* Exim - an Internet mail transport agent *
*************************************************/
+/* Copyright (c) The Exim Maintainers 2020 - 2022 */
/* Copyright (c) University of Cambridge 1995 - 2018 */
/* See the file NOTICE for conditions of use and distribution. */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
/* Functions concerned with verifying things. The original code for callout
caching was contributed by Kevin Fleming (but I hacked it around a bit). */
uschar ctbuffer[8192];
-/* Structure for caching DNSBL lookups */
-
-typedef struct dnsbl_cache_block {
- time_t expiry;
- dns_address *rhs;
- uschar *text;
- int rc;
- BOOL text_set;
-} dnsbl_cache_block;
-
-
-/* Anchor for DNSBL cache */
-
-static tree_node *dnsbl_cache = NULL;
-
-
-/* Bits for match_type in one_check_dnsbl() */
-
-#define MT_NOT 1
-#define MT_ALL 2
-
static uschar cutthrough_response(client_conn_ctx *, char, uschar **, int);
if (!(cache_record = dbfn_read_with_length(dbm_file, key, &length)))
{
- HDEBUG(D_verify) debug_printf("callout cache: no %s record found for %s\n", type, key);
+ HDEBUG(D_verify) debug_printf_indent("callout cache: no %s record found for %s\n", type, key);
return NULL;
}
if (now - cache_record->time_stamp > expire)
{
- HDEBUG(D_verify) debug_printf("callout cache: %s record expired for %s\n", type, key);
+ HDEBUG(D_verify) debug_printf_indent("callout cache: %s record expired for %s\n", type, key);
return NULL;
}
{
if (length == sizeof(dbdata_callout_cache_obs))
{
- dbdata_callout_cache *new = store_get(sizeof(dbdata_callout_cache));
+ dbdata_callout_cache * new = store_get(sizeof(dbdata_callout_cache), GET_UNTAINTED);
memcpy(new, cache_record, length);
new->postmaster_stamp = new->random_stamp = new->time_stamp;
cache_record = new;
cache_record->random_result = ccache_unknown;
}
-HDEBUG(D_verify) debug_printf("callout cache: found %s record for %s\n", type, key);
+HDEBUG(D_verify) debug_printf_indent("callout cache: found %s record for %s\n", type, key);
return cache_record;
}
open_db dbblock;
open_db *dbm_file = NULL;
-/* Open the callout cache database, it it exists, for reading only at this
+/* Open the callout cache database, if it exists, for reading only at this
stage, unless caching has been disabled. */
if (options & vopt_callout_no_cache)
{
- HDEBUG(D_verify) debug_printf("callout cache: disabled by no_cache\n");
+ HDEBUG(D_verify) debug_printf_indent("callout cache: disabled by no_cache\n");
}
-else if (!(dbm_file = dbfn_open(US"callout", O_RDWR, &dbblock, FALSE)))
+else if (!(dbm_file = dbfn_open(US"callout", O_RDWR, &dbblock, FALSE, TRUE)))
{
- HDEBUG(D_verify) debug_printf("callout cache: not available\n");
+ HDEBUG(D_verify) debug_printf_indent("callout cache: not available\n");
}
else
{
|| *from_address == 0 && cache_record->result == ccache_reject_mfnull)
{
HDEBUG(D_verify)
- debug_printf("callout cache: domain gave initial rejection, or "
+ debug_printf_indent("callout cache: domain gave initial rejection, or "
"does not accept HELO or MAIL FROM:<>\n");
setflag(addr, af_verify_nsfail);
addr->user_message = US"(result of an earlier callout reused).";
{
case ccache_accept:
HDEBUG(D_verify)
- debug_printf("callout cache: domain accepts random addresses\n");
+ debug_printf_indent("callout cache: domain accepts random addresses\n");
*failure_ptr = US"random";
dbfn_close(dbm_file);
return TRUE; /* Default yield is OK */
case ccache_reject:
HDEBUG(D_verify)
- debug_printf("callout cache: domain rejects random addresses\n");
+ debug_printf_indent("callout cache: domain rejects random addresses\n");
*opt_ptr = options & ~vopt_callout_random;
new_domain_record->random_result = ccache_reject;
new_domain_record->random_stamp = cache_record->random_stamp;
default:
HDEBUG(D_verify)
- debug_printf("callout cache: need to check random address handling "
+ debug_printf_indent("callout cache: need to check random address handling "
"(not cached or cache expired)\n");
dbfn_close(dbm_file);
return FALSE;
{
setflag(addr, af_verify_pmfail);
HDEBUG(D_verify)
- debug_printf("callout cache: domain does not accept "
+ debug_printf_indent("callout cache: domain does not accept "
"RCPT TO:<postmaster@domain>\n");
*yield = FAIL;
*failure_ptr = US"postmaster";
if (cache_record->postmaster_result == ccache_unknown)
{
HDEBUG(D_verify)
- debug_printf("callout cache: need to check RCPT "
+ debug_printf_indent("callout cache: need to check RCPT "
"TO:<postmaster@domain> (not cached or cache expired)\n");
dbfn_close(dbm_file);
return FALSE;
that the value in the cache record is preserved (with its old timestamp).
*/
- HDEBUG(D_verify) debug_printf("callout cache: domain accepts RCPT "
+ HDEBUG(D_verify) debug_printf_indent("callout cache: domain accepts RCPT "
"TO:<postmaster@domain>\n");
*pm_ptr = NULL;
new_domain_record->postmaster_result = ccache_accept;
if (cache_address_record->result == ccache_accept)
{
HDEBUG(D_verify)
- debug_printf("callout cache: address record is positive\n");
+ debug_printf_indent("callout cache: address record is positive\n");
}
else
{
HDEBUG(D_verify)
- debug_printf("callout cache: address record is negative\n");
+ debug_printf_indent("callout cache: address record is negative\n");
addr->user_message = US"Previous (cached) callout verification failure";
*failure_ptr = US"recipient";
*yield = FAIL;
Otherwise the value is ccache_accept, ccache_reject, or ccache_reject_mfnull. */
if (dom_rec->result != ccache_unknown)
- if (!(dbm_file = dbfn_open(US"callout", O_RDWR|O_CREAT, &dbblock, FALSE)))
+ if (!(dbm_file = dbfn_open(US"callout", O_RDWR|O_CREAT, &dbblock, FALSE, TRUE)))
{
- HDEBUG(D_verify) debug_printf("callout cache: not available\n");
+ HDEBUG(D_verify) debug_printf_indent("callout cache: not available\n");
}
else
{
(void)dbfn_write(dbm_file, domain, dom_rec,
(int)sizeof(dbdata_callout_cache));
- HDEBUG(D_verify) debug_printf("wrote callout cache domain record for %s:\n"
+ HDEBUG(D_verify) debug_printf_indent("wrote callout cache domain record for %s:\n"
" result=%d postmaster=%d random=%d\n",
domain,
dom_rec->result,
if (done && addr_rec->result != ccache_unknown)
{
if (!dbm_file)
- dbm_file = dbfn_open(US"callout", O_RDWR|O_CREAT, &dbblock, FALSE);
+ dbm_file = dbfn_open(US"callout", O_RDWR|O_CREAT, &dbblock, FALSE, TRUE);
if (!dbm_file)
{
- HDEBUG(D_verify) debug_printf("no callout cache available\n");
+ HDEBUG(D_verify) debug_printf_indent("no callout cache available\n");
}
else
{
(void)dbfn_write(dbm_file, address_key, addr_rec,
(int)sizeof(dbdata_callout_cache_address));
- HDEBUG(D_verify) debug_printf("wrote %s callout cache address record for %s\n",
+ HDEBUG(D_verify) debug_printf_indent("wrote %s callout cache address record for %s\n",
addr_rec->result == ccache_accept ? "positive" : "negative",
address_key);
}
if (done)
{
- address_item * na = store_get(sizeof(address_item));
+ address_item * na = store_get(sizeof(address_item), GET_UNTAINTED);
*na = cutthrough.addr;
cutthrough.addr = *addr;
cutthrough.addr.host_used = &cutthrough.host;
}
+
+
+/* A rcpt callout, or cached record of one, verified the address.
+Set $domain_data and $local_part_data to detainted versions.
