bus-proxy: factor out code for driver handling and message synthesis

Move synthesize_*() into synthesize.c and bus_proxy_process_driver() into
driver.c for better code separation.

1 files changed, 70 insertions, 731 deletions

diff --git a/src/bus-proxyd/bus-proxyd.c b/src/bus-proxyd/bus-proxyd.c
index bd2b0a82cb..0574eb0567 100644
--- a/src/bus-proxyd/bus-proxyd.c
+++ b/src/bus-proxyd/bus-proxyd.c
@@ -48,6 +48,8 @@
 #include "smack-util.h"
 #include "set.h"
 #include "bus-xml-policy.h"
+#include "driver.h"
+#include "synthesize.h"
 
 static char *arg_address = NULL;
 static char *arg_command_line_buffer = NULL;
@@ -245,736 +247,6 @@ static int rename_service(sd_bus *a, sd_bus *b) {
         return 0;
 }
 
-static int synthesize_name_acquired(sd_bus *a, sd_bus *b, sd_bus_message *m) {
-        _cleanup_bus_message_unref_ sd_bus_message *n = NULL;
-        const char *name, *old_owner, *new_owner;
-        int r;
-
-        assert(a);
-        assert(b);
-        assert(m);
-
-        /* If we get NameOwnerChanged for our own name, we need to
-         * synthesize NameLost/NameAcquired, since socket clients need
-         * that, even though it is obsoleted on kdbus */
-
-        if (!a->is_kernel)
-                return 0;
-
-        if (!sd_bus_message_is_signal(m, "org.freedesktop.DBus", "NameOwnerChanged") ||
-            !streq_ptr(m->path, "/org/freedesktop/DBus") ||
-            !streq_ptr(m->sender, "org.freedesktop.DBus"))
-                return 0;
-
-        r = sd_bus_message_read(m, "sss", &name, &old_owner, &new_owner);
-        if (r < 0)
-                return r;
-
-        r = sd_bus_message_rewind(m, true);
-        if (r < 0)
-                return r;
-
-        if (streq(old_owner, a->unique_name)) {
-
-                r = sd_bus_message_new_signal(
-                                b,
-                                &n,
-                                "/org/freedesktop/DBus",
-                                "org.freedesktop.DBus",
-                                "NameLost");
-
-        } else if (streq(new_owner, a->unique_name)) {
-
-                r = sd_bus_message_new_signal(
-                                b,
-                                &n,
-                                "/org/freedesktop/DBus",
-                                "org.freedesktop.DBus",
-                                "NameAcquired");
-        } else
-                return 0;
-
-        if (r < 0)
-                return r;
-
-        r = sd_bus_message_append(n, "s", name);
-        if (r < 0)
-                return r;
-
-        r = bus_message_append_sender(n, "org.freedesktop.DBus");
-        if (r < 0)
-                return r;
-
-        r = bus_seal_synthetic_message(b, n);
-        if (r < 0)
-                return r;
-
-        return sd_bus_send(b, n, NULL);
-}
-
-static int synthetic_driver_send(sd_bus *b, sd_bus_message *m) {
-        int r;
-
-        assert(b);
-        assert(m);
-
-        r = bus_message_append_sender(m, "org.freedesktop.DBus");
-        if (r < 0)
-                return r;
-
-        r = bus_seal_synthetic_message(b, m);
-        if (r < 0)
-                return r;
-
-        return sd_bus_send(b, m, NULL);
-}
-
-static int synthetic_reply_method_error(sd_bus_message *call, const sd_bus_error *e) {
-        _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
-        int r;
-
-        assert(call);
-
-        if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
-                return 0;
-
-        r = sd_bus_message_new_method_error(call, &m, e);
-        if (r < 0)
-                return r;
-
-        return synthetic_driver_send(call->bus, m);
-}
-
-static int synthetic_reply_method_errorf(sd_bus_message *call, const char *name, const char *format, ...) {
-        _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-        va_list ap;
-
-        va_start(ap, format);
-        bus_error_setfv(&error, name, format, ap);
-        va_end(ap);
-
-        return synthetic_reply_method_error(call, &error);
-}
-
-static int synthetic_reply_method_errno(sd_bus_message *call, int error, const sd_bus_error *p) {
-
-        _cleanup_bus_error_free_ sd_bus_error berror = SD_BUS_ERROR_NULL;
-
-        assert(call);
-
-        if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
-                return 0;
-
-        if (sd_bus_error_is_set(p))
-                return synthetic_reply_method_error(call, p);
-
-        sd_bus_error_set_errno(&berror, error);
-
-        return synthetic_reply_method_error(call, &berror);
-}
-
-static int synthetic_reply_method_return(sd_bus_message *call, const char *types, ...) {
-        _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
