DNSServiceResolve(3dns_sd)

1DNSServiceResolve(3DNDSN_SSDS)ervice Discovery Library FunDcNtSiSoenrsviceResolve(3DNS_SD)
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NAME

6       DNSServiceResolve - resolve service instances with DNS
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SYNOPSIS

9       cc [ flag ... ] file ... -ldns_sd [ library ... ]
10       #include <dns_sd.h>
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12       DNSServiceErrorType DNSServiceResolve(DNSServiceRef *sdRef,
13            DNSServiceFlags flags, uint32_t interfaceIndex, const char *name,
14            const char *regtype, const char *domain,
15            DNSServiceServiceResolveReply callBack, void *context);
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18       typedef void(*DNSServiceResolveReply)(DNSServiceRef sdRef,
19            DNSServiceFlags flags, uint32_t interfaceIndex,
20            DNSServiceErrorType errorCode, const char *fullname,
21            const char *hosttarget, uint16_t port, uint16_t txtLen,
22            const char *txtRecord, void *context);
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DESCRIPTION

26       The  DNSServiceResolve()  function  is  used  to resolve a service name
27       returned by DNSServiceBrowse() to host IP address, port number, and TXT
28       record.   The   DNSServiceResolve()   function  returns  results  asyn‐
29       chronously. A DNSServiceResolve() call to resolve service name  can  be
30       ended  by  calling  DNSServiceRefDeallocate().  The  callback  argument
31       points to a function of type DNSServiceResolveReply  as  listed  above.
32       The callback function is invoked on finding a result or when the asynch
33       resolve call fails. The sdRef argument to DNSServiceResolve() points to
34       an uninitialized DNSServiceRef. If the call to DNSServiceResolve() suc‐
35       ceeds, sdRef is initialized and kDNSServiceErr_NoError is returned.
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38       The flags argument  to  DNSServiceResolve()  is  currently  unused  and
39       reserved  for  future  use.  The  interfaceIndex argument indicates the
40       interface on which to resolve the service. If  the  DNSServiceResolve()
41       call is the result of an earlier DNSServiceBrowse() operation, pass the
42       interfaceIndex to perform a resolve on all interfaces. See the  section
43       "Constants  for  specifying  an interface index" in <dns_sd.h> for more
44       details. The  name  parameter  is  the  service  instance  name  to  be
45       resolved, as returned from a DNSServiceBrowse() call. The regtype holds
46       the service type and the domain parameter indicates the domain in which
47       the service instance was found. The context parameter points to a value
48       that is passed to the callback function.
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51       The sdRef argument passed to the callback function  is  initialized  by
52       DNSServiceResolve()  call. The flags parameter in the callback function
53       is currently unused and reserved for future use. The errorCode  parame‐
54       ter  is  kDNSServiceErr_NoError on success. Otherwise, it will hold the
55       error defined in <dns_sd.h> and other  parameters  are  undefined  when
56       errorCode  is nonzero. The fullname parameter in the callback holds the
57       full  service  domain  name   in   the   format   <servicename>.<proto‐
58       col>.<domain>.  The full service domain name is escaped to follow stan‐
59       dard DNS rules. The hosttarget parameter holds the target  hostname  of
60       the  machine  providing  the  service. The port parameter indicates the
61       port in network byte order on which the  service  accepts  connections.
62       The  txtLen and txtRecord parameters hold the length and the TXT record
63       of the service's primary TXT record. The context  parameter  points  to
64       the value that was passed as context to the DNSServiceResolve() call.
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RETURN VALUES

67       The  DNSServiceResolve  function returns kDNSServiceErr_NoError on suc‐
68       cess. Otherwise, an error code defined in  <dns_sd.h>  is  returned  to
69       indicate  an  error  has occurred. When an error is returned by DNSSer‐
70       viceResolve, the callback function is not invoked and the DNSServiceRef
71       argument is not initialized.
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ATTRIBUTES

74       See attributes(5) for description of the following attributes:
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79       ┌─────────────────────────────┬─────────────────────────────┐
80       │      ATTRIBUTE TYPE         │      ATTRIBUTE VALUE        │
81       ├─────────────────────────────┼─────────────────────────────┤
82       │Interface Stability          │Committed                    │
83       ├─────────────────────────────┼─────────────────────────────┤
84       │MT-Level                     │Safe                         │
85       └─────────────────────────────┴─────────────────────────────┘
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NAME

SYNOPSIS

DESCRIPTION

RETURN VALUES

ATTRIBUTES

SEE ALSO