/* $Id$ */

/*
 *   Copyright (c) 2001-2010 Aaron Turner <aturner at synfin dot net>
 *   Copyright (c) 2013-2026 Fred Klassen <tcpreplay at appneta dot com> - AppNeta
 *
 *   The Tcpreplay Suite of tools is free software: you can redistribute it 
 *   and/or modify it under the terms of the GNU General Public License as 
 *   published by the Free Software Foundation, either version 3 of the 
 *   License, or with the authors permission any later version.
 *
 *   The Tcpreplay Suite 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 the Tcpreplay Suite.  If not, see <http://www.gnu.org/licenses/>.
 */

autogen definitions options;


copyright = {
    date        = "2000-2026";
    owner       = "Aaron Turner and Fred Klassen";
    eaddr       = "tcpreplay-users@lists.sourceforge.net"; 
    type        = gpl;
    author      = <<- EOText
Copyright 2013-2026 Fred Klassen - AppNeta

Copyright 2000-2012 Aaron Turner

For support please use the tcpreplay-users@lists.sourceforge.net mailing list.

The latest version of this software is always available from:
http://tcpreplay.appneta.com/
EOText;
};

package         = "tcpreplay";
#ifdef TCPREPLAY_EDIT_MAN
prog-name       = "tcpreplay-edit";
#else 
prog-name       = "tcpreplay";
#endif
prog-title      = "Replay network traffic stored in pcap files";
long-opts;
gnu-usage;
help-value      = "H";
save-opts-value = "";
load-opts-value = "";
argument = "<pcap_file(s)> | <pcap_dir(s)>";


config-header   = "config.h";

include         = "#include \"defines.h\"\n"
                "#include \"tcpreplay.h\"\n"
                "#include \"tcpreplay_api.h\"\n"
                "#include \"common.h\"\n"
                "#include \"config.h\"\n"
                "#include <stdlib.h>\n"
                "#include <sys/types.h>\n"
                "#include <unistd.h>\n"
                "extern tcpreplay_t *ctx;";

homerc          = "$$/";

#ifdef TCPREPLAY_EDIT
#include tcpedit/tcpedit_opts.def
#endif

explain = <<- EOExplain
tcpreplay is a tool for replaying network traffic from files saved with
tcpdump or other tools which write pcap(3) files.
EOExplain;

detail = <<- EODetail
The basic operation of tcpreplay is to resend  all  packets  from  the
input file(s) at the speed at which they were recorded, or a specified 
data rate, up to as fast as the hardware is capable.

Optionally, the traffic can be split between two interfaces, written to
files, filtered and edited in various ways, providing the means to test
firewalls, NIDS and other network devices.

For more details, please see the Tcpreplay Manual at:
http://tcpreplay.appneta.com
EODetail;

man-doc = <<- EOMan
.SH "SIGNALS"
tcpreplay understands the following signals:
@enumerate
@item @var{SIGUSR1}
Suspend tcpreplay
@item @var{SIGCONT}
Restart tcpreplay
@end enumerate

.SH "SEE ALSO"
tcpdump(1), tcpbridge(1), tcprewrite(1), tcpprep(1), tcpcapinfo(1)

.SH "BUGS"
tcpreplay can only send packets as fast as your computer's interface,
processor, disk and system bus will allow.

Packet timing at high speeds is a black art and very OS/CPU dependent.  

Replaying captured traffic may simulate odd or broken conditions on your
network and cause all sorts of problems.

In most cases, you can not replay traffic back to/at a server.

