/*
 * netsniff-ng - the packet sniffing beast
 * Copyright 2009, 2010 Daniel Borkmann.
 * Copyright 2014, 2015 Tobias Klauser
 * Subject to the GPL, version 2.
 */

#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>

#include "hash.h"
#include "str.h"
#include "lookup.h"
#include "xmalloc.h"

static bool lookup_initialized[LT_MAX];
static struct hash_table lookup_tables[LT_MAX];
static const char * const lookup_files[] = {
	[LT_PORTS_UDP]	= ETCDIRE_STRING "/udp.conf",
	[LT_PORTS_TCP]	= ETCDIRE_STRING "/tcp.conf",
	[LT_ETHERTYPES]	= ETCDIRE_STRING "/ether.conf",
	[LT_OUI]	= ETCDIRE_STRING "/oui.conf",
};

struct lookup_entry {
	unsigned int id;
	char *str;
	struct lookup_entry *next;
};

void lookup_init(enum lookup_type which)
{
	FILE *fp;
	char buff[128], *ptr, *end;
	const char *file;
	struct hash_table *table;
	struct lookup_entry *p;
	void **pos;

	bug_on(which >= LT_MAX);
	if (lookup_initialized[which])
		return;
	table = &lookup_tables[which];
	file = lookup_files[which];

	fp = fopen(file, "r");
	if (!fp) {
		fprintf(stderr, "Cannot open %s: %s."
				"Port name resolution won't be available.\n",
				file, strerror(errno));
		return;
	}

	memset(buff, 0, sizeof(buff));

	while (fgets(buff, sizeof(buff), fp) != NULL) {
		buff[sizeof(buff) - 1] = 0;
		ptr = buff;

		p = xmalloc(sizeof(*p));
		p->id = strtol(ptr, &end, 0);
		/* not a valid line, skip */
		if (p->id == 0 && end == ptr) {
			xfree(p);
			continue;
		}

		ptr = strstr(buff, ", ");
		/* likewise */
		if (!ptr) {
			xfree(p);
			continue;
		}

		ptr += strlen(", ");
		ptr = strtrim_right(ptr, '\n');
		ptr = strtrim_right(ptr, ' ');

		p->str = xstrdup(ptr);
		p->next = NULL;

		pos = insert_hash(p->id, p, table);
		if (pos) {
			p->next = *pos;
			*pos = p;
		}

		memset(buff, 0, sizeof(buff));
	}

	fclose(fp);
	lookup_initialized[which] = true;
}

static int __lookup_cleanup_single(void *ptr)
{
	struct lookup_entry *tmp, *p = ptr;

	if (!ptr)
		return 0;

	while ((tmp = p->next)) {
		xfree(p->str);
		xfree(p);
		p = tmp;
	}

	xfree(p->str);
	xfree(p);

	return 0;
}

void lookup_cleanup(enum lookup_type which)
{
	struct hash_table *table;

	bug_on(which >= LT_MAX);
	if (!lookup_initialized[which])
		return;
	table = &lookup_tables[which];

	for_each_hash(table, __lookup_cleanup_single);
	free_hash(table);
	lookup_initialized[which] = false;
}

static inline const char *__lookup_inline(unsigned int id, struct hash_table *tbl)
{
	struct lookup_entry *entry = lookup_hash(id, tbl);

	while (entry && id != entry->id)
		entry = entry->next;

	return (entry && id == entry->id ? entry->str : NULL);
}

const char *lookup_ether_type(unsigned int id)
{
	return __lookup_inline(id, &lookup_tables[LT_ETHERTYPES]);
}

const char *lookup_port_udp(unsigned int id)
{
	return __lookup_inline(id, &lookup_tables[LT_PORTS_UDP]);
}

const char *lookup_port_tcp(unsigned int id)
{
	return __lookup_inline(id, &lookup_tables[LT_PORTS_TCP]);
}

const char *lookup_vendor(unsigned int id)
{
	return __lookup_inline(id, &lookup_tables[LT_OUI]);
}
>
<content type='text'>
Merge updates from Andrew Morton:

 - various misc bits

 - most of MM (quite a lot of MM material is awaiting the merge of
   linux-next dependencies)

