.\" SCCSID: @(#)imp.4p 8.1 9/11/90 .TH imp 4p VAX "" Unsupported .SH Name imp \- IMP raw socket interface .SH Syntax .B #include .br .B #include .br .B #include .PP .B s = socket(AF_IMPLINK, SOCK_RAW, IMPLINK_IP); .SH Description The raw .PN imp socket provides direct access to the .MS imp 4 network interface. Users send packets through the interface using the .MS send 2 calls, and receive packets with the .MS recv 2 , calls. All outgoing packets must have space for an 1822 96-bit leader on the front. Likewise, packets received by the user will have this leader on the front. The 1822 leader and the legal values for the various fields are defined in the include file .RI < netimp/if_imp.h >. .PP The raw imp interface automatically installs the length and destination address in the 1822 leader of all outgoing packets; these need not be filled in by the user. .SH Diagnostics An operation on a socket may fail with one of the following errors: .TP 15 [EISCONN] when trying to establish a connection on a socket which already has one, or when trying to send a datagram with the destination address specified and the socket is already connected. .TP 15 [ENOTCONN] when trying to send a datagram, but no destination address is specified, and the socket hasn't been connected. .TP 15 [ENOBUFS] when the system runs out of memory for an internal data structure. .TP 15 [EADDRNOTAVAIL] when an attempt is made to create a socket with a network address for which no network interface exists. .SH See Also intro(4n), inet(4f), imp(4)
