diff options
Diffstat (limited to 'source3/msdfs')
| -rw-r--r-- | source3/msdfs/msdfs.c | 618 |
1 files changed, 379 insertions, 239 deletions
diff --git a/source3/msdfs/msdfs.c b/source3/msdfs/msdfs.c index 5ddf7f84f8..3e66c1c10c 100644 --- a/source3/msdfs/msdfs.c +++ b/source3/msdfs/msdfs.c @@ -1,5 +1,6 @@ /* - Unix SMB/CIFS implementation. + Unix SMB/Netbios implementation. + Version 3.0 MSDfs services for Samba Copyright (C) Shirish Kalele 2000 @@ -16,25 +17,16 @@ 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 pstring global_myname; - -/********************************************************************** - Create a tcon relative path from a dfs_path structure - **********************************************************************/ - -static void create_nondfs_path(char* pathname, struct dfs_path* pdp) -{ - pstrcpy(pathname,pdp->volumename); - pstrcat(pathname,"\\"); - pstrcat(pathname,pdp->restofthepath); -} +extern fstring local_machine; +extern uint32 global_client_caps; /********************************************************************** - Parse the pathname of the form \hostname\service\volume\restofthepath + Parse the pathname of the form \hostname\service\reqpath into the dfs_path structure **********************************************************************/ @@ -53,7 +45,7 @@ static BOOL parse_dfs_path(char* pathname, struct dfs_path* pdp) /* now tokenize */ /* parse out hostname */ - p = strchr_m(temp,'\\'); + p = strchr(temp,'\\'); if(p == NULL) return False; *p = '\0'; @@ -62,29 +54,25 @@ static BOOL parse_dfs_path(char* pathname, struct dfs_path* pdp) /* parse out servicename */ temp = p+1; - p = strchr_m(temp,'\\'); + 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)); - /* parse out volumename */ - temp = p+1; - p = strchr_m(temp,'\\'); - if(p == NULL) { - pstrcpy(pdp->volumename,temp); - return True; + /* rest is reqpath */ + pstrcpy(pdp->reqpath, p+1); + p = pdp->reqpath; + while (*p) { + if (*p == '\\') *p = '/'; + p++; } - *p = '\0'; - pstrcpy(pdp->volumename,temp); - DEBUG(10,("volumename: %s\n",pdp->volumename)); - /* remaining path .. */ - pstrcpy(pdp->restofthepath,p+1); - DEBUG(10,("rest of the path: %s\n",pdp->restofthepath)); + DEBUG(10,("rest of the path: %s\n",pdp->reqpath)); return True; } @@ -97,74 +85,22 @@ static BOOL create_conn_struct( connection_struct *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: vfs init failed.\n")); + DEBUG(0,("create_conn_struct: smbd_vfs_init failed.\n")); return False; } return True; } -/********************************************************************** - Forms a valid Unix pathname from the junction - **********************************************************************/ - -static BOOL form_path_from_junction(struct junction_map* jn, char* path, int max_pathlen, - connection_struct *conn) -{ - int snum; - - 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); - - if (!create_conn_struct(conn, snum, path)) - return False; - - return True; -} - -/********************************************************************** - Creates a junction structure from the 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 : check hostname is the first token */ - if(global_myname && (strcasecmp(global_myname,dp.hostname)!=0)) { - 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.volumename); - 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) +static BOOL parse_symlink(char* buf,struct referral** preflist, + int* refcount) { pstring temp; char* prot; @@ -176,11 +112,11 @@ static BOOL parse_symlink(char* buf,struct referral** preflist, int* refcount) prot = strtok(temp,":"); - if(!strequal(prot, "msdfs")) + if (!strequal(prot, "msdfs")) return False; - /* It's an msdfs referral */ - if(!preflist) + /* No referral list requested. Just yes/no. */ + if (!preflist) return True; /* parse out the alternate paths */ @@ -194,10 +130,10 @@ static BOOL parse_symlink(char* buf,struct referral** preflist, int* refcount) 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_m(alt_path[i],'/'); + char* p = strchr(alt_path[i],'/'); if(p) *p = '\\'; @@ -217,134 +153,260 @@ static BOOL parse_symlink(char* buf,struct