aboutsummaryrefslogtreecommitdiff
path: root/libpcap/nametoaddr.c
blob: a1aa47ab0ac2bde1d66cb3744f5d34ec63c46969 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
/*
 * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that: (1) source code distributions
 * retain the above copyright notice and this paragraph in its entirety, (2)
 * distributions including binary code include the above copyright notice and
 * this paragraph in its entirety in the documentation or other materials
 * provided with the distribution, and (3) all advertising materials mentioning
 * features or use of this software display the following acknowledgement:
 * ``This product includes software developed by the University of California,
 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
 * the University nor the names of its contributors may be used to endorse
 * or promote products derived from this software without specific prior
 * written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 * Name to id translation routines used by the scanner.
 * These functions are not time critical.
 */

#ifndef lint
static const char rcsid[] =
    "@(#) $Header: /cvsroot/ipacct/ipacct/libpcap/Attic/nametoaddr.c,v 1.1.1.1 2001/05/31 13:40:52 gray Exp $ (LBL)";
#endif

#if defined(HAVE_CONFIG_H)
# include <config.h>
#endif

#include <sys/param.h>
#include <sys/types.h>				/* concession to AIX */
#include <sys/socket.h>
#include <sys/time.h>

#if __STDC__
struct mbuf;
struct rtentry;
#endif

#include <net/if.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <arpa/inet.h>

#include <ctype.h>
#include <errno.h>
#include <stdlib.h>
#include <memory.h>
#include <netdb.h>
#include <stdio.h>

#include <pcap-int.h>

#include <gencode.h>
#include <pcap-namedb.h>

#include <gnuc.h>
#ifdef HAVE_OS_PROTO_H
#include <os-proto.h>
#endif

#ifndef NTOHL
#define NTOHL(x) (x) = ntohl(x)
#define NTOHS(x) (x) = ntohs(x)
#endif

static inline int xdtoi(int);

/*
 *  Convert host name to internet address.
 *  Return 0 upon failure.
 */
bpf_u_int32 **
pcap_nametoaddr(const char *name)
{
#ifndef h_addr
	static bpf_u_int32 *hlist[2];
#endif
	bpf_u_int32 **p;
	struct hostent *hp;

	if ((hp = gethostbyname(name)) != NULL) {
#ifndef h_addr
		hlist[0] = (bpf_u_int32 *)hp->h_addr;
		NTOHL(hp->h_addr);
		return hlist;
#else
		for (p = (bpf_u_int32 **)hp->h_addr_list; *p; ++p)
			NTOHL(**p);
		return (bpf_u_int32 **)hp->h_addr_list;
#endif
	}
	else
		return 0;
}

/*
 *  Convert net name to internet address.
 *  Return 0 upon failure.
 */
bpf_u_int32
pcap_nametonetaddr(const char *name)
{
	struct netent *np;

	if ((np = getnetbyname(name)) != NULL)
		return np->n_net;
	else
		return 0;
}

/*
 * Convert a port name to its port and protocol numbers.
 * We assume only TCP or UDP.
 * Return 0 upon failure.
 */
int
pcap_nametoport(const char *name, int *port, int *proto)
{
	struct servent *sp;
	char *other;

	sp = getservbyname(name, (char *)0);
	if (sp != NULL) {
		NTOHS(sp->s_port);
		*port = sp->s_port;
		*proto = pcap_nametoproto(sp->s_proto);
		/*
		 * We need to check /etc/services for ambiguous entries.
		 * If we find the ambiguous entry, and it has the
		 * same port number, change the proto to PROTO_UNDEF
		 * so both TCP and UDP will be checked.
		 */
		if (*proto == IPPROTO_TCP)
			other = "udp";
		else
			other = "tcp";

		sp = getservbyname(name, other);
		if (sp != 0) {
			NTOHS(sp->s_port);
#ifdef notdef
			if (*port != sp->s_port)
				/* Can't handle ambiguous names that refer
				   to different port numbers. */
				warning("ambiguous port %s in /etc/services",
					name);
#endif
			*proto = PROTO_UNDEF;
		}
		return 1;
	}
#if defined(ultrix) || defined(__osf__)
	/* Special hack in case NFS isn't in /etc/services */
	if (strcmp(name, "nfs") == 0) {
		*port = 2049;
		*proto = PROTO_UNDEF;
		return 1;
	}
#endif
	return 0;
}

int
pcap_nametoproto(const char *str)
{
	struct protoent *p;

	p = getprotobyname(str);
	if (p != 0)
		return p->p_proto;
	else
		return PROTO_UNDEF;
}

#include "ethertype.h"

struct eproto {
	char *s;
	u_short p;
};

