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