Commit | Line | Data |
---|---|---|
bb0cfa24 DF |
1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
140b4f5f KB |
3 | * All rights reserved. |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
6 | * provided that this notice is preserved and that due credit is given | |
7 | * to the University of California at Berkeley. The name of the University | |
8 | * may not be used to endorse or promote products derived from this | |
9 | * software without specific prior written permission. This software | |
10 | * is provided ``as is'' without express or implied warranty. | |
bb0cfa24 DF |
11 | */ |
12 | ||
2ce81398 | 13 | #if defined(LIBC_SCCS) && !defined(lint) |
140b4f5f KB |
14 | static char sccsid[] = "@(#)inet_network.c 5.4 (Berkeley) %G%"; |
15 | #endif /* LIBC_SCCS and not lint */ | |
a03c8308 SL |
16 | |
17 | #include <sys/types.h> | |
a02e9915 | 18 | #include <netinet/in.h> |
a03c8308 SL |
19 | #include <ctype.h> |
20 | ||
21 | /* | |
22 | * Internet network address interpretation routine. | |
23 | * The library routines call this routine to interpret | |
24 | * network numbers. | |
25 | */ | |
26 | u_long | |
27 | inet_network(cp) | |
28 | register char *cp; | |
29 | { | |
30 | register u_long val, base, n; | |
31 | register char c; | |
32 | u_long parts[4], *pp = parts; | |
48a5c215 | 33 | register int i; |
a03c8308 SL |
34 | |
35 | again: | |
36 | val = 0; base = 10; | |
37 | if (*cp == '0') | |
38 | base = 8, cp++; | |
39 | if (*cp == 'x' || *cp == 'X') | |
40 | base = 16, cp++; | |
41 | while (c = *cp) { | |
42 | if (isdigit(c)) { | |
43 | val = (val * base) + (c - '0'); | |
44 | cp++; | |
45 | continue; | |
46 | } | |
47 | if (base == 16 && isxdigit(c)) { | |
48 | val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A')); | |
49 | cp++; | |
50 | continue; | |
51 | } | |
52 | break; | |
53 | } | |
54 | if (*cp == '.') { | |
55 | if (pp >= parts + 4) | |
a02e9915 | 56 | return (INADDR_NONE); |
a03c8308 SL |
57 | *pp++ = val, cp++; |
58 | goto again; | |
59 | } | |
60 | if (*cp && !isspace(*cp)) | |
a02e9915 | 61 | return (INADDR_NONE); |
a03c8308 SL |
62 | *pp++ = val; |
63 | n = pp - parts; | |
64 | if (n > 4) | |
a02e9915 | 65 | return (INADDR_NONE); |
a03c8308 SL |
66 | for (val = 0, i = 0; i < n; i++) { |
67 | val <<= 8; | |
68 | val |= parts[i] & 0xff; | |
69 | } | |
70 | return (val); | |
71 | } |