_release(inv->pool_prov);
--	inv->pool_prov = NULL;
--	pj_pool_release(inv->pool_active);
--	inv->pool_active = NULL;
-+	pjsip_inv_dec_ref(inv);
-     }
- }
- 
-@@ -838,6 +877,12 @@
-     inv = PJ_POOL_ZALLOC_T(dlg->pool, pjsip_inv_session);
-     pj_assert(inv != NULL);
- 
-+    status = pj_atomic_create(dlg->pool, 0, &inv->ref_cnt);
-+    if (status != PJ_SUCCESS) {
-+	pjsip_dlg_dec_lock(dlg);
-+	return status;
-+    }
-+
-     inv->pool = dlg->pool;
-     inv->role = PJSIP_ROLE_UAC;
-     inv->state = PJSIP_INV_STATE_NULL;
-@@ -881,6 +926,7 @@
-     pjsip_100rel_attach(inv);
- 
-     /* Done */
-+    pjsip_inv_add_ref(inv);
-     *p_inv = inv;
- 
-     pjsip_dlg_dec_lock(dlg);
-@@ -1471,6 +1517,12 @@
-     inv = PJ_POOL_ZALLOC_T(dlg->pool, pjsip_inv_session);
-     pj_assert(inv != NULL);
- 
-+    status = pj_atomic_create(dlg->pool, 0, &inv->ref_cnt);
-+    if (status != PJ_SUCCESS) {
-+	pjsip_dlg_dec_lock(dlg);
-+	return status;
-+    }
-+
-     inv->pool = dlg->pool;
-     inv->role = PJSIP_ROLE_UAS;
-     inv->state = PJSIP_INV_STATE_NULL;
-@@ -1540,6 +1592,7 @@
-     }
- 
-     /* Done */
-+    pjsip_inv_add_ref(inv);
-     pjsip_dlg_dec_lock(dlg);
-     *p_inv = inv;
- 
diff --git a/third-party/pjproject/patches/0003-r5403-pjsip_IPV6_V6ONLY.patch b/third-party/pjproject/patches/0003-r5403-pjsip_IPV6_V6ONLY.patch
deleted file mode 100644
index b324b53f4..000000000
--- a/third-party/pjproject/patches/0003-r5403-pjsip_IPV6_V6ONLY.patch
+++ /dev/null
@@ -1,13 +0,0 @@
---- a/pjlib/src/pj/sock_bsd.c
-+++ b/pjlib/src/pj/sock_bsd.c
-@@ -539,6 +539,10 @@
- 	    pj_sock_setsockopt(*sock, pj_SOL_SOCKET(), pj_SO_NOSIGPIPE(),
- 			       &val, sizeof(val));
- 	}
-+	if (af != PJ_AF_INET) { /* Linux Kernel 2.4.21; June 2003 */
-+	    pj_sock_setsockopt(*sock, PJ_SOL_IPV6, IPV6_V6ONLY,
-+			       &val, sizeof(val));
-+	}
- #if defined(PJ_IPHONE_OS_HAS_MULTITASKING_SUPPORT) && \
-     PJ_IPHONE_OS_HAS_MULTITASKING_SUPPORT!=0
- 	if (type == pj_SOCK_DGRAM()) {
diff --git a/third-party/pjproject/patches/0004-resolver.c-Prevent-SERVFAIL-from-marking-name-server.patch b/third-party/pjproject/patches/0004-resolver.c-Prevent-SERVFAIL-from-marking-name-server.patch
deleted file mode 100644
index 55f3d2d15..000000000
--- a/third-party/pjproject/patches/0004-resolver.c-Prevent-SERVFAIL-from-marking-name-server.patch
+++ /dev/null
@@ -1,48 +0,0 @@
-From a5efddbe9151e9ad99279e59566c86f8bc27d3a9 Mon Sep 17 00:00:00 2001
-From: George Joseph <gjoseph@digium.com>
-Date: Wed, 7 Sep 2016 13:10:57 -0600
-Subject: [PATCH] resolver.c:  Prevent SERVFAIL from marking name server bad
-
-A name server that returns "Server Failure" is indicating only that
-the server couldn't process that particular request.  We should NOT
-assume that the name server is incapable of serving other requests.
