/* uipc_sock.c - uipc socket routines *//* Copyright 1984 - 2002 Wind River Systems, Inc. */#include "copyright_wrs.h"/* * Copyright (c) 1982, 1986, 1988, 1990, 1993 *	The Regents of the University of California.  All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software *    must display the following acknowledgement: *	This product includes software developed by the University of *	California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors *    may be used to endorse or promote products derived from this software *    without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * *	@(#)uipc_socket.c	8.6 (Berkeley) 5/2/95 *//*modification history--------------------01l,05jun02,vvv  fixed Nagle for large writes (SPR #72213)01k,12oct01,rae  merge from truestack ver 01r, base 01h (SPR #64845 etc)01j,07feb01,spm  updated socket handling to detect memory allocation failures01i,24sep98,ham  considered if(m->m_extSize<max_hdr) in sosend() SPR#22209.01h,26aug98,n_s  optimized processing of uio buffer in sosend. spr #22246.01g,26aug98,n_s  added return val check for MALLOC in socreate and for                  mBufClGet in soreceive. spr #22238.01f,11aug97,vin  fixed problems in sosend, adjusted space in sosend01e,23jan97,vin  added fix for SPR7502.01d,03dec96,vin  replaced calloc(..) with MALLOC(..), free(..) with FREE(..)01c,22nov96,vin  added cluster support, replaced m_get with mBufClGet and		 m_gethdr with mHdrClGet.01b,29aug96,vin  added zerocopy interface. 01a,03mar96,vin  created from BSD4.4lite2. Integrated with 02u of uipc_sock.c*/#include "vxWorks.h"#include "semLib.h"#include "memLib.h"#include "errno.h"#include "net/mbuf.h"#include "net/domain.h"#include "net/protosw.h"#include "sys/socket.h"#include "sys/times.h"#include "net/socketvar.h"#include "sys/ioctl.h"#include "net/uio.h"#include "net/route.h"#include "netinet/in.h"#include "net/if.h"#include "net/systm.h"#include "selectLib.h"#include "sockLib.h"#include "netLib.h"#ifdef WV_INSTRUMENTATION#ifdef INCLUDE_WVNET#include "wvNetLib.h"#endif#endif#ifdef WV_INSTRUMENTATION#ifdef INCLUDE_WVNET    /* Set common fields of event identifiers for this module. */LOCAL UCHAR wvNetModuleId = WV_NET_UISOCK_MODULE;  /* Value for uipc_sock.c */LOCAL UCHAR wvNetLocalFilter = WV_NET_NONE;     /* Available event filter */LOCAL ULONG wvNetEventId;       /* Event identifier: see wvNetLib.h */#endif    /* INCLUDE_WVNET */#endifextern int uiomove();/* * Socket operation routines. * These routines are called by the routines in * sys_socket.c or from a system process, and * implement the semantics of socket operations by * switching out to the protocol specific routines. *//*ARGSUSED*/intsocreate(dom, aso, type, proto)	int dom;	struct socket **aso;	register int type;	int proto;{	register struct protosw *prp;	register struct socket *so;	register int error;#ifdef WV_INSTRUMENTATION#ifdef INCLUDE_WVNET    /* WV_NET_VERBOSE event */    WV_NET_MARKER_0 (NET_AUX_EVENT, WV_NET_VERBOSE, 45, 11,                     WV_NETEVENT_SOCREATE_START)#endif  /* INCLUDE_WVNET */#endif	if (proto)		prp = pffindproto(dom, proto, type);	else		prp = pffindtype(dom, type);	if (prp == 0 || prp->pr_usrreq == 0)            {#ifdef WV_INSTRUMENTATION#ifdef INCLUDE_WVNET    /* WV_NET_ERROR event */            WV_NET_MARKER_3 (NET_AUX_EVENT, WV_NET_ERROR, 43, 6,                             WV_NETEVENT_SOCREATE_SEARCHFAIL,                             dom, proto, type)#endif  /* INCLUDE_WVNET */#endif            return (EPROTONOSUPPORT);            }	if (prp->pr_type != type)            {/* XXX - This event does not occur because the search routines will always *       return a protocol switch entry which matches the given type value.