src/src/local_scan.h

   1 /* $Cambridge: exim/src/src/local_scan.h,v 1.13 2009/11/16 19:50:37 nm4 Exp $ */
   2
   3 /*************************************************
   4 *     Exim - an Internet mail transport agent    *
   5 *************************************************/
   6
   7 /* Copyright (c) University of Cambridge 1995 - 2009 */
   8 /* See the file NOTICE for conditions of use and distribution. */
   9
  10 /* This file is the header that is the only Exim header to be included in the
  11 source for the local_scan.c() function. It contains definitions that are made
  12 available for use in that function, and which are documented.
  13
  14 This API is also used for functions called by the ${dlfunc expansion item. */
  15
  16
  17 /* Some basic types that make some things easier, the Exim configuration
  18 settings, and the store functions. */
  19
  20 #include <stdarg.h>
  21 #include <sys/types.h>
  22 #include "config.h"
  23 #include "mytypes.h"
  24 #include "store.h"
  25
  26
  27 /* The function and its return codes. */
  28
  29 extern int local_scan(int, uschar **);
  30
  31 enum {
  32   LOCAL_SCAN_ACCEPT,              /* Accept */
  33   LOCAL_SCAN_ACCEPT_FREEZE,       /* Accept, but freeze */
  34   LOCAL_SCAN_ACCEPT_QUEUE,        /* Accept, but no immediate delivery */
  35   LOCAL_SCAN_REJECT,              /* Permanent rejection */
  36   LOCAL_SCAN_REJECT_NOLOGHDR,     /* Permanent rejection, no log header */
  37   LOCAL_SCAN_TEMPREJECT,          /* Temporary rejection */
  38   LOCAL_SCAN_TEMPREJECT_NOLOGHDR  /* Temporary rejection, no log header */
  39 };
  40
  41
  42 /* Functions called by ${dlfunc{file}{func}{arg}...} return one of the five
  43 status codes defined immediately below. The function's first argument is either
  44 the result of expansion, or the error message in case of failure. The second
  45 and third arguments are standard argument count and vector, comprising the
  46 {arg} values specified in the expansion item. */
  47
  48 typedef int exim_dlfunc_t(uschar **yield, int argc, uschar *argv[]);
  49
  50
  51 /* Return codes from the support functions lss_match_xxx(). These are also the
  52 codes that dynamically-loaded ${dlfunc functions must return. */
  53
  54 #define  OK            0          /* Successful match */
  55 #define  DEFER         1          /* Defer - some problem */
  56 #define  FAIL          2          /* Matching failed */
  57 #define  ERROR         3          /* Internal or config error */
  58
  59 /* Extra return code for ${dlfunc functions */
  60
  61 #define  FAIL_FORCED   4          /* "Forced" failure */
  62
  63
  64 /* Available logging destinations */
  65
  66 #define LOG_MAIN        1    /* Write to the main log */
  67 #define LOG_PANIC       2    /* Write to the panic log */
  68 #define LOG_REJECT     16    /* Write to the reject log, with headers */
  69
  70
  71 /* Accessible debugging bits */
  72
  73 #define D_v                          0x00000001
  74 #define D_local_scan                 0x00000002
  75
  76
  77 /* Option types that can be used for local_scan_options. The boolean ones
  78 MUST be last so that they are contiguous with the internal boolean specials. */
  79
  80 enum { opt_stringptr, opt_int, opt_octint, opt_mkint, opt_Kint, opt_fixed,
  81   opt_time, opt_bool };
  82
  83
  84 /* The length of message identification strings. This is the id used internally
  85 by exim. The external version for use in Received: strings has a leading 'E'
  86 added to ensure it starts with a letter. */
  87
  88 #define MESSAGE_ID_LENGTH 16
  89
  90 /* The offset to the start of the data in the data file - this allows for
  91 the name of the data file to be present in the first line. */
  92
  93 #define SPOOL_DATA_START_OFFSET (MESSAGE_ID_LENGTH+3)
  94
  95 /* Some people (Marc Merlin et al) are maintaining a patch that allows for
  96 dynamic local_scan() libraries. This code is not yet in Exim proper, but it
  97 helps the maintainers if we keep their ABI version numbers here. This may
  98 mutate into more general support later. The major number is increased when the
  99 ABI is changed in a non backward compatible way. The minor number is increased
 100 each time a new feature is added (in a way that doesn't break backward
 101 compatibility). */
 102
 103 #define LOCAL_SCAN_ABI_VERSION_MAJOR 1
 104 #define LOCAL_SCAN_ABI_VERSION_MINOR 1
 105 #define LOCAL_SCAN_ABI_VERSION \
