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, n_offsets_allocated, offset_index;
63 struct bus_body_part {
64 struct bus_body_part *next;
75 struct sd_bus_message {
80 uint32_t reply_serial;
83 const char *interface;
85 const char *destination;
101 bool release_kdbus:1;
104 struct bus_header *header;
105 struct bus_body_part body;
106 struct bus_body_part *body_end;
107 unsigned n_body_parts;
110 struct bus_body_part *cached_rindex_part;
111 size_t cached_rindex_part_begin;
116 struct bus_container root_container, *containers;
117 unsigned n_containers;
120 struct iovec iovec_fixed[2];
123 struct kdbus_msg *kdbus;
125 char *peeked_signature;
127 /* If set replies to this message must carry the signature
128 * specified here to successfully seal. This is initialized
129 * from the vtable data */
130 const char *enforced_reply_signature;
134 char sender_buffer[3 + DECIMAL_STR_MAX(uint64_t) + 1];
135 char destination_buffer[3 + DECIMAL_STR_MAX(uint64_t) + 1];
137 size_t header_offsets[_BUS_MESSAGE_HEADER_MAX];
138 unsigned n_header_offsets;
141 #define BUS_MESSAGE_NEED_BSWAP(m) ((m)->header->endian != BUS_NATIVE_ENDIAN)
143 static inline uint16_t BUS_MESSAGE_BSWAP16(sd_bus_message *m, uint16_t u) {
144 return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_16(u) : u;
147 static inline uint32_t BUS_MESSAGE_BSWAP32(sd_bus_message *m, uint32_t u) {
148 return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_32(u) : u;
151 static inline uint64_t BUS_MESSAGE_BSWAP64(sd_bus_message *m, uint64_t u) {
152 return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_64(u) : u;
155 static inline uint32_t BUS_MESSAGE_SERIAL(sd_bus_message *m) {
156 return BUS_MESSAGE_BSWAP32(m, m->header->serial);
159 static inline uint32_t BUS_MESSAGE_BODY_SIZE(sd_bus_message *m) {
160 return BUS_MESSAGE_BSWAP32(m, m->header->body_size);
163 static inline uint32_t BUS_MESSAGE_FIELDS_SIZE(sd_bus_message *m) {
164 return BUS_MESSAGE_BSWAP32(m, m->header->fields_size);
167 static inline uint32_t BUS_MESSAGE_SIZE(sd_bus_message *m) {
169 sizeof(struct bus_header) +
170 ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m)) +
171 BUS_MESSAGE_BODY_SIZE(m);
174 static inline uint32_t BUS_MESSAGE_BODY_BEGIN(sd_bus_message *m) {
176 sizeof(struct bus_header) +
177 ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m));
180 static inline void* BUS_MESSAGE_FIELDS(sd_bus_message *m) {
181 return (uint8_t*) m->header + sizeof(struct bus_header);
184 static inline bool BUS_MESSAGE_IS_GVARIANT(sd_bus_message *m) {
185 return m->header->version == 2;
188 int bus_message_seal(sd_bus_message *m, uint64_t serial);
189 int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz);
190 int bus_message_read_strv_extend(sd_bus_message *m, char ***l);
192 int bus_message_from_header(
198 const struct ucred *ucred,
201 sd_bus_message **ret);
203 int bus_message_from_malloc(
209 const struct ucred *ucred,
211 sd_bus_message **ret);
213 const char* bus_message_get_arg(sd_bus_message *m, unsigned i);
215 int bus_message_append_ap(sd_bus_message *m, const char *types, va_list ap);
217 int bus_message_parse_fields(sd_bus_message *m);
219 bool bus_header_is_complete(struct bus_header *h, size_t size);
220 int bus_header_message_size(struct bus_header *h, size_t *sum);
222 struct bus_body_part *message_append_part(sd_bus_message *m);
224 #define MESSAGE_FOREACH_PART(part, i, m) \
225 for ((i) = 0, (part) = &(m)->body; (i) < (m)->n_body_parts; (i)++, (part) = (part)->next)
227 int bus_body_part_map(struct bus_body_part *part);
228 void bus_body_part_unmap(struct bus_body_part *part);
230 int bus_message_to_errno(sd_bus_message *m);
232 int bus_message_new_synthetic_error(sd_bus *bus, uint64_t serial, const sd_bus_error *e, sd_bus_message **m);