-        int r;
-
-        assert(call);
-
-        if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
-                return 0;
-
-        r = sd_bus_message_new_method_return(call, &m);
-        if (r < 0)
-                return r;
-
-        if (!isempty(types)) {
-                va_list ap;
-
-                va_start(ap, types);
-                r = bus_message_append_ap(m, types, ap);
-                va_end(ap);
-                if (r < 0)
-                        return r;
-        }
-
-        return synthetic_driver_send(call->bus, m);
-}
-
-static int synthetic_reply_return_strv(sd_bus_message *call, char **l) {
-        _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
-        int r;
-
-        assert(call);
-
-        if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
-                return 0;
-
-        r = sd_bus_message_new_method_return(call, &m);
-        if (r < 0)
-                return synthetic_reply_method_errno(call, r, NULL);
-
-        r = sd_bus_message_append_strv(m, l);
-        if (r < 0)
-                return synthetic_reply_method_errno(call, r, NULL);
-
-        return synthetic_driver_send(call->bus, m);
-}
-
-static int get_creds_by_name(sd_bus *bus, const char *name, uint64_t mask, sd_bus_creds **_creds, sd_bus_error *error) {
-        _cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;
-        int r;
-
-        assert(bus);
-        assert(name);
-        assert(_creds);
-
-        r = sd_bus_get_name_creds(bus, name, mask, &c);
-        if (r == -ESRCH || r == -ENXIO)
-                return sd_bus_error_setf(error, SD_BUS_ERROR_NAME_HAS_NO_OWNER, "Name %s is currently not owned by anyone.", name);
-        if (r < 0)
-                return r;
-
-        if ((c->mask & mask) != mask)
-                return -ENOTSUP;
-
-        *_creds = c;
-        c = NULL;
-
-        return 0;
-}
-
-static int get_creds_by_message(sd_bus *bus, sd_bus_message *m, uint64_t mask, sd_bus_creds **_creds, sd_bus_error *error) {
-        const char *name;
-        int r;
-
-        assert(bus);
-        assert(m);
-        assert(_creds);
-
-        r = sd_bus_message_read(m, "s", &name);
-        if (r < 0)
-                return r;
-
-        return get_creds_by_name(bus, name, mask, _creds, error);
-}
-
-static int process_driver(sd_bus *a, sd_bus *b, sd_bus_message *m, Policy *policy, const struct ucred *ucred, Set *owned_names) {
-        int r;
-
-        assert(a);
-        assert(b);
-        assert(m);
-
-        if (!a->is_kernel)
-                return 0;
-
-        if (!streq_ptr(sd_bus_message_get_destination(m), "org.freedesktop.DBus"))
-                return 0;
-
-        /* The "Hello()" call is is handled in process_hello() */
-
-        if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) {
-
-                if (!sd_bus_message_has_signature(m, ""))
-                        return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
-
-                return synthetic_reply_method_return(m, "s",
-                        "<!DOCTYPE node PUBLIC \"-//freedesktop//DTD D-BUS Object Introspection 1.0//EN\" "
-                          "\"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd\">\n"
-                        "<node>\n"
-                        " <interface name=\"org.freedesktop.DBus.Introspectable\">\n"
-                        "  <method name=\"Introspect\">\n"
-                        "   <arg name=\"data\" type=\"s\" direction=\"out\"/>\n"
-                        "  </method>\n"
-                        " </interface>\n"
-                        " <interface name=\"org.freedesktop.DBus\">\n"
-                        "  <method name=\"AddMatch\">\n"
-                        "   <arg type=\"s\" direction=\"in\"/>\n"
-                        "  </method>\n"
-                        "  <method name=\"RemoveMatch\">\n"
-                        "   <arg type=\"s\" direction=\"in\"/>\n"
-                        "  </method>\n"
-                        "  <method name=\"GetConnectionSELinuxSecurityContext\">\n"
-                        "   <arg type=\"s\" direction=\"in\"/>\n"
-                        "   <arg type=\"ay\" direction=\"out\"/>\n"
-                        "  </method>\n"
-                        "  <method name=\"GetConnectionUnixProcessID\">\n"
-                        "   <arg type=\"s\" direction=\"in\"/>\n"
-                        "   <arg type=\"u\" direction=\"out\"/>\n"
-                        "  </method>\n"
-                        "  <method name=\"GetConnectionUnixUser\">\n"
-                        "   <arg type=\"s\" direction=\"in\"/>\n"
-                        "   <arg type=\"u\" direction=\"out\"/>\n"
