2c37256e5a
pr_usrreq mechanism which was poorly designed and error-prone. This commit renames pr_usrreq to pr_ousrreq so that old code which depended on it would break in an obvious manner. This commit also implements the new interface for TCP, although the old function is left as an example (#ifdef'ed out). This commit ALSO fixes a longstanding bug in the TCP timer processing (introduced by davidg on 1995/04/12) which caused timer processing on a TCB to always stop after a single timer had expired (because it misinterpreted the return value from tcp_usrreq() to indicate that the TCB had been deleted). Finally, some code related to polling has been deleted from if.c because it is not relevant t -current and doesn't look at all like my current code.
210 lines
5.2 KiB
C
210 lines
5.2 KiB
C
/*
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* Copyright (c) 1982, 1986, 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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* @(#)sys_socket.c 8.1 (Berkeley) 6/10/93
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* $Id: sys_socket.c,v 1.7 1996/03/11 15:12:43 davidg Exp $
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*/
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/file.h>
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#include <sys/mbuf.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/socketvar.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <net/if.h>
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#include <net/route.h>
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static int soo_read __P((struct file *fp, struct uio *uio,
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struct ucred *cred));
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static int soo_write __P((struct file *fp, struct uio *uio,
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struct ucred *cred));
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static int soo_close __P((struct file *fp, struct proc *p));
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struct fileops socketops =
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{ soo_read, soo_write, soo_ioctl, soo_select, soo_close };
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/* ARGSUSED */
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static int
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soo_read(fp, uio, cred)
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struct file *fp;
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struct uio *uio;
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struct ucred *cred;
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{
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return (soreceive((struct socket *)fp->f_data, (struct mbuf **)0,
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uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0));
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}
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/* ARGSUSED */
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static int
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soo_write(fp, uio, cred)
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struct file *fp;
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struct uio *uio;
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struct ucred *cred;
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{
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return (sosend((struct socket *)fp->f_data, (struct mbuf *)0,
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uio, (struct mbuf *)0, (struct mbuf *)0, 0));
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}
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int
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soo_ioctl(fp, cmd, data, p)
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struct file *fp;
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int cmd;
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register caddr_t data;
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struct proc *p;
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{
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register struct socket *so = (struct socket *)fp->f_data;
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switch (cmd) {
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case FIONBIO:
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if (*(int *)data)
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so->so_state |= SS_NBIO;
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else
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so->so_state &= ~SS_NBIO;
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return (0);
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case FIOASYNC:
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if (*(int *)data) {
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so->so_state |= SS_ASYNC;
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so->so_rcv.sb_flags |= SB_ASYNC;
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so->so_snd.sb_flags |= SB_ASYNC;
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} else {
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so->so_state &= ~SS_ASYNC;
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so->so_rcv.sb_flags &= ~SB_ASYNC;
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so->so_snd.sb_flags &= ~SB_ASYNC;
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}
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return (0);
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case FIONREAD:
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*(int *)data = so->so_rcv.sb_cc;
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return (0);
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case SIOCSPGRP:
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so->so_pgid = *(int *)data;
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return (0);
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case SIOCGPGRP:
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*(int *)data = so->so_pgid;
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return (0);
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case SIOCATMARK:
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*(int *)data = (so->so_state&SS_RCVATMARK) != 0;
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return (0);
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}
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/*
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* Interface/routing/protocol specific ioctls:
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* interface and routing ioctls should have a
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* different entry since a socket's unnecessary
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*/
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if (IOCGROUP(cmd) == 'i')
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return (ifioctl(so, cmd, data, p));
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if (IOCGROUP(cmd) == 'r')
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return (rtioctl(cmd, data, p));
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return ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 0));
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}
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int
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soo_select(fp, which, p)
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struct file *fp;
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int which;
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struct proc *p;
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{
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register struct socket *so = (struct socket *)fp->f_data;
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register int s = splnet();
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switch (which) {
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case FREAD:
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if (soreadable(so)) {
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splx(s);
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return (1);
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}
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selrecord(p, &so->so_rcv.sb_sel);
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so->so_rcv.sb_flags |= SB_SEL;
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break;
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case FWRITE:
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if (sowriteable(so)) {
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splx(s);
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return (1);
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}
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selrecord(p, &so->so_snd.sb_sel);
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so->so_snd.sb_flags |= SB_SEL;
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break;
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case 0:
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if (so->so_oobmark || (so->so_state & SS_RCVATMARK)) {
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splx(s);
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return (1);
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}
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selrecord(p, &so->so_rcv.sb_sel);
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so->so_rcv.sb_flags |= SB_SEL;
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break;
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}
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splx(s);
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return (0);
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}
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int
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soo_stat(so, ub)
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register struct socket *so;
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register struct stat *ub;
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{
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bzero((caddr_t)ub, sizeof (*ub));
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ub->st_mode = S_IFSOCK;
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return ((*so->so_proto->pr_usrreqs->pru_sense)(so, ub));
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}
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/* ARGSUSED */
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static int
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soo_close(fp, p)
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struct file *fp;
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struct proc *p;
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{
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int error = 0;
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if (fp->f_data)
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error = soclose((struct socket *)fp->f_data);
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fp->f_data = 0;
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return (error);
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}
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