Annotation of embedaddon/libpdel/structs/type/structs_type_ip4.c, revision 1.1.1.1
1.1 misho 1:
2: /*
3: * Copyright (c) 2001-2002 Packet Design, LLC.
4: * All rights reserved.
5: *
6: * Subject to the following obligations and disclaimer of warranty,
7: * use and redistribution of this software, in source or object code
8: * forms, with or without modifications are expressly permitted by
9: * Packet Design; provided, however, that:
10: *
11: * (i) Any and all reproductions of the source or object code
12: * must include the copyright notice above and the following
13: * disclaimer of warranties; and
14: * (ii) No rights are granted, in any manner or form, to use
15: * Packet Design trademarks, including the mark "PACKET DESIGN"
16: * on advertising, endorsements, or otherwise except as such
17: * appears in the above copyright notice or in the software.
18: *
19: * THIS SOFTWARE IS BEING PROVIDED BY PACKET DESIGN "AS IS", AND
20: * TO THE MAXIMUM EXTENT PERMITTED BY LAW, PACKET DESIGN MAKES NO
21: * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING
22: * THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED
23: * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
24: * OR NON-INFRINGEMENT. PACKET DESIGN DOES NOT WARRANT, GUARANTEE,
25: * OR MAKE ANY REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS
26: * OF THE USE OF THIS SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY,
27: * RELIABILITY OR OTHERWISE. IN NO EVENT SHALL PACKET DESIGN BE
28: * LIABLE FOR ANY DAMAGES RESULTING FROM OR ARISING OUT OF ANY USE
29: * OF THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY DIRECT,
30: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE, OR CONSEQUENTIAL
31: * DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, LOSS OF
32: * USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY THEORY OF
33: * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
35: * THE USE OF THIS SOFTWARE, EVEN IF PACKET DESIGN IS ADVISED OF
36: * THE POSSIBILITY OF SUCH DAMAGE.
37: *
38: * Author: Archie Cobbs <archie@freebsd.org>
39: */
40:
41: #include <sys/types.h>
42: #include <sys/socket.h>
43: #include <netinet/in.h>
44: #include <arpa/inet.h>
45: #include <net/ethernet.h>
46:
47: #include <stdio.h>
48: #include <stdlib.h>
49: #include <stdarg.h>
50: #include <string.h>
51: #include <errno.h>
52: #include <ctype.h>
53:
54: #include "structs/structs.h"
55: #include "structs/type/array.h"
56: #include "structs/type/ip4.h"
57: #include "util/typed_mem.h"
58:
59: /*********************************************************************
60: IPv4 ADDRESS TYPE
61: *********************************************************************/
62:
63: static structs_ascify_t structs_ip4_ascify;
64: static structs_binify_t structs_ip4_binify;
65:
66: static char *
67: structs_ip4_ascify(const struct structs_type *type,
68: const char *mtype, const void *data)
69: {
70: const u_char *const bytes
71: = (const u_char *)&((const struct in_addr *)data)->s_addr;
72: char buf[16];
73:
74: /* Don't use inet_ntoa(), it's not thread safe */
75: snprintf(buf, sizeof(buf), "%u.%u.%u.%u",
76: bytes[0], bytes[1], bytes[2], bytes[3]);
77: return (STRDUP(mtype, buf));
78: }
79:
80: static int
81: structs_ip4_binify(const struct structs_type *type,
82: const char *ascii, void *data, char *ebuf, size_t emax)
83: {
84: char buf[32];
85: char *s;
86: char *t;
87: int val;
88: int i;
89:
90: /* Trim whitespace */
91: while (isspace(*ascii))
92: ascii++;
93: strlcpy(buf, ascii, sizeof(buf));
94: for (i = strlen(buf); i > 0 && isspace(buf[i - 1]); i--);
95: buf[i] = '\0';
96:
97: /* Parse each byte */
98: for (s = buf, i = 0; i < 4; s = t, i++) {
99: for (t = s; isdigit(*t); t++);
100: if (*t != ((i < 3) ? '.' : '\0'))
101: goto bogus;
102: if (t - s < 1 || t - s > 3)
103: goto bogus;
104: *t++ = '\0';
105: if ((val = atoi(s)) > 255)
106: goto bogus;
107: ((u_char *)data)[i] = (u_char)val;
108: }
109:
110: /* OK */
111: return (0);
112:
113: bogus:
114: strlcpy(ebuf, "invalid IP address", emax);
115: errno = EINVAL;
116: return (-1);
117: }
118:
119: const struct structs_type structs_type_ip4 = {
120: sizeof(struct in_addr),
121: "ip4",
122: STRUCTS_TYPE_PRIMITIVE,
123: structs_region_init,
124: structs_region_copy,
125: structs_region_equal,
126: structs_ip4_ascify,
127: structs_ip4_binify,
128: structs_region_encode,
129: structs_region_decode,
130: structs_nothing_free,
131: };
132:
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