-$Cambridge: exim/doc/doc-txt/README.SIEVE,v 1.4 2005/05/03 10:02:27 ph10 Exp $
+$Cambridge: exim/doc/doc-txt/README.SIEVE,v 1.5 2005/06/17 10:47:05 ph10 Exp $
Notes on the Sieve implementation for Exim
Exim Implementation
-The Exim Sieve implementation offers the core as defined by RFC 3028, the
-"envelope" (RFC 3028), the "fileinto" (RFC 3028), the "copy" (RFC 3894)
-and the "vacation" (draft-ietf-sieve-vacation-01.txt) extension,
+The Exim Sieve implementation offers the core as defined by RFC 3028bis,
+the "envelope" (RFC 3028), the "fileinto" (RFC 3028), the "copy" (RFC
+3894) and the "vacation" (draft-ietf-sieve-vacation-02.txt) extension,
the "i;ascii-numeric" comparator, but not the "reject" extension.
Exim does not support MDMs, so adding it just to the sieve filter makes
little sense.
correct, but its character set can not be converted to UTF-8.
-Address Test For Multiple Addresses Per Header
-
-A header may contain multiple addresses. RFC 3028 does not explicitly
-specify how to deal with them, but since the "address" test checks if
-anything matches anything else, matching one address suffices to
-satify the condition. That makes it impossible to test if a header
-contains a certain set of addresses and no more, but it is more logical
-than letting the test fail if the header contains an additional address
-besides the one the test checks for.
-
-
Semantics Of Keep
The keep command is equivalent to fileinto "inbox": It saves the
String Arguments
There has been confusion if the string arguments to "require" are to be
-matched case-sensitive or not. This implementation matches them with
-the match type ":is" (default, see section 2.7.1) and the comparator
-"i;ascii-casemap" (default, see section 2.7.3). The RFC defines the
-command defaults clearly, so any different implementations violate RFC
-3028. The same is valid for comparator names, also specified as strings.
-
-
-Number Units
-
-There is a mistake in RFC 3028: The suffix G denotes gibi-, not tebibyte.
-The mistake os obvious, because RFC 3028 specifies G to denote 2^30
-(which is gibi, not tebi), and that's what this implementation uses as
-scaling factor for the suffix G.
+matched case-sensitive or not. The comparator default is case-insensitive
+comparison, but "require" does not allow to specify a comparator, so
+this default does not apply. Lacking a clear specification, matching
+the strings exactly makes most sense. The same is valid for comparator
+names, also specified as strings.
Sieve Syntax and Semantics
Default Subject
-The draft specifies that the default message subject is "Re: "
-plus the old subject, stripped by any leading "Re: " strings.
-This string is to be taken literally, unlike some software which
-matches a regular expression like "[rR][eE]: *". Using this
-subject is dangerous, because many mailing lists verify addresses
-by sending a secret key in the subject of a message, asking to
-reply to the message for confirmation. Using the default vacation
-subject confirms any subscription request of this kind, allowing
-to subscribe a third party to any mailing list, either to annoy
-the user or to declare spam as legitimate mail by proving to
-use opt-in. The draft specifies to use "Re: " in front of the
-subject, but this implementation uses "Auto: ", as suggested in
-RFC 3834, section 3.1.5.
+The draft specifies that the default message subject is "Auto: " plus
+the old subject. Using this subject is dangerous, because many mailing
+lists verify addresses by sending a secret key in the subject of a
+message, asking to reply to the message for confirmation. Using the
+default vacation subject confirms any subscription request of this kind,
+allowing to subscribe a third party to any mailing list, either to annoy
+the user or to declare spam as legitimate mail by proving to use opt-in.
Rate Limiting Responses
The draft requires that each implementation offers a global black list
of addresses that will never be replied to. Exim offers this as option
"never_mail" in the autoreply transport.
-
-
-Interaction With Other Sieve Elements
-
-The draft describes the interaction with vacation, discard, keep,
-fileinto and redirect. It MUST describe compatibility with other
-actions, but doesn't. In this implementation, vacation is compatible
-with any other action.
