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/*
* Copyright (c) 1988-1990 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 char rcsid[] =
"@(#) $Header: nametoaddr.c,v 1.9 91/02/04 16:56:46 mccanne Exp $ (LBL)";
#endif
#include <stdio.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netdb.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <errno.h>
#include <arpa/inet.h>
#ifdef ultrix
#include <sys/time.h>
#include <rpc/types.h>
#include <nfs/nfs.h>
#endif
#include "interface.h"
#include "etherent.h"
#include "nametoaddr.h"
/*
* Convert host name to internet address.
* Return 0 upon failure.
*/
u_long **
s_nametoaddr(name)
char *name;
{
#ifndef h_addr
static u_long *hlist[2];
#endif
u_long **p;
struct hostent *hp;
if (hp = gethostbyname(name)) {
#ifndef h_addr
hlist[0] = (u_long *)hp->h_addr;
NTOHL(hp->h_addr);
return hlist;
#else
for (p = (u_long **)hp->h_addr_list; *p; ++p)
NTOHL(**p);
return (u_long **)hp->h_addr_list;
#endif
}
else
return 0;
}
/*
* Convert net name to internet address.
* Return 0 upon failure.
*/
u_long
s_nametonetaddr(name)
char *name;
{
struct netent *np;
if (np = getnetbyname(name))
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.
*/
s_nametoport(name, port, proto)
char *name;
int *port;
int *proto;
{
struct servent *sp;
char *other;
sp = getservbyname(name, (char *)0);
if (sp != 0) {
NTOHS(sp->s_port);
*port = sp->s_port;
*proto = s_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 ambigous names that refer
to different port numbers. */
warning("ambiguous port %s in /etc/services",
name);
*proto = PROTO_UNDEF;
}
return 1;
}
#ifdef ultrix
/* Special hack in case NFS isn't in /etc/services */
if (strcmp(name, "nfs") == 0) {
*port = NFS_PORT;
*proto = PROTO_UNDEF;
return 1;
}
#endif
return 0;
}
int
s_nametoproto(str)
char *str;
{
struct protoent *p;
p = getprotobyname(str);
if (p != 0)
return p->p_proto;
else
return PROTO_UNDEF;
}
#include "etherproto.h"
int
s_nametoeproto(s)
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)
{
if (isdigit(c))
return c - '0';
else if (islower(c))
return c - 'a' + 10;
else
return c - 'A' + 10;
}
u_long
atoin(s)
char *s;
{
u_long 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 */
}
/*
* Convert 's' which has the form "xx:xx:xx:xx:xx:xx" into a new
* ethernet address. Assumes 's' is well formed.
*/
u_char *
ETHER_aton(s)
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 ETHER_SERVICE
u_char *
ETHER_hostton(name)
char *name;
{
struct etherent *ep;
FILE *fp;
u_char *ap;
fp = fopen(ETHERS_FILE, "r");
if (fp != 0) {
while (ep = next_etherent(fp)) {
if (strcmp(ep->name, name) == 0) {
ap = (u_char *)malloc(6);
bcopy(ep->addr, ap, 6);
return ap;
}
}
}
return (u_char *)0;
}
#endif
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