-/* $Cambridge: exim/src/src/expand.c,v 1.59 2006/09/05 14:05:43 ph10 Exp $ */
+/* $Cambridge: exim/src/src/expand.c,v 1.66 2006/10/30 14:59:15 ph10 Exp $ */
/*************************************************
* Exim - an Internet mail transport agent *
vtype_stringptr, /* value is address of pointer to string */
vtype_msgbody, /* as stringptr, but read when first required */
vtype_msgbody_end, /* ditto, the end of the message */
- vtype_msgheaders, /* the message's headers */
+ vtype_msgheaders, /* the message's headers, processed */
+ vtype_msgheaders_raw, /* the message's headers, unprocessed */
vtype_localpart, /* extract local part from string */
vtype_domain, /* extract domain from string */
vtype_recipients, /* extract recipients from recipients list */
/* This table must be kept in alphabetical order. */
static var_entry var_table[] = {
+ /* WARNING: Do not invent variables whose names start acl_c or acl_m because
+ they will be confused with user-creatable ACL variables. */
{ "acl_verify_message", vtype_stringptr, &acl_verify_message },
{ "address_data", vtype_stringptr, &deliver_address_data },
{ "address_file", vtype_stringptr, &address_file },
{ "message_body_size", vtype_int, &message_body_size },
{ "message_exim_id", vtype_stringptr, &message_id },
{ "message_headers", vtype_msgheaders, NULL },
+ { "message_headers_raw", vtype_msgheaders_raw, NULL },
{ "message_id", vtype_stringptr, &message_id },
{ "message_linecount", vtype_int, &message_linecount },
{ "message_size", vtype_int, &message_size },
newsize return the size of memory block that was obtained; may be NULL
if exists_only is TRUE
want_raw TRUE if called for $rh_ or $rheader_ variables; no processing,
- other than concatenating, will be done on the header
+ other than concatenating, will be done on the header. Also used
+ for $message_headers_raw.
charset name of charset to translate MIME words to; used only if
want_raw is false; if NULL, no translation is done (this is
used for $bh_ and $bheader_)
while (isspace(*t)) t++; /* remove leading white space */
ilen = h->slen - (t - h->text); /* length to insert */
+ /* Unless wanted raw, remove trailing whitespace, including the
+ newline. */
+
+ if (!want_raw)
+ while (ilen > 0 && isspace(t[ilen-1])) ilen--;
+
/* Set comma = 1 if handling a single header and it's one of those
that contains an address list, except when asked for raw headers. Only
need to do this once. */
/* First pass - compute total store needed; second pass - compute
total store used, including this header. */
- size += ilen + comma;
+ size += ilen + comma + 1; /* +1 for the newline */
/* Second pass - concatentate the data, up to a maximum. Note that
the loop stops when size hits the limit. */
{
if (size > header_insert_maxlen)
{
- ilen -= size - header_insert_maxlen;
+ ilen -= size - header_insert_maxlen - 1;
comma = 0;
}
Ustrncpy(ptr, t, ilen);
ptr += ilen;
- if (comma != 0 && ilen > 0)
+
+ /* For a non-raw header, put in the comma if needed, then add
+ back the newline we removed above, provided there was some text in
+ the header. */
+
+ if (!want_raw && ilen > 0)
{
- ptr[-1] = ',';
+ if (comma != 0) *ptr++ = ',';
*ptr++ = '\n';
}
}
}
}
- /* At end of first pass, truncate size if necessary, and get the buffer
- to hold the data, returning the buffer size. */
+ /* At end of first pass, return NULL if no header found. Then truncate size
+ if necessary, and get the buffer to hold the data, returning the buffer size.
+ */
if (i == 0)
{
}
}
-/* Remove a redundant added comma if present */
-
-if (comma != 0 && ptr > yield) ptr -= 2;
-
/* That's all we do for raw header expansion. */
if (want_raw)
*ptr = 0;
}
-/* Otherwise, we remove trailing whitespace, including newlines. Then we do RFC
-2047 decoding, translating the charset if requested. The rfc2047_decode2()
+/* Otherwise, remove a final newline and a redundant added comma. Then we do
+RFC 2047 decoding, translating the charset if requested. The rfc2047_decode2()
function can return an error with decoded data if the charset translation
fails. If decoding fails, it returns NULL. */
else
{
uschar *decoded, *error;
- while (ptr > yield && isspace(ptr[-1])) ptr--;
+ if (ptr > yield && ptr[-1] == '\n') ptr--;
+ if (ptr > yield && comma != 0 && ptr[-1] == ',') ptr--;
*ptr = 0;
decoded = rfc2047_decode2(yield, check_rfc2047_length, charset, '?', NULL,
newsize, &error);
int first = 0;
int last = var_table_size;
-/* Handle ACL variables, which are not in the table because their number may
-vary depending on a build-time setting. If the variable's name is not of the
-form acl_mddd or acl_cddd, where the d's are digits, fall through to look for
-other names that start with acl_. */
+/* Handle ACL variables, whose names are of the form acl_cxxx or acl_mxxx.
+Originally, xxx had to be a number in the range 0-9 (later 0-19), but from
+release 4.64 onwards arbitrary names are permitted, as long as the first 5
+characters are acl_c or acl_m and the sixth is either a digit or an underscore
+(this gave backwards compatibility at the changeover). There may be built-in
+variables whose names start acl_ but they should never start in this way. This
+slightly messy specification is a consequence of the history, needless to say.
