/* Unix SMB/Netbios implementation. Version 1.9. Samba utility functions Copyright (C) Andrew Tridgell 1992-1997 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" pstring scope = ""; int DEBUGLEVEL = 1; BOOL passive = False; int Protocol = PROTOCOL_COREPLUS; /* a default finfo structure to ensure all fields are sensible */ file_info def_finfo = {-1,0,0,0,0,0,0,""}; /* these are some file handles where debug info will be stored */ FILE *dbf = NULL; /* the client file descriptor */ int Client = -1; /* the last IP received from */ struct in_addr lastip; /* the last port received from */ int lastport=0; /* this is used by the chaining code */ int chain_size = 0; int trans_num = 0; /* case handling on filenames */ int case_default = CASE_LOWER; pstring debugf = ""; int syslog_level; /* the following control case operations - they are put here so the client can link easily */ BOOL case_sensitive; BOOL case_preserve; BOOL use_mangled_map = False; BOOL short_case_preserve; BOOL case_mangle; fstring remote_machine=""; fstring local_machine=""; fstring remote_arch="UNKNOWN"; fstring remote_proto="UNKNOWN"; pstring myhostname=""; pstring user_socket_options=""; pstring sesssetup_user=""; pstring myname = ""; fstring myworkgroup = ""; char **my_netbios_names; int smb_read_error = 0; static BOOL stdout_logging = False; static char *filename_dos(char *path,char *buf); /******************************************************************* get ready for syslog stuff ******************************************************************/ void setup_logging(char *pname,BOOL interactive) { #ifdef SYSLOG if (!interactive) { char *p = strrchr(pname,'/'); if (p) pname = p+1; openlog(pname, LOG_PID, LOG_DAEMON); } #endif if (interactive) { stdout_logging = True; dbf = stdout; } } BOOL append_log=False; /**************************************************************************** reopen the log files ****************************************************************************/ void reopen_logs(void) { extern FILE *dbf; pstring fname; if (DEBUGLEVEL > 0) { strcpy(fname,debugf); if (lp_loaded() && (*lp_logfile())) strcpy(fname,lp_logfile()); if (!strcsequal(fname,debugf) || !dbf || !file_exist(debugf,NULL)) { int oldumask = umask(022); strcpy(debugf,fname); if (dbf) fclose(dbf); if (append_log) dbf = fopen(debugf,"a"); else dbf = fopen(debugf,"w"); if (dbf) setbuf(dbf,NULL); umask(oldumask); } } else { if (dbf) { fclose(dbf); dbf = NULL; } } } /******************************************************************* check if the log has grown too big ********************************************************************/ static void check_log_size(void) { static int debug_count=0; int maxlog; struct stat st; if (debug_count++ < 100) return; maxlog = lp_max_log_size() * 1024; if (!dbf || maxlog <= 0) return; if (fstat(fileno(dbf),&st) == 0 && st.st_size > maxlog) { fclose(dbf); dbf = NULL; reopen_logs(); if (dbf && file_size(debugf) > maxlog) { pstring name; fclose(dbf); dbf = NULL; sprintf(name,"%s.old",debugf); sys_rename(debugf,name); reopen_logs(); } } debug_count=0; } /******************************************************************* write an debug message on the debugfile. This is called by the DEBUG macro ********************************************************************/ #ifdef __STDC__ int Debug1(char *format_str, ...) { #else int Debug1(va_alist) va_dcl { char *format_str; #endif va_list ap; if (stdout_logging) { #ifdef __STDC__ va_start(ap, format_str); #else va_start(ap); format_str = va_arg(ap,char *); #endif vfprintf(dbf,format_str,ap); va_end(ap); return(0); } #ifdef SYSLOG if (!lp_syslog_only()) #endif { if (!dbf) { int oldumask = umask(022); dbf = fopen(debugf,"w"); umask(oldumask); if (dbf) setbuf(dbf,NULL); else return(0); } } #ifdef SYSLOG if (syslog_level < lp_syslog()) { /* * map debug levels to syslog() priorities * note that not all DEBUG(0, ...) calls are * necessarily errors */ static int priority_map[] = { LOG_ERR, /* 0 */ LOG_WARNING, /* 1 */ LOG_NOTICE, /* 2 */ LOG_INFO, /* 3 */ }; int priority; pstring msgbuf; if (syslog_level >= sizeof(priority_map) / sizeof(priority_map[0]) || syslog_level < 0) priority = LOG_DEBUG; else priority = priority_map[syslog_level]; #ifdef __STDC__ va_start(ap, format_str); #else va_start(ap); format_str = va_arg(ap,char *); #endif vsprintf(msgbuf, format_str, ap); va_end(ap); msgbuf[255] = '\0'; syslog(priority, "%s", msgbuf); } #endif #ifdef SYSLOG if (!lp_syslog_only()) #endif { #ifdef __STDC__ va_start(ap, format_str); #else va_start(ap); format_str = va_arg(ap,char *); #endif vfprintf(dbf,format_str,ap); va_end(ap); fflush(dbf); } check_log_size(); return(0); } /**************************************************************************** find a suitable temporary directory. The result should be copied immediately as it may be overwritten by a subsequent call ****************************************************************************/ char *tmpdir(void) { char *p; if ((p = getenv("TMPDIR"))) { return p; } return "/tmp"; } /**************************************************************************** determine if a file descriptor is in fact a socket ****************************************************************************/ BOOL is_a_socket(int fd) { int v,l; l = sizeof(int); return(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&v, &l) == 0); } static char *last_ptr=NULL; /**************************************************************************** Get the next token from a string, return False if none found handles double-quotes. Based on a routine by GJC@VILLAGE.COM. Extensively modified by Andrew.Tridgell@anu.edu.au ****************************************************************************/ BOOL next_token(char **ptr,char *buff,char *sep) { char *s; BOOL quoted; if (!ptr) ptr = &last_ptr; if (!ptr) return(False); s = *ptr; /* default to simple separators */ if (!sep) sep = " \t\n\r"; /* find the first non sep char */ while(*s && strchr(sep,*s)) s++; /* nothing left? */ if (! *s) return(False); /* copy over the token */ for (quoted = False; *s && (quoted || !strchr(sep,*s)); s++) { if (*s == '\"') quoted = !quoted; else *buff++ = *s; } *ptr = (*s) ? s+1 : s; *buff = 0; last_ptr = *ptr; return(True); } /**************************************************************************** Convert list of tokens to array; dependent on above routine. Uses last_ptr from above - bit of a hack. ****************************************************************************/ char **toktocliplist(int *ctok, char *sep) { char *s=last_ptr; int ictok=0; char **ret, **iret; if (!sep) sep = " \t\n\r"; while(*s && strchr(sep,*s)) s++; /* nothing left? */ if (!*s) return(NULL); do { ictok++; while(*s && (!strchr(sep,*s))) s++; while(*s && strchr(sep,*s)) *s++=0; } while(*s); *ctok=ictok; s=last_ptr; if (!(ret=iret=malloc(ictok*sizeof(char *)))) return NULL; while(ictok--) { *iret++=s; while(*s++); while(!*s) s++; } return ret; } #ifndef HAVE_MEMMOVE /******************************************************************* safely copies memory, ensuring no overlap problems. this is only used if the machine does not have it's own memmove(). this is not the fastest algorithm in town, but it will do for our needs. ********************************************************************/ void *MemMove(void *dest,void *src,int size) { unsigned long d,s; int i; if (dest==src || !size) return(dest); d = (unsigned long)dest; s = (unsigned long)src; if ((d >= (s+size)) || (s >= (d+size))) { /* no overlap */ memcpy(dest,src,size); return(dest); } if (d < s) { /* we can forward copy */ if (s-d >= sizeof(int) && !(s%sizeof(int)) && !(d%sizeof(int)) && !(size%sizeof(int))) { /* do it all as words */ int *idest = (int *)dest; int *isrc = (int *)src; size /= sizeof(int); for (i=0;i= sizeof(int) && !(s%sizeof(int)) && !(d%sizeof(int)) && !