{
vlib_thread_main_t *tm = &vlib_thread_main;
u32 n_vlib_mains = tm->n_vlib_mains;
+ vlib_main_t *vm = dm->vlib_main;
if (is_enable)
{
&& (vec_len (dm->ip6_name_servers) == 0))
return VNET_API_ERROR_NO_NAME_SERVERS;
+ if (dm->udp_ports_registered == 0)
+ {
+ udp_register_dst_port (vm, UDP_DST_PORT_dns_reply,
+ dns46_reply_node.index, 1 /* is_ip4 */ );
+
+ udp_register_dst_port (vm, UDP_DST_PORT_dns_reply6,
+ dns46_reply_node.index, 0 /* is_ip4 */ );
+
+ udp_register_dst_port (vm, UDP_DST_PORT_dns,
+ dns4_request_node.index, 1 /* is_ip4 */ );
+
+ udp_register_dst_port (vm, UDP_DST_PORT_dns6,
+ dns6_request_node.index, 0 /* is_ip4 */ );
+
+ dm->udp_ports_registered = 1;
+ }
+
if (dm->cache_entry_by_name == 0)
{
if (n_vlib_mains > 1)
REPLY_MACRO (VL_API_DNS_NAME_SERVER_ADD_DEL_REPLY);
}
-static void
-send_dns4_request (dns_main_t * dm,
- dns_cache_entry_t * ep, ip4_address_t * server)
+void
+vnet_dns_send_dns4_request (dns_main_t * dm,
+ dns_cache_entry_t * ep, ip4_address_t * server)
{
vlib_main_t *vm = dm->vlib_main;
f64 now = vlib_time_now (vm);
{
clib_warning
("route to %U exists, fei %d, get_resolving_interface returned"
- " ~0", fei, format_ip4_address, &prefix.fp_addr);
+ " ~0", format_ip4_address, &prefix.fp_addr, fei);
return;
}
/* *INDENT-OFF* */
- foreach_ip_interface_address(lm4, ia, sw_if_index, 1 /* honor unnummbered */,
+ foreach_ip_interface_address(lm4, ia, sw_if_index, 1 /* honor unnumbered */,
({
src_address = ip_interface_address_get_address (lm4, ia);
goto found_src_address;
vnet_buffer (b)->sw_if_index[VLIB_TX] = 0; /* default VRF for now */
ip = vlib_buffer_get_current (b);
- memset (ip, 0, sizeof (*ip));
+ clib_memset (ip, 0, sizeof (*ip));
udp = (udp_header_t *) (ip + 1);
- memset (udp, 0, sizeof (*udp));
+ clib_memset (udp, 0, sizeof (*udp));
dns_request = (u8 *) (udp + 1);
ep->retry_timer = now + 2.0;
}
-static void
-send_dns6_request (dns_main_t * dm,
- dns_cache_entry_t * ep, ip6_address_t * server)
+void
+vnet_dns_send_dns6_request (dns_main_t * dm,
+ dns_cache_entry_t * ep, ip6_address_t * server)
{
vlib_main_t *vm = dm->vlib_main;
f64 now = vlib_time_now (vm);
sw_if_index = fib_entry_get_resolving_interface (fei);
/* *INDENT-OFF* */
- foreach_ip_interface_address(lm6, ia, sw_if_index, 1 /* honor unnummbered */,
+ foreach_ip_interface_address(lm6, ia, sw_if_index, 1 /* honor unnumbered */,
({
src_address = ip_interface_address_get_address (lm6, ia);
goto found_src_address;
VLIB_BUFFER_TOTAL_LENGTH_VALID | VNET_BUFFER_F_LOCALLY_ORIGINATED;
ip = vlib_buffer_get_current (b);
- memset (ip, 0, sizeof (*ip));
+ clib_memset (ip, 0, sizeof (*ip));
udp = (udp_header_t *) (ip + 1);
- memset (udp, 0, sizeof (*udp));
+ clib_memset (udp, 0, sizeof (*udp));
dns_request = (u8 *) (udp + 1);
dns_header_t *h;
dns_query_t *qp;
u16 tmp;
- u8 *request;
+ u8 *request, *name_copy;
u32 qp_offset;
/* This can easily happen if sitting in GDB, etc. */
- if (ep->flags & DNS_CACHE_ENTRY_FLAG_VALID)
+ if (ep->flags & DNS_CACHE_ENTRY_FLAG_VALID || ep->server_fails > 1)
return;
/* Construct the dns request, if we haven't been here already */
* per label is 63, enforce that.
