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;
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;
118 size_t containers_allocated;
121 struct iovec iovec_fixed[2];
124 struct kdbus_msg *kdbus;
126 char *peeked_signature;
128 /* If set replies to this message must carry the signature
129 * specified here to successfully seal. This is initialized
130 * from the vtable data */
131 const char *enforced_reply_signature;
135 char sender_buffer[3 + DECIMAL_STR_MAX(uint64_t) + 1];
136 char destination_buffer[3 + DECIMAL_STR_MAX(uint64_t) + 1];
138 size_t header_offsets[_BUS_MESSAGE_HEADER_MAX];
139 unsigned n_header_offsets;
142 #define BUS_MESSAGE_NEED_BSWAP(m) ((m)->header->endian != BUS_NATIVE_ENDIAN)
144 static inline uint16_t BUS_MESSAGE_BSWAP16(sd_bus_message *m, uint16_t u) {
145 return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_16(u) : u;
148 static inline uint32_t BUS_MESSAGE_BSWAP32(sd_bus_message *m, uint32_t u) {
149 return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_32(u) : u;
152 static inline uint64_t BUS_MESSAGE_BSWAP64(sd_bus_message *m, uint64_t u) {
153 return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_64(u) : u;
156 static inline uint32_t BUS_MESSAGE_SERIAL(sd_bus_message *m) {
157 return BUS_MESSAGE_BSWAP32(m, m->header->serial);
160 static inline uint32_t BUS_MESSAGE_BODY_SIZE(sd_bus_message *m) {
161 return BUS_MESSAGE_BSWAP32(m, m->header->body_size);
164 static inline uint32_t BUS_MESSAGE_FIELDS_SIZE(sd_bus_message *m) {
165 return BUS_MESSAGE_BSWAP32(m, m->header->fields_size);
168 static inline uint32_t BUS_MESSAGE_SIZE(sd_bus_message *m) {
170 sizeof(struct bus_header) +
171 ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m)) +
172 BUS_MESSAGE_BODY_SIZE(m);
175 static inline uint32_t BUS_MESSAGE_BODY_BEGIN(sd_bus_message *m) {
177 sizeof(struct bus_header) +
178 ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m));
181 static inline void* BUS_MESSAGE_FIELDS(sd_bus_message *m) {
182 return (uint8_t*) m->header + sizeof(struct bus_header);
185 static inline bool BUS_MESSAGE_IS_GVARIANT(sd_bus_message *m) {
186 return m->header->version == 2;
189 int bus_message_seal(sd_bus_message *m, uint64_t serial, usec_t timeout);
190 int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz);
191 int bus_message_read_strv_extend(sd_bus_message *m, char ***l);
193 int bus_message_from_header(
199 const struct ucred *ucred,
202 sd_bus_message **ret);
204 int bus_message_from_malloc(
210 const struct ucred *ucred,
212 sd_bus_message **ret);
214 const char* bus_message_get_arg(sd_bus_message *m, unsigned i);
216 int bus_message_append_ap(sd_bus_message *m, const char *types, va_list ap);
218 int bus_message_parse_fields(sd_bus_message *m);
220 bool bus_header_is_complete(struct bus_header *h, size_t size);
221 int bus_header_message_size(struct bus_header *h, size_t *sum);
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);