+static int build_report(struct sk_buff *skb, u8 proto,
+ struct xfrm_selector *sel, xfrm_address_t *addr)
+{
+ struct xfrm_user_report *ur;
+ struct nlmsghdr *nlh;
+ unsigned char *b = skb->tail;
+
+ nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur));
+ ur = NLMSG_DATA(nlh);
+ nlh->nlmsg_flags = 0;
+
+ ur->proto = proto;
+ memcpy(&ur->sel, sel, sizeof(ur->sel));
+
+ if (addr)
+ RTA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
+
+ nlh->nlmsg_len = skb->tail - b;
+ return skb->len;
+
+nlmsg_failure:
+rtattr_failure:
+ skb_trim(skb, b - skb->data);
+ return -1;
+}
+
+static int xfrm_send_report(u8 proto, struct xfrm_selector *sel,
+ xfrm_address_t *addr)
+{
+ struct sk_buff *skb;
+ size_t len;
+
+ len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(struct xfrm_user_report)));
+ skb = alloc_skb(len, GFP_ATOMIC);
+ if (skb == NULL)
+ return -ENOMEM;
+
+ if (build_report(skb, proto, sel, addr) < 0)
+ BUG();
+
+ NETLINK_CB(skb).dst_group = XFRMNLGRP_REPORT;
+ return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
+}
+