packages/net/olsrd/patches/130-olsrd-nameservice+services.patch

diff -Nur olsrd-0.4.10.orig/lib/nameservice/src/nameservice.c olsrd-0.4.10/lib/nameservice/src/nameservice.c
--- olsrd-0.4.10.orig/lib/nameservice/src/nameservice.c	2005-05-29 14:47:42.000000000 +0200
+++ olsrd-0.4.10/lib/nameservice/src/nameservice.c	2006-12-01 08:26:58.000000000 +0100
@@ -1,4 +1,5 @@
 /*
+ * Copyright (c) 2006, Jens Nachtigall <nachtigall@web.de>
  * Copyright (c) 2005, Bruno Randolf <bruno.randolf@4g-systems.biz>
  * Copyright (c) 2004, Andreas Tønnesen(andreto-at-olsr.org)
  * All rights reserved.
@@ -39,6 +40,9 @@
 #include <string.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <ctype.h>
+#include <sys/types.h>
+#include <regex.h>
 
 #include "olsr.h"
 #include "net_olsr.h"
@@ -53,6 +57,7 @@
 #include "olsrd_copy.h"
 #include "compat.h"
 
+
 /* send buffer: huge */
 static char buffer[10240];
 
@@ -62,15 +67,35 @@
 static char my_suffix[MAX_SUFFIX];
 static int my_interval = EMISSION_INTERVAL;
 static double my_timeout = NAME_VALID_TIME;
-static olsr_bool have_dns_server = OLSR_FALSE;
-static union olsr_ip_addr my_dns_server;
 static char my_resolv_file[MAX_FILE +1];
+static char my_services_file[MAX_FILE + 1];
 
-/* the database (using hashing) */
+/* the databases (using hashing)
+ * for hostnames, service_lines and dns-servers
+ *
+ * my own hostnames, service_lines and dns-servers
+ * are store in a linked list (without hashing)
+ * */
 struct db_entry* list[HASHSIZE];
 struct name_entry *my_names = NULL;
 olsr_bool name_table_changed = OLSR_TRUE;
 
+struct db_entry* service_list[HASHSIZE];
+struct name_entry *my_services = NULL;
+olsr_bool service_table_changed = OLSR_TRUE;
+
+struct db_entry* forwarder_list[HASHSIZE];
+struct name_entry *my_forwarders = NULL;
+olsr_bool forwarder_table_changed = OLSR_TRUE;
+
+/* regualar expression to be matched by valid hostnames, compiled in name_init() */
+regex_t regex_t_name;
+regmatch_t regmatch_t_name;
+
+/* regualar expression to be matched by valid service_lines, compiled in name_init() */
+regex_t regex_t_service;
+int pmatch_service = 10;
+regmatch_t regmatch_t_service[10];
 
 /**
  * do initialization
@@ -84,27 +109,39 @@
 	int len;
 
 	GetWindowsDirectory(my_hosts_file, MAX_FILE - 12);
+	GetWindowsDirectory(my_services_file, MAX_FILE - 12);
 
 	len = strlen(my_hosts_file);
- 
 	if (my_hosts_file[len - 1] != '\\')
  		my_hosts_file[len++] = '\\';
- 
 	strcpy(my_hosts_file + len, "hosts_olsr");
+	
+    len = strlen(my_services_file);
+	if (my_services_file[len - 1] != '\\')
+ 		my_services_file[len++] = '\\';
+	strcpy(my_services_file + len, "services_olsr");
+
+    len = strlen(my_resolv_file);
+	if (my_resolv_file[len - 1] != '\\')
+ 		my_resolv_file[len++] = '\\';
+	strcpy(my_resolv_file + len, "resolvconf_olsr");
 #else
 	strcpy(my_hosts_file, "/var/run/hosts_olsr");
+	strcpy(my_services_file, "/var/run/services_olsr");
+	strcpy(my_resolv_file, "/var/run/resolvconf_olsr");
 #endif
 
 	my_suffix[0] = '\0';
 	my_add_hosts[0] = '\0';
-	my_resolv_file[0] = '\0';
 	
-	/* init list */
+	/* init lists */
 	for(i = 0; i < HASHSIZE; i++) {
 		list[i] = NULL;
+		forwarder_list[i] = NULL;
+        service_list[i] = NULL;
 	}
 	