 106   LOCAL_SCAN_ABI_VERSION_MAJOR.LOCAL_SCAN_ABI_VERSION_MINOR
 107
 108 /* Structure definitions that are documented as visible in the function. */
 109
 110 typedef struct header_line {
 111   struct header_line *next;
 112   int    type;
 113   int    slen;
 114   uschar *text;
 115 } header_line;
 116
 117 /* Entries in lists options are in this form. */
 118
 119 typedef struct {
 120   char   *name;
 121   int     type;
 122   void   *value;
 123 } optionlist;
 124
 125 /*Structure for holding information about an envelope address. The errors_to
 126 field is always NULL except for one_time aliases that had errors_to on the
 127 routers that generated them. */
 128
 129 typedef struct recipient_item {
 130   uschar *address;              /* the recipient address */
 131   int     pno;                  /* parent number for "one_time" alias, or -1 */
 132   uschar *errors_to;            /* the errors_to address or NULL */
 133 #ifdef EXPERIMENTAL_BRIGHTMAIL
 134   uschar *bmi_optin;
 135 #endif
 136 } recipient_item;
 137
 138
 139 /* Global variables that are documented as visible in the function. */
 140
 141 extern unsigned int debug_selector;    /* Debugging bits */
 142
 143 extern int     body_linecount;         /* Line count in body */
 144 extern int     body_zerocount;         /* Binary zero count in body */
 145 extern uschar *expand_string_message;  /* Error info for failing expansion */
 146 extern uschar *headers_charset;        /* Charset for RFC 2047 decoding */
 147 extern header_line *header_last;       /* Final header */
 148 extern header_line *header_list;       /* First header */
 149 extern BOOL    host_checking;          /* Set when checking a host */
 150 extern uschar *interface_address;      /* Interface for incoming call */
 151 extern int     interface_port;         /* Port number for incoming call */
 152 extern uschar *message_id;             /* Internal id of message being handled */
 153 extern uschar *received_protocol;      /* Name of incoming protocol */
 154 extern int     recipients_count;       /* Number of recipients */
 155 extern recipient_item *recipients_list;/* List of recipient addresses */
 156 extern unsigned char *sender_address;  /* Sender address */
 157 extern uschar *sender_host_address;    /* IP address of sender, as chars */
 158 extern uschar *sender_host_authenticated; /* Name of authentication mechanism */
 159 extern uschar *sender_host_name;       /* Host name from lookup */
 160 extern int     sender_host_port;       /* Port number of sender */
 161 extern BOOL    smtp_batched_input;     /* TRUE if SMTP batch (no interaction) */
 162 extern BOOL    smtp_input;             /* TRUE if input is via SMTP */
 163
 164
 165 /* Functions that are documented as visible in local_scan(). */
 166
 167 extern int     child_close(pid_t, int);
 168 extern pid_t   child_open(uschar **, uschar **, int, int *, int *, BOOL);
 169 extern pid_t   child_open_exim(int *);
 170 extern pid_t   child_open_exim2(int *, uschar *, uschar *);
 171 extern void    debug_printf(char *, ...) PRINTF_FUNCTION(1,2);
 172 extern uschar *expand_string(uschar *);
 173 extern void    header_add(int, char *, ...);
 174 extern void    header_add_at_position(BOOL, uschar *, BOOL, int, char *, ...);
 175 extern void    header_remove(int, uschar *);
 176 extern BOOL    header_testname(header_line *, uschar *, int, BOOL);
 177 extern BOOL    header_testname_incomplete(header_line *, uschar *, int, BOOL);
 178 extern void    log_write(unsigned int, int, char *format, ...);
 179 extern int     lss_b64decode(uschar *, uschar **);
 180 extern uschar *lss_b64encode(uschar *, int);
 181 extern int     lss_match_domain(uschar *, uschar *);
 182 extern int     lss_match_local_part(uschar *, uschar *, BOOL);
 183 extern int     lss_match_address(uschar *, uschar *, BOOL);
 184 extern int     lss_match_host(uschar *, uschar *, uschar *);
 185 extern void    receive_add_recipient(uschar *, int);
 186 extern BOOL    receive_remove_recipient(uschar *);
 187 extern uschar *rfc2047_decode(uschar *, BOOL, uschar *, int, int *, uschar **);
 188 extern int     smtp_fflush(void);
 189 extern void    smtp_printf(char *, ...) PRINTF_FUNCTION(1,2);
 190 extern void    smtp_vprintf(char *, va_list);
 191 extern uschar *string_copy(uschar *);
 192 extern uschar *string_copyn(uschar *, int);
 193 extern uschar *string_sprintf(char *, ...);
 194
 195 /* End of local_scan.h */