e3793f7654
Note: As the first merge since the conversion to svn, it includes many propset changes to get the proper svn:eol-style and svn:mime-type on the files (as merged from the fixed up vendor/dist area). MFC after: 3 days
596 lines
16 KiB
C
596 lines
16 KiB
C
/*
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* Copyright (c) 1999-2004, 2006, 2008 Sendmail, Inc. and its suppliers.
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* All rights reserved.
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*
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* By using this file, you agree to the terms and conditions set
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* forth in the LICENSE file which can be found at the top level of
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* the sendmail distribution.
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*
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*
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* $Id: mfapi.h,v 8.78 2008/02/27 22:30:34 ca Exp $
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*/
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/*
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** MFAPI.H -- Global definitions for mail filter library and mail filters.
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*/
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#ifndef _LIBMILTER_MFAPI_H
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# define _LIBMILTER_MFAPI_H 1
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#ifndef SMFI_VERSION
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# define SMFI_VERSION 0x01000001 /* libmilter version number */
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#endif /* ! SMFI_VERSION */
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#define SM_LM_VRS_MAJOR(v) (((v) & 0x7f000000) >> 24)
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#define SM_LM_VRS_MINOR(v) (((v) & 0x007fff00) >> 8)
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#define SM_LM_VRS_PLVL(v) ((v) & 0x0000007f)
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# include <sys/types.h>
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# include <sys/socket.h>
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#include "libmilter/mfdef.h"
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# define LIBMILTER_API extern
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/* Only need to export C interface if used by C++ source code */
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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#ifndef _SOCK_ADDR
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# define _SOCK_ADDR struct sockaddr
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#endif /* ! _SOCK_ADDR */
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/*
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** libmilter functions return one of the following to indicate
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** success/failure(/continue):
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*/
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#define MI_SUCCESS 0
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#define MI_FAILURE (-1)
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#if _FFR_WORKERS_POOL
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# define MI_CONTINUE 1
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#endif /* _FFR_WORKERS_POOL */
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/* "forward" declarations */
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typedef struct smfi_str SMFICTX;
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typedef struct smfi_str *SMFICTX_PTR;
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typedef struct smfiDesc smfiDesc_str;
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typedef struct smfiDesc *smfiDesc_ptr;
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/*
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** Type which callbacks should return to indicate message status.
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** This may take on one of the SMFIS_* values listed below.
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*/
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typedef int sfsistat;
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#if defined(__linux__) && defined(__GNUC__) && defined(__cplusplus) && __GNUC_MINOR__ >= 8
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# define SM__P(X) __PMT(X)
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#else /* __linux__ && __GNUC__ && __cplusplus && _GNUC_MINOR__ >= 8 */
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# define SM__P(X) __P(X)
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#endif /* __linux__ && __GNUC__ && __cplusplus && _GNUC_MINOR__ >= 8 */
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/* Some platforms don't define __P -- do it for them here: */
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#ifndef __P
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# ifdef __STDC__
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# define __P(X) X
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# else /* __STDC__ */
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# define __P(X) ()
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# endif /* __STDC__ */
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#endif /* __P */
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#if SM_CONF_STDBOOL_H
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# include <stdbool.h>
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#else /* SM_CONF_STDBOOL_H */
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# ifndef __cplusplus
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# ifndef bool
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# ifndef __bool_true_false_are_defined
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typedef int bool;
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# define __bool_true_false_are_defined 1
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# endif /* ! __bool_true_false_are_defined */
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# endif /* bool */
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# endif /* ! __cplusplus */
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#endif /* SM_CONF_STDBOOL_H */
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/*
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** structure describing one milter
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*/
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struct smfiDesc
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{
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char *xxfi_name; /* filter name */
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int xxfi_version; /* version code -- do not change */
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unsigned long xxfi_flags; /* flags */
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/* connection info filter */
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sfsistat (*xxfi_connect) SM__P((SMFICTX *, char *, _SOCK_ADDR *));
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/* SMTP HELO command filter */
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sfsistat (*xxfi_helo) SM__P((SMFICTX *, char *));
