*************************************************/
/* Copyright (c) University of Cambridge 1995 - 2018 */
+/* Copyright (c) The Exim Maintainers 2020 */
/* See the file NOTICE for conditions of use and distribution. */
/* Functions for finding hosts, either by gethostbyname(), gethostbyaddr(), or
time_msec = get_time_in_ms();
retval = dns_lookup(dnsa, name, type, fully_qualified_name);
if ((time_msec = get_time_in_ms() - time_msec) > slow_lookup_log)
- log_long_lookup(US"name", name, time_msec);
+ log_long_lookup(dns_text_type(type), name, time_msec);
return retval;
}
uschar *adds;
uschar **alist;
struct hostent *yield;
-dns_answer dnsa;
+dns_answer * dnsa = store_get_dns_answer();
dns_scan dnss;
-dns_record *rr;
DEBUG(D_host_lookup)
debug_printf("using host_fake_gethostbyname for %s (%s)\n", name,
- (af == AF_INET)? "IPv4" : "IPv6");
+ af == AF_INET ? "IPv4" : "IPv6");
/* Handle unqualified "localhost" */
if (Ustrcmp(name, "localhost") == 0)
- lname = (af == AF_INET)? US"127.0.0.1" : US"::1";
+ lname = af == AF_INET ? US"127.0.0.1" : US"::1";
/* Handle a literal IP address */
-ipa = string_is_ip_address(lname, NULL);
-if (ipa != 0)
- {
- if ((ipa == 4 && af == AF_INET) ||
- (ipa == 6 && af == AF_INET6))
+if ((ipa = string_is_ip_address(lname, NULL)) != 0)
+ if ( ipa == 4 && af == AF_INET
+ || ipa == 6 && af == AF_INET6)
{
- int i, n;
int x[4];
- yield = store_get(sizeof(struct hostent));
- alist = store_get(2 * sizeof(char *));
- adds = store_get(alen);
+ yield = store_get(sizeof(struct hostent), FALSE);
+ alist = store_get(2 * sizeof(char *), FALSE);
+ adds = store_get(alen, FALSE);
yield->h_name = CS name;
yield->h_aliases = NULL;
yield->h_addrtype = af;
yield->h_length = alen;
yield->h_addr_list = CSS alist;
*alist++ = adds;
- n = host_aton(lname, x);
- for (i = 0; i < n; i++)
+ for (int n = host_aton(lname, x), i = 0; i < n; i++)
{
int y = x[i];
*adds++ = (y >> 24) & 255;
else
{
*error_num = HOST_NOT_FOUND;
- return NULL;
+ yield = NULL;
+ goto out;
}
- }
/* Handle a host name */
else
{
- int type = (af == AF_INET)? T_A:T_AAAA;
- int rc = dns_lookup_timerwrap(&dnsa, lname, type, NULL);
+ int type = af == AF_INET ? T_A:T_AAAA;
+ int rc = dns_lookup_timerwrap(dnsa, lname, type, NULL);
int count = 0;
lookup_dnssec_authenticated = NULL;
switch(rc)
{
case DNS_SUCCEED: break;
- case DNS_NOMATCH: *error_num = HOST_NOT_FOUND; return NULL;
- case DNS_NODATA: *error_num = NO_DATA; return NULL;
- case DNS_AGAIN: *error_num = TRY_AGAIN; return NULL;
+ case DNS_NOMATCH: *error_num = HOST_NOT_FOUND; yield = NULL; goto out;
+ case DNS_NODATA: *error_num = NO_DATA; yield = NULL; goto out;
+ case DNS_AGAIN: *error_num = TRY_AGAIN; yield = NULL; goto out;
default:
- case DNS_FAIL: *error_num = NO_RECOVERY; return NULL;
+ case DNS_FAIL: *error_num = NO_RECOVERY; yield = NULL; goto out;
}
- for (rr = dns_next_rr(&dnsa, &dnss, RESET_ANSWERS);
+ for (dns_record * rr = dns_next_rr(dnsa, &dnss, RESET_ANSWERS);
rr;
- rr = dns_next_rr(&dnsa, &dnss, RESET_NEXT))
- if (rr->type == type)
- count++;
+ rr = dns_next_rr(dnsa, &dnss, RESET_NEXT)) if (rr->type == type)
+ count++;
- yield = store_get(sizeof(struct hostent));
- alist = store_get((count + 1) * sizeof(char *));
- adds = store_get(count *alen);
+ yield = store_get(sizeof(struct hostent), FALSE);
+ alist = store_get((count + 1) * sizeof(char *), FALSE);
+ adds = store_get(count *alen, FALSE);
yield->h_name = CS name;
yield->h_aliases = NULL;
yield->h_length = alen;
yield->h_addr_list = CSS alist;
- for (rr = dns_next_rr(&dnsa, &dnss, RESET_ANSWERS);
+ for (dns_record * rr = dns_next_rr(dnsa, &dnss, RESET_ANSWERS);
rr;
- rr = dns_next_rr(&dnsa, &dnss, RESET_NEXT))
+ rr = dns_next_rr(dnsa, &dnss, RESET_NEXT)) if (rr->type == type)
{
- int i, n;
int x[4];
dns_address *da;
- if (rr->type != type) continue;
- if (!(da = dns_address_from_rr(&dnsa, rr))) break;
+ if (!(da = dns_address_from_rr(dnsa, rr))) break;
*alist++ = adds;
- n = host_aton(da->address, x);
- for (i = 0; i < n; i++)
+ for (int n = host_aton(da->address, x), i = 0; i < n; i++)
{
int y = x[i];
*adds++ = (y >> 24) & 255;
*alist = NULL;
}
+out:
+
+store_free_dns_answer(dnsa);
return yield;
}
int fake_mx = MX_NONE; /* This value is actually -1 */
uschar *name;
-if (list == NULL) return;
+if (!list) return;
if (randomize) fake_mx--; /* Start at -2 for randomizing */
*anchor = NULL;
-while ((name = string_nextinlist(&list, &sep, NULL, 0)) != NULL)
+while ((name = string_nextinlist(&list, &sep, NULL, 0)))
{
host_item *h;
continue;
}
- h = store_get(sizeof(host_item));
+ h = store_get(sizeof(host_item), FALSE);
h->name = name;
h->address = NULL;
h->port = PORT_NONE;
h->why = hwhy_unknown;
h->last_try = 0;
- if (*anchor == NULL)
+ if (!*anchor)
{
h->next = NULL;
*anchor = h;
}
else
{
- while (hh->next != NULL && h->sort_key >= (hh->next)->sort_key)
+ while (hh->next && h->sort_key >= hh->next->sort_key)
hh = hh->next;
h->next = hh->next;
hh->next = h;
host_build_sender_fullhost(void)
{
BOOL show_helo = TRUE;
-uschar * address, * fullhost, * rcvhost, * reset_point;
+uschar * address, * fullhost, * rcvhost;
+rmark reset_point;
int len;
if (!sender_host_address) return;
-reset_point = store_get(0);
+reset_point = store_mark();
/* Set up address, with or without the port. After discussion, it seems that
the only format that doesn't cause trouble is [aaaa]:pppp. However, we can't
}
}
-if (sender_fullhost) store_free(sender_fullhost);
-sender_fullhost = string_copy_malloc(fullhost);
-if (sender_rcvhost) store_free(sender_rcvhost);
-sender_rcvhost = string_copy_malloc(rcvhost);
+sender_fullhost = string_copy_perm(fullhost, TRUE);
+sender_rcvhost = string_copy_perm(rcvhost, TRUE);
store_reset(reset_point);
ident set, no host => U=ident
ident set, host set => H=sender_fullhost U=ident
+Use taint-unchecked routines on the assumption we'll never expand the results.
