bpf/progs/test_lwt_seg6local.c

58 	struct ip6_srh_t *srh;
79 	srh = cursor_advance(cursor, sizeof(*srh));
80 	if ((void *)srh + sizeof(*srh) > data_end)
83 	if (srh->type != 4)
86 	return srh;
120 int is_valid_tlv_boundary(struct __sk_buff *skb, struct ip6_srh_t *srh,
128 	srh_off = (char *)srh - (char *)(long)skb->data;
130 	cur_off = srh_off + sizeof(*srh) +
131 		sizeof(struct ip6_addr_t) * (srh->first_segment + 1);
143 		if (cur_off >= srh_off + ((srh->hdrlen + 1) << 3))
179 int add_tlv(struct __sk_buff *skb, struct ip6_srh_t *srh, uint32_t tlv_off,
182 	uint32_t srh_off = (char *)srh - (char *)(long)skb->data;
195 	err = is_valid_tlv_boundary(skb, srh, &tlv_off, &pad_size, &pad_off);
223 int delete_tlv(struct __sk_buff *skb, struct ip6_srh_t *srh,
226 	uint32_t srh_off = (char *)srh - (char *)(long)skb->data;
236 	err = is_valid_tlv_boundary(skb, srh, &tlv_off, &pad_size, &pad_off);
261 int has_egr_tlv(struct __sk_buff *skb, struct ip6_srh_t *srh)
264 		((srh->first_segment + 1) << 4);
292 	struct ip6_srh_t *srh;
296 	srh = (struct ip6_srh_t *)srh_buf;
297 	srh->nexthdr = 0;
298 	srh->hdrlen = 8;
299 	srh->type = 4;
300 	srh->segments_left = 3;
301 	srh->first_segment = 3;
302 	srh->flags = 0;
303 	srh->tag = 0;
305 	seg = (struct ip6_addr_t *)((char *)srh + sizeof(*srh));
314 	err = bpf_lwt_push_encap(skb, 0, (void *)srh, sizeof(srh_buf));
328 	struct ip6_srh_t *srh = get_srh(skb);
333 	if (srh == NULL)
339 	err = add_tlv(skb, srh, (srh->hdrlen+1) << 3,
364 	struct ip6_srh_t *srh = get_srh(skb);
369 	if (srh == NULL)
372 	if (srh->flags != SR6_FLAG_ALERT)
375 	if (srh->hdrlen != 11) // 4 segments + Egress TLV + Padding TLV
378 	if (!has_egr_tlv(skb, srh))
381 	err = delete_tlv(skb, srh, 8 + (srh->first_segment + 1) * 16);
403 	struct ip6_srh_t *srh = get_srh(skb);
407 	if (srh == NULL)
410 	if (srh->flags != 0)
413 	if (srh->tag != bpf_htons(2442))
416 	if (srh->hdrlen != 8) // 4 segments