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30 |
unneback |
/*
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* Copyright (c) 1982, 1986, 1988, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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| 33 |
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* @(#)uipc_socket.c 8.3 (Berkeley) 4/15/94
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* $Id: uipc_socket.c,v 1.2 2001-09-27 12:01:51 chris Exp $
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*/
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#include <sys/param.h>
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| 38 |
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#include <sys/queue.h>
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| 39 |
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#include <sys/systm.h>
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| 40 |
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#include <sys/proc.h>
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| 41 |
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#include <sys/file.h>
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#include <sys/malloc.h>
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| 43 |
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#include <sys/mbuf.h>
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| 44 |
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#include <sys/domain.h>
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#include <sys/kernel.h>
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#include <sys/protosw.h>
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| 47 |
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#include <sys/socket.h>
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| 48 |
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#include <sys/socketvar.h>
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| 49 |
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#include <sys/resourcevar.h>
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| 50 |
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#include <sys/signalvar.h>
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| 51 |
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#include <sys/sysctl.h>
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| 52 |
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#include <limits.h>
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| 53 |
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| 54 |
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static int somaxconn = SOMAXCONN;
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| 55 |
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SYSCTL_INT(_kern, KERN_SOMAXCONN, somaxconn, CTLFLAG_RW, &somaxconn, 0, "");
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| 56 |
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| 57 |
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/*
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| 58 |
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* Socket operation routines.
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| 59 |
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* These routines are called by the routines in
|
| 60 |
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* sys_socket.c or from a system process, and
|
| 61 |
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* implement the semantics of socket operations by
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* switching out to the protocol specific routines.
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*/
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| 64 |
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/*ARGSUSED*/
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int
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socreate(dom, aso, type, proto, p)
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| 67 |
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int dom;
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| 68 |
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struct socket **aso;
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| 69 |
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register int type;
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| 70 |
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int proto;
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| 71 |
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struct proc *p;
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{
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| 73 |
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register struct protosw *prp;
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register struct socket *so;
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register int error;
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| 77 |
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if (proto)
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prp = pffindproto(dom, proto, type);
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| 79 |
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else
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| 80 |
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prp = pffindtype(dom, type);
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| 81 |
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if (prp == 0 || prp->pr_usrreqs == 0)
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| 82 |
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return (EPROTONOSUPPORT);
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| 83 |
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if (prp->pr_type != type)
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| 84 |
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return (EPROTOTYPE);
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| 85 |
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MALLOC(so, struct socket *, sizeof(*so), M_SOCKET, M_WAIT);
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| 86 |
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bzero((caddr_t)so, sizeof(*so));
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| 87 |
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TAILQ_INIT(&so->so_incomp);
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| 88 |
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TAILQ_INIT(&so->so_comp);
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| 89 |
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so->so_type = type;
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| 90 |
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so->so_state = SS_PRIV;
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| 91 |
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so->so_uid = 0;
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| 92 |
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so->so_proto = prp;
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| 93 |
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error = (*prp->pr_usrreqs->pru_attach)(so, proto);
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| 94 |
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if (error) {
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| 95 |
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so->so_state |= SS_NOFDREF;
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| 96 |
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sofree(so);
|
| 97 |
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return (error);
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| 98 |
|
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}
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| 99 |
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*aso = so;
|
| 100 |
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return (0);
|
| 101 |
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}
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| 102 |
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|
| 103 |
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int
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| 104 |
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sobind(so, nam)
|
| 105 |
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struct socket *so;
|
| 106 |
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struct mbuf *nam;
|
| 107 |
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{
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| 108 |
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int s = splnet();
|
| 109 |
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int error;
|
| 110 |
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|
|
| 111 |
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error = (*so->so_proto->pr_usrreqs->pru_bind)(so, nam);
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| 112 |
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splx(s);
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| 113 |
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return (error);
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| 114 |
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}
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| 115 |
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|
| 116 |
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int
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| 117 |
|
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solisten(so, backlog)
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| 118 |
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register struct socket *so;
|
| 119 |
|
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int backlog;
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| 120 |
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{
|
| 121 |
|
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int s = splnet(), error;
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| 122 |
|
|
|
| 123 |
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error = (*so->so_proto->pr_usrreqs->pru_listen)(so);
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| 124 |
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if (error) {
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| 125 |
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splx(s);
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| 126 |
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return (error);
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| 127 |
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}
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| 128 |
|
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if (so->so_comp.tqh_first == NULL)
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| 129 |
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so->so_options |= SO_ACCEPTCONN;
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| 130 |
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if (backlog < 0 || backlog > somaxconn)
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| 131 |
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backlog = somaxconn;
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| 132 |
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so->so_qlimit = backlog;
|
| 133 |
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splx(s);
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| 134 |
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return (0);
|
| 135 |
|
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}
|
| 136 |
|
|
|
| 137 |
|
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void
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| 138 |
|
|
sofree(so)
|
| 139 |
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register struct socket *so;
|
| 140 |
|
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{
|
| 141 |
|
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struct socket *head = so->so_head;
|
| 142 |
|
|
|
| 143 |
|
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if (so->so_pcb || (so->so_state & SS_NOFDREF) == 0)
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| 144 |
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return;
|
| 145 |
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if (head != NULL) {
|
| 146 |
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if (so->so_state & SS_INCOMP) {
|
| 147 |
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TAILQ_REMOVE(&head->so_incomp, so, so_list);
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| 148 |
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head->so_incqlen--;
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| 149 |
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} else if (so->so_state & SS_COMP) {
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| 150 |
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TAILQ_REMOVE(&head->so_comp, so, so_list);
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| 151 |
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} else {
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| 152 |
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panic("sofree: not queued");
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| 153 |
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}
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| 154 |
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head->so_qlen--;
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| 155 |
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so->so_state &= ~(SS_INCOMP|SS_COMP);
|
| 156 |
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so->so_head = NULL;
|
| 157 |
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}
|
| 158 |
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sbrelease(&so->so_snd);
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| 159 |
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sorflush(so);
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| 160 |
|
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FREE(so, M_SOCKET);
|
| 161 |
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}
|
| 162 |
|
|
|
| 163 |
|
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/*
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| 164 |
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* Close a socket on last file table reference removal.
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| 165 |
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* Initiate disconnect if connected.
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| 166 |
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* Free socket when disconnect complete.
|
| 167 |
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*/
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| 168 |
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int
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| 169 |
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soclose(so)
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| 170 |
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register struct socket *so;
|
| 171 |
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{
|
| 172 |
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int s = splnet(); /* conservative */
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| 173 |
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int error = 0;
|
| 174 |
|
|
|
| 175 |
|
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if (so->so_options & SO_ACCEPTCONN) {
|
| 176 |
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struct socket *sp, *sonext;
|
| 177 |
|
|
|
| 178 |
|
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for (sp = so->so_incomp.tqh_first; sp != NULL; sp = sonext) {
|
| 179 |
|
|
sonext = sp->so_list.tqe_next;
|
| 180 |
|
|
(void) soabort(sp);
|
| 181 |
|
|
}
|
| 182 |
|
|
for (sp = so->so_comp.tqh_first; sp != NULL; sp = sonext) {
|
| 183 |
|
|
sonext = sp->so_list.tqe_next;
|
| 184 |
|
|
(void) soabort(sp);
|
| 185 |
|
|
}
|
| 186 |
|
|
}
|
| 187 |
|
|
if (so->so_pcb == 0)
|
| 188 |
|
|
goto discard;
|
| 189 |
|
|
if (so->so_state & SS_ISCONNECTED) {
|
| 190 |
|
|
if ((so->so_state & SS_ISDISCONNECTING) == 0) {
|
| 191 |
|
|
error = sodisconnect(so);
|
| 192 |
|
|
if (error)
|
| 193 |
|
|
goto drop;
|
| 194 |
|
|
}
|
| 195 |
|
|
if (so->so_options & SO_LINGER) {
|
| 196 |
|
|
if ((so->so_state & SS_ISDISCONNECTING) &&
|
| 197 |
|
|
(so->so_state & SS_NBIO))
|
| 198 |
|
|
goto drop;
|
| 199 |
|
|
while (so->so_state & SS_ISCONNECTED) {
|
| 200 |
|
|
soconnsleep (so);
|
| 201 |
|
|
}
|
| 202 |
|
|
}
|
| 203 |
|
|
}
|
| 204 |
|
|
drop:
|
| 205 |
|
|
if (so->so_pcb) {
|
| 206 |
|
|
int error2 = (*so->so_proto->pr_usrreqs->pru_detach)(so);
|
| 207 |
|
|
if (error == 0)
|
| 208 |
|
|
error = error2;
|
| 209 |
|
|
}
|
| 210 |
|
|
discard:
|
| 211 |
|
|
if (so->so_state & SS_NOFDREF)
|
| 212 |
|
|
panic("soclose: NOFDREF");
|
| 213 |
|
|
so->so_state |= SS_NOFDREF;
|
| 214 |
|
|
sofree(so);
|
| 215 |
|
|
splx(s);
|
| 216 |
|
|
return (error);
|
| 217 |
|
|
}
|
| 218 |
|
|
|
| 219 |
|
|
/*
|
| 220 |
|
|
* Must be called at splnet...
