diff options
| -rw-r--r-- | src/bus-proxyd/bus-proxyd.c | 494 |
1 files changed, 490 insertions, 4 deletions
diff --git a/src/bus-proxyd/bus-proxyd.c b/src/bus-proxyd/bus-proxyd.c index 38a8d14b7e..c5f9f002fe 100644 --- a/src/bus-proxyd/bus-proxyd.c +++ b/src/bus-proxyd/bus-proxyd.c @@ -4,6 +4,8 @@ This file is part of systemd. Copyright 2010 Lennart Poettering + Copyright 2013 Daniel Mack + Copyright 2014 Kay Sievers systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by @@ -336,7 +338,6 @@ static int synthetic_reply_method_errno(sd_bus_message *call, int error, const s } static int synthetic_reply_method_return(sd_bus_message *call, const char *types, ...) { - _cleanup_bus_message_unref_ sd_bus_message *m = NULL; int r; @@ -360,6 +361,85 @@ static int synthetic_reply_method_return(sd_bus_message *call, const char *types 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; + + 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); + + assert_return(service_name_is_valid(name), -EINVAL); + + r = sd_bus_get_owner(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 peer_is_privileged(sd_bus *bus, sd_bus_message *m) { + _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; + uid_t uid; + int r; + + r = get_creds_by_message(bus, m, SD_BUS_CREDS_UID, &creds, NULL); + if (r < 0) + return r; + + r = sd_bus_creds_get_uid(creds, &uid); + if (r < 0) + return r; + + r = sd_bus_creds_has_effective_cap(creds, CAP_SYS_ADMIN); + if (r > 0) + return true; + + if (uid == getuid()) + return true; + + return false; +} + + static int process_driver(sd_bus *a, sd_bus *b, sd_bus_message *m) { int r; @@ -370,7 +450,101 @@ static int process_driver(sd_bus *a, sd_bus *b, sd_bus_message *m) { if (!streq_ptr(sd_bus_message_get_destination(m), "org.freedesktop.DBus")) return 0; - if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "AddMatch")) { + if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) { + if (0 && !isempty(sd_bus_message_get_signature(m, true))) { + _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; + + r = sd_bus_error_setf(&error, SD_BUS_ERROR_INVALID_ARGS, "Expected no parameters"); + + return synthetic_reply_method_errno(m, r, &error); + } + + 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; r = sd_bus_message_read(m, "s", &match); @@ -395,9 +569,321 @@ static int process_driver(sd_bus *a, sd_bus *b, sd_bus_message *m) { return synthetic_reply_method_errno(m, r, NULL); return synthetic_reply_method_return(m, NULL); - } - return 0; + } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "GetConnectionSELinuxSecurityContext")) { + _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; + + r = get_creds_by_message(a, m, SD_BUS_CREDS_SELINUX_CONTEXT, &creds, NULL); + if (r < 0) + return synthetic_reply_method_errno(m, r, NULL); + + 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; + + r = get_creds_by_message(a, m, SD_BUS_CREDS_PID, &creds, NULL); + if (r < 0) + return synthetic_reply_method_errno(m, r, NULL); + + 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; + + r = get_creds_by_message(a, m, SD_BUS_CREDS_UID, &creds, NULL); + if (r < 0) + return synthetic_reply_method_errno(m, r, NULL); + + 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]; + + r = sd_bus_get_server_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; + + 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); + + /* "Hello" is handled in process_hello() */ + + } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ListActivatableNames")) { + _cleanup_strv_free_ char **names = NULL; + + 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; + + 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_cmd_name *name; + _cleanup_strv_free_ char **owners = NULL; + char *arg0; + int err = 0; + + r = sd_bus_message_read(m, "s", &arg0); + if (r < 0) + return synthetic_reply_method_errno(m, r, NULL); + + if (service_name_is_valid(arg0) < 0) + return synthetic_reply_method_errno(m, -EINVAL, 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) { + char *n; + + if (name->size <= sizeof(*name)) + continue; + + if (!streq(name->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 = ioctl(a->input_fd, KDBUS_CMD_FREE, &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; + + r = sd_bus_message_read(m, "s", &name); + 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 (streq(name, "org.freedesktop.DBus")) + return synthetic_reply_method_return(m, "b", true); + + r = sd_bus_get_owner(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; + + r = sd_bus_message_read(m, "s", &name); + 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); + + r = sd_bus_release_name(a, name); + if (r < 0) { + if (r == -ESRCH) + synthetic_reply_method_return(m, "u", BUS_NAME_NON_EXISTENT); + if (r == -EADDRINUSE) + synthetic_reply_method_return(m, "u", BUS_NAME_NOT_OWNER); + return synthetic_reply_method_errno(m, r, NULL); + } + + 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; + + 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; + + 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 & ~(BUS_NAME_ALLOW_REPLACEMENT|BUS_NAME_REPLACE_EXISTING|BUS_NAME_DO_NOT_QUEUE)) != 0) + return synthetic_reply_method_errno(m, -EINVAL, NULL); + + r = sd_bus_request_name(a, name, flags); + if (r < 0) { + if (r == -EEXIST) + 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) { |