 - kasan

 - printk updates

 - procfs updates

 - MAINTAINERS

 - /lib updates

 - checkpatch updates

* emailed patches from Andrew Morton &lt;akpm@linux-foundation.org&gt;: (123 commits)
  init: reduce rootwait polling interval time to 5ms
  binfmt_elf: use vmalloc() for allocation of vma_filesz
  checkpatch: don't emit unified-diff error for rename-only patches
  checkpatch: don't check c99 types like uint8_t under tools
  checkpatch: avoid multiple line dereferences
  checkpatch: don't check .pl files, improve absolute path commit log test
  scripts/checkpatch.pl: fix spelling
  checkpatch: don't try to get maintained status when --no-tree is given
  lib/ida: document locking requirements a bit better
  lib/rbtree.c: fix typo in comment of ____rb_erase_color
  lib/Kconfig.debug: make CONFIG_STRICT_DEVMEM depend on CONFIG_DEVMEM
  MAINTAINERS: add drm and drm/i915 irc channels
  MAINTAINERS: add "C:" for URI for chat where developers hang out
  MAINTAINERS: add drm and drm/i915 bug filing info
  MAINTAINERS: add "B:" for URI where to file bugs
  get_maintainer: look for arbitrary letter prefixes in sections
  printk: add Kconfig option to set default console loglevel
  printk/sound: handle more message headers
  printk/btrfs: handle more message headers
  printk/kdb: handle more message headers
  ...
</content>
</entry>
<entry>
<title>MAINTAINERS: add drm and drm/i915 irc channels</title>
<updated>2016-12-13T02:55:09+00:00</updated>
<author>
<name>Jani Nikula</name>
<email>jani.nikula@intel.com</email>
</author>
<published>2016-12-13T00:46:11+00:00</published>
<link rel='alternate' type='text/html' href='https://git.distanz.ch/cgit.cgi/linux/net-next.git/commit/?id=5fc41a70d804f93b88924bed1d2f494f3b735571'/>
<id>urn:sha1:5fc41a70d804f93b88924bed1d2f494f3b735571</id>
<content type='text'>
Link: http://lkml.kernel.org/r/1476966135-26943-4-git-send-email-jani.nikula@intel.com
Signed-off-by: Jani Nikula &lt;jani.nikula@intel.com&gt;
Reviewed-by: Andrew Donnellan &lt;andrew.donnellan@au1.ibm.com&gt;
Cc: Daniel Vetter &lt;daniel@ffwll.ch&gt;
Cc: Dave Airlie &lt;airlied@gmail.com&gt;
Cc: Joe Perches &lt;joe@perches.com&gt;
Signed-off-by: Andrew Morton &lt;akpm@linux-foundation.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
</content>
</entry>
<entry>
<title>MAINTAINERS: add "C:" for URI for chat where developers hang out</title>
<updated>2016-12-13T02:55:09+00:00</updated>
<author>
<name>Jani Nikula</name>
<email>jani.nikula@intel.com</email>
</author>
<published>2016-12-13T00:46:08+00:00</published>
<link rel='alternate' type='text/html' href='https://git.distanz.ch/cgit.cgi/linux/net-next.git/commit/?id=57599f9b879cae3c85e8646772e94ae568854319'/>
<id>urn:sha1:57599f9b879cae3c85e8646772e94ae568854319</id>
<content type='text'>
Make it easier to find the developer chat for the subsystem or driver.

