/* Unix SMB/Netbios implementation. Version 1.9. Main SMB server routines Copyright (C) Andrew Tridgell 1992-1995 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" #include "trans2.h" pstring servicesf = CONFIGFILE; extern pstring debugf; extern pstring sesssetup_user; char *InBuffer = NULL; char *OutBuffer = NULL; char *last_inbuf = NULL; BOOL share_mode_pending = False; /* the last message the was processed */ int last_message = -1; /* a useful macro to debug the last message processed */ #define LAST_MESSAGE() smb_fn_name(last_message) extern pstring scope; extern int DEBUGLEVEL; extern int case_default; extern BOOL case_sensitive; extern BOOL case_preserve; extern BOOL use_mangled_map; extern BOOL short_case_preserve; extern BOOL case_mangle; extern time_t smb_last_time; extern pstring user_socket_options; connection_struct Connections[MAX_CONNECTIONS]; files_struct Files[MAX_OPEN_FILES]; extern int Protocol; int maxxmit = BUFFER_SIZE; int chain_size = 0; /* a fnum to use when chaining */ int chain_fnum = -1; /* number of open connections */ static int num_connections_open = 0; extern fstring remote_machine; /* these can be set by some functions to override the error codes */ int unix_ERR_class=SUCCESS; int unix_ERR_code=0; extern int extra_time_offset; extern pstring myhostname; static int find_free_connection(int hash); /* for readability... */ #define IS_DOS_READONLY(test_mode) (((test_mode) & aRONLY) != 0) #define IS_DOS_DIR(test_mode) (((test_mode) & aDIR) != 0) #define IS_DOS_ARCHIVE(test_mode) (((test_mode) & aARCH) != 0) #define IS_DOS_SYSTEM(test_mode) (((test_mode) & aSYSTEM) != 0) #define IS_DOS_HIDDEN(test_mode) (((test_mode) & aHIDDEN) != 0) /**************************************************************************** change a dos mode to a unix mode base permission for files: everybody gets read bit set dos readonly is represented in unix by removing everyone's write bit dos archive is represented in unix by the user's execute bit dos system is represented in unix by the group's execute bit dos hidden is represented in unix by the other's execute bit base permission for directories: dos directory is represented in unix by unix's dir bit and the exec bit ****************************************************************************/ mode_t unix_mode(int cnum,int dosmode) { mode_t result = (S_IRUSR | S_IRGRP | S_IROTH); if ( !IS_DOS_READONLY(dosmode) ) result |= (S_IWUSR | S_IWGRP | S_IWOTH); if (IS_DOS_DIR(dosmode)) result |= (S_IFDIR | S_IXUSR | S_IXGRP | S_IXOTH | S_IWUSR); if (MAP_ARCHIVE(cnum) && IS_DOS_ARCHIVE(dosmode)) result |= S_IXUSR; if (MAP_SYSTEM(cnum) && IS_DOS_SYSTEM(dosmode)) result |= S_IXGRP; if (MAP_HIDDEN(cnum) && IS_DOS_HIDDEN(dosmode)) result |= S_IXOTH; result &= CREATE_MODE(cnum); return(result); } /**************************************************************************** change a unix mode to a dos mode ****************************************************************************/ int dos_mode(int cnum,char *path,struct stat *sbuf) { int result = 0; extern struct current_user current_user; if (CAN_WRITE(cnum) && !lp_alternate_permissions(SNUM(cnum))) { if (!((sbuf->st_mode & S_IWOTH) || Connections[cnum].admin_user || ((sbuf->st_mode & S_IWUSR) && current_user.uid==sbuf->st_uid) || ((sbuf->st_mode & S_IWGRP) && in_group(sbuf->st_gid,current_user.gid, current_user.ngroups,current_user.igroups)))) result |= aRONLY; } else { if ((sbuf->st_mode & S_IWUSR) == 0) result |= aRONLY; } if ((sbuf->st_mode & S_IXUSR) != 0) result |= aARCH; if (MAP_SYSTEM(cnum) && ((sbuf->st_mode & S_IXGRP) != 0)) result |= aSYSTEM; if (MAP_HIDDEN(cnum) && ((sbuf->st_mode & S_IXOTH) != 0)) result |= aHIDDEN; if (S_ISDIR(sbuf->st_mode)) result = aDIR | (result & aRONLY); #if LINKS_READ_ONLY if (S_ISLNK(sbuf->st_mode) && S_ISDIR(sbuf->st_mode)) result |= aRONLY; #endif /* hide files with a name starting with a . */ if (lp_hide_dot_files(SNUM(cnum))) { char *p = strrchr(path,'/'); if (p) p++; else p = path; if (p[0] == '.' && p[1] != '.' && p[1] != 0) result |= aHIDDEN; } return(result); } /******************************************************************* chmod a file - but preserve some bits ********************************************************************/ int dos_chmod(int cnum,char *fname,int dosmode,struct stat *st) { struct stat st1; int mask=0; int tmp; int unixmode; if (!st) { st = &st1; if (sys_stat(fname,st)) return(-1); } if (S_ISDIR(st->st_mode)) dosmode |= aDIR; if (dos_mode(cnum,fname,st) == dosmode) return(0); unixmode = unix_mode(cnum,dosmode); /* preserve the s bits */ mask |= (S_ISUID | S_ISGID); /* preserve the t bit */ #ifdef S_ISVTX mask |= S_ISVTX; #endif /* possibly preserve the x bits */ if (!MAP_ARCHIVE(cnum)) mask |= S_IXUSR; if (!MAP_SYSTEM(cnum)) mask |= S_IXGRP; if (!MAP_HIDDEN(cnum)) mask |= S_IXOTH; unixmode |= (st->st_mode & mask); /* if we previously had any r bits set then leave them alone */ if ((tmp = st->st_mode & (S_IRUSR|S_IRGRP|S_IROTH))) { unixmode &= ~(S_IRUSR|S_IRGRP|S_IROTH); unixmode |= tmp; } /* if we previously had any w bits set then leave them alone if the new mode is not rdonly */ if (!IS_DOS_READONLY(dosmode) && (tmp = st->st_mode & (S_IWUSR|S_IWGRP|S_IWOTH))) { unixmode &= ~(S_IWUSR|S_IWGRP|S_IWOTH); unixmode |= tmp; } return(chmod(fname,unixmode)); } /**************************************************************************** check if two filenames are equal this needs to be careful about whether we are case sensitive ****************************************************************************/ static BOOL fname_equal(char *name1, char *name2) { int l1 = strlen(name1); int l2 = strlen(name2); /* handle filenames ending in a single dot */ if (l1-l2 == 1 && name1[l1-1] == '.' && lp_strip_dot()) { BOOL ret; name1[l1-1] = 0; ret = fname_equal(name1,name2); name1[l1-1] = '.'; return(ret); } if (l2-l1 == 1 && name2[l2-1] == '.' && lp_strip_dot()) { BOOL ret; name2[l2-1] = 0; ret = fname_equal(name1,name2); name2[l2-1] = '.'; return(ret); } /* now normal filename handling */ if (case_sensitive) return(strcmp(name1,name2) == 0); return(strequal(name1,name2)); } /**************************************************************************** mangle the 2nd name and check if it is then equal to the first name ****************************************************************************/ static BOOL mangled_equal(char *name1, char *name2) { pstring tmpname; if (is_8_3(name2)) return(False); strcpy(tmpname,name2); mangle_name_83(tmpname); return(strequal(name1,tmpname)); } /**************************************************************************** scan a directory to find a filename, matching without case sensitivity If the name looks like a mangled name then try via the mangling functions ****************************************************************************/ static BOOL scan_directory(char *path, char *name,int snum,BOOL docache) { void *cur_dir; char *dname; BOOL mangled; pstring name2; mangled = is_mangled(name); /* handle null paths */ if (*path == 0) path = "."; if (docache && (dname = DirCacheCheck(path,name,snum))) { strcpy(name, dname); return(True); } if (mangled) check_mangled_stack(name); /* open the directory */ if (!