*/
request = name_to_labels (ep->name);
+ name_copy = vec_dup (request);
qp_offset = vec_len (request);
+ /*
+ * At least when testing against "known good" DNS servers:
+ * it turns out that sending 2x requests - one for an A-record
+ * and another for a AAAA-record - seems to work better than
+ * sending a DNS_TYPE_ALL request.
+ */
+
/* Add space for the query header */
- vec_validate (request, qp_offset + sizeof (dns_query_t) - 1);
+ vec_validate (request, 2 * qp_offset + 2 * sizeof (dns_query_t) - 1);
qp = (dns_query_t *) (request + qp_offset);
- qp->type = clib_host_to_net_u16 (DNS_TYPE_ALL);
+ qp->type = clib_host_to_net_u16 (DNS_TYPE_A);
+ qp->class = clib_host_to_net_u16 (DNS_CLASS_IN);
+ qp++;
+ clib_memcpy (qp, name_copy, vec_len (name_copy));
+ qp = (dns_query_t *) (((u8 *) qp) + vec_len (name_copy));
+ vec_free (name_copy);
+
+ qp->type = clib_host_to_net_u16 (DNS_TYPE_AAAA);
qp->class = clib_host_to_net_u16 (DNS_CLASS_IN);
/* Punch in space for the dns_header_t */
/* Ask for a recursive lookup */
tmp = DNS_RD | DNS_OPCODE_QUERY;
h->flags = clib_host_to_net_u16 (tmp);
- h->qdcount = clib_host_to_net_u16 (1);
+ h->qdcount = clib_host_to_net_u16 (2);
h->nscount = 0;
h->arcount = 0;
{
if (vec_len (dm->ip6_name_servers))
{
- send_dns6_request (dm, ep,
- dm->ip6_name_servers + ep->server_rotor);
+ vnet_dns_send_dns6_request
+ (dm, ep, dm->ip6_name_servers + ep->server_rotor);
goto out;
}
else
}
if (vec_len (dm->ip4_name_servers))
{
- send_dns4_request (dm, ep, dm->ip4_name_servers + ep->server_rotor);
+ vnet_dns_send_dns4_request
+ (dm, ep, dm->ip4_name_servers + ep->server_rotor);
goto out;
}
}
}
if (ep->server_af == 1 /* ip6 */ )
- send_dns6_request (dm, ep, dm->ip6_name_servers + ep->server_rotor);
+ vnet_dns_send_dns6_request
+ (dm, ep, dm->ip6_name_servers + ep->server_rotor);
else
- send_dns4_request (dm, ep, dm->ip4_name_servers + ep->server_rotor);
+ vnet_dns_send_dns4_request
+ (dm, ep, dm->ip4_name_servers + ep->server_rotor);
out:
}
pool_get (dm->entries, ep);
- memset (ep, 0, sizeof (*ep));
+ clib_memset (ep, 0, sizeof (*ep));
/* Note: consumes the name vector */
ep->name = name;
/* add new hash table entry */
pool_get (dm->entries, ep);
- memset (ep, 0, sizeof (*ep));
+ clib_memset (ep, 0, sizeof (*ep));
ep->name = format (0, "%s%c", name, 0);
_vec_len (ep->name) = vec_len (ep->name) - 1;
dns_rr_t *rr;
u8 *curpos;
u8 *pos, *pos2;
+ u8 *cname_pos = 0;
int len, i;
u8 *cname = 0;
u8 *request = 0;
+ u8 *name_copy;
u32 qp_offset;
u16 flags;
u16 rcode;
case DNS_RCODE_SERVER_FAILURE:
case DNS_RCODE_NOT_IMPLEMENTED:
case DNS_RCODE_REFUSED:
- return 0;
+ return -1;
}
curpos = (u8 *) (h + 1);
else
return 0;
- rr = (dns_rr_t *) pos;
+ /* Walk the answer(s) to see what to do next */
+ for (i = 0; i < clib_net_to_host_u16 (h->anscount); i++)
+ {
+ rr = (dns_rr_t *) pos;
+ switch (clib_net_to_host_u16 (rr->type))
+ {
+ /* Real address record? Done.. */
+ case DNS_TYPE_A:
+ case DNS_TYPE_AAAA:
+ return 0;
+ /*
+ * Maybe chase a CNAME pointer?