+*/
+static void
+callout_verified_rcpt(const address_item * addr)
+{
+address_item a = {.address = addr->address};
+if (deliver_split_address(&a) != OK) return;
+deliver_localpart_data = string_copy_taint(a.local_part, GET_UNTAINTED);
+deliver_domain_data = string_copy_taint(a.domain, GET_UNTAINTED);
+}
+
+
/*************************************************
* Do callout verification for an address *
*************************************************/
{
HDEBUG(D_verify) debug_printf("cannot callout via null transport\n");
}
+
else if (Ustrcmp(addr->transport->driver_name, "smtp") != 0)
log_write(0, LOG_MAIN|LOG_PANIC|LOG_CONFIG_FOR, "callout transport '%s': %s is non-smtp",
addr->transport->name, addr->transport->driver_name);
{
smtp_transport_options_block *ob =
(smtp_transport_options_block *)addr->transport->options_block;
+ smtp_context * sx = NULL;
/* The information wasn't available in the cache, so we have to do a real
callout and save the result in the cache for next time, unless no_cache is set,
log_write(0, LOG_MAIN|LOG_PANIC, "failed to expand "
"callout_random_local_part: %s", expand_string_message);
+ /* Compile regex' used by client-side smtp */
+
+ smtp_deliver_init();
+
/* Default the connect and overall callout timeouts if not set, and record the
time we are starting so that we can enforce it. */
{
int host_af;
int port = 25;
- uschar *interface = NULL; /* Outgoing interface to use; NULL => any */
- smtp_context sx;
+ uschar * interface = NULL; /* Outgoing interface to use; NULL => any */
if (!host->address)
{
log_write(0, LOG_MAIN|LOG_PANIC, "<%s>: %s", addr->address,
addr->message);
- sx.addrlist = addr;
- sx.conn_args.host = host;
- sx.conn_args.host_af = host_af,
- sx.port = port;
- sx.conn_args.interface = interface;
- sx.helo_data = tf->helo_data;
- sx.conn_args.tblock = addr->transport;
- sx.verify = TRUE;
+ if (!sx) sx = store_get(sizeof(*sx), GET_TAINTED); /* tainted buffers */
+ memset(sx, 0, sizeof(*sx));
+
+ sx->addrlist = sx->first_addr = addr;
+ sx->conn_args.host = host;
+ sx->conn_args.host_af = host_af,
+ sx->port = port;
+ sx->conn_args.interface = interface;
+ sx->helo_data = tf->helo_data;
+ sx->conn_args.tblock = addr->transport;
+ sx->conn_args.sock = -1;
+ sx->verify = TRUE;
tls_retry_connection:
/* Set the address state so that errors are recorded in it */
SMTP command to send. If we tried TLS but it failed, try again without
if permitted */
- yield = smtp_setup_conn(&sx, FALSE);
-#ifdef SUPPORT_TLS
+ yield = smtp_setup_conn(sx, FALSE);
+#ifndef DISABLE_TLS
if ( yield == DEFER
&& addr->basic_errno == ERRNO_TLSFAILURE
&& ob->tls_tempfail_tryclear
"%s: callout unencrypted to %s [%s] (not in hosts_require_tls)",
addr->message, host->name, host->address);
addr->transport_return = PENDING_DEFER;
- yield = smtp_setup_conn(&sx, TRUE);
+ yield = smtp_setup_conn(sx, TRUE);
}
#endif
if (yield != OK)
addr->authenticator = client_authenticator;
addr->auth_id = client_authenticated_id;
- sx.from_addr = from_address;
- sx.first_addr = sx.sync_addr = addr;
- sx.ok = FALSE; /*XXX these 3 last might not be needed for verify? */
- sx.send_rset = TRUE;
- sx.completed_addr = FALSE;
+ sx->from_addr = from_address;
+ sx->first_addr = sx->sync_addr = addr;
+ sx->ok = FALSE; /*XXX these 3 last might not be needed for verify? */
+ sx->send_rset = TRUE;
+ sx->completed_addr = FALSE;
new_domain_record.result = old_domain_cache_result == ccache_reject_mfnull
? ccache_reject_mfnull : ccache_accept;
Avoid using a SIZE option on the MAIL for all random-rcpt checks.
*/
- sx.avoid_option = OPTION_SIZE;
+ sx->avoid_option = OPTION_SIZE;
/* Remember when we last did a random test */
new_domain_record.random_stamp = time(NULL);
- if (smtp_write_mail_and_rcpt_cmds(&sx, &yield) == 0)
+ if (smtp_write_mail_and_rcpt_cmds(sx, &yield) == 0)
switch(addr->transport_return)
{
case PENDING_OK: /* random was accepted, unfortunately */
goto no_conn;
case FAIL: /* rejected: the preferred result */
new_domain_record.random_result = ccache_reject;
- sx.avoid_option = 0;
+ sx->avoid_option = 0;
/* Between each check, issue RSET, because some servers accept only
one recipient after MAIL FROM:<>.
XXX We don't care about that for postmaster_full. Should we? */
if ((done =
- smtp_write_command(&sx, SCMD_FLUSH, "RSET\r\n") >= 0 &&
- smtp_read_response(&sx, sx.buffer, sizeof(sx.buffer), '2', callout)))
+ smtp_write_command(sx, SCMD_FLUSH, "RSET\r\n") >= 0 &&
+ smtp_read_response(sx, sx->buffer, sizeof(sx->buffer), '2', callout)))
break;
HDEBUG(D_acl|D_v)
debug_printf_indent("problem after random/rset/mfrom; reopen conn\n");
random_local_part = NULL;
-#ifdef SUPPORT_TLS
- tls_close(sx.cctx.tls_ctx, TLS_SHUTDOWN_NOWAIT);
+#ifndef DISABLE_TLS
+ tls_close(sx->cctx.tls_ctx, TLS_SHUTDOWN_NOWAIT);
#endif
HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP(close)>>\n");
- (void)close(sx.cctx.sock);
- sx.cctx.sock = -1;
+ (void)close(sx->cctx.sock);
+ sx->cctx.sock = -1;
#ifndef DISABLE_EVENT
(void) event_raise(addr->transport->event_action,
- US"tcp:close", NULL);
+ US"tcp:close", NULL, NULL);
#endif
addr->address = main_address;
addr->transport_return = PENDING_DEFER;
- sx.first_addr = sx.sync_addr = addr;
- sx.ok = FALSE;
- sx.send_rset = TRUE;
- sx.completed_addr = FALSE;
+ sx->first_addr = sx->sync_addr = addr;
+ sx->ok = FALSE;
+ sx->send_rset = TRUE;
+ sx->completed_addr = FALSE;
goto tls_retry_connection;
case DEFER: /* 4xx response to random */
break; /* Just to be clear. ccache_unknown, !done. */
/* Re-setup for main verify, or for the error message when failing */
addr->address = main_address;
addr->transport_return = PENDING_DEFER;
- sx.first_addr = sx.sync_addr = addr;
- sx.ok = FALSE;
- sx.send_rset = TRUE;
- sx.completed_addr = FALSE;
+ sx->first_addr = sx->sync_addr = addr;
+ sx->ok = FALSE;
+ sx->send_rset = TRUE;
+ sx->completed_addr = FALSE;
}
else
done = TRUE;
if (done)
{
if (!(options & vopt_is_recipient && options & vopt_callout_no_cache))
- sx.avoid_option = OPTION_SIZE;
+ sx->avoid_option = OPTION_SIZE;
done = FALSE;
- switch(smtp_write_mail_and_rcpt_cmds(&sx, &yield))
+ switch(smtp_write_mail_and_rcpt_cmds(sx, &yield))
{
case 0: switch(addr->transport_return) /* ok so far */
{
case PENDING_OK: done = TRUE;
new_address_record.result = ccache_accept;
break;
- case FAIL: done = TRUE;
+ case FAIL: done = TRUE;
yield = FAIL;
*failure_ptr = US"recipient";
new_address_record.result = ccache_reject;
break;
- default: break;
+ default: break;
}
break;
case -1: /* MAIL response error */
*failure_ptr = US"mail";
- if (errno == 0 && sx.buffer[0] == '5')
+ if (errno == 0 && sx->buffer[0] == '5')
{
setflag(addr, af_verify_nsfail);
if (from_address[0] == 0)
cancel_cutthrough_connection(TRUE, US"postmaster verify");
HDEBUG(D_acl|D_v) debug_printf_indent("Cutthrough cancelled by presence of postmaster verify\n");
- done = smtp_write_command(&sx, SCMD_FLUSH, "RSET\r\n") >= 0
- && smtp_read_response(&sx, sx.buffer, sizeof(sx.buffer), '2', callout);
+ done = smtp_write_command(sx, SCMD_FLUSH, "RSET\r\n") >= 0
+ && smtp_read_response(sx, sx->buffer, sizeof(sx->buffer), '2', callout);
if (done)
{
addr->address = string_sprintf("postmaster@%.1000s", addr->domain);
addr->transport_return = PENDING_DEFER;
- sx.from_addr = pm_mailfrom;
- sx.first_addr = sx.sync_addr = addr;
- sx.ok = FALSE;
- sx.send_rset = TRUE;
- sx.completed_addr = FALSE;
- sx.avoid_option = OPTION_SIZE;
+ sx->from_addr = pm_mailfrom;
+ sx->first_addr = sx->sync_addr = addr;
+ sx->ok = FALSE;
+ sx->send_rset = TRUE;
+ sx->completed_addr = FALSE;
+ sx->avoid_option = OPTION_SIZE;
- if( smtp_write_mail_and_rcpt_cmds(&sx, &yield) == 0
+ if( smtp_write_mail_and_rcpt_cmds(sx, &yield) == 0
