1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2014 */
6 /* See the file NOTICE for conditions of use and distribution. */
9 /* Definitions of various structures. In addition, those that are visible for
10 the compilation of local_scan() are defined in local_scan.h. These are
16 For those declared here, we have to pre-declare some because of mutually
17 recursive definitions in the auths, routers, and transports blocks. */
25 struct transport_info;
28 /* Structure for remembering macros for the configuration file */
30 typedef struct macro_item {
31 struct macro_item *next;
37 /* Structure for bit tables for debugging and logging */
39 typedef struct bit_table {
44 /* Block for holding a uid and gid, possibly unset, and an initgroups flag. */
46 typedef struct ugid_block {
54 /* Structure for holding information about a host for use mainly by routers,
55 but also used when checking lists of hosts and when transporting. Looking up
56 host addresses is done using this structure. */
58 typedef enum {DS_UNK=-1, DS_NO, DS_YES} dnssec_status_t;
60 typedef struct host_item {
61 struct host_item *next;
62 uschar *name; /* Host name */
63 uschar *address; /* IP address in text form */
64 int port; /* port value in host order (if SRV lookup) */
65 int mx; /* MX value if found via MX records */
66 int sort_key; /* MX*1000 plus random "fraction" */
67 int status; /* Usable, unusable, or unknown */
68 int why; /* Why host is unusable */
69 int last_try; /* Time of last try if known */
70 dnssec_status_t dnssec;
73 /* Chain of rewrite rules, read from the rewrite config, or parsed from the
74 rewrite_headers field of a transport. */
76 typedef struct rewrite_rule {
77 struct rewrite_rule *next;
83 /* This structure is used to pass back configuration data from the smtp
84 transport to the outside world. It is used during callback processing. If ever
85 another remote transport were implemented, it could use the same structure. */
87 typedef struct transport_feedback {
100 /* Routers, transports, and authenticators have similar data blocks. Each
101 driver that is compiled into the code is represented by a xxx_info block; the
102 active drivers are represented by a chain of xxx_instance blocks. To make it
103 possible to use the same code for reading the configuration files for all
104 three, the layout of the start of the blocks is kept the same, and represented
105 by the generic structures driver_info and driver_instance. */
107 typedef struct driver_instance {
108 struct driver_instance *next;
109 uschar *name; /* Instance name */
110 struct driver_info *info; /* Points to info for this driver */
111 void *options_block; /* Pointer to private options */
112 uschar *driver_name; /* All start with this generic option */
115 typedef struct driver_info {
116 uschar *driver_name; /* Name of driver */
117 optionlist *options; /* Table of private options names */
118 int *options_count; /* -> Number of entries in table */
119 void *options_block; /* Points to default private block */
120 int options_len; /* Length of same in bytes */
121 void (*init)( /* Initialization entry point */
122 struct driver_instance *);
126 /* Structure for holding information about the configured transports. Some
127 of the generally accessible options are set from the configuration file; others
128 are set by transport initialization, since they can only be set for certain
129 transports. They need to be generally accessible, however, as they are used by
130 the main transport code. */
132 typedef struct transport_instance {
133 struct transport_instance *next;
134 uschar *name; /* Instance name */
135 struct transport_info *info; /* Info for this driver */
136 void *options_block; /* Pointer to private options */
137 uschar *driver_name; /* Must be first */
138 int (*setup)( /* Setup entry point */
139 struct transport_instance *,
140 struct address_item *,
141 struct transport_feedback *, /* For passing back config data */
142 uid_t, /* The uid that will be used */
143 gid_t, /* The gid that will be used */
