STRUCT CANXL_FRAME(9)

💅 struct canxl_frame(9)

okay bestie, so this page is from the Kernel API Manual and it's literally all about struct canxl_frame — that's the CAN with e'X'tended frame 'L'ength frame structure. yes the title spells it out with those little quotes, we love a dramatic acronym reveal ✨

🌸 SYNOPSIS 🌸

here's the whole struct, character for character, no cap:

struct canxl_frame {
    canid_t prio;
    __u8 flags;
    __u8 sdt;
    __u16 len;
    __u32 af;
    __u8 data[CANXL_MAX_DLEN];
 };

🎀 Members 🎀

• prio — the 11 bit arbitration priority, and the CAN_*_FLAG flags inside it are zero'ed out / it's also the VCID. multitasking icon honestly 👑
• flags — extra flags for CAN XL 🦋
• sdt — the SDU (that's service data unit, iykyk) type
• len — frame payload length in byte, and it lives in the range CANXL_MIN_DLEN .. CANXL_MAX_DLEN
• af — the acceptance field
• data — the actual CAN XL frame payload, CANXL_MIN_DLEN .. CANXL_MAX_DLEN byte 🍓

🦋 Description 🦋

so the tea is: prio shares the exact same position as can_id from struct can[fd]_frame. like, same seat at the table, same coordinates. periodt 💅

⭐ SEE ALSO ⭐

• Kernel file ./include/uapi/linux/can.h
• struct can_frame(9)
• struct canfd_frame(9)
• struct sockaddr_can(9)
• struct can_filter(9)

go read those too, they're iconic in their own right 🫶

and that's the whole vibe, bestie 💖 this cutie lives in ./include/uapi/linux, dated October 2026, and yes the footer says struct canxl_frame(9) too — main character energy from top to bottom 🌈👑