Annotation of sys/kern/sys_socket.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: sys_socket.c,v 1.11 2007/02/26 23:53:33 kurt Exp $ */
! 2: /* $NetBSD: sys_socket.c,v 1.13 1995/08/12 23:59:09 mycroft Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1982, 1986, 1990, 1993
! 6: * The Regents of the University of California. All rights reserved.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: * 3. Neither the name of the University nor the names of its contributors
! 17: * may be used to endorse or promote products derived from this software
! 18: * without specific prior written permission.
! 19: *
! 20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 30: * SUCH DAMAGE.
! 31: *
! 32: * @(#)sys_socket.c 8.1 (Berkeley) 6/10/93
! 33: */
! 34:
! 35: #include <sys/param.h>
! 36: #include <sys/systm.h>
! 37: #include <sys/file.h>
! 38: #include <sys/proc.h>
! 39: #include <sys/mbuf.h>
! 40: #include <sys/protosw.h>
! 41: #include <sys/socket.h>
! 42: #include <sys/socketvar.h>
! 43: #include <sys/ioctl.h>
! 44: #include <sys/poll.h>
! 45: #include <sys/stat.h>
! 46:
! 47: #include <net/if.h>
! 48: #include <net/route.h>
! 49:
! 50: struct fileops socketops = {
! 51: soo_read, soo_write, soo_ioctl, soo_poll, soo_kqfilter,
! 52: soo_stat, soo_close
! 53: };
! 54:
! 55: /* ARGSUSED */
! 56: int
! 57: soo_read(struct file *fp, off_t *poff, struct uio *uio, struct ucred *cred)
! 58: {
! 59:
! 60: return (soreceive((struct socket *)fp->f_data, (struct mbuf **)0,
! 61: uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0));
! 62: }
! 63:
! 64: /* ARGSUSED */
! 65: int
! 66: soo_write(struct file *fp, off_t *poff, struct uio *uio, struct ucred *cred)
! 67: {
! 68:
! 69: return (sosend((struct socket *)fp->f_data, (struct mbuf *)0,
! 70: uio, (struct mbuf *)0, (struct mbuf *)0, 0));
! 71: }
! 72:
! 73: int
! 74: soo_ioctl(struct file *fp, u_long cmd, caddr_t data, struct proc *p)
! 75: {
! 76: struct socket *so = (struct socket *)fp->f_data;
! 77:
! 78: switch (cmd) {
! 79:
! 80: case FIONBIO:
! 81: if (*(int *)data)
! 82: so->so_state |= SS_NBIO;
! 83: else
! 84: so->so_state &= ~SS_NBIO;
! 85: return (0);
! 86:
! 87: case FIOASYNC:
! 88: if (*(int *)data) {
! 89: so->so_state |= SS_ASYNC;
! 90: so->so_rcv.sb_flags |= SB_ASYNC;
! 91: so->so_snd.sb_flags |= SB_ASYNC;
! 92: } else {
! 93: so->so_state &= ~SS_ASYNC;
! 94: so->so_rcv.sb_flags &= ~SB_ASYNC;
! 95: so->so_snd.sb_flags &= ~SB_ASYNC;
! 96: }
! 97: return (0);
! 98:
! 99: case FIONREAD:
! 100: *(int *)data = so->so_rcv.sb_datacc;
! 101: return (0);
! 102:
! 103: case SIOCSPGRP:
! 104: so->so_pgid = *(int *)data;
! 105: so->so_siguid = p->p_cred->p_ruid;
! 106: so->so_sigeuid = p->p_ucred->cr_uid;
! 107: return (0);
! 108:
! 109: case SIOCGPGRP:
! 110: *(int *)data = so->so_pgid;
! 111: return (0);
! 112:
! 113: case SIOCATMARK:
! 114: *(int *)data = (so->so_state&SS_RCVATMARK) != 0;
! 115: return (0);
! 116: }
! 117: /*
! 118: * Interface/routing/protocol specific ioctls:
! 119: * interface and routing ioctls should have a
! 120: * different entry since a socket's unnecessary
! 121: */
! 122: if (IOCGROUP(cmd) == 'i')
! 123: return (ifioctl(so, cmd, data, p));
! 124: if (IOCGROUP(cmd) == 'r')
! 125: return (rtioctl(cmd, data, p));
! 126: return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL,
! 127: (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0));
! 128: }
! 129:
! 130: int
! 131: soo_poll(struct file *fp, int events, struct proc *p)
! 132: {
! 133: struct socket *so = (struct socket *)fp->f_data;
! 134: int revents = 0;
! 135: int s = splsoftnet();
! 136:
! 137: if (events & (POLLIN | POLLRDNORM)) {
! 138: if (soreadable(so))
! 139: revents |= events & (POLLIN | POLLRDNORM);
! 140: }
! 141: if (events & (POLLOUT | POLLWRNORM)) {
! 142: if (sowriteable(so))
! 143: revents |= events & (POLLOUT | POLLWRNORM);
! 144: }
! 145: if (events & (POLLPRI | POLLRDBAND)) {
! 146: if (so->so_oobmark || (so->so_state & SS_RCVATMARK))
! 147: revents |= events & (POLLPRI | POLLRDBAND);
! 148: }
! 149: if (revents == 0) {
! 150: if (events & (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)) {
! 151: selrecord(p, &so->so_rcv.sb_sel);
! 152: so->so_rcv.sb_flags |= SB_SEL;
! 153: }
! 154: if (events & (POLLOUT | POLLWRNORM)) {
! 155: selrecord(p, &so->so_snd.sb_sel);
! 156: so->so_snd.sb_flags |= SB_SEL;
! 157: }
! 158: }
! 159: splx(s);
! 160: return (revents);
! 161: }
! 162:
! 163: int
! 164: soo_stat(struct file *fp, struct stat *ub, struct proc *p)
! 165: {
! 166: struct socket *so = (struct socket *)fp->f_data;
! 167:
! 168: bzero((caddr_t)ub, sizeof (*ub));
! 169: ub->st_mode = S_IFSOCK;
! 170: return ((*so->so_proto->pr_usrreq)(so, PRU_SENSE,
! 171: (struct mbuf *)ub, (struct mbuf *)0,
! 172: (struct mbuf *)0));
! 173: }
! 174:
! 175: /* ARGSUSED */
! 176: int
! 177: soo_close(struct file *fp, struct proc *p)
! 178: {
! 179: int error = 0;
! 180:
! 181: if (fp->f_data)
! 182: error = soclose((struct socket *)fp->f_data);
! 183: fp->f_data = 0;
! 184: return (error);
! 185: }
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