1 /* SPDX-License-Identifier: LGPL-2.1+ */
5 This file is part of systemd.
7 Copyright 2013 Lennart Poettering
12 #include <sys/socket.h>
16 #include "bus-creds.h"
17 #include "bus-protocol.h"
19 #include "time-util.h"
21 struct bus_container {
25 /* Indexes into the signature string */
26 unsigned index, saved_index;
29 size_t before, begin, end;
31 /* dbus1: pointer to the array size value, if this is a value */
34 /* gvariant: list of offsets to end of children if this is struct/dict entry/array */
35 size_t *offsets, n_offsets, offsets_allocated, offset_index;
38 char *peeked_signature;
41 struct bus_body_part {
42 struct bus_body_part *next;
48 uint64_t memfd_offset;
56 struct sd_bus_message {
61 uint64_t reply_cookie;
64 const char *interface;
66 const char *destination;
77 uint64_t verify_destination_id;
86 /* The first and last bytes of the message */
87 struct bus_header *header;
90 /* How many bytes are accessible in the above pointers */
91 size_t header_accessible;
92 size_t footer_accessible;
96 size_t user_body_size;
98 struct bus_body_part body;
99 struct bus_body_part *body_end;
100 unsigned n_body_parts;
103 struct bus_body_part *cached_rindex_part;
104 size_t cached_rindex_part_begin;
109 struct bus_container root_container, *containers;
111 size_t containers_allocated;
114 struct iovec iovec_fixed[2];
117 char *peeked_signature;
119 /* If set replies to this message must carry the signature
120 * specified here to successfully seal. This is initialized
121 * from the vtable data */
122 const char *enforced_reply_signature;
126 size_t header_offsets[_BUS_MESSAGE_HEADER_MAX];
127 unsigned n_header_offsets;
130 static inline bool BUS_MESSAGE_NEED_BSWAP(sd_bus_message *m) {
131 return m->header->endian != BUS_NATIVE_ENDIAN;
134 static inline uint16_t BUS_MESSAGE_BSWAP16(sd_bus_message *m, uint16_t u) {
135 return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_16(u) : u;
138 static inline uint32_t BUS_MESSAGE_BSWAP32(sd_bus_message *m, uint32_t u) {
139 return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_32(u) : u;
142 static inline uint64_t BUS_MESSAGE_BSWAP64(sd_bus_message *m, uint64_t u) {
143 return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_64(u) : u;
146 static inline uint64_t BUS_MESSAGE_COOKIE(sd_bus_message *m) {
147 if (m->header->version == 2)
148 return BUS_MESSAGE_BSWAP64(m, m->header->dbus2.cookie);
150 return BUS_MESSAGE_BSWAP32(m, m->header->dbus1.serial);
153 static inline size_t BUS_MESSAGE_SIZE(sd_bus_message *m) {
155 sizeof(struct bus_header) +
156 ALIGN8(m->fields_size) +
160 static inline size_t BUS_MESSAGE_BODY_BEGIN(sd_bus_message *m) {
162 sizeof(struct bus_header) +
163 ALIGN8(m->fields_size);
166 static inline void* BUS_MESSAGE_FIELDS(sd_bus_message *m) {
167 return (uint8_t*) m->header + sizeof(struct bus_header);
170 static inline bool BUS_MESSAGE_IS_GVARIANT(sd_bus_message *m) {
171 return m->header->version == 2;
174 #if 0 /// UNNEEDED by elogind
175 int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz);
177 int bus_message_read_strv_extend(sd_bus_message *m, char ***l);
179 int bus_message_from_header(
182 size_t header_accessible,
184 size_t footer_accessible,
190 sd_bus_message **ret);
192 int bus_message_from_malloc(
199 sd_bus_message **ret);
201 int bus_message_get_arg(sd_bus_message *m, unsigned i, const char **str);
202 int bus_message_get_arg_strv(sd_bus_message *m, unsigned i, char ***strv);
204 int bus_message_parse_fields(sd_bus_message *m);
206 struct bus_body_part *message_append_part(sd_bus_message *m);
208 #define MESSAGE_FOREACH_PART(part, i, m) \
209 for ((i) = 0, (part) = &(m)->body; (i) < (m)->n_body_parts; (i)++, (part) = (part)->next)
211 int bus_body_part_map(struct bus_body_part *part);
212 void bus_body_part_unmap(struct bus_body_part *part);
214 int bus_message_to_errno(sd_bus_message *m);
216 int bus_message_new_synthetic_error(sd_bus *bus, uint64_t serial, const sd_bus_error *e, sd_bus_message **m);
218 int bus_message_remarshal(sd_bus *bus, sd_bus_message **m);
220 #if 0 /// UNNEEDED by elogind
221 int bus_message_append_sender(sd_bus_message *m, const char *sender);
224 void bus_message_set_sender_driver(sd_bus *bus, sd_bus_message *m);
225 void bus_message_set_sender_local(sd_bus *bus, sd_bus_message *m);