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/* envelope sender filter */
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sfsistat (*xxfi_envfrom) SM__P((SMFICTX *, char **));
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/* envelope recipient filter */
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sfsistat (*xxfi_envrcpt) SM__P((SMFICTX *, char **));
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/* header filter */
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sfsistat (*xxfi_header) SM__P((SMFICTX *, char *, char *));
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/* end of header */
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sfsistat (*xxfi_eoh) SM__P((SMFICTX *));
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/* body block */
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sfsistat (*xxfi_body) SM__P((SMFICTX *, unsigned char *, size_t));
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/* end of message */
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sfsistat (*xxfi_eom) SM__P((SMFICTX *));
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/* message aborted */
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sfsistat (*xxfi_abort) SM__P((SMFICTX *));
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/* connection cleanup */
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sfsistat (*xxfi_close) SM__P((SMFICTX *));
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/* any unrecognized or unimplemented command filter */
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sfsistat (*xxfi_unknown) SM__P((SMFICTX *, const char *));
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/* SMTP DATA command filter */
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sfsistat (*xxfi_data) SM__P((SMFICTX *));
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/* negotiation callback */
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sfsistat (*xxfi_negotiate) SM__P((SMFICTX *,
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unsigned long, unsigned long,
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unsigned long, unsigned long,
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unsigned long *, unsigned long *,
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unsigned long *, unsigned long *));
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#if 0
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/* signal handler callback, not yet implemented. */
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int (*xxfi_signal) SM__P((int));
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#endif
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};
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LIBMILTER_API int smfi_opensocket __P((bool));
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LIBMILTER_API int smfi_register __P((struct smfiDesc));
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LIBMILTER_API int smfi_main __P((void));
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LIBMILTER_API int smfi_setbacklog __P((int));
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LIBMILTER_API int smfi_setdbg __P((int));
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LIBMILTER_API int smfi_settimeout __P((int));
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LIBMILTER_API int smfi_setconn __P((char *));
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LIBMILTER_API int smfi_stop __P((void));
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#if _FFR_MAXDATASIZE
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LIBMILTER_API size_t smfi_setmaxdatasize __P((size_t));
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#endif /* _FFR_MAXDATASIZE */
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LIBMILTER_API int smfi_version __P((unsigned int *, unsigned int *, unsigned int *));
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/*
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** What the filter might do -- values to be ORed together for
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** smfiDesc.xxfi_flags.
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*/
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#define SMFIF_NONE 0x00000000L /* no flags */
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#define SMFIF_ADDHDRS 0x00000001L /* filter may add headers */
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#define SMFIF_CHGBODY 0x00000002L /* filter may replace body */
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#define SMFIF_MODBODY SMFIF_CHGBODY /* backwards compatible */
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#define SMFIF_ADDRCPT 0x00000004L /* filter may add recipients */
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#define SMFIF_DELRCPT 0x00000008L /* filter may delete recipients */
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#define SMFIF_CHGHDRS 0x00000010L /* filter may change/delete headers */
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#define SMFIF_QUARANTINE 0x00000020L /* filter may quarantine envelope */
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/* filter may change "from" (envelope sender) */
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#define SMFIF_CHGFROM 0x00000040L
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#define SMFIF_ADDRCPT_PAR 0x00000080L /* add recipients incl. args */
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/* filter can send set of symbols (macros) that it wants */
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#define SMFIF_SETSYMLIST 0x00000100L
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/*
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** Macro "places";
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** Notes:
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** - must be coordinated with libmilter/engine.c and sendmail/milter.c
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** - the order MUST NOT be changed as it would break compatibility between
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** different versions. It's ok to append new entries however
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** (hence the list is not sorted by the SMT protocol steps).
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*/
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#define SMFIM_FIRST 0 /* Do NOT use, internal marker only */
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#define SMFIM_CONNECT 0 /* connect */
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#define SMFIM_HELO 1 /* HELO/EHLO */
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#define SMFIM_ENVFROM 2 /* MAIL From */
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#define SMFIM_ENVRCPT 3 /* RCPT To */
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#define SMFIM_DATA 4 /* DATA */
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#define SMFIM_EOM 5 /* end of message (final dot) */
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#define SMFIM_EOH 6 /* end of header */
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#define SMFIM_LAST 6 /* Do NOT use, internal marker only */
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/*
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** Continue processing message/connection.
