int send_l2_csnp(struct thread *thread);
int send_l1_psnp(struct thread *thread);
int send_l2_psnp(struct thread *thread);
-void send_lsp(void *arg, struct isis_lsp *lsp, enum isis_tx_type tx_type);
+void send_lsp(struct isis_circuit *circuit,
+ struct isis_lsp *lsp, enum isis_tx_type tx_type);
void fill_fixed_hdr(uint8_t pdu_type, struct stream *stream);
int send_hello(struct isis_circuit *circuit, int level);
int isis_handle_pdu(struct isis_circuit *circuit, uint8_t *ssnpa);