+
Arguments:
useflag TRUE if first item to be flagged (H= or U=); if there are two
items, the second is always flagged
uschar *
host_and_ident(BOOL useflag)
{
-if (sender_fullhost == NULL)
- {
- (void)string_format(big_buffer, big_buffer_size, "%s%s", useflag? "U=" : "",
- (sender_ident == NULL)? US"unknown" : sender_ident);
- }
+if (!sender_fullhost)
+ string_format_nt(big_buffer, big_buffer_size, "%s%s", useflag ? "U=" : "",
+ sender_ident ? sender_ident : US"unknown");
else
{
- uschar *flag = useflag? US"H=" : US"";
- uschar *iface = US"";
- if (LOGGING(incoming_interface) && interface_address != NULL)
+ uschar * flag = useflag ? US"H=" : US"";
+ uschar * iface = US"";
+ if (LOGGING(incoming_interface) && interface_address)
iface = string_sprintf(" I=[%s]:%d", interface_address, interface_port);
- if (sender_ident == NULL)
- (void)string_format(big_buffer, big_buffer_size, "%s%s%s",
- flag, sender_fullhost, iface);
- else
- (void)string_format(big_buffer, big_buffer_size, "%s%s%s U=%s",
+ if (sender_ident)
+ string_format_nt(big_buffer, big_buffer_size, "%s%s%s U=%s",
flag, sender_fullhost, iface, sender_ident);
+ else
+ string_format_nt(big_buffer, big_buffer_size, "%s%s%s",
+ flag, sender_fullhost, iface);
}
return big_buffer;
}
int sep = 0;
uschar *s;
ip_address_item * yield = NULL, * last = NULL, * next;
+BOOL taint = is_tainted(list);
while ((s = string_nextinlist(&list, &sep, NULL, 0)))
{
address above. The field in the ip_address_item is large enough to hold an
IPv6 address. */
- next = store_get(sizeof(ip_address_item));
+ next = store_get(sizeof(ip_address_item), taint);
next->next = NULL;
Ustrcpy(next->address, s);
next->port = port;
next->v6_include_v4 = FALSE;
+ next->log = NULL;
if (!yield)
yield = last = next;
add_unique_interface(ip_address_item *list, ip_address_item *ipa)
{
ip_address_item *ipa2;
-for (ipa2 = list; ipa2 != NULL; ipa2 = ipa2->next)
+for (ipa2 = list; ipa2; ipa2 = ipa2->next)
if (Ustrcmp(ipa2->address, ipa->address) == 0) return list;
-ipa2 = store_get_perm(sizeof(ip_address_item));
+ipa2 = store_get_perm(sizeof(ip_address_item), FALSE);
*ipa2 = *ipa;
ipa2->next = list;
return ipa2;
{
ip_address_item *running_interfaces = NULL;
-if (local_interface_data == NULL)
+if (!local_interface_data)
{
- void *reset_item = store_get(0);
+ void *reset_item = store_mark();
ip_address_item *dlist = host_build_ifacelist(CUS local_interfaces,
US"local_interfaces");
ip_address_item *xlist = host_build_ifacelist(CUS extra_local_interfaces,
US"extra_local_interfaces");
ip_address_item *ipa;
- if (dlist == NULL) dlist = xlist; else
+ if (!dlist) dlist = xlist;
+ else
{
- for (ipa = dlist; ipa->next != NULL; ipa = ipa->next);
+ for (ipa = dlist; ipa->next; ipa = ipa->next) ;
ipa->next = xlist;
}
- for (ipa = dlist; ipa != NULL; ipa = ipa->next)
+ for (ipa = dlist; ipa; ipa = ipa->next)
{
if (Ustrcmp(ipa->address, "0.0.0.0") == 0 ||
Ustrcmp(ipa->address, "::0") == 0)
{
- ip_address_item *ipa2;
BOOL ipv6 = ipa->address[0] == ':';
- if (running_interfaces == NULL)
+ if (!running_interfaces)
running_interfaces = os_find_running_interfaces();
- for (ipa2 = running_interfaces; ipa2 != NULL; ipa2 = ipa2->next)
- {
+ for (ip_address_item * ipa2 = running_interfaces; ipa2; ipa2 = ipa2->next)
if ((Ustrchr(ipa2->address, ':') != NULL) == ipv6)
local_interface_data = add_unique_interface(local_interface_data,
- ipa2);
- }
+ ipa2);
}
else
{
/* If there is no buffer, put the string into some new store. */
-if (buffer == NULL) return string_copy(yield);
+if (!buffer) buffer = store_get(46, FALSE);
/* Callers of this function with a non-NULL buffer must ensure that it is
large enough to hold an IPv6 address, namely, at least 46 bytes. That's what
-makes this use of strcpy() OK. */
+makes this use of strcpy() OK.
