smbd/msdfs.c

ソースコードを見る。

関数
static NTSTATUS	parse_dfs_path (connection_struct *conn, const char *pathname, BOOL allow_wcards, struct dfs_path *pdp, BOOL *ppath_contains_wcard)
static NTSTATUS	create_conn_struct (connection_struct *conn, int snum, const char *path)
static BOOL	parse_msdfs_symlink (TALLOC_CTX *ctx, char *target, struct referral **preflist, int *refcount)
BOOL	is_msdfs_link (connection_struct *conn, const char *path, pstring link_target, SMB_STRUCT_STAT *sbufp)
static NTSTATUS	dfs_path_lookup (connection_struct *conn, const char *dfspath, const struct dfs_path *pdp, BOOL search_flag, int *consumedcntp, pstring targetpath)
static NTSTATUS	dfs_redirect (connection_struct *conn, pstring dfs_path, BOOL search_wcard_flag, BOOL *ppath_contains_wcard)
static NTSTATUS	self_ref (TALLOC_CTX *ctx, const char *dfs_path, struct junction_map *jucn, int *consumedcntp, BOOL *self_referralp)
NTSTATUS	get_referred_path (TALLOC_CTX *ctx, const char *dfs_path, struct junction_map *jucn, int *consumedcntp, BOOL *self_referralp)
static int	setup_ver2_dfs_referral (const char *pathname, char **ppdata, struct junction_map *junction, int consumedcnt, BOOL self_referral)
static int	setup_ver3_dfs_referral (const char *pathname, char **ppdata, struct junction_map *junction, int consumedcnt, BOOL self_referral)
int	setup_dfs_referral (connection_struct *orig_conn, const char *dfs_path, int max_referral_level, char **ppdata, NTSTATUS *pstatus)
BOOL	create_junction (const char *dfs_path, struct junction_map *jucn)
static BOOL	junction_to_local_path (struct junction_map *jucn, char *path, int max_pathlen, connection_struct *conn_out)
BOOL	create_msdfs_link (struct junction_map *jucn, BOOL exists)
BOOL	remove_msdfs_link (struct junction_map *jucn)
static int	form_junctions (TALLOC_CTX *ctx, int snum, struct junction_map *jucn, int jn_remain)
int	enum_msdfs_links (TALLOC_CTX *ctx, struct junction_map *jucn, int jn_max)
NTSTATUS	resolve_dfspath (connection_struct *conn, BOOL dfs_pathnames, pstring name)
NTSTATUS	resolve_dfspath_wcard (connection_struct *conn, BOOL dfs_pathnames, pstring name, BOOL *ppath_contains_wcard)
変数
uint32	global_client_caps

---

関数

static NTSTATUS parse_dfs_path	(	connection_struct *	conn,
		const char *	pathname,
		BOOL	allow_wcards,
		struct dfs_path *	pdp,
		BOOL *	ppath_contains_wcard
	)			[static]

msdfs.c の 46 行で定義されています。

参照先 check_path_syntax()・check_path_syntax_posix()・check_path_syntax_wcard()・get_current_username()・dfs_path::hostname・nt_errstr()・dfs_path::posix_path・dfs_path::reqpath・dfs_path::servicename・status・strchr_m()・strequal()・trim_char().

参照元 create_junction()・dfs_redirect()・get_referred_path().

{
        pstring pathname_local;
        char *p,*temp, *servicename;
        NTSTATUS status = NT_STATUS_OK;
        char sepchar;

        ZERO_STRUCTP(pdp);

        pstrcpy(pathname_local,pathname);
        p = temp = pathname_local;

        pdp->posix_path = (lp_posix_pathnames() && *pathname == '/');

        sepchar = pdp->posix_path ? '/' : '\\';

        if (*pathname != sepchar) {
                DEBUG(10,("parse_dfs_path: path %s doesn't start with %c\n",
                        pathname, sepchar ));
                /*
                 * Possibly client sent a local path by mistake.
                 * Try and convert to a local path.
                 */

                pdp->hostname[0] = '\0';
                pdp->servicename[0] = '\0';

                /* We've got no info about separators. */
                pdp->posix_path = lp_posix_pathnames();
                p = temp;
                DEBUG(10,("parse_dfs_path: trying to convert %s to a local path\n",
                        temp));
                goto local_path;
        }

        trim_char(temp,sepchar,sepchar);

        DEBUG(10,("parse_dfs_path: temp = |%s| after trimming %c's\n",
                temp, sepchar));

        /* Now tokenize. */
        /* Parse out hostname. */
        p = strchr_m(temp,sepchar);
        if(p == NULL) {
                DEBUG(10,("parse_dfs_path: can't parse hostname from path %s\n",
                        temp));
                /*
                 * Possibly client sent a local path by mistake.
                 * Try and convert to a local path.
                 */

                pdp->hostname[0] = '\0';
                pdp->servicename[0] = '\0';

                p = temp;
                DEBUG(10,("parse_dfs_path: trying to convert %s to a local path\n",
                        temp));
                goto local_path;
        }
        *p = '\0';
        fstrcpy(pdp->hostname,temp);
        DEBUG(10,("parse_dfs_path: hostname: %s\n",pdp->hostname));

        /* Parse out servicename. */
        servicename = p+1;
        p = strchr_m(servicename,sepchar);
        if (p) {
                *p = '\0';
        }

        /* Is this really our servicename ? */
        if (conn && !( strequal(servicename, lp_servicename(SNUM(conn)))
                        || (strequal(servicename, HOMES_NAME)
                        && strequal(lp_servicename(SNUM(conn)),
                                get_current_username()) )) ) {

                DEBUG(10,("parse_dfs_path: %s is not our servicename\n",
                        servicename));

                /*
                 * Possibly client sent a local path by mistake.
                 * Try and convert to a local path.
                 */

                pdp->hostname[0] = '\0';
                pdp->servicename[0] = '\0';

