1 /* $NetBSD: bounce_trace_service.c,v 1.1.1.1 2009/06/23 10:08:42 tron Exp $ */ 2 3 /*++ 4 /* NAME 5 /* bounce_trace_service 3 6 /* SUMMARY 7 /* send status report to sender, server side 8 /* SYNOPSIS 9 /* #include "bounce_service.h" 10 /* 11 /* int bounce_trace_service(flags, queue_name, queue_id, encoding, 12 /* sender, char *envid, int ret, templates) 13 /* int flags; 14 /* char *queue_name; 15 /* char *queue_id; 16 /* char *encoding; 17 /* char *sender; 18 /* char *envid; 19 /* int ret; 20 /* BOUNCE_TEMPLATES *templates; 21 /* DESCRIPTION 22 /* This module implements the server side of the trace_flush() 23 /* (send delivery notice) request. The logfile 24 /* is removed after the notice is posted. 25 /* 26 /* A status report includes a prelude with human-readable text, 27 /* a DSN-style report, and the email message that was subject of 28 /* the status report. 29 /* 30 /* When a status report is sent, the sender address is the empty 31 /* address. 32 /* DIAGNOSTICS 33 /* Fatal error: error opening existing file. 34 /* BUGS 35 /* SEE ALSO 36 /* bounce(3) basic bounce service client interface 37 /* LICENSE 38 /* .ad 39 /* .fi 40 /* The Secure Mailer license must be distributed with this software. 41 /* AUTHOR(S) 42 /* Wietse Venema 43 /* IBM T.J. Watson Research 44 /* P.O. Box 704 45 /* Yorktown Heights, NY 10598, USA 46 /*--*/ 47 48 /* System library. */ 49 50 #include <sys_defs.h> 51 #include <fcntl.h> 52 #include <errno.h> 53 #include <string.h> 54 #include <ctype.h> 55 56 /* Utility library. */ 57 58 #include <msg.h> 59 #include <vstream.h> 60 61 /* Global library. */ 62 63 #include <mail_params.h> 64 #include <mail_queue.h> 65 #include <post_mail.h> 66 #include <mail_addr.h> 67 #include <mail_error.h> 68 #include <dsn_mask.h> 69 #include <deliver_request.h> /* USR_VRFY and RECORD flags */ 70 71 /* Application-specific. */ 72 73 #include "bounce_service.h" 74 75 #define STR vstring_str 76 77 /* bounce_trace_service - send a delivery status notice */ 78 79 int bounce_trace_service(int flags, char *service, char *queue_name, 80 char *queue_id, char *encoding, 81 char *recipient, char *dsn_envid, 82 int unused_dsn_ret, 83 BOUNCE_TEMPLATES *ts) 84 { 85 BOUNCE_INFO *bounce_info; 86 int bounce_status = 1; 87 VSTREAM *bounce; 88 VSTRING *new_id = vstring_alloc(10); 89 int count; 90 91 /* 92 * Initialize. Open queue file, bounce log, etc. 93 * 94 * XXX DSN The trace service produces information from the trace logfile 95 * which is used for three types of reports: 96 * 97 * a) "what-if" reports that show what would happen without actually 98 * delivering mail (sendmail -bv). 99 * 100 * b) A report of actual deliveries (sendmail -v). 101 * 102 * c) DSN NOTIFY=SUCCESS reports of successful delivery ("delivered", 103 * "expanded" or "relayed"). 104 */ 105 #define NON_DSN_FLAGS (DEL_REQ_FLAG_USR_VRFY | DEL_REQ_FLAG_RECORD) 106 107 bounce_info = bounce_mail_init(service, queue_name, queue_id, 108 encoding, dsn_envid, 109 flags & NON_DSN_FLAGS ? 110 ts->verify : ts->success); 111 112 /* 113 * XXX With multi-recipient mail some queue file recipients may have 114 * NOTIFY=SUCCESS and others not. Depending on what subset of recipients 115 * are delivered, a trace file may or may not be created. Even when the 116 * last partial delivery attempt had no NOTIFY=SUCCESS recipients, a 117 * trace file may still exist from a previous partial delivery attempt. 118 * So as long as any recipient in the original queue file had 119 * NOTIFY=SUCCESS we have to always look for the trace file and be 120 * prepared for the file not to exist. 121 * 122 * See also comments in qmgr/qmgr_active.c. 123 */ 124 if (bounce_info->log_handle == 0) { 125 if (msg_verbose) 126 msg_info("%s: no trace file -- not sending a notification", 127 queue_id); 128 bounce_mail_free(bounce_info); 129 return (0); 130 } 131 #define NULL_SENDER MAIL_ADDR_EMPTY /* special address */ 132 #define NULL_TRACE_FLAGS 0 133 134 /* 135 * Send a single bounce with a template message header, some boilerplate 136 * text that pretends that we are a polite mail system, the text with 137 * per-recipient status, and a copy of the original message. 138 * 139 * XXX DSN We use the same trace file for "what-if", "verbose delivery" and 140 * "success" delivery reports. This saves file system overhead because 141 * there are fewer potential left-over files to remove up when we create 142 * a new queue file. 143 */ 144 if ((bounce = post_mail_fopen_nowait(NULL_SENDER, recipient, 145 INT_FILT_MASK_BOUNCE, 146 NULL_TRACE_FLAGS, 147 new_id)) != 0) { 148 count = -1; 149 if (bounce_header(bounce, bounce_info, recipient, 150 NO_POSTMASTER_COPY) == 0 151 && bounce_boilerplate(bounce, bounce_info) == 0 152 && (count = bounce_diagnostic_log(bounce, bounce_info, 153 DSN_NOTIFY_OVERRIDE)) > 0 154 && bounce_header_dsn(bounce, bounce_info) == 0 155 && bounce_diagnostic_dsn(bounce, bounce_info, 156 DSN_NOTIFY_OVERRIDE) > 0) { 157 bounce_original(bounce, bounce_info, DSN_RET_HDRS); 158 bounce_status = post_mail_fclose(bounce); 159 if (bounce_status == 0) 160 msg_info("%s: sender delivery status notification: %s", 161 queue_id, STR(new_id)); 162 } else { 163 (void) vstream_fclose(bounce); 164 if (count == 0) 165 bounce_status = 0; 166 } 167 } 168 169 /* 170 * Examine the completion status. Delete the trace log file only when the 171 * status notice was posted successfully. 172 */ 173 if (bounce_status == 0 && mail_queue_remove(service, queue_id) 174 && errno != ENOENT) 175 msg_fatal("remove %s %s: %m", service, queue_id); 176 177 /* 178 * Cleanup. 179 */ 180 bounce_mail_free(bounce_info); 181 vstring_free(new_id); 182 183 return (bounce_status); 184 } 185