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 uschar *expand_multi_domain; /* ) */
152 BOOL multi_domain; /* ) */
153 BOOL overrides_hosts; /* ) Used only for remote transports */
154 int max_addresses; /* ) */
155 int connection_max_messages;/* ) */
156 /**************************************/
157 BOOL deliver_as_creator; /* Used only by pipe at present */
158 BOOL disable_logging; /* For very weird requirements */
159 BOOL initgroups; /* Initialize groups when setting uid */
160 BOOL uid_set; /* uid is set */
161 BOOL gid_set; /* gid is set */
164 uschar *expand_uid; /* Variable uid */
165 uschar *expand_gid; /* Variable gid */
166 uschar *warn_message; /* Used only by appendfile at present */
167 uschar *shadow; /* Name of shadow transport */
168 uschar *shadow_condition; /* Condition for running it */
169 uschar *filter_command; /* For on-the-fly-filtering */
170 uschar *add_headers; /* Add these headers */
171 uschar *remove_headers; /* Remove these headers */
172 uschar *return_path; /* Overriding (rewriting) return path */
173 uschar *debug_string; /* Debugging output */
174 uschar *message_size_limit; /* Biggest message this transport handles */
175 uschar *headers_rewrite; /* Rules for rewriting headers */
176 rewrite_rule *rewrite_rules; /* Parsed rewriting rules */
177 int rewrite_existflags; /* Bits showing which headers are rewritten */
178 int filter_timeout; /* For transport filter timing */
179 BOOL body_only; /* Deliver only the body */
180 BOOL delivery_date_add; /* Add Delivery-Date header */
181 BOOL envelope_to_add; /* Add Envelope-To header */
182 BOOL headers_only; /* Deliver only the headers */
183 BOOL rcpt_include_affixes; /* TRUE to retain affixes in RCPT commands */
184 BOOL return_path_add; /* Add Return-Path header */
185 BOOL return_output; /* TRUE if output should always be returned */
186 BOOL return_fail_output; /* ditto, but only on failure */
187 BOOL log_output; /* Similarly for logging */
188 BOOL log_fail_output;
189 BOOL log_defer_output;
190 BOOL retry_use_local_part; /* Defaults true for local, false for remote */
191 #ifdef EXPERIMENTAL_EVENT
192 uschar *event_action; /* String to expand on notable events */
194 } transport_instance;
197 /* Structure for holding information about a type of transport. The first six
198 fields must match driver_info above. */
200 typedef struct transport_info {
201 uschar *driver_name; /* Driver name */
202 optionlist *options; /* Table of private options names */
203 int *options_count; /* -> Number of entries in table */
204 void *options_block; /* Points to default private block */
205 int options_len; /* Length of same in bytes */
206 void (*init)( /* Initialization function */
207 struct transport_instance *);
209 BOOL (*code)( /* Main entry point */
210 transport_instance *,
211 struct address_item *);
212 void (*tidyup)( /* Tidyup function */
213 struct transport_instance *);
214 void (*closedown)( /* For closing down a passed channel */
215 struct transport_instance *);
216 BOOL local; /* TRUE for local transports */
221 /* Structure for holding information about the configured routers. */
223 typedef struct router_instance {
224 struct router_instance *next;
226 struct router_info *info;
227 void *options_block; /* Pointer to private options */
228 uschar *driver_name; /* Must be first */
230 uschar *address_data; /* Arbitrary data */
231 #ifdef EXPERIMENTAL_BRIGHTMAIL
232 uschar *bmi_rule; /* Brightmail AntiSpam rule checking */
234 uschar *cannot_route_message; /* Used when routing fails */
235 uschar *condition; /* General condition */
236 uschar *current_directory; /* For use during delivery */
237 uschar *debug_string; /* Debugging output */
238 uschar *domains; /* Specific domains */
239 uschar *errors_to; /* Errors address */
240 uschar *expand_gid; /* Expanded gid string */
241 uschar *expand_uid; /* Expanded uid string */
242 uschar *expand_more; /* Expanded more string */
243 uschar *expand_unseen; /* Expanded unseen string */
244 uschar *extra_headers; /* Additional headers */
