2 * For license terms, see the file COPYING in this directory.
5 /* We need this for HAVE_STDARG_H, etc */
8 /* We need this for size_t */
11 /* constants designating the various supported protocols */
22 #define SMTP_PORT "smtp"
23 #define KPOP_PORT "kpop"
24 #else /* INET6_ENABLE */
26 #define KPOP_PORT 1109
27 #endif /* INET6_ENABLE */
30 #define SIMAP_PORT 993
31 #define SPOP3_PORT 995
35 * We need to distinguish between mailbox and mailbag protocols.
36 * Under a mailbox protocol wwe're pulling mail for a speecific user.
37 * Under a mailbag protocol we're fetching mail for an entire domain.
39 #define MAILBOX_PROTOCOL(ctl) ((ctl)->server.protocol < P_ETRN)
41 /* authentication types */
42 #define A_ANY 0 /* use the first method that works */
43 #define A_PASSWORD 1 /* password authentication */
44 #define A_NTLM 2 /* Microsoft NTLM protocol */
45 #define A_CRAM_MD5 3 /* CRAM-MD5 shrouding (RFC2195) */
46 #define A_OTP 4 /* One-time password (RFC1508) */
47 #define A_KERBEROS_V4 5 /* authenticate w/ Kerberos V4 */
48 #define A_KERBEROS_V5 6 /* authenticate w/ Kerberos V5 */
49 #define A_GSSAPI 7 /* authenticate with GSSAPI */
50 #define A_SSH 8 /* authentication at session level */
52 /* some protocols (KERBEROS, GSSAPI, SSH) don't require a password */
53 #define NO_PASSWORD(ctl) ((ctl)->server.authenticate > A_OTP || (ctl)->server.protocol == P_ETRN)
56 * Definitions for buffer sizes. We get little help on setting maxima
57 * from IMAP RFCs up to 2060, so these are mostly from POP3.
59 #define HOSTLEN 635 /* max hostname length (RFC1123) */
60 #define POPBUFSIZE 512 /* max length of response (RFC1939) */
61 #define IDLEN 128 /* max length of UID (RFC1939) */
63 /* per RFC1939 this should be 40, but Microsoft Exchange ignores that limit */
64 #define USERNAMELEN 128 /* max POP3 arg length */
66 /* clear a netBSD kernel parameter out of the way */
70 * The RFC822 limit on message line size is just 998. But
71 * make this *way* oversized; idiot DOS-world mailers that
72 * don't line-wrap properly often ship entire paragraphs as
75 #define MSGBUFSIZE 8192
77 #define NAMELEN 64 /* max username length */
78 #define PASSWORDLEN 64 /* max password length */
79 #define DIGESTLEN 33 /* length of MD5 digest */
81 /* exit code values */
82 #define PS_SUCCESS 0 /* successful receipt of messages */
83 #define PS_NOMAIL 1 /* no mail available */
84 #define PS_SOCKET 2 /* socket I/O woes */
85 #define PS_AUTHFAIL 3 /* user authorization failed */
86 #define PS_PROTOCOL 4 /* protocol violation */
87 #define PS_SYNTAX 5 /* command-line syntax error */
88 #define PS_IOERR 6 /* bad permissions on rc file */
89 #define PS_ERROR 7 /* protocol error */
90 #define PS_EXCLUDE 8 /* client-side exclusion error */
91 #define PS_LOCKBUSY 9 /* server responded lock busy */
92 #define PS_SMTP 10 /* SMTP error */
93 #define PS_DNS 11 /* fatal DNS error */
94 #define PS_BSMTP 12 /* output batch could not be opened */
95 #define PS_MAXFETCH 13 /* poll ended by fetch limit */
96 #define PS_SERVBUSY 14 /* server is busy */
97 /* leave space for more codes */
98 #define PS_UNDEFINED 23 /* something I hadn't thought of */
99 #define PS_TRANSIENT 24 /* transient failure (internal use) */
100 #define PS_REFUSED 25 /* mail refused (internal use) */
101 #define PS_RETAINED 26 /* message retained (internal use) */
102 #define PS_TRUNCATED 27 /* headers incomplete (internal use) */
104 /* output noise level */
105 #define O_SILENT 0 /* mute, max squelch, etc. */
106 #define O_NORMAL 1 /* user-friendly */
107 #define O_VERBOSE 2 /* chatty */
108 #define O_DEBUG 3 /* prolix */
109 #define O_MONITOR O_VERBOSE
111 #define SIZETICKER 1024 /* print 1 dot per this many bytes */
114 * We #ifdef this and use flag rather than bool
115 * to avoid a type clash with curses.h