&& addr->transport_return == PENDING_OK
)
done = TRUE;
else
done = (options & vopt_callout_fullpm) != 0
- && smtp_write_command(&sx, SCMD_FLUSH,
+ && smtp_write_command(sx, SCMD_FLUSH,
"RCPT TO:<postmaster>\r\n") >= 0
- && smtp_read_response(&sx, sx.buffer,
- sizeof(sx.buffer), '2', callout);
+ && smtp_read_response(sx, sx->buffer,
+ sizeof(sx->buffer), '2', callout);
/* Sort out the cache record */
if (done)
new_domain_record.postmaster_result = ccache_accept;
- else if (errno == 0 && sx.buffer[0] == '5')
+ else if (errno == 0 && sx->buffer[0] == '5')
{
*failure_ptr = US"postmaster";
setflag(addr, af_verify_pmfail);
{
case ETIMEDOUT:
HDEBUG(D_verify) debug_printf("SMTP timeout\n");
- sx.send_quit = FALSE;
+ sx->send_quit = FALSE;
break;
#ifdef SUPPORT_I18N
{
extern int acl_where; /* src/acl.c */
errno = 0;
- addr->message = string_sprintf(
- "response to \"EHLO\" did not include SMTPUTF8");
+ addr->message = US"response to \"EHLO\" did not include SMTPUTF8";
addr->user_message = acl_where == ACL_WHERE_RCPT
? US"533 no support for internationalised mailbox name"
: US"550 mailbox unavailable";
done = TRUE;
}
break;
-#endif
-#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_REQUIRETLS)
- case ERRNO_REQUIRETLS:
- addr->user_message = US"530 5.7.4 REQUIRETLS support required";
- yield = FAIL;
- done = TRUE;
- break;
#endif
case ECONNREFUSED:
- sx.send_quit = FALSE;
+ sx->send_quit = FALSE;
break;
case 0:
- if (*sx.buffer == 0) Ustrcpy(sx.buffer, US"connection dropped");
+ if (*sx->buffer == 0) Ustrcpy(sx->buffer, US"connection dropped");
/*XXX test here is ugly; seem to have a split of responsibility for
building this message. Need to rationalise. Where is it done
*/
if (!addr->message) addr->message =
string_sprintf("response to \"%s\" was: %s",
- big_buffer, string_printing(sx.buffer));
+ big_buffer, string_printing(sx->buffer));
+ /* RFC 5321 section 4.2: the text portion of the response may have only
+ HT, SP, Printable US-ASCII. Deal with awkward chars by cutting the
+ received message off before passing it onward. Newlines are ok; they
+ just become a multiline response (but wrapped in the error code we
+ produce). */
+
+ for (uschar * s = sx->buffer;
+ *s && s < sx->buffer + sizeof(sx->buffer);
+ s++)
+ {
+ uschar c = *s;
+ if (c != '\t' && c != '\n' && (c < ' ' || c > '~'))
+ {
+ if (s - sx->buffer < sizeof(sx->buffer) - 12)
+ memcpy(s, "(truncated)", 12);
+ else
+ *s = '\0';
+ break;
+ }
+ }
addr->user_message = options & vopt_is_recipient
- ? string_sprintf("Callout verification failed:\n%s", sx.buffer)
+ ? string_sprintf("Callout verification failed:\n%s", sx->buffer)
: string_sprintf("Called: %s\nSent: %s\nResponse: %s",
- host->address, big_buffer, sx.buffer);
+ host->address, big_buffer, sx->buffer);
/* Hard rejection ends the process */
- if (sx.buffer[0] == '5') /* Address rejected */
+ if (sx->buffer[0] == '5') /* Address rejected */
{
yield = FAIL;
done = TRUE;
HDEBUG(D_acl|D_v) debug_printf("Cutthrough cancelled by presence of transport filter\n");
}
#ifndef DISABLE_DKIM
+ /* DKIM signing needs to add a header after seeing the whole body, so we cannot just copy
+ body bytes to the outbound as they are received, which is the intent of cutthrough. */
if (ob->dkim.dkim_domain)
{
cutthrough.delivery= FALSE;
&& !random_local_part
&& !pm_mailfrom
&& cutthrough.cctx.sock < 0
- && !sx.lmtp
+ && !sx->lmtp
)
{
HDEBUG(D_acl|D_v) debug_printf_indent("holding verify callout open for %s\n",
cutthrough.callout_hold_only = !cutthrough.delivery;
cutthrough.is_tls = tls_out.active.sock >= 0;
/* We assume no buffer in use in the outblock */
- cutthrough.cctx = sx.cctx;
+ cutthrough.cctx = sx->cctx;
cutthrough.nrcpt = 1;
cutthrough.transport = addr->transport->name;
cutthrough.interface = interface;
for (address_item * caddr = &cutthrough.addr, * parent = addr->parent;
parent;
caddr = caddr->parent, parent = parent->parent)
- *(caddr->parent = store_get(sizeof(address_item))) = *parent;
+ *(caddr->parent = store_get(sizeof(address_item), GET_UNTAINTED)) = *parent;
ctctx.outblock.buffer = ctbuffer;
ctctx.outblock.buffersize = sizeof(ctbuffer);
/* Ensure no cutthrough on multiple verifies that were incompatible */
if (options & vopt_callout_recipsender)
cancel_cutthrough_connection(TRUE, US"not usable for cutthrough");
- if (sx.send_quit)
- {
- (void) smtp_write_command(&sx, SCMD_FLUSH, "QUIT\r\n");
+ if (sx->send_quit)
+ if (smtp_write_command(sx, SCMD_FLUSH, "QUIT\r\n") != -1)
+ /* Wait a short time for response, and discard it */
+ smtp_read_response(sx, sx->buffer, sizeof(sx->buffer), '2', 1);
- /* Wait a short time for response, and discard it */
- smtp_read_response(&sx, sx.buffer, sizeof(sx.buffer), '2', 1);
- }
-
- if (sx.cctx.sock >= 0)
+ if (sx->cctx.sock >= 0)
{
-#ifdef SUPPORT_TLS
- if (sx.cctx.tls_ctx)
+#ifndef DISABLE_TLS
+ if (sx->cctx.tls_ctx)
{
- tls_close(sx.cctx.tls_ctx, TLS_SHUTDOWN_NOWAIT);
- sx.cctx.tls_ctx = NULL;
+ tls_close(sx->cctx.tls_ctx, TLS_SHUTDOWN_NOWAIT);
+ sx->cctx.tls_ctx = NULL;
}
#endif
HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP(close)>>\n");
- (void)close(sx.cctx.sock);
- sx.cctx.sock = -1;
+ (void)close(sx->cctx.sock);
+ sx->cctx.sock = -1;
+ smtp_debug_cmd_report();
#ifndef DISABLE_EVENT
- (void) event_raise(addr->transport->event_action, US"tcp:close", NULL);
+ (void) event_raise(addr->transport->event_action, US"tcp:close", NULL, NULL);
#endif
}
}
/* Come here from within the cache-reading code on fast-track exit. */
END_CALLOUT:
-tls_modify_variables(&tls_in);
+tls_modify_variables(&tls_in); /* return variables to inbound values */
return yield;
}
return TRUE;
if(
-#ifdef SUPPORT_TLS
+#ifndef DISABLE_TLS
cutthrough.is_tls
? tls_write(cutthrough.cctx.tls_ctx, ctctx.outblock.buffer, n, FALSE)
:
if(cutthrough.cctx.sock < 0 || cutthrough.callout_hold_only)
return FALSE;
-HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP>> DATA\n");
+smtp_debug_cmd(US"DATA", 0);
cutthrough_puts(US"DATA\r\n", 6);
cutthrough_flush_send();
*/
client_conn_ctx tmp_ctx = cutthrough.cctx;
ctctx.outblock.ptr = ctbuffer;
- HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP>> QUIT\n");
+ smtp_debug_cmd(US"QUIT", 0);
_cutthrough_puts(US"QUIT\r\n", 6); /* avoid recursion */
_cutthrough_flush_send();
cutthrough.cctx.sock = -1; /* avoid recursion via read timeout */
/* Wait a short time for response, and discard it */
cutthrough_response(&tmp_ctx, '2', NULL, 1);
-#ifdef SUPPORT_TLS
+#ifndef DISABLE_TLS
if (cutthrough.is_tls)
{
tls_close(cutthrough.cctx.tls_ctx, TLS_SHUTDOWN_NOWAIT);
#endif
HDEBUG(D_transport|D_acl|D_v) debug_printf_indent(" SMTP(close)>>\n");
(void)close(fd);
+ smtp_debug_cmd_report();
HDEBUG(D_acl) debug_printf_indent("----------- cutthrough shutdown (%s) ------------\n", why);
}
ctctx.outblock.ptr = ctbuffer;
vaddr->basic_errno = addr->basic_errno;
vaddr->more_errno = addr->more_errno;
vaddr->prop.address_data = addr->prop.address_data;
+ vaddr->prop.variables = NULL;
+ tree_dup((tree_node **)&vaddr->prop.variables, addr->prop.variables);
copyflag(vaddr, addr, af_pass_message);
}
return yield;
Arguments:
vaddr contains the address to verify; the next field in this block
must be NULL
- f if not NULL, write the result to this file
+ fp if not NULL, write the result to this file
options various option bits:
vopt_fake_sender => this sender verify is not for the real
sender (it was verify=sender=xxxx or an address from a
BOOL success_on_redirect = (options & vopt_success_on_redirect) != 0;
int i;
int yield = OK;
-int verify_type = expn? v_expn :
- f.address_test_mode? v_none :
- options & vopt_is_recipient? v_recipient : v_sender;
+int verify_type = expn ? v_expn :
