1 /*
2  * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include "compat.h"
18 
19 #include <stdlib.h>
20 #include <string.h>
21 
22 #include "log.h"
23 #include "table.h"
24 #include "utils.h"
25 
26 int
27 table_open(struct kd_conf *conf, const char *name, const char *type,
28     const char *path)
29 {
30 	struct table *t;
31 	struct kd_tables_conf *entry;
32 	struct table_backend *backends[] = {
33 		&table_static,
34 		NULL,
35 	}, *b;
36 	size_t i;
37 
38 	for (i = 0; backends[i] != NULL; ++i) {
39 		b = backends[i];
40 		if (!strcmp(type, b->name))
41 			goto found;
42 	}
43 	log_warn("unknown table type %s", type);
44 	return -1;
45 
46 found:
47 	if (b->open == NULL) {
48 		log_warn("can't open table %s (type %s)",
49 		    name, b->name);
50 		return -1;
51 	}
52 
53 	t = xcalloc(1, sizeof(*t));
54 	strlcpy(t->t_name, name, sizeof(t->t_name));
55 	if (path != NULL)
56 		strlcpy(t->t_path, path, sizeof(t->t_path));
57 	t->t_backend = b;
58 
59 	if (t->t_backend->open(t) == -1)
60 		fatal("can't open table %s (type %s)",
61 		    name, path);
62 
63 	entry = xcalloc(1, sizeof(*entry));
64 	entry->table = t;
65 	STAILQ_INSERT_HEAD(&conf->table_head, entry, entry);
66 	return 0;
67 }
68 
69 int
70 table_add(struct table *t, const char *key, const char *val)
71 {
72 	if (t->t_backend->add == NULL) {
73 		log_warn("can't add to table %s (type %s)",
74 		    t->t_name, t->t_backend->name);
75 		return -1;
76 	}
77 
78 	return t->t_backend->add(t, key, val);
79 }
80 
81 int
82 table_lookup(struct table *t, const char *key, char **ret_val)
83 {
84 	if (t->t_backend->lookup == NULL) {
85 		log_warn("can't lookup table %s (type %s)",
86 		    t->t_name, t->t_backend->name);
87 		return -1;
88 	}
89 
90 	return t->t_backend->lookup(t, key, ret_val);
91 }
92 
93 void
94 table_close(struct table *t)
95 {
96 	if (t->t_backend->close != NULL)
97 		t->t_backend->close(t);
98 }