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bb0cfa24 DF |
1 | /* |
2 | * Copyright (c) 1983 Regents of the University of California. | |
140b4f5f KB |
3 | * All rights reserved. |
4 | * | |
269a7923 | 5 | * %sccs.include.redist.c% |
bb0cfa24 DF |
6 | */ |
7 | ||
2ce81398 | 8 | #if defined(LIBC_SCCS) && !defined(lint) |
dcdb79c9 | 9 | static char sccsid[] = "@(#)inet_network.c 5.8 (Berkeley) %G%"; |
140b4f5f | 10 | #endif /* LIBC_SCCS and not lint */ |
a03c8308 SL |
11 | |
12 | #include <sys/types.h> | |
a02e9915 | 13 | #include <netinet/in.h> |
24fac7d8 | 14 | #include <arpa/inet.h> |
dcdb79c9 | 15 | #include <ctype.h> |
a03c8308 SL |
16 | |
17 | /* | |
18 | * Internet network address interpretation routine. | |
19 | * The library routines call this routine to interpret | |
20 | * network numbers. | |
21 | */ | |
22 | u_long | |
23 | inet_network(cp) | |
24fac7d8 | 24 | register const char *cp; |
a03c8308 SL |
25 | { |
26 | register u_long val, base, n; | |
27 | register char c; | |
28 | u_long parts[4], *pp = parts; | |
48a5c215 | 29 | register int i; |
a03c8308 SL |
30 | |
31 | again: | |
32 | val = 0; base = 10; | |
33 | if (*cp == '0') | |
34 | base = 8, cp++; | |
35 | if (*cp == 'x' || *cp == 'X') | |
36 | base = 16, cp++; | |
37 | while (c = *cp) { | |
38 | if (isdigit(c)) { | |
39 | val = (val * base) + (c - '0'); | |
40 | cp++; | |
41 | continue; | |
42 | } | |
43 | if (base == 16 && isxdigit(c)) { | |
44 | val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A')); | |
45 | cp++; | |
46 | continue; | |
47 | } | |
48 | break; | |
49 | } | |
50 | if (*cp == '.') { | |
51 | if (pp >= parts + 4) | |
a02e9915 | 52 | return (INADDR_NONE); |
a03c8308 SL |
53 | *pp++ = val, cp++; |
54 | goto again; | |
55 | } | |
56 | if (*cp && !isspace(*cp)) | |
a02e9915 | 57 | return (INADDR_NONE); |
a03c8308 SL |
58 | *pp++ = val; |
59 | n = pp - parts; | |
60 | if (n > 4) | |
a02e9915 | 61 | return (INADDR_NONE); |
a03c8308 SL |
62 | for (val = 0, i = 0; i < n; i++) { |
63 | val <<= 8; | |
64 | val |= parts[i] & 0xff; | |
65 | } | |
66 | return (val); | |
67 | } |