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Annotation of XNU/bsd/netat/at_pcb.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: 
        !            23: /*
        !            24:  *     Copyright (c) 1997-1999 Apple Computer, Inc.
        !            25:  *     All Rights Reserved.
        !            26:  */
        !            27: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
        !            28: /*
        !            29:  * Copyright (c) 1982, 1986, 1991, 1993
        !            30:  *     The Regents of the University of California.  All rights reserved.
        !            31:  *
        !            32:  * Redistribution and use in source and binary forms, with or without
        !            33:  * modification, are permitted provided that the following conditions
        !            34:  * are met:
        !            35:  * 1. Redistributions of source code must retain the above copyright
        !            36:  *    notice, this list of conditions and the following disclaimer.
        !            37:  * 2. Redistributions in binary form must reproduce the above copyright
        !            38:  *    notice, this list of conditions and the following disclaimer in the
        !            39:  *    documentation and/or other materials provided with the distribution.
        !            40:  * 3. All advertising materials mentioning features or use of this software
        !            41:  *    must display the following acknowledgement:
        !            42:  *      This product includes software developed by the University of
        !            43:  *      California, Berkeley and its contributors.
        !            44:  * 4. Neither the name of the University nor the names of its contributors
        !            45:  *    may be used to endorse or promote products derived from this software
        !            46:  *    without specific prior written permission.
        !            47:  *
        !            48:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            49:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            50:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            51:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            52:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            53:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            54:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            55:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            56:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            57:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            58:  * SUCH DAMAGE.
        !            59:  *
        !            60:  *     @(#)at_pcb.c    8.2 (Berkeley) 1/4/94
        !            61:  */
        !            62: 
        !            63: #include <sys/param.h>
        !            64: #include <sys/systm.h>
        !            65: #include <sys/malloc.h>
        !            66: #include <sys/mbuf.h>
        !            67: #include <sys/protosw.h>
        !            68: #include <sys/socket.h>
        !            69: #include <sys/socketvar.h>
        !            70: #include <sys/ioctl.h>
        !            71: #include <sys/errno.h>
        !            72: #include <sys/time.h>
        !            73: #include <sys/proc.h>
        !            74: #include <kern/kern_types.h>
        !            75: #include <kern/zalloc.h>
        !            76: #include <kern/queue.h>
        !            77: 
        !            78: #include <net/if.h>
        !            79: 
        !            80: #include <netat/sysglue.h>
        !            81: #include <netat/appletalk.h>
        !            82: #include <netat/ddp.h>
        !            83: #include <netat/at_pcb.h>
        !            84: #include <netat/debug.h>
        !            85: #include <netat/at_var.h>
        !            86: #include <netat/adsp.h>
        !            87: #include <netat/adsp_internal.h>
        !            88: 
        !            89: extern struct atpcb ddp_head;
        !            90: extern struct atpcb *atp_inputQ[];
        !            91: extern CCB *adsp_inputQ[];
        !            92: extern int xpatcnt;
        !            93: extern struct {
        !            94:   void (*func)();
        !            95:   } ddp_handler[];
        !            96: 
        !            97: 
        !            98: zone_t atpcb_zone;
        !            99: 
        !           100: void at_memzone_init()
        !           101: {
        !           102:        vm_size_t str_size;
        !           103: 
        !           104:        str_size = (vm_size_t)sizeof(struct atpcb);
        !           105:        atpcb_zone = (zone_t)zinit(str_size, 1000*str_size, 8192, "atpcb zone");
        !           106: }
        !           107: 
        !           108: int at_pcballoc(so, head)
        !           109:        struct socket *so;
        !           110:        struct atpcb *head;
        !           111: {
        !           112:        register struct atpcb *pcb;
        !           113: 
        !           114:        pcb = (struct atpcb *)zalloc(atpcb_zone);
        !           115:        if (pcb == NULL)
        !           116:                return (ENOBUFS);
        !           117:        bzero((caddr_t)pcb, sizeof(*pcb));
        !           118: 
        !           119:        pcb->atpcb_head = head;
        !           120:        pcb->atpcb_socket = so;
        !           121:        if (head)
        !           122:            insque((queue_t)pcb, (queue_t)head);
        !           123:        so->so_pcb = (caddr_t)pcb;
        !           124: 
        !           125:        return (0);
        !           126: }
        !           127: 
        !           128: int at_pcbdetach(pcb)
        !           129:        struct atpcb *pcb;
        !           130: {
        !           131:        struct socket *so = pcb->atpcb_socket;
        !           132: 
        !           133:        /* Notify NBP that we are closing this DDP socket */
        !           134:        if (pcb->lport) {
        !           135:                ddp_notify_nbp(pcb->lport, pcb->pid, pcb->ddptype);
        !           136:                pcb->lport = 0;