+ * It's not unheard-of for name-servers to return
+ * both CNAME and A/AAAA records...
+ */
+ case DNS_TYPE_CNAME:
+ cname_pos = pos;
+ break;
- /* This is a real record, not a CNAME record */
- if (clib_net_to_host_u16 (rr->type) != DNS_TYPE_CNAME)
- return 0;
+ /* Some other junk, e.g. a nameserver... */
+ default:
+ break;
+ }
+ pos += sizeof (*rr) + clib_net_to_host_u16 (rr->rdlength);
+ /* Skip name... */
+ if ((pos2[0] & 0xc0) == 0xc0)
+ pos += 2;
+ }
+
+ /* Neither a CNAME nor a real address. Try another server */
+ if (cname_pos == 0)
+ {
+ flags &= ~DNS_RCODE_MASK;
+ flags |= DNS_RCODE_NAME_ERROR;
+ h->flags = clib_host_to_net_u16 (flags);
+ return -1;
+ }
/* This is a CNAME record, chase the name chain. */
+ pos = cname_pos;
/* The last request is no longer pending.. */
for (i = 0; i < vec_len (dm->unresolved_entries); i++)
ep->cname = cname;
ep->flags |= (DNS_CACHE_ENTRY_FLAG_CNAME | DNS_CACHE_ENTRY_FLAG_VALID);
/* Save the response */
+ if (ep->dns_response)
+ vec_free (ep->dns_response);
ep->dns_response = reply;
/* Set up expiration time */
ep->expiration_time = now + clib_net_to_host_u32 (rr->ttl);
/* Need to recompute ep post pool-get */
ep = pool_elt_at_index (dm->entries, ep_index);
- memset (next_ep, 0, sizeof (*next_ep));
+ clib_memset (next_ep, 0, sizeof (*next_ep));
next_ep->name = vec_dup (cname);
vec_add1 (next_ep->name, 0);
_vec_len (next_ep->name) -= 1;
#undef _
request = name_to_labels (cname);
+ name_copy = vec_dup (request);
qp_offset = vec_len (request);
/* Add space for the query header */
- vec_validate (request, qp_offset + sizeof (dns_query_t) - 1);
+ vec_validate (request, 2 * qp_offset + 2 * sizeof (dns_query_t) - 1);
qp = (dns_query_t *) (request + qp_offset);
- qp->type = clib_host_to_net_u16 (DNS_TYPE_ALL);
+ qp->type = clib_host_to_net_u16 (DNS_TYPE_A);
+ qp->class = clib_host_to_net_u16 (DNS_CLASS_IN);
+ clib_memcpy (qp, name_copy, vec_len (name_copy));
+ qp = (dns_query_t *) (((u8 *) qp) + vec_len (name_copy));
+ vec_free (name_copy);
+
+ qp->type = clib_host_to_net_u16 (DNS_TYPE_AAAA);
qp->class = clib_host_to_net_u16 (DNS_CLASS_IN);
/* Punch in space for the dns_header_t */
/* Ask for a recursive lookup */
h->flags = clib_host_to_net_u16 (DNS_RD | DNS_OPCODE_QUERY);
- h->qdcount = clib_host_to_net_u16 (1);
+ h->qdcount = clib_host_to_net_u16 (2);
h->nscount = 0;
h->arcount = 0;
dm->max_ttl_in_seconds = 86400;
dm->random_seed = 0xDEADDABE;
- udp_register_dst_port (vm, UDP_DST_PORT_dns_reply, dns46_reply_node.index,
- 1 /* is_ip4 */ );
-
- udp_register_dst_port (vm, UDP_DST_PORT_dns_reply6, dns46_reply_node.index,
- 0 /* is_ip4 */ );
-
- udp_register_dst_port (vm, UDP_DST_PORT_dns, dns4_request_node.index,
- 1 /* is_ip4 */ );
-
- udp_register_dst_port (vm, UDP_DST_PORT_dns6, dns6_request_node.index,
- 0 /* is_ip4 */ );
return 0;
}
};
/* *INDENT-ON* */
-#define DNS_FORMAT_TEST 0
+#define DNS_FORMAT_TEST 1
#if DNS_FORMAT_TEST > 0
#if 0
};
