| /* |
| * linux/can/skb.h |
| * |
| * Definitions for the CAN network socket buffer |
| * |
| * Copyright (C) 2012 Oliver Hartkopp <socketcan@hartkopp.net> |
| * |
| */ |
| |
| #ifndef CAN_SKB_H |
| #define CAN_SKB_H |
| |
| #include <linux/types.h> |
| #include <linux/can.h> |
| |
| /* |
| * The struct can_skb_priv is used to transport additional information along |
| * with the stored struct can(fd)_frame that can not be contained in existing |
| * struct sk_buff elements. |
| * N.B. that this information must not be modified in cloned CAN sk_buffs. |
| * To modify the CAN frame content or the struct can_skb_priv content |
| * skb_copy() needs to be used instead of skb_clone(). |
| */ |
| |
| /** |
| * struct can_skb_priv - private additional data inside CAN sk_buffs |
| * @ifindex: ifindex of the first interface the CAN frame appeared on |
| * @cf: align to the following CAN frame at skb->data |
| */ |
| struct can_skb_priv { |
| int ifindex; |
| struct can_frame cf[0]; |
| }; |
| |
| static inline struct can_skb_priv *can_skb_prv(struct sk_buff *skb) |
| { |
| return (struct can_skb_priv *)(skb->head); |
| } |
| |
| static inline void can_skb_reserve(struct sk_buff *skb) |
| { |
| skb_reserve(skb, sizeof(struct can_skb_priv)); |
| } |
| |
| #endif /* CAN_SKB_H */ |