Import smbfs-1.4.1.

This is Boris Popov's SMB/CIFS file system implementation for FreeBSD.

Obtained from:	Boris Popov via ftp://ftp.butya.kz/pub/smbfs/

1 files changed, 773 insertions, 0 deletions

diff --git a/contrib/smbfs/lib/smb/ctx.c b/contrib/smbfs/lib/smb/ctx.c
new file mode 100644
index 0000000..6ecb190
--- /dev/null
+++ b/contrib/smbfs/lib/smb/ctx.c
@@ -0,0 +1,773 @@
+/*
+ * Copyright (c) 2000, 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: ctx.c,v 1.21 2001/04/06 15:47:14 bp Exp $
+ */
+#include <sys/param.h>
+#include <sys/sysctl.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <sys/mount.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <pwd.h>
+#include <grp.h>
+#include <unistd.h>
+#include <sys/iconv.h>
+
+#define NB_NEEDRESOLVER
+
+#include <netsmb/smb_lib.h>
+#include <netsmb/netbios.h>
+#include <netsmb/nb_lib.h>
+#include <netsmb/smb_conn.h>
+#include <cflib.h>
+
+/*
+ * Prescan command line for [-U user] argument
+ * and fill context with defaults
+ */
+int
+smb_ctx_init(struct smb_ctx *ctx, int argc, char *argv[],
+	int minlevel, int maxlevel, int sharetype)
+{
+	int  opt, error = 0;
+	const char *arg, *cp;
+
+	bzero(ctx,sizeof(*ctx));
+	error = nb_ctx_create(&ctx->ct_nb);
+	if (error)
+		return error;
+	ctx->ct_fd = -1;
+	ctx->ct_parsedlevel = SMBL_NONE;
+	ctx->ct_minlevel = minlevel;
+	ctx->ct_maxlevel = maxlevel;
+
+	ctx->ct_ssn.ioc_opt = SMBVOPT_CREATE;
+	ctx->ct_ssn.ioc_timeout = 15;
+	ctx->ct_ssn.ioc_retrycount = 4;
+	ctx->ct_ssn.ioc_owner = SMBM_ANY_OWNER;
+	ctx->ct_ssn.ioc_group = SMBM_ANY_GROUP;
+	ctx->ct_ssn.ioc_mode = SMBM_EXEC;
+	ctx->ct_ssn.ioc_rights = SMBM_DEFAULT;
+
+	ctx->ct_sh.ioc_opt = SMBVOPT_CREATE;
+	ctx->ct_sh.ioc_owner = SMBM_ANY_OWNER;
+	ctx->ct_sh.ioc_group = SMBM_ANY_GROUP;
+	ctx->ct_sh.ioc_mode = SMBM_EXEC;
+	ctx->ct_sh.ioc_rights = SMBM_DEFAULT;
+	ctx->ct_sh.ioc_owner = SMBM_ANY_OWNER;
+	ctx->ct_sh.ioc_group = SMBM_ANY_GROUP;
+
+	nb_ctx_setscope(ctx->ct_nb, "");
+	smb_ctx_setuser(ctx, getpwuid(geteuid())->pw_name);
+	endpwent();
+	if (argv == NULL)
+		return 0;
+	for (opt = 1; opt < argc; opt++) {
+		cp = argv[opt];
+		if (strncmp(cp, "//", 2) != 0)
+			continue;
+		error = smb_ctx_parseunc(ctx, cp, sharetype, (const char**)&cp);
+		if (error)
+			return error;
+		ctx->ct_uncnext = cp;
+		break;
+	}
+	while (error == 0 && (opt = cf_getopt(argc, argv, ":E:L:U:")) != -1) {
+		arg = cf_optarg;
+		switch (opt) {
+		    case 'E':
+			error = smb_ctx_setcharset(ctx, arg);
+			if (error)
