__printf_2_3 int sc_send_va_buffer(struct stream_cipher_context *scc,
const char *fmt, ...);
int sc_recv_bin_buffer(struct stream_cipher_context *scc, char *buf,
__printf_2_3 int sc_send_va_buffer(struct stream_cipher_context *scc,
const char *fmt, ...);
int sc_recv_bin_buffer(struct stream_cipher_context *scc, char *buf,