1/*
2 * Copyright 2010 Cisco Systems, Inc.  All rights reserved.
3 *
4 * This program is free software; you may redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
9 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
10 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
11 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
12 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
13 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
14 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
15 * SOFTWARE.
16 *
17 */
18
19#include <linux/kernel.h>
20#include <linux/errno.h>
21#include <linux/types.h>
22#include <linux/slab.h>
23
24#include "vnic_vic.h"
25
26struct vic_provinfo *vic_provinfo_alloc(gfp_t flags, const u8 *oui,
27	const u8 type)
28{
29	struct vic_provinfo *vp;
30
31	if (!oui)
32		return NULL;
33
34	vp = kzalloc(VIC_PROVINFO_MAX_DATA, flags);
35	if (!vp)
36		return NULL;
37
38	memcpy(vp->oui, oui, sizeof(vp->oui));
39	vp->type = type;
40	vp->length = htonl(sizeof(vp->num_tlvs));
41
42	return vp;
43}
44
45void vic_provinfo_free(struct vic_provinfo *vp)
46{
47	kfree(vp);
48}
49
50int vic_provinfo_add_tlv(struct vic_provinfo *vp, u16 type, u16 length,
51	const void *value)
52{
53	struct vic_provinfo_tlv *tlv;
54
55	if (!vp || !value)
56		return -EINVAL;
57
58	if (ntohl(vp->length) + offsetof(struct vic_provinfo_tlv, value) +
59		length > VIC_PROVINFO_MAX_TLV_DATA)
60		return -ENOMEM;
61
62	tlv = (struct vic_provinfo_tlv *)((u8 *)vp->tlv +
63		ntohl(vp->length) - sizeof(vp->num_tlvs));
64
65	tlv->type = htons(type);
66	tlv->length = htons(length);
67	memcpy(tlv->value, value, length);
68
69	vp->num_tlvs = htonl(ntohl(vp->num_tlvs) + 1);
70	vp->length = htonl(ntohl(vp->length) +
71		offsetof(struct vic_provinfo_tlv, value) + length);
72
73	return 0;
74}
75
76size_t vic_provinfo_size(struct vic_provinfo *vp)
77{
78	return vp ?  ntohl(vp->length) + sizeof(*vp) - sizeof(vp->num_tlvs) : 0;
79}
80