1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* 27 * This file contains a routine used to validate a ifconfig-style interface 28 * specification 29 */ 30 31 #include <stdlib.h> 32 #include <ctype.h> 33 #include <alloca.h> 34 #include <errno.h> 35 #include <string.h> 36 #include <libinetutil.h> 37 38 /* 39 * Given a token with a logical unit spec, return the logical unit converted 40 * to a uint_t. 41 * 42 * Returns: 0 for success, nonzero if an error occurred. errno is set if 43 * necessary. 44 */ 45 static int 46 getlun(const char *bp, int bpsize, uint_t *lun) 47 { 48 char *ep = (char *)&bp[bpsize - 1]; 49 char *sp = strchr(bp, ':'), *tp; 50 51 /* A logical unit spec looks like: <token>:<unsigned int>\0 */ 52 if (isdigit(*bp) || !isdigit(*ep) || sp == NULL || 53 strchr(sp + 1, ':') != NULL) { 54 errno = EINVAL; 55 return (-1); 56 } 57 58 *sp++ = '\0'; 59 60 /* Lun must be all digits */ 61 for (tp = sp; tp < ep && isdigit(*tp); tp++) 62 /* Null body */; 63 if (tp != ep) { 64 errno = EINVAL; 65 return (-1); 66 } 67 68 *lun = atoi(sp); 69 return (0); 70 } 71 72 /* 73 * Given a single token ending with a ppa spec, return the ppa spec converted 74 * to a uint_t. 75 * 76 * Returns: 0 for success, nonzero if an error occurred. errno is set if 77 * necessary. 78 */ 79 static int 80 getppa(const char *bp, int bpsize, uint_t *ppa) 81 { 82 char *ep = (char *)&bp[bpsize - 1]; 83 char *tp; 84 85 if (!isdigit(*ep)) { 86 errno = EINVAL; 87 return (-1); 88 } 89 90 for (tp = ep; tp >= bp && isdigit(*tp); tp--) 91 /* Null body */; 92 93 if (*tp == ':') { 94 errno = EINVAL; 95 return (-1); 96 } 97 98 *ppa = atoi(tp + 1); 99 return (0); 100 } 101 102 /* 103 * Given an ifconfig-style inet relative-path interface specification 104 * (e.g: bge0:2), validate its form and decompose the contents into a 105 * dynamically allocated ifspec_t. 106 * 107 * Returns ifspec_t for success, NULL pointer if spec is malformed. 108 */ 109 boolean_t 110 ifparse_ifspec(const char *ifname, ifspec_t *ifsp) 111 { 112 char *lp, *tp; 113 char ifnamecp[LIFNAMSIZ]; 114 115 /* snag a copy we can modify */ 116 if (strlcpy(ifnamecp, ifname, LIFNAMSIZ) >= LIFNAMSIZ) { 117 errno = EINVAL; 118 return (B_FALSE); 119 } 120 121 ifsp->ifsp_lunvalid = B_FALSE; 122 123 /* 124 * An interface name must have the format of: 125 * dev[ppa][:lun] 126 * 127 * lun - logical unit number. 128 */ 129 130 /* Any logical units? */ 131 lp = strchr(ifnamecp, ':'); 132 if (lp != NULL) { 133 if (getlun(lp, strlen(lp), &ifsp->ifsp_lun) != 0) 134 return (B_FALSE); 135 ifsp->ifsp_lunvalid = B_TRUE; 136 } 137 138 (void) strlcpy(ifsp->ifsp_devnm, ifnamecp, LIFNAMSIZ); 139 140 /* Find ppa */ 141 if (getppa(ifsp->ifsp_devnm, strlen(ifsp->ifsp_devnm), 142 &ifsp->ifsp_ppa) != 0) { 143 return (B_FALSE); 144 } 145 146 /* strip the ppa off of the device name if present */ 147 for (tp = &ifsp->ifsp_devnm[strlen(ifsp->ifsp_devnm) - 1]; 148 tp >= ifsp->ifsp_devnm && isdigit(*tp); tp--) { 149 *tp = '\0'; 150 } 151 152 return (B_TRUE); 153 } 154