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*/
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#define SMFIS_CONTINUE 0
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/*
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** Reject the message/connection.
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** No further routines will be called for this message
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** (or connection, if returned from a connection-oriented routine).
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*/
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#define SMFIS_REJECT 1
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/*
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** Accept the message,
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** but silently discard the message.
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** No further routines will be called for this message.
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** This is only meaningful from message-oriented routines.
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*/
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#define SMFIS_DISCARD 2
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/*
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** Accept the message/connection.
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** No further routines will be called for this message
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** (or connection, if returned from a connection-oriented routine;
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** in this case, it causes all messages on this connection
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** to be accepted without filtering).
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*/
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#define SMFIS_ACCEPT 3
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/*
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** Return a temporary failure, i.e.,
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** the corresponding SMTP command will return a 4xx status code.
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** In some cases this may prevent further routines from
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** being called on this message or connection,
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** although in other cases (e.g., when processing an envelope
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** recipient) processing of the message will continue.
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*/
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#define SMFIS_TEMPFAIL 4
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/*
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** Do not send a reply to the MTA
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*/
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#define SMFIS_NOREPLY 7
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/*
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** Skip over rest of same callbacks, e.g., body.
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*/
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#define SMFIS_SKIP 8
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/* xxfi_negotiate: use all existing protocol options/actions */
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#define SMFIS_ALL_OPTS 10
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#if 0
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/*
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** Filter Routine Details
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*/
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/* connection info filter */
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extern sfsistat xxfi_connect __P((SMFICTX *, char *, _SOCK_ADDR *));
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/*
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** xxfi_connect(ctx, hostname, hostaddr) Invoked on each connection
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**
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** char *hostname; Host domain name, as determined by a reverse lookup
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** on the host address.
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** _SOCK_ADDR *hostaddr; Host address, as determined by a getpeername
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** call on the SMTP socket.
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*/
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/* SMTP HELO command filter */
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extern sfsistat xxfi_helo __P((SMFICTX *, char *));
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/*
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** xxfi_helo(ctx, helohost) Invoked on SMTP HELO/EHLO command
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**
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** char *helohost; Value passed to HELO/EHLO command, which should be
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** the domain name of the sending host (but is, in practice,
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** anything the sending host wants to send).
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*/
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/* envelope sender filter */
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extern sfsistat xxfi_envfrom __P((SMFICTX *, char **));
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/*
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** xxfi_envfrom(ctx, argv) Invoked on envelope from
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**
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** char **argv; Null-terminated SMTP command arguments;
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** argv[0] is guaranteed to be the sender address.
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** Later arguments are the ESMTP arguments.
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*/
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/* envelope recipient filter */
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extern sfsistat xxfi_envrcpt __P((SMFICTX *, char **));
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/*
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** xxfi_envrcpt(ctx, argv) Invoked on each envelope recipient
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**
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** char **argv; Null-terminated SMTP command arguments;
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** argv[0] is guaranteed to be the recipient address.
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** Later arguments are the ESMTP arguments.
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*/
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/* unknown command filter */
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extern sfsistat *xxfi_unknown __P((SMFICTX *, const char *));
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/*
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** xxfi_unknown(ctx, arg) Invoked when SMTP command is not recognized or not
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** implemented.
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** const char *arg; Null-terminated SMTP command
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*/
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/* header filter */
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extern sfsistat xxfi_header __P((SMFICTX *, char *, char *));
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/*
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** xxfi_header(ctx, headerf, headerv) Invoked on each message header. The
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** content of the header may have folded white space (that is, multiple
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** lines with following white space) included.
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**
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** char *headerf; Header field name
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** char *headerv; Header field value
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*/
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/* end of header */
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extern sfsistat xxfi_eoh __P((SMFICTX *));
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/*
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** xxfi_eoh(ctx) Invoked at end of header
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*/
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/* body block */
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extern sfsistat xxfi_body __P((SMFICTX *, unsigned char *, size_t));
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/*
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** xxfi_body(ctx, bodyp, bodylen) Invoked for each body chunk. There may
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** be multiple body chunks passed to the filter. End-of-lines are
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** represented as received from SMTP (normally Carriage-Return/Line-Feed).