|
| 221 |
|
|
*/
|
| 222 |
|
|
int
|
| 223 |
|
|
soabort(so)
|
| 224 |
|
|
struct socket *so;
|
| 225 |
|
|
{
|
| 226 |
|
|
|
| 227 |
|
|
return (*so->so_proto->pr_usrreqs->pru_abort)(so);
|
| 228 |
|
|
}
|
| 229 |
|
|
|
| 230 |
|
|
int
|
| 231 |
|
|
soaccept(so, nam)
|
| 232 |
|
|
register struct socket *so;
|
| 233 |
|
|
struct mbuf *nam;
|
| 234 |
|
|
{
|
| 235 |
|
|
int s = splnet();
|
| 236 |
|
|
int error;
|
| 237 |
|
|
|
| 238 |
|
|
if ((so->so_state & SS_NOFDREF) == 0)
|
| 239 |
|
|
panic("soaccept: !NOFDREF");
|
| 240 |
|
|
so->so_state &= ~SS_NOFDREF;
|
| 241 |
|
|
error = (*so->so_proto->pr_usrreqs->pru_accept)(so, nam);
|
| 242 |
|
|
splx(s);
|
| 243 |
|
|
return (error);
|
| 244 |
|
|
}
|
| 245 |
|
|
|
| 246 |
|
|
int
|
| 247 |
|
|
soconnect(so, nam)
|
| 248 |
|
|
register struct socket *so;
|
| 249 |
|
|
struct mbuf *nam;
|
| 250 |
|
|
{
|
| 251 |
|
|
int s;
|
| 252 |
|
|
int error;
|
| 253 |
|
|
|
| 254 |
|
|
if (so->so_options & SO_ACCEPTCONN)
|
| 255 |
|
|
return (EOPNOTSUPP);
|
| 256 |
|
|
s = splnet();
|
| 257 |
|
|
/*
|
| 258 |
|
|
* If protocol is connection-based, can only connect once.
|
| 259 |
|
|
* Otherwise, if connected, try to disconnect first.
|
| 260 |
|
|
* This allows user to disconnect by connecting to, e.g.,
|
| 261 |
|
|
* a null address.
|
| 262 |
|
|
*/
|
| 263 |
|
|
if (so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING) &&
|
| 264 |
|
|
((so->so_proto->pr_flags & PR_CONNREQUIRED) ||
|
| 265 |
|
|
(error = sodisconnect(so))))
|
| 266 |
|
|
error = EISCONN;
|
| 267 |
|
|
else
|
| 268 |
|
|
error = (*so->so_proto->pr_usrreqs->pru_connect)(so, nam);
|
| 269 |
|
|
splx(s);
|
| 270 |
|
|
return (error);
|
| 271 |
|
|
}
|
| 272 |
|
|
|
| 273 |
|
|
int
|
| 274 |
|
|
soconnect2(so1, so2)
|
| 275 |
|
|
register struct socket *so1;
|
| 276 |
|
|
struct socket *so2;
|
| 277 |
|
|
{
|
| 278 |
|
|
int s = splnet();
|
| 279 |
|
|
int error;
|
| 280 |
|
|
|
| 281 |
|
|
error = (*so1->so_proto->pr_usrreqs->pru_connect2)(so1, so2);
|
| 282 |
|
|
splx(s);
|
| 283 |
|
|
return (error);
|
| 284 |
|
|
}
|
| 285 |
|
|
|
| 286 |
|
|
int
|
| 287 |
|
|
sodisconnect(so)
|
| 288 |
|
|
register struct socket *so;
|
| 289 |
|
|
{
|
| 290 |
|
|
int s = splnet();
|
| 291 |
|
|
int error;
|
| 292 |
|
|
|
| 293 |
|
|
if ((so->so_state & SS_ISCONNECTED) == 0) {
|
| 294 |
|
|
error = ENOTCONN;
|
| 295 |
|
|
goto bad;
|
| 296 |
|
|
}
|
| 297 |
|
|
if (so->so_state & SS_ISDISCONNECTING) {
|
| 298 |
|
|
error = EALREADY;
|
| 299 |
|
|
goto bad;
|
| 300 |
|
|
}
|
| 301 |
|
|
error = (*so->so_proto->pr_usrreqs->pru_disconnect)(so);
|
| 302 |
|
|
bad:
|
| 303 |
|
|
splx(s);
|
| 304 |
|
|
return (error);
|
| 305 |
|
|
}
|
| 306 |
|
|
|
| 307 |
|
|
#define SBLOCKWAIT(f) (((f) & MSG_DONTWAIT) ? M_NOWAIT : M_WAITOK)
|
| 308 |
|
|
/*
|
| 309 |
|
|
* Send on a socket.
|
| 310 |
|
|
* If send must go all at once and message is larger than
|
| 311 |
|
|
* send buffering, then hard error.
|
| 312 |
|
|
* Lock against other senders.
|
| 313 |
|
|
* If must go all at once and not enough room now, then
|
| 314 |
|
|
* inform user that this would block and do nothing.
|
| 315 |
|
|
* Otherwise, if nonblocking, send as much as possible.
|
| 316 |
|
|
* The data to be sent is described by "uio" if nonzero,
|
| 317 |
|
|
* otherwise by the mbuf chain "top" (which must be null
|
| 318 |
|
|
* if uio is not). Data provided in mbuf chain must be small
|
| 319 |
|
|
* enough to send all at once.
|
| 320 |
|
|
*
|
| 321 |
|
|
* Returns nonzero on error, timeout or signal; callers
|
| 322 |
|
|
* must check for short counts if EINTR/ERESTART are returned.
|
| 323 |
|
|
* Data and control buffers are freed on return.
|
| 324 |
|
|
*/
|
| 325 |
|
|
int
|
| 326 |
|
|
sosend(so, addr, uio, top, control, flags)
|
| 327 |
|
|
register struct socket *so;
|
| 328 |
|
|
struct mbuf *addr;
|
| 329 |
|
|
struct uio *uio;
|
| 330 |
|
|
struct mbuf *top;
|
| 331 |
|
|
struct mbuf *control;
|
| 332 |
|
|
int flags;
|
| 333 |
|
|
{
|
| 334 |
|
|
struct mbuf **mp;
|
| 335 |
|
|
register struct mbuf *m;
|
| 336 |
|
|
register long space, len, resid;
|
| 337 |
|
|
int clen = 0, error, s, dontroute, mlen;
|
| 338 |
|
|
int atomic = sosendallatonce(so) || top;
|
| 339 |
|
|
|
| 340 |
|
|
if (uio)
|
| 341 |
|
|
resid = uio->uio_resid;
|
| 342 |
|
|
else
|
| 343 |
|
|
resid = top->m_pkthdr.len;
|
| 344 |
|
|
/*
|
| 345 |
|
|
* In theory resid should be unsigned.
