[proto_hep] fix extra chunks memory leak

	Extra chunks (the ones that are not defined in the internal
hep structure) were not freed, causing a memory leak for each hep
packet that had such chunks.

modules/proto_hep/hep.c

@@ -779,3 +779,25 @@ int unpack_hepv3(char *buf, int len, struct hep_desc *h)
 	return 0;
 }
 
+void free_extra_chunks(struct hep_desc* h)
+{
+	generic_chunk_t *it, *foo=NULL;
+	if (h == NULL)
+		return;
+
+	if (h->version < 3 || h->u.hepv3.chunk_list == NULL)
+		return;
+
+	for (it=h->u.hepv3.chunk_list; it; foo=it, it=it->next) {
+		if (foo) {
+			shm_free(foo->data);
+			shm_free(foo);
+		}
+	}
+
+	if (foo) {
+		shm_free(foo->data);
+		shm_free(foo);
+	}
+
+}

modules/proto_hep/hep.h

@@ -236,6 +236,7 @@ int pack_hep(union sockaddr_union* from_su, union sockaddr_union* to_su,
 int unpack_hepv12(char *buf, int len, struct hep_desc* h);
 int unpack_hepv3(char *buf, int len, struct hep_desc *h);
 int unpack_hep(char *buf, int len, int version, struct hep_desc* h);
+void free_extra_chunks(struct hep_desc* h);
 
 
 typedef int (*pack_hep_t)(union sockaddr_union* from_su, union sockaddr_union* to_su,

modules/proto_hep/proto_hep.c

@@ -941,6 +941,8 @@ static inline int hep_handle_req(struct tcp_req *req,
 				receive_msg(msg_buf, msg_len, &local_rcv, ctx) <0)
 				LM_ERR("receive_msg failed \n");
 
+		free_extra_chunks(&hep_ctx->h);
+
 		if (!size && req != &hep_current_req) {
 			/* if we no longer need this tcp_req
 			 * we can free it now */
@@ -1160,7 +1162,6 @@ static int hep_udp_read_req(struct socket_info *si, int* bytes_read)
 #else
 	static char buf [BUF_SIZE+1];
 #endif
-	char *tmp;
 	unsigned int fromlen;
 	str msg;
 
@@ -1281,6 +1282,8 @@ static int hep_udp_read_req(struct socket_info *si, int* bytes_read)
 		receive_msg( msg.s, msg.len, &ri, ctx);
 	}
 
+	free_extra_chunks(&hep_ctx->h);
+
 	return 0;
 
 error_free_hep: