/************************************************* * Exim - an Internet mail transport agent * *************************************************/ /* Copyright (c) University of Cambridge 1995 - 2016 */ /* See the file NOTICE for conditions of use and distribution. */ /* These two macros make it possible to obtain the result of macro-expanding a string as a text string. This is sometimes useful for debugging output. */ #define mac_string(s) # s #define mac_expanded_string(s) mac_string(s) /* Number of elements of an array */ #define nelem(arr) (sizeof(arr) / sizeof(*arr)) /* When running in the test harness, the load average is fudged. */ #define OS_GETLOADAVG() \ (running_in_test_harness? (test_harness_load_avg += 10) : os_getloadavg()) /* The address_item structure has a word full of 1-bit flags. These macros manipulate them. */ #define setflag(addr,flag) addr->flags |= (flag) #define clearflag(addr,flag) addr->flags &= ~(flag) #define testflag(addr,flag) ((addr->flags & (flag)) != 0) #define testflagsall(addr,flag) ((addr->flags & (flag)) == (flag)) #define copyflag(addrnew,addrold,flag) \ addrnew->flags = (addrnew->flags & ~(flag)) | (addrold->flags & (flag)) #define orflag(addrnew,addrold,flag) \ addrnew->flags |= addrold->flags & (flag) /* For almost all calls to convert things to printing characters, we want to allow tabs. A macro just makes life a bit easier. */ #define string_printing(s) string_printing2((s), TRUE) /* We need a special return code for "no recipients and failed to send an error message". ANSI C defines only EXIT_FAILURE and EXIT_SUCCESS. On the assumption that these are always 1 and 0 on Unix systems ... */ #define EXIT_NORECIPIENTS 2 /* Character-handling macros. It seems that the set of standard functions in ctype.h aren't actually all that useful. One reason for this is that email is international, so the concept of using a locale to vary what they do is not helpful. Another problem is that in different operating systems, the libraries yield different results, even in the default locale. For example, Linux yields TRUE for iscntrl() for all characters > 127, whereas many other systems yield FALSE. For these reasons we define our own set of macros for a number of character testing functions. Ensure that all these tests treat their arguments as unsigned. */ #define mac_iscntrl(c) \ ((uschar)(c) < 32 || (uschar)(c) == 127) #define mac_iscntrl_or_special(c) \ ((uschar)(c) < 32 || strchr(" ()<>@,;:\\\".[]\177", (uschar)(c)) != NULL) #define mac_isgraph(c) \ ((uschar)(c) > 32 && (uschar)(c) != 127) #define mac_isprint(c) \ (((uschar)(c) >= 32 && (uschar)(c) <= 126) || c == '\t' || \ ((uschar)(c) > 127 && print_topbitchars)) /* Convenience for testing strings */ #define streqic(Foo, Bar) (strcmpic(Foo, Bar) == 0) /* When built with TLS support, the act of flushing SMTP output becomes a no-op once an SSL session is in progress. */ #ifdef SUPPORT_TLS #define mac_smtp_fflush() if (tls_in.active < 0) fflush(smtp_out); #else #define mac_smtp_fflush() fflush(smtp_out); #endif /* Define which ends of pipes are for reading and writing, as some systems don't make the file descriptors two-way. */ #define pipe_read 0 #define pipe_write 1 /* The RFC 1413 ident port */ #define IDENT_PORT 113 /* A macro to simplify testing bits in lookup types */ #define mac_islookup(a,b) ((lookup_list[a]->type & (b)) != 0) /* Debugging control */ #define DEBUG(x) if ((debug_selector & (x)) != 0) #define HDEBUG(x) if (host_checking || (debug_selector & (x)) != 0) #define PTR_CHK(ptr) \ do { \ if ((void *)ptr > (void *)store_get(0)) \ debug_printf("BUG: ptr '%s' beyond arena at %s:%d\n", \ mac_expanded_string(ptr), __FUNCTION__, __LINE__); \ } while(0) /* The default From: text for DSNs */ #define DEFAULT_DSN_FROM "Mail Delivery System " /* The size of the vector for saving/restoring address expansion pointers while verifying. This has to be explicit because it is referenced in more than one source module. */ #define ADDRESS_EXPANSIONS_COUNT 18 /* The maximum permitted number of command-line (-D) macro definitions. We need a limit only to make it easier to generate argument vectors for re-exec of Exim. */ #define MAX_CLMACROS 10 /* The number of integer variables available in filter files. If this is changed, then the tables in expand.c for accessing them must be changed too. */ #define FILTER_VARIABLE_COUNT 10 /* The size of the vector holding delay warning times */ #define DELAY_WARNING_SIZE 12 /* The size of the buffer holding the processing information string. */ #define PROCESS_INFO_SIZE 256 /* The size of buffer to get for constructing log entries. Make it big enough to hold all the headers from a normal kind of message. */ #define LOG_BUFFER_SIZE 8192 /* The size of the circular buffer that remembers recent SMTP commands */ #define SMTP_HBUFF_SIZE 20 /* The initial size of a big buffer for use in various places. It gets put into big_buffer_size and in some circumstances increased. It should be at least as long as the maximum path length. */ #if defined PATH_MAX && PATH_MAX > 16384 # define BIG_BUFFER_SIZE PATH_MAX #elif defined MAXPATHLEN && MAXPATHLEN > 16384 # define BIG_BUFFER_SIZE MAXPATHLEN #else # define BIG_BUFFER_SIZE 16384 #endif /* header size of pipe content currently: char id, char subid, char[5] length */ #define PIPE_HEADER_SIZE 7 /* This limits the length of data returned by local_scan(). Because it is written on the spool, it gets read into big_buffer. */ #define LOCAL_SCAN_MAX_RETURN (BIG_BUFFER_SIZE - 24) /* A limit to the length of an address. RFC 2821 limits the local part to 64 and the domain to 255, so this should be adequate, taking into account quotings etc. */ #define ADDRESS_MAXLENGTH 512 /* The length of the base names of spool files, which consist of an internal message id with a trailing "-H" or "-D" added. */ #define SPOOL_NAME_LENGTH (MESSAGE_ID_LENGTH+2) /* The maximum number of message ids to store in a waiting database record. */ #define WAIT_NAME_MAX 50 /* Wait this long before determining that a Proxy Protocol configured host isn't speaking the protocol, and so is disallowed. Can be moved to runtime configuration if per site settings become needed. */ #ifdef SUPPORT_PROXY #define PROXY_NEGOTIATION_TIMEOUT_SEC 3 #define PROXY_NEGOTIATION_TIMEOUT_USEC 0 #endif /* Fixed option values for all PCRE functions */ #define PCRE_COPT 0 /* compile */ #define PCRE_EOPT 0 /* exec */ /* Macros for trivial functions */ #define mac_ismsgid(s) \ (pcre_exec(regex_ismsgid,NULL,CS s,Ustrlen(s),0,PCRE_EOPT,NULL,0) >= 0) /* Options for dns_next_rr */ enum { RESET_NEXT, RESET_ANSWERS, RESET_AUTHORITY, RESET_ADDITIONAL }; /* Argument values for the time-of-day function */ enum { tod_log, tod_log_bare, tod_log_zone, tod_log_datestamp_daily, tod_log_datestamp_monthly, tod_zone, tod_full, tod_bsdin, tod_mbx, tod_epoch, tod_epoch_l, tod_zulu }; /* For identifying types of driver */ enum { DTYPE_NONE, DTYPE_ROUTER, DTYPE_TRANSPORT }; /* Error numbers for generating error messages when reading a message on the standard input. */ enum { ERRMESS_BADARGADDRESS, /* Bad address via argument list */ ERRMESS_BADADDRESS, /* Bad address read via -t */ ERRMESS_NOADDRESS, /* Message has no addresses */ ERRMESS_IGADDRESS, /* All -t addresses ignored */ ERRMESS_BADNOADDRESS, /* Bad address via -t, leaving none */ ERRMESS_IOERR, /* I/O error while reading a message */ ERRMESS_VLONGHEADER, /* Excessively long message header */ ERRMESS_VLONGHDRLINE, /* Excessively long single line in header */ ERRMESS_TOOBIG, /* Message too big */ ERRMESS_TOOMANYRECIP, /* Too many recipients */ ERRMESS_LOCAL_SCAN, /* Rejected by local scan */ ERRMESS_LOCAL_ACL /* Rejected by non-SMTP ACL */ #ifdef EXPERIMENTAL_DMARC ,ERRMESS_DMARC_FORENSIC /* DMARC Forensic Report */ #endif }; /* Error handling styles - set by option, and apply only when receiving a local message not via SMTP. */ enum { ERRORS_SENDER, /* Return to sender (default) */ ERRORS_STDERR /* Write on stderr */ }; /* Exec control values when Exim execs itself via child_exec_exim. */ enum { CEE_RETURN_ARGV, /* Don't exec, just build and return argv */ CEE_EXEC_EXIT, /* Just exit if exec fails */ CEE_EXEC_PANIC /* Panic-die if exec fails */ }; /* Bit values for filter_test */ #define FTEST_NONE 0 /* Not filter testing */ #define FTEST_USER 1 /* Testing user filter */ #define FTEST_SYSTEM 2 /* Testing system filter */ /* Returns from the routing, transport and authentication functions (not all apply to all of them). Some other functions also use these convenient values, and some additional values are used only by non-driver functions. OK, FAIL, DEFER, ERROR, and FAIL_FORCED are also declared in local_scan.h for use in the local_scan() function and in ${dlfunc loaded functions. Do not change them unilaterally. */ #define OK 0 /* Successful match */ #define DEFER 1 /* Defer - some problem */ #define FAIL 2 /* Matching failed */ #define ERROR 3 /* Internal or config error */ #define FAIL_FORCED 4 /* "Forced" failure */ /***********/ #define DECLINE 5 /* Declined to handle the address, pass to next router unless no_more is set */ #define PASS 6 /* Pass to next driver, or to pass_router, even if no_more is set */ #define DISCARD 7 /* Address routed to :blackhole: or "seen finish" */ #define SKIP 8 /* Skip this router (used in route_address only) */ #define REROUTED 9 /* Address was changed and child created*/ #define PANIC 10 /* Hard failed with internal error */ #define BAD64 11 /* Bad base64 data (auth) */ #define UNEXPECTED 12 /* Unexpected initial auth data */ #define CANCELLED 13 /* Authentication cancelled */ #define FAIL_SEND 14 /* send() failed in authenticator */ #define FAIL_DROP 15 /* Fail and drop connection (used in ACL) */ /* Returns from the deliver_message() function */ #define DELIVER_ATTEMPTED_NORMAL 0 /* Tried a normal delivery */ #define DELIVER_MUA_SUCCEEDED 1 /* Success when mua_wrapper is set */ #define DELIVER_MUA_FAILED 2 /* Failure when mua_wrapper is set */ #define DELIVER_NOT_ATTEMPTED 3 /* Not tried (no msg or is locked */ /* Returns from DNS lookup functions. */ enum { DNS_SUCCEED, DNS_NOMATCH, DNS_NODATA, DNS_AGAIN, DNS_FAIL }; /* Ending states when reading a message. The order is important. The test for having to swallow the rest of an SMTP message is whether the value is >= END_NOTENDED. */ #define END_NOTSTARTED 0 /* Message not started */ #define END_DOT 1 /* Message ended with '.' */ #define END_EOF 2 /* Message ended with EOF (error for SMTP) */ #define END_NOTENDED 3 /* Message reading not yet ended */ #define END_SIZE 4 /* Reading ended because message too big */ #define END_WERROR 5 /* Write error while reading the message */ /* Bit masks for debug and log selectors */ /* Assume words are 32 bits wide. Tiny waste of space on 64 bit platforms, but this ensures bit vectors always work the same way. */ #define BITWORDSIZE 32 /* This macro is for single-word bit vectors: the debug selector, and the first word of the log selector. */ #define BIT(n) (1 << (n)) /* And these are for multi-word vectors. */ #define BITWORD(n) ( (n) / BITWORDSIZE) #define BITMASK(n) (1 << (n) % BITWORDSIZE) #define BIT_CLEAR(s,z,n) ((s)[BITWORD(n)] &= ~BITMASK(n)) #define BIT_SET(s,z,n) ((s)[BITWORD(n)] |= BITMASK(n)) #define BIT_TEST(s,z,n) (((s)[BITWORD(n)] & BITMASK(n)) != 0) /* Used in globals.c for initializing bit_table structures. T will be either D or L correspondong to the debug and log selector bits declared below. */ #define BIT_TABLE(T,name) { US #name, T##i_##name } /* IOTA allows us to keep an implicit sequential count, like a simple enum, but we can have sequentially numbered identifiers which are not declared sequentially. We use this for more compact declarations of bit indexes and masks, alternating between sequential bit index and corresponding mask. */ #define IOTA(iota) (__LINE__ - iota) #define IOTA_INIT(zero) (__LINE__ - zero + 1) /* Options bits for debugging. DEBUG_BIT() declares both a bit index and the corresponding mask. Di_all is a special value recognized by decode_bits(). Exim's code assumes in a number of places that the debug_selector is one word, and this is exposed in the local_scan ABI. The D_v and D_local_scan bit masks are part of the local_scan API so are #defined in local_scan.h */ #define DEBUG_BIT(name) Di_##name = IOTA(Di_iota), D_##name = BIT(Di_##name) enum { Di_all = -1, Di_v = 0, Di_local_scan = 1, Di_iota = IOTA_INIT(2), DEBUG_BIT(acl), DEBUG_BIT(auth), DEBUG_BIT(deliver), DEBUG_BIT(dns), DEBUG_BIT(dnsbl), DEBUG_BIT(exec), DEBUG_BIT(expand), DEBUG_BIT(filter), DEBUG_BIT(hints_lookup), DEBUG_BIT(host_lookup), DEBUG_BIT(ident), DEBUG_BIT(interface), DEBUG_BIT(lists), DEBUG_BIT(load), DEBUG_BIT(lookup), DEBUG_BIT(memory), DEBUG_BIT(pid), DEBUG_BIT(process_info), DEBUG_BIT(queue_run), DEBUG_BIT(receive), DEBUG_BIT(resolver), DEBUG_BIT(retry), DEBUG_BIT(rewrite), DEBUG_BIT(route), DEBUG_BIT(timestamp), DEBUG_BIT(tls), DEBUG_BIT(transport), DEBUG_BIT(uid), DEBUG_BIT(verify), }; /* Multi-bit debug masks */ #define D_all 0xffffffff #define D_any (D_all & \ ~(D_v | \ D_pid | \ D_timestamp) ) #define D_default (0xffffffff & \ ~(D_expand | \ D_filter | \ D_interface | \ D_load | \ D_local_scan | \ D_memory | \ D_pid | \ D_timestamp | \ D_resolver)) /* Options bits for logging. Those that have values < BITWORDSIZE can be used in calls to log_write(). The others are put into later words in log_selector and are only ever tested independently, so they do not need bit mask declarations. The Li_all value is recognized specially by decode_bits(). */ #define LOG_BIT(name) Li_##name = IOTA(Li_iota), L_##name = BIT(Li_##name) enum { Li_all = -1, Li_iota = IOTA_INIT(0), LOG_BIT(address_rewrite), LOG_BIT(all_parents), LOG_BIT(connection_reject), LOG_BIT(delay_delivery), LOG_BIT(dnslist_defer), LOG_BIT(etrn), LOG_BIT(host_lookup_failed), LOG_BIT(lost_incoming_connection), LOG_BIT(queue_run), LOG_BIT(retry_defer), LOG_BIT(size_reject), LOG_BIT(skip_delivery), LOG_BIT(smtp_connection), LOG_BIT(smtp_incomplete_transaction), LOG_BIT(smtp_protocol_error), LOG_BIT(smtp_syntax_error), Li_8bitmime = BITWORDSIZE, Li_acl_warn_skipped, Li_arguments, Li_deliver_time, Li_delivery_size, Li_dnssec, Li_ident_timeout, Li_incoming_interface, Li_incoming_port, Li_outgoing_interface, Li_outgoing_port, Li_pid, Li_proxy, Li_queue_time, Li_queue_time_overall, Li_received_sender, Li_received_recipients, Li_rejected_header, Li_return_path_on_delivery, Li_sender_on_delivery, Li_sender_verify_fail, Li_smtp_confirmation, Li_smtp_mailauth, Li_smtp_no_mail, Li_subject, Li_tls_certificate_verified, Li_tls_cipher, Li_tls_peerdn, Li_tls_sni, Li_unknown_in_list, log_selector_size = BITWORD(Li_unknown_in_list) + 1 }; #define LOGGING(opt) BIT_TEST(log_selector, log_selector_size, Li_##opt) /* Private error numbers for delivery failures, set negative so as not to conflict with system errno values. Take care to maintain the string table exim_errstrings[] in log.c */ #define ERRNO_UNKNOWNERROR (-1) #define ERRNO_USERSLASH (-2) #define ERRNO_EXISTRACE (-3) #define ERRNO_NOTREGULAR (-4) #define ERRNO_NOTDIRECTORY (-5) #define ERRNO_BADUGID (-6) #define ERRNO_BADMODE (-7) #define ERRNO_INODECHANGED (-8) #define ERRNO_LOCKFAILED (-9) #define ERRNO_BADADDRESS2 (-10) #define ERRNO_FORBIDPIPE (-11) #define ERRNO_FORBIDFILE (-12) #define ERRNO_FORBIDREPLY (-13) #define ERRNO_MISSINGPIPE (-14) #define ERRNO_MISSINGFILE (-15) #define ERRNO_MISSINGREPLY (-16) #define ERRNO_BADREDIRECT (-17) #define ERRNO_SMTPCLOSED (-18) #define ERRNO_SMTPFORMAT (-19) #define ERRNO_SPOOLFORMAT (-20) #define ERRNO_NOTABSOLUTE (-21) #define ERRNO_EXIMQUOTA (-22) /* Exim-imposed quota */ #define ERRNO_HELD (-23) #define ERRNO_FILTER_FAIL (-24) /* Delivery filter process failure */ #define ERRNO_CHHEADER_FAIL (-25) /* Delivery add/remove header failure */ #define ERRNO_WRITEINCOMPLETE (-26) /* Delivery write incomplete error */ #define ERRNO_EXPANDFAIL (-27) /* Some expansion failed */ #define ERRNO_GIDFAIL (-28) /* Failed to get gid */ #define ERRNO_UIDFAIL (-29) /* Failed to get uid */ #define ERRNO_BADTRANSPORT (-30) /* Unset or non-existent transport */ #define ERRNO_MBXLENGTH (-31) /* MBX length mismatch */ #define ERRNO_UNKNOWNHOST (-32) /* Lookup failed routing or in smtp tpt */ #define ERRNO_FORMATUNKNOWN (-33) /* Can't match format in appendfile */ #define ERRNO_BADCREATE (-34) /* Creation outside home in appendfile */ #define ERRNO_LISTDEFER (-35) /* Can't check a list; lookup defer */ #define ERRNO_DNSDEFER (-36) /* DNS lookup defer */ #define ERRNO_TLSFAILURE (-37) /* Failed to start TLS session */ #define ERRNO_TLSREQUIRED (-38) /* Mandatory TLS session not started */ #define ERRNO_CHOWNFAIL (-39) /* Failed to chown a file */ #define ERRNO_PIPEFAIL (-40) /* Failed to create a pipe */ #define ERRNO_CALLOUTDEFER (-41) /* When verifying */ #define ERRNO_AUTHFAIL (-42) /* When required by client */ #define ERRNO_CONNECTTIMEOUT (-43) /* Used internally in smtp transport */ #define ERRNO_RCPT4XX (-44) /* RCPT gave 4xx error */ #define ERRNO_MAIL4XX (-45) /* MAIL gave 4xx error */ #define ERRNO_DATA4XX (-46) /* DATA gave 4xx error */ #define ERRNO_PROXYFAIL (-47) /* Negotiation failed for proxy configured host */ #define ERRNO_AUTHPROB (-48) /* Authenticator "other" failure */ #ifdef SUPPORT_I18N # define ERRNO_UTF8_FWD (-49) /* target not supporting SMTPUTF8 */ #endif /* These must be last, so all retry deferments can easily be identified */ #define ERRNO_RETRY_BASE (-51) /* Base to test against */ #define ERRNO_RRETRY (-51) /* Not time for routing */ #define ERRNO_LRETRY (-52) /* Not time for local delivery */ #define ERRNO_HRETRY (-53) /* Not time for any remote host */ #define ERRNO_LOCAL_ONLY (-54) /* Local-only delivery */ #define ERRNO_QUEUE_DOMAIN (-55) /* Domain in queue_domains */ #define ERRNO_TRETRY (-56) /* Transport concurrency limit */ /* Special actions to take after failure or deferment. */ enum { SPECIAL_NONE, /* No special action */ SPECIAL_FREEZE, /* Freeze message */ SPECIAL_FAIL, /* Fail the delivery */ SPECIAL_WARN /* Send a warning message */ }; /* Flags that get ORed into the more_errno field of an address to give more information about errors for retry purposes. They are greater than 256, because the bottom byte contains 'A' or 'M' for remote addresses, to indicate whether the name was looked up only via an address record or whether MX records were used, respectively. */ #define RTEF_CTOUT 0x0100 /* Connection timed out */ /* Permission and other options for parse_extract_addresses(), filter_interpret(), and rda_interpret(), i.e. what special things are allowed in redirection operations. Not all apply to all cases. Some of the bits allow and some forbid, reflecting the "allow" and "forbid" options in the redirect router, which were chosen to represent the standard situation for users' .forward files. */ #define RDO_BLACKHOLE 0x00000001 /* Forbid :blackhole: */ #define RDO_DEFER 0x00000002 /* Allow :defer: or "defer" */ #define RDO_EACCES 0x00000004 /* Ignore EACCES */ #define RDO_ENOTDIR 0x00000008 /* Ignore ENOTDIR */ #define RDO_EXISTS 0x00000010 /* Forbid "exists" in expansion in filter */ #define RDO_FAIL 0x00000020 /* Allow :fail: or "fail" */ #define RDO_FILTER 0x00000040 /* Allow a filter script */ #define RDO_FREEZE 0x00000080 /* Allow "freeze" */ #define RDO_INCLUDE 0x00000100 /* Forbid :include: */ #define RDO_LOG 0x00000200 /* Forbid "log" */ #define RDO_LOOKUP 0x00000400 /* Forbid "lookup" in expansion in filter */ #define RDO_PERL 0x00000800 /* Forbid "perl" in expansion in filter */ #define RDO_READFILE 0x00001000 /* Forbid "readfile" in exp in filter */ #define RDO_READSOCK 0x00002000 /* Forbid "readsocket" in exp in filter */ #define RDO_RUN 0x00004000 /* Forbid "run" in expansion in filter */ #define RDO_DLFUNC 0x00008000 /* Forbid "dlfunc" in expansion in filter */ #define RDO_REALLOG 0x00010000 /* Really do log (not testing/verifying) */ #define RDO_REWRITE 0x00020000 /* Rewrite generated addresses */ #define RDO_EXIM_FILTER 0x00040000 /* Forbid Exim filters */ #define RDO_SIEVE_FILTER 0x00080000 /* Forbid Sieve filters */ #define RDO_PREPEND_HOME 0x00100000 /* Prepend $home to relative paths in Exim filter save commands */ /* This is the set that apply to expansions in filters */ #define RDO_FILTER_EXPANSIONS \ (RDO_EXISTS|RDO_LOOKUP|RDO_PERL|RDO_READFILE|RDO_READSOCK|RDO_RUN|RDO_DLFUNC) /* As well as the RDO bits themselves, we need the bit numbers in