bus-proxyd: handle org.freedesktob.DBus calls natively
This commit is contained in:
Kay Sievers
parent
7d95c772cb
commit
dc780ecf10
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@ -4,6 +4,8 @@
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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Copyright 2013 Daniel Mack
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Copyright 2014 Kay Sievers
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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@ -336,7 +338,6 @@ static int synthetic_reply_method_errno(sd_bus_message *call, int error, const s
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}
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static int synthetic_reply_method_return(sd_bus_message *call, const char *types, ...) {
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_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
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int r;
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@ -360,6 +361,85 @@ static int synthetic_reply_method_return(sd_bus_message *call, const char *types
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return synthetic_driver_send(call->bus, m);
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}
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static int synthetic_reply_return_strv(sd_bus_message *call, char **l) {
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_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
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int r;
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r = sd_bus_message_new_method_return(call, &m);
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if (r < 0)
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return synthetic_reply_method_errno(call, r, NULL);
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r = sd_bus_message_append_strv(m, l);
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if (r < 0)
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return synthetic_reply_method_errno(call, r, NULL);
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return synthetic_driver_send(call->bus, m);
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}
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static int get_creds_by_name(sd_bus *bus, const char *name, uint64_t mask, sd_bus_creds **_creds, sd_bus_error *error) {
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_cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;
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int r;
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assert(bus);
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assert(name);
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assert(_creds);
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assert_return(service_name_is_valid(name), -EINVAL);
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r = sd_bus_get_owner(bus, name, mask, &c);
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if (r == -ESRCH || r == -ENXIO)
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return sd_bus_error_setf(error, SD_BUS_ERROR_NAME_HAS_NO_OWNER, "Name %s is currently not owned by anyone.", name);
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if (r < 0)
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return r;
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if ((c->mask & mask) != mask)
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return -ENOTSUP;
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*_creds = c;
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c = NULL;
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return 0;
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}
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static int get_creds_by_message(sd_bus *bus, sd_bus_message *m, uint64_t mask, sd_bus_creds **_creds, sd_bus_error *error) {
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const char *name;
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int r;
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assert(bus);
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assert(m);
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assert(_creds);
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r = sd_bus_message_read(m, "s", &name);
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if (r < 0)
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return r;
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return get_creds_by_name(bus, name, mask, _creds, error);
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}
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static int peer_is_privileged(sd_bus *bus, sd_bus_message *m) {
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_cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
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uid_t uid;
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int r;
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r = get_creds_by_message(bus, m, SD_BUS_CREDS_UID, &creds, NULL);
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if (r < 0)
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return r;
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r = sd_bus_creds_get_uid(creds, &uid);
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if (r < 0)
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return r;
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r = sd_bus_creds_has_effective_cap(creds, CAP_SYS_ADMIN);
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if (r > 0)
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return true;
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if (uid == getuid())
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return true;
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return false;
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}
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static int process_driver(sd_bus *a, sd_bus *b, sd_bus_message *m) {
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int r;
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@ -370,7 +450,101 @@ static int process_driver(sd_bus *a, sd_bus *b, sd_bus_message *m) {
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if (!streq_ptr(sd_bus_message_get_destination(m), "org.freedesktop.DBus"))
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return 0;
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if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "AddMatch")) {
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if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) {
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if (0 && !isempty(sd_bus_message_get_signature(m, true))) {
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_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
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r = sd_bus_error_setf(&error, SD_BUS_ERROR_INVALID_ARGS, "Expected no parameters");
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return synthetic_reply_method_errno(m, r, &error);
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}
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return synthetic_reply_method_return(m, "s",
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"<!DOCTYPE node PUBLIC \"-//freedesktop//DTD D-BUS Object Introspection 1.0//EN\" "