-                        "  </method>\n"
-                        "  <method name=\"GetId\">\n"
-                        "   <arg type=\"s\" direction=\"out\"/>\n"
-                        "  </method>\n"
-                        "  <method name=\"GetNameOwner\">\n"
-                        "   <arg type=\"s\" direction=\"in\"/>\n"
-                        "   <arg type=\"s\" direction=\"out\"/>\n"
-                        "  </method>\n"
-                        "  <method name=\"Hello\">\n"
-                        "   <arg type=\"s\" direction=\"out\"/>\n"
-                        "  </method>\n"
-                        "  <method name=\"ListActivatableNames\">\n"
-                        "   <arg type=\"as\" direction=\"out\"/>\n"
-                        "  </method>\n"
-                        "  <method name=\"ListNames\">\n"
-                        "   <arg type=\"as\" direction=\"out\"/>\n"
-                        "  </method>\n"
-                        "  <method name=\"ListQueuedOwners\">\n"
-                        "   <arg type=\"s\" direction=\"in\"/>\n"
-                        "   <arg type=\"as\" direction=\"out\"/>\n"
-                        "  </method>\n"
-                        "  <method name=\"NameHasOwner\">\n"
-                        "   <arg type=\"s\" direction=\"in\"/>\n"
-                        "   <arg type=\"b\" direction=\"out\"/>\n"
-                        "  </method>\n"
-                        "  <method name=\"ReleaseName\">\n"
-                        "   <arg type=\"s\" direction=\"in\"/>\n"
-                        "   <arg type=\"u\" direction=\"out\"/>\n"
-                        "  </method>\n"
-                        "  <method name=\"ReloadConfig\">\n"
-                        "  </method>\n"
-                        "  <method name=\"RequestName\">\n"
-                        "   <arg type=\"s\" direction=\"in\"/>\n"
-                        "   <arg type=\"u\" direction=\"in\"/>\n"
-                        "   <arg type=\"u\" direction=\"out\"/>\n"
-                        "  </method>\n"
-                        "  <method name=\"StartServiceByName\">\n"
-                        "   <arg type=\"s\" direction=\"in\"/>\n"
-                        "   <arg type=\"u\" direction=\"in\"/>\n"
-                        "   <arg type=\"u\" direction=\"out\"/>\n"
-                        "  </method>\n"
-                        "  <method name=\"UpdateActivationEnvironment\">\n"
-                        "   <arg type=\"a{ss}\" direction=\"in\"/>\n"
-                        "  </method>\n"
-                        "  <signal name=\"NameAcquired\">\n"
-                        "   <arg type=\"s\"/>\n"
-                        "  </signal>\n"
-                        "  <signal name=\"NameLost\">\n"
-                        "   <arg type=\"s\"/>\n"
-                        "  </signal>\n"
-                        "  <signal name=\"NameOwnerChanged\">\n"
-                        "   <arg type=\"s\"/>\n"
-                        "   <arg type=\"s\"/>\n"
-                        "   <arg type=\"s\"/>\n"
-                        "  </signal>\n"
-                        " </interface>\n"
-                        "</node>\n");
-
-        } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "AddMatch")) {
-                const char *match;
-
-                if (!sd_bus_message_has_signature(m, "s"))
-                        return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
-
-                r = sd_bus_message_read(m, "s", &match);
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                r = sd_bus_add_match(a, NULL, match, NULL, NULL);
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                return synthetic_reply_method_return(m, NULL);
-
-        } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "RemoveMatch")) {
-                const char *match;
-
-                if (!sd_bus_message_has_signature(m, "s"))
-                        return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
-
-                r = sd_bus_message_read(m, "s", &match);
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                r = bus_remove_match_by_string(a, match, NULL, NULL);
-                if (r == 0)
-                        return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_MATCH_RULE_NOT_FOUND, "Match rule not found"));
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                return synthetic_reply_method_return(m, NULL);
-
-        } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetConnectionSELinuxSecurityContext")) {
-                _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
