+++ /dev/null
-/*
- * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
- * Julien Desfossez <julien.desfossez@polymtl.ca>
- * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program 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 General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-/*
- * This header is meant for liblttng and libust internal use ONLY. These
- * declarations should NOT be considered stable API.
- */
-
-#ifndef _LTTNG_SESSIOND_COMM_H
-#define _LTTNG_SESSIOND_COMM_H
-
-#include <limits.h>
-#include <lttng/lttng.h>
-#include <lttng/snapshot-internal.h>
-#include <lttng/save-internal.h>
-#include <lttng/channel-internal.h>
-#include <lttng/trigger/trigger-internal.h>
-#include <common/compat/socket.h>
-#include <common/uri.h>
-#include <common/defaults.h>
-#include <common/compat/uuid.h>
-
-#include <arpa/inet.h>
-#include <netinet/in.h>
-#include <sys/un.h>
-
-#include "inet.h"
-#include "inet6.h"
-#include <common/unix.h>
-
-/* Queue size of listen(2) */
-#define LTTNG_SESSIOND_COMM_MAX_LISTEN 64
-
-/* Maximum number of FDs that can be sent over a Unix socket */
-#define LTTCOMM_MAX_SEND_FDS 4
-
-/*
- * Get the error code index from 0 since LTTCOMM_OK start at 1000
- */
-#define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_CONSUMERD_COMMAND_SOCK_READY)
-
-enum lttcomm_sessiond_command {
- /* Tracer command */
- LTTNG_ADD_CONTEXT = 0,
- /* LTTNG_CALIBRATE used to be here */
- LTTNG_DISABLE_CHANNEL = 2,
- LTTNG_DISABLE_EVENT = 3,
- LTTNG_LIST_SYSCALLS = 4,
- LTTNG_ENABLE_CHANNEL = 5,
- LTTNG_ENABLE_EVENT = 6,
- /* 7 */
- /* Session daemon command */
- LTTNG_CREATE_SESSION = 8,
- LTTNG_DESTROY_SESSION = 9,
- LTTNG_LIST_CHANNELS = 10,
- LTTNG_LIST_DOMAINS = 11,
- LTTNG_LIST_EVENTS = 12,
- LTTNG_LIST_SESSIONS = 13,
- LTTNG_LIST_TRACEPOINTS = 14,
- LTTNG_REGISTER_CONSUMER = 15,
- LTTNG_START_TRACE = 16,
- LTTNG_STOP_TRACE = 17,
- LTTNG_LIST_TRACEPOINT_FIELDS = 18,
-
- /* Consumer */
- LTTNG_DISABLE_CONSUMER = 19,
- LTTNG_ENABLE_CONSUMER = 20,
- LTTNG_SET_CONSUMER_URI = 21,
- /* 22 */
- /* 23 */
- LTTNG_DATA_PENDING = 24,
- LTTNG_SNAPSHOT_ADD_OUTPUT = 25,
- LTTNG_SNAPSHOT_DEL_OUTPUT = 26,
- LTTNG_SNAPSHOT_LIST_OUTPUT = 27,
- LTTNG_SNAPSHOT_RECORD = 28,
- LTTNG_CREATE_SESSION_SNAPSHOT = 29,
- LTTNG_CREATE_SESSION_LIVE = 30,
- LTTNG_SAVE_SESSION = 31,
- LTTNG_TRACK_PID = 32,
- LTTNG_UNTRACK_PID = 33,
- LTTNG_LIST_TRACKER_PIDS = 34,
- LTTNG_SET_SESSION_SHM_PATH = 40,
- LTTNG_REGENERATE_METADATA = 41,
- LTTNG_REGENERATE_STATEDUMP = 42,
- LTTNG_REGISTER_TRIGGER = 43,
- LTTNG_UNREGISTER_TRIGGER = 44,
-};
-
-enum lttcomm_relayd_command {
- RELAYD_ADD_STREAM = 1,
- RELAYD_CREATE_SESSION = 2,
- RELAYD_START_DATA = 3,
- RELAYD_UPDATE_SYNC_INFO = 4,
- RELAYD_VERSION = 5,
- RELAYD_SEND_METADATA = 6,
- RELAYD_CLOSE_STREAM = 7,
- RELAYD_DATA_PENDING = 8,
- RELAYD_QUIESCENT_CONTROL = 9,
- RELAYD_BEGIN_DATA_PENDING = 10,
- RELAYD_END_DATA_PENDING = 11,
- RELAYD_ADD_INDEX = 12,
- RELAYD_SEND_INDEX = 13,
- RELAYD_CLOSE_INDEX = 14,
- /* Live-reading commands (2.4+). */
- RELAYD_LIST_SESSIONS = 15,
- /* All streams of the channel have been sent to the relayd (2.4+). */
- RELAYD_STREAMS_SENT = 16,
- /* Ask the relay to reset the metadata trace file (2.8+) */
- RELAYD_RESET_METADATA = 17,
-};
-
-/*
- * lttcomm error code.
