Turn on SNI by default on hosts with resources.

Author: dgarske

CMakeLists.txt

@@ -1299,7 +1299,6 @@ endif()
 #       - CRL monitor
 #       - User crypto
 #       - Whitewood netRandom client library
-#       - SNI
 #       - Max fragment length
 #       - ALPN
 #       - Trusted CA indication
@@ -1315,8 +1314,14 @@ add_option(WOLFSSL_CRL
     "Enable CRL (Use =io for inline CRL HTTP GET) (default: disabled)"
     "no" "yes;no;io")
 
+
+set(SNI_DEFAULT "no")
+if(("${CMAKE_SYSTEM_PROCESSOR}" MATCHES "x86_64|x86|AMD64|arm64") OR
+    ("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "aarch64"))
+    set(SNI_DEFAULT "yes")
+endif()
 set(WOLFSSL_SNI_HELP_STRING "Enable SNI (default: disabled)")
-add_option(WOLFSSL_SNI ${WOLFSSL_SNI_HELP_STRING} "no" "yes;no")
+add_option(WOLFSSL_SNI ${WOLFSSL_SNI_HELP_STRING} ${SNI_DEFAULT} "yes;no")
 
 set(WOLFSSL_TLSX_HELP_STRING "Enable all TLS Extensions (default: disabled)")
 add_option(WOLFSSL_TLSX ${WOLFSSL_TLSX_HELP_STRING} "no" "yes;no")

configure.ac

@@ -4971,21 +4971,22 @@ AC_ARG_WITH([wnr],
 
 
 # SNI
+# enable SNI automatically for x86_64/x86/aarch64/amd64
+SNI_DEFAULT=no
+if test "$host_cpu" = "x86_64" || test "$host_cpu" = "x86" || test "$host_cpu" = "aarch64" || test "$host_cpu" = "amd64"
+then
+    SNI_DEFAULT=yes
+fi
 AC_ARG_ENABLE([sni],
-    [AS_HELP_STRING([--enable-sni],[Enable SNI (default: disabled)])],
+    [AS_HELP_STRING([--enable-sni],[Enable SNI (default: enabled on x86_64/x86/aarch64/amd64)])],
     [ ENABLED_SNI=$enableval ],
-    [ ENABLED_SNI=no ]
+    [ ENABLED_SNI=$SNI_DEFAULT ]
     )
-if test "x$ENABLED_QT" = "xyes"
+if test "x$ENABLED_QT" = "xyes" || test "$ENABLED_QUIC" = "yes"
 then
     ENABLED_SNI="yes"
 fi
 
-if test "$ENABLED_QUIC" = "yes"
-then
-    ENABLED_SNI=yes
-fi
-
 if test "x$ENABLED_SNI" = "xyes"
 then
     AM_CFLAGS="$AM_CFLAGS -DHAVE_TLS_EXTENSIONS -DHAVE_SNI"