skb_queue_head – queue a buffer at the list head Synopsis void skb_queue_head(struct sk_buff_head *list, struct sk_buff *newsk); Arguments list list to use newsk buffer to queue Description Queue a buffer at the start of the list. This function takes the list lock and can be used safely with other locking sk_buff functions safely. A buffer…
skb_queue_empty – check if a queue is empty Synopsis int skb_queue_empty(const struct sk_buff_head *list); Arguments list queue head Description Returns true if the queue is empty, false otherwise. Copyright
skb_put_padto – increase size and pad an skbuff up to a minimal size Synopsis int skb_put_padto(struct sk_buff *skb, unsigned int len); Arguments skb buffer to pad len minimal length Description Pads up a buffer to ensure the trailing bytes exist and are blanked. If the buffer already contains sufficient data it is untouched. Otherwise it…
skb_put – add data to a buffer Synopsis unsigned char *skb_put(struct sk_buff *skb, unsigned int len); Arguments skb buffer to use len amount of data to add Description This function extends the used data area of the buffer. If this would exceed the total buffer size the kernel will panic. A pointer to the first…
skb_push_rcsum – push skb and update receive checksum Synopsis unsigned char *skb_push_rcsum(struct sk_buff *skb, unsigned int len); Arguments skb buffer to update len length of data pulled Description This function performs an skb_push on the packet and updates the CHECKSUM_COMPLETE checksum. It should be used on receive path processing instead of skb_push unless you know…
skb_push – add data to the start of a buffer Synopsis unsigned char *skb_push(struct sk_buff *skb, unsigned int len); Arguments skb buffer to use len amount of data to add Description This function extends the used data area of the buffer at the buffer start. If this would exceed the total buffer headroom the kernel…
skb_pull_rcsum – pull skb and update receive checksum Synopsis unsigned char *skb_pull_rcsum(struct sk_buff *skb, unsigned int len); Arguments skb buffer to update len length of data pulled Description This function performs an skb_pull on the packet and updates the CHECKSUM_COMPLETE checksum. It should be used on receive path processing instead of skb_pull unless you know…
skb_pull – remove data from the start of a buffer Synopsis unsigned char *skb_pull(struct sk_buff *skb, unsigned int len); Arguments skb buffer to use len amount of data to remove Description This function removes data from the start of a buffer, returning the memory to the headroom. A pointer to the next data in the…
skb_propagate_pfmemalloc – Propagate pfmemalloc if skb is allocated after RX page Synopsis void skb_propagate_pfmemalloc(struct page *page, struct sk_buff *skb); Arguments page The page that was allocated from skb_alloc_page skb The skb that may need pfmemalloc set Copyright
skb_prepare_seq_read – Prepare a sequential read of skb data Synopsis void skb_prepare_seq_read(struct sk_buff *skb, unsigned int from, unsigned int to, struct skb_seq_state *st); Arguments skb the buffer to read from lower offset of data to be read to upper offset of data to be read st state variable Description Initializes the specified state variable. Must…
skb_postpush_rcsum – update checksum for received skb after push Synopsis void skb_postpush_rcsum(struct sk_buff *skb, const void *start, unsigned int len); Arguments skb buffer to update start start of data after push len length of data pushed Description After doing a push on a received packet, you need to call this to update the CHECKSUM_COMPLETE checksum….
skb_postpull_rcsum – update checksum for received skb after pull Synopsis void skb_postpull_rcsum(struct sk_buff *skb, const void *start, unsigned int len); Arguments skb buffer to update start start of data before pull len length of data pulled Description After doing a pull on a received packet, you need to call this to update the CHECKSUM_COMPLETE checksum,…
skb_peek_tail – peek at the tail of an sk_buff_head Synopsis struct sk_buff *skb_peek_tail(const struct sk_buff_head *list_); Arguments list_ list to peek at Description Peek an sk_buff. Unlike most other operations you _MUST_ be careful with this one. A peek leaves the buffer on the list and someone else may run off with it. You must…
skb_peek_next – peek skb following the given one from a queue Synopsis struct sk_buff *skb_peek_next(struct sk_buff *skb, const struct sk_buff_head *list_); Arguments skb skb to start from list_ list to peek at Description Returns NULL when the end of the list is met or a pointer to the next element. The reference count is not…
skb_peek – peek at the head of an sk_buff_head Synopsis struct sk_buff *skb_peek(const struct sk_buff_head *list_); Arguments list_ list to peek at Description Peek an sk_buff. Unlike most other operations you _MUST_ be careful with this one. A peek leaves the buffer on the list and someone else may run off with it. You must…
skb_partial_csum_set – set up and verify partial csum values for packet Synopsis bool skb_partial_csum_set(struct sk_buff * skb, u16 start, u16 off); Arguments skb the skb to set start the number of bytes after skb->data to start checksumming. off the offset from start to place the checksum. Description For untrusted partially-checksummed packets, we need to make sure the values for…
skb_page_frag_refill – check that a page_frag contains enough room Synopsis bool skb_page_frag_refill(unsigned int sz, struct page_frag * pfrag, gfp_t gfp); Arguments sz minimum size of the fragment we want to get pfrag pointer to page_frag gfp priority for memory allocation Note While this allocator tries to use high order pages, there is no guarantee that allocations succeed. Therefore, sz…
skb_padto – pad an skbuff up to a minimal size Synopsis int skb_padto(struct sk_buff *skb, unsigned int len); Arguments skb buffer to pad len minimal length Description Pads up a buffer to ensure the trailing bytes exist and are blanked. If the buffer already contains sufficient data it is untouched. Otherwise it is extended. Returns…
skb_pad – zero pad the tail of an skb Synopsis int skb_pad(struct sk_buff *skb, int pad); Arguments skb buffer to pad pad space to pad Description Ensure that a buffer is followed by a padding area that is zero filled. Used by network drivers which may DMA or transfer data beyond the buffer end onto…
skb_orphan_frags – orphan the frags contained in a buffer Synopsis int skb_orphan_frags(struct sk_buff *skb, gfp_t gfp_mask); Arguments skb buffer to orphan frags from gfp_mask allocation mask for replacement pages Description For each frag in the SKB which needs a destructor (i.e. has an owner) create a copy of that frag and release the original page…