-/* $Cambridge: exim/src/src/sieve.c,v 1.11 2005/05/03 10:02:27 ph10 Exp $ */
+/* $Cambridge: exim/src/src/sieve.c,v 1.12 2005/06/17 10:47:05 ph10 Exp $ */
/*************************************************
* Exim - an Internet mail transport agent *
#undef RFC_EOL
/* Define this for development of the subaddress Sieve extension. */
-/* The code is currently broken. */
-#undef SUBADDRESS
+#define SUBADDRESS
/* Define this for the vacation Sieve extension. */
#define VACATION
int require_iascii_numeric;
};
-enum Comparator { COMP_OCTET, COMP_ASCII_CASEMAP, COMP_ASCII_NUMERIC };
+enum Comparator { COMP_OCTET, COMP_EN_ASCII_CASEMAP, COMP_ASCII_NUMERIC };
enum MatchType { MATCH_IS, MATCH_CONTAINS, MATCH_MATCHES };
#ifdef SUBADDRESS
enum AddressPart { ADDRPART_USER, ADDRPART_DETAIL, ADDRPART_LOCALPART, ADDRPART_DOMAIN, ADDRPART_ALL };
static const struct String str_copy={ str_copy_c, 4 };
static uschar str_iascii_casemap_c[]="i;ascii-casemap";
static const struct String str_iascii_casemap={ str_iascii_casemap_c, 15 };
+static uschar str_enascii_casemap_c[]="en;ascii-casemap";
+static const struct String str_enascii_casemap={ str_enascii_casemap_c, 16 };
static uschar str_ioctet_c[]="i;octet";
static const struct String str_ioctet={ str_ioctet_c, 7 };
static uschar str_iascii_numeric_c[]="i;ascii-numeric";
static const struct String str_iascii_numeric={ str_iascii_numeric_c, 15 };
static uschar str_comparator_iascii_casemap_c[]="comparator-i;ascii-casemap";
static const struct String str_comparator_iascii_casemap={ str_comparator_iascii_casemap_c, 26 };
+static uschar str_comparator_enascii_casemap_c[]="comparator-en;ascii-casemap";
+static const struct String str_comparator_enascii_casemap={ str_comparator_enascii_casemap_c, 27 };
static uschar str_comparator_ioctet_c[]="comparator-i;octet";
static const struct String str_comparator_ioctet={ str_comparator_ioctet_c, 18 };
static uschar str_comparator_iascii_numeric_c[]="comparator-i;ascii-numeric";
switch (co)
{
case COMP_OCTET: debug_printf("i;octet"); break;
- case COMP_ASCII_CASEMAP: debug_printf("i;ascii-casemap"); break;
+ case COMP_EN_ASCII_CASEMAP: debug_printf("en;ascii-casemap"); break;
case COMP_ASCII_NUMERIC: debug_printf("i;ascii-numeric"); break;
}
debug_printf("\"):\n");
if (eq_octet(needle,haystack,0)) r=1;
break;
}
- case COMP_ASCII_CASEMAP:
+ case COMP_EN_ASCII_CASEMAP:
{
if (eq_asciicase(needle,haystack,0)) r=1;
break;
for (h=*haystack; h.length; ++h.character,--h.length) if (eq_octet(needle,&h,1)) { r=1; break; }
break;
}
- case COMP_ASCII_CASEMAP:
+ case COMP_EN_ASCII_CASEMAP:
{
for (h=*haystack; h.length; ++h.character,--h.length) if (eq_asciicase(needle,&h,1)) { r=1; break; }
break;
if (eq_octetglob(needle,haystack)) r=1;
break;
}
- case COMP_ASCII_CASEMAP:
+ case COMP_EN_ASCII_CASEMAP:
{
if (eq_asciicaseglob(needle,haystack)) r=1;
break;
}
else if (eq_asciicase(&comparator_name,&str_iascii_casemap,0))
{
- *c=COMP_ASCII_CASEMAP;
+ *c=COMP_EN_ASCII_CASEMAP;
+ match=1;
+ }
+ else if (eq_asciicase(&comparator_name,&str_enascii_casemap,0))
+ {
+ *c=COMP_EN_ASCII_CASEMAP;