                /* Repair the path - replace the sepchar's
                   we nulled out */
                servicename--;
                *servicename = sepchar;
                if (p) {
                        *p = sepchar;
                }

                p = temp;
                DEBUG(10,("parse_dfs_path: trying to convert %s "
                        "to a local path\n",
                        temp));
                goto local_path;
        }

        fstrcpy(pdp->servicename,servicename);

        DEBUG(10,("parse_dfs_path: servicename: %s\n",pdp->servicename));

        if(p == NULL) {
                pdp->reqpath[0] = '\0';
                return NT_STATUS_OK;
        }
        p++;

  local_path:

        *ppath_contains_wcard = False;

        /* Rest is reqpath. */
        if (pdp->posix_path) {
                status = check_path_syntax_posix(pdp->reqpath, p);
        } else {
                if (allow_wcards) {
                        status = check_path_syntax_wcard(pdp->reqpath, p, ppath_contains_wcard);
                } else {
                        status = check_path_syntax(pdp->reqpath, p);
                }
        }

        if (!NT_STATUS_IS_OK(status)) {
                DEBUG(10,("parse_dfs_path: '%s' failed with %s\n",
                        p, nt_errstr(status) ));
                return status;
        }

        DEBUG(10,("parse_dfs_path: rest of the path: %s\n",pdp->reqpath));
        return NT_STATUS_OK;
}

static NTSTATUS create_conn_struct	(	connection_struct *	conn,
		int	snum,
		const char *	path
	)			[static]

msdfs.c の 192 行で定義されています。

参照先 conn_free_internal()・connection_struct::connectpath・errno・map_nt_error_from_unix()・connection_struct::mem_ctx・connection_struct::params・pstring_sub()・share_params::service・set_conn_connectpath()・smbd_vfs_init()・status・strerror()・talloc_init()・vfs_ChDir().

参照元 form_junctions()・get_referred_path()・junction_to_local_path().

{
        pstring connpath;

        ZERO_STRUCTP(conn);

        pstrcpy(connpath, path);
        pstring_sub(connpath , "%S", lp_servicename(snum));

        /* needed for smbd_vfs_init() */

        if ((conn->mem_ctx=talloc_init("connection_struct")) == NULL) {
                DEBUG(0,("talloc_init(connection_struct) failed!\n"));
                return NT_STATUS_NO_MEMORY;
        }

        if (!(conn->params = TALLOC_ZERO_P(conn->mem_ctx, struct share_params))) {
                DEBUG(0, ("TALLOC failed\n"));
                return NT_STATUS_NO_MEMORY;
        }

        conn->params->service = snum;

        set_conn_connectpath(conn, connpath);

        if (!smbd_vfs_init(conn)) {
                NTSTATUS status = map_nt_error_from_unix(errno);
                DEBUG(0,("create_conn_struct: smbd_vfs_init failed.\n"));
                conn_free_internal(conn);
                return status;
        }

        /*
         * Windows seems to insist on doing trans2getdfsreferral() calls on the IPC$
         * share as the anonymous user. If we try to chdir as that user we will
         * fail.... WTF ? JRA.
         */

        if (vfs_ChDir(conn,conn->connectpath) != 0) {
                NTSTATUS status = map_nt_error_from_unix(errno);
                DEBUG(3,("create_conn_struct: Can't ChDir to new conn path %s. Error was %s\n",
                                        conn->connectpath, strerror(errno) ));
                conn_free_internal(conn);
                return status;
        }

        return NT_STATUS_OK;
}

static BOOL parse_msdfs_symlink	(	TALLOC_CTX *	ctx,
		char *	target,
		struct referral **	preflist,
		int *	refcount
	)			[static]

msdfs.c の 260 行で定義されています。

参照先 referral::alternate_path・prot・referral::proximity・string_replace()・referral::ttl.

参照元 form_junctions()・get_referred_path().

{
        pstring temp;
        char *prot;
        char *alt_path[MAX_REFERRAL_COUNT];
        int count = 0, i;
        struct referral *reflist;

        pstrcpy(temp,target);
        prot = strtok(temp,":");
        if (!prot) {
                DEBUG(0,("parse_msdfs_symlink: invalid path !\n"));
                return False;
        }

        /* parse out the alternate paths */
        while((count<MAX_REFERRAL_COUNT) &&
              ((alt_path[count] = strtok(NULL,",")) != NULL)) {
                count++;
        }

        DEBUG(10,("parse_msdfs_symlink: count=%d\n", count));

        if (count) {
                reflist = *preflist = TALLOC_ZERO_ARRAY(ctx, struct referral, count);
                if(reflist == NULL) {
                        DEBUG(0,("parse_msdfs_symlink: talloc failed!\n"));
                        return False;
                }
        } else {
                reflist = *preflist = NULL;
        }
        
        for(i=0;i<count;i++) {
                char *p;

                /* Canonicalize link target. Replace all /'s in the path by a \ */
                string_replace(alt_path[i], '/', '\\');

                /* Remove leading '\\'s */
                p = alt_path[i];
                while (*p && (*p == '\\')) {
                        p++;
                }

                pstrcpy(reflist[i].alternate_path, "\\");
                pstrcat(reflist[i].alternate_path, p);

                reflist[i].proximity = 0;
                reflist[i].ttl = REFERRAL_TTL;
                DEBUG(10, ("parse_msdfs_symlink: Created alt path: %s\n", reflist[i].alternate_path));
                *refcount += 1;
        }

        return True;
}

BOOL is_msdfs_link	(	connection_struct *	conn,
		const char *	path,
		pstring	link_target,
		SMB_STRUCT_STAT *	sbufp
	)

msdfs.c の 325 行で定義されています。

参照先 errno・strerror()・strnequal().

参照元 dfs_path_lookup()・form_junctions()・get_lanman2_dir_entry()・is_visible_file().

