diff --git a/src/hash.c b/src/hash.c
index 44e3827..a205bad 100644
--- a/src/hash.c
+++ b/src/hash.c
@@ -17,7 +17,10 @@ void hash_data(pub_data *data, unsigned char *buf) {
 
 // Hash every data contained in data_list then return a network hash
 void hash_network(list *data_list, unsigned char *buf) {
-	unsigned char *concat = (unsigned char*) malloc(0);
+	// Get list length to initialize concat buffer
+	int concat_len = len_list(data_list) * 16;
+	unsigned char *concat = (unsigned char*) malloc(concat_len);
+
 	unsigned char hash[SHA256_DIGEST_LENGTH];
 	int totlen = 0;
 	list *tmp = data_list;
@@ -55,6 +58,5 @@ void concat_data(pub_data *data, unsigned char *buf) {
 
 // Concat hash2 to hash1 (hash1 is modified)
 void concat_hash(unsigned char *hash1, unsigned char *hash2, size_t size) {
-	hash1 = (unsigned char*) realloc(hash1, size + 16);
 	memcpy(hash1+size, hash2, 16);
 }
diff --git a/src/node.c b/src/node.c
index 6aacb35..7c8594f 100644
--- a/src/node.c
+++ b/src/node.c
@@ -192,7 +192,7 @@ pub_data *get_data(int64_t id) {
 
 	while(tmp != NULL) {
 		data = (pub_data*) tmp->data;
-
+        tmp = tmp->next;
 		if(data->id == id)
 			return data;
 	}
@@ -484,10 +484,12 @@ int add_tlv(packet *pack, tlv *tlv, struct sockaddr_in6 *dest, int socket_num) {
 
 // Send length bytes from packet
 int send_packet(char *packet_buff, int16_t length, struct sockaddr_in6 *dest, int socket_num) {
-        ((packet*) packet_buff)->length = htons(((packet*) packet_buff)->length);
+    ((packet*) packet_buff)->length = htons(((packet*) packet_buff)->length);
 
     // Vectorized buffer
-    struct iovec vec_buff = {.iov_len = length + 4, .iov_base = packet_buff};
+    struct iovec vec_buff[1];
+    vec_buff[0].iov_len = length + 4;
+    vec_buff[0].iov_base = packet_buff;
 
     int error_while_sending = 0;
 
@@ -495,7 +497,7 @@ int send_packet(char *packet_buff, int16_t length, struct sockaddr_in6 *dest, in
     struct msghdr packet_tlv_send_out = {
         .msg_name = dest,
         .msg_namelen = sizeof(struct sockaddr_in6),
-        .msg_iov = &vec_buff,
+        .msg_iov = vec_buff,
         .msg_iovlen = 1 // We have only one iovec buffer. But if we had 2, we would write 2.
     };
 
@@ -970,7 +972,7 @@ int work_with_tlvs(char * data, int16_t total_packet_len, struct sockaddr_in6 *s
             	cur_tlv.warning = (warning*) (data + pos);
 
             	// Print exactly new_tlv.length characters from new_tlv.message
-            	sprintf(warn, "\x1b[31m>> WARNING:\n%%.%ds \x1b[0m", cur_tlv.warning->length + 1);
+            	sprintf(warn, ">> WARNING:\n%%.%ds", cur_tlv.warning->length + 1);
             	printf(warn, cur_tlv.warning->message);
 
             	// The position is updated
diff --git a/src/tlv.c b/src/tlv.c
index 82de813..140a9fb 100644
--- a/src/tlv.c
+++ b/src/tlv.c
@@ -92,7 +92,7 @@ int build_neighbour(tlv *tlv, struct in6_addr ip, int16_t port) {
 	new->type = 3;
 	new->length = 18;
 	new->ip = ip;
-	new->port = port;
+	new->port = htons(port);
 
 	tlv->neighbour = new;