Recorded merge of revisions 417677 from http://svn.asterisk.org/svn/asterisk/branches/11

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res_rtp_asterisk: Add SHA-256 support for DTLS and perform DTLS negotiation on RTCP.

This change fixes up DTLS support in res_rtp_asterisk so it can accept and provide
a SHA-256 fingerprint, so it occurs on RTCP, and so it occurs after ICE negotiation
completes. Configuration options to chan_sip and chan_pjsip have also been added to
allow behavior to be tweaked (such as forcing the AVP type media transports in SDP).

ASTERISK-22961 #close
Reported by: Jay Jideliov

Review: https://reviewboard.asterisk.org/r/3679/
Review: https://reviewboard.asterisk.org/r/3686/
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Merged revisions 417678 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@417679 65c4cc65-6c06-0410-ace0-fbb531ad65f3

contrib/ast-db-manage/config/versions/51f8cb66540e_add_further_dtls_options.py

@@ -0,0 +1,32 @@
+"""add further dtls options
+
+Revision ID: 51f8cb66540e
+Revises: c6d929b23a8
+Create Date: 2014-06-30 07:16:12.291684
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '51f8cb66540e'
+down_revision = 'c6d929b23a8'
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects.postgresql import ENUM
+
+YESNO_NAME = 'yesno_values'
+YESNO_VALUES = ['yes', 'no']
+
+def upgrade():
+    ############################# Enums ##############################
+
+    # yesno_values have already been created, so use postgres enum object
+    # type to get around "already created" issue - works okay with mysql
+    yesno_values = ENUM(*YESNO_VALUES, name=YESNO_NAME, create_type=False)
+
+    op.add_column('ps_endpoints', sa.Column('force_avp', yesno_values))
+    op.add_column('ps_endpoints', sa.Column('media_use_received_transport', yesno_values))
+
+def downgrade():
+    op.drop_column('ps_endpoints', 'force_avp')
+    op.drop_column('ps_endpoints', 'media_use_received_transport')