(size%sizeof(int))) { /* do it all as words */ int *idest = (int *)dest; int *isrc = (int *)src; size /= sizeof(int); for (i=size-1;i>=0;i--) idest[i] = isrc[i]; } else { /* simplest */ char *cdest = (char *)dest; char *csrc = (char *)src; for (i=size-1;i>=0;i--) cdest[i] = csrc[i]; } } return(dest); } #endif /**************************************************************************** prompte a dptr (to make it recently used) ****************************************************************************/ void array_promote(char *array,int elsize,int element) { char *p; if (element == 0) return; p = (char *)malloc(elsize); if (!p) { DEBUG(5,("Ahh! Can't malloc\n")); return; } memcpy(p,array + element * elsize, elsize); memmove(array + elsize,array,elsize*element); memcpy(array,p,elsize); free(p); } enum SOCK_OPT_TYPES {OPT_BOOL,OPT_INT,OPT_ON}; struct { char *name; int level; int option; int value; int opttype; } socket_options[] = { {"SO_KEEPALIVE", SOL_SOCKET, SO_KEEPALIVE, 0, OPT_BOOL}, {"SO_REUSEADDR", SOL_SOCKET, SO_REUSEADDR, 0, OPT_BOOL}, {"SO_BROADCAST", SOL_SOCKET, SO_BROADCAST, 0, OPT_BOOL}, #ifdef TCP_NODELAY {"TCP_NODELAY", IPPROTO_TCP, TCP_NODELAY, 0, OPT_BOOL}, #endif #ifdef IPTOS_LOWDELAY {"IPTOS_LOWDELAY", IPPROTO_IP, IP_TOS, IPTOS_LOWDELAY, OPT_ON}, #endif #ifdef IPTOS_THROUGHPUT {"IPTOS_THROUGHPUT", IPPROTO_IP, IP_TOS, IPTOS_THROUGHPUT, OPT_ON}, #endif #ifdef SO_SNDBUF {"SO_SNDBUF", SOL_SOCKET, SO_SNDBUF, 0, OPT_INT}, #endif #ifdef SO_RCVBUF {"SO_RCVBUF", SOL_SOCKET, SO_RCVBUF, 0, OPT_INT}, #endif #ifdef SO_SNDLOWAT {"SO_SNDLOWAT", SOL_SOCKET, SO_SNDLOWAT, 0, OPT_INT}, #endif #ifdef SO_RCVLOWAT {"SO_RCVLOWAT", SOL_SOCKET, SO_RCVLOWAT, 0, OPT_INT}, #endif #ifdef SO_SNDTIMEO {"SO_SNDTIMEO", SOL_SOCKET, SO_SNDTIMEO, 0, OPT_INT}, #endif #ifdef SO_RCVTIMEO {"SO_RCVTIMEO", SOL_SOCKET, SO_RCVTIMEO, 0, OPT_INT}, #endif {NULL,0,0,0,0}}; /**************************************************************************** set user socket options ****************************************************************************/ void set_socket_options(int fd, char *options) { string tok; while (next_token(&options,tok," \t,")) { int ret=0,i; int value = 1; char *p; BOOL got_value = False; if ((p = strchr(tok,'='))) { *p = 0; value = atoi(p+1); got_value = True; } for (i=0;socket_options[i].name;i++) if (strequal(socket_options[i].name,tok)) break; if (!socket_options[i].name) { DEBUG(0,("Unknown socket option %s\n",tok)); continue; } switch (socket_options[i].opttype) { case OPT_BOOL: case OPT_INT: ret = setsockopt(fd,socket_options[i].level, socket_options[i].option,(char *)&value,sizeof(int)); break; case OPT_ON: if (got_value) DEBUG(0,("syntax error - %s does not take a value\n",tok)); { int on = socket_options[i].value; ret = setsockopt(fd,socket_options[i].level, socket_options[i].option,(char *)&on,sizeof(int)); } break; } if (ret != 0) DEBUG(0,("Failed to set socket option %s\n",tok)); } } /**************************************************************************** close the socket communication ****************************************************************************/ void close_sockets(void ) { close(Client); Client = 0; } /**************************************************************************** determine whether we are in the specified group ****************************************************************************/ BOOL in_group(gid_t group, int current_gid, int ngroups, int *groups) { int i; if (group == current_gid) return(True); for (i=0;i 30 || len<1) return(0); while (len--) { if (in[0] < 'A' || in[0] > 'P' || in[1] < 'A' || in[1] > 'P') { *out = 0; return(0); } *out = ((in[0]-'A')<<4) + (in[1]-'A'); in += 2; out++; } *out = 0; ret = out[-1]; #ifdef NETBIOS_SCOPE /* Handle any scope names */ while(*in) { *out++ = '.'; /* Scope names are separated by periods */ len = *(unsigned char *)in++; StrnCpy(out, in, len); out += len; *out=0; in += len; } #endif return(ret); } /**************************************************************************** mangle a name into netbios format ****************************************************************************/ int name_mangle(char *In,char *Out,char name_type) { fstring name; char buf[20]; char *in = (char *)&buf[0]; char *out = (char *)Out; char *p, *label; int i; if (In[0] != '*') { StrnCpy(name,In,sizeof(name)-1); sprintf(buf,"%-15.15s%c",name,name_type); } else { buf[0]='*'; memset(&buf[1],0,16); } *out++ = 32; for (i=0;i<16;i++) { char c = toupper(in[i]); out[i*2] = (c>>4) + 'A'; out[i*2+1] = (c & 0xF) + 'A'; } out[32]=0; out += 32; label = scope; while (*label) { p = strchr(label, '.'); if (p == 0) p = label + strlen(label); *out++ = p - label; memcpy(out, label, p - label); out += p - label; label += p - label + (*p == '.'); } *out = 0; return(name_len(Out)); } /******************************************************************* check if a file exists ********************************************************************/ BOOL file_exist(char *fname,struct stat *sbuf) { struct stat st; if (!sbuf) sbuf = &st; if (sys_stat(fname,sbuf) != 0) return(False); return(S_ISREG(sbuf->st_mode)); } /******************************************************************* check a files mod time ********************************************************************/ time_t file_modtime(char *fname) { struct stat st; if (sys_stat(fname,&st) != 0) return(0); return(st.st_mtime); } /******************************************************************* check if a directory exists ********************************************************************/ BOOL directory_exist(char *dname,struct stat *st) { struct stat st2; if (!st) st = &st2; if (sys_stat(dname,st) != 0) return(False); return(S_ISDIR(st->st_mode)); } /******************************************************************* returns the size in bytes of the named file ********************************************************************/ uint32 file_size(char *file_name) { struct stat buf; buf.st_size = 0; sys_stat(file_name,&buf); return(buf.st_size); } /******************************************************************* return a string representing an attribute for a file ********************************************************************/ char *attrib_string(int mode) { static char attrstr[10]; attrstr[0] = 0; if (mode & aVOLID) strcat(attrstr,"V"); if (mode & aDIR) strcat(attrstr,"D"); if (mode & aARCH) strcat(attrstr,"A"); if (mode & aHIDDEN) strcat(attrstr,"H"); if (mode & aSYSTEM) strcat(attrstr,"S"); if (mode & aRONLY) strcat(attrstr,"R"); return(attrstr); } /******************************************************************* case insensitive string compararison ********************************************************************/ int StrCaseCmp(const char *s, const char *t) { /* compare until we run out of string, either t or s, or find a difference */ /* We *must* use toupper rather than tolower here due to the asynchronous upper to lower mapping. */ while (*s && *t && toupper(*s) == toupper(*t)) { s++; t++; } return(toupper(*s) - toupper(*t)); } /******************************************************************* case insensitive string compararison, length limited ********************************************************************/ int StrnCaseCmp(const char *s, const char *t, int n) { /* compare until we run out of string, either t or s, or chars */ /* We *must* use toupper rather than tolower here due to the asynchronous upper to lower mapping. */ while (n-- && *s && *t && toupper(*s) == toupper(*t)) { s++; t++; } /* not run out of chars - strings are different lengths */ if (n) return(toupper(*s) - toupper(*t)); /* identical up to where we run out of chars, and strings are same length */ return(0); } /******************************************************************* compare 2 strings ********************************************************************/ BOOL strequal(const char *s1, const char *s2) { if (s1 == s2) return(True); if (!s1 || !s2) return(False); return(StrCaseCmp(s1,s2)==0); } /******************************************************************* compare 2 strings up to and including the nth char. ******************************************************************/ BOOL strnequal(const char *s1,const char *s2,int n) { if (s1 == s2) return(True); if (!s1 || !s2 || !n) return(False); return(StrnCaseCmp(s1,s2,n)==0); } /******************************************************************* compare 2 strings (case sensitive) ********************************************************************/ BOOL strcsequal(char *s1,char *s2) { if (s1 == s2) return(True); if (!s1 || !s2) return(False); return(strcmp(s1,s2)==0); } /******************************************************************* convert a string to lower case ********************************************************************/ void strlower(char *s) { while (*s) { #ifdef KANJI if (is_shift_jis (*s)) { s += 2; } else if (is_kana (*s)) { s++; } else { if (isupper(*s)) *s = tolower(*s); s++; } #else if (isupper(*s)) *s = tolower(*s); s++; #endif /* KANJI */ } } /******************************************************************* convert a string to upper case ********************************************************************/ void strupper(char *s) { while (*s) { #ifdef KANJI if (is_shift_jis (*s)) { s += 2; } else if (is_kana (*s)) { s++; } else { if (islower(*s)) *s = toupper(*s); s++; } #else if (islower(*s)) *s = toupper(*s); s++; #endif } } /******************************************************************* convert a string to "normal" form ********************************************************************/ void strnorm(char *s) { if (case_default == CASE_UPPER) strupper(s); else strlower(s); } /******************************************************************* check if a string is in "normal" case ********************************************************************/ BOOL strisnormal(char *s) { if (case_default == CASE_UPPER) return(!strhaslower(s)); return(!strhasupper(s)); } /**************************************************************************** string replace ****************************************************************************/ void string_replace(char *s,char oldc,char newc) { while (*s) { #ifdef KANJI if (is_shift_jis (*s)) { s += 2; } else if (is_kana (*s)) { s++; } else { if (oldc == *s) *s = newc; s++; } #else if (oldc == *s) *s = newc; s++; #endif /* KANJI */ } } /**************************************************************************** make