-	memset(&my_dns_server, 0, sizeof(my_dns_server));
+
 }
 
 
@@ -116,56 +153,53 @@
 {
 	if(!strcmp(key, "interval")) {
 		my_interval = atoi(value);
-		printf("\nNAME PLUGIN: parameter interval: %d\n", my_interval);
+		olsr_printf(1,"\nNAME PLUGIN: parameter interval: %d", my_interval);
 	}
 	else if(!strcmp(key, "timeout")) {
 		my_timeout = atof(value);
-		printf("\nNAME PLUGIN: parameter timeout: %f\n", my_timeout);
+		olsr_printf(1,"\nNAME PLUGIN: parameter timeout: %f", my_timeout);
 	} 
 	else if(!strcmp(key, "hosts-file")) {
 		strncpy( my_hosts_file, value, MAX_FILE );
-		printf("\nNAME PLUGIN: parameter filename: %s\n", my_hosts_file);
+		olsr_printf(1,"\nNAME PLUGIN: parameter filename: %s", my_hosts_file);
 	}
 	else if(!strcmp(key, "resolv-file")) {
 		strncpy(my_resolv_file, value, MAX_FILE);
-		printf("\nNAME PLUGIN: parameter resolv file: %s\n", my_resolv_file);
+		olsr_printf(1,"\nNAME PLUGIN: parameter resolv-file: %s", my_resolv_file);
 	}
 	else if(!strcmp(key, "suffix")) {
 		strncpy(my_suffix, value, MAX_SUFFIX);
-		printf("\nNAME PLUGIN: parameter suffix: %s\n", my_suffix);
+		olsr_printf(1,"\nNAME PLUGIN: parameter suffix: %s", my_suffix);
 	}
 	else if(!strcmp(key, "add-hosts")) {
 		strncpy(my_add_hosts, value, MAX_FILE);
-		printf("\nNAME PLUGIN: parameter additional host: %s\n", my_add_hosts);
+		olsr_printf(1,"\nNAME PLUGIN: parameter additional host: %s", my_add_hosts);
+	}
+	else if(!strcmp(key, "services-file")) {
+		strncpy(my_services_file, value, MAX_FILE);
+		olsr_printf(1,"\nNAME PLUGIN: parameter services-file: %s", my_services_file);
 	}
 	else if(!strcmp(key, "dns-server")) {
 		struct in_addr ip;
 		if (strlen(value) == 0) {
-			// set dns server ip to main address
-			// which is not known yet
-			have_dns_server = OLSR_TRUE;
-		}
-		else if (inet_aton(value, &ip)) {
-			my_dns_server.v4 = ip.s_addr;
-			have_dns_server = OLSR_TRUE;
-		}
-		else {
-			printf("\nNAME PLUGIN: invalid dns-server IP %s\n", value);
-		}
+            my_forwarders = add_name_to_list(my_forwarders, "", NAME_FORWARDER, NULL);
+            olsr_printf(1,"\nNAME PLUGIN: parameter dns-server: (main address)");
+        } else if (inet_aton(value, &ip)) {
+            my_forwarders = add_name_to_list(my_forwarders, "", NAME_FORWARDER, &ip);
+            olsr_printf(1,"\nNAME PLUGIN: parameter dns-server: (%s)", value);
+        } else {
+            olsr_printf(1,"\nNAME PLUGIN: invalid parameter dns-server: %s ", value);
+        }
 	}
 	else if(!strcmp(key, "name")) {
 		// name for main address
-		struct name_entry *tmp;
-		tmp = malloc(sizeof(struct name_entry));
-		tmp->name = strndup( value, MAX_NAME );
-		tmp->len = strlen( tmp->name );
-		tmp->type = NAME_HOST;
-		// will be set to main_addr later
-		memset(&tmp->ip, 0, sizeof(tmp->ip));
-		tmp->next = my_names;
-		my_names = tmp;
-		
-		printf("\nNAME PLUGIN: parameter name: %s (main address)\n", tmp->name);
+        my_names = add_name_to_list(my_names, value, NAME_HOST, NULL);
+        olsr_printf(1,"\nNAME PLUGIN: parameter name: %s (main address)", value);
+	}
+	else if(!strcmp(key, "service")) {
+		// name for main address
+        my_services = add_name_to_list(my_services, value, NAME_SERVICE, NULL);
+        olsr_printf(1,"\nNAME PLUGIN: parameter service: %s (main address)", value);
 	}
 	else {
 		// assume this is an IP address and hostname
@@ -173,33 +207,46 @@
 		
 		if (inet_aton(key, &ip)) {
 			// the IP is validated later
-			struct name_entry *tmp;
-			tmp = malloc(sizeof(struct name_entry));
-			tmp->name = strndup( value, MAX_NAME );
-			tmp->len = strlen( tmp->name );
-			tmp->type = NAME_HOST;
-			tmp->ip.v4 = ip.s_addr;
-			tmp->next = my_names;
-			my_names = tmp;
-			printf("\nNAME PLUGIN: parameter %s (%s)\n", tmp->name,
-				olsr_ip_to_string(&tmp->ip));
+            my_names = add_name_to_list(my_names, value, NAME_HOST, &ip);
+			olsr_printf(1,"\nNAME PLUGIN: parameter name %s (%s)", value, key);
 		} 
 		else {
-			printf("\nNAME PLUGIN: invalid IP %s for name %s!\n", key, value);
+			olsr_printf(1,"\nNAME PLUGIN: invalid parameter name: %s (%s)!", value, key);
 		}
 	}
 
 	return 1;
 }
 
+/**
+ * queue the name/forwarder/service given in value
+ * to the front of my_list
+ */
+struct name_entry* 
+add_name_to_list(struct name_entry *my_list, char *value, int type, struct in_addr *ip) 
+{
+		struct name_entry *tmp;
+		tmp = olsr_malloc(sizeof(struct name_entry), "new name_entry add_name_to_list");
+        tmp->name = strndup( value, MAX_NAME );
+        tmp->len = strlen( tmp->name );
+        tmp->type = type;
+        // all IPs with value 0 will be set to main_addr later
+        if (ip==NULL) 
+            memset(&tmp->ip, 0, sizeof(tmp->ip));
+        else
+            tmp->ip.v4 = ip->s_addr;
+        tmp->next = my_list;
+        return tmp;
+}
+
 
