minix/lib/libc/net/ethers.c
Ben Gras 2fe8fb192f Full switch to clang/ELF. Drop ack. Simplify.
There is important information about booting non-ack images in
docs/UPDATING. ack/aout-format images can't be built any more, and
booting clang/ELF-format ones is a little different. Updating to the
new boot monitor is recommended.

Changes in this commit:

	. drop boot monitor -> allowing dropping ack support
	. facility to copy ELF boot files to /boot so that old boot monitor
	  can still boot fairly easily, see UPDATING
	. no more ack-format libraries -> single-case libraries
	. some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases
	. drop several ack toolchain commands, but not all support
	  commands (e.g. aal is gone but acksize is not yet).
	. a few libc files moved to netbsd libc dir
	. new /bin/date as minix date used code in libc/
	. test compile fix
	. harmonize includes
	. /usr/lib is no longer special: without ack, /usr/lib plays no
	  kind of special bootstrapping role any more and bootstrapping
	  is done exclusively through packages, so releases depend even
	  less on the state of the machine making them now.
	. rename nbsd_lib* to lib*
	. reduce mtree
2012-02-14 14:52:02 +01:00

231 lines
4.7 KiB
C

/* $NetBSD: ethers.c,v 1.21 2006/10/15 10:55:01 martin Exp $ */
/*
* ethers(3N) a la Sun.
*
* Written by Roland McGrath <roland@frob.com> 10/14/93.
* Public domain.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: ethers.c,v 1.21 2006/10/15 10:55:01 martin Exp $");
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include <sys/param.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_ether.h>
#include <netinet/in.h>
#include <assert.h>
#include <errno.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef YP
#include <rpcsvc/ypclnt.h>
#endif
#ifdef __weak_alias
__weak_alias(ether_aton,_ether_aton)
__weak_alias(ether_hostton,_ether_hostton)
__weak_alias(ether_line,_ether_line)
__weak_alias(ether_ntoa,_ether_ntoa)
__weak_alias(ether_ntohost,_ether_ntohost)
#endif
#ifndef _PATH_ETHERS
#define _PATH_ETHERS "/etc/ethers"
#endif
char *
ether_ntoa(e)
const struct ether_addr *e;
{
static char a[18];
_DIAGASSERT(e != NULL);
(void) snprintf(a, sizeof a, "%02x:%02x:%02x:%02x:%02x:%02x",
e->ether_addr_octet[0], e->ether_addr_octet[1],
e->ether_addr_octet[2], e->ether_addr_octet[3],
e->ether_addr_octet[4], e->ether_addr_octet[5]);
return a;
}
struct ether_addr *
ether_aton(s)
const char *s;
{
static struct ether_addr n;
u_int i[6];
_DIAGASSERT(s != NULL);
if (sscanf(s, " %x:%x:%x:%x:%x:%x ", &i[0], &i[1],
&i[2], &i[3], &i[4], &i[5]) == 6) {
n.ether_addr_octet[0] = (u_char)i[0];
n.ether_addr_octet[1] = (u_char)i[1];
n.ether_addr_octet[2] = (u_char)i[2];
n.ether_addr_octet[3] = (u_char)i[3];
n.ether_addr_octet[4] = (u_char)i[4];
n.ether_addr_octet[5] = (u_char)i[5];
return &n;
}
return NULL;
}
int
ether_ntohost(hostname, e)
char *hostname;
const struct ether_addr *e;
{
FILE *f;
char *p;
size_t len;
struct ether_addr try;
#ifdef YP
char trybuf[sizeof "xx:xx:xx:xx:xx:xx"];
int trylen;
#endif
_DIAGASSERT(hostname != NULL);
_DIAGASSERT(e != NULL);
#ifdef YP
trylen = snprintf(trybuf, sizeof trybuf, "%x:%x:%x:%x:%x:%x",
e->ether_addr_octet[0], e->ether_addr_octet[1],
e->ether_addr_octet[2], e->ether_addr_octet[3],
e->ether_addr_octet[4], e->ether_addr_octet[5]);
#endif
f = fopen(_PATH_ETHERS, "r");
if (f == NULL)
return -1;
while ((p = fgetln(f, &len)) != NULL) {
if (p[len - 1] != '\n')
continue; /* skip lines w/o \n */
p[--len] = '\0';
#ifdef YP
/* A + in the file means try YP now. */
if (len == 1 && *p == '+') {
char *ypbuf, *ypdom;
int ypbuflen;
if (yp_get_default_domain(&ypdom))
continue;
if (yp_match(ypdom, "ethers.byaddr", trybuf,
trylen, &ypbuf, &ypbuflen))
continue;
if (ether_line(ypbuf, &try, hostname) == 0) {
free(ypbuf);
(void)fclose(f);
return 0;
}
free(ypbuf);
continue;
}
#endif
if (ether_line(p, &try, hostname) == 0 &&
memcmp(&try, e, sizeof try) == 0) {
(void)fclose(f);
return 0;
}
}
(void)fclose(f);
errno = ENOENT;
return -1;
}
int
ether_hostton(hostname, e)
const char *hostname;
struct ether_addr *e;
{
FILE *f;
char *p;
size_t len;
char try[MAXHOSTNAMELEN + 1];
#ifdef YP
int hostlen = strlen(hostname);
#endif
_DIAGASSERT(hostname != NULL);
_DIAGASSERT(e != NULL);
f = fopen(_PATH_ETHERS, "r");
if (f==NULL)
return -1;
while ((p = fgetln(f, &len)) != NULL) {
if (p[len - 1] != '\n')
continue; /* skip lines w/o \n */
p[--len] = '\0';
#ifdef YP
/* A + in the file means try YP now. */
if (len == 1 && *p == '+') {
char *ypbuf, *ypdom;
int ypbuflen;
if (yp_get_default_domain(&ypdom))
continue;
if (yp_match(ypdom, "ethers.byname", hostname, hostlen,
&ypbuf, &ypbuflen))
continue;
if (ether_line(ypbuf, e, try) == 0) {
free(ypbuf);
(void)fclose(f);
return 0;
}
free(ypbuf);
continue;
}
#endif
if (ether_line(p, e, try) == 0 && strcmp(hostname, try) == 0) {
(void)fclose(f);
return 0;
}
}
(void)fclose(f);
errno = ENOENT;
return -1;
}
int
ether_line(l, e, hostname)
const char *l;
struct ether_addr *e;
char *hostname;
{
u_int i[6];
#define S2(arg) #arg
#define S1(arg) S2(arg)
static const char fmt[] = " %x:%x:%x:%x:%x:%x"
" %" S1(MAXHOSTNAMELEN) "s\n";
#undef S2
#undef S1
_DIAGASSERT(l != NULL);
_DIAGASSERT(e != NULL);
_DIAGASSERT(hostname != NULL);
if (sscanf(l, fmt,
&i[0], &i[1], &i[2], &i[3], &i[4], &i[5], hostname) == 7) {
e->ether_addr_octet[0] = (u_char)i[0];
e->ether_addr_octet[1] = (u_char)i[1];
e->ether_addr_octet[2] = (u_char)i[2];
e->ether_addr_octet[3] = (u_char)i[3];
e->ether_addr_octet[4] = (u_char)i[4];
e->ether_addr_octet[5] = (u_char)i[5];
return 0;
}
errno = EINVAL;
return -1;
}