int dmarc_init()
{
int *netmask = NULL; /* Ignored */
int is_ipv6 = 0;
char *tld_file = (dmarc_tld_file == NULL) ?
"/etc/exim/opendmarc.tlds" :
(char *)dmarc_tld_file;
/* Set some sane defaults. Also clears previous results when
* multiple messages in one connection. */
dmarc_pctx = NULL;
dmarc_status = US"none";
dmarc_abort = FALSE;
dmarc_pass_fail = US"skipped";
dmarc_used_domain = US"";
dmarc_ar_header = NULL;
dmarc_has_been_checked = FALSE;
header_from_sender = NULL;
spf_sender_domain = NULL;
spf_human_readable = NULL;
/* ACLs have "control=dmarc_disable_verify" */
if (dmarc_disable_verify == TRUE)
return OK;
(void) memset(&dmarc_ctx, '\0', sizeof dmarc_ctx);
dmarc_ctx.nscount = 0;
libdm_status = opendmarc_policy_library_init(&dmarc_ctx);
if (libdm_status != DMARC_PARSE_OKAY)
{
log_write(0, LOG_MAIN|LOG_PANIC, "DMARC failure to init library: %s",
opendmarc_policy_status_to_str(libdm_status));
dmarc_abort = TRUE;
}
if (dmarc_tld_file == NULL)
dmarc_abort = TRUE;
else if (opendmarc_tld_read_file(tld_file, NULL, NULL, NULL))
{
log_write(0, LOG_MAIN|LOG_PANIC, "DMARC failure to load tld list %s: %d",
tld_file, errno);
dmarc_abort = TRUE;
}
if (sender_host_address == NULL)
dmarc_abort = TRUE;
/* This catches locally originated email and startup errors above. */
if (!dmarc_abort)
{
is_ipv6 = string_is_ip_address(sender_host_address, netmask) == 6;
dmarc_pctx = opendmarc_policy_connect_init(sender_host_address, is_ipv6);
if (dmarc_pctx == NULL)
{
log_write(0, LOG_MAIN|LOG_PANIC,
"DMARC failure creating policy context: ip=%s", sender_host_address);
dmarc_abort = TRUE;
}
}
return OK;
}
int
iplsearch_find(void *handle, uschar *filename, uschar *keystring, int length,
uschar **result, uschar **errmsg, BOOL *do_cache)
{
do_cache = do_cache; /* Keep picky compilers happy */
if ((length == 1 && keystring[0] == '*') ||
string_is_ip_address(keystring, NULL) != 0)
{
return internal_lsearch_find(handle, filename, keystring, length, result,
errmsg, LSEARCH_IP);
}
else
{
*errmsg = string_sprintf("\"%s\" is not a valid iplsearch key (an IP "
"address, with optional CIDR mask, is wanted): "
"in a host list, use net-iplsearch as the search type", keystring);
return DEFER;
}
}
int
dnslookup_router_entry(
router_instance *rblock, /* data for this instantiation */
address_item *addr, /* address we are working on */
struct passwd *pw, /* passwd entry after check_local_user */
int verify, /* v_none/v_recipient/v_sender/v_expn */
address_item **addr_local, /* add it to this if it's local */
address_item **addr_remote, /* add it to this if it's remote */
address_item **addr_new, /* put new addresses on here */
address_item **addr_succeed) /* put old address here on success */
{
host_item h;
int rc;
int widen_sep = 0;
int whichrrs = HOST_FIND_BY_MX | HOST_FIND_BY_A;
dnslookup_router_options_block *ob =
(dnslookup_router_options_block *)(rblock->options_block);
uschar *srv_service = NULL;
uschar *widen = NULL;
uschar *pre_widen = addr->domain;
uschar *post_widen = NULL;
uschar *fully_qualified_name;
uschar *listptr;
uschar widen_buffer[256];
addr_new = addr_new; /* Keep picky compilers happy */
addr_succeed = addr_succeed;
DEBUG(D_route)
debug_printf("%s router called for %s\n domain = %s\n",
rblock->name, addr->address, addr->domain);
/* If an SRV check is required, expand the service name */
if (ob->check_srv != NULL)
{
srv_service = expand_string(ob->check_srv);
if (srv_service == NULL && !expand_string_forcedfail)
{
addr->message = string_sprintf("%s router: failed to expand \"%s\": %s",
rblock->name, ob->check_srv, expand_string_message);
return DEFER;
}
else whichrrs |= HOST_FIND_BY_SRV;
}
/* Set up the first of any widening domains. The code further down copes with
either pre- or post-widening, but at present there is no way to turn on
pre-widening, as actually doing so seems like a rather bad idea, and nobody has
requested it. Pre-widening would cause local abbreviated names to take
precedence over global names. For example, if the domain is "xxx.ch" it might
be something in the "ch" toplevel domain, but it also might be xxx.ch.xyz.com.
The choice of pre- or post-widening affects which takes precedence. If ever
somebody comes up with some kind of requirement for pre-widening, presumably
with some conditions under which it is done, it can be selected here.