match=1;
}
else if (eq_asciicase(&comparator_name,&str_iascii_numeric,0))
*/
enum AddressPart addressPart=ADDRPART_ALL;
- enum Comparator comparator=COMP_ASCII_CASEMAP;
+ enum Comparator comparator=COMP_EN_ASCII_CASEMAP;
enum MatchType matchType=MATCH_IS;
struct String *hdr,*h,*key,*k;
int m;
<header-names: string-list> <key-list: string-list>
*/
- enum Comparator comparator=COMP_ASCII_CASEMAP;
+ enum Comparator comparator=COMP_EN_ASCII_CASEMAP;
enum MatchType matchType=MATCH_IS;
struct String *hdr,*h,*key,*k;
int m;
envelope-part is case insensitive "from" or "to"
*/
- enum Comparator comparator=COMP_ASCII_CASEMAP;
+ enum Comparator comparator=COMP_EN_ASCII_CASEMAP;
enum AddressPart addressPart=ADDRPART_ALL;
enum MatchType matchType=MATCH_IS;
struct String *env,*e,*key,*k;
fileinto-command = "fileinto" { fileinto-options } string ";"
fileinto-options =
fileinto-options =) [ ":copy" ]
- */
+ */
struct String folder;
uschar *s;
if (m==0) filter->errmsg=CUS "missing reason string";
return -1;
}
+ if (reason_is_mime)
+ {
+ uschar *s,*end;
+
+ for (s=reason.character,end=reason.character+reason.length; s<end && (*s&0x80)==0; ++s);
+ if (s<end)
+ {
+ filter->errmsg=CUS "MIME reason string contains 8bit text";
+ return -1;
+ }
+ }
if (parse_semicolon(filter)==-1) return -1;
if (exec)
if (subject.length==-1)
{
expand_header(&subject,&str_subject);
- while (subject.length>=4 && Ustrncmp(subject.character,"Re: ",4)==0)
- {
- subject.character+=4;
- subject.length-=4;
- }
capacity=6;
start=6;
subject.character=string_cat(US"Auto: ",&capacity,&start,subject.character,subject.length);
}
for (check=cap; check->character; ++check)
{
- if (eq_asciicase(check,&str_envelope,0)) filter->require_envelope=1;
- else if (eq_asciicase(check,&str_fileinto,0)) filter->require_fileinto=1;
+ if (eq_octet(check,&str_envelope,0)) filter->require_envelope=1;
+ else if (eq_octet(check,&str_fileinto,0)) filter->require_fileinto=1;
#ifdef SUBADDRESS
- else if (eq_asciicase(check,&str_subaddress,0)) filter->require_subaddress=1;
+ else if (eq_octet(check,&str_subaddress,0)) filter->require_subaddress=1;
#endif
#ifdef VACATION
- else if (eq_asciicase(check,&str_vacation,0))
+ else if (eq_octet(check,&str_vacation,0))
{
if (filter_test == FTEST_NONE && filter->vacation_directory == NULL)
{
filter->require_vacation=1;
}
#endif
- else if (eq_asciicase(check,&str_copy,0)) filter->require_copy=1;
- else if (eq_asciicase(check,&str_comparator_ioctet,0)) ;
- else if (eq_asciicase(check,&str_comparator_iascii_casemap,0)) ;
- else if (eq_asciicase(check,&str_comparator_iascii_numeric,0)) filter->require_iascii_numeric=1;
+ else if (eq_octet(check,&str_copy,0)) filter->require_copy=1;
+ else if (eq_octet(check,&str_comparator_ioctet,0)) ;
+ else if (eq_octet(check,&str_comparator_iascii_casemap,0)) ;
+ else if (eq_octet(check,&str_comparator_enascii_casemap,0)) ;
+ else if (eq_octet(check,&str_comparator_iascii_numeric,0)) filter->require_iascii_numeric=1;
else
{
filter->errmsg=CUS "unknown capability";
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