[Qemu-devel] [PATCH v11 10/24] qapi: Unbox base members

[Eric Blake]

Rather than storing a base class as a pointer to a box, just
store the fields of that base class in the same order, so that
a child struct can be directly cast to its parent.  This gives
less malloc overhead, less pointer dereferencing, and even less
generated code.  Compare to the earlier commit 1e6c1616a "qapi:
Generate a nicer struct for flat unions" (although that patch
had fewer places to change, as less of qemu was directly using
qapi structs for flat unions).  It also allows us to turn on
automatic type-safe wrappers for upcasting to the base class
of a struct.

Changes to the generated code look like this in qapi-types.h:

| struct SpiceChannel {
|-    SpiceBasicInfo *base;
|+    /* Members inherited from SpiceBasicInfo: */
|+    char *host;
|+    char *port;
|+    NetworkAddressFamily family;
|+    /* Own members: */
|     int64_t connection_id;

as well as added upcast functions like qapi_SpiceChannel_base().
Meanwhile, changes to qapi-visit.c look like:

| static void visit_type_SpiceChannel_fields(Visitor *v, SpiceChannel **obj, 
Error **errp)
| {
|     Error *err = NULL;
|
|-    visit_type_implicit_SpiceBasicInfo(v, &(*obj)->base, &err);
|+    visit_type_SpiceBasicInfo_fields(v, (SpiceBasicInfo **)obj, &err);
|     if (err) {

(the cast is necessary, since our upcast wrappers only deal with a
single pointer, not pointer-to-pointer); plus the wholesale
elimination of some now-unused visit_type_implicit_FOO() functions.

Without boxing, the corner case of one empty struct having
another empty struct as its base type now requires inserting a
dummy member (previously, the 'Base *base' member sufficed).

And now that we no longer consume a 'base' member in the generated
C struct, we can delete the former negative struct-base-clash-base
test.

Signed-off-by: Eric Blake <address@hidden>

---
v11: delay gen_upcast for structs until here, rebase to proper use
of gen_visit_fields_decl() in gen_visit_struct_fields(), improve
commit message
v10: split off some of the cleanups into earlier patches, improve
commit message, don't emit visit_type_FOO_fields out of order,
save positive tests in qapi-schema-tests for later
v9: (no v6-8): hoist from v5 34/46, rebase to master
---
 hmp.c                                         |  6 +++---
 scripts/qapi-types.py                         | 12 ++++--------
 scripts/qapi-visit.py                         | 15 +++++++--------
 tests/Makefile                                |  1 -
 tests/qapi-schema/struct-base-clash-base.err  |  0
 tests/qapi-schema/struct-base-clash-base.exit |  1 -
 tests/qapi-schema/struct-base-clash-base.json |  9 ---------
 tests/qapi-schema/struct-base-clash-base.out  |  5 -----
 tests/test-qmp-commands.c                     | 15 +++++----------
 tests/test-qmp-event.c                        |  8 ++------
 tests/test-qmp-input-visitor.c                |  4 ++--
 tests/test-qmp-output-visitor.c               | 13 +++++--------
 tests/test-visitor-serialization.c            | 14 ++++++--------
 ui/spice-core.c                               | 23 +++++++++++++----------
 ui/vnc.c                                      | 21 ++++++++++-----------
 15 files changed, 57 insertions(+), 90 deletions(-)
 delete mode 100644 tests/qapi-schema/struct-base-clash-base.err
 delete mode 100644 tests/qapi-schema/struct-base-clash-base.exit
 delete mode 100644 tests/qapi-schema/struct-base-clash-base.json
 delete mode 100644 tests/qapi-schema/struct-base-clash-base.out