The rewrite_headers option works only when routing an address at transport
time, because the alterations to the headers are not persistent so must be
worked out immediately before they are used. Sender addresses are routed for
verification purposes, but never at transport time, so any header changes that
you might expect as a result of sender domain widening do not occur. Therefore
we do not perform widening when verifying sender addresses; however, widening
sender addresses is OK if we do not have to rewrite the headers. A corollary
of this is that if the current address is not the original address, then it
does not appear in the message header so it is also OK to widen. The
suppression of widening for sender addresses is silent because it is the
normal desirable behaviour. */
if (ob->widen_domains != NULL &&
(verify != v_sender || !ob->rewrite_headers || addr->parent != NULL))
{
listptr = ob->widen_domains;
widen = string_nextinlist(&listptr, &widen_sep, widen_buffer,
sizeof(widen_buffer));
/****
if (some condition requiring pre-widening)
{
post_widen = pre_widen;
pre_widen = NULL;
}
****/
}
/* Loop to cope with explicit widening of domains as configured. This code
copes with widening that may happen before or after the original name. The
decision as to which is taken above. */
for (;;)
{
int flags = whichrrs;
BOOL removed = FALSE;
if (pre_widen != NULL)
{
h.name = pre_widen;
pre_widen = NULL;
}
else if (widen != NULL)
{
h.name = string_sprintf("%s.%s", addr->domain, widen);
widen = string_nextinlist(&listptr, &widen_sep, widen_buffer,
sizeof(widen_buffer));
DEBUG(D_route) debug_printf("%s router widened %s to %s\n", rblock->name,
addr->domain, h.name);
}
else if (post_widen != NULL)
{
h.name = post_widen;
post_widen = NULL;
DEBUG(D_route) debug_printf("%s router trying %s after widening failed\n",
rblock->name, h.name);
}
else return DECLINE;
/* Set up the rest of the initial host item. Others may get chained on if
there is more than one IP address. We set it up here instead of outside the
loop so as to re-initialize if a previous try succeeded but was rejected
because of not having an MX record. */
h.next = NULL;
h.address = NULL;
h.port = PORT_NONE;
h.mx = MX_NONE;
h.status = hstatus_unknown;
h.why = hwhy_unknown;
h.last_try = 0;
/* Unfortunately, we cannot set the mx_only option in advance, because the
DNS lookup may extend an unqualified name. Therefore, we must do the test
subsequently. We use the same logic as that for widen_domains above to avoid
requesting a header rewrite that cannot work. */
if (verify != v_sender || !ob->rewrite_headers || addr->parent != NULL)
{
if (ob->qualify_single) flags |= HOST_FIND_QUALIFY_SINGLE;
if (ob->search_parents) flags |= HOST_FIND_SEARCH_PARENTS;
}
rc = host_find_bydns(&h, rblock->ignore_target_hosts, flags, srv_service,
ob->srv_fail_domains, ob->mx_fail_domains, &fully_qualified_name, &removed);
if (removed) setflag(addr, af_local_host_removed);
/* If host found with only address records, test for the domain's being in
the mx_domains list. Note that this applies also to SRV records; the name of
the option is historical. */
if ((rc == HOST_FOUND || rc == HOST_FOUND_LOCAL) && h.mx < 0 &&
ob->mx_domains != NULL)
{
switch(match_isinlist(fully_qualified_name, &(ob->mx_domains), 0,
&domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
{
case DEFER:
addr->message = US"lookup defer for mx_domains";
return DEFER;
case OK:
DEBUG(D_route) debug_printf("%s router rejected %s: no MX record(s)\n",
rblock->name, fully_qualified_name);
continue;
}
}
/* Deferral returns forthwith, and anything other than failure breaks the
loop. */
if (rc == HOST_FIND_AGAIN)
{
if (rblock->pass_on_timeout)
{
DEBUG(D_route) debug_printf("%s router timed out, and pass_on_timeout is set\n",
rblock->name);
return PASS;
}
addr->message = US"host lookup did not complete";
return DEFER;
}
if (rc != HOST_FIND_FAILED) break;
/* Check to see if the failure is the result of MX records pointing to
non-existent domains, and if so, set an appropriate error message; the case
of an MX or SRV record pointing to "." is another special case that we can
detect. Otherwise "unknown mail domain" is used, which is confusing. Also, in
this case don't do the widening. We need check only the first host to see if
its MX has been filled in, but there is no address, because if there were any
usable addresses returned, we would not have had HOST_FIND_FAILED.
As a common cause of this problem is MX records with IP addresses on the
RHS, give a special message in this case. */
if (h.mx >= 0 && h.address == NULL)
{
setflag(addr, af_pass_message); /* This is not a security risk */
if (h.name[0] == 0)
addr->message = US"an MX or SRV record indicated no SMTP service";
else
{
addr->message = US"all relevant MX records point to non-existent hosts";
if (!allow_mx_to_ip && string_is_ip_address(h.name, NULL) != 0)
{
addr->user_message =
string_sprintf("It appears that the DNS operator for %s\n"
"has installed an invalid MX record with an IP address\n"
"instead of a domain name on the right hand side.", addr->domain);
addr->message = string_sprintf("%s or (invalidly) to IP addresses",
addr->message);
}
}
return DECLINE;
}
/* If there's a syntax error, do not continue with any widening, and note
the error. */
if (host_find_failed_syntax)
{
addr->message = string_sprintf("mail domain \"%s\" is syntactically "
"invalid", h.name);
return DECLINE;
}
}
/* If the original domain name has been changed as a result of the host lookup,
set up a child address for rerouting and request header rewrites if so
configured. Then yield REROUTED. However, if the only change is a change of
case in the domain name, which some resolvers yield (others don't), just change
the domain name in the original address so that the official version is used in
RCPT commands. */
if (Ustrcmp(addr->domain, fully_qualified_name) != 0)
{
if (strcmpic(addr->domain, fully_qualified_name) == 0)
{
uschar *at = Ustrrchr(addr->address, '@');
memcpy(at+1, fully_qualified_name, Ustrlen(at+1));
}
else
{
rf_change_domain(addr, fully_qualified_name, ob->rewrite_headers, addr_new);
return REROUTED;
}
}
/* If the yield is HOST_FOUND_LOCAL, the remote domain name either found MX
records with the lowest numbered one pointing to a host with an IP address that
is set on one of the interfaces of this machine, or found A records or got
addresses from gethostbyname() that contain one for this machine. This can
happen quite legitimately if the original name was a shortened form of a
domain, but we will have picked that up already via the name change test above.
Otherwise, the action to be taken can be configured by the self option, the
handling of which is in a separate function, as it is also required for other
routers. */
if (rc == HOST_FOUND_LOCAL)
{
rc = rf_self_action(addr, &h, rblock->self_code, rblock->self_rewrite,
rblock->self, addr_new);
if (rc != OK) return rc;
}
/* Otherwise, insist on being a secondary MX if so configured */
else if (ob->check_secondary_mx && !testflag(addr, af_local_host_removed))
{
DEBUG(D_route) debug_printf("check_secondary_mx set and local host not secondary\n");
return DECLINE;
}
/* Set up the errors address, if any. */
rc = rf_get_errors_address(addr, rblock, verify, &(addr->p.errors_address));
if (rc != OK) return rc;
/* Set up the additional and removeable headers for this address. */
rc = rf_get_munge_headers(addr, rblock, &(addr->p.extra_headers),
&(addr->p.remove_headers));
if (rc != OK) return rc;
/* Get store in which to preserve the original host item, chained on
to the address. */
addr->host_list = store_get(sizeof(host_item));
addr->host_list[0] = h;
/* Fill in the transport and queue the address for delivery. */
if (!rf_get_transport(rblock->transport_name, &(rblock->transport),
addr, rblock->name, NULL))
return DEFER;
addr->transport = rblock->transport;
return rf_queue_add(addr, addr_local, addr_remote, rblock, pw)?
