diff --git a/src/ac/socklist.c b/src/ac/socklist.c
index 6b78f205..75583841 100644
--- a/src/ac/socklist.c
+++ b/src/ac/socklist.c
@@ -282,7 +282,7 @@ int socklist_add_unicast(const char *addr, const char * port, int ac_proto)
 		socklist[socklist_len].ac_proto=ac_proto;
 	
 		socklist_len++;
-		cw_log(LOG_INFO,"Bound to: %s (%i)\n",addr,sockfd);
+		cw_log(LOG_INFO,"Bound to: %s (%i)",addr,sockfd);
 	}
 
 	freeaddrinfo(res0);	
@@ -349,7 +349,7 @@ int socklist_add_broadcast(const char *addr, const char * port,int ac_proto)
 //		printf ("sock proto %d\n",socklist[socklist_len].ac_proto);
 		socklist_len++;
 
-		cw_log(LOG_INFO,"Bound to broadcast: %s:%s (%i,R:%i,I:%d)\n",addr,port,sockfd,rfd,socklist_len-1);
+		cw_log(LOG_INFO,"Bound to broadcast: %s:%s (%i,R:%i,I:%d)",addr,port,sockfd,rfd,socklist_len-1);
 	}
 
 	freeaddrinfo(res0);	
diff --git a/src/capwap/Makefile b/src/capwap/Makefile
index c4068a0c..4225f34f 100644
--- a/src/capwap/Makefile
+++ b/src/capwap/Makefile
@@ -95,14 +95,6 @@ LWAPPCISCOOBJS = \
 
 
 CAPWAPOBJS= \
-	   cwmsg_init_echo_request.o \
-	   cwmsg_addelem.o \
-	   cwmsg_vaddelem.o \
-	   cwmsg_addelem_ac_descriptor.o \
-	   cwmsg_addelem_wtp_descriptor.o \
-	   cwmsg_addelem_cw_local_ip_addr.o \
-	   cwmsg_addelem_mtu_discovery_padding.o \
-	   cwmsg_addelem_ac_timestamp.o \
 	cwmsg_addelem_maximum_message_length.o \
 	cwmsg_addelem_image_identifier.o \
 	   cwmsg_send.o \
@@ -148,7 +140,15 @@ CAPWAPOBJS= \
 #		cwsend_unknow_response.o \
 	cw_send_configuration_update_response.o \
 	cwsend_echo_request.o \
-	cw_send_echo_response.o \
+		   cwmsg_init_echo_request.o \
+	   cwmsg_addelem.o \
+	   cwmsg_vaddelem.o \
+	   cwmsg_addelem_ac_descriptor.o \
+	   cwmsg_addelem_wtp_descriptor.o \
+	   cwmsg_addelem_cw_local_ip_addr.o \
+	   cwmsg_addelem_mtu_discovery_padding.o \
+	   cwmsg_addelem_ac_timestamp.o \
+cw_send_echo_response.o \
 	cw_handle_echo_request.o \
 	   cwsend_conf_status_response.o\
 	cw_readmsg_configuration_status_response.o \
diff --git a/src/capwap/action.h b/src/capwap/action.h
index f6060641..e69ed35b 100644
--- a/src/capwap/action.h
+++ b/src/capwap/action.h
@@ -73,7 +73,7 @@ struct cw_action_out{
 	uint32_t item_id;
 	uint32_t vendor_id;
 	uint16_t elem_id;
-	
+	int (*init)(struct conn * conn, struct cw_action_out *a, uint8_t * dst); 
 	int (*out)(struct conn * conn, struct cw_action_out *a, uint8_t * dst); 
 	struct cw_item *(*get)(struct conn *conn,struct cw_action_out *a);
 	uint8_t mand;
diff --git a/src/capwap/capwap.h b/src/capwap/capwap.h
index 0ab861b8..dd7d7f46 100644
--- a/src/capwap/capwap.h
+++ b/src/capwap/capwap.h
@@ -962,6 +962,8 @@ int cw_in_check_img_data_req(struct conn *conn, struct cw_action_in *a, uint8_t
 int cw_out_wtp_board_data(struct conn *conn,struct cw_action_out * a,uint8_t *dst) ;
 
 void cw_init_request(struct conn *conn,int msg_id);
+struct cw_item * cw_out_get_session_id(struct conn *conn,struct cw_action_out * a);
+
 