- */
-enum lttcomm_return_code {
- LTTCOMM_CONSUMERD_SUCCESS = 0, /* Everything went fine. */
- LTTCOMM_CONSUMERD_COMMAND_SOCK_READY = 1, /* Command socket ready */
- LTTCOMM_CONSUMERD_SUCCESS_RECV_FD, /* Success on receiving fds */
- LTTCOMM_CONSUMERD_ERROR_RECV_FD, /* Error on receiving fds */
- LTTCOMM_CONSUMERD_ERROR_RECV_CMD, /* Error on receiving command */
- LTTCOMM_CONSUMERD_POLL_ERROR, /* Error in polling thread */
- LTTCOMM_CONSUMERD_POLL_NVAL, /* Poll on closed fd */
- LTTCOMM_CONSUMERD_POLL_HUP, /* All fds have hungup */
- LTTCOMM_CONSUMERD_EXIT_SUCCESS, /* Consumerd exiting normally */
- LTTCOMM_CONSUMERD_EXIT_FAILURE, /* Consumerd exiting on error */
- LTTCOMM_CONSUMERD_OUTFD_ERROR, /* Error opening the tracefile */
- LTTCOMM_CONSUMERD_SPLICE_EBADF, /* EBADF from splice(2) */
- LTTCOMM_CONSUMERD_SPLICE_EINVAL, /* EINVAL from splice(2) */
- LTTCOMM_CONSUMERD_SPLICE_ENOMEM, /* ENOMEM from splice(2) */
- LTTCOMM_CONSUMERD_SPLICE_ESPIPE, /* ESPIPE from splice(2) */
- LTTCOMM_CONSUMERD_ENOMEM, /* Consumer is out of memory */
- LTTCOMM_CONSUMERD_ERROR_METADATA, /* Error with metadata. */
- LTTCOMM_CONSUMERD_FATAL, /* Fatal error. */
- LTTCOMM_CONSUMERD_RELAYD_FAIL, /* Error on remote relayd */
- LTTCOMM_CONSUMERD_CHANNEL_FAIL, /* Channel creation failed. */
- LTTCOMM_CONSUMERD_CHAN_NOT_FOUND, /* Channel not found. */
- LTTCOMM_CONSUMERD_ALREADY_SET, /* Resource already set. */
-
- /* MUST be last element */
- LTTCOMM_NR, /* Last element */
-};
-
-/* lttng socket protocol. */
-enum lttcomm_sock_proto {
- LTTCOMM_SOCK_UDP,
- LTTCOMM_SOCK_TCP,
-};
-
-/*
- * Index in the net_families array below. Please keep in sync!
- */
-enum lttcomm_sock_domain {
- LTTCOMM_INET = 0,
- LTTCOMM_INET6 = 1,
-};
-
-enum lttcomm_metadata_command {
- LTTCOMM_METADATA_REQUEST = 1,
-};
-
-/*
- * Commands sent from the consumerd to the sessiond to request if new metadata
- * is available. This message is used to find the per UID _or_ per PID registry
- * for the channel key. For per UID lookup, the triplet
- * bits_per_long/uid/session_id is used. On lookup failure, we search for the
- * per PID registry indexed by session id ignoring the other values.
