A/UX® Programmer's Reference

atp(3N)
u char
struct iovec
int
} at_resp_t;
atp(3N)
bitmap;
resp[ATP_TRESP_MAX];
userdata[ATP_TRESP_MAX];
The members of this structure are
bitmap The bitmap of responses expected and for which
buffers are allocated.
resp An iovec structure describing the response buffers
and their lengths.
userdata An array of 32-bit words holding the user bytes for
each A TP response.
The atp_open routine opens an ATP AppleTalk socket and returns
a file descriptor for use with the remaining A TP calls.
socket A pointer to the DDP socket number to open. If the
AppleTalk socket number is 0, or if socket is NULL,
a DDP socket is dynamically assigned. If non­
NULL, the socket number is returned in socket.
The atp close routine closes the ATP AppleTalk socket
identified by the file descriptor Id.
The atp sendreq routine sends an ATP request to another
socket. This call blocks until a response is received. The parameters
are
fd The ATP file descriptor to use in sending the request
dest The AppleTalk internet address of the AppleTalk
socket to which the request should be sent.
buf The request data buffer.
len The size of request data buffer size.
userdata The user bytes for the ATP request header.
Xl) Is true (nonzero) if the request is to be an exactlyonce
(XO) transaction.
Xl) relt Is ignored if xo is not set to true. Otherwise, it may
be used to set the release timer value on the remote
end. The default value is
A TP _XC _DEF _REL_ TIME. The other permissible
values are: ATP_XO_30SEC, ATP_XO_IMIN,
ATP_XO_2MIN, ATP_XO_4MIN, and
ATP _XO_8MIN. These are declared in the file
February, 1990 3
Revision C