|
| 346 |
|
|
* However, space must be signed, as it might be less than 0
|
| 347 |
|
|
* if we over-committed, and we must use a signed comparison
|
| 348 |
|
|
* of space and resid. On the other hand, a negative resid
|
| 349 |
|
|
* causes us to loop sending 0-length segments to the protocol.
|
| 350 |
|
|
*
|
| 351 |
|
|
* Also check to make sure that MSG_EOR isn't used on SOCK_STREAM
|
| 352 |
|
|
* type sockets since that's an error.
|
| 353 |
|
|
*/
|
| 354 |
|
|
if ((resid < 0) || (so->so_type == SOCK_STREAM && (flags & MSG_EOR))) {
|
| 355 |
|
|
error = EINVAL;
|
| 356 |
|
|
goto out;
|
| 357 |
|
|
}
|
| 358 |
|
|
|
| 359 |
|
|
dontroute =
|
| 360 |
|
|
(flags & MSG_DONTROUTE) && (so->so_options & SO_DONTROUTE) == 0 &&
|
| 361 |
|
|
(so->so_proto->pr_flags & PR_ATOMIC);
|
| 362 |
|
|
if (control)
|
| 363 |
|
|
clen = control->m_len;
|
| 364 |
|
|
#define snderr(errno) { error = errno; splx(s); goto release; }
|
| 365 |
|
|
|
| 366 |
|
|
restart:
|
| 367 |
|
|
error = sblock(&so->so_snd, SBLOCKWAIT(flags));
|
| 368 |
|
|
if (error)
|
| 369 |
|
|
goto out;
|
| 370 |
|
|
do {
|
| 371 |
|
|
s = splnet();
|
| 372 |
|
|
if (so->so_state & SS_CANTSENDMORE)
|
| 373 |
|
|
snderr(EPIPE);
|
| 374 |
|
|
if (so->so_error) {
|
| 375 |
|
|
error = so->so_error;
|
| 376 |
|
|
so->so_error = 0;
|
| 377 |
|
|
splx(s);
|
| 378 |
|
|
goto release;
|
| 379 |
|
|
}
|
| 380 |
|
|
if ((so->so_state & SS_ISCONNECTED) == 0) {
|
| 381 |
|
|
/*
|
| 382 |
|
|
* `sendto' and `sendmsg' is allowed on a connection-
|
| 383 |
|
|
* based socket if it supports implied connect.
|
| 384 |
|
|
* Return ENOTCONN if not connected and no address is
|
| 385 |
|
|
* supplied.
|
| 386 |
|
|
*/
|
| 387 |
|
|
if ((so->so_proto->pr_flags & PR_CONNREQUIRED) &&
|
| 388 |
|
|
(so->so_proto->pr_flags & PR_IMPLOPCL) == 0) {
|
| 389 |
|
|
if ((so->so_state & SS_ISCONFIRMING) == 0 &&
|
| 390 |
|
|
!(resid == 0 && clen != 0))
|
| 391 |
|
|
snderr(ENOTCONN);
|
| 392 |
|
|
} else if (addr == 0)
|
| 393 |
|
|
snderr(so->so_proto->pr_flags & PR_CONNREQUIRED ?
|
| 394 |
|
|
ENOTCONN : EDESTADDRREQ);
|
| 395 |
|
|
}
|
| 396 |
|
|
space = sbspace(&so->so_snd);
|
| 397 |
|
|
if (flags & MSG_OOB)
|
| 398 |
|
|
space += 1024;
|
| 399 |
|
|
if ((atomic && resid > so->so_snd.sb_hiwat) ||
|
| 400 |
|
|
clen > so->so_snd.sb_hiwat)
|
| 401 |
|
|
snderr(EMSGSIZE);
|
| 402 |
|
|
if (space < resid + clen && uio &&
|
| 403 |
|
|
(atomic || space < so->so_snd.sb_lowat || space < clen)) {
|
| 404 |
|
|
if (so->so_state & SS_NBIO)
|
| 405 |
|
|
snderr(EWOULDBLOCK);
|
| 406 |
|
|
sbunlock(&so->so_snd);
|
| 407 |
|
|
error = sbwait(&so->so_snd);
|
| 408 |
|
|
splx(s);
|
| 409 |
|
|
if (error)
|
| 410 |
|
|
goto out;
|
| 411 |
|
|
goto restart;
|
| 412 |
|
|
}
|
| 413 |
|
|
splx(s);
|
| 414 |
|
|
mp = ⊤
|
| 415 |
|
|
space -= clen;
|
| 416 |
|
|
do {
|
| 417 |
|
|
if (uio == NULL) {
|
| 418 |
|
|
/*
|
| 419 |
|
|
* Data is prepackaged in "top".
|
| 420 |
|
|
*/
|
| 421 |
|
|
resid = 0;
|
| 422 |
|
|
if (flags & MSG_EOR)
|
| 423 |
|
|
top->m_flags |= M_EOR;
|
| 424 |
|
|
} else do {
|
| 425 |
|
|
if (top == 0) {
|
| 426 |
|
|
MGETHDR(m, M_WAIT, MT_DATA);
|
| 427 |
|
|
mlen = MHLEN;
|
| 428 |
|
|
m->m_pkthdr.len = 0;
|
| 429 |
|
|
m->m_pkthdr.rcvif = (struct ifnet *)0;
|
| 430 |
|
|
} else {
|
| 431 |
|
|
MGET(m, M_WAIT, MT_DATA);
|
| 432 |
|
|
mlen = MLEN;
|
| 433 |
|
|
}
|
| 434 |
|
|
if (resid >= MINCLSIZE) {
|
| 435 |
|
|
MCLGET(m, M_WAIT);
|
| 436 |
|
|
if ((m->m_flags & M_EXT) == 0)
|
| 437 |
|
|
goto nopages;
|
| 438 |
|
|
mlen = MCLBYTES;
|
| 439 |
|
|
len = min(min(mlen, resid), space);
|
| 440 |
|
|
} else {
|
| 441 |
|
|
nopages:
|
| 442 |
|
|
len = min(min(mlen, resid), space);
|
| 443 |
|
|
/*
|
| 444 |
|
|
* For datagram protocols, leave room
|
| 445 |
|
|
* for protocol headers in first mbuf.
|
| 446 |
|
|
*/
|
| 447 |
|
|
if (atomic && top == 0 && len < mlen)
|
| 448 |
|
|
MH_ALIGN(m, len);
|
| 449 |
|
|
}
|
| 450 |
|
|
space -= len;
|
| 451 |
|
|
error = uiomove(mtod(m, caddr_t), (int)len, uio);
|
| 452 |
|
|
resid = uio->uio_resid;
|
| 453 |
|
|
m->m_len = len;
|
| 454 |
|
|
*mp = m;
|
| 455 |
|
|
top->m_pkthdr.len += len;
|
| 456 |
|
|
if (error)
|
| 457 |
|
|
goto release;
|
| 458 |
|
|
mp = &m->m_next;
|
| 459 |
|
|
if (resid <= 0) {
|
| 460 |
|
|
if (flags & MSG_EOR)
|
| 461 |
|
|
top->m_flags |= M_EOR;
|
| 462 |
|
|
break;
|
| 463 |
|
|
}
|
| 464 |
|
|
} while (space > 0 && atomic);
|
| 465 |
|
|
if (dontroute)
|
| 466 |
|
|
so->so_options |= SO_DONTROUTE;
|
| 467 |
|
|
s = splnet(); /* XXX */
|
| 468 |
|
|
error = (*so->so_proto->pr_usrreqs->pru_send)(so,
|
| 469 |
|
|
(flags & MSG_OOB) ? PRUS_OOB :
|
| 470 |
|
|
/*
|
| 471 |
|
|
* If the user set MSG_EOF, the protocol
|
| 472 |
|
|
* understands this flag and nothing left to
|
| 473 |
|
|
* send then use PRU_SEND_EOF instead of PRU_SEND.
