1 /*
2 * Copyright (c) 2014-2020 by Farsight Security, Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define _GNU_SOURCE
18 #define _BSD_SOURCE
19 #define _DEFAULT_SOURCE
20
21 #include <sys/types.h>
22 #include <inttypes.h>
23 #include <stdlib.h>
24 #include <string.h>
25 #include <time.h>
26
27 #include "defs.h"
28 #include "time.h"
29 #include "globals.h"
30 #include "ns_ttl.h"
31
32 /* time_cmp -- compare two absolute timestamps, give -1, 0, or 1.
33 */
34 int
time_cmp(u_long a,u_long b)35 time_cmp(u_long a, u_long b) {
36 if (a < b)
37 return -1;
38 if (a > b)
39 return 1;
40 return 0;
41 }
42
43 /* time_str -- format one (possibly zero) timestamp (returns static string)
44 */
45 const char *
time_str(u_long x,bool iso8601fmt)46 time_str(u_long x, bool iso8601fmt) {
47 static char ret[sizeof "yyyy-mm-ddThh:mm:ssZ"];
48
49 if (x == 0) {
50 strcpy(ret, "0");
51 } else {
52 time_t t = (time_t)x;
53 struct tm result, *y = gmtime_r(&t, &result);
54
55 strftime(ret, sizeof ret, iso8601fmt ? "%FT%TZ" : "%F %T", y);
56 }
57 return ret;
58 }
59
60 /* time_get -- parse and return one (possibly relative) timestamp.
61 */
62 int
time_get(const char * src,u_long * dst)63 time_get(const char *src, u_long *dst) {
64 struct tm tt;
65 long long ll;
66 u_long t;
67 char *ep;
68
69 memset(&tt, 0, sizeof tt);
70 if (((ep = strptime(src, "%F %T", &tt)) != NULL && *ep == '\0') ||
71 ((ep = strptime(src, "%F", &tt)) != NULL && *ep == '\0'))
72 {
73 *dst = (u_long)(timegm(&tt));
74 return 1;
75 }
76 ll = strtoll(src, &ep, 10);
77 if (*src != '\0' && *ep == '\0') {
78 if (ll < 0)
79 *dst = (u_long)startup_time.tv_sec -
80 (u_long)imaxabs(ll);
81 else
82 *dst = (u_long)ll;
83 return 1;
84 }
85 if (ns_parse_ttl(src, &t) == 0) {
86 *dst = (u_long)startup_time.tv_sec - t;
87 return 1;
88 }
89 return 0;
90 }
91
92