245 uschar *fallback_hosts; /* For remote transports (text list) */
246 uschar *home_directory; /* For use during delivery */
247 uschar *ignore_target_hosts; /* Target hosts to ignore */
248 uschar *local_parts; /* Specific local parts */
249 uschar *pass_router_name; /* Router for passed address */
250 uschar *prefix; /* Address prefix */
251 uschar *redirect_router_name; /* Router for generated address */
252 uschar *remove_headers; /* Removed headers */
253 uschar *require_files; /* File checks before router is run */
254 uschar *router_home_directory; /* For use while routing */
255 uschar *self; /* Text option for handling self reference */
256 uschar *senders; /* Specific senders */
257 uschar *suffix; /* Address suffix */
258 uschar *translate_ip_address; /* IP address translation fudgery */
259 uschar *transport_name; /* Transport name */
261 BOOL address_test; /* Use this router when testing addresses */
262 #ifdef EXPERIMENTAL_BRIGHTMAIL
263 BOOL bmi_deliver_alternate; /* TRUE => BMI said that message should be delivered to alternate location */
264 BOOL bmi_deliver_default; /* TRUE => BMI said that message should be delivered to default location */
265 BOOL bmi_dont_deliver; /* TRUE => BMI said that message should not be delivered at all */
267 BOOL expn; /* Use this router when processing EXPN */
268 BOOL caseful_local_part; /* TRUE => don't lowercase */
269 BOOL check_local_user; /* TRUE => check local user */
270 BOOL disable_logging; /* For very weird requirements */
271 BOOL fail_verify_recipient; /* Fail verify if recipient match this router */
272 BOOL fail_verify_sender; /* Fail verify if sender match this router */
273 BOOL gid_set; /* Flag to indicate gid is set */
274 BOOL initgroups; /* TRUE if initgroups is required */
275 BOOL log_as_local; /* TRUE logs as a local delivery */
276 BOOL more; /* If FALSE, do no more if this one fails */
277 BOOL pass_on_timeout; /* Treat timeout DEFERs as fails */
278 BOOL prefix_optional; /* Just what it says */
279 BOOL repeat_use; /* If FALSE, skip if ancestor used it */
280 BOOL retry_use_local_part; /* Just what it says */
281 BOOL same_domain_copy_routing; /* TRUE => copy routing for same domain */
282 BOOL self_rewrite; /* TRUE to rewrite headers if making local */
283 BOOL suffix_optional; /* As it says */
284 BOOL verify_only; /* Skip this router if not verifying */
285 BOOL verify_recipient; /* Use this router when verifying a recipient*/
286 BOOL verify_sender; /* Use this router when verifying a sender */
287 BOOL uid_set; /* Flag to indicate uid is set */
288 BOOL unseen; /* If TRUE carry on, even after success */
289 BOOL dsn_lasthop; /* If TRUE, this router is a DSN endpoint */
291 int self_code; /* Encoded version of "self" */
292 uid_t uid; /* Fixed uid value */
293 gid_t gid; /* Fixed gid value */
295 host_item *fallback_hostlist; /* For remote transport (block chain) */
296 transport_instance *transport; /* Transport block (when found) */
297 struct router_instance *pass_router; /* Actual router for passed address */
298 struct router_instance *redirect_router; /* Actual router for generated address */
302 /* Structure for holding information about a type of router. The first six
303 fields must match driver_info above. */
305 typedef struct router_info {
307 optionlist *options; /* Table of private options names */
308 int *options_count; /* -> Number of entries in table */
309 void *options_block; /* Points to default private block */
310 int options_len; /* Length of same in bytes */
311 void (*init)( /* Initialization function */
312 struct router_instance *);
314 int (*code)( /* Main entry point */
316 struct address_item *,
319 struct address_item **,
320 struct address_item **,
321 struct address_item **,
322 struct address_item **);
323 void (*tidyup)( /* Tidyup function */
324 struct router_instance *);
325 int ri_flags; /* Descriptive flags */
329 /* Structure for holding information about a lookup type. */
331 #include "lookupapi.h"
334 /* Structure for holding information about the configured authentication