-                _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-
-                if (!sd_bus_message_has_signature(m, "s"))
-                        return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
-
-                r = get_creds_by_message(a, m, SD_BUS_CREDS_SELINUX_CONTEXT, &creds, &error);
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, &error);
-
-                return synthetic_reply_method_return(m, "y", creds->label, strlen(creds->label));
-
-        } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetConnectionUnixProcessID")) {
-                _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
-                _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-
-                if (!sd_bus_message_has_signature(m, "s"))
-                        return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
-
-                r = get_creds_by_message(a, m, SD_BUS_CREDS_PID, &creds, &error);
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, &error);
-
-                return synthetic_reply_method_return(m, "u", (uint32_t) creds->pid);
-
-        } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetConnectionUnixUser")) {
-                _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
-                _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-
-                if (!sd_bus_message_has_signature(m, "s"))
-                        return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
-
-                r = get_creds_by_message(a, m, SD_BUS_CREDS_UID, &creds, &error);
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, &error);
-
-                return synthetic_reply_method_return(m, "u", (uint32_t) creds->uid);
-
-        } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetId")) {
-                sd_id128_t server_id;
-                char buf[SD_ID128_STRING_MAX];
-
-                if (!sd_bus_message_has_signature(m, ""))
-                        return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
-
-                r = sd_bus_get_bus_id(a, &server_id);
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                return synthetic_reply_method_return(m, "s", sd_id128_to_string(server_id, buf));
-
-        } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetNameOwner")) {
-                const char *name;
-                _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
-                _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-
-                if (!sd_bus_message_has_signature(m, "s"))
-                        return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
-
-                r = sd_bus_message_read(m, "s", &name);
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                if (streq(name, "org.freedesktop.DBus"))
-                        return synthetic_reply_method_return(m, "s", "org.freedesktop.DBus");
-
-                r = get_creds_by_name(a, name, SD_BUS_CREDS_UNIQUE_NAME, &creds, &error);
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, &error);
-
-                return synthetic_reply_method_return(m, "s", creds->unique_name);
-
-        } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ListActivatableNames")) {
-                _cleanup_strv_free_ char **names = NULL;
-
-                if (!sd_bus_message_has_signature(m, ""))
-                        return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
-
-                r = sd_bus_list_names(a, NULL, &names);
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                /* Let's sort the names list to make it stable */
-                strv_sort(names);
-
-                return synthetic_reply_return_strv(m, names);
-
-        } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ListNames")) {
-                _cleanup_strv_free_ char **names = NULL;
-
-                if (!sd_bus_message_has_signature(m, ""))
-                        return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
-
-                r = sd_bus_list_names(a, &names, NULL);
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                r = strv_extend(&names, "org.freedesktop.DBus");
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                /* Let's sort the names list to make it stable */
-                strv_sort(names);
-
-                return synthetic_reply_return_strv(m, names);
-
-        } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ListQueuedOwners")) {
-                struct kdbus_cmd_name_list cmd = {};
-                struct kdbus_name_list *name_list;
-                struct kdbus_name_info *name;
-                _cleanup_strv_free_ char **owners = NULL;
