ちょっと jot: PF_PACKET での vlan

tcpdump で 802.1q の続きになるのか? 2.6.27 にマージされるネットワーク周りのお話で Patrick McHardy さんのいくつか

vlan: uninline __vlan_hwaccel_rx
packet: deliver VLAN TCI to userspace
packet: add PACKET_RESERVE sockopt

あたりが該当しそうだけど...inline ではない、skb->vlan_tci を設定する __vlan_hwaccel_rx() を呼んでいるのは "Chelsio T3-based" なるドライバのみ?

例の lincap.c に新しい setsockopt() してみたが


        /* set VERSION 2 - before pg_vec has set */
        val = TPACKET_V2;
 if ((setsockopt(fd, SOL_PACKET, PACKET_VERSION, (void *)&val, sizeof(val))) != 0) {
                perror("setsockopt(PACKET_VERSION)");
                close(fd);
                return 1;
        }

        val = 4; /* __be16  0x8100, __be16  h_vlan_TCI - before pg_vec has set, too */
        if ((setsockopt(fd, SOL_PACKET, PACKET_RESERVE, (void *)&val, sizeof(val))) != 0) {
                perror("setsockopt(PACKET_RESERVE)");
  close(fd);
                return 1;
 }
.... 
        for (i = 0;;) {
         while (*(unsigned long*)ring[i].iov_base) {
                 struct tpacket2_hdr *h = ring[i].iov_base;
                 struct sockaddr_ll *sll = (void *)h + TPACKET_ALIGN(sizeof(*h));
                        unsigned char *bp = (unsigned char *)h + h->tp_mac;

                        printf("%u.%.6u: if: %u, vid: %u, type: %s, len: %u\n",
                               h->tp_sec, h->tp_nsec,
                 sll->sll_ifindex,
                 h->tp_vlan_tci,
                 names[sll->sll_pkttype],
                        h->tp_len);