mdns_out.c File Reference

#include "lwip/apps/mdns_out.h"
#include "lwip/apps/mdns_priv.h"
#include "lwip/apps/mdns_domain.h"
#include "lwip/prot/dns.h"
#include "lwip/prot/iana.h"
#include "lwip/udp.h"
#include <string.h>
#include "lwip/prot/ip6.h"

Functions
void	mdns_prepare_txtdata (struct mdns_service *service)
err_t	mdns_create_outpacket (struct netif *netif, struct mdns_outmsg *msg, struct mdns_outpacket *outpkt)
err_t	mdns_send_outpacket (struct mdns_outmsg *msg, struct netif *netif)
void	mdns_multicast_timeout_reset_ipv4 (void *arg)
void	mdns_multicast_probe_timeout_reset_ipv4 (void *arg)
void	mdns_multicast_timeout_25ttl_reset_ipv4 (void *arg)
void	mdns_send_multicast_msg_delayed_ipv4 (void *arg)
void	mdns_send_unicast_msg_delayed_ipv4 (void *arg)
void	mdns_start_multicast_timeouts_ipv4 (struct netif *netif)
void	mdns_multicast_timeout_reset_ipv6 (void *arg)
void	mdns_multicast_probe_timeout_reset_ipv6 (void *arg)
void	mdns_multicast_timeout_25ttl_reset_ipv6 (void *arg)
void	mdns_send_multicast_msg_delayed_ipv6 (void *arg)
void	mdns_send_unicast_msg_delayed_ipv6 (void *arg)
void	mdns_start_multicast_timeouts_ipv6 (struct netif *netif)
void	mdns_set_timeout (struct netif *netif, u32_t msecs, sys_timeout_handler handler, u8_t *busy_flag)
err_t	mdns_send_request (struct mdns_request *req, struct netif *netif, const ip_addr_t *destination)

Detailed Description

MDNS responder implementation - output related functionalities

Function Documentation

mdns_create_outpacket()

err_t mdns_create_outpacket	(	struct netif *	netif,
		struct mdns_outmsg *	msg,
		struct mdns_outpacket *	outpkt )

Create packet with chosen answers as a reply

Add all selected answers / questions Add additional answers based on the selected answers

mdns_multicast_probe_timeout_reset_ipv4()

void mdns_multicast_probe_timeout_reset_ipv4

(

void *

arg

)

Called by timeouts when timer is passed, allows direct multicast IPv4 probe response traffic again and sends out probe response if one was pending

Parameters

arg	pointer to netif of timeout.

mdns_multicast_probe_timeout_reset_ipv6()

void mdns_multicast_probe_timeout_reset_ipv6

(

void *

arg

)

Called by timeouts when timer is passed, allows direct multicast IPv6 probe response traffic again and sends out probe response if one was pending

Parameters

arg	pointer to netif of timeout.

mdns_multicast_timeout_25ttl_reset_ipv4()

void mdns_multicast_timeout_25ttl_reset_ipv4

(

void *

arg

)

Called by timeouts when timer is passed, allows to send an answer on a QU question via multicast.

Parameters

arg	pointer to netif of timeout.

mdns_multicast_timeout_25ttl_reset_ipv6()

void mdns_multicast_timeout_25ttl_reset_ipv6

(

void *

arg

)

Called by timeouts when timer is passed, allows to send an answer on a QU question via multicast.

Parameters

arg	pointer to netif of timeout.

mdns_multicast_timeout_reset_ipv4()

void mdns_multicast_timeout_reset_ipv4

(

void *

arg

)

Called by timeouts when timer is passed, allows multicast IPv4 traffic again.

Parameters

arg	pointer to netif of timeout.

mdns_multicast_timeout_reset_ipv6()

void mdns_multicast_timeout_reset_ipv6

(

void *

arg

)

Called by timeouts when timer is passed, allows multicast IPv6 traffic again.

Parameters

arg	pointer to netif of timeout.

mdns_prepare_txtdata()

void mdns_prepare_txtdata

(

struct mdns_service *

service

)

Call user supplied function to setup TXT data

Parameters

service

The service to build TXT record for

mdns_send_multicast_msg_delayed_ipv4()

void mdns_send_multicast_msg_delayed_ipv4

(

void *

arg

)

Called by timeouts when timer is passed, sends out delayed multicast IPv4 response.

Parameters

arg	pointer to netif of timeout.

mdns_send_multicast_msg_delayed_ipv6()

void mdns_send_multicast_msg_delayed_ipv6

(

void *

arg

)

Called by timeouts when timer is passed, sends out delayed multicast IPv6 response.

Parameters

arg	pointer to netif of timeout.

mdns_send_outpacket()

err_t mdns_send_outpacket	(	struct mdns_outmsg *	msg,
		struct netif *	netif )

Send chosen answers as a reply

Create the packet Send the packet

mdns_send_request()

err_t mdns_send_request	(	struct mdns_request *	req,
		struct netif *	netif,
		const ip_addr_t *	destination )

Send search request containing all our known data

Parameters

req	The request to send
netif	The network interface to send on
destination	The target address to send to (usually multicast address)

mdns_send_unicast_msg_delayed_ipv4()

void mdns_send_unicast_msg_delayed_ipv4

(

void *

arg

)

Called by timeouts when timer is passed, sends out delayed unicast IPv4 response.

Parameters

arg	pointer to netif of timeout.

mdns_send_unicast_msg_delayed_ipv6()

void mdns_send_unicast_msg_delayed_ipv6

(

void *

arg

)

Called by timeouts when timer is passed, sends out delayed unicast IPv6 response.

Parameters

arg	pointer to netif of timeout.

mdns_set_timeout()

void mdns_set_timeout	(	struct netif *	netif,
		u32_t	msecs,
		sys_timeout_handler	handler,
		u8_t *	busy_flag )

Sets a timer that calls the handler when finished. Depending on the busy_flag the timer is restarted or started. The flag is set before return. Sys_timeout does not give us this functionality.

Parameters

netif	Network interface info
msecs	Time value to set
handler	Callback function to call
busy_flag	Pointer to flag that displays if the timer is running or not.

mdns_start_multicast_timeouts_ipv4()

void mdns_start_multicast_timeouts_ipv4

(

struct netif *

netif

)

Start all multicast timeouts for IPv4 Timeouts started:

• do not multicast within one second
• do not multicast a probe response within 250ms
• send a multicast answer on a QU question if not send recently.

Parameters

netif

network interface to start timeouts on

mdns_start_multicast_timeouts_ipv6()

void mdns_start_multicast_timeouts_ipv6

(

struct netif *

netif

)

Start all multicast timeouts for IPv6 Timeouts started:

• do not multicast within one second
• do not multicast a probe response within 250ms
• send a multicast answer on a QU question if not send recently.

Parameters

netif

network interface to start timeouts on