123 /* we need to use zero as a flag-uninitialized value */
149 flag mark; /* UID-index information */
150 #define UID_UNSEEN 0 /* hasn't been seen */
151 #define UID_SEEN 1 /* seen, but not deleted */
152 #define UID_DELETED 2 /* this message has been deleted */
153 #define UID_EXPUNGED 3 /* this message has been expunged */
163 struct method /* describe methods for protocol state machine */
165 const char *name; /* protocol name */
168 const char *sslservice;
169 #else /* INET6_ENABLE */
170 int port; /* service port */
171 int sslport; /* service port for ssl */
172 #endif /* INET6_ENABLE */
173 flag tagged; /* if true, generate & expect command tags */
174 flag delimited; /* if true, accept "." message delimiter */
175 int (*parse_response)(int, char *);
176 /* response_parsing function */
177 int (*getauth)(int, struct query *, char *);
178 /* authorization fetcher */
179 int (*getrange)(int, struct query *, const char *, int *, int *, int *);
180 /* get message range to fetch */
181 int (*getsizes)(int, int, int *);
182 /* get sizes of messages */
183 int (*is_old)(int, struct query *, int);
184 /* check for old message */
185 int (*fetch_headers)(int, struct query *, int, int *);
186 /* fetch FROM headera given message */
187 int (*fetch_body)(int, struct query *, int, int *);
188 /* fetch a given message */
189 int (*trail)(int, struct query *, int);
190 /* eat trailer of a message */
191 int (*delete)(int, struct query *, int);
193 int (*logout_cmd)(int, struct query *);
195 flag retry; /* can getrange poll for new messages? */
198 struct hostdata /* shared among all user connections to given server */
201 char *pollname; /* poll label of host */
202 char *via; /* "true" server name if non-NULL */
203 struct idlist *akalist; /* server name first, then akas */
204 struct idlist *localdomains; /* list of pass-through domains */
205 int protocol; /* protocol type */
207 char *service; /* IPv6 service name */
208 void *netsec; /* IPv6 security request */
209 #else /* INET6_ENABLE */
210 int port; /* TCP/IP service port number */
211 #endif /* INET6_ENABLE */
212 int interval; /* # cycles to skip between polls */
213 int authenticate; /* authentication mode to try */
214 int timeout; /* inactivity timout in seconds */
215 char *envelope; /* envelope address list header */
216 int envskip; /* skip to numbered envelope header */
217 char *qvirtual; /* prefix removed from local user id */
218 flag skip; /* suppress poll in implicit mode? */
219 flag dns; /* do DNS lookup on multidrop? */
220 flag uidl; /* use RFC1725 UIDLs? */
222 flag sdps; /* use Demon Internet SDPS *ENV */
223 #endif /* SDPS_ENABLE */
224 flag checkalias; /* resolve aliases by comparing IPs? */
225 char *principal; /* Kerberos principal for mail service */
226 char *esmtp_name, *esmtp_password; /* ESMTP AUTH information */
228 #if defined(linux) || defined(__FreeBSD__)
232 struct interface_pair_s *interface_pair;
235 char *plugin,*plugout;
237 /* computed for internal use */
238 const struct method *base_protocol; /* relevant protocol method table */
239 int poll_count; /* count of polls so far */
240 char *queryname; /* name to attempt DNS lookup on */
241 char *truename; /* "true name" of server host */
242 char *trueaddr; /* IP address of truename, as char */
243 struct hostdata *lead_server; /* ptr to lead query for this server */
249 /* mailserver connection controls */
250 struct hostdata server;
253 struct idlist *localnames; /* including calling user's name */
254 int wildcard; /* should unmatched names be passed through */
255 char *remotename; /* remote login name to use */
256 char *password; /* remote password to use */
257 struct idlist *mailboxes; /* list of mailboxes to check */
259 /* per-forwarding-target data */
260 struct idlist *smtphunt; /* list of SMTP hosts to try forwarding to */