-
-Here's the scenario we've been encountering...
-
-* 2 local name servers configured in resolv.conf.
-* An OPTIONS request causes a request for A and AAAA records to go out
-  to both nameservers.
-* The A responses both come back successfully resolved.
-* Because of an issue at some upstream nameserver, the AAAA responses
-  for that particular query come back as "SERVFAIL" from both local
-  name servers.
-* Both local servers are marked as bad and no further queries can be
-  sent until the 60 second ttl expires.  Only previously cached results
-  can be used.
-* In this case, 60 seconds is just enough time for another OPTIONS
-  request to go out to the same host so the cycle repeats.
-
-We could set the bad ttl really low but that also affects REFUSED and
-NOTAUTH which probably DO signal a real server issue.  Besides, even
-a really low bad ttl would be an issue on a pbx.
----
- pjlib-util/src/pjlib-util/resolver.c | 3 +--
- 1 file changed, 1 insertion(+), 2 deletions(-)
-
-diff --git a/pjlib-util/src/pjlib-util/resolver.c b/pjlib-util/src/pjlib-util/resolver.c
-index d277e4f..540f88f 100644
---- a/pjlib-util/src/pjlib-util/resolver.c
-+++ b/pjlib-util/src/pjlib-util/resolver.c
-@@ -1384,8 +1384,7 @@ static void report_nameserver_status(pj_dns_resolver *resolver,
- 	q_id = (pj_uint32_t)-1;
-     }
- 
--    if (!pkt || rcode == PJ_DNS_RCODE_SERVFAIL ||
--	        rcode == PJ_DNS_RCODE_REFUSED ||
-+    if (!pkt || rcode == PJ_DNS_RCODE_REFUSED ||
- 	        rcode == PJ_DNS_RCODE_NOTAUTH) 
-     {
- 	is_good = PJ_FALSE;
--- 
-2.7.4
-
diff --git a/third-party/pjproject/patches/0005-Re-1969-Fix-crash-on-using-an-already-destroyed-SSL-.patch b/third-party/pjproject/patches/0005-Re-1969-Fix-crash-on-using-an-already-destroyed-SSL-.patch
deleted file mode 100644
index 551e61ab6..000000000
--- a/third-party/pjproject/patches/0005-Re-1969-Fix-crash-on-using-an-already-destroyed-SSL-.patch
+++ /dev/null
@@ -1,164 +0,0 @@
-From 9e67e0d5c3fdc747530a956038b374fca4748b76 Mon Sep 17 00:00:00 2001
-From: riza <riza@localhost>
-Date: Thu, 13 Oct 2016 09:02:50 +0000
-Subject: [PATCH 1/4] Re #1969: Fix crash on using an already destroyed SSL
- socket.
-
----
- pjlib/src/pj/ssl_sock_ossl.c | 66 ++++++++++++++++++++++++++++----------------
- 1 file changed, 42 insertions(+), 24 deletions(-)
-
-diff --git a/pjlib/src/pj/ssl_sock_ossl.c b/pjlib/src/pj/ssl_sock_ossl.c
-index fa0db2d..ceab67a 100644
---- a/pjlib/src/pj/ssl_sock_ossl.c
-+++ b/pjlib/src/pj/ssl_sock_ossl.c
-@@ -822,7 +822,10 @@ static void close_sockets(pj_ssl_sock_t *ssock)
-     pj_lock_acquire(ssock->write_mutex);
-     asock = ssock->asock;
-     if (asock) {
--        ssock->asock = NULL;
-+        // Don't set ssock->asock to NULL, as it may trigger assertion in
-+        // send operation. This should be safe as active socket will simply
-+        // return PJ_EINVALIDOP on any operation if it is already closed.