-                _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-                char *arg0;
-                int err = 0;
-
-                if (!sd_bus_message_has_signature(m, "s"))
-                        return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
-
-                r = sd_bus_message_read(m, "s", &arg0);
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                r = sd_bus_get_name_creds(a, arg0, 0, NULL);
-                if (r == -ESRCH || r == -ENXIO) {
-                        sd_bus_error_setf(&error, SD_BUS_ERROR_NAME_HAS_NO_OWNER, "Could not get owners of name '%s': no such name.", arg0);
-                        return synthetic_reply_method_errno(m, r, &error);
-                }
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                cmd.flags = KDBUS_NAME_LIST_QUEUED;
-                r = ioctl(a->input_fd, KDBUS_CMD_NAME_LIST, &cmd);
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, -errno, NULL);
-
-                name_list = (struct kdbus_name_list *) ((uint8_t *) a->kdbus_buffer + cmd.offset);
-
-                KDBUS_ITEM_FOREACH(name, name_list, names) {
-                        const char *entry_name = NULL;
-                        struct kdbus_item *item;
-                        char *n;
-
-                        KDBUS_ITEM_FOREACH(item, name, items)
-                                if (item->type == KDBUS_ITEM_OWNED_NAME)
-                                        entry_name = item->name.name;
-
-                        if (!streq_ptr(entry_name, arg0))
-                                continue;
-
-                        if (asprintf(&n, ":1.%llu", (unsigned long long) name->owner_id) < 0) {
-                                err  = -ENOMEM;
-                                break;
-                        }
-
-                        r = strv_consume(&owners, n);
-                        if (r < 0) {
-                                err = r;
-                                break;
-                        }
-                }
-
-                r = bus_kernel_cmd_free(a, cmd.offset);
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                if (err < 0)
-                        return synthetic_reply_method_errno(m, err, NULL);
-
-                return synthetic_reply_return_strv(m, owners);
-
-        } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "NameHasOwner")) {
-                const char *name;
-
-                if (!sd_bus_message_has_signature(m, "s"))
-                        return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
-
-                r = sd_bus_message_read(m, "s", &name);
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                if (streq(name, "org.freedesktop.DBus"))
-                        return synthetic_reply_method_return(m, "b", true);
-
-                r = sd_bus_get_name_creds(a, name, 0, NULL);
-                if (r < 0 && r != -ESRCH && r != -ENXIO)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                return synthetic_reply_method_return(m, "b", r >= 0);
-
-        } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ReleaseName")) {
-                const char *name;
-
-                if (!sd_bus_message_has_signature(m, "s"))
-                        return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
-
-                r = sd_bus_message_read(m, "s", &name);
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                r = sd_bus_release_name(a, name);
-                if (r < 0) {
-                        if (r == -ESRCH)
-                                return synthetic_reply_method_return(m, "u", BUS_NAME_NON_EXISTENT);
-                        if (r == -EADDRINUSE)
-                                return synthetic_reply_method_return(m, "u", BUS_NAME_NOT_OWNER);
-
-                        return synthetic_reply_method_errno(m, r, NULL);
-                }
-
-                set_remove(owned_names, (char*) name);
-
-                return synthetic_reply_method_return(m, "u", BUS_NAME_RELEASED);
-
-        } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ReloadConfig")) {
-                _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-
-                if (!sd_bus_message_has_signature(m, ""))
-                        return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
-
-                r = sd_bus_error_setf(&error, SD_BUS_ERROR_NOT_SUPPORTED, "%s() is not supported", sd_bus_message_get_member(m));
-
-                return synthetic_reply_method_errno(m, r, &error);
-
-        } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "RequestName")) {
-                const char *name;