diff --git a/hmp.c b/hmp.c
index 5048eee..88fd804 100644
--- a/hmp.c
+++ b/hmp.c
@@ -569,8 +569,8 @@ void hmp_info_vnc(Monitor *mon, const QDict *qdict)
         for (client = info->clients; client; client = client->next) {
             monitor_printf(mon, "Client:\n");
             monitor_printf(mon, "     address: %s:%s\n",
-                           client->value->base->host,
-                           client->value->base->service);
+                           client->value->host,
+                           client->value->service);
             monitor_printf(mon, "  x509_dname: %s\n",
                            client->value->x509_dname ?
                            client->value->x509_dname : "none");
@@ -638,7 +638,7 @@ void hmp_info_spice(Monitor *mon, const QDict *qdict)
         for (chan = info->channels; chan; chan = chan->next) {
             monitor_printf(mon, "Channel:\n");
             monitor_printf(mon, "     address: %s:%s%s\n",
-                           chan->value->base->host, chan->value->base->port,
+                           chan->value->host, chan->value->port,
                            chan->value->tls ? " [tls]" : "");
             monitor_printf(mon, "     session: %" PRId64 "\n",
                            chan->value->connection_id);
diff --git a/scripts/qapi-types.py b/scripts/qapi-types.py
index f9fcf15..faf7022 100644
--- a/scripts/qapi-types.py
+++ b/scripts/qapi-types.py
@@ -77,16 +77,13 @@ struct %(c_name)s {
 ''',
                 c_name=c_name(name))

-    if base:
-        ret += gen_struct_field('base', base, False)
-
-    ret += gen_struct_fields(members)
+    ret += gen_struct_fields(members, base)

     # Make sure that all structs have at least one field; this avoids
     # potential issues with attempting to malloc space for zero-length
     # structs in C, and also incompatibility with C++ (where an empty
     # struct is size 1).
-    if not base and not members:
+    if not (base and base.members) and not members:
         ret += mcgen('''
     char qapi_dummy_field_for_empty_struct;
 ''')
@@ -280,11 +277,10 @@ class QAPISchemaGenTypeVisitor(QAPISchemaVisitor):
         if variants:
             assert not members      # not implemented
             self.decl += gen_union(name, base, variants)
-            # TODO Use gen_upcast on structs too, once they have sane layout
-            if base:
-                self.decl += gen_upcast(name, base)
         else:
             self.decl += gen_struct(name, base, members)
+        if base:
+            self.decl += gen_upcast(name, base)
         self._gen_type_cleanup(name)

     def visit_alternate_type(self, name, info, variants):
diff --git a/scripts/qapi-visit.py b/scripts/qapi-visit.py
index d4408f2..f711a72 100644
--- a/scripts/qapi-visit.py
+++ b/scripts/qapi-visit.py
@@ -72,13 +72,12 @@ static void visit_type_implicit_%(c_type)s(Visitor *v, 
%(c_type)s **obj, Error *


 def gen_visit_struct_fields(name, base, members):
+    ret = ''
+
+    if base:
+        ret += gen_visit_fields_decl(base)
+
     struct_fields_seen.add(name)
-
-    ret = ''
-
-    if base:
-        ret += gen_visit_implicit_struct(base)
-
     ret += mcgen('''

 static void visit_type_%(c_name)s_fields(Visitor *v, %(c_name)s **obj, Error 
**errp)
@@ -90,9 +89,9 @@ static void visit_type_%(c_name)s_fields(Visitor *v, 
%(c_name)s **obj, Error **e

     if base:
         ret += mcgen('''
-    visit_type_implicit_%(c_type)s(v, &(*obj)->%(c_name)s, &err);
+    visit_type_%(c_type)s_fields(v, (%(c_type)s **)obj, &err);
 ''',
-                     c_type=base.c_name(), c_name=c_name('base'))
+                     c_type=base.c_name())
         ret += gen_err_check()

