[gbinder] Added gbinder_client_rpc_header(). JB#55014

Mostly for logging purposes.

include/gbinder_client.h

@@ -1,6 +1,6 @@
 /*
- * Copyright (C) 2018-2020 Jolla Ltd.
- * Copyright (C) 2018-2020 Slava Monich <slava.monich@jolla.com>
+ * Copyright (C) 2018-2021 Jolla Ltd.
+ * Copyright (C) 2018-2021 Slava Monich <slava.monich@jolla.com>
  *
  * You may use this file under the terms of BSD license as follows:
  *
@@ -78,6 +78,11 @@ gbinder_client_interface2(
     GBinderClient* client,
     guint32 code); /* since 1.0.42 */
 
+GBytes*
+gbinder_client_rpc_header(
+    GBinderClient* client,
+    guint32 code); /* since 1.1.14 */
+
 GBinderLocalRequest*
 gbinder_client_new_request(
     GBinderClient* client);

src/gbinder_client.c

@@ -351,6 +351,22 @@ gbinder_client_interface2(
     return NULL;
 }
 
+GBytes*
+gbinder_client_rpc_header(
+    GBinderClient* self,
+    guint32 code) /* since 1.1.14 */
+{
+    if (G_LIKELY(self)) {
+        const GBinderClientIfaceRange* r =
+            gbinder_client_find_range(gbinder_client_cast(self), code);
+
+        if (r) {
+            return r->rpc_header;
+        }
+    }
+    return NULL;
+}
+
 GBinderLocalRequest*
 gbinder_client_new_request(
     GBinderClient* self)

unit/unit_client/unit_client.c

@@ -41,6 +41,7 @@
 #include "gbinder_output_data.h"
 #include "gbinder_remote_object_p.h"
 #include "gbinder_remote_reply.h"
+#include "gbinder_writer.h"
 
 #include <gutil_log.h>
 
@@ -79,6 +80,7 @@ test_null(
     g_assert(!gbinder_client_ref(NULL));
     g_assert(!gbinder_client_interface(NULL));
     g_assert(!gbinder_client_interface2(NULL, 0));
+    g_assert(!gbinder_client_rpc_header(NULL, 0));
     gbinder_client_unref(NULL);
     g_assert(!gbinder_client_new_request(NULL));
     g_assert(!gbinder_client_new_request2(NULL, 0));
@@ -131,6 +133,11 @@ test_interfaces(
     };
     GBinderClient* client = gbinder_client_new2(obj, ifaces,
         G_N_ELEMENTS(ifaces));
+    GBinderWriter writer;
+    GBinderLocalRequest* req;
+    GBytes* rpc_header;
+    gsize len;
+    const void* hdr;
 
     g_assert(client);
     g_assert_cmpstr(gbinder_client_interface(client), == ,"11");
@@ -138,12 +145,25 @@ test_interfaces(
     g_assert_cmpstr(gbinder_client_interface2(client, 22), == ,"22");
     g_assert_cmpstr(gbinder_client_interface2(client, 33), == ,"33");
     g_assert(!gbinder_client_interface2(client, 34));
+    g_assert(!gbinder_client_rpc_header(client, 34));
     g_assert(!gbinder_client_new_request2(client, 34));
     /* Those fail to allocate default request for out-of-range codes: */
     g_assert(!gbinder_client_transact_sync_reply(client, 34, NULL, NULL));
     g_assert_cmpint(gbinder_client_transact_sync_oneway(client, 34, NULL),
         == ,-EINVAL);
     g_assert(!gbinder_client_transact(client, 34, 0, NULL, NULL, NULL, NULL));
+
+    /* Check the RPC header */
+    rpc_header = gbinder_client_rpc_header(client, 33);
+    req = gbinder_client_new_request2(client, 33);
+    g_assert(rpc_header);
+    g_assert(req);
+    gbinder_local_request_init_writer(req, &writer);
+    hdr = gbinder_writer_get_data(&writer, &len);
+    g_assert(hdr);
+    g_assert_cmpuint(len, == ,g_bytes_get_size(rpc_header));
+    g_assert(!memcmp(hdr, g_bytes_get_data(rpc_header, NULL), len));
+    gbinder_local_request_unref(req);
     gbinder_client_unref(client);
 
     /* Client with no interface info */