a file into unix format ****************************************************************************/ void unix_format(char *fname) { pstring namecopy; string_replace(fname,'\\','/'); if (*fname == '/') { strcpy(namecopy,fname); strcpy(fname,"."); strcat(fname,namecopy); } } /**************************************************************************** make a file into dos format ****************************************************************************/ void dos_format(char *fname) { string_replace(fname,'/','\\'); } /******************************************************************* show a smb message structure ********************************************************************/ void show_msg(char *buf) { int i; int j; int bcc=0; if (DEBUGLEVEL < 5) return; DEBUG(5,("size=%d\nsmb_com=0x%x\nsmb_rcls=%d\nsmb_reh=%d\nsmb_err=%d\nsmb_flg=%d\nsmb_flg2=%d\n", smb_len(buf), (int)CVAL(buf,smb_com), (int)CVAL(buf,smb_rcls), (int)CVAL(buf,smb_reh), (int)SVAL(buf,smb_err), (int)CVAL(buf,smb_flg), (int)SVAL(buf,smb_flg2))); DEBUG(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\nsmt_wct=%d\n", (int)SVAL(buf,smb_tid), (int)SVAL(buf,smb_pid), (int)SVAL(buf,smb_uid), (int)SVAL(buf,smb_mid), (int)CVAL(buf,smb_wct))); for (i=0;i<(int)CVAL(buf,smb_wct);i++) DEBUG(5,("smb_vwv[%d]=%d (0x%X)\n",i, SVAL(buf,smb_vwv+2*i),SVAL(buf,smb_vwv+2*i))); bcc = (int)SVAL(buf,smb_vwv+2*(CVAL(buf,smb_wct))); DEBUG(5,("smb_bcc=%d\n",bcc)); if (DEBUGLEVEL < 10) return; for (i = 0; i < MIN(bcc, 256); i += 16) { for (j = 0; j < 16 && i+j < MIN(bcc,256); j++) { DEBUG(10,("%2X ",CVAL(smb_buf(buf),i+j))); if (j == 7) DEBUG(10, (" ")); } DEBUG(10,(" ")); for (j = 0; j < 16 && i+j < MIN(bcc,256); j++) { unsigned char c = CVAL(smb_buf(buf),i+j); if (c < 32 || c > 128) c = '.'; DEBUG(10,("%c",c)); if (j == 7) DEBUG(10, (" ")); } DEBUG(10,("\n")); } } /******************************************************************* return the length of an smb packet ********************************************************************/ int smb_len(char *buf) { return( PVAL(buf,3) | (PVAL(buf,2)<<8) | ((PVAL(buf,1)&1)<<16) ); } /******************************************************************* set the length of an smb packet ********************************************************************/ void _smb_setlen(char *buf,int len) { buf[0] = 0; buf[1] = (len&0x10000)>>16; buf[2] = (len&0xFF00)>>8; buf[3] = len&0xFF; } /******************************************************************* set the length and marker of an smb packet ********************************************************************/ void smb_setlen(char *buf,int len) { _smb_setlen(buf,len); CVAL(buf,4) = 0xFF; CVAL(buf,5) = 'S'; CVAL(buf,6) = 'M'; CVAL(buf,7) = 'B'; } /******************************************************************* setup the word count and byte count for a smb message ********************************************************************/ int set_message(char *buf,int num_words,int num_bytes,BOOL zero) { if (zero) bzero(buf + smb_size,num_words*2 + num_bytes); CVAL(buf,smb_wct) = num_words; SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes); smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4); return (smb_size + num_words*2 + num_bytes); } /******************************************************************* return the number of smb words ********************************************************************/ int smb_numwords(char *buf) { return (CVAL(buf,smb_wct)); } /******************************************************************* return the size of the smb_buf region of a message ********************************************************************/ int smb_buflen(char *buf) { return(SVAL(buf,smb_vwv0 + smb_numwords(buf)*2)); } /******************************************************************* return a pointer to the smb_buf data area ********************************************************************/ int smb_buf_ofs(char *buf) { return (smb_size + CVAL(buf,smb_wct)*2); } /******************************************************************* return a pointer to the smb_buf data area ********************************************************************/ char *smb_buf(char *buf) { return (buf + smb_buf_ofs(buf)); } /******************************************************************* return the SMB offset into an SMB buffer ********************************************************************/ int smb_offset(char *p,char *buf) { return(PTR_DIFF(p,buf+4) + chain_size); } /******************************************************************* skip past some strings in a buffer ********************************************************************/ char *skip_string(char *buf,int n) { while (n--) buf += strlen(buf) + 1; return(buf); } /******************************************************************* trim the specified elements off the front and back of a string ********************************************************************/ BOOL trim_string(char *s,char *front,char *back) { BOOL ret = False; while (front && *front && strncmp(s,front,strlen(front)) == 0) { char *p = s; ret = True; while (1) { if (!(*p = p[strlen(front)])) break; p++; } } while (back && *back && strlen(s) >= strlen(back) && (strncmp(s+strlen(s)-strlen(back),back,strlen(back))==0)) { ret = True; s[strlen(s)-strlen(back)] = 0; } return(ret); } /******************************************************************* reduce a file name, removing .. elements. ********************************************************************/ void dos_clean_name(char *s) { char *p=NULL; DEBUG(3,("dos_clean_name [%s]\n",s)); /* remove any double slashes */ string_sub(s, "\\\\", "\\"); while ((p = strstr(s,"\\..\\")) != NULL) { pstring s1; *p = 0; strcpy(s1,p+3); if ((p=strrchr(s,'\\')) != NULL) *p = 0; else *s = 0; strcat(s,s1); } trim_string(s,NULL,"\\.."); string_sub(s, "\\.\\", "\\"); } /******************************************************************* reduce a file name, removing .. elements. ********************************************************************/ void unix_clean_name(char *s) { char *p=NULL; DEBUG(3,("unix_clean_name [%s]\n",s)); /* remove any double slashes */ string_sub(s, "//","/"); /* Remove leading ./ characters */ if(strncmp(s, "./", 2) == 0) { trim_string(s, "./", NULL); if(*s == 0) strcpy(s,"./"); } while ((p = strstr(s,"/../")) != NULL) { pstring s1; *p = 0; strcpy(s1,p+3); if ((p=strrchr(s,'/')) != NULL) *p = 0; else *s = 0; strcat(s,s1); } trim_string(s,NULL,"/.."); } /******************************************************************* a wrapper for the normal chdir() function ********************************************************************/ int ChDir(char *path) { int res; static pstring LastDir=""; if (strcsequal(path,".")) return(0); if (*path == '/' && strcsequal(LastDir,path)) return(0); DEBUG(3,("chdir to %s\n",path)); res = sys_chdir(path); if (!res) strcpy(LastDir,path); return(res); } /******************************************************************* return the absolute current directory path. A dumb version. ********************************************************************/ static char *Dumb_GetWd(char *s) { #ifdef USE_GETCWD return ((char *)getcwd(s,sizeof(pstring))); #else return ((char *)getwd(s)); #endif } /* number of list structures for a caching GetWd function. */ #define MAX_GETWDCACHE (50) struct { ino_t inode; dev_t dev; char *text; BOOL valid; } ino_list[MAX_GETWDCACHE]; BOOL use_getwd_cache=True; /******************************************************************* return the absolute current directory path ********************************************************************/ char *GetWd(char *str) { pstring s; static BOOL getwd_cache_init = False; struct stat st, st2; int i; *s = 0; if (!use_getwd_cache) return(Dumb_GetWd(str)); /* init the cache */ if (!getwd_cache_init) { getwd_cache_init = True; for (i=0;i 8) { strcpy(mext,mbeg + 8); mbeg[8] = 0; } } if (*mbeg == 0) strcpy(mbeg,"????????"); if ((*mext == 0) && doext && !hasdot) strcpy(mext,"???"); if (strequal(mbeg,"*") && *mext==0) strcpy(mext,"*"); /* expand *'s */ expand_one(mbeg,8); if (*mext) expand_one(mext,3); strcpy(Mask,dirpart); if (*dirpart || absolute) strcat(Mask,"\\"); strcat(Mask,mbeg); strcat(Mask,"."); strcat(Mask,mext); DEBUG(6,("Mask expanded to [%s]\n",Mask)); } /**************************************************************************** does a string have any uppercase chars in it? ****************************************************************************/ BOOL strhasupper(char *s) { while (*s) { #ifdef KANJI if (is_shift_jis (*s)) { s += 2; } else if (is_kana (*s)) { s++; } else { if (isupper(*s)) return(True); s++; } #else if (isupper(*s)) return(True); s++; #endif /* KANJI */ } return(False); } /**************************************************************************** does a string have any lowercase chars in it? ****************************************************************************/ BOOL strhaslower(char *s) { while (*s) { #ifdef KANJI if (is_shift_jis (*s)) { s += 2; } else if (is_kana (*s)) { s++; } else { if (islower(*s)) return(True); s++; } #else if (islower(*s)) return(True); s++; #endif /* KANJI */ } return(False); } /**************************************************************************** find the number of chars in a string ****************************************************************************/ int count_chars(char *s,char c) { int count=0; while (*s) { if (*s == c) count++; s++; } return(count); } /**************************************************************************** make a dir struct ****************************************************************************/ void make_dir_struct(char *buf,char *mask,char *fname,unsigned int size,int mode,time_t date) { char *p; pstring mask2; strcpy(mask2,mask); if ((mode & aDIR) != 0) size = 0; memset(buf+1,' ',11); if ((p = strchr(mask2,'.')) != NULL) { *p = 0; memcpy(buf+1,mask2,MIN(strlen(mask2),8)); memcpy(buf+9,p+1,MIN(strlen(p+1),3)); *p = '.'; } else memcpy(buf+1,mask2,MIN(strlen(mask2),11)); bzero(buf+21,DIR_STRUCT_SIZE-21); CVAL(buf,21) = mode; put_dos_date(buf,22,date); SSVAL(buf,26,size & 0xFFFF); SSVAL(buf,28,size >> 16); StrnCpy(buf+30,fname,12); if (!case_sensitive) strupper(buf+30); DEBUG(8,("put name [%s] into dir struct\n",buf+30)); } /******************************************************************* close the low 3 fd's and open dev/null in their place ********************************************************************/ void close_low_fds(void) { int fd; int i; close(0); close(1); close(2); /* try and use up these file descriptors, so silly library routines writing to stdout etc won't cause havoc */ for (i=0;i<3;i++) { fd = open("/dev/null",O_RDWR,0); if (fd < 0) fd = open("/dev/null",O_WRONLY,0); if (fd < 0) { DEBUG(0,("Can't open /dev/null\n")); return; } if (fd != i) { DEBUG(0,("Didn't get file descriptor %d\n",i)); return; } } } /**************************************************************************** Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available, else if SYSV use O_NDELAY if BSD use FNDELAY ****************************************************************************/ int set_blocking(int fd, BOOL set) { int val; #ifdef O_NONBLOCK #define FLAG_TO_SET O_NONBLOCK #else #ifdef SYSV #define FLAG_TO_SET O_NDELAY #else /* BSD */ #define FLAG_TO_SET FNDELAY #endif #endif if((val = fcntl(fd, F_GETFL, 0)) == -1) return -1; if(set) /* Turn blocking on - ie. clear nonblock flag */ val &= ~FLAG_TO_SET; else val |= FLAG_TO_SET; return fcntl( fd, F_SETFL, val); #undef FLAG_TO_SET } /**************************************************************************** write to a socket ****************************************************************************/ int write_socket(int fd,char *buf,int len) { int ret=0; if (passive) return(len); DEBUG(6,("write_socket(%d,%d)\n",fd,len)); ret = write_data(fd,buf,len); DEBUG(6,("write_socket(%d,%d) wrote %d\n",fd,len,ret)); return(ret); } /**************************************************************************** read from a socket ****************************************************************************/ int read_udp_socket(int fd,char *buf,int len) { int ret; struct sockaddr sock; int socklen; socklen = sizeof(sock); bzero((char *)&sock,socklen); bzero((char *)&lastip,sizeof(lastip)); ret = recvfrom(fd,buf,len,0,&sock,&socklen); if (ret <= 0) { DEBUG(2,("read socket failed. ERRNO=%d\n",errno)); return(0); } lastip = *(struct in_addr *) &sock.sa_data[2]; lastport = ntohs(((struct sockaddr_in *)&sock)->sin_port); return(ret); } /**************************************************************************** read data from a device with a timout in msec. mincount = if timeout, minimum to read before returning maxcount = number to be read. ****************************************************************************/ int read_with_timeout(int fd,char *buf,int mincnt,int maxcnt,long time_out) { fd_set fds; int selrtn; int readret; int nread = 0; struct timeval timeout; /* just checking .... */ if (maxcnt <= 0) return(0); smb_read_error = 0; /* Blocking read */ if (time_out <= 0) { if (mincnt == 0) mincnt = maxcnt; while (nread < mincnt) { readret = read(fd, buf + nread, maxcnt - nread); if (readret == 0) { smb_read_error = READ_EOF; return -1; } if (readret == -1) { smb_read_error = READ_ERROR; return -1; } nread += readret; } return(nread); } /* Most difficult - timeout read */ /* If this is ever called on a disk file and mincnt is greater then the filesize then system performance will suffer severely as select always return true on disk files */ /* Set initial timeout */ timeout.tv_sec = time_out / 1000; timeout.tv_usec = 1000 * (time_out % 1000); for (nread=0; nread0?&timeout:NULL); if (!FD_ISSET(fd,&fds)) return 0; nread = read_udp_socket(fd, buffer, bufsize); /* return the number got */ return(nread); } /******************************************************************* find the difference in milliseconds between two struct timeval values ********************************************************************/ int TvalDiff(struct timeval *tvalold,struct timeval *tvalnew) { return((tvalnew->tv_sec - tvalold->tv_sec)*1000 + ((int)tvalnew->tv_usec - (int)tvalold->tv_usec)/1000); } /**************************************************************************** send a keepalive packet (rfc1002) ****************************************************************************/ BOOL send_keepalive(int client) { unsigned char buf[4]; buf[0] = 0x85; buf[1] = buf[2] = buf[3] = 0; return(write_data(client,(char *)buf,4) == 4); } /**************************************************************************** read data from the client, reading exactly N bytes. ****************************************************************************/ int read_data(int fd,char *buffer,int N) { int ret; int total=0; smb_read_error = 0; while (total < N) { ret = read(fd,buffer + total,N - total); if (ret == 0) { smb_read_error = READ_EOF; return 0; } if (ret == -1) { smb_read_error = READ_ERROR; return -1; } total += ret; } return total; } /**************************************************************************** write data to a fd ****************************************************************************/ int write_data(int fd,char *buffer,int N) { int total=0; int ret; while (total < N) { ret = write(fd,buffer + total,N - total); if (ret == -1) return -1; if (ret == 0) return total; total += ret; } return total; } /**************************************************************************** transfer some data between two fd's ****************************************************************************/ int transfer_file(int infd,int outfd,int n,char *header,int headlen,int align) { static char *buf=NULL; static int size=0; char *buf1,*abuf; int total = 0; DEBUG(4,("transfer_file %d (head=%d) called\n",n,headlen)); if (size == 0) { size = lp_readsize(); size = MAX(size,1024); } while (!buf && size>0) { buf = (char *)Realloc(buf,size+8); if (!buf) size /= 2; } if (!buf) { DEBUG(0,("Can't allocate transfer buffer!\n")); exit(1); } abuf = buf + (align%8); if (header) n += headlen; while (n > 0) { int s = MIN(n,size); int ret,ret2=0; ret = 0; if (header && (headlen >= MIN(s,1024))) { buf1 = header; s = headlen; ret = headlen; headlen = 0; header = NULL; } else { buf1 = abuf; } if (header && headlen > 0) { ret = MIN(headlen,size); memcpy(buf1,header,ret); headlen -= ret; header += ret; if (headlen <= 0) header = NULL; } if (s > ret) ret += read(infd,buf1+ret,s-ret); if (ret > 0) { ret2 = (outfd>=0?write_data(outfd,buf1,ret):ret); if (ret2 > 0) total += ret2; /* if we can't write then dump excess data */ if (ret2 != ret) transfer_file(infd,-1,n-(ret+headlen),NULL,0,0); } if (ret <= 0 || ret2 != ret) return(total); n -= ret; } return(total); } /**************************************************************************** read 4 bytes of a smb packet and return the smb length of the packet possibly store the result in the buffer ****************************************************************************/ int read_smb_length(int fd,char *inbuf,int timeout) { char *buffer; char buf[4]; int len=0, msg_type; BOOL ok=False; if (inbuf) buffer = inbuf; else buffer = buf; while (!ok) { if (timeout > 0) ok = (read_with_timeout(fd,buffer,4,4,timeout) == 4); else ok = (read_data(fd,buffer,4) == 4); if (!ok) return(-1); len = smb_len(buffer); msg_type = CVAL(buffer,0); if (msg_type == 0x85) { DEBUG(5,("Got keepalive packet\n")); ok = False; } } DEBUG(10,("got smb length of %d\n",len)); return(len); } /**************************************************************************** read an smb from a fd and return it's length The timeout is in milli seconds ****************************************************************************/ BOOL receive_smb(int fd,char *buffer,int timeout) { int len,ret; smb_read_error = 0; bzero(buffer,smb_size + 100); len = read_smb_length(fd,buffer,timeout); if (len == -1) return(False); if (len > BUFFER_SIZE) { DEBUG(0,("Invalid packet length! (%d bytes).