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-rw-r--r--source3/libsmb/namequery.c263
1 files changed, 263 insertions, 0 deletions
diff --git a/source3/libsmb/namequery.c b/source3/libsmb/namequery.c
index 207f064670..6bf41b9f9e 100644
--- a/source3/libsmb/namequery.c
+++ b/source3/libsmb/namequery.c
@@ -25,6 +25,8 @@
extern pstring scope;
extern int DEBUGLEVEL;
+/* nmbd.c sets this to True. */
+BOOL global_in_nmbd = False;
/****************************************************************************
interpret a node status response
@@ -303,3 +305,264 @@ struct in_addr *name_query(int fd,char *name,int name_type,
return ip_list;
}
+
+/********************************************************
+ Start parsing the lmhosts file.
+*********************************************************/
+
+FILE *startlmhosts(char *fname)
+{
+ FILE *fp = fopen(fname,"r");
+ if (!fp) {
+ DEBUG(2,("startlmhosts: Can't open lmhosts file %s. Error was %s\n",
+ fname, strerror(errno)));
+ return NULL;
+ }
+ return fp;
+}
+
+/********************************************************
+ Parse the next line in the lmhosts file.
+*********************************************************/
+
+BOOL getlmhostsent( FILE *fp, char *name, int *name_type, struct in_addr *ipaddr)
+{
+ pstring line;
+
+ while(!feof(fp) && !ferror(fp)) {
+ pstring ip,flags,extra;
+ char *ptr;
+ int count = 0;
+
+ *name_type = -1;
+
+ if (!fgets_slash(line,sizeof(pstring),fp))
+ continue;
+
+ if (*line == '#')
+ continue;
+
+ strcpy(ip,"");
+ strcpy(name,"");
+ strcpy(flags,"");
+
+ ptr = line;
+
+ if (next_token(&ptr,ip ,NULL))
+ ++count;
+ if (next_token(&ptr,name ,NULL))
+ ++count;
+ if (next_token(&ptr,flags,NULL))
+ ++count;
+ if (next_token(&ptr,extra,NULL))
+ ++count;
+
+ if (count <= 0)
+ continue;
+
+ if (count > 0 && count < 2)
+ {
+ DEBUG(0,("getlmhostsent: Ill formed hosts line [%s]\n",line));
+ continue;
+ }
+
+ if (count >= 4)
+ {
+ DEBUG(0,("getlmhostsent: too many columns in lmhosts file (obsolete syntax)\n"));
+ continue;
+ }
+
+ DEBUG(4, ("getlmhostsent: lmhost entry: %s %s %s\n", ip, name, flags));
+
+ if (strchr(flags,'G') || strchr(flags,'S'))
+ {
+ DEBUG(0,("getlmhostsent: group flag in lmhosts ignored (obsolete)\n"));
+ continue;
+ }
+
+ *ipaddr = *interpret_addr2(ip);
+
+ /* Extra feature. If the name ends in '#XX', where XX is a hex number,
+ then only add that name type. */
+ if((ptr = strchr(name, '#')) != NULL)
+ {
+ char *endptr;
+
+ ptr++;
+ *name_type = (int)strtol(ptr, &endptr,0);
+
+ if(!*ptr || (endptr == ptr))
+ {
+ DEBUG(0,("getlmhostsent: invalid name %s containing '#'.\n", name));
+ continue;
+ }
+
+ *(--ptr) = '\0'; /* Truncate at the '#' */
+ }
+
+ return True;
+ }
+
+ return False;
+}
+
+/********************************************************
+ Finish parsing the lmhosts file.
+*********************************************************/
+
+void endlmhosts(FILE *fp)
+{
+ fclose(fp);
+}
+
+/********************************************************
+ Resolve a name into an IP address. Use this function if
+ the string is either an IP address, DNS or host name
+ or NetBIOS name. This uses the name switch in the
+ smb.conf to determine the order of name resolution.
+*********************************************************/
+
+BOOL resolve_name(char *name, struct in_addr *return_ip)
+{
+ char *p;
+ int i;
+ BOOL pure_address = True;
+
+ if (strcmp(name,"0.0.0.0") == 0) {
+ return_ip->s_addr = 0;
+ return True;
+ }
+ if (strcmp(name,"255.255.255.255") == 0) {
+ return_ip->s_addr = 0xFFFFFFFF;
+ return True;
+ }
+
+ for (i=0; pure_address && name[i]; i++)
+ if (!(isdigit(name[i]) || name[i] == '.'))