261 struct idlist *domainlist; /* domainlist to fetch from */
262 char *smtpaddress; /* address to force in RCPT TO */
263 char *smtpname; /* full RCPT TO name, including domain */
264 struct idlist *antispam; /* list of listener's antispam response */
265 char *mda; /* local MDA to pass mail to */
266 char *bsmtp; /* BSMTP output file */
267 char listener; /* what's the listener's wire protocol? */
268 #define SMTP_MODE 'S'
269 #define LMTP_MODE 'L'
270 char *preconnect; /* pre-connection command to execute */
271 char *postconnect; /* post-connection command to execute */
273 /* per-user control flags */
274 flag keep; /* if TRUE, leave messages undeleted */
275 flag fetchall; /* if TRUE, fetch all (not just unseen) */
276 flag flush; /* if TRUE, delete messages already seen */
277 flag rewrite; /* if TRUE, canonicalize recipient addresses */
278 flag stripcr; /* if TRUE, strip CRs in text */
279 flag forcecr; /* if TRUE, force CRs before LFs in text */
280 flag pass8bits; /* if TRUE, ignore Content-Transfer-Encoding */
281 flag dropstatus; /* if TRUE, drop Status lines in mail */
282 flag dropdelivered; /* if TRUE, drop Delivered-To lines in mail */
283 flag mimedecode; /* if TRUE, decode MIME-armored messages */
284 flag idle; /* if TRUE, idle after each poll */
285 int limit; /* limit size of retrieved messages */
286 int warnings; /* size warning interval */
287 int fetchlimit; /* max # msgs to get in single poll */
288 int batchlimit; /* max # msgs to pass in single SMTP session */
289 int expunge; /* max # msgs to pass between expunges */
290 flag use_ssl; /* use SSL encrypted session */
291 char *sslkey; /* optional SSL private key file */
292 char *sslcert; /* optional SSL certificate file */
293 char *sslproto; /* force usage of protocol (ssl2|ssl3|tls1) - defaults to ssl23 */
294 char *sslcertpath; /* Trusted certificate directory for checking the server cert */
295 flag sslcertck; /* Strictly check the server cert. */
296 char *sslfingerprint; /* Fingerprint to check against */
297 char *properties; /* passthrough properties for extensions */
298 flag tracepolls; /* if TRUE, add poll trace info to Received */
300 /* internal use -- per-poll state */
301 flag active; /* should we actually poll this server? */
302 const char *destaddr; /* destination host for this query */
303 int errcount; /* count transient errors in last pass */
304 int authfailcount; /* count of authorization failures */
305 int wehaveauthed; /* We've managed to logon at least once! */
306 int wehavesentauthnote; /* We've sent an authorization failure note */
307 int wedged; /* wedged by auth failures or timeouts? */
308 char *smtphost; /* actual SMTP host we connected to */
309 int smtp_socket; /* socket descriptor for SMTP connection */
310 unsigned int uid; /* UID of user to deliver to */
311 struct idlist *skipped; /* messages skipped on the mail server */
312 struct idlist *oldsaved, *newsaved;
313 char *lastid; /* last Message-ID seen on this connection */
314 char *thisid; /* Message-ID of current message */
316 /* internal use -- per-message state */
317 int mimemsg; /* bitmask indicating MIME body-type */
318 char digest [DIGESTLEN]; /* md5 digest buffer */
320 /* internal use -- housekeeping */
321 struct query *next; /* next query control block in chain */
324 struct msgblk /* message header parsed for open_sink() */
326 char *headers; /* raw message headers */
327 struct idlist *recipients; /* addressees */
328 char return_path[HOSTLEN + USERNAMELEN + 4];
335 * Numeric option handling. Numeric option value of zero actually means
336 * it's unspecified. Value less than zero is zero. The reason for this
337 * screwy encoding is so we can zero out an option block in order to set the
338 * numeric flags in it to unspecified.
