Fixes bug in chan_sip where nativeformats are not set correctly.

The nativeformats field was being overwritten when it should have been
appended too.  This caused some format capabilities to be lost briefly and
some log warnings to be output.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@307433 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -8881,8 +8881,8 @@ static int process_sdp(struct sip_pvt *p, struct sip_request *req, int t38action
 		ast_codec_choose(&p->prefs, p->jointcaps, 1, &tmp_fmt);
 		ast_format_cap_set(p->owner->nativeformats, &tmp_fmt);
-		ast_format_cap_joint_copy(p->caps, vpeercapability, p->owner->nativeformats);
-		ast_format_cap_joint_copy(p->caps, tpeercapability, p->owner->nativeformats);
+		ast_format_cap_joint_append(p->caps, vpeercapability, p->owner->nativeformats);
+		ast_format_cap_joint_append(p->caps, tpeercapability, p->owner->nativeformats);
 		ast_set_read_format(p->owner, &p->owner->readformat);
 		ast_set_write_format(p->owner, &p->owner->writeformat);

include/asterisk/format_cap.h

@@ -191,6 +191,14 @@ struct ast_format_cap *ast_format_cap_joint(const struct ast_format_cap *cap1, c
  */
 int ast_format_cap_joint_copy(const struct ast_format_cap *cap1, const struct ast_format_cap *cap2, struct ast_format_cap *result);
 
+/*!
+ * \brief Get joint capability structure, append into result capabilities structure
+ *
+ * \retval 1, joint capabilities exist
+ * \retval 0, joint capabilities do not exist
+ */
+int ast_format_cap_joint_append(const struct ast_format_cap *cap1, const struct ast_format_cap *cap2, struct ast_format_cap *result);
+
 /*!
  * \brief Find out if capability structures have any joint capabilities without
  * returning those capabilities.

main/format_cap.c

@@ -409,7 +409,7 @@ struct ast_format_cap *ast_format_cap_joint(const struct ast_format_cap *cap1, c
 	return NULL;
 }
 
-int ast_format_cap_joint_copy(const struct ast_format_cap *cap1, const struct ast_format_cap *cap2, struct ast_format_cap *result)
+static int joint_copy_helper(const struct ast_format_cap *cap1, const struct ast_format_cap *cap2, struct ast_format_cap *result, int append)
 {
 	struct ao2_iterator it;
 	struct ast_format *tmp;
@@ -417,8 +417,9 @@ int ast_format_cap_joint_copy(const struct ast_format_cap *cap1, const struct as
 		.joint_cap = result,
 		.joint_found = 0,
 	};
-
-	ast_format_cap_remove_all(result);
+	if (!append) {
+		ast_format_cap_remove_all(result);
+	}
 	it = ao2_iterator_init(cap1->formats, cap2->nolock ? AO2_ITERATOR_DONTLOCK : 0);
 	while ((tmp = ao2_iterator_next(&it))) {
 		data.format = tmp;
@@ -433,6 +434,16 @@ int ast_format_cap_joint_copy(const struct ast_format_cap *cap1, const struct as
 	return ao2_container_count(result->formats) ? 1 : 0;
 }
 
+int ast_format_cap_joint_append(const struct ast_format_cap *cap1, const struct ast_format_cap *cap2, struct ast_format_cap *result)
+{
+	return joint_copy_helper(cap1, cap2, result, 1);
+}
+
+int ast_format_cap_joint_copy(const struct ast_format_cap *cap1, const struct ast_format_cap *cap2, struct ast_format_cap *result)
+{
+	return joint_copy_helper(cap1, cap2, result, 0);
+}
+
 struct ast_format_cap *ast_format_cap_get_type(const struct ast_format_cap *cap, enum ast_format_type ftype)
 {
 	struct ao2_iterator it;