/*
 * netsniff-ng - the packet sniffing beast
 * Copyright 2012 Markus Amend <markus@netsniff-ng.org>, Deutsche Flugsicherung GmbH
 * Subject to the GPL, version 2.
 *
 * IPv6 Routing Header described in RFC2460
 */

#include <stdio.h>
#include <stdint.h>
#include <netinet/in.h>    /* for ntohs() and "struct in6_addr" */
#include <arpa/inet.h>     /* for inet_ntop() */

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

#define ROUTING_HEADER_TYPE_0	0x00

struct routinghdr {
	uint8_t h_next_header;
	uint8_t h_hdr_ext_len;
	uint8_t h_routing_type;
	uint8_t h_segments_left;
} __packed;

struct routinghdr_0 {
	uint32_t reserved;
	uint32_t addresses[0];
} __packed;

static void dissect_routinghdr_type_0(struct pkt_buff *pkt,
				      ssize_t *data_len, int less)
{
	uint8_t num_addr;
	char address[INET6_ADDRSTRLEN];
	struct in6_addr *addr;
	struct routinghdr_0 *routing_0;

  	routing_0 = (struct routinghdr_0 *) pkt_pull(pkt, sizeof(*routing_0));
	*data_len -= sizeof(*routing_0);
	if (routing_0 == NULL || *data_len > pkt_len(pkt) || *data_len < 0)
		return;

	if (less) {
		tprintf("Addresses (%lu)", *data_len / sizeof(struct in6_addr));
		return;
	}

	tprintf("Res (0x%x)", routing_0->reserved);

	num_addr = *data_len / sizeof(*addr);

	while (num_addr--) {
		addr = (struct in6_addr *) pkt_pull(pkt, sizeof(*addr));
		*data_len -= sizeof(*addr);
		if (addr == NULL || *data_len > pkt_len(pkt) || *data_len < 0)
			return;

		tprintf("\n\t   Address: %s",
			inet_ntop(AF_INET6, addr, address,
				  sizeof(address)));
	}
}

static inline void dissect_routinghdr_type_0_norm(struct pkt_buff *pkt,
						  ssize_t *data_len)
{
	dissect_routinghdr_type_0(pkt, data_len, 0);
}

static inline void dissect_routinghdr_type_0_less(struct pkt_buff *pkt,
						  ssize_t *data_len)
{
	dissect_routinghdr_type_0(pkt, data_len, 1);
}

static void routing(struct pkt_buff *pkt)
{
	uint16_t hdr_ext_len;
	ssize_t data_len;
	struct routinghdr *routing;

	routing = (struct routinghdr *) pkt_pull(pkt, sizeof(*routing));
	if (routing == NULL)
		return;

	/* Total Header Length in Bytes */
	hdr_ext_len = (routing->h_hdr_ext_len + 1) * 8;
	/* Data length in Bytes */
	data_len = hdr_ext_len - sizeof(*routing);

	tprintf("\t [ Routing ");
	tprintf("NextHdr (%u), ", routing->h_next_header);
	if (data_len > pkt_len(pkt) || data_len < 0){
		tprintf("HdrExtLen (%u, %u Bytes %s), ", routing->h_hdr_ext_len,
		      hdr_ext_len, colorize_start_full(black, red)
		      "invalid" colorize_end());
		      return;
	}
	tprintf("HdrExtLen (%u, %u Bytes), ", routing->h_hdr_ext_len,
		hdr_ext_len);
	tprintf("Type (%u), ", routing->h_routing_type);
	tprintf("Left (%u), ", routing->h_segments_left);

	switch (routing->h_routing_type) {
	case ROUTING_HEADER_TYPE_0:
		dissect_routinghdr_type_0_norm(pkt, &data_len);
		break;
	default:
		tprintf("Type %u is unknown", routing->h_routing_type);
	}

	tprintf(" ]\n");

	if (data_len > pkt_len(pkt) || data_len < 0)
		return;

	pkt_pull(pkt, data_len);
	pkt_set_proto(pkt, &eth_lay3, routing->h_next_header);
}

static void routing_less(struct pkt_buff *pkt)
{
	uint16_t hdr_ext_len;
	ssize_t data_len;
	struct routinghdr *routing;

	routing = (struct routinghdr *) pkt_pull(pkt, sizeof(*routing));
	if (routing == NULL)
		return;

