* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) University of Cambridge 1995 - 2009 */
+/* Copyright (c) University of Cambridge 1995 - 2012 */
/* See the file NOTICE for conditions of use and distribution. */
/* Code for handling Access Control Lists (ACLs) */
#ifdef WITH_CONTENT_SCAN
ACLC_REGEX,
#endif
+ ACLC_REMOVE_HEADER,
ACLC_SENDER_DOMAINS,
ACLC_SENDERS,
ACLC_SET,
#ifdef WITH_CONTENT_SCAN
US"regex",
#endif
+ US"remove_header",
US"sender_domains", US"senders", US"set",
#ifdef WITH_CONTENT_SCAN
US"spam",
#ifndef DISABLE_DKIM
CONTROL_DKIM_VERIFY,
#endif
+ CONTROL_DSCP,
CONTROL_ERROR,
CONTROL_CASEFUL_LOCAL_PART,
CONTROL_CASELOWER_LOCAL_PART,
+ CONTROL_CUTTHROUGH_DELIVERY,
CONTROL_ENFORCE_SYNC,
CONTROL_NO_ENFORCE_SYNC,
CONTROL_FREEZE,
#ifndef DISABLE_DKIM
US"dkim_disable_verify",
#endif
+ US"dscp",
US"error",
US"caseful_local_part",
US"caselower_local_part",
+ US"cutthrough_delivery",
US"enforce_sync",
US"no_enforce_sync",
US"freeze",
checking functions. */
static uschar cond_expand_at_top[] = {
- TRUE, /* acl */
+ FALSE, /* acl */
TRUE, /* add_header */
FALSE, /* authenticated */
#ifdef EXPERIMENTAL_BRIGHTMAIL
#ifdef WITH_CONTENT_SCAN
TRUE, /* regex */
#endif
+ TRUE, /* remove_header */
FALSE, /* sender_domains */
FALSE, /* senders */
TRUE, /* set */
#ifdef WITH_CONTENT_SCAN
FALSE, /* regex */
#endif
+ TRUE, /* remove_header */
FALSE, /* sender_domains */
FALSE, /* senders */
TRUE, /* set */
(1<<ACL_WHERE_MIME)),
#endif
+ (unsigned int)
+ ~((1<<ACL_WHERE_MAIL)|(1<<ACL_WHERE_RCPT)| /* remove_header */
+ (1<<ACL_WHERE_PREDATA)|(1<<ACL_WHERE_DATA)|
+ (1<<ACL_WHERE_MIME)|(1<<ACL_WHERE_NOTSMTP)|
+ (1<<ACL_WHERE_NOTSMTP_START)),
+
(1<<ACL_WHERE_AUTH)|(1<<ACL_WHERE_CONNECT)| /* sender_domains */
(1<<ACL_WHERE_HELO)|
(1<<ACL_WHERE_MAILAUTH)|(1<<ACL_WHERE_QUIT)|
(1<<ACL_WHERE_NOTSMTP_START),
#endif
+ (1<<ACL_WHERE_NOTSMTP)|
+ (1<<ACL_WHERE_NOTSMTP_START)|
+ (1<<ACL_WHERE_NOTQUIT), /* dscp */
+
0, /* error */
(unsigned int)
(unsigned int)
~(1<<ACL_WHERE_RCPT), /* caselower_local_part */
+ (unsigned int)
+ 0, /* cutthrough_delivery */
+
(1<<ACL_WHERE_NOTSMTP)| /* enforce_sync */
(1<<ACL_WHERE_NOTSMTP_START),
#ifndef DISABLE_DKIM
{ US"dkim_disable_verify", CONTROL_DKIM_VERIFY, FALSE },
#endif
+ { US"dscp", CONTROL_DSCP, TRUE },
{ US"caseful_local_part", CONTROL_CASEFUL_LOCAL_PART, FALSE },
{ US"caselower_local_part", CONTROL_CASELOWER_LOCAL_PART, FALSE },
{ US"enforce_sync", CONTROL_ENFORCE_SYNC, FALSE },
{ US"fakedefer", CONTROL_FAKEDEFER, TRUE },
{ US"fakereject", CONTROL_FAKEREJECT, TRUE },
{ US"submission", CONTROL_SUBMISSION, TRUE },
- { US"suppress_local_fixups", CONTROL_SUPPRESS_LOCAL_FIXUPS, FALSE }
+ { US"suppress_local_fixups", CONTROL_SUPPRESS_LOCAL_FIXUPS, FALSE },
+ { US"cutthrough_delivery", CONTROL_CUTTHROUGH_DELIVERY, FALSE }
