File: | src/lib/libpcap/etherent.c |
Warning: | line 106, column 7 Assigned value is garbage or undefined |
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1 | /* $OpenBSD: etherent.c,v 1.9 2015/11/17 21:39:23 mmcc Exp $ */ | |||
2 | ||||
3 | /* | |||
4 | * Copyright (c) 1990, 1993, 1994, 1995, 1996 | |||
5 | * The Regents of the University of California. All rights reserved. | |||
6 | * | |||
7 | * Redistribution and use in source and binary forms, with or without | |||
8 | * modification, are permitted provided that: (1) source code distributions | |||
9 | * retain the above copyright notice and this paragraph in its entirety, (2) | |||
10 | * distributions including binary code include the above copyright notice and | |||
11 | * this paragraph in its entirety in the documentation or other materials | |||
12 | * provided with the distribution, and (3) all advertising materials mentioning | |||
13 | * features or use of this software display the following acknowledgement: | |||
14 | * ``This product includes software developed by the University of California, | |||
15 | * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of | |||
16 | * the University nor the names of its contributors may be used to endorse | |||
17 | * or promote products derived from this software without specific prior | |||
18 | * written permission. | |||
19 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED | |||
20 | * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF | |||
21 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |||
22 | */ | |||
23 | ||||
24 | #include <sys/types.h> | |||
25 | ||||
26 | #include <ctype.h> | |||
27 | #include <stdio.h> | |||
28 | #include <string.h> | |||
29 | ||||
30 | #include "pcap-int.h" | |||
31 | ||||
32 | #include <pcap-namedb.h> | |||
33 | #ifdef HAVE_OS_PROTO_H | |||
34 | #include "os-proto.h" | |||
35 | #endif | |||
36 | ||||
37 | static __inline int xdtoi(int); | |||
38 | static __inline int skip_space(FILE *); | |||
39 | static __inline int skip_line(FILE *); | |||
40 | ||||
41 | /* Hex digit to integer. */ | |||
42 | static __inline int | |||
43 | xdtoi(c) | |||
44 | int c; | |||
45 | { | |||
46 | if (isdigit(c)) | |||
47 | return c - '0'; | |||
48 | else if (islower(c)) | |||
49 | return c - 'a' + 10; | |||
50 | else | |||
51 | return c - 'A' + 10; | |||
52 | } | |||
53 | ||||
54 | static __inline int | |||
55 | skip_space(f) | |||
56 | FILE *f; | |||
57 | { | |||
58 | int c; | |||
59 | ||||
60 | do { | |||
61 | c = getc(f)(!__isthreaded ? (--(f)->_r < 0 ? __srget(f) : (int)(*( f)->_p++)) : (getc)(f)); | |||
62 | } while (isspace(c) && c != '\n'); | |||
63 | ||||
64 | return c; | |||
65 | } | |||
66 | ||||
67 | static __inline int | |||
68 | skip_line(f) | |||
69 | FILE *f; | |||
70 | { | |||
71 | int c; | |||
72 | ||||
73 | do | |||
74 | c = getc(f)(!__isthreaded ? (--(f)->_r < 0 ? __srget(f) : (int)(*( f)->_p++)) : (getc)(f)); | |||
75 | while (c != '\n' && c != EOF(-1)); | |||
76 | ||||
77 | return c; | |||
78 | } | |||
79 | ||||
80 | struct pcap_etherent * | |||
81 | pcap_next_etherent(FILE *fp) | |||
82 | { | |||
83 | int c, d, i; | |||
84 | char *bp; | |||
85 | static struct pcap_etherent e; | |||
86 | ||||
87 | memset((char *)&e, 0, sizeof(e)); | |||
88 | do { | |||
89 | /* Find addr */ | |||
90 | c = skip_space(fp); | |||
91 | if (c == '\n') | |||
| ||||
92 | continue; | |||
93 | ||||
94 | /* If this is a comment, or first thing on line | |||
95 | cannot be etehrnet address, skip the line. */ | |||
96 | if (!isxdigit(c)) { | |||
97 | c = skip_line(fp); | |||
98 | continue; | |||
99 | } | |||
100 | ||||
101 | /* must be the start of an address */ | |||
102 | for (i = 0; i < 6; i += 1) { | |||
103 | d = xdtoi(c); | |||
104 | c = getc(fp)(!__isthreaded ? (--(fp)->_r < 0 ? __srget(fp) : (int)( *(fp)->_p++)) : (getc)(fp)); | |||
105 | if (isxdigit(c)) { | |||
106 | d <<= 4; | |||
| ||||
107 | d |= xdtoi(c); | |||
108 | c = getc(fp)(!__isthreaded ? (--(fp)->_r < 0 ? __srget(fp) : (int)( *(fp)->_p++)) : (getc)(fp)); | |||
109 | } | |||
110 | e.addr[i] = d; | |||
111 | if (c != ':') | |||
112 | break; | |||
113 | c = getc(fp)(!__isthreaded ? (--(fp)->_r < 0 ? __srget(fp) : (int)( *(fp)->_p++)) : (getc)(fp)); | |||
114 | } | |||
115 | if (c == EOF(-1)) | |||
116 | break; | |||
117 | ||||
118 | /* Must be whitespace */ | |||
119 | if (!isspace(c)) { | |||
120 | c = skip_line(fp); | |||
121 | continue; | |||
122 | } | |||
123 | c = skip_space(fp); | |||
124 | ||||
125 | /* hit end of line... */ | |||
126 | if (c == '\n') | |||
127 | continue; | |||
128 | ||||
129 | if (c == '#') { | |||
130 | c = skip_line(fp); | |||
131 | continue; | |||
132 | } | |||
133 | ||||
134 | /* pick up name */ | |||
135 | bp = e.name; | |||
136 | /* Use 'd' to prevent buffer overflow. */ | |||
137 | d = sizeof(e.name) - 1; | |||
138 | do { | |||
139 | *bp++ = c; | |||
140 | c = getc(fp)(!__isthreaded ? (--(fp)->_r < 0 ? __srget(fp) : (int)( *(fp)->_p++)) : (getc)(fp)); | |||
141 | } while (!isspace(c) && c != EOF(-1) && --d > 0); | |||
142 | *bp = '\0'; | |||
143 | ||||
144 | /* Eat trailing junk */ | |||
145 | if (c != '\n') | |||
146 | (void)skip_line(fp); | |||
147 | ||||
148 | return &e; | |||
149 | ||||
150 | } while (c != EOF(-1)); | |||
151 | ||||
152 | return (NULL((void *)0)); | |||
153 | } |