#ifdef WV_INSTRUMENTATION#ifdef INCLUDE_WVNET    /@ WV_NET_ERROR event @/            WV_NET_MARKER_2 (NET_AUX_EVENT, WV_NET_ERROR, 44, 7,                             WV_NETEVENT_SOCREATE_BADTYPE, prp->pr_type, type)#endif  /@ INCLUDE_WVNET @/#endif * XXX - end of unused event */            return (EPROTOTYPE);            }        MALLOC(so, struct socket *, sizeof(*so), MT_SOCKET, M_WAIT);	if (so == (struct socket *) NULL)	    {	    return (ENOBUFS);	    }        bzero((caddr_t)so, sizeof(*so));	so->so_options = 0; 	so->so_type = type;	/* all sockets will be priveledged */	so->so_state = SS_PRIV;	so->so_proto = prp;	/* initialize socket semaphores */	so->so_timeoSem = semBCreate (SEM_Q_PRIORITY, SEM_EMPTY);        if (so->so_timeoSem == NULL)            {            so->so_state |= SS_NOFDREF;            sofree(so);            return (ENOMEM);            }	so->so_rcv.sb_Sem = semBCreate (SEM_Q_PRIORITY, SEM_EMPTY);        if (so->so_rcv.sb_Sem == NULL)            {            so->so_state |= SS_NOFDREF;            sofree(so);            return (ENOMEM);            }	so->so_snd.sb_Sem = semBCreate (SEM_Q_PRIORITY, SEM_EMPTY);        if (so->so_snd.sb_Sem == NULL)            {            so->so_state |= SS_NOFDREF;            sofree(so);            return (ENOMEM);            }	so->so_rcv.sb_want = 0;	so->so_snd.sb_want = 0;	/* initialize the select stuff */	selWakeupListInit (&so->so_selWakeupList);        so->selectFlag = TRUE;	error =	    (*prp->pr_usrreq)(so, PRU_ATTACH, (struct mbuf *)0,		(struct mbuf *)(long)proto, (struct mbuf *)0);	if (error) {		so->so_state |= SS_NOFDREF;		sofree(so);		return (error);	}	*aso = so;	return (0);}intsobind(so, nam)	struct socket *so;	struct mbuf *nam;{	int s = splnet();	int error;#ifdef WV_INSTRUMENTATION#ifdef INCLUDE_WVNET    /* WV_NET_VERBOSE event */    WV_NET_MARKER_1 (NET_AUX_EVENT, WV_NET_VERBOSE, 46, 12,                     WV_NETEVENT_SOBIND_START, so->so_fd)#endif  /* INCLUDE_WVNET */#endif	error =	    (*so->so_proto->pr_usrreq)(so, PRU_BIND,		(struct mbuf *)0, nam, (struct mbuf *)0);	splx(s);	return (error);}intsolisten(so, backlog)	register struct socket *so;	int backlog;{	int s = splnet(), error;#ifdef WV_INSTRUMENTATION#ifdef INCLUDE_WVNET    /* WV_NET_VERBOSE event */    WV_NET_MARKER_1 (NET_AUX_EVENT, WV_NET_VERBOSE, 47, 13,                     WV_NETEVENT_SOLISTEN_START, so->so_fd)#endif  /* INCLUDE_WVNET */#endif	error =	    (*so->so_proto->pr_usrreq)(so, PRU_LISTEN,		(struct mbuf *)0, (struct mbuf *)0, (struct mbuf *)0);	if (error) {		splx(s);		return (error);	}	if (so->so_q == 0)		so->so_options |= SO_ACCEPTCONN;	if (backlog < 0)		backlog = 0;	so->so_qlimit = min(backlog, SOMAXCONN);	splx(s);	return (0);}void sofree    (    register struct socket *so    )    {#ifdef WV_INSTRUMENTATION#ifdef INCLUDE_WVNET    /* WV_NET_VERBOSE event */    WV_NET_MARKER_1 (NET_AUX_EVENT, WV_NET_VERBOSE, 48, 14,                     WV_NETEVENT_SOFREE_START, so->so_fd)#endif  /* INCLUDE_WVNET */#endif    if (so->so_state & SS_NOFDREF)        {        /*         * Always remove semaphores when closing socket. Existing TCP         * connections exit after the next test, preventing correct         * reclamation of these objects.         */        if (so->so_timeoSem)            {            semDelete (so->so_timeoSem);            so->so_timeoSem = NULL;            }        if (so->so_snd.sb_Sem)            {            semDelete (so->so_snd.sb_Sem);            so->so_snd.sb_Sem = NULL;            }        if (so->so_rcv.sb_Sem)            {            semDelete (so->so_rcv.sb_Sem);            so->so_rcv.sb_Sem = NULL;            }        if (so->selectFlag)            {            selWakeupListTerm (&so->so_selWakeupList);            so->selectFlag = FALSE;            }        }     if (so->so_pcb || (so->so_state & SS_NOFDREF) == 0)        return;    if (so->so_head)        {        if (!soqremque (so, 0) && !soqremque (so, 1))            {#ifdef WV_INSTRUMENTATION#ifdef INCLUDE_WVNET    /* WV_NET_EMERGENCY event */            WV_NET_MARKER_1 (NET_AUX_EVENT, WV_NET_EMERGENCY, 38, 1,                             WV_NETEVENT_SOFREE_PANIC, so->so_fd)#endif  /* INCLUDE_WVNET */#endif            panic ("sofree dq");            }        so->so_head = 0;        }    sbrelease (&so->so_snd);    sorflush (so);    FREE (so, MT_SOCKET);     }/* * Close a socket on last