     ret += gen_visit_fields(members, prefix='(*obj)->')
diff --git a/tests/Makefile b/tests/Makefile
index 54022d6..6d7c07e 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -325,7 +325,6 @@ qapi-schema += returns-array-bad.json
 qapi-schema += returns-dict.json
 qapi-schema += returns-unknown.json
 qapi-schema += returns-whitelist.json
-qapi-schema += struct-base-clash-base.json
 qapi-schema += struct-base-clash-deep.json
 qapi-schema += struct-base-clash.json
 qapi-schema += struct-data-invalid.json
diff --git a/tests/qapi-schema/struct-base-clash-base.err 
b/tests/qapi-schema/struct-base-clash-base.err
deleted file mode 100644
index e69de29..0000000
diff --git a/tests/qapi-schema/struct-base-clash-base.exit 
b/tests/qapi-schema/struct-base-clash-base.exit
deleted file mode 100644
index 573541a..0000000
--- a/tests/qapi-schema/struct-base-clash-base.exit
+++ /dev/null
@@ -1 +0,0 @@
-0
diff --git a/tests/qapi-schema/struct-base-clash-base.json 
b/tests/qapi-schema/struct-base-clash-base.json
deleted file mode 100644
index 0c84025..0000000
--- a/tests/qapi-schema/struct-base-clash-base.json
+++ /dev/null
@@ -1,9 +0,0 @@
-# Struct member 'base'
-# FIXME: this parses, but then fails to compile due to a duplicate 'base'
-# (one explicit in QMP, the other used to box the base class members).
-# We should either reject the collision at parse time, or change the
-# generated struct to allow this to compile.
-{ 'struct': 'Base', 'data': {} }
-{ 'struct': 'Sub',
-  'base': 'Base',
-  'data': { 'base': 'str' } }
diff --git a/tests/qapi-schema/struct-base-clash-base.out 
b/tests/qapi-schema/struct-base-clash-base.out
deleted file mode 100644
index e69a416..0000000
--- a/tests/qapi-schema/struct-base-clash-base.out
+++ /dev/null
@@ -1,5 +0,0 @@
-object :empty
-object Base
-object Sub
-    base Base
-    member base: str optional=False
diff --git a/tests/test-qmp-commands.c b/tests/test-qmp-commands.c
index bc59835..ea700d8 100644
--- a/tests/test-qmp-commands.c
+++ b/tests/test-qmp-commands.c
@@ -25,11 +25,9 @@ UserDefTwo *qmp_user_def_cmd2(UserDefOne *ud1a,
     UserDefOne *ud1d = g_malloc0(sizeof(UserDefOne));

     ud1c->string = strdup(ud1a->string);
-    ud1c->base = g_new0(UserDefZero, 1);
-    ud1c->base->integer = ud1a->base->integer;
+    ud1c->integer = ud1a->integer;
     ud1d->string = strdup(has_udb1 ? ud1b->string : "blah0");
-    ud1d->base = g_new0(UserDefZero, 1);
-    ud1d->base->integer = has_udb1 ? ud1b->base->integer : 0;
+    ud1d->integer = has_udb1 ? ud1b->integer : 0;

     ret = g_new0(UserDefTwo, 1);
     ret->string0 = strdup("blah1");
@@ -176,20 +174,17 @@ static void test_dealloc_types(void)
     UserDefOneList *ud1list;

     ud1test = g_malloc0(sizeof(UserDefOne));
-    ud1test->base = g_new0(UserDefZero, 1);
-    ud1test->base->integer = 42;
+    ud1test->integer = 42;
     ud1test->string = g_strdup("hi there 42");

     qapi_free_UserDefOne(ud1test);

     ud1a = g_malloc0(sizeof(UserDefOne));
-    ud1a->base = g_new0(UserDefZero, 1);
-    ud1a->base->integer = 43;
+    ud1a->integer = 43;
     ud1a->string = g_strdup("hi there 43");

     ud1b = g_malloc0(sizeof(UserDefOne));
-    ud1b->base = g_new0(UserDefZero, 1);
-    ud1b->base->integer = 44;
+    ud1b->integer = 44;
     ud1b->string = g_strdup("hi there 44");

     ud1list = g_malloc0(sizeof(UserDefOneList));
diff --git a/tests/test-qmp-event.c b/tests/test-qmp-event.c
index 28f146d..035c65c 100644
--- a/tests/test-qmp-event.c
+++ b/tests/test-qmp-event.c
@@ -179,9 +179,7 @@ static void test_event_c(TestEventData *data,
     QDict *d, *d_data, *d_b;

     UserDefOne b;
-    UserDefZero z;
-    z.integer = 2;
-    b.base = &z;
+    b.integer = 2;
     b.string = g_strdup("test1");
     b.has_enum1 = false;

@@ -209,11 +207,9 @@ static void test_event_d(TestEventData *data,
 {
     UserDefOne struct1;
     EventStructOne a;
-    UserDefZero z;
     QDict *d, *d_data, *d_a, *d_struct1;

