/* Copyright (c) 2016 Facebook
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 */
#define KBUILD_MODNAME "foo"
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/in.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <uapi/linux/bpf.h>
#include "bpf_helpers.h"

#define DEFAULT_PKTGEN_UDP_PORT	9
#define IP_MF			0x2000
#define IP_OFFSET		0x1FFF

static inline int ip_is_fragment(struct __sk_buff *ctx, __u64 nhoff)
{
	return load_half(ctx, nhoff + offsetof(struct iphdr, frag_off))
		& (IP_MF | IP_OFFSET);
}

SEC("ldabs")
int handle_ingress(struct __sk_buff *skb)
{
	__u64 troff = ETH_HLEN + sizeof(struct iphdr);

	if (load_half(skb, offsetof(struct ethhdr, h_proto)) != ETH_P_IP)
		return 0;
	if (load_byte(skb, ETH_HLEN + offsetof(struct iphdr, protocol)) != IPPROTO_UDP ||
	    load_byte(skb, ETH_HLEN) != 0x45)
		return 0;
	if (ip_is_fragment(skb, ETH_HLEN))
		return 0;
	if (load_half(skb, troff + offsetof(struct udphdr, dest)) == DEFAULT_PKTGEN_UDP_PORT)
		return TC_ACT_SHOT;
	return 0;
}
char _license[] SEC("license") = "GPL";
packet-loop-back</option>
<option value='packet-rx-pump-back'>packet-rx-pump-back</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>net-next plumbings</td><td class='sub right'>Tobias Klauser</td></tr></table>
<table class='tabs'><tr><td>
<a href='/cgit.cgi/linux/net-next.git/?h=nds-private-remove'>summary</a><a href='/cgit.cgi/linux/net-next.git/refs/?h=nds-private-remove&amp;id=a5c02f668c36c05fbbb29d157507be4868ecd176'>refs</a><a class='active' href='/cgit.cgi/linux/net-next.git/log/net/sctp/tsnmap.c?h=nds-private-remove'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/net/sctp/tsnmap.c?h=nds-private-remove&amp;id=a5c02f668c36c05fbbb29d157507be4868ecd176'>tree</a><a href='/cgit.cgi/linux/net-next.git/commit/net/sctp/tsnmap.c?h=nds-private-remove&amp;id=a5c02f668c36c05fbbb29d157507be4868ecd176'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/net/sctp/tsnmap.c?h=nds-private-remove&amp;id=a5c02f668c36c05fbbb29d157507be4868ecd176'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/net/sctp/tsnmap.c'>
<input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='a5c02f668c36c05fbbb29d157507be4868ecd176'/><select name='qt'>
<option value='grep'>log msg</option>
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</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=a5c02f668c36c05fbbb29d157507be4868ecd176'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/net?h=nds-private-remove&amp;id=a5c02f668c36c05fbbb29d157507be4868ecd176'>net</a>/<a href='/cgit.cgi/linux/net-next.git/log/net/sctp?h=nds-private-remove&amp;id=a5c02f668c36c05fbbb29d157507be4868ecd176'>sctp</a>/<a href='/cgit.cgi/linux/net-next.git/log/net/sctp/tsnmap.c?h=nds-private-remove&amp;id=a5c02f668c36c05fbbb29d157507be4868ecd176'>tsnmap.c</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/net/sctp/tsnmap.c?h=nds-private-remove&amp;id=a5c02f668c36c05fbbb29d157507be4868ecd176&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
'><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>Johannes Berg &lt;johannes.berg@intel.com&gt;</td><td class='right'>2017-01-26 17:15:44 +0100</td></tr>
<tr><th>committer</th><td>Johannes Berg &lt;johannes.berg@intel.com&gt;</td><td class='right'>2017-01-26 18:03:09 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/6lowpan/nhc.c?h=nds-private-remove&amp;id=228c8c6b1f4376788e9d5ab00d50b10228eb40d3'>228c8c6b1f4376788e9d5ab00d50b10228eb40d3</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/6lowpan/nhc.c?id=228c8c6b1f4376788e9d5ab00d50b10228eb40d3'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=228c8c6b1f4376788e9d5ab00d50b10228eb40d3'>dfd7010fa9480284fe72bb2c4ab50a5225792a10</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/6lowpan/nhc.c?h=nds-private-remove&amp;id=228c8c6b1f4376788e9d5ab00d50b10228eb40d3'>net/6lowpan/nhc.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/6lowpan/nhc.c?h=nds-private-remove&amp;id=731977e97b3697454a862fec656c2561eabc0b87'>731977e97b3697454a862fec656c2561eabc0b87</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/6lowpan/nhc.c?h=nds-private-remove&amp;id=228c8c6b1f4376788e9d5ab00d50b10228eb40d3&amp;id2=731977e97b3697454a862fec656c2561eabc0b87'>diff</a>)</td></tr></table>
<div class='commit-subject'>wireless: define cipher/AKM suites using a macro</div><div class='commit-msg'>The spec writes cipher/AKM suites as something like 00-0F-AC:9,
but the part after the colon isn't hex, it's decimal, so that
we've already had a few mistakes (in other code, or unmerged
patches) to e.g. write 0x000FAC10 instead of 0x000FAC0A.

Use a macro to avoid that problem.

Reviewed-by: Luca Coelho &lt;luciano.coelho@intel.com&gt;
Signed-off-by: Johannes Berg &lt;johannes.berg@intel.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=228c8c6b1f4376788e9d5ab00d50b10228eb40d3'>Diffstat</a> (limited to 'net/6lowpan/nhc.c')</div><table summary='diffstat' class='diffstat'>