/*-*- 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 . ***/ #include #include #include #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; bool need_offsets:1; /* Indexes into the signature string */ unsigned index, saved_index; char *signature; size_t before, begin, end; /* dbus1: pointer to the array size value, if this is a value */ uint32_t *array_size; /* gvariant: list of offsets to end of children if this is struct/dict entry/array */ size_t *offsets, n_offsets, offsets_allocated, offset_index; size_t item_size; char *peeked_signature; }; struct bus_header { uint8_t endian; uint8_t type; uint8_t flags; uint8_t version; uint32_t body_size; /* Note that what the bus spec calls "serial" we'll call "cookie" instead, because we don't want to imply that the cookie was in any way monotonically increasing. */ 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; size_t allocated; 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_cookie; 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; uint64_t seqnum; 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; size_t containers_allocated; 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]; size_t header_offsets[_BUS_MESSAGE_HEADER_MAX]; unsigned n_header_offsets; }; #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_COOKIE(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); } static inline bool BUS_MESSAGE_IS_GVARIANT(sd_bus_message *m) { return m->header->version == 2; } int bus_message_seal(sd_bus_message *m, uint64_t serial, usec_t timeout); 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); int bus_message_remarshal(sd_bus *bus, sd_bus_message **m); int bus_message_append_sender(sd_bus_message *m, const char *sender);