/*
 * 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,
};
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>Roger Quadros &lt;rogerq@ti.com&gt;</td><td class='right'>2016-09-29 08:32:55 +0100</td></tr>
<tr><th>committer</th><td>Russell King &lt;rmk+kernel@armlinux.org.uk&gt;</td><td class='right'>2016-09-29 16:57:44 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=d248220f0465b818887baa9829e691fe662b2c5e'>d248220f0465b818887baa9829e691fe662b2c5e</a> (<a href='/cgit.cgi/linux/net-next.git/patch/?id=d248220f0465b818887baa9829e691fe662b2c5e'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=d248220f0465b818887baa9829e691fe662b2c5e'>a7eba33d46ee26de6a5d6738b0ba4c870d0f3f04</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=ba6dea4f7cedb4b1c17e36f4087675d817c2e24b'>ba6dea4f7cedb4b1c17e36f4087675d817c2e24b</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?id=d248220f0465b818887baa9829e691fe662b2c5e&amp;id2=ba6dea4f7cedb4b1c17e36f4087675d817c2e24b'>diff</a>)</td></tr></table>
<div class='commit-subject'>ARM: 8617/1: dma: fix dma_max_pfn()</div><div class='commit-msg'>Since commit 6ce0d2001692 ("ARM: dma: Use dma_pfn_offset for dma address translation"),
dma_to_pfn() already returns the PFN with the physical memory start offset
so we don't need to add it again.

This fixes USB mass storage lock-up problem on systems that can't do DMA
over the entire physical memory range (e.g.) Keystone 2 systems with 4GB RAM
can only do DMA over the first 2GB. [K2E-EVM].

What happens there is that without this patch SCSI layer sets a wrong
bounce buffer limit in scsi_calculate_bounce_limit() for the USB mass
storage device. dma_max_pfn() evaluates to 0x8fffff and bounce_limit
is set to 0x8fffff000 whereas maximum DMA'ble physical memory on Keystone 2
is 0x87fffffff. This results in non DMA'ble pages being given to the
USB controller and hence the lock-up.

NOTE: in the above case, USB-SCSI-device's dma_pfn_offset was showing as 0.
This should have really been 0x780000 as on K2e, LOWMEM_START is 0x80000000
and HIGHMEM_START is 0x800000000. DMA zone is 2GB so dma_max_pfn should be
0x87ffff. The incorrect dma_pfn_offset for the USB storage device is because
USB devices are not correctly inheriting the dma_pfn_offset from the
USB host controller. This will be fixed by a separate patch.

Fixes: 6ce0d2001692 ("ARM: dma: Use dma_pfn_offset for dma address translation")
Cc: stable@vger.kernel.org
Cc: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
Cc: Santosh Shilimkar &lt;santosh.shilimkar@oracle.com&gt;
Cc: Arnd Bergmann &lt;arnd@arndb.de&gt;
Cc: Olof Johansson &lt;olof@lixom.net&gt;
Cc: Catalin Marinas &lt;catalin.marinas@arm.com&gt;
Cc: Linus Walleij &lt;linus.walleij@linaro.org&gt;
Reported-by: Grygorii Strashko &lt;grygorii.strashko@ti.com&gt;
Signed-off-by: Roger Quadros &lt;rogerq@ti.com&gt;
Signed-off-by: Russell King &lt;rmk+kernel@arm.linux.org.uk&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=d248220f0465b818887baa9829e691fe662b2c5e'>Diffstat</a></div><table summary='diffstat' class='diffstat'>