order to access (most of) the individual bits as separate options. This could be automated, but I haven't bothered. Keep this list in step with the above! */ enum { RDON_BLACKHOLE, RDON_DEFER, RDON_EACCES, RDON_ENOTDIR, RDON_EXISTS, RDON_FAIL, RDON_FILTER, RDON_FREEZE, RDON_INCLUDE, RDON_LOG, RDON_LOOKUP, RDON_PERL, RDON_READFILE, RDON_READSOCK, RDON_RUN, RDON_DLFUNC, RDON_REALLOG, RDON_REWRITE, RDON_EXIM_FILTER, RDON_SIEVE_FILTER, RDON_PREPEND_HOME }; /* Results of filter or forward file processing. Some are only from a filter; some are only from a forward file. */ enum { FF_DELIVERED, /* Success, took significant action */ FF_NOTDELIVERED, /* Success, didn't take significant action */ FF_BLACKHOLE, /* Blackholing requested */ FF_DEFER, /* Defer requested */ FF_FAIL, /* Fail requested */ FF_INCLUDEFAIL, /* :include: failed */ FF_NONEXIST, /* Forward file does not exist */ FF_FREEZE, /* Freeze requested */ FF_ERROR /* We have a problem */ }; /* Values for identifying particular headers; printing characters are used, so they can be read in the spool file for those headers that are permanently marked. The lower case values don't get onto the spool; they are used only as return values from header_checkname(). */ #define htype_other ' ' /* Unspecified header */ #define htype_from 'F' #define htype_to 'T' #define htype_cc 'C' #define htype_bcc 'B' #define htype_id 'I' /* for message-id */ #define htype_reply_to 'R' #define htype_received 'P' /* P for Postmark */ #define htype_sender 'S' #define htype_old '*' /* Replaced header */ #define htype_date 'd' #define htype_return_path 'p' #define htype_delivery_date 'x' #define htype_envelope_to 'e' #define htype_subject 's' /* These values are used only when adding new headers from an ACL; they too never get onto the spool. The type of the added header is set by reference to the header name, by calling header_checkname(). */ #define htype_add_top 'a' #define htype_add_rec 'r' #define htype_add_bot 'z' #define htype_add_rfc 'f' /* Types of item in options lists. These are the bottom 8 bits of the "type" field, which is an int. The opt_void value is used for entries in tables that point to special types of value that are accessed only indirectly (e.g. the rewrite data that is built out of a string option.) We need to have some values visible in local_scan, so the following are declared there: opt_stringptr, opt_int, opt_octint, opt_mkint, opt_Kint, opt_fixed, opt_time, opt_bool To make sure we don't conflict, the local_scan.h values start from zero, and those defined here start from 32. The boolean ones must all be together so they can be easily tested as a group. That is the only use of opt_bool_last. */ enum { opt_bit = 32, opt_bool_verify, opt_bool_set, opt_expand_bool, opt_bool_last, opt_rewrite, opt_timelist, opt_uid, opt_gid, opt_uidlist, opt_gidlist, opt_expand_uid, opt_expand_gid, opt_func, opt_void }; /* There's a high-ish bit which is used to flag duplicate options, kept for compatibility, which shouldn't be output. Also used for hidden options that are automatically maintained from others. Another high bit is used to flag driver options that although private (so as to be settable only on some drivers), are stored in the instance block so as to be accessible from outside. A third high bit is set when an option is read, so as to be able to give an error if any option is set twice. Finally, there's a bit which is set when an option is set with the "hide" prefix, to prevent -bP from showing it to non-admin callers. The next byte up in the int is used to keep the bit number for booleans that are kept in one bit. */ #define opt_hidden 0x100 /* Private to Exim */ #define opt_public 0x200 /* Stored in the main instance block */ #define opt_set 0x400 /* Option is set */ #define opt_secure 0x800 /* "hide" prefix used */ #define opt_rep_con 0x1000 /* Can be appended to by a repeated line (condition) */ #define opt_rep_str 0x2000 /* Can be appended to by a repeated line (string) */ #define opt_mask 0x00ff /* Verify types when directing and routing */ enum { v_none, v_sender, v_recipient, v_expn }; /* Option flags for verify_address() */ #define vopt_fake_sender 0x0001 /* for verify=sender=