Some operating systems by default do not allow for forging source MAC
addresses.  Please consult your operating system's documentation and the
tcpreplay FAQ if you experience this issue.
EOMan;


flag = {
    ifdef       = DEBUG;
    name        = dbug;
    value       = d;
    arg-type    = number;
    max         = 1;
    immediate;
    arg-range   = "0->5";
    arg-default = 0;
    descrip     = "Enable debugging output";
    doc         = <<- EOText
If configured with --enable-debug, then you can specify a verbosity 
level for debugging output.  Higher numbers increase verbosity.
EOText;
};

flag = {
    name        = quiet;
    value       = q;
    descrip     = "Quiet mode";
    doc	        = "Print nothing except the statistics at the end of the run";
};

flag = {
    name        = timer;
    value       = T;
    arg-default = "gtod";
    max	        = 1;
    arg-type    = string;
    descrip     = "Select packet timing mode: select, ioport, gtod, nano";
    doc	        = <<- EOText
Allows you to select the packet timing method to use:
@enumerate
@item nano
- Use nanosleep() API
@item select
- Use select() API
@item ioport
- Write to the i386 IO Port 0x80
@item gtod [default]
- Use a gettimeofday() loop
@end enumerate

EOText;
};

flag = {
    name        = maxsleep;
    arg-type    = number;
    arg-default = 0;
    descrip     = "Sleep for no more then X milliseconds between packets";
    doc         = <<- EOText
Set a limit for the maximum number of milliseconds that tcpreplay will sleep
between packets.  Effectively prevents long delays between packets without
effecting the majority of packets.  Default is disabled.
EOText;
};

/* Verbose decoding via tcpdump */
flag = {
    ifdef       = ENABLE_VERBOSE;
    name        = verbose;
    value       = v;
    max         = 1;
    immediate;
    descrip     = "Print decoded packets via tcpdump to STDOUT";
    settable;
    doc         = "";
};

flag = {
    ifdef       = ENABLE_VERBOSE;
    name        = decode;
    flags-must  = verbose;
    value       = A;
    arg-type    = string;
    max         = 1;
    descrip     = "Arguments passed to tcpdump decoder";
    doc         = <<- EOText
When enabling verbose mode (@var{-v}) you may also specify one or more
additional  arguments to pass to @code{tcpdump} to modify the way packets
are decoded.  By default, -n and -l are used.   Be  sure  to
quote the arguments like: -A "-axxx" so that they are not interpreted
by tcpreplay.   Please see the tcpdump(1) man page for a complete list of 
options.
EOText;
};

flag = {
    name        = preload_pcap;
    value       = K;
    descrip     = "Preloads packets into RAM before sending";
    doc         = <<- EOText
This option loads the specified pcap(s) into RAM before starting to send in order
to improve replay performance while introducing a startup performance hit.
Preloading can be used with or without @var{--loop}. This option also suppresses
flow statistics collection for every iteration, which can significantly reduce
memory usage. Flow statistics are predicted based on options supplied and
statistics collected from the first loop iteration.
EOText;
};

/*
 * Output modifiers: -c
 */

flag = {
    name        = cachefile;
    value       = c;
    arg-type    = string;
    flags-cant  = dualfile;
    flags-must  = intf2;
    max         = 1;
    descrip     = "Split traffic via a tcpprep cache file";
    doc         = <<- EOText
If you have a pcap file you would like to use to send bi-directional
traffic through a device (firewall, router, IDS, etc) then using tcpprep
you can create a cachefile which tcpreplay will use to split the traffic
across two network interfaces.
EOText;
};

flag = {
    name        = dualfile;
    value       = 2;
    max         = 1;
    flags-cant  = cachefile;
    flags-must  = intf2;
    descrip     = "Replay two files at a time from a network tap";
    doc         = <<- EOText
If you captured network traffic using a network tap, then you can end up with
two pcap files- one for each direction.  This option will replay these two
files at the same time, one on each interface and inter-mix them using the 
timestamps in each.
EOText;
};

/*
 * Outputs: -i, -I
 */

flag = {
    name        = intf1;
    value       = i;
    arg-type    = string;
    max         = 1;
    equivalence = intf1;
    must-set;
    descrip     = "Client to server/RX/primary traffic output interface";
    doc         = <<- EOText
Required network interface used to send either all traffic or traffic which is 
marked as 'primary' via tcpprep.  Primary traffic is usually client-to-server 
or inbound (RX) on khial virtual interfaces.
EOText;
};

