summaryrefslogtreecommitdiff
path: root/src/ipcpd/normal/pol/complete.c
blob: 68f43e810396ad6bd00bc594b6890ada10285c89 (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
198
199
200
201
202
/*
 * Ouroboros - Copyright (C) 2016 - 2017
 *
 * Graph adjacency manager for IPC Process components
 *
 *    Dimitri Staessens <dimitri.staessens@intec.ugent.be>
 *    Sander Vrijders   <sander.vrijders@intec.ugent.be>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#define OUROBOROS_PREFIX "complete-graph-adjacency-manager"

#include <ouroboros/config.h>
#include <ouroboros/logs.h>
#include <ouroboros/list.h>
#include <ouroboros/qos.h>
#include <ouroboros/rib.h>

#include "ipcp.h"
#include "gam.h"
#include "ribconfig.h"

#include <string.h>
#include <stdlib.h>
#include <assert.h>

struct neighbor {
        struct list_head next;
        char *           neighbor;
};

struct complete {
        struct list_head neighbors;
        pthread_mutex_t  neighbors_lock;

        pthread_t        allocator;

        struct gam *     gam;
};

static void * allocator(void * o)
{
        qosspec_t         qs;
        ssize_t           len;
        char **           children;
        ssize_t           i;
        struct complete * complete = (struct complete *) o;

        assert(complete);
        assert(complete->gam);

        qs.delay = 0;
        qs.jitter = 0;

        /* FIXME: subscribe to members to keep the graph complete. */
        len = rib_children("/" MEMBERS_NAME, &children);
        for (i = 0; i < len; ++i) {
                if (strcmp(children[i], ipcpi.name) < 0)
                        gam_flow_alloc(complete->gam, children[i], qs);
                free(children[i]);
        }

        if (len > 0)
                free(children);

        return (void *) 0;
}

void * complete_create(struct gam * gam)
{
        struct complete * complete;

        assert(gam);

        complete = malloc(sizeof(*complete));
        if (complete == NULL)
                return NULL;

        list_head_init(&complete->neighbors);
        complete->gam = gam;

        if (pthread_mutex_init(&complete->neighbors_lock, NULL)) {
                free(complete);
                return NULL;
        }

        return (void *) complete;
}

int complete_start(void * o)
{
        struct complete * complete = (struct complete *) o;

        assert(complete);
        assert(complete->gam);

        if (pthread_create(&complete->allocator, NULL,
                           allocator, (void *) complete)) {
                pthread_mutex_destroy(&complete->neighbors_lock);
                free(complete);
                return -1;
        }

        /* FIXME: Handle flooding of the flow allocator before detaching.*/
        pthread_join(complete->allocator, NULL);

        return 0;
}

int complete_stop(void * o)
{
        (void) o;

        return 0;
}

void complete_destroy(void * o)
{
        struct list_head * p = NULL;
        struct list_head * n = NULL;
        struct complete * complete = (struct complete *) o;

        list_for_each_safe(p, n, &complete->neighbors) {
                struct neighbor * e = list_entry(p, struct neighbor, next);
                list_del(&e->next);
                free(e->neighbor);
                free(e);
        }

        pthread_mutex_destroy(&complete->neighbors_lock);

        free(complete);
}

int complete_accept_new_flow(void * o)
{
        (void) o;

        return 0;
}

int complete_accept_flow(void *                    o,
                         qosspec_t                 qs,
                         const struct conn_info * info)
{
        struct list_head * pos = NULL;
        struct neighbor * n;
        struct complete * complete = (struct complete *) o;

        (void) qs;

        assert(complete);

        pthread_mutex_lock(&complete->neighbors_lock);

        list_for_each(pos, &complete->neighbors) {
                struct neighbor * e = list_entry(pos, struct neighbor, next);
                /* FIXME: figure out union type and check name or address */
                if (strcmp(e->neighbor, info->ae.name) == 0) {
                        pthread_mutex_unlock(&complete->neighbors_lock);
                        return -1;
                }

                assert(complete);
                assert(&complete->neighbors_lock);
                assert(pos->nxt);
        }

        n = malloc(sizeof(*n));
        if (n == NULL) {
                pthread_mutex_unlock(&complete->neighbors_lock);
                return -1;
        }

        list_head_init(&n->next);

        /* FIXME: figure out union type and check name or address */
        n->neighbor = strdup(info->ae.name);
        if (n->neighbor == NULL) {
                pthread_mutex_unlock(&complete->neighbors_lock);
                free(n);
                return -1;
        }

        list_add(&n->next, &complete->neighbors);

        pthread_mutex_unlock(&complete->neighbors_lock);

        return 0;
}