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CONTRIB: tcploop: update the usage output

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This commit is contained in:
Willy Tarreau 2016-11-12 17:53:16 +01:00
parent 869c759153
commit 9557bacfff
1 changed files with 68 additions and 1 deletions
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69
contrib/tcploop/tcploop.c
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@ -1,3 +1,29 @@
/*
* TCP client and server for bug hunting
*
* Copyright (C) 2016 Willy Tarreau <w@1wt.eu>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include <sys/resource.h>
#include <sys/select.h>
#include <sys/types.h>
@ -58,7 +84,48 @@ __attribute__((noreturn)) void die(int code, const char *format, ...)
/* display the usage message and exit with the code */
__attribute__((noreturn)) void usage(int code, const char *arg0)
{
die(code, "Usage: %s [<ip>:]port [action*]\n", arg0);
die(code,
"Usage : %s [options]* [<ip>:]port [<action>*]\n"
"\n"
"options :\n"
" -v : verbose\n"
" -t|-tt|-ttt : show time (msec / relative / absolute)\n"
"actions :\n"
" L[<backlog>] : Listens to ip:port and optionally sets backlog\n"
" Note: fd=socket,bind(fd),listen(fd)\n"
" C : Connects to ip:port\n"
" Note: fd=socket,connect(fd)\n"
" A[<count>] : Accepts <count> incoming sockets and closes count-1\n"
" Note: fd=accept(fd)\n"
" G : disable lingering\n"
" T : set TCP_NODELAY\n"
" Q : disable TCP Quick-ack\n"
" R[<size>] : Read this amount of bytes. 0=infinite. unset=any amount.\n"
" S[<size>] : Send this amount of bytes. 0=infinite. unset=any amount.\n"
" E[<size>] : Echo this amount of bytes. 0=infinite. unset=any amount.\n"
" W[<time>] : Wait for any event on the socket, maximum <time> ms\n"
" P[<time>] : Pause for <time> ms (100 by default)\n"
" I : wait for Input data to be present (POLLIN)\n"
" O : wait for Output queue to be empty (POLLOUT + TIOCOUTQ)\n"
" F : FIN : shutdown(SHUT_WR)\n"
" N<max> : fork New process, limited to <max> concurrent (default 1)\n"
"\n"
"It's important to note that a single FD is used at once and that Accept\n"
"replaces the listening FD with the accepted one. Thus always do it after\n"
"a fork if other connections have to be accepted.\n"
"\n"
"After a fork, we loop back to the beginning and silently skip L/C if the\n"
"main socket already exists.\n"
"\n"
"Example dummy HTTP request drain server :\n"
" tcploop 8001 L W N20 A R S10 [ F K ]\n"
"\n"
"Example large bandwidth HTTP request drain server :\n"
" tcploop 8001 L W N20 A R S0 [ F K ]\n"
"\n"
"Example TCP client with pauses at each step :\n"
" tcploop 8001 C T W P100 S10 O P100 R S10 O R G K\n"
"", arg0);
}
void dolog(const char *format, ...)