Annotation of sys/arch/i386/stand/libsa/pxe_net.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: pxe_net.c,v 1.2 2004/04/07 18:00:55 tom Exp $ */
! 2: /* $NetBSD: dev_net.c,v 1.4 2003/03/12 13:15:08 drochner Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1997 The NetBSD Foundation, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to The NetBSD Foundation
! 9: * by Gordon W. Ross.
! 10: *
! 11: * Redistribution and use in source and binary forms, with or without
! 12: * modification, are permitted provided that the following conditions
! 13: * are met:
! 14: * 1. Redistributions of source code must retain the above copyright
! 15: * notice, this list of conditions and the following disclaimer.
! 16: * 2. Redistributions in binary form must reproduce the above copyright
! 17: * notice, this list of conditions and the following disclaimer in the
! 18: * documentation and/or other materials provided with the distribution.
! 19: * 3. All advertising materials mentioning features or use of this software
! 20: * must display the following acknowledgement:
! 21: * This product includes software developed by the NetBSD
! 22: * Foundation, Inc. and its contributors.
! 23: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 24: * contributors may be used to endorse or promote products derived
! 25: * from this software without specific prior written permission.
! 26: *
! 27: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 28: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 29: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 30: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 31: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 32: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 33: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 34: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 35: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 36: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 37: * POSSIBILITY OF SUCH DAMAGE.
! 38: */
! 39:
! 40: /*
! 41: * This module implements a "raw device" interface suitable for
! 42: * use by the stand-alone I/O library NFS and TFTP code. This interface
! 43: * does not support any "block" access, and exists only for the
! 44: * purpose of initializing the network interface and getting boot
! 45: * parameters.
! 46: *
! 47: * At open time, this does:
! 48: *
! 49: * find interface - netif_open()
! 50: * BOOTP for IP address - bootp()
! 51: */
! 52:
! 53: #include <sys/param.h>
! 54: #include <sys/socket.h>
! 55: #include <net/if.h>
! 56: #include <netinet/in.h>
! 57: #include <netinet/in_systm.h>
! 58:
! 59: #include <lib/libkern/libkern.h>
! 60:
! 61: #include <lib/libsa/stand.h>
! 62: #include <lib/libsa/net.h>
! 63: #include "pxe_netif.h"
! 64: #include "pxe_net.h"
! 65:
! 66: static int netdev_sock = -1;
! 67: static int netdev_opens;
! 68:
! 69: int net_getparams(int);
! 70:
! 71: /*
! 72: * Called by devopen after it sets f->f_dev to our devsw entry.
! 73: * This opens the low-level device and sets f->f_devdata.
! 74: * This is declared with variable arguments...
! 75: */
! 76: int
! 77: net_open(struct open_file *f, ...)
! 78: {
! 79: int error = 0;
! 80:
! 81: #ifdef NETIF_DEBUG
! 82: if (debug)
! 83: printf("net_open()\n");
! 84: #endif
! 85:
! 86: /* On first open, do netif open, mount, etc. */
! 87: if (netdev_opens == 0) {
! 88: /* Find network interface. */
! 89: if (netdev_sock < 0) {
! 90: netdev_sock = pxe_netif_open();
! 91: if (netdev_sock < 0) {
! 92: printf("net_open: netif_open() failed\n");
! 93: return ENXIO;
! 94: }
! 95: #ifdef NETIF_DEBUG
! 96: if (debug)
! 97: printf("net_open: netif_open() succeeded\n");
! 98: #endif
! 99: }
! 100: #ifdef notyet
! 101: if (rootip.s_addr == 0) {
! 102: /* Get root IP address, and path, etc. */
! 103: error = net_getparams(netdev_sock);
! 104: if (error) {
! 105: /* getparams makes its own noise */
! 106: pxe_netif_close(netdev_sock);
! 107: netdev_sock = -1;
! 108: return error;
! 109: }
! 110: }
! 111: #endif
! 112: }
! 113: netdev_opens++;
! 114: f->f_devdata = &netdev_sock;
! 115: return error;
! 116: }
! 117:
! 118: int
! 119: net_close(struct open_file *f)
! 120: {
! 121: #ifdef NETIF_DEBUG
! 122: if (debug)
! 123: printf("net_close: opens=%d\n", netdev_opens);
! 124: #endif
! 125:
! 126: /* On last close, do netif close, etc. */
! 127: f->f_devdata = NULL;
! 128: /* Extra close call? */
! 129: if (netdev_opens <= 0)
! 130: return 0;
! 131: netdev_opens--;
! 132: /* Not last close? */
! 133: if (netdev_opens > 0)
! 134: return 0;
! 135: rootip.s_addr = 0;
! 136: if (netdev_sock >= 0) {
! 137: #ifdef NETIF_DEBUG
! 138: if (debug)
! 139: printf("net_close: calling netif_close()\n");
! 140: #endif
! 141: pxe_netif_close(netdev_sock);
! 142: netdev_sock = -1;
! 143: }
! 144: return 0;
! 145: }
! 146:
! 147: int
! 148: net_ioctl(struct open_file *f, u_long cmd, void *data)
! 149: {
! 150: return EIO;
! 151: }
! 152:
! 153: int
! 154: net_strategy(void *devdata, int rw, daddr_t blk, size_t size, void *buf,
! 155: size_t *rsize)
! 156: {
! 157: return EIO;
! 158: }
! 159:
! 160:
! 161: /*
! 162: * Get info for network boot: our IP address, our hostname,
! 163: * server IP address, and our root path on the server.
! 164: */
! 165: extern int bootp(int);
! 166:
! 167: int
! 168: net_getparams(int sock)
! 169: {
! 170: /*
! 171: * Try to get boot info using BOOTP. If we succeed, then
! 172: * the server IP address, gateway, and root path will all
! 173: * be initialized. If any remain uninitialized, we will
! 174: * use RARP and RPC/bootparam (the Sun way) to get them.
! 175: */
! 176: bootp(sock);
! 177: if (myip.s_addr != 0)
! 178: return 0;
! 179: if (debug)
! 180: printf("net_getparams: BOOTP failed\n");
! 181:
! 182: return EIO;
! 183: }
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