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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