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"\"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd\">\n"
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"<node>\n"
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" <interface name=\"org.freedesktop.DBus.Introspectable\">\n"
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" <method name=\"Introspect\">\n"
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" <arg name=\"data\" type=\"s\" direction=\"out\"/>\n"
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" </method>\n"
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" </interface>\n"
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" <interface name=\"org.freedesktop.DBus\">\n"
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" <method name=\"AddMatch\">\n"
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" <arg type=\"s\" direction=\"in\"/>\n"
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" </method>\n"
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" <method name=\"RemoveMatch\">\n"
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" <arg type=\"s\" direction=\"in\"/>\n"
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" </method>\n"
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" <method name=\"GetConnectionSELinuxSecurityContext\">\n"
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" <arg type=\"s\" direction=\"in\"/>\n"
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" <arg type=\"ay\" direction=\"out\"/>\n"
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" </method>\n"
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" <method name=\"GetConnectionUnixProcessID\">\n"
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" <arg type=\"s\" direction=\"in\"/>\n"
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" <arg type=\"u\" direction=\"out\"/>\n"
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" </method>\n"
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" <method name=\"GetConnectionUnixUser\">\n"
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" <arg type=\"s\" direction=\"in\"/>\n"
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" <arg type=\"u\" direction=\"out\"/>\n"
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" </method>\n"
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" <method name=\"GetId\">\n"
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" <arg type=\"s\" direction=\"out\"/>\n"
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" </method>\n"
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" <method name=\"GetNameOwner\">\n"
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" <arg type=\"s\" direction=\"in\"/>\n"
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" <arg type=\"s\" direction=\"out\"/>\n"
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" </method>\n"
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" <method name=\"Hello\">\n"
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" <arg type=\"s\" direction=\"out\"/>\n"
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" </method>\n"
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" <method name=\"ListActivatableNames\">\n"
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" <arg type=\"as\" direction=\"out\"/>\n"
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" </method>\n"
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" <method name=\"ListNames\">\n"
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" <arg type=\"as\" direction=\"out\"/>\n"
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" </method>\n"
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" <method name=\"ListQueuedOwners\">\n"
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" <arg type=\"s\" direction=\"in\"/>\n"
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" <arg type=\"as\" direction=\"out\"/>\n"
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" </method>\n"
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" <method name=\"NameHasOwner\">\n"
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" <arg type=\"s\" direction=\"in\"/>\n"
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" <arg type=\"b\" direction=\"out\"/>\n"
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" </method>\n"
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" <method name=\"ReleaseName\">\n"
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" <arg type=\"s\" direction=\"in\"/>\n"
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" <arg type=\"u\" direction=\"out\"/>\n"
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" </method>\n"
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" <method name=\"ReloadConfig\">\n"
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" </method>\n"
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" <method name=\"RequestName\">\n"
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" <arg type=\"s\" direction=\"in\"/>\n"
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" <arg type=\"u\" direction=\"in\"/>\n"
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" <arg type=\"u\" direction=\"out\"/>\n"
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" </method>\n"
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" <method name=\"StartServiceByName\">\n"
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" <arg type=\"s\" direction=\"in\"/>\n"
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" <arg type=\"u\" direction=\"in\"/>\n"
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" <arg type=\"u\" direction=\"out\"/>\n"
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" </method>\n"
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" <method name=\"UpdateActivationEnvironment\">\n"
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" <arg type=\"a{ss}\" direction=\"in\"/>\n"
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" </method>\n"
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" <signal name=\"NameAcquired\">\n"
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" <arg type=\"s\"/>\n"
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" </signal>\n"
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" <signal name=\"NameLost\">\n"
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" <arg type=\"s\"/>\n"
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" </signal>\n"
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" <signal name=\"NameOwnerChanged\">\n"
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" <arg type=\"s\"/>\n"
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" <arg type=\"s\"/>\n"
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" <arg type=\"s\"/>\n"
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" </signal>\n"
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" </interface>\n"
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"</node>\n");
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} else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "AddMatch")) {
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const char *match;
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r = sd_bus_message_read(m, "s", &match);
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@ -395,9 +569,321 @@ static int process_driver(sd_bus *a, sd_bus *b, sd_bus_message *m) {