+ pure_address = False;
+
+ /* if it's in the form of an IP address then get the lib to interpret it */
+ if (pure_address) {
+ return_ip->s_addr = inet_addr(name);
+ return True;
+ }
+
+ for (p=strtok(lp_name_resolve_order(),LIST_SEP); p; p = strtok(NULL,LIST_SEP)) {
+ if(strequal(p, "host") || strequal(p, "hosts")) {
+
+ /*
+ * "host" means do a localhost, or dns lookup.
+ */
+
+ struct hostent *hp;
+
+ DEBUG(3,("resolve_name: Attempting host lookup for name %s\n"));
+
+ if (((hp = Get_Hostbyname(name)) != NULL) && (hp->h_addr != NULL)) {
+ putip((char *)return_ip,(char *)hp->h_addr);
+ return True;
+ }
+
+ } else if(strequal( p, "lmhosts")) {
+
+ /*
+ * "lmhosts" means parse the local lmhosts file.
+ */
+
+ FILE *fp;
+ pstring lmhost_name;
+ int name_type;
+
+ DEBUG(3,("resolve_name: Attempting lmhosts lookup for name %s\n"));
+
+ fp = startlmhosts( LMHOSTSFILE );
+ if(fp) {
+ while( getlmhostsent(fp, lmhost_name, &name_type, return_ip ) ) {
+ if( strequal(name, lmhost_name )) {
+ endlmhosts(fp);
+ return True;
+ }
+ }
+ endlmhosts(fp);
+ }
+
+ } else if(strequal( p, "wins")) {
+
+ int sock;
+
+ /*
+ * "wins" means do a unicast lookup to the WINS server.
+ * Ignore if there is no WINS server specified or if the
+ * WINS server is one of our interfaces (if we're being
+ * called from within nmbd - we can't do this call as we
+ * would then block).
+ */
+
+ DEBUG(3,("resolve_name: Attempting wins lookup for name %s\n"));
+
+ if(*lp_wins_server()) {
+ struct in_addr wins_ip = *interpret_addr2(lp_wins_server());
+ BOOL wins_ismyip = ismyip(wins_ip);
+
+ if((wins_ismyip && !global_in_nmbd) || !wins_ismyip) {
+ sock = open_socket_in( SOCK_DGRAM, 0, 3,
+ interpret_addr(lp_socket_address()) );
+
+ if (sock != -1) {
+ struct in_addr *iplist = NULL;
+ int count;
+ iplist = name_query(sock, name, 0x20, False, True, wins_ip, &count, NULL);
+ if(iplist != NULL) {
+ *return_ip = iplist[0];
+ free((char *)iplist);
+ close(sock);
+ return True;
+ }
+ close(sock);
+ }
+ }
+ } else {
+ DEBUG(3,("resolve_name: WINS server resolution selected and no WINS server present.\n"));
+ }
+ } else if(strequal( p, "bcast")) {
+
+ int sock;
+
+ /*
+ * "bcast" means do a broadcast lookup on all the local interfaces.
+ */
+
+ DEBUG(3,("resolve_name: Attempting broadcast lookup for name %s\n"));
+
+ sock = open_socket_in( SOCK_DGRAM, 0, 3,
+ interpret_addr(lp_socket_address()) );
+
+ if (sock != -1) {
+ struct in_addr *iplist = NULL;
+ int count;
+ int num_interfaces = iface_count();
+ set_socket_options(sock,"SO_BROADCAST");
+ /*
+ * Lookup the name on all the interfaces, return on
+ * the first successful match.
+ */
+ for( i = 0; i < num_interfaces; i++) {
+ struct in_addr sendto_ip = *iface_bcast(*iface_n_ip(i));
+ iplist = name_query(sock, name, 0x20, True, False, sendto_ip, &count, NULL);
+ if(iplist != NULL) {
+ *return_ip = iplist[0];
+ free((char *)iplist);
+ close(sock);
+ return True;
+ }
+ }
+ close(sock);
+ }
+
+ } else {
+ DEBUG(0,("resolve_name: unknown name switch type %s\n", p));
+ }
+ }
+
+ return False;
+}
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