/*
 * netsniff-ng - the packet sniffing beast
 * Copyright 2011 Daniel Borkmann.
 * Subject to the GPL, version 2.
 */

#include <stdint.h>
#include <string.h>
#include <netinet/in.h>

#include "patricia.h"
#include "locking.h"
#include "trie.h"
#include "ipv4.h"
#include "ipv6.h"

static struct patricia_node *tree = NULL;

static struct rwlock tree_lock;

void trie_addr_lookup(char *buff, size_t len, int ipv4, int *fd,
		      struct sockaddr_storage *addr, size_t *alen)
{
	void *data;
	size_t dlen;
	struct ipv4hdr *hdr4 = (void *) buff;
	struct ipv6hdr *hdr6 = (void *) buff;

	data = ipv4 ? (void *) &hdr4->h_daddr : (void *) &hdr6->daddr;
	dlen = ipv4 ? sizeof(hdr4->h_daddr) : sizeof(hdr6->daddr);

	if (unlikely((ipv4 && ((struct ipv4hdr *) buff)->h_version != 4) ||
		     (!ipv4 && ((struct ipv6hdr *) buff)->version  != 6))) {
		memset(addr, 0, sizeof(*addr));
		(*alen) = 0;
		(*fd) = -1;
		return;
	}

	rwlock_rd_lock(&tree_lock);
	(*fd) = ptree_search_data_exact(data, dlen, addr, alen, tree);
	rwlock_unlock(&tree_lock);
}

int trie_addr_maybe_update(char *buff, size_t len, int ipv4, int fd,
			   struct sockaddr_storage *addr, size_t alen)
{
	int ret;
	void *data;
	size_t dlen;
	struct ipv4hdr *hdr4 = (void *) buff;
	struct ipv6hdr *hdr6 = (void *) buff;

	data = ipv4 ? (void *) &hdr4->h_saddr : (void *) &hdr6->saddr;
	dlen = ipv4 ? sizeof(hdr4->h_saddr) : sizeof(hdr6->saddr);

	if (unlikely((ipv4 && ((struct ipv4hdr *) buff)->h_version != 4) ||
		     (!ipv4 && ((struct ipv6hdr *) buff)->version  != 6)))
		return -1;

	rwlock_wr_lock(&tree_lock);
	ret = ptree_add_entry(data, dlen, fd, addr, alen, &tree);
	rwlock_unlock(&tree_lock);

	return ret;
}

void trie_addr_remove(int fd)
{
	int found = 1;
	struct patricia_node *n = NULL;

	rwlock_wr_lock(&tree_lock);

	while (found) {
		ptree_get_key(fd, tree, &n);
		if (n) {
			ptree_del_entry(n->key, n->klen, &tree);
			n = NULL;
		} else
			found = 0;
	}

	rwlock_unlock(&tree_lock);
}

void trie_addr_remove_addr(struct sockaddr_storage *addr, size_t alen)
{
	int found = 1;
	struct patricia_node *n = NULL;

	rwlock_wr_lock(&tree_lock);

	while (found) {
		ptree_get_key_addr(addr, alen, tree, &n);
		if (n) {
			ptree_del_entry(n->key, n->klen, &tree);
			n = NULL;
		} else
			found = 0;
	}