-if (Ustrncmp(name, "acl_", 4) == 0)
- {
- uschar *endptr;
- int offset = -1;
- int max = 0;
+If an ACL variable does not exist, treat it as empty, unless strict_acl_vars is
+set, in which case give an error. */
- if (name[4] == 'm')
- {
- offset = ACL_CVARS;
- max = ACL_MVARS;
- }
- else if (name[4] == 'c')
- {
- offset = 0;
- max = ACL_CVARS;
- }
-
- if (offset >= 0)
- {
- int n = Ustrtoul(name + 5, &endptr, 10);
- if (*endptr == 0 && n < max)
- return (acl_var[offset + n] == NULL)? US"" : acl_var[offset + n];
- }
+if ((Ustrncmp(name, "acl_c", 5) == 0 || Ustrncmp(name, "acl_m", 5) == 0) &&
+ !isalpha(name[5]))
+ {
+ tree_node *node =
+ tree_search((name[4] == 'c')? acl_var_c : acl_var_m, name + 4);
+ return (node == NULL)? (strict_acl_vars? NULL : US"") : node->data.ptr;
}
-/* Similarly for $auth<n> variables. */
+/* Handle $auth<n> variables. */
if (Ustrncmp(name, "auth", 4) == 0)
{
case vtype_msgheaders:
return find_header(NULL, exists_only, newsize, FALSE, NULL);
+ case vtype_msgheaders_raw:
+ return find_header(NULL, exists_only, newsize, TRUE, NULL);
+
case vtype_msgbody: /* Pointer to msgbody string */
case vtype_msgbody_end: /* Ditto, the end of the msg */
ss = (uschar **)(var_table[middle].value);
+/*************************************************
+* Elaborate message for bad variable *
+*************************************************/
+
+/* For the "unknown variable" message, take a look at the variable's name, and
+give additional information about possible ACL variables. The extra information
+is added on to expand_string_message.
+
+Argument: the name of the variable
+Returns: nothing
+*/
+
+static void
+check_variable_error_message(uschar *name)
+{
+if (Ustrncmp(name, "acl_", 4) == 0)
+ expand_string_message = string_sprintf("%s (%s)", expand_string_message,
+ (name[4] == 'c' || name[4] == 'm')?
+ (isalpha(name[5])?
+ US"6th character of a user-defined ACL variable must be a digit or underscore" :
+ US"strict_acl_vars is set" /* Syntax is OK, it has to be this */
+ ) :
+ US"user-defined ACL variables must start acl_c or acl_m");
+}
+
+
+
/*************************************************
* Read and evaluate a condition *
*************************************************/
expand_string_message = (name[0] == 0)?
string_sprintf("variable name omitted after \"def:\"") :
string_sprintf("unknown variable \"%s\" after \"def:\"", name);
+ check_variable_error_message(name);
return NULL;
}
if (yield != NULL) *yield = (value[0] != 0) == testfor;
if (!isalpha(name[0]))
{
- uschar *endptr;
- num[i] = (int)Ustrtol((const uschar *)sub[i], &endptr, 10);
- if (tolower(*endptr) == 'k')
- {
- num[i] *= 1024;
- endptr++;
- }
- else if (tolower(*endptr) == 'm')
- {
- num[i] *= 1024*1024;
- endptr++;
- }
- while (isspace(*endptr)) endptr++;
- if (*endptr != 0)
- {
- expand_string_message = string_sprintf("\"%s\" is not a number",
- sub[i]);
- return NULL;
- }
+ num[i] = expand_string_integer(sub[i], FALSE);
+ if (expand_string_message != NULL) return NULL;
}
}
{
expand_string_message =
string_sprintf("unknown variable name \"%s\"", name);
+ check_variable_error_message(name);
goto EXPAND_FAILED;
}
}
else
{
shost.name = server_name;
- if (host_find_byname(&shost, NULL, NULL, FALSE) != HOST_FOUND)
+ if (host_find_byname(&shost, NULL, HOST_FIND_QUALIFY_SINGLE, NULL,
+ FALSE) != HOST_FOUND)
{
expand_string_message =
string_sprintf("no IP address found for host %s", shost.name);
{
expand_string_message =
string_sprintf("unknown variable in \"${%s}\"", name);
+ check_variable_error_message(name);
goto EXPAND_FAILED;
}
len = Ustrlen(value);
/* Expand a string, and convert the result into an integer.
-Argument: the string to be expanded
+Arguments:
+ string the string to be expanded
+ isplus TRUE if a non-negative number is expected
Returns: the integer value, or
-1 for an expansion error ) in both cases, message in
-2 for an integer interpretation error ) expand_string_message
-
+ expand_string_message is set NULL for an OK integer
*/
int
-expand_string_integer(uschar *string)
+expand_string_integer(uschar *string, BOOL isplus)
{
long int value;
uschar *s = expand_string(string);
uschar *msg = US"invalid integer \"%s\"";
uschar *endptr;
+/* If expansion failed, expand_string_message will be set. */
+
if (s == NULL) return -1;
/* On an overflow, strtol() returns LONG_MAX or LONG_MIN, and sets errno
systems, so we set it zero ourselves. */
errno = 0;
+expand_string_message = NULL; /* Indicates no error */
value = strtol(CS s, CSS &endptr, 0);
if (endptr == s)
{
msg = US"integer expected but \"%s\" found";
}
+else if (value < 0 && isplus)
+ {
+ msg = US"non-negative integer expected but \"%s\" found";
+ }
else
{
/* Ensure we can cast this down to an int */
projects / exim.git / blobdiff