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**
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** unsigned char *bodyp; Pointer to body data
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** size_t bodylen; Length of body data
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*/
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/* end of message */
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extern sfsistat xxfi_eom __P((SMFICTX *));
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/*
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** xxfi_eom(ctx) Invoked at end of message. This routine can perform
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** special operations such as modifying the message header, body, or
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** envelope.
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*/
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/* message aborted */
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extern sfsistat xxfi_abort __P((SMFICTX *));
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/*
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** xxfi_abort(ctx) Invoked if message is aborted outside of the control of
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** the filter, for example, if the SMTP sender issues an RSET command. If
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** xxfi_abort is called, xxfi_eom will not be called and vice versa.
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*/
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/* connection cleanup */
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extern sfsistat xxfi_close __P((SMFICTX *));
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/*
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** xxfi_close(ctx) Invoked at end of the connection. This is called on
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** close even if the previous mail transaction was aborted.
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*/
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#endif /* 0 */
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/*
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** Additional information is passed in to the vendor filter routines using
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** symbols. Symbols correspond closely to sendmail macros. The symbols
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** defined depend on the context. The value of a symbol is accessed using:
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*/
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/* Return the value of a symbol. */
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LIBMILTER_API char * smfi_getsymval __P((SMFICTX *, char *));
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/*
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** Return the value of a symbol.
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**
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** SMFICTX *ctx; Opaque context structure
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** char *symname; The name of the symbol to access.
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*/
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/*
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** Vendor filter routines that want to pass additional information back to
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** the MTA for use in SMTP replies may call smfi_setreply before returning.
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*/
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LIBMILTER_API int smfi_setreply __P((SMFICTX *, char *, char *, char *));
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/*
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** Alternatively, smfi_setmlreply can be called if a multi-line SMTP reply
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** is needed.
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*/
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LIBMILTER_API int smfi_setmlreply __P((SMFICTX *, const char *, const char *, ...));
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/*
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** Set the specific reply code to be used in response to the active
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** command. If not specified, a generic reply code is used.
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**
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** SMFICTX *ctx; Opaque context structure
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** char *rcode; The three-digit (RFC 821) SMTP reply code to be
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** returned, e.g., ``551''.
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** char *xcode; The extended (RFC 2034) reply code, e.g., ``5.7.6''.
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** char *message; The text part of the SMTP reply.
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*/
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/*
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** The xxfi_eom routine is called at the end of a message (essentially,
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** after the final DATA dot). This routine can call some special routines
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** to modify the envelope, header, or body of the message before the
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** message is enqueued. These routines must not be called from any vendor
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** routine other than xxfi_eom.
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*/
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LIBMILTER_API int smfi_addheader __P((SMFICTX *, char *, char *));
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/*
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** Add a header to the message. It is not checked for standards
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** compliance; the mail filter must ensure that no protocols are violated
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** as a result of adding this header.
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**
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** SMFICTX *ctx; Opaque context structure
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** char *headerf; Header field name
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** char *headerv; Header field value
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*/
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LIBMILTER_API int smfi_chgheader __P((SMFICTX *, char *, int, char *));
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/*
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** Change/delete a header in the message. It is not checked for standards
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** compliance; the mail filter must ensure that no protocols are violated
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** as a result of adding this header.
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**
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** SMFICTX *ctx; Opaque context structure
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** char *headerf; Header field name
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** int index; The Nth occurence of header field name
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** char *headerv; New header field value (empty for delete header)
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*/
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LIBMILTER_API int smfi_insheader __P((SMFICTX *, int, char *, char *));
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/*
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** Insert a header into the message. It is not checked for standards
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** compliance; the mail filter must ensure that no protocols are violated
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** as a result of adding this header.