337 typedef struct auth_instance {
338 struct auth_instance *next;
339 uschar *name; /* Exim instance name */
340 struct auth_info *info; /* Pointer to driver info block */
341 void *options_block; /* Pointer to private options */
342 uschar *driver_name; /* Must be first */
343 uschar *advertise_condition; /* Are we going to advertise this?*/
344 uschar *client_condition; /* Should the client try this? */
345 uschar *public_name; /* Advertised name */
346 uschar *set_id; /* String to set when server as authenticated id */
347 uschar *set_client_id; /* String to set when client as client_authenticated id */
348 uschar *mail_auth_condition; /* Condition for AUTH on MAIL command */
349 uschar *server_debug_string; /* Debugging output */
350 uschar *server_condition; /* Authorization condition */
351 BOOL client; /* TRUE if client option(s) set */
352 BOOL server; /* TRUE if server options(s) set */
353 BOOL advertised; /* Set TRUE when advertised */
357 /* Structure for holding information about an authentication mechanism. The
358 first six fields must match driver_info above. */
360 typedef struct auth_info {
361 uschar *driver_name; /* e.g. "condition" */
362 optionlist *options; /* Table of private options names */
363 int *options_count; /* -> Number of entries in table */
364 void *options_block; /* Points to default private block */
365 int options_len; /* Length of same in bytes */
366 void (*init)( /* initialization function */
367 struct auth_instance *);
369 int (*servercode)( /* server function */
370 auth_instance *, /* the instance data */
371 uschar *); /* rest of AUTH command */
372 int (*clientcode)( /* client function */
373 struct auth_instance *,
374 struct smtp_inblock *, /* socket and input buffer */
375 struct smtp_outblock *, /* socket and output buffer */
376 int, /* command timeout */
377 uschar *, /* buffer for reading response */
378 int); /* sizeof buffer */
379 void (*version_report)( /* diagnostic version reporting */
380 FILE *); /* I/O stream to print to */
384 /* Structure for holding a single IP address and port; used for the chain of
385 addresses and ports for the local host. Make the char string large enough to
386 hold an IPv6 address. */
388 typedef struct ip_address_item {
389 struct ip_address_item *next;
391 BOOL v6_include_v4; /* Used in the daemon */
395 /* Structure for chaining together arbitrary strings. */
397 typedef struct string_item {
398 struct string_item *next;
402 /* Information about a soft delivery failure, for use when calculating
403 retry information. It's separate from the address block, because there
404 can be a chain of them for SMTP deliveries where multiple IP addresses
407 typedef struct retry_item {
408 struct retry_item *next; /* for chaining */
409 uschar *key; /* string identifying host/address/message */
410 int basic_errno; /* error code for this destination */
411 int more_errno; /* additional error information */
412 uschar *message; /* local error message */
413 int flags; /* see below */
416 /* Retry data flags */
418 #define rf_delete 0x0001 /* retry info is to be deleted */
419 #define rf_host 0x0002 /* retry info is for a remote host */
420 #define rf_message 0x0004 /* retry info is for a host+message */
422 /* Information about a constructed message that is to be sent using the
423 autoreply transport. This is pointed to from the address block. */
425 typedef struct reply_item {
426 uschar *from; /* ) */
427 uschar *reply_to; /* ) */
429 uschar *cc; /* ) specific header fields */
431 uschar *subject; /* ) */
432 uschar *headers; /* misc other headers, concatenated */
433 uschar *text; /* text string body */
434 uschar *file; /* file body */
435 BOOL file_expand; /* expand the body */
436 int expand_forbid; /* expansion lockout flags */
437 uschar *logfile; /* file to keep a log in */
438 uschar *oncelog; /* file to keep records in for once only */
439 time_t once_repeat; /* time to repeat "once only" */
440 BOOL return_message; /* send back the original message */
