2 * addrsbr.c -- parse addresses 822-style
4 * This code is Copyright (c) 2002, by the authors of nmh. See the
5 * COPYRIGHT file in the root directory of the nmh distribution for
6 * complete copyright information.
10 #include <h/addrsbr.h>
14 * High level parsing of addresses:
16 * The routines in sbr/mf.c parse the syntactic representations of
17 * addresses. The routines in sbr/addrsbr.c associate semantics with those
20 * If #ifdef DUMB is in effect, a full 822-style parser is called
21 * for syntax recongition. This breaks each address into its components.
22 * Note however that no semantics are assumed about the parts or their
23 * totality. This means that implicit hostnames aren't made explicit,
24 * and explicit hostnames aren't expanded to their "official" represenations.
26 * If DUMB is not in effect, then this module does some
27 * high-level thinking about what the addresses are.
29 * 1. for MMDF systems:
31 * string%<uucp>@<local> -> string
33 * 2. for non-MMDF systems:
35 * string@host.<uucp> -> host!string
37 * 3. for any system, an address interpreted relative to the local host:
39 * string@<uucp> -> string
41 * For cases (1) and (3) above, the leftmost host is extracted. If it's not
42 * present, the local host is used. If the tests above fail, the address is
43 * considered to be a real 822-style address.
45 * If an explicit host is not present, then MH checks for a bang to indicate
46 * an explicit UUCP-style address. If so, this is noted. If not, the host is
47 * defaulted, typically to the local host. The lack of an explict host is
50 * If an explicit 822-style host is present, then MH checks to see if it
51 * can expand this to the official name for the host. If the hostname is
52 * unknown, the address is so typed.
54 * To summarize, when we're all done, here's what MH knows about the address:
56 * DUMB - type: local, uucp, or network
57 * host: not locally defaulted, not explicitly expanded
60 * other - type: local, uucp, network, unknown
66 static char *pers = NULL;
67 static char *mbox = NULL;
68 static char *host = NULL;
69 static char *route = NULL;
70 static char *grp = NULL;
71 static char *note = NULL;
72 static char err[BUFSIZ];
73 static char adr[BUFSIZ];
76 extern boolean username_extension_masquerading; /* defined in mts.c */
82 char *getusername (void);
90 pers = mbox = host = route = grp = note = NULL;
93 if ((ap = getadrx (addrs ? addrs : "")) == NULL)
96 strncpy (adr, ap->text, sizeof(adr));
104 if (ap->err && *ap->err)
105 strncpy (err, ap->err, sizeof(err));
112 getm (char *str, char *dfhost, int dftype, int wanthost, char *eresult)
118 #endif /* not DUMB */
122 strcpy (eresult, err);
124 if (wanthost == AD_HOST)
125 admonish (NULL, "bad address '%s' - %s", str, err);
128 if (pers == NULL && mbox == NULL && host == NULL && route == NULL
131 strcpy (eresult, "null address");
133 if (wanthost == AD_HOST)
134 admonish (NULL, "null address '%s'", str);
137 if (mbox == NULL && grp == NULL) {
139 strcpy (eresult, "no mailbox in address");
140 else if (wanthost == AD_HOST)
141 admonish (NULL, "no mailbox in address '%s'", str);
145 if (dfhost == NULL) {
146 dfhost = LocalName ();
150 mp = (struct mailname *) calloc ((size_t) 1, sizeof(*mp));
153 strcpy (eresult, "insufficient memory to represent address");
154 else if (wanthost == AD_HOST)
155 adios (NULL, "insufficient memory to represent address");
160 mp->m_text = getcpy (str);
162 mp->m_pers = getcpy (pers);
165 mp->m_type = BADHOST;
168 mp->m_gname = getcpy (grp);
170 mp->m_note = getcpy (note);
175 mp->m_mbox = getcpy (mbox);
176 mp->m_host = getcpy (host);
