2 * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
21 * Name to id translation routines used by the scanner.
22 * These functions are not time critical.
26 static const char rcsid[] _U_ =
27 "@(#) $Header: /tcpdump/master/libpcap/nametoaddr.c,v 1.77.2.4 2007/06/11 09:52:05 guy Exp $ (LBL)";
35 #include <pcap-stdinc.h>
39 #include <sys/param.h>
40 #include <sys/types.h> /* concession to AIX */
41 #include <sys/socket.h>
44 #include <netinet/in.h>
48 * XXX - why was this included even on UNIX?
55 #ifdef HAVE_ETHER_HOSTTON
57 * XXX - do we need any of this if <netinet/if_ether.h> doesn't declare
60 #ifdef HAVE_NETINET_IF_ETHER_H
61 struct mbuf; /* Squelch compiler warnings on some platforms for */
62 struct rtentry; /* declarations in <net/if.h> */
63 #include <net/if.h> /* for "struct ifnet" in "struct arpcom" on Solaris */
64 #include <netinet/if_ether.h>
65 #endif /* HAVE_NETINET_IF_ETHER_H */
66 #ifdef NETINET_ETHER_H_DECLARES_ETHER_HOSTTON
67 #include <netinet/ether.h>
68 #endif /* NETINET_ETHER_H_DECLARES_ETHER_HOSTTON */
69 #endif /* HAVE_ETHER_HOSTTON */
70 #include <arpa/inet.h>
83 #include <pcap-namedb.h>
85 #ifdef HAVE_OS_PROTO_H
90 #define NTOHL(x) (x) = ntohl(x)
91 #define NTOHS(x) (x) = ntohs(x)
94 static inline int xdtoi(int);
97 * Convert host name to internet address.
98 * Return 0 upon failure.
101 pcap_nametoaddr(const char *name)
104 static bpf_u_int32 *hlist[2];
109 if ((hp = gethostbyname(name)) != NULL) {
111 hlist[0] = (bpf_u_int32 *)hp->h_addr;
115 for (p = (bpf_u_int32 **)hp->h_addr_list; *p; ++p)
117 return (bpf_u_int32 **)hp->h_addr_list;
126 pcap_nametoaddrinfo(const char *name)
128 struct addrinfo hints, *res;
131 memset(&hints, 0, sizeof(hints));
132 hints.ai_family = PF_UNSPEC;
133 hints.ai_socktype = SOCK_STREAM; /*not really*/
134 hints.ai_protocol = IPPROTO_TCP; /*not really*/
135 error = getaddrinfo(name, NULL, &hints, &res);
144 * Convert net name to internet address.
145 * Return 0 upon failure.
148 pcap_nametonetaddr(const char *name)
153 if ((np = getnetbyname(name)) != NULL)
159 * There's no "getnetbyname()" on Windows.
166 * Convert a port name to its port and protocol numbers.
167 * We assume only TCP or UDP.
168 * Return 0 upon failure.
171 pcap_nametoport(const char *name, int *port, int *proto)
178 * We need to check /etc/services for ambiguous entries.
179 * If we find the ambiguous entry, and it has the
180 * same port number, change the proto to PROTO_UNDEF
181 * so both TCP and UDP will be checked.
183 sp = getservbyname(name, "tcp");
184 if (sp != NULL) tcp_port = ntohs(sp->s_port);
185 sp = getservbyname(name, "udp");
186 if (sp != NULL) udp_port = ntohs(sp->s_port);
189 *proto = IPPROTO_TCP;
191 if (udp_port == tcp_port)
192 *proto = PROTO_UNDEF;
195 /* Can't handle ambiguous names that refer
196 to different port numbers. */
197 warning("ambiguous port %s in /etc/services",
205 *proto = IPPROTO_UDP;
208 #if defined(ultrix) || defined(__osf__)
209 /* Special hack in case NFS isn't in /etc/services */
210 if (strcmp(name, "nfs") == 0) {
212 *proto = PROTO_UNDEF;
220 * Convert a string in the form PPP-PPP, where correspond to ports, to
221 * a starting and ending port in a port range.
222 * Return 0 on failure.
