1 /*
2 * err.c
3 *
4 * error status reporting functions
5 *
6 * David A. McGrew
7 * Cisco Systems, Inc.
8 */
9 /*
10 *
11 * Copyright(c) 2001-2017 Cisco Systems, Inc.
12 * All rights reserved.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 *
18 * Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 *
21 * Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials provided
24 * with the distribution.
25 *
26 * Neither the name of the Cisco Systems, Inc. nor the names of its
27 * contributors may be used to endorse or promote products derived
28 * from this software without specific prior written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
31 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
32 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
33 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
34 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
35 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
36 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
37 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
41 * OF THE POSSIBILITY OF SUCH DAMAGE.
42 *
43 */
44
45 #ifdef HAVE_CONFIG_H
46 #include <config.h>
47 #endif
48
49 #include "err.h"
50 #include "datatypes.h"
51 #include <string.h>
52
53 /* srtp_err_file is the FILE to which errors are reported */
54
55 static FILE *srtp_err_file = NULL;
56
srtp_err_reporting_init()57 srtp_err_status_t srtp_err_reporting_init()
58 {
59 #ifdef ERR_REPORTING_STDOUT
60 srtp_err_file = stdout;
61 #elif defined(ERR_REPORTING_FILE)
62 /* open file for error reporting */
63 srtp_err_file = fopen(ERR_REPORTING_FILE, "w");
64 if (srtp_err_file == NULL) {
65 return srtp_err_status_init_fail;
66 }
67 #endif
68
69 return srtp_err_status_ok;
70 }
71
72 static srtp_err_report_handler_func_t *srtp_err_report_handler = NULL;
73
srtp_install_err_report_handler(srtp_err_report_handler_func_t func)74 srtp_err_status_t srtp_install_err_report_handler(
75 srtp_err_report_handler_func_t func)
76 {
77 srtp_err_report_handler = func;
78 return srtp_err_status_ok;
79 }
80
srtp_err_report(srtp_err_reporting_level_t level,const char * format,...)81 void srtp_err_report(srtp_err_reporting_level_t level, const char *format, ...)
82 {
83 char msg[512];
84 va_list args;
85 if (srtp_err_file != NULL) {
86 va_start(args, format);
87 vfprintf(srtp_err_file, format, args);
88 va_end(args);
89 }
90 if (srtp_err_report_handler != NULL) {
91 va_start(args, format);
92 if (vsnprintf(msg, sizeof(msg), format, args) > 0) {
93 /* strip trailing \n, callback should not have one */
94 size_t l = strlen(msg);
95 if (l && msg[l - 1] == '\n') {
96 msg[l - 1] = '\0';
97 }
98 srtp_err_report_handler(level, msg);
99 /*
100 * NOTE, need to be carefull, there is a potential that
101 * octet_string_set_to_zero() could
102 * call srtp_err_report() in the future, leading to recursion
103 */
104 octet_string_set_to_zero(msg, sizeof(msg));
105 }
106 va_end(args);
107 }
108 }
109