Enable MDNS lookup from LWIP DNS

Author: earlephilhower

include/lwipopts.h

@@ -21,53 +21,54 @@ extern unsigned long __lwip_rand(void);
 // Common settings used in most of the pico_w examples
 // (see https://www.nongnu.org/lwip/2_1_x/group__lwip__opts.html for details)
 
-#define NO_SYS                      1
-#define LWIP_SOCKET                 0
-#define MEM_LIBC_MALLOC             0
+#define NO_SYS                        1
+#define LWIP_SOCKET                   0
+#define MEM_LIBC_MALLOC               0
 
-#define MEM_ALIGNMENT               4
-#define MEM_SIZE                    (__LWIP_MEMMULT * 16384)
-#define MEMP_NUM_TCP_SEG            (32)
-#define MEMP_NUM_ARP_QUEUE          (10)
-#define PBUF_POOL_SIZE              (__LWIP_MEMMULT > 1 ? 32 : 24)
-#define LWIP_ARP                    2
-#define LWIP_ETHERNET               1
-#define LWIP_ICMP                   1
-#define LWIP_RAW                    1
-#define TCP_WND                     (8 * TCP_MSS)
-#define TCP_MSS                     1460
-#define TCP_SND_BUF                 (8 * TCP_MSS)
-#define TCP_SND_QUEUELEN            ((4 * (TCP_SND_BUF) + (TCP_MSS - 1)) / (TCP_MSS))
-#define LWIP_NETIF_STATUS_CALLBACK  1
-#define LWIP_NETIF_LINK_CALLBACK    1
-#define LWIP_NETIF_HOSTNAME         1
-#define LWIP_NETCONN                0
-#define LWIP_STATS                  0
-#define LWIP_STATS_DISPLAY          0
-#define MEM_STATS                   0
-#define SYS_STATS                   0
-#define MEMP_STATS                  0
-#define LINK_STATS                  0
-#define LWIP_CHKSUM_ALGORITHM       0
-#define LWIP_DHCP                   1
-#define LWIP_IPV4                   1
-#define LWIP_TCP                    1
-#define LWIP_UDP                    1
-#define LWIP_DNS                    1
-#define LWIP_TCP_KEEPALIVE          1
-#define LWIP_NETIF_TX_SINGLE_PBUF   1
-#define DHCP_DOES_ARP_CHECK         0
-#define LWIP_DHCP_DOES_ACD_CHECK    0
-#define LWIP_IGMP                   1
-#define LWIP_MDNS_RESPONDER         1
+#define MEM_ALIGNMENT                 4
+#define MEM_SIZE                      (__LWIP_MEMMULT * 16384)
+#define MEMP_NUM_TCP_SEG              (32)
+#define MEMP_NUM_ARP_QUEUE            (10)
+#define PBUF_POOL_SIZE                (__LWIP_MEMMULT > 1 ? 32 : 24)
+#define LWIP_ARP                      2
+#define LWIP_ETHERNET                 1
+#define LWIP_ICMP                     1
+#define LWIP_RAW                      1
+#define TCP_WND                       (8 * TCP_MSS)
+#define TCP_MSS                       1460
+#define TCP_SND_BUF                   (8 * TCP_MSS)
+#define TCP_SND_QUEUELEN              ((4 * (TCP_SND_BUF) + (TCP_MSS - 1)) / (TCP_MSS))
+#define LWIP_NETIF_STATUS_CALLBACK    1
+#define LWIP_NETIF_LINK_CALLBACK      1
+#define LWIP_NETIF_HOSTNAME           1
+#define LWIP_NETCONN                  0
+#define LWIP_STATS                    0
+#define LWIP_STATS_DISPLAY            0
+#define MEM_STATS                     0
+#define SYS_STATS                     0
+#define MEMP_STATS                    0
+#define LINK_STATS                    0
+#define LWIP_CHKSUM_ALGORITHM         0
+#define LWIP_DHCP                     1
+#define LWIP_IPV4                     1
+#define LWIP_TCP                      1
+#define LWIP_UDP                      1
+#define LWIP_DNS                      1
+#define LWIP_DNS_SUPPORT_MDNS_QUERIES 1
+#define LWIP_TCP_KEEPALIVE            1
+#define LWIP_NETIF_TX_SINGLE_PBUF     1
+#define DHCP_DOES_ARP_CHECK           0
+#define LWIP_DHCP_DOES_ACD_CHECK      0
+#define LWIP_IGMP                     1
+#define LWIP_MDNS_RESPONDER           1
 
 // See #1285
-#define MEMP_NUM_UDP_PCB            (__LWIP_MEMMULT * 7)
-#define MEMP_NUM_TCP_PCB            (__LWIP_MEMMULT * 5)
+#define MEMP_NUM_UDP_PCB              (__LWIP_MEMMULT * 7)
+#define MEMP_NUM_TCP_PCB              (__LWIP_MEMMULT * 5)
 
 #if LWIP_IPV6
-#define LWIP_IPV6_DHCP6             1
-#define LWIP_IPV6_MLD               1
+#define LWIP_IPV6_DHCP6               1
+#define LWIP_IPV6_MLD                 1
 #endif
 
 // NTP