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/* $OpenBSD: esc.c,v 1.4 2015/10/14 21:02:11 gilles Exp $ */
/*
* Copyright (c) 2014 Gilles Chehade <gilles@poolp.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/queue.h>
#include <sys/tree.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <stdio.h>
#include <limits.h>
#include "smtpd-defines.h"
#include "smtpd-api.h"
static struct escode {
enum enhanced_status_code code;
const char *description;
} esc[] = {
/* 0.0 */
{ ESC_OTHER_STATUS, "Other/Undefined" },
/* 1.x */
{ ESC_OTHER_ADDRESS_STATUS, "Other/Undefined address status" },
{ ESC_BAD_DESTINATION_MAILBOX_ADDRESS, "Bad destination mailbox address" },
{ ESC_BAD_DESTINATION_SYSTEM_ADDRESS, "Bad destination system address" },
{ ESC_BAD_DESTINATION_MAILBOX_ADDRESS_SYNTAX, "Bad destination mailbox address syntax" },
{ ESC_DESTINATION_MAILBOX_ADDRESS_AMBIGUOUS, "Destination mailbox address ambiguous" },
{ ESC_DESTINATION_ADDRESS_VALID, "Destination address valid" },
{ ESC_DESTINATION_MAILBOX_HAS_MOVED, "Destination mailbox has moved, No forwarding address" },
{ ESC_BAD_SENDER_MAILBOX_ADDRESS_SYNTAX, "Bad sender's mailbox address syntax" },
{ ESC_BAD_SENDER_SYSTEM_ADDRESS, "Bad sender's system address syntax" },
/* 2.x */
{ ESC_OTHER_MAILBOX_STATUS, "Other/Undefined mailbox status" },
{ ESC_MAILBOX_DISABLED, "Mailbox disabled, not accepting messages" },
{ ESC_MAILBOX_FULL, "Mailbox full" },
{ ESC_MESSAGE_LENGTH_TOO_LARGE, "Message length exceeds administrative limit" },
{ ESC_MAILING_LIST_EXPANSION_PROBLEM, "Mailing list expansion problem" },
/* 3.x */
{ ESC_OTHER_MAIL_SYSTEM_STATUS, "Other/Undefined mail system status" },
{ ESC_MAIL_SYSTEM_FULL, "Mail system full" },
{ ESC_SYSTEM_NOT_ACCEPTING_MESSAGES, "System not accepting network messages" },
{ ESC_SYSTEM_NOT_CAPABLE_OF_SELECTED_FEATURES, "System not capable of selected features" },
{ ESC_MESSAGE_TOO_BIG_FOR_SYSTEM, "Message too big for system" },
{ ESC_SYSTEM_INCORRECTLY_CONFIGURED, "System incorrectly configured" },
/* 4.x */
{ ESC_OTHER_NETWORK_ROUTING_STATUS, "Other/Undefined network or routing status" },
{ ESC_NO_ANSWER_FROM_HOST, "No answer from host" },
{ ESC_BAD_CONNECTION, "Bad connection" },
{ ESC_DIRECTORY_SERVER_FAILURE, "Directory server failure" },
{ ESC_UNABLE_TO_ROUTE, "Unable to route" },
{ ESC_MAIL_SYSTEM_CONGESTION, "Mail system congestion" },
{ ESC_ROUTING_LOOP_DETECTED, "Routing loop detected" },
{ ESC_DELIVERY_TIME_EXPIRED, "Delivery time expired" },
/* 5.x */
{ ESC_INVALID_RECIPIENT, "Invalid recipient" },
{ ESC_INVALID_COMMAND, "Invalid command" },
{ ESC_SYNTAX_ERROR, "Syntax error" },
{ ESC_TOO_MANY_RECIPIENTS, "Too many recipients" },
{ ESC_INVALID_COMMAND_ARGUMENTS, "Invalid command arguments" },
{ ESC_WRONG_PROTOCOL_VERSION, "Wrong protocol version" },
/* 6.x */
{ ESC_OTHER_MEDIA_ERROR, "Other/Undefined media error" },
{ ESC_MEDIA_NOT_SUPPORTED, "Media not supported" },
{ ESC_CONVERSION_REQUIRED_AND_PROHIBITED, "Conversion required and prohibited" },
{ ESC_CONVERSION_REQUIRED_BUT_NOT_SUPPORTED, "Conversion required but not supported" },
{ ESC_CONVERSION_WITH_LOSS_PERFORMED, "Conversion with loss performed" },
{ ESC_CONVERSION_FAILED, "Conversion failed" },
/* 7.x */
{ ESC_OTHER_SECURITY_STATUS, "Other/Undefined security status" },
{ ESC_DELIVERY_NOT_AUTHORIZED_MESSAGE_REFUSED, "Delivery not authorized, message refused" },
{ ESC_MAILING_LIST_EXPANSION_PROHIBITED, "Mailing list expansion prohibited" },
{ ESC_SECURITY_CONVERSION_REQUIRED_NOT_POSSIBLE,"Security conversion required but not possible" },
{ ESC_SECURITY_FEATURES_NOT_SUPPORTED, "Security features not supported" },
{ ESC_CRYPTOGRAPHIC_FAILURE, "Cryptographic failure" },
{ ESC_CRYPTOGRAPHIC_ALGORITHM_NOT_SUPPORTED, "Cryptographic algorithm not supported" },
{ ESC_MESSAGE_TOO_BIG_FOR_SYSTEM, "Message integrity failure" },
};
#if 0
struct esc_map {
uint8_t code;
const char *description;
};
static struct esc_map esc_class[] = {
{ 2, "Success" },
{ 4, "Persistent Transient Failure"},
{ 5, "Permanent Failure" },
};
static struct esc_map esc_subclass[] = {
{ 0, "Other/Undefined" },
{ 1, "Addressing Status" },
{ 2, "Mailbox Status" },
{ 3, "Mail System Status" },
{ 4, "Network and Routing Status" },
{ 5, "Mail Delivery Protocol Status" },
{ 6, "Message Content or Media Status" },
{ 7, "Security or Policy Status" },
};
#endif
const char *
esc_code(enum enhanced_status_class class, enum enhanced_status_code code)
{
static char buffer[6];
(void)snprintf(buffer, sizeof buffer, "%d.%d.%d", class, code / 10, code % 10);
return buffer;
}
const char *
esc_description(enum enhanced_status_code code)
{
uint32_t i;
for (i = 0; i < nitems(esc); ++i)
if (code == esc[i].code)
return esc[i].description;
return "Other/Undefined";
}
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