|
| 474 |
|
|
*/
|
| 475 |
|
|
((flags & MSG_EOF) &&
|
| 476 |
|
|
(so->so_proto->pr_flags & PR_IMPLOPCL) &&
|
| 477 |
|
|
(resid <= 0)) ?
|
| 478 |
|
|
PRUS_EOF : 0,
|
| 479 |
|
|
top, addr, control);
|
| 480 |
|
|
splx(s);
|
| 481 |
|
|
if (dontroute)
|
| 482 |
|
|
so->so_options &= ~SO_DONTROUTE;
|
| 483 |
|
|
clen = 0;
|
| 484 |
|
|
control = 0;
|
| 485 |
|
|
top = 0;
|
| 486 |
|
|
mp = ⊤
|
| 487 |
|
|
if (error)
|
| 488 |
|
|
goto release;
|
| 489 |
|
|
} while (resid && space > 0);
|
| 490 |
|
|
} while (resid);
|
| 491 |
|
|
|
| 492 |
|
|
release:
|
| 493 |
|
|
sbunlock(&so->so_snd);
|
| 494 |
|
|
out:
|
| 495 |
|
|
if (top)
|
| 496 |
|
|
m_freem(top);
|
| 497 |
|
|
if (control)
|
| 498 |
|
|
m_freem(control);
|
| 499 |
|
|
return (error);
|
| 500 |
|
|
}
|
| 501 |
|
|
|
| 502 |
|
|
/*
|
| 503 |
|
|
* Implement receive operations on a socket.
|
| 504 |
|
|
* We depend on the way that records are added to the sockbuf
|
| 505 |
|
|
* by sbappend*. In particular, each record (mbufs linked through m_next)
|
| 506 |
|
|
* must begin with an address if the protocol so specifies,
|
| 507 |
|
|
* followed by an optional mbuf or mbufs containing ancillary data,
|
| 508 |
|
|
* and then zero or more mbufs of data.
|
| 509 |
|
|
* In order to avoid blocking network interrupts for the entire time here,
|
| 510 |
|
|
* we splx() while doing the actual copy to user space.
|
| 511 |
|
|
* Although the sockbuf is locked, new data may still be appended,
|
| 512 |
|
|
* and thus we must maintain consistency of the sockbuf during that time.
|
| 513 |
|
|
*
|
| 514 |
|
|
* The caller may receive the data as a single mbuf chain by supplying
|
| 515 |
|
|
* an mbuf **mp0 for use in returning the chain. The uio is then used
|
| 516 |
|
|
* only for the count in uio_resid.
|
| 517 |
|
|
*/
|
| 518 |
|
|
int
|
| 519 |
|
|
soreceive(so, paddr, uio, mp0, controlp, flagsp)
|
| 520 |
|
|
register struct socket *so;
|
| 521 |
|
|
struct mbuf **paddr;
|
| 522 |
|
|
struct uio *uio;
|
| 523 |
|
|
struct mbuf **mp0;
|
| 524 |
|
|
struct mbuf **controlp;
|
| 525 |
|
|
int *flagsp;
|
| 526 |
|
|
{
|
| 527 |
|
|
register struct mbuf *m, **mp;
|
| 528 |
|
|
register int flags, len, error, s, offset;
|
| 529 |
|
|
struct protosw *pr = so->so_proto;
|
| 530 |
|
|
struct mbuf *nextrecord;
|
| 531 |
|
|
int moff, type = 0;
|
| 532 |
|
|
int orig_resid = uio->uio_resid;
|
| 533 |
|
|
|
| 534 |
|
|
mp = mp0;
|
| 535 |
|
|
if (paddr)
|
| 536 |
|
|
*paddr = 0;
|
| 537 |
|
|
if (controlp)
|
| 538 |
|
|
*controlp = 0;
|
| 539 |
|
|
if (flagsp)
|
| 540 |
|
|
flags = *flagsp &~ MSG_EOR;
|
| 541 |
|
|
else
|
| 542 |
|
|
flags = 0;
|
| 543 |
|
|
if (flags & MSG_OOB) {
|
| 544 |
|
|
m = m_get(M_WAIT, MT_DATA);
|
| 545 |
|
|
error = (*pr->pr_usrreqs->pru_rcvoob)(so, m, flags & MSG_PEEK);
|
| 546 |
|
|
if (error)
|
| 547 |
|
|
goto bad;
|
| 548 |
|
|
do {
|
| 549 |
|
|
error = uiomove(mtod(m, caddr_t),
|
| 550 |
|
|
(int) min(uio->uio_resid, m->m_len), uio);
|
| 551 |
|
|
m = m_free(m);
|
| 552 |
|
|
} while (uio->uio_resid && error == 0 && m);
|
| 553 |
|
|
bad:
|
| 554 |
|
|
if (m)
|
| 555 |
|
|
m_freem(m);
|
| 556 |
|
|
return (error);
|
| 557 |
|
|
}
|
| 558 |
|
|
if (mp)
|
| 559 |
|
|
*mp = (struct mbuf *)0;
|
| 560 |
|
|
if (so->so_state & SS_ISCONFIRMING && uio->uio_resid)
|
| 561 |
|
|
(*pr->pr_usrreqs->pru_rcvd)(so, 0);
|
| 562 |
|
|
|
| 563 |
|
|
restart:
|
| 564 |
|
|
error = sblock(&so->so_rcv, SBLOCKWAIT(flags));
|
| 565 |
|
|
if (error)
|
| 566 |
|
|
return (error);
|
| 567 |
|
|
s = splnet();
|
| 568 |
|
|
|
| 569 |
|
|
m = so->so_rcv.sb_mb;
|
| 570 |
|
|
/*
|
| 571 |
|
|
* If we have less data than requested, block awaiting more
|
| 572 |
|
|
* (subject to any timeout) if:
|
| 573 |
|
|
* 1. the current count is less than the low water mark, or
|
| 574 |
|
|
* 2. MSG_WAITALL is set, and it is possible to do the entire
|
| 575 |
|
|
* receive operation at once if we block (resid <= hiwat).
|
| 576 |
|
|
* 3. MSG_DONTWAIT is not set
|
| 577 |
|
|
* If MSG_WAITALL is set but resid is larger than the receive buffer,
|
| 578 |
|
|
* we have to do the receive in sections, and thus risk returning
|
| 579 |
|
|
* a short count if a timeout or signal occurs after we start.