-    z.integer = 2;
-    struct1.base = &z;
+    struct1.integer = 2;
     struct1.string = g_strdup("test1");
     struct1.has_enum1 = true;
     struct1.enum1 = ENUM_ONE_VALUE1;
diff --git a/tests/test-qmp-input-visitor.c b/tests/test-qmp-input-visitor.c
index da21709..2d95db9 100644
--- a/tests/test-qmp-input-visitor.c
+++ b/tests/test-qmp-input-visitor.c
@@ -262,7 +262,7 @@ static void 
test_visitor_in_struct_nested(TestInputVisitorData *data,

     check_and_free_str(udp->string0, "string0");
     check_and_free_str(udp->dict1->string1, "string1");
-    g_assert_cmpint(udp->dict1->dict2->userdef->base->integer, ==, 42);
+    g_assert_cmpint(udp->dict1->dict2->userdef->integer, ==, 42);
     check_and_free_str(udp->dict1->dict2->userdef->string, "string");
     check_and_free_str(udp->dict1->dict2->string, "string2");
     g_assert(udp->dict1->has_dict3 == false);
@@ -292,7 +292,7 @@ static void test_visitor_in_list(TestInputVisitorData *data,

         snprintf(string, sizeof(string), "string%d", i);
         g_assert_cmpstr(item->value->string, ==, string);
-        g_assert_cmpint(item->value->base->integer, ==, 42 + i);
+        g_assert_cmpint(item->value->integer, ==, 42 + i);
     }

     qapi_free_UserDefOneList(head);
diff --git a/tests/test-qmp-output-visitor.c b/tests/test-qmp-output-visitor.c
index c84002e..cfb06bb 100644
--- a/tests/test-qmp-output-visitor.c
+++ b/tests/test-qmp-output-visitor.c
@@ -250,16 +250,14 @@ static void 
test_visitor_out_struct_nested(TestOutputVisitorData *data,
     ud2->dict1->dict2 = g_malloc0(sizeof(*ud2->dict1->dict2));
     ud2->dict1->dict2->userdef = g_new0(UserDefOne, 1);
     ud2->dict1->dict2->userdef->string = g_strdup(string);
-    ud2->dict1->dict2->userdef->base = g_new0(UserDefZero, 1);
-    ud2->dict1->dict2->userdef->base->integer = value;
+    ud2->dict1->dict2->userdef->integer = value;
     ud2->dict1->dict2->string = g_strdup(strings[2]);

     ud2->dict1->dict3 = g_malloc0(sizeof(*ud2->dict1->dict3));
     ud2->dict1->has_dict3 = true;
     ud2->dict1->dict3->userdef = g_new0(UserDefOne, 1);
     ud2->dict1->dict3->userdef->string = g_strdup(string);
-    ud2->dict1->dict3->userdef->base = g_new0(UserDefZero, 1);
-    ud2->dict1->dict3->userdef->base->integer = value;
+    ud2->dict1->dict3->userdef->integer = value;
     ud2->dict1->dict3->string = g_strdup(strings[3]);

     visit_type_UserDefTwo(data->ov, &ud2, "unused", &err);
@@ -301,8 +299,8 @@ static void 
test_visitor_out_struct_errors(TestOutputVisitorData *data,
                                            const void *unused)
 {
     EnumOne bad_values[] = { ENUM_ONE_MAX, -1 };
-    UserDefZero b;
-    UserDefOne u = { .base = &b }, *pu = &u;
+    UserDefOne u = {0};
+    UserDefOne *pu = &u;
     Error *err;
     int i;

@@ -416,8 +414,7 @@ static void 
test_visitor_out_list_qapi_free(TestOutputVisitorData *data,
         p->value->dict1->dict2 = g_new0(UserDefTwoDictDict, 1);
         p->value->dict1->dict2->userdef = g_new0(UserDefOne, 1);
         p->value->dict1->dict2->userdef->string = g_strdup(string);
-        p->value->dict1->dict2->userdef->base = g_new0(UserDefZero, 1);
-        p->value->dict1->dict2->userdef->base->integer = 42;
+        p->value->dict1->dict2->userdef->integer = 42;
         p->value->dict1->dict2->string = g_strdup(string);
         p->value->dict1->has_dict3 = false;