- */
-struct lttcomm_metadata_request_msg {
- uint64_t session_id; /* Tracing session id */
- uint64_t session_id_per_pid; /* Tracing session id for per-pid */
- uint32_t bits_per_long; /* Consumer ABI */
- uint32_t uid;
- uint64_t key; /* Metadata channel key. */
-} LTTNG_PACKED;
-
-struct lttcomm_sockaddr {
- enum lttcomm_sock_domain type;
- union {
- struct sockaddr_in sin;
- struct sockaddr_in6 sin6;
- } addr;
-} LTTNG_PACKED;
-
-struct lttcomm_sock {
- int32_t fd;
- enum lttcomm_sock_proto proto;
- struct lttcomm_sockaddr sockaddr;
- const struct lttcomm_proto_ops *ops;
-} LTTNG_PACKED;
-
-/*
- * Relayd sock. Adds the protocol version to use for the communications with
- * the relayd.
- */
-struct lttcomm_relayd_sock {
- struct lttcomm_sock sock;
- uint32_t major;
- uint32_t minor;
-} LTTNG_PACKED;
-
-struct lttcomm_net_family {
- int family;
- int (*create) (struct lttcomm_sock *sock, int type, int proto);
-};
-
-struct lttcomm_proto_ops {
- int (*bind) (struct lttcomm_sock *sock);
- int (*close) (struct lttcomm_sock *sock);
- int (*connect) (struct lttcomm_sock *sock);
- struct lttcomm_sock *(*accept) (struct lttcomm_sock *sock);
- int (*listen) (struct lttcomm_sock *sock, int backlog);
- ssize_t (*recvmsg) (struct lttcomm_sock *sock, void *buf, size_t len,
- int flags);
- ssize_t (*sendmsg) (struct lttcomm_sock *sock, const void *buf,
- size_t len, int flags);
-};
-
-/*
- * Data structure received from lttng client to session daemon.
- */
-struct lttcomm_session_msg {
- uint32_t cmd_type; /* enum lttcomm_sessiond_command */
- struct lttng_session session;
- struct lttng_domain domain;
- union {
- /* Event data */
- struct {
- char channel_name[LTTNG_SYMBOL_NAME_LEN];
- struct lttng_event event LTTNG_PACKED;
- /* Length of following filter expression. */
- uint32_t expression_len;
- /* Length of following bytecode for filter. */
- uint32_t bytecode_len;
- /* exclusion data */
- uint32_t exclusion_count;
- /*
- * After this structure, the following variable-length
- * items are transmitted:
- * - char exclusion_names[LTTNG_SYMBOL_NAME_LEN][exclusion_count]
- * - unsigned char filter_expression[expression_len]
- * - unsigned char filter_bytecode[bytecode_len]
- */
- } LTTNG_PACKED enable;
- struct {
- char channel_name[LTTNG_SYMBOL_NAME_LEN];
- struct lttng_event event LTTNG_PACKED;
- /* Length of following filter expression. */
- uint32_t expression_len;
- /* Length of following bytecode for filter. */
- uint32_t bytecode_len;
- /*
- * After this structure, the following variable-length
- * items are transmitted:
- * - unsigned char filter_expression[expression_len]
- * - unsigned char filter_bytecode[bytecode_len]
- */
- } LTTNG_PACKED disable;
- /* Create channel */
- struct {
- struct lttng_channel chan LTTNG_PACKED;
- /* struct lttng_channel_extended is already packed. */
- struct lttng_channel_extended extended;
- } LTTNG_PACKED channel;
- /* Context */
- struct {
- char channel_name[LTTNG_SYMBOL_NAME_LEN];
- struct lttng_event_context ctx LTTNG_PACKED;
- uint32_t provider_name_len;
- uint32_t context_name_len;
- } LTTNG_PACKED context;
- /* Use by register_consumer */
- struct {
- char path[PATH_MAX];
- } LTTNG_PACKED reg;
- /* List */
- struct {
- char channel_name[LTTNG_SYMBOL_NAME_LEN];
- } LTTNG_PACKED list;
- struct lttng_calibrate calibrate;
- /* Used by the set_consumer_url and used by create_session also call */
- struct {
- /* Number of lttng_uri following */
- uint32_t size;
- } LTTNG_PACKED uri;
- struct {
- struct lttng_snapshot_output output LTTNG_PACKED;
- } LTTNG_PACKED snapshot_output;
- struct {
- uint32_t wait;
- struct lttng_snapshot_output output LTTNG_PACKED;
- } LTTNG_PACKED snapshot_record;
- struct {
- uint32_t nb_uri;
- unsigned int timer_interval; /* usec */
- } LTTNG_PACKED session_live;
- struct {
- struct lttng_save_session_attr attr; /* struct already packed */
- } LTTNG_PACKED save_session;
- struct {
- char shm_path[PATH_MAX];
- } LTTNG_PACKED set_shm_path;
- struct {
- uint32_t pid;
- } LTTNG_PACKED pid_tracker;
- struct {
- uint32_t length;
- } LTTNG_PACKED trigger;
- } u;
-} LTTNG_PACKED;
-
-#define LTTNG_FILTER_MAX_LEN 65536
-
-/*
- * Filter bytecode data. The reloc table is located at the end of the
- * bytecode. It is made of tuples: (uint16_t, var. len. string). It
- * starts at reloc_table_offset.