Link: http://lkml.kernel.org/r/1476966135-26943-3-git-send-email-jani.nikula@intel.com
Signed-off-by: Jani Nikula &lt;jani.nikula@intel.com&gt;
Reviewed-by: Andrew Donnellan &lt;andrew.donnellan@au1.ibm.com&gt;
Cc: Daniel Vetter &lt;daniel@ffwll.ch&gt;
Cc: Dave Airlie &lt;airlied@gmail.com&gt;
Cc: Joe Perches &lt;joe@perches.com&gt;
Signed-off-by: Andrew Morton &lt;akpm@linux-foundation.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
</content>
</entry>
<entry>
<title>MAINTAINERS: add drm and drm/i915 bug filing info</title>
<updated>2016-12-13T02:55:09+00:00</updated>
<author>
<name>Jani Nikula</name>
<email>jani.nikula@intel.com</email>
</author>
<published>2016-12-13T00:46:05+00:00</published>
<link rel='alternate' type='text/html' href='https://git.distanz.ch/cgit.cgi/linux/net-next.git/commit/?id=51b06f9f84eb05f98755fd2d6293063a1a23980c'/>
<id>urn:sha1:51b06f9f84eb05f98755fd2d6293063a1a23980c</id>
<content type='text'>
Link: http://lkml.kernel.org/r/1476966135-26943-2-git-send-email-jani.nikula@intel.com
Signed-off-by: Jani Nikula &lt;jani.nikula@intel.com&gt;
Reviewed-by: Andrew Donnellan &lt;andrew.donnellan@au1.ibm.com&gt;
Cc: Daniel Vetter &lt;daniel@ffwll.ch&gt;
Cc: Dave Airlie &lt;airlied@gmail.com&gt;
Cc: Joe Perches &lt;joe@perches.com&gt;
Signed-off-by: Andrew Morton &lt;akpm@linux-foundation.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
</content>
</entry>
<entry>
<title>MAINTAINERS: add "B:" for URI where to file bugs</title>
<updated>2016-12-13T02:55:09+00:00</updated>
<author>
<name>Jani Nikula</name>
<email>jani.nikula@intel.com</email>
</author>
<published>2016-12-13T00:46:02+00:00</published>
<link rel='alternate' type='text/html' href='https://git.distanz.ch/cgit.cgi/linux/net-next.git/commit/?id=2de2bd95f45639b8e21b1da7f72f506d43400b4d'/>
<id>urn:sha1:2de2bd95f45639b8e21b1da7f72f506d43400b4d</id>
<content type='text'>
Different subsystems and drivers have different preferences for where to
file bugs and what information to include.  Add "B:" entry for
specifying the URI for the bug tracker directly, a web page for detailed
info on filing bugs, or a mailto: URI.

Link: http://lkml.kernel.org/r/1476966135-26943-1-git-send-email-jani.nikula@intel.com
Signed-off-by: Jani Nikula &lt;jani.nikula@intel.com&gt;
Reviewed-by: Andrew Donnellan &lt;andrew.donnellan@au1.ibm.com&gt;
Acked-by: Daniel Vetter &lt;daniel@ffwll.ch&gt;
Cc: Joe Perches &lt;joe@perches.com&gt;
Signed-off-by: Andrew Morton &lt;akpm@linux-foundation.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
</content>
</entry>
<entry>
<title>Merge branch 'x86-idle-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip</title>
<updated>2016-12-12T22:55:04+00:00</updated>
<author>
<name>Linus Torvalds</name>
<email>torvalds@linux-foundation.org</email>
</author>
<published>2016-12-12T22:55:04+00:00</published>
<link rel='alternate' type='text/html' href='https://git.distanz.ch/cgit.cgi/linux/net-next.git/commit/?id=212f30008a284a9312d95dad6cc237ff81173d73'/>
<id>urn:sha1:212f30008a284a9312d95dad6cc237ff81173d73</id>
<content type='text'>
Pull x86 idle updates from Ingo Molnar:
 "There were two bigger changes in this development cycle:

   - remove idle notifiers:

       32 files changed, 74 insertions(+), 803 deletions(-)

     These notifiers were of questionable value and the main usecase,
     the i7300 driver, was essentially unmaintained and can be removed,
     plus modern power management concepts don't need the callback - so
     use this golden opportunity and get rid of this opaque and fragile
     callback from a latency sensitive code path.

     (Len Brown, Thomas Gleixner)

   - improve the AMD Erratum 400 workaround that used high overhead MSR
     polling in the idle loop (Borisla Petkov, Thomas Gleixner)"

* 'x86-idle-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: Remove empty idle.h header
  x86/amd: Simplify AMD E400 aware idle routine
  x86/amd: Check for the C1E bug post ACPI subsystem init
  x86/bugs: Separate AMD E400 erratum and C1E bug
  x86/cpufeature: Provide helper to set bugs bits
  x86/idle: Remove enter_idle(), exit_idle()
  x86: Remove x86_test_and_clear_bit_percpu()
  x86/idle: Remove is_idle flag
  x86/idle: Remove idle_notifier
  i7300_idle: Remove this driver
</content>
</entry>