src: simplify ALPN code, remove indirection

PR-URL: #44875
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>

src/crypto/crypto_common.cc

@@ -89,12 +89,6 @@ void LogSecret(
   keylog_cb(ssl.get(), line.c_str());
 }
 
-bool SetALPN(const SSLPointer& ssl, std::string_view alpn) {
-  return SSL_set_alpn_protos(ssl.get(),
-                             reinterpret_cast<const uint8_t*>(alpn.data()),
-                             alpn.length()) == 0;
-}
-
 MaybeLocal<Value> GetSSLOCSPResponse(
     Environment* env,
     SSL* ssl,

src/crypto/crypto_common.h

@@ -33,9 +33,6 @@ void LogSecret(
     const unsigned char* secret,
     size_t secretlen);
 
-// TODO(tniessen): use std::u8string_view when we switch to C++20.
-bool SetALPN(const SSLPointer& ssl, std::string_view alpn);
-
 v8::MaybeLocal<v8::Value> GetSSLOCSPResponse(
     Environment* env,
     SSL* ssl,

src/crypto/crypto_tls.cc

@@ -1529,17 +1529,18 @@ void TLSWrap::SetALPNProtocols(const FunctionCallbackInfo<Value>& args) {
   if (args.Length() < 1 || !Buffer::HasInstance(args[0]))
     return env->ThrowTypeError("Must give a Buffer as first argument");
 
+  SSL* ssl = w->ssl_.get();
   if (w->is_client()) {
-    ArrayBufferViewContents<char> protos(args[0].As<ArrayBufferView>());
-    CHECK(SetALPN(w->ssl_, {protos.data(), protos.length()}));
+    ArrayBufferViewContents<uint8_t> protos(args[0].As<ArrayBufferView>());
+    CHECK_EQ(0, SSL_set_alpn_protos(ssl, protos.data(), protos.length()));
   } else {
     CHECK(
         w->object()->SetPrivate(
             env->context(),
             env->alpn_buffer_private_symbol(),
             args[0]).FromJust());
     // Server should select ALPN protocol from list of advertised by client
-    SSL_CTX_set_alpn_select_cb(SSL_get_SSL_CTX(w->ssl_.get()),
+    SSL_CTX_set_alpn_select_cb(SSL_get_SSL_CTX(ssl),
                                SelectALPNCallback,
                                nullptr);
   }