 
 
diff --git a/src/capwap/capwap_action_helpers.c b/src/capwap/capwap_action_helpers.c
index 5eef1d5f..627982d0 100644
--- a/src/capwap/capwap_action_helpers.c
+++ b/src/capwap/capwap_action_helpers.c
@@ -27,3 +27,25 @@ struct cw_item *cw_out_get_local(struct conn *conn, struct cw_action_out *a)
 	return cw_itemstore_get(conn->local,a->item_id);
 }
 
+
+
+#include "capwap.h"
+#include "capwap_items.h"
+
+#include "log.h"
+#include "rand.h"
+
+struct cw_item * cw_out_get_session_id(struct conn *conn,struct cw_action_out * a)
+{
+	printf("Vendor ID: %d\n", a->vendor_id);
+	uint8_t session_id[16];
+	int l = cw_rand(session_id,16);
+	if ( l!=16 ) {
+		cw_log(LOG_ERR,"Can't init session ID.");
+		return NULL;
+	}
+	
+
+	return cw_itemstore_set_bstrn(conn->local,CW_ITEM_SESSION_ID,session_id,4);
+}
+
diff --git a/src/capwap/capwap_actions_ac.c b/src/capwap/capwap_actions_ac.c
index 11941ddd..3d3e5d83 100644
--- a/src/capwap/capwap_actions_ac.c
+++ b/src/capwap/capwap_actions_ac.c
@@ -148,17 +148,17 @@ cw_action_out_t capwap_actions_ac_out[] = {
 
 	/* AC Descriptor */
 	{CW_MSG_DISCOVERY_RESPONSE, CW_ITEM_AC_DESCRIPTOR, 0, CW_ELEM_AC_DESCRIPTOR,
-	 cw_out_ac_descriptor, 0}
+	 NULL,cw_out_ac_descriptor, 0}
 	,
 
 	/* AC Name */
 	{CW_MSG_DISCOVERY_RESPONSE, CW_ITEM_AC_NAME, 0,
-	 CW_ELEM_AC_NAME, cw_out_generic, cw_out_get_outgoing}
+	CW_ELEM_AC_NAME, NULL, cw_out_generic, cw_out_get_outgoing}
 	,
 
 	/* List of CAPWAP Control IPv4 and IPv6 addresses */
 	{CW_MSG_DISCOVERY_RESPONSE, CW_ITEM_CAPWAP_CONTROL_IP_ADDRESS_LIST, 0,
-	 0, cw_out_capwap_control_ip_addr_list, cw_out_get_outgoing}
+	 0, NULL, cw_out_capwap_control_ip_addr_list, cw_out_get_outgoing}
 	,
 
 
@@ -170,17 +170,17 @@ cw_action_out_t capwap_actions_ac_out[] = {
 
 	/* Result Code */
 	{CW_MSG_JOIN_RESPONSE, CW_ITEM_RESULT_CODE, 0,
-	 CW_ELEM_RESULT_CODE, cw_out_generic, cw_out_get_outgoing, 1}
+	 CW_ELEM_RESULT_CODE, NULL,cw_out_generic, cw_out_get_outgoing, 1}
 	,
 
 	/* AC Descriptor */
 	{CW_MSG_JOIN_RESPONSE, CW_ITEM_AC_DESCRIPTOR, 0, CW_ELEM_AC_DESCRIPTOR,
-	 cw_out_ac_descriptor, 0, 1}
+	 NULL,cw_out_ac_descriptor, 0, 1}
 	,
 
 	/* AC Name */
 	{CW_MSG_JOIN_RESPONSE, CW_ITEM_AC_NAME, 0,
-	 CW_ELEM_AC_NAME, cw_out_generic, cw_out_get_outgoing}
+	 CW_ELEM_AC_NAME, NULL, cw_out_generic, cw_out_get_outgoing}
 	,
 
 
@@ -194,7 +194,7 @@ cw_action_out_t capwap_actions_ac_out[] = {
 
 	/* Result Code */
 	{CW_MSG_IMAGE_DATA_RESPONSE, CW_ITEM_RESULT_CODE, 0,
-	 CW_ELEM_RESULT_CODE, cw_out_generic, cw_out_get_outgoing, 1}
+	 CW_ELEM_RESULT_CODE, NULL,cw_out_generic, cw_out_get_outgoing, 1}
 	,
 
 
diff --git a/src/capwap/capwap_actions_wtp.c b/src/capwap/capwap_actions_wtp.c
index 2c42c8d6..1e88a3e4 100644
--- a/src/capwap/capwap_actions_wtp.c
+++ b/src/capwap/capwap_actions_wtp.c
@@ -89,13 +89,13 @@ cw_action_out_t capwap_actions_wtp_out[] = {
 