+If the library returned apparently an apparently tainted string, clean it;
+we trust IP addresses. */
-Ustrcpy(buffer, yield);
+string_format_nt(buffer, 46, "%s", yield);
return buffer;
}
void
host_mask(int count, int *binary, int mask)
{
-int i;
if (mask < 0) mask = 99999;
-for (i = 0; i < count; i++)
+for (int i = 0; i < count; i++)
{
int wordmask;
if (mask == 0) wordmask = 0;
int
host_nmtoa(int count, int *binary, int mask, uschar *buffer, int sep)
{
-int i, j;
+int j;
uschar *tt = buffer;
if (count == 1)
{
j = binary[0];
- for (i = 24; i >= 0; i -= 8)
+ for (int i = 24; i >= 0; i -= 8)
tt += sprintf(CS tt, "%d.", (j >> i) & 255);
}
else
- for (i = 0; i < 4; i++)
+ for (int i = 0; i < 4; i++)
{
j = binary[i];
tt += sprintf(CS tt, "%04x%c%04x%c", (j >> 16) & 0xffff, sep, j & 0xffff, sep);
c++;
}
-c[-1] = '\0'; /* drop trailing colon */
+*--c = '\0'; /* drop trailing colon */
-/* debug_printf("%s: D k %d <%s> <%s>\n", __FUNCTION__, k, d, d + 2*(k+1)); */
+/* debug_printf("%s: D k %d <%s> <%s>\n", __FUNCTION__, k, buffer, buffer + 2*(k+1)); */
if (k >= 0)
{ /* collapse */
c = d + 2*(k+1);
host_is_tls_on_connect_port(int port)
{
int sep = 0;
-uschar buffer[32];
-const uschar *list = tls_in.on_connect_ports;
-uschar *s;
-uschar *end;
+const uschar * list = tls_in.on_connect_ports;
if (tls_in.on_connect) return TRUE;
-while ((s = string_nextinlist(&list, &sep, buffer, sizeof(buffer))))
+for (uschar * s, * end; s = string_nextinlist(&list, &sep, NULL, 0); )
if (Ustrtol(s, &end, 10) == port)
return TRUE;
BOOL
host_is_in_net(const uschar *host, const uschar *net, int maskoffset)
{
-int i;
int address[4];
int incoming[4];
int mlen;
/* Else do the masked comparison. */
-for (i = 0; i < size; i++)
+for (int i = 0; i < size; i++)
{
int mask;
if (mlen == 0) mask = 0;
if (h->address != NULL)
{
- ip_address_item *ip;
if (Ustrcmp(h->address, "0.0.0.0") == 0) goto FOUND_LOCAL;
- for (ip = local_interface_data; ip != NULL; ip = ip->next)
+ for (ip_address_item * ip = local_interface_data; ip; ip = ip->next)
if (Ustrcmp(h->address, ip->address) == 0) goto FOUND_LOCAL;
yield = HOST_FOUND; /* At least one remote address has been found */
}
static int
host_name_lookup_byaddr(void)
{
-int len;
-uschar *s, *t;
-struct hostent *hosts;
+struct hostent * hosts;
struct in_addr addr;
unsigned long time_msec = 0; /* init to quieten dumb static analysis */
if ( slow_lookup_log
&& (time_msec = get_time_in_ms() - time_msec) > slow_lookup_log
)
- log_long_lookup(US"name", sender_host_address, time_msec);
+ log_long_lookup(US"gethostbyaddr", sender_host_address, time_msec);
/* Failed to look up the host. */
-if (hosts == NULL)
+if (!hosts)
{
HDEBUG(D_host_lookup) debug_printf("IP address lookup failed: h_errno=%d\n",
h_errno);
treat this as non-existent. In some operating systems, this is returned as an
empty string; in others as a single dot. */
-if (hosts->h_name == NULL || hosts->h_name[0] == 0 || hosts->h_name[0] == '.')
+if (!hosts->h_name || !hosts->h_name[0] || hosts->h_name[0] == '.')
{
HDEBUG(D_host_lookup) debug_printf("IP address lookup yielded an empty name: "
"treated as non-existent host name\n");
/* Copy and lowercase the name, which is in static storage in many systems.
Put it in permanent memory. */
-s = US hosts->h_name;
-len = Ustrlen(s) + 1;
-t = sender_host_name = store_get_perm(len);
-while (*s != 0) *t++ = tolower(*s++);
-*t = 0;
+ {
+ int old_pool = store_pool;
+ store_pool = POOL_TAINT_PERM; /* names are tainted */
-/* If the host has aliases, build a copy of the alias list */
+ sender_host_name = string_copylc(US hosts->h_name);
-if (hosts->h_aliases != NULL)
- {
- int count = 1;
- uschar **aliases, **ptr;
- for (aliases = USS hosts->h_aliases; *aliases != NULL; aliases++) count++;
- ptr = sender_host_aliases = store_get_perm(count * sizeof(uschar *));
- for (aliases = USS hosts->h_aliases; *aliases != NULL; aliases++)
- {
- uschar *s = *aliases;
- int len = Ustrlen(s) + 1;
- uschar *t = *ptr++ = store_get_perm(len);
- while (*s != 0) *t++ = tolower(*s++);
- *t = 0;
- }
- *ptr = NULL;
+ /* If the host has aliases, build a copy of the alias list */
+
+ if (hosts->h_aliases)
+ {
+ int count = 1; /* need 1 more for terminating NULL */
+ uschar **ptr;
+
+ for (uschar ** aliases = USS hosts->h_aliases; *aliases; aliases++) count++;
+ store_pool = POOL_PERM;
+ ptr = sender_host_aliases = store_get(count * sizeof(uschar *), FALSE);
+ store_pool = POOL_TAINT_PERM;
+
+ for (uschar ** aliases = USS hosts->h_aliases; *aliases; aliases++)
+ *ptr++ = string_copylc(*aliases);
+ *ptr = NULL;
+ }
+ store_pool = old_pool;
}
return OK;
{
int old_pool, rc;
int sep = 0;
-uschar *hname, *save_hostname;
+uschar *save_hostname;
uschar **aliases;
-uschar buffer[256];
uschar *ordername;
const uschar *list = host_lookup_order;
-dns_record *rr;
-dns_answer dnsa;
+dns_answer * dnsa = store_get_dns_answer();
dns_scan dnss;
sender_host_dnssec = host_lookup_deferred = host_lookup_failed = FALSE;
/* Do lookups directly in the DNS or via gethostbyaddr() (or equivalent), in
the order specified by the host_lookup_order option. */
-while ((ordername = string_nextinlist(&list, &sep, buffer, sizeof(buffer))))
+while ((ordername = string_nextinlist(&list, &sep, NULL, 0)))
{
if (strcmpic(ordername, US"bydns") == 0)
{
+ uschar * name = dns_build_reverse(sender_host_address);
+
dns_init(FALSE, FALSE, FALSE); /* dnssec ctrl by dns_dnssec_ok glbl */
- dns_build_reverse(sender_host_address, buffer);
- rc = dns_lookup_timerwrap(&dnsa, buffer, T_PTR, NULL);