	rwlock_unlock(&tree_lock);
}

void trie_init(void)
{
	rwlock_init(&tree_lock);
}

void trie_cleanup(void)
{
	rwlock_wr_lock(&tree_lock);
	ptree_free(tree);
	rwlock_unlock(&tree_lock);
	rwlock_destroy(&tree_lock);
}
/td></tr></table>
<div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='6b20cf3c0fbd242a337b15577905785bd95ca529'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><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>Mauro Carvalho Chehab &lt;mchehab@osg.samsung.com&gt;</td><td class='right'>2015-06-05 10:30:44 -0300</td></tr>
<tr><th>committer</th><td>Mauro Carvalho Chehab &lt;mchehab@osg.samsung.com&gt;</td><td class='right'>2015-06-05 11:26:43 -0300</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=6b20cf3c0fbd242a337b15577905785bd95ca529'>6b20cf3c0fbd242a337b15577905785bd95ca529</a> (<a href='/cgit.cgi/linux/net-next.git/patch/?id=6b20cf3c0fbd242a337b15577905785bd95ca529'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=6b20cf3c0fbd242a337b15577905785bd95ca529'>81b90967da7939b65fbe25b35c141ef273f69365</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=95cf60aa55d5395a10d0e67a711e42693b89fb1c'>95cf60aa55d5395a10d0e67a711e42693b89fb1c</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?id=6b20cf3c0fbd242a337b15577905785bd95ca529&amp;id2=95cf60aa55d5395a10d0e67a711e42693b89fb1c'>diff</a>)</td></tr></table>
<div class='commit-subject'>[media] rc: set IR_MAX_DURATION to 500 ms</div><div class='commit-msg'>The current definition is weird, and produce lots of sparse
warnings:

	drivers/media/i2c/cx25840/cx25840-ir.c:448 txclk_tx_s_max_pulse_width() warn: impossible condition '(ns &gt; 4294967295) =&gt; (0-u32max &gt; u32max)'
	drivers/media/i2c/cx25840/cx25840-ir.c:461 rxclk_rx_s_max_pulse_width() warn: impossible condition '(ns &gt; 4294967295) =&gt; (0-u32max &gt; u32max)'
	drivers/media/i2c/cx25840/cx25840-ir.c:706 cx25840_ir_rx_read() warn: impossible condition '(v &gt; 4294967295) =&gt; (0-u32max &gt; u32max)'
	drivers/media/pci/ivtv/ivtv-queue.c:145 ivtv_queue_move() error: we previously assumed 'steal' could be null (see line 138)
	drivers/media/rc/streamzap.c:155 sz_push_full_pulse() warn: impossible condition '(rawir.duration &gt; 4294967295) =&gt; (0-u32max &gt; u32max)'
	drivers/media/rc/streamzap.c:169 sz_push_full_pulse() warn: impossible condition '(rawir.duration &gt; 4294967295) =&gt; (0-u32max &gt; u32max)'
	drivers/media/rc/redrat3.c:325 redrat3_us_to_len() warn: impossible condition '(microsec &gt; 4294967295) =&gt; (0-u32max &gt; u32max)'
	drivers/media/rc/redrat3.c:383 redrat3_process_ir_data() warn: impossible condition '(rawir.duration &gt; 4294967295) =&gt; (0-u32max &gt; u32max)'
	drivers/media/usb/pvrusb2/pvrusb2-hdw.c:3676 pvr2_send_request_ex() error: we previously assumed 'write_data' could be null (see line 3648)
	drivers/media/usb/pvrusb2/pvrusb2-hdw.c:3829 pvr2_send_request_ex() error: we previously assumed 'read_data' could be null (see line 3649)
	drivers/media/pci/cx23885/cx23888-ir.c:463 txclk_tx_s_max_pulse_width() warn: impossible condition '(ns &gt; 4294967295) =&gt; (0-u32max &gt; u32max)'
	drivers/media/pci/cx23885/cx23888-ir.c:476 rxclk_rx_s_max_pulse_width() warn: impossible condition '(ns &gt; 4294967295) =&gt; (0-u32max &gt; u32max)'
	drivers/media/pci/cx23885/cx23888-ir.c:696 cx23888_ir_rx_read() warn: impossible condition '(v &gt; 4294967295) =&gt; (0-u32max &gt; u32max)'

Use a more realistic value for it.

Signed-off-by: Mauro Carvalho Chehab &lt;mchehab@osg.samsung.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=6b20cf3c0fbd242a337b15577905785bd95ca529'>Diffstat</a></div><table summary='diffstat' class='diffstat'>