 	/* AC Name */
 	{CW_MSG_DISCOVERY_REQUEST, CW_ITEM_DISCOVERY_TYPE, 0,
-	 CW_ELEM_DISCOVERY_TYPE, cw_out_generic, cw_out_get_outgoing}
+	 CW_ELEM_DISCOVERY_TYPE, NULL,cw_out_generic, cw_out_get_outgoing}
 	,
 
 
 	/* WTP Board Data */
 	{CW_MSG_DISCOVERY_REQUEST, CW_ITEM_WTP_BOARD_DATA, 0,
-	 CW_ELEM_WTP_BOARD_DATA, cw_out_wtp_board_data, cw_out_get_outgoing}
+	 CW_ELEM_WTP_BOARD_DATA, NULL,cw_out_wtp_board_data, cw_out_get_outgoing}
 	,
 
 
@@ -108,15 +108,26 @@ cw_action_out_t capwap_actions_wtp_out[] = {
 
 	/* Location Data */
 	{CW_MSG_JOIN_REQUEST, CW_ITEM_LOCATION_DATA, 0,
-	 CW_ELEM_LOCATION_DATA, cw_out_generic, cw_out_get_local,1}
+	 CW_ELEM_LOCATION_DATA, NULL,cw_out_generic, cw_out_get_local,1}
 	,
 
+	/* WTP Board Data */
+	{CW_MSG_JOIN_REQUEST, CW_ITEM_WTP_BOARD_DATA, 0,
+	 CW_ELEM_WTP_BOARD_DATA, NULL,cw_out_wtp_board_data, cw_out_get_outgoing}
+	,
+
+
 	/* WTP Name */
 	{CW_MSG_JOIN_REQUEST, CW_ITEM_WTP_NAME, 0,
-	 CW_ELEM_WTP_NAME, cw_out_generic, cw_out_get_local,1}
+	 CW_ELEM_WTP_NAME, NULL,cw_out_generic, cw_out_get_local,1}
 	,
 
 
+	/* Session ID */
+	{CW_MSG_JOIN_REQUEST, CW_ITEM_SESSION_ID, 0,
+	 CW_ELEM_SESSION_ID, NULL,cw_out_generic, cw_out_get_session_id,1}
+	,
+
 	{0, 0}
 
 };
diff --git a/src/capwap/cipwap_actions_ac.c b/src/capwap/cipwap_actions_ac.c
index 14083d31..5546e654 100644
--- a/src/capwap/cipwap_actions_ac.c
+++ b/src/capwap/cipwap_actions_ac.c
@@ -56,13 +56,13 @@ cw_action_out_t cipwap_actions_ac_out[] = {
 
 	/* AC Descriptor (Cisco) */
 	{CW_MSG_DISCOVERY_RESPONSE, CW_ITEM_AC_DESCRIPTOR, 0 ,
-	CW_ELEM_AC_DESCRIPTOR, cw_out_cisco_ac_descriptor, 0}
+	CW_ELEM_AC_DESCRIPTOR, NULL,cw_out_cisco_ac_descriptor, 0}
 	,
 
 	/* Cisco AP Timesync - Important to get the WTP a DTLS 
 	   connection stablished*/
 	{CW_MSG_DISCOVERY_RESPONSE, CW_ITEM_AC_TIMESTAMP, CW_VENDOR_ID_CISCO,
-	CW_CISCO_AP_TIMESYNC, cw_out_cisco_ap_timesync, 0}
+	CW_CISCO_AP_TIMESYNC, NULL,cw_out_cisco_ap_timesync, 0}
 	,
 
 	/* -------------------------------------------------------------------------------
@@ -71,7 +71,7 @@ cw_action_out_t cipwap_actions_ac_out[] = {
 
 	/* AC Descriptor (Cisco) */
 	{CW_MSG_JOIN_RESPONSE, CW_ITEM_AC_DESCRIPTOR, 0 ,
-	CW_ELEM_AC_DESCRIPTOR, cw_out_cisco_ac_descriptor, 0}
+	CW_ELEM_AC_DESCRIPTOR, NULL,cw_out_cisco_ac_descriptor, 0}
 	,
 
 
diff --git a/src/capwap/cw_out_generic.c b/src/capwap/cw_out_generic.c
index d592f603..f295a8ce 100644
--- a/src/capwap/cw_out_generic.c
+++ b/src/capwap/cw_out_generic.c
@@ -18,6 +18,9 @@ int cw_put_item(uint8_t * dst, struct cw_item *item)
 			return cw_put_word(dst, item->word);
 		case CW_ITEMTYPE_DWORD:
 			return cw_put_dword(dst, item->dword);
+		case CW_ITEMTYPE_BSTR:
+			return cw_put_bstr(dst,item->data);
+			
 	}
 
 	return 0;
diff --git a/src/capwap/cw_put_msg.c b/src/capwap/cw_put_msg.c
index 605325b8..1e49f87b 100644
--- a/src/capwap/cw_put_msg.c
+++ b/src/capwap/cw_put_msg.c
@@ -37,6 +37,7 @@
 int cw_put_msg(struct conn *conn, uint8_t * rawout)
 {
 
