/* $OpenBSD: dev_net.c,v 1.7 2023/01/16 07:29:35 deraadt Exp $ */ /* $NetBSD: dev_net.c,v 1.4 1997/04/06 08:41:24 cgd Exp $ */ /* * Copyright (c) 1995 Gordon W. Ross * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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() * RARP for IP address - rarp_getipaddress() * RPC/bootparams - callrpc(d, RPC_BOOTPARAMS, ...) * RPC/mountd - nfs_mount(sock, ip, path) * * the root file handle from mountd is saved in a global * for use by the NFS open code (NFS/lookup). */ #include <stdarg.h> #include <sys/param.h> #include <sys/socket.h> #include <net/if.h> #include <netinet/in.h> #include <netinet/if_ether.h> #include <lib/libsa/stand.h> #include <lib/libsa/net.h> #include <lib/libsa/netif.h> #include <lib/libsa/bootparam.h> #include "dev_net.h" extern int debug; extern int nfs_root_node[]; /* XXX - get from nfs_mount() */ /* * Various globals needed by the network code: */ #if 0 /* for arp.c, rarp.c */ u_char bcea[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; #endif /* * Local things... */ static int netdev_sock = -1; static int netdev_opens; int net_getparams(int); int nfs_mount(int, struct in_addr, char *); /* * Called by devopen after it sets f->f_dev to our devsw entry. * This opens the low-level device and sets f->f_devdata. * This is declared with variable arguments... */ int net_open(struct open_file *f, ...) { va_list ap; char *devname; /* Device part of file name (or NULL). */ int error = 0; va_start(ap, f); devname = va_arg(ap, char *); va_end(ap); #ifdef NETIF_DEBUG if (debug) printf("net_open: %s\n", devname); #endif /* On first open, do netif open, mount, etc. */ if (netdev_opens == 0) { /* Find network interface. */ if (netdev_sock < 0) { netdev_sock = netif_open(devname); if (netdev_sock < 0) { printf("net_open: netif_open() failed\n"); return (ENXIO); } if (debug) printf("net_open: netif_open() succeeded\n"); } if (rootip.s_addr == 0) { /* Get root IP address, and path, etc. */ error = net_getparams(netdev_sock); if (error) { /* getparams makes its own noise */ goto fail; } /* Get the NFS file handle (mountd). */ error = nfs_mount(netdev_sock, rootip, rootpath); if (error) { printf("net_open: NFS mount error=%d\n", error); rootip.s_addr = 0; fail: netif_close(netdev_sock); netdev_sock = -1; return (error); } if (debug) printf("net_open: NFS mount succeeded\n"); } } netdev_opens++; f->f_devdata = nfs_root_node; return (error); } int net_close(f) struct open_file *f; { #ifdef NETIF_DEBUG if (debug) printf("net_close: opens=%d\n", netdev_opens); #endif /* On last close, do netif close, etc. */ f->f_devdata = NULL; /* Extra close call? */ if (netdev_opens <= 0) return (0); netdev_opens--; /* Not last close? */ if (netdev_opens > 0) return(0); rootip.s_addr = 0; if (netdev_sock >= 0) { if (debug) printf("net_close: calling netif_close()\n"); netif_close(netdev_sock); netdev_sock = -1; } return (0); } int net_ioctl() { return EIO; } int net_strategy() { return EIO; } int net_getparams(sock) int sock; { /* * 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) */ #ifdef SUN_BOOTPARAMS /* Get our IP address. (rarp.c) */ if (rarp_getipaddress(sock)) { printf("net_open: RARP failed\n"); return (EIO); } #else /* BOOTPARAMS */ /* * Get boot info using BOOTP. (RFC951, RFC1048) * This also gets the server IP address, gateway, * root path, etc. */ bootp(sock); if (myip.s_addr == 0) { printf("net_open: BOOTP failed\n"); return (EIO); } #endif /* BOOTPARAMS */ printf("boot: client addr: %s\n", inet_ntoa(myip)); #ifdef SUN_BOOTPARAMS /* Get our hostname, server IP address, gateway. */ if (bp_whoami(sock)) { printf("net_open: bootparam/whoami RPC failed\n"); return (EIO); } #endif /* BOOTPARAMS */ printf("boot: client name: %s\n", hostname); if (gateip.s_addr) { printf("boot: subnet mask: %s\n", intoa(netmask)); printf("boot: net gateway: %s\n", inet_ntoa(gateip)); } #ifdef SUN_BOOTPARAMS /* Get the root pathname. */ if (bp_getfile(sock, "root", &rootip, rootpath)) { printf("net_open: bootparam/getfile RPC failed\n"); return (EIO); } #endif /* BOOTPARAMS */ printf("boot: server addr: %s\n", inet_ntoa(rootip)); printf("boot: server path: %s\n", rootpath); return (0); }
