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Annotation of sys/arch/macppc/stand/net.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: net.c,v 1.4 2003/10/16 04:30:09 drahn Exp $   */
                      2: /*     $NetBSD: net.c,v 1.1 1997/04/16 20:29:18 thorpej Exp $  */
                      3:
                      4: /*
                      5:  * Copyright (C) 1995 Wolfgang Solfrank.
                      6:  * Copyright (C) 1995 TooLs GmbH.
                      7:  * All rights reserved.
                      8:  *
                      9:  * Redistribution and use in source and binary forms, with or without
                     10:  * modification, are permitted provided that the following conditions
                     11:  * are met:
                     12:  * 1. Redistributions of source code must retain the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer.
                     14:  * 2. Redistributions in binary form must reproduce the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer in the
                     16:  *    documentation and/or other materials provided with the distribution.
                     17:  * 3. All advertising materials mentioning features or use of this software
                     18:  *    must display the following acknowledgement:
                     19:  *     This product includes software developed by TooLs GmbH.
                     20:  * 4. The name of TooLs GmbH may not be used to endorse or promote products
                     21:  *    derived from this software without specific prior written permission.
                     22:  *
                     23:  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
                     24:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
                     25:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
                     26:  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
                     27:  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
                     28:  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
                     29:  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
                     30:  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
                     31:  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
                     32:  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
                     33:  */
                     34:
                     35: /*
                     36:  * This module implements a "raw device" interface suitable for
                     37:  * use by the stand-alone I/O library NFS code.  This interface
                     38:  * does not support any "block" access, and exists only for the
                     39:  * purpose of initializing the network interface, getting boot
                     40:  * parameters, and performing the NFS mount.
                     41:  *
                     42:  * At open time, this does:
                     43:  *
                     44:  * find interface      - netif_open()
                     45:  * BOOTP               - bootp()
                     46:  * RPC/mountd          - nfs_mount()
                     47:  *
                     48:  * The root file handle from mountd is saved in a global
                     49:  * for use by the NFS open code (NFS/lookup).
                     50:  *
                     51:  * Note: this is based in part on sys/arch/sparc/stand/net.c
                     52:  */
                     53:
                     54: #include <sys/param.h>
                     55: #include <sys/socket.h>
                     56: #include <net/if.h>
                     57: #include <netinet/in.h>
                     58: #include <netinet/if_ether.h>
                     59: #include <netinet/in_systm.h>
                     60:
                     61: #include <lib/libsa/stand.h>
                     62: #include <lib/libsa/net.h>
                     63: #include <lib/libsa/netif.h>
                     64:
                     65: char   rootpath[FNAME_SIZE];
                     66:
                     67: static int netdev_sock = -1;
                     68: static int open_count;
                     69:
                     70: /*
                     71:  * Called by devopen after it sets f->f_dev to our devsw entry.
                     72:  * This opens the low-level device and sets f->f_devdata.
                     73:  */
                     74: int
                     75: net_open(struct of_dev *op)
                     76: {
                     77:        int error = 0;
                     78:
                     79:        /*
                     80:         * On first open, do netif open, mount, etc.
                     81:         */
                     82:        if (open_count == 0) {
                     83:                /* Find network interface. */
                     84:                if ((netdev_sock = netif_open(op)) < 0) {
                     85:                        error = errno;
                     86:                        goto bad;
                     87:                }
                     88:                if ((error = net_mountroot()) != 0)
                     89:                        goto bad;
                     90:        }
                     91:        open_count++;
                     92: bad:
                     93:        if (netdev_sock >= 0 && open_count == 0) {
                     94:                netif_close(netdev_sock);
                     95:                netdev_sock = -1;
                     96:        }
                     97:        return error;
                     98: }
                     99:
                    100: int
                    101: net_close(struct of_dev *op)
                    102: {
                    103:        /*
                    104:         * On last close, do netif close, etc.
                    105:         */
                    106:        if (open_count > 0)
                    107:                if (--open_count == 0) {
                    108:                        netif_close(netdev_sock);
                    109:                        netdev_sock = -1;
                    110:                }
                    111: }
                    112:
                    113: int
                    114: net_mountroot()
                    115: {
                    116:
                    117: #ifdef DEBUG
                    118:        printf("net_mountroot\n");
                    119: #endif
                    120:
                    121:        /*
                    122:         * Get info for NFS boot: our IP address, out hostname,
                    123:         * server IP address, and our root path on the server.
                    124:         * We use BOOTP (RFC951, RFC1532) exclusively as mandated
                    125:         * by PowerPC Reference Platform Specification I.4.2
                    126:         */
                    127:
                    128:        bootp(netdev_sock);
                    129:
                    130:        if (myip.s_addr == 0)
                    131:                return ETIMEDOUT;
                    132:
                    133:        printf("Using IP address: %s\n", inet_ntoa(myip));
                    134:
                    135: #ifdef DEBUG
                    136:        printf("myip: %s (%s)", hostname, inet_ntoa(myip));
                    137:        if (gateip.s_addr)
                    138:                printf(", gateip: %s", inet_ntoa(gateip));
                    139:        if (netmask)
                    140:                printf(", netmask: %s", intoa(netmask));
                    141:        printf("\n");
                    142: #endif
                    143:        printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath);
                    144:
                    145:        /*
                    146:         * Get the NFS file handle (mount).
                    147:         */
                    148:        if (nfs_mount(netdev_sock, rootip, rootpath) < 0)
                    149:                return errno;
                    150:        return 0;
                    151: }