*/ #define vopt_is_recipient 0x0002 #define vopt_qualify 0x0004 #define vopt_expn 0x0008 #define vopt_callout_fullpm 0x0010 /* full postmaster during callout */ #define vopt_callout_random 0x0020 /* during callout */ #define vopt_callout_no_cache 0x0040 /* disable callout cache */ #define vopt_callout_recipsender 0x0080 /* use real sender to verify recip */ #define vopt_callout_recippmaster 0x0100 /* use postmaster to verify recip */ #define vopt_success_on_redirect 0x0200 /* Values for fields in callout cache records */ #define ccache_unknown 0 /* test hasn't been done */ #define ccache_accept 1 #define ccache_reject 2 /* All rejections except */ #define ccache_reject_mfnull 3 /* MAIL FROM:<> was rejected */ /* Options for lookup functions */ #define lookup_querystyle 1 /* query-style lookup */ #define lookup_absfile 2 /* requires absolute file name */ #define lookup_absfilequery 4 /* query-style starts with file name */ /* Status values for host_item blocks. Require hstatus_unusable and hstatus_unusable_expired to be last. */ enum { hstatus_unknown, hstatus_usable, hstatus_unusable, hstatus_unusable_expired }; /* Reasons why a host is unusable (for clearer log messages) */ enum { hwhy_unknown, hwhy_retry, hwhy_failed, hwhy_deferred, hwhy_ignored }; /* Domain lookup types for routers */ enum { lk_default, lk_byname, lk_bydns }; /* Values for the self_code fields */ enum { self_freeze, self_defer, self_send, self_reroute, self_pass, self_fail }; /* Flags for rewrite rules */ #define rewrite_sender 0x0001 #define rewrite_from 0x0002 #define rewrite_to 0x0004 #define rewrite_cc 0x0008 #define rewrite_bcc 0x0010 #define rewrite_replyto 0x0020 #define rewrite_all_headers 0x003F /* all header flags */ #define rewrite_envfrom 0x0040 #define rewrite_envto 0x0080 #define rewrite_all_envelope 0x00C0 /* all envelope flags */ #define rewrite_all (rewrite_all_headers | rewrite_all_envelope) #define rewrite_smtp 0x0100 /* rewrite at SMTP time */ #define rewrite_smtp_sender 0x0200 /* SMTP sender rewrite (allows <>) */ #define rewrite_qualify 0x0400 /* qualify if necessary */ #define rewrite_repeat 0x0800 /* repeat rewrite rule */ #define rewrite_whole 0x1000 /* option bit for headers */ #define rewrite_quit 0x2000 /* "no more" option */ /* Flags for log_write(); LOG_MAIN, LOG_PANIC, and LOG_REJECT are also in local_scan.h */ #define LOG_MAIN 1 /* Write to the main log */ #define LOG_PANIC 2 /* Write to the panic log */ #define LOG_PANIC_DIE 6 /* Write to the panic log and then die */ #define LOG_REJECT 16 /* Write to the reject log, with headers */ #define LOG_SENDER 32 /* Add raw sender to the message */ #define LOG_RECIPIENTS 64 /* Add raw recipients to the message */ #define LOG_CONFIG 128 /* Add "Exim configuration error" */ #define LOG_CONFIG_FOR (256+128) /* Add " for" instead of ":\n" */ #define LOG_CONFIG_IN (512+128) /* Add " in line x[ of file y]" */ /* and for debug_bits() logging action control: */ #define DEBUG_FROM_CONFIG 0x0001 /* SMTP command identifiers for the smtp_connection_had field that records the most recent SMTP commands. Must be kept in step with the list of names in smtp_in.c that is used for creating the smtp_no_mail logging action. SCH_NONE is "empty". */ enum { SCH_NONE, SCH_AUTH, SCH_DATA, SCH_EHLO, SCH_ETRN, SCH_EXPN, SCH_HELO, SCH_HELP, SCH_MAIL, SCH_NOOP, SCH_QUIT, SCH_RCPT, SCH_RSET, SCH_STARTTLS, SCH_VRFY }; /* Returns from host_find_by{name,dns}() */ enum { HOST_FIND_FAILED, /* failed to find the host */ HOST_FIND_AGAIN, /* could not resolve at this time */ HOST_FOUND, /* found host */ HOST_FOUND_LOCAL, /* found, but MX points to local host */ HOST_IGNORED /* found but ignored - used internally only */ }; /* Flags for host_find_bydns() */ #define HOST_FIND_BY_SRV 0x0001 #define HOST_FIND_BY_MX 0x0002 #define HOST_FIND_BY_A 0x0004 #define HOST_FIND_QUALIFY_SINGLE 0x0008 #define HOST_FIND_SEARCH_PARENTS 0x0010 /* Actions applied to specific messages. */ enum { MSG_DELIVER, MSG_FREEZE, MSG_REMOVE, MSG_THAW, MSG_ADD_RECIPIENT, MSG_MARK_ALL_DELIVERED, MSG_MARK_DELIVERED, MSG_EDIT_SENDER, MSG_SHOW_COPY, MSG_LOAD, /* These ones must be last: a test for >= MSG_SHOW_BODY is used to test for actions that list individual spool files. */ MSG_SHOW_BODY, MSG_SHOW_HEADER, MSG_SHOW_LOG }; /* Returns from the spool_read_header() function */ enum { spool_read_OK, /* success */ spool_read_notopen, /* open failed */ spool_read_enverror, /* error in the envelope */ spool_read_hdrerror /* error in the headers */ }; /* Options for transport_write_message */ #define topt_add_return_path 0x001 #define topt_add_delivery_date 0x002 #define topt_add_envelope_to 0x004 #define topt_use_crlf 0x008 /* Terminate lines with CRLF */ #define topt_end_dot 0x010 /* Send terminting dot line */ #define topt_no_headers 0x020 /* Omit headers */ #define topt_no_body 0x040 /* Omit body */ #define topt_escape_headers 0x080 /* Apply escape check to headers */ /* Flags for recipient_block, used in DSN support */ #define rf_dsnlasthop 0x01 /* Do not propagate DSN any further */ #define rf_notify_never 0x02 /* NOTIFY= settings */ #define rf_notify_success 0x04 #define rf_notify_failure 0x08 #define rf_notify_delay 0x10 #define rf_dsnflags (rf_notify_never | rf_notify_success | \ rf_notify_failure | rf_notify_delay) /* DSN RET types */ #define dsn_ret_full 1 #define dsn_ret_hdrs 2 #define dsn_support_unknown 0 #define dsn_support_yes 1 #define dsn_support_no 2 /* Codes for the host_find_failed and host_all_ignored options. */ #define hff_freeze 0 #define hff_defer 1 #define hff_pass 2 #define hff_decline 3 #define hff_fail 4 #define hff_ignore 5 /* Router information flags */ #define ri_yestransport 0x0001 /* Must have a transport */ #define ri_notransport 0x0002 /* Must not have a transport */ /* Codes for match types in match_check_list; to any of them, MCL_NOEXPAND may be added */ #define MCL_NOEXPAND 16 enum { MCL_STRING, MCL_DOMAIN, MCL_HOST, MCL_ADDRESS, MCL_LOCALPART }; /* Codes for the places from which ACLs can be called. These are cunningly ordered to make it easy to implement tests for certain ACLs when processing "control" modifiers, by means of a maximum "where" value. Do not modify this order without checking carefully! **** IMPORTANT*** **** Furthermore, remember to keep these in step with the tables **** of names and response codes in globals.c. **** IMPORTANT **** */ enum { ACL_WHERE_RCPT, /* Some controls are for RCPT only */ ACL_WHERE_MAIL, /* ) */ ACL_WHERE_PREDATA, /* ) There are several tests for "in message", */ ACL_WHERE_MIME, /* ) implemented by <= WHERE_NOTSMTP */ ACL_WHERE_DKIM, /* ) */ ACL_WHERE_DATA, /* ) */ #ifndef DISABLE_PRDR ACL_WHERE_PRDR, /* ) */ #endif ACL_WHERE_NOTSMTP, /* ) */ ACL_WHERE_AUTH, /* These remaining ones are not currently */ ACL_WHERE_CONNECT, /* required to be in a special order so they */ ACL_WHERE_ETRN, /* are just alphabetical. */ ACL_WHERE_EXPN, ACL_WHERE_HELO, ACL_WHERE_MAILAUTH, ACL_WHERE_NOTSMTP_START, ACL_WHERE_NOTQUIT, ACL_WHERE_QUIT, ACL_WHERE_STARTTLS, ACL_WHERE_VRFY, ACL_WHERE_DELIVERY, ACL_WHERE_UNKNOWN /* Currently used by a ${acl:name} expansion */ }; /* Situations for spool_write_header() */ enum { SW_RECEIVING, SW_DELIVERING, SW_MODIFYING }; /* MX fields for hosts not obtained from MX records are always negative. MX_NONE is the default case; lesser values are used when the hosts are randomized in batches. */ #define MX_NONE (-1) /* host_item.port defaults to PORT_NONE; the only current case where this is changed before running the transport is when an dnslookup router sets an explicit port number. */ #define PORT_NONE (-1) /* Flags for single-key search defaults */ #define SEARCH_STAR 0x01 #define SEARCH_STARAT 0x02 /* Filter types */ enum { FILTER_UNSET, FILTER_FORWARD, FILTER_EXIM, FILTER_SIEVE }; /* Codes for ESMTP facilities offered by peer */ #define PEER_OFFERED_TLS BIT(0) #define PEER_OFFERED_IGNQ BIT(1) #define PEER_OFFERED_PRDR BIT(2) #define PEER_OFFERED_UTF8 BIT(3) #define PEER_OFFERED_DSN BIT(4) #define PEER_OFFERED_PIPE BIT(5) #define PEER_OFFERED_SIZE BIT(6) /* End of macros.h */