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authorAndrew Tridgell <tridge@samba.org>2003-08-13 01:53:07 +0000
committerAndrew Tridgell <tridge@samba.org>2003-08-13 01:53:07 +0000
commitef2e26c91b80556af033d3335e55f5dfa6fff31d (patch)
treefaa21bfd7e7b5247250b47c7891dc1a5ebee6be9 /source4/msdfs
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first public release of samba4 code
(This used to be commit b0510b5428b3461aeb9bbe3cc95f62fc73e2b97f)
Diffstat (limited to 'source4/msdfs')
-rw-r--r--source4/msdfs/README32
-rw-r--r--source4/msdfs/msdfs.c913
2 files changed, 945 insertions, 0 deletions
diff --git a/source4/msdfs/README b/source4/msdfs/README
new file mode 100644
index 0000000000..0e924b31dc
--- /dev/null
+++ b/source4/msdfs/README
@@ -0,0 +1,32 @@
+Setting up MS Dfs in Samba
+kalele@veritas.com March 2000
+
+Currently, MS Dfs support is a configure time parameter (--with-msdfs). Can be changed later to always compile it in..
+
+To have a server announce itself as a Dfs server, add a "host msdfs=yes" entry to smb.conf.
+
+To make a share a Dfs root, add a "msdfs root=yes" entry to the share definition
+in the smb.conf file.
+e.g.
+[pub]
+ path = /export/publicsmb
+ msdfs root = yes
+
+To create dfs volumes/junctions in the share, create symbolic links of the
+format msdfs:server1\share1,server2\share2 and so on.
+
+In the above example, create a dfs volume "dfsstorage" in the [pub] share as:
+cd /export/publicsmb
+ln -s msdfs:serverA\\share dfsstorage
+
+Clicking on dfsstorage from a dfs-aware client will show you the contents of
+\\serverA\share
+
+Shares with "msdfs root = no" (which is the default) entries are served as normal
+shares and the client stops talking Dfs with Samba after a tconX.
+
+NOTES:
+* Windows clients need to be rebooted if a non-dfs root is made a dfs root or
+ vice versa. A better option is to introduce a new share and make it the dfs root.
+* Currently there's a restriction that msdfs symlink names should be all
+ lowercase.
diff --git a/source4/msdfs/msdfs.c b/source4/msdfs/msdfs.c
new file mode 100644
index 0000000000..ac9566fea9
--- /dev/null
+++ b/source4/msdfs/msdfs.c
@@ -0,0 +1,913 @@
+/*
+ Unix SMB/Netbios implementation.
+ Version 3.0
+ MSDfs services for Samba
+ Copyright (C) Shirish Kalele 2000
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include "includes.h"
+
+extern fstring local_machine;
+extern uint32 global_client_caps;
+#ifdef 1
+static uint32 dfs_referral_tries = 0;
+#endif
+
+/**********************************************************************
+ Parse the pathname of the form \hostname\service\reqpath
+ into the dfs_path structure
+ **********************************************************************/
+
+static BOOL parse_dfs_path(const char *pathname, struct dfs_path* pdp)
+{
+ pstring pathname_local;
+ char* p,*temp;
+
+ pstrcpy(pathname_local,pathname);
+ p = temp = pathname_local;
+
+ ZERO_STRUCTP(pdp);
+
+ trim_string(temp,"\\","\\");
+ DEBUG(10,("temp in parse_dfs_path: .%s. after trimming \\'s\n",temp));
+
+ /* now tokenize */
+ /* parse out hostname */
+ p = strchr(temp,'\\');
+ if(p == NULL)
+ return False;
+ *p = '\0';
+ pstrcpy(pdp->hostname,temp);
+ DEBUG(10,("hostname: %s\n",pdp->hostname));
+
+ /* parse out servicename */
+ temp = p+1;
+ p = strchr(temp,'\\');
+ if(p == NULL) {
+ pstrcpy(pdp->servicename,temp);
+ pdp->reqpath[0] = '\0';
+ return True;
+ }
+ *p = '\0';
+ pstrcpy(pdp->servicename,temp);
+ DEBUG(10,("servicename: %s\n",pdp->servicename));
+
+ /* rest is reqpath */
+ pstrcpy(pdp->reqpath, p+1);
+ p = pdp->reqpath;
+ while (*p) {
+ if (*p == '\\') *p = '/';
+ p++;
+ }
+
+ DEBUG(10,("rest of the path: %s\n",pdp->reqpath));
+ return True;
+}
+
+/********************************************************
+ Fake up a connection struct for the VFS layer.