-                uint32_t flags, param;
-                bool in_queue;
-
-                if (!sd_bus_message_has_signature(m, "su"))
-                        return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
-
-                r = sd_bus_message_read(m, "su", &name, &flags);
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                if (policy && !policy_check_own(policy, ucred->uid, ucred->gid, name))
-                        return synthetic_reply_method_errno(m, -EPERM, NULL);
-
-                if ((flags & ~(BUS_NAME_ALLOW_REPLACEMENT|BUS_NAME_REPLACE_EXISTING|BUS_NAME_DO_NOT_QUEUE)) != 0)
-                        return synthetic_reply_method_errno(m, -EINVAL, NULL);
-
-                param = 0;
-                if (flags & BUS_NAME_ALLOW_REPLACEMENT)
-                        param |= SD_BUS_NAME_ALLOW_REPLACEMENT;
-                if (flags & BUS_NAME_REPLACE_EXISTING)
-                        param |= SD_BUS_NAME_REPLACE_EXISTING;
-                if (!(flags & BUS_NAME_DO_NOT_QUEUE))
-                        param |= SD_BUS_NAME_QUEUE;
-
-                r = set_put_strdup(owned_names, name);
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                r = sd_bus_request_name(a, name, param);
-                if (r < 0) {
-                        if (r == -EALREADY)
-                                return synthetic_reply_method_return(m, "u", BUS_NAME_ALREADY_OWNER);
-
-                        set_remove(owned_names, (char*) name);
-
-                        if (r == -EEXIST)
-                                return synthetic_reply_method_return(m, "u", BUS_NAME_EXISTS);
-                        return synthetic_reply_method_errno(m, r, NULL);
-                }
-
-                in_queue = (r == 0);
-
-                if (in_queue)
-                        return synthetic_reply_method_return(m, "u", BUS_NAME_IN_QUEUE);
-
-                return synthetic_reply_method_return(m, "u", BUS_NAME_PRIMARY_OWNER);
-
-        } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "StartServiceByName")) {
-                _cleanup_bus_message_unref_ sd_bus_message *msg = NULL;
-                const char *name;
-                uint32_t flags;
-
-                if (!sd_bus_message_has_signature(m, "su"))
-                        return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
-
-                r = sd_bus_message_read(m, "su", &name, &flags);
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                if (flags != 0)
-                        return synthetic_reply_method_errno(m, -EINVAL, NULL);
-
-                r = sd_bus_get_name_creds(a, name, 0, NULL);
-                if (r >= 0 || streq(name, "org.freedesktop.DBus"))
-                        return synthetic_reply_method_return(m, "u", BUS_START_REPLY_ALREADY_RUNNING);
-                if (r != -ESRCH)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                r = sd_bus_message_new_method_call(
-                                a,
-                                &msg,
-                                name,
-                                "/",
-                                "org.freedesktop.DBus.Peer",
-                                "Ping");
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                r = sd_bus_send(a, msg, NULL);
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                return synthetic_reply_method_return(m, "u", BUS_START_REPLY_SUCCESS);
-
-        } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "UpdateActivationEnvironment")) {
-                _cleanup_bus_message_unref_ sd_bus_message *msg = NULL;
-                _cleanup_strv_free_ char **args = NULL;
-
-                if (!sd_bus_message_has_signature(m, "a{ss}"))
-                        return synthetic_reply_method_error(m, &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid parameters"));
-
-                r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "{ss}");
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                while ((r = sd_bus_message_enter_container(m, SD_BUS_TYPE_DICT_ENTRY, "ss")) > 0) {
-                        _cleanup_free_ char *s = NULL;
-                        const char *key;
-                        const char *value;
-
-                        r = sd_bus_message_read(m, "ss", &key, &value);
-                        if (r < 0)
-                                return synthetic_reply_method_errno(m, r, NULL);
-
-                        s = strjoin(key, "=", value, NULL);
-                        if (!s)
-                                return synthetic_reply_method_errno(m, -ENOMEM, NULL);
-
-                        r  = strv_extend(&args, s);
