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MDNS: Add callback to be called manually when IP has changed to announce new IP

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This commit is contained in:
Dirk Ziegelmeier 2016-08-18 10:59:08 +02:00
parent fa6a2d48cc
commit a262a2f252
2 changed files with 30 additions and 10 deletions
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39
src/apps/mdns/mdns.c
View File

@ -18,7 +18,7 @@
* - Checking that source address of unicast requests are on the same network
* - Limiting multicast responses to 1 per second per resource record
* - Fragmenting replies if required
* - Subscribe to netif address/link change events and act on them
* - Subscribe to netif address/link change events and act on them (currently needs to be done manually)
* - Handling multi-packet known answers
* - Individual known answer detection for all local IPv6 addresses
* - Dynamic size of outgoing packet
@ -1510,7 +1510,7 @@ mdns_announce(struct netif *netif, const ip_addr_t *destination)
}
announce.dest_port = MDNS_PORT;
memcpy(&announce.dest_addr, destination, sizeof(ip_addr_t));
memcpy(&announce.dest_addr, destination, sizeof(announce.dest_addr));
mdns_send_outpacket(&announce);
}
@ -1858,6 +1858,32 @@ mdns_resp_init(void)
mdns_netif_client_id = netif_alloc_client_data_id();
}
/**
* @ingroup mdns
* Announce IP settings have changed on netif.
* Call this in your callback registered by netif_set_status_callback().
* This function may go away in the future when netif supports registering
* multiple callback functions.
* @param netif The network interface where settings have changed.
*/
void
mdns_resp_netif_settings_changed(struct netif *netif)
{
LWIP_ERROR("mdns_resp_netif_ip_changed: netif != NULL", (netif != NULL), return);
if (netif->client_data[mdns_netif_client_id] == NULL) {
return;
}
/* Announce on IPv6 and IPv4 */
#if LWIP_IPV6
mdns_announce(netif, IP6_ADDR_ANY);
#endif
#if LWIP_IPV4
mdns_announce(netif, IP_ADDR_ANY);
#endif
}
/**
* @ingroup mdns
* Activate MDNS responder for a network interface and send announce packets.
@ -1901,14 +1927,7 @@ mdns_resp_add_netif(struct netif *netif, const char *hostname, u32_t dns_ttl)
}
#endif
/* Announce on IPv6 and IPv4 */
#if LWIP_IPV6
mdns_announce(netif, IP6_ADDR_ANY);
#endif
#if LWIP_IPV4
mdns_announce(netif, IP_ADDR_ANY);
#endif
mdns_resp_netif_settings_changed(netif);
return ERR_OK;
cleanup:

1
src/include/lwip/apps/mdns.h
View File

@ -58,6 +58,7 @@ err_t mdns_resp_remove_netif(struct netif *netif);
typedef void (*service_get_txt_fn_t)(struct mdns_service *service, void *txt_userdata);
err_t mdns_resp_add_service(struct netif *netif, const char *name, const char *service, u16_t proto, u16_t port, u32_t dns_ttl, service_get_txt_fn_t txt_fn, void *txt_userdata);
err_t mdns_resp_add_service_txtitem(struct mdns_service *service, const char *txt, u8_t txt_len);
void mdns_resp_netif_settings_changed(struct netif *netif);
/* Domain struct and methods - visible for unit tests */