 /**
  * last initialization
  *
  * we have to do this here because some things like main_addr 
- * are not known before
+ * or the dns suffix (for validation) are not known before
  *
- * this is beause of the order in which the plugin is initzalized 
+ * this is beause of the order in which the plugin is initialized 
  * by the plugin loader:
  *   - first the parameters are sent
  *   - then register_olsr_data() from olsrd_plugin.c is called
@@ -210,50 +257,78 @@
 name_init()
 {
 	struct name_entry *name;
-	struct name_entry *prev=NULL;
-
-	/* fixup names and IP addresses */
+    int ret;
+    //regex string for validating the hostnames
+    char *regex_name = "^[[:alnum:]_.-]+$";
+    //regex string for the service line
+    char *regex_service = olsr_malloc(256*sizeof(char) + strlen(my_suffix), "new *char from name_init for regex_service");
+
+    //compile the regex from the string
+	if ((ret = regcomp(&regex_t_name, regex_name , REG_EXTENDED)) != 0)
+    {
+		/* #2: call regerror() if regcomp failed 
+         * commented out, because only for debuggin needed
+         *
+        int errmsgsz = regerror(ret, &regex_t_name, NULL, 0);
+        char *errmsg = malloc(errmsgsz);
+        regerror(ret, &regex_t_name, errmsg, errmsgsz);
+        fprintf(stderr, "regcomp: %s", errmsg);
+        free(errmsg);
+        regfree(&regex_t_name);
+         * */
+        olsr_printf(0, "compilation of regex \"%s\" for hostname failed", regex_name);
+	}
+                  
+  // a service line is something like prot://hostname.suffix:port|tcp|my little description about this service
+  //                  for example     http://router.olsr:80|tcp|my homepage
+  //                     prot     ://  (hostname.suffix     OR         ip)
+  //regex_service = "^[[:alnum:]]+://(([[:alnum:]_.-]+.olsr)|([[:digit:]]{1,3}\\.[[:digit:]]{1,3}\\.[[:digit:]]{1,3}\\.[[:digit:]]{1,3}))
+  //                 :    port              /path      |(tcp OR udp) |short description
+  //                 :[[:digit:]]+[[:alnum:]/?._=#-]*\\|(tcp|udp)\\|[^|[:cntrl:]]+$";
+  strcat (strcat (strcat(regex_service, "^[[:alnum:]]+://(([[:alnum:]_.-]+"),
+                  my_suffix),
+          ")|([[:digit:]]{1,3}\\.[[:digit:]]{1,3}\\.[[:digit:]]{1,3}\\.[[:digit:]]{1,3})):[[:digit:]]+[[:alnum:]/?._=#-]*\\|(tcp|udp)\\|[^|[:cntrl:]]+$");
+
+    	/* #1: call regcomp() to compile the regex */
+	if ((ret = regcomp(&regex_t_service, regex_service , REG_EXTENDED )) != 0)
+    {
+		/* #2: call regerror() if regcomp failed 
+         * commented out, because only for debuggin needed
+         *
+		int errmsgsz = regerror(ret, &regex_t_service, NULL, 0);
+		char *errmsg = malloc(errmsgsz);
+		regerror(ret, &regex_t_service, errmsg, errmsgsz);
+		fprintf(stderr, "regcomp: %s", errmsg);
+		free(errmsg);
+		regfree(&regex_t_service);
+         * */
+        olsr_printf(0, "compilation of regex \"%s\" for hostname failed", regex_name);
+	}
+    free(regex_service);
+    regex_service = NULL;
+
+    //fill in main addr for all entries with ip==0
+    //this does not matter for service, because the ip does not matter
+    //for service
 	for (name = my_names; name != NULL; name = name->next) {
-		if (name->ip.v4 == 0) {
-			// insert main_addr
+        if (name->ip.v4 == 0) {
+            olsr_printf(2, "NAME PLUGIN: insert main addr for name %s \n", name->name);
 			memcpy(&name->ip, &main_addr, ipsize);
-			prev = name;
-		} else {
-			// IP from config file
-			// check if we are allowed to announce a name for this IP
-			// we can only do this if we also announce the IP	 
-			if (!allowed_ip(&name->ip)) {
-				olsr_printf(1, "NAME PLUGIN: name for unknown IP %s not allowed, fix your config!\n", 
-					olsr_ip_to_string(&name->ip));
-				if (prev!=NULL) {
-					prev->next = name->next;
-					free(name->name);
-					free(name);
-				}
-			}
-			else {
-				prev = name;
-			}
-		}
-	}
+        }
+    }
+	for (name = my_forwarders; name != NULL; name = name->next) {
+        if (name->ip.v4 == 0) {
+            olsr_printf(2, "NAME PLUGIN: insert main addr for name %s \n", name->name);
+			memcpy(&name->ip, &main_addr, ipsize);
+        }
+    }
+
+    //check if entries I want to announce myself are valid and allowed
+    my_names = remove_nonvalid_names_from_list(my_names, NAME_HOST);
+    my_forwarders = remove_nonvalid_names_from_list(my_forwarders, NAME_FORWARDER);
+    my_services = remove_nonvalid_names_from_list(my_services, NAME_SERVICE);
+
 		
-	if (have_dns_server) {
-		if (my_dns_server.v4 == 0) {
-			memcpy(&my_dns_server, &main_addr, ipsize);
-			printf("\nNAME PLUGIN: announcing upstream DNS server: %s\n", 
-				olsr_ip_to_string(&my_dns_server));
-		}
-		else if (!allowed_ip(&my_dns_server)) {
-			printf("NAME PLUGIN: announcing DNS server on unknown IP %s is not allowed, fix your config!\n", 
-				olsr_ip_to_string(&my_dns_server));
-			memset(&my_dns_server, 0, sizeof(my_dns_server));
-			have_dns_server = OLSR_FALSE;
-		}
-		else {
-			printf("\nNAME PLUGIN: announcing upstream DNS server: %s\n", 
-				olsr_ip_to_string(&my_dns_server));
-		}
-	}
 	
 	/* register functions with olsrd */
 	olsr_parser_add_function(&olsr_parser, PARSER_TYPE, 1);
@@ -263,22 +338,75 @@
 	return 1;
 }
 
+struct name_entry*
+remove_nonvalid_names_from_list(struct name_entry *my_list, int type) 
+{
+    struct name_entry *next = my_list;
+    olsr_bool valid = OLSR_FALSE;
+    if (my_list == NULL) {
+        return NULL;
+    } 
+
+    switch (type) {
+        case NAME_HOST:
+            valid = is_name_wellformed(my_list->name) && allowed_ip(&my_list->ip); 
+            break;
+        case NAME_FORWARDER:
+            valid = allowed_ip(&my_list->ip);
+            break;
+        case NAME_SERVICE:
+            valid = allowed_service(my_list->name);
+            break;
+    }
+    
+    if ( !valid  ) {
+        olsr_printf(1, "NAME PLUGIN: invalid or malformed parameter %s (%s), fix your config!\n", my_list->name, olsr_ip_to_string(&my_list->ip));
+        next = my_list->next;
+        free(my_list->name);
+        my_list->name = NULL;
+        free(my_list);
+        my_list = NULL;
+        return remove_nonvalid_names_from_list(next, type);
+    } else {
+        olsr_printf(2, "NAME PLUGIN: validate parameter %s (%s) -> OK\n", my_list->name, olsr_ip_to_string(&my_list->ip));
+        my_list->next = remove_nonvalid_names_from_list(my_list->next, type);
+        return my_list;    
+    }
+}
+
+
 
 /**
  * called at unload: free everything
+ *
+ * XXX: should I delete the hosts/services/resolv.conf files on exit?
  */
 void
 name_destructor()
 {
-	int i;
-	struct db_entry **tmp;
-	struct db_entry *to_delete;
-	
 	olsr_printf(2, "NAME PLUGIN: exit. cleaning up...\n");
 	
 	free_name_entry_list(&my_names);
+	free_name_entry_list(&my_services);
+	free_name_entry_list(&my_forwarders);
+
+    free_all_list_entries(list);
+    free_all_list_entries(service_list);
+    free_all_list_entries(forwarder_list);
+
+    regfree(&regex_t_name);
+    regfree(&regex_t_service);
+	
+}
+
+/* free all list entries */
+void 
+free_all_list_entries(struct db_entry **this_db_list) 
+{
+	int i;
+	struct db_entry **tmp;
+	struct db_entry *to_delete;
 	
-	/* free list entries */
 	for(i = 0; i < HASHSIZE; i++)
 	{
 		tmp = &list[i];
@@ -296,24 +424,41 @@
 
