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Diffstat (limited to 'src/libsystemd-bus/bus-message.h')
| -rw-r--r-- | src/libsystemd-bus/bus-message.h | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/src/libsystemd-bus/bus-message.h b/src/libsystemd-bus/bus-message.h new file mode 100644 index 0000000000..9c0829c7fa --- /dev/null +++ b/src/libsystemd-bus/bus-message.h @@ -0,0 +1,198 @@ +/*-*- 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" + +struct bus_container { + char enclosing; + + char *signature; + unsigned index; + + uint32_t *array_size; + size_t 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 sd_bus_message { + unsigned n_ref; + + uint32_t reply_serial; + + const char *path; + const char *interface; + const char *member; + const char *destination; + const char *sender; + + sd_bus_error error; + + uid_t uid; + gid_t gid; + pid_t pid; + pid_t tid; + usec_t pid_starttime; + usec_t monotonic; + usec_t realtime; + + bool sealed:1; + bool dont_send:1; + bool allow_fds:1; + bool uid_valid:1; + bool gid_valid:1; + bool free_header:1; + bool free_fields:1; + bool free_body:1; + bool free_kdbus:1; + bool free_fds:1; + + struct bus_header *header; + void *fields; + void *body; + struct kdbus_msg *kdbus; + + char *label; + + size_t rindex; + + uint32_t n_fds; + int *fds; + + struct bus_container root_container, *containers; + unsigned n_containers; + + struct iovec iovec[3]; + unsigned n_iovec; + + char *peeked_signature; + + usec_t timeout; + + char sender_buffer[3 + DECIMAL_STR_MAX(uint64_t) + 1]; + char destination_buffer[3 + DECIMAL_STR_MAX(uint64_t) + 1]; + + const char *exe; + const char *comm; + const char *tid_comm; + const char *cgroup; + + const char *cmdline; + size_t cmdline_length; + char **cmdline_array; + + char *session; + char *unit; + char *user_unit; + + struct kdbus_audit *audit; + + uint8_t *capability; + size_t capability_size; +}; + +#define BUS_MESSAGE_NEED_BSWAP(m) ((m)->header->endian != SD_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 void bus_message_unrefp(sd_bus_message **m) { + sd_bus_message_unref(*m); +} + +#define _cleanup_bus_message_unref_ __attribute__((cleanup(bus_message_unrefp))) + +int bus_message_seal(sd_bus_message *m, uint64_t serial); +int bus_message_dump(sd_bus_message *m); +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( + 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( + 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); + +int bus_header_size(struct bus_header *h, size_t *sum); |