err.c (3462B)
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 57 srtp_err_status_t srtp_err_reporting_init(void) 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 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 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 }