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de1c301e LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | #pragma once | |
4 | ||
5 | /*** | |
6 | This file is part of systemd. | |
7 | ||
8 | Copyright 2013 Lennart Poettering | |
9 | ||
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. | |
14 | ||
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. | |
19 | ||
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/>. | |
22 | ***/ | |
23 | ||
de1c301e | 24 | #include <byteswap.h> |
07630cea | 25 | #include <stdbool.h> |
2c35d880 | 26 | #include <sys/socket.h> |
de1c301e | 27 | |
de1c301e | 28 | #include "sd-bus.h" |
07630cea | 29 | |
5b12334d | 30 | #include "bus-creds.h" |
0461f8cd | 31 | #include "bus-protocol.h" |
07630cea LP |
32 | #include "macro.h" |
33 | #include "time-util.h" | |
de1c301e LP |
34 | |
35 | struct bus_container { | |
36 | char enclosing; | |
6647dc66 | 37 | bool need_offsets:1; |
de1c301e | 38 | |
6647dc66 | 39 | /* Indexes into the signature string */ |
b3af9646 | 40 | unsigned index, saved_index; |
453a0c29 LP |
41 | char *signature; |
42 | ||
6647dc66 | 43 | size_t before, begin, end; |
c1b9d935 | 44 | |
6647dc66 LP |
45 | /* dbus1: pointer to the array size value, if this is a value */ |
46 | uint32_t *array_size; | |
c1b9d935 | 47 | |
6647dc66 | 48 | /* gvariant: list of offsets to end of children if this is struct/dict entry/array */ |
306f07be | 49 | size_t *offsets, n_offsets, offsets_allocated, offset_index; |
6647dc66 | 50 | size_t item_size; |
3798fd4c LP |
51 | |
52 | char *peeked_signature; | |
de1c301e LP |
53 | }; |
54 | ||
bc7fd8cd | 55 | struct bus_body_part { |
453a0c29 | 56 | struct bus_body_part *next; |
bc7fd8cd | 57 | void *data; |
7dcd79c2 | 58 | void *mmap_begin; |
bc7fd8cd LP |
59 | size_t size; |
60 | size_t mapped; | |
8e959fbf | 61 | size_t allocated; |
7dcd79c2 | 62 | uint64_t memfd_offset; |
bc7fd8cd LP |
63 | int memfd; |
64 | bool free_this:1; | |
453a0c29 | 65 | bool munmap_this:1; |
bc7fd8cd | 66 | bool sealed:1; |
453a0c29 | 67 | bool is_zero:1; |
bc7fd8cd LP |
68 | }; |
69 | ||
de1c301e LP |
70 | struct sd_bus_message { |
71 | unsigned n_ref; | |
72 | ||
fd8d62d9 LP |
73 | sd_bus *bus; |
74 | ||
42c4ebcb | 75 | uint64_t reply_cookie; |
de1c301e LP |
76 | |
77 | const char *path; | |
78 | const char *interface; | |
79 | const char *member; | |
80 | const char *destination; | |
81 | const char *sender; | |
de1c301e LP |
82 | |
83 | sd_bus_error error; | |
84 | ||
5b12334d LP |
85 | sd_bus_creds creds; |
86 | ||
69aec65c LP |
87 | usec_t monotonic; |
88 | usec_t realtime; | |
6a0e376c | 89 | uint64_t seqnum; |
ca7b42c8 | 90 | int64_t priority; |
022fb855 | 91 | uint64_t verify_destination_id; |
de1c301e LP |
92 | |
93 | bool sealed:1; | |
2c93b4ef LP |
94 | bool dont_send:1; |
95 | bool allow_fds:1; | |
de1c301e | 96 | bool free_header:1; |
6629161f | 97 | bool free_kdbus:1; |
2c93b4ef | 98 | bool free_fds:1; |
fd8d62d9 | 99 | bool release_kdbus:1; |
bc7fd8cd | 100 | bool poisoned:1; |
de1c301e | 101 | |