|
| 580 |
|
|
*/
|
| 581 |
|
|
if (m == 0 || (((flags & MSG_DONTWAIT) == 0 &&
|
| 582 |
|
|
so->so_rcv.sb_cc < uio->uio_resid) &&
|
| 583 |
|
|
(so->so_rcv.sb_cc < so->so_rcv.sb_lowat ||
|
| 584 |
|
|
((flags & MSG_WAITALL) && uio->uio_resid <= so->so_rcv.sb_hiwat)) &&
|
| 585 |
|
|
m->m_nextpkt == 0 && (pr->pr_flags & PR_ATOMIC) == 0)) {
|
| 586 |
|
|
#ifdef DIAGNOSTIC
|
| 587 |
|
|
if (m == 0 && so->so_rcv.sb_cc)
|
| 588 |
|
|
panic("receive 1");
|
| 589 |
|
|
#endif
|
| 590 |
|
|
if (so->so_error) {
|
| 591 |
|
|
if (m)
|
| 592 |
|
|
goto dontblock;
|
| 593 |
|
|
error = so->so_error;
|
| 594 |
|
|
if ((flags & MSG_PEEK) == 0)
|
| 595 |
|
|
so->so_error = 0;
|
| 596 |
|
|
goto release;
|
| 597 |
|
|
}
|
| 598 |
|
|
if (so->so_state & SS_CANTRCVMORE) {
|
| 599 |
|
|
if (m)
|
| 600 |
|
|
goto dontblock;
|
| 601 |
|
|
else
|
| 602 |
|
|
goto release;
|
| 603 |
|
|
}
|
| 604 |
|
|
for (; m; m = m->m_next)
|
| 605 |
|
|
if (m->m_type == MT_OOBDATA || (m->m_flags & M_EOR)) {
|
| 606 |
|
|
m = so->so_rcv.sb_mb;
|
| 607 |
|
|
goto dontblock;
|
| 608 |
|
|
}
|
| 609 |
|
|
if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) == 0 &&
|
| 610 |
|
|
(so->so_proto->pr_flags & PR_CONNREQUIRED)) {
|
| 611 |
|
|
error = ENOTCONN;
|
| 612 |
|
|
goto release;
|
| 613 |
|
|
}
|
| 614 |
|
|
if (uio->uio_resid == 0)
|
| 615 |
|
|
goto release;
|
| 616 |
|
|
if ((so->so_state & SS_NBIO) || (flags & MSG_DONTWAIT)) {
|
| 617 |
|
|
error = EWOULDBLOCK;
|
| 618 |
|
|
goto release;
|
| 619 |
|
|
}
|
| 620 |
|
|
sbunlock(&so->so_rcv);
|
| 621 |
|
|
error = sbwait(&so->so_rcv);
|
| 622 |
|
|
splx(s);
|
| 623 |
|
|
if (error)
|
| 624 |
|
|
return (error);
|
| 625 |
|
|
goto restart;
|
| 626 |
|
|
}
|
| 627 |
|
|
dontblock:
|
| 628 |
|
|
nextrecord = m->m_nextpkt;
|
| 629 |
|
|
if (pr->pr_flags & PR_ADDR) {
|
| 630 |
|
|
#ifdef DIAGNOSTIC
|
| 631 |
|
|
if (m->m_type != MT_SONAME)
|
| 632 |
|
|
panic("receive 1a");
|
| 633 |
|
|
#endif
|
| 634 |
|
|
orig_resid = 0;
|
| 635 |
|
|
if (flags & MSG_PEEK) {
|
| 636 |
|
|
if (paddr)
|
| 637 |
|
|
*paddr = m_copy(m, 0, m->m_len);
|
| 638 |
|
|
m = m->m_next;
|
| 639 |
|
|
} else {
|
| 640 |
|
|
sbfree(&so->so_rcv, m);
|
| 641 |
|
|
if (paddr) {
|
| 642 |
|
|
*paddr = m;
|
| 643 |
|
|
so->so_rcv.sb_mb = m->m_next;
|
| 644 |
|
|
m->m_next = 0;
|
| 645 |
|
|
m = so->so_rcv.sb_mb;
|
| 646 |
|
|
} else {
|
| 647 |
|
|
MFREE(m, so->so_rcv.sb_mb);
|
| 648 |
|
|
m = so->so_rcv.sb_mb;
|
| 649 |
|
|
}
|
| 650 |
|
|
}
|
| 651 |
|
|
}
|
| 652 |
|
|
while (m && m->m_type == MT_CONTROL && error == 0) {
|
| 653 |
|
|
if (flags & MSG_PEEK) {
|
| 654 |
|
|
if (controlp)
|
| 655 |
|
|
*controlp = m_copy(m, 0, m->m_len);
|
| 656 |
|
|
m = m->m_next;
|
| 657 |
|
|
} else {
|
| 658 |
|
|
sbfree(&so->so_rcv, m);
|
| 659 |
|
|
if (controlp) {
|
| 660 |
|
|
if (pr->pr_domain->dom_externalize &&
|
| 661 |
|
|
mtod(m, struct cmsghdr *)->cmsg_type ==
|
| 662 |
|
|
SCM_RIGHTS)
|
| 663 |
|
|
error = (*pr->pr_domain->dom_externalize)(m);
|
| 664 |
|
|
*controlp = m;
|
| 665 |
|
|
so->so_rcv.sb_mb = m->m_next;
|
| 666 |
|
|
m->m_next = 0;
|
| 667 |
|
|
m = so->so_rcv.sb_mb;
|
| 668 |
|
|
} else {
|
| 669 |
|
|
MFREE(m, so->so_rcv.sb_mb);
|
| 670 |
|
|
m = so->so_rcv.sb_mb;
|
| 671 |
|
|
}
|
| 672 |
|
|
}
|
| 673 |
|
|
if (controlp) {
|
| 674 |
|
|
orig_resid = 0;
|
| 675 |
|
|
controlp = &(*controlp)->m_next;
|
| 676 |
|
|
}
|
| 677 |
|
|
}
|
| 678 |
|
|
if (m) {
|
| 679 |
|
|
if ((flags & MSG_PEEK) == 0)
|
| 680 |
|
|
m->m_nextpkt = nextrecord;
|
| 681 |
|
|
type = m->m_type;
|
| 682 |
|
|
if (type == MT_OOBDATA)
|
| 683 |
|
|
flags |= MSG_OOB;
|
| 684 |
|
|
}
|
| 685 |
|
|
moff = 0;
|
| 686 |
|
|
offset = 0;
|
| 687 |
|
|
while (m && uio->uio_resid > 0 && error == 0) {
|
| 688 |
|
|
if (m->m_type == MT_OOBDATA) {
|
| 689 |
|
|
if (type != MT_OOBDATA)
|
| 690 |
|
|
break;
|
| 691 |
|
|
} else if (type == MT_OOBDATA)
|
| 692 |
|
|
break;
|
| 693 |
|
|
#ifdef DIAGNOSTIC
|
| 694 |
|
|
else if (m->m_type != MT_DATA && m->m_type != MT_HEADER)
|
| 695 |
|
|
panic("receive 3");
|
| 696 |
|
|
#endif
|
| 697 |
|
|
so->so_state &= ~SS_RCVATMARK;
|
| 698 |
|
|
len = uio->uio_resid;
|
| 699 |
|
|
if (so->so_oobmark && len > so->so_oobmark - offset)
|
| 700 |
|
|
len = so->so_oobmark - offset;
|
| 701 |
|
|
if (len > m->m_len - moff)
|
| 702 |
|
|
len = m->m_len - moff;
|
| 703 |
|
|
/*
|
| 704 |
|
|
* If mp is set, just pass back the mbufs.
|
| 705 |
|
|
* Otherwise copy them out via the uio, then free.
|
| 706 |
|
|
* Sockbuf must be consistent here (points to current mbuf,
|
| 707 |
|
|
* it points to next record) when we drop priority;
|
| 708 |
|
|
* we must note any additions to the sockbuf when we
|
| 709 |
|
|
* block interrupts again.
