1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
/*++
/* NAME
/* showq_json 8
/* SUMMARY
/* JSON queue status formatter
/* SYNOPSIS
/* void showq_json(
/* VSTREAM *showq)
/* DESCRIPTION
/* This function converts showq(8) daemon output to JSON format.
/* DIAGNOSTICS
/* Fatal errors: out of memory, malformed showq(8) daemon output.
/* LICENSE
/* .ad
/* .fi
/* The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/* Wietse Venema
/* IBM T.J. Watson Research
/* P.O. Box 704
/* Yorktown Heights, NY 10598, USA
/*
/* Wietse Venema
/* Google, Inc.
/* 111 8th Avenue
/* New York, NY 10011, USA
/*--*/
/* System library. */
#include <sys_defs.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sysexits.h>
#include <ctype.h>
#include <errno.h>
/* Utility library. */
#include <vstring.h>
#include <vstream.h>
#include <stringops.h>
#include <mymalloc.h>
#include <msg.h>
/* Global library. */
#include <mail_proto.h>
#include <mail_queue.h>
#include <mail_date.h>
#include <mail_params.h>
/* Application-specific. */
#include <postqueue.h>
#define STR(x) vstring_str(x)
#define LEN(x) VSTRING_LEN(x)
/* json_quote - quote JSON string */
static char *json_quote(VSTRING *result, const char *text)
{
unsigned char *cp;
int ch;
/*
* We use short escape sequences for common control characters. Note that
* RFC 4627 allows "/" (0x2F) to be sent without quoting. Differences
* with RFC 4627: we send DEL (0x7f) as \u007F; the result remains RFC
* 4627 complaint.
*/
VSTRING_RESET(result);
for (cp = (unsigned char *) text; (ch = *cp) != 0; cp++) {
if (UNEXPECTED(ISCNTRL(ch))) {
switch (ch) {
case '\b':
VSTRING_ADDCH(result, '\\');
VSTRING_ADDCH(result, 'b');
break;
case '\f':
VSTRING_ADDCH(result, '\\');
VSTRING_ADDCH(result, 'f');
break;
case '\n':
VSTRING_ADDCH(result, '\\');
VSTRING_ADDCH(result, 'n');
break;
case '\r':
VSTRING_ADDCH(result, '\\');
VSTRING_ADDCH(result, 'r');
break;
case '\t':
VSTRING_ADDCH(result, '\\');
VSTRING_ADDCH(result, 't');
break;
default:
vstring_sprintf(result, "\\u%04X", ch);
break;
}
} else {
switch (ch) {
case '\\':
case '"':
VSTRING_ADDCH(result, '\\');
/* FALLTHROUGH */
default:
VSTRING_ADDCH(result, ch);
break;
}
}
}
VSTRING_TERMINATE(result);
/*
* Force the result to be UTF-8 (with SMTPUTF8 enabled) or ASCII (with
* SMTPUTF8 disabled).
*/
printable(STR(result), '?');
return (STR(result));
}
/* json_message - report status for one message */
static void format_json(VSTREAM *showq_stream)
{
static VSTRING *queue_name = 0;
static VSTRING *queue_id = 0;
static VSTRING *addr = 0;
static VSTRING *why = 0;
static VSTRING *quote_buf = 0;
long arrival_time;
long message_size;
int showq_status;
int rcpt_count = 0;
int forced_expire;
/*
* One-time initialization.
*/
if (queue_name == 0) {
queue_name = vstring_alloc(100);
queue_id = vstring_alloc(100);
addr = vstring_alloc(100);
why = vstring_alloc(100);
quote_buf = vstring_alloc(100);
}
/*
* Read the message properties and sender address.
*/
if (attr_scan(showq_stream, ATTR_FLAG_MORE | ATTR_FLAG_STRICT
| ATTR_FLAG_PRINTABLE,
RECV_ATTR_STR(MAIL_ATTR_QUEUE, queue_name),
RECV_ATTR_STR(MAIL_ATTR_QUEUEID, queue_id),
RECV_ATTR_LONG(MAIL_ATTR_TIME, &arrival_time),
RECV_ATTR_LONG(MAIL_ATTR_SIZE, &message_size),
RECV_ATTR_INT(MAIL_ATTR_FORCED_EXPIRE, &forced_expire),
RECV_ATTR_STR(MAIL_ATTR_SENDER, addr),
ATTR_TYPE_END) != 6)
msg_fatal_status(EX_SOFTWARE, "malformed showq server response");
vstream_printf("{");
vstream_printf("\"queue_name\": \"%s\", ",
json_quote(quote_buf, STR(queue_name)));
vstream_printf("\"queue_id\": \"%s\", ",
json_quote(quote_buf, STR(queue_id)));
vstream_printf("\"arrival_time\": %ld, ", arrival_time);
vstream_printf("\"message_size\": %ld, ", message_size);
vstream_printf("\"forced_expire\": %s, ", forced_expire ? "true" : "false");
vstream_printf("\"sender\": \"%s\", ",
json_quote(quote_buf, STR(addr)));
/*
* Read zero or more (recipient, reason) pair(s) until attr_scan_more()
* consumes a terminator. If the showq daemon messes up, don't try to
* resynchronize.
*/
vstream_printf("\"recipients\": [");
for (rcpt_count = 0; (showq_status = attr_scan_more(showq_stream)) > 0; rcpt_count++) {
if (rcpt_count > 0)
vstream_printf(", ");
vstream_printf("{");
if (attr_scan(showq_stream, ATTR_FLAG_MORE | ATTR_FLAG_STRICT
| ATTR_FLAG_PRINTABLE,
RECV_ATTR_STR(MAIL_ATTR_RECIP, addr),
RECV_ATTR_STR(MAIL_ATTR_WHY, why),
ATTR_TYPE_END) != 2)
msg_fatal_status(EX_SOFTWARE, "malformed showq server response");
vstream_printf("\"address\": \"%s\"",
json_quote(quote_buf, STR(addr)));
if (LEN(why) > 0)
vstream_printf(", \"delay_reason\": \"%s\"",
json_quote(quote_buf, STR(why)));
vstream_printf("}");
}
vstream_printf("]");
if (showq_status < 0)
msg_fatal_status(EX_SOFTWARE, "malformed showq server response");
vstream_printf("}\n");
if (vstream_fflush(VSTREAM_OUT) && errno != EPIPE)
msg_fatal_status(EX_IOERR, "output write error: %m");
}
/* showq_json - streaming JSON-format output adapter */
void showq_json(VSTREAM *showq_stream)
{
int showq_status;
/*
* Emit zero or more queue file objects until attr_scan_more() consumes a
* terminator.
*/
while ((showq_status = attr_scan_more(showq_stream)) > 0
&& vstream_ferror(VSTREAM_OUT) == 0) {
format_json(showq_stream);
}
if (showq_status < 0)
msg_fatal_status(EX_SOFTWARE, "malformed showq server response");
}
|