- */
-#define LTTNG_FILTER_PADDING 32
-struct lttng_filter_bytecode {
- uint32_t len; /* len of data */
- uint32_t reloc_table_offset;
- uint64_t seqnum;
- char padding[LTTNG_FILTER_PADDING];
- char data[0];
-} LTTNG_PACKED;
-
-/*
- * Event exclusion data. At the end of the structure, there will actually
- * by zero or more names, where the actual number of names is given by
- * the 'count' item of the structure.
- */
-#define LTTNG_EVENT_EXCLUSION_PADDING 32
-struct lttng_event_exclusion {
- uint32_t count;
- char padding[LTTNG_EVENT_EXCLUSION_PADDING];
- char names[0][LTTNG_SYMBOL_NAME_LEN];
-} LTTNG_PACKED;
-
-#define LTTNG_EVENT_EXCLUSION_NAME_AT(_exclusion, _i) \
- (&(_exclusion)->names[_i][0])
-
-/*
- * Event command header.
- */
-struct lttcomm_event_command_header {
- /* Number of events */
- uint32_t nb_events;
-} LTTNG_PACKED;
-
-/*
- * Event extended info header. This is the structure preceding each
- * extended info data.
- */
-struct lttcomm_event_extended_header {
- /*
- * Size of filter string immediately following this header.
- * This size includes the terminal null character.
- */
- uint32_t filter_len;
-
- /*
- * Number of exclusion names, immediately following the filter
- * string. Each exclusion name has a fixed length of
- * LTTNG_SYMBOL_NAME_LEN bytes, including the terminal null
- * character.
- */
- uint32_t nb_exclusions;
-} LTTNG_PACKED;
-
-/*
- * Data structure for the response from sessiond to the lttng client.
- */
-struct lttcomm_lttng_msg {
- uint32_t cmd_type; /* enum lttcomm_sessiond_command */
- uint32_t ret_code; /* enum lttcomm_return_code */
- uint32_t pid; /* pid_t */
- uint32_t cmd_header_size;
- uint32_t data_size;
-} LTTNG_PACKED;
-
-struct lttcomm_lttng_output_id {
- uint32_t id;
-} LTTNG_PACKED;
-
-/*
- * lttcomm_consumer_msg is the message sent from sessiond to consumerd
- * to either add a channel, add a stream, update a stream, or stop
- * operation.
