| cyg_mdns_getservicelabel | ||
|---|---|---|
 | 192.1. API |  |
Name
cyg_mdns_getservicelabel — Get current service label value
Synopsis
#include <mdns.h>
cyg_bool cyg_mdns_getservicelabel(const cyg_mdns_service_identity *id, cyg_uint8 *dstbuf, cyg_uint8 *len);
Description
This function provides access to the currently configured mDNS UTF-8
label for the specified id service
descriptor. This function is intended for debug or non-time critical
UI usage. The active label is copied into the supplied buffer, where
the passed *len specifies the valid buffer
length of dstbuf. Normally the referenced dstbuf should
have at least MDNS_MAX_LABEL available space,
and *len set accordingly. The return boolean
state indicates success or failure, with
*len updated with the number of bytes
written/required. On failure the contents of dstbuf are
undefined. If dstbuf is NULL then
the call can be used with a valid len pointer to
ascertain the amount of storage required to hold the name.
![[Note]](pix/note.png) | Note |
|---|---|
It is possible due to a dynamically changing external network that any returned label may already be invalid by the time the call returns the filled buffer to the application. For normal real-world operations the servicelabel callback function should be tracked by the application to cope with the actual active/current state with suitable cross-thread synchronisation implemented as required. |
| Note |
|---|---|
This function is not available if the system is configured
with |
Return value
If a non-null len is supplied then the
referenced location is updated with the label length at the time of
the function call. Boolean true is returned
if dstbuf is NULL or is a pointer to
a *len buffer large enough to hold the service label
at the time of the call, which is filled with the service label. On error
boolean false is returned.
| |  | |
| cyg_mdns_setservicelabel |  | cyg_mdns_servicelabel_callback_register |
| 2024-12-10 | eCosPro Non-Commercial Public License |