(cur_dir = OpenDir(path))) { DEBUG(3,("scan dir didn't open dir [%s]\n",path)); return(False); } /* now scan for matching names */ while ((dname = ReadDirName(cur_dir))) { if (*dname == '.' && (strequal(dname,".") || strequal(dname,".."))) continue; strcpy(name2,dname); if (!name_map_mangle(name2,False,snum)) continue; if ((mangled && mangled_equal(name,name2)) || fname_equal(name, name2)) { /* we've found the file, change it's name and return */ if (docache) DirCacheAdd(path,name,dname,snum); strcpy(name, dname); CloseDir(cur_dir); return(True); } } CloseDir(cur_dir); return(False); } /**************************************************************************** This routine is called to convert names from the dos namespace to unix namespace. It needs to handle any case conversions, mangling, format changes etc. We assume that we have already done a chdir() to the right "root" directory for this service. The function will return False if some part of the name except for the last part cannot be resolved ****************************************************************************/ BOOL unix_convert(char *name,int cnum) { struct stat st; char *start, *end; pstring dirpath; *dirpath = 0; /* convert to basic unix format - removing \ chars and cleaning it up */ unix_format(name); unix_clean_name(name); if (!case_sensitive && (!case_preserve || (is_8_3(name) && !short_case_preserve))) strnorm(name); /* names must be relative to the root of the service - trim any leading /. also trim trailing /'s */ trim_string(name,"/","/"); /* check if it's a printer file */ if (Connections[cnum].printer) { if ((! *name) || strchr(name,'/') || !is_8_3(name)) { char *s; fstring name2; sprintf(name2,"%.6s.XXXXXX",remote_machine); /* sanitise the name */ for (s=name2 ; *s ; s++) if (!issafe(*s)) *s = '_'; strcpy(name,(char *)mktemp(name2)); } return(True); } /* stat the name - if it exists then we are all done! */ if (sys_stat(name,&st) == 0) return(True); DEBUG(5,("unix_convert(%s,%d)\n",name,cnum)); /* a special case - if we don't have any mangling chars and are case sensitive then searching won't help */ if (case_sensitive && !is_mangled(name) && !lp_strip_dot() && !use_mangled_map) return(False); /* now we need to recursively match the name against the real directory structure */ start = name; while (strncmp(start,"./",2) == 0) start += 2; /* now match each part of the path name separately, trying the names as is first, then trying to scan the directory for matching names */ for (;start;start = (end?end+1:(char *)NULL)) { /* pinpoint the end of this section of the filename */ end = strchr(start, '/'); /* chop the name at this point */ if (end) *end = 0; /* check if the name exists up to this point */ if (sys_stat(name, &st) == 0) { /* it exists. it must either be a directory or this must be the last part of the path for it to be OK */ if (end && !(st.st_mode & S_IFDIR)) { /* an intermediate part of the name isn't a directory */ DEBUG(5,("Not a dir %s\n",start)); *end = '/'; return(False); } } else { pstring rest; *rest = 0; /* remember the rest of the pathname so it can be restored later */ if (end) strcpy(rest,end+1); /* try to find this part of the path in the directory */ if (strchr(start,'?') || strchr(start,'*') || !scan_directory(dirpath, start, SNUM(cnum), end?True:False)) { if (end) { /* an intermediate part of the name can't be found */ DEBUG(5,("Intermediate not found %s\n",start)); *end = '/'; return(False); } /* just the last part of the name doesn't exist */ /* we may need to strupper() or strlower() it in case this conversion is being used for file creation purposes */ /* if the filename is of mixed case then don't normalise it */ if (!case_preserve && (!strhasupper(start) || !strhaslower(start))) strnorm(start); /* check on the mangled stack to see if we can recover the base of the filename */ if (is_mangled(start)) check_mangled_stack(start); DEBUG(5,("New file %s\n",start)); return(True); } /* restore the rest of the string */ if (end) { strcpy(start+strlen(start)+1,rest); end = start + strlen(start); } } /* add to the dirpath that we have resolved so far */ if (*dirpath) strcat(dirpath,"/"); strcat(dirpath,start); /* restore the / that we wiped out earlier */ if (end) *end = '/'; } /* the name has been resolved */ DEBUG(5,("conversion finished %s\n",name)); return(True); } /**************************************************************************** normalise for DOS usage ****************************************************************************/ static void disk_norm(int *bsize,int *dfree,int *dsize) { /* check if the disk is beyond the max disk size */ int maxdisksize = lp_maxdisksize(); if (maxdisksize) { /* convert to blocks - and don't overflow */ maxdisksize = ((maxdisksize*1024)/(*bsize))*1024; if (*dsize > maxdisksize) *dsize = maxdisksize; if (*dfree > maxdisksize) *dfree = maxdisksize-1; /* the -1 should stop applications getting div by 0 errors */ } while (*dfree > WORDMAX || *dsize > WORDMAX || *bsize < 512) { *dfree /= 2; *dsize /= 2; *bsize *= 2; if (*bsize > WORDMAX ) { *bsize = WORDMAX; if (*dsize > WORDMAX) *dsize = WORDMAX; if (*dfree > WORDMAX) *dfree = WORDMAX; break; } } } /**************************************************************************** return number of 1K blocks available on a path and total number ****************************************************************************/ int disk_free(char *path,int *bsize,int *dfree,int *dsize) { char *df_command = lp_dfree_command(); #ifndef NO_STATFS #ifdef USE_STATVFS struct statvfs fs; #else #ifdef ULTRIX struct fs_data fs; #else struct statfs fs; #endif #endif #endif #ifdef QUOTAS if (disk_quotas(path, bsize, dfree, dsize)) { disk_norm(bsize,dfree,dsize); return(((*bsize)/1024)*(*dfree)); } #endif /* possibly use system() to get the result */ if (df_command && *df_command) { int ret; pstring syscmd; pstring outfile; sprintf(outfile,"/tmp/dfree.smb.%d",(int)getpid()); sprintf(syscmd,"%s %s",df_command,path); standard_sub_basic(syscmd); ret = smbrun(syscmd,outfile); DEBUG(3,("Running the command `%s' gave %d\n",syscmd,ret)); { FILE *f = fopen(outfile,"r"); *dsize = 0; *dfree = 0; *bsize = 1024; if (f) { fscanf(f,"%d %d %d",dsize,dfree,bsize); fclose(f); } else DEBUG(0,("Can't open %s\n",outfile)); } unlink(outfile); disk_norm(bsize,dfree,dsize); return(((*bsize)/1024)*(*dfree)); } #ifdef NO_STATFS DEBUG(1,("Warning - no statfs function\n")); return(1); #else #ifdef STATFS4 if (statfs(path,&fs,sizeof(fs),0) != 0) #else #ifdef USE_STATVFS if (statvfs(path, &fs)) #else #ifdef STATFS3 if (statfs(path,&fs,sizeof(fs)) == -1) #else if (statfs(path,&fs) == -1) #endif /* STATFS3 */ #endif /* USE_STATVFS */ #endif /* STATFS4 */ { DEBUG(3,("dfree call failed code errno=%d\n",errno)); *bsize = 1024; *dfree = 1; *dsize = 1; return(((*bsize)/1024)*(*dfree)); } #ifdef ULTRIX *bsize = 1024; *dfree = fs.fd_req.bfree; *dsize = fs.fd_req.btot; #else #ifdef USE_STATVFS *bsize = fs.f_frsize; #else #ifdef USE_F_FSIZE /* eg: osf1 has f_fsize = fundamental filesystem block size, f_bsize = optimal transfer block size (MX: 94-04-19) */ *bsize = fs.f_fsize; #else *bsize = fs.f_bsize; #endif /* STATFS3 */ #endif /* USE_STATVFS */ #ifdef STATFS4 *dfree = fs.f_bfree; #else *dfree = fs.f_bavail; #endif /* STATFS4 */ *dsize = fs.f_blocks; #endif /* ULTRIX */ #if defined(SCO) || defined(ISC) || defined(MIPS) *bsize = 512; #endif /* handle rediculous bsize values - some OSes are broken */ if ((*bsize) < 512 || (*bsize)>0xFFFF) *bsize = 1024; disk_norm(bsize,dfree,dsize); if (*bsize < 256) *bsize = 512; if ((*dsize)<1) { DEBUG(0,("dfree seems to be broken on your system\n")); *dsize = 20*1024*1024/(*bsize); *dfree = MAX(1,*dfree); } return(((*bsize)/1024)*(*dfree)); #endif } /**************************************************************************** wrap it to get filenames right ****************************************************************************/ int