+				return error;
+			break;
+		    case 'L':
+			error = nls_setlocale(optarg);
+			if (error)
+				break;
+			break;
+		    case 'U':
+			error = smb_ctx_setuser(ctx, arg);
+			break;
+		}
+	}
+	cf_optind = cf_optreset = 1;
+	return error;
+}
+
+void
+smb_ctx_done(struct smb_ctx *ctx)
+{
+	if (ctx->ct_ssn.ioc_server)
+		nb_snbfree(ctx->ct_ssn.ioc_server);
+	if (ctx->ct_ssn.ioc_local)
+		nb_snbfree(ctx->ct_ssn.ioc_local);
+	if (ctx->ct_srvaddr)
+		free(ctx->ct_srvaddr);
+	if (ctx->ct_nb)
+		nb_ctx_done(ctx->ct_nb);
+}
+
+static int
+getsubstring(const char *p, u_char sep, char *dest, int maxlen, const char **next)
+{
+	int len;
+
+	maxlen--;
+	for (len = 0; len < maxlen && *p != sep; p++, len++, dest++) {
+		if (*p == 0)
+			return EINVAL;
+		*dest = *p;
+	}
+	*dest = 0;
+	*next = *p ? p + 1 : p;
+	return 0;
+}
+
+/*
+ * Here we expect something like "[proto:]//[user@]host[/share][/path]"
+ */
+int
+smb_ctx_parseunc(struct smb_ctx *ctx, const char *unc, int sharetype,
+	const char **next)
+{
+	const char *p = unc;
+	char *p1;
+	char tmp[1024];
+	int error ;
+
+	ctx->ct_parsedlevel = SMBL_NONE;
+	if (*p++ != '/' || *p++ != '/') {
+		smb_error("UNC should start with '//'", 0);
+		return EINVAL;
+	}
+	p1 = tmp;
+	error = getsubstring(p, '@', p1, sizeof(tmp), &p);
+	if (!error) {
+		if (ctx->ct_maxlevel < SMBL_VC) {
+			smb_error("no user name required", 0);
+			return EINVAL;
+		}
+		if (*p1 == 0) {
+			smb_error("empty user name", 0);
+			return EINVAL;
+		}
+		error = smb_ctx_setuser(ctx, tmp);
+		if (error)
+			return error;
+		ctx->ct_parsedlevel = SMBL_VC;
+	}
+	error = getsubstring(p, '/', p1, sizeof(tmp), &p);
+	if (error) {
+		error = getsubstring(p, '\0', p1, sizeof(tmp), &p);
+		if (error) {
+			smb_error("no server name found", 0);
+			return error;
+		}
+	}
+	if (*p1 == 0) {
+		smb_error("empty server name", 0);
+		return EINVAL;
+	}
+	error = smb_ctx_setserver(ctx, tmp);
+	if (error)
+		return error;
+	if (sharetype == SMB_ST_NONE) {
+		*next = p;
+		return 0;
+	}
+	if (*p != 0 && ctx->ct_maxlevel < SMBL_SHARE) {
+		smb_error("no share name required", 0);
+		return EINVAL;
+	}
+	error = getsubstring(p, '/', p1, sizeof(tmp), &p);
+	if (error) {
+		error = getsubstring(p, '\0', p1, sizeof(tmp), &p);
+		if (error) {
+			smb_error("unexpected end of line", 0);
+			return error;
+		}
+	}
+	if (*p1 == 0 && ctx->ct_minlevel >= SMBL_SHARE) {
+		smb_error("empty share name", 0);
+		return EINVAL;
+	}
+	*next = p;
+	if (*p1 == 0)
+		return 0;