-                        if (r < 0)
-                                return synthetic_reply_method_errno(m, r, NULL);
-
-                        r = sd_bus_message_exit_container(m);
-                        if (r < 0)
-                                return synthetic_reply_method_errno(m, r, NULL);
-                }
-
-                r = sd_bus_message_exit_container(m);
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                if (!args)
-                        return synthetic_reply_method_errno(m, -EINVAL, NULL);
-
-                r = sd_bus_message_new_method_call(
-                                a,
-                                &msg,
-                                "org.freedesktop.systemd1",
-                                "/org/freedesktop/systemd1",
-                                "org.freedesktop.systemd1.Manager",
-                                "SetEnvironment");
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                r = sd_bus_message_append_strv(msg, args);
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-                r = sd_bus_call(a, msg, 0, NULL, NULL);
-                if (r < 0)
-                        return synthetic_reply_method_errno(m, r, NULL);
-
-               return synthetic_reply_method_return(m, NULL);
-
-        } else {
-                _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-
-                r = sd_bus_error_setf(&error, SD_BUS_ERROR_UNKNOWN_METHOD, "Unknown method '%s'.", m->member);
-
-                return synthetic_reply_method_errno(m, r, &error);
-        }
-}
-
 static int handle_policy_error(sd_bus_message *m, int r) {
         if (r == -ESRCH || r == -ENXIO)
                 return synthetic_reply_method_errorf(m, SD_BUS_ERROR_NAME_HAS_NO_OWNER, "Name %s is currently not owned by anyone.", m->destination);
@@ -1315,6 +587,73 @@ static int mac_smack_apply_label_and_drop_cap_mac_admin(pid_t its_pid, const cha
 #endif
 }
 
+static int synthesize_name_acquired(sd_bus *a, sd_bus *b, sd_bus_message *m) {
+        _cleanup_bus_message_unref_ sd_bus_message *n = NULL;
+        const char *name, *old_owner, *new_owner;
+        int r;
+
+        assert(a);
+        assert(b);
+        assert(m);
+
+        /* If we get NameOwnerChanged for our own name, we need to
+         * synthesize NameLost/NameAcquired, since socket clients need
+         * that, even though it is obsoleted on kdbus */
+
+        if (!a->is_kernel)
+                return 0;
+
+        if (!sd_bus_message_is_signal(m, "org.freedesktop.DBus", "NameOwnerChanged") ||
+            !streq_ptr(m->path, "/org/freedesktop/DBus") ||
+            !streq_ptr(m->sender, "org.freedesktop.DBus"))
+                return 0;
+
+        r = sd_bus_message_read(m, "sss", &name, &old_owner, &new_owner);
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_rewind(m, true);
+        if (r < 0)
+                return r;
+
+        if (streq(old_owner, a->unique_name)) {
+
+                r = sd_bus_message_new_signal(
+                                b,
+                                &n,
+                                "/org/freedesktop/DBus",
+                                "org.freedesktop.DBus",
+                                "NameLost");
+
+        } else if (streq(new_owner, a->unique_name)) {
+
+                r = sd_bus_message_new_signal(
+                                b,
+                                &n,
+                                "/org/freedesktop/DBus",
+                                "org.freedesktop.DBus",
+                                "NameAcquired");
+        } else
+                return 0;
+
+        if (r < 0)
+                return r;
+
+        r = sd_bus_message_append(n, "s", name);
+        if (r < 0)
+                return r;
+
+        r = bus_message_append_sender(n, "org.freedesktop.DBus");
+        if (r < 0)
+                return r;
+
+        r = bus_seal_synthetic_message(b, n);
+        if (r < 0)
+                return r;
+
+        return sd_bus_send(b, n, NULL);
+}
+
 int main(int argc, char *argv[]) {
 
         _cleanup_bus_close_unref_ sd_bus *a = NULL, *b = NULL;
@@ -1717,7 +1056,7 @@ int main(int argc, char *argv[]) {
                         }
 
                         if (!processed) {
-                                k = process_driver(a, b, m, policy, &ucred, owned_names);
+                                k = bus_proxy_process_driver(a, b, m, policy, &ucred, owned_names);
                                 if (k < 0) {
                                         r = k;
                                         log_error_errno(r, "Failed to process driver calls: %m");