{
        SMB_STRUCT_STAT st;
        int referral_len = 0;

        if (sbufp == NULL) {
                sbufp = &st;
        }

        if (SMB_VFS_LSTAT(conn, path, sbufp) != 0) {
                DEBUG(5,("is_msdfs_link: %s does not exist.\n",path));
                return False;
        }
  
        if (!S_ISLNK(sbufp->st_mode)) {
                DEBUG(5,("is_msdfs_link: %s is not a link.\n",path));
                return False;
        }

        /* open the link and read it */
        referral_len = SMB_VFS_READLINK(conn, path, link_target, sizeof(pstring)-1);
        if (referral_len == -1) {
                DEBUG(0,("is_msdfs_link: Error reading msdfs link %s: %s\n",
                        path, strerror(errno)));
                return False;
        }
        link_target[referral_len] = '\0';

        DEBUG(5,("is_msdfs_link: %s -> %s\n",path, link_target));

        if (!strnequal(link_target, "msdfs:", 6)) {
                return False;
        }
        return True;
}

static NTSTATUS dfs_path_lookup	(	connection_struct *	conn,
		const char *	dfspath,
		const struct dfs_path *	pdp,
		BOOL	search_flag,
		int *	consumedcntp,
		pstring	targetpath
	)			[static]

msdfs.c の 379 行で定義されています。

参照先 connection_struct::connectpath・is_msdfs_link()・dfs_path::posix_path・dfs_path::reqpath・status・string_replace()・strrchr_m()・trim_char()・unix_convert().

参照元 dfs_redirect()・get_referred_path().

{
        char *p = NULL;
        char *q = NULL;
        SMB_STRUCT_STAT sbuf;
        NTSTATUS status;
        pstring localpath;
        pstring canon_dfspath; /* Canonicalized dfs path. (only '/' components). */

        DEBUG(10,("dfs_path_lookup: Conn path = %s reqpath = %s\n",
                conn->connectpath, pdp->reqpath));

        /* 
         * Note the unix path conversion here we're doing we can
         * throw away. We're looking for a symlink for a dfs
         * resolution, if we don't find it we'll do another
         * unix_convert later in the codepath.
         * If we needed to remember what we'd resolved in
         * dp->reqpath (as the original code did) we'd
         * pstrcpy(localhost, dp->reqpath) on any code
         * path below that returns True - but I don't
         * think this is needed. JRA.
         */

        pstrcpy(localpath, pdp->reqpath);
        status = unix_convert(conn, localpath, search_flag, NULL, &sbuf);
        if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status,
                                        NT_STATUS_OBJECT_PATH_NOT_FOUND)) {
                return status;
        }

        /* Optimization - check if we can redirect the whole path. */

        if (is_msdfs_link(conn, localpath, targetpath, NULL)) {
                if (search_flag) {
                        DEBUG(6,("dfs_path_lookup (FindFirst) No redirection "
                                 "for dfs link %s.\n", dfspath));
                        return NT_STATUS_OK;
                }

                DEBUG(6,("dfs_path_lookup: %s resolves to a "
                        "valid dfs link %s.\n", dfspath, targetpath));

                if (consumedcntp) {
                        *consumedcntp = strlen(dfspath);
                }
                return NT_STATUS_PATH_NOT_COVERED;
        }

        /* Prepare to test only for '/' components in the given path,
         * so if a Windows path replace all '\\' characters with '/'.
         * For a POSIX DFS path we know all separators are already '/'. */

        pstrcpy(canon_dfspath, dfspath);
        if (!pdp->posix_path) {
                string_replace(canon_dfspath, '\\', '/');
        }

        /*
         * localpath comes out of unix_convert, so it has
         * no trailing backslash. Make sure that canon_dfspath hasn't either.
         * Fix for bug #4860 from Jan Martin <Jan.Martin@rwedea.com>.
         */

        trim_char(canon_dfspath,0,'/');

        /*
         * Redirect if any component in the path is a link.
         * We do this by walking backwards through the 
         * local path, chopping off the last component
         * in both the local path and the canonicalized
         * DFS path. If we hit a DFS link then we're done.
         */

        p = strrchr_m(localpath, '/');
        if (consumedcntp) {
                q = strrchr_m(canon_dfspath, '/');
        }

        while (p) {
                *p = '\0';
                if (q) {
                        *q = '\0';
                }

                if (is_msdfs_link(conn, localpath, targetpath, NULL)) {
                        DEBUG(4, ("dfs_path_lookup: Redirecting %s because "
                                "parent %s is dfs link\n", dfspath, localpath));

                        if (consumedcntp) {
                                *consumedcntp = strlen(canon_dfspath);
                                DEBUG(10, ("dfs_path_lookup: Path consumed: %s "
                                        "(%d)\n", canon_dfspath, *consumedcntp));
                        }

                        return NT_STATUS_PATH_NOT_COVERED;
                }

                /* Step back on the filesystem. */
                p = strrchr_m(localpath, '/');

                if (consumedcntp) {
                        /* And in the canonicalized dfs path. */
                        q = strrchr_m(canon_dfspath, '/');
                }
        }

        return NT_STATUS_OK;
}

static NTSTATUS dfs_redirect	(	connection_struct *	conn,
		pstring	dfs_path,
		BOOL	search_wcard_flag,
		BOOL *	ppath_contains_wcard
	)			[static]

msdfs.c の 509 行で定義されています。

参照先 dfs_path_lookup()・dfs_path::hostname・nt_errstr()・parse_dfs_path()・dfs_path::reqpath・dfs_path::servicename・status.

参照元 resolve_dfspath()・resolve_dfspath_wcard().

