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/*
mtr -- a network diagnostic tool
Copyright (C) 2016 Matt Kimball
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2 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.
*/
#ifndef CMDPIPE_H
#define CMDPIPE_H
#include "mtr.h"
#define COMMAND_BUFFER_SIZE 4096
#define PACKET_REPLY_BUFFER_SIZE 4096
/* We use a pipe to the mtr-packet subprocess to generate probes */
struct packet_command_pipe_t {
/* the process id of mtr-packet */
pid_t pid;
/* the end of the pipe we read for replies */
int read_fd;
/* the end of the pipe we write for commands */
int write_fd;
/* storage for incoming replies */
char reply_buffer[PACKET_REPLY_BUFFER_SIZE];
/* the number of bytes currently used in reply_buffer */
size_t reply_buffer_used;
};
typedef
void (
*probe_reply_func_t) (
struct mtr_ctl * ctl,
int sequence,
int err,
struct mplslen * mpls,
ip_t * addr,
int round_trip_time);
int open_command_pipe(
struct mtr_ctl *ctl,
struct packet_command_pipe_t *cmdpipe);
void close_command_pipe(
struct packet_command_pipe_t *cmdpipe);
void send_probe_command(
struct mtr_ctl *ctl,
struct packet_command_pipe_t *cmdpipe,
ip_t * address,
ip_t * localaddress,
int packet_size,
int sequence,
int time_to_live);
void handle_command_replies(
struct mtr_ctl *ctl,
struct packet_command_pipe_t *cmdpipe,
probe_reply_func_t reply_func);
#endif
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