sys_disk_free(char *path,int *bsize,int *dfree,int *dsize) { return(disk_free(dos_to_unix(path,False),bsize,dfree,dsize)); } /**************************************************************************** check a filename - possibly caling reducename This is called by every routine before it allows an operation on a filename. It does any final confirmation necessary to ensure that the filename is a valid one for the user to access. ****************************************************************************/ BOOL check_name(char *name,int cnum) { BOOL ret; errno = 0; ret = reduce_name(name,Connections[cnum].connectpath,lp_widelinks(SNUM(cnum))); if (!ret) DEBUG(5,("check_name on %s failed\n",name)); return(ret); } /**************************************************************************** check a filename - possibly caling reducename ****************************************************************************/ static void check_for_pipe(char *fname) { /* special case of pipe opens */ char s[10]; StrnCpy(s,fname,9); strlower(s); if (strstr(s,"pipe/")) { DEBUG(3,("Rejecting named pipe open for %s\n",fname)); unix_ERR_class = ERRSRV; unix_ERR_code = ERRaccess; } } /**************************************************************************** open a file ****************************************************************************/ void open_file(int fnum,int cnum,char *fname1,int flags,int mode) { pstring fname; Files[fnum].open = False; Files[fnum].fd = -1; errno = EPERM; strcpy(fname,fname1); /* check permissions */ if ((flags != O_RDONLY) && !CAN_WRITE(cnum) && !Connections[cnum].printer) { DEBUG(3,("Permission denied opening %s\n",fname)); check_for_pipe(fname); return; } /* this handles a bug in Win95 - it doesn't say to create the file when it should */ if (Connections[cnum].printer) flags |= O_CREAT; /* if (flags == O_WRONLY) DEBUG(3,("Bug in client? Set O_WRONLY without O_CREAT\n")); */ #if UTIME_WORKAROUND /* XXXX - is this OK?? */ /* this works around a utime bug but can cause other problems */ if ((flags & (O_WRONLY|O_RDWR)) && (flags & O_CREAT) && !(flags & O_APPEND)) sys_unlink(fname); #endif Files[fnum].fd = sys_open(fname,flags,mode); if ((Files[fnum].fd>=0) && Connections[cnum].printer && lp_minprintspace(SNUM(cnum))) { pstring dname; int dum1,dum2,dum3; char *p; strcpy(dname,fname); p = strrchr(dname,'/'); if (p) *p = 0; if (sys_disk_free(dname,&dum1,&dum2,&dum3) < lp_minprintspace(SNUM(cnum))) { close(Files[fnum].fd); Files[fnum].fd = -1; sys_unlink(fname); errno = ENOSPC; return; } } /* Fix for files ending in '.' */ if((Files[fnum].fd == -1) && (errno == ENOENT) && (strchr(fname,'.')==NULL)) { strcat(fname,"."); Files[fnum].fd = sys_open(fname,flags,mode); } #if (defined(ENAMETOOLONG) && defined(HAVE_PATHCONF)) if ((Files[fnum].fd == -1) && (errno == ENAMETOOLONG)) { int max_len; char *p = strrchr(fname, '/'); if (p == fname) /* name is "/xxx" */ { max_len = pathconf("/", _PC_NAME_MAX); p++; } else if ((p == NULL) || (p == fname)) { p = fname; max_len = pathconf(".", _PC_NAME_MAX); } else { *p = '\0'; max_len = pathconf(fname, _PC_NAME_MAX); *p = '/'; p++; } if (strlen(p) > max_len) { char tmp = p[max_len]; p[max_len] = '\0'; if ((Files[fnum].fd = sys_open(fname,flags,mode)) == -1) p[max_len] = tmp; } } #endif if (Files[fnum].fd < 0) { DEBUG(3,("Error opening file %s (%s) (flags=%d)\n", fname,strerror(errno),flags)); check_for_pipe(fname); return; } if (Files[fnum].fd >= 0) { struct stat st; Connections[cnum].num_files_open++; fstat(Files[fnum].fd,&st); Files[fnum].mode = st.st_mode; Files[fnum].open_time = time(NULL); Files[fnum].size = 0; Files[fnum].pos = -1; Files[fnum].open = True; Files[fnum].mmap_ptr = NULL; Files[fnum].mmap_size = 0; Files[fnum].can_lock = True; Files[fnum].can_read = ((flags & O_WRONLY)==0); Files[fnum].can_write = ((flags & (O_WRONLY|O_RDWR))!=0); Files[fnum].share_mode = 0; Files[fnum].share_pending = False; Files[fnum].print_file = Connections[cnum].printer; Files[fnum].modified = False; Files[fnum].cnum = cnum; string_set(&Files[fnum].name,fname); Files[fnum].wbmpx_ptr = NULL; /* * If the printer is marked as postscript output a leading * file identifier to ensure the file is treated as a raw * postscript file. * This has a similar effect as CtrlD=0 in WIN.INI file. * tim@fsg.com 09/06/94 */ if (Files[fnum].print_file && POSTSCRIPT(cnum) && Files[fnum].can_write) { DEBUG(3,("Writing postscript line\n")); write_file(fnum,"%!\n",3); } DEBUG(2,("%s %s opened file %s read=%s write=%s (numopen=%d fnum=%d)\n", timestring(),Connections[cnum].user,fname, BOOLSTR(Files[fnum].can_read),BOOLSTR(Files[fnum].can_write), Connections[cnum].num_files_open,fnum)); } #if USE_MMAP /* mmap it if read-only */ if (!Files[fnum].can_write) { Files[fnum].mmap_size = file_size(fname); Files[fnum].mmap_ptr = (char *)mmap(NULL,Files[fnum].mmap_size, PROT_READ,MAP_SHARED,Files[fnum].fd,0); if (Files[fnum].mmap_ptr == (char *)-1 || !Files[fnum].mmap_ptr) { DEBUG(3,("Failed to mmap() %s - %s\n",fname,strerror(errno))); Files[fnum].mmap_ptr = NULL; } } #endif } /******************************************************************* sync a file ********************************************************************/ void sync_file(int fnum) { #ifndef NO_FSYNC fsync(Files[fnum].fd); #endif } /**************************************************************************** run a file if it is a magic script ****************************************************************************/ static void check_magic(int fnum,int cnum) { if (!*lp_magicscript(SNUM(cnum))) return; DEBUG(5,("checking magic for %s\n",Files[fnum].name)); { char *p; if (!(p = strrchr(Files[fnum].name,'/'))) p = Files[fnum].name; else p++; if (!strequal(lp_magicscript(SNUM(cnum)),p)) return; } { int ret; pstring magic_output; pstring fname; strcpy(fname,Files[fnum].name); if (*lp_magicoutput(SNUM(cnum))) strcpy(magic_output,lp_magicoutput(SNUM(cnum))); else sprintf(magic_output,"%s.out",fname); chmod(fname,0755); ret = smbrun(fname,magic_output); DEBUG(3,("Invoking magic command %s gave %d\n",fname,ret)); unlink(fname); } } /**************************************************************************** close a file - possibly invalidating the read prediction ****************************************************************************/ void close_file(int fnum) { int cnum = Files[fnum].cnum; invalidate_read_prediction(Files[fnum].fd); Files[fnum].open = False; Connections[cnum].num_files_open--; if(Files[fnum].wbmpx_ptr) { free((char *)Files[fnum].wbmpx_ptr); Files[fnum].wbmpx_ptr = NULL; } #if USE_MMAP if(Files[fnum].mmap_ptr) { munmap(Files[fnum].mmap_ptr,Files[fnum].mmap_size); Files[fnum].mmap_ptr = NULL; } #endif if (lp_share_modes(SNUM(cnum))) del_share_mode(fnum); close(Files[fnum].fd); /* NT uses smbclose to start a print - weird */ if (Files[fnum].print_file) print_file(fnum); /* check for magic scripts */ check_magic(fnum,cnum); DEBUG(2,("%s %s closed file %s (numopen=%d)\n", timestring(),Connections[cnum].user,Files[fnum].name, Connections[cnum].num_files_open)); } enum {AFAIL,AREAD,AWRITE,AALL}; /******************************************************************* reproduce the share mode access table ********************************************************************/ static int access_table(int new_deny,int old_deny,int old_mode, int share_pid,char *fname) { if (new_deny == DENY_ALL || old_deny == DENY_ALL) return(AFAIL); if (new_deny == DENY_DOS || old_deny == DENY_DOS) { if (old_deny == new_deny && share_pid == getpid()) return(AALL); if (old_mode == 0) return(AREAD); /* the