444 /* The address_item structure contains many fields which are used at various
445 times while delivering a message. Some are used only for remote deliveries;
446 some only for local. A particular set of fields is copied whenever a child
447 address is created. For convenience, we keep those fields in a separate
448 sub-structure so they can be copied in one go. This also means I won't forget
449 to edit the various copying places when new to-be-copied fields are added. */
451 typedef struct address_item_propagated {
452 uschar *address_data; /* arbitrary data to keep with the address */
453 uschar *domain_data; /* from "domains" lookup */
454 uschar *localpart_data; /* from "local_parts" lookup */
455 uschar *errors_address; /* where to send errors (NULL => sender) */
456 header_line *extra_headers; /* additional headers */
457 uschar *remove_headers; /* list of those to remove */
459 #ifdef EXPERIMENTAL_SRS
460 uschar *srs_sender; /* Change return path when delivering */
462 } address_item_propagated;
464 /* Bits for the flags field below */
466 #define af_allow_file 0x00000001 /* allow file in generated address */
467 #define af_allow_pipe 0x00000002 /* allow pipe in generated address */
468 #define af_allow_reply 0x00000004 /* allow autoreply in generated address */
469 #define af_dr_retry_exists 0x00000008 /* router retry record exists */
470 #define af_expand_pipe 0x00000010 /* expand pipe arguments */
471 #define af_file 0x00000020 /* file delivery; always with pfr */
472 #define af_gid_set 0x00000040 /* gid field is set */
473 #define af_home_expanded 0x00000080 /* home_dir is already expanded */
474 #define af_ignore_error 0x00000100 /* ignore delivery error */
475 #define af_initgroups 0x00000200 /* use initgroups() for local transporting */
476 #define af_local_host_removed 0x00000400 /* local host was backup */
477 #define af_lt_retry_exists 0x00000800 /* local transport retry exists */
478 #define af_pfr 0x00001000 /* pipe or file or reply delivery */
479 #define af_retry_skipped 0x00002000 /* true if retry caused some skipping */
480 #define af_retry_timedout 0x00004000 /* true if retry timed out */
481 #define af_uid_set 0x00008000 /* uid field is set */
482 #define af_hide_child 0x00010000 /* hide child in bounce/defer msgs */
483 #define af_sverify_told 0x00020000 /* sender verify failure notified */
484 #define af_verify_pmfail 0x00040000 /* verify failure was postmaster callout */
485 #define af_verify_nsfail 0x00080000 /* verify failure was null sender callout */
486 #define af_homonym 0x00100000 /* an ancestor has same address */
487 #define af_verify_routed 0x00200000 /* for cached sender verify: routed OK */
488 #define af_verify_callout 0x00400000 /* for cached sender verify: callout was specified */
489 #define af_include_affixes 0x00800000 /* delivered with affixes in RCPT */
490 #define af_cert_verified 0x01000000 /* delivered with verified TLS cert */
491 #define af_pass_message 0x02000000 /* pass message in bounces */
492 #define af_bad_reply 0x04000000 /* filter could not generate autoreply */
494 # define af_prdr_used 0x08000000 /* delivery used SMTP PRDR */
496 #define af_force_command 0x10000000 /* force_command in pipe transport */
497 #ifdef EXPERIMENTAL_DANE
498 # define af_dane_verified 0x20000000 /* TLS cert verify done with DANE */
501 /* These flags must be propagated when a child is created */
503 #define af_propagate (af_ignore_error)
505 /* The main address structure. Note that fields that are to be copied to
506 generated addresses should be put in the address_item_propagated structure (see
507 above) rather than directly into the address_item structure. */
509 typedef struct address_item {
510 struct address_item *next; /* for chaining addresses */
511 struct address_item *parent; /* parent address */
512 struct address_item *first; /* points to first after group delivery */
513 struct address_item *dupof; /* points to address this is a duplicate of */
515 router_instance *start_router; /* generated address starts here */
