245 lines
7.0 KiB
C
245 lines
7.0 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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#pragma once
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/***
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This file is part of systemd.
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Copyright 2013 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <stdbool.h>
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#include <byteswap.h>
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#include <sys/socket.h>
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#include "macro.h"
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#include "sd-bus.h"
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#include "kdbus.h"
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#include "time-util.h"
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#include "bus-creds.h"
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#include "bus-protocol.h"
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struct bus_container {
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char enclosing;
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bool need_offsets:1;
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/* Indexes into the signature string */
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unsigned index, saved_index;
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char *signature;
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size_t before, begin, end;
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/* dbus1: pointer to the array size value, if this is a value */
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uint32_t *array_size;
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/* gvariant: list of offsets to end of children if this is struct/dict entry/array */
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size_t *offsets, n_offsets, offsets_allocated, offset_index;
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size_t item_size;
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char *peeked_signature;
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};
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struct bus_header {
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uint8_t endian;
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uint8_t type;
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uint8_t flags;
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uint8_t version;
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uint32_t body_size;
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/* Note that what the bus spec calls "serial" we'll call
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"cookie" instead, because we don't want to imply that the
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cookie was in any way monotonically increasing. */
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uint32_t serial;
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uint32_t fields_size;
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} _packed_;
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struct bus_body_part {
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struct bus_body_part *next;
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void *data;
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size_t size;
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size_t mapped;
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size_t allocated;
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int memfd;
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bool free_this:1;
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bool munmap_this:1;
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bool sealed:1;
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bool is_zero:1;
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};
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struct sd_bus_message {
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unsigned n_ref;
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sd_bus *bus;
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uint32_t reply_cookie;
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const char *path;
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const char *interface;
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const char *member;
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const char *destination;
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const char *sender;
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sd_bus_error error;
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sd_bus_creds creds;
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usec_t monotonic;
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usec_t realtime;
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bool sealed:1;
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bool dont_send:1;
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bool allow_fds:1;
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bool free_header:1;
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bool free_kdbus:1;
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bool free_fds:1;
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bool release_kdbus:1;
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bool poisoned:1;
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struct bus_header *header;
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struct bus_body_part body;
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struct bus_body_part *body_end;
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unsigned n_body_parts;
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size_t rindex;
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struct bus_body_part *cached_rindex_part;
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size_t cached_rindex_part_begin;
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uint32_t n_fds;
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int *fds;
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struct bus_container root_container, *containers;
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unsigned n_containers;
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size_t containers_allocated;
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struct iovec *iovec;
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struct iovec iovec_fixed[2];
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unsigned n_iovec;
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struct kdbus_msg *kdbus;
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char *peeked_signature;
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/* If set replies to this message must carry the signature
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* specified here to successfully seal. This is initialized
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* from the vtable data */
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const char *enforced_reply_signature;
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usec_t timeout;
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char sender_buffer[3 + DECIMAL_STR_MAX(uint64_t) + 1];
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char destination_buffer[3 + DECIMAL_STR_MAX(uint64_t) + 1];
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size_t header_offsets[_BUS_MESSAGE_HEADER_MAX];
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unsigned n_header_offsets;
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};
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#define BUS_MESSAGE_NEED_BSWAP(m) ((m)->header->endian != BUS_NATIVE_ENDIAN)
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static inline uint16_t BUS_MESSAGE_BSWAP16(sd_bus_message *m, uint16_t u) {
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return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_16(u) : u;
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}
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static inline uint32_t BUS_MESSAGE_BSWAP32(sd_bus_message *m, uint32_t u) {
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return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_32(u) : u;
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}
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static inline uint64_t BUS_MESSAGE_BSWAP64(sd_bus_message *m, uint64_t u) {
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return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_64(u) : u;
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}
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static inline uint32_t BUS_MESSAGE_COOKIE(sd_bus_message *m) {
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return BUS_MESSAGE_BSWAP32(m, m->header->serial);
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}
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static inline uint32_t BUS_MESSAGE_BODY_SIZE(sd_bus_message *m) {
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return BUS_MESSAGE_BSWAP32(m, m->header->body_size);
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}
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static inline uint32_t BUS_MESSAGE_FIELDS_SIZE(sd_bus_message *m) {
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return BUS_MESSAGE_BSWAP32(m, m->header->fields_size);
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}
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static inline uint32_t BUS_MESSAGE_SIZE(sd_bus_message *m) {
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return
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sizeof(struct bus_header) +
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ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m)) +
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BUS_MESSAGE_BODY_SIZE(m);
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}
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static inline uint32_t BUS_MESSAGE_BODY_BEGIN(sd_bus_message *m) {
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return
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sizeof(struct bus_header) +
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ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m));
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}
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static inline void* BUS_MESSAGE_FIELDS(sd_bus_message *m) {
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return (uint8_t*) m->header + sizeof(struct bus_header);
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}
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static inline bool BUS_MESSAGE_IS_GVARIANT(sd_bus_message *m) {
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return m->header->version == 2;
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}
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int bus_message_seal(sd_bus_message *m, uint64_t serial, usec_t timeout);
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int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz);
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int bus_message_read_strv_extend(sd_bus_message *m, char ***l);
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int bus_message_from_header(
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sd_bus *bus,
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void *header,
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size_t length,
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int *fds,
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unsigned n_fds,
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const struct ucred *ucred,
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const char *label,
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size_t extra,
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sd_bus_message **ret);
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int bus_message_from_malloc(
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sd_bus *bus,
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void *buffer,
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size_t length,
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int *fds,
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unsigned n_fds,
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const struct ucred *ucred,
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const char *label,
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sd_bus_message **ret);
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const char* bus_message_get_arg(sd_bus_message *m, unsigned i);
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int bus_message_append_ap(sd_bus_message *m, const char *types, va_list ap);
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int bus_message_parse_fields(sd_bus_message *m);
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bool bus_header_is_complete(struct bus_header *h, size_t size);
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int bus_header_message_size(struct bus_header *h, size_t *sum);
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struct bus_body_part *message_append_part(sd_bus_message *m);
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#define MESSAGE_FOREACH_PART(part, i, m) \
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for ((i) = 0, (part) = &(m)->body; (i) < (m)->n_body_parts; (i)++, (part) = (part)->next)
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int bus_body_part_map(struct bus_body_part *part);
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void bus_body_part_unmap(struct bus_body_part *part);
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int bus_message_to_errno(sd_bus_message *m);
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int bus_message_new_synthetic_error(sd_bus *bus, uint64_t serial, const sd_bus_error *e, sd_bus_message **m);
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int bus_message_remarshal(sd_bus *bus, sd_bus_message **m);
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int bus_message_append_sender(sd_bus_message *m, const char *sender);
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