OK : DEFER;
}
int
dns_basic_lookup(dns_answer *dnsa, const uschar *name, int type)
{
#ifndef STAND_ALONE
int rc = -1;
const uschar *save_domain;
#endif
res_state resp = os_get_dns_resolver_res();
tree_node *previous;
uschar node_name[290];
/* DNS lookup failures of any kind are cached in a tree. This is mainly so that
a timeout on one domain doesn't happen time and time again for messages that
have many addresses in the same domain. We rely on the resolver and name server
caching for successful lookups. */
sprintf(CS node_name, "%.255s-%s-%lx", name, dns_text_type(type),
resp->options);
previous = tree_search(tree_dns_fails, node_name);
if (previous != NULL)
{
DEBUG(D_dns) debug_printf("DNS lookup of %.255s-%s: using cached value %s\n",
name, dns_text_type(type),
(previous->data.val == DNS_NOMATCH)? "DNS_NOMATCH" :
(previous->data.val == DNS_NODATA)? "DNS_NODATA" :
(previous->data.val == DNS_AGAIN)? "DNS_AGAIN" :
(previous->data.val == DNS_FAIL)? "DNS_FAIL" : "??");
return previous->data.val;
}
#ifdef EXPERIMENTAL_INTERNATIONAL
/* Convert all names to a-label form before doing lookup */
{
uschar * alabel;
uschar * errstr = NULL;
DEBUG(D_dns) if (string_is_utf8(name))
debug_printf("convert utf8 '%s' to alabel for for lookup\n", name);
if ((alabel = string_domain_utf8_to_alabel(name, &errstr)), errstr)
{
DEBUG(D_dns)
debug_printf("DNS name '%s' utf8 conversion to alabel failed: %s\n", name,
errstr);
host_find_failed_syntax = TRUE;
return DNS_NOMATCH;
}
name = alabel;
}
#endif
/* If configured, check the hygene of the name passed to lookup. Otherwise,
although DNS lookups may give REFUSED at the lower level, some resolvers
turn this into TRY_AGAIN, which is silly. Give a NOMATCH return, since such
domains cannot be in the DNS. The check is now done by a regular expression;
give it space for substring storage to save it having to get its own if the
regex has substrings that are used - the default uses a conditional.
This test is omitted for PTR records. These occur only in calls from the dnsdb
lookup, which constructs the names itself, so they should be OK. Besides,
bitstring labels don't conform to normal name syntax. (But the aren't used any
more.)
For SRV records, we omit the initial _smtp._tcp. components at the start. */
#ifndef STAND_ALONE /* Omit this for stand-alone tests */
if (check_dns_names_pattern[0] != 0 && type != T_PTR && type != T_TXT)
{
const uschar *checkname = name;
int ovector[3*(EXPAND_MAXN+1)];
dns_pattern_init();
/* For an SRV lookup, skip over the first two components (the service and
protocol names, which both start with an underscore). */
if (type == T_SRV || type == T_TLSA)
{
while (*checkname++ != '.');
while (*checkname++ != '.');
}
if (pcre_exec(regex_check_dns_names, NULL, CCS checkname, Ustrlen(checkname),
0, PCRE_EOPT, ovector, sizeof(ovector)/sizeof(int)) < 0)
{
DEBUG(D_dns)
debug_printf("DNS name syntax check failed: %s (%s)\n", name,
dns_text_type(type));
host_find_failed_syntax = TRUE;
return DNS_NOMATCH;
}
}
#endif /* STAND_ALONE */
/* Call the resolver; for an overlong response, res_search() will return the
number of bytes the message would need, so we need to check for this case. The
effect is to truncate overlong data.
On some systems, res_search() will recognize "A-for-A" queries and return
the IP address instead of returning -1 with h_error=HOST_NOT_FOUND. Some
nameservers are also believed to do this. It is, of course, contrary to the
specification of the DNS, so we lock it out. */
if ((type == T_A || type == T_AAAA) && string_is_ip_address(name, NULL) != 0)
return DNS_NOMATCH;
/* If we are running in the test harness, instead of calling the normal resolver
(res_search), we call fakens_search(), which recognizes certain special
domains, and interfaces to a fake nameserver for certain special zones. */
dnsa->answerlen = running_in_test_harness
? fakens_search(name, type, dnsa->answer, MAXPACKET)
: res_search(CCS name, C_IN, type, dnsa->answer, MAXPACKET);
if (dnsa->answerlen > MAXPACKET)
{
DEBUG(D_dns) debug_printf("DNS lookup of %s (%s) resulted in overlong packet (size %d), truncating to %d.\n",
name, dns_text_type(type), dnsa->answerlen, MAXPACKET);
dnsa->answerlen = MAXPACKET;
}
if (dnsa->answerlen < 0) switch (h_errno)
{
case HOST_NOT_FOUND:
DEBUG(D_dns) debug_printf("DNS lookup of %s (%s) gave HOST_NOT_FOUND\n"
"returning DNS_NOMATCH\n", name, dns_text_type(type));
return dns_return(name, type, DNS_NOMATCH);
case TRY_AGAIN:
DEBUG(D_dns) debug_printf("DNS lookup of %s (%s) gave TRY_AGAIN\n",
name, dns_text_type(type));
/* Cut this out for various test programs */
#ifndef STAND_ALONE
save_domain = deliver_domain;
deliver_domain = string_copy(name); /* set $domain */
rc = match_isinlist(name, (const uschar **)&dns_again_means_nonexist, 0, NULL, NULL,
MCL_DOMAIN, TRUE, NULL);
deliver_domain = save_domain;
if (rc != OK)
{
DEBUG(D_dns) debug_printf("returning DNS_AGAIN\n");
return dns_return(name, type, DNS_AGAIN);
}
DEBUG(D_dns) debug_printf("%s is in dns_again_means_nonexist: returning "
"DNS_NOMATCH\n", name);
return dns_return(name, type, DNS_NOMATCH);
#else /* For stand-alone tests */
return dns_return(name, type, DNS_AGAIN);
#endif
case NO_RECOVERY:
DEBUG(D_dns) debug_printf("DNS lookup of %s (%s) gave NO_RECOVERY\n"
"returning DNS_FAIL\n", name, dns_text_type(type));
return dns_return(name, type, DNS_FAIL);
case NO_DATA:
DEBUG(D_dns) debug_printf("DNS lookup of %s (%s) gave NO_DATA\n"
"returning DNS_NODATA\n", name, dns_text_type(type));
return dns_return(name, type, DNS_NODATA);
default:
DEBUG(D_dns) debug_printf("DNS lookup of %s (%s) gave unknown DNS error %d\n"
"returning DNS_FAIL\n", name, dns_text_type(type), h_errno);
return dns_return(name, type, DNS_FAIL);
}
DEBUG(D_dns) debug_printf("DNS lookup of %s (%s) succeeded\n",
name, dns_text_type(type));
return DNS_SUCCEED;
}
static int
dnsdb_find(void *handle, uschar *filename, const uschar *keystring, int length,
uschar **result, uschar **errmsg, uint *do_cache)
{
int rc;
int size = 256;
int ptr = 0;
int sep = 0;
int defer_mode = PASS;
int dnssec_mode = OK;
int save_retrans = dns_retrans;
int save_retry = dns_retry;
int type;
int failrc = FAIL;
const uschar *outsep = CUS"\n";
const uschar *outsep2 = NULL;
uschar *equals, *domain, *found;
/* Because we're the working in the search pool, we try to reclaim as much
store as possible later, so we preallocate the result here */
uschar *yield = store_get(size);
dns_record *rr;
dns_answer dnsa;
dns_scan dnss;
handle = handle; /* Keep picky compilers happy */
filename = filename;
length = length;
do_cache = do_cache;
/* If the string starts with '>' we change the output separator.