+	error = smb_ctx_setshare(ctx, p1, sharetype);
+	return error;
+}
+
+int
+smb_ctx_setcharset(struct smb_ctx *ctx, const char *arg)
+{
+	char *cp, *servercs, *localcs;
+	int cslen = sizeof(ctx->ct_ssn.ioc_localcs);
+	int scslen, lcslen, error;
+
+	cp = strchr(arg, ':');
+	lcslen = cp ? (cp - arg) : 0;
+	if (lcslen == 0 || lcslen >= cslen) {
+		smb_error("invalid local charset specification (%s)", 0, arg);
+		return EINVAL;
+	}
+	scslen = (size_t)strlen(++cp);
+	if (scslen == 0 || scslen >= cslen) {
+		smb_error("invalid server charset specification (%s)", 0, arg);
+		return EINVAL;
+	}
+	localcs = memcpy(ctx->ct_ssn.ioc_localcs, arg, lcslen);
+	localcs[lcslen] = 0;
+	servercs = strcpy(ctx->ct_ssn.ioc_servercs, cp);
+	error = nls_setrecode(localcs, servercs);
+	if (error == 0)
+		return 0;
+	smb_error("can't initialize iconv support (%s:%s)",
+	    error, localcs, servercs);
+	localcs[0] = 0;
+	servercs[0] = 0;
+	return error;
+}
+
+int
+smb_ctx_setserver(struct smb_ctx *ctx, const char *name)
+{
+	if (strlen(name) >= SMB_MAXSRVNAMELEN) {
+		smb_error("server name '%s' too long", 0, name);
+		return ENAMETOOLONG;
+	}
+	nls_str_upper(ctx->ct_ssn.ioc_srvname, name);
+	return 0;
+}
+
+int
+smb_ctx_setuser(struct smb_ctx *ctx, const char *name)
+{
+	if (strlen(name) >= SMB_MAXUSERNAMELEN) {
+		smb_error("user name '%s' too long", 0, name);
+		return ENAMETOOLONG;
+	}
+	nls_str_upper(ctx->ct_ssn.ioc_user, name);
+	return 0;
+}
+
+int
+smb_ctx_setworkgroup(struct smb_ctx *ctx, const char *name)
+{
+	if (strlen(name) >= SMB_MAXUSERNAMELEN) {
+		smb_error("workgroup name '%s' too long", 0, name);
+		return ENAMETOOLONG;
+	}
+	nls_str_upper(ctx->ct_ssn.ioc_workgroup, name);
+	return 0;
+}
+
+int
+smb_ctx_setpassword(struct smb_ctx *ctx, const char *passwd)
+{
+	if (passwd == NULL)
+		return EINVAL;
+	if (strlen(passwd) >= SMB_MAXPASSWORDLEN) {
+		smb_error("password too long", 0);
+		return ENAMETOOLONG;
+	}
+	if (strncmp(passwd, "$$1", 3) == 0)
+		smb_simpledecrypt(ctx->ct_ssn.ioc_password, passwd);
+	else
+		strcpy(ctx->ct_ssn.ioc_password, passwd);
+	strcpy(ctx->ct_sh.ioc_password, ctx->ct_ssn.ioc_password);
+	return 0;
+}
+
+int
+smb_ctx_setshare(struct smb_ctx *ctx, const char *share, int stype)
+{
+	if (strlen(share) >= SMB_MAXSHARENAMELEN) {
+		smb_error("share name '%s' too long", 0, share);
+		return ENAMETOOLONG;
+	}
+	nls_str_upper(ctx->ct_sh.ioc_share, share);
+	if (share[0] != 0)
+		ctx->ct_parsedlevel = SMBL_SHARE;
+	ctx->ct_sh.ioc_stype = stype;
+	return 0;
+}
+
