ATM_SEND(4N)     DEVICES AND NETWORK INTERFACES      ATM_SEND(4N)



NAME
     atm_send, atm_sendto - send data  over  an  established  ATM
     connection

SYNOPSIS
     #include <fore_atm/fore_atm_user.h>

     atm_send(fd, buf, len)
     int fd;
     caddr_t buf;
     int len;

     atm_sendto(fd, buf, len, vpvc)
     int fd;
     caddr_t buf;
     int len;
     Vpvc vpvc;

DESCRIPTION
     atm_send() and atm_sendto() attempt to write  len  bytes  of
     data  from  the buffer pointed to by buf over an established
     ATM  connection  referenced  by  the  file  descriptor   fd.
     atm_send() is used with switched virtual circuits (SVCs) and
     may be used with permanent virtual circuits (PVCs)  only  if
     fd    is    associated    with    a    single    PVC    (see
     atm_connect_pvc(4N)).

     When fd is associated with multiple  PVCs,  atm_sendto()  is
     used  to transmit the data over the connection identified by
     the VPI/VCI pair vpvc.  The identifier vpvc must  correspond
     to  an  outgoing PVC actively connected from a previous call
     to atm_connect_pvc(4N).  atm_sendto() may not be  used  with
     SVCs.

     The number of bytes to send as specified  by  len  must  not
     exceed  the size of buf, nor must the number of bytes exceed
     the maximum transmission unit (MTU) for the connection.  See
     atm_open(4N)  for details on the MTU.  For connections using
     an AAL type of aal_null, the data must be in  FORE's  inter-
     mediate  cell  format.  The number of bytes sent must there-
     fore be a multiple of 56.  See atm_intro(4N) for details  on
     cell formats.

RETURN VALUES
     atm_send() and  atm_sendto()  return  the  number  of  bytes
     transmitted  on success.  On failure, they return -1 and set
     atm_errno to indicate the error. atm_error(4N) can  be  used
     to print a text description of errors returned by atm_send()
     and atm_sendto().

ERRORS




FSI Release 2.3   Last change: 28 February 1994                 1






ATM_SEND(4N)     DEVICES AND NETWORK INTERFACES      ATM_SEND(4N)



     atm_send()  and  atm_sendto()  can  also  fail  with  errors
     returned from the write(2) and writev(2) system calls.

     On ULTRIX platforms, calling atm_send() or atm_sendto() on a
     closed  connection  may cause a SIGPIPE signal to be sent to
     the calling process.  Unless caught or  ignored,  this  ter-
     minates the process.

SEE ALSO
     atm_intro(4N),  atm_open(4N),  atm_pvc(4N),  write(2),  wri-
     tev(2)












































FSI Release 2.3   Last change: 28 February 1994                 2