-+        //ssock->asock = NULL;
-         ssock->sock = PJ_INVALID_SOCKET;
-     }
-     sock = ssock->sock;
-@@ -841,9 +844,9 @@ static void close_sockets(pj_ssl_sock_t *ssock)
- /* Reset SSL socket state */
- static void reset_ssl_sock_state(pj_ssl_sock_t *ssock)
- {
-+    pj_lock_acquire(ssock->write_mutex);
-     ssock->ssl_state = SSL_STATE_NULL;
--
--    destroy_ssl(ssock);
-+    pj_lock_release(ssock->write_mutex);
- 
-     close_sockets(ssock);
- 
-@@ -1612,6 +1615,21 @@ static pj_status_t do_handshake(pj_ssl_sock_t *ssock)
-     return PJ_EPENDING;
- }
- 
-+static void ssl_on_destroy(void *arg)
-+{
-+    pj_pool_t *pool = NULL;
-+    pj_ssl_sock_t *ssock = (pj_ssl_sock_t*)arg;
-+
-+    destroy_ssl(ssock);
-+
-+    pj_lock_destroy(ssock->write_mutex);
-+
-+    pool = ssock->pool;
-+    ssock->pool = NULL;
-+    if (pool)
-+	pj_pool_release(pool);
-+}
-+
- 
- /*
-  *******************************************************************
-@@ -1830,7 +1848,7 @@ static pj_bool_t asock_on_accept_complete (pj_activesock_t *asock,
- 
-     /* Create new SSL socket instance */
-     status = pj_ssl_sock_create(ssock_parent->pool,
--    				&ssock_parent->newsock_param, &ssock);
-+				&ssock_parent->newsock_param, &ssock);
-     if (status != PJ_SUCCESS)
- 	goto on_return;
- 
-@@ -1906,12 +1924,10 @@ static pj_bool_t asock_on_accept_complete (pj_activesock_t *asock,
- 	if (status != PJ_SUCCESS)
- 	    goto on_return;
- 
--	/* Temporarily add ref the group lock until active socket creation,
--	 * to make sure that group lock is destroyed if the active socket
--	 * creation fails.
--	 */
- 	pj_grp_lock_add_ref(glock);
- 	asock_cfg.grp_lock = ssock->param.grp_lock = glock;
-+	pj_grp_lock_add_handler(ssock->param.grp_lock, ssock->pool, ssock,
-+				ssl_on_destroy);
-     }
- 
-     pj_bzero(&asock_cb, sizeof(asock_cb));
-@@ -1927,11 +1943,6 @@ static pj_bool_t asock_on_accept_complete (pj_activesock_t *asock,
- 				  ssock,
- 				  &ssock->asock);
- 
--    /* This will destroy the group lock if active socket creation fails */
--    if (asock_cfg.grp_lock) {
--	pj_grp_lock_dec_ref(asock_cfg.grp_lock);
--    }
--
-     if (status != PJ_SUCCESS)
- 	goto on_return;
- 
-@@ -2251,17 +2262,26 @@ PJ_DEF(pj_status_t) pj_ssl_sock_create (pj_pool_t *pool,
-     /* Create secure socket mutex */
-     status = pj_lock_create_recursive_mutex(pool, pool->obj_name,
- 					    &ssock->write_mutex);
--    if (status != PJ_SUCCESS)
-+    if (status != PJ_SUCCESS) {
-+	pj_pool_release(pool);
- 	return status;
-+    }
- 
-     /* Init secure socket param */
-     pj_ssl_sock_param_copy(pool, &ssock->param, param);
-+
-+    if (ssock->param.grp_lock) {
-+	pj_grp_lock_add_ref(ssock->param.grp_lock);
-+	pj_grp_lock_add_handler(ssock->param.grp_lock, pool, ssock,
-+				ssl_on_destroy);
-+    }
-+
-     ssock->param.read_buffer_size = ((ssock->param.read_buffer_size+7)>>3)<<3;
-     if (!ssock->param.timer_heap) {
- 	PJ_LOG(3,(ssock->pool->obj_name, "Warning: timer heap is not "
- 		  "available. It is recommended to supply one to avoid "
--		  "a race condition if more than one worker threads "
--		  "are used."));
-+	          "a race condition if more than one worker threads "
