1 /* $OpenBSD: esc.c,v 1.5 2016/09/03 22:16:39 gilles Exp $ */ 2 3 /* 4 * Copyright (c) 2014 Gilles Chehade <gilles@poolp.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/queue.h> 20 #include <sys/tree.h> 21 #include <sys/socket.h> 22 23 #include <netinet/in.h> 24 #include <netdb.h> 25 #include <stdio.h> 26 #include <limits.h> 27 28 #include "smtpd-defines.h" 29 #include "smtpd-api.h" 30 31 static struct escode { 32 enum enhanced_status_code code; 33 const char *description; 34 } esc[] = { 35 /* 0.0 */ 36 { ESC_OTHER_STATUS, "Other/Undefined" }, 37 38 /* 1.x */ 39 { ESC_OTHER_ADDRESS_STATUS, "Other/Undefined address status" }, 40 { ESC_BAD_DESTINATION_MAILBOX_ADDRESS, "Bad destination mailbox address" }, 41 { ESC_BAD_DESTINATION_SYSTEM_ADDRESS, "Bad destination system address" }, 42 { ESC_BAD_DESTINATION_MAILBOX_ADDRESS_SYNTAX, "Bad destination mailbox address syntax" }, 43 { ESC_DESTINATION_MAILBOX_ADDRESS_AMBIGUOUS, "Destination mailbox address ambiguous" }, 44 { ESC_DESTINATION_ADDRESS_VALID, "Destination address valid" }, 45 { ESC_DESTINATION_MAILBOX_HAS_MOVED, "Destination mailbox has moved, No forwarding address" }, 46 { ESC_BAD_SENDER_MAILBOX_ADDRESS_SYNTAX, "Bad sender's mailbox address syntax" }, 47 { ESC_BAD_SENDER_SYSTEM_ADDRESS, "Bad sender's system address syntax" }, 48 49 /* 2.x */ 50 { ESC_OTHER_MAILBOX_STATUS, "Other/Undefined mailbox status" }, 51 { ESC_MAILBOX_DISABLED, "Mailbox disabled, not accepting messages" }, 52 { ESC_MAILBOX_FULL, "Mailbox full" }, 53 { ESC_MESSAGE_LENGTH_TOO_LARGE, "Message length exceeds administrative limit" }, 54 { ESC_MAILING_LIST_EXPANSION_PROBLEM, "Mailing list expansion problem" }, 55 56 /* 3.x */ 57 { ESC_OTHER_MAIL_SYSTEM_STATUS, "Other/Undefined mail system status" }, 58 { ESC_MAIL_SYSTEM_FULL, "Mail system full" }, 59 { ESC_SYSTEM_NOT_ACCEPTING_MESSAGES, "System not accepting network messages" }, 60 { ESC_SYSTEM_NOT_CAPABLE_OF_SELECTED_FEATURES, "System not capable of selected features" }, 61 { ESC_MESSAGE_TOO_BIG_FOR_SYSTEM, "Message too big for system" }, 62 { ESC_SYSTEM_INCORRECTLY_CONFIGURED, "System incorrectly configured" }, 63 64 /* 4.x */ 65 { ESC_OTHER_NETWORK_ROUTING_STATUS, "Other/Undefined network or routing status" }, 66 { ESC_NO_ANSWER_FROM_HOST, "No answer from host" }, 67 { ESC_BAD_CONNECTION, "Bad connection" }, 68 { ESC_DIRECTORY_SERVER_FAILURE, "Directory server failure" }, 69 { ESC_UNABLE_TO_ROUTE, "Unable to route" }, 70 { ESC_MAIL_SYSTEM_CONGESTION, "Mail system congestion" }, 71 { ESC_ROUTING_LOOP_DETECTED, "Routing loop detected" }, 72 { ESC_DELIVERY_TIME_EXPIRED, "Delivery time expired" }, 73 74 /* 5.x */ 75 { ESC_INVALID_RECIPIENT, "Invalid recipient" }, 76 { ESC_INVALID_COMMAND, "Invalid command" }, 77 { ESC_SYNTAX_ERROR, "Syntax error" }, 78 { ESC_TOO_MANY_RECIPIENTS, "Too many recipients" }, 79 { ESC_INVALID_COMMAND_ARGUMENTS, "Invalid command arguments" }, 80 { ESC_WRONG_PROTOCOL_VERSION, "Wrong protocol version" }, 81 82 /* 6.x */ 83 { ESC_OTHER_MEDIA_ERROR, "Other/Undefined media error" }, 84 { ESC_MEDIA_NOT_SUPPORTED, "Media not supported" }, 85 { ESC_CONVERSION_REQUIRED_AND_PROHIBITED, "Conversion required and prohibited" }, 86 { ESC_CONVERSION_REQUIRED_BUT_NOT_SUPPORTED, "Conversion required but not supported" }, 87 { ESC_CONVERSION_WITH_LOSS_PERFORMED, "Conversion with loss performed" }, 88 { ESC_CONVERSION_FAILED, "Conversion failed" }, 89 90 /* 7.x */ 91 { ESC_OTHER_SECURITY_STATUS, "Other/Undefined security status" }, 92 { ESC_DELIVERY_NOT_AUTHORIZED_MESSAGE_REFUSED, "Delivery not authorized, message refused" }, 93 { ESC_MAILING_LIST_EXPANSION_PROHIBITED, "Mailing list expansion prohibited" }, 94 { ESC_SECURITY_CONVERSION_REQUIRED_NOT_POSSIBLE,"Security conversion required but not possible" }, 95 { ESC_SECURITY_FEATURES_NOT_SUPPORTED, "Security features not supported" }, 96 { ESC_CRYPTOGRAPHIC_FAILURE, "Cryptographic failure" }, 97 { ESC_CRYPTOGRAPHIC_ALGORITHM_NOT_SUPPORTED, "Cryptographic algorithm not supported" }, 98 { ESC_MESSAGE_TOO_BIG_FOR_SYSTEM, "Message integrity failure" }, 99 }; 100 101 const char * 102 esc_code(enum enhanced_status_class class, enum enhanced_status_code code) 103 { 104 static char buffer[6]; 105 106 (void)snprintf(buffer, sizeof buffer, "%d.%d.%d", class, code / 10, code % 10); 107 return buffer; 108 109 } 110 111 const char * 112 esc_description(enum enhanced_status_code code) 113 { 114 uint32_t i; 115 116 for (i = 0; i < nitems(esc); ++i) 117 if (code == esc[i].code) 118 return esc[i].description; 119 return "Other/Undefined"; 120 } 121