 /**
  * A timeout function called every time
- * the scheduler is polled: time out old list entries
+ *
+ * XXX:the scheduler is polled (by default 10 times a sec,
+ * which is far too often):
+ *
+ * time out old list entries
  * and write changes to file
  */
 void
 olsr_timeout()
 {
+    timeout_old_names(list, &name_table_changed);
+    timeout_old_names(forwarder_list, &forwarder_table_changed);
+    timeout_old_names(service_list, &service_table_changed);
+     
+	write_resolv_file();
+	write_hosts_file();
+	write_services_file();
+}
+
+void
+timeout_old_names(struct db_entry **this_list, olsr_bool *this_table_changed)
+{
 	struct db_entry **tmp;
 	struct db_entry *to_delete;
 	int index;
 
 	for(index=0;index<HASHSIZE;index++)
 	{
-		for (tmp = &list[index]; *tmp != NULL; )
+		for (tmp = &this_list[index]; *tmp != NULL; )
 		{
-			/* check if the entry is timed out */
+			/* check if the entry for this ip is timed out */
 			if (olsr_timed_out(&(*tmp)->timer))
 			{
 				to_delete = *tmp;
+                /* update the pointer in the linked list */
 				*tmp = (*tmp)->next;
 				
 				olsr_printf(2, "NAME PLUGIN: %s timed out... deleting\n", 
@@ -322,17 +467,17 @@
 				/* Delete */
 				free_name_entry_list(&to_delete->names);
 				free(to_delete);
-				name_table_changed = OLSR_TRUE;
+				*this_table_changed = OLSR_TRUE;
 			} else {
 				tmp = &(*tmp)->next;
 			}
 		}
 	}
-	write_resolv_file();
-	write_hosts_file();
 }
 
 
+
+
 /**
  * Scheduled event: generate and send NAME packet
  */
@@ -429,21 +574,19 @@
 		return;
 	}
 
-	/* Check if this message has been processed before
-	* Remeber that this also registeres the message as
+	/* Check if this message has not been processed before
+	* Remember that this also registers the message as
 	* processed if nessecary
 	*/
-	if(!olsr_check_dup_table_proc(&originator, ntohs(m->v4.seqno))) {
-		/* If so - do not process */
-		goto forward;
-	}
-
-	update_name_entry(&originator, namemessage, size, vtime);
+	if(olsr_check_dup_table_proc(&originator, ntohs(m->v4.seqno))) {
+		/* If not already processed - do so */
+        update_name_entry(&originator, namemessage, size, vtime);
+	} 
+    
+    /* Forward the message if nessecary
+    * default_fwd does all the work for us! */
+    olsr_forward_message(m, &originator, ntohs(m->v4.seqno), in_if, in_addr);
 
-forward:
-	/* Forward the message if nessecary
-	* default_fwd does all the work for us! */
-	olsr_forward_message(m, &originator, ntohs(m->v4.seqno), in_if, in_addr);
 }
 
 
@@ -457,152 +600,224 @@
 int
 encap_namemsg(struct namemsg* msg)
 {
-	struct name_entry *my_name = my_names;
-	struct name* to_packet;
+	struct name_entry *my_name;
+	struct name_entry *my_service;
+
+    // add the hostname, service and forwarder entries after the namemsg header
 	char* pos = (char*)msg + sizeof(struct namemsg);
 	short i=0;
-        int k;
-	
-	// upstream dns server
-	if (have_dns_server) {
-		olsr_printf(3, "NAME PLUGIN: Announcing DNS server (%s)\n", 
-			olsr_ip_to_string(&my_dns_server));
-		to_packet = (struct name*)pos;
-		to_packet->type = htons(NAME_FORWARDER);
-		to_packet->len = htons(0);
-		memcpy(&to_packet->ip, &my_dns_server, ipsize);
-		pos += sizeof(struct name);
-		i++;
-	}
+
 
 	// names
 	for (my_name = my_names; my_name!=NULL; my_name = my_name->next)
 	{
-		olsr_printf(3, "NAME PLUGIN: Announcing name %s (%s) %d\n", 
-			my_name->name, olsr_ip_to_string(&my_name->ip), my_name->len);
-			
-		to_packet = (struct name*)pos;
-		to_packet->type = htons(my_name->type);
-		to_packet->len = htons(my_name->len);
-		memcpy(&to_packet->ip, &my_name->ip, ipsize);
-		pos += sizeof(struct name);
-		strncpy(pos, my_name->name, my_name->len);
-		pos += my_name->len;
-		// padding to 4 byte boundaries
-                for (k = my_name->len; (k & 3) != 0; k++)
-			*pos++ = '\0';
+        pos = create_packet( (struct name*) pos, my_name);
 		i++;
 	}
+	// forwarders
+	for (my_name = my_forwarders; my_name!=NULL; my_name = my_name->next)
+	{
+        pos = create_packet( (struct name*) pos, my_name);
+		i++;
+	}
+	// services
+	for (my_service = my_services; my_service!=NULL; my_service = my_service->next)
+	{
+        pos = create_packet( (struct name*) pos, my_service);
+		i++;
+	}
+    
+    // write the namemsg header with the number of announced entries and the protocol version
 	msg->nr_names = htons(i);
 	msg->version = htons(NAME_PROTOCOL_VERSION);
+
 	return pos - (char*)msg; //length
 }
 