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**
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** SMFICTX *ctx; Opaque context structure
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** int idx; index into the header list where the insertion should happen
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** char *headerh; Header field name
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** char *headerv; Header field value
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*/
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LIBMILTER_API int smfi_chgfrom __P((SMFICTX *, char *, char *));
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/*
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** Modify envelope sender address
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**
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** SMFICTX *ctx; Opaque context structure
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** char *mail; New envelope sender address
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** char *args; ESMTP arguments
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*/
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LIBMILTER_API int smfi_addrcpt __P((SMFICTX *, char *));
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/*
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** Add a recipient to the envelope
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**
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** SMFICTX *ctx; Opaque context structure
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** char *rcpt; Recipient to be added
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*/
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LIBMILTER_API int smfi_addrcpt_par __P((SMFICTX *, char *, char *));
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/*
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** Add a recipient to the envelope
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**
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** SMFICTX *ctx; Opaque context structure
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** char *rcpt; Recipient to be added
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** char *args; ESMTP arguments
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*/
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LIBMILTER_API int smfi_delrcpt __P((SMFICTX *, char *));
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/*
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** Send a "no-op" up to the MTA to tell it we're still alive, so long
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** milter-side operations don't time out.
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**
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** SMFICTX *ctx; Opaque context structure
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*/
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LIBMILTER_API int smfi_progress __P((SMFICTX *));
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/*
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** Delete a recipient from the envelope
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**
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** SMFICTX *ctx; Opaque context structure
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** char *rcpt; Envelope recipient to be deleted. This should be in
|
|
** exactly the form passed to xxfi_envrcpt or the address may
|
|
** not be deleted.
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|
*/
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|
|
|
LIBMILTER_API int smfi_replacebody __P((SMFICTX *, unsigned char *, int));
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|
|
|
/*
|
|
** Replace the body of the message. This routine may be called multiple
|
|
** times if the body is longer than convenient to send in one call. End of
|
|
** line should be represented as Carriage-Return/Line Feed.
|
|
**
|
|
** char *bodyp; Pointer to block of body information to insert
|
|
** int bodylen; Length of data pointed at by bodyp
|
|
*/
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|
|
|
/*
|
|
** If the message is aborted (for example, if the SMTP sender sends the
|
|
** envelope but then does a QUIT or RSET before the data is sent),
|
|
** xxfi_abort is called. This can be used to reset state.
|
|
*/
|
|
|
|
/*
|
|
** Quarantine an envelope
|
|
**
|
|
** SMFICTX *ctx; Opaque context structure
|
|
** char *reason: explanation
|
|
*/
|
|
|
|
LIBMILTER_API int smfi_quarantine __P((SMFICTX *ctx, char *reason));
|
|
|
|
/*
|
|
** Connection-private data (specific to an SMTP connection) can be
|
|
** allocated using the smfi_setpriv routine; routines can access private
|
|
** data using smfi_getpriv.
|
|
*/
|
|
|
|
LIBMILTER_API int smfi_setpriv __P((SMFICTX *, void *));
|
|
|
|
/*
|
|
** Set the private data pointer
|
|
**
|
|
** SMFICTX *ctx; Opaque context structure
|
|
** void *privatedata; Pointer to private data area
|
|
*/
|
|
|
|
LIBMILTER_API void *smfi_getpriv __P((SMFICTX *));
|
|
|
|
/*
|
|
** Get the private data pointer
|
|
**
|
|
** SMFICTX *ctx; Opaque context structure
|
|
** void *privatedata; Pointer to private data area
|
|
*/
|
|
|
|
LIBMILTER_API int smfi_setsymlist __P((SMFICTX *, int, char *));
|
|
|
|
/*
|
|
** Set list of symbols (macros) to receive
|
|
**
|
|
** SMFICTX *ctx; Opaque context structure
|
|
** int where; where in the SMTP dialogue should the macros be sent
|
|
** char *macros; list of macros (space separated)
|
|
*/
|
|
|
|
#if _FFR_THREAD_MONITOR
|
|
LIBMILTER_API int smfi_set_max_exec_time __P((unsigned int));
|
|
#endif /* _FFR_THREAD_MONITOR */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif /* __cplusplus */
|
|
|
|
#endif /* ! _LIBMILTER_MFAPI_H */
|