static int ieee802154_parse_frame_start(struct sk_buff *skb, struct ieee802154_hdr *hdr) { int hlen; struct ieee802154_mac_cb *cb = mac_cb_init(skb); skb_reset_mac_header(skb); hlen = ieee802154_hdr_pull(skb, hdr); if (hlen < 0) return -EINVAL; skb->mac_len = hlen; pr_debug("fc: %04x dsn: %02x\n", le16_to_cpup((__le16 *)&hdr->fc), hdr->seq); cb->type = hdr->fc.type; cb->ackreq = hdr->fc.ack_request; cb->secen = hdr->fc.security_enabled; ieee802154_print_addr("destination", &hdr->dest); ieee802154_print_addr("source", &hdr->source); cb->source = hdr->source; cb->dest = hdr->dest; if (hdr->fc.security_enabled) { u64 key; pr_debug("seclevel %i\n", hdr->sec.level); switch (hdr->sec.key_id_mode) { case IEEE802154_SCF_KEY_IMPLICIT: pr_debug("implicit key\n"); break; case IEEE802154_SCF_KEY_INDEX: pr_debug("key %02x\n", hdr->sec.key_id); break; case IEEE802154_SCF_KEY_SHORT_INDEX: pr_debug("key %04x:%04x %02x\n", le32_to_cpu(hdr->sec.short_src) >> 16, le32_to_cpu(hdr->sec.short_src) & 0xffff, hdr->sec.key_id); break; case IEEE802154_SCF_KEY_HW_INDEX: key = swab64((__force u64)hdr->sec.extended_src); pr_debug("key source %8phC %02x\n", &key, hdr->sec.key_id); break; } }
static int dgram_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, size_t size) { struct net_device *dev; unsigned int mtu; struct sk_buff *skb; struct ieee802154_mac_cb *cb; struct dgram_sock *ro = dgram_sk(sk); struct ieee802154_addr dst_addr; int hlen, tlen; int err; if (msg->msg_flags & MSG_OOB) { pr_debug("msg->msg_flags = 0x%x\n", msg->msg_flags); return -EOPNOTSUPP; } if (!ro->connected && !msg->msg_name) return -EDESTADDRREQ; else if (ro->connected && msg->msg_name) return -EISCONN; if (!ro->bound) dev = dev_getfirstbyhwtype(sock_net(sk), ARPHRD_IEEE802154); else dev = ieee802154_get_dev(sock_net(sk), &ro->src_addr); if (!dev) { pr_debug("no dev\n"); err = -ENXIO; goto out; } mtu = dev->mtu; pr_debug("name = %s, mtu = %u\n", dev->name, mtu); if (size > mtu) { pr_debug("size = %Zu, mtu = %u\n", size, mtu); err = -EMSGSIZE; goto out_dev; } hlen = LL_RESERVED_SPACE(dev); tlen = dev->needed_tailroom; skb = sock_alloc_send_skb(sk, hlen + tlen + size, msg->msg_flags & MSG_DONTWAIT, &err); if (!skb) goto out_dev; skb_reserve(skb, hlen); skb_reset_network_header(skb); cb = mac_cb_init(skb); cb->type = IEEE802154_FC_TYPE_DATA; cb->ackreq = ro->want_ack; if (msg->msg_name) { DECLARE_SOCKADDR(struct sockaddr_ieee802154*, daddr, msg->msg_name); ieee802154_addr_from_sa(&dst_addr, &daddr->addr); } else {