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Spanning tree so far saw only physical ports. Two ports aggregated towards the same neighbour look to the protocol like two parallel paths, so it blocks one of them and cuts the group in half. Give each of the four groups an STP entity of its own, numbered above the physical ports. A member port answers to its group: BPDUs arriving on it are accounted to the entity, the entity's state is written to every member together, and its BPDUs carry the state of a live member. Ports outside any group keep behaving exactly as before. Membership comes from the aggregation tables once a second; when it changed, the entity's state is reapplied to the new set of members. The CLI takes lag <1-4> wherever it takes port <n>, the web UI shows a group as one row, and the saved config keeps the lag form of the commands.
63 lines
2.4 KiB
C
63 lines
2.4 KiB
C
#ifndef _RTL837X_STP_H_
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#define _RTL837X_STP_H_
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#include <stdint.h>
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void stp_in(void) __banked;
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void stp_setup(void) __banked;
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void stp_timers(void) __banked;
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void stp_off(void) __banked;
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void stp_parse(void) __banked __reentrant;
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void stp_defaults(void) __banked;
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/* Tick rate of stp_timers(), also used by the web UI. */
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#define STP_HZ 50
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#define STP_LAG_BASE 10
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#define STP_LAG_COUNT 4
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#define STP_ENTITIES (STP_LAG_BASE + STP_LAG_COUNT)
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/* Bridge identifier as carried in a BPDU (priority, extension, MAC). */
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struct bridge {
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uint8_t prio;
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uint8_t ext;
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uint8_t mac[6];
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};
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extern __xdata uint8_t stp_prio;
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extern __xdata uint8_t stp_hello_s;
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extern __xdata uint8_t stp_maxage_s;
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extern __xdata uint8_t stp_fwddelay_s;
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extern __xdata uint8_t stp_rstp;
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extern __xdata uint8_t stp_txhold;
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/* Per-port config/status flags (stp_pflags[]) */
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#define STP_PF_ENABLED 0x01 /* port participates in STP (default on) */
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#define STP_PF_ADMEDGE 0x02 /* admin edge: forwarding immediately */
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#define STP_PF_AUTOEDGE 0x04 /* auto edge: forward after 3 s without BPDU */
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#define STP_PF_BPDUGUARD 0x08 /* disable port if a BPDU arrives */
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#define STP_PF_ROOTGUARD 0x10 /* never accept a better root on this port */
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#define STP_PF_FILTER 0x20 /* neither send nor accept BPDUs */
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#define STP_PF_OPEREDGE 0x40 /* runtime: port went forwarding as an edge */
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#define STP_PF_TRIPPED 0x80 /* runtime: disabled by BPDU guard */
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extern __xdata uint8_t stp_pflags[STP_ENTITIES];
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extern __xdata uint32_t stp_pcost[STP_ENTITIES]; /* path cost; 0 = auto (20000) */
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extern __xdata uint8_t stp_pprio[STP_ENTITIES];
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extern __xdata uint8_t stp_pp2p[STP_ENTITIES];
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extern __xdata uint8_t stp_ent_of[10]; /* the STP entity a port answers to: itself, or its lag */
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extern __xdata uint16_t stp_lag_mask[STP_LAG_COUNT]; /* member ports of each lag; 0 = not part of STP */
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/* Last-heard designated info per port (from received BPDUs); consult
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* stp_bpdu_age to decide whether it is still current. */
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extern __xdata struct bridge stp_dbridge[STP_ENTITIES];
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extern __xdata uint16_t stp_dpid[STP_ENTITIES];
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extern __xdata uint32_t stp_dcost[STP_ENTITIES];
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extern __xdata uint16_t stp_bpdu_age[STP_ENTITIES]; /* ticks since a BPDU was heard */
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extern __xdata struct bridge root_bridge;
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extern __xdata uint32_t root_bridge_cost;
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extern __xdata uint8_t stp_root_port;
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extern __xdata uint16_t stp_tc_count;
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#endif
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