H2C_PKT_HDR_SIZE
u16 total_size = H2C_PKT_HDR_SIZE + H2C_PKT_UPDATE_PKT_LEN;
u16 total_size = H2C_PKT_HDR_SIZE + H2C_PKT_CH_SWITCH_LEN;
u16 total_size = H2C_PKT_HDR_SIZE + 4;
u16 total_size = H2C_PKT_HDR_SIZE + 8;
u16 total_size = H2C_PKT_HDR_SIZE + 1;