-+	          "are used."));
-     }
- 
-     /* Finally */
-@@ -2277,8 +2297,6 @@ PJ_DEF(pj_status_t) pj_ssl_sock_create (pj_pool_t *pool,
-  */
- PJ_DEF(pj_status_t) pj_ssl_sock_close(pj_ssl_sock_t *ssock)
- {
--    pj_pool_t *pool;
--
-     PJ_ASSERT_RETURN(ssock, PJ_EINVAL);
- 
-     if (!ssock->pool)
-@@ -2290,12 +2308,11 @@ PJ_DEF(pj_status_t) pj_ssl_sock_close(pj_ssl_sock_t *ssock)
-     }
- 
-     reset_ssl_sock_state(ssock);
--    pj_lock_destroy(ssock->write_mutex);
--    
--    pool = ssock->pool;
--    ssock->pool = NULL;
--    if (pool)
--	pj_pool_release(pool);
-+    if (ssock->param.grp_lock) {
-+	pj_grp_lock_dec_ref(ssock->param.grp_lock);
-+    } else {
-+	ssl_on_destroy(ssock);
-+    }
- 
-     return PJ_SUCCESS;
- }
-@@ -2782,6 +2799,7 @@ pj_ssl_sock_start_accept2(pj_ssl_sock_t *ssock,
- 
-     /* Start accepting */
-     pj_ssl_sock_param_copy(pool, &ssock->newsock_param, newsock_param);
-+    ssock->newsock_param.grp_lock = NULL;
-     status = pj_activesock_start_accept(ssock->asock, pool);
-     if (status != PJ_SUCCESS)
- 	goto on_error;
--- 
-2.7.4
-
diff --git a/third-party/pjproject/patches/0006-r5471-svn-backport-Various-fixes-for-DNS-IPv6.patch b/third-party/pjproject/patches/0006-r5471-svn-backport-Various-fixes-for-DNS-IPv6.patch
deleted file mode 100644
index 98c33e511..000000000
--- a/third-party/pjproject/patches/0006-r5471-svn-backport-Various-fixes-for-DNS-IPv6.patch
+++ /dev/null
@@ -1,134 +0,0 @@
-From 2ab7a9f67caf73be3f2215473f72882cfaef4972 Mon Sep 17 00:00:00 2001
-From: Richard Mudgett <rmudgett@digium.com>
-Date: Fri, 28 Oct 2016 12:11:30 -0500
-Subject: [PATCH 1/3] r5471 svn backport Various fixes for DNS IPv6
-
-Fixed #1974: Various fixes for DNS IPv6
----
- pjlib-util/src/pjlib-util/resolver.c     |   11 +++++------
- pjlib-util/src/pjlib-util/srv_resolver.c |   17 +++++++++++++++--
- pjsip/src/pjsip/sip_resolve.c            |   14 +++++++-------
- 3 files changed, 27 insertions(+), 15 deletions(-)
-
-diff --git a/pjlib-util/src/pjlib-util/resolver.c b/pjlib-util/src/pjlib-util/resolver.c
-index e5e1bed..d24ef9d 100644
---- a/pjlib-util/src/pjlib-util/resolver.c
-+++ b/pjlib-util/src/pjlib-util/resolver.c
-@@ -835,7 +835,7 @@ PJ_DEF(pj_status_t) pj_dns_resolver_start_query( pj_dns_resolver *resolver,
-     pj_time_val now;
-     struct res_key key;
-     struct cached_res *cache;
--    pj_dns_async_query *q;
-+    pj_dns_async_query *q, *p_q = NULL;
-     pj_uint32_t hval;
-     pj_status_t status = PJ_SUCCESS;
- 
-@@ -849,9 +849,6 @@ PJ_DEF(pj_status_t) pj_dns_resolver_start_query( pj_dns_resolver *resolver,
-     /* Check type */
-     PJ_ASSERT_RETURN(type > 0 && type < 0xFFFF, PJ_EINVAL);
- 
--    if (p_query)
--	*p_query = NULL;
--
-     /* Build resource key for looking up hash tables */
-     init_res_key(&key, type, name);
- 
-@@ -970,10 +967,12 @@ PJ_DEF(pj_status_t) pj_dns_resolver_start_query( pj_dns_resolver *resolver,
-     pj_hash_set_np(resolver->hquerybyres, &q->key, sizeof(q->key),
- 		   0, q->hbufkey, q);
- 
--    if (p_query)
--	*p_query = q;
-+    p_q = q;
- 
- on_return:
-+    if (p_query)
-+	*p_query = p_q;
-+
-     pj_mutex_unlock(resolver->mutex);
-     return status;
- }