2ac7c17f | 102 | /* The first and last bytes of the message */ |
de1c301e | 103 | struct bus_header *header; |
2ac7c17f LP |
104 | void *footer; |
105 | ||
106 | /* How many bytes are accessible in the above pointers */ | |
107 | size_t header_accessible; | |
108 | size_t footer_accessible; | |
109 | ||
110 | size_t fields_size; | |
111 | size_t body_size; | |
112 | size_t user_body_size; | |
113 | ||
bc7fd8cd LP |
114 | struct bus_body_part body; |
115 | struct bus_body_part *body_end; | |
116 | unsigned n_body_parts; | |
de1c301e | 117 | |
9a17484d | 118 | size_t rindex; |
bc7fd8cd LP |
119 | struct bus_body_part *cached_rindex_part; |
120 | size_t cached_rindex_part_begin; | |
9a17484d | 121 | |
de1c301e LP |
122 | uint32_t n_fds; |
123 | int *fds; | |
124 | ||
9a17484d | 125 | struct bus_container root_container, *containers; |
2ac7c17f | 126 | size_t n_containers; |
306f07be | 127 | size_t containers_allocated; |
de1c301e | 128 | |
bc7fd8cd | 129 | struct iovec *iovec; |
c91cb83c | 130 | struct iovec iovec_fixed[2]; |
de1c301e | 131 | unsigned n_iovec; |
9a17484d | 132 | |
bc7fd8cd LP |
133 | struct kdbus_msg *kdbus; |
134 | ||
9a17484d | 135 | char *peeked_signature; |
6629161f | 136 | |
6717d473 LP |
137 | /* If set replies to this message must carry the signature |
138 | * specified here to successfully seal. This is initialized | |
139 | * from the vtable data */ | |
140 | const char *enforced_reply_signature; | |
141 | ||
6629161f | 142 | usec_t timeout; |
51038c03 LP |
143 | |
144 | char sender_buffer[3 + DECIMAL_STR_MAX(uint64_t) + 1]; | |
145 | char destination_buffer[3 + DECIMAL_STR_MAX(uint64_t) + 1]; | |
022fb855 | 146 | char *destination_ptr; |
c1b9d935 LP |
147 | |
148 | size_t header_offsets[_BUS_MESSAGE_HEADER_MAX]; | |
149 | unsigned n_header_offsets; | |
de1c301e LP |
150 | }; |
151 | ||
2ac7c17f LP |
152 | static inline bool BUS_MESSAGE_NEED_BSWAP(sd_bus_message *m) { |
153 | return m->header->endian != BUS_NATIVE_ENDIAN; | |
154 | } | |
de1c301e | 155 | |
9a17484d LP |
156 | static inline uint16_t BUS_MESSAGE_BSWAP16(sd_bus_message *m, uint16_t u) { |
157 | return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_16(u) : u; | |
158 | } | |
159 | ||
160 | static inline uint32_t BUS_MESSAGE_BSWAP32(sd_bus_message *m, uint32_t u) { | |
de1c301e LP |
161 | return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_32(u) : u; |
162 | } | |
163 | ||
9a17484d LP |
164 | static inline uint64_t BUS_MESSAGE_BSWAP64(sd_bus_message *m, uint64_t u) { |
165 | return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_64(u) : u; | |
166 | } | |
167 | ||
42c4ebcb | 168 | static inline uint64_t BUS_MESSAGE_COOKIE(sd_bus_message *m) { |
2ac7c17f LP |
169 | if (m->header->version == 2) |
170 | return BUS_MESSAGE_BSWAP64(m, m->header->dbus2.cookie); | |
de1c301e | 171 | |
2ac7c17f | 172 | return BUS_MESSAGE_BSWAP32(m, m->header->dbus1.serial); |
de1c301e LP |
173 | } |
174 | ||
2ac7c17f | 175 | static inline size_t BUS_MESSAGE_SIZE(sd_bus_message *m) { |
6629161f LP |
