A PRP RedBox must announce the SANs it proxies so peers populate their proxy node tables. The proxy-announce machinery (hsr_proxy_announce(), armed via hsr->redbox) already iterates proxy_node_db under RCU and calls send_sv_frame() once per SAN, but the PRP sender emitted neither the announced SAN MAC nor the RedBox-MAC TLV that IEC 62439-3 requires.
Extend send_prp_supervision_frame() so that, for a proxy-announce (identified by the interlink port, an O(1) test), the frame carries the proxied SAN MAC as MacAddressA followed by the RedBox-MAC TLV (Type 30) and an explicit End-of-TLV marker before padding. hsr_get_node() must also accept the reinjected proxy-announce: a PRP supervision frame is an untagged ETH_P_PRP frame (mac_len == ETH_HLEN, the RCT is appended only on egress) sourced from macaddress_redbox, which is never learned from data. Exempt only PRP supervision frames from the hsr_ethhdr length guard; HSR (ETH_P_HSR) supervision is front-tagged and keeps the original guard, so HSR malformed-frame filtering is unchanged. Signed-off-by: Xin Xie <[email protected]> --- net/hsr/hsr_device.c | 33 ++++++++++++++++++++++++++++++--- net/hsr/hsr_framereg.c | 13 +++++++++++-- 2 files changed, 41 insertions(+), 5 deletions(-) diff --git a/net/hsr/hsr_device.c b/net/hsr/hsr_device.c index 5555b71ab..7cc21253c 100644 --- a/net/hsr/hsr_device.c +++ b/net/hsr/hsr_device.c @@ -372,10 +372,21 @@ static void send_prp_supervision_frame(struct hsr_port *master, { struct hsr_priv *hsr = master->hsr; struct hsr_sup_payload *hsr_sp; + struct hsr_sup_tlv *hsr_stlv; struct hsr_sup_tag *hsr_stag; struct sk_buff *skb; + bool redbox_proxy; + int extra = 0; + + redbox_proxy = hsr->redbox && master->type == HSR_PT_INTERLINK; + + /* A proxy-announce carries a RedBox-MAC TLV and an EOT marker. */ + if (redbox_proxy) + extra = sizeof(struct hsr_sup_tlv) + + sizeof(struct hsr_sup_payload) + + sizeof(struct hsr_sup_tlv); - skb = hsr_init_skb(master, 0); + skb = hsr_init_skb(master, extra); if (!skb) { netdev_warn_once(master->dev, "PRP: Could not send supervision frame\n"); return; @@ -393,9 +404,25 @@ static void send_prp_supervision_frame(struct hsr_port *master, hsr_stag->tlv.HSR_TLV_type = PRP_TLV_LIFE_CHECK_DD; hsr_stag->tlv.HSR_TLV_length = sizeof(struct hsr_sup_payload); - /* Payload: MacAddressA */ + /* Payload: MacAddressA, the announced node. */ hsr_sp = skb_put(skb, sizeof(struct hsr_sup_payload)); - ether_addr_copy(hsr_sp->macaddress_A, master->dev->dev_addr); + ether_addr_copy(hsr_sp->macaddress_A, addr); + + /* Proxy-announce: append the RedBox-MAC TLV (Type 30) and an explicit + * EOT to terminate the TLV chain before zero padding. + */ + if (redbox_proxy) { + hsr_stlv = skb_put(skb, sizeof(struct hsr_sup_tlv)); + hsr_stlv->HSR_TLV_type = PRP_TLV_REDBOX_MAC; + hsr_stlv->HSR_TLV_length = sizeof(struct hsr_sup_payload); + + hsr_sp = skb_put(skb, sizeof(struct hsr_sup_payload)); + ether_addr_copy(hsr_sp->macaddress_A, hsr->macaddress_redbox); + + hsr_stlv = skb_put(skb, sizeof(struct hsr_sup_tlv)); + hsr_stlv->HSR_TLV_type = HSR_TLV_EOT; + hsr_stlv->HSR_TLV_length = 0; + } if (skb_put_padto(skb, ETH_ZLEN)) { spin_unlock_bh(&hsr->seqnr_lock); diff --git a/net/hsr/hsr_framereg.c b/net/hsr/hsr_framereg.c index 7a7c52a95..37ade2dde 100644 --- a/net/hsr/hsr_framereg.c +++ b/net/hsr/hsr_framereg.c @@ -293,8 +293,17 @@ struct hsr_node *hsr_get_node(struct hsr_port *port, struct list_head *node_db, */ if (ethhdr->h_proto == htons(ETH_P_PRP) || ethhdr->h_proto == htons(ETH_P_HSR)) { - /* Check if skb contains hsr_ethhdr */ - if (skb->mac_len < sizeof(struct hsr_ethhdr)) + bool prp_sup; + + /* A PRP supervision frame is an untagged ETH_P_PRP frame + * (mac_len == ETH_HLEN); its RCT is appended only on egress. + * HSR (ETH_P_HSR) supervision is front-tagged and still must + * contain a struct hsr_ethhdr. + */ + prp_sup = hsr->prot_version == PRP_V1 && + ethhdr->h_proto == htons(ETH_P_PRP) && is_sup; + + if (!prp_sup && skb->mac_len < sizeof(struct hsr_ethhdr)) return NULL; } else { rct = skb_get_PRP_rct(skb); -- 2.53.0