+ f.address_test_mode ? v_none :
+ options & vopt_is_recipient ? v_recipient : v_sender;
address_item *addr_list;
address_item *addr_new = NULL;
address_item *addr_remote = NULL;
*failure_ptr = US"qualify";
return FAIL;
}
- address = rewrite_address_qualify(address, options & vopt_is_recipient);
+ /* deconst ok as address was not const */
+ address = US rewrite_address_qualify(address, options & vopt_is_recipient);
}
DEBUG(D_verify)
if (global_rewrite_rules)
{
uschar *old = address;
- address = rewrite_address(address, options & vopt_is_recipient, FALSE,
+ /* deconst ok as address was not const */
+ address = US rewrite_address(address, options & vopt_is_recipient, FALSE,
global_rewrite_rules, rewrite_existflags);
if (address != old)
{
if (rc == OK)
{
+ BOOL local_verify = FALSE;
+
if (routed) *routed = TRUE;
if (callout > 0)
{
transport's options, so as to mimic what would happen if we were really
sending a message to this address. */
- if ((tp = addr->transport) && !tp->info->local)
- {
- (void)(tp->setup)(tp, addr, &tf, 0, 0, NULL);
+ if ((tp = addr->transport))
+ if (!tp->info->local)
+ {
+ (void)(tp->setup)(tp, addr, &tf, 0, 0, NULL);
- /* If the transport has hosts and the router does not, or if the
- transport is configured to override the router's hosts, we must build a
- host list of the transport's hosts, and find the IP addresses */
+ /* If the transport has hosts and the router does not, or if the
+ transport is configured to override the router's hosts, we must build a
+ host list of the transport's hosts, and find the IP addresses */
- if (tf.hosts && (!host_list || tf.hosts_override))
- {
- uschar *s;
- const uschar *save_deliver_domain = deliver_domain;
- uschar *save_deliver_localpart = deliver_localpart;
-
- host_list = NULL; /* Ignore the router's hosts */
-
- deliver_domain = addr->domain;
- deliver_localpart = addr->local_part;
- s = expand_string(tf.hosts);
- deliver_domain = save_deliver_domain;
- deliver_localpart = save_deliver_localpart;
-
- if (!s)
- {
- log_write(0, LOG_MAIN|LOG_PANIC, "failed to expand list of hosts "
- "\"%s\" in %s transport for callout: %s", tf.hosts,
- tp->name, expand_string_message);
- }
- else
- {
- int flags;
- host_build_hostlist(&host_list, s, tf.hosts_randomize);
-
- /* Just ignore failures to find a host address. If we don't manage
- to find any addresses, the callout will defer. Note that more than
- one address may be found for a single host, which will result in
- additional host items being inserted into the chain. Hence we must
- save the next host first. */
-
- flags = HOST_FIND_BY_A | HOST_FIND_BY_AAAA;
- if (tf.qualify_single) flags |= HOST_FIND_QUALIFY_SINGLE;
- if (tf.search_parents) flags |= HOST_FIND_SEARCH_PARENTS;
-
- for (host_item * host = host_list, * nexthost; host; host = nexthost)
- {
- nexthost = host->next;
- if (tf.gethostbyname ||
- string_is_ip_address(host->name, NULL) != 0)
- (void)host_find_byname(host, NULL, flags, NULL, TRUE);
- else
+ if (tf.hosts && (!host_list || tf.hosts_override))
+ {
+ uschar *s;
+ const uschar *save_deliver_domain = deliver_domain;
+ uschar *save_deliver_localpart = deliver_localpart;
+
+ host_list = NULL; /* Ignore the router's hosts */
+
+ deliver_domain = addr->domain;
+ deliver_localpart = addr->local_part;
+ s = expand_string(tf.hosts);
+ deliver_domain = save_deliver_domain;
+ deliver_localpart = save_deliver_localpart;
+
+ if (!s)
+ {
+ log_write(0, LOG_MAIN|LOG_PANIC, "failed to expand list of hosts "
+ "\"%s\" in %s transport for callout: %s", tf.hosts,
+ tp->name, expand_string_message);
+ }
+ else
+ {
+ int flags;
+ host_build_hostlist(&host_list, s, tf.hosts_randomize);
+
+ /* Just ignore failures to find a host address. If we don't manage
+ to find any addresses, the callout will defer. Note that more than
+ one address may be found for a single host, which will result in
+ additional host items being inserted into the chain. Hence we must
+ save the next host first. */
+
+ flags = HOST_FIND_BY_A | HOST_FIND_BY_AAAA;
+ if (tf.qualify_single) flags |= HOST_FIND_QUALIFY_SINGLE;
+ if (tf.search_parents) flags |= HOST_FIND_SEARCH_PARENTS;
+
+ for (host_item * host = host_list, * nexthost; host; host = nexthost)
{
- const dnssec_domains * dsp = NULL;
- if (Ustrcmp(tp->driver_name, "smtp") == 0)
+ nexthost = host->next;
+ if (tf.gethostbyname ||
+ string_is_ip_address(host->name, NULL) != 0)
+ (void)host_find_byname(host, NULL, flags, NULL, TRUE);
+ else
{
- smtp_transport_options_block * ob =
- (smtp_transport_options_block *) tp->options_block;
- dsp = &ob->dnssec;
- }
+ const dnssec_domains * dsp = NULL;
+ if (Ustrcmp(tp->driver_name, "smtp") == 0)
+ {
+ smtp_transport_options_block * ob =
+ (smtp_transport_options_block *) tp->options_block;
+ dsp = &ob->dnssec;
+ }
- (void) host_find_bydns(host, NULL, flags, NULL, NULL, NULL,
- dsp, NULL, NULL);
+ (void) host_find_bydns(host, NULL, flags, NULL, NULL, NULL,
+ dsp, NULL, NULL);
+ }
}
- }
- }
- }
- }
+ }
+ }
+ }
+ else if ( options & vopt_quota
+ && Ustrcmp(tp->driver_name, "appendfile") == 0)
+ local_verify = TRUE;
/* Can only do a callout if we have at least one host! If the callout
fails, it will have set ${sender,recipient}_verify_failure. */
}
else
{
-#ifdef SUPPORT_TLS
+#ifndef DISABLE_TLS
deliver_set_expansions(addr);
#endif
rc = do_callout(addr, host_list, &tf, callout, callout_overall,
callout_connect, options, se_mailfrom, pm_mailfrom);
-#ifdef SUPPORT_TLS
+#ifndef DISABLE_TLS
deliver_set_expansions(NULL);
#endif
+ if ( options & vopt_is_recipient
+ && rc == OK
+ /* set to "random", with OK, for an accepted random */
+ && !recipient_verify_failure
+ )
+ callout_verified_rcpt(addr);
}
}
+ else if (local_verify)
+ {
+ HDEBUG(D_verify) debug_printf("Attempting quota verification\n");
+
+ deliver_set_expansions(addr);
+ deliver_local(addr, TRUE);
+ rc = addr->transport_return;
+ }
else
- {
HDEBUG(D_verify) debug_printf("Cannot do callout: neither router nor "
"transport provided a host list, or transport is not smtp\n");
- }
}
}
of $address_data to be that of the child */
vaddr->prop.address_data = addr->prop.address_data;
+ vaddr->prop.variables = NULL;
+ tree_dup((tree_node **)&vaddr->prop.variables, addr->prop.variables);
/* If stopped because more than one new address, cannot cutthrough */
addr_list = addr->next;
fprintf(fp, "%s", CS addr->address);
-#ifdef EXPERIMENTAL_SRS
- if(addr->prop.srs_sender)
- fprintf(fp, " [srs = %s]", addr->prop.srs_sender);
-#endif
/* If the address is a duplicate, show something about it. */
out:
verify_mode = NULL;
-tls_modify_variables(&tls_in);
+tls_modify_variables(&tls_in); /* return variables to inbound values */
return yield;
}
colon = Ustrchr(h->text, ':');
s = colon + 1;
- while (isspace(*s)) s++;
+ Uskip_whitespace(&s);
/* Loop for multiple addresses in the header, enabling group syntax. Note
that we have to reset this after the header has been scanned. */
{
if (!f.allow_unqualified_recipient) recipient = NULL;
}
- if (recipient == NULL) errmess = US"unqualified address not permitted";
+ if (!recipient) errmess = US"unqualified address not permitted";
}
/* It's an error if no address could be extracted, except for the special
/* Advance to the next address */
s = ss + (terminator ? 1 : 0);
- while (isspace(*s)) s++;
+ Uskip_whitespace(&s);
} /* Next address */
f.parse_allow_group = FALSE;
if ((*s < 33) || (*s > 126))
{
*msgptr = string_sprintf("Invalid character in header \"%.*s\" found",
- colon - h->text, h->text);
+ (int)(colon - h->text), h->text);
return FAIL;
}
}
because (a) it requires no memory and (b) will use fewer resources when there
are many addresses in To: and/or Cc: and only one or two envelope recipients.
