10 #if defined(TEST) && !defined(DEBUG)
16 # include <sys/types.h>
21 #define STRALLOC_INIT { 0 }
25 * Arguments: @int cdb@ = the CDB file descriptor
26 * @int prefix@ = the prefix character (e.g., @'V'@)
27 * @const char *key, int len@ = the key string and its length
28 * @const char *suffix@ = a suffix to append to the key
29 * @const char **kp@ = where to put the full key string
30 * @uint32 *dlen@ = where to put the answer's length
32 * Returns: Zero if the lookup failed, @+1@ on success, or @-1@ for an
35 * Use: Probes a CDB file. The key looked up is the character
36 * @prefix@ followed by the first @len@ bytes of @key@, followed
37 * by @suffix@ (if non-null).
40 static int probe(int cdb
, int prefix
, const char *key
, int len
,
41 const char *suffix
, const char **kp
, uint32
*dlen
)
43 static stralloc k
= STRALLOC_INIT
;
48 if (!stralloc_append(&k
, &ch
) ||
49 !stralloc_catb(&k
, key
, len
) ||
50 (suffix
&& !stralloc_cats(&k
, suffix
)) ||
54 D( fprintf(stderr
, "*** `%.*s' -> ", k
.len
, k
.s
); )
55 rc
= cdb_seek(cdb
, k
.s
, k
.len
- 1, dlen
);
57 fprintf(stderr
, "error: %s\n", strerror(errno
));
59 fprintf(stderr
, "not found\n");
61 fprintf(stderr
, "empty\n");
66 off_t pos
= lseek(cdb
, 0, SEEK_CUR
);
69 nn
= sizeof(buf
); if (nn
> n
) nn
= n
;
71 fwrite(buf
, 1, nn
, stderr
);
74 fprintf(stderr
, "'\n");
75 lseek(cdb
, pos
, SEEK_SET
);
80 /* --- @localprobe@ --- *
82 * Arguments: @int cdb@ = the CDB file descriptor
83 * @const char *sender@ = the envelope-sender address
84 * @const char *key, int len@ = the (possibly defaulted) mailbox
86 * @const char *suffix@ = a suffix to append to the key (e.g.,
88 * @const char *tail@ = the tail of the local address matching
89 * any defaulted extension part
90 * @int *rc@ = where to put the answer
92 * Returns: Positive if found, zero if not found, negative on error.
94 * Use: Looks up a local-part in the database. This may involve
95 * invoking a Userv service for the recipient's owner.
98 static int localprobe(int cdb
, const char *sender
,
99 const char *key
, int len
,
100 const char *suffix
, const char *tail
, int *rc
)
106 static stralloc u
= STRALLOC_INIT
;
107 static stralloc serv
= STRALLOC_INIT
;
113 if ((err
= probe(cdb
, 'L', key
, len
, suffix
, &k
, &dlen
)) < 0)
115 if (!err
) { *rc
= 0; return (0); }
116 if (!dlen
) { errno
= EINVAL
; return (-1); }
117 if (read(cdb
, &ch
, 1) != 1) { errno
= EIO
; return (-1); }
120 if (!stralloc_ready(&u
, dlen
- 1)) return (-1);
121 if (read(cdb
, u
.s
, dlen
- 1) != dlen
- 1) { errno
= EIO
; return (-1); }
124 if (!stralloc_cats(&serv
, "addrcheck:") ||
125 !stralloc_cats(&serv
, k
+ 1) ||
126 !stralloc_0(&serv
) ||
129 D( fprintf(stderr
, "asking user:\n\
130 user = %s; service = %s\n tail = %s; sender = %s\n\
131 address = %s; key = %s\n",
132 u
.s
, serv
.s
, tail
, sender
, key
, k
+ 1); )
134 if (pipe(p
) || (kid
= fork()) == -1)
137 close(0); open("/dev/null", O_RDONLY
);
140 close(2); open("/dev/null", O_WRONLY
);
142 close(p
[0]); close(p
[1]);
143 execl("/usr/bin/userv", "/usr/bin/userv",
144 "-f", "stdin=/dev/null", "-t", "10",
146 tail
, sender
, key
, k
+ 1,
151 if (wait_pid(&wstat
, kid
) < 0) { close(p
[0]); return (-1); }
152 D( fprintf(stderr
, "userv exited with status %d\n", wstat
); )
153 if (wstat
) { close (p
[0]); errno
= EAGAIN
; return (-1); }
154 n
= read(p
[0], &ch
, 1);
155 if (n
!= 1) { close (p
[0]); errno
= EAGAIN
; return (-1); }
157 D( fprintf(stderr
, "userv answer was `%c'\n", ch
); )
158 } else if (dlen
!= 1) {
168 * Arguments: @int cdb@ = file descriptor for the CDB
