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Annotation of 43BSDReno/sys/kern/sys_socket.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1982, 1986, 1990 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution is only permitted until one year after the first shipment
        !             6:  * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
        !             7:  * binary forms are permitted provided that: (1) source distributions retain
        !             8:  * this entire copyright notice and comment, and (2) distributions including
        !             9:  * binaries display the following acknowledgement:  This product includes
        !            10:  * software developed by the University of California, Berkeley and its
        !            11:  * contributors'' in the documentation or other materials provided with the
        !            12:  * distribution and in all advertising materials mentioning features or use
        !            13:  * of this software.  Neither the name of the University nor the names of
        !            14:  * its contributors may be used to endorse or promote products derived from
        !            15:  * this software without specific prior written permission.
        !            16:  * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            17:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            18:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            19:  *
        !            20:  *     @(#)sys_socket.c        7.8 (Berkeley) 6/28/90
        !            21:  */
        !            22: 
        !            23: #include "param.h"
        !            24: #include "systm.h"
        !            25: #include "user.h"
        !            26: #include "file.h"
        !            27: #include "mbuf.h"
        !            28: #include "protosw.h"
        !            29: #include "socket.h"
        !            30: #include "socketvar.h"
        !            31: #include "ioctl.h"
        !            32: #include "uio.h"
        !            33: #include "stat.h"
        !            34: 
        !            35: #include "../net/if.h"
        !            36: #include "../net/route.h"
        !            37: 
        !            38: int    soo_read(), soo_write(), soo_ioctl(), soo_select(), soo_close();
        !            39: struct fileops socketops =
        !            40:     { soo_read, soo_write, soo_ioctl, soo_select, soo_close };
        !            41: 
        !            42: /* ARGSUSED */
        !            43: soo_read(fp, uio, cred)
        !            44:        struct file *fp;
        !            45:        struct uio *uio;
        !            46:        struct ucred *cred;
        !            47: {
        !            48: 
        !            49:        return (soreceive((struct socket *)fp->f_data, (struct mbuf **)0,
        !            50:                uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0));
        !            51: }
        !            52: 
        !            53: /* ARGSUSED */
        !            54: soo_write(fp, uio, cred)
        !            55:        struct file *fp;
        !            56:        struct uio *uio;
        !            57:        struct ucred *cred;
        !            58: {
        !            59: 
        !            60:        return (sosend((struct socket *)fp->f_data, (struct mbuf *)0,
        !            61:                uio, (struct mbuf *)0, (struct mbuf *)0, 0));
        !            62: }
        !            63: 
        !            64: soo_ioctl(fp, cmd, data)
        !            65:        struct file *fp;
        !            66:        int cmd;
        !            67:        register caddr_t data;
        !            68: {
        !            69:        register struct socket *so = (struct socket *)fp->f_data;
        !            70: 
        !            71:        switch (cmd) {
        !            72: 
        !            73:        case FIONBIO:
        !            74:                if (*(int *)data)
        !            75:                        so->so_state |= SS_NBIO;
        !            76:                else
        !            77:                        so->so_state &= ~SS_NBIO;
        !            78:                return (0);
        !            79: 
        !            80:        case FIOASYNC:
        !            81:                if (*(int *)data) {
        !            82:                        so->so_state |= SS_ASYNC;
        !            83:                        so->so_rcv.sb_flags |= SB_ASYNC;
        !            84:                        so->so_snd.sb_flags |= SB_ASYNC;
        !            85:                } else {
        !            86:                        so->so_state &= ~SS_ASYNC;
        !            87:                        so->so_rcv.sb_flags &= ~SB_ASYNC;
        !            88:                        so->so_snd.sb_flags &= ~SB_ASYNC;
        !            89:                }
        !            90:                return (0);
        !            91: 
        !            92:        case FIONREAD:
        !            93:                *(int *)data = so->so_rcv.sb_cc;
        !            94:                return (0);
        !            95: 
        !            96:        case SIOCSPGRP:
        !            97:                so->so_pgid = *(int *)data;
        !            98:                return (0);
        !            99: 
        !           100:        case SIOCGPGRP:
        !           101:                *(int *)data = so->so_pgid;
        !           102:                return (0);
        !           103: 
        !           104:        case SIOCATMARK:
        !           105:                *(int *)data = (so->so_state&SS_RCVATMARK) != 0;
        !           106:                return (0);
        !           107:        }
        !           108:        /*
        !           109:         * Interface/routing/protocol specific ioctls:
        !           110:         * interface and routing ioctls should have a
        !           111:         * different entry since a socket's unnecessary
        !           112:         */
        !           113:        if (IOCGROUP(cmd) == 'i')
        !           114:                return (ifioctl(so, cmd, data));
        !           115:        if (IOCGROUP(cmd) == 'r')
        !           116:                return (rtioctl(cmd, data));
        !           117:        return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 
        !           118:            (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0));
        !           119: }
        !           120: 
        !           121: soo_select(fp, which)
        !           122:        struct file *fp;
        !           123:        int which;
        !           124: {
        !           125:        register struct socket *so = (struct socket *)fp->f_data;
        !           126:        register int s = splnet();
        !           127: 
        !           128:        switch (which) {
        !           129: 
        !           130:        case FREAD:
        !           131:                if (soreadable(so)) {
        !           132:                        splx(s);
        !           133:                        return (1);
        !           134:                }
        !           135:                sbselqueue(&so->so_rcv);
        !           136:                break;
        !           137: 
        !           138:        case FWRITE:
        !           139:                if (sowriteable(so)) {
        !           140:                        splx(s);
        !           141:                        return (1);
        !           142:                }
        !           143:                sbselqueue(&so->so_snd);
        !           144:                break;
        !           145: 
        !           146:        case 0:
        !           147:                if (so->so_oobmark ||
        !           148:                    (so->so_state & SS_RCVATMARK)) {
        !           149:                        splx(s);
        !           150:                        return (1);
        !           151:                }
        !           152:                sbselqueue(&so->so_rcv);
        !           153:                break;
        !           154:        }
        !           155:        splx(s);
        !           156:        return (0);
        !           157: }
        !           158: 
        !           159: /*ARGSUSED*/
        !           160: soo_stat(so, ub)
        !           161:        register struct socket *so;
        !           162:        register struct stat *ub;
        !           163: {
        !           164: 
        !           165:        bzero((caddr_t)ub, sizeof (*ub));
        !           166:        return ((*so->so_proto->pr_usrreq)(so, PRU_SENSE,
        !           167:            (struct mbuf *)ub, (struct mbuf *)0, 
        !           168:            (struct mbuf *)0));
        !           169: }
        !           170: 
        !           171: soo_close(fp)
        !           172:        struct file *fp;
        !           173: {
        !           174:        int error = 0;
        !           175: 
        !           176:        if (fp->f_data)
        !           177:                error = soclose((struct socket *)fp->f_data);
        !           178:        fp->f_data = 0;
        !           179:        return (error);
        !           180: }

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