diff --git a/tests/test-visitor-serialization.c 
b/tests/test-visitor-serialization.c
index fa86cae..634563b 100644
--- a/tests/test-visitor-serialization.c
+++ b/tests/test-visitor-serialization.c
@@ -258,15 +258,13 @@ static UserDefTwo *nested_struct_create(void)
     udnp->dict1->string1 = strdup("test_string1");
     udnp->dict1->dict2 = g_malloc0(sizeof(*udnp->dict1->dict2));
     udnp->dict1->dict2->userdef = g_new0(UserDefOne, 1);
-    udnp->dict1->dict2->userdef->base = g_new0(UserDefZero, 1);
-    udnp->dict1->dict2->userdef->base->integer = 42;
+    udnp->dict1->dict2->userdef->integer = 42;
     udnp->dict1->dict2->userdef->string = strdup("test_string");
     udnp->dict1->dict2->string = strdup("test_string2");
     udnp->dict1->dict3 = g_malloc0(sizeof(*udnp->dict1->dict3));
     udnp->dict1->has_dict3 = true;
     udnp->dict1->dict3->userdef = g_new0(UserDefOne, 1);
-    udnp->dict1->dict3->userdef->base = g_new0(UserDefZero, 1);
-    udnp->dict1->dict3->userdef->base->integer = 43;
+    udnp->dict1->dict3->userdef->integer = 43;
     udnp->dict1->dict3->userdef->string = strdup("test_string");
     udnp->dict1->dict3->string = strdup("test_string3");
     return udnp;
@@ -278,15 +276,15 @@ static void nested_struct_compare(UserDefTwo *udnp1, 
UserDefTwo *udnp2)
     g_assert(udnp2);
     g_assert_cmpstr(udnp1->string0, ==, udnp2->string0);
     g_assert_cmpstr(udnp1->dict1->string1, ==, udnp2->dict1->string1);
-    g_assert_cmpint(udnp1->dict1->dict2->userdef->base->integer, ==,
-                    udnp2->dict1->dict2->userdef->base->integer);
+    g_assert_cmpint(udnp1->dict1->dict2->userdef->integer, ==,
+                    udnp2->dict1->dict2->userdef->integer);
     g_assert_cmpstr(udnp1->dict1->dict2->userdef->string, ==,
                     udnp2->dict1->dict2->userdef->string);
     g_assert_cmpstr(udnp1->dict1->dict2->string, ==,
                     udnp2->dict1->dict2->string);
     g_assert(udnp1->dict1->has_dict3 == udnp2->dict1->has_dict3);
-    g_assert_cmpint(udnp1->dict1->dict3->userdef->base->integer, ==,
-                    udnp2->dict1->dict3->userdef->base->integer);
+    g_assert_cmpint(udnp1->dict1->dict3->userdef->integer, ==,
+                    udnp2->dict1->dict3->userdef->integer);
     g_assert_cmpstr(udnp1->dict1->dict3->userdef->string, ==,
                     udnp2->dict1->dict3->userdef->string);
     g_assert_cmpstr(udnp1->dict1->dict3->string, ==,
diff --git a/ui/spice-core.c b/ui/spice-core.c
index bf4fd07..6a62d71 100644
--- a/ui/spice-core.c
+++ b/ui/spice-core.c
@@ -200,8 +200,6 @@ static void channel_event(int event, SpiceChannelEventInfo 
*info)
 {
     SpiceServerInfo *server = g_malloc0(sizeof(*server));
     SpiceChannel *client = g_malloc0(sizeof(*client));
-    server->base = g_malloc0(sizeof(*server->base));
-    client->base = g_malloc0(sizeof(*client->base));

     /*
      * Spice server might have called us from spice worker thread
@@ -218,9 +216,11 @@ static void channel_event(int event, SpiceChannelEventInfo 
*info)
     }

     if (info->flags & SPICE_CHANNEL_EVENT_FLAG_ADDR_EXT) {
-        add_addr_info(client->base, (struct sockaddr *)&info->paddr_ext,
+        add_addr_info(qapi_SpiceChannel_base(client),
+                      (struct sockaddr *)&info->paddr_ext,
                       info->plen_ext);
-        add_addr_info(server->base, (struct sockaddr *)&info->laddr_ext,
+        add_addr_info(qapi_SpiceServerInfo_base(server),
+                      (struct sockaddr *)&info->laddr_ext,
                       info->llen_ext);
     } else {
         error_report("spice: %s, extended address is expected",
@@ -229,7 +229,9 @@ static void channel_event(int event, SpiceChannelEventInfo 
*info)