144 uschar **); /* For an error message */
145 /**************************************/
146 int batch_max; /* ) */
147 uschar *batch_id; /* ) */
148 uschar *home_dir; /* ) Used only for local transports */
149 uschar *current_dir; /* ) */
150 /**************************************/
151 BOOL multi_domain; /* ) */
152 BOOL overrides_hosts; /* ) Used only for remote transports */
153 int max_addresses; /* ) */
154 int connection_max_messages;/* ) */
155 /**************************************/
156 BOOL deliver_as_creator; /* Used only by pipe at present */
157 BOOL disable_logging; /* For very weird requirements */
158 BOOL initgroups; /* Initialize groups when setting uid */
159 BOOL uid_set; /* uid is set */
160 BOOL gid_set; /* gid is set */
163 uschar *expand_uid; /* Variable uid */
164 uschar *expand_gid; /* Variable gid */
165 uschar *warn_message; /* Used only by appendfile at present */
166 uschar *shadow; /* Name of shadow transport */
167 uschar *shadow_condition; /* Condition for running it */
168 uschar *filter_command; /* For on-the-fly-filtering */
169 uschar *add_headers; /* Add these headers */
170 uschar *remove_headers; /* Remove these headers */
171 uschar *return_path; /* Overriding (rewriting) return path */
172 uschar *debug_string; /* Debugging output */
173 uschar *message_size_limit; /* Biggest message this transport handles */
174 uschar *headers_rewrite; /* Rules for rewriting headers */
175 rewrite_rule *rewrite_rules; /* Parsed rewriting rules */
176 int rewrite_existflags; /* Bits showing which headers are rewritten */
177 int filter_timeout; /* For transport filter timing */
178 BOOL body_only; /* Deliver only the body */
179 BOOL delivery_date_add; /* Add Delivery-Date header */
180 BOOL envelope_to_add; /* Add Envelope-To header */
181 BOOL headers_only; /* Deliver only the headers */
182 BOOL rcpt_include_affixes; /* TRUE to retain affixes in RCPT commands */
183 BOOL return_path_add; /* Add Return-Path header */
184 BOOL return_output; /* TRUE if output should always be returned */
185 BOOL return_fail_output; /* ditto, but only on failure */
186 BOOL log_output; /* Similarly for logging */
187 BOOL log_fail_output;
188 BOOL log_defer_output;
189 BOOL retry_use_local_part; /* Defaults true for local, false for remote */
190 #ifdef EXPERIMENTAL_TPDA
191 uschar *tpda_delivery_action; /* String to expand on success */
193 } transport_instance;
196 /* Structure for holding information about a type of transport. The first six
197 fields must match driver_info above. */
199 typedef struct transport_info {
200 uschar *driver_name; /* Driver name */
201 optionlist *options; /* Table of private options names */
202 int *options_count; /* -> Number of entries in table */
203 void *options_block; /* Points to default private block */
204 int options_len; /* Length of same in bytes */
205 void (*init)( /* Initialization function */
206 struct transport_instance *);
208 BOOL (*code)( /* Main entry point */
209 transport_instance *,
210 struct address_item *);
211 void (*tidyup)( /* Tidyup function */
212 struct transport_instance *);
213 void (*closedown)( /* For closing down a passed channel */
214 struct transport_instance *);
215 BOOL local; /* TRUE for local transports */
220 /* Structure for holding information about the configured routers. */
222 typedef struct router_instance {
223 struct router_instance *next;
225 struct router_info *info;
226 void *options_block; /* Pointer to private options */
227 uschar *driver_name; /* Must be first */
229 uschar *address_data; /* Arbitrary data */
230 #ifdef EXPERIMENTAL_BRIGHTMAIL
231 uschar *bmi_rule; /* Brightmail AntiSpam rule checking */
233 uschar *cannot_route_message; /* Used when routing fails */
234 uschar *condition; /* General condition */
235 uschar *current_directory; /* For use during delivery */
236 uschar *debug_string; /* Debugging output */
237 uschar *domains; /* Specific domains */
238 uschar *errors_to; /* Errors address */
239 uschar *expand_gid; /* Expanded gid string */