+int
+smb_ctx_setsrvaddr(struct smb_ctx *ctx, const char *addr)
+{
+	if (addr == NULL || addr[0] == 0)
+		return EINVAL;
+	if (ctx->ct_srvaddr)
+		free(ctx->ct_srvaddr);
+	if ((ctx->ct_srvaddr = strdup(addr)) == NULL)
+		return ENOMEM;
+	return 0;
+}
+
+static int
+smb_parse_owner(char *pair, uid_t *uid, gid_t *gid)
+{
+	struct group *gr;
+	struct passwd *pw;
+	char *cp;
+
+	cp = strchr(pair, ':');
+	if (cp) {
+		*cp++ = '\0';
+		if (*cp) {
+			gr = getgrnam(cp);
+			if (gr) {
+				*gid = gr->gr_gid;
+			} else
+				smb_error("Invalid group name %s, ignored",
+				    0, cp);
+		}
+	}
+	if (*pair) {
+		pw = getpwnam(pair);
+		if (pw) {
+			*uid = pw->pw_uid;
+		} else
+			smb_error("Invalid user name %s, ignored", 0, pair);
+	}
+	endpwent();
+	return 0;
+}
+
+int
+smb_ctx_opt(struct smb_ctx *ctx, int opt, const char *arg)
+{
+	int error = 0;
+	char *p, *cp;
+
+	switch(opt) {
+	    case 'U':
+		break;
+	    case 'I':
+		error = smb_ctx_setsrvaddr(ctx, arg);
+		break;
+	    case 'M':
+		ctx->ct_ssn.ioc_rights = strtol(arg, &cp, 8);
+		if (*cp == '/') {
+			ctx->ct_sh.ioc_rights = strtol(cp + 1, &cp, 8);
+			ctx->ct_flags |= SMBCF_SRIGHTS;
+		}
+		break;
+	    case 'N':
+		ctx->ct_flags |= SMBCF_NOPWD;
+		break;
+	    case 'O':
+		p = strdup(arg);
+		cp = strchr(p, '/');
+		if (cp) {
+			*cp++ = '\0';
+			error = smb_parse_owner(cp, &ctx->ct_sh.ioc_owner,
+			    &ctx->ct_sh.ioc_group);
+		}
+		if (*p && error == 0) {
+			error = smb_parse_owner(cp, &ctx->ct_ssn.ioc_owner,
+			    &ctx->ct_ssn.ioc_group);
+		}
+		free(p);
+		break;
+	    case 'P':
+/*		ctx->ct_ssn.ioc_opt |= SMBCOPT_PERMANENT;*/
+		break;
+	    case 'R':
+		ctx->ct_ssn.ioc_retrycount = atoi(arg);
+		break;
+	    case 'T':
+		ctx->ct_ssn.ioc_timeout = atoi(arg);
+		break;
+	    case 'W':
+		error = smb_ctx_setworkgroup(ctx, arg);
+		break;
+	}
+	return error;
+}
+
+#if 0
+static void
+smb_hexdump(const u_char *buf, int len) {
+	int ofs = 0;
+
+	while (len--) {
+		if (ofs % 16 == 0)
+			printf("\n%02X: ", ofs);
+		printf("%02x ", *buf++);
+		ofs++;
+	}
+	printf("\n");
+}
+#endif
+
+
+static int
+smb_addiconvtbl(const char *to, const char *from, const u_char *tbl)
+{
+	int error;
+
+	error = kiconv_add_xlat_table(to, from, tbl);
+	if (error && error != EEXIST) {
+		smb_error("can not setup kernel iconv table (%s:%s)", error,
+		    from, to);
+		return error;
+	}
+	return 0;
+}
+
+/*
+ * Verify context before connect operation(s),
+ * lookup specified server and try to fill all forgotten fields.