     switch (event) {
     case SPICE_CHANNEL_EVENT_CONNECTED:
-        qapi_event_send_spice_connected(server->base, client->base, 
&error_abort);
+        qapi_event_send_spice_connected(qapi_SpiceServerInfo_base(server),
+                                        qapi_SpiceChannel_base(client),
+                                        &error_abort);
         break;
     case SPICE_CHANNEL_EVENT_INITIALIZED:
         if (auth) {
@@ -242,7 +244,9 @@ static void channel_event(int event, SpiceChannelEventInfo 
*info)
         break;
     case SPICE_CHANNEL_EVENT_DISCONNECTED:
         channel_list_del(info);
-        qapi_event_send_spice_disconnected(server->base, client->base, 
&error_abort);
+        qapi_event_send_spice_disconnected(qapi_SpiceServerInfo_base(server),
+                                           qapi_SpiceChannel_base(client),
+                                           &error_abort);
         break;
     default:
         break;
@@ -378,16 +382,15 @@ static SpiceChannelList *qmp_query_spice_channels(void)

         chan = g_malloc0(sizeof(*chan));
         chan->value = g_malloc0(sizeof(*chan->value));
-        chan->value->base = g_malloc0(sizeof(*chan->value->base));

         paddr = (struct sockaddr *)&item->info->paddr_ext;
         plen = item->info->plen_ext;
         getnameinfo(paddr, plen,
                     host, sizeof(host), port, sizeof(port),
                     NI_NUMERICHOST | NI_NUMERICSERV);
-        chan->value->base->host = g_strdup(host);
-        chan->value->base->port = g_strdup(port);
-        chan->value->base->family = inet_netfamily(paddr->sa_family);
+        chan->value->host = g_strdup(host);
+        chan->value->port = g_strdup(port);
+        chan->value->family = inet_netfamily(paddr->sa_family);

         chan->value->connection_id = item->info->connection_id;
         chan->value->channel_type = item->info->type;
diff --git a/ui/vnc.c b/ui/vnc.c
index 502a10a..cec2cee 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -262,8 +262,8 @@ static VncServerInfo *vnc_server_info_get(VncDisplay *vd)
     Error *err = NULL;

     info = g_malloc(sizeof(*info));
-    info->base = g_malloc(sizeof(*info->base));
-    vnc_init_basic_info_from_server_addr(vd->lsock, info->base, &err);
+    vnc_init_basic_info_from_server_addr(vd->lsock,
+                                         qapi_VncServerInfo_base(info), &err);
     info->has_auth = true;
     info->auth = g_strdup(vnc_auth_name(vd));
     if (err) {
@@ -300,8 +300,8 @@ static void vnc_client_cache_addr(VncState *client)
     Error *err = NULL;

     client->info = g_malloc0(sizeof(*client->info));
-    client->info->base = g_malloc0(sizeof(*client->info->base));
-    vnc_init_basic_info_from_remote_addr(client->csock, client->info->base,
+    vnc_init_basic_info_from_remote_addr(client->csock,
+                                         qapi_VncClientInfo_base(client->info),
                                          &err);
     if (err) {
         qapi_free_VncClientInfo(client->info);
@@ -317,7 +317,6 @@ static void vnc_qmp_event(VncState *vs, QAPIEvent event)
     if (!vs->info) {
         return;
     }
-    g_assert(vs->info->base);

     si = vnc_server_info_get(vs->vd);
     if (!si) {
@@ -326,7 +325,8 @@ static void vnc_qmp_event(VncState *vs, QAPIEvent event)

     switch (event) {
     case QAPI_EVENT_VNC_CONNECTED:
-        qapi_event_send_vnc_connected(si, vs->info->base, &error_abort);
+        qapi_event_send_vnc_connected(si, qapi_VncClientInfo_base(vs->info),
+                                      &error_abort);
         break;
     case QAPI_EVENT_VNC_INITIALIZED:
         qapi_event_send_vnc_initialized(si, vs->info, &error_abort);
@@ -361,11 +361,10 @@ static VncClientInfo *qmp_query_vnc_client(const VncState 
*client)
     }

     info = g_malloc0(sizeof(*info));
-    info->base = g_malloc0(sizeof(*info->base));
-    info->base->host = g_strdup(host);
-    info->base->service = g_strdup(serv);
-    info->base->family = inet_netfamily(sa.ss_family);
-    info->base->websocket = client->websocket;
+    info->host = g_strdup(host);
+    info->service = g_strdup(serv);
+    info->family = inet_netfamily(sa.ss_family);
+    info->websocket = client->websocket;

     if (client->tls) {
         info->x509_dname = qcrypto_tls_session_get_peer_name(client->tls);
-- 
2.4.3