If it's followed by ';' or ',' we set the TXT output separator. */
while (isspace(*keystring)) keystring++;
if (*keystring == '>')
{
outsep = keystring + 1;
keystring += 2;
if (*keystring == ',')
{
outsep2 = keystring + 1;
keystring += 2;
}
else if (*keystring == ';')
{
outsep2 = US"";
keystring++;
}
while (isspace(*keystring)) keystring++;
}
/* Check for a modifier keyword. */
for (;;)
{
if (strncmpic(keystring, US"defer_", 6) == 0)
{
keystring += 6;
if (strncmpic(keystring, US"strict", 6) == 0)
{ defer_mode = DEFER; keystring += 6; }
else if (strncmpic(keystring, US"lax", 3) == 0)
{ defer_mode = PASS; keystring += 3; }
else if (strncmpic(keystring, US"never", 5) == 0)
{ defer_mode = OK; keystring += 5; }
else
{
*errmsg = US"unsupported dnsdb defer behaviour";
return DEFER;
}
}
else if (strncmpic(keystring, US"dnssec_", 7) == 0)
{
keystring += 7;
if (strncmpic(keystring, US"strict", 6) == 0)
{ dnssec_mode = DEFER; keystring += 6; }
else if (strncmpic(keystring, US"lax", 3) == 0)
{ dnssec_mode = PASS; keystring += 3; }
else if (strncmpic(keystring, US"never", 5) == 0)
{ dnssec_mode = OK; keystring += 5; }
else
{
*errmsg = US"unsupported dnsdb dnssec behaviour";
return DEFER;
}
}
else if (strncmpic(keystring, US"retrans_", 8) == 0)
{
int timeout_sec;
if ((timeout_sec = readconf_readtime(keystring += 8, ',', FALSE)) <= 0)
{
*errmsg = US"unsupported dnsdb timeout value";
return DEFER;
}
dns_retrans = timeout_sec;
while (*keystring != ',') keystring++;
}
else if (strncmpic(keystring, US"retry_", 6) == 0)
{
int retries;
if ((retries = (int)strtol(CCS keystring + 6, CSS &keystring, 0)) < 0)
{
*errmsg = US"unsupported dnsdb retry count";
return DEFER;
}
dns_retry = retries;
}
else
break;
while (isspace(*keystring)) keystring++;
if (*keystring++ != ',')
{
*errmsg = US"dnsdb modifier syntax error";
return DEFER;
}
while (isspace(*keystring)) keystring++;
}
/* Figure out the "type" value if it is not T_TXT.
If the keystring contains an = this must be preceded by a valid type name. */
type = T_TXT;
if ((equals = Ustrchr(keystring, '=')) != NULL)
{
int i, len;
uschar *tend = equals;
while (tend > keystring && isspace(tend[-1])) tend--;
len = tend - keystring;
for (i = 0; i < nelem(type_names); i++)
if (len == Ustrlen(type_names[i]) &&
strncmpic(keystring, US type_names[i], len) == 0)
{
type = type_values[i];
break;
}
if (i >= nelem(type_names))
{
*errmsg = US"unsupported DNS record type";
return DEFER;
}
keystring = equals + 1;
while (isspace(*keystring)) keystring++;
}
/* Initialize the resolver in case this is the first time it has been used. */
dns_init(FALSE, FALSE, dnssec_mode != OK);
/* The remainder of the string must be a list of domains. As long as the lookup
for at least one of them succeeds, we return success. Failure means that none
of them were found.
The original implementation did not support a list of domains. Adding the list
feature is compatible, except in one case: when PTR records are being looked up
for a single IPv6 address. Fortunately, we can hack in a compatibility feature
here: If the type is PTR and no list separator is specified, and the entire
remaining string is valid as an IP address, set an impossible separator so that
it is treated as one item. */
if (type == T_PTR && keystring[0] != '<' &&
string_is_ip_address(keystring, NULL) != 0)
sep = -1;
/* SPF strings should be concatenated without a separator, thus make
it the default if not defined (see RFC 4408 section 3.1.3).
Multiple SPF records are forbidden (section 3.1.2) but are currently
not handled specially, thus they are concatenated with \n by default.
MX priority and value are space-separated by default.
SRV and TLSA record parts are space-separated by default. */
if (!outsep2) switch(type)
{
case T_SPF: outsep2 = US""; break;
case T_SRV: case T_MX: case T_TLSA: outsep2 = US" "; break;
}
/* Now scan the list and do a lookup for each item */
while ((domain = string_nextinlist(&keystring, &sep, NULL, 0)))
{
uschar rbuffer[256];
int searchtype = (type == T_CSA)? T_SRV : /* record type we want */
(type == T_MXH)? T_MX :
(type == T_ZNS)? T_NS : type;
/* If the type is PTR or CSA, we have to construct the relevant magic lookup
key if the original is an IP address (some experimental protocols are using
PTR records for different purposes where the key string is a host name, and
Exim's extended CSA can be keyed by domains or IP addresses). This code for
doing the reversal is now in a separate function. */
if ((type == T_PTR || type == T_CSA) &&
string_is_ip_address(domain, NULL) != 0)
{
dns_build_reverse(domain, rbuffer);
domain = rbuffer;
}
do
{
DEBUG(D_lookup) debug_printf("dnsdb key: %s\n", domain);
/* Do the lookup and sort out the result. There are four special types that
are handled specially: T_CSA, T_ZNS, T_ADDRESSES and T_MXH.