\n",len)); if (len > BUFFER_SIZE + (SAFETY_MARGIN/2)) exit(1); } ret = read_data(fd,buffer+4,len); if (ret != len) { smb_read_error = READ_ERROR; return False; } return(True); } /**************************************************************************** send an smb to a fd ****************************************************************************/ BOOL send_smb(int fd,char *buffer) { int len; int ret,nwritten=0; len = smb_len(buffer) + 4; while (nwritten < len) { ret = write_socket(fd,buffer+nwritten,len - nwritten); if (ret <= 0) { DEBUG(0,("Error writing %d bytes to client. %d. Exiting\n",len,ret)); close_sockets(); exit(1); } nwritten += ret; } return True; } /**************************************************************************** find a pointer to a netbios name ****************************************************************************/ char *name_ptr(char *buf,int ofs) { unsigned char c = *(unsigned char *)(buf+ofs); if ((c & 0xC0) == 0xC0) { uint16 l; char p[2]; memcpy(p,buf+ofs,2); p[0] &= ~0xC0; l = RSVAL(p,0); DEBUG(5,("name ptr to pos %d from %d is %s\n",l,ofs,buf+l)); return(buf + l); } else return(buf+ofs); } /**************************************************************************** extract a netbios name from a buf ****************************************************************************/ int name_extract(char *buf,int ofs,char *name) { char *p = name_ptr(buf,ofs); int d = PTR_DIFF(p,buf+ofs); strcpy(name,""); if (d < -50 || d > 50) return(0); return(name_interpret(p,name)); } /**************************************************************************** return the total storage length of a mangled name ****************************************************************************/ int name_len(char *s) { char *s0=s; unsigned char c = *(unsigned char *)s; if ((c & 0xC0) == 0xC0) return(2); while (*s) s += (*s)+1; return(PTR_DIFF(s,s0)+1); } /**************************************************************************** send a single packet to a port on another machine ****************************************************************************/ BOOL send_one_packet(char *buf,int len,struct in_addr ip,int port,int type) { BOOL ret; int out_fd; struct sockaddr_in sock_out; if (passive) return(True); /* create a socket to write to */ out_fd = socket(AF_INET, type, 0); if (out_fd == -1) { DEBUG(0,("socket failed")); return False; } /* set the address and port */ bzero((char *)&sock_out,sizeof(sock_out)); putip((char *)&sock_out.sin_addr,(char *)&ip); sock_out.sin_port = htons( port ); sock_out.sin_family = AF_INET; if (DEBUGLEVEL > 0) DEBUG(3,("sending a packet of len %d to (%s) on port %d of type %s\n", len,inet_ntoa(ip),port,type==SOCK_DGRAM?"DGRAM":"STREAM")); /* send it */ ret = (sendto(out_fd,buf,len,0,(struct sockaddr *)&sock_out,sizeof(sock_out)) >= 0); if (!ret) DEBUG(0,("Packet send to %s(%d) failed ERRNO=%d\n", inet_ntoa(ip),port,errno)); close(out_fd); return(ret); } /******************************************************************* sleep for a specified number of milliseconds ********************************************************************/ void msleep(int t) { int tdiff=0; struct timeval tval,t1,t2; fd_set fds; GetTimeOfDay(&t1); GetTimeOfDay(&t2); while (tdiff < t) { tval.tv_sec = (t-tdiff)/1000; tval.tv_usec = 1000*((t-tdiff)%1000); FD_ZERO(&fds); errno = 0; sys_select(&fds,&tval); GetTimeOfDay(&t2); tdiff = TvalDiff(&t1,&t2); } } /**************************************************************************** check if a string is part of a list ****************************************************************************/ BOOL in_list(char *s,char *list,BOOL casesensitive) { pstring tok; char *p=list; if (!list) return(False); while (next_token(&p,tok,LIST_SEP)) { if (casesensitive) { if (strcmp(tok,s) == 0) return(True); } else { if (StrCaseCmp(tok,s) == 0) return(True); } } return(False); } /* this is used to prevent lots of mallocs of size 1 */ static char *null_string = NULL; /**************************************************************************** set a string value, allocing the space for the string ****************************************************************************/ BOOL string_init(char **dest,char *src) { int l; if (!src) src = ""; l = strlen(src); if (l == 0) { if (!null_string) null_string = (char *)malloc(1); *null_string = 0; *dest = null_string; } else { *dest = (char *)malloc(l+1); strcpy(*dest,src); } return(True); } /**************************************************************************** free a string value ****************************************************************************/ void string_free(char **s) { if (!s || !(*s)) return; if (*s == null_string) *s = NULL; if (*s) free(*s); *s = NULL; } /**************************************************************************** set a string value, allocing the space for the string, and deallocating any existing space ****************************************************************************/ BOOL string_set(char **dest,char *src) { string_free(dest); return(string_init(dest,src)); } /**************************************************************************** substitute a string for a pattern in another string. Make sure there is enough room! This routine looks for pattern in s and replaces it with insert. It may do multiple replacements. return True if a substitution was done. ****************************************************************************/ BOOL string_sub(char *s,char *pattern,char *insert) { BOOL ret = False; char *p; int ls,lp,li; if (!insert || !pattern || !s) return(False); ls = strlen(s); lp = strlen(pattern); li = strlen(insert); if (!*pattern) return(False); while (lp <= ls && (p = strstr(s,pattern))) { ret = True; memmove(p+li,p+lp,ls + 1 - (PTR_DIFF(p,s) + lp)); memcpy(p,insert,li); s = p + li; ls = strlen(s); } return(ret); } /********************************************************* * Recursive routine that is called by mask_match. * Does the actual matching. *********************************************************/ BOOL do_match(char *str, char *regexp, int case_sig) { char *p; for( p = regexp; *p && *str; ) { switch(*p) { case '?': str++; p++; break; case '*': /* Look for a character matching the one after the '*' */ p++; if(!*p) return True; /* Automatic match */ while(*str) { while(*str && (case_sig ? (*p != *str) : (toupper(*p)!=toupper(*str)))) str++; if(do_match(str,p,case_sig)) return True; if(!*str) return False; else str++; } return False; default: if(case_sig) { if(*str != *p) return False; } else { if(toupper(*str) != toupper(*p)) return False; } str++, p++; break; } } if(!*p && !*str) return True; if (!*p && str[0] == '.' && str[1] == 0) return(True); if (!*str && *p == '?') { while (*p == '?') p++; return(!*p); } if(!*str && (*p == '*' && p[1] == '\0')) return True; return False; } /********************************************************* * Routine to match a given string with a regexp - uses * simplified regexp that takes * and ? only. Case can be * significant or not. *********************************************************/ BOOL mask_match(char *str, char *regexp, int case_sig,BOOL trans2) { char *p; pstring p1, p2; fstring ebase,eext,sbase,sext; BOOL matched; /* Make local copies of str and regexp */ StrnCpy(p1,regexp,sizeof(pstring)-1); StrnCpy(p2,str,sizeof(pstring)-1); if (!strchr(p2,'.')) { strcat(p2,"."); } /* if (!strchr(p1,'.')) { strcat(p1,"."); } */ #if 0 if (strchr(p1,'.')) { string_sub(p1,"*.*","*"); string_sub(p1,".*","*"); } #endif /* Remove any *? and ** as they are meaningless */ for(p = p1; *p; p++) while( *p == '*' && (p[1] == '?' ||p[1] == '*')) (void)strcpy( &p[1], &p[2]); if (strequal(p1,"*")) return(True); DEBUG(5,("mask_match str=<%s> regexp=<%s>, case_sig = %d\n", p2, p1, case_sig)); if (trans2) { strcpy(ebase,p1); strcpy(sbase,p2); } else { if ((p=strrchr(p1,'.'))) { *p = 0; strcpy(ebase,p1); strcpy(eext,p+1); } else { strcpy(ebase,p1); eext[0] = 0; } if (!strequal(p2,".") && !strequal(p2,"..") && (p=strrchr(p2,'.'))) { *p = 0; strcpy(sbase,p2); strcpy(sext,p+1); } else { strcpy(sbase,p2); strcpy(sext,""); } } matched = do_match(sbase,ebase,case_sig) && (trans2 || do_match(sext,eext,case_sig)); DEBUG(5,("mask_match returning %d\n", matched)); return matched; } /**************************************************************************** become a daemon, discarding the controlling terminal ****************************************************************************/ void become_daemon(void) { #ifndef NO_FORK_DEBUG if (fork()) exit(0); /* detach from the terminal */ #ifdef USE_SETSID setsid(); #else /* USE_SETSID */ #ifdef TIOCNOTTY { int i = open("/dev/tty", O_RDWR); if (i >= 0) { ioctl(i, (int) TIOCNOTTY, (char *)0); close(i); } } #endif /* TIOCNOTTY */ #endif /* USE_SETSID */ /* Close fd's 0,1,2. Needed if started by rsh */ close_low_fds(); #endif /* NO_FORK_DEBUG */ } /**************************************************************************** put up a yes/no prompt ****************************************************************************/ BOOL yesno(char *p) { pstring ans; printf("%s",p); if (!fgets(ans,sizeof(ans)-1,stdin)) return(False); if (*ans == 'y' || *ans == 'Y') return(True); return(False); } /**************************************************************************** read a line from a file with possible \ continuation chars. Blanks