new smbpub.zip spec says that if the file extension is .com, .dll, .exe or .sym then allow the open. I will force it to read-only as this seems sensible although the spec is a little unclear on this. */ if ((fname = strrchr(fname,'.'))) { if (strequal(fname,".com") || strequal(fname,".dll") || strequal(fname,".exe") || strequal(fname,".sym")) return(AREAD); } return(AFAIL); } switch (new_deny) { case DENY_WRITE: if (old_deny==DENY_WRITE && old_mode==0) return(AREAD); if (old_deny==DENY_READ && old_mode==0) return(AWRITE); if (old_deny==DENY_NONE && old_mode==0) return(AALL); return(AFAIL); case DENY_READ: if (old_deny==DENY_WRITE && old_mode==1) return(AREAD); if (old_deny==DENY_READ && old_mode==1) return(AWRITE); if (old_deny==DENY_NONE && old_mode==1) return(AALL); return(AFAIL); case DENY_NONE: if (old_deny==DENY_WRITE) return(AREAD); if (old_deny==DENY_READ) return(AWRITE); if (old_deny==DENY_NONE) return(AALL); return(AFAIL); } return(AFAIL); } /******************************************************************* check if the share mode on a file allows it to be deleted or unlinked return True if sharing doesn't prevent the operation ********************************************************************/ BOOL check_file_sharing(int cnum,char *fname) { int pid=0; int share_mode = get_share_mode_byname(cnum,fname,&pid); if (!pid || !share_mode) return(True); if (share_mode == DENY_DOS) return(pid == getpid()); /* XXXX exactly what share mode combinations should be allowed for deleting/renaming? */ return(False); } /**************************************************************************** C. Hoch 11/22/95 Helper for open_file_shared. Truncate a file after checking locking; close file if locked. **************************************************************************/ static void truncate_unless_locked(int fnum, int cnum) { if (Files[fnum].can_write){ if (is_locked(fnum,cnum,0x3FFFFFFF,0)){ close_file(fnum); errno = EACCES; unix_ERR_class = ERRDOS; unix_ERR_code = ERRlock; } else ftruncate(Files[fnum].fd,0); } } /**************************************************************************** open a file with a share mode ****************************************************************************/ void open_file_shared(int fnum,int cnum,char *fname,int share_mode,int ofun, int mode,int *Access,int *action) { int flags=0; int flags2=0; int deny_mode = (share_mode>>4)&7; struct stat sbuf; BOOL file_existed = file_exist(fname,&sbuf); BOOL fcbopen = False; int share_pid=0; Files[fnum].open = False; Files[fnum].fd = -1; /* this is for OS/2 EAs - try and say we don't support them */ if (strstr(fname,".+,;=[].")) { unix_ERR_class = ERRDOS; unix_ERR_code = ERROR_EAS_NOT_SUPPORTED; return; } if ((ofun & 0x3) == 0 && file_existed) { errno = EEXIST; return; } if (ofun & 0x10) flags2 |= O_CREAT; if ((ofun & 0x3) == 2) flags2 |= O_TRUNC; /* note that we ignore the append flag as append does not mean the same thing under dos and unix */ switch (share_mode&0xF) { case 1: flags = O_WRONLY; break; case 0xF: fcbopen = True; flags = O_RDWR; break; case 2: flags = O_RDWR; break; default: flags = O_RDONLY; break; } if (flags != O_RDONLY && file_existed && (!CAN_WRITE(cnum) || IS_DOS_READONLY(dos_mode(cnum,fname,&sbuf)))) { if (!fcbopen) { errno = EACCES; return; } flags = O_RDONLY; } if (deny_mode > DENY_NONE && deny_mode!=DENY_FCB) { DEBUG(2,("Invalid deny mode %d on file %s\n",deny_mode,fname)); errno = EINVAL; return; } if (deny_mode == DENY_FCB) deny_mode = DENY_DOS; if (lp_share_modes(SNUM(cnum))) { int old_share=0; if (file_existed) old_share = get_share_mode(cnum,&sbuf,&share_pid); if (share_pid) { /* someone else has a share lock on it, check to see if we can too */ int old_open_mode = old_share&0xF; int old_deny_mode = (old_share>>4)&7; if (deny_mode > 4 || old_deny_mode > 4 || old_open_mode > 2) { DEBUG(2,("Invalid share mode (%d,%d,%d) on file %s\n", deny_mode,old_deny_mode,old_open_mode,fname)); errno = EACCES; unix_ERR_class = ERRDOS; unix_ERR_code = ERRbadshare; return; } { int access_allowed = access_table(deny_mode,old_deny_mode,old_open_mode, share_pid,fname); if ((access_allowed == AFAIL) || (access_allowed == AREAD && flags == O_WRONLY) || (access_allowed == AWRITE && flags == O_RDONLY)) { DEBUG(2,("Share violation on file (%d,%d,%d,%d,%s) = %d\n", deny_mode,old_deny_mode,old_open_mode, share_pid,fname, access_allowed)); errno = EACCES; unix_ERR_class = ERRDOS; unix_ERR_code = ERRbadshare; return; } if (access_allowed == AREAD) flags = O_RDONLY; if (access_allowed == AWRITE) flags = O_WRONLY; } } } DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o\n", flags,flags2,mode)); open_file(fnum,cnum,fname,flags|(flags2&~(O_TRUNC)),mode); if (!Files[fnum].open && flags==O_RDWR && errno!=ENOENT && fcbopen) { flags = O_RDONLY; open_file(fnum,cnum,fname,flags,mode); } if (Files[fnum].open) { int open_mode=0; switch (flags) { case O_RDONLY: open_mode = 0; break; case O_RDWR: open_mode = 2; break; case O_WRONLY: open_mode = 1; break; } Files[fnum].share_mode = (deny_mode<<4) | open_mode; Files[fnum].share_pending = True; if (Access) { (*Access) = open_mode; } if (action) { if (file_existed && !(flags2 & O_TRUNC)) *action = 1; if (!file_existed) *action = 2; if (file_existed && (flags2 & O_TRUNC)) *action = 3; } if (!share_pid) share_mode_pending = True; if ((flags2&O_TRUNC) && file_existed) truncate_unless_locked(fnum,cnum); } } /******************************************************************* check for files that we should now set our share modes on ********************************************************************/ static void check_share_modes(void) { int i; for (i=0;i 0) { memcpy(data,Files[fnum].mmap_ptr+pos,num); data += num; pos += num; maxcnt -= num; mincnt = MAX(mincnt-num,0); ret += num; } } #endif if (maxcnt <= 0) return(ret); if (seek_file(fnum,pos) != pos) { DEBUG(3,("Failed to seek to %d\n",pos)); return(ret); } if (maxcnt > 0) ret += read_with_timeout(Files[fnum].fd, data, mincnt, maxcnt, timeout, exact); return(ret); } /**************************************************************************** write to a file ****************************************************************************/ int write_file(int fnum,char *data,int n) { if (!Files[fnum].can_write) { errno = EPERM; return(0); } if (!Files[fnum].modified) { struct stat st; Files[fnum].modified = True; if (fstat(Files[fnum].fd,&st) == 0) { int dosmode = dos_mode(Files[fnum].cnum,Files[fnum].name,&st); if (MAP_ARCHIVE(Files[fnum].cnum) && !IS_DOS_ARCHIVE(dosmode)) { dos_chmod(Files[fnum].cnum,Files[fnum].name,dosmode | aARCH,&st); } } } return(write_data(Files[fnum].fd,data,n)); } /**************************************************************************** load parameters specific to a connection/service ****************************************************************************/ BOOL become_service(int cnum,BOOL do_chdir) { extern char magic_char; static int last_cnum = -1; int snum; if (!OPEN_CNUM(cnum)) { last_cnum = -1; return(False); } Connections[cnum].lastused = smb_last_time; snum = SNUM(cnum); if (do_chdir && ChDir(Connections[cnum].connectpath) != 0 && ChDir(Connections[cnum].origpath) != 0) { DEBUG(0,("%s chdir (%s) failed cnum=%d\n",timestring(), Connections[cnum].connectpath,cnum)); return(False); } if (cnum == last_cnum) return(True); last_cnum = cnum; case_default = lp_defaultcase(snum); case_preserve = lp_preservecase(snum); short_case_preserve = lp_shortpreservecase(snum); case_mangle = lp_casemangle(snum); case_sensitive = lp_casesensitive(snum); magic_char = lp_magicchar(snum); use_mangled_map = (*lp_mangled_map(snum) ? True:False); return(True); } /**************************************************************************** find a service entry ****************************************************************************/ int find_service(char *service) { int iService; string_sub(service,"\\","/"); iService = lp_servicenumber(service); /* now handle the special case of a home directory */ if (iService < 0) { char *phome_dir = get_home_dir(service); DEBUG(3,("checking for home directory %s gave %s\n",service, phome_dir?phome_dir:"(NULL)")); if (phome_dir) { int iHomeService; if ((iHomeService = lp_servicenumber(HOMES_NAME)) >= 0) { lp_add_home(service,iHomeService,phome_dir); iService = lp_servicenumber(service); } } } /* If we still don't have a service, attempt to add it as a printer. */ if (iService < 0) { int iPrinterService; if ((iPrinterService = lp_servicenumber(PRINTERS_NAME)) >= 0) { char *pszTemp; DEBUG(3,("checking whether %s is a valid printer name...