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      1 /*-
      2  * Copyright (c) 2012 The NetBSD Foundation, Inc.
      3  * All rights reserved.
      4  *
      5  * This code is derived from software contributed to The NetBSD Foundation
      6  * by Paul Fleischer <paul (at) xpg.dk>
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     18  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     20  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     21  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     22  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     25  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     27  * POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 #include <sys/param.h>
     30 
     31 #include <netinet/in.h>
     32 #include <netinet/in_systm.h>
     33 
     34 #include <lib/libsa/stand.h>
     35 #include <lib/libsa/net.h>
     36 #include <lib/libsa/bootp.h>
     37 #include <lib/libsa/nfs.h>
     38 
     39 #include <lib/libkern/libkern.h>
     40 
     41 
     42 extern int netif_open(void*);
     43 extern int netif_init(unsigned int tag);
     44 
     45 extern struct in_addr servip;
     46 
     47 static int netdev_sock = -1;
     48 
     49 int
     50 net_open(struct open_file *f, ...)
     51 {
     52 	va_list ap;
     53 	char *path, *proto;
     54 	int error = 0;
     55 
     56 	if( netif_init(0) == 0 ) {
     57 		error = ENODEV;
     58 		goto out;
     59 	}
     60 
     61 	va_start(ap, f);
     62 	path = va_arg(ap, char *);
     63 	proto = va_arg(ap, char *);
     64 	va_end(ap);
     65 	if ((netdev_sock = netif_open(path)) < 0) {
     66 		error = errno;
     67 		goto out;
     68 	}
     69 
     70 	/* send DHCP request */
     71 	bootp(netdev_sock);
     72 
     73 	/* IP address was not found */
     74 	if (myip.s_addr == 0) {
     75 		error = ENOENT;
     76 		goto out;
     77 	}
     78 
     79 	if (path[0] != '\0') {
     80 		char *c;
     81 		char ip_addr[200];
     82 		/* Parse path specification as IP-ADDR:PATH and overwrite
     83 		   rootip and rootpath with those
     84 		 */
     85 
     86 		for(c=path; *c != '\0' && *c != ':'; c++);
     87 
     88 		if (*c == ':') {
     89 			char *filename;
     90 			strncpy(ip_addr, path, (c-path));
     91 			ip_addr[(c-path)] = '\0';
     92 			printf("IP addr: %s\n", ip_addr);
     93 			rootip.s_addr = inet_addr(ip_addr);
     94 
     95 			c++;
     96 			/* Finally, strip away file-component and copy it to
     97 			   bootfile */
     98 			for(filename = c+strlen(c); *filename != '/' && filename > c; filename--);
     99 			strncpy(rootpath, c, (filename-c));
    100 			rootpath[(filename-c)] = '\0';
    101 			printf("Root path: %s\n", rootpath);
    102 			strcpy(bootfile, ++filename);
    103 			printf("Bootfile: %s\n", bootfile);
    104 		} else {
    105 			/* No ':' found, assume it's just a filename */
    106 			strcpy(bootfile, path);
    107 		}
    108 	}
    109 
    110 	/* boot filename was not found */
    111 	if (bootfile[0] == '\0')
    112 		strcpy(bootfile, "netbsd");
    113 
    114 	if (strcmp(proto, "nfs") == 0
    115 	    && (nfs_mount(netdev_sock, rootip, rootpath) != 0)) {
    116 		error = errno;
    117 		goto out;
    118 	}
    119 
    120 	f->f_devdata = &netdev_sock;
    121 out:
    122 	return (error);
    123 }
    124 
    125 int
    126 net_close(struct open_file *f)
    127 
    128 {
    129 	return (0);
    130 }
    131 
    132 int
    133 net_strategy(void *d, int f, daddr_t b, size_t s, void *buf, size_t *r)
    134 {
    135 
    136 	return (EIO);
    137 }
    138