240 uschar *expand_uid; /* Expanded uid string */
241 uschar *expand_more; /* Expanded more string */
242 uschar *expand_unseen; /* Expanded unseen string */
243 uschar *extra_headers; /* Additional headers */
244 uschar *fallback_hosts; /* For remote transports (text list) */
245 uschar *home_directory; /* For use during delivery */
246 uschar *ignore_target_hosts; /* Target hosts to ignore */
247 uschar *local_parts; /* Specific local parts */
248 uschar *pass_router_name; /* Router for passed address */
249 uschar *prefix; /* Address prefix */
250 uschar *redirect_router_name; /* Router for generated address */
251 uschar *remove_headers; /* Removed headers */
252 uschar *require_files; /* File checks before router is run */
253 uschar *router_home_directory; /* For use while routing */
254 uschar *self; /* Text option for handling self reference */
255 uschar *senders; /* Specific senders */
256 uschar *suffix; /* Address suffix */
257 uschar *translate_ip_address; /* IP address translation fudgery */
258 uschar *transport_name; /* Transport name */
260 BOOL address_test; /* Use this router when testing addresses */
261 #ifdef EXPERIMENTAL_BRIGHTMAIL
262 BOOL bmi_deliver_alternate; /* TRUE => BMI said that message should be delivered to alternate location */
263 BOOL bmi_deliver_default; /* TRUE => BMI said that message should be delivered to default location */
264 BOOL bmi_dont_deliver; /* TRUE => BMI said that message should not be delivered at all */
266 BOOL expn; /* Use this router when processing EXPN */
267 BOOL caseful_local_part; /* TRUE => don't lowercase */
268 BOOL check_local_user; /* TRUE => check local user */
269 BOOL disable_logging; /* For very weird requirements */
270 BOOL fail_verify_recipient; /* Fail verify if recipient match this router */
271 BOOL fail_verify_sender; /* Fail verify if sender match this router */
272 BOOL gid_set; /* Flag to indicate gid is set */
273 BOOL initgroups; /* TRUE if initgroups is required */
274 BOOL log_as_local; /* TRUE logs as a local delivery */
275 BOOL more; /* If FALSE, do no more if this one fails */
276 BOOL pass_on_timeout; /* Treat timeout DEFERs as fails */
277 BOOL prefix_optional; /* Just what it says */
278 BOOL repeat_use; /* If FALSE, skip if ancestor used it */
279 BOOL retry_use_local_part; /* Just what it says */
280 BOOL same_domain_copy_routing; /* TRUE => copy routing for same domain */
281 BOOL self_rewrite; /* TRUE to rewrite headers if making local */
282 BOOL suffix_optional; /* As it says */
283 BOOL verify_only; /* Skip this router if not verifying */
284 BOOL verify_recipient; /* Use this router when verifying a recipient*/
285 BOOL verify_sender; /* Use this router when verifying a sender */
286 BOOL uid_set; /* Flag to indicate uid is set */
287 BOOL unseen; /* If TRUE carry on, even after success */
289 int self_code; /* Encoded version of "self" */
290 uid_t uid; /* Fixed uid value */
291 gid_t gid; /* Fixed gid value */
293 host_item *fallback_hostlist; /* For remote transport (block chain) */
294 transport_instance *transport; /* Transport block (when found) */
295 struct router_instance *pass_router; /* Actual router for passed address */
296 struct router_instance *redirect_router; /* Actual router for generated address */
300 /* Structure for holding information about a type of router. The first six
301 fields must match driver_info above. */
303 typedef struct router_info {
305 optionlist *options; /* Table of private options names */
306 int *options_count; /* -> Number of entries in table */
307 void *options_block; /* Points to default private block */
308 int options_len; /* Length of same in bytes */
309 void (*init)( /* Initialization function */
310 struct router_instance *);
312 int (*code)( /* Main entry point */
314 struct address_item *,
317 struct address_item **,
318 struct address_item **,
319 struct address_item **,
320 struct address_item **);
321 void (*tidyup)( /* Tidyup function */
322 struct router_instance *);
323 int ri_flags; /* Descriptive flags */