+*********************************************************/
+
+static BOOL create_conn_struct( struct tcon_context *conn, int snum, char *path)
+{
+ ZERO_STRUCTP(conn);
+ conn->service = snum;
+ conn->connectpath = path;
+ pstring_sub(conn->connectpath , "%S", lp_servicename(snum));
+
+ if (!smbd_vfs_init(conn)) {
+ DEBUG(0,("create_conn_struct: smbd_vfs_init failed.\n"));
+ return False;
+ }
+ return True;
+}
+
+
+/**********************************************************************
+ Parse the contents of a symlink to verify if it is an msdfs referral
+ A valid referral is of the form: msdfs:server1\share1,server2\share2
+ **********************************************************************/
+static BOOL parse_symlink(char* buf,struct referral** preflist,
+ int* refcount)
+{
+ pstring temp;
+ char* prot;
+ char* alt_path[MAX_REFERRAL_COUNT];
+ int count=0, i;
+ struct referral* reflist;
+
+ pstrcpy(temp,buf);
+
+ prot = strtok(temp,":");
+
+ if (!strequal(prot, "msdfs"))
+ return False;
+
+ /* No referral list requested. Just yes/no. */
+ if (!preflist)
+ return True;
+
+ /* parse out the alternate paths */
+ while(((alt_path[count] = strtok(NULL,",")) != NULL) && count<MAX_REFERRAL_COUNT)
+ count++;
+
+ DEBUG(10,("parse_symlink: count=%d\n", count));
+
+ reflist = *preflist = (struct referral*) malloc(count * sizeof(struct referral));
+ if(reflist == NULL) {
+ DEBUG(0,("parse_symlink: Malloc failed!\n"));
+ return False;
+ }
+
+ for(i=0;i<count;i++) {
+ /* replace / in the alternate path by a \ */
+ char* p = strchr(alt_path[i],'/');
+ int j = i;
+#ifdef 1
+ // used for testing splitting files between servers
+ if ((count == 2) &&
+ (dfs_referral_tries & 0xfffffffe) // this will reverse the order of the list
+ j = count - 1;
+ dfs_referral_tries++;
+#endif
+ if(p)
+ *p = '\\';
+
+ pstrcpy(reflist[j].alternate_path, "\\");
+ pstrcat(reflist[j].alternate_path, alt_path[i]);
+ reflist[j].proximity = 0;
+ reflist[j].ttl = REFERRAL_TTL;
+ DEBUG(10, ("parse_symlink: Created alt path: %s\n", reflist[j].alternate_path));
+ }
+
+ if(refcount)
+ *refcount = count;
+
+ return True;
+}
+
+/**********************************************************************
+ Returns true if the unix path is a valid msdfs symlink
+ **********************************************************************/
+BOOL is_msdfs_link(struct tcon_context *conn, char* path,
+ struct referral** reflistp, int* refcnt,
+ SMB_STRUCT_STAT *sbufp)
+{
+ SMB_STRUCT_STAT st;
+ pstring referral;
+ int referral_len = 0;
+
+ if (!path || !conn)
+ return False;
+
+ strlower(path);
+
+ if (sbufp == NULL)
+ sbufp = &st;
+
+ if (conn->vfs_ops.lstat(conn, path, sbufp) != 0) {
+ DEBUG(5,("is_msdfs_link: %s does not exist.\n",path));
+ return False;
+ }
+
+ if (S_ISLNK(sbufp->st_mode)) {
+ /* open the link and read it */
+ referral_len = conn->vfs_ops.readlink(conn, path, referral,
+ sizeof(pstring));
+ if (referral_len == -1) {
+ DEBUG(0,("is_msdfs_link: Error reading msdfs link %s: %s\n", path, strerror(errno)));
+ return False;
+ }
+
+ referral[referral_len] = '\0';
+ DEBUG(5,("is_msdfs_link: %s -> %s\n",path,referral));
+ if (parse_symlink(referral, reflistp, refcnt))
+ return True;
+ }
+ return False;
+}
+
+/*****************************************************************
+ Used by other functions to decide if a dfs path is remote,
+and to get the list of referred locations for that remote path.