176 | return |
177 | sizeof(struct bus_header) + | |
2ac7c17f LP |
178 | ALIGN8(m->fields_size) + |
179 | m->body_size; | |
6629161f LP |
180 | } |
181 | ||
2ac7c17f | 182 | static inline size_t BUS_MESSAGE_BODY_BEGIN(sd_bus_message *m) { |
c91cb83c LP |
183 | return |
184 | sizeof(struct bus_header) + | |
2ac7c17f | 185 | ALIGN8(m->fields_size); |
c91cb83c LP |
186 | } |
187 | ||
188 | static inline void* BUS_MESSAGE_FIELDS(sd_bus_message *m) { | |
189 | return (uint8_t*) m->header + sizeof(struct bus_header); | |
190 | } | |
191 | ||
6647dc66 LP |
192 | static inline bool BUS_MESSAGE_IS_GVARIANT(sd_bus_message *m) { |
193 | return m->header->version == 2; | |
194 | } | |
195 | ||
3df7a7e6 | 196 | int bus_message_seal(sd_bus_message *m, uint64_t serial, usec_t timeout); |
de1c301e | 197 | int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz); |
89ffcd2a | 198 | int bus_message_read_strv_extend(sd_bus_message *m, char ***l); |
2c93b4ef | 199 | |
6629161f | 200 | int bus_message_from_header( |
df2d202e | 201 | sd_bus *bus, |
6629161f | 202 | void *header, |
2ac7c17f LP |
203 | size_t header_accessible, |
204 | void *footer, | |
205 | size_t footer_accessible, | |
206 | size_t message_size, | |
6629161f LP |
207 | int *fds, |
208 | unsigned n_fds, | |
6629161f LP |
209 | const char *label, |
210 | size_t extra, | |
211 | sd_bus_message **ret); | |
212 | ||
2c93b4ef | 213 | int bus_message_from_malloc( |
df2d202e | 214 | sd_bus *bus, |
2c93b4ef LP |
215 | void *buffer, |
216 | size_t length, | |
217 | int *fds, | |
218 | unsigned n_fds, | |
2c93b4ef LP |
219 | const char *label, |
220 | sd_bus_message **ret); | |
392d5b37 | 221 | |
eccd47c5 LP |
222 | int bus_message_get_arg(sd_bus_message *m, unsigned i, const char **str); |
223 | int bus_message_get_arg_strv(sd_bus_message *m, unsigned i, char ***strv); | |
917b5dc7 LP |
224 | |
225 | int bus_message_append_ap(sd_bus_message *m, const char *types, va_list ap); | |
2100fa10 | 226 | |
6629161f LP |
227 | int bus_message_parse_fields(sd_bus_message *m); |
228 | ||
bc7fd8cd | 229 | struct bus_body_part *message_append_part(sd_bus_message *m); |
9b29bb68 LP |
230 | |
231 | #define MESSAGE_FOREACH_PART(part, i, m) \ | |
232 | for ((i) = 0, (part) = &(m)->body; (i) < (m)->n_body_parts; (i)++, (part) = (part)->next) | |
a392d361 LP |
233 | |
234 | int bus_body_part_map(struct bus_body_part *part); | |
235 | void bus_body_part_unmap(struct bus_body_part *part); | |
eb01ba5d LP |
236 | |
237 | int bus_message_to_errno(sd_bus_message *m); | |
238 | ||
239 | int bus_message_new_synthetic_error(sd_bus *bus, uint64_t serial, const sd_bus_error *e, sd_bus_message **m); | |
e1c433c6 LP |
240 | |
241 | int bus_message_remarshal(sd_bus *bus, sd_bus_message **m); | |
a7639e37 LP |
242 | |
243 | int bus_message_append_sender(sd_bus_message *m, const char *sender); | |
d29ae291 LP |
244 | |
245 | void bus_message_set_sender_driver(sd_bus *bus, sd_bus_message *m); | |
246 | void bus_message_set_sender_local(sd_bus *bus, sd_bus_message *m); |