\n", service)); pszTemp = PRINTCAP; if ((pszTemp != NULL) && pcap_printername_ok(service, pszTemp)) { DEBUG(3,("%s is a valid printer name\n", service)); DEBUG(3,("adding %s as a printer service\n", service)); lp_add_printer(service,iPrinterService); iService = lp_servicenumber(service); if (iService < 0) DEBUG(0,("failed to add %s as a printer service!\n", service)); } else DEBUG(3,("%s is not a valid printer name\n", service)); } } /* just possibly it's a default service? */ if (iService < 0) { char *defservice = lp_defaultservice(); if (defservice && *defservice && !strequal(defservice,service)) { iService = find_service(defservice); if (iService >= 0) { string_sub(service,"_","/"); iService = lp_add_service(service,iService); } } } if (iService >= 0) if (!VALID_SNUM(iService)) { DEBUG(0,("Invalid snum %d for %s\n",iService,service)); iService = -1; } if (iService < 0) DEBUG(3,("find_service() failed to find service %s\n", service)); return (iService); } /**************************************************************************** create an error packet from a cached error. ****************************************************************************/ int cached_error_packet(char *inbuf,char *outbuf,int fnum,int line) { write_bmpx_struct *wbmpx = Files[fnum].wbmpx_ptr; int32 eclass = wbmpx->wr_errclass; int32 err = wbmpx->wr_error; /* We can now delete the auxiliary struct */ free((char *)wbmpx); Files[fnum].wbmpx_ptr = NULL; return error_packet(inbuf,outbuf,eclass,err,line); } struct { int unixerror; int smbclass; int smbcode; } unix_smb_errmap[] = { {EPERM,ERRDOS,ERRnoaccess}, {EACCES,ERRDOS,ERRnoaccess}, {ENOENT,ERRDOS,ERRbadfile}, {EIO,ERRHRD,ERRgeneral}, {EBADF,ERRSRV,ERRsrverror}, {EINVAL,ERRSRV,ERRsrverror}, {EEXIST,ERRDOS,ERRfilexists}, {ENFILE,ERRDOS,ERRnofids}, {EMFILE,ERRDOS,ERRnofids}, {ENOSPC,ERRHRD,ERRdiskfull}, #ifdef EDQUOT {EDQUOT,ERRHRD,ERRdiskfull}, #endif #ifdef ENOTEMPTY {ENOTEMPTY,ERRDOS,ERRnoaccess}, #endif #ifdef EXDEV {EXDEV,ERRDOS,ERRdiffdevice}, #endif {EROFS,ERRHRD,ERRnowrite}, {0,0,0} }; /**************************************************************************** create an error packet from errno ****************************************************************************/ int unix_error_packet(char *inbuf,char *outbuf,int def_class,uint32 def_code,int line) { int eclass=def_class; int ecode=def_code; int i=0; if (unix_ERR_class != SUCCESS) { eclass = unix_ERR_class; ecode = unix_ERR_code; unix_ERR_class = SUCCESS; unix_ERR_code = 0; } else { while (unix_smb_errmap[i].smbclass != 0) { if (unix_smb_errmap[i].unixerror == errno) { eclass = unix_smb_errmap[i].smbclass; ecode = unix_smb_errmap[i].smbcode; break; } i++; } } return(error_packet(inbuf,outbuf,eclass,ecode,line)); } /**************************************************************************** create an error packet. Normally called using the ERROR() macro ****************************************************************************/ int error_packet(char *inbuf,char *outbuf,int error_class,uint32 error_code,int line) { int outsize = set_message(outbuf,0,0,True); int cmd; cmd = CVAL(inbuf,smb_com); CVAL(outbuf,smb_rcls) = error_class; SSVAL(outbuf,smb_err,error_code); DEBUG(3,("%s error packet at line %d cmd=%d (%s) eclass=%d ecode=%d\n", timestring(), line, (int)CVAL(inbuf,smb_com), smb_fn_name(CVAL(inbuf,smb_com)), error_class, error_code)); if (errno != 0) DEBUG(3,("error string = %s\n",strerror(errno))); return(outsize); } #ifndef SIGCLD_IGNORE /**************************************************************************** this prevents zombie child processes ****************************************************************************/ static int sig_cld() { static int depth = 0; if (depth != 0) { DEBUG(0,("ERROR: Recursion in sig_cld? Perhaps you need `#define USE_WAITPID'?\n")); depth=0; return(0); } depth++; BlockSignals(True); DEBUG(5,("got SIGCLD\n")); #ifdef USE_WAITPID while (waitpid((pid_t)-1,(int *)NULL, WNOHANG) > 0); #endif /* Stop zombies */ /* Stevens, Adv. Unix Prog. says that on system V you must call wait before reinstalling the signal handler, because the kernel calls the handler from within the signal-call when there is a child that has exited. This would lead to an infinite recursion if done vice versa. */ #ifndef DONT_REINSTALL_SIG #ifdef SIGCLD_IGNORE signal(SIGCLD, SIG_IGN); #else signal(SIGCLD, SIGNAL_CAST sig_cld); #endif #endif #ifndef USE_WAITPID while (wait3(WAIT3_CAST1 NULL, WNOHANG, WAIT3_CAST2 NULL) > 0); #endif depth--; BlockSignals(False); return 0; } #endif /**************************************************************************** this is called when the client exits abruptly **************************************************************************/ static int sig_pipe() { exit_server("Got sigpipe\n"); return(0); } /**************************************************************************** open the socket communication ****************************************************************************/ static BOOL open_sockets(BOOL is_daemon,int port) { extern int Client; if (is_daemon) { int s; struct sockaddr addr; int in_addrlen = sizeof(addr); /* Stop zombies */ #ifdef SIGCLD_IGNORE signal(SIGCLD, SIG_IGN); #else signal(SIGCLD, SIGNAL_CAST sig_cld); #endif /* open an incoming socket */ s = open_socket_in(SOCK_STREAM, port, 0); if (s == -1) return(False); /* ready to listen */ if (listen(s, 5) == -1) { DEBUG(0,("listen: %s",strerror(errno))); close(s); return False; } /* now accept incoming connections - forking a new process for each incoming connection */ DEBUG(2,("waiting for a connection\n")); while (1) { Client = accept(s,&addr,&in_addrlen); if (Client == -1 && errno == EINTR) continue; if (Client == -1) { DEBUG(0,("accept: %s",strerror(errno))); return False; } #ifdef NO_FORK_DEBUG #ifndef NO_SIGNAL_TEST signal(SIGPIPE, SIGNAL_CAST sig_pipe); signal(SIGCLD, SIGNAL_CAST SIG_DFL); #endif return True; #else if (Client != -1 && fork()==0) { #ifndef NO_SIGNAL_TEST signal(SIGPIPE, SIGNAL_CAST sig_pipe); signal(SIGCLD, SIGNAL_CAST SIG_DFL); #endif /* close the listening socket */ close(s); /* close our standard file descriptors */ close_low_fds(); set_socket_options(Client,"SO_KEEPALIVE"); set_socket_options(Client,user_socket_options); return True; } close(Client); /* The parent doesn't need this socket */ #endif } } else { /* We will abort gracefully when the client or remote system goes away */ #ifndef NO_SIGNAL_TEST signal(SIGPIPE, SIGNAL_CAST sig_pipe); #endif Client = dup(0); /* close our standard file descriptors */ close_low_fds(); set_socket_options(Client,"SO_KEEPALIVE"); set_socket_options(Client,user_socket_options); } return True; } /**************************************************************************** check if a snum is in use ****************************************************************************/ BOOL snum_used(int snum) { int i; for (i=0;i 16000 || uid < 0 || uid > 16000) DEBUG(0,("This is probably a problem with the account %s\n",user)); } } else { int i,ngroups; int *igroups; gid_t grp = 0; ngroups = getgroups(0,&grp); if (ngroups <= 0) ngroups = 32; igroups = (int *)malloc(sizeof(int)*ngroups); for (i=0;i 0) { /* does getgroups return ints or gid_t ?? */ static BOOL groups_use_ints = True; if (groups_use_ints && ngroups == 1 && SVAL(igroups,2) == 0x4242) groups_use_ints = False; for (i=0;groups_use_ints && iread_only = lp_readonly(snum); { pstring list; StrnCpy(list,lp_readlist(snum),sizeof(pstring)-1); string_sub(list,"%S",service); if (user_in_list(user,list)) pcon->read_only = True; StrnCpy(list,lp_writelist(snum),sizeof(pstring)-1); string_sub(list,"%S",service); if (user_in_list(user,list)) pcon->read_only = False; } /* admin user check */ if (user_in_list(user,lp_admin_users(snum)) && !pcon->read_only) { pcon->admin_user = True; DEBUG(0,("%s logged in as admin user (root privileges)\n",user)); } else pcon->admin_user = False; pcon->force_user = force; pcon->uid = pass->pw_uid; pcon->gid = pass->pw_gid; pcon->num_files_open = 0; pcon->lastused = time(NULL); pcon->service = snum; pcon->used = True; pcon->printer = (strncmp(dev,"LPT",3) == 0); pcon->ipc = (strncmp(dev,"IPC",3) == 0); pcon->dirptr = NULL; string_set(&pcon->dirpath,""); string_set(&pcon->user,user); #if HAVE_GETGRNAM if (*lp_force_group(snum)) { struct group *gptr = (struct group *)getgrnam(lp_force_group(snum)); if (gptr) { pcon->gid = gptr->gr_gid; DEBUG(3,("Forced group %s\n",lp_force_group(snum))); } else DEBUG(1,("Couldn't find group %s\n",lp_force_group(snum))); } #endif if (*lp_force_user(snum)) { struct passwd *pass2; fstring fuser; strcpy(fuser,lp_force_user(snum)); pass2 = (struct passwd *)Get_Pwnam(fuser,True); if (pass2) { pcon->uid = pass2->pw_uid; string_set(&pcon->user,fuser); strcpy(user,fuser); pcon->force_user = True; DEBUG(3,("Forced user %s\n",fuser)); } else DEBUG(1,("Couldn't find user %s\n",fuser)); } { pstring s; strcpy(s,lp_pathname(snum)); standard_sub(cnum,s); string_set(&pcon->connectpath,s); DEBUG(3,("Connect path is %s\n",s)); } /* groups stuff added by ih */ pcon->ngroups = 0; pcon->groups = NULL; if (!IS_IPC(cnum)) { /* Find all the groups this uid is in and store them. Used by become_user() */ setup_groups(pcon->user,pcon->uid,pcon->gid,&pcon->ngroups,&pcon->igroups,&pcon->groups); /* check number of connections */ if (!claim_connection(cnum, lp_servicename(SNUM(cnum)), lp_max_connections(SNUM(cnum)),False)) { DEBUG(1,("too many connections - rejected\n")); return(-8); } if (lp_status(SNUM(cnum))) claim_connection(cnum,"STATUS.",MAXSTATUS,first_connection); first_connection = False; } /* IS_IPC */ pcon->open = True; /* execute any "root preexec = " line */ if (*lp_rootpreexec(SNUM(cnum))) { pstring cmd; strcpy(cmd,lp_rootpreexec(SNUM(cnum))); standard_sub(cnum,cmd); DEBUG(5,("cmd=%s\n",cmd)); smbrun(cmd,NULL); } if (!become_user(cnum,pcon->uid)) { DEBUG(0,("Can't become connected user!\n")); pcon->open = False; if (!IS_IPC(cnum)) { yield_connection(cnum, lp_servicename(SNUM(cnum)), lp_max_connections(SNUM(cnum))); if (lp_status(SNUM(cnum))) yield_connection(cnum,"STATUS.",MAXSTATUS); } return(-1); } if (ChDir(pcon->connectpath) != 0) { DEBUG(0,("Can't change directory to %s (%s)\n", pcon->connectpath,strerror(errno))); pcon->open = False; unbecome_user(); if (!IS_IPC(cnum)) { yield_connection(cnum, lp_servicename(SNUM(cnum)), lp_max_connections(SNUM(cnum))); if (lp_status(SNUM(cnum))) yield_connection(cnum,"STATUS.",MAXSTATUS); } return(-5); } string_set(&pcon->origpath,pcon->connectpath); #if SOFTLINK_OPTIMISATION /* resolve any soft links early */ { pstring s; strcpy(s,pcon->connectpath); GetWd(s); string_set(&pcon->connectpath,s); ChDir(pcon->connectpath); } #endif num_connections_open++; add_session_user(user); /* execute any "preexec = " line */ if (*lp_preexec(SNUM(cnum))) { pstring cmd; strcpy(cmd,lp_preexec(SNUM(cnum))); standard_sub(cnum,cmd); smbrun(cmd,NULL); } /* we've finished with the sensitive stuff */ unbecome_user(); { extern struct from_host Client_info; DEBUG(IS_IPC(cnum)?3:1,("%s %s (%s) connect to service %s as user %s (uid=%d,gid=%d) (pid %d)\n", timestring(), Client_info.name,Client_info.addr, lp_servicename(SNUM(cnum)),user, pcon->uid, pcon->gid, (int)getpid())); } return(cnum); } /**************************************************************************** find first available file slot ****************************************************************************/ int find_free_file(void ) { int i; /* we start at 1 here for an obscure reason I can't now remember, but I think is important :-) */ for (i=1;i=SEC_USER) secword |= 1; if (doencrypt) secword |= 2; set_message(outbuf,13,doencrypt?8:0,True); SSVAL(outbuf,smb_vwv1,secword); #ifdef SMB_PASSWD /* Create a token value and add it to the outgoing packet. */ if (doencrypt) generate_next_challenge(smb_buf(outbuf)); #endif Protocol = PROTOCOL_LANMAN1; if (lp_security() == SEC_SERVER && server_cryptkey(outbuf)) { DEBUG(3,("using password server validation\n")); #ifdef SMB_PASSWD if (doencrypt) set_challenge(smb_buf(outbuf)); #endif } CVAL(outbuf,smb_flg) = 0x81; /* Reply, SMBlockread, SMBwritelock supported */ SSVAL(outbuf,smb_vwv2,maxxmit); SSVAL(outbuf,smb_vwv3,lp_maxmux()); /* maxmux */ SSVAL(outbuf,smb_vwv4,1); SSVAL(outbuf,smb_vwv5,raw); /* tell redirector we support readbraw writebraw (possibly) */ SIVAL(outbuf,smb_vwv6,getpid()); SSVAL(outbuf,smb_vwv10, TimeDiff(t)/60); put_dos_date(outbuf,smb_vwv8,t); return (smb_len(outbuf)+4); } /**************************************************************************** reply for the lanman 2.0 protocol ****************************************************************************/ int reply_lanman2(char *outbuf) { int raw = (lp_readraw()?1:0) | (lp_writeraw()?2:0); int secword=0; BOOL doencrypt = SMBENCRYPT(); time_t t = time(NULL); if (lp_security()>=SEC_USER) secword |= 1; if (doencrypt) secword |= 2; set_message(outbuf,13,doencrypt?8:0,True); SSVAL(outbuf,smb_vwv1,secword); #ifdef SMB_PASSWD /* Create a token value and add it to the outgoing packet. */ if (doencrypt) generate_next_challenge(smb_buf(outbuf)); #endif SIVAL(outbuf,smb_vwv6,getpid()); Protocol = PROTOCOL_LANMAN2; if (lp_security() == SEC_SERVER && server_cryptkey(outbuf)) { DEBUG(3,("using password server validation\n")); #ifdef SMB_PASSWD if (doencrypt) set_challenge(smb_buf(outbuf)); #endif } CVAL(outbuf,smb_flg) = 0x81; /* Reply, SMBlockread, SMBwritelock supported */ SSVAL(outbuf,smb_vwv2,maxxmit); SSVAL(outbuf,smb_vwv3,lp_maxmux()); SSVAL(outbuf,smb_vwv4,1); SSVAL(outbuf,smb_vwv5,raw); /* readbraw and/or writebraw */ SSVAL(outbuf,smb_vwv10, TimeDiff(t)/60); put_dos_date(outbuf,smb_vwv8,t); return (smb_len(outbuf)+4); } /**************************************************************************** reply for the nt protocol ****************************************************************************/ int reply_nt1(char *outbuf) { int capabilities=0x300; /* has dual names + lock_and_read */ int secword=0; BOOL doencrypt = SMBENCRYPT(); time_t t = time(NULL); if (lp_security()>=SEC_USER) secword |= 1; if (doencrypt) secword |= 