- */
-struct lttcomm_consumer_msg {
- uint32_t cmd_type; /* enum consumerd_command */
- union {
- struct {
- uint64_t channel_key;
- uint64_t session_id;
- char pathname[PATH_MAX];
- uint32_t uid;
- uint32_t gid;
- uint64_t relayd_id;
- /* nb_init_streams is the number of streams open initially. */
- uint32_t nb_init_streams;
- char name[LTTNG_SYMBOL_NAME_LEN];
- /* Use splice or mmap to consume this fd */
- enum lttng_event_output output;
- int type; /* Per cpu or metadata. */
- uint64_t tracefile_size; /* bytes */
- uint32_t tracefile_count; /* number of tracefiles */
- /* If the channel's streams have to be monitored or not. */
- uint32_t monitor;
- /* timer to check the streams usage in live mode (usec). */
- unsigned int live_timer_interval;
- /* timer to sample a channel's positions (usec). */
- unsigned int monitor_timer_interval;
- } LTTNG_PACKED channel; /* Only used by Kernel. */
- struct {
- uint64_t stream_key;
- uint64_t channel_key;
- int32_t cpu; /* On which CPU this stream is assigned. */
- /* Tells the consumer if the stream should be or not monitored. */
- uint32_t no_monitor;
- } LTTNG_PACKED stream; /* Only used by Kernel. */
- struct {
- uint64_t net_index;
- enum lttng_stream_type type;
- /* Open socket to the relayd */
- struct lttcomm_relayd_sock sock;
- /* Tracing session id associated to the relayd. */
- uint64_t session_id;
- /* Relayd session id, only used with control socket. */
- uint64_t relayd_session_id;
- } LTTNG_PACKED relayd_sock;
- struct {
- uint64_t net_seq_idx;
- } LTTNG_PACKED destroy_relayd;
- struct {
- uint64_t session_id;
- } LTTNG_PACKED data_pending;
- struct {
- uint64_t subbuf_size; /* bytes */
- uint64_t num_subbuf; /* power of 2 */
- int32_t overwrite; /* 1: overwrite, 0: discard */
- uint32_t switch_timer_interval; /* usec */
- uint32_t read_timer_interval; /* usec */
- unsigned int live_timer_interval; /* usec */
- uint32_t monitor_timer_interval; /* usec */
- int32_t output; /* splice, mmap */
- int32_t type; /* metadata or per_cpu */
- uint64_t session_id; /* Tracing session id */
- char pathname[PATH_MAX]; /* Channel file path. */
- char name[LTTNG_SYMBOL_NAME_LEN]; /* Channel name. */
- uint32_t uid; /* User ID of the session */
- uint32_t gid; /* Group ID ot the session */
- uint64_t relayd_id; /* Relayd id if apply. */
- uint64_t key; /* Unique channel key. */
- unsigned char uuid[UUID_LEN]; /* uuid for ust tracer. */
- uint32_t chan_id; /* Channel ID on the tracer side. */
- uint64_t tracefile_size; /* bytes */
- uint32_t tracefile_count; /* number of tracefiles */
- uint64_t session_id_per_pid; /* Per-pid session ID. */
- /* Tells the consumer if the stream should be or not monitored. */
- uint32_t monitor;
- /*
- * For UST per UID buffers, this is the application UID of the
- * channel. This can be different from the user UID requesting the
- * channel creation and used for the rights on the stream file
- * because the application can be in the tracing for instance.
- */
- uint32_t ust_app_uid;
- int64_t blocking_timeout;
- char root_shm_path[PATH_MAX];
- char shm_path[PATH_MAX];
- } LTTNG_PACKED ask_channel;
- struct {
- uint64_t key;
- } LTTNG_PACKED get_channel;
- struct {
- uint64_t key;
- } LTTNG_PACKED destroy_channel;
- struct {
- uint64_t key; /* Metadata channel key. */
- uint64_t target_offset; /* Offset in the consumer */
- uint64_t len; /* Length of metadata to be received. */
- uint64_t version; /* Version of the metadata. */
- } LTTNG_PACKED push_metadata;
- struct {
- uint64_t key; /* Metadata channel key. */
- } LTTNG_PACKED close_metadata;
- struct {
- uint64_t key; /* Metadata channel key. */
- } LTTNG_PACKED setup_metadata;
- struct {
- uint64_t key; /* Channel key. */
- } LTTNG_PACKED flush_channel;
- struct {
- uint64_t key; /* Channel key. */
- } LTTNG_PACKED clear_quiescent_channel;
- struct {
- char pathname[PATH_MAX];
- /* Indicate if the snapshot goes on the relayd or locally. */
- uint32_t use_relayd;
- uint32_t metadata; /* This a metadata snapshot. */
- uint64_t relayd_id; /* Relayd id if apply. */
- uint64_t key;
- uint64_t nb_packets_per_stream;
- } LTTNG_PACKED snapshot_channel;
- struct {
- uint64_t channel_key;
- uint64_t net_seq_idx;
- } LTTNG_PACKED sent_streams;
- struct {
- uint64_t session_id;
- uint64_t channel_key;
- } LTTNG_PACKED discarded_events;
- struct {
- uint64_t session_id;
- uint64_t channel_key;
- } LTTNG_PACKED lost_packets;
- struct {
- uint64_t session_id;
- } LTTNG_PACKED regenerate_metadata;
- } u;
-} LTTNG_PACKED;
-
-/*
- * Channel monitoring message returned to the session daemon on every
- * monitor timer expiration.