178 if ((pp = strchr(mbox, '!'))) {
180 mp->m_mbox = getcpy (pp);
181 mp->m_host = getcpy (mbox);
182 mp->m_type = UUCPHOST;
185 mp->m_mbox = getcpy (mbox);
187 if (route == NULL && dftype == LOCALHOST) {
193 mp->m_host = route ? NULL : getcpy (dfhost);
194 mp->m_type = route ? NETHOST : dftype;
200 if (wanthost == AD_NHST)
201 mp->m_type = !mh_strcasecmp (LocalName (), mp->m_host)
202 ? LOCALHOST : NETHOST;
205 mp->m_type = mh_strcasecmp (LocalName(), mp->m_host) ? NETHOST : LOCALHOST;
208 if (pp = OfficialName (mp->m_host)) {
211 mp->m_host = getcpy (pp);
212 mp->m_type = mh_strcasecmp (LocalName(), mp->m_host) ? NETHOST : LOCALHOST;
214 if (dp = strchr(mp->m_host, '.')) {
216 if (pp = OfficialName (mp->m_host))
220 mp->m_type = BADHOST;
222 #endif /* not DUMB */
226 mp->m_path = getcpy (route);
229 mp->m_gname = getcpy (grp);
231 mp->m_note = getcpy (note);
238 mnfree (struct mailname *mp)
262 #define empty(s) ((s) ? (s) : "")
265 auxformat (struct mailname *mp, int extras)
267 static char addr[BUFSIZ];
268 static char buffer[BUFSIZ];
272 strncpy (addr, mp->m_mbox ? mp->m_mbox : "", sizeof(addr));
277 if (mp->m_type != UUCPHOST)
278 snprintf (addr, sizeof(addr), mp->m_host ? "%s%s@%s" : "%s%s",
279 empty(mp->m_path), empty(mp->m_mbox), mp->m_host);
281 #endif /* not BANG */
282 snprintf (addr, sizeof(addr), "%s!%s", mp->m_host, mp->m_mbox);
287 if (mp->m_pers || mp->m_path) {
289 snprintf (buffer, sizeof(buffer), "%s %s <%s>",
290 legal_person (mp->m_pers ? mp->m_pers : mp->m_mbox),
293 snprintf (buffer, sizeof(buffer), "%s <%s>",
294 legal_person (mp->m_pers ? mp->m_pers : mp->m_mbox),
296 } else if (mp->m_note)
297 snprintf (buffer, sizeof(buffer), "%s %s", addr, mp->m_note);
299 strncpy (buffer, addr, sizeof(buffer));
306 * address specific "sprintf"
310 adrsprintf (char *username, char *domain)
313 static char addr[BUFSIZ];
315 if (username == NULL)
316 username = getusername();
318 if (username_extension_masquerading) {
319 /* mts.conf contains "masquerade:[...]username_extension[...]",
320 * so tack on the value of the $USERNAME_EXTENSION environment
321 * variable, if set, to username.
323 char* extension = getenv("USERNAME_EXTENSION");
324 static char username_with_extension[BUFSIZ];
326 if (extension != NULL && *extension != '\0') {
327 snprintf_return = snprintf(username_with_extension,
328 sizeof(username_with_extension),
329 "%s%s", username, extension);
331 if (snprintf_return < 0 ||
332 snprintf_return >= sizeof(username_with_extension))
333 adios(NULL, "snprintf() error writing username (%d chars) and"
334 " $USERNAME_EXTENSION (%d chars) to array of BUFSIZ (%d)"
336 strlen(username), strlen(extension), BUFSIZ);
338 username = username_with_extension;
347 domain = LocalName();
350 snprintf_return = snprintf (addr, sizeof(addr), "%s@%s", username, domain);
352 snprintf_return = snprintf (addr, sizeof(addr), "%s!%s", domain, username);
355 if (snprintf_return < 0 || snprintf_return >= sizeof(addr))
356 adios(NULL, "snprintf() error writing username (%d chars), domain (%d"
357 " chars), and 1 separator char to array of BUFSIZ (%d) chars",
358 strlen(username), strlen(domain), BUFSIZ);
365 #define W_MBEG 0x0001
366 #define W_MEND 0x0002
367 #define W_MBOX (W_MBEG | W_MEND)
368 #define W_HBEG 0x0004
369 #define W_HEND 0x0008
370 #define W_HOST (W_HBEG | W_HEND)
371 #define WBITS "\020\01MBEG\02MEND\03HBEG\04HEND"
374 * Check if this is my address
378 ismymbox (struct mailname *np)
386 static char *am = NULL;
387 static struct mailname mq={NULL};
390 * If this is the first call, initialize
391 * list of alternate mailboxes.