flag = {
    name        = intf2;
    value       = I;
    arg-type    = string;
    max         = 1;
    descrip     = "Server to client/TX/secondary traffic output interface";
    doc         = <<- EOText
Optional network interface used to send traffic which is marked as 'secondary' 
via tcpprep.  Secondary traffic is usually server-to-client or outbound 
(TX) on khial virtual interfaces.  Generally, it only makes sense to use this
option with --cachefile.
EOText;
};

flag = {
    name        = write;
    value       = w;
    arg-type    = string;
    max         = 1;
    equivalence = intf1;
    flags-cant  = intf2;
    descrip     = "Pcap file to receive traffic outputs";
    doc         = <<- EOText
Optional pcap file name used to receive traffic.
EOText;
};

flag = {
    name        = include;
    arg-type    = string;
    max         = 1;
    descrip     = "Send only selected packet numbers";
    flags-cant  = exclude;
    flag-code   = <<- EOInclude

    char *include;
    include = safe_strdup(OPT_ARG(INCLUDE));

    ctx->options->is_exclude = false;
    if (!parse_list(&ctx->options->list, include))
        errx(-1, "Unable to parse include/exclude rule: %s", OPT_ARG(INCLUDE));

    free(include);

EOInclude;
    doc         = <<- EOText
Override default of processing all packets stored in the capture file and only
send packets that are part of a supplied list of packet numbers.

@example
-x P:1-5,9,15,72-
@end example
would skip packets 1 through 5, the 9th and 15th packet, and packets 72 until the
end of the file
EOText;
};

flag = {
    name        = exclude;
    arg-type    = string;
    max         = 1;
    descrip     = "Send all but selected packet numbers";
    flags-cant  = include;
    flag-code   = <<- EOExclude

    char *exclude;
    exclude = safe_strdup(OPT_ARG(EXCLUDE));

    ctx->options->is_exclude = true;
    if (!parse_list(&ctx->options->list, exclude))
        errx(-1, "Unable to parse include/exclude rule: %s", OPT_ARG(EXCLUDE));

    free(exclude);

EOExclude;
    doc         = <<- EOText
Override default of processing all packets stored in the capture file and only
send packets that are NOT part of a supplied list of packet numbers.

@example
-x P:1-5,9,15,72-
@end example
would skip packets 1 through 5, the 9th and 15th packet, and packets 72 until the
end of the file
EOText;
};


flag = {
    ifdef       = ENABLE_PCAP_FINDALLDEVS;
    name        = listnics;
    descrip     = "List available network interfaces and exit";
    immediate;
    doc         = "";
    flag-code   = <<- EOFlag

    interface_list_t *tmp, *list = get_interface_list();
    list_interfaces(list);
    while (list != NULL) {
        tmp = list->next;
        safe_free(list);
        list = tmp;
    }
    exit(0);

EOFlag;
};

/*
 * Limits and loops: -l
 */

flag = {
    name        = loop;
    value       = l;
    arg-type    = number;
    arg-range   = "0->";
    max         = 1;
    descrip     = "Loop through the capture file X times";
    arg-default = 1;
    doc         = "";
};

flag = {
    name        = loopdelay-ms;
    flags-cant  = loopdelay-ns;
    flags-must  = loop;
    arg-type    = number;
    arg-range   = "0->";
    descrip     = "Delay between loops in milliseconds";
    arg-default = 0;
    doc         = "";
};

flag = {
    name        = loopdelay-ns;
    flags-cant  = loopdelay-ms;
    flags-must  = loop;
    arg-type    = number;
    arg-range   = "0->";
    descrip     = "Delay between loops in nanoseconds";
    arg-default = 0;
    doc         = <<- EOText
By default, tcpreplay will use loop delay with microsecond accuracy (loopdelay-ms).
In order to use loop delay with nanosecond accuracy you need to use nano packet timing mode.
EOText;
};

flag = {
    name        = pktlen;
    max         = 1;
    descrip     = "Override the snaplen and use the actual packet len";
    doc         = <<- EOText
By default, tcpreplay will send packets based on the size of the "snaplen"
stored in the pcap file which is usually the correct thing to do.  However,
occasionally, tools will store more bytes then told to.  By specifying this
option, tcpreplay will ignore the snaplen field and instead try to send
packets based on the original packet length.  Bad things may happen if
you specify this option.
EOText;
};