-Arguments: none
+Arguments: case_sensitive true if case sensitive matching should be used
Returns: OK if there are no blind recipients
FAIL if there is at least one blind recipient
*/
int
-verify_check_notblind(void)
+verify_check_notblind(BOOL case_sensitive)
{
for (int i = 0; i < recipients_count; i++)
{
colon = Ustrchr(h->text, ':');
s = colon + 1;
- while (isspace(*s)) s++;
+ Uskip_whitespace(&s);
/* Loop for multiple addresses in the header, enabling group syntax. Note
that we have to reset this after the header has been scanned. */
while (*s)
{
- uschar *ss = parse_find_address_end(s, FALSE);
- uschar *recipient,*errmess;
+ uschar * ss = parse_find_address_end(s, FALSE);
+ uschar * recipient, * errmess;
int terminator = *ss;
int start, end, domain;
*ss = terminator;
/* If we found a valid recipient that has a domain, compare it with the
- envelope recipient. Local parts are compared case-sensitively, domains
- case-insensitively. By comparing from the start with length "domain", we
- include the "@" at the end, which ensures that we are comparing the whole
- local part of each address. */
-
- if (recipient != NULL && domain != 0)
- {
- found = Ustrncmp(recipient, address, domain) == 0 &&
- strcmpic(recipient + domain, address + domain) == 0;
- if (found) break;
- }
+ envelope recipient. Local parts are compared with case-sensitivity
+ according to the routine arg, domains case-insensitively.
+ By comparing from the start with length "domain", we include the "@" at
+ the end, which ensures that we are comparing the whole local part of each
+ address. */
+
+ if (recipient && domain != 0)
+ if ((found = (case_sensitive
+ ? Ustrncmp(recipient, address, domain) == 0
+ : strncmpic(recipient, address, domain) == 0)
+ && strcmpic(recipient + domain, address + domain) == 0))
+ break;
/* Advance to the next address */
- s = ss + (terminator? 1:0);
- while (isspace(*s)) s++;
+ s = ss + (terminator ? 1:0);
+ Uskip_whitespace(&s);
} /* Next address */
f.parse_allow_group = FALSE;
/* If we found an empty address, just carry on with the next one, but
kill the message. */
- if (address == NULL && Ustrcmp(*log_msgptr, "empty address") == 0)
+ if (!address && Ustrcmp(*log_msgptr, "empty address") == 0)
{
*log_msgptr = NULL;
s = ss;
function, and ensure that the failing address gets added to the error
message. */
- if (address == NULL)
+ if (!address)
{
new_ok = FAIL;
while (ss > s && isspace(ss[-1])) ss--;
int size = sizeof(buffer) - (p - buffer);
if (size <= 0) goto END_OFF; /* Buffer filled without seeing \n. */
- count = ip_recv(&ident_conn_ctx, p, size, rfc1413_query_timeout);
+ count = ip_recv(&ident_conn_ctx, p, size, time(NULL) + rfc1413_query_timeout);
if (count <= 0) goto END_OFF; /* Read error or EOF */
/* Scan what we just read, to see if we have reached the terminating \r\n. Be
*/
int
-check_host(void *arg, const uschar *ss, const uschar **valueptr, uschar **error)
+check_host(void * arg, const uschar * ss, const uschar ** valueptr, uschar ** error)
{
-check_host_block *cb = (check_host_block *)arg;
+check_host_block * cb = (check_host_block *)arg;
int mlen = -1;
int maskoffset;
-BOOL iplookup = FALSE;
-BOOL isquery = FALSE;
-BOOL isiponly = cb->host_name != NULL && cb->host_name[0] == 0;
-const uschar *t;
-uschar *semicolon;
-uschar **aliases;
+BOOL iplookup = FALSE, isquery = FALSE;
+BOOL isiponly = cb->host_name && !cb->host_name[0];
+const uschar * t;
+uschar * semicolon, * endname, * opts;
+uschar ** aliases;
/* Optimize for the special case when the pattern is "*". */
-if (*ss == '*' && ss[1] == 0) return OK;
+if (*ss == '*' && !ss[1]) return OK;
/* If the pattern is empty, it matches only in the case when there is no host -
this can occur in ACL checking for SMTP input using the -bs option. In this
situation, the host address is the empty string. */
-if (cb->host_address[0] == 0) return (*ss == 0)? OK : FAIL;
-if (*ss == 0) return FAIL;
+if (!cb->host_address[0]) return *ss ? FAIL : OK;
+if (!*ss) return FAIL;
/* If the pattern is precisely "@" then match against the primary host name,
provided that host name matching is permitted; if it's "@[]" match against the
local host's IP addresses. */
if (*ss == '@')
- {
if (ss[1] == 0)
{
if (isiponly) return ERROR;
if (Ustrcmp(ip->address, cb->host_address) == 0) return OK;
return FAIL;
}
- }
/* If the pattern is an IP address, optionally followed by a bitmask count, do
a (possibly masked) comparison with the current IP address. */
dots). */
for (t = ss; isdigit(*t) || *t == '.'; ) t++;
-if (*t == 0 || (*t == '/' && t != ss))
+if (!*t || (*t == '/' && t != ss))
{
*error = US"malformed IPv4 address or address mask";
return ERROR;
}
-/* See if there is a semicolon in the pattern */
+/* See if there is a semicolon in the pattern, separating a searchtype
+prefix. If there is one then check for comma-sep options. */
-semicolon = Ustrchr(ss, ';');
+if ((semicolon = Ustrchr(ss, ';')))
+ if ((opts = Ustrchr(ss, ',')) && opts < semicolon)
+ {
+ endname = opts++;
+ opts = string_copyn(opts, semicolon - opts);
+ }
+ else
+ {
+ endname = semicolon;
+ opts = NULL;
+ }
/* If we are doing an IP address only match, then all lookups must be IP
address lookups, even if there is no "net-". */
if (isiponly)
- {
iplookup = semicolon != NULL;
- }
/* Otherwise, if the item is of the form net[n]-lookup;<file|query> then it is
a lookup on a masked IP network, in textual form. We obey this code even if we
From release 4.30, the use of net- for query style is no longer needed, but we
retain it for backward compatibility. */
-if (Ustrncmp(ss, "net", 3) == 0 && semicolon != NULL)
+if (Ustrncmp(ss, "net", 3) == 0 && semicolon)
{
mlen = 0;
for (t = ss + 3; isdigit(*t); t++) mlen = mlen * 10 + *t - '0';
if (mlen == 0 && t == ss+3) mlen = -1; /* No mask supplied */
- iplookup = (*t++ == '-');
+ iplookup = *t++ == '-';
}
else
t = ss;
/* Find the search type */
- search_type = search_findtype(t, semicolon - t);
+ search_type = search_findtype(t, endname - t);
if (search_type < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
search_error_message);
if (!(handle = search_open(filename, search_type, 0, NULL, NULL)))
log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", search_error_message);
- result = search_find(handle, filename, key, -1, NULL, 0, 0, NULL);
+ result = search_find(handle, filename, key, -1, NULL, 0, 0, NULL, opts);
if (valueptr) *valueptr = result;
return result ? OK : f.search_find_defer ? DEFER: FAIL;
}
underscores, as they are all too commonly found. Sigh. Also, if
allow_utf8_domains is set, allow top-bit characters. */
-for (t = ss; *t != 0; t++)
+for (t = ss; *t; t++)
if (!isalnum(*t) && *t != '.' && *t != '-' && *t != '_' &&
(!allow_utf8_domains || *t < 128)) break;
its IP address and match against that. Note that a multi-homed host will add
items to the chain. */
-if (*t == 0)
+if (!*t)
{
int rc;
host_item h;
outgoing hosts, the name is always given explicitly. If it is NULL, it means we
must use sender_host_name and its aliases, looking them up if necessary. */
-if (cb->host_name != NULL) /* Explicit host name given */
- return match_check_string(cb->host_name, ss, -1, TRUE, TRUE, TRUE,
- valueptr);
+if (cb->host_name) /* Explicit host name given */
+ return match_check_string(cb->host_name, ss, -1,
+ MCS_PARTIAL | MCS_CASELESS | MCS_AT_SPECIAL | cb->flags, valueptr);
/* Host name not given; in principle we need the sender host name and its
aliases. However, for query-style lookups, we do not need the name if the
$sender_host_name causes it to be looked up, so we don't need to do the lookup
on spec. */
-if ((semicolon = Ustrchr(ss, ';')) != NULL)
+if ((semicolon = Ustrchr(ss, ';')))
{
- const uschar *affix;
+ const uschar * affix, * opts;
int partial, affixlen, starflags, id;
*semicolon = 0;
- id = search_findtype_partial(ss, &partial, &affix, &affixlen, &starflags);
+ id = search_findtype_partial(ss, &partial, &affix, &affixlen, &starflags,
+ &opts);
*semicolon=';';
if (id < 0) /* Unknown lookup type */
if (isquery)
{
- switch(match_check_string(US"", ss, -1, TRUE, TRUE, TRUE, valueptr))
+ switch(match_check_string(US"", ss, -1,
+ MCS_PARTIAL| MCS_CASELESS| MCS_AT_SPECIAL | (cb->flags & MCS_CACHEABLE),
+ valueptr))
{
case OK: return OK;
case DEFER: return DEFER;
/* Match on the sender host name, using the general matching function */
-switch(match_check_string(sender_host_name, ss, -1, TRUE, TRUE, TRUE, valueptr))
+switch(match_check_string(sender_host_name, ss, -1,
+ MCS_PARTIAL| MCS_CASELESS| MCS_AT_SPECIAL | (cb->flags & MCS_CACHEABLE),
+ valueptr))
{
case OK: return OK;
case DEFER: return DEFER;
aliases = sender_host_aliases;
while (*aliases)
- switch(match_check_string(*aliases++, ss, -1, TRUE, TRUE, TRUE, valueptr))
+ switch(match_check_string(*aliases++, ss, -1,
+ MCS_PARTIAL| MCS_CASELESS| MCS_AT_SPECIAL | (cb->flags & MCS_CACHEABLE),
+ valueptr))
{
case OK: return OK;
case DEFER: return DEFER;
check_host, /* function for testing */
&cb, /* argument for function */
MCL_HOST, /* type of check */
- (host_address == sender_host_address)?