+ */
+int
+smb_ctx_resolve(struct smb_ctx *ctx)
+{
+	struct smbioc_ossn *ssn = &ctx->ct_ssn;
+	struct smbioc_oshare *sh = &ctx->ct_sh;
+	struct nb_name nn;
+	struct sockaddr *sap;
+	struct sockaddr_nb *salocal, *saserver;
+	char *cp;
+	u_char cstbl[256];
+	u_int i;
+	int error = 0;
+	
+	ctx->ct_flags &= ~SMBCF_RESOLVED;
+	if (ssn->ioc_srvname[0] == 0) {
+		smb_error("no server name specified", 0);
+		return EINVAL;
+	}
+	if (ssn->ioc_user[0] == 0) {
+		smb_error("no user name specified for server %s",
+		    0, ssn->ioc_srvname);
+		return EINVAL;
+	}
+	if (ctx->ct_minlevel >= SMBL_SHARE && sh->ioc_share[0] == 0) {
+		smb_error("no share name specified for %s@%s",
+		    0, ssn->ioc_user, ssn->ioc_srvname);
+		return EINVAL;
+	}
+	error = nb_ctx_resolve(ctx->ct_nb);
+	if (error)
+		return error;
+	if (ssn->ioc_localcs[0] == 0)
+		strcpy(ssn->ioc_localcs, "default");	/* XXX: locale name ? */
+	error = smb_addiconvtbl("tolower", ssn->ioc_localcs, nls_lower);
+	if (error)
+		return error;
+	error = smb_addiconvtbl("toupper", ssn->ioc_localcs, nls_upper);
+	if (error)
+		return error;
+	if (ssn->ioc_servercs[0] != 0) {
+		for(i = 0; i < sizeof(cstbl); i++)
+			cstbl[i] = i;
+		nls_mem_toext(cstbl, cstbl, sizeof(cstbl));
+		error = smb_addiconvtbl(ssn->ioc_servercs, ssn->ioc_localcs, cstbl);
+		if (error)
+			return error;
+		for(i = 0; i < sizeof(cstbl); i++)
+			cstbl[i] = i;
+		nls_mem_toloc(cstbl, cstbl, sizeof(cstbl));
+		error = smb_addiconvtbl(ssn->ioc_localcs, ssn->ioc_servercs, cstbl);
+		if (error)
+			return error;
+	}
+	if (ctx->ct_srvaddr) {
+		error = nb_resolvehost_in(ctx->ct_srvaddr, &sap);
+	} else {
+		error = nbns_resolvename(ssn->ioc_srvname, ctx->ct_nb, &sap);
+	}
+	if (error) {
+		smb_error("can't get server address", error);
+		return error;
+	}
+	nn.nn_scope = ctx->ct_nb->nb_scope;
+	nn.nn_type = NBT_SERVER;
+	strcpy(nn.nn_name, ssn->ioc_srvname);
+	error = nb_sockaddr(sap, &nn, &saserver);
+	nb_snbfree(sap);
+	if (error) {
+		smb_error("can't allocate server address", error);
+		return error;
+	}
+	ssn->ioc_server = (struct sockaddr*)saserver;
+	if (ctx->ct_locname[0] == 0) {
+		error = nb_getlocalname(ctx->ct_locname);
+		if (error) {
+			smb_error("can't get local name", error);
+			return error;
+		}
+		nls_str_upper(ctx->ct_locname, ctx->ct_locname);
+	}
+	strcpy(nn.nn_name, ctx->ct_locname);
+	nn.nn_type = NBT_WKSTA;
+	nn.nn_scope = ctx->ct_nb->nb_scope;
+	error = nb_sockaddr(NULL, &nn, &salocal);
+	if (error) {
+		nb_snbfree((struct sockaddr*)saserver);
+		smb_error("can't allocate local address", error);
+		return error;
+	}
+	ssn->ioc_local = (struct sockaddr*)salocal;
+	ssn->ioc_lolen = salocal->snb_len;
+	ssn->ioc_svlen = saserver->snb_len;