referral** preflist, int* refcount) /********************************************************************** Returns true if the unix path is a valid msdfs symlink **********************************************************************/ - -BOOL is_msdfs_link(connection_struct* conn, char* path) +BOOL is_msdfs_link(connection_struct* 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) + if (!path || !conn) return False; strlower(path); - if(conn->vfs_ops.lstat(conn,path,&st) != 0) { + 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(st.st_mode)) { + 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) + 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, NULL, NULL)) + if (parse_symlink(referral, reflistp, refcnt)) return True; } return False; } -/********************************************************************** - Fills in the junction_map struct with the referrals from the - symbolic link - **********************************************************************/ - -BOOL get_referred_path(struct junction_map* junction) -{ - pstring path; - pstring buf; - SMB_STRUCT_STAT st; - connection_struct conns; - connection_struct *conn = &conns; +/***************************************************************** + Used by other functions to decide if a dfs path is remote, +and to get the list of referred locations for that remote path. - if(!form_path_from_junction(junction, path, sizeof(path), conn)) +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, + connection_struct* 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 connection_struct*!\n")); return False; + } - DEBUG(5,("get_referred_path: lstat target: %s\n", path)); - - if(conn->vfs_ops.lstat(conn,path,&st) != 0) { - DEBUG(5,("get_referred_path: %s does not exist.\n",path)); + if (dp->reqpath[0] == '\0') { + if (self_referralp) { + DEBUG(6,("resolve_dfs_path: self-referral. returning False\n")); + *self_referralp = True; + } return False; } - - if(S_ISLNK(st.st_mode)) { - /* open the link and read it to get the dfs referral */ - int linkcnt = 0; - linkcnt = conn->vfs_ops.readlink(conn, path, buf, sizeof(buf)); - buf[linkcnt] = '\0'; - DEBUG(5,("get_referred_path: Referral: %s\n",buf)); - if(parse_symlink(buf, &junction->referral_list, &junction->referral_count)) + + /* 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; + safe_strcpy(buf, dfspath, sizeof(buf)); + 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 given pathname is Dfs and if it should be redirected -Converts pathname to non-dfs format if Dfs redirection not required -**************************************************************/ - -BOOL dfs_redirect(char* pathname, connection_struct* conn) +/***************************************************************** + 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(char* pathname, connection_struct* conn, + BOOL findfirst_flag) { struct dfs_path dp; - pstring temp; - fstring path; - - pstrcpy(temp,pathname); - - if(!lp_msdfs_root(SNUM(conn)) ) + + if (!conn || !pathname) return False; - parse_dfs_path(pathname,&dp); + parse_dfs_path(pathname, &dp); - if(global_myname && (strcasecmp(global_myname,dp.hostname)!=0)) + /* 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; - /* check if need to redirect */ - fstrcpy(path, conn->connectpath); - fstrcat(path, "/"); - fstrcat(path, dp.volumename); - if(is_msdfs_link(conn, path)) { - DEBUG(4,("dfs_redirect: Redirecting %s\n",temp)); + if (resolve_dfs_path(pathname, &dp, conn, findfirst_flag, + NULL, NULL, NULL, NULL)) { + DEBUG(3,("dfs_redirect: Redirecting %s\n", pathname)); return True; } else { - create_nondfs_path(pathname,&dp); - DEBUG(4,("dfs_redirect: Not redirecting %s. Converted to non-dfs pathname \'%s\'\n", - temp,pathname)); + 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; } -/* - Special DFS redirect call for findfirst's. - If the findfirst is for the dfs junction, then no redirection, - if it is for the underlying directory contents, redirect. - */ - -BOOL dfs_findfirst_redirect(char* pathname, connection_struct* conn) +/********************************************************************** + 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; - - pstring temp; - pstrcpy(temp,pathname); + struct connection_struct conns; + struct connection_struct* 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); - /* Is the path Dfs-redirectable? */ - if(!dfs_redirect(temp,conn)) { - pstrcpy(pathname,temp); + /* 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; + } } - parse_dfs_path(pathname,&dp); - DEBUG(8,("dfs_findfirst_redirect: path %s is in Dfs. dp.restofthepath=.