+ rc = dns_lookup_timerwrap(dnsa, name, T_PTR, NULL);
/* The first record we come across is used for the name; others are
considered to be aliases. We have to scan twice, in order to find out the
{
uschar **aptr = NULL;
int ssize = 264;
- int count = 0;
+ int count = 1; /* need 1 more for terminating NULL */
int old_pool = store_pool;
- sender_host_dnssec = dns_is_secure(&dnsa);
+ sender_host_dnssec = dns_is_secure(dnsa);
DEBUG(D_dns)
debug_printf("Reverse DNS security status: %s\n",
sender_host_dnssec ? "DNSSEC verified (AD)" : "unverified");
store_pool = POOL_PERM; /* Save names in permanent storage */
- for (rr = dns_next_rr(&dnsa, &dnss, RESET_ANSWERS);
+ for (dns_record * rr = dns_next_rr(dnsa, &dnss, RESET_ANSWERS);
rr;
- rr = dns_next_rr(&dnsa, &dnss, RESET_NEXT))
- if (rr->type == T_PTR)
- count++;
+ rr = dns_next_rr(dnsa, &dnss, RESET_NEXT)) if (rr->type == T_PTR)
+ count++;
/* Get store for the list of aliases. For compatibility with
gethostbyaddr, we make an empty list if there are none. */
- aptr = sender_host_aliases = store_get(count * sizeof(uschar *));
+ aptr = sender_host_aliases = store_get(count * sizeof(uschar *), FALSE);
/* Re-scan and extract the names */
- for (rr = dns_next_rr(&dnsa, &dnss, RESET_ANSWERS);
+ for (dns_record * rr = dns_next_rr(dnsa, &dnss, RESET_ANSWERS);
rr;
- rr = dns_next_rr(&dnsa, &dnss, RESET_NEXT))
+ rr = dns_next_rr(dnsa, &dnss, RESET_NEXT)) if (rr->type == T_PTR)
{
- uschar *s = NULL;
- if (rr->type != T_PTR) continue;
- s = store_get(ssize);
+ uschar * s = store_get(ssize, TRUE); /* names are tainted */
/* If an overlong response was received, the data will have been
truncated and dn_expand may fail. */
- if (dn_expand(dnsa.answer, dnsa.answer + dnsa.answerlen,
+ if (dn_expand(dnsa->answer, dnsa->answer + dnsa->answerlen,
US (rr->data), (DN_EXPAND_ARG4_TYPE)(s), ssize) < 0)
{
log_write(0, LOG_MAIN, "host name alias list truncated for %s",
break;
}
- store_reset(s + Ustrlen(s) + 1);
- if (s[0] == 0)
+ store_release_above(s + Ustrlen(s) + 1);
+ if (!s[0])
{
HDEBUG(D_host_lookup) debug_printf("IP address lookup yielded an "
"empty name: treated as non-existent host name\n");
}
if (!sender_host_name) sender_host_name = s;
else *aptr++ = s;
- while (*s != 0) { *s = tolower(*s); s++; }
+ while (*s) { *s = tolower(*s); s++; }
}
*aptr = NULL; /* End of alias list */
store_pool = old_pool; /* Reset store pool */
- /* If we've found a names, break out of the "order" loop */
+ /* If we've found a name, break out of the "order" loop */
- if (sender_host_name != NULL) break;
+ if (sender_host_name) break;
}
/* If the DNS lookup deferred, we must also defer. */
save_hostname = sender_host_name; /* Save for error messages */
aliases = sender_host_aliases;
-for (hname = sender_host_name; hname; hname = *aliases++)
+for (uschar * hname = sender_host_name; hname; hname = *aliases++)
{
int rc;
BOOL ok = FALSE;
|| rc == HOST_FOUND_LOCAL
)
{
- host_item *hh;
HDEBUG(D_host_lookup) debug_printf("checking addresses for %s\n", hname);
/* If the forward lookup was not secure we cancel the is-secure variable */
h.dnssec == DS_YES ? "DNSSEC verified (AD)" : "unverified");
if (h.dnssec != DS_YES) sender_host_dnssec = FALSE;
- for (hh = &h; hh; hh = hh->next)
+ for (host_item * hh = &h; hh; hh = hh->next)
if (host_is_in_net(hh->address, sender_host_address, 0))
{
HDEBUG(D_host_lookup) debug_printf(" %s OK\n", hh->address);
host_find_byname(host_item *host, const uschar *ignore_target_hosts, int flags,
const uschar **fully_qualified_name, BOOL local_host_check)
{
-int i, yield, times;
-uschar **addrlist;
+int yield, times;
host_item *last = NULL;
BOOL temp_error = FALSE;
-#if HAVE_IPV6
int af;
+
+#ifndef DISABLE_TLS
+/* Copy the host name at this point to the value which is used for
+TLS certificate name checking, before anything modifies it. */
+
+host->certname = host->name;
#endif
/* Make sure DNS options are set as required. This appears to be necessary in
#ifdef STAND_ALONE
if (disable_ipv6)
#else
- if (disable_ipv6 ||
- (dns_ipv4_lookup != NULL &&
- match_isinlist(host->name, CUSS &dns_ipv4_lookup, 0, NULL, NULL,
- MCL_DOMAIN, TRUE, NULL) == OK))
+ if ( disable_ipv6
+ || dns_ipv4_lookup
+ && match_isinlist(host->name, CUSS &dns_ipv4_lookup, 0,
+ &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)
#endif
{ af = AF_INET; times = 1; }
/* No IPv6 support */
#else /* HAVE_IPV6 */
- times = 1;
+ af = AF_INET; times = 1;
#endif /* HAVE_IPV6 */
/* Initialize the flag that gets set for DNS syntax check errors, so that the
/* Loop to look up both kinds of address in an IPv6 world */
-for (i = 1; i <= times;
+for (int i = 1; i <= times;
#if HAVE_IPV6
af = AF_INET, /* If 2 passes, IPv4 on the second */
#endif
#else /* not HAVE_IPV6 */
if (f.running_in_test_harness)
- hostdata = host_fake_gethostbyname(host->name, AF_INET, &error_num);
+ hostdata = host_fake_gethostbyname(host->name, af, &error_num);
else
{
hostdata = gethostbyname(CS host->name);
if ( slow_lookup_log
&& (time_msec = get_time_in_ms() - time_msec) > slow_lookup_log)
- log_long_lookup(US"name", host->name, time_msec);
+ log_long_lookup(US"gethostbyname", host->name, time_msec);
- if (hostdata == NULL)
+ if (!hostdata)
{
- uschar *error;
+ uschar * error;
switch (error_num)
{
- case HOST_NOT_FOUND: error = US"HOST_NOT_FOUND"; break;
- case TRY_AGAIN: error = US"TRY_AGAIN"; break;
- case NO_RECOVERY: error = US"NO_RECOVERY"; break;
- case NO_DATA: error = US"NO_DATA"; break;
- #if NO_DATA != NO_ADDRESS
- case NO_ADDRESS: error = US"NO_ADDRESS"; break;
- #endif