- US"host" : host_address, /* text for debugging */
+ host_address == sender_host_address
+ ? US"host" : host_address, /* text for debugging */
valueptr); /* where to pass back data */
deliver_host_address = save_host_address;
return rc;
verify_check_host(uschar **listptr)
{
return verify_check_this_host(CUSS listptr, sender_host_cache, NULL,
- (sender_host_address == NULL)? US"" : sender_host_address, NULL);
+ sender_host_address ? sender_host_address : US"", NULL);
}
-/*************************************************
-* Perform a single dnsbl lookup *
-*************************************************/
+/****************************************************
+ Verify a local user account for quota sufficiency
+****************************************************/
-/* This function is called from verify_check_dnsbl() below. It is also called
-recursively from within itself when domain and domain_txt are different
-pointers, in order to get the TXT record from the alternate domain.
+/* The real work, done via a re-exec for privs, calls
+down to the transport for the quota check.
-Arguments:
- domain the outer dnsbl domain
- domain_txt alternate domain to lookup TXT record on success; when the
- same domain is to be used, domain_txt == domain (that is,
- the pointers must be identical, not just the text)
- keydomain the current keydomain (for debug message)
- prepend subdomain to lookup (like keydomain, but
- reversed if IP address)
- iplist the list of matching IP addresses, or NULL for "any"
- bitmask true if bitmask matching is wanted
- match_type condition for 'succeed' result
- 0 => Any RR in iplist (=)
- 1 => No RR in iplist (!=)
- 2 => All RRs in iplist (==)
- 3 => Some RRs not in iplist (!==)
- the two bits are defined as MT_NOT and MT_ALL
- defer_return what to return for a defer
-
-Returns: OK if lookup succeeded
- FAIL if not
-*/
+Route and transport (in recipient-verify mode) the
+given recipient.
-static int
-one_check_dnsbl(uschar *domain, uschar *domain_txt, uschar *keydomain,
- uschar *prepend, uschar *iplist, BOOL bitmask, int match_type,
- int defer_return)
-{
-dns_answer dnsa;
-dns_scan dnss;
-tree_node *t;
-dnsbl_cache_block *cb;
-int old_pool = store_pool;
-uschar query[256]; /* DNS domain max length */
-
-/* Construct the specific query domainname */
-
-if (!string_format(query, sizeof(query), "%s.%s", prepend, domain))
- {
- log_write(0, LOG_MAIN|LOG_PANIC, "dnslist query is too long "
- "(ignored): %s...", query);
- return FAIL;
- }
-
-/* Look for this query in the cache. */
-
-if ( (t = tree_search(dnsbl_cache, query))
- && (cb = t->data.ptr)->expiry > time(NULL)
- )
-
-/* Previous lookup was cached */
+A routing result indicating any transport type other than appendfile
+results in a fail.
- {
- HDEBUG(D_dnsbl) debug_printf("using result of previous DNS lookup\n");
- }
+Return, on stdout, a result string containing:
+- highlevel result code (OK, DEFER, FAIL)
+- errno
+- where string
+- message string
+*/
-/* If not cached from a previous lookup, we must do a DNS lookup, and
-cache the result in permanent memory. */
+void
+verify_quota(uschar * address)
+{
+address_item vaddr = {.address = address};
+BOOL routed;
+uschar * msg = US"\0";
+int rc, len = 1;
-else
+if ((rc = verify_address(&vaddr, NULL, vopt_is_recipient | vopt_quota,
+ 1, 0, 0, NULL, NULL, &routed)) != OK)
{
- uint ttl = 3600;
-
- store_pool = POOL_PERM;
-
- if (t)
+ uschar * where = recipient_verify_failure;
+ msg = acl_verify_message ? acl_verify_message : vaddr.message;
+ if (!msg) msg = US"";
+ if (rc == DEFER && vaddr.basic_errno == ERRNO_EXIMQUOTA)
{
- HDEBUG(D_dnsbl) debug_printf("cached data found but past valid time; ");
+ rc = FAIL; /* DEFER -> FAIL */
+ where = US"quota";
+ vaddr.basic_errno = 0;
}
+ else if (!where) where = US"";
- else
- { /* Set up a tree entry to cache the lookup */
- t = store_get(sizeof(tree_node) + Ustrlen(query));
- Ustrcpy(t->name, query);
- t->data.ptr = cb = store_get(sizeof(dnsbl_cache_block));
- (void)tree_insertnode(&dnsbl_cache, t);
- }
-
- /* Do the DNS lookup . */
-
- HDEBUG(D_dnsbl) debug_printf("new DNS lookup for %s\n", query);
- cb->rc = dns_basic_lookup(&dnsa, query, T_A);
- cb->text_set = FALSE;
- cb->text = NULL;
- cb->rhs = NULL;
-
- /* If the lookup succeeded, cache the RHS address. The code allows for
- more than one address - this was for complete generality and the possible
- use of A6 records. However, A6 records are no longer supported. Leave the code
- here, just in case.
-
- Quite apart from one A6 RR generating multiple addresses, there are DNS
- lists that return more than one A record, so we must handle multiple
- addresses generated in that way as well.
-
- Mark the cache entry with the "now" plus the minimum of the address TTLs,
- or some suitably far-future time if none were found. */
-
- if (cb->rc == DNS_SUCCEED)
- {
- dns_address ** addrp = &(cb->rhs);
- for (dns_record * rr = dns_next_rr(&dnsa, &dnss, RESET_ANSWERS); rr;
- rr = dns_next_rr(&dnsa, &dnss, RESET_NEXT))
- if (rr->type == T_A)
- {
- dns_address *da = dns_address_from_rr(&dnsa, rr);
- if (da)
- {
- *addrp = da;
- while (da->next) da = da->next;
- addrp = &da->next;
- if (ttl > rr->ttl) ttl = rr->ttl;
- }
- }
-
- /* If we didn't find any A records, change the return code. This can
- happen when there is a CNAME record but there are no A records for what
- it points to. */
-
- if (!cb->rhs) cb->rc = DNS_NODATA;
- }
-
- cb->expiry = time(NULL)+ttl;
- store_pool = old_pool;
+ len = 5 + Ustrlen(msg) + 1 + Ustrlen(where);
+ msg = string_sprintf("%c%c%c%c%c%s%c%s", (uschar)rc,
+ (vaddr.basic_errno >> 24) & 0xff, (vaddr.basic_errno >> 16) & 0xff,
+ (vaddr.basic_errno >> 8) & 0xff, vaddr.basic_errno & 0xff,
+ where, '\0', msg);
}
-/* We now have the result of the DNS lookup, either newly done, or cached
-from a previous call. If the lookup succeeded, check against the address
-list if there is one. This may be a positive equality list (introduced by
-"="), a negative equality list (introduced by "!="), a positive bitmask
-list (introduced by "&"), or a negative bitmask list (introduced by "!&").*/
-
-if (cb->rc == DNS_SUCCEED)
- {
- dns_address *da = NULL;
- uschar *addlist = cb->rhs->address;
-
- /* For A and AAAA records, there may be multiple addresses from multiple
- records. For A6 records (currently not expected to be used) there may be
- multiple addresses from a single record. */
-
- for (da = cb->rhs->next; da; da = da->next)
- addlist = string_sprintf("%s, %s", addlist, da->address);
-
- HDEBUG(D_dnsbl) debug_printf("DNS lookup for %s succeeded (yielding %s)\n",
- query, addlist);
-
- /* Address list check; this can be either for equality, or via a bitmask.
- In the latter case, all the bits must match. */
-
- if (iplist)
- {
- for (da = cb->rhs; da; da = da->next)
- {
- int ipsep = ',';
- uschar ip[46];
- const uschar *ptr = iplist;
- uschar *res;
-
- /* Handle exact matching */
-
- if (!bitmask)
- {
- while ((res = string_nextinlist(&ptr, &ipsep, ip, sizeof(ip))))
- if (Ustrcmp(CS da->address, ip) == 0)
- break;
- }
-
- /* Handle bitmask matching */
-
- else
- {
- int address[4];
- int mask = 0;
-
- /* At present, all known DNS blocking lists use A records, with
- IPv4 addresses on the RHS encoding the information they return. I
- wonder if this will linger on as the last vestige of IPv4 when IPv6
- is ubiquitous? Anyway, for now we use paranoia code to completely
- ignore IPv6 addresses. The default mask is 0, which always matches.
