[ovs-dev] [PATCH] cfm: Support tagged CCM PDUs.
Ben Pfaff
blp at nicira.com
Thu Nov 3 16:02:20 UTC 2011
On Tue, Nov 01, 2011 at 12:20:11PM -0700, Ethan Jackson wrote:
> diff --git a/lib/cfm.c b/lib/cfm.c
> index 0d79bee..8ba399c 100644
> --- a/lib/cfm.c
> +++ b/lib/cfm.c
> @@ -93,6 +93,7 @@ struct cfm {
> uint32_t seq; /* The sequence number of our last CCM. */
> uint8_t ccm_interval; /* The CCM transmission interval. */
> int ccm_interval_ms; /* 'ccm_interval' in milliseconds. */
> + uint16_t ccm_vlan; /* Vlan tag of CCM PDUs. */
> uint8_t maid[CCM_MAID_LEN]; /* The MAID of this CFM. */
>
> struct timer tx_timer; /* Send CCM when expired. */
> @@ -345,8 +346,14 @@ cfm_compose_ccm(struct cfm *cfm, struct ofpbuf *packet,
> struct ccm *ccm;
>
> timer_set_duration(&cfm->tx_timer, cfm->ccm_interval_ms);
> - ccm = eth_compose(packet, cfm_ccm_addr(cfm), eth_src, ETH_TYPE_CFM,
> - sizeof *ccm);
> + packet->l3 = eth_compose(packet, cfm_ccm_addr(cfm), eth_src, ETH_TYPE_CFM,
> + sizeof *ccm);
I think that it would make sense for eth_compose() to set ->l2 and
->l3, and then we wouldn't have to do it here (which looked a little
funny to me at first glance).
> + if (cfm->ccm_vlan) {
> + eth_push_vlan(packet, htons(cfm->ccm_vlan));
> + }
> +
> + ccm = packet->l3;
> ccm->mdlevel_version = 0;
> ccm->opcode = CCM_OPCODE;
> ccm->tlv_offset = 70;
Otherwise this looks fine, thanks.
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