2; set_message(outbuf,17,doencrypt?8:0,True); CVAL(outbuf,smb_vwv1) = secword; #ifdef SMB_PASSWD /* Create a token value and add it to the outgoing packet. */ if (doencrypt) { generate_next_challenge(smb_buf(outbuf)); /* Tell the nt machine how long the challenge is. */ SSVALS(outbuf,smb_vwv16+1,8); } #endif SIVAL(outbuf,smb_vwv7+1,getpid()); /* session key */ Protocol = PROTOCOL_NT1; if (lp_security() == SEC_SERVER && server_cryptkey(outbuf)) { DEBUG(3,("using password server validation\n")); #ifdef SMB_PASSWD if (doencrypt) set_challenge(smb_buf(outbuf)); #endif } if (lp_readraw() && lp_writeraw()) capabilities |= 1; SSVAL(outbuf,smb_vwv1+1,lp_maxmux()); /* maxmpx */ SSVAL(outbuf,smb_vwv2+1,1); /* num vcs */ SIVAL(outbuf,smb_vwv3+1,0xFFFF); /* max buffer */ SIVAL(outbuf,smb_vwv5+1,0xFFFF); /* raw size */ SIVAL(outbuf,smb_vwv9+1,capabilities); /* capabilities */ put_long_date(outbuf+smb_vwv11+1,t); SSVALS(outbuf,smb_vwv15+1,TimeDiff(t)/60); return (smb_len(outbuf)+4); } /* these are the protocol lists used for auto architecture detection: WinNT 3.51: protocol [PC NETWORK PROGRAM 1.0] protocol [XENIX CORE] protocol [MICROSOFT NETWORKS 1.03] protocol [LANMAN1.0] protocol [Windows for Workgroups 3.1a] protocol [LM1.2X002] protocol [LANMAN2.1] protocol [NT LM 0.12] Win95: protocol [PC NETWORK PROGRAM 1.0] protocol [XENIX CORE] protocol [MICROSOFT NETWORKS 1.03] protocol [LANMAN1.0] protocol [Windows for Workgroups 3.1a] protocol [LM1.2X002] protocol [LANMAN2.1] protocol [NT LM 0.12] OS/2: protocol [PC NETWORK PROGRAM 1.0] protocol [XENIX CORE] protocol [LANMAN1.0] protocol [LM1.2X002] protocol [LANMAN2.1] */ /* * Modified to recognize the architecture of the remote machine better. * * This appears to be the matrix of which protocol is used by which * MS product. Protocol WfWg Win95 WinNT OS/2 PC NETWORK PROGRAM 1.0 1 1 1 1 XENIX CORE 2 2 MICROSOFT NETWORKS 3.0 2 2 DOS LM1.2X002 3 3 MICROSOFT NETWORKS 1.03 3 DOS LANMAN2.1 4 4 LANMAN1.0 4 3 Windows for Workgroups 3.1a 5 5 5 LM1.2X002 6 4 LANMAN2.1 7 5 NT LM 0.12 6 8 * * tim@fsg.com 09/29/95 */ #define ARCH_WFWG 0x3 /* This is a fudge because WfWg is like Win95 */ #define ARCH_WIN95 0x2 #define ARCH_OS2 0xC /* Again OS/2 is like NT */ #define ARCH_WINNT 0x8 #define ARCH_SAMBA 0x10 #define ARCH_ALL 0x1F /* List of supported protocols, most desired first */ struct { char *proto_name; char *short_name; int (*proto_reply_fn)(char *); int protocol_level; } supported_protocols[] = { {"NT LANMAN 1.0", "NT1", reply_nt1, PROTOCOL_NT1}, {"NT LM 0.12", "NT1", reply_nt1, PROTOCOL_NT1}, {"LM1.2X002", "LANMAN2", reply_lanman2, PROTOCOL_LANMAN2}, {"Samba", "LANMAN2", reply_lanman2, PROTOCOL_LANMAN2}, {"DOS LM1.2X002", "LANMAN2", reply_lanman2, PROTOCOL_LANMAN2}, {"LANMAN1.0", "LANMAN1", reply_lanman1, PROTOCOL_LANMAN1}, {"MICROSOFT NETWORKS 3.0", "LANMAN1", reply_lanman1, PROTOCOL_LANMAN1}, {"MICROSOFT NETWORKS 1.03", "COREPLUS", reply_coreplus, PROTOCOL_COREPLUS}, {"PC NETWORK PROGRAM 1.0", "CORE", reply_corep, PROTOCOL_CORE}, {NULL,NULL}, }; /**************************************************************************** reply to a negprot ****************************************************************************/ static int reply_negprot(char *inbuf,char *outbuf) { extern fstring remote_arch; int outsize = set_message(outbuf,1,0,True); int Index=0; int choice= -1; int protocol; char *p; int bcc = SVAL(smb_buf(inbuf),-2); int arch = ARCH_ALL; p = smb_buf(inbuf)+1; while (p < (smb_buf(inbuf) + bcc)) { Index++; DEBUG(3,("Requested protocol [%s]\n",p)); if (strcsequal(p,"Windows for Workgroups 3.1a")) arch &= ( ARCH_WFWG | ARCH_WIN95 | ARCH_WINNT ); else if (strcsequal(p,"DOS LM1.2X002")) arch &= ( ARCH_WFWG | ARCH_WIN95 ); else if (strcsequal(p,"DOS LANMAN2.1")) arch &= ( ARCH_WFWG | ARCH_WIN95 ); else if (strcsequal(p,"NT LM 0.12")) arch &= ( ARCH_WIN95 | ARCH_WINNT ); else if (strcsequal(p,"LANMAN2.1")) arch &= ( ARCH_WINNT | ARCH_OS2 ); else if (strcsequal(p,"LM1.2X002")) arch &= ( ARCH_WINNT | ARCH_OS2 ); else if (strcsequal(p,"MICROSOFT NETWORKS 1.03")) arch &= ARCH_WINNT; else if (strcsequal(p,"XENIX CORE")) arch &= ( ARCH_WINNT | ARCH_OS2 ); else if (strcsequal(p,"Samba")) { arch = ARCH_SAMBA; break; } p += strlen(p) + 2; } switch ( arch ) { case ARCH_SAMBA: strcpy(remote_arch,"Samba"); break; case ARCH_WFWG: strcpy(remote_arch,"WfWg"); break; case ARCH_WIN95: strcpy(remote_arch,"Win95"); break; case ARCH_WINNT: strcpy(remote_arch,"WinNT"); break; case ARCH_OS2: strcpy(remote_arch,"OS2"); break; default: strcpy(remote_arch,"UNKNOWN"); break; } /* possibly reload - change of architecture */ reload_services(True); /* a special case to stop password server loops */ if (Index == 1 && strequal(remote_machine,myhostname) && lp_security()==SEC_SERVER) exit_server("Password server loop!"); /* Check for protocols, most desirable first */ for (protocol = 0; supported_protocols[protocol].proto_name; protocol++) { p = smb_buf(inbuf)+1; Index = 0; if (lp_maxprotocol() >= supported_protocols[protocol].protocol_level) while (p < (smb_buf(inbuf) + bcc)) { if (strequal(p,supported_protocols[protocol].proto_name)) choice = Index; Index++; p += strlen(p) + 2; } if(choice != -1) break; } SSVAL(outbuf,smb_vwv0,choice); if(choice != -1) { extern fstring remote_proto; strcpy(remote_proto,supported_protocols[protocol].short_name); reload_services(True); outsize = supported_protocols[protocol].proto_reply_fn(outbuf); DEBUG(3,("Selected protocol %s\n",supported_protocols[protocol].proto_name)); } else { DEBUG(0,("No protocol supported !\n")); } SSVAL(outbuf,smb_vwv0,choice); DEBUG(5,("%s negprot index=%d\n",timestring(),choice)); return(outsize); } /**************************************************************************** parse a connect packet ****************************************************************************/ void parse_connect(char *buf,char *service,char *user,char *password,int *pwlen,char *dev) { char *p = smb_buf(buf) + 1; char *p2; DEBUG(4,("parsing connect string %s\n",p)); p2 = strrchr(p,'\\'); if (p2 == NULL) strcpy(service,p); else strcpy(service,p2+1); p += strlen(p) + 2; strcpy(password,p); *pwlen = strlen(password); p += strlen(p) + 2; strcpy(dev,p); *user = 0; p = strchr(service,'%'); if (p != NULL) { *p = 0; strcpy(user,p+1); } } /**************************************************************************** close all open files for a connection ****************************************************************************/ static void close_open_files(int cnum) { int i; for (i=0;i=total_recs || fseek(f,i*sizeof(crec),SEEK_SET) != 0 || fread(&crec,sizeof(crec),1,f) != 1) { if (foundi < 0) foundi = i; break; } if (Clear && crec.pid && !process_exists(crec.pid)) { fseek(f,i*sizeof(crec),SEEK_SET); bzero((void *)&crec,sizeof(crec)); fwrite(&crec,sizeof(crec),1,f); if (foundi < 0) foundi = i; continue; } if (foundi < 0 && (!crec.pid || !process_exists(crec.pid))) { foundi=i; if (!Clear) break; } } if (foundi < 0) { DEBUG(3,("no free locks in %s\n",fname)); fclose(f); return(False); } /* fill in the crec */ bzero((void *)&crec,sizeof(crec)); crec.magic = 0x280267; crec.pid = getpid(); crec.cnum = cnum; crec.uid = Connections[cnum].uid; crec.gid = Connections[cnum].gid; StrnCpy(crec.name,lp_servicename(snum),sizeof(crec.name)-1); crec.start = time(NULL); { extern struct from_host Client_info; StrnCpy(crec.machine,Client_info.name,sizeof(crec.machine)-1); StrnCpy(crec.addr,Client_info.addr,sizeof(crec.addr)-1); } /* make our mark */ if (fseek(f,foundi*sizeof(crec),SEEK_SET) != 0 || fwrite(&crec,sizeof(crec),1,f) != 