225 pcap_nametoportrange(const char *name, int *port1, int *port2, int *proto)
231 if (sscanf(name, "%d-%d", &p1, &p2) != 2) {
232 if ((cpy = strdup(name)) == NULL)
235 if ((off = strchr(cpy, '-')) == NULL) {
242 if (pcap_nametoport(cpy, port1, proto) == 0) {
248 if (pcap_nametoport(off + 1, port2, proto) == 0) {
253 if (*proto != save_proto)
254 *proto = PROTO_UNDEF;
258 *proto = PROTO_UNDEF;
265 pcap_nametoproto(const char *str)
269 p = getprotobyname(str);
276 #include "ethertype.h"
283 /* Static data base of ether protocol types. */
284 struct eproto eproto_db[] = {
285 { "pup", ETHERTYPE_PUP },
286 { "xns", ETHERTYPE_NS },
287 { "ip", ETHERTYPE_IP },
289 { "ip6", ETHERTYPE_IPV6 },
291 { "arp", ETHERTYPE_ARP },
292 { "rarp", ETHERTYPE_REVARP },
293 { "sprite", ETHERTYPE_SPRITE },
294 { "mopdl", ETHERTYPE_MOPDL },
295 { "moprc", ETHERTYPE_MOPRC },
296 { "decnet", ETHERTYPE_DN },
297 { "lat", ETHERTYPE_LAT },
298 { "sca", ETHERTYPE_SCA },
299 { "lanbridge", ETHERTYPE_LANBRIDGE },
300 { "vexp", ETHERTYPE_VEXP },
301 { "vprod", ETHERTYPE_VPROD },
302 { "atalk", ETHERTYPE_ATALK },
303 { "atalkarp", ETHERTYPE_AARP },
304 { "loopback", ETHERTYPE_LOOPBACK },
305 { "decdts", ETHERTYPE_DECDTS },
306 { "decdns", ETHERTYPE_DECDNS },
311 pcap_nametoeproto(const char *s)
313 struct eproto *p = eproto_db;
316 if (strcmp(p->s, s) == 0)
325 /* Static data base of LLC values. */
326 static struct eproto llc_db[] = {
327 { "iso", LLCSAP_ISONS },
328 { "stp", LLCSAP_8021D },
329 { "ipx", LLCSAP_IPX },
330 { "netbeui", LLCSAP_NETBEUI },
335 pcap_nametollc(const char *s)
337 struct eproto *p = llc_db;
340 if (strcmp(p->s, s) == 0)
347 /* Hex digit to integer. */
361 __pcap_atoin(const char *s, bpf_u_int32 *addr)
370 while (*s && *s != '.')
371 n = n * 10 + *s++ - '0';
383 __pcap_atodn(const char *s, bpf_u_int32 *addr)
386 #define AREAMASK 0176000
387 #define NODEMASK 01777
391 if (sscanf(s, "%d.%d", &area, &node) != 2)
392 bpf_error("malformed decnet address '%s'", s);
394 *addr = (area << AREASHIFT) & AREAMASK;
395 *addr |= (node & NODEMASK);
401 * Convert 's' which has the form "xx:xx:xx:xx:xx:xx" into a new
402 * ethernet address. Assumes 's' is well formed.
405 pcap_ether_aton(const char *s)
407 register u_char *ep, *e;
410 e = ep = (u_char *)malloc(6);
416 if (isxdigit((unsigned char)*s)) {
426 #ifndef HAVE_ETHER_HOSTTON
429 pcap_ether_hostton(const char *name)
431 register struct pcap_etherent *ep;
433 static FILE *fp = NULL;
437 fp = fopen(PCAP_ETHERS_FILE, "r");
441 } else if (fp == NULL)
446 while ((ep = pcap_next_etherent(fp)) != NULL) {
447 if (strcmp(ep->name, name) == 0) {
448 ap = (u_char *)malloc(6);
450 memcpy(ap, ep->addr, 6);
460 #if !defined(HAVE_DECL_ETHER_HOSTTON) || !HAVE_DECL_ETHER_HOSTTON
461 #ifndef HAVE_STRUCT_ETHER_ADDR
463 unsigned char ether_addr_octet[6];
466 extern int ether_hostton(const char *, struct ether_addr *);
469 /* Use the os supplied routines */
471 pcap_ether_hostton(const char *name)
477 if (ether_hostton(name, (struct ether_addr *)a) == 0) {
478 ap = (u_char *)malloc(6);
480 memcpy((char *)ap, (char *)a, 6);
487 __pcap_nametodnaddr(const char *name)
490 struct nodeent *getnodebyname();
494 nep = getnodebyname(name);
495 if (nep == ((struct nodeent *)0))
496 bpf_error("unknown decnet host name '%s'\n", name);
498 memcpy((char *)&res, (char *)nep->n_addr, sizeof(unsigned short));
501 bpf_error("decnet name support not included, '%s' cannot be translated\n",