diff options
Diffstat (limited to 'net/hsr/hsr_framereg.c')
| -rw-r--r-- | net/hsr/hsr_framereg.c | 65 |
1 files changed, 52 insertions, 13 deletions
diff --git a/net/hsr/hsr_framereg.c b/net/hsr/hsr_framereg.c index e31949479305..0775f0f95dbf 100644 --- a/net/hsr/hsr_framereg.c +++ b/net/hsr/hsr_framereg.c @@ -76,8 +76,8 @@ static struct hsr_node *find_node_by_addr_A(struct list_head *node_db, * frames from self that's been looped over the HSR ring. */ int hsr_create_self_node(struct hsr_priv *hsr, - unsigned char addr_a[ETH_ALEN], - unsigned char addr_b[ETH_ALEN]) + const unsigned char addr_a[ETH_ALEN], + const unsigned char addr_b[ETH_ALEN]) { struct list_head *self_node_db = &hsr->self_node_db; struct hsr_node *node, *oldnode; @@ -265,11 +265,14 @@ void hsr_handle_sup_frame(struct hsr_frame_info *frame) struct hsr_port *port_rcv = frame->port_rcv; struct hsr_priv *hsr = port_rcv->hsr; struct hsr_sup_payload *hsr_sp; + struct hsr_sup_tlv *hsr_sup_tlv; struct hsr_node *node_real; struct sk_buff *skb = NULL; struct list_head *node_db; struct ethhdr *ethhdr; int i; + unsigned int pull_size = 0; + unsigned int total_pull_size = 0; /* Here either frame->skb_hsr or frame->skb_prp should be * valid as supervision frame always will have protocol @@ -284,18 +287,26 @@ void hsr_handle_sup_frame(struct hsr_frame_info *frame) if (!skb) return; - ethhdr = (struct ethhdr *)skb_mac_header(skb); - /* Leave the ethernet header. */ - skb_pull(skb, sizeof(struct ethhdr)); + pull_size = sizeof(struct ethhdr); + skb_pull(skb, pull_size); + total_pull_size += pull_size; + + ethhdr = (struct ethhdr *)skb_mac_header(skb); /* And leave the HSR tag. */ - if (ethhdr->h_proto == htons(ETH_P_HSR)) - skb_pull(skb, sizeof(struct hsr_tag)); + if (ethhdr->h_proto == htons(ETH_P_HSR)) { + pull_size = sizeof(struct ethhdr); + skb_pull(skb, pull_size); + total_pull_size += pull_size; + } /* And leave the HSR sup tag. */ - skb_pull(skb, sizeof(struct hsr_sup_tag)); + pull_size = sizeof(struct hsr_tag); + skb_pull(skb, pull_size); + total_pull_size += pull_size; + /* get HSR sup payload */ hsr_sp = (struct hsr_sup_payload *)skb->data; /* Merge node_curr (registered on macaddress_B) into node_real */ @@ -312,6 +323,37 @@ void hsr_handle_sup_frame(struct hsr_frame_info *frame) /* Node has already been merged */ goto done; + /* Leave the first HSR sup payload. */ + pull_size = sizeof(struct hsr_sup_payload); + skb_pull(skb, pull_size); + total_pull_size += pull_size; + + /* Get second supervision tlv */ + hsr_sup_tlv = (struct hsr_sup_tlv *)skb->data; + /* And check if it is a redbox mac TLV */ + if (hsr_sup_tlv->HSR_TLV_type == PRP_TLV_REDBOX_MAC) { + /* We could stop here after pushing hsr_sup_payload, + * or proceed and allow macaddress_B and for redboxes. + */ + /* Sanity check length */ + if (hsr_sup_tlv->HSR_TLV_length != 6) + goto done; + + /* Leave the second HSR sup tlv. */ + pull_size = sizeof(struct hsr_sup_tlv); + skb_pull(skb, pull_size); + total_pull_size += pull_size; + + /* Get redbox mac address. */ + hsr_sp = (struct hsr_sup_payload *)skb->data; + + /* Check if redbox mac and node mac are equal. */ + if (!ether_addr_equal(node_real->macaddress_A, hsr_sp->macaddress_A)) { + /* This is a redbox supervision frame for a VDAN! */ + goto done; + } + } + ether_addr_copy(node_real->macaddress_B, ethhdr->h_source); for (i = 0; i < HSR_PT_PORTS; i++) { if (!node_curr->time_in_stale[i] && @@ -331,11 +373,8 @@ void hsr_handle_sup_frame(struct hsr_frame_info *frame) kfree_rcu(node_curr, rcu_head); done: - /* PRP uses v0 header */ - if (ethhdr->h_proto == htons(ETH_P_HSR)) - skb_push(skb, sizeof(struct hsrv1_ethhdr_sp)); - else - skb_push(skb, sizeof(struct hsrv0_ethhdr_sp)); + /* Push back here */ + skb_push(skb, total_pull_size); } /* 'skb' is a frame meant for this host, that is to be passed to upper layers. |