+ case HOST_NOT_FOUND: error = US"HOST_NOT_FOUND"; break;
+ case TRY_AGAIN: error = US"TRY_AGAIN"; temp_error = TRUE; break;
+ case NO_RECOVERY: error = US"NO_RECOVERY"; temp_error = TRUE; break;
+ case NO_DATA: error = US"NO_DATA"; break;
+ #if NO_DATA != NO_ADDRESS
+ case NO_ADDRESS: error = US"NO_ADDRESS"; break;
+ #endif
default: error = US"?"; break;
}
- DEBUG(D_host_lookup) debug_printf("%s returned %d (%s)\n",
- #if HAVE_IPV6
- #if HAVE_GETIPNODEBYNAME
- (af == AF_INET6)? "getipnodebyname(af=inet6)" : "getipnodebyname(af=inet)",
- #else
- (af == AF_INET6)? "gethostbyname2(af=inet6)" : "gethostbyname2(af=inet)",
- #endif
- #else
- "gethostbyname",
- #endif
- error_num, error);
+ DEBUG(D_host_lookup) debug_printf("%s(af=%s) returned %d (%s)\n",
+ f.running_in_test_harness ? "host_fake_gethostbyname" :
+#if HAVE_IPV6
+# if HAVE_GETIPNODEBYNAME
+ "getipnodebyname",
+# else
+ "gethostbyname2",
+# endif
+#else
+ "gethostbyname",
+#endif
+ af == AF_INET ? "inet" : "inet6", error_num, error);
- if (error_num == TRY_AGAIN || error_num == NO_RECOVERY) temp_error = TRUE;
continue;
}
- if ((hostdata->h_addr_list)[0] == NULL) continue;
+ if (!(hostdata->h_addr_list)[0]) continue;
/* Replace the name with the fully qualified one if necessary, and fill in
the fully_qualified_name pointer. */
- if (hostdata->h_name[0] != 0 &&
- Ustrcmp(host->name, hostdata->h_name) != 0)
+ if (hostdata->h_name[0] && Ustrcmp(host->name, hostdata->h_name) != 0)
host->name = string_copy_dnsdomain(US hostdata->h_name);
- if (fully_qualified_name != NULL) *fully_qualified_name = host->name;
+ if (fully_qualified_name) *fully_qualified_name = host->name;
/* Get the list of addresses. IPv4 and IPv6 addresses can be distinguished
by their different lengths. Scan the list, ignoring any that are to be
ipv4_addr = hostdata->h_length == sizeof(struct in_addr);
- for (addrlist = USS hostdata->h_addr_list; *addrlist != NULL; addrlist++)
+ for (uschar ** addrlist = USS hostdata->h_addr_list; *addrlist; addrlist++)
{
uschar *text_address =
host_ntoa(ipv4_addr? AF_INET:AF_INET6, *addrlist, NULL, NULL);
#ifndef STAND_ALONE
- if (ignore_target_hosts != NULL &&
- verify_check_this_host(&ignore_target_hosts, NULL, host->name,
- text_address, NULL) == OK)
+ if ( ignore_target_hosts
+ && verify_check_this_host(&ignore_target_hosts, NULL, host->name,
+ text_address, NULL) == OK)
{
DEBUG(D_host_lookup)
debug_printf("ignored host %s [%s]\n", host->name, text_address);
}
#endif
- /* If this is the first address, last == NULL and we put the data in the
+ /* If this is the first address, last is NULL and we put the data in the
original block. */
- if (last == NULL)
+ if (!last)
{
host->address = text_address;
host->port = PORT_NONE;
else
{
- host_item *next = store_get(sizeof(host_item));
+ host_item *next = store_get(sizeof(host_item), FALSE);
next->name = host->name;
+#ifndef DISABLE_TLS
+ next->certname = host->certname;
+#endif
next->mx = host->mx;
next->address = text_address;
next->port = PORT_NONE;
NULL. If temp_error is set, at least one of the lookups gave a temporary error,
so we pass that back. */
-if (host->address == NULL)
+if (!host->address)
{
uschar *msg =
#ifndef STAND_ALONE
- (message_id[0] == 0 && smtp_in != NULL)?
- string_sprintf("no IP address found for host %s (during %s)", host->name,
+ !message_id[0] && smtp_in
+ ? string_sprintf("no IP address found for host %s (during %s)", host->name,
smtp_get_connection_info()) :
#endif
string_sprintf("no IP address found for host %s", host->name);
HDEBUG(D_host_lookup)
{
- const host_item *h;
- if (fully_qualified_name != NULL)
+ if (fully_qualified_name)
debug_printf("fully qualified name = %s\n", *fully_qualified_name);
debug_printf("%s looked up these IP addresses:\n",
#if HAVE_IPV6
"gethostbyname"
#endif
);
- for (h = host; h != last->next; h = h->next)
+ for (const host_item * h = host; h != last->next; h = h->next)
debug_printf(" name=%s address=%s\n", h->name,
- (h->address == NULL)? US"<null>" : h->address);
+ h->address ? h->address : US"<null>");
}
/* Return the found status. */
RETURN_AGAIN:
{
- #ifndef STAND_ALONE
+#ifndef STAND_ALONE
int rc;
const uschar *save = deliver_domain;
deliver_domain = host->name; /* set $domain */
- rc = match_isinlist(host->name, CUSS &dns_again_means_nonexist, 0, NULL, NULL,
- MCL_DOMAIN, TRUE, NULL);
+ rc = match_isinlist(host->name, CUSS &dns_again_means_nonexist, 0,
+ &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL);
deliver_domain = save;
if (rc == OK)
{
"returning HOST_FIND_FAILED\n", host->name);
return HOST_FIND_FAILED;
}
- #endif
+#endif
return HOST_FIND_AGAIN;
}
}
const uschar **fully_qualified_name,
BOOL dnssec_request, BOOL dnssec_require, int whichrrs)
{
-dns_record *rr;
host_item *thishostlast = NULL; /* Indicates not yet filled in anything */
BOOL v6_find_again = FALSE;
BOOL dnssec_fail = FALSE;
int i;
+dns_answer * dnsa;
+
+#ifndef DISABLE_TLS
+/* Copy the host name at this point to the value which is used for
+TLS certificate name checking, before any CNAME-following modifies it. */
+
+host->certname = host->name;
+#endif
/* If allow_ip is set, a name which is an IP address returns that value
as its address. This is used for MX records when allow_mx_to_ip is set, for
return HOST_FOUND;
}
+dnsa = store_get_dns_answer();
+
/* On an IPv6 system, unless IPv6 is disabled, go round the loop up to twice,
looking for AAAA records the first time. However, unless doing standalone
testing, we force an IPv4 lookup if the domain matches dns_ipv4_lookup global.