 
 /**
- * decapsulate a name message and update name_entries if necessary
+ * convert each of my to be announced name_entries into network
+ * compatible format
+ *
+ * return the length of the name packet
+ */
+char*  
+create_packet(struct name* to, struct name_entry *from)
+{
+    char *pos = (char*) to;
+    int k;
+    olsr_printf(3, "NAME PLUGIN: Announcing name %s (%s) %d\n", 
+        from->name, olsr_ip_to_string(&from->ip), from->len);
+    to->type = htons(from->type);
+    to->len = htons(from->len);
+    memcpy(&to->ip, &from->ip, ipsize);
+    pos += sizeof(struct name);
+    strncpy(pos, from->name, from->len);
+    pos += from->len;
+    for (k = from->len; (k & 3) != 0; k++)
+        *pos++ = '\0';
+    return pos;
+}
+
+/**
+ * decapsulate a received name, service or forwarder and update the corresponding hash table if necessary
+ */
+void
+decap_namemsg(struct name *from_packet, struct name_entry **to, olsr_bool *this_table_changed )
+{
+	struct name_entry *tmp;
+	struct name_entry *already_saved_name_entries;
+    char *name = (char*)from_packet + sizeof(struct name);
+	olsr_printf(4, "\nNAME PLUGIN: decapsulating received name, service or forwarder \n");
+    int type_of_from_packet = ntohs(from_packet->type);
+    unsigned int len_of_name = ntohs(from_packet->len);
+    
+    // don't insert the received entry again, if it has already been inserted in the hash table. 
+    // Instead only the validity time is set in insert_new_name_in_list function, which calls this one
+    for (already_saved_name_entries = (*to); already_saved_name_entries != NULL ; already_saved_name_entries = already_saved_name_entries->next)
+    {
+        if ( (type_of_from_packet==NAME_HOST || type_of_from_packet==NAME_SERVICE) && strncmp(already_saved_name_entries->name, name, len_of_name) == 0 ) {
+            olsr_printf(4, "\nNAME PLUGIN: received name or service entry %s (%s) already in hash table\n", name, olsr_ip_to_string(&already_saved_name_entries->ip));
+            return;
+        } else  if (type_of_from_packet==NAME_FORWARDER && COMP_IP(&already_saved_name_entries->ip, &from_packet->ip) ) {
+            olsr_printf(4, "\nNAME PLUGIN: received forwarder entry %s (%s) already in hash table\n", name, olsr_ip_to_string(&already_saved_name_entries->ip));
+            return;
+        }
+    }
+
+    //XXX: should I check the from_packet->ip here? If so, why not also check the ip fro HOST and SERVICE?
+    if( (type_of_from_packet==NAME_HOST && !is_name_wellformed(name))  ||  (type_of_from_packet==NAME_SERVICE && !is_service_wellformed(name)) ) {
+        olsr_printf(4, "\nNAME PLUGIN: invalid name [%s] received, skipping.\n", name );
+        return;
+    }
+
+    //ignore all packets with a too long name
+    //or a spoofed len of its included name string
+    if (len_of_name > MAX_NAME || strlen(name) != len_of_name) {
+        olsr_printf(4, "\nNAME PLUGIN: from_packet->len %d > MAX_NAME %d or from_packet->len %d !0 strlen(name [%s] in packet)\n", 
+                len_of_name, MAX_NAME, len_of_name, name );
+        return;
+    }
+
+    //if not yet known entry 
+    tmp = olsr_malloc(sizeof(struct name_entry), "new name_entry");		
+    tmp->type = ntohs(from_packet->type);
+    tmp->len = len_of_name > MAX_NAME ? MAX_NAME : ntohs(from_packet->len);
+    tmp->name = olsr_malloc(tmp->len+1, "new name_entry name");
+    memcpy(&tmp->ip, &from_packet->ip, ipsize);
+    strncpy(tmp->name, name, tmp->len);
+    tmp->name[tmp->len] = '\0';
+
+    olsr_printf(3, "\nNAME PLUGIN: create new name/service/forwarder entry %s (%s) [len=%d] [type=%d] in linked list\n", 
+        tmp->name, olsr_ip_to_string(&tmp->ip), tmp->len, tmp->type);
+
+    *this_table_changed = OLSR_TRUE;
+
+    // queue to front
+    tmp->next = *to;
+    *to = tmp;
+}
+
+
+/**
+ * unpack the received message and delegate to the decapsilation function for each
+ * name/service/forwarder entry in the message
  */
 void
-decap_namemsg( struct namemsg *msg, int size, struct name_entry **to )
+update_name_entry(union olsr_ip_addr *originator, struct namemsg *msg, int msg_size, double vtime)
 {
 	char *pos, *end_pos;
-	struct name_entry *tmp;
 	struct name *from_packet; 
 	int i;
+
+	olsr_printf(3, "NAME PLUGIN: Received Message from %s\n", 
+		olsr_ip_to_string(originator));
 	
-	olsr_printf(4, "NAME PLUGIN: decapsulating name msg (size %d)\n", size);
-	
-	if (ntohs(msg->version) != NAME_PROTOCOL_VERSION) {
+    if (ntohs(msg->version) != NAME_PROTOCOL_VERSION) {
 		olsr_printf(3, "NAME PLUGIN: ignoring wrong version %d\n", msg->version);
 		return;
 	}
-	
-	// for now ist easier to just delete everything, than
-	// to update selectively
-	free_name_entry_list(to);
-	name_table_changed = OLSR_TRUE;
-	
+
+
 	/* now add the names from the message */
 	pos = (char*)msg + sizeof(struct namemsg);
-	end_pos = pos + size - sizeof(struct name*); // at least one struct name has to be left
-	
+	end_pos = pos + msg_size - sizeof(struct name*); // at least one struct name has to be left
+
 	for (i=ntohs(msg->nr_names); i > 0 && pos<end_pos; i--) 
 	{
 		from_packet = (struct name*)pos;
-		
-		tmp = olsr_malloc(sizeof(struct name_entry), "new name_entry");		
-		tmp->type = ntohs(from_packet->type);
-		tmp->len = ntohs(from_packet->len) > MAX_NAME ? MAX_NAME : ntohs(from_packet->len);
-		tmp->name = olsr_malloc(tmp->len+1, "new name_entry name");
-		memcpy(&tmp->ip, &from_packet->ip, ipsize);
+        
+        switch (ntohs(from_packet->type)) {
+            case NAME_HOST: 
+                insert_new_name_in_list(originator, list, from_packet, &name_table_changed, vtime); 
+                break;
+            case NAME_FORWARDER:
+                insert_new_name_in_list(originator, forwarder_list, from_packet, &forwarder_table_changed, vtime); 
+                break;
+            case NAME_SERVICE:
+                insert_new_name_in_list(originator, service_list, from_packet, &service_table_changed, vtime); 
+                break;
+            default:
+                olsr_printf(3, "NAME PLUGIN: Received Message of unknown type [%d] from (%s)\n", from_packet->type, olsr_ip_to_string(originator));
+                break;
+        }
 		pos += sizeof(struct name);
-		strncpy(tmp->name, pos, tmp->len);
-		tmp->name[tmp->len] = '\0';
-
-		olsr_printf(3, "NAME PLUGIN: New name %s (%s) %d %d\n", 
-			tmp->name, olsr_ip_to_string(&tmp->ip), tmp->len, tmp->type);
-
-		// queue to front
-		tmp->next = *to;
-		*to = tmp;
-
-		// name + padding
-		pos += 1 + ((tmp->len - 1) | 3);
-	}
+		pos += 1 + (( ntohs(from_packet->len) - 1) | 3);
+    }
 	if (i!=0)
-		olsr_printf(4, "NAME PLUGIN: Lost %d names due to length inconsistency\n", i);
+		olsr_printf(4, "NAME PLUGIN: Lost %d entries in received packet due to length inconsistency (%s)\n", i, olsr_ip_to_string(originator));
 }
 