340 #define NUM_VALUE_IN(n) (((n) == 0) ? -1 : (n))
341 #define NUM_VALUE_OUT(n) (((n) < 0) ? 0 : (n))
342 #define NUM_NONZERO(n) ((n) > 0)
343 #define NUM_ZERO(n) ((n) < 0)
344 #define NUM_SPECIFIED(n) ((n) != 0)
346 #define MULTIDROP(ctl) (ctl->wildcard || \
347 ((ctl)->localnames && (ctl)->localnames->next))
350 * Note: tags are generated with an a%04d format from a 1-origin
351 * integer sequence number. Length 4 permits transaction numbers
352 * up to 9999, so we force rollover with % 10000. There's no special
353 * reason for this format other than to look like the exmples in the
356 #define TAGLEN 6 /* 'a' + 4 digits + NUL */
357 extern char tag[TAGLEN];
360 /* list of hosts assembled from run control file and command line */
361 extern struct query cmd_opts, *querylist;
363 /* what's returned by envquery */
364 extern void envquery(int, char **);
366 /* controls the detail level of status/progress messages written to stderr */
367 extern int outlevel; /* see the O_.* constants above */
368 extern int yydebug; /* enable parse debugging */
370 /* these get computed */
371 extern int batchcount; /* count of messages sent in current batch */
372 extern flag peek_capable; /* can we read msgs without setting seen? */
374 /* miscellaneous global controls */
375 extern struct runctl run; /* global controls for this run */
376 extern flag nodetach; /* if TRUE, don't detach daemon process */
377 extern flag quitmode; /* if --quit was set */
378 extern flag check_only; /* if --check was set */
379 extern char *rcfile; /* path name of rc file */
380 extern int linelimit; /* limit # lines retrieved per site */
381 extern flag versioninfo; /* emit only version info */
382 extern char *user; /* name of invoking user */
383 extern char *home; /* home directory of invoking user */
384 extern char *fmhome; /* fetchmail home directory */
385 extern int pass; /* number of re-polling pass */
386 extern flag configdump; /* dump control blocks as Python dictionary */
387 extern char *fetchmailhost; /* either "localhost" or an FQDN */
388 extern int suppress_tags; /* suppress tags in tagged protocols? */
389 extern char shroud[PASSWORDLEN*2+1]; /* string to shroud in debug output */
391 extern char *sdps_envfrom;
392 extern char *sdps_envto;
393 #endif /* SDPS_ENABLE */
395 /* prototypes for globally callable functions */
397 /* from /usr/include/sys/cdefs.h */
398 #if !defined __GNUC__ || __GNUC__ < 2
399 # define __attribute__(xyz) /* Ignore. */
402 /* error.c: Error reporting */
403 #if defined(HAVE_STDARG_H)
404 void report_init(int foreground);
405 void report (FILE *fp, const char *format, ...)
406 __attribute__ ((format (printf, 2, 3)))
408 void report_build (FILE *fp, const char *format, ...)
409 __attribute__ ((format (printf, 2, 3)))
411 void report_complete (FILE *fp, const char *format, ...)
412 __attribute__ ((format (printf, 2, 3)))
414 void report_at_line (FILE *fp, int, const char *, unsigned int, const char *, ...)