#ifndef STAND_ALONE
if ( disable_ipv6
|| !(whichrrs & HOST_FIND_BY_AAAA)
- || (dns_ipv4_lookup
- && match_isinlist(host->name, CUSS &dns_ipv4_lookup, 0, NULL, NULL,
- MCL_DOMAIN, TRUE, NULL) == OK)
+ || dns_ipv4_lookup
+ && match_isinlist(host->name, CUSS &dns_ipv4_lookup, 0,
+ &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK
)
i = 0; /* look up A records only */
else
int type = types[i];
int randoffset = i == (whichrrs & HOST_FIND_IPV4_FIRST ? 1 : 0)
? 500 : 0; /* Ensures v6/4 sort order */
- dns_answer dnsa;
dns_scan dnss;
- int rc = dns_lookup_timerwrap(&dnsa, host->name, type, fully_qualified_name);
+ int rc = dns_lookup_timerwrap(dnsa, host->name, type, fully_qualified_name);
lookup_dnssec_authenticated = !dnssec_request ? NULL
- : dns_is_secure(&dnsa) ? US"yes" : US"no";
+ : dns_is_secure(dnsa) ? US"yes" : US"no";
DEBUG(D_dns)
if ( (dnssec_request || dnssec_require)
- && !dns_is_secure(&dnsa)
- && dns_is_aa(&dnsa)
+ && !dns_is_secure(dnsa)
+ && dns_is_aa(dnsa)
)
debug_printf("DNS lookup of %.256s (A/AAAA) requested AD, but got AA\n", host->name);
{
if (i == 0) /* Just tried for an A record, i.e. end of loop */
{
- if (host->address != NULL) return HOST_FOUND; /* AAAA was found */
- if (rc == DNS_AGAIN || rc == DNS_FAIL || v6_find_again)
- return HOST_FIND_AGAIN;
- return HOST_FIND_FAILED; /* DNS_NOMATCH or DNS_NODATA */
+ if (host->address != NULL)
+ i = HOST_FOUND; /* AAAA was found */
+ else if (rc == DNS_AGAIN || rc == DNS_FAIL || v6_find_again)
+ i = HOST_FIND_AGAIN;
+ else
+ i = HOST_FIND_FAILED; /* DNS_NOMATCH or DNS_NODATA */
+ goto out;
}
/* Tried for an AAAA record: remember if this was a temporary
if (dnssec_request)
{
- if (dns_is_secure(&dnsa))
+ if (dns_is_secure(dnsa))
{
DEBUG(D_host_lookup) debug_printf("%s A DNSSEC\n", host->name);
if (host->dnssec == DS_UNK) /* set in host_find_bydns() */
fully_qualified_name = NULL;
- for (rr = dns_next_rr(&dnsa, &dnss, RESET_ANSWERS);
+ for (dns_record * rr = dns_next_rr(dnsa, &dnss, RESET_ANSWERS);
rr;
- rr = dns_next_rr(&dnsa, &dnss, RESET_NEXT))
+ rr = dns_next_rr(dnsa, &dnss, RESET_NEXT)) if (rr->type == type)
{
- if (rr->type == type)
- {
- dns_address *da = dns_address_from_rr(&dnsa, rr);
+ dns_address * da = dns_address_from_rr(dnsa, rr);
- DEBUG(D_host_lookup)
- if (!da) debug_printf("no addresses extracted from A6 RR for %s\n",
- host->name);
+ DEBUG(D_host_lookup)
+ if (!da) debug_printf("no addresses extracted from A6 RR for %s\n",
+ host->name);
- /* This loop runs only once for A and AAAA records, but may run
- several times for an A6 record that generated multiple addresses. */
+ /* This loop runs only once for A and AAAA records, but may run
+ several times for an A6 record that generated multiple addresses. */
- for (; da; da = da->next)
- {
- #ifndef STAND_ALONE
- if (ignore_target_hosts != NULL &&
- verify_check_this_host(&ignore_target_hosts, NULL,
- host->name, da->address, NULL) == OK)
- {
- DEBUG(D_host_lookup)
- debug_printf("ignored host %s [%s]\n", host->name, da->address);
- continue;
- }
- #endif
+ for (; da; da = da->next)
+ {
+ #ifndef STAND_ALONE
+ if (ignore_target_hosts != NULL &&
+ verify_check_this_host(&ignore_target_hosts, NULL,
+ host->name, da->address, NULL) == OK)
+ {
+ DEBUG(D_host_lookup)
+ debug_printf("ignored host %s [%s]\n", host->name, da->address);
+ continue;
+ }
+ #endif
- /* If this is the first address, stick it in the given host block,
- and change the name if the returned RR has a different name. */
+ /* If this is the first address, stick it in the given host block,
+ and change the name if the returned RR has a different name. */
- if (thishostlast == NULL)
- {
- if (strcmpic(host->name, rr->name) != 0)
- host->name = string_copy_dnsdomain(rr->name);
- host->address = da->address;
- host->sort_key = host->mx * 1000 + random_number(500) + randoffset;
- host->status = hstatus_unknown;
- host->why = hwhy_unknown;
- thishostlast = host;
- }
+ if (thishostlast == NULL)
+ {
+ if (strcmpic(host->name, rr->name) != 0)
+ host->name = string_copy_dnsdomain(rr->name);
+ host->address = da->address;
+ host->sort_key = host->mx * 1000 + random_number(500) + randoffset;
+ host->status = hstatus_unknown;
+ host->why = hwhy_unknown;
+ thishostlast = host;
+ }
- /* Not the first address. Check for, and ignore, duplicates. Then
- insert in the chain at a random point. */
+ /* Not the first address. Check for, and ignore, duplicates. Then
+ insert in the chain at a random point. */
- else
- {
- int new_sort_key;
- host_item *next;
-
- /* End of our local chain is specified by "thishostlast". */
-
- for (next = host;; next = next->next)
- {
- if (Ustrcmp(CS da->address, next->address) == 0) break;
- if (next == thishostlast) { next = NULL; break; }
- }
- if (next != NULL) continue; /* With loop for next address */
-
- /* Not a duplicate */
-
- new_sort_key = host->mx * 1000 + random_number(500) + randoffset;
- next = store_get(sizeof(host_item));
-
- /* New address goes first: insert the new block after the first one
- (so as not to disturb the original pointer) but put the new address
- in the original block. */
-
- if (new_sort_key < host->sort_key)
- {
- *next = *host; /* Copies port */
- host->next = next;
- host->address = da->address;
- host->sort_key = new_sort_key;
- if (thishostlast == host) thishostlast = next; /* Local last */
- if (*lastptr == host) *lastptr = next; /* Global last */
- }
-
- /* Otherwise scan down the addresses for this host to find the
- one to insert after. */
-
- else
- {
- host_item *h = host;
- while (h != thishostlast)
- {
- if (new_sort_key < h->next->sort_key) break;
- h = h->next;
- }
- *next = *h; /* Copies port */
- h->next = next;
- next->address = da->address;
- next->sort_key = new_sort_key;
- if (h == thishostlast) thishostlast = next; /* Local last */
- if (h == *lastptr) *lastptr = next; /* Global last */
- }
- }
- }
+ else
+ {
+ int new_sort_key;
+ host_item *next;
+
+ /* End of our local chain is specified by "thishostlast". */
+
+ for (next = host;; next = next->next)
+ {
+ if (Ustrcmp(CS da->address, next->address) == 0) break;
+ if (next == thishostlast) { next = NULL; break; }
+ }
+ if (next != NULL) continue; /* With loop for next address */
+
+ /* Not a duplicate */
+
+ new_sort_key = host->mx * 1000 + random_number(500) + randoffset;
+ next = store_get(sizeof(host_item), FALSE);
+
+ /* New address goes first: insert the new block after the first one
+ (so as not to disturb the original pointer) but put the new address
+ in the original block. */
+
+ if (new_sort_key < host->sort_key)
+ {
+ *next = *host; /* Copies port */
+ host->next = next;
+ host->address = da->address;
+ host->sort_key = new_sort_key;
+ if (thishostlast == host) thishostlast = next; /* Local last */
+ if (*lastptr == host) *lastptr = next; /* Global last */
+ }
+
+ /* Otherwise scan down the addresses for this host to find the
+ one to insert after. */
+
+ else
+ {
+ host_item *h = host;
+ while (h != thishostlast)
+ {
+ if (new_sort_key < h->next->sort_key) break;
+ h = h->next;
+ }
+ *next = *h; /* Copies port */
+ h->next = next;
+ next->address = da->address;
+ next->sort_key = new_sort_key;
+ if (h == thishostlast) thishostlast = next; /* Local last */
+ if (h == *lastptr) *lastptr = next; /* Global last */
+ }
+ }
}
}
}
/* Control gets here only if the second lookup (the A record) succeeded.
