1 /* $NetBSD: dev_net.c,v 1.3 2014/08/05 17:55:20 joerg Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Tohru Nishimura. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/param.h> 33 34 #include <netinet/in.h> 35 #include <netinet/in_systm.h> 36 37 #include <lib/libsa/stand.h> 38 #include <lib/libsa/net.h> 39 #include <lib/libsa/bootp.h> 40 #include <lib/libsa/nfs.h> 41 #include <lib/libkern/libkern.h> 42 43 #include <machine/bootinfo.h> 44 45 #include "globals.h" 46 47 static int netdev_sock = -1; 48 static int netdev_opens; 49 50 int 51 net_open(struct open_file *f, ...) 52 53 { 54 va_list ap; 55 char *file, *proto; 56 int error; 57 extern struct btinfo_bootpath bi_path; 58 59 va_start(ap, f); 60 file = va_arg(ap, char *); 61 proto = va_arg(ap, char *); 62 va_end(ap); 63 64 if (netdev_opens > 0) 65 return 0; 66 67 if ((netdev_sock = netif_open(NULL)) < 0) 68 return ENXIO; /* never fails indeed */ 69 70 error = 0; 71 bootp(netdev_sock); /* send DHCP request */ 72 if (myip.s_addr == 0) { 73 error = ENOENT; /* IP address was not found */ 74 goto bad; 75 } 76 77 if (file[0] != '\0') 78 snprintf(bootfile, sizeof(bootfile), "%s", file); 79 else if (bootfile[0] == '\0') 80 snprintf(bootfile, sizeof(bootfile), "netbsd"); 81 82 if (strcmp(proto, "nfs") == 0 83 && (error = nfs_mount(netdev_sock, rootip, rootpath)) != 0) 84 goto bad; 85 86 snprintf(bi_path.bootpath, sizeof(bi_path.bootpath), "%s", bootfile); 87 f->f_devdata = &netdev_sock; 88 netdev_opens++; 89 return 0; 90 bad: 91 netif_close(netdev_sock); 92 netdev_sock = -1; 93 return error; 94 } 95 96 int 97 net_close(struct open_file *f) 98 99 { 100 f->f_devdata = NULL; 101 if (--netdev_opens > 0) 102 return 0; 103 netif_close(netdev_sock); 104 netdev_sock = -1; 105 return 0; 106 } 107 108 int 109 net_strategy(void *devdata, int rw, daddr_t dblk, size_t size, 110 void *p, size_t *rsize) 111 { 112 113 return EIO; 114 } 115