 
 /**
- * Update or register a new name entry
+ * insert all the new names,services and forwarders from a received packet into the
+ * corresponding entry for this ip in the corresponding hash table
  */
 void
-update_name_entry(union olsr_ip_addr *originator, struct namemsg *msg, int msg_size, double vtime)
+insert_new_name_in_list(union olsr_ip_addr *originator, struct db_entry **this_list, struct name *from_packet, olsr_bool *this_table_changed, double vtime)
 {
 	int hash;
 	struct db_entry *entry;
-
-	olsr_printf(3, "NAME PLUGIN: Received Name Message from %s\n", 
-		olsr_ip_to_string(originator));
+    olsr_bool entry_found = OLSR_FALSE;
+    entry_found = OLSR_FALSE;
 
 	hash = olsr_hashing(originator);
 
-	/* find the entry for originator */
-	for (entry = list[hash]; entry != NULL; entry = entry->next)
-	{
-		if (memcmp(originator, &entry->originator, ipsize) == 0) {
-			// found
-			olsr_printf(4, "NAME PLUGIN: %s found\n", 
-				olsr_ip_to_string(originator));
-		
-			decap_namemsg(msg, msg_size, &entry->names);
- 			
-			olsr_get_timestamp(vtime * 1000, &entry->timer);
-			
-			return;
-		}
-	}
-
-	olsr_printf(3, "NAME PLUGIN: New entry %s\n", 
-		olsr_ip_to_string(originator));
-		
-	/* insert a new entry */
-	entry = olsr_malloc(sizeof(struct db_entry), "new db_entry");
-	
-	memcpy(&entry->originator, originator, ipsize);
-	olsr_get_timestamp(vtime * 1000, &entry->timer);
-	entry->names = NULL;
-	// queue to front
-	entry->next = list[hash];
-	list[hash] = entry;
-	
-	decap_namemsg(msg, msg_size, &entry->names);
-
-	name_table_changed = OLSR_TRUE;
+            /* find the entry for originator, if there is already one */
+            for (entry = this_list[hash]; entry != NULL; entry = entry->next)
+            {
+                if (memcmp(originator, &entry->originator, ipsize) == 0) {
+                    // found
+                    olsr_printf(4, "NAME PLUGIN: found entry for (%s) in its hash table\n", olsr_ip_to_string(originator));
+                
+                    //delegate to function for parsing the packet and linking it to entry->names
+                    decap_namemsg(from_packet, &entry->names, this_table_changed);
+                    
+                    olsr_get_timestamp(vtime * 1000, &entry->timer);
+                   
+                    entry_found = OLSR_TRUE;
+                }
+            }
+            if (! entry_found)
+            {
+                olsr_printf(3, "NAME PLUGIN: create new db entry for ip (%s) in hash table\n", olsr_ip_to_string(originator));
+                    
+                /* insert a new entry */
+                entry = olsr_malloc(sizeof(struct db_entry), "new db_entry");
+                
+                memcpy(&entry->originator, originator, ipsize);
+                olsr_get_timestamp(vtime * 1000, &entry->timer);
+                entry->names = NULL;
+
+                // queue to front
+                entry->next = this_list[hash];
+                this_list[hash] = entry;
+                
+                //delegate to function for parsing the packet and linking it to entry->names
+                decap_namemsg(from_packet, &entry->names, this_table_changed);
+            }
 }
 
-
 /**
  * write names to a file in /etc/hosts compatible format
  */
@@ -650,8 +865,7 @@
 	
 	// write own names
 	for (name = my_names; name != NULL; name = name->next) {
-		fprintf(hosts, "%s\t%s%s\t# myself\n", olsr_ip_to_string(&name->ip),
-			name->name, my_suffix );
+        fprintf(hosts, "%s\t%s%s\t# myself\n", olsr_ip_to_string(&name->ip), name->name, my_suffix );
 	}
 	
 	// write received names
@@ -661,13 +875,11 @@
 		{
 			for (name = entry->names; name != NULL; name = name->next) 
 			{
-				if (name->type == NAME_HOST) {
-					olsr_printf(6, "%s\t%s%s", olsr_ip_to_string(&name->ip), name->name, my_suffix);
-					olsr_printf(6, "\t#%s\n", olsr_ip_to_string(&entry->originator));
-					
-					fprintf(hosts, "%s\t%s%s", olsr_ip_to_string(&name->ip), name->name, my_suffix);
-					fprintf(hosts, "\t# %s\n", olsr_ip_to_string(&entry->originator));
-				}
+                olsr_printf(6, "%s\t%s%s", olsr_ip_to_string(&name->ip), name->name, my_suffix);
+                olsr_printf(6, "\t#%s\n", olsr_ip_to_string(&entry->originator));
+                
+                fprintf(hosts, "%s\t%s%s", olsr_ip_to_string(&name->ip), name->name, my_suffix);
+                fprintf(hosts, "\t# %s\n", olsr_ip_to_string(&entry->originator));
 			}
 		}
 	}
@@ -682,7 +894,70 @@
 