%s.\n", - pathname,dp.restofthepath)); - if(!(*(dp.restofthepath))) { - create_nondfs_path(pathname,&dp); + 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 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; @@ -352,6 +414,7 @@ BOOL dfs_findfirst_redirect(char* pathname, connection_struct* conn) static int setup_ver2_dfs_referral(char* pathname, char** ppdata, struct junction_map* junction, + int consumedcnt, BOOL self_referral) { char* pdata = *ppdata; @@ -366,10 +429,10 @@ static int setup_ver2_dfs_referral(char* pathname, char** ppdata, DEBUG(10,("setting up version2 referral\nRequested path:\n")); - requestedpathlen = rpcstr_push(uni_requestedpath, pathname, -1, - STR_TERMINATE); + requestedpathlen = rpcstr_push(uni_requestedpath, pathname, -1, + STR_TERMINATE); - dump_data(10,(const char *)uni_requestedpath,requestedpathlen); + dump_data(10, (const char *) uni_requestedpath,requestedpathlen); DEBUG(10,("ref count = %u\n",junction->referral_count)); @@ -398,15 +461,15 @@ static int setup_ver2_dfs_referral(char* pathname, char** ppdata, if(pdata == NULL) { DEBUG(0,("malloc failed for Realloc!\n")); return -1; - } - else *ppdata = pdata; + } 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,requestedpathlen-2); /* path consumed */ + 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); @@ -432,8 +495,9 @@ static int setup_ver2_dfs_referral(char* pathname, char** ppdata, 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); + unilen = rpcstr_push(pdata+uni_curroffset, ref->alternate_path, + -1, STR_UNICODE); + SSVAL(pdata,offset+20,uni_curroffset-offset); uni_curroffset += unilen; @@ -441,12 +505,12 @@ static int setup_ver2_dfs_referral(char* pathname, char** ppdata, } /* add in the unexplained 22 (0x16) bytes at the end */ memset(pdata+uni_curroffset,'\0',0x16); - SAFE_FREE(junction->referral_list); 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; @@ -461,9 +525,9 @@ static int setup_ver3_dfs_referral(char* pathname, char** ppdata, DEBUG(10,("setting up version3 referral\n")); - reqpathlen = rpcstr_push(uni_reqpath, pathname, -1, STR_TERMINATE); - - dump_data(10,(const char *)uni_reqpath,reqpathlen); + 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; @@ -478,12 +542,12 @@ static int setup_ver3_dfs_referral(char* pathname, char** ppdata, if(pdata == NULL) { DEBUG(0,("version3 referral setup: malloc failed for Realloc!\n")); return -1; - } - else *ppdata = pdata; - + } else + *ppdata = pdata; + /* create the header */ - SSVAL(pdata,0,reqpathlen-2); /* path consumed */ - SSVAL(pdata,2,junction->referral_count); /* number of referral in this pkt */ + 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 @@ -511,9 +575,8 @@ static int setup_ver3_dfs_referral(char* pathname, char** ppdata, 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); + 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); @@ -521,7 +584,6 @@ static int setup_ver3_dfs_referral(char* pathname, char** ppdata, uni_curroffset += unilen; offset += VERSION3_REFERRAL_SIZE; } - SAFE_FREE(junction->referral_list); return reply_size; } @@ -532,43 +594,43 @@ static int setup_ver3_dfs_referral(char* pathname, char** ppdata, int setup_dfs_referral(char* pathname, int max_referral_level, char** ppdata) { struct junction_map junction; - - BOOL self_referral; - + int consumedcnt; + BOOL self_referral = False; + pstring buf; int reply_size = 0; + char *pathnamep = pathname; ZERO_STRUCT(junction); - if(!create_junction(pathname, &junction)) + /* get the junction entry */ + if (!pathnamep) return -1; - /* get the junction entry */ - if(!get_referred_path(&junction)) { - - /* refer the same pathname, create a standard referral struct */ - struct referral* ref; - self_referral = True; - junction.referral_count = 1; - if((ref = (struct referral*) malloc(sizeof(struct referral))) == NULL) { - DEBUG(0,("malloc failed for referral\n")); - return -1; - } - - pstrcpy(ref->alternate_path,pathname); - ref->proximity = 0; - ref->ttl = REFERRAL_TTL; - junction.referral_list = ref; - } else { - self_referral = False; + /* 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++; + + safe_strcpy(buf, pathnamep, sizeof(buf)); + 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):",pathname); + 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) @@ -577,12 +639,16 @@ int setup_dfs_referral(char* pathname, int max_referral_level, char** ppdata) switch(max_referral_level) { case 2: { - reply_size = setup_ver2_dfs_referral(pathname, ppdata, &junction, self_referral); + 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(pathname, ppdata, &junction, self_referral); + reply_size = setup_ver3_dfs_referral(pathnamep, ppdata, &junction, + consumedcnt, self_referral); + SAFE_FREE(junction.referral_list); break; } default: @@ -601,6 +667,67 @@ int setup_dfs_referral(char* pathname, int max_referral_level, char** ppdata) 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, connection_struct *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; @@ -608,8 +735,9 @@ BOOL create_msdfs_link(struct junction_map* jn, BOOL exists) connection_struct conns; connection_struct *conn = &conns; int i=0; + BOOL insert_comma = False; - if(!form_path_from_junction(jn, path, sizeof(path), conn)) + if(!junction_to_local_path(jn, path, sizeof(path), conn)) return False; /* form the msdfs_link contents */ @@ -618,13 +746,18 @@ BOOL create_msdfs_link(struct junction_map* jn, BOOL exists) char* refpath = jn->referral_list[i].alternate_path; trim_string(refpath, "\\", "\\"); - if(*refpath == '\0') + if(*refpath == '\0') { + if (i == 0) + insert_comma = False; continue; - - if(i>0) + } + 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)); @@ -647,7 +780,7 @@ BOOL remove_msdfs_link(struct junction_map* jn) connection_struct conns; connection_struct *conn = &conns; - if(!form_path_from_junction(jn, path, sizeof(path), conn)) + if(!junction_to_local_path(jn, path, sizeof(path), conn)) return False; if(conn->vfs_ops.unlink(conn, path)!=0) @@ -678,44 +811,50 @@ static BOOL form_junctions(int snum, struct junction_map* jn, int* jn_count) if (!create_conn_struct(conn, snum, connect_path)) return False; - /* form a junction for the msdfs root - convention */ - /* - pstrpcy(jn[cnt].service_name, service_name); + { + /* form a junction for the msdfs root - convention + DO NOT REMOVE THIS: NT clients will not work with us + if this is not present + */ + struct referral *ref = NULL; + pstring alt_path; + pstrcpy(jn[cnt].service_name, service_name); jn[cnt].volume_name[0] = '\0'; jn[cnt].referral_count = 1; - - slprintf(alt_path,sizeof(alt_path)-1"\\\\%s\\%s", global_myname, service_name); - jn[cnt].referral_l - */ + + slprintf(alt_path,sizeof(alt_path)-1,"\\\\%s\\%s", + local_machine, service_name); + ref = jn[cnt].referral_list = (struct referral*) malloc(sizeof(struct referral)); + if (jn[cnt].referral_list == NULL) { + DEBUG(0, ("Malloc failed!\n")); + return False; + } + + safe_strcpy(ref->alternate_path, alt_path, sizeof(pstring)); + ref->proximity = 0; + ref->ttl = REFERRAL_TTL; + cnt++; + } dirp = conn->vfs_ops.opendir(conn, connect_path); if(!dirp) return False; while((dname = vfs_readdirname(conn, dirp)) != NULL) { - SMB_STRUCT_STAT st; pstring pathreal; - fstring buf; - int buflen = 0; + pstrcpy(pathreal, connect_path); pstrcat(pathreal, "/"); pstrcat(pathreal, dname); - if(conn->vfs_ops.lstat(conn,pathreal,&st) != 0) { - DEBUG(4,("lstat error for %s: %s\n",pathreal, strerror(errno))); - continue; - } - if(S_ISLNK(st.st_mode)) { - buflen = conn->vfs_ops.readlink(conn, pathreal, buf, sizeof(fstring)); - buf[buflen] = '\0'; - if(parse_symlink(buf, &(jn[cnt].referral_list), &(jn[cnt].referral_count))) { - pstrcpy(jn[cnt].service_name, service_name); - pstrcpy(jn[cnt].volume_name, dname); - cnt++; - } + 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; @@ -735,3 +874,4 @@ int enum_msdfs_links(struct junction_map* jn) } return jn_count; } + |