net/sched/em_nbyte.c

1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * net/sched/em_nbyte.c	N-Byte ematch
28 	    data_len < (sizeof(*nbyte) + nbyte->len))  in em_nbyte_change()
29 		return -EINVAL;  in em_nbyte_change()
31 	em->datalen = sizeof(*nbyte) + nbyte->len;  in em_nbyte_change()
32 	em->data = (unsigned long)kmemdup(data, em->datalen, GFP_KERNEL);  in em_nbyte_change()
33 	if (em->data == 0UL)  in em_nbyte_change()
34 		return -ENOMEM;  in em_nbyte_change()
42 	struct nbyte_data *nbyte = (struct nbyte_data *) em->data;  in em_nbyte_match()
43 	unsigned char *ptr = tcf_get_base_ptr(skb, nbyte->hdr.layer);  in em_nbyte_match()
45 	ptr += nbyte->hdr.off;  in em_nbyte_match()
47 	if (!tcf_valid_offset(skb, ptr, nbyte->hdr.len))  in em_nbyte_match()
50 	return !memcmp(ptr, nbyte->pattern, nbyte->hdr.len);  in em_nbyte_match()
71 MODULE_DESCRIPTION("ematch classifier for arbitrary skb multi-bytes");