+	if (ssn->ioc_password[0] == 0 && (ctx->ct_flags & SMBCF_NOPWD) == 0) {
+		cp = getpass("Password:");
+		error = smb_ctx_setpassword(ctx, cp);
+		if (error)
+			return error;
+	}
+	ctx->ct_flags |= SMBCF_RESOLVED;
+	return 0;
+}
+
+static int
+smb_ctx_gethandle(struct smb_ctx *ctx)
+{
+	int fd, i;
+	char buf[20];
+
+	/*
+	 * First try to open as clone
+	 */
+	fd = open("/dev/"NSMB_NAME, O_RDWR);
+	if (fd >= 0) {
+		ctx->ct_fd = fd;
+		return 0;
+	}
+	/*
+	 * well, no clone capabilities available - we have to scan
+	 * all devices in order to get free one
+	 */
+	 for (i = 0; i < 1024; i++) {
+	         snprintf(buf, sizeof(buf), "/dev/%s%d", NSMB_NAME, i);
+		 fd = open(buf, O_RDWR);
+		 if (fd >= 0) {
+			ctx->ct_fd = fd;
+			return 0;
+		 }
+	 }
+	 /*
+	  * This is a compatibility with old /dev/net/nsmb device
+	  */
+	 for (i = 0; i < 1024; i++) {
+	         snprintf(buf, sizeof(buf), "/dev/net/%s%d", NSMB_NAME, i);
+		 fd = open(buf, O_RDWR);
+		 if (fd >= 0) {
+			ctx->ct_fd = fd;
+			return 0;
+		 }
+		 if (errno == ENOENT)
+		         return ENOENT;
+	 }
+	 return ENOENT;
+}
+
+int
+smb_ctx_lookup(struct smb_ctx *ctx, int level, int flags)
+{
+	struct smbioc_lookup rq;
+	int error;
+
+	if ((ctx->ct_flags & SMBCF_RESOLVED) == 0) {
+		smb_error("smb_ctx_lookup() data is not resolved", 0);
+		return EINVAL;
+	}
+	if (ctx->ct_fd != -1) {
+		close(ctx->ct_fd);
+		ctx->ct_fd = -1;
+	}
+	error = smb_ctx_gethandle(ctx);
+	if (error) {
+		smb_error("can't get handle to requester (no /dev/net/nsmb* device)", 0);
+		return EINVAL;
+	}
+	bzero(&rq, sizeof(rq));
+	bcopy(&ctx->ct_ssn, &rq.ioc_ssn, sizeof(struct smbioc_ossn));
+	bcopy(&ctx->ct_sh, &rq.ioc_sh, sizeof(struct smbioc_oshare));
+	rq.ioc_flags = flags;
+	rq.ioc_level = level;
+	if (ioctl(ctx->ct_fd, SMBIOC_LOOKUP, &rq) == -1) {
+		error = errno;
+		if (flags & SMBLK_CREATE)
+			smb_error("unable to open connection", error);
+		return error;
+	}
+	return 0;
+}
+
+int
+smb_ctx_login(struct smb_ctx *ctx)
+{
+	struct smbioc_ossn *ssn = &ctx->ct_ssn;
+	struct smbioc_oshare *sh = &ctx->ct_sh;
+	int error;
+
+	if ((ctx->ct_flags & SMBCF_RESOLVED) == 0) {
+		smb_error("smb_ctx_resolve() should be called first", 0);
+		return EINVAL;
+	}
+	if (ctx->ct_fd != -1) {
+		close(ctx->ct_fd);
+		ctx->ct_fd = -1;
+	}
+	error = smb_ctx_gethandle(ctx);
+	if (error) {
+		smb_error("can't get handle to requester", 0);
+		return EINVAL;
+	}
+	if (ioctl(ctx->ct_fd, SMBIOC_OPENSESSION, ssn) == -1) {
+		error = errno;
+		smb_error("can't open session to server %s", error, ssn->ioc_srvname);
+		return error;
+	}
+	if (sh->ioc_share[0] == 0)
+		return 0;
+	if (ioctl(ctx->ct_fd, SMBIOC_OPENSHARE, sh) == -1) {
+		error = errno;