516 router_instance *router; /* the router that routed */
517 transport_instance *transport; /* the transport to use */
519 host_item *host_list; /* host data for the transport */
520 host_item *host_used; /* host that took delivery or failed hard */
521 host_item *fallback_hosts; /* to try if delivery defers */
523 reply_item *reply; /* data for autoreply */
524 retry_item *retries; /* chain of retry information */
526 uschar *address; /* address being delivered or routed */
527 uschar *unique; /* used for disambiguating */
528 uschar *cc_local_part; /* caseful local part */
529 uschar *lc_local_part; /* lowercased local part */
530 uschar *local_part; /* points to cc or lc version */
531 uschar *prefix; /* stripped prefix of local part */
532 uschar *suffix; /* stripped suffix of local part */
533 uschar *domain; /* working domain (lower cased) */
535 uschar *address_retry_key; /* retry key including full address */
536 uschar *domain_retry_key; /* retry key for domain only */
538 uschar *current_dir; /* current directory for transporting */
539 uschar *home_dir; /* home directory for transporting */
540 uschar *message; /* error message */
541 uschar *user_message; /* error message that can be sent over SMTP
542 or quoted in bounce message */
543 uschar *onetime_parent; /* saved original parent for onetime */
544 uschar **pipe_expandn; /* numeric expansions for pipe from filter */
545 uschar *return_filename; /* name of return file */
546 uschar *self_hostname; /* after self=pass */
547 uschar *shadow_message; /* info about shadow transporting */
550 uschar *cipher; /* Cipher used for transport */
551 void *ourcert; /* Certificate offered to peer, binary */
552 void *peercert; /* Certificate from peer, binary */
553 uschar *peerdn; /* DN of server's certificate */
554 int ocsp; /* OCSP status of peer cert */
557 uschar *authenticator; /* auth driver name used by transport */
558 uschar *auth_id; /* auth "login" name used by transport */
559 uschar *auth_sndr; /* AUTH arg to SMTP MAIL, used by transport */
561 uschar *dsn_orcpt; /* DSN orcpt value */
562 int dsn_flags; /* DSN flags */
563 int dsn_aware; /* DSN aware flag */
565 uid_t uid; /* uid for transporting */
566 gid_t gid; /* gid for transporting */
568 unsigned int flags; /* a row of bits, defined above */
569 unsigned int domain_cache[(MAX_NAMED_LIST * 2)/32];
570 unsigned int localpart_cache[(MAX_NAMED_LIST * 2)/32];
571 int mode; /* mode for local transporting to a file */
572 int more_errno; /* additional error information */
573 /* (may need to hold a timestamp) */
575 short int basic_errno; /* status after failure */
576 short int child_count; /* number of child addresses */
577 short int return_file; /* fileno of return data file */
578 short int special_action; /* ( used when when deferred or failed */
580 /* ( contains = or - when successful SMTP delivered */
582 /* ( contains verify rc in sender verify cache */
583 short int transport_return; /* result of delivery attempt */
584 address_item_propagated p; /* fields that are propagated to children */
587 /* The table of header names consists of items of this type */
596 /* Chain of information about errors (e.g. bad addresses) */
598 typedef struct error_block {
599 struct error_block *next;
604 /* Chain of file names when processing the queue */
606 typedef struct queue_filename {
607 struct queue_filename *next;
612 /* Chain of items of retry information, read from the retry config. */
614 typedef struct retry_rule {
615 struct retry_rule *next;
622 typedef struct retry_config {
623 struct retry_config *next;
631 /* Structure for each node in a tree, of which there are various kinds */
633 typedef struct tree_node {
634 struct tree_node *left; /* pointer to left child */
635 struct tree_node *right; /* pointer to right child */
638 void *ptr; /* pointer to data */
639 int val; /* or integer data */
641 uschar balance; /* balancing factor */
642 uschar name[1]; /* node name - variable length */
645 /* Structure for holding the handle and the cached last lookup for searches.