However, the address may not be filled in if it was ignored. */
-return host->address
+i = host->address
? HOST_FOUND
: dnssec_fail
? HOST_FIND_SECURITY
: HOST_IGNORED;
+
+out:
+ store_free_dns_answer(dnsa);
+ return i;
}
const uschar **fully_qualified_name, BOOL *removed)
{
host_item *h, *last;
-dns_record *rr;
int rc = DNS_FAIL;
int ind_type = 0;
int yield;
-dns_answer dnsa;
+dns_answer * dnsa = store_get_dns_answer();
dns_scan dnss;
BOOL dnssec_require = dnssec_d
- && match_isinlist(host->name, CUSS &dnssec_d->require,
- 0, NULL, NULL, MCL_DOMAIN, TRUE, NULL) == OK;
+ && match_isinlist(host->name, CUSS &dnssec_d->require,
+ 0, &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK;
BOOL dnssec_request = dnssec_require
- || ( dnssec_d
- && match_isinlist(host->name, CUSS &dnssec_d->request,
- 0, NULL, NULL, MCL_DOMAIN, TRUE, NULL) == OK);
+ || ( dnssec_d
+ && match_isinlist(host->name, CUSS &dnssec_d->request,
+ 0, &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK);
dnssec_status_t dnssec;
/* Set the default fully qualified name to the incoming name, initialize the
dnssec = DS_UNK;
lookup_dnssec_authenticated = NULL;
- rc = dns_lookup_timerwrap(&dnsa, temp_fully_qualified_name, ind_type,
+ rc = dns_lookup_timerwrap(dnsa, temp_fully_qualified_name, ind_type,
CUSS &temp_fully_qualified_name);
DEBUG(D_dns)
if ((dnssec_request || dnssec_require)
- && !dns_is_secure(&dnsa)
- && dns_is_aa(&dnsa))
+ && !dns_is_secure(dnsa)
+ && dns_is_aa(dnsa))
debug_printf("DNS lookup of %.256s (SRV) requested AD, but got AA\n", host->name);
if (dnssec_request)
{
- if (dns_is_secure(&dnsa))
+ if (dns_is_secure(dnsa))
{ dnssec = DS_YES; lookup_dnssec_authenticated = US"yes"; }
else
{ dnssec = DS_NO; lookup_dnssec_authenticated = US"no"; }
/* On DNS failures, we give the "try again" error unless the domain is
listed as one for which we continue. */
- if (rc == DNS_SUCCEED && dnssec_require && !dns_is_secure(&dnsa))
+ if (rc == DNS_SUCCEED && dnssec_require && !dns_is_secure(dnsa))
{
log_write(L_host_lookup_failed, LOG_MAIN,
"dnssec fail on SRV for %.256s", host->name);
}
if (rc == DNS_FAIL || rc == DNS_AGAIN)
{
- #ifndef STAND_ALONE
- if (match_isinlist(host->name, CUSS &srv_fail_domains, 0, NULL, NULL,
- MCL_DOMAIN, TRUE, NULL) != OK)
- #endif
+#ifndef STAND_ALONE
+ if (match_isinlist(host->name, CUSS &srv_fail_domains, 0,
+ &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) != OK)
+#endif
{ yield = HOST_FIND_AGAIN; goto out; }
DEBUG(D_host_lookup) debug_printf("DNS_%s treated as DNS_NODATA "
- "(domain in srv_fail_domains)\n", (rc == DNS_FAIL)? "FAIL":"AGAIN");
+ "(domain in srv_fail_domains)\n", rc == DNS_FAIL ? "FAIL":"AGAIN");
}
}
ind_type = T_MX;
dnssec = DS_UNK;
lookup_dnssec_authenticated = NULL;
- rc = dns_lookup_timerwrap(&dnsa, host->name, ind_type, fully_qualified_name);
+ rc = dns_lookup_timerwrap(dnsa, host->name, ind_type, fully_qualified_name);
DEBUG(D_dns)
if ( (dnssec_request || dnssec_require)
- && !dns_is_secure(&dnsa)
- && dns_is_aa(&dnsa))
+ && !dns_is_secure(dnsa)
+ && dns_is_aa(dnsa))
debug_printf("DNS lookup of %.256s (MX) requested AD, but got AA\n", host->name);
if (dnssec_request)
- if (dns_is_secure(&dnsa))
+ if (dns_is_secure(dnsa))
{
- DEBUG(D_host_lookup) debug_printf("%s MX DNSSEC\n", host->name);
+ DEBUG(D_host_lookup) debug_printf("%s (MX resp) DNSSEC\n", host->name);
dnssec = DS_YES; lookup_dnssec_authenticated = US"yes";
}
else
yield = HOST_FIND_FAILED; goto out;
case DNS_SUCCEED:
- if (!dnssec_require || dns_is_secure(&dnsa))
+ if (!dnssec_require || dns_is_secure(dnsa))
break;
DEBUG(D_host_lookup)
debug_printf("dnssec fail on MX for %.256s", host->name);
#ifndef STAND_ALONE
- if (match_isinlist(host->name, CUSS &mx_fail_domains, 0, NULL, NULL,
- MCL_DOMAIN, TRUE, NULL) != OK)
+ if (match_isinlist(host->name, CUSS &mx_fail_domains, 0,
+ &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) != OK)
{ yield = HOST_FIND_SECURITY; goto out; }
#endif
rc = DNS_FAIL;
case DNS_FAIL:
case DNS_AGAIN:
#ifndef STAND_ALONE
- if (match_isinlist(host->name, CUSS &mx_fail_domains, 0, NULL, NULL,
- MCL_DOMAIN, TRUE, NULL) != OK)
+ if (match_isinlist(host->name, CUSS &mx_fail_domains, 0,
+ &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) != OK)
#endif
{ yield = HOST_FIND_AGAIN; goto out; }
DEBUG(D_host_lookup) debug_printf("DNS_%s treated as DNS_NODATA "
if (rc == HOST_IGNORED) rc = HOST_FIND_FAILED; /* No special action */
DEBUG(D_host_lookup)
- {
- host_item *h;
- if (host->address != NULL)
+ if (host->address)
{
- if (fully_qualified_name != NULL)
+ if (fully_qualified_name)
debug_printf("fully qualified name = %s\n", *fully_qualified_name);
- for (h = host; h != last->next; h = h->next)
+ for (host_item * h = host; h != last->next; h = h->next)
