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 {
38 unsigned index, saved_index;
46 size_t n_offsets, n_allocated;
61 struct bus_body_part {
62 struct bus_body_part *next;
73 struct sd_bus_message {
78 uint32_t reply_serial;
81 const char *interface;
83 const char *destination;
103 struct bus_header *header;
104 struct bus_body_part body;
105 struct bus_body_part *body_end;
106 unsigned n_body_parts;
109 struct bus_body_part *cached_rindex_part;
110 size_t cached_rindex_part_begin;
115 struct bus_container root_container, *containers;
116 unsigned n_containers;
119 struct iovec iovec_fixed[2];
122 struct kdbus_msg *kdbus;
124 char *peeked_signature;
126 /* If set replies to this message must carry the signature
127 * specified here to successfully seal. This is initialized
128 * from the vtable data */
129 const char *enforced_reply_signature;
133 char sender_buffer[3 + DECIMAL_STR_MAX(uint64_t) + 1];
134 char destination_buffer[3 + DECIMAL_STR_MAX(uint64_t) + 1];
136 size_t header_offsets[_BUS_MESSAGE_HEADER_MAX];
137 unsigned n_header_offsets;
140 #define BUS_MESSAGE_NEED_BSWAP(m) ((m)->header->endian != BUS_NATIVE_ENDIAN)
142 static inline uint16_t BUS_MESSAGE_BSWAP16(sd_bus_message *m, uint16_t u) {
143 return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_16(u) : u;
146 static inline uint32_t BUS_MESSAGE_BSWAP32(sd_bus_message *m, uint32_t u) {
147 return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_32(u) : u;
150 static inline uint64_t BUS_MESSAGE_BSWAP64(sd_bus_message *m, uint64_t u) {
151 return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_64(u) : u;
154 static inline uint32_t BUS_MESSAGE_SERIAL(sd_bus_message *m) {
155 return BUS_MESSAGE_BSWAP32(m, m->header->serial);
158 static inline uint32_t BUS_MESSAGE_BODY_SIZE(sd_bus_message *m) {
159 return BUS_MESSAGE_BSWAP32(m, m->header->body_size);
162 static inline uint32_t BUS_MESSAGE_FIELDS_SIZE(sd_bus_message *m) {
163 return BUS_MESSAGE_BSWAP32(m, m->header->fields_size);
166 static inline uint32_t BUS_MESSAGE_SIZE(sd_bus_message *m) {
168 sizeof(struct bus_header) +
169 ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m)) +
170 BUS_MESSAGE_BODY_SIZE(m);
173 static inline uint32_t BUS_MESSAGE_BODY_BEGIN(sd_bus_message *m) {
175 sizeof(struct bus_header) +
176 ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m));
179 static inline void* BUS_MESSAGE_FIELDS(sd_bus_message *m) {
180 return (uint8_t*) m->header + sizeof(struct bus_header);
183 int bus_message_seal(sd_bus_message *m, uint64_t serial);
184 int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz);
185 int bus_message_read_strv_extend(sd_bus_message *m, char ***l);
187 int bus_message_from_header(
193 const struct ucred *ucred,
196 sd_bus_message **ret);
198 int bus_message_from_malloc(
204 const struct ucred *ucred,
206 sd_bus_message **ret);
208 const char* bus_message_get_arg(sd_bus_message *m, unsigned i);
210 int bus_message_append_ap(sd_bus_message *m, const char *types, va_list ap);
212 int bus_message_parse_fields(sd_bus_message *m);
214 bool bus_header_is_complete(struct bus_header *h, size_t size);
215 int bus_header_message_size(struct bus_header *h, size_t *sum);
217 struct bus_body_part *message_append_part(sd_bus_message *m);
219 #define MESSAGE_FOREACH_PART(part, i, m) \
220 for ((i) = 0, (part) = &(m)->body; (i) < (m)->n_body_parts; (i)++, (part) = (part)->next)
222 int bus_body_part_map(struct bus_body_part *part);
223 void bus_body_part_unmap(struct bus_body_part *part);
225 int bus_message_to_errno(sd_bus_message *m);
227 int bus_message_new_synthetic_error(sd_bus *bus, uint64_t serial, const sd_bus_error *e, sd_bus_message **m);