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
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
|
/*++
/* NAME
/* attr_print0 3
/* SUMMARY
/* send attributes over byte stream
/* SYNOPSIS
/* #include <attr.h>
/*
/* int attr_print0(fp, flags, type, name, ..., ATTR_TYPE_END)
/* VSTREAM fp;
/* int flags;
/* int type;
/* char *name;
/*
/* int attr_vprint0(fp, flags, ap)
/* VSTREAM fp;
/* int flags;
/* va_list ap;
/* DESCRIPTION
/* attr_print0() takes zero or more (name, value) simple attributes
/* and converts its input to a byte stream that can be recovered with
/* attr_scan0(). The stream is not flushed.
/*
/* attr_vprint0() provides an alternate interface that is convenient
/* for calling from within variadic functions.
/*
/* Attributes are sent in the requested order as specified with the
/* attr_print0() argument list. This routine satisfies the formatting
/* rules as outlined in attr_scan0(3).
/*
/* Arguments:
/* .IP fp
/* Stream to write the result to.
/* .IP flags
/* The bit-wise OR of zero or more of the following.
/* .RS
/* .IP ATTR_FLAG_MORE
/* After sending the requested attributes, leave the output stream in
/* a state that is usable for more attribute sending operations on
/* the same output attribute list.
/* By default, attr_print0() automatically appends an attribute list
/* terminator when it has sent the last requested attribute.
/* .RE
/* .IP List of attributes followed by terminator:
/* .RS
/* .IP "SEND_ATTR_INT(const char *name, int value)"
/* The arguments are an attribute name and an integer.
/* .IP "SEND_ATTR_LONG(const char *name, long value)"
/* The arguments are an attribute name and a long integer.
/* .IP "SEND_ATTR_STR(const char *name, const char *value)"
/* The arguments are an attribute name and a null-terminated
/* string.
/* .IP "SEND_ATTR_DATA(const char *name, ssize_t len, const void *value)"
/* The arguments are an attribute name, an attribute value
/* length, and an attribute value pointer.
/* .IP "SEND_ATTR_FUNC(ATTR_PRINT_SLAVE_FN, const void *value)"
/* The arguments are a function pointer and generic data
/* pointer. The caller-specified function returns whatever the
/* specified attribute printing function returns.
/* .IP "SEND_ATTR_HASH(const HTABLE *table)"
/* .IP "SEND_ATTR_NAMEVAL(const NVTABLE *table)"
/* The content of the table is sent as a sequence of string-valued
/* attributes with names equal to the table lookup keys.
/* .IP ATTR_TYPE_END
/* This terminates the attribute list.
/* .RE
/* DIAGNOSTICS
/* The result value is 0 in case of success, VSTREAM_EOF in case
/* of trouble.
/*
/* Panic: interface violation. All system call errors are fatal.
/* SEE ALSO
/* attr_scan0(3) recover attributes from byte stream
/* 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 <stdarg.h>
#include <string.h>
/* Utility library. */
#include <msg.h>
#include <mymalloc.h>
#include <vstream.h>
#include <htable.h>
#include <attr.h>
#include <base64_code.h>
#define STR(x) vstring_str(x)
#define LEN(x) VSTRING_LEN(x)
/* attr_vprint0 - send attribute list to stream */
int attr_vprint0(VSTREAM *fp, int flags, va_list ap)
{
const char *myname = "attr_print0";
int attr_type;
char *attr_name;
unsigned int_val;
unsigned long long_val;
char *str_val;
HTABLE_INFO **ht_info_list;
HTABLE_INFO **ht;
ssize_t len_val;
static VSTRING *base64_buf;
ATTR_PRINT_SLAVE_FN print_fn;
void *print_arg;
/*
* Sanity check.
*/
if (flags & ~ATTR_FLAG_ALL)
msg_panic("%s: bad flags: 0x%x", myname, flags);
/*
* Iterate over all (type, name, value) triples, and produce output on
* the fly.