/* google.com */
-#else
static u8 dns_reply_data_initializer[] =
{ 0x0, 0x0, 0x81, 0x80, 0x0, 0x1, 0x0, 0xe, 0x0, 0x0, 0x0, 0x0, 0x6,
0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x3, 0x63, 0x6f, 0x6d, 0x0, 0x0, 0xff,
0x57,
0x0, 0x9, 0x0, 0x14, 0x4, 0x61, 0x6c, 0x74, 0x31, 0xc0, 0x9b
};
+
+#else
+/* www.weatherlink.com */
+static u8 dns_reply_data_initializer[] = {
+ 0x00, 0x00, 0x81, 0x80, 0x00, 0x01, 0x00, 0x01,
+ 0x00, 0x00, 0x00, 0x00, 0x03, 0x77, 0x77, 0x77, 0x0b,
+ 0x77, 0x65, 0x61, 0x74, 0x68, 0x65, 0x72, 0x6c, 0x69,
+ 0x6e, 0x6b, 0x03, 0x63, 0x6f, 0x6d, 0x00, 0x00, 0xff,
+ 0x00, 0x01, 0xc0, 0x0c, 0x00, 0x05, 0x00, 0x01, 0x00,
+ 0x00, 0x0c, 0x9e, 0x00, 0x1f, 0x0e, 0x64, 0x33, 0x6b,
+ 0x72, 0x30, 0x67, 0x75, 0x62, 0x61, 0x31, 0x64, 0x76,
+ 0x77, 0x66, 0x0a, 0x63, 0x6c, 0x6f, 0x75, 0x64, 0x66,
+ 0x72, 0x6f, 0x6e, 0x74, 0x03, 0x6e, 0x65, 0x74, 0x00,
+};
+
#endif
static clib_error_t *
vlib_cli_output (vm, "%U", format_dns_reply, dns_reply_data, verbose);
- memset (rmp, 0, sizeof (*rmp));
+ clib_memset (rmp, 0, sizeof (*rmp));
rv = vnet_dns_response_to_reply (dns_reply_data, rmp, 0 /* ttl-ptr */ );
vlib_cli_command_t * cmd)
{
dns_main_t *dm = &dns_main;
- u8 *name;
+ u8 *name = 0;
uword *p;
clib_error_t *e;
dns_cache_entry_t *ep;
vec_add1 (name, 0);
_vec_len (name) -= 1;
}
+ else
+ return clib_error_return (0, "no name provided");
dns_cache_lock (dm);
dns_cache_entry_t * ep, vlib_buffer_t * b0)
{
vlib_main_t *vm = dm->vlib_main;
- u32 bi;
+ u32 bi = 0;
fib_prefix_t prefix;
fib_node_index_t fei;
u32 sw_if_index, fib_index;
if (pr->request_type == DNS_PEER_PENDING_NAME_TO_IP)
{
/* Quick and dirty way to dig up the A-record address. $$ FIXME */
- memset (rnr, 0, sizeof (*rnr));
+ clib_memset (rnr, 0, sizeof (*rnr));
if (vnet_dns_response_to_reply (ep->dns_response, rnr, &ttl))
{
/* clib_warning ("response_to_reply failed..."); */
}
else if (pr->request_type == DNS_PEER_PENDING_IP_TO_NAME)
{
- memset (rir, 0, sizeof (*rir));
+ clib_memset (rir, 0, sizeof (*rir));
if (vnet_dns_response_to_name (ep->dns_response, rir, &ttl))
{
/* clib_warning ("response_to_name failed..."); */
* In the resolution-required / deferred case, resetting a freshly-allocated
* buffer won't hurt. We hope.
*/
- b0->flags &= VLIB_BUFFER_FREE_LIST_INDEX_MASK;
b0->flags |= (VNET_BUFFER_F_LOCALLY_ORIGINATED
| VLIB_BUFFER_TOTAL_LENGTH_VALID);
b0->current_data = 0;
}
/* *INDENT-OFF* */
- foreach_ip_interface_address(lm4, ia, sw_if_index, 1 /* honor unnummbered */,
+ foreach_ip_interface_address(lm4, ia, sw_if_index, 1 /* honor unnumbered */,
({
src_address = ip_interface_address_get_address (lm4, ia);
goto found_src_address;
ip = vlib_buffer_get_current (b0);
udp = (udp_header_t *) (ip + 1);
dns_response = (u8 *) (udp + 1);
- memset (ip, 0, sizeof (*ip) + sizeof (*udp));
+ clib_memset (ip, 0, sizeof (*ip) + sizeof (*udp));
/*
* Start with the variadic portion of the exercise.
Code Review / vpp.git / blobdiff