|
| 710 |
|
|
*/
|
| 711 |
|
|
if (mp == 0) {
|
| 712 |
|
|
splx(s);
|
| 713 |
|
|
error = uiomove(mtod(m, caddr_t) + moff, (int)len, uio);
|
| 714 |
|
|
s = splnet();
|
| 715 |
|
|
if (error)
|
| 716 |
|
|
goto release;
|
| 717 |
|
|
} else
|
| 718 |
|
|
uio->uio_resid -= len;
|
| 719 |
|
|
if (len == m->m_len - moff) {
|
| 720 |
|
|
if (m->m_flags & M_EOR)
|
| 721 |
|
|
flags |= MSG_EOR;
|
| 722 |
|
|
if (flags & MSG_PEEK) {
|
| 723 |
|
|
m = m->m_next;
|
| 724 |
|
|
moff = 0;
|
| 725 |
|
|
} else {
|
| 726 |
|
|
nextrecord = m->m_nextpkt;
|
| 727 |
|
|
sbfree(&so->so_rcv, m);
|
| 728 |
|
|
if (mp) {
|
| 729 |
|
|
*mp = m;
|
| 730 |
|
|
mp = &m->m_next;
|
| 731 |
|
|
so->so_rcv.sb_mb = m = m->m_next;
|
| 732 |
|
|
*mp = (struct mbuf *)0;
|
| 733 |
|
|
} else {
|
| 734 |
|
|
MFREE(m, so->so_rcv.sb_mb);
|
| 735 |
|
|
m = so->so_rcv.sb_mb;
|
| 736 |
|
|
}
|
| 737 |
|
|
if (m)
|
| 738 |
|
|
m->m_nextpkt = nextrecord;
|
| 739 |
|
|
}
|
| 740 |
|
|
} else {
|
| 741 |
|
|
if (flags & MSG_PEEK)
|
| 742 |
|
|
moff += len;
|
| 743 |
|
|
else {
|
| 744 |
|
|
if (mp)
|
| 745 |
|
|
*mp = m_copym(m, 0, len, M_WAIT);
|
| 746 |
|
|
m->m_data += len;
|
| 747 |
|
|
m->m_len -= len;
|
| 748 |
|
|
so->so_rcv.sb_cc -= len;
|
| 749 |
|
|
}
|
| 750 |
|
|
}
|
| 751 |
|
|
if (so->so_oobmark) {
|
| 752 |
|
|
if ((flags & MSG_PEEK) == 0) {
|
| 753 |
|
|
so->so_oobmark -= len;
|
| 754 |
|
|
if (so->so_oobmark == 0) {
|
| 755 |
|
|
so->so_state |= SS_RCVATMARK;
|
| 756 |
|
|
break;
|
| 757 |
|
|
}
|
| 758 |
|
|
} else {
|
| 759 |
|
|
offset += len;
|
| 760 |
|
|
if (offset == so->so_oobmark)
|
| 761 |
|
|
break;
|
| 762 |
|
|
}
|
| 763 |
|
|
}
|
| 764 |
|
|
if (flags & MSG_EOR)
|
| 765 |
|
|
break;
|
| 766 |
|
|
/*
|
| 767 |
|
|
* If the MSG_WAITALL flag is set (for non-atomic socket),
|
| 768 |
|
|
* we must not quit until "uio->uio_resid == 0" or an error
|
| 769 |
|
|
* termination. If a signal/timeout occurs, return
|
| 770 |
|
|
* with a short count but without error.
|
| 771 |
|
|
* Keep sockbuf locked against other readers.
|
| 772 |
|
|
*/
|
| 773 |
|
|
while (flags & MSG_WAITALL && m == 0 && uio->uio_resid > 0 &&
|
| 774 |
|
|
!sosendallatonce(so) && !nextrecord) {
|
| 775 |
|
|
if (so->so_error || so->so_state & SS_CANTRCVMORE)
|
| 776 |
|
|
break;
|
| 777 |
|
|
error = sbwait(&so->so_rcv);
|
| 778 |
|
|
if (error) {
|
| 779 |
|
|
sbunlock(&so->so_rcv);
|
| 780 |
|
|
splx(s);
|
| 781 |
|
|
return (0);
|
| 782 |
|
|
}
|
| 783 |
|
|
m = so->so_rcv.sb_mb;
|
| 784 |
|
|
if (m)
|
| 785 |
|
|
nextrecord = m->m_nextpkt;
|
| 786 |
|
|
}
|
| 787 |
|
|
}
|
| 788 |
|
|
|
| 789 |
|
|
if (m && pr->pr_flags & PR_ATOMIC) {
|
| 790 |
|
|
flags |= MSG_TRUNC;
|
| 791 |
|
|
if ((flags & MSG_PEEK) == 0)
|
| 792 |
|
|
(void) sbdroprecord(&so->so_rcv);
|
| 793 |
|
|
}
|
| 794 |
|
|
if ((flags & MSG_PEEK) == 0) {
|
| 795 |
|
|
if (m == 0)
|
| 796 |
|
|
so->so_rcv.sb_mb = nextrecord;
|
| 797 |
|
|
if (pr->pr_flags & PR_WANTRCVD && so->so_pcb)
|
| 798 |
|
|
(*pr->pr_usrreqs->pru_rcvd)(so, flags);
|
| 799 |
|
|
}
|
| 800 |
|
|
if (orig_resid == uio->uio_resid && orig_resid &&
|
| 801 |
|
|
(flags & MSG_EOR) == 0 && (so->so_state & SS_CANTRCVMORE) == 0) {
|
| 802 |
|
|
sbunlock(&so->so_rcv);
|
| 803 |
|
|
splx(s);
|
| 804 |
|
|
goto restart;
|
| 805 |
|
|
}
|
| 806 |
|
|
|
| 807 |
|
|
if (flagsp)
|
| 808 |
|
|
*flagsp |= flags;
|
| 809 |
|
|
release:
|
| 810 |
|
|
sbunlock(&so->so_rcv);
|
| 811 |
|
|
splx(s);
|
| 812 |
|
|
return (error);
|
| 813 |
|
|
}
|
| 814 |
|
|
|
| 815 |
|
|
int
|
| 816 |
|
|
soshutdown(so, how)
|
| 817 |
|
|
register struct socket *so;
|
| 818 |
|
|
register int how;
|
| 819 |
|
|
{
|
| 820 |
|
|
register struct protosw *pr = so->so_proto;
|
| 821 |
|
|
|
| 822 |
|
|
how++;
|
| 823 |
|
|
if (how & FREAD)
|
| 824 |
|
|
sorflush(so);
|
| 825 |
|
|
if (how & FWRITE)
|
| 826 |
|
|
return ((*pr->pr_usrreqs->pru_shutdown)(so));
|
| 827 |
|
|
return (0);
|
| 828 |
|
|
}
|
| 829 |
|
|
|
| 830 |
|
|
void
|
| 831 |
|
|
sorflush(so)
|
| 832 |
|
|
register struct socket *so;
|
| 833 |
|
|
{
|
| 834 |
|
|
register struct sockbuf *sb = &so->so_rcv;
|
| 835 |
|
|
register struct protosw *pr = so->so_proto;
|
| 836 |
|
|
register int s;
|
| 837 |
|
|
struct sockbuf asb;
|
| 838 |
|
|
|
| 839 |
|
|
sb->sb_flags |= SB_NOINTR;
|
| 840 |
|
|
(void) sblock(sb, M_WAITOK);
|
| 841 |
|
|
s = splimp();
|
| 842 |
|
|
socantrcvmore(so);
|
| 843 |
|
|
sbunlock(sb);
|
| 844 |
|
|
asb = *sb;
|
| 845 |
|
|
bzero((caddr_t)sb, sizeof (*sb));
|
| 846 |
|
|
splx(s);
|
| 847 |
|
|
if (pr->pr_flags & PR_RIGHTS && pr->pr_domain->dom_dispose)
|
| 848 |
|
|
(*pr->pr_domain->dom_dispose)(asb.sb_mb);
|
| 849 |
|
|
sbrelease(&asb);