};
/* Support data structures for Client SMTP Authorization. acl_verify_csa()
/* Enable recursion between acl_check_internal() and acl_check_condition() */
-static int acl_check_internal(int, address_item *, uschar *, int, uschar **,
- uschar **);
+static int acl_check_wargs(int, address_item *, uschar *, int, uschar **,
+ uschar **);
/*************************************************
uschar *p, *q;
int hlen = Ustrlen(hstring);
-/* An empty string does nothing; otherwise add a final newline if necessary. */
+/* Ignore any leading newlines */
+while (*hstring == '\n') hstring++, hlen--;
+/* An empty string does nothing; ensure exactly one final newline. */
if (hlen <= 0) return;
-if (hstring[hlen-1] != '\n') hstring = string_sprintf("%s\n", hstring);
+if (hstring[--hlen] != '\n') hstring = string_sprintf("%s\n", hstring);
+else while(hstring[--hlen] == '\n') hstring[hlen+1] = '\0';
/* Loop for multiple header lines, taking care about continuations */
+/*************************************************
+* List the added header lines *
+*************************************************/
+uschar *
+fn_hdrs_added(void)
+{
+uschar * ret = NULL;
+header_line * h = acl_added_headers;
+uschar * s;
+uschar * cp;
+int size = 0;
+int ptr = 0;
+
+if (!h) return NULL;
+
+do
+ {
+ s = h->text;
+ while ((cp = Ustrchr(s, '\n')) != NULL)
+ {
+ if (cp[1] == '\0') break;
+
+ /* contains embedded newline; needs doubling */
+ ret = string_cat(ret, &size, &ptr, s, cp-s+1);
+ ret = string_cat(ret, &size, &ptr, US"\n", 1);
+ s = cp+1;
+ }
+ /* last bit of header */
+
+ ret = string_cat(ret, &size, &ptr, s, cp-s+1); /* newline-sep list */
+ }
+while((h = h->next));
+
+ret[ptr-1] = '\0'; /* overwrite last newline */
+return ret;
+}
+
+
+/*************************************************
+* Set up removed header line(s) *
+*************************************************/
+
+/* This function is called by the remove_header modifier. The argument is
+treated as a sequence of header names which are added to a colon separated
+list, provided there isn't an identical one already there.
+
+Argument: string of header names
+Returns: nothing
+*/
+
+static void
+setup_remove_header(uschar *hnames)
+{
+if (*hnames != 0)
+ {
+ if (acl_removed_headers == NULL)
+ acl_removed_headers = hnames;
+ else
+ acl_removed_headers = string_sprintf("%s : %s", acl_removed_headers, hnames);
+ }
+}
+
+
/*************************************************
* Handle warnings *
test whether it was successful or not. (This is for optional verification; for
mandatory verification, the connection doesn't last this long.) */
- if (tls_certificate_verified) return OK;
+ if (tls_in.certificate_verified) return OK;
*user_msgptr = US"no verified certificate";
return FAIL;
"discard" verb. */
case ACLC_ACL:
- rc = acl_check_internal(where, addr, arg, level+1, user_msgptr, log_msgptr);
- if (rc == DISCARD && verb != ACL_ACCEPT && verb != ACL_DISCARD)
- {
- *log_msgptr = string_sprintf("nested ACL returned \"discard\" for "
- "\"%s\" command (only allowed with \"accept\" or \"discard\")",
- verbs[verb]);
- return ERROR;
- }
+ rc = acl_check_wargs(where, addr, arg, level+1, user_msgptr, log_msgptr);
+ if (rc == DISCARD && verb != ACL_ACCEPT && verb != ACL_DISCARD)
+ {
+ *log_msgptr = string_sprintf("nested ACL returned \"discard\" for "
+ "\"%s\" command (only allowed with \"accept\" or \"discard\")",
+ verbs[verb]);
+ return ERROR;
+ }
break;
case ACLC_AUTHENTICATED:
break;
#endif
+ case CONTROL_DSCP:
+ if (*p == '/')
+ {
+ int fd, af, level, optname, value;
+ /* If we are acting on stdin, the setsockopt may fail if stdin is not
+ a socket; we can accept that, we'll just debug-log failures anyway. */
+ fd = fileno(smtp_in);
+ af = ip_get_address_family(fd);
+ if (af < 0)
+ {
+ HDEBUG(D_acl)
+ debug_printf("smtp input is probably not a socket [%s], not setting DSCP\n",
+ strerror(errno));
+ break;
+ }
+ if (dscp_lookup(p+1, af, &level, &optname, &value))
+ {
+ if (setsockopt(fd, level, optname, &value, sizeof(value)) < 0)
+ {
+ HDEBUG(D_acl) debug_printf("failed to set input DSCP[%s]: %s\n",
+ p+1, strerror(errno));
+ }
+ else
+ {
+ HDEBUG(D_acl) debug_printf("set input DSCP to \"%s\"\n", p+1);
+ }
+ }
+ else
+ {
+ *log_msgptr = string_sprintf("unrecognised DSCP value in \"control=%s\"", arg);
+ return ERROR;
+ }
+ }
+ else
+ {
+ *log_msgptr = string_sprintf("syntax error in \"control=%s\"", arg);
+ return ERROR;
+ }
+ break;
+
case CONTROL_ERROR:
return ERROR;
case CONTROL_SUPPRESS_LOCAL_FIXUPS:
suppress_local_fixups = TRUE;
break;
+
+ case CONTROL_CUTTHROUGH_DELIVERY:
+ if (deliver_freeze)
+ {
+ *log_msgptr = string_sprintf("\"control=%s\" on frozen item", arg);
+ return ERROR;
+ }
+ if (queue_only_policy)
+ {
+ *log_msgptr = string_sprintf("\"control=%s\" on queue-only item", arg);
+ return ERROR;
+ }
+ cutthrough_delivery = TRUE;
+ break;
}
break;
writing is poorly documented. */
case ACLC_ENCRYPTED:
- if (tls_cipher == NULL) rc = FAIL; else
+ if (tls_in.cipher == NULL) rc = FAIL; else
{
uschar *endcipher = NULL;
- uschar *cipher = Ustrchr(tls_cipher, ':');
- if (cipher == NULL) cipher = tls_cipher; else
+ uschar *cipher = Ustrchr(tls_in.cipher, ':');
+ if (cipher == NULL) cipher = tls_in.cipher; else
{
endcipher = Ustrchr(++cipher, ':');
if (endcipher != NULL) *endcipher = 0;
break;
#endif
+ case ACLC_REMOVE_HEADER:
+ setup_remove_header(arg);
+ break;
+
case ACLC_SENDER_DOMAINS:
{
uschar *sdomain;
}
+
+
+/* Same args as acl_check_internal() above, but the string s is
+the name of an ACL followed optionally by up to 9 space-separated arguments.