327 /* Structure for holding information about a lookup type. */
329 #include "lookupapi.h"
332 /* Structure for holding information about the configured authentication
335 typedef struct auth_instance {
336 struct auth_instance *next;
337 uschar *name; /* Exim instance name */
338 struct auth_info *info; /* Pointer to driver info block */
339 void *options_block; /* Pointer to private options */
340 uschar *driver_name; /* Must be first */
341 uschar *advertise_condition; /* Are we going to advertise this?*/
342 uschar *client_condition; /* Should the client try this? */
343 uschar *public_name; /* Advertised name */
344 uschar *set_id; /* String to set when server as authenticated id */
345 uschar *set_client_id; /* String to set when client as client_authenticated id */
346 uschar *mail_auth_condition; /* Condition for AUTH on MAIL command */
347 uschar *server_debug_string; /* Debugging output */
348 uschar *server_condition; /* Authorization condition */
349 BOOL client; /* TRUE if client option(s) set */
350 BOOL server; /* TRUE if server options(s) set */
351 BOOL advertised; /* Set TRUE when advertised */
355 /* Structure for holding information about an authentication mechanism. The
356 first six fields must match driver_info above. */
358 typedef struct auth_info {
359 uschar *driver_name; /* e.g. "condition" */
360 optionlist *options; /* Table of private options names */
361 int *options_count; /* -> Number of entries in table */
362 void *options_block; /* Points to default private block */
363 int options_len; /* Length of same in bytes */
364 void (*init)( /* initialization function */
365 struct auth_instance *);
367 int (*servercode)( /* server function */
368 auth_instance *, /* the instance data */
369 uschar *); /* rest of AUTH command */
370 int (*clientcode)( /* client function */
371 struct auth_instance *,
372 struct smtp_inblock *, /* socket and input buffer */
373 struct smtp_outblock *, /* socket and output buffer */
374 int, /* command timeout */
375 uschar *, /* buffer for reading response */
376 int); /* sizeof buffer */
377 void (*version_report)( /* diagnostic version reporting */
378 FILE *); /* I/O stream to print to */
382 /* Structure for holding a single IP address and port; used for the chain of
383 addresses and ports for the local host. Make the char string large enough to
384 hold an IPv6 address. */
386 typedef struct ip_address_item {
387 struct ip_address_item *next;
389 BOOL v6_include_v4; /* Used in the daemon */
393 /* Structure for chaining together arbitrary strings. */
395 typedef struct string_item {
396 struct string_item *next;
400 /* Information about a soft delivery failure, for use when calculating
401 retry information. It's separate from the address block, because there
402 can be a chain of them for SMTP deliveries where multiple IP addresses
405 typedef struct retry_item {
406 struct retry_item *next; /* for chaining */
407 uschar *key; /* string identifying host/address/message */
408 int basic_errno; /* error code for this destination */
409 int more_errno; /* additional error information */
410 uschar *message; /* local error message */
411 int flags; /* see below */
414 /* Retry data flags */
416 #define rf_delete 0x0001 /* retry info is to be deleted */
417 #define rf_host 0x0002 /* retry info is for a remote host */
418 #define rf_message 0x0004 /* retry info is for a host+message */
420 /* Information about a constructed message that is to be sent using the
421 autoreply transport. This is pointed to from the address block. */
423 typedef struct reply_item {
424 uschar *from; /* ) */
425 uschar *reply_to; /* ) */
427 uschar *cc; /* ) specific header fields */
429 uschar *subject; /* ) */
430 uschar *headers; /* misc other headers, concatenated */
431 uschar *text; /* text string body */
432 uschar *file; /* file body */
433 BOOL file_expand; /* expand the body */
434 int expand_forbid; /* expansion lockout flags */
435 uschar *logfile; /* file to keep a log in */
