/* $NetBSD: net.c,v 1.10 2021/04/12 03:55:41 mrg Exp $ */ /* * Copyright (C) 1995 Wolfgang Solfrank. * Copyright (C) 1995 TooLs GmbH. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by TooLs GmbH. * 4. The name of TooLs GmbH may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * This module implements a "raw device" interface suitable for * use by the stand-alone I/O library NFS code. This interface * does not support any "block" access, and exists only for the * purpose of initializing the network interface, getting boot * parameters, and performing the NFS mount. * * At open time, this does: * * find interface - netif_open() * BOOTP - bootp() * RPC/mountd - nfs_mount() * * The root file handle from mountd is saved in a global * for use by the NFS open code (NFS/lookup). * * Note: this is based in part on sys/arch/sparc/stand/net.c */ #include <sys/param.h> #include <sys/socket.h> #include <net/if.h> #include <netinet/in.h> #include <netinet/in_systm.h> #include <lib/libsa/stand.h> #include <lib/libsa/net.h> #include <lib/libsa/netif.h> #include <lib/libsa/bootp.h> #include <lib/libsa/bootparam.h> #include <lib/libsa/nfs.h> #include <lib/libkern/libkern.h> #include "ofdev.h" #include "net.h" static int net_mountroot_bootparams(void); static int net_mountroot_bootp(void); static int netdev_sock = -1; static int open_count; /* * Called by devopen after it sets f->f_dev to our devsw entry. * This opens the low-level device and sets f->f_devdata. */ int net_open(struct of_dev *op) { int error = 0; /* * On first open, do netif open, mount, etc. */ if (open_count == 0) { /* Find network interface. */ if ((netdev_sock = netif_open(op)) < 0) { error = errno; goto bad; } } open_count++; bad: if (netdev_sock >= 0 && open_count == 0) { netif_close(netdev_sock); netdev_sock = -1; } return error; } int net_close(struct of_dev *op) { /* * On last close, do netif close, etc. */ if (open_count > 0) if (--open_count == 0) { netif_close(netdev_sock); netdev_sock = -1; } return 0; } static void net_clear_params(void) { myip.s_addr = 0; netmask = 0; gateip.s_addr = 0; *hostname = '\0'; rootip.s_addr = 0; *rootpath = '\0'; } int net_mountroot_bootparams(void) { net_clear_params(); /* Get our IP address. (rarp.c) */ if (rarp_getipaddress(netdev_sock) == -1) return (errno); printf("Using BOOTPARAMS protocol:\n ip addr=%s\n", inet_ntoa(myip)); if (bp_whoami(netdev_sock)) return (errno); printf(" hostname=%s\n", hostname); if (bp_getfile(netdev_sock, "root", &rootip, rootpath)) return (errno); return (0); } int net_mountroot_bootp(void) { int attempts; /* We need a few attempts here as some DHCP servers * require >1 packet and my wireless bridge is always * in learning mode until the 2nd attempt ... */ for (attempts = 0; attempts < 3; attempts++) { net_clear_params(); bootp(netdev_sock); if (myip.s_addr != 0) break; } if (myip.s_addr == 0) return(ENOENT); printf("Using BOOTP protocol:\n ip addr=%s\n", inet_ntoa(myip)); if (hostname[0]) printf(" hostname=%s\n", hostname); if (netmask) printf(" netmask=%s\n", intoa(netmask)); if (gateip.s_addr) printf(" gateway=%s\n", inet_ntoa(gateip)); return (0); } /* * libsa's tftp_open expects a pointer to netdev_sock, i.e. an (int *), * in f_devdata, a pointer to which gets handed down from devopen(). * * Do not expect booting via different methods to have the same * requirements or semantics. * * net_tftp_bootp uses net_mountroot_bootp because that incidentially does * most of what it needs to do. It of course in no manner actually mounts * anything, all that routine actually does is prepare the socket for the * necessary net access, and print info for the user. */ int net_tftp_bootp(int **sock) { net_mountroot_bootp(); if (myip.s_addr == 0) return(ENOENT); *sock = &netdev_sock; return (0); } int net_mountroot(void) { int error; #ifdef DEBUG printf("net_mountroot\n"); #endif /* * Get info for NFS boot: our IP address, our hostname, * server IP address, and our root path on the server. * There are two ways to do this: The old, Sun way, * and the more modern, BOOTP way. (RFC951, RFC1048) */ /* Try BOOTP first */ error = net_mountroot_bootp(); /* Historically, we've used BOOTPARAMS, so try that next */ if (error != 0) error = net_mountroot_bootparams(); if (error != 0) return (error); printf(" root addr=%s\n path=%s\n", inet_ntoa(rootip), rootpath); /* Get the NFS file handle (mount). */ if (nfs_mount(netdev_sock, rootip, rootpath) != 0) return (errno); return (0); }