+
+findfirst_flag: For findfirsts, dfs links themselves are not
+redirected, but paths beyond the links are. For normal smb calls,
+even dfs links need to be redirected.
+
+self_referralp: clients expect a dfs referral for the same share when
+they request referrals for dfs roots on a server.
+
+consumedcntp: how much of the dfs path is being redirected. the client
+should try the remaining path on the redirected server.
+*****************************************************************/
+static BOOL resolve_dfs_path(char* dfspath, struct dfs_path* dp,
+ struct tcon_context *conn,
+ BOOL findfirst_flag,
+ struct referral** reflistpp, int* refcntp,
+ BOOL* self_referralp, int* consumedcntp)
+{
+ fstring localpath;
+
+ char *p;
+ fstring reqpath;
+
+ if (!dp || !conn) {
+ DEBUG(1,("resolve_dfs_path: NULL dfs_path* or NULL tcon_context!\n"));
+ return False;
+ }
+
+ if (dp->reqpath[0] == '\0') {
+ if (self_referralp) {
+ DEBUG(6,("resolve_dfs_path: self-referral. returning False\n"));
+ *self_referralp = True;
+ }
+ return False;
+ }
+
+ /* check if need to redirect */
+ fstrcpy(localpath, conn->connectpath);
+ fstrcat(localpath, "/");
+ fstrcat(localpath, dp->reqpath);
+ if (is_msdfs_link(conn, localpath, reflistpp, refcntp, NULL))
+ {
+ if (findfirst_flag) {
+ DEBUG(6,("resolve_dfs_path (FindFirst) No redirection "
+ "for dfs link %s.\n", dfspath));
+ return False;
+ } else {
+ DEBUG(6,("resolve_dfs_path: %s resolves to a valid Dfs link.\n",
+ dfspath));
+ if (consumedcntp)
+ *consumedcntp = strlen(dfspath);
+ return True;
+ }
+ }
+
+ /* also redirect if the parent directory is a dfs link */
+ fstrcpy(reqpath, dp->reqpath);
+ p = strrchr(reqpath, '/');
+ if (p) {
+ *p = '\0';
+ fstrcpy(localpath, conn->connectpath);
+ fstrcat(localpath, "/");
+ fstrcat(localpath, reqpath);
+ if (is_msdfs_link(conn, localpath, reflistpp, refcntp, NULL)) {
+ DEBUG(4, ("resolve_dfs_path: Redirecting %s because parent %s is dfs link\n", dfspath, localpath));
+
+ /* To find the path consumed, we truncate the original
+ DFS pathname passed to use to remove the last
+ component. The length of the resulting string is
+ the path consumed
+ */
+ if (consumedcntp) {
+ char *q;
+ pstring buf;
+ pstrcpy(buf, dfspath);
+ trim_string(buf, NULL, "\\");
+ q = strrchr(buf, '\\');
+ if (q)
+ *q = '\0';
+ *consumedcntp = strlen(buf);
+ DEBUG(10, ("resolve_dfs_path: Path consumed: %d\n", *consumedcntp));
+ }
+
+ return True;
+ }
+ }
+
+ return False;
+}
+
+/*****************************************************************
+ Decides if a dfs pathname should be redirected or not.