{
        NTSTATUS status;
        struct dfs_path dp;
        pstring targetpath;
        
        status = parse_dfs_path(conn, dfs_path, search_wcard_flag, &dp, ppath_contains_wcard);
        if (!NT_STATUS_IS_OK(status)) {
                return status;
        }

        if (dp.reqpath[0] == '\0') {
                pstrcpy(dfs_path, dp.reqpath);
                DEBUG(5,("dfs_redirect: self-referral.\n"));
                return NT_STATUS_OK;
        }

        /* If dfs pathname for a non-dfs share, convert to tcon-relative
           path and return OK */

        if (!lp_msdfs_root(SNUM(conn))) {
                pstrcpy(dfs_path, dp.reqpath);
                return NT_STATUS_OK;
        }

        /* If it looked like a local path (zero hostname/servicename)
         * just treat as a tcon-relative path. */ 

        if (dp.hostname[0] == '\0' && dp.servicename[0] == '\0') { 
                pstrcpy(dfs_path, dp.reqpath);
                return NT_STATUS_OK;
        }

        status = dfs_path_lookup(conn, dfs_path, &dp,
                        search_wcard_flag, NULL, targetpath);
        if (!NT_STATUS_IS_OK(status)) {
                if (NT_STATUS_EQUAL(status, NT_STATUS_PATH_NOT_COVERED)) {
                        DEBUG(3,("dfs_redirect: Redirecting %s\n", dfs_path));
                } else {
                        DEBUG(10,("dfs_redirect: dfs_path_lookup failed for %s with %s\n",
                                dfs_path, nt_errstr(status) ));
                }
                return status;
        }

        DEBUG(3,("dfs_redirect: Not redirecting %s.\n", dfs_path));

        /* Form non-dfs tcon-relative path */
        pstrcpy(dfs_path, dp.reqpath);

        DEBUG(3,("dfs_redirect: Path converted to non-dfs path %s\n", dfs_path));
        return NT_STATUS_OK;
}

static NTSTATUS self_ref	(	TALLOC_CTX *	ctx,
		const char *	dfs_path,
		struct junction_map *	jucn,
		int *	consumedcntp,
		BOOL *	self_referralp
	)			[static]

msdfs.c の 570 行で定義されています。

参照先 referral::alternate_path・referral::proximity・junction_map::referral_count・junction_map::referral_list・referral::ttl.

参照元 _dfs_Add()・_dfs_GetInfo()・_dfs_Remove()・get_referred_path().

{
        struct referral *ref;

        *self_referralp = True;

        jucn->referral_count = 1;
        if((ref = TALLOC_ZERO_P(ctx, struct referral)) == NULL) {
                DEBUG(0,("self_ref: talloc failed for referral\n"));
                return NT_STATUS_NO_MEMORY;
        }

        pstrcpy(ref->alternate_path,dfs_path);
        ref->proximity = 0;
        ref->ttl = REFERRAL_TTL;
        jucn->referral_list = ref;
        *consumedcntp = strlen(dfs_path);
        return NT_STATUS_OK;
}

NTSTATUS get_referred_path	(	TALLOC_CTX *	ctx,
		const char *	dfs_path,
		struct junction_map *	jucn,
		int *	consumedcntp,
		BOOL *	self_referralp
	)

msdfs.c の 599 行で定義されています。

参照先 referral::alternate_path・conn_free_internal()・create_conn_struct()・dfs_path_lookup()・find_service()・parse_dfs_path()・parse_msdfs_symlink()・referral::proximity・junction_map::referral_count・junction_map::referral_list・dfs_path::reqpath・self_ref()・junction_map::service_name・dfs_path::servicename・status・referral::ttl・junction_map::volume_name.

参照元 _dfs_Add()・_dfs_GetInfo()・_dfs_Remove()・setup_dfs_referral().

{
        struct connection_struct conns;
        struct connection_struct *conn = &conns;
        struct dfs_path dp;
        pstring conn_path;
        pstring targetpath;
        int snum;
        NTSTATUS status = NT_STATUS_NOT_FOUND;
        BOOL dummy;

        ZERO_STRUCT(conns);

        *self_referralp = False;

        status = parse_dfs_path(NULL, dfs_path, False, &dp, &dummy);
        if (!NT_STATUS_IS_OK(status)) {
                return status;
        }

        fstrcpy(jucn->service_name, dp.servicename);
        pstrcpy(jucn->volume_name, dp.reqpath);

        /* Verify the share is a dfs root */
        snum = lp_servicenumber(jucn->service_name);
        if(snum < 0) {
                if ((snum = find_service(jucn->service_name)) < 0) {
                        return NT_STATUS_NOT_FOUND;
                }
        }

        if (!lp_msdfs_root(snum)) {
                DEBUG(3,("get_referred_path: |%s| in dfs path %s is not a dfs root.\n",
                         dp.servicename, dfs_path));
                return NT_STATUS_NOT_FOUND;
        }

        /*
         * Self referrals are tested with a anonymous IPC connection and
         * a GET_DFS_REFERRAL call to \\server\share. (which means dp.reqpath[0] points
         * to an empty string). create_conn_struct cd's into the directory and will
         * fail if it cannot (as the anonymous user). Cope with this.
         */

        if (dp.reqpath[0] == '\0') {
                struct referral *ref;

                if (*lp_msdfs_proxy(snum) == '\0') {
                        return self_ref(ctx,
                                        dfs_path,
                                        jucn,
                                        consumedcntp,
                                        self_referralp);
                }

                /* 
                 * It's an msdfs proxy share. Redirect to
                 * the configured target share.
                 */

                jucn->referral_count = 1;
                if ((ref = TALLOC_ZERO_P(ctx, struct referral)) == NULL) {
                        DEBUG(0, ("malloc failed for referral\n"));
                        return NT_STATUS_NO_MEMORY;
                }

                pstrcpy(ref->alternate_path, lp_msdfs_proxy(snum));
                if (dp.reqpath[0] != '\0') {
                        pstrcat(ref->alternate_path, dp.reqpath);
                }
                ref->proximity = 0;
                ref->ttl = REFERRAL_TTL;
                jucn->referral_list = ref;
                *consumedcntp = strlen(dfs_path);
                return NT_STATUS_OK;
        }

        pstrcpy(conn_path, lp_pathname(snum));
        status = create_conn_struct(conn, snum, conn_path);
        if (!NT_STATUS_IS_OK(status)) {
                return status;
        }