flag = {
    name        = limit;
    value       = L;
    arg-type    = number;
    max         = 1;
    arg-default = -1;
    arg-range   = "1->";
    descrip     = "Limit the number of packets to send";
    doc         = <<- EOText
By default, tcpreplay will send all the packets.  Alternatively, you can 
specify a maximum number of packets to send.  
EOText;
};

flag = {
    name        = duration;
    arg-type    = number;
    max         = 1;
    arg-default = -1;
    arg-range   = "1->";
    descrip     = "Limit the number of seconds to send";
    doc         = <<- EOText
By default, tcpreplay will send all the packets.  Alternatively, you can
specify a maximum number of seconds to transmit.
EOText;
};

/*
 * Replay speed modifiers: -m, -p, -r, -R, -o
 */

/* note that this is really a float, but autoopts does not support float */
flag = {
    name        = multiplier;
    flags-cant  = pps;
    flags-cant  = mbps;
    flags-cant  = oneatatime;
    flags-cant  = topspeed;
    value       = x;
    arg-type    = string;
    max         = 1;
    descrip     = "Modify replay speed to a given multiple";
    doc         = <<- EOText
Specify a value to modify the packet replay speed.
Examples:
@example
    2.0 will replay traffic at twice the speed captured
    0.7 will replay traffic at 70% the speed captured
@end example
EOText;
};

flag = {
    name        = pps;
    flags-cant  = multiplier;
    flags-cant  = mbps;
    flags-cant  = oneatatime;
    flags-cant  = topspeed;
    value       = p;
    arg-type    = string;
    max         = 1;
    descrip     = "Replay packets at a given packets/sec";
    doc         = <<- EOText
Specify a value to regulate the packet replay to a specific packet-per-second rate.
Examples:
@example
    200 will replay traffic at 200 packets per second
    0.25 will replay traffic at 15 packets per minute
@end example
EOText;
};

flag = {
    name        = mbps;
    flags-cant  = multiplier;
    flags-cant  = pps;
    flags-cant  = oneatatime;
    flags-cant  = topspeed;
    value       = M;
    arg-type    = string;
    max         = 1;
    descrip     = "Replay packets at a given Mbps";
    doc         = <<- EOText
Specify a floating point value for the Mbps rate that tcpreplay
should send packets at.
EOText;
};

flag = {
    name        = topspeed;
    flags-cant  = mbps;
    flags-cant  = multiplier;
    flags-cant  = pps;
    flags-cant  = oneatatime;
    value       = t;
    descrip     = "Replay packets as fast as possible";
    doc         = "";
};

flag = {
    name        = oneatatime;
    flags-cant  = mbps;
    flags-cant  = pps;
    flags-cant  = multiplier;
    flags-cant  = topspeed;
    value       = o;
    descrip     = "Replay one packet at a time for each user input";
    doc         = <<- EOText
Allows you to step through one or more packets at a time.
EOText;
};

flag = {
    name        = pps-multi;
    arg-type    = number;
    flags-must  = pps;
    arg-default = 1;
    arg-range   = "1->";
    descrip     = "Number of packets to send for each time interval";
    doc         = <<- EOText
When trying to send packets at very high rates, the time between each packet
can be so short that it is impossible to accurately sleep for the required
period of time.  This option allows you to send multiple packets at a time,
thus allowing for longer sleep times which can be more accurately implemented.
EOText;
};

flag = {
    name        = unique-ip;
    flags-must   = loop;
#ifdef TCPREPLAY_EDIT
    flags-cant   = seed;
    flags-cant   = fuzz-seed;
#endif
    descrip     = "Modify IP addresses each loop iteration to generate unique flows";
    doc         = <<- EOText
Ensure IPv4 and IPv6 packets will be unique for each @var{--loop} iteration. 
This is done in a way that will not alter packet CRC, and therefore will generally
not affect performance. This option will significantly increase the flows/sec over
generated over multiple loop iterations.
EOText;
};

