1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
6 This file is part of systemd.
8 Copyright 2013 Lennart Poettering
10 systemd is free software; you can redistribute it and/or modify it
11 under the terms of the GNU Lesser General Public License as published by
12 the Free Software Foundation; either version 2.1 of the License, or
13 (at your option) any later version.
15 systemd is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public License
21 along with systemd; If not, see <http://www.gnu.org/licenses/>.
26 #include <sys/socket.h>
31 #include "time-util.h"
32 #include "bus-creds.h"
33 #include "bus-protocol.h"
35 struct bus_container {
39 /* Indexes into the signature string */
40 unsigned index, saved_index;
43 size_t before, begin, end;
45 /* dbus1: pointer to the array size value, if this is a value */
48 /* gvariant: list of offsets to end of children if this is struct/dict entry/array */
49 size_t *offsets, n_offsets, offsets_allocated, offset_index;
63 struct bus_body_part {
64 struct bus_body_part *next;
76 struct sd_bus_message {
81 uint32_t reply_serial;
84 const char *interface;
86 const char *destination;
102 bool release_kdbus:1;
105 struct bus_header *header;
106 struct bus_body_part body;
107 struct bus_body_part *body_end;
108 unsigned n_body_parts;
111 struct bus_body_part *cached_rindex_part;
112 size_t cached_rindex_part_begin;
117 struct bus_container root_container, *containers;
118 unsigned n_containers;
119 size_t containers_allocated;
122 struct iovec iovec_fixed[2];
125 struct kdbus_msg *kdbus;
127 char *peeked_signature;
129 /* If set replies to this message must carry the signature
130 * specified here to successfully seal. This is initialized
131 * from the vtable data */
132 const char *enforced_reply_signature;
136 char sender_buffer[3 + DECIMAL_STR_MAX(uint64_t) + 1];
137 char destination_buffer[3 + DECIMAL_STR_MAX(uint64_t) + 1];
139 size_t header_offsets[_BUS_MESSAGE_HEADER_MAX];
140 unsigned n_header_offsets;
143 #define BUS_MESSAGE_NEED_BSWAP(m) ((m)->header->endian != BUS_NATIVE_ENDIAN)
145 static inline uint16_t BUS_MESSAGE_BSWAP16(sd_bus_message *m, uint16_t u) {
146 return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_16(u) : u;
149 static inline uint32_t BUS_MESSAGE_BSWAP32(sd_bus_message *m, uint32_t u) {
150 return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_32(u) : u;
153 static inline uint64_t BUS_MESSAGE_BSWAP64(sd_bus_message *m, uint64_t u) {
154 return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_64(u) : u;
157 static inline uint32_t BUS_MESSAGE_SERIAL(sd_bus_message *m) {
158 return BUS_MESSAGE_BSWAP32(m, m->header->serial);
161 static inline uint32_t BUS_MESSAGE_BODY_SIZE(sd_bus_message *m) {
162 return BUS_MESSAGE_BSWAP32(m, m->header->body_size);
165 static inline uint32_t BUS_MESSAGE_FIELDS_SIZE(sd_bus_message *m) {
166 return BUS_MESSAGE_BSWAP32(m, m->header->fields_size);
169 static inline uint32_t BUS_MESSAGE_SIZE(sd_bus_message *m) {
171 sizeof(struct bus_header) +
172 ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m)) +
173 BUS_MESSAGE_BODY_SIZE(m);
176 static inline uint32_t BUS_MESSAGE_BODY_BEGIN(sd_bus_message *m) {
178 sizeof(struct bus_header) +
179 ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m));
182 static inline void* BUS_MESSAGE_FIELDS(sd_bus_message *m) {
183 return (uint8_t*) m->header + sizeof(struct bus_header);
186 static inline bool BUS_MESSAGE_IS_GVARIANT(sd_bus_message *m) {
187 return m->header->version == 2;
190 int bus_message_seal(sd_bus_message *m, uint64_t serial, usec_t timeout);
191 int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz);
192 int bus_message_read_strv_extend(sd_bus_message *m, char ***l);
194 int bus_message_from_header(
200 const struct ucred *ucred,
203 sd_bus_message **ret);
205 int bus_message_from_malloc(
211 const struct ucred *ucred,
213 sd_bus_message **ret);
215 const char* bus_message_get_arg(sd_bus_message *m, unsigned i);
217 int bus_message_append_ap(sd_bus_message *m, const char *types, va_list ap);
219 int bus_message_parse_fields(sd_bus_message *m);
221 bool bus_header_is_complete(struct bus_header *h, size_t size);
222 int bus_header_message_size(struct bus_header *h, size_t *sum);
224 struct bus_body_part *message_append_part(sd_bus_message *m);
226 #define MESSAGE_FOREACH_PART(part, i, m) \
227 for ((i) = 0, (part) = &(m)->body; (i) < (m)->n_body_parts; (i)++, (part) = (part)->next)
229 int bus_body_part_map(struct bus_body_part *part);
230 void bus_body_part_unmap(struct bus_body_part *part);
232 int bus_message_to_errno(sd_bus_message *m);
234 int bus_message_new_synthetic_error(sd_bus *bus, uint64_t serial, const sd_bus_error *e, sd_bus_message **m);
236 int bus_message_remarshal(sd_bus *bus, sd_bus_message **m);