        /* If this is a DFS path dfs_lookup should return
         * NT_STATUS_PATH_NOT_COVERED. */

        status = dfs_path_lookup(conn, dfs_path, &dp,
                        False, consumedcntp, targetpath);

        if (!NT_STATUS_EQUAL(status, NT_STATUS_PATH_NOT_COVERED)) {
                DEBUG(3,("get_referred_path: No valid referrals for path %s\n",
                        dfs_path));
                conn_free_internal(conn);
                return status;
        }

        /* We know this is a valid dfs link. Parse the targetpath. */
        if (!parse_msdfs_symlink(ctx, targetpath,
                                &jucn->referral_list,
                                &jucn->referral_count)) {
                DEBUG(3,("get_referred_path: failed to parse symlink "
                        "target %s\n", targetpath ));
                conn_free_internal(conn);
                return NT_STATUS_NOT_FOUND;
        }

        conn_free_internal(conn);
        return NT_STATUS_OK;
}

static int setup_ver2_dfs_referral	(	const char *	pathname,
		char **	ppdata,
		struct junction_map *	junction,
		int	consumedcnt,
		BOOL	self_referral
	)			[static]

msdfs.c の 713 行で定義されています。

参照先 referral::alternate_path・dump_data()・junction_map::referral_count・junction_map::referral_list・rpcstr_push().

参照元 setup_dfs_referral().

{
        char* pdata = *ppdata;

        unsigned char uni_requestedpath[1024];
        int uni_reqpathoffset1,uni_reqpathoffset2;
        int uni_curroffset;
        int requestedpathlen=0;
        int offset;
        int reply_size = 0;
        int i=0;

        DEBUG(10,("Setting up version2 referral\nRequested path:\n"));

        requestedpathlen = rpcstr_push(uni_requestedpath, pathname, sizeof(pstring),
                                       STR_TERMINATE);

        if (DEBUGLVL(10)) {
            dump_data(0, (const char *) uni_requestedpath,requestedpathlen);
        }

        DEBUG(10,("ref count = %u\n",junction->referral_count));

        uni_reqpathoffset1 = REFERRAL_HEADER_SIZE + 
                        VERSION2_REFERRAL_SIZE * junction->referral_count;

        uni_reqpathoffset2 = uni_reqpathoffset1 + requestedpathlen;

        uni_curroffset = uni_reqpathoffset2 + requestedpathlen;

        reply_size = REFERRAL_HEADER_SIZE + VERSION2_REFERRAL_SIZE*junction->referral_count +
                                        2 * requestedpathlen;
        DEBUG(10,("reply_size: %u\n",reply_size));

        /* add up the unicode lengths of all the referral paths */
        for(i=0;i<junction->referral_count;i++) {
                DEBUG(10,("referral %u : %s\n",i,junction->referral_list[i].alternate_path));
                reply_size += (strlen(junction->referral_list[i].alternate_path)+1)*2;
        }

        DEBUG(10,("reply_size = %u\n",reply_size));
        /* add the unexplained 0x16 bytes */
        reply_size += 0x16;

        pdata = (char *)SMB_REALLOC(pdata,reply_size);
        if(pdata == NULL) {
                DEBUG(0,("Realloc failed!\n"));
                return -1;
        }
        *ppdata = pdata;

        /* copy in the dfs requested paths.. required for offset calculations */
        memcpy(pdata+uni_reqpathoffset1,uni_requestedpath,requestedpathlen);
        memcpy(pdata+uni_reqpathoffset2,uni_requestedpath,requestedpathlen);

        /* create the header */
        SSVAL(pdata,0,consumedcnt * 2); /* path consumed */
        SSVAL(pdata,2,junction->referral_count); /* number of referral in this pkt */
        if(self_referral) {
                SIVAL(pdata,4,DFSREF_REFERRAL_SERVER | DFSREF_STORAGE_SERVER); 
        } else {
                SIVAL(pdata,4,DFSREF_STORAGE_SERVER);
        }

        offset = 8;
        /* add the referral elements */
        for(i=0;i<junction->referral_count;i++) {
                struct referral* ref = &junction->referral_list[i];
                int unilen;

                SSVAL(pdata,offset,2); /* version 2 */
                SSVAL(pdata,offset+2,VERSION2_REFERRAL_SIZE);
                if(self_referral) {
                        SSVAL(pdata,offset+4,1);
                } else {
                        SSVAL(pdata,offset+4,0);
                }
                SSVAL(pdata,offset+6,0); /* ref_flags :use path_consumed bytes? */
                SIVAL(pdata,offset+8,ref->proximity);
                SIVAL(pdata,offset+12,ref->ttl);

                SSVAL(pdata,offset+16,uni_reqpathoffset1-offset);
                SSVAL(pdata,offset+18,uni_reqpathoffset2-offset);
                /* copy referred path into current offset */
                unilen = rpcstr_push(pdata+uni_curroffset, ref->alternate_path,
                                     sizeof(pstring), STR_UNICODE);

                SSVAL(pdata,offset+20,uni_curroffset-offset);

                uni_curroffset += unilen;
                offset += VERSION2_REFERRAL_SIZE;
        }
        /* add in the unexplained 22 (0x16) bytes at the end */
        memset(pdata+uni_curroffset,'\0',0x16);
        return reply_size;
}

static int setup_ver3_dfs_referral	(	const char *	pathname,
		char **	ppdata,
		struct junction_map *	junction,
		int	consumedcnt,
		BOOL	self_referral
	)			[static]

msdfs.c の 814 行で定義されています。

参照先 referral::alternate_path・dump_data()・junction_map::referral_count・junction_map::referral_list・rpcstr_push().