- We change this only for IPv4 addresses in the list. */
-
- if (host_aton(da->address, address) == 1) mask = address[0];
-
- /* Scan the returned addresses, skipping any that are IPv6 */
-
- while ((res = string_nextinlist(&ptr, &ipsep, ip, sizeof(ip))))
- {
- if (host_aton(ip, address) != 1) continue;
- if ((address[0] & mask) == address[0]) break;
- }
- }
-
- /* If either
-
- (a) An IP address in an any ('=') list matched, or
- (b) No IP address in an all ('==') list matched
-
- then we're done searching. */
-
- if (((match_type & MT_ALL) != 0) == (res == NULL)) break;
- }
-
- /* If da == NULL, either
-
- (a) No IP address in an any ('=') list matched, or
- (b) An IP address in an all ('==') list didn't match
-
- so behave as if the DNSBL lookup had not succeeded, i.e. the host is not on
- the list. */
-
- if ((match_type == MT_NOT || match_type == MT_ALL) != (da == NULL))
- {
- HDEBUG(D_dnsbl)
- {
- uschar *res = NULL;
- switch(match_type)
- {
- case 0:
- res = US"was no match"; break;
- case MT_NOT:
- res = US"was an exclude match"; break;
- case MT_ALL:
- res = US"was an IP address that did not match"; break;
- case MT_NOT|MT_ALL:
- res = US"were no IP addresses that did not match"; break;
- }
- debug_printf("=> but we are not accepting this block class because\n");
- debug_printf("=> there %s for %s%c%s\n",
- res,
- ((match_type & MT_ALL) == 0)? "" : "=",
- bitmask? '&' : '=', iplist);
- }
- return FAIL;
- }
- }
-
- /* Either there was no IP list, or the record matched, implying that the
- domain is on the list. We now want to find a corresponding TXT record. If an
- alternate domain is specified for the TXT record, call this function
- recursively to look that up; this has the side effect of re-checking that
- there is indeed an A record at the alternate domain. */
+DEBUG(D_verify) debug_printf_indent("verify_quota: len %d\n", len);
+write(1, msg, len);
+return;
+}
- if (domain_txt != domain)
- return one_check_dnsbl(domain_txt, domain_txt, keydomain, prepend, NULL,
- FALSE, match_type, defer_return);
- /* If there is no alternate domain, look up a TXT record in the main domain
- if it has not previously been cached. */
+/******************************************************************************/
- if (!cb->text_set)
- {
- cb->text_set = TRUE;
- if (dns_basic_lookup(&dnsa, query, T_TXT) == DNS_SUCCEED)
- for (dns_record * rr = dns_next_rr(&dnsa, &dnss, RESET_ANSWERS); rr;
- rr = dns_next_rr(&dnsa, &dnss, RESET_NEXT))
- if (rr->type == T_TXT)
- {
- int len = (rr->data)[0];
- if (len > 511) len = 127;
- store_pool = POOL_PERM;
- cb->text = string_sprintf("%.*s", len, CUS (rr->data+1));
- store_pool = old_pool;
- break;
- }
- }
-
- dnslist_value = addlist;
- dnslist_text = cb->text;
- return OK;
- }
+/* Quota cache lookup. We use the callout hints db also for the quota cache.
+Return TRUE if a nonexpired record was found, having filled in the yield
+argument.
+*/
-/* There was a problem with the DNS lookup */
+static BOOL
+cached_quota_lookup(const uschar * rcpt, int * yield,
+ int pos_cache, int neg_cache)
+{
+open_db dbblock, *dbm_file = NULL;
+dbdata_callout_cache_address * cache_address_record;
-if (cb->rc != DNS_NOMATCH && cb->rc != DNS_NODATA)
+if (!pos_cache && !neg_cache)
+ return FALSE;
+if (!(dbm_file = dbfn_open(US"callout", O_RDWR, &dbblock, FALSE, TRUE)))
{
- log_write(L_dnslist_defer, LOG_MAIN,
- "DNS list lookup defer (probably timeout) for %s: %s", query,
- (defer_return == OK)? US"assumed in list" :
- (defer_return == FAIL)? US"assumed not in list" :
- US"returned DEFER");
- return defer_return;
+ HDEBUG(D_verify) debug_printf_indent("quota cache: not available\n");
+ return FALSE;
}
-
-/* No entry was found in the DNS; continue for next domain */
-
-HDEBUG(D_dnsbl)
+if (!(cache_address_record = (dbdata_callout_cache_address *)
+ get_callout_cache_record(dbm_file, rcpt, US"address",
+ pos_cache, neg_cache)))
{
- debug_printf("DNS lookup for %s failed\n", query);
- debug_printf("=> that means %s is not listed at %s\n",
- keydomain, domain);
+ dbfn_close(dbm_file);
+ return FALSE;
}
-
-return FAIL;
+if (cache_address_record->result == ccache_accept)
+ *yield = OK;
+dbfn_close(dbm_file);
+return TRUE;
}
+/* Quota cache write */
+static void
+cache_quota_write(const uschar * rcpt, int yield, int pos_cache, int neg_cache)
+{
+open_db dbblock, *dbm_file = NULL;
+dbdata_callout_cache_address cache_address_record;
+if (!pos_cache && !neg_cache)
+ return;
+if (!(dbm_file = dbfn_open(US"callout", O_RDWR|O_CREAT, &dbblock, FALSE, TRUE)))
+ {
+ HDEBUG(D_verify) debug_printf_indent("quota cache: not available\n");
+ return;
+ }
-/*************************************************
-* Check host against DNS black lists *
-*************************************************/
-
-/* This function runs checks against a list of DNS black lists, until one
-matches. Each item on the list can be of the form
-
- domain=ip-address/key
-
-The domain is the right-most domain that is used for the query, for example,
-blackholes.mail-abuse.org. If the IP address is present, there is a match only
-if the DNS lookup returns a matching IP address. Several addresses may be
-given, comma-separated, for example: x.y.z=127.0.0.1,127.0.0.2.
-
-If no key is given, what is looked up in the domain is the inverted IP address
-of the current client host. If a key is given, it is used to construct the
-domain for the lookup. For example:
-
- dsn.rfc-ignorant.org/$sender_address_domain
-
-After finding a match in the DNS, the domain is placed in $dnslist_domain, and
-then we check for a TXT record for an error message, and if found, save its
-value in $dnslist_text. We also cache everything in a tree, to optimize
-multiple lookups.
+cache_address_record.result = yield == OK ? ccache_accept : ccache_reject;
-The TXT record is normally looked up in the same domain as the A record, but
-when many lists are combined in a single DNS domain, this will not be a very
-specific message. It is possible to specify a different domain for looking up
-TXT records; this is given before the main domain, comma-separated. For
-example:
+(void)dbfn_write(dbm_file, rcpt, &cache_address_record,
+ (int)sizeof(dbdata_callout_cache_address));
+HDEBUG(D_verify) debug_printf_indent("wrote %s quota cache record for %s\n",
+ yield == OK ? "positive" : "negative", rcpt);
- dnslists = http.dnsbl.sorbs.net,dnsbl.sorbs.net=127.0.0.2 : \
- socks.dnsbl.sorbs.net,dnsbl.sorbs.net=127.0.0.3
+dbfn_close(dbm_file);
+return;
+}
-The caching ensures that only one lookup in dnsbl.sorbs.net is done.
-Note: an address for testing RBL is 192.203.178.39
-Note: an address for testing DUL is 192.203.178.4
-Note: a domain for testing RFCI is example.tld.dsn.rfc-ignorant.org
+/* To evaluate a local user's quota, starting in ACL, we need to
+fork & exec to regain privileges, to that we can change to the user's
+identity for access to their files.
Arguments:
- where the acl type
- listptr the domain/address/data list
- log_msgptr log message on error
-
-Returns: OK successful lookup (i.e. the address is on the list), or
- lookup deferred after +include_unknown
- FAIL name not found, or no data found for the given type, or
- lookup deferred after +exclude_unknown (default)
- DEFER lookup failure, if +defer_unknown was set
+ rcpt Recipient account
+ pos_cache Number of seconds to cache a positive result (delivery
+ to be accepted). Zero to disable caching.
+ neg_cache Number of seconds to cache a negative result. Zero to disable.