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return synthetic_reply_method_errno(m, r, NULL);
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return synthetic_reply_method_return(m, NULL);
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}
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return 0;
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} else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetConnectionSELinuxSecurityContext")) {
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_cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
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r = get_creds_by_message(a, m, SD_BUS_CREDS_SELINUX_CONTEXT, &creds, NULL);
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if (r < 0)
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return synthetic_reply_method_errno(m, r, NULL);
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return synthetic_reply_method_return(m, "y", creds->label, strlen(creds->label));
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} else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetConnectionUnixProcessID")) {
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_cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
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r = get_creds_by_message(a, m, SD_BUS_CREDS_PID, &creds, NULL);
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if (r < 0)
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return synthetic_reply_method_errno(m, r, NULL);
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return synthetic_reply_method_return(m, "u", (uint32_t) creds->pid);
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} else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetConnectionUnixUser")) {
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_cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
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r = get_creds_by_message(a, m, SD_BUS_CREDS_UID, &creds, NULL);
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if (r < 0)
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return synthetic_reply_method_errno(m, r, NULL);
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return synthetic_reply_method_return(m, "u", (uint32_t) creds->uid);
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} else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetId")) {
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sd_id128_t server_id;
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char buf[SD_ID128_STRING_MAX];
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r = sd_bus_get_server_id(a, &server_id);
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if (r < 0)
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return synthetic_reply_method_errno(m, r, NULL);
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return synthetic_reply_method_return(m, "s", sd_id128_to_string(server_id, buf));
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} else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetNameOwner")) {
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const char *name;
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_cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
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_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
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r = sd_bus_message_read(m, "s", &name);
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if (r < 0)
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return synthetic_reply_method_errno(m, r, NULL);
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if (streq(name, "org.freedesktop.DBus"))
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return synthetic_reply_method_return(m, "s", "org.freedesktop.DBus");
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r = get_creds_by_name(a, name, SD_BUS_CREDS_UNIQUE_NAME, &creds, &error);
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if (r < 0)
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return synthetic_reply_method_errno(m, r, &error);
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return synthetic_reply_method_return(m, "s", creds->unique_name);
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/* "Hello" is handled in process_hello() */
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} else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ListActivatableNames")) {
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_cleanup_strv_free_ char **names = NULL;
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r = sd_bus_list_names(a, NULL, &names);
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if (r < 0)
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return synthetic_reply_method_errno(m, r, NULL);
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/* Let's sort the names list to make it stable */
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strv_sort(names);
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return synthetic_reply_return_strv(m, names);
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} else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ListNames")) {
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_cleanup_strv_free_ char **names = NULL;
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r = sd_bus_list_names(a, &names, NULL);
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if (r < 0)
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return synthetic_reply_method_errno(m, r, NULL);
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r = strv_extend(&names, "org.freedesktop.DBus");
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if (r < 0)
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return synthetic_reply_method_errno(m, r, NULL);
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/* Let's sort the names list to make it stable */
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strv_sort(names);
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return synthetic_reply_return_strv(m, names);
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} else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ListQueuedOwners")) {
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struct kdbus_cmd_name_list cmd = {};
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struct kdbus_name_list *name_list;
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struct kdbus_cmd_name *name;
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_cleanup_strv_free_ char **owners = NULL;
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char *arg0;
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int err = 0;
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r = sd_bus_message_read(m, "s", &arg0);
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if (r < 0)
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return synthetic_reply_method_errno(m, r, NULL);
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if (service_name_is_valid(arg0) < 0)
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return synthetic_reply_method_errno(m, -EINVAL, NULL);
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cmd.flags = KDBUS_NAME_LIST_QUEUED;
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r = ioctl(a->input_fd, KDBUS_CMD_NAME_LIST, &cmd);
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if (r < 0)