参照元 setup_dfs_referral().

{
        char* pdata = *ppdata;

        unsigned char uni_reqpath[1024];
        int uni_reqpathoffset1, uni_reqpathoffset2;
        int uni_curroffset;
        int reply_size = 0;

        int reqpathlen = 0;
        int offset,i=0;
        
        DEBUG(10,("setting up version3 referral\n"));

        reqpathlen = rpcstr_push(uni_reqpath, pathname, sizeof(pstring), STR_TERMINATE);
        
        if (DEBUGLVL(10)) {
            dump_data(0, (char *) uni_reqpath,reqpathlen);
        }

        uni_reqpathoffset1 = REFERRAL_HEADER_SIZE + VERSION3_REFERRAL_SIZE * junction->referral_count;
        uni_reqpathoffset2 = uni_reqpathoffset1 + reqpathlen;
        reply_size = uni_curroffset = uni_reqpathoffset2 + reqpathlen;

        for(i=0;i<junction->referral_count;i++) {
                DEBUG(10,("referral %u : %s\n",i,junction->referral_list[i].alternate_path));
                reply_size += (strlen(junction->referral_list[i].alternate_path)+1)*2;
        }

        pdata = (char *)SMB_REALLOC(pdata,reply_size);
        if(pdata == NULL) {
                DEBUG(0,("version3 referral setup: malloc failed for Realloc!\n"));
                return -1;
        }
        *ppdata = pdata;

        /* create the header */
        SSVAL(pdata,0,consumedcnt * 2); /* path consumed */
        SSVAL(pdata,2,junction->referral_count); /* number of referral */
        if(self_referral) {
                SIVAL(pdata,4,DFSREF_REFERRAL_SERVER | DFSREF_STORAGE_SERVER); 
        } else {
                SIVAL(pdata,4,DFSREF_STORAGE_SERVER);
        }
        
        /* copy in the reqpaths */
        memcpy(pdata+uni_reqpathoffset1,uni_reqpath,reqpathlen);
        memcpy(pdata+uni_reqpathoffset2,uni_reqpath,reqpathlen);
        
        offset = 8;
        for(i=0;i<junction->referral_count;i++) {
                struct referral* ref = &(junction->referral_list[i]);
                int unilen;

                SSVAL(pdata,offset,3); /* version 3 */
                SSVAL(pdata,offset+2,VERSION3_REFERRAL_SIZE);
                if(self_referral) {
                        SSVAL(pdata,offset+4,1);
                } else {
                        SSVAL(pdata,offset+4,0);
                }

                SSVAL(pdata,offset+6,0); /* ref_flags :use path_consumed bytes? */
                SIVAL(pdata,offset+8,ref->ttl);
            
                SSVAL(pdata,offset+12,uni_reqpathoffset1-offset);
                SSVAL(pdata,offset+14,uni_reqpathoffset2-offset);
                /* copy referred path into current offset */
                unilen = rpcstr_push(pdata+uni_curroffset,ref->alternate_path,
                                     sizeof(pstring), STR_UNICODE | STR_TERMINATE);
                SSVAL(pdata,offset+16,uni_curroffset-offset);
                /* copy 0x10 bytes of 00's in the ServiceSite GUID */
                memset(pdata+offset+18,'\0',16);

                uni_curroffset += unilen;
                offset += VERSION3_REFERRAL_SIZE;
        }
        return reply_size;
}

int setup_dfs_referral	(	connection_struct *	orig_conn,
		const char *	dfs_path,
		int	max_referral_level,
		char **	ppdata,
		NTSTATUS *	pstatus
	)

msdfs.c の 905 行で定義されています。

参照先 referral::alternate_path・connection_struct::connectpath・ctx・dbgtext()・dump_data()・get_referred_path()・junction_map::referral_count・junction_map::referral_list・setup_ver2_dfs_referral()・setup_ver3_dfs_referral()・talloc_init()・vfs_ChDir().

参照元 call_trans2getdfsreferral().

{
        struct junction_map junction;
        int consumedcnt = 0;
        BOOL self_referral = False;
        int reply_size = 0;
        char *pathnamep = NULL;
        pstring local_dfs_path;
        TALLOC_CTX *ctx;

        if (!(ctx=talloc_init("setup_dfs_referral"))) {
                *pstatus = NT_STATUS_NO_MEMORY;
                return -1;
        }

        ZERO_STRUCT(junction);

        /* get the junction entry */
        if (!dfs_path) {
                talloc_destroy(ctx);
                *pstatus = NT_STATUS_NOT_FOUND;
                return -1;
        }

        /* 
         * Trim pathname sent by client so it begins with only one backslash.
         * Two backslashes confuse some dfs clients
         */

        pstrcpy(local_dfs_path, dfs_path);
        pathnamep = local_dfs_path;
        while (IS_DIRECTORY_SEP(pathnamep[0]) && IS_DIRECTORY_SEP(pathnamep[1])) {
                pathnamep++;
        }

        /* The following call can change cwd. */
        *pstatus = get_referred_path(ctx, pathnamep, &junction, &consumedcnt, &self_referral);
        if (!NT_STATUS_IS_OK(*pstatus)) {
                vfs_ChDir(orig_conn,orig_conn->connectpath);
                talloc_destroy(ctx);
                return -1;
        }
        vfs_ChDir(orig_conn,orig_conn->connectpath);
        
        if (!self_referral) {
                pathnamep[consumedcnt] = '\0';

                if( DEBUGLVL( 3 ) ) {
                        int i=0;
                        dbgtext("setup_dfs_referral: Path %s to alternate path(s):",pathnamep);
                        for(i=0;i<junction.referral_count;i++)
                                dbgtext(" %s",junction.referral_list[i].alternate_path);
                        dbgtext(".\n");
                }
        }

