summaryrefslogtreecommitdiffstats
path: root/src/vnet/adj/adj_delegate.c
blob: 1cc7c4b94bd4b032761598106db1960a42a0af0e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
/*
 * Copyright (c) 2016 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <vnet/adj/adj_delegate.h>
#include <vnet/adj/adj.h>
#include <vnet/adj/adj_internal.h>

/*
 * The per-type vector of virtual function tables
 */
static adj_delegate_vft_t *ad_vfts;

/**
 * The value of the last dynamically allocated delegeate value
 */
static adj_delegate_type_t ad_max_id = ADJ_DELEGATE_BFD;

static adj_delegate_t *
adj_delegate_find_i (const ip_adjacency_t *adj,
                     adj_delegate_type_t type,
                     u32 *index)
{
    adj_delegate_t **delegate;
    int ii;

    ii = 0;
    vec_foreach(delegate, adj->ia_delegates)
    {
	if ((*delegate)->ad_type == type)
	{
            if (NULL != index)
                *index = ii;

	    return (*delegate);
	}
	else
	{
	    ii++;
	}
    }

    return (NULL);
}

adj_delegate_t *
adj_delegate_get (const ip_adjacency_t *adj,
                  adj_delegate_type_t type)
{
    return (adj_delegate_find_i(adj, type, NULL));
}

void
adj_delegate_remove (adj_index_t ai,
                     adj_delegate_type_t type)
{
    ip_adjacency_t *adj;
    adj_delegate_t *aed;
    u32 index = ~0;

    adj = adj_get(ai);
    aed = adj_delegate_find_i(adj, type, &index);

    ASSERT(NULL != aed);

    vec_del1(adj->ia_delegates, index);
}

static int
adj_delegate_cmp_for_sort (void * v1,
                           void * v2)
{
    adj_delegate_t **delegate1 = v1, **delegate2 = v2;

    return ((*delegate1)->ad_type - (*delegate2)->ad_type);
}

static void
adj_delegate_init (ip_adjacency_t *adj,
                   adj_delegate_type_t adt,
                   adj_delegate_t *aed)

{
    aed->ad_adj_index = adj_get_index(adj);
    aed->ad_type = adt;

    vec_add1(adj->ia_delegates, aed);
    vec_sort_with_function(adj->ia_delegates,
			   adj_delegate_cmp_for_sort);
}

int
adj_delegate_add (ip_adjacency_t *adj,
                  adj_delegate_type_t adt,
                  adj_delegate_t *ad)
{
    adj_delegate_t *delegate;

    delegate = adj_delegate_get(adj, adt);

    if (NULL == delegate)
    {
	adj_delegate_init(adj, adt, ad);
    }
    else
    {
        return (-1);
    }

    return (0);
}

void
adj_delegate_adj_deleted (ip_adjacency_t *adj)
{
    adj_delegate_t **delegate;

    vec_foreach(delegate, adj->ia_delegates)
    {
        if (ad_vfts[(*delegate)->ad_type].adv_adj_deleted)
        {
            ad_vfts[(*delegate)->ad_type].adv_adj_deleted(*delegate);
        }
    }

    vec_reset_length(adj->ia_delegates);
}

u8*
adj_delegate_format (u8* s, ip_adjacency_t *adj)
{
    adj_delegate_t **aed;

    vec_foreach(aed, adj->ia_delegates)
    {
        if (ad_vfts[(*aed)->ad_type].adv_format)
        {
            s = format(s, "{");
            s = ad_vfts[(*aed)->ad_type].adv_format(*aed, s);
            s = format(s, "}");
        }
        else
        {
            s = format(s, "{unknown delegate}");
        }
    }

    return (s);
}

/**
 * adj_delegate_register_type
 *
 * Register the function table for a given type
 */
void
adj_delegate_register_type (adj_delegate_type_t type,
			    const adj_delegate_vft_t *vft)
{
    /*
     * assert that one only registration is made per-node type
     */
    if (vec_len(ad_vfts) > type)
        ASSERT(NULL == ad_vfts[type].adv_adj_deleted);

    vec_validate(ad_vfts, type);
    ad_vfts[type] = *vft;
}

/**
 * adj_delegate_register_new_type
 *
 * Register the function table for a new type
 */
adj_delegate_type_t
adj_delegate_register_new_type (const adj_delegate_vft_t *vft)
{
    adj_delegate_type_t type;

    type = ++ad_max_id;

    vec_validate(ad_vfts, type);
    ad_vfts[type] = *vft;

    return (type);
}