-diff --git a/pjlib-util/src/pjlib-util/srv_resolver.c b/pjlib-util/src/pjlib-util/srv_resolver.c
-index 02672aa..ff9c979 100644
---- a/pjlib-util/src/pjlib-util/srv_resolver.c
-+++ b/pjlib-util/src/pjlib-util/srv_resolver.c
-@@ -187,9 +187,12 @@ PJ_DEF(pj_status_t) pj_dns_srv_cancel_query(pj_dns_srv_async_query *query,
- 	    has_pending = PJ_TRUE;
- 	}
- 	if (srv->q_aaaa) {
--	    pj_dns_resolver_cancel_query(srv->q_aaaa, PJ_FALSE);
-+	    /* Check if it is a dummy query. */
-+	    if (srv->q_aaaa != (pj_dns_async_query*)0x1) {
-+		pj_dns_resolver_cancel_query(srv->q_aaaa, PJ_FALSE);
-+		has_pending = PJ_TRUE;
-+	    }
- 	    srv->q_aaaa = NULL;
--	    has_pending = PJ_TRUE;
- 	}
-     }
- 
-@@ -485,12 +488,22 @@ static pj_status_t resolve_hostnames(pj_dns_srv_async_query *query_job)
- 	srv->common.type = PJ_DNS_TYPE_A;
- 	srv->common_aaaa.type = PJ_DNS_TYPE_AAAA;
- 	srv->parent = query_job;
-+	srv->q_a = NULL;
-+	srv->q_aaaa = NULL;
- 
- 	status = PJ_SUCCESS;
- 
- 	/* Start DNA A record query */
- 	if ((query_job->option & PJ_DNS_SRV_RESOLVE_AAAA_ONLY) == 0)
- 	{
-+	    if ((query_job->option & PJ_DNS_SRV_RESOLVE_AAAA) != 0) {
-+		/* If there will be DNS AAAA query too, let's setup
-+		 * a dummy one here, otherwise app callback may be called
-+		 * immediately (before DNS AAAA query is sent) when
-+		 * DNS A record is available in the cache.
-+		 */
-+		srv->q_aaaa = (pj_dns_async_query*)0x1;
-+	    }
- 	    status = pj_dns_resolver_start_query(query_job->resolver,
- 						 &srv->target_name,
- 						 PJ_DNS_TYPE_A, 0,
-diff --git a/pjsip/src/pjsip/sip_resolve.c b/pjsip/src/pjsip/sip_resolve.c
-index ed326ba..3f3654d 100644
---- a/pjsip/src/pjsip/sip_resolve.c
-+++ b/pjsip/src/pjsip/sip_resolve.c
-@@ -452,7 +452,7 @@ PJ_DEF(void) pjsip_resolve( pjsip_resolver_t *resolver,
- 	}
- 
- 	/* Resolve DNS AAAA record if address family is not fixed to IPv4 */
--	if (af != pj_AF_INET()) {
-+	if (af != pj_AF_INET() && status == PJ_SUCCESS) {
- 	    status = pj_dns_resolver_start_query(resolver->res, 
- 						 &query->naptr[0].name,
- 						 PJ_DNS_TYPE_AAAA, 0, 
-@@ -530,9 +530,9 @@ static void dns_a_callback(void *user_data,
- 
- 	    ++srv->count;
- 	}
--
--    } else {
--
-+    }
-+    
-+    if (status != PJ_SUCCESS) {
- 	char errmsg[PJ_ERR_MSG_SIZE];
- 
- 	/* Log error */
-@@ -593,9 +593,9 @@ static void dns_aaaa_callback(void *user_data,
- 
- 	    ++srv->count;
- 	}
--
--    } else {
--
-+    }
-+    
-+    if (status != PJ_SUCCESS) {
- 	char errmsg[PJ_ERR_MSG_SIZE];
- 
- 	/* Log error */
--- 
-1.7.9.5
-
diff --git a/third-party/pjproject/patches/0006-r5473-svn-backport-Fix-pending-query.patch b/third-party/pjproject/patches/0006-r5473-svn-backport-Fix-pending-query.patch
deleted file mode 100644
index 4d11d57ef..000000000
--- a/third-party/pjproject/patches/0006-r5473-svn-backport-Fix-pending-query.patch
+++ /dev/null
@@ -1,28 +0,0 @@
-From 509d4339747f11cfbde3a0acc447ef5d521eea93 Mon Sep 17 00:00:00 2001
-From: Richard Mudgett <rmudgett@digium.com>
-Date: Fri, 28 Oct 2016 12:12:28 -0500
-Subject: [PATCH 2/3] r5473 svn backport Fix pending query
-
-Re #1974:
-If there is a pending query, set the return value to that query (instead of NULL)
-
-Thanks to Richard Mudgett for the patch.