646 This block is pointed to by the tree entry for the file. The file can get
647 closed if too many are opened at once. There is a LRU chain for deciding which
650 typedef struct search_cache {
651 void *handle; /* lookup handle, or NULL if closed */
652 int search_type; /* search type */
653 tree_node *up; /* LRU up pointer */
654 tree_node *down; /* LRU down pointer */
655 tree_node *item_cache; /* tree of cached results */
658 /* Structure for holding a partially decoded DNS record; the name has been
659 uncompressed, but the data pointer is into the raw data. */
662 uschar name[DNS_MAXNAME]; /* domain name */
663 int type; /* record type */
664 int size; /* size of data */
665 uschar *data; /* pointer to data */
668 /* Structure for holding the result of a DNS query. */
671 int answerlen; /* length of the answer */
672 uschar answer[MAXPACKET]; /* the answer itself */
675 /* Structure for holding the intermediate data while scanning a DNS answer
679 int rrcount; /* count of RRs in the answer */
680 uschar *aptr; /* pointer in the answer while scanning */
681 dns_record srr; /* data from current record in scan */
684 /* Structure for holding a chain of IP addresses that are extracted from
685 an A, AAAA, or A6 record. For the first two, there is only ever one address,
686 but the chaining feature of A6 allows for several addresses to be realized from
687 a single initial A6 record. The structure defines the address field of length
688 1. In use, a suitable sized block is obtained to hold the complete textual
691 typedef struct dns_address {
692 struct dns_address *next;
696 /* Structure used for holding intermediate data during MD5 computations. */
700 unsigned int abcd[4];
704 /* Structure used for holding intermediate data during SHA-1 computations. */
706 typedef struct sha1 {
712 /* Structure used to hold incoming packets of SMTP responses for a specific
713 socket. The packets which may contain multiple lines (and in some cases,
714 multiple responses). */
716 typedef struct smtp_inblock {
717 int sock; /* the socket */
718 int buffersize; /* the size of the buffer */
719 uschar *ptr; /* current position in the buffer */
720 uschar *ptrend; /* end of data in the buffer */
721 uschar *buffer; /* the buffer itself */
724 /* Structure used to hold buffered outgoing packets of SMTP commands for a
725 specific socket. The packets which may contain multiple lines when pipelining
728 typedef struct smtp_outblock {
729 int sock; /* the socket */
730 int cmd_count; /* count of buffered commands */
731 int buffersize; /* the size of the buffer */
732 BOOL authenticating; /* TRUE when authenticating */
733 uschar *ptr; /* current position in the buffer */
734 uschar *buffer; /* the buffer itself */
737 /* Structure to hold information about the source of redirection information */
739 typedef struct redirect_block {
740 uschar *string; /* file name or string */
741 uid_t *owners; /* allowed file owners */
742 gid_t *owngroups; /* allowed file groups */
743 struct passwd *pw; /* possible owner if not NULL */
744 int modemask; /* forbidden bits */
745 BOOL isfile; /* TRUE if string is a file name */
746 BOOL check_owner; /* TRUE, FALSE, or TRUE_UNSET */
747 BOOL check_group; /* TRUE, FALSE, or TRUE_UNSET */
750 /* Structure for passing arguments to check_host() */
752 typedef struct check_host_block {
754 uschar *host_address;
759 /* Structure for remembering lookup data when caching the result of
760 a lookup in a named list. */
762 typedef struct namedlist_cacheblock {
763 struct namedlist_cacheblock *next;
766 } namedlist_cacheblock;
768 /* Structure for holding data for an entry in a named list */
770 typedef struct namedlist_block {
771 uschar *string; /* the list string */
772 namedlist_cacheblock *cache_data; /* cached domain_data or localpart_data */
773 int number; /* the number of the list for caching */
776 /* Structures for Access Control Lists */
778 typedef struct acl_condition_block {
779 struct acl_condition_block *next;
786 } acl_condition_block;
788 typedef struct acl_block {
789 struct acl_block *next;
790 acl_condition_block *condition;
794 /* End of structs.h */