flag = {
    name        = unique-ip-loops;
    flags-must  = unique-ip;
    arg-type    = string;
    max         = 1;
    descrip     = "Number of times to loop before assigning new unique ip";
    doc         = <<- EOText
Number of @var{--loop} iterations before a new unique IP is assigned. Default
is 1. Assumes both @var{--loop} and @var{--unique-ip}.
EOText;
};

flag = {
    ifdef       = HAVE_NETMAP;
    name        = netmap;
    descrip     = "Write packets directly to netmap enabled network adapter";
    doc         = <<- EOText
This feature will detect netmap capable network drivers on Linux and BSD
systems. If detected, the network driver is bypassed for the execution
duration, and network buffers will be written to directly. This will allow
you to achieve full line rates on commodity network adapters, similar to rates
achieved by commercial network traffic generators. Note that bypassing the network
driver will disrupt other applications connected through the test interface. See
INSTALL for more information.

This feature can also be enabled by specifying an interface as 'netmap:<intf>'
or 'vale:<intf>. For example 'netmap:eth0' specifies netmap over interface eth0.
EOText;
};


flag = {
    ifdef       = HAVE_NETMAP;
    name        = nm-delay;
    arg-type    = number;
    arg-default = 10;
    descrip     = "Netmap startup delay";
    doc         = <<- EOText
Number of seconds to delay after netmap is loaded. Required to ensure interfaces
are fully up before netmap transmit. Requires netmap option. Default is 10 seconds.
EOText;
};


flag = {
    name        = no-flow-stats;
    descrip     = "Suppress printing and tracking flow count, rates and expirations";
    doc         = <<- EOText
Suppress the collection and printing of flow statistics. This option may
improve performance when not using @var{--preload-pcap} option, otherwise
its only function is to suppress printing. 

The flow feature will track and print statistics of the flows being sent. 
A flow is loosely defined as a unique combination of a 5-tuple, i.e. 
source IP, destination IP, source port, destination port and protocol.

If @var{--loop} is specified, the flows from one iteration to the next
will not be unique, unless the packets are altered. Use @var{--unique-ip}
or @var{tcpreplay-edit} to alter packets between iterations. 
EOText;
};

flag = {
    name        = flow-expiry;
    arg-type    = number;
    flags-cant  = no-flow-stats;
    arg-default = 0;
    arg-range   = "0->";
    descrip     = "Number of inactive seconds before a flow is considered expired";
    doc         = <<- EOText
This option will track and report flow expirations based on the flow idle
times. The timestamps within the pcap file are used to determine the expiry,
not the actual timestamp of the packets are replayed. For example, a value of
30 suggests that if no traffic is seen on a flow for 30 seconds, any
subsequent traffic would be considered a new flow, and thereby will increment
the flows and flows per second (fps) statistics. 

This option can be used to optimize flow timeout settings for flow products.
Setting the timeout low may lead to flows being dropped when in fact the flow
is simply slow to respond. Configuring your flow timeouts too high may
increase resources required by your flow product.

Note that using this option while replaying at higher than original speeds
can lead to inflated flows and fps counts.

Default is 0 (no expiry) and a typical value is 30-120 seconds.
EOText;
};


flag = {
    name        = pid;
    value       = P;
    descrip     = "Print the PID of tcpreplay at startup";
    flag-code   = <<- EOPid

    fprintf(stderr, "PID: %d\n", getpid());

EOPid;
    doc         = "";
};

flag = {
    name        = stats;
    arg-type    = number;
    arg-range   = "0->";
    descrip     = "Print statistics every X seconds, or every loop if '0'";
    doc         = <<- EOText
Note that timed delays are a "best effort" and long delays between
sending packets may cause equally long delays between printing statistics.
EOText;
};


flag = {
    name        = suppress-warnings;
    value       = W;
    immediate;
    descrip     = "suppress printing warning messages";
    settable;
    doc         = "";
};


