1 /* SPDX-License-Identifier: LGPL-2.1+ */
5 This file is part of systemd.
7 Copyright 2013 Lennart Poettering
9 systemd is free software; you can redistribute it and/or modify it
10 under the terms of the GNU Lesser General Public License as published by
11 the Free Software Foundation; either version 2.1 of the License, or
12 (at your option) any later version.
14 systemd is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 Lesser General Public License for more details.
19 You should have received a copy of the GNU Lesser General Public License
20 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include <sys/socket.h>
29 #include "bus-creds.h"
30 #include "bus-protocol.h"
32 #include "time-util.h"
34 struct bus_container {
38 /* Indexes into the signature string */
39 unsigned index, saved_index;
42 size_t before, begin, end;
44 /* dbus1: pointer to the array size value, if this is a value */
47 /* gvariant: list of offsets to end of children if this is struct/dict entry/array */
48 size_t *offsets, n_offsets, offsets_allocated, offset_index;
51 char *peeked_signature;
54 struct bus_body_part {
55 struct bus_body_part *next;
61 uint64_t memfd_offset;
69 struct sd_bus_message {
74 uint64_t reply_cookie;
77 const char *interface;
79 const char *destination;
90 uint64_t verify_destination_id;
99 /* The first and last bytes of the message */
100 struct bus_header *header;
103 /* How many bytes are accessible in the above pointers */
104 size_t header_accessible;
105 size_t footer_accessible;
109 size_t user_body_size;
111 struct bus_body_part body;
112 struct bus_body_part *body_end;
113 unsigned n_body_parts;
116 struct bus_body_part *cached_rindex_part;
117 size_t cached_rindex_part_begin;
122 struct bus_container root_container, *containers;
124 size_t containers_allocated;
127 struct iovec iovec_fixed[2];
130 char *peeked_signature;
132 /* If set replies to this message must carry the signature
133 * specified here to successfully seal. This is initialized
134 * from the vtable data */
135 const char *enforced_reply_signature;
139 char sender_buffer[3 + DECIMAL_STR_MAX(uint64_t) + 1];
140 char destination_buffer[3 + DECIMAL_STR_MAX(uint64_t) + 1];
141 char *destination_ptr;
143 size_t header_offsets[_BUS_MESSAGE_HEADER_MAX];
144 unsigned n_header_offsets;
147 static inline bool BUS_MESSAGE_NEED_BSWAP(sd_bus_message *m) {
148 return m->header->endian != BUS_NATIVE_ENDIAN;
151 static inline uint16_t BUS_MESSAGE_BSWAP16(sd_bus_message *m, uint16_t u) {
152 return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_16(u) : u;
155 static inline uint32_t BUS_MESSAGE_BSWAP32(sd_bus_message *m, uint32_t u) {
156 return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_32(u) : u;
159 static inline uint64_t BUS_MESSAGE_BSWAP64(sd_bus_message *m, uint64_t u) {
160 return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_64(u) : u;
163 static inline uint64_t BUS_MESSAGE_COOKIE(sd_bus_message *m) {
164 if (m->header->version == 2)
165 return BUS_MESSAGE_BSWAP64(m, m->header->dbus2.cookie);
167 return BUS_MESSAGE_BSWAP32(m, m->header->dbus1.serial);
170 static inline size_t BUS_MESSAGE_SIZE(sd_bus_message *m) {
172 sizeof(struct bus_header) +
173 ALIGN8(m->fields_size) +
177 static inline size_t BUS_MESSAGE_BODY_BEGIN(sd_bus_message *m) {
179 sizeof(struct bus_header) +
180 ALIGN8(m->fields_size);
183 static inline void* BUS_MESSAGE_FIELDS(sd_bus_message *m) {
184 return (uint8_t*) m->header + sizeof(struct bus_header);
187 static inline bool BUS_MESSAGE_IS_GVARIANT(sd_bus_message *m) {
188 return m->header->version == 2;
191 #if 0 /// UNNEEDED by elogind
192 int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz);
194 int bus_message_read_strv_extend(sd_bus_message *m, char ***l);
196 int bus_message_from_header(
199 size_t header_accessible,
201 size_t footer_accessible,
207 sd_bus_message **ret);
209 int bus_message_from_malloc(
216 sd_bus_message **ret);
218 int bus_message_get_arg(sd_bus_message *m, unsigned i, const char **str);
219 int bus_message_get_arg_strv(sd_bus_message *m, unsigned i, char ***strv);
221 int bus_message_parse_fields(sd_bus_message *m);
223 struct bus_body_part *message_append_part(sd_bus_message *m);
225 #define MESSAGE_FOREACH_PART(part, i, m) \
226 for ((i) = 0, (part) = &(m)->body; (i) < (m)->n_body_parts; (i)++, (part) = (part)->next)
228 int bus_body_part_map(struct bus_body_part *part);
229 void bus_body_part_unmap(struct bus_body_part *part);
231 int bus_message_to_errno(sd_bus_message *m);
233 int bus_message_new_synthetic_error(sd_bus *bus, uint64_t serial, const sd_bus_error *e, sd_bus_message **m);
235 int bus_message_remarshal(sd_bus *bus, sd_bus_message **m);
237 #if 0 /// UNNEEDED by elogind
238 int bus_message_append_sender(sd_bus_message *m, const char *sender);
241 void bus_message_set_sender_driver(sd_bus *bus, sd_bus_message *m);
242 void bus_message_set_sender_local(sd_bus *bus, sd_bus_message *m);