The first two are handled in a special lookup function so that the facility
could be used from other parts of the Exim code. T_ADDRESSES is handled by looping
over the types of A lookup. T_MXH affects only what happens later on in
this function, but for tidiness it is handled by the "special". If the
lookup fails, continue with the next domain. In the case of DEFER, adjust
the final "nothing found" result, but carry on to the next domain. */
found = domain;
#if HAVE_IPV6
if (type == T_ADDRESSES) /* NB cannot happen unless HAVE_IPV6 */
{
if (searchtype == T_ADDRESSES) searchtype = T_AAAA;
else if (searchtype == T_AAAA) searchtype = T_A;
rc = dns_special_lookup(&dnsa, domain, searchtype, CUSS &found);
}
else
#endif
rc = dns_special_lookup(&dnsa, domain, type, CUSS &found);
lookup_dnssec_authenticated = dnssec_mode==OK ? NULL
: dns_is_secure(&dnsa) ? US"yes" : US"no";
if (rc == DNS_NOMATCH || rc == DNS_NODATA) continue;
if ( rc != DNS_SUCCEED
|| (dnssec_mode == DEFER && !dns_is_secure(&dnsa))
)
{
if (defer_mode == DEFER)
{
dns_retrans = save_retrans;
dns_retry = save_retry;
dns_init(FALSE, FALSE, FALSE); /* clr dnssec bit */
return DEFER; /* always defer */
}
if (defer_mode == PASS) failrc = DEFER; /* defer only if all do */
continue; /* treat defer as fail */
}
/* Search the returned records */
for (rr = dns_next_rr(&dnsa, &dnss, RESET_ANSWERS);
rr != NULL;
rr = dns_next_rr(&dnsa, &dnss, RESET_NEXT))
{
if (rr->type != searchtype) continue;
if (*do_cache > rr->ttl)
*do_cache = rr->ttl;
if (type == T_A || type == T_AAAA || type == T_ADDRESSES)
{
dns_address *da;
for (da = dns_address_from_rr(&dnsa, rr); da; da = da->next)
{
if (ptr != 0) yield = string_catn(yield, &size, &ptr, outsep, 1);
yield = string_cat(yield, &size, &ptr, da->address);
}
continue;
}
/* Other kinds of record just have one piece of data each, but there may be
several of them, of course. */
if (ptr != 0) yield = string_catn(yield, &size, &ptr, outsep, 1);
if (type == T_TXT || type == T_SPF)
{
if (outsep2 == NULL)
{
/* output only the first item of data */
yield = string_catn(yield, &size, &ptr, (uschar *)(rr->data+1),
(rr->data)[0]);
}
else
{
/* output all items */
int data_offset = 0;
while (data_offset < rr->size)
{
uschar chunk_len = (rr->data)[data_offset++];
if (outsep2[0] != '\0' && data_offset != 1)
yield = string_catn(yield, &size, &ptr, outsep2, 1);
yield = string_catn(yield, &size, &ptr,
US ((rr->data)+data_offset), chunk_len);
data_offset += chunk_len;
}
}
}
else if (type == T_TLSA)
{
uint8_t usage, selector, matching_type;
uint16_t i, payload_length;
uschar s[MAX_TLSA_EXPANDED_SIZE];
uschar * sp = s;
uschar * p = US rr->data;
usage = *p++;
selector = *p++;
matching_type = *p++;
/* What's left after removing the first 3 bytes above */
payload_length = rr->size - 3;
sp += sprintf(CS s, "%d%c%d%c%d%c", usage, *outsep2,
selector, *outsep2, matching_type, *outsep2);
/* Now append the cert/identifier, one hex char at a time */
for (i=0;
i < payload_length && sp-s < (MAX_TLSA_EXPANDED_SIZE - 4);
i++)
sp += sprintf(CS sp, "%02x", (unsigned char)p[i]);
yield = string_cat(yield, &size, &ptr, s);
}
else /* T_CNAME, T_CSA, T_MX, T_MXH, T_NS, T_PTR, T_SOA, T_SRV */
{
int priority, weight, port;
uschar s[264];
uschar * p = US rr->data;
switch (type)
{
case T_MXH:
/* mxh ignores the priority number and includes only the hostnames */
GETSHORT(priority, p);
break;
case T_MX:
GETSHORT(priority, p);
sprintf(CS s, "%d%c", priority, *outsep2);
yield = string_cat(yield, &size, &ptr, s);
break;
case T_SRV:
GETSHORT(priority, p);
GETSHORT(weight, p);
GETSHORT(port, p);
sprintf(CS s, "%d%c%d%c%d%c", priority, *outsep2,
weight, *outsep2, port, *outsep2);
yield = string_cat(yield, &size, &ptr, s);
break;
case T_CSA:
/* See acl_verify_csa() for more comments about CSA. */
GETSHORT(priority, p);
GETSHORT(weight, p);
GETSHORT(port, p);
if (priority != 1) continue; /* CSA version must be 1 */
/* If the CSA record we found is not the one we asked for, analyse
the subdomain assertions in the port field, else analyse the direct
authorization status in the weight field. */
if (Ustrcmp(found, domain) != 0)
{
if (port & 1) *s = 'X'; /* explicit authorization required */
else *s = '?'; /* no subdomain assertions here */
}
else
{
if (weight < 2) *s = 'N'; /* not authorized */
else if (weight == 2) *s = 'Y'; /* authorized */
else if (weight == 3) *s = '?'; /* unauthorizable */
else continue; /* invalid */
}
s[1] = ' ';
yield = string_catn(yield, &size, &ptr, s, 2);
break;
default:
break;
}
/* GETSHORT() has advanced the pointer to the target domain. */
rc = dn_expand(dnsa.answer, dnsa.answer + dnsa.answerlen, p,
(DN_EXPAND_ARG4_TYPE)s, sizeof(s));
/* If an overlong response was received, the data will have been
truncated and dn_expand may fail. */
if (rc < 0)
{
log_write(0, LOG_MAIN, "host name alias list truncated: type=%s "
"domain=%s", dns_text_type(type), domain);
break;
}
else yield = string_cat(yield, &size, &ptr, s);
if (type == T_SOA && outsep2 != NULL)
{
unsigned long serial, refresh, retry, expire, minimum;
p += rc;
yield = string_catn(yield, &size, &ptr, outsep2, 1);
rc = dn_expand(dnsa.answer, dnsa.answer + dnsa.answerlen, p,
(DN_EXPAND_ARG4_TYPE)s, sizeof(s));
if (rc < 0)
{
log_write(0, LOG_MAIN, "responsible-mailbox truncated: type=%s "
"domain=%s", dns_text_type(type), domain);
break;
}
else yield = string_cat(yield, &size, &ptr, s);
p += rc;
GETLONG(serial, p); GETLONG(refresh, p);
GETLONG(retry, p); GETLONG(expire, p); GETLONG(minimum, p);
sprintf(CS s, "%c%lu%c%lu%c%lu%c%lu%c%lu",
*outsep2, serial, *outsep2, refresh,
*outsep2, retry, *outsep2, expire, *outsep2, minimum);
yield = string_cat(yield, &size, &ptr, s);
}
}
} /* Loop for list of returned records */
/* Loop for set of A-lookup types */
} while (type == T_ADDRESSES && searchtype != T_A);
} /* Loop for list of domains */
/* Reclaim unused memory */
store_reset(yield + ptr + 1);
/* If ptr == 0 we have not found anything. Otherwise, insert the terminating
zero and return the result. */
dns_retrans = save_retrans;
dns_retry = save_retry;