at the start or end of a line are stripped. The string will be allocated if s2 is NULL ****************************************************************************/ char *fgets_slash(char *s2,int maxlen,FILE *f) { char *s=s2; int len = 0; int c; BOOL start_of_line = True; if (feof(f)) return(NULL); if (!s2) { maxlen = MIN(maxlen,8); s = (char *)Realloc(s,maxlen); } if (!s || maxlen < 2) return(NULL); *s = 0; while (len < maxlen-1) { c = getc(f); switch (c) { case '\r': break; case '\n': while (len > 0 && s[len-1] == ' ') { s[--len] = 0; } if (len > 0 && s[len-1] == '\\') { s[--len] = 0; start_of_line = True; break; } return(s); case EOF: if (len <= 0 && !s2) free(s); return(len>0?s:NULL); case ' ': if (start_of_line) break; default: start_of_line = False; s[len++] = c; s[len] = 0; } if (!s2 && len > maxlen-3) { maxlen *= 2; s = (char *)Realloc(s,maxlen); if (!s) return(NULL); } } return(s); } /**************************************************************************** set the length of a file from a filedescriptor. Returns 0 on success, -1 on failure. ****************************************************************************/ int set_filelen(int fd, long len) { /* According to W. R. Stevens advanced UNIX prog. Pure 4.3 BSD cannot extend a file with ftruncate. Provide alternate implementation for this */ #if FTRUNCATE_CAN_EXTEND return ftruncate(fd, len); #else struct stat st; char c = 0; long currpos = lseek(fd, 0L, SEEK_CUR); if(currpos < 0) return -1; /* Do an fstat to see if the file is longer than the requested size (call ftruncate), or shorter, in which case seek to len - 1 and write 1 byte of zero */ if(fstat(fd, &st)<0) return -1; #ifdef S_ISFIFO if (S_ISFIFO(st.st_mode)) return 0; #endif if(st.st_size == len) return 0; if(st.st_size > len) return ftruncate(fd, len); if(lseek(fd, len-1, SEEK_SET) != len -1) return -1; if(write(fd, &c, 1)!=1) return -1; /* Seek to where we were */ lseek(fd, currpos, SEEK_SET); return 0; #endif } /**************************************************************************** return the byte checksum of some data ****************************************************************************/ int byte_checksum(char *buf,int len) { unsigned char *p = (unsigned char *)buf; int ret = 0; while (len--) ret += *p++; return(ret); } #ifdef HPUX /**************************************************************************** this is a version of setbuffer() for those machines that only have setvbuf ****************************************************************************/ void setbuffer(FILE *f,char *buf,int bufsize) { setvbuf(f,buf,_IOFBF,bufsize); } #endif /**************************************************************************** parse out a directory name from a path name. Assumes dos style filenames. ****************************************************************************/ char *dirname_dos(char *path,char *buf) { char *p = strrchr(path,'\\'); if (!p) strcpy(buf,path); else { *p = 0; strcpy(buf,path); *p = '\\'; } return(buf); } /**************************************************************************** parse out a filename from a path name. Assumes dos style filenames. ****************************************************************************/ static char *filename_dos(char *path,char *buf) { char *p = strrchr(path,'\\'); if (!p) strcpy(buf,path); else strcpy(buf,p+1); return(buf); } /**************************************************************************** expand a pointer to be a particular size ****************************************************************************/ void *Realloc(void *p,int size) { void *ret=NULL; if (size == 0) { if (p) free(p); DEBUG(5,("Realloc asked for 0 bytes\n")); return NULL; } if (!p) ret = (void *)malloc(size); else ret = (void *)realloc(p,size); if (!ret) DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",size)); return(ret); } #ifdef NOSTRDUP /**************************************************************************** duplicate a string ****************************************************************************/ char *strdup(char *s) { char *ret = NULL; if (!s) return(NULL); ret = (char *)malloc(strlen(s)+1); if (!ret) return(NULL); strcpy(ret,s); return(ret); } #endif /**************************************************************************** Signal handler for SIGPIPE (write on a disconnected socket) ****************************************************************************/ void Abort(void ) { DEBUG(0,("Probably got SIGPIPE\nExiting\n")); exit(2); } /**************************************************************************** get my own name and IP ****************************************************************************/ BOOL get_myname(char *my_name,struct in_addr *ip) { struct hostent *hp; pstring hostname; *hostname = 0; /* get my host name */ if (gethostname(hostname, MAXHOSTNAMELEN) == -1) { DEBUG(0,("gethostname failed\n")); return False; } /* get host info */ if ((hp = Get_Hostbyname(hostname)) == 0) { DEBUG(0,( "Get_Hostbyname: Unknown host %s.\n",hostname)); return False; } if (my_name) { /* split off any parts after an initial . */ char *p = strchr(hostname,'.'); if (p) *p = 0; strcpy(my_name,hostname); } if (ip) putip((char *)ip,(char *)hp->h_addr); return(True); } /**************************************************************************** true if two IP addresses are equal ****************************************************************************/ BOOL ip_equal(struct in_addr ip1,struct in_addr ip2) { uint32 a1,a2; a1 = ntohl(ip1.s_addr); a2 = ntohl(ip2.s_addr); return(a1 == a2); } /**************************************************************************** open a socket of the specified type, port and address for incoming data ****************************************************************************/ int open_socket_in(int type, int port, int dlevel,uint32 socket_addr) { struct hostent *hp; struct sockaddr_in sock; pstring host_name; int res; /* get my host name */ if (gethostname(host_name, MAXHOSTNAMELEN) == -1) { DEBUG(0,("gethostname failed\n")); return -1; } /* get host info */ if ((hp = Get_Hostbyname(host_name)) == 0) { DEBUG(0,( "Get_Hostbyname: Unknown host. %s\n",host_name)); return -1; } bzero((char *)&sock,sizeof(sock)); memcpy((char *)&sock.sin_addr,(char *)hp->h_addr, hp->h_length); #if defined(__FreeBSD__) || defined(NETBSD) /* XXX not the right ifdef */ sock.sin_len = sizeof(sock); #endif sock.sin_port = htons( port ); sock.sin_family = hp->h_addrtype; sock.sin_addr.s_addr = socket_addr; res = socket(hp->h_addrtype, type, 0); if (res == -1) { DEBUG(0,("socket failed\n")); return -1; } { int one=1; setsockopt(res,SOL_SOCKET,SO_REUSEADDR,(char *)&one,sizeof(one)); } /* now we've got a socket - we need to bind it */ if (bind(res, (struct sockaddr * ) &sock,sizeof(sock)) < 0) { if (port) { if (port == SMB_PORT || port == NMB_PORT) DEBUG(dlevel,("bind failed on port %d socket_addr=%x (%s)\n", port,socket_addr,strerror(errno))); close(res); if (dlevel > 0 && port < 1000) port = 7999; if (port >= 1000 && port < 9000) return(open_socket_in(type,port+1,dlevel,socket_addr)); } return(-1); } DEBUG(3,("bind succeeded on port %d\n",port)); return res; } /**************************************************************************** create an outgoing socket **************************************************************************/ int open_socket_out(int type, struct in_addr *addr, int port ,int timeout) { struct sockaddr_in sock_out; int res,ret; int connect_loop = 250; /* 250 milliseconds */ int loops = (timeout * 1000) / connect_loop; /* create a socket to write to */ res = socket(PF_INET, type, 0); if (res == -1) { DEBUG(0,("socket error\n")); return -1; } if (type != SOCK_STREAM) return(res); bzero((char *)&sock_out,sizeof(sock_out)); putip((char *)&sock_out.sin_addr,(char *)addr); sock_out.sin_port = htons( port ); sock_out.sin_family = PF_INET; /* set it non-blocking */ set_blocking(res,False); DEBUG(3,("Connecting to %s at port %d\n",inet_ntoa(*addr),port)); /* and connect it to the destination */ connect_again: ret = connect(res,(struct sockaddr *)&sock_out,sizeof(sock_out)); /* Some systems return EAGAIN when they mean EINPROGRESS */ if (ret < 0 && (errno == EINPROGRESS || errno == EALREADY || errno == EAGAIN) && loops--) { msleep(connect_loop); goto connect_again; } if (ret < 0 && (errno == EINPROGRESS || errno == EALREADY || errno == EAGAIN)) { DEBUG(1,("timeout connecting to %s:%d\n",inet_ntoa(*addr),port)); close(res); return -1; } #ifdef EISCONN if (ret < 0 && errno == EISCONN) { errno = 0; ret = 0; } #endif if (ret < 0) { DEBUG(1,("error connecting to %s:%d (%s)\n", inet_ntoa(*addr),port,strerror(errno))); return -1; } /* set it blocking again */ set_blocking(res,True); return res; } /**************************************************************************** interpret a protocol description string, with a default ****************************************************************************/ int interpret_protocol(char *str,int def) { if (strequal(str,"NT1")) return(PROTOCOL_NT1); if (strequal(str,"LANMAN2")) return(PROTOCOL_LANMAN2); if (strequal(str,"LANMAN1")) return(PROTOCOL_LANMAN1); if (strequal(str,"CORE")) return(PROTOCOL_CORE); if (strequal(str,"COREPLUS")) return(PROTOCOL_COREPLUS); if (strequal(str,"CORE+")) return(PROTOCOL_COREPLUS); DEBUG(0,("Unrecognised protocol level %s\n",str)); return(def); } /**************************************************************************** interpret a security level ****************************************************************************/ int interpret_security(char *str,int def) { if (strequal(str,"SERVER")) return(SEC_SERVER); if (strequal(str,"USER")) return(SEC_USER); if (strequal(str,"SHARE")) return(SEC_SHARE); DEBUG(0,("Unrecognised security level %s\n",str)); return(def); } /**************************************************************************** interpret an internet address or name into an IP address in 4 byte form ****************************************************************************/ uint32 interpret_addr(char *str) { struct hostent *hp; uint32 res; int i; BOOL pure_address = True; if (strcmp(str,"0.0.0.0") == 0) return(0); if (strcmp(str,"255.255.255.255") == 0) return(0xFFFFFFFF); for (i=0; pure_address && str[i]; i++) if (!