436 uschar *oncelog; /* file to keep records in for once only */
437 time_t once_repeat; /* time to repeat "once only" */
438 BOOL return_message; /* send back the original message */
442 /* The address_item structure contains many fields which are used at various
443 times while delivering a message. Some are used only for remote deliveries;
444 some only for local. A particular set of fields is copied whenever a child
445 address is created. For convenience, we keep those fields in a separate
446 sub-structure so they can be copied in one go. This also means I won't forget
447 to edit the various copying places when new to-be-copied fields are added. */
449 typedef struct address_item_propagated {
450 uschar *address_data; /* arbitrary data to keep with the address */
451 uschar *domain_data; /* from "domains" lookup */
452 uschar *localpart_data; /* from "local_parts" lookup */
453 uschar *errors_address; /* where to send errors (NULL => sender) */
454 header_line *extra_headers; /* additional headers */
455 uschar *remove_headers; /* list of those to remove */
457 #ifdef EXPERIMENTAL_SRS
458 uschar *srs_sender; /* Change return path when delivering */
460 } address_item_propagated;
462 /* Bits for the flags field below */
464 #define af_allow_file 0x00000001 /* allow file in generated address */
465 #define af_allow_pipe 0x00000002 /* allow pipe in generated address */
466 #define af_allow_reply 0x00000004 /* allow autoreply in generated address */
467 #define af_dr_retry_exists 0x00000008 /* router retry record exists */
468 #define af_expand_pipe 0x00000010 /* expand pipe arguments */
469 #define af_file 0x00000020 /* file delivery; always with pfr */
470 #define af_gid_set 0x00000040 /* gid field is set */
471 #define af_home_expanded 0x00000080 /* home_dir is already expanded */
472 #define af_ignore_error 0x00000100 /* ignore delivery error */
473 #define af_initgroups 0x00000200 /* use initgroups() for local transporting */
474 #define af_local_host_removed 0x00000400 /* local host was backup */
475 #define af_lt_retry_exists 0x00000800 /* local transport retry exists */
476 #define af_pfr 0x00001000 /* pipe or file or reply delivery */
477 #define af_retry_skipped 0x00002000 /* true if retry caused some skipping */
478 #define af_retry_timedout 0x00004000 /* true if retry timed out */
479 #define af_uid_set 0x00008000 /* uid field is set */
480 #define af_hide_child 0x00010000 /* hide child in bounce/defer msgs */
481 #define af_sverify_told 0x00020000 /* sender verify failure notified */
482 #define af_verify_pmfail 0x00040000 /* verify failure was postmaster callout */
483 #define af_verify_nsfail 0x00080000 /* verify failure was null sender callout */
484 #define af_homonym 0x00100000 /* an ancestor has same address */
485 #define af_verify_routed 0x00200000 /* for cached sender verify: routed OK */
486 #define af_verify_callout 0x00400000 /* for cached sender verify: callout was specified */
487 #define af_include_affixes 0x00800000 /* delivered with affixes in RCPT */
488 #define af_cert_verified 0x01000000 /* delivered with verified TLS cert */
489 #define af_pass_message 0x02000000 /* pass message in bounces */
490 #define af_bad_reply 0x04000000 /* filter could not generate autoreply */
491 #ifdef EXPERIMENTAL_PRDR
492 # define af_prdr_used 0x08000000 /* delivery used SMTP PRDR */
494 #define af_force_command 0x10000000 /* force_command in pipe transport */
496 /* These flags must be propagated when a child is created */
498 #define af_propagate (af_ignore_error)
500 /* The main address structure. Note that fields that are to be copied to
501 generated addresses should be put in the address_item_propagated structure (see
502 above) rather than directly into the address_item structure. */
504 typedef struct address_item {
505 struct address_item *next; /* for chaining addresses */
506 struct address_item *parent; /* parent address */
507 struct address_item *first; /* points to first after group delivery */
508 struct address_item *dupof; /* points to address this is a duplicate of */