----
- pjlib-util/src/pjlib-util/resolver.c |    1 +
- 1 file changed, 1 insertion(+)
-
-diff --git a/pjlib-util/src/pjlib-util/resolver.c b/pjlib-util/src/pjlib-util/resolver.c
-index d24ef9d..fe687b7 100644
---- a/pjlib-util/src/pjlib-util/resolver.c
-+++ b/pjlib-util/src/pjlib-util/resolver.c
-@@ -940,6 +940,7 @@ PJ_DEF(pj_status_t) pj_dns_resolver_start_query( pj_dns_resolver *resolver,
- 	/* Done. This child query will be notified once the "parent"
- 	 * query completes.
- 	 */
-+	p_q = nq;
- 	status = PJ_SUCCESS;
- 	goto on_return;
-     } 
--- 
-1.7.9.5
-
diff --git a/third-party/pjproject/patches/0006-r5475-svn-backport-Remove-DNS-cache-entry.patch b/third-party/pjproject/patches/0006-r5475-svn-backport-Remove-DNS-cache-entry.patch
deleted file mode 100644
index e378c30d7..000000000
--- a/third-party/pjproject/patches/0006-r5475-svn-backport-Remove-DNS-cache-entry.patch
+++ /dev/null
@@ -1,70 +0,0 @@
-From 46e1cfa18853a38b7fcdebad782710c5db676657 Mon Sep 17 00:00:00 2001
-From: Richard Mudgett <rmudgett@digium.com>
-Date: Fri, 28 Oct 2016 12:15:44 -0500
-Subject: [PATCH 3/3] r5475 svn backport Remove DNS cache entry
-
-Re #1974: Remove DNS cache entry from resolver's hash table when app callback has a reference.
-
-Thanks to Richard Mudgett for the patch.
----
- pjlib-util/src/pjlib-util/resolver.c |   29 +++++++++++++++--------------
- 1 file changed, 15 insertions(+), 14 deletions(-)
-
-diff --git a/pjlib-util/src/pjlib-util/resolver.c b/pjlib-util/src/pjlib-util/resolver.c
-index fe687b7..52b7655 100644
---- a/pjlib-util/src/pjlib-util/resolver.c
-+++ b/pjlib-util/src/pjlib-util/resolver.c
-@@ -1444,10 +1444,12 @@ static void update_res_cache(pj_dns_resolver *resolver,
-     if (ttl > resolver->settings.cache_max_ttl)
- 	ttl = resolver->settings.cache_max_ttl;
- 
-+    /* Get a cache response entry */
-+    cache = (struct cached_res *) pj_hash_get(resolver->hrescache, key,
-+    					      sizeof(*key), &hval);
-+
-     /* If TTL is zero, clear the same entry in the hash table */
-     if (ttl == 0) {
--	cache = (struct cached_res *) pj_hash_get(resolver->hrescache, key, 
--						  sizeof(*key), &hval);
- 	/* Remove the entry before releasing its pool (see ticket #1710) */
- 	pj_hash_set(NULL, resolver->hrescache, key, sizeof(*key), hval, NULL);
- 
-@@ -1457,24 +1459,23 @@ static void update_res_cache(pj_dns_resolver *resolver,
- 	return;
-     }
- 
--    /* Get a cache response entry */
--    cache = (struct cached_res *) pj_hash_get(resolver->hrescache, key, 
--    					      sizeof(*key), &hval);
-     if (cache == NULL) {
- 	cache = alloc_entry(resolver);
--    } else if (cache->ref_cnt > 1) {
--	/* When cache entry is being used by callback (to app), just decrement
--	 * ref_cnt so it will be freed after the callback returns and allocate
--	 * new entry.
