diff options
Diffstat (limited to 'src/bus-proxyd/synthesize.c')
| -rw-r--r-- | src/bus-proxyd/synthesize.c | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/src/bus-proxyd/synthesize.c b/src/bus-proxyd/synthesize.c new file mode 100644 index 0000000000..8eea7dc5b9 --- /dev/null +++ b/src/bus-proxyd/synthesize.c @@ -0,0 +1,225 @@ +/*** + 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 + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <stddef.h> + +#include "sd-bus.h" + +#include "bus-internal.h" +#include "bus-match.h" +#include "bus-message.h" +#include "bus-util.h" +#include "synthesize.h" +#include "util.h" + +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); +} + +int synthetic_reply_method_error(sd_bus_message *call, const sd_bus_error *e) { + _cleanup_(sd_bus_message_unrefp) 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); +} + +int synthetic_reply_method_errorf(sd_bus_message *call, const char *name, const char *format, ...) { + _cleanup_(sd_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); +} + +int synthetic_reply_method_errno(sd_bus_message *call, int error, const sd_bus_error *p) { + _cleanup_(sd_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); +} + +int synthetic_reply_method_errnof(sd_bus_message *call, int error, const char *format, ...) { + _cleanup_(sd_bus_error_free) sd_bus_error berror = SD_BUS_ERROR_NULL; + va_list ap; + + assert(call); + + if (call->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) + return 0; + + va_start(ap, format); + sd_bus_error_set_errnofv(&berror, error, format, ap); + va_end(ap); + + return synthetic_reply_method_error(call, &berror); +} + +int synthetic_reply_method_return(sd_bus_message *call, const char *types, ...) { + _cleanup_(sd_bus_message_unrefp) 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); +} + +int synthetic_reply_method_return_strv(sd_bus_message *call, char **l) { + _cleanup_(sd_bus_message_unrefp) 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); +} + +int synthesize_name_acquired(Proxy *p, sd_bus *a, sd_bus *b, sd_bus_message *m) { + _cleanup_(sd_bus_message_unrefp) sd_bus_message *n = NULL; + const char *name, *old_owner, *new_owner; + int r; + + assert(p); + 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 = sd_bus_message_set_destination(n, a->unique_name); + if (r < 0) + return r; + + r = bus_seal_synthetic_message(b, n); + if (r < 0) + return r; + + return sd_bus_send(b, n, NULL); +} |