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mtr 0.94

    1: /*
    2:     mtr  --  a network diagnostic tool
    3:     Copyright (C) 2016  Matt Kimball
    4: 
    5:     This program is free software; you can redistribute it and/or modify
    6:     it under the terms of the GNU General Public License version 2 as
    7:     published by the Free Software Foundation.
    8: 
    9:     This program is distributed in the hope that it will be useful,
   10:     but WITHOUT ANY WARRANTY; without even the implied warranty of
   11:     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   12:     GNU General Public License for more details.
   13: 
   14:     You should have received a copy of the GNU General Public License along
   15:     with this program; if not, write to the Free Software Foundation, Inc.,
   16:     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
   17: */
   18: 
   19: #ifndef CMDPIPE_H
   20: #define CMDPIPE_H
   21: 
   22: #include "mtr.h"
   23: 
   24: #define COMMAND_BUFFER_SIZE 4096
   25: #define PACKET_REPLY_BUFFER_SIZE 4096
   26: 
   27: /*  We use a pipe to the mtr-packet subprocess to generate probes  */
   28: struct packet_command_pipe_t {
   29:     /*  the process id of mtr-packet  */
   30:     pid_t pid;
   31: 
   32:     /*  the end of the pipe we read for replies  */
   33:     int read_fd;
   34: 
   35:     /*  the end of the pipe we write for commands  */
   36:     int write_fd;
   37: 
   38:     /* storage for incoming replies */
   39:     char reply_buffer[PACKET_REPLY_BUFFER_SIZE];
   40: 
   41:     /*  the number of bytes currently used in reply_buffer  */
   42:     size_t reply_buffer_used;
   43: };
   44: 
   45: typedef
   46: void (
   47:     *probe_reply_func_t) (
   48:     struct mtr_ctl * ctl,
   49:     int sequence,
   50:     int err,
   51:     struct mplslen * mpls,
   52:     ip_t * addr,
   53:     int round_trip_time);
   54: 
   55: int open_command_pipe(
   56:     struct mtr_ctl *ctl,
   57:     struct packet_command_pipe_t *cmdpipe);
   58: 
   59: void close_command_pipe(
   60:     struct packet_command_pipe_t *cmdpipe);
   61: 
   62: void send_probe_command(
   63:     struct mtr_ctl *ctl,
   64:     struct packet_command_pipe_t *cmdpipe,
   65:     ip_t * address,
   66:     ip_t * localaddress,
   67:     int packet_size,
   68:     int sequence,
   69:     int time_to_live);
   70: 
   71: void handle_command_replies(
   72:     struct mtr_ctl *ctl,
   73:     struct packet_command_pipe_t *cmdpipe,
   74:     probe_reply_func_t reply_func);
   75: 
   76: #endif