/* $NetBSD: netio.c,v 1.16.22.1 2020/05/01 11:53:08 martin Exp $ */ /*- * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe. * * 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 FOUNDATION OR CONTRIBUTORS * 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. */ /* * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include extern int nfs_root_node[]; /* XXX - get from nfs_mount() */ struct in_addr myip, rootip, gateip; n_long netmask; char rootpath[FNAME_SIZE]; static int netdev_sock = -1; static int open_count; int netio_ask = 0; /* default to bootparam, can override */ static char input_line[100]; int netmountroot(struct open_file *, 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. */ int netopen(struct open_file *f, ...) { va_list ap; char *devname; int error = 0; va_start(ap, f); devname = va_arg(ap, char *); va_end(ap); /* On first open, do netif open, mount, etc. */ if (open_count == 0) { /* Find network interface. */ if ((netdev_sock = netif_open(devname)) < 0) return ENXIO; if ((error = netmountroot(f, devname)) != 0) return error; } open_count++; f->f_devdata = nfs_root_node; return error; } int netclose(struct open_file *f) { /* On last close, do netif close, etc. */ if (open_count > 0) if (--open_count == 0) netif_close(netdev_sock); f->f_devdata = NULL; return 0; } int netstrategy(void *devdata, int func, daddr_t dblk, size_t size, void *v_buf, size_t *rsize) { *rsize = size; return EIO; } int netmountroot(struct open_file *f, char *devname) { struct iodesc *d; #ifdef DEBUG printf("netmountroot: %s\n", devname); #endif if (netio_ask) { get_my_ip: printf("My IP address? "); memset(input_line, 0, sizeof(input_line)); kgets(input_line, sizeof(input_line)); if ((myip.s_addr = inet_addr(input_line)) == htonl(INADDR_NONE)) { printf("invalid IP address: %s\n", input_line); goto get_my_ip; } get_my_netmask: printf("My netmask? "); memset(input_line, 0, sizeof(input_line)); kgets(input_line, sizeof(input_line)); if ((netmask = inet_addr(input_line)) == htonl(INADDR_NONE)) { printf("invalid netmask: %s\n", input_line); goto get_my_netmask; } get_my_gateway: printf("My gateway? "); memset(input_line, 0, sizeof(input_line)); kgets(input_line, sizeof(input_line)); if ((gateip.s_addr = inet_addr(input_line)) == htonl(INADDR_NONE)) { printf("invalid IP address: %s\n", input_line); goto get_my_gateway; } get_server_ip: printf("Server IP address? "); memset(input_line, 0, sizeof(input_line)); kgets(input_line, sizeof(input_line)); if ((rootip.s_addr = inet_addr(input_line)) == htonl(INADDR_NONE)) { printf("invalid IP address: %s\n", input_line); goto get_server_ip; } get_server_path: printf("Server path? "); memset(rootpath, 0, sizeof(rootpath)); kgets(rootpath, sizeof(rootpath)); if (rootpath[0] == '\0' || rootpath[0] == '\n') goto get_server_path; if ((d = socktodesc(netdev_sock)) == NULL) return EMFILE; d->myip = myip; goto do_nfs_mount; } /* * 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 boot info using RARP and Sun bootparams. */ /* Get our IP address. (rarp.c) */ if (rarp_getipaddress(netdev_sock) == -1) return errno; printf("boot: client IP address: %s\n", inet_ntoa(myip)); /* Get our hostname, server IP address. */ if (bp_whoami(netdev_sock)) return errno; printf("boot: client name: %s\n", hostname); /* Get the root pathname. */ if (bp_getfile(netdev_sock, "root", &rootip, rootpath)) return errno; #else /* Get boot info using BOOTP way. (RFC951, RFC1048) */ bootp(netdev_sock); printf("boot: client IP address: %s \n", inet_ntoa(myip)); #endif /* SUN_BOOTPARAMS */ printf("root addr=%s path=%s\n", inet_ntoa(rootip), rootpath); do_nfs_mount: /* Get the NFS file handle (mount). */ if (nfs_mount(netdev_sock, rootip, rootpath)) return errno; return 0; }