1) { fclose(f); return(False); } fclose(f); return(True); } #if DUMP_CORE /******************************************************************* prepare to dump a core file - carefully! ********************************************************************/ static BOOL dump_core(void) { char *p; pstring dname; strcpy(dname,debugf); if ((p=strrchr(dname,'/'))) *p=0; strcat(dname,"/corefiles"); mkdir(dname,0700); sys_chown(dname,getuid(),getgid()); chmod(dname,0700); if (chdir(dname)) return(False); umask(~(0700)); #ifndef NO_GETRLIMIT #ifdef RLIMIT_CORE { struct rlimit rlp; getrlimit(RLIMIT_CORE, &rlp); rlp.rlim_cur = MAX(4*1024*1024,rlp.rlim_cur); setrlimit(RLIMIT_CORE, &rlp); getrlimit(RLIMIT_CORE, &rlp); DEBUG(3,("Core limits now %d %d\n",rlp.rlim_cur,rlp.rlim_max)); } #endif #endif DEBUG(0,("Dumping core in %s\n",dname)); return(True); } #endif /**************************************************************************** exit the server ****************************************************************************/ void exit_server(char *reason) { static int firsttime=1; int i; if (!firsttime) exit(0); firsttime = 0; unbecome_user(); DEBUG(2,("Closing connections\n")); for (i=0;i 4) smb_setlen(outbuf,outsize - 4); return(outsize); } /**************************************************************************** process commands from the client ****************************************************************************/ static void process(void) { static int trans_num = 0; int nread; extern struct from_host Client_info; extern int Client; fromhost(Client,&Client_info); InBuffer = (char *)malloc(BUFFER_SIZE + SAFETY_MARGIN); OutBuffer = (char *)malloc(BUFFER_SIZE + SAFETY_MARGIN); if ((InBuffer == NULL) || (OutBuffer == NULL)) return; InBuffer += SMB_ALIGNMENT; OutBuffer += SMB_ALIGNMENT; #if PRIME_NMBD DEBUG(3,("priming nmbd\n")); { struct in_addr ip; ip = *interpret_addr2("localhost"); if (zero_ip(ip)) ip = *interpret_addr2("127.0.0.1"); *OutBuffer = 0; send_one_packet(OutBuffer,1,ip,NMB_PORT,SOCK_DGRAM); } #endif while (True) { int32 len; int msg_type; int msg_flags; int type; int deadtime = lp_deadtime()*60; int counter; int last_keepalive=0; if (deadtime <= 0) deadtime = DEFAULT_SMBD_TIMEOUT; if (lp_readprediction()) do_read_prediction(); { extern pstring share_del_pending; if (*share_del_pending) { unbecome_user(); if (!unlink(share_del_pending)) DEBUG(3,("Share file deleted %s\n",share_del_pending)); else DEBUG(2,("Share del failed of %s\n",share_del_pending)); share_del_pending[0] = 0; } } if (share_mode_pending) { unbecome_user(); check_share_modes(); share_mode_pending=False; } errno = 0; for (counter=SMBD_SELECT_LOOP; !receive_smb(Client,InBuffer,SMBD_SELECT_LOOP*1000); counter += SMBD_SELECT_LOOP) { int i; time_t t; BOOL allidle = True; extern int keepalive; /* check for socket failure */ if (errno) { DEBUG(3,("receive_smb error (%s) exiting\n",strerror(errno))); return; } t = time(NULL); { /* the following bit of code was added to combat smbd looping chewing lots of CPU time. It should never actually be needed, but it seems that some systems don't set error correctly, which is used to distinguish a select() timeout from a read error we exit if receive_smb() returns false 3 times in one second. */ static int error_count=0; static time_t error_time=0; if (error_count==0) { error_time = t; } else if (error_time != t) { error_count = 0; } else if (error_count++ > 2) { exit_server("looping in process()\n"); } } /* become root again if waiting */ unbecome_user(); /* check for smb.conf reload */ if (!(counter%SMBD_RELOAD_CHECK)) reload_services(True); /* check the share modes every 10 secs */ if (!(counter%SHARE_MODES_CHECK)) check_share_modes(); /* clean the share modes every 5 minutes */ if (!(counter%SHARE_MODES_CLEAN)) clean_share_files(); /* automatic timeout if all connections are closed */ if (num_connections_open==0 && counter >= IDLE_CLOSED_TIMEOUT) { DEBUG(2,("%s Closing idle connection\n",timestring())); return; } if (keepalive && (counter-last_keepalive)>keepalive) { extern int password_client; if (!send_keepalive(Client)) { DEBUG(2,("%s Keepalive failed - exiting\n",timestring())); return; } /* also send a keepalive to the password server if its still connected */ if (password_client != -1) send_keepalive(password_client); last_keepalive = counter; } /* check for connection timeouts */ for (i=0;iDPTR_IDLE_TIMEOUT) dptr_idlecnum(i); if (Connections[i].num_files_open > 0 || (t-Connections[i].lastused)0) { DEBUG(2,("%s Closing idle connection 2\n",timestring())); return; } } msg_type = CVAL(InBuffer,0); msg_flags = CVAL(InBuffer,1); type = CVAL(InBuffer,smb_com); len = smb_len(InBuffer); DEBUG(6,("got message type 0x%x of len 0x%x\n",msg_type,len)); nread = len + 4; DEBUG(3,("%s Transaction %d of length %d\n",timestring(),trans_num,nread)); #ifdef WITH_VTP if(trans_num == 1 && VT_Check(InBuffer)) { VT_Process(); return; } #endif if (msg_type == 0) show_msg(InBuffer); nread = construct_reply(InBuffer,OutBuffer,nread,maxxmit); if(nread > 0) { if (CVAL(OutBuffer,0) == 0) show_msg(OutBuffer); if (nread != smb_len(OutBuffer) + 4) { DEBUG(0,("ERROR: Invalid message response size! %d %d\n", nread, smb_len(OutBuffer))); } else send_smb(Client,OutBuffer); } trans_num++; } } /**************************************************************************** initialise connect, service and file structs ****************************************************************************/ static void init_structs(void ) { int i; get_myname(myhostname,NULL); for (i=0;i 1 && (*argv[1] != '-')) { argv++; argc--; } while ((opt = getopt(argc, argv, "O:i:l:s:d:Dp:hPa")) != EOF) switch (opt) { case 'O': strcpy(user_socket_options,optarg); break; case 'i': strcpy(scope,optarg); break; case 'P': { extern BOOL passive; passive = True; } break; case 's': strcpy(servicesf,optarg); break; case 'l': strcpy(debugf,optarg); break; case 'a': { extern BOOL append_log; append_log = !append_log; } break; case 'D': is_daemon = True; break; case 'd': if (*optarg == 'A') DEBUGLEVEL = 10000; else DEBUGLEVEL = atoi(optarg); break; case 'p': port = atoi(optarg); break; case 'h': usage(argv[0]); exit(0); break; default: usage(argv[0]); exit(1); } reopen_logs(); DEBUG(2,("%s smbd version %s started\n",timestring(),VERSION)); DEBUG(2,("Copyright Andrew Tridgell 1992-1995\n")); #ifndef NO_GETRLIMIT #ifdef RLIMIT_NOFILE { struct rlimit rlp; getrlimit(RLIMIT_NOFILE, &rlp); rlp.rlim_cur = (MAX_OPEN_FILES>rlp.rlim_max)? rlp.rlim_max:MAX_OPEN_FILES; setrlimit(RLIMIT_NOFILE, &rlp); getrlimit(RLIMIT_NOFILE, &rlp); DEBUG(3,("Maximum number of open files per session is %d\n",rlp.rlim_cur)); } #endif #endif DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n", getuid(),getgid(),geteuid(),getegid())); if (sizeof(uint16) < 2 || sizeof(uint32) < 4) { DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n")); exit(1); } init_structs(); if (!reload_services(False)) return(-1); #ifndef NO_SIGNAL_TEST signal(SIGHUP,SIGNAL_CAST sig_hup); #endif DEBUG(3,("%s loaded services\n",timestring())); if (!is_daemon && !is_a_socket(0)) { DEBUG(0,("standard input is not a socket, assuming -D option\n")); is_daemon = True; } if (is_daemon) { DEBUG(3,("%s becoming a daemon\n",timestring())); become_daemon(); } if (!open_sockets(is_daemon,port)) exit(1); /* possibly reload the services file. */ reload_services(True); maxxmit = MIN(lp_maxxmit(),BUFFER_SIZE); if (*lp_rootdir()) { if (sys_chroot(lp_rootdir()) == 0) DEBUG(2,("%s changed root to %s\n",timestring(),lp_rootdir())); } process(); close_sockets(); exit_server("normal exit"); return(0); }