dns_init(FALSE, FALSE, FALSE); /* clear the dnssec bit for getaddrbyname */
if (ptr == 0) return failrc;
yield[ptr] = 0;
*result = yield;
return OK;
}
int
rf_lookup_hostlist(router_instance *rblock, address_item *addr,
uschar *ignore_target_hosts, int lookup_type, int hff_code,
address_item **addr_new)
{
BOOL self_send = FALSE;
/* Look up each host address. A lookup may add additional items into the chain
if there are multiple addresses. Hence the use of next_h to start each cycle of
the loop at the next original host. If any host is identified as being the local
host, omit it and any subsequent hosts - i.e. treat the list like an ordered
list of MX hosts. If the first host is the local host, act according to the
"self" option in the configuration. */
for (host_item * prev = NULL, * h = addr->host_list, *next_h; h; h = next_h)
{
const uschar *canonical_name;
int rc, len, port, mx, sort_key;
next_h = h->next;
if (h->address) { prev = h; continue; }
DEBUG(D_route|D_host_lookup)
debug_printf("finding IP address for %s\n", h->name);
/* Handle any port setting that may be on the name; it will be removed
from the end of the name. */
port = host_item_get_port(h);
/* Store the previous mx and sort_key values, which were assigned in
host_build_hostlist and will be overwritten by host_find_bydns. */
mx = h->mx;
sort_key = h->sort_key;
/* If the name ends with "/MX", we interpret it to mean "the list of hosts
pointed to by MX records with this name", and the MX record values override
the ordering from host_build_hostlist. */
len = Ustrlen(h->name);
if (len > 3 && strcmpic(h->name + len - 3, US"/mx") == 0)
{
int whichrrs = lookup_type & LK_IPV4_ONLY
? HOST_FIND_BY_MX | HOST_FIND_IPV4_ONLY
: lookup_type & LK_IPV4_PREFER
? HOST_FIND_BY_MX | HOST_FIND_IPV4_FIRST
: HOST_FIND_BY_MX;
DEBUG(D_route|D_host_lookup)
debug_printf("doing DNS MX lookup for %s\n", h->name);
mx = MX_NONE;
h->name = string_copyn(h->name, len - 3);
rc = host_find_bydns(h,
ignore_target_hosts,
whichrrs, /* look only for MX records */
NULL, /* SRV service not relevant */
NULL, /* failing srv domains not relevant */
NULL, /* no special mx failing domains */
&rblock->dnssec, /* dnssec request/require */
NULL, /* fully_qualified_name */
NULL); /* indicate local host removed */
}
/* If explicitly configured to look up by name, or if the "host name" is
actually an IP address, do a byname lookup. */
else if (lookup_type & LK_BYNAME || string_is_ip_address(h->name, NULL) != 0)
{
DEBUG(D_route|D_host_lookup) debug_printf("calling host_find_byname\n");
rc = host_find_byname(h, ignore_target_hosts, HOST_FIND_QUALIFY_SINGLE,
&canonical_name, TRUE);
}
/* Otherwise, do a DNS lookup. If that yields "host not found", and the
lookup type is the default (i.e. "bydns" is not explicitly configured),
follow up with a byname lookup, just in case. */
else
{
BOOL removed;
int whichrrs = lookup_type & LK_IPV4_ONLY
? HOST_FIND_BY_A
: lookup_type & LK_IPV4_PREFER
? HOST_FIND_BY_A | HOST_FIND_BY_AAAA | HOST_FIND_IPV4_FIRST
: HOST_FIND_BY_A | HOST_FIND_BY_AAAA;
DEBUG(D_route|D_host_lookup) debug_printf("doing DNS lookup\n");
switch (rc = host_find_bydns(h, ignore_target_hosts, whichrrs, NULL,
NULL, NULL,
&rblock->dnssec, /* domains for request/require */
&canonical_name, &removed))
{
case HOST_FOUND:
if (removed) setflag(addr, af_local_host_removed);
break;
case HOST_FIND_FAILED:
if (lookup_type & LK_DEFAULT)
{
DEBUG(D_route|D_host_lookup)
debug_printf("DNS lookup failed: trying getipnodebyname\n");
rc = host_find_byname(h, ignore_target_hosts, HOST_FIND_QUALIFY_SINGLE,
&canonical_name, TRUE);
}
break;
}
}
/* Temporary failure defers, unless pass_on_timeout is set */
if (rc == HOST_FIND_SECURITY)
{
addr->message = string_sprintf("host lookup for %s done insecurely" , h->name);
addr->basic_errno = ERRNO_DNSDEFER;
return DEFER;
}
if (rc == HOST_FIND_AGAIN)
{
if (rblock->pass_on_timeout)
{
DEBUG(D_route)
debug_printf("%s router timed out and pass_on_timeout set\n",
rblock->name);
return PASS;
}
addr->message = string_sprintf("host lookup for %s did not complete "
"(DNS timeout?)", h->name);
addr->basic_errno = ERRNO_DNSDEFER;
return DEFER;
}
/* Permanent failure is controlled by host_find_failed */
if (rc == HOST_FIND_FAILED)
{
if (hff_code == hff_ignore)
{
if (prev == NULL) addr->host_list = next_h; else prev->next = next_h;
continue; /* With the next host, leave prev unchanged */
}
if (hff_code == hff_pass) return PASS;
if (hff_code == hff_decline) return DECLINE;
addr->basic_errno = ERRNO_UNKNOWNHOST;
addr->message =
string_sprintf("lookup of host \"%s\" failed in %s router%s",
h->name, rblock->name,
f.host_find_failed_syntax? ": syntax error in name" : "");
if (hff_code == hff_defer) return DEFER;
if (hff_code == hff_fail) return FAIL;
addr->special_action = SPECIAL_FREEZE;
return DEFER;
}
/* Deal with the settings that were previously cleared:
port, mx and sort_key. */
if (port != PORT_NONE)
for (host_item * hh = h; hh != next_h; hh = hh->next)
hh->port = port;
if (mx != MX_NONE)
for (host_item * hh = h; hh != next_h; hh = hh->next)
{
hh->mx = mx;
hh->sort_key = sort_key;
}
/* A local host gets chopped, with its successors, if there are previous
hosts. Otherwise the self option is used. If it is set to "send", any
subsequent hosts that are also the local host do NOT get chopped. */
if (rc == HOST_FOUND_LOCAL && !self_send)
{
if (prev)
{
DEBUG(D_route)
{
debug_printf("Removed from host list:\n");
for (; h; h = h->next) debug_printf(" %s\n", h->name);
}
prev->next = NULL;
setflag(addr, af_local_host_removed);
break;
}
rc = rf_self_action(addr, h, rblock->self_code, rblock->self_rewrite,
rblock->self, addr_new);
if (rc != OK)
{
addr->host_list = NULL; /* Kill the host list for */
return rc; /* anything other than "send" */
}
self_send = TRUE;
}
/* Ensure that prev is the host before next_h; this will not be h if a lookup
found multiple addresses or multiple MX records. */
prev = h;
while (prev->next != next_h) prev = prev->next;
}
return OK;
}
/* Create a socket and connect to host (name or number, ipv6 ok)
at one of port-range.
