/*
 * netsniff-ng - the packet sniffing beast
 * Copyright 2009, 2010 Daniel Borkmann.
 * Subject to the GPL, version 2.
 */

#include <stdio.h>
#include <stdint.h>
#include <endian.h>
#include <netinet/in.h>    /* for ntohs() */
#include <asm/byteorder.h>

#include "proto.h"
#include "protos.h"
#include "lookup.h"
#include "built_in.h"
#include "pkt_buff.h"

struct tcphdr {
	uint16_t source;
	uint16_t dest;
	uint32_t seq;
	uint32_t ack_seq;
#if defined(__LITTLE_ENDIAN_BITFIELD)
	__extension__ uint16_t res1:4,
			       doff:4,
			       fin:1,
			       syn:1,
			       rst:1,
			       psh:1,
			       ack:1,
			       urg:1,
			       ece:1,
			       cwr:1;
#elif defined(__BIG_ENDIAN_BITFIELD)
	__extension__ uint16_t doff:4,
			       res1:4,
			       cwr:1,
			       ece:1,
			       urg:1,
			       ack:1,
			       psh:1,
			       rst:1,
			       syn:1,
			       fin:1;
#else
# error  "Adjust your <asm/byteorder.h> defines"
#endif
	uint16_t window;
	uint16_t check;
	uint16_t urg_ptr;
} __packed;

#define tprintf_flag(flag, str, prev)	({		\
	bool __r = false;					\
	if (flag) {					\
		tprintf("%s%s", (prev) ? " " : "", str);	\
		__r = true;					\
	}							\
	__r;							\
})

static void tcp(struct pkt_buff *pkt)
{
	struct tcphdr *tcp = (struct tcphdr *) pkt_pull(pkt, sizeof(*tcp));
	uint16_t src, dest;
	const char *src_name, *dest_name;
	bool v = false;

	if (tcp == NULL)
		return;

	src = ntohs(tcp->source);
	dest = ntohs(tcp->dest);

	src_name = lookup_port_tcp(src);
	dest_name = lookup_port_tcp(dest);

	tprintf(" [ TCP ");
	tprintf("Port (%u", src);
	if (src_name)
		tprintf(" (%s%s%s)", colorize_start(bold), src_name,
			colorize_end());
	tprintf(" => %u", dest);
	if (dest_name)
		tprintf(" (%s%s%s)", colorize_start(bold), dest_name,
			colorize_end());
	tprintf("), ");
	tprintf("SN (0x%x), ", ntohl(tcp->seq));
	tprintf("AN (0x%x), ", ntohl(tcp->ack_seq));
	tprintf("DataOff (%u), ", tcp->doff);
	tprintf("Res (%u), ", tcp->res1);
	tprintf("Flags (");
	v = tprintf_flag(tcp->fin, "FIN", v);
	v = tprintf_flag(tcp->syn, "SYN", v);
	v = tprintf_flag(tcp->rst, "RST", v);
	v = tprintf_flag(tcp->psh, "PSH", v);
	v = tprintf_flag(tcp->ack, "ACK", v);
	v = tprintf_flag(tcp->urg, "URG", v);
	v = tprintf_flag(tcp->ece, "ECE", v);
	v = tprintf_flag(tcp->cwr, "CWR", v);
	tprintf("), ");
	tprintf("Window (%u), ", ntohs(tcp->window));
	tprintf("CSum (0x%.4x), ", ntohs(tcp->check));
	tprintf("UrgPtr (%u)", ntohs(tcp->urg_ptr));
	tprintf(" ]\n");
}

static void tcp_less(struct pkt_buff *pkt)
{
	struct tcphdr *tcp = (struct tcphdr *) pkt_pull(pkt, sizeof(*tcp));
	uint16_t src, dest;
	const char *src_name, *dest_name;

	if (tcp == NULL)
		return;

	src = ntohs(tcp->source);
	dest = ntohs(tcp->dest);

	src_name = lookup_port_tcp(src);
	dest_name = lookup_port_tcp(dest);

