# 2.11BSD#431 - /usr/src/sys/h/unpcb.h

##### Macros

    sotounpcb         X

##### struct's

    unpcb             X

       1: /*
       2:  * Copyright (c) 1982, 1986 Regents of the University of California.
       3:  * All rights reserved.
       4:  *
       5:  * Redistribution and use in source and binary forms are permitted
       6:  * provided that this notice is preserved and that due credit is given
       7:  * to the University of California at Berkeley. The name of the University
       8:  * may not be used to endorse or promote products derived from this
       9:  * software without specific prior written permission. This software
      10:  * is provided ``as is'' without express or implied warranty.
      11:  *
      12:  *	@(#)unpcb.h	7.2 (Berkeley) 1/7/88
      13:  */
      14:
      15: /*
      16:  * Protocol control block for an active
      17:  * instance of a UNIX internal protocol.
      18:  *
      19:  * A socket may be associated with an inode in the
      20:  * file system.  If so, the unp_inode pointer holds
      21:  * a reference count to this inode, which should be irele'd
      22:  * when the socket goes away.
      23:  *
      24:  * A socket may be connected to another socket, in which
      25:  * case the control block of the socket to which it is connected
      26:  * is given by unp_conn.
      27:  *
      28:  * A socket may be referenced by a number of sockets (e.g. several
      29:  * sockets may be connected to a datagram socket.)  These sockets
      30:  * are in a linked list starting with unp_refs, linked through
      31:  * unp_nextref and null-terminated.  Note that a socket may be referenced
      32:  * by a number of other sockets and may also reference a socket (not
      33:  * necessarily one which is referencing it).  This generates
      34:  * the need for unp_refs and unp_nextref to be separate fields.
      35:  *
      36:  * Stream sockets keep copies of receive sockbuf sb_cc and sb_mbcnt
      37:  * so that changes in the sockbuf may be computed to modify
      38:  * back pressure on the sender accordingly.
      39:  */
      40: struct  unpcb {
      41:     struct  socket *unp_socket; /* pointer back to socket */
      42:     struct  inode *unp_inode;   /* if associated with file */
      43:     ino_t   unp_ino;        /* fake inode number */
      44:     struct  unpcb *unp_conn;    /* control block of connected socket */
      45:     struct  unpcb *unp_refs;    /* referencing socket linked list */
      46:     struct  unpcb *unp_nextref; /* link in unp_refs list */
      47:     struct  mbuf *unp_addr;     /* bound address of socket */
      48:     int unp_cc;         /* copy of rcv.sb_cc */
      49:     int unp_mbcnt;      /* copy of rcv.sb_mbcnt */
      50: };
      51:
      52: #define sotounpcb(so)   ((struct unpcb *)((so)->so_pcb))

#### Defined struct's

unpcb defined in line 40; used 42 times

- in line 44-46(6)
- in /usr/src/new/crash/dispnet.c line 541(2)
- in /usr/src/sys/sys/uipc_usrreq.c line 42(2), 285(2), 303(2), 310(2), 330(2), 387-388(4), 415-417(4), 452(2), 461(2), 467(2)
- in /usr/src/ucb/netstat/unix.c line 97(2)
- in /usr/src/usr.bin/fstat/fstat.c line 422(2), 531-536(6)

#### Defined macros

sotounpcb defined in line 52; used 3 times

- in /usr/src/sys/sys/uipc_usrreq.c line 42, 387-392(2)

#### Usage of this include

unpcb.h used 4 times

- in /usr/src/new/crash/dispnet.c line 42
- in /usr/src/sys/sys/uipc_usrreq.c line 16
- in /usr/src/ucb/netstat/unix.c line 26
- in /usr/src/usr.bin/fstat/fstat.c line 34

Last modified: 1988-04-27 Generated: 2016-12-26 | Generated by src2html V0.67 page hit count: 455 |