Arguments:
type SOCK_DGRAM or SOCK_STREAM
af AF_INET6 or AF_INET for the socket type
address the remote address, in text form
portlo,porthi the remote port range
timeout a timeout
connhost if not NULL, host_item filled in with connection details
errstr pointer for allocated string on error
Return:
socket fd, or -1 on failure (having allocated an error string)
*/
int
ip_connectedsocket(int type, const uschar * hostname, int portlo, int porthi,
int timeout, host_item * connhost, uschar ** errstr)
{
int namelen, port;
host_item shost;
host_item *h;
int af = 0, fd, fd4 = -1, fd6 = -1;
shost.next = NULL;
shost.address = NULL;
shost.port = portlo;
shost.mx = -1;
namelen = Ustrlen(hostname);
/* Anything enclosed in [] must be an IP address. */
if (hostname[0] == '[' &&
hostname[namelen - 1] == ']')
{
uschar * host = string_copy(hostname);
host[namelen - 1] = 0;
host++;
if (string_is_ip_address(host, NULL) == 0)
{
*errstr = string_sprintf("malformed IP address \"%s\"", hostname);
return -1;
}
shost.name = shost.address = host;
}
/* Otherwise check for an unadorned IP address */
else if (string_is_ip_address(hostname, NULL) != 0)
shost.name = shost.address = string_copy(hostname);
/* Otherwise lookup IP address(es) from the name */
else
{
shost.name = string_copy(hostname);
if (host_find_byname(&shost, NULL, HOST_FIND_QUALIFY_SINGLE, NULL,
FALSE) != HOST_FOUND)
{
*errstr = string_sprintf("no IP address found for host %s", shost.name);
return -1;
}
}
/* Try to connect to the server - test each IP till one works */
for (h = &shost; h != NULL; h = h->next)
{
fd = (Ustrchr(h->address, ':') != 0)
? (fd6 < 0) ? (fd6 = ip_socket(type, af = AF_INET6)) : fd6
: (fd4 < 0) ? (fd4 = ip_socket(type, af = AF_INET )) : fd4;
if (fd < 0)
{
*errstr = string_sprintf("failed to create socket: %s", strerror(errno));
goto bad;
}
for(port = portlo; port <= porthi; port++)
if (ip_connect(fd, af, h->address, port, timeout) == 0)
{
if (fd != fd6) close(fd6);
if (fd != fd4) close(fd4);
if (connhost) {
h->port = port;
*connhost = *h;
connhost->next = NULL;
}
return fd;
}
}
*errstr = string_sprintf("failed to connect to any address for %s: %s",
hostname, strerror(errno));
bad:
close(fd4); close(fd6); return -1;
}
static int
internal_lsearch_find(void *handle, uschar *filename, uschar *keystring,
int length, uschar **result, uschar **errmsg, int type)
{
FILE *f = (FILE *)handle;
BOOL last_was_eol = TRUE;
BOOL this_is_eol = TRUE;
int old_pool = store_pool;
void *reset_point = NULL;
uschar buffer[4096];
/* Wildcard searches may use up some store, because of expansions. We don't
want them to fill up our search store. What we do is set the pool to the main
pool and get a point to reset to later. Wildcard searches could also issue
lookups, but internal_search_find will take care of that, and the cache will be
safely stored in the search pool again. */
if(type == LSEARCH_WILD || type == LSEARCH_NWILD)
{
store_pool = POOL_MAIN;
reset_point = store_get(0);
}
filename = filename; /* Keep picky compilers happy */
errmsg = errmsg;
rewind(f);
for (last_was_eol = TRUE;
Ufgets(buffer, sizeof(buffer), f) != NULL;
last_was_eol = this_is_eol)
{
int ptr, size;
int p = Ustrlen(buffer);
int linekeylength;
BOOL this_is_comment;
uschar *yield;
uschar *s = buffer;
/* Check whether this the final segment of a line. If it follows an
incomplete part-line, skip it. */
this_is_eol = p > 0 && buffer[p-1] == '\n';
if (!last_was_eol) continue;
/* We now have the start of a physical line. If this is a final line segment,
remove trailing white space. */
if (this_is_eol)
{
while (p > 0 && isspace((uschar)buffer[p-1])) p--;
buffer[p] = 0;
}
/* If the buffer is empty it might be (a) a complete empty line, or (b) the
start of a line that begins with so much white space that it doesn't all fit
in the buffer. In both cases we want to skip the entire physical line.
If the buffer begins with # it is a comment line; if it begins with white
space it is a logical continuation; again, we want to skip the entire
physical line. */
if (buffer[0] == 0 || buffer[0] == '#' || isspace(buffer[0])) continue;
/* We assume that they key will fit in the buffer. If the key starts with ",
read it as a quoted string. We don't use string_dequote() because that uses
new store for the result, and we may be doing this many times in a long file.
We know that the dequoted string must be shorter than the original, because
we are removing the quotes, and also any escape sequences always turn two or
more characters into one character. Therefore, we can store the new string in
the same buffer. */
if (*s == '\"')
{
uschar *t = s++;
while (*s != 0 && *s != '\"')
{
if (*s == '\\') *t++ = string_interpret_escape(&s);
else *t++ = *s;
s++;
}
if (*s != 0) s++; /* Past terminating " */
linekeylength = t - buffer;
}
/* Otherwise it is terminated by a colon or white space */
else
{
while (*s != 0 && *s != ':' && !isspace(*s)) s++;
linekeylength = s - buffer;
}
/* The matching test depends on which kind of lsearch we are doing */
switch(type)
{
/* A plain lsearch treats each key as a literal */
case LSEARCH_PLAIN:
if (linekeylength != length || strncmpic(buffer, keystring, length) != 0)
continue;
break; /* Key matched */
/* A wild lsearch treats each key as a possible wildcarded string; no
expansion is done for nwildlsearch. */
case LSEARCH_WILD:
case LSEARCH_NWILD:
{
int rc;
int save = buffer[linekeylength];
uschar *list = buffer;
buffer[linekeylength] = 0;
rc = match_isinlist(keystring,
&list,
UCHAR_MAX+1, /* Single-item list */
NULL, /* No anchor */
NULL, /* No caching */
MCL_STRING + ((type == LSEARCH_WILD)? 0:MCL_NOEXPAND),
TRUE, /* Caseless */
NULL);
buffer[linekeylength] = save;
if (rc == FAIL) continue;
if (rc == DEFER) return DEFER;
}
/* The key has matched. If the search involved a regular expression, it
might have caused numerical variables to be set. However, their values will
be in the wrong storage pool for external use. Copying them to the standard
pool is not feasible because of the caching of lookup results - a repeated
lookup will not match the regular expression again. Therefore, we flatten
all numeric variables at this point. */
expand_nmax = -1;
break;
/* Compare an ip address against a list of network/ip addresses. We have to
allow for the "*" case specially. */
case LSEARCH_IP:
if (linekeylength == 1 && buffer[0] == '*')
{
if (length != 1 || keystring[0] != '*') continue;
}
else if (length == 1 && keystring[0] == '*') continue;
else
{
int maskoffset;
int save = buffer[linekeylength];
buffer[linekeylength] = 0;
if (string_is_ip_address(buffer, &maskoffset) == 0 ||
!host_is_in_net(keystring, buffer, maskoffset)) continue;
buffer[linekeylength] = save;
}
break; /* Key matched */
}
/* The key has matched. Skip spaces after the key, and allow an optional
colon after the spaces. This is an odd specification, but it's for
compatibility. */
while (isspace((uschar)*s)) s++;
if (*s == ':')
{
s++;
while (isspace((uschar)*s)) s++;
}
/* Reset dynamic store, if we need to, and revert to the search pool */
if (reset_point != NULL)
{
store_reset(reset_point);
store_pool = old_pool;
}
/* Now we want to build the result string to contain the data. There can be
two kinds of continuation: (a) the physical line may not all have fitted into
the buffer, and (b) there may be logical continuation lines, for which we
must convert all leading white space into a single blank.