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return synthetic_reply_method_errno(m, -errno, NULL);
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name_list = (struct kdbus_name_list *) ((uint8_t *) a->kdbus_buffer + cmd.offset);
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KDBUS_ITEM_FOREACH(name, name_list, names) {
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char *n;
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if (name->size <= sizeof(*name))
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continue;
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if (!streq(name->name, arg0))
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continue;
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if (asprintf(&n, ":1.%llu", (unsigned long long) name->owner_id) < 0) {
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err = -ENOMEM;
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break;
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}
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r = strv_consume(&owners, n);
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if (r < 0) {
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err = r;
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break;
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}
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}
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r = ioctl(a->input_fd, KDBUS_CMD_FREE, &cmd.offset);
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if (r < 0)
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return synthetic_reply_method_errno(m, r, NULL);
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if (err > 0)
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return synthetic_reply_method_errno(m, err, NULL);
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return synthetic_reply_return_strv(m, owners);
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} else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "NameHasOwner")) {
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const char *name;
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r = sd_bus_message_read(m, "s", &name);
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if (r < 0)
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return synthetic_reply_method_errno(m, r, NULL);
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if (service_name_is_valid(name) < 0)
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return synthetic_reply_method_errno(m, -EINVAL, NULL);
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if (streq(name, "org.freedesktop.DBus"))
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return synthetic_reply_method_return(m, "b", true);
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r = sd_bus_get_owner(a, name, 0, NULL);
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if (r < 0 && r != -ESRCH && r != -ENXIO)
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return synthetic_reply_method_errno(m, r, NULL);
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return synthetic_reply_method_return(m, "b", r >= 0);
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} else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ReleaseName")) {
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const char *name;
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r = sd_bus_message_read(m, "s", &name);
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if (r < 0)
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return synthetic_reply_method_errno(m, r, NULL);
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if (service_name_is_valid(name) < 0)
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return synthetic_reply_method_errno(m, -EINVAL, NULL);
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r = sd_bus_release_name(a, name);
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if (r < 0) {
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if (r == -ESRCH)
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synthetic_reply_method_return(m, "u", BUS_NAME_NON_EXISTENT);
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if (r == -EADDRINUSE)
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synthetic_reply_method_return(m, "u", BUS_NAME_NOT_OWNER);
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return synthetic_reply_method_errno(m, r, NULL);
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}
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return synthetic_reply_method_return(m, "u", BUS_NAME_RELEASED);
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} else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ReloadConfig")) {
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_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
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r = sd_bus_error_setf(&error, SD_BUS_ERROR_NOT_SUPPORTED, "%s() is not supported", sd_bus_message_get_member(m));
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return synthetic_reply_method_errno(m, r, &error);
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} else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "RequestName")) {
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const char *name;
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uint32_t flags;
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r = sd_bus_message_read(m, "su", &name, &flags);
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if (r < 0)
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return synthetic_reply_method_errno(m, r, NULL);
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if (service_name_is_valid(name) < 0)
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return synthetic_reply_method_errno(m, -EINVAL, NULL);
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if ((flags & ~(BUS_NAME_ALLOW_REPLACEMENT|BUS_NAME_REPLACE_EXISTING|BUS_NAME_DO_NOT_QUEUE)) != 0)
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return synthetic_reply_method_errno(m, -EINVAL, NULL);
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r = sd_bus_request_name(a, name, flags);
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if (r < 0) {
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if (r == -EEXIST)
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return synthetic_reply_method_return(m, "u", BUS_NAME_EXISTS);
|
||||
if (r == -EALREADY)
|
||||
return synthetic_reply_method_return(m, "u", BUS_NAME_ALREADY_OWNER);
|
||||
return synthetic_reply_method_errno(m, r, NULL);
|
||||
}
|
||||
|
||||
if (r == 0)
|
||||
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;
|
||||
|
||||
r = sd_bus_message_read(m, "su", &name, &flags);
|
||||
if (r < 0)
|
||||
return synthetic_reply_method_errno(m, r, NULL);
|
||||
|
||||
if (service_name_is_valid(name) < 0)
|
||||
return synthetic_reply_method_errno(m, -EINVAL, NULL);
|
||||
if (flags != 0)
|
||||
return synthetic_reply_method_errno(m, -EINVAL, NULL);
|
||||
|
||||
r = sd_bus_get_owner(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 (!peer_is_privileged(a, m))
|
||||
return synthetic_reply_method_errno(m, -EPERM, NULL);
|
||||
|
||||
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 process_hello(sd_bus *a, sd_bus *b, sd_bus_message *m, bool *got_hello) {
|
||||
|
|
|
|||
Loading…
Reference in a new issue