395 mq.m_mbox = getusername ();
396 if ((am = context_find ("alternate-mailboxes")) == NULL)
401 while ((cp = getname (am))) {
402 if ((mp->m_next = getm (cp, NULL, 0, AD_NAME, NULL)) == NULL) {
403 admonish (NULL, "illegal address: %s", cp);
408 if (*mp->m_mbox == '*') {
409 mp->m_type |= W_MBEG;
412 if (*(cp = mp->m_mbox + strlen (mp->m_mbox) - 1) == '*') {
413 mp->m_type |= W_MEND;
417 if (*mp->m_host == '*') {
418 mp->m_type |= W_HBEG;
421 if (*(cp = mp->m_host + strlen (mp->m_host) - 1) == '*') {
422 mp->m_type |= W_HEND;
426 if ((cp = getenv ("MHWDEBUG")) && *cp)
427 fprintf (stderr, "mbox=\"%s\" host=\"%s\" %s\n",
428 mp->m_mbox, mp->m_host,
429 snprintb (buffer, sizeof(buffer), (unsigned) mp->m_type, WBITS));
433 advise (NULL, "please fix the %s: entry in your %s file",
434 "alternate-mailboxes", mh_profile);
438 if (np == NULL) /* XXX */
441 switch (np->m_type) {
443 len = strlen (cp = LocalName ());
444 if (!uprf (np->m_host, cp) || np->m_host[len] != '.')
449 if (mh_strcasecmp (np->m_host, SystemName()))
453 if (!mh_strcasecmp (np->m_mbox, mq.m_mbox))
462 * Now scan through list of alternate
463 * mailboxes, and check for a match.
465 for (mp = &mq; mp->m_next;) {
469 if ((len = strlen (cp = np->m_mbox))
470 < (i = strlen (pp = mp->m_mbox)))
472 switch (mp->m_type & W_MBOX) {
474 if (mh_strcasecmp (cp, pp))
478 if (mh_strcasecmp (cp + len - i, pp))
485 case W_MBEG | W_MEND:
486 if (stringdex (pp, cp) < 0)
493 if (np->m_host == NULL)
495 if ((len = strlen (cp = np->m_host))
496 < (i = strlen (pp = mp->m_host)))
498 switch (mp->m_type & W_HOST) {
500 if (mh_strcasecmp (cp, pp))
504 if (mh_strcasecmp (cp + len - i, pp))
511 case W_HBEG | W_HEND:
512 if (stringdex (pp, cp) < 0)
524 * Moved from hosts.c -- find out the official name of a host
528 * In the SendMail world, we really don't know what the valid
529 * hosts are. We could poke around in the sendmail.cf file, but
530 * that still isn't a guarantee. As a result, we'll say that
531 * everything is a valid host, and let SendMail worry about it.
539 OfficialName (char *name)
542 char *q, site[BUFSIZ];
543 struct addrinfo hints, *res;
545 static char buffer[BUFSIZ];
547 for (p = name, q = site; *p && (q - site < sizeof(site) - 1); p++, q++)
548 *q = isupper (*p) ? tolower (*p) : *p;
552 if (!mh_strcasecmp (LocalName(), site))
555 memset(&hints, 0, sizeof(hints));
556 hints.ai_flags = AI_CANONNAME;
557 hints.ai_family = PF_UNSPEC;
559 if (getaddrinfo(q, NULL, &hints, &res) == 0) {
560 strncpy (buffer, res->ai_canonname, sizeof(buffer));
561 buffer[sizeof(buffer) - 1] = '\0';
566 strncpy (buffer, site, sizeof(buffer));