- */
-struct lttcomm_consumer_channel_monitor_msg {
- /* Key of the sampled channel. */
- uint64_t key;
- /*
- * Lowest and highest usage (bytes) at the moment the sample was taken.
- */
- uint64_t lowest, highest;
-} LTTNG_PACKED;
-
-/*
- * Status message returned to the sessiond after a received command.
- */
-struct lttcomm_consumer_status_msg {
- enum lttcomm_return_code ret_code;
-} LTTNG_PACKED;
-
-struct lttcomm_consumer_status_channel {
- enum lttcomm_return_code ret_code;
- uint64_t key;
- unsigned int stream_count;
-} LTTNG_PACKED;
-
-#ifdef HAVE_LIBLTTNG_UST_CTL
-
-#include <lttng/ust-abi.h>
-
-/*
- * Data structure for the commands sent from sessiond to UST.
- */
-struct lttcomm_ust_msg {
- uint32_t handle;
- uint32_t cmd;
- union {
- struct lttng_ust_channel channel;
- struct lttng_ust_stream stream;
- struct lttng_ust_event event;
- struct lttng_ust_context context;
- struct lttng_ust_tracer_version version;
- } u;
-} LTTNG_PACKED;
-
-/*
- * Data structure for the response from UST to the session daemon.
- * cmd_type is sent back in the reply for validation.
- */
-struct lttcomm_ust_reply {
- uint32_t handle;
- uint32_t cmd;
- uint32_t ret_code; /* enum lttcomm_return_code */
- uint32_t ret_val; /* return value */
- union {
- struct {
- uint64_t memory_map_size;
- } LTTNG_PACKED channel;
- struct {
- uint64_t memory_map_size;
- } LTTNG_PACKED stream;
- struct lttng_ust_tracer_version version;
- } u;
-} LTTNG_PACKED;
-
-#endif /* HAVE_LIBLTTNG_UST_CTL */
-
-extern const char *lttcomm_get_readable_code(enum lttcomm_return_code code);
-
-extern int lttcomm_init_inet_sockaddr(struct lttcomm_sockaddr *sockaddr,
- const char *ip, unsigned int port);
-extern int lttcomm_init_inet6_sockaddr(struct lttcomm_sockaddr *sockaddr,
- const char *ip, unsigned int port);
-
-extern struct lttcomm_sock *lttcomm_alloc_sock(enum lttcomm_sock_proto proto);
-extern int lttcomm_create_sock(struct lttcomm_sock *sock);
-extern struct lttcomm_sock *lttcomm_alloc_sock_from_uri(struct lttng_uri *uri);
-extern void lttcomm_destroy_sock(struct lttcomm_sock *sock);
-extern struct lttcomm_sock *lttcomm_alloc_copy_sock(struct lttcomm_sock *src);
-extern void lttcomm_copy_sock(struct lttcomm_sock *dst,
- struct lttcomm_sock *src);
-
-/* Relayd socket object. */
-extern struct lttcomm_relayd_sock *lttcomm_alloc_relayd_sock(
- struct lttng_uri *uri, uint32_t major, uint32_t minor);
-
-extern int lttcomm_setsockopt_rcv_timeout(int sock, unsigned int msec);
-extern int lttcomm_setsockopt_snd_timeout(int sock, unsigned int msec);
-
-extern void lttcomm_init(void);
-/* Get network timeout, in milliseconds */
-extern unsigned long lttcomm_get_network_timeout(void);
-
-#endif /* _LTTNG_SESSIOND_COMM_H */
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