1 /* 2 * Copyright (c) 1990, 1993, 1994, 1995, 1996 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that: (1) source code distributions 7 * retain the above copyright notice and this paragraph in its entirety, (2) 8 * distributions including binary code include the above copyright notice and 9 * this paragraph in its entirety in the documentation or other materials 10 * provided with the distribution, and (3) all advertising materials mentioning 11 * features or use of this software display the following acknowledgement: 12 * ``This product includes software developed by the University of California, 13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 14 * the University nor the names of its contributors may be used to endorse 15 * or promote products derived from this software without specific prior 16 * written permission. 17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 20 */ 21 22 #ifdef HAVE_CONFIG_H 23 #include "config.h" 24 #endif 25 26 #ifdef _WIN32 27 #include <pcap-stdinc.h> 28 #else /* _WIN32 */ 29 #if HAVE_INTTYPES_H 30 #include <inttypes.h> 31 #elif HAVE_STDINT_H 32 #include <stdint.h> 33 #endif 34 #ifdef HAVE_SYS_BITYPES_H 35 #include <sys/bitypes.h> 36 #endif 37 #include <sys/types.h> 38 #endif /* _WIN32 */ 39 40 #include <ctype.h> 41 #include <memory.h> 42 #include <stdio.h> 43 #include <string.h> 44 45 #include "pcap-int.h" 46 47 #include <pcap/namedb.h> 48 49 #ifdef HAVE_OS_PROTO_H 50 #include "os-proto.h" 51 #endif 52 53 static inline int xdtoi(int); 54 static inline int skip_space(FILE *); 55 static inline int skip_line(FILE *); 56 57 /* Hex digit to integer. */ 58 static inline int 59 xdtoi(c) 60 register int c; 61 { 62 if (isdigit(c)) 63 return c - '0'; 64 else if (islower(c)) 65 return c - 'a' + 10; 66 else 67 return c - 'A' + 10; 68 } 69 70 static inline int 71 skip_space(f) 72 FILE *f; 73 { 74 int c; 75 76 do { 77 c = getc(f); 78 } while (isspace(c) && c != '\n'); 79 80 return c; 81 } 82 83 static inline int 84 skip_line(f) 85 FILE *f; 86 { 87 int c; 88 89 do 90 c = getc(f); 91 while (c != '\n' && c != EOF); 92 93 return c; 94 } 95 96 struct pcap_etherent * 97 pcap_next_etherent(FILE *fp) 98 { 99 register int c, d, i; 100 char *bp; 101 static struct pcap_etherent e; 102 103 memset((char *)&e, 0, sizeof(e)); 104 do { 105 /* Find addr */ 106 c = skip_space(fp); 107 if (c == '\n') 108 continue; 109 110 /* If this is a comment, or first thing on line 111 cannot be etehrnet address, skip the line. */ 112 if (!isxdigit(c)) { 113 c = skip_line(fp); 114 continue; 115 } 116 117 /* must be the start of an address */ 118 for (i = 0; i < 6; i += 1) { 119 d = xdtoi(c); 120 c = getc(fp); 121 if (isxdigit(c)) { 122 d <<= 4; 123 d |= xdtoi(c); 124 c = getc(fp); 125 } 126 e.addr[i] = d; 127 if (c != ':') 128 break; 129 c = getc(fp); 130 } 131 if (c == EOF) 132 break; 133 134 /* Must be whitespace */ 135 if (!isspace(c)) { 136 c = skip_line(fp); 137 continue; 138 } 139 c = skip_space(fp); 140 141 /* hit end of line... */ 142 if (c == '\n') 143 continue; 144 145 if (c == '#') { 146 c = skip_line(fp); 147 continue; 148 } 149 150 /* pick up name */ 151 bp = e.name; 152 /* Use 'd' to prevent buffer overflow. */ 153 d = sizeof(e.name) - 1; 154 do { 155 *bp++ = c; 156 c = getc(fp); 157 } while (!isspace(c) && c != EOF && --d > 0); 158 *bp = '\0'; 159 160 /* Eat trailing junk */ 161 if (c != '\n') 162 (void)skip_line(fp); 163 164 return &e; 165 166 } while (c != EOF); 167 168 return (NULL); 169 } 170