1 /* $Cambridge: exim/src/src/local_scan.h,v 1.10 2007/01/08 10:50:18 ph10 Exp $ */
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
7 /* Copyright (c) University of Cambridge 1995 - 2007 */
8 /* See the file NOTICE for conditions of use and distribution. */
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.
14 This API is also used for functions called by the ${dlfunc expansion item. */
17 /* Some basic types that make some things easier, the Exim configuration
18 settings, and the store functions. */
20 #include <sys/types.h>
26 /* The function and its return codes. */
28 extern int local_scan(int, uschar **);
31 LOCAL_SCAN_ACCEPT, /* Accept */
32 LOCAL_SCAN_ACCEPT_FREEZE, /* Accept, but freeze */
33 LOCAL_SCAN_ACCEPT_QUEUE, /* Accept, but no immediate delivery */
34 LOCAL_SCAN_REJECT, /* Permanent rejection */
35 LOCAL_SCAN_REJECT_NOLOGHDR, /* Permanent rejection, no log header */
36 LOCAL_SCAN_TEMPREJECT, /* Temporary rejection */
37 LOCAL_SCAN_TEMPREJECT_NOLOGHDR /* Temporary rejection, no log header */
41 /* Functions called by ${dlfunc{file}{func}{arg}...} return one of the five
42 status codes defined immediately below. The function's first argument is either
43 the result of expansion, or the error message in case of failure. The second
44 and third arguments are standard argument count and vector, comprising the
45 {arg} values specified in the expansion item. */
47 typedef int exim_dlfunc_t(uschar **yield, int argc, uschar *argv[]);
50 /* Return codes from the support functions lss_match_xxx(). These are also the
51 codes that dynamically-loaded ${dlfunc functions must return. */
53 #define OK 0 /* Successful match */
54 #define DEFER 1 /* Defer - some problem */
55 #define FAIL 2 /* Matching failed */
56 #define ERROR 3 /* Internal or config error */
58 /* Extra return code for ${dlfunc functions */
60 #define FAIL_FORCED 4 /* "Forced" failure */
63 /* Available logging destinations */
65 #define LOG_MAIN 1 /* Write to the main log */
66 #define LOG_PANIC 2 /* Write to the panic log */
67 #define LOG_REJECT 16 /* Write to the reject log, with headers */
70 /* Accessible debugging bits */
72 #define D_v 0x00000001
73 #define D_local_scan 0x00000002
76 /* Option types that can be used for local_scan_options. The boolean ones
77 MUST be last so that they are contiguous with the internal boolean specials. */
79 enum { opt_stringptr, opt_int, opt_octint, opt_mkint, opt_Kint, opt_fixed,
83 /* The length of message identification strings. This is the id used internally
84 by exim. The external version for use in Received: strings has a leading 'E'
85 added to ensure it starts with a letter. */
87 #define MESSAGE_ID_LENGTH 16
89 /* The offset to the start of the data in the data file - this allows for
90 the name of the data file to be present in the first line. */
92 #define SPOOL_DATA_START_OFFSET (MESSAGE_ID_LENGTH+3)
94 /* Some people (Marc Merlin et al) are maintaining a patch that allows for
95 dynamic local_scan() libraries. This code is not yet in Exim proper, but it
96 helps the maintainers if we keep their ABI version numbers here. This may
97 mutate into more general support later. The major number is increased when the
98 ABI is changed in a non backward compatible way. The minor number is increased
99 each time a new feature is added (in a way that doesn't break backward
102 #define LOCAL_SCAN_ABI_VERSION_MAJOR 1
103 #define LOCAL_SCAN_ABI_VERSION_MINOR 1
104 #define LOCAL_SCAN_ABI_VERSION \
105 LOCAL_SCAN_ABI_VERSION_MAJOR.LOCAL_SCAN_ABI_VERSION_MINOR
107 /* Structure definitions that are documented as visible in the function. */
109 typedef struct header_line {
110 struct header_line *next;
116 /* Entries in lists options are in this form. */
124 /*Structure for holding information about an envelope address. The errors_to
125 field is always NULL except for one_time aliases that had errors_to on the
126 routers that generated them. */
128 typedef struct recipient_item {
129 uschar *address; /* the recipient address */
130 int pno; /* parent number for "one_time" alias, or -1 */
131 uschar *errors_to; /* the errors_to address or NULL */
132 #ifdef EXPERIMENTAL_BRIGHTMAIL
138 /* Global variables that are documented as visible in the function. */
140 extern unsigned int debug_selector; /* Debugging bits */
142 extern uschar *expand_string_message; /* Error info for failing expansion */
143 extern uschar *headers_charset; /* Charset for RFC 2047 decoding */
144 extern header_line *header_last; /* Final header */
145 extern header_line *header_list; /* First header */
146 extern BOOL host_checking; /* Set when checking a host */
147 extern uschar *interface_address; /* Interface for incoming call */
148 extern int interface_port; /* Port number for incoming call */
149 extern uschar *message_id; /* Internal id of message being handled */
150 extern uschar *received_protocol; /* Name of incoming protocol */
151 extern int recipients_count; /* Number of recipients */
152 extern recipient_item *recipients_list;/* List of recipient addresses */
153 extern unsigned char *sender_address; /* Sender address */
154 extern uschar *sender_host_address; /* IP address of sender, as chars */
155 extern uschar *sender_host_authenticated; /* Name of authentication mechanism */
156 extern uschar *sender_host_name; /* Host name from lookup */
157 extern int sender_host_port; /* Port number of sender */
158 extern BOOL smtp_batched_input; /* TRUE if SMTP batch (no interaction) */
159 extern BOOL smtp_input; /* TRUE if input is via SMTP */
162 /* Functions that are documented as visible in local_scan(). */
164 extern int child_close(pid_t, int);
165 extern pid_t child_open(uschar **, uschar **, int, int *, int *, BOOL);
166 extern pid_t child_open_exim(int *);
167 extern pid_t child_open_exim2(int *, uschar *, uschar *);
168 extern void debug_printf(char *, ...) PRINTF_FUNCTION;
169 extern uschar *expand_string(uschar *);
170 extern void header_add(int, char *, ...);
171 extern void header_add_at_position(BOOL, uschar *, BOOL, int, char *, ...);
172 extern void header_remove(int, uschar *);
173 extern BOOL header_testname(header_line *, uschar *, int, BOOL);
174 extern BOOL header_testname_incomplete(header_line *, uschar *, int, BOOL);
175 extern void log_write(unsigned int, int, char *format, ...);
176 extern int lss_b64decode(uschar *, uschar **);
177 extern uschar *lss_b64encode(uschar *, int);
178 extern int lss_match_domain(uschar *, uschar *);
179 extern int lss_match_local_part(uschar *, uschar *, BOOL);
180 extern int lss_match_address(uschar *, uschar *, BOOL);
181 extern int lss_match_host(uschar *, uschar *, uschar *);
182 extern void receive_add_recipient(uschar *, int);
183 extern BOOL receive_remove_recipient(uschar *);
184 extern uschar *rfc2047_decode(uschar *, BOOL, uschar *, int, int *, uschar **);
185 extern int smtp_fflush(void);
186 extern void smtp_printf(char *, ...) PRINTF_FUNCTION;
187 extern uschar *string_copy(uschar *);
188 extern uschar *string_copyn(uschar *, int);
189 extern uschar *string_sprintf(char *, ...);
191 /* End of local_scan.h */