--	 */
--	cache->ref_cnt--;
--	cache = alloc_entry(resolver);
-     } else {
- 	/* Remove the entry before resetting its pool (see ticket #1710) */
- 	pj_hash_set(NULL, resolver->hrescache, key, sizeof(*key), hval, NULL);
- 
--	/* Reset cache to avoid bloated cache pool */
--	reset_entry(&cache);
-+	if (cache->ref_cnt > 1) {
-+	    /* When cache entry is being used by callback (to app),
-+	     * just decrement ref_cnt so it will be freed after
-+	     * the callback returns and allocate new entry.
-+	     */
-+	    cache->ref_cnt--;
-+	    cache = alloc_entry(resolver);
-+	} else {
-+	    /* Reset cache to avoid bloated cache pool */
-+	    reset_entry(&cache);
-+	}
-     }
- 
-     /* Duplicate the packet.
--- 
-1.7.9.5
-
diff --git a/third-party/pjproject/patches/0006-r5477-svn-backport-Fix-DNS-write-on-freed-memory.patch b/third-party/pjproject/patches/0006-r5477-svn-backport-Fix-DNS-write-on-freed-memory.patch
deleted file mode 100644
index f70dd45e7..000000000
--- a/third-party/pjproject/patches/0006-r5477-svn-backport-Fix-DNS-write-on-freed-memory.patch
+++ /dev/null
@@ -1,33 +0,0 @@
-From 732a997010d60fe93a7453e809672386749b0afc Mon Sep 17 00:00:00 2001
-From: Richard Mudgett <rmudgett@digium.com>
-Date: Tue, 1 Nov 2016 12:55:31 -0500
-Subject: [PATCH] r5477 svn backport Fix DNS write on freed memory.
-
-Re #1974: Fix DNS write on freed memory.
-Thanks to Richard Mudgett for the patch.
----
- pjlib-util/src/pjlib-util/resolver.c |    8 +++++++-
- 1 file changed, 7 insertions(+), 1 deletion(-)
-
-diff --git a/pjlib-util/src/pjlib-util/resolver.c b/pjlib-util/src/pjlib-util/resolver.c
-index 52b7655..365772e 100644
---- a/pjlib-util/src/pjlib-util/resolver.c
-+++ b/pjlib-util/src/pjlib-util/resolver.c
-@@ -908,7 +908,13 @@ PJ_DEF(pj_status_t) pj_dns_resolver_start_query( pj_dns_resolver *resolver,
- 	    /* Must return PJ_SUCCESS */
- 	    status = PJ_SUCCESS;
- 
--	    goto on_return;
-+	    /*
-+	     * We cannot write to *p_query after calling cb because what
-+	     * p_query points to may have been freed by cb.
-+             * Refer to ticket #1974.
-+	     */
-+	    pj_mutex_unlock(resolver->mutex);
-+	    return status;
- 	}
- 
- 	/* At this point, we have a cached entry, but this entry has expired.
--- 
-1.7.9.5
-
diff --git a/third-party/pjproject/patches/0012-Re-1945-misc-Don-t-trigger-SRV-complete-callback-whe.patch b/third-party/pjproject/patches/0012-Re-1945-misc-Don-t-trigger-SRV-complete-callback-whe.patch
deleted file mode 100644
index e65556f22..000000000
--- a/third-party/pjproject/patches/0012-Re-1945-misc-Don-t-trigger-SRV-complete-callback-whe.patch
+++ /dev/null
@@ -1,59 +0,0 @@
-From 783de8956190c47a70ffefed56a1a2b21a62b235 Mon Sep 17 00:00:00 2001
-From: Riza Sulistyo <riza@teluu.com>
-Date: Mon, 23 Jan 2017 01:34:12 +0000
-Subject: [PATCH 2/5] Re #1945 (misc): Don't trigger SRV complete callback when
- there is a parse error.
