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mdns: add config option to use netif ext callback

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e.g. if the calling stack should not invoke the mdns functions due
to high stack usage, disable the option and trigger it yourself.

Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
This commit is contained in:
Simon Goldschmidt 2018-07-03 21:09:33 +02:00
parent b398a2a394
commit 2d65251c6c
2 changed files with 13 additions and 2 deletions
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8
src/apps/mdns/mdns.c
View File

@ -102,7 +102,9 @@ static const ip_addr_t v6group = DNS_MQUERY_IPV6_GROUP_INIT;
static u8_t mdns_netif_client_id;
static struct udp_pcb *mdns_pcb;
#if MDNS_RESP_USENETIF_EXTCALLBACK
NETIF_DECLARE_EXT_CALLBACK(netif_callback)
#endif
static mdns_name_result_cb_t mdns_name_result_cb;
#define NETIF_TO_HOST(netif) (struct mdns_host*)(netif_get_client_data(netif, mdns_netif_client_id))
@ -1912,7 +1914,7 @@ dealloc:
pbuf_free(p);
}
#if LWIP_NETIF_EXT_STATUS_CALLBACK
#if LWIP_NETIF_EXT_STATUS_CALLBACK && MDNS_RESP_USENETIF_EXTCALLBACK
static void
mdns_netif_ext_status_callback(struct netif *netif, netif_nsc_reason_t reason, const netif_ext_callback_args_t *args)
{
@ -1940,7 +1942,7 @@ mdns_netif_ext_status_callback(struct netif *netif, netif_nsc_reason_t reason, c
mdns_resp_announce(netif);
}
}
#endif
#endif /* LWIP_NETIF_EXT_STATUS_CALLBACK && MDNS_RESP_USENETIF_EXTCALLBACK */
static err_t
mdns_send_probe(struct netif* netif, const ip_addr_t *destination)
@ -2396,8 +2398,10 @@ mdns_resp_init(void)
mdns_netif_client_id = netif_alloc_client_data_id();
#if MDNS_RESP_USENETIF_EXTCALLBACK
/* register for netif events when started on first netif */
netif_add_ext_callback(&netif_callback, mdns_netif_ext_status_callback);
#endif
}
#endif /* LWIP_MDNS_RESPONDER */

7
src/include/lwip/apps/mdns_opts.h
View File

@ -59,6 +59,13 @@
#define MDNS_MAX_SERVICES 1
#endif
/** MDNS_RESP_USENETIF_EXTCALLBACK==1: register an ext_callback on the netif
* to automatically restart probing/announcing on status or address change.
*/
#ifndef MDNS_RESP_USENETIF_EXTCALLBACK
#define MDNS_RESP_USENETIF_EXTCALLBACK LWIP_NETIF_EXT_STATUS_CALLBACK
#endif
/**
* MDNS_DEBUG: Enable debugging for multicast DNS.
*/