|
| 850 |
|
|
}
|
| 851 |
|
|
|
| 852 |
|
|
int
|
| 853 |
|
|
sosetopt(so, level, optname, m0)
|
| 854 |
|
|
register struct socket *so;
|
| 855 |
|
|
int level, optname;
|
| 856 |
|
|
struct mbuf *m0;
|
| 857 |
|
|
{
|
| 858 |
|
|
int error = 0;
|
| 859 |
|
|
register struct mbuf *m = m0;
|
| 860 |
|
|
|
| 861 |
|
|
if (level != SOL_SOCKET) {
|
| 862 |
|
|
if (so->so_proto && so->so_proto->pr_ctloutput)
|
| 863 |
|
|
return ((*so->so_proto->pr_ctloutput)
|
| 864 |
|
|
(PRCO_SETOPT, so, level, optname, &m0));
|
| 865 |
|
|
error = ENOPROTOOPT;
|
| 866 |
|
|
} else {
|
| 867 |
|
|
switch (optname) {
|
| 868 |
|
|
|
| 869 |
|
|
case SO_LINGER:
|
| 870 |
|
|
if (m == NULL || m->m_len != sizeof (struct linger)) {
|
| 871 |
|
|
error = EINVAL;
|
| 872 |
|
|
goto bad;
|
| 873 |
|
|
}
|
| 874 |
|
|
so->so_linger = mtod(m, struct linger *)->l_linger;
|
| 875 |
|
|
/* fall thru... */
|
| 876 |
|
|
|
| 877 |
|
|
case SO_DEBUG:
|
| 878 |
|
|
case SO_KEEPALIVE:
|
| 879 |
|
|
case SO_DONTROUTE:
|
| 880 |
|
|
case SO_USELOOPBACK:
|
| 881 |
|
|
case SO_BROADCAST:
|
| 882 |
|
|
case SO_REUSEADDR:
|
| 883 |
|
|
case SO_REUSEPORT:
|
| 884 |
|
|
case SO_OOBINLINE:
|
| 885 |
|
|
case SO_TIMESTAMP:
|
| 886 |
|
|
if (m == NULL || m->m_len < sizeof (int)) {
|
| 887 |
|
|
error = EINVAL;
|
| 888 |
|
|
goto bad;
|
| 889 |
|
|
}
|
| 890 |
|
|
if (*mtod(m, int *))
|
| 891 |
|
|
so->so_options |= optname;
|
| 892 |
|
|
else
|
| 893 |
|
|
so->so_options &= ~optname;
|
| 894 |
|
|
break;
|
| 895 |
|
|
|
| 896 |
|
|
case SO_SNDBUF:
|
| 897 |
|
|
case SO_RCVBUF:
|
| 898 |
|
|
case SO_SNDLOWAT:
|
| 899 |
|
|
case SO_RCVLOWAT:
|
| 900 |
|
|
{
|
| 901 |
|
|
int optval;
|
| 902 |
|
|
|
| 903 |
|
|
if (m == NULL || m->m_len < sizeof (int)) {
|
| 904 |
|
|
error = EINVAL;
|
| 905 |
|
|
goto bad;
|
| 906 |
|
|
}
|
| 907 |
|
|
|
| 908 |
|
|
/*
|
| 909 |
|
|
* Values < 1 make no sense for any of these
|
| 910 |
|
|
* options, so disallow them.
|
| 911 |
|
|
*/
|
| 912 |
|
|
optval = *mtod(m, int *);
|
| 913 |
|
|
if (optval < 1) {
|
| 914 |
|
|
error = EINVAL;
|
| 915 |
|
|
goto bad;
|
| 916 |
|
|
}
|
| 917 |
|
|
|
| 918 |
|
|
switch (optname) {
|
| 919 |
|
|
|
| 920 |
|
|
case SO_SNDBUF:
|
| 921 |
|
|
case SO_RCVBUF:
|
| 922 |
|
|
if (sbreserve(optname == SO_SNDBUF ?
|
| 923 |
|
|
&so->so_snd : &so->so_rcv,
|
| 924 |
|
|
(u_long) optval) == 0) {
|
| 925 |
|
|
error = ENOBUFS;
|
| 926 |
|
|
goto bad;
|
| 927 |
|
|
}
|
| 928 |
|
|
break;
|
| 929 |
|
|
|
| 930 |
|
|
/*
|
| 931 |
|
|
* Make sure the low-water is never greater than
|
| 932 |
|
|
* the high-water.
|
| 933 |
|
|
*/
|
| 934 |
|
|
case SO_SNDLOWAT:
|
| 935 |
|
|
so->so_snd.sb_lowat =
|
| 936 |
|
|
(optval > so->so_snd.sb_hiwat) ?
|
| 937 |
|
|
so->so_snd.sb_hiwat : optval;
|
| 938 |
|
|
break;
|
| 939 |
|
|
case SO_RCVLOWAT:
|
| 940 |
|
|
so->so_rcv.sb_lowat =
|
| 941 |
|
|
(optval > so->so_rcv.sb_hiwat) ?
|
| 942 |
|
|
so->so_rcv.sb_hiwat : optval;
|
| 943 |
|
|
break;
|
| 944 |
|
|
}
|
| 945 |
|
|
break;
|
| 946 |
|
|
}
|
| 947 |
|
|
|
| 948 |
|
|
case SO_SNDTIMEO:
|
| 949 |
|
|
case SO_RCVTIMEO:
|
| 950 |
|
|
{
|
| 951 |
|
|
struct timeval *tv;
|
| 952 |
|
|
unsigned long val;
|
| 953 |
|
|
|
| 954 |
|
|
if (m == NULL || m->m_len < sizeof (*tv)) {
|
| 955 |
|
|
error = EINVAL;
|
| 956 |
|
|
goto bad;
|
| 957 |
|
|
}
|
| 958 |
|
|
tv = mtod(m, struct timeval *);
|
| 959 |
|
|
if (tv->tv_sec >= (ULONG_MAX - hz) / hz) {
|
| 960 |
|
|
error = EDOM;
|
| 961 |
|
|
goto bad;
|
| 962 |
|
|
}
|
| 963 |
|
|
val = tv->tv_sec * hz + tv->tv_usec / tick;
|
| 964 |
|
|
|
| 965 |
|
|
switch (optname) {
|
| 966 |
|
|
|
| 967 |
|
|
case SO_SNDTIMEO:
|
| 968 |
|
|
so->so_snd.sb_timeo = val;
|
| 969 |
|
|
break;
|
| 970 |
|
|
case SO_RCVTIMEO:
|
| 971 |
|
|
so->so_rcv.sb_timeo = val;
|
| 972 |
|
|
break;
|
| 973 |
|
|
}
|
| 974 |
|
|
break;
|
| 975 |
|
|
}
|
| 976 |
|
|
|
| 977 |
|
|
case SO_PRIVSTATE:
|
| 978 |
|
|
/* we don't care what the parameter is... */
|
| 979 |
|
|
so->so_state &= ~SS_PRIV;
|
| 980 |
|
|
break;
|
| 981 |
|
|
|
| 982 |
|
|
case SO_SNDWAKEUP:
|
| 983 |
|
|
case SO_RCVWAKEUP:
|
| 984 |
|
|
{
|
| 985 |
|
|
/* RTEMS addition. */
|
| 986 |
|
|
struct sockwakeup *sw;
|
| 987 |
|
|
struct sockbuf *sb;
|
| 988 |
|
|
|
| 989 |
|
|
if (m == NULL
|
| 990 |
|
|
|| m->m_len != sizeof (struct sockwakeup)) {
|
| 991 |
|
|
error = EINVAL;
|
| 992 |
|
|
goto bad;
|
| 993 |
|
|
}
|
| 994 |
|
|
sw = mtod(m, struct sockwakeup *);
|
| 995 |
|
|
sb = (optname == SO_SNDWAKEUP
|
| 996 |
|
|
? &so->so_snd
|
| 997 |
|
|
: &so->so_rcv);
|
| 998 |
|
|
sb->sb_wakeup = sw->sw_pfn;
|
| 999 |
|
|
sb->sb_wakeuparg = sw->sw_arg;
|
| 1000 |
|
|
if (sw->sw_pfn)
|
| 1001 |
|
|