/* Static data base of ether protocol types. */
struct eproto eproto_db[] = {
	{ "pup", ETHERTYPE_PUP },
	{ "xns", ETHERTYPE_NS },
	{ "ip", ETHERTYPE_IP },
	{ "arp", ETHERTYPE_ARP },
	{ "rarp", ETHERTYPE_REVARP },
	{ "sprite", ETHERTYPE_SPRITE },
	{ "mopdl", ETHERTYPE_MOPDL },
	{ "moprc", ETHERTYPE_MOPRC },
	{ "decnet", ETHERTYPE_DN },
	{ "lat", ETHERTYPE_LAT },
	{ "sca", ETHERTYPE_SCA },
	{ "lanbridge", ETHERTYPE_LANBRIDGE },
	{ "vexp", ETHERTYPE_VEXP },
	{ "vprod", ETHERTYPE_VPROD },
	{ "atalk", ETHERTYPE_ATALK },
	{ "atalkarp", ETHERTYPE_AARP },
	{ "loopback", ETHERTYPE_LOOPBACK },
	{ "decdts", ETHERTYPE_DECDTS },
	{ "decdns", ETHERTYPE_DECDNS },
	{ (char *)0, 0 }
};

int
pcap_nametoeproto(const char *s)
{
	struct eproto *p = eproto_db;

	while (p->s != 0) {
		if (strcmp(p->s, s) == 0)
			return p->p;
		p += 1;
	}
	return PROTO_UNDEF;
}

/* Hex digit to integer. */
static inline int
xdtoi(c)
	register int c;
{
	if (isdigit(c))
		return c - '0';
	else if (islower(c))
		return c - 'a' + 10;
	else
		return c - 'A' + 10;
}

int
__pcap_atoin(const char *s, bpf_u_int32 *addr)
{
	u_int n;
	int len;

	*addr = 0;
	len = 0;
	while (1) {
		n = 0;
		while (*s && *s != '.')
			n = n * 10 + *s++ - '0';
		*addr <<= 8;
		*addr |= n & 0xff;
		len += 8;
		if (*s == '\0')
			return len;
		++s;
	}
	/* NOTREACHED */
}

int
__pcap_atodn(const char *s, bpf_u_int32 *addr)
{
#define AREASHIFT 10
#define AREAMASK 0176000
#define NODEMASK 01777

	u_int node, area;

	if (sscanf((char *)s, "%d.%d", &area, &node) != 2)
		bpf_error("malformed decnet address '%s'", s);

	*addr = (area << AREASHIFT) & AREAMASK;
	*addr |= (node & NODEMASK);

	return(32);
}

/*
 * Convert 's' which has the form "xx:xx:xx:xx:xx:xx" into a new
 * ethernet address.  Assumes 's' is well formed.
 */
u_char *
pcap_ether_aton(const char *s)
{
	register u_char *ep, *e;
	register u_int d;

	e = ep = (u_char *)malloc(6);

	while (*s) {
		if (*s == ':')
			s += 1;
		d = xdtoi(*s++);
		if (isxdigit(*s)) {
			d <<= 4;
			d |= xdtoi(*s++);
		}
		*ep++ = d;
	}

	return (e);
}

#ifndef HAVE_ETHER_HOSTTON
/* Roll our own */
u_char *
pcap_ether_hostton(const char *name)
{
	register struct pcap_etherent *ep;
	register u_char *ap;
	static FILE *fp = NULL;
	static init = 0;

	if (!init) {
		fp = fopen(PCAP_ETHERS_FILE, "r");
		++init;
		if (fp == NULL)
			return (NULL);
	} else if (fp == NULL)
		return (NULL);
	else
		rewind(fp);
	
	while ((ep = pcap_next_etherent(fp)) != NULL) {
		if (strcmp(ep->name, name) == 0) {
			ap = (u_char *)malloc(6);
			if (ap != NULL) {
				memcpy(ap, ep->addr, 6);
				return (ap);
			}
			break;
		}
	}
	return (NULL);
}
#else

#ifndef sgi
extern int ether_hostton(char *, struct ether_addr *);
#endif

/* Use the os supplied routines */
u_char *
pcap_ether_hostton(const char *name)
{
	register u_char *ap;
	u_char a[6];

	ap = NULL;
	if (ether_hostton((char *)name, (struct ether_addr *)a) == 0) {
		ap = (u_char *)malloc(6);
		if (ap != NULL)
			memcpy((char *)ap, (char *)a, 6);
	}
	return (ap);
}
#endif

u_short
__pcap_nametodnaddr(const char *name)
{
#ifdef	DECNETLIB
	struct nodeent *getnodebyname();
	struct nodeent *nep;
	unsigned short res;

	nep = getnodebyname(name);
	if (nep == ((struct nodeent *)0))
		bpf_error("unknown decnet host name '%s'\n", name);

	memcpy((char *)&res, (char *)nep->n_addr, sizeof(unsigned short));
	return(res);
#else
	bpf_error("decnet name support not included, '%s' cannot be translated\n",
		name);
#endif
}

Return to:

Send suggestions and report system problems to the System administrator.