Initialize, and copy the first segment of data. */
this_is_comment = FALSE;
size = 100;
ptr = 0;
yield = store_get(size);
if (*s != 0)
yield = string_cat(yield, &size, &ptr, s, Ustrlen(s));
/* Now handle continuations */
for (last_was_eol = this_is_eol;
Ufgets(buffer, sizeof(buffer), f) != NULL;
last_was_eol = this_is_eol)
{
s = buffer;
p = Ustrlen(buffer);
this_is_eol = p > 0 && buffer[p-1] == '\n';
/* Remove trailing white space from a physical line end */
if (this_is_eol)
{
while (p > 0 && isspace((uschar)buffer[p-1])) p--;
buffer[p] = 0;
}
/* If this is not a physical line continuation, skip it entirely if it's
empty or starts with #. Otherwise, break the loop if it doesn't start with
white space. Otherwise, replace leading white space with a single blank. */
if (last_was_eol)
{
this_is_comment = (this_is_comment || (buffer[0] == 0 || buffer[0] == '#'));
if (this_is_comment) continue;
if (!isspace((uschar)buffer[0])) break;
while (isspace((uschar)*s)) s++;
*(--s) = ' ';
}
if (this_is_comment) continue;
/* Join a physical or logical line continuation onto the result string. */
yield = string_cat(yield, &size, &ptr, s, Ustrlen(s));
}
yield[ptr] = 0;
store_reset(yield + ptr + 1);
*result = yield;
return OK;
}
/* Reset dynamic store, if we need to */
if (reset_point != NULL)
{
store_reset(reset_point);
store_pool = old_pool;
}
return FAIL;
}
int
ipliteral_router_entry(
router_instance *rblock, /* data for this instantiation */
address_item *addr, /* address we are working on */
struct passwd *pw, /* passwd entry after check_local_user */
int verify, /* v_none/v_recipient/v_sender/v_expn */
address_item **addr_local, /* add it to this if it's local */
address_item **addr_remote, /* add it to this if it's remote */
address_item **addr_new, /* put new addresses on here */
address_item **addr_succeed) /* put old address here on success */
{
/*
ipliteral_router_options_block *ob =
(ipliteral_router_options_block *)(rblock->options_block);
*/
host_item *h;
const uschar *domain = addr->domain;
const uschar *ip;
int len = Ustrlen(domain);
int rc, ipv;
addr_new = addr_new; /* Keep picky compilers happy */
addr_succeed = addr_succeed;
DEBUG(D_route) debug_printf("%s router called for %s: domain = %s\n",
rblock->name, addr->address, addr->domain);
/* Check that the domain is an IP address enclosed in square brackets. Remember
to allow for the "official" form of IPv6 addresses. If not, the router
declines. Otherwise route to the single IP address, setting the host name to
"(unnamed)". */
if (domain[0] != '[' || domain[len-1] != ']') return DECLINE;
ip = string_copyn(domain+1, len-2);
if (strncmpic(ip, US"IPV6:", 5) == 0 || strncmpic(ip, US"IPV4:", 5) == 0)
ip += 5;
ipv = string_is_ip_address(ip, NULL);
if (ipv == 0 || (disable_ipv6 && ipv == 6))
return DECLINE;
/* It seems unlikely that ignore_target_hosts will be used with this router,
but if it is set, it should probably work. */
if (verify_check_this_host(CUSS&rblock->ignore_target_hosts,
NULL, domain, ip, NULL) == OK)
{
DEBUG(D_route)
debug_printf("%s is in ignore_target_hosts\n", ip);
addr->message = US"IP literal host explicitly ignored";
return DECLINE;
}
/* Set up a host item */
h = store_get(sizeof(host_item));
h->next = NULL;
h->address = string_copy(ip);
h->port = PORT_NONE;
h->name = domain;
h->mx = MX_NONE;
h->status = hstatus_unknown;
h->why = hwhy_unknown;
h->last_try = 0;
/* Determine whether the host is the local host, and if so, take action
according to the configuration. */
if (host_scan_for_local_hosts(h, &h, NULL) == HOST_FOUND_LOCAL)
{
int rc = rf_self_action(addr, h, rblock->self_code, rblock->self_rewrite,
rblock->self, addr_new);
if (rc != OK) return rc;
}
/* Address is routed to this host */
addr->host_list = h;
/* Set up the errors address, if any. */
rc = rf_get_errors_address(addr, rblock, verify, &addr->prop.errors_address);
if (rc != OK) return rc;
/* Set up the additional and removable headers for this address. */
rc = rf_get_munge_headers(addr, rblock, &addr->prop.extra_headers,
&addr->prop.remove_headers);
if (rc != OK) return rc;
/* Fill in the transport, queue the address for local or remote delivery, and
yield success. For local delivery, of course, the IP address won't be used. If
just verifying, there need not be a transport, in which case it doesn't matter
which queue we put the address on. This is all now handled by the route_queue()
function. */
if (!rf_get_transport(rblock->transport_name, &(rblock->transport),
addr, rblock->name, NULL))
return DEFER;
addr->transport = rblock->transport;
return rf_queue_add(addr, addr_local, addr_remote, rblock, pw)?
OK : DEFER;
}