510 router_instance *start_router; /* generated address starts here */
511 router_instance *router; /* the router that routed */
512 transport_instance *transport; /* the transport to use */
514 host_item *host_list; /* host data for the transport */
515 host_item *host_used; /* host that took delivery or failed hard */
516 host_item *fallback_hosts; /* to try if delivery defers */
518 reply_item *reply; /* data for autoreply */
519 retry_item *retries; /* chain of retry information */
521 uschar *address; /* address being delivered or routed */
522 uschar *unique; /* used for disambiguating */
523 uschar *cc_local_part; /* caseful local part */
524 uschar *lc_local_part; /* lowercased local part */
525 uschar *local_part; /* points to cc or lc version */
526 uschar *prefix; /* stripped prefix of local part */
527 uschar *suffix; /* stripped suffix of local part */
528 uschar *domain; /* working domain (lower cased) */
530 uschar *address_retry_key; /* retry key including full address */
531 uschar *domain_retry_key; /* retry key for domain only */
533 uschar *current_dir; /* current directory for transporting */
534 uschar *home_dir; /* home directory for transporting */
535 uschar *message; /* error message */
536 uschar *user_message; /* error message that can be sent over SMTP
537 or quoted in bounce message */
538 uschar *onetime_parent; /* saved original parent for onetime */
539 uschar **pipe_expandn; /* numeric expansions for pipe from filter */
540 uschar *return_filename; /* name of return file */
541 uschar *self_hostname; /* after self=pass */
542 uschar *shadow_message; /* info about shadow transporting */
545 uschar *cipher; /* Cipher used for transport */
546 void *ourcert; /* Certificate offered to peer, binary */
547 void *peercert; /* Certificate from peer, binary */
548 uschar *peerdn; /* DN of server's certificate */
549 int ocsp; /* OCSP status of peer cert */
552 uschar *authenticator; /* auth driver name used by transport */
553 uschar *auth_id; /* auth "login" name used by transport */
554 uschar *auth_sndr; /* AUTH arg to SMTP MAIL, used by transport */
556 uid_t uid; /* uid for transporting */
557 gid_t gid; /* gid for transporting */
559 unsigned int flags; /* a row of bits, defined above */
560 unsigned int domain_cache[(MAX_NAMED_LIST * 2)/32];
561 unsigned int localpart_cache[(MAX_NAMED_LIST * 2)/32];
562 int mode; /* mode for local transporting to a file */
563 int more_errno; /* additional error information */
564 /* (may need to hold a timestamp) */
566 short int basic_errno; /* status after failure */
567 short int child_count; /* number of child addresses */
568 short int return_file; /* fileno of return data file */
569 short int special_action; /* ( used when when deferred or failed */
571 /* ( contains = or - when successful SMTP delivered */
573 /* ( contains verify rc in sender verify cache */
574 short int transport_return; /* result of delivery attempt */
575 address_item_propagated p; /* fields that are propagated to children */
578 /* The table of header names consists of items of this type */
587 /* Chain of information about errors (e.g. bad addresses) */
589 typedef struct error_block {
590 struct error_block *next;
595 /* Chain of file names when processing the queue */
597 typedef struct queue_filename {
598 struct queue_filename *next;
603 /* Chain of items of retry information, read from the retry config. */
605 typedef struct retry_rule {
606 struct retry_rule *next;
613 typedef struct retry_config {
614 struct retry_config *next;
622 /* Structure for each node in a tree, of which there are various kinds */
624 typedef struct tree_node {
625 struct tree_node *left; /* pointer to left child */
626 struct tree_node *right; /* pointer to right child */
629 void *ptr; /* pointer to data */
630 int val; /* or integer data */
632 uschar balance; /* balancing factor */
633 uschar name[1]; /* node name - variable length */
636 /* Structure for holding the handle and the cached last lookup for searches.
