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/* $OpenBSD: nametoaddr.c,v 1.4 1997/06/27 02:16:23 deraadt Exp $ */
/* From NetBSD: nametoaddr.c,v 1.3 1995/04/29 05:42:23 cgd Exp */
/*
* Copyright (c) 1990, 1991, 1992, 1993, 1994
* 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
#if 0
from: static char rcsid[] =
"@(#) Header: nametoaddr.c,v 1.21 94/06/20 19:07:54 leres Exp (LBL)";
#else
static char rcsid[] = "$OpenBSD: nametoaddr.c,v 1.4 1997/06/27 02:16:23 deraadt Exp $";
#endif
#endif
#include <stdio.h>
#if defined(__NetBSD__) || defined(__OpenBSD__)
#include <stdlib.h>
#include <string.h>
#endif
#include <ctype.h>
#include <errno.h>
#include <netdb.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/ppp_defs.h>
#include "bpf_compile.h"
#include "gencode.h"
#ifndef __GNUC__
#define inline
#endif
#ifndef NTOHL
#define NTOHL(x) (x) = ntohl(x)
#define NTOHS(x) (x) = ntohs(x)
#endif
/*
* Convert host name to internet address.
* Return 0 upon failure.
*/
u_int32_t **
pcap_nametoaddr(const char *name)
{
#ifndef h_addr
static u_int32_t *hlist[2];
#endif
u_int32_t **p;
struct hostent *hp;
if ((hp = gethostbyname(name)) != NULL) {
#ifndef h_addr
hlist[0] = (u_int32_t *)hp->h_addr;
NTOHL(hp->h_addr);
return hlist;
#else
for (p = (u_int32_t **)hp->h_addr_list; *p; ++p)
NTOHL(**p);
return (u_int32_t **)hp->h_addr_list;
#endif
}
else
return 0;
}
/*
* Convert net name to internet address.
* Return 0 upon failure.
*/
u_int32_t
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);
if (*port != sp->s_port)
/* Can't handle ambiguous names that refer
to different port numbers. */
#ifdef notdef
warning("ambiguous port %s in /etc/services",
name);
#else
;
#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;
}
u_int32_t
__pcap_atoin(const char *s)
{
u_int32_t addr = 0;
u_int n;
while (1) {
n = 0;
while (*s && *s != '.')
n = n * 10 + *s++ - '0';
addr <<= 8;
addr |= n & 0xff;
if (*s == '\0')
return addr;
++s;
}
/* NOTREACHED */
}
struct pppproto {
char *s;
u_short p;
};
/* Static data base of PPP protocol types. */
struct pppproto pppproto_db[] = {
{ "ip", PPP_IP },
{ (char *)0, 0 }
};
int
pcap_nametopppproto(const char *s)
{
struct pppproto *p = pppproto_db;
while (p->s != 0) {
if (strcmp(p->s, s) == 0)
return p->p;
p += 1;
}
return PROTO_UNDEF;
}
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