415 __attribute__ ((format (printf, 5, 6)))
419 void report_build ();
420 void report_complete ();
421 void report_at_line ();
424 /* driver.c -- main driver loop */
425 void set_timeout(int);
426 int do_protocol(struct query *, const struct method *);
428 /* transact.c: transaction support */
429 void init_transact(const struct method *);
430 int readheaders(int sock,
435 int readbody(int sock, struct query *ctl, flag forward, int len);
436 #if defined(HAVE_STDARG_H)
437 void gen_send(int sock, const char *, ... )
438 __attribute__ ((format (printf, 2, 3)))
440 int gen_recv(int sock, char *buf, int size);
441 int gen_transact(int sock, const char *, ... )
442 __attribute__ ((format (printf, 2, 3)))
449 extern struct msgblk msgblk;
451 /* lock.c: concurrency locking */
452 void lock_setup(void), lock_assert(void);
453 void lock_or_die(void), lock_release(void);
454 int lock_state(void);
455 void lock_dispose(void);
457 /* use these to track what was happening when the nonresponse timer fired */
458 #define GENERAL_WAIT 0 /* unknown wait type */
459 #define OPEN_WAIT 1 /* waiting from mailserver open */
460 #define SERVER_WAIT 2 /* waiting for mailserver response */
461 #define LISTENER_WAIT 3 /* waiting for listener initialization */
462 #define FORWARDING_WAIT 4 /* waiting for listener response */
465 /* response hooks can use this to identify the query stage */
466 #define STAGE_GETAUTH 0
467 #define STAGE_GETRANGE 1
468 #define STAGE_GETSIZES 2
469 #define STAGE_FETCH 3
471 #define STAGE_LOGOUT 5
474 extern int mytimeout;
476 /* mark values for name lists */
477 #define XMIT_ACCEPT 1 /* accepted; matches local domain or name */
478 #define XMIT_REJECT 2 /* rejected; no match */
479 #define XMIT_RCPTBAD 3 /* SMTP listener rejected the name */
482 int interruptible_idle(int interval);
484 /* sink.c: forwarding */
485 void smtp_close(struct query *, int);
486 int smtp_open(struct query *);
487 int stuffline(struct query *, char *);
488 int open_sink(struct query*, struct msgblk *, int*, int*);
489 void release_sink(struct query *);
490 int close_sink(struct query *, struct msgblk *, flag);
491 int open_warning_by_mail(struct query *, struct msgblk *);
492 #if defined(HAVE_STDARG_H)
493 void stuff_warning(struct query *, const char *, ... )
494 __attribute__ ((format (printf, 2, 3)))
497 void stuff_warning();
499 void close_warning_by_mail(struct query *, struct msgblk *);
501 /* rfc822.c: RFC822 header parsing */
502 unsigned char *reply_hack(unsigned char *, const unsigned char *);
503 unsigned char *nxtaddr(const unsigned char *);
505 /* uid.c: UID support */
506 void initialize_saved_lists(struct query *, const char *);
507 struct idlist *save_str(struct idlist **, const char *, flag);
508 void free_str_list(struct idlist **);
509 struct idlist *copy_str_list(struct idlist *idl);
510 void save_str_pair(struct idlist **, const char *, const char *);
511 void free_str_pair_list(struct idlist **);
512 int delete_str(struct idlist **, int);
513 int str_in_list(struct idlist **, const char *, const flag);
514 int str_nr_in_list(struct idlist **, const char *);
515 int str_nr_last_in_list(struct idlist **, const char *);
516 void str_set_mark( struct idlist **, const char *, const flag);
517 int count_list( struct idlist **idl );
518 char *str_from_nr_list( struct idlist **idl, int number );
519 char *str_find(struct idlist **, int);
520 char *idpair_find(struct idlist **, const char *);
521 void append_str_list(struct idlist **, struct idlist **);