+		smb_error("can't connect to share //%s/%s", error,
+		    ssn->ioc_srvname, sh->ioc_share);
+		return error;
+	}
+	return 0;
+}
+
+int
+smb_ctx_setflags(struct smb_ctx *ctx, int level, int mask, int flags)
+{
+	struct smbioc_flags fl;
+
+	if (ctx->ct_fd == -1)
+		return EINVAL;
+	fl.ioc_level = level;
+	fl.ioc_mask = mask;
+	fl.ioc_flags = flags;
+	if (ioctl(ctx->ct_fd, SMBIOC_SETFLAGS, &fl) == -1)
+		return errno;
+	return 0;
+}
+
+/*
+ * level values:
+ * 0 - default
+ * 1 - server
+ * 2 - server:user
+ * 3 - server:user:share
+ */
+static int
+smb_ctx_readrcsection(struct smb_ctx *ctx, const char *sname, int level)
+{
+	char *p;
+	int error;
+
+	if (level > 0) {
+		rc_getstringptr(smb_rc, sname, "charsets", &p);
+		if (p) {
+			error = smb_ctx_setcharset(ctx, p);
+			if (error)
+				smb_error("charset specification in the section '%s' ignored", error, sname);
+		}
+	}
+	if (level <= 1) {
+		rc_getint(smb_rc, sname, "timeout", &ctx->ct_ssn.ioc_timeout);
+		rc_getint(smb_rc, sname, "retry_count", &ctx->ct_ssn.ioc_retrycount);
+	}
+	if (level == 1) {
+		rc_getstringptr(smb_rc, sname, "addr", &p);
+		if (p) {
+			error = smb_ctx_setsrvaddr(ctx, p);
+			if (error) {
+				smb_error("invalid address specified in the section %s", 0, sname);
+				return error;
+			}
+		}
+	}
+	if (level >= 2) {
+		rc_getstringptr(smb_rc, sname, "password", &p);
+		if (p)
+			smb_ctx_setpassword(ctx, p);
+	}
+	rc_getstringptr(smb_rc, sname, "workgroup", &p);
+	if (p)
+		smb_ctx_setworkgroup(ctx, p);
+	return 0;
+}
+
+/*
+ * read rc file as follows:
+ * 1. read [default] section
+ * 2. override with [server] section
+ * 3. override with [server:user:share] section
+ * Since abcence of rcfile is not fatal, silently ignore this fact.
+ * smb_rc file should be closed by caller.
+ */
+int
+smb_ctx_readrc(struct smb_ctx *ctx)
+{
+	char sname[SMB_MAXSRVNAMELEN + SMB_MAXUSERNAMELEN + SMB_MAXSHARENAMELEN + 4];
+/*	char *p;*/
+
+	if (smb_open_rcfile() != 0)
+		return 0;
+
+	if (ctx->ct_ssn.ioc_user[0] == 0 || ctx->ct_ssn.ioc_srvname[0] == 0)
+		return 0;
+
+	smb_ctx_readrcsection(ctx, "default", 0);
+	nb_ctx_readrcsection(smb_rc, ctx->ct_nb, "default", 0);
+	smb_ctx_readrcsection(ctx, ctx->ct_ssn.ioc_srvname, 1);
+	nb_ctx_readrcsection(smb_rc, ctx->ct_nb, ctx->ct_ssn.ioc_srvname, 1);
+	/*
+	 * SERVER:USER parameters
+	 */
+	snprintf(sname, sizeof(sname), "%s:%s", ctx->ct_ssn.ioc_srvname,
+	    ctx->ct_ssn.ioc_user);
+	smb_ctx_readrcsection(ctx, sname, 2);
+
+	if (ctx->ct_sh.ioc_share[0] != 0) {
+		/*
+		 * SERVER:USER:SHARE parameters
+	         */
+		snprintf(sname, sizeof(sname), "%s:%s:%s", ctx->ct_ssn.ioc_srvname,
+		    ctx->ct_ssn.ioc_user, ctx->ct_sh.ioc_share);
+		smb_ctx_readrcsection(ctx, sname, 3);
+	}
+	return 0;
+}
+