 
 /**
- * write upstream DNS servers to resolv.conf file
+ * write services to a file in the format:
+ * service  #originator ip
+ *
+ * since service has a special format
+ * each line will look similar to e.g.
+ * http://me.olsr:80|tcp|my little homepage
+ */
+void
+write_services_file()
+{
+	int hash;
+	struct name_entry *name;
+	struct db_entry *entry;
+	FILE* services_file;
+	time_t currtime;
+  
+  
+	if (!service_table_changed)
+		return;
+
+	olsr_printf(2, "NAME PLUGIN: writing services file\n");
+		      
+	services_file = fopen( my_services_file, "w" );
+	if (services_file == NULL) {
+		olsr_printf(2, "NAME PLUGIN: cant write services_file file\n");
+		return;
+	}
+	
+	fprintf(services_file, "### this file is overwritten regularly by olsrd\n");
+	fprintf(services_file, "### do not edit\n\n");
+
+	
+	// write own services
+	for (name = my_services; name != NULL; name = name->next) {
+        fprintf(services_file, "%s\t# my own service\n", name->name);
+	}
+	
+	// write received services
+	for (hash = 0; hash < HASHSIZE; hash++) 
+	{
+		for(entry = service_list[hash]; entry != NULL; entry = entry->next)
+		{
+			for (name = entry->names; name != NULL; name = name->next) 
+			{
+                olsr_printf(6, "%s\t",  name->name);
+                olsr_printf(6, "\t#%s\n", olsr_ip_to_string(&entry->originator));
+                
+                fprintf(services_file, "%s\t", name->name );
+                fprintf(services_file, "\t#%s\n", olsr_ip_to_string(&entry->originator));
+			}
+		}
+	}
+
+	if (time(&currtime)) {
+		fprintf(services_file, "\n### written by olsrd at %s", ctime(&currtime));
+	}
+	  
+	fclose(services_file);
+	service_table_changed = OLSR_FALSE;
+}
+
+/**
+ * write the 3 best upstream DNS servers to resolv.conf file
+ * best means the 3 with the best etx value in routing table
  */
 void
 write_resolv_file()
@@ -694,23 +969,17 @@
 	struct rt_entry *route, *tmp, *last;
 	FILE* resolv;
 	int i=0;
+	time_t currtime;
 	
-	if (my_resolv_file[0] == '\0')
-		return;
-	
-	if (!name_table_changed)
+	if (!forwarder_table_changed || my_forwarders != NULL || my_resolv_file[0] == '\0')
 		return;
 
-	olsr_printf(2, "NAME PLUGIN: writing resolv file\n");
-
 	for (hash = 0; hash < HASHSIZE; hash++) 
 	{
-		for(entry = list[hash]; entry != NULL; entry = entry->next)
+		for(entry = forwarder_list[hash]; entry != NULL; entry = entry->next)
 		{
 			for (name = entry->names; name != NULL; name = name->next) 
 			{
-				if (name->type != NAME_FORWARDER)
-					continue;
 				
 				/* find the nearest one */
 				route = olsr_lookup_routing_table(&name->ip);
@@ -762,18 +1031,25 @@
 		return;
 		 
 	/* write to file */
+    olsr_printf(2, "NAME PLUGIN: try to write to resolv file\n");
 	resolv = fopen( my_resolv_file, "w" );
 	if (resolv == NULL) {
 		olsr_printf(2, "NAME PLUGIN: can't write resolv file\n");
 		return;
 	}
+	fprintf(resolv, "### this file is overwritten regularly by olsrd\n");
+	fprintf(resolv, "### do not edit\n\n");
 	i=0;
 	for (tmp=best_routes; tmp!=NULL && i<3; tmp=tmp->next) {
 		olsr_printf(6, "NAME PLUGIN: nameserver %s\n", olsr_ip_to_string(&tmp->rt_dst));
 		fprintf(resolv, "nameserver %s\n", olsr_ip_to_string(&tmp->rt_dst));
 		i++;
 	}
+	if (time(&currtime)) {
+		fprintf(resolv, "\n### written by olsrd at %s", ctime(&currtime));
+	}
 	fclose(resolv);
+	forwarder_table_changed = OLSR_FALSE;
 }
 
 
@@ -789,6 +1065,7 @@
 		to_delete = *tmp;
 		*tmp = (*tmp)->next;
 		free( to_delete->name );
+		to_delete->name = NULL;
 		free( to_delete );
 		to_delete = NULL;
 	}
@@ -831,3 +1108,84 @@
 	}
 	return OLSR_FALSE;
 }
+
+/** check if name has the right syntax, i.e. it must adhere to a special regex 
+ * stored in regex_t_name
+ * necessary to avaid names like "0.0.0.0 google.de\n etc"
+ */
+olsr_bool
+is_name_wellformed(char *name) {
+    return regexec(&regex_t_name, name, 1, &regmatch_t_name, 0) == 0 ;
+}
+
+
+/**
+ * check if the service is in the right syntax and also that the hostname 
+ * or ip whithin the service is allowed
+ */
+olsr_bool
+allowed_service(char *service_line)
+{
+    /* the call of is_service_wellformed generates the submatches stored in regmatch_t_service
+     * these are then used by allowed_hostname_or_ip_in_service
+     * see regexec(3) for more infos */
+    if (!is_service_wellformed(service_line)) {
+        return OLSR_FALSE;
+    } else if (!allowed_hostname_or_ip_in_service(service_line, &(regmatch_t_service[1]))) {
+        return OLSR_FALSE;
+    } 
+
+   return OLSR_TRUE;
+}
+
+olsr_bool
+allowed_hostname_or_ip_in_service(char *service_line, regmatch_t *hostname_or_ip_match) 
+{
+    char *hostname_or_ip;
+    struct in_addr ip;
+    union olsr_ip_addr olsr_ip;
+    struct name_entry *name;
+    if (hostname_or_ip_match->rm_so < 0 || hostname_or_ip_match->rm_eo < 0) {
+          return OLSR_FALSE;
+    } 
+
+    hostname_or_ip = strndup(&service_line[hostname_or_ip_match->rm_so], hostname_or_ip_match->rm_eo - hostname_or_ip_match->rm_so);
+    //hostname is one of the names, that I announce (i.e. one that i am allowed to announce)
+    for (name = my_names; name != NULL; name = name->next) {
+        if (strncmp(name->name, hostname_or_ip, name->len - strlen(my_suffix)) == 0 ) {
+            olsr_printf(4, "NAME PLUGIN: hostname %s in service %s is OK\n", hostname_or_ip, service_line);
+            free(hostname_or_ip);
+            hostname_or_ip = NULL;
+            return OLSR_TRUE;
+        }
+    }
+    
+    //ip in service-line is allowed 
+    if (inet_aton(hostname_or_ip, &ip)) {
+        olsr_ip.v4 = ip.s_addr;
+        if (allowed_ip(&olsr_ip)) {
+            olsr_printf(2, "NAME PLUGIN: ip %s in service %s is OK\n", olsr_ip_to_string(&olsr_ip), service_line);
+            free(hostname_or_ip);
+            hostname_or_ip = NULL;
+            return OLSR_TRUE;
+        }
+    }
+
+    olsr_printf(1, "NAME PLUGIN: ip or hostname %s in service %s is NOT allowed (does not belong to you)\n", hostname_or_ip, service_line);
+    free(hostname_or_ip);
+    hostname_or_ip = NULL;
+
+    return OLSR_FALSE;
+}
+
+/**
+ * check if the service matches the syntax 
+ * of "protocol://host:port/path|tcp_or_udp|a short description", 
+ * which is given in the regex regex_t_service
+ */
+olsr_bool
+is_service_wellformed(char *service_line)
+{
+    return regexec(&regex_t_service, service_line, pmatch_service, regmatch_t_service, 0) == 0;
+}
+
diff -Nur olsrd-0.4.10.orig/lib/nameservice/src/nameservice.h olsrd-0.4.10/lib/nameservice/src/nameservice.h
--- olsrd-0.4.10.orig/lib/nameservice/src/nameservice.h	2005-06-02 17:34:00.000000000 +0200
+++ olsrd-0.4.10/lib/nameservice/src/nameservice.h	2006-12-01 08:26:58.000000000 +0100
@@ -39,6 +39,7 @@
 #define _NAMESERVICE_PLUGIN
 