(isdigit(str[i]) || str[i] == '.')) pure_address = False; /* if it's in the form of an IP address then get the lib to interpret it */ if (pure_address) { res = inet_addr(str); } else { /* otherwise assume it's a network name of some sort and use Get_Hostbyname */ if ((hp = Get_Hostbyname(str)) == 0) { DEBUG(3,("Get_Hostbyname: Unknown host. %s\n",str)); return 0; } putip((char *)&res,(char *)hp->h_addr); } if (res == (uint32)-1) return(0); return(res); } /******************************************************************* a convenient addition to interpret_addr() ******************************************************************/ struct in_addr *interpret_addr2(char *str) { static struct in_addr ret; uint32 a = interpret_addr(str); ret.s_addr = a; return(&ret); } /******************************************************************* check if an IP is the 0.0.0.0 ******************************************************************/ BOOL zero_ip(struct in_addr ip) { uint32 a; putip((char *)&a,(char *)&ip); return(a == 0); } /******************************************************************* matchname - determine if host name matches IP address ******************************************************************/ static BOOL matchname(char *remotehost,struct in_addr addr) { struct hostent *hp; int i; if ((hp = Get_Hostbyname(remotehost)) == 0) { DEBUG(0,("Get_Hostbyname(%s): lookup failure", remotehost)); return False; } /* * Make sure that gethostbyname() returns the "correct" host name. * Unfortunately, gethostbyname("localhost") sometimes yields * "localhost.domain". Since the latter host name comes from the * local DNS, we just have to trust it (all bets are off if the local * DNS is perverted). We always check the address list, though. */ if (strcasecmp(remotehost, hp->h_name) && strcasecmp(remotehost, "localhost")) { DEBUG(0,("host name/name mismatch: %s != %s", remotehost, hp->h_name)); return False; } /* Look up the host address in the address list we just got. */ for (i = 0; hp->h_addr_list[i]; i++) { if (memcmp(hp->h_addr_list[i], (caddr_t) & addr, sizeof(addr)) == 0) return True; } /* * The host name does not map to the original host address. Perhaps * someone has compromised a name server. More likely someone botched * it, but that could be dangerous, too. */ DEBUG(0,("host name/address mismatch: %s != %s", inet_ntoa(addr), hp->h_name)); return False; } /******************************************************************* Reset the 'done' variables so after a client process is created from a fork call these calls will be re-done. This should be expanded if more variables need reseting. ******************************************************************/ static BOOL global_client_name_done = False; static BOOL global_client_addr_done = False; void reset_globals_after_fork() { global_client_name_done = False; global_client_addr_done = False; } /******************************************************************* return the DNS name of the client ******************************************************************/ char *client_name(void) { extern int Client; struct sockaddr sa; struct sockaddr_in *sockin = (struct sockaddr_in *) (&sa); int length = sizeof(sa); static pstring name_buf; struct hostent *hp; if (global_client_name_done) return name_buf; strcpy(name_buf,"UNKNOWN"); if (getpeername(Client, &sa, &length) < 0) { DEBUG(0,("getpeername failed\n")); return name_buf; } /* Look up the remote host name. */ if ((hp = gethostbyaddr((char *) &sockin->sin_addr, sizeof(sockin->sin_addr), AF_INET)) == 0) { DEBUG(1,("Gethostbyaddr failed for %s\n",client_addr())); StrnCpy(name_buf,client_addr(),sizeof(name_buf) - 1); } else { StrnCpy(name_buf,(char *)hp->h_name,sizeof(name_buf) - 1); if (!matchname(name_buf, sockin->sin_addr)) { DEBUG(0,("Matchname failed on %s %s\n",name_buf,client_addr())); strcpy(name_buf,"UNKNOWN"); } } global_client_name_done = True; return name_buf; } /******************************************************************* return the IP addr of the client as a string ******************************************************************/ char *client_addr(void) { extern int Client; struct sockaddr sa; struct sockaddr_in *sockin = (struct sockaddr_in *) (&sa); int length = sizeof(sa); static fstring addr_buf; if (global_client_addr_done) return addr_buf; strcpy(addr_buf,"0.0.0.0"); if (getpeername(Client, &sa, &length) < 0) { DEBUG(0,("getpeername failed\n")); return addr_buf; } strcpy(addr_buf,(char *)inet_ntoa(sockin->sin_addr)); global_client_addr_done = True; return addr_buf; } /******************************************************************* sub strings with useful parameters Rewritten by Stefaan A Eeckels and Paul Rippin ********************************************************************/ void standard_sub_basic(char *string) { char *s, *p; char pidstr[10]; struct passwd *pass; for (s = string ; (p = strchr(s,'%')) != NULL ; s = p ) { switch (*(p+1)) { case 'G' : if ((pass = Get_Pwnam(sesssetup_user,False))!=NULL) string_sub(p,"%G",gidtoname(pass->pw_gid)); else p += 2; break; case 'I' : string_sub(p,"%I",client_addr()); break; case 'L' : string_sub(p,"%L",local_machine); break; case 'M' : string_sub(p,"%M",client_name()); break; case 'R' : string_sub(p,"%R",remote_proto); break; case 'T' : string_sub(p,"%T",timestring()); break; case 'U' : string_sub(p,"%U",sesssetup_user); break; case 'a' : string_sub(p,"%a",remote_arch); break; case 'd' : sprintf(pidstr,"%d",(int)getpid()); string_sub(p,"%d",pidstr); break; case 'h' : string_sub(p,"%h",myhostname); break; case 'm' : string_sub(p,"%m",remote_machine); break; case 'v' : string_sub(p,"%v",VERSION); break; case '\0' : p++; break; /* don't run off end if last character is % */ default : p+=2; break; } } return; } /******************************************************************* are two IPs on the same subnet? ********************************************************************/ BOOL same_net(struct in_addr ip1,struct in_addr ip2,struct in_addr mask) { uint32 net1,net2,nmask; nmask = ntohl(mask.s_addr); net1 = ntohl(ip1.s_addr); net2 = ntohl(ip2.s_addr); return((net1 & nmask) == (net2 & nmask)); } /******************************************************************* write a string in unicoode format ********************************************************************/ int PutUniCode(char *dst,char *src) { int ret = 0; while (*src) { dst[ret++] = src[0]; dst[ret++] = 0; src++; } dst[ret++]=0; dst[ret++]=0; return(ret); } /**************************************************************************** a wrapper for gethostbyname() that tries with all lower and all upper case if the initial name fails ****************************************************************************/ struct hostent *Get_Hostbyname(char *name) { char *name2 = strdup(name); struct hostent *ret; if (!name2) { DEBUG(0,("Memory allocation error in Get_Hostbyname! panic\n")); exit(0); } if (!isalnum(*name2)) { free(name2); return(NULL); } ret = sys_gethostbyname(name2); if (ret != NULL) { free(name2); return(ret); } /* try with all lowercase */ strlower(name2); ret = sys_gethostbyname(name2); if (ret != NULL) { free(name2); return(ret); } /* try with all uppercase */ strupper(name2); ret = sys_gethostbyname(name2); if (ret != NULL) { free(name2); return(ret); } /* nothing works :-( */ free(name2); return(NULL); } /**************************************************************************** check if a process exists. Does this work on all unixes? ****************************************************************************/ BOOL process_exists(int pid) { #ifdef LINUX fstring s; sprintf(s,"/proc/%d",pid); return(directory_exist(s,NULL)); #else { static BOOL tested=False; static BOOL ok=False; fstring s; if (!tested) { tested = True; sprintf(s,"/proc/%05d",(int)getpid()); ok = file_exist(s,NULL); } if (ok) { sprintf(s,"/proc/%05d",pid); return(file_exist(s,NULL)); } } /* CGH 8/16/96 - added ESRCH test */ return(pid == getpid() || kill(pid,0) == 0 || errno != ESRCH); #endif } /******************************************************************* turn a uid into a user name ********************************************************************/ char *uidtoname(int uid) { static char name[40]; struct passwd *pass = getpwuid(uid); if (pass) return(pass->pw_name); sprintf(name,"%d",uid); return(name); } /******************************************************************* turn a gid into a group name ********************************************************************/ char *gidtoname(int gid) { static char name[40]; struct group *grp = getgrgid(gid); if (grp) return(grp->gr_name); sprintf(name,"%d",gid); return(name); } /******************************************************************* block sigs ********************************************************************/ void BlockSignals(BOOL block,int signum) { #ifdef USE_SIGBLOCK int block_mask = sigmask(signum); static int oldmask = 0; if (block) oldmask = sigblock(block_mask); else sigsetmask(oldmask); #elif defined(USE_SIGPROCMASK) sigset_t set; sigemptyset(&set); sigaddset(&set,signum); sigprocmask(block?SIG_BLOCK:SIG_UNBLOCK,&set,NULL); #endif } #if AJT /******************************************************************* my own panic function - not suitable for general use ********************************************************************/ void ajt_panic(void) { system("/usr/bin/X11/xedit -display ljus:0 /tmp/ERROR_FAULT"); } #endif #ifdef USE_DIRECT #define DIRECT direct #else #define DIRECT dirent #endif /******************************************************************* a readdir wrapper which just returns the file name also return the inode number if requested ********************************************************************/ char *readdirname(void *p) { struct DIRECT *ptr; char *dname; if (!p) return(NULL); ptr = (struct DIRECT *)readdir(p); if (!ptr) return(NULL); dname = ptr->d_name; #ifdef NEXT2 if (telldir(p) < 0) return(NULL); #endif #ifdef SUNOS5 /* this handles a broken compiler setup, causing a mixture of BSD and SYSV headers and libraries */ { static BOOL broken_readdir = False; if (!broken_readdir && !(*(dname)) && strequal("..",dname-2)) { DEBUG(0,("Your readdir() is broken. You have somehow mixed SYSV and BSD headers and libraries\n")); broken_readdir = True; } if (broken_readdir) dname = dname - 2; } #endif { static pstring buf; strcpy(buf, dname); unix_to_dos(buf, True); dname = buf; } return(dname); } /* * Utility function used to decide if the last component * of a path matches a (possibly wildcarded) entry in a namelist. */ BOOL is_in_path(char *name, name_compare_entry *namelist) { pstring last_component; char *p; DEBUG(5, ("is_in_path: %s\n", name)); /* if we have no list it's obviously not in the path */ if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL))) { DEBUG(5,("is_in_path: no name list.\n")); return False; } /* Get the last component of the unix name. */ p = strrchr(name, '/'); strncpy(last_component, p ? p : name, sizeof(last_component)-1); last_component[sizeof(last_component)-1] = '\0'; for(; namelist->name != NULL; namelist++) { if(namelist->is_wild) { /* look for a wildcard match. */ if (mask_match(last_component, namelist->name, case_sensitive, False)) { DEBUG(5,("is_in_path: mask match succeeded\n")); return True; } } else { if((case_sensitive && (strcmp(last_component, namelist->name) == 0))|| (!case_sensitive && (StrCaseCmp(last_component, namelist->name) == 0))) { DEBUG(5,("is_in_path: match succeeded\n")); return True; } } } DEBUG(5,("is_in_path: match not found\n")); return False; } /* * Strip a '/' separated list into an array of * name_compare_enties structures suitable for * passing to is_in_path(). We do this for * speed so we can pre-parse all the names in the list * and don't do it for each call to is_in_path(). * namelist is modified here and is assumed to be * a copy owned by the caller. * We also check if the entry contains a wildcard to * remove a potentially expensive call to mask_match * if possible. */ void set_namearray(name_compare_entry **ppname_array, char *namelist) { char *name_end; char *nameptr = namelist; int num_entries = 0; int i; (*ppname_array) = NULL; if((nameptr == NULL ) || ((nameptr != NULL) && (*nameptr == '\0'))) return; /* We need to make two passes over the string. The first to count the number of elements, the second to split it. */ while (*nameptr ) { if ( *nameptr == '/' ) { /* cope with multiple (useless) /s) */ nameptr++; continue; } /* find the next / */ name_end = strchr(nameptr, '/'); /* oops - the last check for a / didn't find one. */ if (name_end == NULL) break; /* next segment please */ nameptr = name_end + 1; num_entries++; } if(num_entries == 0) return; if(( (*ppname_array) = (name_compare_entry *)malloc( (num_entries + 1) * sizeof(name_compare_entry))) == NULL) { DEBUG(0,("set_namearray: malloc fail\n")); return; } /* Now copy out the names */ nameptr = namelist; i = 0; while(*nameptr) { if ( *nameptr == '/' ) { /* cope with multiple (useless) /s) */ nameptr++; continue; } /* find the next / */ if ((name_end = strchr(nameptr, '/')) != NULL) { *name_end = 0; } /* oops - the last check for a / didn't find one. */ if (name_end == NULL) break; (*ppname_array)[i].is_wild = ((strchr( nameptr, '?')!=NULL) || (strchr( nameptr, '*')!=NULL)); if(((*ppname_array)[i].name = strdup(nameptr)) == NULL) { DEBUG(0,("set_namearray: malloc fail (1)\n")); return; } /* next segment please */ nameptr = name_end + 1; i++; } (*ppname_array)[i].name = NULL; return; } /**************************************************************************** routine to free a namearray. ****************************************************************************/ void free_namearray(name_compare_entry *name_array) { if(name_array == 0) return; if(name_array->name != NULL) free(name_array->name); free((char *)name_array); } /**************************************************************************** routine to do file locking ****************************************************************************/ BOOL fcntl_lock(int fd,int op,uint32 offset,uint32 count,int type) { #if HAVE_FCNTL_LOCK struct flock lock; int ret; #if 1 uint32 mask = 0xC0000000; /* make sure the count is reasonable, we might kill the lockd otherwise */ count &= ~mask; /* the offset is often strange - remove 2 of its bits if either of the top two bits are set. Shift the top ones by two bits. This still allows OLE2 apps to operate, but should stop lockd from dieing */ if ((offset & mask) != 0) offset = (offset & ~mask) | ((offset & mask) >> 2); #else uint32 mask = ((unsigned)1<<31); /* interpret negative counts as large numbers */ if (count < 0) count &= ~mask; /* no negative offsets */ offset &= ~mask; /* count + offset must be in range */ while ((offset < 0 || (offset + count < 0)) && mask) { offset &= ~mask; mask = mask >> 1; } #endif DEBUG(5,("fcntl_lock %d %d %d %d %d\n",fd,op,(int)offset,(int)count,type)); lock.l_type = type; lock.l_whence = SEEK_SET; lock.l_start = (int)offset; lock.l_len = (int)count; lock.l_pid = 0; errno = 0; ret = fcntl(fd,op,&lock); if (errno != 0) DEBUG(3,("fcntl lock gave errno %d (%s)\n",errno,strerror(errno))); /* a lock query */ if (op == F_GETLK) { if ((ret != -1) && (lock.l_type != F_UNLCK) && (lock.l_pid != 0) && (lock.l_pid != getpid())) { DEBUG(3,("fd %d is locked by pid %d\n",fd,lock.l_pid)); return(True); } /* it must be not locked or locked by me */ return(False); } /* a lock set or unset */ if (ret == -1) { DEBUG(3,("lock failed at offset %d count %d op %d type %d (%s)\n", offset,count,op,type,strerror(errno))); /* perhaps it doesn't support this sort of locking?? */ if (errno == EINVAL) { DEBUG(3,("locking not supported? returning True\n")); return(True); } return(False); } /* everything went OK */ DEBUG(5,("Lock call successful\n")); return(True); #else return(False); #endif } /******************************************************************* lock a file - returning a open file descriptor or -1 on failure The timeout is in seconds. 0 means no timeout ********************************************************************/ int file_lock(char *name,int timeout) { int fd = open(name,O_RDWR|O_CREAT,0666); time_t t=0; if (fd < 0) return(-1); #if HAVE_FCNTL_LOCK if (timeout) t = time(NULL); while (!timeout || (time(NULL)-t < timeout)) { if (fcntl_lock(fd,F_SETLK,0,1,F_WRLCK)) return(fd); msleep(LOCK_RETRY_TIMEOUT); } return(-1); #else return(fd); #endif } /******************************************************************* unlock a file locked by file_lock ********************************************************************/ void file_unlock(int fd) { if (fd<0) return; #if HAVE_FCNTL_LOCK fcntl_lock(fd,F_SETLK,0,1,F_UNLCK); #endif close(fd); } /******************************************************************* is the name specified one of my netbios names returns true is it is equal, false otherwise ********************************************************************/ BOOL is_myname(const char *s) { int n; BOOL ret = False; for (n=0; my_netbios_names[n]; n++) { if (strequal(my_netbios_names[n], s)) ret=True; } DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret)); return(ret); }