+
 	/* rawout is already initialized, so we can get 
 	   msg type from buffer */
 	uint8_t *msgptr = rawout + cw_get_hdr_msg_offset(rawout);
diff --git a/src/capwap/cw_rand.c b/src/capwap/cw_rand.c
index 8d6b7a66..f91974c6 100644
--- a/src/capwap/cw_rand.c
+++ b/src/capwap/cw_rand.c
@@ -30,17 +30,17 @@
 #include "cw_util.h"
 #include "log.h"
 
-char * cw_rand_dev = "/dev/random";
+char *cw_rand_dev = "/dev/random";
 
-int cw_rand_r(uint8_t*dst, int len)
+int cw_rand_r(uint8_t * dst, int len)
 {
 	int rf;
 	int l;
 
- 	rf = open(cw_rand_dev, O_RDONLY | O_NDELAY); 
-	if (rf<0){
+	rf = open(cw_rand_dev, O_RDONLY | O_NDELAY);
+	if (rf < 0) {
 
-		cw_log(LOG_ERR,"Can't open %s: %s",cw_rand_dev,strerror(errno));
+		cw_log(LOG_ERR, "Can't open %s: %s", cw_rand_dev, strerror(errno));
 		return 0;
 	}
 
@@ -48,8 +48,8 @@ int cw_rand_r(uint8_t*dst, int len)
 	l = read(rf, dst, len);
 	close(rf);
 
-	if ((l<0) && (errno != EAGAIN)){
-		cw_log(LOG_ERR,"Cant read from %s: %s",cw_rand_dev,strerror(errno));
+	if ((l < 0) && (errno != EAGAIN)) {
+		cw_log(LOG_ERR, "Cant read from %s: %s", cw_rand_dev, strerror(errno));
 		return 0;
 	}
 
@@ -58,25 +58,24 @@ int cw_rand_r(uint8_t*dst, int len)
 
 
 
-
-int cw_rand(uint8_t *dst, int len)
+int cw_rand(uint8_t * dst, int len)
 {
 	static uint32_t rinit = 0;
-	if (!rinit){
+	if (!rinit) {
 
-		int l = cw_rand_r((uint8_t*)(&rinit),sizeof(uint32_t));
-		if (l<sizeof(uint32_t)){
-			cw_log(LOG_WARNING,"Can't read enough bytes from %s. Using time to init rand instead.",cw_rand_dev);
-			rinit=time(NULL);
+		int l = cw_rand_r((uint8_t *) (&rinit), sizeof(uint32_t));
+		if (l < sizeof(uint32_t)) {
+			cw_log(LOG_WARNING,
+			       "Can't read enough bytes from %s. Using time to init rand instead.",
+			       cw_rand_dev);
+			rinit = time(NULL);
 		}
 
 		srand(rinit);
 	}
 	int i;
-	for (i=0; i<len; i++){
-		dst[i]=rand();
+	for (i = 0; i < len; i++) {
+		dst[i] = rand();
 	}
 	return len;
 }
-
-
diff --git a/src/capwap/cw_util.h b/src/capwap/cw_util.h
index 627d0ea1..9a19d45e 100644
--- a/src/capwap/cw_util.h
+++ b/src/capwap/cw_util.h
@@ -42,7 +42,6 @@ extern int cw_foreach_msgelem(uint8_t * msgelems,  int len,
 		int (*callback)(void*,int,uint8_t*,int),void *arg );
 
 
-extern int cw_rand(uint8_t*dst, int len);
 
 
 
@@ -55,9 +54,9 @@ extern int cw_rand(uint8_t*dst, int len);
 
 
 /* functions used to "rfc-verify" message elements */
-void cw_mand_elem_found(int *l,int type);
+//void cw_mand_elem_found(int *l,int type);
 //int cw_is_missing_mand_elems(int *l);
-void cw_get_missing_mand_elems(char *dst, int *l);
+//void cw_get_missing_mand_elems(char *dst, int *l);
 
