Feature/mbedtls (#84)

* try to import mbedtls and build it

* add stubs socket class

* some boilterplate, read and write function implemented

* more boilterplate / current error in handshake because no CA cert is setup

* add something so skip ca verification, can ws curl https://google.com !

* cleanup / close implemented

* tweak CMakefiles

* typo in include

* update readme

* disable unittests

third_party/mbedtls/tests/scripts/check-names.sh

@@ -0,0 +1,115 @@
+#!/bin/sh
+#
+# This file is part of mbed TLS (https://tls.mbed.org)
+#
+# Copyright (c) 2015-2019, ARM Limited, All Rights Reserved
+
+set -eu
+
+if [ $# -ne 0 ] && [ "$1" = "--help" ]; then
+    cat <<EOF
+$0 [-v]
+This script confirms that the naming of all symbols and identifiers in mbed
+TLS are consistent with the house style and are also self-consistent.
+
+  -v    If the script fails unexpectedly, print a command trace.
+EOF
+    exit
+fi
+
+if grep --version|head -n1|grep GNU >/dev/null; then :; else
+    echo "This script requires GNU grep.">&2
+    exit 1
+fi
+
+trace=
+if [ $# -ne 0 ] && [ "$1" = "-v" ]; then
+  shift
+  trace='-x'
+  exec 2>check-names.err
+  trap 'echo "FAILED UNEXPECTEDLY, status=$?";
+        cat check-names.err' EXIT
+  set -x
+fi
+
+printf "Analysing source code...\n"
+
+sh $trace tests/scripts/list-macros.sh
+tests/scripts/list-enum-consts.pl
+sh $trace tests/scripts/list-identifiers.sh
+sh $trace tests/scripts/list-symbols.sh
+
+FAIL=0
+
+printf "\nExported symbols declared in header: "
+UNDECLARED=$( diff exported-symbols identifiers | sed -n -e 's/^< //p' )
+if [ "x$UNDECLARED" = "x" ]; then
+    echo "PASS"
+else
+    echo "FAIL"
+    echo "$UNDECLARED"
+    FAIL=1
+fi
+
+diff macros identifiers | sed -n -e 's/< //p' > actual-macros
+
+for THING in actual-macros enum-consts; do
+    printf "Names of $THING: "
+    test -r $THING
+    BAD=$( grep -v '^MBEDTLS_[0-9A-Z_]*[0-9A-Z]$' $THING || true )
+    if [ "x$BAD" = "x" ]; then
+        echo "PASS"
+    else
+        echo "FAIL"
+        echo "$BAD"
+        FAIL=1
+    fi
+done
+
+for THING in identifiers; do
+    printf "Names of $THING: "
+    test -r $THING
+    BAD=$( grep -v '^mbedtls_[0-9a-z_]*[0-9a-z]$' $THING || true )
+    if [ "x$BAD" = "x" ]; then
+        echo "PASS"
+    else
+        echo "FAIL"
+        echo "$BAD"
+        FAIL=1
+    fi
+done
+
+printf "Likely typos: "
+sort -u actual-macros enum-consts > _caps
+HEADERS=$( ls include/mbedtls/*.h | egrep -v 'compat-1\.3\.h' )
+NL='
+'
+sed -n 's/MBED..._[A-Z0-9_]*/\'"$NL"'&\'"$NL"/gp \
+    $HEADERS library/*.c \
+    | grep MBEDTLS | sort -u > _MBEDTLS_XXX
+TYPOS=$( diff _caps _MBEDTLS_XXX | sed -n 's/^> //p' \
+            | egrep -v 'XXX|__|_$|^MBEDTLS_.*CONFIG_FILE$' || true )
+rm _MBEDTLS_XXX _caps
+if [ "x$TYPOS" = "x" ]; then
+    echo "PASS"
+else
+    echo "FAIL"
+    echo "$TYPOS"
+    FAIL=1
+fi
+
+if [ -n "$trace" ]; then
+  set +x
+  trap - EXIT
+  rm check-names.err
+fi
+
+printf "\nOverall: "
+if [ "$FAIL" -eq 0 ]; then
+    rm macros actual-macros enum-consts identifiers exported-symbols
+    echo "PASSED"
+    exit 0
+else
+    echo "FAILED"
+    exit 1
+fi