sb->sb_flags |= SB_ASYNC;
|
| 1002 |
|
|
else
|
| 1003 |
|
|
sb->sb_flags &=~ SB_ASYNC;
|
| 1004 |
|
|
break;
|
| 1005 |
|
|
}
|
| 1006 |
|
|
|
| 1007 |
|
|
default:
|
| 1008 |
|
|
error = ENOPROTOOPT;
|
| 1009 |
|
|
break;
|
| 1010 |
|
|
}
|
| 1011 |
|
|
if (error == 0 && so->so_proto && so->so_proto->pr_ctloutput) {
|
| 1012 |
|
|
(void) ((*so->so_proto->pr_ctloutput)
|
| 1013 |
|
|
(PRCO_SETOPT, so, level, optname, &m0));
|
| 1014 |
|
|
m = NULL; /* freed by protocol */
|
| 1015 |
|
|
}
|
| 1016 |
|
|
}
|
| 1017 |
|
|
bad:
|
| 1018 |
|
|
if (m)
|
| 1019 |
|
|
(void) m_free(m);
|
| 1020 |
|
|
return (error);
|
| 1021 |
|
|
}
|
| 1022 |
|
|
|
| 1023 |
|
|
int
|
| 1024 |
|
|
sogetopt(so, level, optname, mp)
|
| 1025 |
|
|
register struct socket *so;
|
| 1026 |
|
|
int level, optname;
|
| 1027 |
|
|
struct mbuf **mp;
|
| 1028 |
|
|
{
|
| 1029 |
|
|
register struct mbuf *m;
|
| 1030 |
|
|
|
| 1031 |
|
|
if (level != SOL_SOCKET) {
|
| 1032 |
|
|
if (so->so_proto && so->so_proto->pr_ctloutput) {
|
| 1033 |
|
|
return ((*so->so_proto->pr_ctloutput)
|
| 1034 |
|
|
(PRCO_GETOPT, so, level, optname, mp));
|
| 1035 |
|
|
} else
|
| 1036 |
|
|
return (ENOPROTOOPT);
|
| 1037 |
|
|
} else {
|
| 1038 |
|
|
m = m_get(M_WAIT, MT_SOOPTS);
|
| 1039 |
|
|
m->m_len = sizeof (int);
|
| 1040 |
|
|
|
| 1041 |
|
|
switch (optname) {
|
| 1042 |
|
|
|
| 1043 |
|
|
case SO_LINGER:
|
| 1044 |
|
|
m->m_len = sizeof (struct linger);
|
| 1045 |
|
|
mtod(m, struct linger *)->l_onoff =
|
| 1046 |
|
|
so->so_options & SO_LINGER;
|
| 1047 |
|
|
mtod(m, struct linger *)->l_linger = so->so_linger;
|
| 1048 |
|
|
break;
|
| 1049 |
|
|
|
| 1050 |
|
|
case SO_USELOOPBACK:
|
| 1051 |
|
|
case SO_DONTROUTE:
|
| 1052 |
|
|
case SO_DEBUG:
|
| 1053 |
|
|
case SO_KEEPALIVE:
|
| 1054 |
|
|
case SO_REUSEADDR:
|
| 1055 |
|
|
case SO_REUSEPORT:
|
| 1056 |
|
|
case SO_BROADCAST:
|
| 1057 |
|
|
case SO_OOBINLINE:
|
| 1058 |
|
|
case SO_TIMESTAMP:
|
| 1059 |
|
|
*mtod(m, int *) = so->so_options & optname;
|
| 1060 |
|
|
break;
|
| 1061 |
|
|
|
| 1062 |
|
|
case SO_PRIVSTATE:
|
| 1063 |
|
|
*mtod(m, int *) = so->so_state & SS_PRIV;
|
| 1064 |
|
|
break;
|
| 1065 |
|
|
|
| 1066 |
|
|
case SO_TYPE:
|
| 1067 |
|
|
*mtod(m, int *) = so->so_type;
|
| 1068 |
|
|
break;
|
| 1069 |
|
|
|
| 1070 |
|
|
case SO_ERROR:
|
| 1071 |
|
|
*mtod(m, int *) = so->so_error;
|
| 1072 |
|
|
so->so_error = 0;
|
| 1073 |
|
|
break;
|
| 1074 |
|
|
|
| 1075 |
|
|
case SO_SNDBUF:
|
| 1076 |
|
|
*mtod(m, int *) = so->so_snd.sb_hiwat;
|
| 1077 |
|
|
break;
|
| 1078 |
|
|
|
| 1079 |
|
|
case SO_RCVBUF:
|
| 1080 |
|
|
*mtod(m, int *) = so->so_rcv.sb_hiwat;
|
| 1081 |
|
|
break;
|
| 1082 |
|
|
|
| 1083 |
|
|
case SO_SNDLOWAT:
|
| 1084 |
|
|
*mtod(m, int *) = so->so_snd.sb_lowat;
|
| 1085 |
|
|
break;
|
| 1086 |
|
|
|
| 1087 |
|
|
case SO_RCVLOWAT:
|
| 1088 |
|
|
*mtod(m, int *) = so->so_rcv.sb_lowat;
|
| 1089 |
|
|
break;
|
| 1090 |
|
|
|
| 1091 |
|
|
case SO_SNDTIMEO:
|
| 1092 |
|
|
case SO_RCVTIMEO:
|
| 1093 |
|
|
{
|
| 1094 |
|
|
unsigned long val = (optname == SO_SNDTIMEO ?
|
| 1095 |
|
|
so->so_snd.sb_timeo : so->so_rcv.sb_timeo);
|
| 1096 |
|
|
|
| 1097 |
|
|
m->m_len = sizeof(struct timeval);
|
| 1098 |
|
|
mtod(m, struct timeval *)->tv_sec = val / hz;
|
| 1099 |
|
|
mtod(m, struct timeval *)->tv_usec =
|
| 1100 |
|
|
(val % hz) * tick;
|
| 1101 |
|
|
break;
|
| 1102 |
|
|
}
|
| 1103 |
|
|
|
| 1104 |
|
|
case SO_SNDWAKEUP:
|
| 1105 |
|
|
case SO_RCVWAKEUP:
|
| 1106 |
|
|
{
|
| 1107 |
|
|
struct sockbuf *sb;
|
| 1108 |
|
|
struct sockwakeup *sw;
|
| 1109 |
|
|
|
| 1110 |
|
|
/* RTEMS additions. */
|
| 1111 |
|
|
sb = (optname == SO_SNDWAKEUP
|
| 1112 |
|
|
? &so->so_snd
|
| 1113 |
|
|
: &so->so_rcv);
|
| 1114 |
|
|
m->m_len = sizeof (struct sockwakeup);
|
| 1115 |
|
|
sw = mtod(m, struct sockwakeup *);
|
| 1116 |
|
|
sw->sw_pfn = sb->sb_wakeup;
|
| 1117 |
|
|
sw->sw_arg = sb->sb_wakeuparg;
|
| 1118 |
|
|
break;
|
| 1119 |
|
|
}
|
| 1120 |
|
|
|
| 1121 |
|
|
default:
|
| 1122 |
|
|
(void)m_free(m);
|
| 1123 |
|
|
return (ENOPROTOOPT);
|
| 1124 |
|
|
}
|
| 1125 |
|
|
*mp = m;
|
| 1126 |
|
|
return (0);
|
| 1127 |
|
|
}
|
| 1128 |
|
|
}
|
| 1129 |
|
|
|
| 1130 |
|
|
void
|
| 1131 |
|
|
sohasoutofband(so)
|
| 1132 |
|
|
register struct socket *so;
|
| 1133 |
|
|
{
|
| 1134 |
|
|
#if 0 /* FIXME: For now we just ignore out of band data */
|
| 1135 |
|
|
struct proc *p;
|
| 1136 |
|
|
|
| 1137 |
|
|
if (so->so_pgid < 0)
|
| 1138 |
|
|
gsignal(-so->so_pgid, SIGURG);
|
| 1139 |
|
|
else if (so->so_pgid > 0 && (p = pfind(so->so_pgid)) != 0)
|
| 1140 |
|
|
psignal(p, SIGURG);
|
| 1141 |
|
|
selwakeup(&so->so_rcv.sb_sel);
|
| 1142 |
|
|
#endif
|
| 1143 |
|
|
}
|