	/* Total Header Length in Bytes */
	hdr_ext_len = (routing->h_hdr_ext_len + 1) * 8;
	/* Data length in Bytes */
	data_len = hdr_ext_len - sizeof(*routing);
	if (data_len > pkt_len(pkt) || data_len < 0)
		return;

	tprintf(" Routing ");
	
	switch (routing->h_routing_type) {
	case ROUTING_HEADER_TYPE_0:
		dissect_routinghdr_type_0_less(pkt, &data_len);
		break;
	default:
		tprintf("Type %u is unknown", routing->h_routing_type);
	}

	if (data_len > pkt_len(pkt) || data_len < 0)
		return;

	pkt_pull(pkt, data_len);
	pkt_set_proto(pkt, &eth_lay3, routing->h_next_header);
}

struct protocol ipv6_routing_ops = {
	.key = 0x2B,
	.print_full = routing,
	.print_less = routing_less,
};
on><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>Thomas Gleixner &lt;tglx@linutronix.de&gt;</td><td class='right'>2017-01-31 09:37:34 +0100</td></tr>
<tr><th>committer</th><td>Thomas Gleixner &lt;tglx@linutronix.de&gt;</td><td class='right'>2017-01-31 21:47:58 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/media?h=nds-private-remove&amp;id=0becc0ae5b42828785b589f686725ff5bc3b9b25'>0becc0ae5b42828785b589f686725ff5bc3b9b25</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/media?id=0becc0ae5b42828785b589f686725ff5bc3b9b25'>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=0becc0ae5b42828785b589f686725ff5bc3b9b25'>be6d0e1f37c38ed0a7dd5da2d4b1e93f0fb43101</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/media?h=nds-private-remove&amp;id=0becc0ae5b42828785b589f686725ff5bc3b9b25'>include/media</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/media?h=nds-private-remove&amp;id=24c2503255d35c269b67162c397a1a1c1e02f6ce'>24c2503255d35c269b67162c397a1a1c1e02f6ce</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/media?h=nds-private-remove&amp;id=0becc0ae5b42828785b589f686725ff5bc3b9b25&amp;id2=24c2503255d35c269b67162c397a1a1c1e02f6ce'>diff</a>)</td></tr></table>
<div class='commit-subject'>x86/mce: Make timer handling more robust</div><div class='commit-msg'>Erik reported that on a preproduction hardware a CMCI storm triggers the
BUG_ON in add_timer_on(). The reason is that the per CPU MCE timer is
started by the CMCI logic before the MCE CPU hotplug callback starts the
timer with add_timer_on(). So the timer is already queued which triggers
the BUG.

Using add_timer_on() is pretty pointless in this code because the timer is
strictlty per CPU, initialized as pinned and all operations which arm the
timer happen on the CPU to which the timer belongs.

Simplify the whole machinery by using mod_timer() instead of add_timer_on()
which avoids the problem because mod_timer() can handle already queued
timers. Use __start_timer() everywhere so the earliest armed expiry time is
preserved.

Reported-by: Erik Veijola &lt;erik.veijola@intel.com&gt;
Tested-by: Borislav Petkov &lt;bp@alien8.de&gt;
Signed-off-by: Thomas Gleixner &lt;tglx@linutronix.de&gt;
Reviewed-by: Borislav Petkov &lt;bp@alien8.de&gt;
Cc: Tony Luck &lt;tony.luck@intel.com&gt;
Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701310936080.3457@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=0becc0ae5b42828785b589f686725ff5bc3b9b25'>Diffstat</a> (limited to 'include/media')</div><table summary='diffstat' class='diffstat'>