-
-git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@5536 74dad513-b988-da41-8d7b-12977e46ad98
----
- pjlib-util/src/pjlib-util/srv_resolver.c | 24 ++++++++++++++++++------
- 1 file changed, 18 insertions(+), 6 deletions(-)
-
-diff --git a/pjlib-util/src/pjlib-util/srv_resolver.c b/pjlib-util/src/pjlib-util/srv_resolver.c
-index 8a4a599..8a2f7e1 100644
---- a/pjlib-util/src/pjlib-util/srv_resolver.c
-+++ b/pjlib-util/src/pjlib-util/srv_resolver.c
-@@ -652,6 +652,7 @@ static void dns_callback(void *user_data,
- 
-     } else if (query_job->dns_state == PJ_DNS_TYPE_A) {
- 	pj_bool_t is_type_a, srv_completed;
-+        pj_dns_addr_record rec;
- 
- 	/* Clear outstanding job */
- 	if (common->type == PJ_DNS_TYPE_A) {
-@@ -668,15 +669,26 @@ static void dns_callback(void *user_data,
- 
- 	is_type_a = (common->type == PJ_DNS_TYPE_A);
- 
-+        /* Parse response */
-+        if (status==PJ_SUCCESS && pkt->hdr.anscount != 0) {
-+            status = pj_dns_parse_addr_response(pkt, &rec);
-+            if (status!=PJ_SUCCESS) {
-+                char errmsg[PJ_ERR_MSG_SIZE];
-+	        
-+                PJ_LOG(4,(query_job->objname, 
-+		          "DNS %s record parse error for '%.*s'."
-+		          " Err=%d (%s)",
-+                          (is_type_a ? "A" : "AAAA"),
-+		          (int)query_job->domain_part.slen,
-+		          query_job->domain_part.ptr,
-+		          status,
-+		          pj_strerror(status,errmsg,sizeof(errmsg)).ptr));
-+            }
-+        }
-+
- 	/* Check that we really have answer */
- 	if (status==PJ_SUCCESS && pkt->hdr.anscount != 0) {
- 	    char addr[PJ_INET6_ADDRSTRLEN];
--	    pj_dns_addr_record rec;
--
--	    /* Parse response */
--	    status = pj_dns_parse_addr_response(pkt, &rec);
--	    if (status != PJ_SUCCESS)
--		goto on_error;
- 
- 	    pj_assert(rec.addr_count != 0);
- 
--- 
-2.7.4
-
diff --git a/third-party/pjproject/patches/README b/third-party/pjproject/patches/README
new file mode 100644
index 000000000..d16110bbb
--- /dev/null
+++ b/third-party/pjproject/patches/README
@@ -0,0 +1,7 @@
+The 0000-* patches in this directory should not be removed or
+reordered when upgrading to a new version of pjproject.  They
+MAY need to be updated to apply cleanly however.
+
+New patches should be numbered in ascending order with no
+duplicates.  Leave 10 slots open after the last patch to
+allow others to be inserted.
diff --git a/third-party/pjproject/patches/config_site.h b/third-party/pjproject/patches/config_site.h
index 5e29cdb6a..a345734b0 100644
--- a/third-party/pjproject/patches/config_site.h
+++ b/third-party/pjproject/patches/config_site.h
@@ -20,6 +20,12 @@
  */
 #define PJMEDIA_HAS_SRTP 0
 
+/*
+ * Defining PJMEDIA_HAS_WEBRTC_AEC to 0 does NOT disable Asterisk's ability to use
+ * webrtc.  It only disables the pjmedia webrtc transport which Asterisk doesn't use.
+ */
+#define PJMEDIA_HAS_WEBRTC_AEC 0
+
 #define PJ_HAS_IPV6 1
 #define NDEBUG 1
 #define PJ_MAX_HOSTNAME (256)