+ If not, the pathname is converted to a tcon-relative local unix path
+*****************************************************************/
+BOOL dfs_redirect(const char *pathname, struct tcon_context *conn,
+ BOOL findfirst_flag)
+{
+ struct dfs_path dp;
+
+ if (!conn || !pathname)
+ return False;
+
+ parse_dfs_path(pathname, &dp);
+
+ /* if dfs pathname for a non-dfs share, convert to tcon-relative
+ path and return false */
+ if (!lp_msdfs_root(SNUM(conn))) {
+ fstrcpy(pathname, dp.reqpath);
+ return False;
+ }
+
+ if (strcasecmp(dp.servicename, lp_servicename(SNUM(conn)) ) != 0)
+ return False;
+
+ if (resolve_dfs_path(pathname, &dp, conn, findfirst_flag,
+ NULL, NULL, NULL, NULL)) {
+ DEBUG(3,("dfs_redirect: Redirecting %s\n", pathname));
+ return True;
+ } else {
+ DEBUG(3,("dfs_redirect: Not redirecting %s.\n", pathname));
+
+ /* Form non-dfs tcon-relative path */
+ fstrcpy(pathname, dp.reqpath);
+ DEBUG(3,("dfs_redirect: Path converted to non-dfs path %s\n",
+ pathname));
+ return False;
+ }
+ /* never reached */
+ return False;
+}
+
+/**********************************************************************
+ Gets valid referrals for a dfs path and fills up the
+ junction_map structure
+ **********************************************************************/
+BOOL get_referred_path(char *pathname, struct junction_map* jn,
+ int* consumedcntp, BOOL* self_referralp)
+{
+ struct dfs_path dp;
+
+ struct tcon_context conns;
+ struct tcon_context *conn = &conns;
+ pstring conn_path;
+ int snum;
+
+ BOOL self_referral = False;
+
+ if (!pathname || !jn)
+ return False;
+
+ if (self_referralp)
+ *self_referralp = False;
+ else
+ self_referralp = &self_referral;
+
+ parse_dfs_path(pathname, &dp);
+
+ /* Verify hostname in path */
+ if (local_machine && (strcasecmp(local_machine, dp.hostname) != 0)) {
+
+ /* Hostname mismatch, check if one of our IP addresses */
+ if (!ismyip(*interpret_addr2(dp.hostname))) {
+
+ DEBUG(3, ("get_referred_path: Invalid hostname %s in path %s\n",
+ dp.hostname, pathname));
+ return False;
+ }
+ }
+
+ pstrcpy(jn->service_name, dp.servicename);
+ pstrcpy(jn->volume_name, dp.reqpath);
+
+ /* Verify the share is a dfs root */
+ snum = lp_servicenumber(jn->service_name);
+ if(snum < 0) {
+ if ((snum = find_service(jn->service_name)) < 0)
+ return False;
+ }
+
+ pstrcpy(conn_path, lp_pathname(snum));
+ if (!create_conn_struct(conn, snum, conn_path))
+ return False;
+
+ if (!lp_msdfs_root(SNUM(conn))) {
+ DEBUG(3,("get_referred_path: .%s. in dfs path %s is not a dfs root.\n",
+ dp.servicename, pathname));
+ return False;
+ }
+
+ if (*lp_msdfs_proxy(snum) != '\0') {
+ struct referral* ref;
+ jn->referral_count = 1;
+ if ((ref = (struct referral*) malloc(sizeof(struct referral)))
+ == NULL) {
+ DEBUG(0, ("malloc failed for referral\n"));
+ return False;
+ }
+
+ 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;
+ jn->referral_list = ref;
+ if (consumedcntp)
+ *consumedcntp = strlen(pathname);
+ return True;
+ }
+
+ /* If not remote & not a self referral, return False */
+ if (!resolve_dfs_path(pathname, &dp, conn, False,
+ &jn->referral_list, &jn->referral_count,
+ self_referralp, consumedcntp)) {
+ if (!*self_referralp) {
+ DEBUG(3,("get_referred_path: No valid referrals for path %s\n", pathname));
+ return False;
+ }
+ }
+
+ /* if self_referral, fill up the junction map */
+ if (*self_referralp) {
+ struct referral* ref;
+ jn->referral_count = 1;
+ if((ref = (struct referral*) malloc(sizeof(struct referral)))
+ == NULL) {
+ DEBUG(0,("malloc failed for referral\n"));
+ return False;
+ }
+
+ pstrcpy(ref->alternate_path,pathname);
+ ref->proximity = 0;
+ ref->ttl = REFERRAL_TTL;
+ jn->referral_list = ref;
+ if (consumedcntp)
+ *consumedcntp = strlen(pathname);
+ }
+
+ return True;
+}
+
+static int setup_ver2_dfs_referral(char* pathname, char** ppdata,
+ struct junction_map* junction,
+ int consumedcnt,
+ BOOL self_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, -1,
+ STR_TERMINATE);
+
+ dump_data(10, (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 = Realloc(pdata,reply_size);
+ if(pdata == NULL) {
+ DEBUG(0,("malloc failed for Realloc!\n"));
+ return -1;
+ } else
+ *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,
+ -1, 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(char* pathname, char** ppdata,
+ struct junction_map* junction,
+ int consumedcnt,
+ BOOL self_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, -1, STR_TERMINATE);
+
+ dump_data(10, (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 = Realloc(pdata,reply_size);
+ if(pdata == NULL) {
+ DEBUG(0,("version3 referral setup: malloc failed for Realloc!\n"));
+ return -1;
+ } else
+ *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,
+ -1, 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;
+}
+
+/******************************************************************
+ * Set up the Dfs referral for the dfs pathname
+ ******************************************************************/
+
+int setup_dfs_referral(char* pathname, int max_referral_level, char** ppdata)
+{
+ struct junction_map junction;
+ int consumedcnt;
+ BOOL self_referral = False;
+ pstring buf;
+ int reply_size = 0;
+ char *pathnamep = pathname;
+
+ ZERO_STRUCT(junction);
+
+ /* get the junction entry */
+ if (!pathnamep)
+ return -1;
+
+ /* Trim pathname sent by client so it begins with only one backslash.