 
 
diff --git a/src/capwap/itemstore.c b/src/capwap/itemstore.c
index d22b997b..127a47d6 100644
--- a/src/capwap/itemstore.c
+++ b/src/capwap/itemstore.c
@@ -144,14 +144,14 @@ int cw_itemstore_set_ptr(cw_itemstore_t s, uint32_t id, void *ptr)
 	return 1;
 }
 
-int cw_itemstore_set_bstrn(cw_itemstore_t s, uint32_t id, uint8_t * data, int len)
+cw_item_t * cw_itemstore_set_bstrn(cw_itemstore_t s, uint32_t id, uint8_t * data, int len)
 {
 	struct cw_item *i = cw_item_create(s, id);
 	if (!i)
-		return 0;
+		return NULL;
 	i->type = CW_ITEMTYPE_BSTR;
 	i->data = bstr_create(data, len);
-	return 1;
+	return i;
 }
 
 int cw_itemstore_set_bstr16n(cw_itemstore_t s, uint32_t id, uint8_t * data, int len)
diff --git a/src/capwap/itemstore.h b/src/capwap/itemstore.h
index 72035f59..c2aba3d0 100644
--- a/src/capwap/itemstore.h
+++ b/src/capwap/itemstore.h
@@ -74,7 +74,7 @@ extern cw_itemstore_t cw_itemstore_create();
 extern int cw_itemstore_set_strn(cw_itemstore_t s, uint32_t id, const char *str, int n);
 extern int cw_itemstore_set_str(cw_itemstore_t s, uint32_t id, const char *str);
 extern int cw_itemstore_set_ptr(cw_itemstore_t s, uint32_t id, void *ptr);
-extern int cw_itemstore_set_bstrn(cw_itemstore_t s, uint32_t id, uint8_t * data, int len);
+extern cw_item_t * cw_itemstore_set_bstrn(cw_itemstore_t s, uint32_t id, uint8_t * data, int len);
 extern int cw_itemstore_set_dword(cw_itemstore_t s, uint32_t id, uint32_t dword);
 extern int cw_itemstore_set_word(cw_itemstore_t s, uint32_t id, uint32_t word);
 extern int cw_itemstore_set_byte(cw_itemstore_t s, uint32_t id, uint8_t byte);
diff --git a/src/wtp/discovery.c b/src/wtp/discovery.c
index 6ef18cad..8b361de7 100644
--- a/src/wtp/discovery.c
+++ b/src/wtp/discovery.c
@@ -114,7 +114,6 @@ static int run_discovery(struct conn *conn)
 
 	time_t timer = cw_timer_start(0);
 
-	cw_itemstore_t discs;
 
 	while (!cw_timer_timeout(timer)
 	       && conn->capwap_state == CW_STATE_DISCOVERY) {
@@ -129,9 +128,16 @@ static int run_discovery(struct conn *conn)
 			cw_log(LOG_ERROR,"Error reading messages: %s",strerror(errno));
 			break;
 		}
-		discs = cw_itemstore_get_avltree(conn->remote, CW_ITEM_DISCOVERIES);
 	}
 
+	cw_itemstore_t discs;
+	discs = cw_itemstore_get_avltree(conn->remote, CW_ITEM_DISCOVERIES);
+
+
+	if (!discs) {
+		cw_log(LOG_ERR,"No discovery responses received");
+		return 0;
+	}
 
 	int i;
 
diff --git a/src/wtp/join.c b/src/wtp/join.c
index 36da60c4..8580f908 100644
--- a/src/wtp/join.c
+++ b/src/wtp/join.c
@@ -187,7 +187,7 @@ int join()
 	struct conn * conn = get_conn();
 	cw_aciplist_t iplist = cw_itemstore_get_avltree(conn->local,CW_ITEM_CAPWAP_CONTROL_IP_ADDRESS_LIST);
 	if (!iplist){
-		cw_log(LOG_ERR,"No Ips to join controller.");
+		cw_log(LOG_ERR,"No IPs to join controller.");
 		return 0;
 	}
 
diff --git a/src/wtp/wtp_main.c b/src/wtp/wtp_main.c
index 65a4635e..e1cc5143 100644
--- a/src/wtp/wtp_main.c
+++ b/src/wtp/wtp_main.c
@@ -75,7 +75,6 @@ int main()
 	cw_itemstore_set_str(conn->local,CW_ITEM_WTP_NAME,"WTP Tube");
 
 
-cw_log(LOG_ERR,"Entetrente");
 
 	discovery();
 	join();