flag = {
    ifdef       = HAVE_LIBXDP;
    name        = xdp;
    descrip     = "Write packets directly to AF_XDP enabled network adapter";
    doc         = <<- EOText
This feature will detect AF_XDP capable network drivers on Linux systems
that have 'libxdp-dev' and 'libbpf-dev' installed. If detected, the network
stack is bypassed and packets are sent directly to an eBPF enabled driver directly.
This will allow you to achieve full line rates on commodity network adapters, similar to rates
achieved by commercial network traffic generators.
EOText;
};


flag = {
    ifdef       = HAVE_LIBXDP;
    name        = xdp-batch-size;
    flags-cant  = oneatatime;
    flags-cant  = pps-multi;
    flags-must  = xdp;
    flags-must  = topspeed;
  arg-type    = number;
    arg-range   = "1->4096";
    descrip     = "The maximum number of packets that can be submitted to the AF_XDP TX ring at once";
    arg-default = 1;
    doc         = <<- EOText
Only allowed if sending at top speed. Values higher than 1 may improve
performance at the cost of accuracy.
EOText;
};

flag = {
    name        = version;
    value       = V;
    descrip     = "Print version information";
    flag-code   = <<- EOVersion

    fprintf(stderr, "tcpreplay version: %s (build %s)", VERSION, git_version());
#ifdef DEBUG
    fprintf(stderr, " (debug)");
#endif
#ifdef TIMESTAMP_TRACE
    fprintf(stderr, " (timestamp-trace)");
#endif
    fprintf(stderr, "\n");
    fprintf(stderr, "Copyright 2013-2026 by Fred Klassen <tcpreplay at appneta dot com> - AppNeta\n");
    fprintf(stderr, "Copyright 2000-2012 by Aaron Turner <aturner at synfin dot net>\n");
    fprintf(stderr, "The entire Tcpreplay Suite is licensed under the GPLv3\n");  
    fprintf(stderr, "Cache file supported: %s\n", CACHEVERSION);
#ifdef HAVE_LIBDNET
    fprintf(stderr, "Compiled against libdnet: %s\n", LIBDNET_VERSION);
#else
    fprintf(stderr, "Not compiled with libdnet.\n");
#endif
#ifdef HAVE_WINPCAP
    fprintf(stderr, "Compiled against winpcap: %s\n", get_pcap_version());
#elif defined HAVE_PF_RING_PCAP
    fprintf(stderr, "Compiled against PF_RING libpcap: %s\n", get_pcap_version());
#else
    fprintf(stderr, "Compiled against libpcap: %s\n", get_pcap_version());
#endif
#ifdef ENABLE_64BITS
    fprintf(stderr, "64 bit packet counters: enabled\n");
#else
    fprintf(stderr, "64 bit packet counters: disabled\n");
#endif
#ifdef ENABLE_VERBOSE
    fprintf(stderr, "Verbose printing via tcpdump: enabled\n");
#else
    fprintf(stderr, "Verbose printing via tcpdump: disabled\n");
#endif
#ifdef TCPREPLAY_EDIT
    fprintf(stderr, "Packet editing: enabled\n");
#else
    fprintf(stderr, "Packet editing: disabled\n");
#endif
#ifdef ENABLE_FRAGROUTE
    fprintf(stderr, "Fragroute engine: enabled\n");
#else
    fprintf(stderr, "Fragroute engine: disabled\n");
#endif
#if defined HAVE_NETMAP
    fprintf(stderr, "Default injection method: %s\n", sendpacket_get_method(NULL));
#else
    fprintf(stderr, "Injection method: %s\n", sendpacket_get_method(NULL));
#endif
#ifdef HAVE_NETMAP
    fprintf(stderr, "Optional injection method: netmap\n");
#else
    fprintf(stderr, "Not compiled with netmap\n");
#endif
#ifdef HAVE_LIBXDP
    fprintf(stderr, "Optional injection method: AF_XDP\n");
#else
    fprintf(stderr, "Not compiled with AF_XDP\n");
#endif
    exit(0);

EOVersion;
    doc         = "";
};

flag = {
    name        = less-help;
    value       = "h";
    immediate;
    descrip     = "Display less usage information and exit";
    flag-code   = <<- EOHelp

    USAGE(EXIT_FAILURE);

EOHelp;
    doc         = "";
};