 #include <sys/time.h>
+#include <regex.h>
 
 #include "olsr_types.h"
 #include "interfaces.h"
@@ -51,19 +52,27 @@
 #define PLUGIN_VERSION	"0.2"
 #define PLUGIN_AUTHOR	"Bruno Randolf"
 
+// useful to set for the freifunkfirmware to remove all
+// calls to olsr_printf by the empty statement ";"
+//#define olsr_printf(...) ;
 
 #define MESSAGE_TYPE		130
 #define PARSER_TYPE		MESSAGE_TYPE
 #define EMISSION_INTERVAL	120 /* two minutes */
-#define NAME_VALID_TIME		3600 /* one hour */
+#define NAME_VALID_TIME		1800 /* half one hour */
 
 #define NAME_PROTOCOL_VERSION	1
 
-#define MAX_NAME 255
+#define MAX_NAME 127
 #define MAX_FILE 255
-#define MAX_SUFFIX 255
-
+#define MAX_SUFFIX 63
 
+/**
+ * a linked list of name_entry
+ * if type is NAME_HOST, name is a hostname and ip its IP addr
+ * if type is NAME_FORWARDER, then ip is a dns-server (and name is irrelevant)
+ * if type is NAME_SERVICE, then name is a service-line (and the ip is irrelevant)
+ */
 struct name_entry
 {
 	union olsr_ip_addr	ip;
@@ -73,7 +82,17 @@
 	struct name_entry	*next;		/* linked list */
 };
 
-/* database entry */
+/* *
+ * linked list of db_entries for each originator with
+ * originator being its main_addr
+ * 
+ * names points to the name_entry with its hostname, dns-server or
+ * service-line entry
+ *
+ * all the db_entries are hashed in nameservice.c to avoid a too long list
+ * for many nodes in a net
+ *
+ * */
 struct db_entry
 {
 	union olsr_ip_addr	originator;	/* IP address of the node this entry describes */
@@ -98,8 +117,26 @@
 int
 encap_namemsg(struct namemsg *);
 
+struct name_entry*
+add_name_to_list(struct name_entry *my_list, char *value, int type, struct in_addr *ip);
+
+struct name_entry*
+remove_nonvalid_names_from_list(struct name_entry *my_list, int type);
+
+void 
+free_all_list_entries(struct db_entry **this_db_list) ;
+
 void
-decap_namemsg(struct namemsg *, int, struct name_entry**);
+timeout_old_names(struct db_entry **this_list, olsr_bool *this_table_changed);
+
+void
+decap_namemsg(struct name *from_packet, struct name_entry **to, olsr_bool *this_table_changed );
+
+void
+insert_new_name_in_list(union olsr_ip_addr *originator, struct db_entry **this_list, struct name *from_packet, olsr_bool *this_table_changed, double vtime);
+
+olsr_bool
+allowed_hostname_or_ip_in_service(char *service_line, regmatch_t *hostname_or_ip);
 
 void
 update_name_entry(union olsr_ip_addr *, struct namemsg *, int, double);
@@ -108,6 +145,9 @@
 write_hosts_file(void);
 
 void
+write_services_file(void);
+
+void
 write_resolv_file(void);
 
 int
@@ -119,6 +159,18 @@
 olsr_bool
 allowed_ip(union olsr_ip_addr *addr);
 
+olsr_bool
+allowed_service(char *service_line);
+
+olsr_bool
+is_name_wellformed(char *service_line);
+
+olsr_bool
+is_service_wellformed(char *service_line);
+
+char*  
+create_packet(struct name *to, struct name_entry *from);
+
 void
 name_constructor(void);
 
diff -Nur olsrd-0.4.10.orig/lib/nameservice/src/nameservice_msg.h olsrd-0.4.10/lib/nameservice/src/nameservice_msg.h
--- olsrd-0.4.10.orig/lib/nameservice/src/nameservice_msg.h	2005-03-17 22:41:30.000000000 +0100
+++ olsrd-0.4.10/lib/nameservice/src/nameservice_msg.h	2006-12-01 08:26:58.000000000 +0100
@@ -38,29 +38,34 @@
 #ifndef _NAMESEVICE_MSG
 #define _NAMESEVICE_MSG
 
-
+/* type of the packet of name_entry */
 typedef enum {
 	NAME_HOST = 0,
 	NAME_FORWARDER = 1,
-	NAME_SERVICE = 2
+	NAME_SERVICE = 2,
 } NAME_TYPE;
 
-
+/**
+ * the name, forwarder or service entry as found in a packet within a
+ * message
+ **/
 struct name
 {
 	olsr_u16_t		type;
 	olsr_u16_t		len;	// length of the name
+    // the ip of the hostname, or the ip of the dns-server
+    // ip is irrelevant for services
 	union olsr_ip_addr	ip;
 	/*
-	 * name is written in plain text after this struct and padded to 4 byte
+	 * name or service is written in plain text after this struct and padded to 4 byte
 	 */
 };
 
 
 struct namemsg
 {
-	olsr_u16_t version;
-	olsr_u16_t nr_names;   // number of following name messages
+	olsr_u16_t version;    // version number of the nameservice plugin
+	olsr_u16_t nr_names;   // number of following packets including names, forwarders or services
 	/*
 	 * at least one struct name following
 	 */