debug_printf("%s %s mx=%d sort=%d %s\n", h->name,
- (h->address == NULL)? US"<null>" : h->address, h->mx, h->sort_key,
- (h->status >= hstatus_unusable)? US"*" : US"");
+ h->address ? h->address : US"<null>", h->mx, h->sort_key,
+ h->status >= hstatus_unusable ? US"*" : US"");
}
- }
yield = rc;
goto out;
last = NULL; /* Indicates that not even the first item is filled yet */
-for (rr = dns_next_rr(&dnsa, &dnss, RESET_ANSWERS);
+for (dns_record * rr = dns_next_rr(dnsa, &dnss, RESET_ANSWERS);
rr;
- rr = dns_next_rr(&dnsa, &dnss, RESET_NEXT)) if (rr->type == ind_type)
+ rr = dns_next_rr(dnsa, &dnss, RESET_NEXT)) if (rr->type == ind_type)
{
int precedence, weight;
int port = PORT_NONE;
/* Get the name of the host pointed to. */
- (void)dn_expand(dnsa.answer, dnsa.answer + dnsa.answerlen, s,
+ (void)dn_expand(dnsa->answer, dnsa->answer + dnsa->answerlen, s,
(DN_EXPAND_ARG4_TYPE)data, sizeof(data));
/* Check that we haven't already got this host on the chain; if we have,
/* Make a new host item and seek the correct insertion place */
{
int sort_key = precedence * 1000 + weight;
- host_item *next = store_get(sizeof(host_item));
+ host_item *next = store_get(sizeof(host_item), FALSE);
next->name = string_copy_dnsdomain(data);
next->address = NULL;
next->port = port;
if (ind_type == T_SRV)
{
- host_item **pptr;
+ host_item ** pptr;
if (host == last && host->name[0] == 0)
{
DEBUG(D_host_lookup)
{
- if (fully_qualified_name != NULL)
+ if (fully_qualified_name)
debug_printf("fully qualified name = %s\n", *fully_qualified_name);
debug_printf("host_find_bydns yield = %s (%d); returned hosts:\n",
- (yield == HOST_FOUND)? "HOST_FOUND" :
- (yield == HOST_FOUND_LOCAL)? "HOST_FOUND_LOCAL" :
- (yield == HOST_FIND_SECURITY)? "HOST_FIND_SECURITY" :
- (yield == HOST_FIND_AGAIN)? "HOST_FIND_AGAIN" :
- (yield == HOST_FIND_FAILED)? "HOST_FIND_FAILED" : "?",
+ yield == HOST_FOUND ? "HOST_FOUND" :
+ yield == HOST_FOUND_LOCAL ? "HOST_FOUND_LOCAL" :
+ yield == HOST_FIND_SECURITY ? "HOST_FIND_SECURITY" :
+ yield == HOST_FIND_AGAIN ? "HOST_FIND_AGAIN" :
+ yield == HOST_FIND_FAILED ? "HOST_FIND_FAILED" : "?",
yield);
for (h = host; h != last->next; h = h->next)
{
out:
dns_init(FALSE, FALSE, FALSE); /* clear the dnssec bit for getaddrbyname */
+store_free_dns_answer(dnsa);
return yield;
}
+
+
+
+#ifdef SUPPORT_DANE
+/* Lookup TLSA record for host/port.
+Return: OK success with dnssec; DANE mode
+ DEFER Do not use this host now, may retry later
+ FAIL_FORCED No TLSA record; DANE not usable
+ FAIL Do not use this connection
+*/
+
+int
+tlsa_lookup(const host_item * host, dns_answer * dnsa, BOOL dane_required)
+{
+uschar buffer[300];
+const uschar * fullname = buffer;
+int rc;
+BOOL sec;
+
+/* TLSA lookup string */
+(void)sprintf(CS buffer, "_%d._tcp.%.256s", host->port, host->name);
+
+rc = dns_lookup_timerwrap(dnsa, buffer, T_TLSA, &fullname);
+sec = dns_is_secure(dnsa);
+DEBUG(D_transport)
+ debug_printf("TLSA lookup ret %s %sDNSSEC\n", dns_rc_names[rc], sec ? "" : "not ");
+
+switch (rc)
+ {
+ case DNS_AGAIN:
+ return DEFER; /* just defer this TLS'd conn */
+
+ case DNS_SUCCEED:
+ if (sec)
+ {
+ DEBUG(D_transport)
+ {
+ dns_scan dnss;
+ for (dns_record * rr = dns_next_rr(dnsa, &dnss, RESET_ANSWERS); rr;
+ rr = dns_next_rr(dnsa, &dnss, RESET_NEXT))
+ if (rr->type == T_TLSA && rr->size > 3)
+ {
+ uint16_t payload_length = rr->size - 3;
+ uschar s[MAX_TLSA_EXPANDED_SIZE], * sp = s, * p = US rr->data;
+
+ sp += sprintf(CS sp, "%d ", *p++); /* usage */
+ sp += sprintf(CS sp, "%d ", *p++); /* selector */
+ sp += sprintf(CS sp, "%d ", *p++); /* matchtype */
+ while (payload_length-- > 0 && sp-s < (MAX_TLSA_EXPANDED_SIZE - 4))
+ sp += sprintf(CS sp, "%02x", *p++);
+
+ debug_printf(" %s\n", s);
+ }
+ }
+ return OK;
+ }
+ log_write(0, LOG_MAIN,
+ "DANE error: TLSA lookup for %s not DNSSEC", host->name);
+ /*FALLTRHOUGH*/
+
+ case DNS_NODATA: /* no TLSA RR for this lookup */
+ case DNS_NOMATCH: /* no records at all for this lookup */
+ return dane_required ? FAIL : FAIL_FORCED;
+
+ default:
+ case DNS_FAIL:
+ return dane_required ? FAIL : DEFER;
+ }
+}
+#endif /*SUPPORT_DANE*/
+
+
+
/*************************************************
**************************************************
* Stand-alone test program *
disable_ipv6 = FALSE;
primary_hostname = US"";
+store_init();
store_pool = POOL_MAIN;
debug_selector = D_host_lookup|D_interface;
debug_file = stdout;
printf("> ");
while (Ufgets(buffer, 256, stdin) != NULL)
{
- int i;
int x[4];
int len = Ustrlen(buffer);
len = host_aton(buffer, x);
printf("length = %d ", len);
- for (i = 0; i < len; i++)
+ for (int i = 0; i < len; i++)
{
printf("%04x ", (x[i] >> 16) & 0xffff);
printf("%04x ", x[i] & 0xffff);
git://git.exim.org / exim.git / blobdiff