        /* create the referral depeding on version */
        DEBUG(10,("max_referral_level :%d\n",max_referral_level));

        if (max_referral_level < 2) {
                max_referral_level = 2;
        }
        if (max_referral_level > 3) {
                max_referral_level = 3;
        }

        switch(max_referral_level) {
        case 2:
                reply_size = setup_ver2_dfs_referral(pathnamep, ppdata, &junction, 
                                                     consumedcnt, self_referral);
                break;
        case 3:
                reply_size = setup_ver3_dfs_referral(pathnamep, ppdata, &junction, 
                                                     consumedcnt, self_referral);
                break;
        default:
                DEBUG(0,("setup_dfs_referral: Invalid dfs referral version: %d\n", max_referral_level));
                talloc_destroy(ctx);
                *pstatus = NT_STATUS_INVALID_LEVEL;
                return -1;
        }
      
        if (DEBUGLVL(10)) {
                DEBUGADD(0,("DFS Referral pdata:\n"));
                dump_data(0,*ppdata,reply_size);
        }

        talloc_destroy(ctx);
        *pstatus = NT_STATUS_OK;
        return reply_size;
}

BOOL create_junction	(	const char *	dfs_path,
		struct junction_map *	jucn
	)

msdfs.c の 1008 行で定義されています。

参照先 junction_map::comment・dfs_path::hostname・is_myname_or_ipaddr()・parse_dfs_path()・dfs_path::reqpath・junction_map::service_name・dfs_path::servicename・status・junction_map::volume_name.

参照元 _dfs_GetInfo().

{
        int snum;
        BOOL dummy;
        struct dfs_path dp;
 
        NTSTATUS status = parse_dfs_path(NULL, dfs_path, False, &dp, &dummy);

        if (!NT_STATUS_IS_OK(status)) {
                return False;
        }

        /* check if path is dfs : validate first token */
        if (!is_myname_or_ipaddr(dp.hostname)) {
                DEBUG(4,("create_junction: Invalid hostname %s in dfs path %s\n",
                        dp.hostname, dfs_path));
                return False;
        }

        /* Check for a non-DFS share */
        snum = lp_servicenumber(dp.servicename);

        if(snum < 0 || !lp_msdfs_root(snum)) {
                DEBUG(4,("create_junction: %s is not an msdfs root.\n",
                        dp.servicename));
                return False;
        }

        fstrcpy(jucn->service_name,dp.servicename);
        pstrcpy(jucn->volume_name,dp.reqpath);
        pstrcpy(jucn->comment, lp_comment(snum));
        return True;
}

static BOOL junction_to_local_path	(	struct junction_map *	jucn,
		char *	path,
		int	max_pathlen,
		connection_struct *	conn_out
	)			[static]

msdfs.c の 1046 行で定義されています。

参照先 create_conn_struct()・junction_map::service_name・junction_map::volume_name.

参照元 create_msdfs_link()・remove_msdfs_link().

{
        int snum;
        pstring conn_path;

        snum = lp_servicenumber(jucn->service_name);
        if(snum < 0) {
                return False;
        }

        safe_strcpy(path, lp_pathname(snum), max_pathlen-1);
        safe_strcat(path, "/", max_pathlen-1);
        safe_strcat(path, jucn->volume_name, max_pathlen-1);

        pstrcpy(conn_path, lp_pathname(snum));
        if (!NT_STATUS_IS_OK(create_conn_struct(conn_out, snum, conn_path))) {
                return False;
        }

        return True;
}

BOOL create_msdfs_link	(	struct junction_map *	jucn,
		BOOL	exists
	)

msdfs.c の 1071 行で定義されています。

参照先 referral::alternate_path・conn_free_internal()・errno・junction_to_local_path()・junction_map::referral_count・junction_map::referral_list・strerror()・trim_char().

参照元 _dfs_Add()・_dfs_Remove().

{
        pstring path;
        pstring msdfs_link;
        connection_struct conns;
        connection_struct *conn = &conns;
        int i=0;
        BOOL insert_comma = False;
        BOOL ret = False;

        ZERO_STRUCT(conns);

        if(!junction_to_local_path(jucn, path, sizeof(path), conn)) {
                return False;
        }
  
        /* Form the msdfs_link contents */
        pstrcpy(msdfs_link, "msdfs:");
        for(i=0; i<jucn->referral_count; i++) {
                char* refpath = jucn->referral_list[i].alternate_path;
      
                /* Alternate paths always use Windows separators. */
                trim_char(refpath, '\\', '\\');
                if(*refpath == '\0') {
                        if (i == 0) {
                                insert_comma = False;
                        }
                        continue;
                }
                if (i > 0 && insert_comma) {
                        pstrcat(msdfs_link, ",");
                }

                pstrcat(msdfs_link, refpath);
                if (!insert_comma) {
                        insert_comma = True;
                }
        }

        DEBUG(5,("create_msdfs_link: Creating new msdfs link: %s -> %s\n",
                path, msdfs_link));

        if(exists) {
                if(SMB_VFS_UNLINK(conn,path)!=0) {
                        goto out;
                }
        }

        if(SMB_VFS_SYMLINK(conn, msdfs_link, path) < 0) {
                DEBUG(1,("create_msdfs_link: symlink failed %s -> %s\nError: %s\n", 
                                path, msdfs_link, strerror(errno)));
                goto out;
        }
        
        
        ret = True;

out:

        conn_free_internal(conn);
        return ret;
}

BOOL remove_msdfs_link

(

struct junction_map *

jucn

)

msdfs.c の 1134 行で定義されています。

参照先 conn_free_internal()・junction_to_local_path().

参照元 _dfs_Remove().