	tprintf(" TCP %u", src);
	if(src_name)
		tprintf("(%s%s%s)", colorize_start(bold), src_name,
			colorize_end());
	tprintf("/%u", dest);
	if(dest_name)
		tprintf("(%s%s%s)", colorize_start(bold), dest_name,
			colorize_end());
	tprintf(" F%s",colorize_start(bold));
	if (tcp->fin)
		tprintf(" FIN");
	if (tcp->syn)
		tprintf(" SYN");
	if (tcp->rst)
		tprintf(" RST");
	if (tcp->psh)
		tprintf(" PSH");
	if (tcp->ack)
		tprintf(" ACK");
	if (tcp->urg)
		tprintf(" URG");
	if (tcp->ece)
		tprintf(" ECE");
	if (tcp->cwr)
		tprintf(" CWR");
	tprintf("%s Win %u S/A 0x%x/0x%x", colorize_end(),
		ntohs(tcp->window), ntohl(tcp->seq), ntohl(tcp->ack_seq));
}

struct protocol tcp_ops = {
	.key = 0x06,
	.print_full = tcp,
	.print_less = tcp_less,
};
 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>Thomas Gleixner &lt;tglx@linutronix.de&gt;</td><td class='right'>2016-10-07 15:55:13 +0200</td></tr>
<tr><th>committer</th><td>Thomas Gleixner &lt;tglx@linutronix.de&gt;</td><td class='right'>2016-10-08 12:18:36 +0200</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=df610d678893c85b82d3a68eea0d87dd4e03e615'>df610d678893c85b82d3a68eea0d87dd4e03e615</a> (<a href='/cgit.cgi/linux/net-next.git/patch/?id=df610d678893c85b82d3a68eea0d87dd4e03e615'>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=df610d678893c85b82d3a68eea0d87dd4e03e615'>4bfbbcd9389c7157e4bfbf5a1762a7af19a1a70b</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=f3bf1dbe64b62a2058dd1944c00990df203e8e7a'>f3bf1dbe64b62a2058dd1944c00990df203e8e7a</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=df610d678893c85b82d3a68eea0d87dd4e03e615&amp;id2=f3bf1dbe64b62a2058dd1944c00990df203e8e7a'>diff</a>)</td></tr></table>
<div class='commit-subject'>x86/apic: Prevent pointless warning messages</div><div class='commit-msg'>Markus reported that he sees new warnings:

  APIC: NR_CPUS/possible_cpus limit of 4 reached.  Processor 4/0x84 ignored.
  APIC: NR_CPUS/possible_cpus limit of 4 reached.  Processor 5/0x85 ignored.

This comes from the recent persistant cpuid - nodeid changes. The code
which emits the warning has been called prior to these changes only for
enabled processors. Now it's called for disabled processors as well to get
the possible cpu accounting correct. So if the kernel is compiled for the
number of actual available/enabled CPUs and the BIOS reports disabled CPUs
as well then the above warnings are printed.

That's a pointless exercise as it only makes sense if there are more CPUs
enabled than the kernel supports.

Nake the warning conditional on enabled processors so we are back to the
state before these changes.

Fixes: 8f54969dc8d6 ("x86/acpi: Introduce persistent storage for cpuid &lt;-&gt; apicid mapping") 
Reported-and-tested-by: Markus Trippelsdorf &lt;markus@trippelsdorf.de&gt;
Cc: One Thousand Gnomes &lt;gnomes@lxorguk.ukuu.org.uk&gt;
Cc: Dou Liyang &lt;douly.fnst@cn.fujitsu.com&gt;
Cc: linux-acpi@vger.kernel.org
Cc: Gu Zheng &lt;guz.fnst@cn.fujitsu.com&gt;
Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1610071549330.19804@nanos
Signed-off-by: Thomas Gleixner &lt;tglx@linutronix.de&gt;

</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=df610d678893c85b82d3a68eea0d87dd4e03e615'>Diffstat</a></div><table summary='diffstat' class='diffstat'>