+ Two backslashes confuse some dfs clients
+ */
+ while (strlen(pathnamep) > 1 && pathnamep[0] == '\\'
+ && pathnamep[1] == '\\')
+ pathnamep++;
+
+ pstrcpy(buf, pathnamep);
+ if (!get_referred_path(buf, &junction, &consumedcnt,
+ &self_referral))
+ return -1;
+
+ 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>3)
+ max_referral_level = 2;
+
+ switch(max_referral_level) {
+ case 2:
+ {
+ reply_size = setup_ver2_dfs_referral(pathnamep, ppdata, &junction,
+ consumedcnt, self_referral);
+ SAFE_FREE(junction.referral_list);
+ break;
+ }
+ case 3:
+ {
+ reply_size = setup_ver3_dfs_referral(pathnamep, ppdata, &junction,
+ consumedcnt, self_referral);
+ SAFE_FREE(junction.referral_list);
+ break;
+ }
+ default:
+ {
+ DEBUG(0,("setup_dfs_referral: Invalid dfs referral version: %d\n", max_referral_level));
+ return -1;
+ }
+ }
+
+ DEBUG(10,("DFS Referral pdata:\n"));
+ dump_data(10,*ppdata,reply_size);
+ return reply_size;
+}
+
+/**********************************************************************
+ The following functions are called by the NETDFS RPC pipe functions
+ **********************************************************************/
+
+/**********************************************************************
+ Creates a junction structure from a Dfs pathname
+ **********************************************************************/
+BOOL create_junction(char* pathname, struct junction_map* jn)
+{
+ struct dfs_path dp;
+
+ parse_dfs_path(pathname,&dp);
+
+ /* check if path is dfs : validate first token */
+ if (local_machine && (strcasecmp(local_machine,dp.hostname)!=0)) {
+
+ /* Hostname mismatch, check if one of our IP addresses */
+ if (!ismyip(*interpret_addr2(dp.hostname))) {
+ DEBUG(4,("create_junction: Invalid hostname %s in dfs path %s\n",
+ dp.hostname, pathname));
+ return False;
+ }
+ }
+
+ /* Check for a non-DFS share */
+ if(!lp_msdfs_root(lp_servicenumber(dp.servicename))) {
+ DEBUG(4,("create_junction: %s is not an msdfs root.\n",
+ dp.servicename));
+ return False;
+ }
+
+ pstrcpy(jn->service_name,dp.servicename);
+ pstrcpy(jn->volume_name,dp.reqpath);
+ return True;
+}
+
+/**********************************************************************
+ Forms a valid Unix pathname from the junction
+ **********************************************************************/
+
+static BOOL junction_to_local_path(struct junction_map* jn, char* path,
+ int max_pathlen, struct tcon_context *conn)
+{
+ int snum;
+ pstring conn_path;
+
+ if(!path || !jn)
+ return False;
+
+ snum = lp_servicenumber(jn->service_name);
+ if(snum < 0)
+ return False;
+
+ safe_strcpy(path, lp_pathname(snum), max_pathlen-1);
+ safe_strcat(path, "/", max_pathlen-1);
+ strlower(jn->volume_name);
+ safe_strcat(path, jn->volume_name, max_pathlen-1);
+
+ pstrcpy(conn_path, lp_pathname(snum));
+ if (!create_conn_struct(conn, snum, conn_path))
+ return False;
+
+ return True;
+}
+
+BOOL create_msdfs_link(struct junction_map* jn, BOOL exists)
+{
+ pstring path;
+ pstring msdfs_link;
+ struct tcon_context conns;
