inetdevice.h revision 324525 
1/*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013-2017 Mellanox Technologies, Ltd.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice unmodified, this list of conditions, and the following
13 *    disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 */
30
31#ifndef	_LINUX_INETDEVICE_H_
32#define	_LINUX_INETDEVICE_H_
33
34#include <linux/netdevice.h>
35
36static inline struct net_device *
37ip_dev_find(struct net *net, uint32_t addr)
38{
39	struct sockaddr_in sin;
40	struct ifaddr *ifa;
41	struct ifnet *ifp;
42
43	ifp = NULL;
44	memset(&sin, 0, sizeof(sin));
45	sin.sin_addr.s_addr = addr;
46	sin.sin_port = 0;
47	sin.sin_len = sizeof(sin);
48	sin.sin_family = AF_INET;
49	ifa = ifa_ifwithaddr((struct sockaddr *)&sin);
50	if (ifa) {
51		ifp = ifa->ifa_ifp;
52		if_ref(ifp);
53		ifa_free(ifa);
54	}
55	return (ifp);
56}
57
58static inline struct net_device *
59ip6_dev_find(struct vnet *vnet, struct in6_addr addr)
60{
61	struct sockaddr_in6 sin6;
62	struct ifaddr *ifa = NULL;
63	struct ifnet *ifp = NULL;
64	int x;
65
66	memset(&sin6, 0, sizeof(sin6));
67	sin6.sin6_addr = addr;
68	sin6.sin6_len = sizeof(sin6);
69	sin6.sin6_family = AF_INET6;
70	CURVNET_SET_QUIET(vnet);
71	if (IN6_IS_SCOPE_LINKLOCAL(&addr) ||
72	    IN6_IS_ADDR_MC_INTFACELOCAL(&addr)) {
73		/* XXX need to search all scope ID's */
74		for (x = 0; x <= V_if_index && x < 65536; x++) {
75			sin6.sin6_addr.s6_addr16[1] = htons(x);
76			ifa = ifa_ifwithaddr((struct sockaddr *)&sin6);
77			if (ifa != NULL)
78				break;
79		}
80	} else {
81		ifa = ifa_ifwithaddr((struct sockaddr *)&sin6);
82	}
83	if (ifa != NULL) {
84		ifp = ifa->ifa_ifp;
85		if_ref(ifp);
86		ifa_free(ifa);
87	}
88	CURVNET_RESTORE();
89	return (ifp);
90}
91
92#endif	/* _LINUX_INETDEVICE_H_ */
93