/*
 * Mausezahn - A fast versatile traffic generator
 * Copyright (C) 2008-2010 Herbert Haas
 * 
 * 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, see http://www.gnu.org/licenses/gpl-2.0.html
 * 
*/

#include "mz.h"
#include "mops.h"


// Remove 802.1Q tags from packet mp
//  
// k indicates which tag to be removed (1..n)
// k=0 means: remove all tags!
// 
// RETURN VALUE: 1 upon failure, 0 upon success
int mops_dot1Q_remove (struct mops *mp, int k)
{
	int a,b,n;
     
	if (k==0) {
		mp->dot1Q_s=0;
		mp->use_dot1Q=0;
		return 0;
	}
   
	n = mp->dot1Q_s/4; // n = total number of tags
	if (k>n) return 1;
	
	if (k==1) { // only delete the single tag
		mp->dot1Q_s=0;
		mp->use_dot1Q=0;
		return 0;
	}
   
	// we have more than one tag:
	// 
	if (k==n) { // remove last tag (of several)
		mp->dot1Q_s -=4;
		return 0;
	}
	
	// remove some non-ending tag: 0, 1, 2, 3
	a = (k-1)*4; // target 
	b = k*4;     // source (what should be copied)
	memcpy(&mp->dot1Q[a], &mp->dot1Q[b], (n-k)*4);
	mp->dot1Q_s -=4;
	
	return 0;
}


// Unset CFI in tag k where k=1..n
int mops_dot1Q_nocfi (struct mops *mp, int k)
{
	int n;
	
	n = mp->dot1Q_s/4; // n = total number of tags
	if (k>n) return 1;
	
	mp->dot1Q[((k-1)*4)+2] &=0xef; // unset CFI (0xef = 1110 1111)
	return 0;
}


// Set CFI in tag k where k=1..n
int mops_dot1Q_cfi (struct mops *mp, int k)
{
	int n;
	
	n = mp->dot1Q_s/4; // n = total number of tags
	if (k>n) return 1;
	
	mp->dot1Q[((k-1)*4)+2] |=0x10; // set CFI (0x10 = 0001 0000)
	return 0;
}


// Assign 802.1Q tag with 
//   v ... VLAN  
//   c ... CoS 
//   i ... tag position (starting from zero!)
//   
//   m ... modification: 1 = dot1Q_s is not changed
//   
// NOTE:
//   When called from for-loop to add all tags the total size dot1Q_s
//   is updated continuously, therefore use m=1.
//   
//   But when changing a particular tag within an existing 802.1Q stack
//   the total number of tags does not change, therefore use m=0.
//   
// RETURN VALUE: 0 upon success, 1 upon failure
//  
int mops_dot1Q (struct mops *mp, int i, int m, u_int16_t v, u_int16_t c)
{
	u_int8_t *ptr, c8;
   
	if (i>=MAX_MOPS_DOT1Q_TAGS) return 1;  // max number of tags, see definitions in mops.h
	if ((v>4095)||(c>7)) return 1;         // greater values do not make sense
	
	// Format: 0x8100 CoS-CFI-VLAN
	// where c=CoS, v=VLAN
	c8 = (u_int8_t) c;
	mp->dot1Q[4*i+0]= 0x81;
	mp->dot1Q[4*i+1]= 0x00;
	ptr = (u_int8_t*) &v;
	mp->dot1Q[4*i+3]=*ptr;
	mp->dot1Q[4*i+2]=*(ptr+1);
	mp->dot1Q[4*i+2]^= (c8 << 5);
	
	if (m) {
		mp->dot1Q_s=4*(1+i);  // NOTE: dot1Q_s = current tag position + 1
		if (mp->dot1Q_s) mp->use_dot1Q = 1;
	}
	
	return 0;
}

>command-list.txt</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-12 21:58:13 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-12 21:58:13 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/command-list.txt?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/perf/command-list.txt?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>f63906f41699c8e38af9d12b063e2ceab0286ef2</a> /<a href='/cgit.cgi/linux/net-next.git/tree/tools/perf/command-list.txt?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>tools/perf/command-list.txt</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/command-list.txt?id=e34bac726d27056081d0250c0e173e4b155aa340'>e34bac726d27056081d0250c0e173e4b155aa340</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/perf/command-list.txt?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba&amp;id2=e34bac726d27056081d0250c0e173e4b155aa340'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/command-list.txt?id=868c97a846a73e937d835b09b8c885a69df50ec8'>868c97a846a73e937d835b09b8c885a69df50ec8</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/perf/command-list.txt?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba&amp;id2=868c97a846a73e937d835b09b8c885a69df50ec8'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'docs-4.10' of git://git.lwn.net/linux<span class='decoration'><a class='deco' href='/cgit.cgi/linux/net-next.git/commit/tools/perf/command-list.txt?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>HEAD</a><a class='branch-deco' href='/cgit.cgi/linux/net-next.git/log/tools/perf/command-list.txt'>master</a></span></div><div class='commit-msg'>Pull documentation update from Jonathan Corbet:
 "These are the documentation changes for 4.10.

  It's another busy cycle for the docs tree, as the sphinx conversion
  continues. Highlights include:

   - Further work on PDF output, which remains a bit of a pain but
     should be more solid now.

   - Five more DocBook template files converted to Sphinx. Only 27 to
     go... Lots of plain-text files have also been converted and
     integrated.

   - Images in binary formats have been replaced with more
     source-friendly versions.

   - Various bits of organizational work, including the renaming of
     various files discussed at the kernel summit.

   - New documentation for the device_link mechanism.

  ... and, of course, lots of typo fixes and small updates"

* tag 'docs-4.10' of git://git.lwn.net/linux: (193 commits)
  dma-buf: Extract dma-buf.rst
  Update Documentation/00-INDEX
  docs: 00-INDEX: document directories/files with no docs
  docs: 00-INDEX: remove non-existing entries
  docs: 00-INDEX: add missing entries for documentation files/dirs
  docs: 00-INDEX: consolidate process/ and admin-guide/ description
  scripts: add a script to check if Documentation/00-INDEX is sane
  Docs: change sh -&gt; awk in REPORTING-BUGS
  Documentation/core-api/device_link: Add initial documentation
  core-api: remove an unexpected unident
  ppc/idle: Add documentation for powersave=off
  Doc: Correct typo, "Introdution" =&gt; "Introduction"
  Documentation/atomic_ops.txt: convert to ReST markup
  Documentation/local_ops.txt: convert to ReST markup
  Documentation/assoc_array.txt: convert to ReST markup
  docs-rst: parse-headers.pl: cleanup the documentation
  docs-rst: fix media cleandocs target
  docs-rst: media/Makefile: reorganize the rules
  docs-rst: media: build SVG from graphviz files
  docs-rst: replace bayer.png by a SVG image
  ...
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=e7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba'>Diffstat</a> (limited to 'tools/perf/command-list.txt')</div><table summary='diffstat' class='diffstat'>