+ struct tcon_context *conn = &conns;
+ int i=0;
+ BOOL insert_comma = False;
+
+ if(!junction_to_local_path(jn, path, sizeof(path), conn))
+ return False;
+
+ /* form the msdfs_link contents */
+ pstrcpy(msdfs_link, "msdfs:");
+ for(i=0; i<jn->referral_count; i++) {
+ char* refpath = jn->referral_list[i].alternate_path;
+
+ trim_string(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(conn->vfs_ops.unlink(conn,path)!=0)
+ return False;
+
+ if(conn->vfs_ops.symlink(conn, msdfs_link, path) < 0) {
+ DEBUG(1,("create_msdfs_link: symlink failed %s -> %s\nError: %s\n",
+ path, msdfs_link, strerror(errno)));
+ return False;
+ }
+ return True;
+}
+
+BOOL remove_msdfs_link(struct junction_map* jn)
+{
+ pstring path;
+ struct tcon_context conns;
+ struct tcon_context *conn = &conns;
+
+ if(!junction_to_local_path(jn, path, sizeof(path), conn))
+ return False;
+
+ if(conn->vfs_ops.unlink(conn, path)!=0)
+ return False;
+
+ return True;
+}
+
+static BOOL form_junctions(int snum, struct junction_map* jn, int* jn_count)
+{
+ int cnt = *jn_count;
+ DIR *dirp;
+ char* dname;
+ pstring connect_path;
+ char* service_name = lp_servicename(snum);
+ struct tcon_context conns;
+ struct tcon_context *conn = &conns;
+ struct referral *ref = NULL;
+
+ pstrcpy(connect_path,lp_pathname(snum));
+
+ if(*connect_path == '\0')
+ return False;
+
+ /*
+ * Fake up a connection struct for the VFS layer.
+ */
+
+ if (!create_conn_struct(conn, snum, connect_path))
+ return False;
+
+ /* form a junction for the msdfs root - convention
+ DO NOT REMOVE THIS: NT clients will not work with us
+ if this is not present
+ */
+ pstrcpy(jn[cnt].service_name, service_name);
+ jn[cnt].volume_name[0] = '\0';
+ jn[cnt].referral_count = 1;
+
+ ref = jn[cnt].referral_list
+ = (struct referral*) malloc(sizeof(struct referral));
+ if (jn[cnt].referral_list == NULL) {
+ DEBUG(0, ("Malloc failed!\n"));
+ return False;
+ }
+
+ ref->proximity = 0;
+ ref->ttl = REFERRAL_TTL;
+ if (*lp_msdfs_proxy(snum) != '\0') {
+ pstrcpy(ref->alternate_path, lp_msdfs_proxy(snum));
+ *jn_count = ++cnt;
+ return True;
+ }
+
+ slprintf(ref->alternate_path, sizeof(pstring)-1,
+ "\\\\%s\\%s", local_machine, service_name);
+ cnt++;
+
+ /* Now enumerate all dfs links */
+ dirp = conn->vfs_ops.opendir(conn, connect_path);
+ if(!dirp)
+ return False;
+
+ while((dname = vfs_readdirname(conn, dirp)) != NULL) {
+ pstring pathreal;
+
+ pstrcpy(pathreal, connect_path);
+ pstrcat(pathreal, "/");
+ pstrcat(pathreal, dname);
+
+ if (is_msdfs_link(conn, pathreal, &(jn[cnt].referral_list),
+ &(jn[cnt].referral_count), NULL)) {
+ pstrcpy(jn[cnt].service_name, service_name);
+ pstrcpy(jn[cnt].volume_name, dname);
+ cnt++;
+ }
+ }
+
+ conn->vfs_ops.closedir(conn,dirp);
+ *jn_count = cnt;
+ return True;
+}
+
+int enum_msdfs_links(struct junction_map* jn)
+{
+ int i=0;
+ int jn_count = 0;
+
+ if(!lp_host_msdfs())
+ return -1;
+
+ for(i=0;*lp_servicename(i);i++) {
+ if(lp_msdfs_root(i))
+ form_junctions(i,jn,&jn_count);
+ }
+ return jn_count;
+}
+