522 void expunge_uids(struct query *);
523 void uid_swap_lists(struct query *);
524 void write_saved_lists(struct query *, const char *);
527 int prc_parse_file(const char *, const flag);
528 int prc_filecheck(const char *, const flag);
531 void to64frombits(unsigned char *, const unsigned char *, int);
532 int from64tobits(char *, const char *, int maxlen);
535 /* Bit-mask returned by MimeBodyType */
536 #define MSG_IS_7BIT 0x01
537 #define MSG_IS_8BIT 0x02
538 #define MSG_NEEDS_DECODE 0x80
539 extern void UnMimeHeader(unsigned char *buf);
540 extern int MimeBodyType(unsigned char *hdrs, int WantDecode);
541 extern int UnMimeBodyline(unsigned char **buf, flag delimited, flag issoftline);
544 void interface_init(void);
545 void interface_parse(char *, struct hostdata *);
546 void interface_note_activity(struct hostdata *);
547 int interface_approve(struct hostdata *, flag domonitor);
550 #if defined(HAVE_VOIDPOINTER)
551 #define XMALLOCTYPE void
553 #define XMALLOCTYPE char
555 XMALLOCTYPE *xmalloc(size_t);
556 XMALLOCTYPE *xrealloc(/*@null@*/ XMALLOCTYPE *, size_t);
557 char *xstrdup(const char *);
558 #if defined(HAVE_ALLOCA_H)
565 #define xalloca(ptr, t, n) if (!(ptr = (t) alloca(n)))\
566 {report(stderr, GT_("alloca failed")); exit(PS_UNDEFINED);}
569 * This is a hack to help xgettext which cannot find strings in
570 * macro definitions like the one for xalloca above.
572 static char *dummy = gettext_noop("alloca failed");
575 /* protocol driver and methods */
576 int doPOP2 (struct query *);
577 int doPOP3 (struct query *);
578 int doIMAP (struct query *);
579 int doETRN (struct query *);
580 int doODMR (struct query *);
582 /* authentication functions */
583 int do_cram_md5(int sock, char *command, struct query *ctl, char *strip);
584 int do_rfc1731(int sock, char *command, char *truename);
585 int do_gssauth(int sock, char *command, char *hostname, char *username);
586 int do_otp(int sock, char *command, struct query *ctl);
589 struct query *hostalloc(struct query *);
590 int parsecmdline (int, char **, struct runctl *, struct query *);
591 char *MD5Digest (unsigned char *);
592 void hmac_md5 (unsigned char *, size_t, unsigned char *, size_t, unsigned char *, size_t);
593 int POP3_auth_rpa(unsigned char *, unsigned char *, int socket);
594 void deal_with_sigchld(void);
595 int daemonize(const char *, void (*)(int));
596 char *fm_getpassword(char *);
597 void escapes(const char *, char *);
598 char *visbuf(const char *);
599 const char *showproto(int);
600 void dump_config(struct runctl *runp, struct query *querylist);
601 int is_host_alias(const char *, struct query *);
602 char *host_fqdn(void);
603 char *rfc822timestamp(void);
606 void yyerror(const char *);
610 void itimerthread(void*);
611 /* Have to include these first to avoid errors from redefining getcwd
612 and chdir. They're re-include protected in EMX, so it's okay, I
616 /* Redefine getcwd and chdir to get drive-letter support so we can
617 find all of our lock files and stuff. */
618 #define getcwd _getcwd2
619 #define chdir _chdir2
623 # ifndef strerror /* On some systems, strerror is a macro */
626 # endif /* HAVE_STRERROR */
628 #define STRING_DISABLED (char *)-1
629 #define STRING_DUMMY ""
633 #define S_IXGRP 0000010
637 #ifdef FETCHMAIL_DEBUG
638 #define exit(e) do { \
640 out = fopen("/tmp/fetchmail.log", "a"); \
642 "Exiting fetchmail from file %s, line %d with status %d\n", \
643 __FILE__, __LINE__, e); \
647 #endif /* FETCHMAIL_DEBUG */
649 /* fetchmail.h ends here */