        !           137:        }
        !           138: 
        !           139:        so->so_pcb = 0;
        !           140:        if ((pcb->atpcb_next) && (pcb->atpcb_prev))
        !           141:            remque((queue_t)pcb);
        !           142:        zfree(atpcb_zone, (vm_offset_t)pcb);
        !           143:        sofree(so);
        !           144:        return(0);
        !           145: }
        !           146: 
        !           147: int ddp_socket_inuse(ddpsock, proto)
        !           148:           u_char ddpsock, proto;
        !           149: {
        !           150:           struct atpcb *pcb;
        !           151: 
        !           152:          if ((proto == DDP_ATP) && atp_inputQ[ddpsock])
        !           153:                return TRUE;
        !           154:           if ((proto == DDP_ADSP) && adsp_inputQ[ddpsock])
        !           155:                 return TRUE;
        !           156:           if (ddp_handler[ddpsock].func)
        !           157:                 return TRUE;
        !           158:           for (pcb = ddp_head.atpcb_next; pcb != &ddp_head;
        !           159:               pcb = pcb->atpcb_next) {
        !           160:                if (pcb->lport == ddpsock &&
        !           161:                    pcb->ddptype == proto)
        !           162:                        return TRUE;
        !           163:          }
        !           164:          return FALSE;
        !           165: }
        !           166: 
        !           167: int at_pcbbind(pcb, nam)
        !           168:        register struct atpcb *pcb;
        !           169:        struct sockaddr *nam;
        !           170: {
        !           171:        register struct socket *so = pcb->atpcb_socket;
        !           172:        register struct sockaddr_at *local = (struct sockaddr_at *) nam;
        !           173:        u_char ddpsock = local->sat_port;
        !           174: 
        !           175:        if ((xpatcnt == 0) ||
        !           176:            (local->sat_family != AF_APPLETALK))
        !           177:                return(EADDRNOTAVAIL);
        !           178: 
        !           179:        /* Request for dynamic socket? */
        !           180:        if (ddpsock == 0) {
        !           181:                /* Search table for free one */
        !           182:                /* *** borrow IP algorithm, instead? *** */
        !           183:                for (ddpsock = DDP_SOCKET_LAST; 
        !           184:                     ddpsock >= (DDP_SOCKET_1st_DYNAMIC + 1); 
        !           185:                                                /* sip has 1st */
        !           186:                     ddpsock--) {
        !           187:                        if (! ddp_socket_inuse(ddpsock, pcb->ddptype))
        !           188:                                break;
        !           189:                }
        !           190:                if (ddpsock < (DDP_SOCKET_1st_DYNAMIC + 1))
        !           191:                        return(EADDRNOTAVAIL);  /* Error if no free sockets */
        !           192:        } else {
        !           193:                /* Asking to open a socket by its number.  
        !           194:                   Check if its legal & free. */
        !           195:                if (ddpsock > DDP_SOCKET_LAST)
        !           196:                        return(EINVAL);
        !           197:                if (ddp_socket_inuse(ddpsock, pcb->ddptype))
        !           198:                        return(EADDRNOTAVAIL);
        !           199:        }
        !           200: 
        !           201:        pcb->lport = ddpsock;
        !           202:        /* if address is specified, make sure address matches one of the 
        !           203:           interfaces configured for AppleTalk */
        !           204:        if (MULTIHOME_MODE && 
        !           205:            (local->sat_addr.s_net || local->sat_addr.s_node)) {
        !           206:                at_ifaddr_t *ifID;
        !           207:                TAILQ_FOREACH(ifID, &at_ifQueueHd, aa_link) {
        !           208:                        if (ifID->ifThisNode.s_net == local->sat_addr.s_net &&
        !           209:                            ifID->ifThisNode.s_node == local->sat_addr.s_node) {
        !           210:                                pcb->laddr = local->sat_addr;
        !           211:                                return(0);
        !           212:                        }
        !           213:                }
        !           214:                return(EINVAL);
        !           215:        }
        !           216:        return(0);
        !           217: }
        !           218: 
        !           219: void at_setsockaddr(pcb, nam)
        !           220:        register struct atpcb *pcb;
        !           221:        struct sockaddr *nam;
        !           222: {
        !           223:        register struct sockaddr_at *sat;
        !           224:        
        !           225:        sat = (struct sockaddr_at *) nam;
        !           226:        bzero((caddr_t)sat, sizeof (*sat));
        !           227:        sat->sat_family = AF_APPLETALK;
        !           228:        sat->sat_len = sizeof(*sat);
        !           229:        sat->sat_port = pcb->lport;
        !           230:        sat->sat_addr = pcb->laddr;
        !           231: }
        !           232: 
        !           233: void at_setpeeraddr(pcb, nam)
        !           234:        struct atpcb *pcb;
        !           235:        struct sockaddr *nam;
        !           236: {
        !           237:        register struct sockaddr_at *sat;
        !           238:        
        !           239:        sat = (struct sockaddr_at *) nam;
        !           240:        bzero((caddr_t)sat, sizeof (*sat));
        !           241:        sat->sat_family = AF_APPLETALK;
        !           242:        sat->sat_len = sizeof(*sat);
        !           243:        sat->sat_port = pcb->rport;
        !           244:        sat->sat_addr = pcb->raddr;
        !           245: }

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