OpenSolaris_b135/lib/libsmbfs/smb/nb.c
/*
* Copyright (c) 2000, 2001 Boris Popov
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Boris Popov.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: nb.c,v 1.1.1.2 2001/07/06 22:38:42 conrad Exp $
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/param.h>
#include <sys/socket.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <unistd.h>
#include <libintl.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <cflib.h>
#include <netsmb/netbios.h>
#include <netsmb/smb_lib.h>
#include <netsmb/nb_lib.h>
void nb_ctx_setnbflags(struct nb_ctx *, int ns_ena, int bc_ena);
int nb_ctx_setwins(struct nb_ctx *, const char *, const char *);
/*
* API for seting NetBIOS name lookup flags:
* NetBIOS name lookup enable,
* NetBIOS broadcast enable.
*/
int
smb_ctx_setnbflags(struct smb_ctx *ctx, int ns_ena, int bc_ena)
{
struct nb_ctx *nb = ctx->ct_nb;
if (nb == NULL)
return (EINVAL);
nb_ctx_setnbflags(nb, ns_ena, bc_ena);
return (0);
}
/*
* API for library consumer to set wins1, wins2
*/
int
smb_ctx_setwins(struct smb_ctx *ctx, const char *wins1, const char *wins2)
{
struct nb_ctx *nb = ctx->ct_nb;
if (nb == NULL)
return (EINVAL);
return (nb_ctx_setwins(nb, wins1, wins2));
}
/*
* API for library consumer to set NB scope.
*/
int
smb_ctx_setscope(struct smb_ctx *ctx, const char *scope)
{
struct nb_ctx *nb = ctx->ct_nb;
if (nb == NULL)
return (EINVAL);
return (nb_ctx_setscope(nb, scope));
}
int
nb_ctx_create(struct nb_ctx **ctxpp)
{
struct nb_ctx *ctx;
ctx = malloc(sizeof (struct nb_ctx));
if (ctx == NULL)
return (ENOMEM);
bzero(ctx, sizeof (struct nb_ctx));
ctx->nb_flags = NBCF_NS_ENABLE | NBCF_BC_ENABLE;
*ctxpp = ctx;
return (0);
}
void
nb_ctx_done(struct nb_ctx *ctx)
{
if (ctx == NULL)
return;
if (ctx->nb_scope)
free(ctx->nb_scope);
if (ctx)
free(ctx);
}
void
nb_ctx_setnbflags(struct nb_ctx *nb, int ns_ena, int bc_ena)
{
nb->nb_flags &= ~(NBCF_NS_ENABLE | NBCF_BC_ENABLE);
if (ns_ena) {
nb->nb_flags = NBCF_NS_ENABLE;
if (bc_ena)
nb->nb_flags = NBCF_BC_ENABLE;
}
}
int
nb_ctx_setwins(struct nb_ctx *ctx, const char *wins1, const char *wins2)
{
struct in_addr ina;
int error;
if (wins1 == NULL) {
ctx->nb_wins1 = 0;
ctx->nb_wins2 = 0;
return (0);
}
error = nb_resolvehost_in(wins1, &ina);
if (error) {
smb_error(dgettext(TEXT_DOMAIN, "can't resolve %s"),
error, wins1);
return (error);
}
ctx->nb_wins1 = ina.s_addr;
if (wins2 == NULL)
ctx->nb_wins2 = 0;
else {
error = nb_resolvehost_in(wins2, &ina);
if (error) {
smb_error(dgettext(TEXT_DOMAIN, "can't resolve %s"),
error, wins2);
return (error);
}
ctx->nb_wins2 = ina.s_addr;
}
return (0);
}
/*
* This is called by "smbutil lookup" to handle the
* "-w wins_server" option. Let the semantics of
* this option be: Use specified WINS server only.
* If specified server is the broadcast address,
* set broadcast mode (and no WINS servers).