637 This block is pointed to by the tree entry for the file. The file can get
638 closed if too many are opened at once. There is a LRU chain for deciding which
641 typedef struct search_cache {
642 void *handle; /* lookup handle, or NULL if closed */
643 int search_type; /* search type */
644 tree_node *up; /* LRU up pointer */
645 tree_node *down; /* LRU down pointer */
646 tree_node *item_cache; /* tree of cached results */
649 /* Structure for holding a partially decoded DNS record; the name has been
650 uncompressed, but the data pointer is into the raw data. */
653 uschar name[DNS_MAXNAME]; /* domain name */
654 int type; /* record type */
655 int size; /* size of data */
656 uschar *data; /* pointer to data */
659 /* Structure for holding the result of a DNS query. */
662 int answerlen; /* length of the answer */
663 uschar answer[MAXPACKET]; /* the answer itself */
666 /* Structure for holding the intermediate data while scanning a DNS answer
670 int rrcount; /* count of RRs in the answer */
671 uschar *aptr; /* pointer in the answer while scanning */
672 dns_record srr; /* data from current record in scan */
675 /* Structure for holding a chain of IP addresses that are extracted from
676 an A, AAAA, or A6 record. For the first two, there is only ever one address,
677 but the chaining feature of A6 allows for several addresses to be realized from
678 a single initial A6 record. The structure defines the address field of length
679 1. In use, a suitable sized block is obtained to hold the complete textual
682 typedef struct dns_address {
683 struct dns_address *next;
687 /* Structure used for holding intermediate data during MD5 computations. */
691 unsigned int abcd[4];
695 /* Structure used for holding intermediate data during SHA-1 computations. */
697 typedef struct sha1 {
703 /* Structure used to hold incoming packets of SMTP responses for a specific
704 socket. The packets which may contain multiple lines (and in some cases,
705 multiple responses). */
707 typedef struct smtp_inblock {
708 int sock; /* the socket */
709 int buffersize; /* the size of the buffer */
710 uschar *ptr; /* current position in the buffer */
711 uschar *ptrend; /* end of data in the buffer */
712 uschar *buffer; /* the buffer itself */
715 /* Structure used to hold buffered outgoing packets of SMTP commands for a
716 specific socket. The packets which may contain multiple lines when pipelining
719 typedef struct smtp_outblock {
720 int sock; /* the socket */
721 int cmd_count; /* count of buffered commands */
722 int buffersize; /* the size of the buffer */
723 BOOL authenticating; /* TRUE when authenticating */
724 uschar *ptr; /* current position in the buffer */
725 uschar *buffer; /* the buffer itself */
728 /* Structure to hold information about the source of redirection information */
730 typedef struct redirect_block {
731 uschar *string; /* file name or string */
732 uid_t *owners; /* allowed file owners */
733 gid_t *owngroups; /* allowed file groups */
734 struct passwd *pw; /* possible owner if not NULL */
735 int modemask; /* forbidden bits */
736 BOOL isfile; /* TRUE if string is a file name */
737 BOOL check_owner; /* TRUE, FALSE, or TRUE_UNSET */
738 BOOL check_group; /* TRUE, FALSE, or TRUE_UNSET */
741 /* Structure for passing arguments to check_host() */
743 typedef struct check_host_block {
745 uschar *host_address;
750 /* Structure for remembering lookup data when caching the result of
751 a lookup in a named list. */
753 typedef struct namedlist_cacheblock {
754 struct namedlist_cacheblock *next;
757 } namedlist_cacheblock;
759 /* Structure for holding data for an entry in a named list */
761 typedef struct namedlist_block {
762 uschar *string; /* the list string */
763 namedlist_cacheblock *cache_data; /* cached domain_data or localpart_data */
764 int number; /* the number of the list for caching */
767 /* Structures for Access Control Lists */
769 typedef struct acl_condition_block {
770 struct acl_condition_block *next;
777 } acl_condition_block;
779 typedef struct acl_block {
780 struct acl_block *next;
781 acl_condition_block *condition;
785 /* End of structs.h */