file table reference removal. * Initiate disconnect if connected. * Free socket when disconnect complete. */int soclose    (    register struct socket *so    )    {    int s = splnet();		/* conservative */    int error = 0;    SEL_WAKEUP_NODE *pWakeupNode;    SEL_WAKEUP_LIST *pWakeupList;#ifdef WV_INSTRUMENTATION#ifdef INCLUDE_WVNET    /* WV_NET_VERBOSE event */    WV_NET_MARKER_1 (NET_AUX_EVENT, WV_NET_VERBOSE, 49, 15,                     WV_NETEVENT_SOCLOSE_START, so->so_fd)#endif  /* INCLUDE_WVNET */#endif    if (so->so_options & SO_ACCEPTCONN)        {        while (so->so_q0)               (void) soabort(so->so_q0);        while (so->so_q)               (void) soabort(so->so_q);        }    if (so->so_pcb == 0)        goto discard;    if (so->so_state & SS_ISCONNECTED)        {        if ((so->so_state & SS_ISDISCONNECTING) == 0)            {            error = sodisconnect(so);            if (error)                goto drop;            }        if (so->so_options & SO_LINGER)            {            if ( (so->so_state & SS_ISDISCONNECTING) &&                (so->so_state & SS_NBIO))                goto drop;            while (so->so_state & SS_ISCONNECTED)                {#ifdef WV_INSTRUMENTATION#ifdef INCLUDE_WVNET    /* WV_NET_INFO event */                WV_NET_MARKER_1 (NET_AUX_EVENT, WV_NET_INFO, 52, 10,                                 WV_NETEVENT_SOCLOSE_WAIT, so->so_fd)#endif  /* INCLUDE_WVNET */#endif                ksleep(so->so_timeoSem);                }            }        }drop:    if (so->so_pcb)        {        int error2 = (*so->so_proto->pr_usrreq) (so, PRU_DETACH,                                                 (struct mbuf *)0,                                                  (struct mbuf *)0,                                                  (struct mbuf *)0);        if (error == 0)            error = error2;        }discard:    /* clean up the select wakeup list for this socket */    pWakeupList = &so->so_selWakeupList;    if (lstCount (&pWakeupList->wakeupList) != 0)        {        semTake (&pWakeupList->listMutex, WAIT_FOREVER);        while ((pWakeupNode =  	       (SEL_WAKEUP_NODE *) lstFirst (&pWakeupList->wakeupList)))	    soo_unselect (so, pWakeupNode);	semGive (&pWakeupList->listMutex);	}    if (so->so_state & SS_NOFDREF)        {#ifdef WV_INSTRUMENTATION#ifdef INCLUDE_WVNET    /* WV_NET_EMERGENCY event */        WV_NET_MARKER_1 (NET_AUX_EVENT, WV_NET_EMERGENCY, 39, 2,                         WV_NETEVENT_SOCLOSE_PANIC, so->so_fd)#endif  /* INCLUDE_WVNET */#endif            panic ("soclose: NOFDREF");        }    so->so_state |= SS_NOFDREF;    sofree (so);    splx (s);    return (error);    }/* * Must be called at splnet... */int soabort    (    struct socket *so    )    {#ifdef WV_INSTRUMENTATION#ifdef INCLUDE_WVNET    /* WV_NET_VERBOSE event */    WV_NET_MARKER_1 (NET_AUX_EVENT, WV_NET_VERBOSE, 50, 16,                     WV_NETEVENT_SOABORT_START, so->so_fd)#endif  /* INCLUDE_WVNET */#endif    return ( (*so->so_proto->pr_usrreq) (so, PRU_ABORT, (struct mbuf *)0,                                         (struct mbuf *)0, (struct mbuf *)0));    }intsoaccept(so, nam)	register struct socket *so;	struct mbuf *nam;{	int s = splnet();	int error;#ifdef WV_INSTRUMENTATION#ifdef INCLUDE_WVNET    /* WV_NET_VERBOSE event */    WV_NET_MARKER_1 (NET_AUX_EVENT, WV_NET_VERBOSE, 51, 17,                     WV_NETEVENT_SOACCEPT_START, so->so_fd)#endif  /* INCLUDE_WVNET */#endif    if ( (so->so_state & SS_NOFDREF) == 0)        {#ifdef WV_INSTRUMENTATION#ifdef INCLUDE_WVNET    /* WV_NET_EMERGENCY event */        WV_NET_MARKER_1 (NET_AUX_EVENT, WV_NET_EMERGENCY, 40, 3,                         WV_NETEVENT_SOACCEPT_PANIC, so->so_fd)#endif  /* INCLUDE_WVNET */#endif        panic("soaccept: !NOFDREF");        }    so->so_state &= ~SS_NOFDREF;    error = (*so->so_proto->pr_usrreq)(so, PRU_ACCEPT, (struct mbuf *)0,                                        nam, (struct mbuf *)0);    splx (s);    return (error);    }intsoconnect(so, nam)	register struct socket *so;