3 * Various handy server-only utilities
5 * (c) 2001 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of Trivial IP Encryption (TrIPE).
12 * TrIPE is free software: you can redistribute it and/or modify it under
13 * the terms of the GNU General Public License as published by the Free
14 * Software Foundation; either version 3 of the License, or (at your
15 * option) any later version.
17 * TrIPE is distributed in the hope that it will be useful, but WITHOUT
18 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
22 * You should have received a copy of the GNU General Public License
23 * along with TrIPE. If not, see <https://www.gnu.org/licenses/>.
26 /*----- Header files ------------------------------------------------------*/
30 /*----- Global variables --------------------------------------------------*/
32 octet buf_i[PKBUFSZ], buf_o[PKBUFSZ], buf_t[PKBUFSZ], buf_u[PKBUFSZ];
34 /*----- Main code ---------------------------------------------------------*/
36 /* --- @timestr@ --- *
38 * Arguments: @time_t t@ = a time to convert
40 * Returns: A pointer to a textual representation of the time.
42 * Use: Converts a time to a textual representation. Corrupts
46 const char *timestr(time_t t)
52 strftime((char *)buf_u, sizeof(buf_u), "%Y-%m-%dT%H:%M:%S", tm);
53 return ((const char *)buf_u);
56 /* --- @mystrieq@ --- *
58 * Arguments: @const char *x, *y@ = two strings
60 * Returns: True if @x@ and @y are equal, up to case.
63 int mystrieq(const char *x, const char *y)
66 if (!*x && !*y) return (1);
67 if (tolower((unsigned char)*x) != tolower((unsigned char)*y))
73 /* --- @seq_reset@ --- *
75 * Arguments: @seqwin *s@ = sequence-checking window
79 * Use: Resets a sequence number window.
82 void seq_reset(seqwin *s) { s->seq = 0; s->win = 0; }
84 /* --- @seq_check@ --- *
86 * Arguments: @seqwin *s@ = sequence-checking window
87 * @uint32 q@ = sequence number to check
88 * @const char *service@ = service to report message from
90 * Returns: Zero on success, nonzero if the sequence number was bad.
92 * Use: Checks a sequence number against the window, updating things
96 int seq_check(seqwin *s, uint32 q, const char *service)
102 a_warn(service, "replay", "old-sequence", A_END);
105 if (q >= s->seq + SEQ_WINSZ) {
106 n = q - (s->seq + SEQ_WINSZ - 1);
113 qbit = 1 << (q - s->seq);
115 a_warn(service, "replay", "duplicated-sequence", A_END);
122 /*----- That's all, folks -------------------------------------------------*/