*/
int
nb_ctx_setns(struct nb_ctx *ctx, const char *addr)
{
int error;
error = nb_ctx_setwins(ctx, addr, NULL);
if (error)
return (error);
/* Deal with explicit request for broadcast. */
if (ctx->nb_wins1 == INADDR_BROADCAST) {
ctx->nb_wins1 = 0;
ctx->nb_flags |= NBCF_BC_ENABLE;
}
return (0);
}
int
nb_ctx_setscope(struct nb_ctx *ctx, const char *scope)
{
size_t slen = strlen(scope);
if (slen >= 128) {
smb_error(dgettext(TEXT_DOMAIN,
"scope '%s' is too long"), 0, scope);
return (ENAMETOOLONG);
}
if (ctx->nb_scope)
free(ctx->nb_scope);
ctx->nb_scope = malloc(slen + 1);
if (ctx->nb_scope == NULL)
return (ENOMEM);
nls_str_upper(ctx->nb_scope, scope);
return (0);
}
/*
* Now get the WINS server IP addresses directly
* when reading the RC files, so no longer need to
* lookup any names here.
*/
int
nb_ctx_resolve(struct nb_ctx *ctx)
{
ctx->nb_flags |= NBCF_RESOLVED;
return (0);
}
/*
* used level values:
* 0 - default
* 1 - server
*
* All of these are normally system-wide settings;
* the checks are in rc_parse() in rcfile.c.
*/
int
nb_ctx_readrcsection(struct rcfile *rcfile, struct nb_ctx *ctx,
const char *sname, int level)
{
char *wins1, *wins2;
int error;
int nbns_enable;
int nbns_broadcast;
if (level > 1)
return (EINVAL);
/* External callers pass NULL to get the default. */
if (rcfile == NULL)
rcfile = smb_rc;
#ifdef NOT_DEFINED
rc_getint(rcfile, sname, "nbtimeout", &ctx->nb_timo);
rc_getstringptr(rcfile, sname, "nbscope", &p);
if (p)
nb_ctx_setscope(ctx, p);
#endif
/*
* Get "wins1", "wins2" config strings.
* Also support legacy "nbns".
*/
rc_getstringptr(rcfile, sname, "wins1", &wins1);
if (wins1 == NULL)
rc_getstringptr(rcfile, sname, "nbns", &wins1);
rc_getstringptr(rcfile, sname, "wins2", &wins2);
if (wins1 != NULL) {
error = nb_ctx_setwins(ctx, wins1, wins2);
if (error) {
smb_error(dgettext(TEXT_DOMAIN,
"invalid address specified in the section %s"),
0, sname);
return (error);
}
}
/*
* Want to use nb_ctx_setnbflags here, but
* have to get both boolean values first,
* either from settings or defaults.
*/
nbns_enable = nbns_broadcast = -1; /* not set */
rc_getbool(rcfile, sname, "nbns_enable", &nbns_enable);
rc_getbool(rcfile, sname, "nbns_broadcast", &nbns_broadcast);
if (nbns_enable >= 0 || nbns_broadcast >= 0) {
if (nbns_enable < 0)
nbns_enable = 1; /* default */
if (nbns_broadcast < 0)
nbns_broadcast = 1; /* default */
nb_ctx_setnbflags(ctx, nbns_enable, nbns_broadcast);
}
return (0);
}
#ifdef I18N /* never defined, permits xgettext(1) to pick out strings */
static const char *nb_err_rcode[] = {
gettext("bad request/response format"),
gettext("NBNS server failure"),
gettext("no such name"),
gettext("unsupported request"),
gettext("request rejected"),
gettext("name already registered)"
};
static const char *nb_err[] = {
gettext("host not found"),
gettext("too many redirects"),
gettext("invalid response"),
gettext("NETBIOS name too long"),
gettext("no interface to broadcast on and no NBNS server specified")
};
#else
static const char *nb_err_rcode[] = {
"bad request/response format",
"NBNS server failure",
"no such name",
"unsupported request",
"request rejected",
"name already registered"
};
static const char *nb_err[] = {
"host not found",
"too many redirects",
"invalid response",
"NETBIOS name too long",
"no interface to broadcast on and no NBNS server specified"
};
#endif
const char *
nb_strerror(int error)
{
if (error == 0)
return (NULL);
if (error <= NBERR_ACTIVE)
return (nb_err_rcode[error - 1]);
else if (error >= NBERR_HOSTNOTFOUND && error < NBERR_MAX)
return (nb_err[error - NBERR_HOSTNOTFOUND]);
else
return (NULL);
}