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;
52 char *peeked_signature;
65 struct bus_body_part {
66 struct bus_body_part *next;
78 struct sd_bus_message {
83 uint32_t reply_serial;
86 const char *interface;
88 const char *destination;
104 bool release_kdbus:1;
107 struct bus_header *header;
108 struct bus_body_part body;
109 struct bus_body_part *body_end;
110 unsigned n_body_parts;
113 struct bus_body_part *cached_rindex_part;
114 size_t cached_rindex_part_begin;
119 struct bus_container root_container, *containers;
120 unsigned n_containers;
121 size_t containers_allocated;
124 struct iovec iovec_fixed[2];
127 struct kdbus_msg *kdbus;
129 char *peeked_signature;
131 /* If set replies to this message must carry the signature
132 * specified here to successfully seal. This is initialized
133 * from the vtable data */
134 const char *enforced_reply_signature;
138 char sender_buffer[3 + DECIMAL_STR_MAX(uint64_t) + 1];
139 char destination_buffer[3 + DECIMAL_STR_MAX(uint64_t) + 1];
141 size_t header_offsets[_BUS_MESSAGE_HEADER_MAX];
142 unsigned n_header_offsets;
145 #define BUS_MESSAGE_NEED_BSWAP(m) ((m)->header->endian != BUS_NATIVE_ENDIAN)
147 static inline uint16_t BUS_MESSAGE_BSWAP16(sd_bus_message *m, uint16_t u) {
148 return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_16(u) : u;
151 static inline uint32_t BUS_MESSAGE_BSWAP32(sd_bus_message *m, uint32_t u) {
152 return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_32(u) : u;
155 static inline uint64_t BUS_MESSAGE_BSWAP64(sd_bus_message *m, uint64_t u) {
156 return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_64(u) : u;
159 static inline uint32_t BUS_MESSAGE_SERIAL(sd_bus_message *m) {
160 return BUS_MESSAGE_BSWAP32(m, m->header->serial);
163 static inline uint32_t BUS_MESSAGE_BODY_SIZE(sd_bus_message *m) {
164 return BUS_MESSAGE_BSWAP32(m, m->header->body_size);
167 static inline uint32_t BUS_MESSAGE_FIELDS_SIZE(sd_bus_message *m) {
168 return BUS_MESSAGE_BSWAP32(m, m->header->fields_size);
171 static inline uint32_t BUS_MESSAGE_SIZE(sd_bus_message *m) {
173 sizeof(struct bus_header) +
174 ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m)) +
175 BUS_MESSAGE_BODY_SIZE(m);
178 static inline uint32_t BUS_MESSAGE_BODY_BEGIN(sd_bus_message *m) {
180 sizeof(struct bus_header) +
181 ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m));
184 static inline void* BUS_MESSAGE_FIELDS(sd_bus_message *m) {
185 return (uint8_t*) m->header + sizeof(struct bus_header);
188 static inline bool BUS_MESSAGE_IS_GVARIANT(sd_bus_message *m) {
189 return m->header->version == 2;
192 int bus_message_seal(sd_bus_message *m, uint64_t serial, usec_t timeout);
193 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(
202 const struct ucred *ucred,
205 sd_bus_message **ret);
207 int bus_message_from_malloc(
213 const struct ucred *ucred,
215 sd_bus_message **ret);
217 const char* bus_message_get_arg(sd_bus_message *m, unsigned i);
219 int bus_message_append_ap(sd_bus_message *m, const char *types, va_list ap);
221 int bus_message_parse_fields(sd_bus_message *m);
223 bool bus_header_is_complete(struct bus_header *h, size_t size);
224 int bus_header_message_size(struct bus_header *h, size_t *sum);
226 struct bus_body_part *message_append_part(sd_bus_message *m);
228 #define MESSAGE_FOREACH_PART(part, i, m) \
229 for ((i) = 0, (part) = &(m)->body; (i) < (m)->n_body_parts; (i)++, (part) = (part)->next)
231 int bus_body_part_map(struct bus_body_part *part);
232 void bus_body_part_unmap(struct bus_body_part *part);
234 int bus_message_to_errno(sd_bus_message *m);
236 int bus_message_new_synthetic_error(sd_bus *bus, uint64_t serial, const sd_bus_error *e, sd_bus_message **m);
238 int bus_message_remarshal(sd_bus *bus, sd_bus_message **m);
240 int bus_message_append_sender(sd_bus_message *m, const char *sender);