*/
while ((attr_type = va_arg(ap, int)) != ATTR_TYPE_END) {
switch (attr_type) {
case ATTR_TYPE_INT:
attr_name = va_arg(ap, char *);
vstream_fwrite(fp, attr_name, strlen(attr_name) + 1);
int_val = va_arg(ap, int);
vstream_fprintf(fp, "%u", (unsigned) int_val);
VSTREAM_PUTC('\0', fp);
if (msg_verbose)
msg_info("send attr %s = %u", attr_name, int_val);
break;
case ATTR_TYPE_LONG:
attr_name = va_arg(ap, char *);
vstream_fwrite(fp, attr_name, strlen(attr_name) + 1);
long_val = va_arg(ap, unsigned long);
vstream_fprintf(fp, "%lu", (unsigned long) long_val);
VSTREAM_PUTC('\0', fp);
if (msg_verbose)
msg_info("send attr %s = %lu", attr_name, long_val);
break;
case ATTR_TYPE_STR:
attr_name = va_arg(ap, char *);
vstream_fwrite(fp, attr_name, strlen(attr_name) + 1);
str_val = va_arg(ap, char *);
vstream_fwrite(fp, str_val, strlen(str_val) + 1);
if (msg_verbose)
msg_info("send attr %s = %s", attr_name, str_val);
break;
case ATTR_TYPE_DATA:
attr_name = va_arg(ap, char *);
vstream_fwrite(fp, attr_name, strlen(attr_name) + 1);
len_val = va_arg(ap, ssize_t);
str_val = va_arg(ap, char *);
if (base64_buf == 0)
base64_buf = vstring_alloc(10);
base64_encode(base64_buf, str_val, len_val);
vstream_fwrite(fp, STR(base64_buf), LEN(base64_buf) + 1);
if (msg_verbose)
msg_info("send attr %s = [data %ld bytes]",
attr_name, (long) len_val);
break;
case ATTR_TYPE_FUNC:
print_fn = va_arg(ap, ATTR_PRINT_SLAVE_FN);
print_arg = va_arg(ap, void *);
print_fn(attr_print0, fp, flags | ATTR_FLAG_MORE, print_arg);
break;
case ATTR_TYPE_HASH:
vstream_fwrite(fp, ATTR_NAME_OPEN, sizeof(ATTR_NAME_OPEN));
ht_info_list = htable_list(va_arg(ap, HTABLE *));
for (ht = ht_info_list; *ht; ht++) {
vstream_fwrite(fp, ht[0]->key, strlen(ht[0]->key) + 1);
vstream_fwrite(fp, ht[0]->value, strlen(ht[0]->value) + 1);
if (msg_verbose)
msg_info("send attr name %s value %s",
ht[0]->key, (char *) ht[0]->value);
}
myfree((void *) ht_info_list);
vstream_fwrite(fp, ATTR_NAME_CLOSE, sizeof(ATTR_NAME_CLOSE));
break;
default:
msg_panic("%s: unknown type code: %d", myname, attr_type);
}
}
if ((flags & ATTR_FLAG_MORE) == 0)
VSTREAM_PUTC('\0', fp);
return (vstream_ferror(fp));
}
int attr_print0(VSTREAM *fp, int flags,...)
{
va_list ap;
int ret;
va_start(ap, flags);
ret = attr_vprint0(fp, flags, ap);
va_end(ap);
return (ret);
}
#ifdef TEST
/*
* Proof of concept test program. Mirror image of the attr_scan0 test
* program.
*/
#include <msg_vstream.h>
int main(int unused_argc, char **argv)
{
HTABLE *table = htable_create(1);
msg_vstream_init(argv[0], VSTREAM_ERR);
msg_verbose = 1;
htable_enter(table, "foo-name", mystrdup("foo-value"));
htable_enter(table, "bar-name", mystrdup("bar-value"));
attr_print0(VSTREAM_OUT, ATTR_FLAG_NONE,
SEND_ATTR_INT(ATTR_NAME_INT, 4711),
SEND_ATTR_LONG(ATTR_NAME_LONG, 1234L),
SEND_ATTR_STR(ATTR_NAME_STR, "whoopee"),
SEND_ATTR_DATA(ATTR_NAME_DATA, strlen("whoopee"), "whoopee"),
SEND_ATTR_HASH(table),
SEND_ATTR_LONG(ATTR_NAME_LONG, 4321L),
ATTR_TYPE_END);
attr_print0(VSTREAM_OUT, ATTR_FLAG_NONE,
SEND_ATTR_INT(ATTR_NAME_INT, 4711),
SEND_ATTR_LONG(ATTR_NAME_LONG, 1234L),
SEND_ATTR_STR(ATTR_NAME_STR, "whoopee"),
SEND_ATTR_DATA(ATTR_NAME_DATA, strlen("whoopee"), "whoopee"),
ATTR_TYPE_END);
if (vstream_fflush(VSTREAM_OUT) != 0)
msg_fatal("write error: %m");
htable_free(table, myfree);
return (0);
}
#endif
|
