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 	}, *b;
35 	size_t i;
36 
37 	for (i = 0; i < sizeof(backends)/sizeof(backends[0]); ++i) {
38 		b = &backends[i];
39 		if (!strcmp(type, b->name))
40 			goto found;
41 	}
42 	log_warn("unknown table type %s", type);
43 	return -1;
44 
45 found:
46 	if (b->open == NULL) {
47 		log_warn("can't open table %s (type %s)",
48 		    name, b->name);
49 		return -1;
50 	}
51 
52 	t = xcalloc(1, sizeof(*t));
53 	strlcpy(t->t_name, name, sizeof(t->t_name));
54 	if (path != NULL)
55 		strlcpy(t->t_path, path, sizeof(t->t_path));
56 	t->t_backend = b;
57 
58 	if (t->t_backend->open(t) == -1)
59 		fatal("can't open table %s (type %s)",
60 		    name, path);
61 
62 	entry = xcalloc(1, sizeof(*entry));
63 	entry->table = t;
64 	SIMPLEQ_INSERT_HEAD(&conf->table_head, entry, entry);
65 	return 0;
66 }
67 
68 int
69 table_add(struct table *t, const char *key, const char *val)
70 {
71 	if (t->t_backend->add == NULL) {
72 		log_warn("can't add to table %s (type %s)",
73 		    t->t_name, t->t_backend->name);
74 		return -1;
75 	}
76 
77 	return t->t_backend->add(t, key, val);
78 }
79 
80 int
81 table_lookup(struct table *t, const char *key, char **ret_val)
82 {
83 	if (t->t_backend->lookup == NULL) {
84 		log_warn("can't lookup table %s (type %s)",
85 		    t->t_name, t->t_backend->name);
86 		return -1;
87 	}
88 
89 	return t->t_backend->lookup(t, key, ret_val);
90 }
91 
92 void
93 table_close(struct table *t)
94 {
95 	if (t->t_backend->close != NULL)
96 		t->t_backend->close(t);
97 }