Jens Osterkamp wrote:
> This is the implementation of the edge control protocol (ECP) as specified
> in IEEE 802.1Qbg.
>
> For this it extends the infrastructure defined lldpad to send and receive
> ECP frames with a new (yet to be defined) ethertype.
> Received frames are validated and analyzed before the content is handed to the
> upper layer protocol (ULP, VDP in this case) for further processing. Frames
> to be transmitted are compiled from VSI (guest interface) profiles registered
> on a interface.
> Reception and transmission of ECP frames is controlled by RX and TX state
> machines, timeouts are handled timeout functions.
> The patch still contains a lot of debug code to allow low-level protocol
> analysis.
>
> Signed-off-by: Jens Osterkamp <jens@xxxxxxxxxxxxxxxxxx>
> ---
> Makefile.am | 2 +
> ecp/ecp.c | 77 +++++++
> ecp/ecp.h | 92 ++++++++
> ecp/ecp_rx.c | 597 ++++++++++++++++++++++++++++++++++++++++++++++++++++
> ecp/ecp_tx.c | 467 ++++++++++++++++++++++++++++++++++++++++
> include/lldp_evb.h | 6 +
> include/lldp_vdp.h | 157 ++++++++++++++
> lldp/l2_packet.h | 2 +
> lldp/ports.h | 25 ++-
> lldp_evb.c | 2 +
> 10 files changed, 1424 insertions(+), 3 deletions(-)
> create mode 100644 ecp/ecp.c
> create mode 100644 ecp/ecp.h
> create mode 100644 ecp/ecp_rx.c
> create mode 100644 ecp/ecp_tx.c
> create mode 100644 include/lldp_vdp.h
>
snip
> +
> +struct vdp_user_data {
> + LIST_HEAD(vdp_head, vdp_data) head;
> +};
> +
> +struct lldp_module *vdp_register(void);
> +void vdp_unregister(struct lldp_module *mod);
> +struct vdp_data *vdp_data(char *ifname);
> +struct packed_tlv *vdp_gettlv(struct port *port, struct vsi_profile *profile);
> +void vdp_vsi_sm_station(struct vsi_profile *profile);
> +struct vsi_profile *vdp_add_profile(struct vsi_profile *profile);
> +
> +#define MAC_ADDR_STRLEN 18
> +#define INSTANCE_STRLEN 32
> +
> +#define PRINT_PROFILE(s, p) \
> +{ int c; \
> + c = sprintf(s, "\nmode: %i\n", p->mode); s += c; \
> + c = sprintf(s, "response: %i\n", p->response); s += c; \
> + c = sprintf(s, "state: %i\n", p->state); s += c; \
> + c = sprintf(s, "mgrid: %i\n", p->mgrid); s += c; \
> + c = sprintf(s, "id: %x%x%x\n", p->id[2], p->id[1], p->id[0]); \
> + s += c; \
> + c = sprintf(s, "version: %i\n", p->version); s += c; \
> + char instance[INSTANCE_STRLEN+2]; \
> + instance2str(p->instance, instance, sizeof(instance)); \
> + c = sprintf(s, "instance: %s\n", &instance); s += c; \
> + char macbuf[MAC_ADDR_STRLEN+1]; \
> + mac2str(p->mac, macbuf, MAC_ADDR_STRLEN); \
> + c = sprintf(s, "mac: %s\n", macbuf); s += c; \
> + c = sprintf(s, "vlan: %i\n\n", p->vlan); s += c; \
> +}
> +
> +#endif /* _LLDP_VDP_H */
> diff --git a/lldp/l2_packet.h b/lldp/l2_packet.h
> index 16f3683..0962429 100644
> --- a/lldp/l2_packet.h
> +++ b/lldp/l2_packet.h
> @@ -36,6 +36,8 @@
>
> #define ETH_P_LLDP 0x88cc
>
> +/* TODO: use extended ethertype until final ethertype is available */
> +#define ETH_P_ECP 0x88b7
>
> #define ETH_FRAME_LEN 1514
>
> diff --git a/lldp/ports.h b/lldp/ports.h
> index 0138efe..c2e18ec 100644
> --- a/lldp/ports.h
> +++ b/lldp/ports.h
> @@ -136,21 +136,40 @@ struct porttlvs{
> struct unpacked_tlv *last_peer;
> };
>
> +struct ecp {
> + struct l2_packet_data *l2;
> + int sequence;
> + int retries;
> + int ackReceived;
> + int ackTimerExpired;
> + u16 lastSequence;
> + u16 seqECPDU;
> + struct portrx rx;
> + struct porttx tx;
> + struct portstats stats;
> +};
> +
This structure is ecp specific and should be part of the ecp module. Not in
ports.h.
> struct port {
> char *ifname;
> u8 hw_resetting;
> u8 portEnabled;
> u8 prevPortEnabled;
> u8 adminStatus;
> - u8 rxChanges;
> - u16 lldpdu;
> +
> + /* protocol specific */
> struct l2_packet_data *l2;
> struct portrx rx;
> struct porttx tx;
> - struct porttlvs tlvs;
> struct portstats stats;
> struct porttimers timers;
> + u8 rxChanges;
> + u16 lldpdu;
> struct msap msap;
> +
> + /* not sure */
> + struct porttlvs tlvs;
> +
> + struct ecp ecp;
> struct port *next;
> };
>
This adds ecp knowledge into the generic port structure I want to keep the port
structure module agnostic. dcbx addresses the same issue by using the module
data space. evb should use a similar scheme and create this structure at
ifup(). Any reason why this can't work?
> diff --git a/lldp_evb.c b/lldp_evb.c
> index bce01b6..b1b7edc 100644
> --- a/lldp_evb.c
> +++ b/lldp_evb.c
> @@ -354,6 +354,8 @@ static void evb_statemachine(struct evb_data *ed, struct tlv_info_evb *tie)
> * different parameters ? Check parameters. switch state back to
> * EVB_CONFIGURE ? */
> printf("%s: state -> EVB_CONFIRMATION\n", __func__);
> + if (ed->tie->scap & LLDP_EVB_CAPABILITY_PROTOCOL_ECP)
> + ecp_init(ed->ifname);
> break;
> default:
> fprintf(stderr, "EVB statemachine reached invalid state !\n");
> --
> 1.7.1
>
>
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