{
        pstring path;
        connection_struct conns;
        connection_struct *conn = &conns;
        BOOL ret = False;

        ZERO_STRUCT(conns);

        if( junction_to_local_path(jucn, path, sizeof(path), conn) ) {
                if( SMB_VFS_UNLINK(conn, path) == 0 ) {
                        ret = True;
                }
                talloc_destroy( conn->mem_ctx );
        }

        conn_free_internal(conn);
        return ret;
}

static int form_junctions	(	TALLOC_CTX *	ctx,
		int	snum,
		struct junction_map *	jucn,
		int	jn_remain
	)			[static]

msdfs.c の 1154 行で定義されています。

参照先 referral::alternate_path・conn_free_internal()・create_conn_struct()・get_local_machine_name()・is_msdfs_link()・parse_msdfs_symlink()・referral::proximity・pstr_sprintf()・junction_map::referral_count・junction_map::referral_list・referral::ttl・vfs_readdirname()・junction_map::volume_name.

参照元 enum_msdfs_links().

{
        int cnt = 0;
        SMB_STRUCT_DIR *dirp;
        char *dname;
        pstring connect_path;
        char *service_name = lp_servicename(snum);
        connection_struct conn;
        struct referral *ref = NULL;
 
        ZERO_STRUCT(conn);

        if (jn_remain <= 0) {
                return 0;
        }

        pstrcpy(connect_path,lp_pathname(snum));

        if(*connect_path == '\0') {
                return 0;
        }

        /*
         * Fake up a connection struct for the VFS layer.
         */

        if (!NT_STATUS_IS_OK(create_conn_struct(&conn, snum, connect_path))) {
                return 0;
        }

        /* form a junction for the msdfs root - convention 
           DO NOT REMOVE THIS: NT clients will not work with us
           if this is not present
        */ 
        fstrcpy(jucn[cnt].service_name, service_name);
        jucn[cnt].volume_name[0] = '\0';
        jucn[cnt].referral_count = 1;

        ref = jucn[cnt].referral_list = TALLOC_ZERO_P(ctx, struct referral);
        if (jucn[cnt].referral_list == NULL) {
                DEBUG(0, ("talloc failed!\n"));
                goto out;
        }

        ref->proximity = 0;
        ref->ttl = REFERRAL_TTL;
        if (*lp_msdfs_proxy(snum) != '\0') {
                pstrcpy(ref->alternate_path, lp_msdfs_proxy(snum));
                cnt++;
                goto out;
        }

        pstr_sprintf(ref->alternate_path, "\\\\%s\\%s",
                        get_local_machine_name(),
                        service_name);
        cnt++;

        /* Now enumerate all dfs links */
        dirp = SMB_VFS_OPENDIR(&conn, ".", NULL, 0);
        if(!dirp) {
                goto out;
        }

        while ((dname = vfs_readdirname(&conn, dirp)) != NULL) {
                pstring link_target;
                if (cnt >= jn_remain) {
                        SMB_VFS_CLOSEDIR(&conn,dirp);
                        DEBUG(2, ("ran out of MSDFS junction slots"));
                        goto out;
                }
                if (is_msdfs_link(&conn, dname, link_target, NULL)) {
                        if (parse_msdfs_symlink(ctx,
                                        link_target,
                                        &jucn[cnt].referral_list,
                                        &jucn[cnt].referral_count)) {

                                fstrcpy(jucn[cnt].service_name, service_name);
                                pstrcpy(jucn[cnt].volume_name, dname);
                                cnt++;
                        }
                }
        }
        
        SMB_VFS_CLOSEDIR(&conn,dirp);

out:

        conn_free_internal(&conn);
        return cnt;
}

int enum_msdfs_links	(	TALLOC_CTX *	ctx,
		struct junction_map *	jucn,
		int	jn_max
	)

msdfs.c の 1248 行で定義されています。

参照先 become_root()・form_junctions()・unbecome_root().

参照元 _dfs_Enum().

{
        int i=0;
        int sharecount = 0;
        int jn_count = 0;

        if(!lp_host_msdfs()) {
                return 0;
        }

        /* Ensure all the usershares are loaded. */
        become_root();
        sharecount = load_usershare_shares();
        unbecome_root();

        for(i=0;i < sharecount && (jn_max - jn_count) > 0;i++) {
                if(lp_msdfs_root(i)) {
                        jn_count += form_junctions(ctx, i,jucn,jn_max - jn_count);
                }
        }
        return jn_count;
}

NTSTATUS resolve_dfspath	(	connection_struct *	conn,
		BOOL	dfs_pathnames,
		pstring	name
	)

msdfs.c の 1275 行で定義されています。

参照先 dfs_redirect()・status.

参照元 call_nt_transact_create()・call_trans2qfilepathinfo()・call_trans2setfilepathinfo()・reply_checkpath()・reply_ctemp()・reply_getatr()・reply_mkdir()・reply_mknew()・reply_ntcreate_and_X()・reply_ntrename()・reply_open()・reply_open_and_X()・reply_rmdir()・reply_setatr()・reply_setdir()・smb_set_file_unix_hlink().

{
        NTSTATUS status = NT_STATUS_OK;
        BOOL dummy;
        if (dfs_pathnames) {
                status = dfs_redirect(conn, name, False, &dummy);
        }
        return status;
}

NTSTATUS resolve_dfspath_wcard	(	connection_struct *	conn,
		BOOL	dfs_pathnames,
		pstring	name,
		BOOL *	ppath_contains_wcard
	)

msdfs.c の 1292 行で定義されています。

参照先 dfs_redirect()・status.

参照元 call_trans2findfirst()・reply_copy()・reply_mv()・reply_search()・reply_unlink()・smb_file_rename_information().

{
        NTSTATUS status = NT_STATUS_OK;
        if (dfs_pathnames) {
                status = dfs_redirect(conn, name, True, ppath_contains_wcard);
        }
        return status;
}

---

変数

uint32 global_client_caps

sesssetup.c の 32 行で定義されています。

---