+ msg Pointer to result string pointer
+
+Return: OK/DEFER/FAIL code
*/
int
-verify_check_dnsbl(int where, const uschar ** listptr, uschar ** log_msgptr)
+verify_quota_call(const uschar * rcpt, int pos_cache, int neg_cache,
+ uschar ** msg)
{
-int sep = 0;
-int defer_return = FAIL;
-const uschar *list = *listptr;
-uschar *domain;
-uschar buffer[1024];
-uschar revadd[128]; /* Long enough for IPv6 address */
-
-/* Indicate that the inverted IP address is not yet set up */
-
-revadd[0] = 0;
-
-/* In case this is the first time the DNS resolver is being used. */
-
-dns_init(FALSE, FALSE, FALSE); /*XXX dnssec? */
+int pfd[2], pid, save_errno, yield = FAIL;
+void (*oldsignal)(int);
+const uschar * where = US"socketpair";
-/* Loop through all the domains supplied, until something matches */
+*msg = NULL;
-while ((domain = string_nextinlist(&list, &sep, buffer, sizeof(buffer))) != NULL)
+if (cached_quota_lookup(rcpt, &yield, pos_cache, neg_cache))
{
- int rc;
- BOOL bitmask = FALSE;
- int match_type = 0;
- uschar *domain_txt;
- uschar *comma;
- uschar *iplist;
- uschar *key;
-
- HDEBUG(D_dnsbl) debug_printf("DNS list check: %s\n", domain);
-
- /* Deal with special values that change the behaviour on defer */
-
- if (domain[0] == '+')
- {
- if (strcmpic(domain, US"+include_unknown") == 0) defer_return = OK;
- else if (strcmpic(domain, US"+exclude_unknown") == 0) defer_return = FAIL;
- else if (strcmpic(domain, US"+defer_unknown") == 0) defer_return = DEFER;
- else
- log_write(0, LOG_MAIN|LOG_PANIC, "unknown item in dnslist (ignored): %s",
- domain);
- continue;
- }
-
- /* See if there's explicit data to be looked up */
-
- if ((key = Ustrchr(domain, '/'))) *key++ = 0;
-
- /* See if there's a list of addresses supplied after the domain name. This is
- introduced by an = or a & character; if preceded by = we require all matches
- and if preceded by ! we invert the result. */
-
- if (!(iplist = Ustrchr(domain, '=')))
+ HDEBUG(D_verify) debug_printf_indent("quota cache: address record is %s\n",
+ yield == OK ? "positive" : "negative");
+ if (yield != OK)
{
- bitmask = TRUE;
- iplist = Ustrchr(domain, '&');
+ recipient_verify_failure = US"quota";
+ acl_verify_message = *msg =
+ US"Previous (cached) quota verification failure";
}
+ return yield;
+ }
- if (iplist) /* Found either = or & */
- {
- if (iplist > domain && iplist[-1] == '!') /* Handle preceding ! */
- {
- match_type |= MT_NOT;
- iplist[-1] = 0;
- }
-
- *iplist++ = 0; /* Terminate domain, move on */
+if (pipe(pfd) != 0)
+ goto fail;
- /* If we found = (bitmask == FALSE), check for == or =& */
+where = US"fork";
+oldsignal = signal(SIGCHLD, SIG_DFL);
+if ((pid = exim_fork(US"quota-verify")) < 0)
+ {
+ save_errno = errno;
+ close(pfd[pipe_write]);
+ close(pfd[pipe_read]);
+ errno = save_errno;
+ goto fail;
+ }
- if (!bitmask && (*iplist == '=' || *iplist == '&'))
- {
- bitmask = *iplist++ == '&';
- match_type |= MT_ALL;
- }
- }
+if (pid == 0) /* child */
+ {
+ close(pfd[pipe_read]);
+ force_fd(pfd[pipe_write], 1); /* stdout to pipe */
+ close(pfd[pipe_write]);
+ dup2(1, 0);
+ if (debug_fd > 0) force_fd(debug_fd, 2);
+
+ child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 3,
+ US"-MCq", string_sprintf("%d", message_size), rcpt);
+ /*NOTREACHED*/
+ }
+save_errno = errno;
+close(pfd[pipe_write]);
- /* If there is a comma in the domain, it indicates that a second domain for
- looking up TXT records is provided, before the main domain. Otherwise we must
- set domain_txt == domain. */
+if (pid < 0)
+ {
+ DEBUG(D_verify) debug_printf_indent(" fork: %s\n", strerror(save_errno));
+ }
+else
+ {
+ uschar buf[128];
+ int n = read(pfd[pipe_read], buf, sizeof(buf));
+ int status;
- domain_txt = domain;
- comma = Ustrchr(domain, ',');
- if (comma != NULL)
+ waitpid(pid, &status, 0);
+ if (status == 0)
{
- *comma++ = 0;
- domain = comma;
- }
-
- /* Check that what we have left is a sensible domain name. There is no reason
- why these domains should in fact use the same syntax as hosts and email
- domains, but in practice they seem to. However, there is little point in
- actually causing an error here, because that would no doubt hold up incoming
- mail. Instead, I'll just log it. */
-
- for (uschar * s = domain; *s; s++)
- if (!isalnum(*s) && *s != '-' && *s != '.' && *s != '_')
- {
- log_write(0, LOG_MAIN, "dnslists domain \"%s\" contains "
- "strange characters - is this right?", domain);
- break;
- }
+ uschar * s;
- /* Check the alternate domain if present */
-
- if (domain_txt != domain) for (uschar * s = domain_txt; *s; s++)
- if (!isalnum(*s) && *s != '-' && *s != '.' && *s != '_')
+ if (n > 0) yield = buf[0];
+ if (n > 4)
+ save_errno = (buf[1] << 24) | (buf[2] << 16) | (buf[3] << 8) | buf[4];
+ if ((recipient_verify_failure = n > 5
+ ? string_copyn_taint(buf+5, n-5, GET_UNTAINTED) : NULL))
{
- log_write(0, LOG_MAIN, "dnslists domain \"%s\" contains "
- "strange characters - is this right?", domain_txt);
- break;
+ int m;
+ s = buf + 5 + Ustrlen(recipient_verify_failure) + 1;
+ m = n - (s - buf);
+ acl_verify_message = *msg =
+ m > 0 ? string_copyn_taint(s, m, GET_UNTAINTED) : NULL;
}
- /* If there is no key string, construct the query by adding the domain name
- onto the inverted host address, and perform a single DNS lookup. */
+ DEBUG(D_verify) debug_printf_indent("verify call response:"
+ " len %d yield %s errno '%s' where '%s' msg '%s'\n",
+ n, rc_names[yield], strerror(save_errno), recipient_verify_failure, *msg);
- if (!key)
- {
- if (where == ACL_WHERE_NOTSMTP_START || where == ACL_WHERE_NOTSMTP)
- {
- *log_msgptr = string_sprintf
- ("cannot test auto-keyed dnslists condition in %s ACL",
- acl_wherenames[where]);
- return ERROR;
- }
- if (sender_host_address == NULL) return FAIL; /* can never match */
- if (revadd[0] == 0) invert_address(revadd, sender_host_address);
- rc = one_check_dnsbl(domain, domain_txt, sender_host_address, revadd,
- iplist, bitmask, match_type, defer_return);
- if (rc == OK)
- {
- dnslist_domain = string_copy(domain_txt);
- dnslist_matched = string_copy(sender_host_address);
- HDEBUG(D_dnsbl) debug_printf("=> that means %s is listed at %s\n",
- sender_host_address, dnslist_domain);
- }
- if (rc != FAIL) return rc; /* OK or DEFER */
+ if ( yield == OK
+ || save_errno == 0 && Ustrcmp(recipient_verify_failure, "quota") == 0)
+ cache_quota_write(rcpt, yield, pos_cache, neg_cache);
+ else DEBUG(D_verify)
+ debug_printf_indent("result not cacheable\n");
}
-
- /* If there is a key string, it can be a list of domains or IP addresses to
- be concatenated with the main domain. */
-
else
{
- int keysep = 0;
- BOOL defer = FALSE;
- uschar *keydomain;
- uschar keybuffer[256];
- uschar keyrevadd[128];
-
- while ((keydomain = string_nextinlist(CUSS &key, &keysep, keybuffer,
- sizeof(keybuffer))) != NULL)
- {
- uschar *prepend = keydomain;
-
- if (string_is_ip_address(keydomain, NULL) != 0)
- {
- invert_address(keyrevadd, keydomain);
- prepend = keyrevadd;
- }
-
- rc = one_check_dnsbl(domain, domain_txt, keydomain, prepend, iplist,
- bitmask, match_type, defer_return);
-
- if (rc == OK)
- {
- dnslist_domain = string_copy(domain_txt);
- dnslist_matched = string_copy(keydomain);
- HDEBUG(D_dnsbl) debug_printf("=> that means %s is listed at %s\n",
- keydomain, dnslist_domain);
- return OK;
- }
-
- /* If the lookup deferred, remember this fact. We keep trying the rest
- of the list to see if we get a useful result, and if we don't, we return
- DEFER at the end. */
-
- if (rc == DEFER) defer = TRUE;
- } /* continue with next keystring domain/address */
-
- if (defer) return DEFER;
+ DEBUG(D_verify)
+ debug_printf_indent("verify call response: waitpid status 0x%04x\n", status);
}
- } /* continue with next dnsdb outer domain */
+ }
-return FAIL;
+close(pfd[pipe_read]);
+signal(SIGCHLD, oldsignal);
+errno = save_errno;
+return yield;
+
+fail:
+DEBUG(D_verify) debug_printf_indent("verify_quota_call fail in %s\n", where);
+return yield;
}
+
/* vi: aw ai sw=2
*/
/* End of verify.c */
git://git.exim.org / exim.git / blobdiff