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MDNS: Use new netif callback, now does not need mdns_resp_netif_settings_changed() calls from user any more when LWIP_NETIF_EXT_STATUS_CALLBACK is enabled
This commit is contained in:
Dirk Ziegelmeier
parent
454927151d
commit
35e148e26d
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@ -18,7 +18,6 @@
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* - Checking that source address of unicast requests are on the same network
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* - Limiting multicast responses to 1 per second per resource record
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* - Fragmenting replies if required
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* - Subscribe to netif address/link change events and act on them (currently needs to be done manually)
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* - Handling multi-packet known answers
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* - Individual known answer detection for all local IPv6 addresses
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* - Dynamic size of outgoing packet
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@ -102,6 +101,7 @@ static const ip_addr_t v6group = DNS_MQUERY_IPV6_GROUP_INIT;
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static u8_t mdns_netif_client_id;
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static struct udp_pcb *mdns_pcb;
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NETIF_DECLARE_EXT_CALLBACK(netif_callback)
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#define NETIF_TO_HOST(netif) (struct mdns_host*)(netif_get_client_data(netif, mdns_netif_client_id))
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@ -1803,36 +1803,12 @@ dealloc:
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pbuf_free(p);
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}
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/**
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* @ingroup mdns
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* Initiate MDNS responder. Will open UDP sockets on port 5353
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*/
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void
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mdns_resp_init(void)
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{
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err_t res;
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mdns_pcb = udp_new_ip_type(IPADDR_TYPE_ANY);
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LWIP_ASSERT("Failed to allocate pcb", mdns_pcb != NULL);
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#if LWIP_MULTICAST_TX_OPTIONS
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udp_set_multicast_ttl(mdns_pcb, MDNS_TTL);
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#else
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mdns_pcb->ttl = MDNS_TTL;
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#endif
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res = udp_bind(mdns_pcb, IP_ANY_TYPE, MDNS_PORT);
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LWIP_UNUSED_ARG(res); /* in case of LWIP_NOASSERT */
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LWIP_ASSERT("Failed to bind pcb", res == ERR_OK);
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udp_recv(mdns_pcb, mdns_recv, NULL);
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mdns_netif_client_id = netif_alloc_client_data_id();
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}
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/**
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* @ingroup mdns
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* Announce IP settings have changed on netif.
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* Call this in your callback registered by netif_set_status_callback().
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* This function may go away in the future when netif supports registering
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* multiple callback functions.
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* No need to call this function when LWIP_NETIF_EXT_STATUS_CALLBACK==1,
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* this handled automatically for you.
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* @param netif The network interface where settings have changed.
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*/
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void
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@ -1846,13 +1822,52 @@ mdns_resp_netif_settings_changed(struct netif *netif)
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/* Announce on IPv6 and IPv4 */
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#if LWIP_IPV6
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mdns_announce(netif, IP6_ADDR_ANY);
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mdns_announce(netif, IP6_ADDR_ANY);
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#endif
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#if LWIP_IPV4
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mdns_announce(netif, IP4_ADDR_ANY);
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mdns_announce(netif, IP4_ADDR_ANY);
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#endif
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}
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#if LWIP_NETIF_EXT_STATUS_CALLBACK
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static void
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mdns_netif_ext_status_callback(struct netif* netif, netif_nsc_reason_t reason, u16_t num, const void* arg)
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{
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LWIP_UNUSED_ARG(num);
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LWIP_UNUSED_ARG(arg);
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/* MDNS enabled on netif? */
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if (NETIF_TO_HOST(netif) == NULL) {
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return;
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}
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switch (reason)
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{
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case LWIP_NSC_STATUS_CHANGED:
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if (num != 0) {
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mdns_resp_netif_settings_changed(netif);
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}
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/* TODO: send goodbye message */
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break;
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case LWIP_NSC_LINK_CHANGED:
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if (num != 0) {
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mdns_resp_netif_settings_changed(netif);
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}
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break;
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case LWIP_NSC_IPV4_ADDRESS_CHANGED: /* fall through */
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case LWIP_NSC_IPV4_GATEWAY_CHANGED: /* fall through */
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case LWIP_NSC_IPV4_NETMASK_CHANGED: /* fall through */
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case LWIP_NSC_IPV4_SETTINGS_CHANGED: /* fall through */
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case LWIP_NSC_IPV6_SET: /* fall through */
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case LWIP_NSC_IPV6_ADDR_STATE_CHANGED:
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mdns_resp_netif_settings_changed(netif);
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break;
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default:
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break;
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}
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}
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#endif
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/**
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* @ingroup mdns
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* Activate MDNS responder for a network interface and send announce packets.
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@ -1875,7 +1890,7 @@ mdns_resp_add_netif(struct netif *netif, const char *hostname, u32_t dns_ttl)
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LWIP_ASSERT("mdns_resp_add_netif: Double add", NETIF_TO_HOST(netif) == NULL);
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mdns = (struct mdns_host *) mem_malloc(sizeof(struct mdns_host));
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LWIP_ERROR("mdns_resp_add_netif: Alloc failed", (mdns != NULL), return ERR_MEM);
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netif_set_client_data(netif, mdns_netif_client_id, mdns);
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memset(mdns, 0, sizeof(struct mdns_host));
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@ -2025,4 +2040,31 @@ mdns_resp_add_service_txtitem(struct mdns_service *service, const char *txt, u8_
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return mdns_domain_add_label(&service->txtdata, txt, txt_len);
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}
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/**
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* @ingroup mdns
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* Initiate MDNS responder. Will open UDP sockets on port 5353
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*/
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void
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mdns_resp_init(void)
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{
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err_t res;
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mdns_pcb = udp_new_ip_type(IPADDR_TYPE_ANY);
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LWIP_ASSERT("Failed to allocate pcb", mdns_pcb != NULL);
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#if LWIP_MULTICAST_TX_OPTIONS
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udp_set_multicast_ttl(mdns_pcb, MDNS_TTL);
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#else
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mdns_pcb->ttl = MDNS_TTL;
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#endif
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res = udp_bind(mdns_pcb, IP_ANY_TYPE, MDNS_PORT);
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LWIP_UNUSED_ARG(res); /* in case of LWIP_NOASSERT */
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LWIP_ASSERT("Failed to bind pcb", res == ERR_OK);
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udp_recv(mdns_pcb, mdns_recv, NULL);
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mdns_netif_client_id = netif_alloc_client_data_id();
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/* register for netif events when started on first netif */
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netif_add_ext_callback(&netif_callback, mdns_netif_ext_status_callback);
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}
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#endif /* LWIP_MDNS_RESPONDER */
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