+The name and args are separately expanded. Args go into $acl_arg globals. */
+static int
+acl_check_wargs(int where, address_item *addr, uschar *s, int level,
+ uschar **user_msgptr, uschar **log_msgptr)
+{
+uschar * tmp;
+uschar * tmp_arg[9]; /* must match acl_arg[] */
+uschar * sav_arg[9]; /* must match acl_arg[] */
+int sav_narg;
+uschar * name;
+int i;
+int ret;
+
+if (!(tmp = string_dequote(&s)) || !(name = expand_string(tmp)))
+ goto bad;
+
+for (i = 0; i < 9; i++)
+ {
+ while (*s && isspace(*s)) s++;
+ if (!*s) break;
+ if (!(tmp = string_dequote(&s)) || !(tmp_arg[i] = expand_string(tmp)))
+ {
+ tmp = name;
+ goto bad;
+ }
+ }
+
+sav_narg = acl_narg;
+acl_narg = i;
+for (i = 0; i < acl_narg; i++)
+ {
+ sav_arg[i] = acl_arg[i];
+ acl_arg[i] = tmp_arg[i];
+ }
+while (i < 9)
+ {
+ sav_arg[i] = acl_arg[i];
+ acl_arg[i++] = NULL;
+ }
+
+ret = acl_check_internal(where, addr, name, level, user_msgptr, log_msgptr);
+
+acl_narg = sav_narg;
+for (i = 0; i < 9; i++) acl_arg[i] = sav_arg[i];
+return ret;
+
+bad:
+if (expand_string_forcedfail) return ERROR;
+*log_msgptr = string_sprintf("failed to expand ACL string \"%s\": %s",
+ tmp, expand_string_message);
+return search_find_defer?DEFER:ERROR;
+}
+
+
+
/*************************************************
* Check access using an ACL *
*************************************************/
+/* Alternate interface for ACL, used by expansions */
+int
+acl_eval(int where, uschar *recipient, uschar *s, uschar **user_msgptr,
+ uschar **log_msgptr)
+{
+int rc;
+address_item adb;
+address_item *addr = NULL;
+
+*user_msgptr = *log_msgptr = NULL;
+sender_verified_failed = NULL;
+ratelimiters_cmd = NULL;
+log_reject_target = LOG_MAIN|LOG_REJECT;
+
+if (where == ACL_WHERE_RCPT)
+ {
+ adb = address_defaults;
+ addr = &adb;
+ addr->address = recipient;
+ if (deliver_split_address(addr) == DEFER)
+ {
+ *log_msgptr = US"defer in percent_hack_domains check";
+ return DEFER;
+ }
+ deliver_domain = addr->domain;
+ deliver_localpart = addr->local_part;
+ }
+
+return acl_check_internal(where, addr, s, 0, user_msgptr, log_msgptr);
+}
+
+
+
/* This is the external interface for ACL checks. It sets up an address and the
expansions for $domain and $local_part when called after RCPT, then calls
acl_check_internal() to do the actual work.
DEFER can't tell at the moment
ERROR disaster
*/
+int acl_where = ACL_WHERE_UNKNOWN;
int
acl_check(int where, uschar *recipient, uschar *s, uschar **user_msgptr,
deliver_localpart = addr->local_part;
}
+acl_where = where;
rc = acl_check_internal(where, addr, s, 0, user_msgptr, log_msgptr);
+acl_where = ACL_WHERE_UNKNOWN;
+
+/* Cutthrough - if requested,
+and WHERE_RCPT and not yet opened conn as result of recipient-verify,
+and rcpt acl returned accept,
+and first recipient (cancel on any subsequents)
+open one now and run it up to RCPT acceptance.
+A failed verify should cancel cutthrough request.
+
+Initial implementation: dual-write to spool.
+Assume the rxd datastream is now being copied byte-for-byte to an open cutthrough connection.
+
+Cease cutthrough copy on rxd final dot; do not send one.
+
+On a data acl, if not accept and a cutthrough conn is open, hard-close it (no SMTP niceness).
+
+On data acl accept, terminate the dataphase on an open cutthrough conn. If accepted or
+perm-rejected, reflect that to the original sender - and dump the spooled copy.
+If temp-reject, close the conn (and keep the spooled copy).
+If conn-failure, no action (and keep the spooled copy).
+*/
+switch (where)
+{
+case ACL_WHERE_RCPT:
+ if( rcpt_count > 1 )
+ cancel_cutthrough_connection("more than one recipient");
+ else if (rc == OK && cutthrough_delivery && cutthrough_fd < 0)
+ open_cutthrough_connection(addr);
+ break;
+
+case ACL_WHERE_PREDATA:
+ if( rc == OK )
+ cutthrough_predata();
+ else
+ cancel_cutthrough_connection("predata acl not ok");
+ break;
+
+case ACL_WHERE_QUIT:
+case ACL_WHERE_NOTQUIT:
+ cancel_cutthrough_connection("quit or notquit");
+ break;
+
+default:
+ break;
+}
deliver_domain = deliver_localpart = deliver_address_data =
sender_address_data = NULL;
}
-
/*************************************************
* Create ACL variable *
*************************************************/
projects / exim.git / blobdiff