169 * @const char *l@ = pointer to local-part to look up
170 * @int len@ = length of the local-part
171 * @const char *sender@ = envelope sender address
172 * @int *rc@ = where to put the answer
174 * Returns: Positive if answered, zero if lookup failed, negative on
177 * Use: Finds out whether @l@ is a valid local-part for a non-virtual
178 * mailbox name. Handles defaulting of extension addresses and
182 static int local(int cdb
, const char *l
, int len
,
183 const char *sender
, int *rc
)
189 if ((err
= localprobe(cdb
, sender
, l
, len
, 0, l
+ len
, &code
)) != 0)
193 dash
= byte_rchr(l
, len
, '-');
194 if (dash
== len
) break;
195 if ((err
= localprobe(cdb
, sender
,
196 l
, dash
, "-default", l
+ dash
+ 1, &code
)) != 0)
206 case '+': *rc
= 1; break;
207 case '-': *rc
= 0; break;
208 default: errno
= EINVAL
; err
= -1; break;
216 * Arguments: @int cdb@ = file descriptor for CDB
217 * @const char *u@ = the local-part of the recipient mailbox
218 * @int ulen@ = length of the local-part
219 * @const char *addr@ = the virtual domain to look up
220 * @int alen@ = length of the virtual domain
221 * @const char *sender@ = the envelope sender address
222 * @int *rc@ = where to put the answer
224 * Returns: Positive if found, zero if not found, negative on error.
226 * Use: Looks up the address as a virtual domain. If found, the
227 * local-part is appended to the local mailbox handling the
228 * virtual domain and passed to @local@.
231 static int virt(int cdb
, const char *u
, int ulen
,
232 const char *addr
, int alen
, const char *sender
, int *rc
)
234 static stralloc l
= STRALLOC_INIT
;
238 if ((err
= probe(cdb
, 'V', addr
, alen
, 0, 0, &dlen
)) <= 0)
240 if (!stralloc_ready(&l
, dlen
+ 1)) return (-1);
241 if (read(cdb
, l
.s
, dlen
) != dlen
) { errno
= EIO
; return (-1); }
244 if (!stralloc_catb(&l
, u
, ulen
) || !stralloc_0(&l
)) return (-1);
245 D( printf("*** virtual map -> `%s'\n", l
.s
); )
246 if (local(cdb
, l
.s
, l
.len
- 1, sender
, rc
) < 0) return (-1);
250 /* --- @addrcheck@ --- *
252 * Arguments: @int cdb@ = file descriptor for CDB to look things up in
253 * @const char *addr@ = the (full) recipient mailbox to look up
254 * @const char *sender@ = the (full) envelope sender address
255 * @int *rc@ = where to put the answer.
257 * Returns: Nonnegative on success, or @-1@ on failure.
259 * Use: Determines whether @addr@ is a valid mailbox on this system,
260 * by examining the given CDB file. On exit, @*rc@ is set to
261 * @'+'@ if the mailbox is valid, or @'-'@ if not.
264 int addrcheck(int cdb
, const char *addr
, const char *sender
, int *rc
)
269 static stralloc l
= STRALLOC_INIT
;
272 at
= str_rchr(addr
, '@');
274 return (local(cdb
, addr
, len
, sender
, rc
));
276 if ((err
= virt(cdb
, addr
, at
, addr
, len
, sender
, rc
)) != 0)
280 if ((err
= virt(cdb
, addr
, at
, addr
+ dot
, len
- dot
, sender
, rc
)) != 0)
282 dot
+= byte_chr(addr
+ dot
+ 1, len
- dot
- 1, '.') + 1;
285 if ((err
= probe(cdb
, '@', addr
+ at
+ 1, len
- at
- 1, 0, 0, &dlen
)) < 0)
287 if (!err
) { *rc
= 1; return (0); }
288 if (dlen
!= 0) { errno
= EINVAL
; return (-1); }
290 if (!stralloc_catb(&l
, addr
, at
) ||
293 return (local(cdb
, l
.s
, l
.len
- 1, sender
, rc
));
298 #include <sys/types.h>
305 int main(int argc
, char *argv
[])
312 fprintf(stderr
, "usage: addrcheck CDB SENDER ADDR...\n");
315 if ((fd
= open(argv
[1], O_RDONLY
)) < 0) {
319 for (i
= 3; i
< argc
; i
++) {
320 if (addrcheck(fd
, argv
[i
], argv
[2], &rc
) < 0) {
324 printf("%s: %s\n", argv
[i
], rc ?
"ok" : "bad");