Use srtp_shutdown when available

This allows the SRTP library to be shut down properly when the
functionality is offered by libsrtp.

Review: https://reviewboard.asterisk.org/r/2538/
(closes issue ASTERISK-21719)
........

Merged revisions 388768 from http://svn.asterisk.org/svn/asterisk/branches/1.8


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/11@388769 65c4cc65-6c06-0410-ace0-fbb531ad65f3

configure.ac

@@ -466,6 +466,7 @@ AST_EXT_LIB_SETUP_DEPENDENT([SPEEX_PREPROCESS], [speex_preprocess_ctl], [], [spe
 AST_EXT_LIB_SETUP([SQLITE], [SQLite], [sqlite])
 AST_EXT_LIB_SETUP([SQLITE3], [SQLite], [sqlite3])
 AST_EXT_LIB_SETUP([SRTP], [Secure RTP], [srtp])
+AST_EXT_LIB_SETUP_OPTIONAL([SRTP_SHUTDOWN], [SRTP Library Shutdown Function], [SRTP], [srtp])
 AST_EXT_LIB_SETUP([OPENSSL], [OpenSSL Secure Sockets Layer], [ssl])
 AST_EXT_LIB_SETUP([SUPPSERV], [mISDN Supplemental Services], [suppserv])
 AST_EXT_LIB_SETUP([FREETDS], [FreeTDS], [tds])
@@ -2181,6 +2182,7 @@ then
     CFLAGS="${saved_cflags}"
 fi
 
+AST_EXT_LIB_CHECK([SRTP_SHUTDOWN], [srtp], [srtp_shutdown], [srtp/srtp.h])
 
 for ver in 2.0 2.2 2.4 2.6; do
 	AST_PKG_CONFIG_CHECK([GMIME], gmime-$ver)

include/asterisk/autoconfig.h.in

@@ -762,6 +762,9 @@
 /* Define to 1 if you have the Secure RTP library. */
 #undef HAVE_SRTP
 
+/* Define to 1 if SRTP has the SRTP Library Shutdown Function feature. */
+#undef HAVE_SRTP_SHUTDOWN
+
 /* Define to 1 if you have the ISDN SS7 library. */
 #undef HAVE_SS7
 
@@ -1229,6 +1232,11 @@
 /* Define to 1 if running on Darwin. */
 #undef _DARWIN_UNLIMITED_SELECT
 
+/* Enable large inode numbers on Mac OS X 10.5.  */
+#ifndef _DARWIN_USE_64_BIT_INODE
+# define _DARWIN_USE_64_BIT_INODE 1
+#endif
+
 /* Number of bits in a file offset, on hosts where this is settable. */
 #undef _FILE_OFFSET_BITS
 

res/res_srtp.c

@@ -546,6 +546,9 @@ static void res_srtp_shutdown(void)
 {
 	srtp_install_event_handler(NULL);
 	ast_rtp_engine_unregister_srtp();
+#ifdef HAVE_SRTP_SHUTDOWN
+	srtp_shutdown();
+#endif
 	g_initialized = 0;
 }