* Authors:
* Lennert Buytenhek <buytenh@gnu.org>
*
- * $Id: br_stp_bpdu.c,v 1.3 2001/11/10 02:35:25 davem Exp $
- *
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
#include <linux/netfilter_bridge.h>
#include <linux/etherdevice.h>
#include <linux/llc.h>
+#include <net/net_namespace.h>
+#include <net/llc.h>
#include <net/llc_pdu.h>
+#include <net/stp.h>
+#include <asm/unaligned.h>
#include "br_private.h"
#include "br_private_stp.h"
#define STP_HZ 256
-static void br_send_bpdu(struct net_bridge_port *p, unsigned char *data, int length)
+#define LLC_RESERVE sizeof(struct llc_pdu_un)
+
+static void br_send_bpdu(struct net_bridge_port *p,
+ const unsigned char *data, int length)
{
- struct net_device *dev;
struct sk_buff *skb;
- int size;
- if (!p->br->stp_enabled)
+ skb = dev_alloc_skb(length+LLC_RESERVE);
+ if (!skb)
return;
- size = length + 2*ETH_ALEN + 2;
- if (size < 60)
- size = 60;
+ skb->dev = p->dev;
+ skb->protocol = htons(ETH_P_802_2);
- dev = p->dev;
+ skb_reserve(skb, LLC_RESERVE);
+ memcpy(__skb_put(skb, length), data, length);
- if ((skb = dev_alloc_skb(size)) == NULL) {
- printk(KERN_INFO "br: memory squeeze!\n");
- return;
- }
+ llc_pdu_header_init(skb, LLC_PDU_TYPE_U, LLC_SAP_BSPAN,
+ LLC_SAP_BSPAN, LLC_PDU_CMD);
+ llc_pdu_init_as_ui_cmd(skb);
- skb->dev = dev;
- skb->protocol = htons(ETH_P_802_2);
- skb->mac.raw = skb_put(skb, size);
- memcpy(skb->mac.raw, bridge_ula, ETH_ALEN);
- memcpy(skb->mac.raw+ETH_ALEN, dev->dev_addr, ETH_ALEN);
- skb->mac.raw[2*ETH_ALEN] = 0;
- skb->mac.raw[2*ETH_ALEN+1] = length;
- skb->nh.raw = skb->mac.raw + 2*ETH_ALEN + 2;
- memcpy(skb->nh.raw, data, length);
- memset(skb->nh.raw + length, 0xa5, size - length - 2*ETH_ALEN - 2);
+ llc_mac_hdr_init(skb, p->dev->dev_addr, p->br->group_addr);
NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_OUT, skb, NULL, skb->dev,
dev_queue_xmit);
{
unsigned long ticks = (STP_HZ * j)/ HZ;
- *((__be16 *) dest) = htons(ticks);
+ put_unaligned_be16(ticks, dest);
}
static inline int br_get_ticks(const unsigned char *src)
{
- unsigned long ticks = ntohs(*(__be16 *)src);
+ unsigned long ticks = get_unaligned_be16(src);
- return (ticks * HZ + STP_HZ - 1) / STP_HZ;
+ return DIV_ROUND_UP(ticks * HZ, STP_HZ);
}
/* called under bridge lock */
void br_send_config_bpdu(struct net_bridge_port *p, struct br_config_bpdu *bpdu)
{
- unsigned char buf[38];
-
- buf[0] = 0x42;
- buf[1] = 0x42;
- buf[2] = 0x03;
- buf[3] = 0;
- buf[4] = 0;
- buf[5] = 0;
- buf[6] = BPDU_TYPE_CONFIG;
- buf[7] = (bpdu->topology_change ? 0x01 : 0) |
+ unsigned char buf[35];
+
+ if (p->br->stp_enabled != BR_KERNEL_STP)
+ return;
+
+ buf[0] = 0;
+ buf[1] = 0;
+ buf[2] = 0;
+ buf[3] = BPDU_TYPE_CONFIG;
+ buf[4] = (bpdu->topology_change ? 0x01 : 0) |
(bpdu->topology_change_ack ? 0x80 : 0);
- buf[8] = bpdu->root.prio[0];
- buf[9] = bpdu->root.prio[1];
- buf[10] = bpdu->root.addr[0];
- buf[11] = bpdu->root.addr[1];
- buf[12] = bpdu->root.addr[2];
- buf[13] = bpdu->root.addr[3];
- buf[14] = bpdu->root.addr[4];
- buf[15] = bpdu->root.addr[5];
- buf[16] = (bpdu->root_path_cost >> 24) & 0xFF;
- buf[17] = (bpdu->root_path_cost >> 16) & 0xFF;
- buf[18] = (bpdu->root_path_cost >> 8) & 0xFF;
- buf[19] = bpdu->root_path_cost & 0xFF;
- buf[20] = bpdu->bridge_id.prio[0];
- buf[21] = bpdu->bridge_id.prio[1];
- buf[22] = bpdu->bridge_id.addr[0];
- buf[23] = bpdu->bridge_id.addr[1];
- buf[24] = bpdu->bridge_id.addr[2];
- buf[25] = bpdu->bridge_id.addr[3];
- buf[26] = bpdu->bridge_id.addr[4];
- buf[27] = bpdu->bridge_id.addr[5];
- buf[28] = (bpdu->port_id >> 8) & 0xFF;
- buf[29] = bpdu->port_id & 0xFF;
-
- br_set_ticks(buf+30, bpdu->message_age);
- br_set_ticks(buf+32, bpdu->max_age);
- br_set_ticks(buf+34, bpdu->hello_time);
- br_set_ticks(buf+36, bpdu->forward_delay);
-
- br_send_bpdu(p, buf, 38);
+ buf[5] = bpdu->root.prio[0];
+ buf[6] = bpdu->root.prio[1];
+ buf[7] = bpdu->root.addr[0];
+ buf[8] = bpdu->root.addr[1];
+ buf[9] = bpdu->root.addr[2];
+ buf[10] = bpdu->root.addr[3];
+ buf[11] = bpdu->root.addr[4];
+ buf[12] = bpdu->root.addr[5];
+ buf[13] = (bpdu->root_path_cost >> 24) & 0xFF;
+ buf[14] = (bpdu->root_path_cost >> 16) & 0xFF;
+ buf[15] = (bpdu->root_path_cost >> 8) & 0xFF;
+ buf[16] = bpdu->root_path_cost & 0xFF;
+ buf[17] = bpdu->bridge_id.prio[0];
+ buf[18] = bpdu->bridge_id.prio[1];
+ buf[19] = bpdu->bridge_id.addr[0];
+ buf[20] = bpdu->bridge_id.addr[1];
+ buf[21] = bpdu->bridge_id.addr[2];
+ buf[22] = bpdu->bridge_id.addr[3];
+ buf[23] = bpdu->bridge_id.addr[4];
+ buf[24] = bpdu->bridge_id.addr[5];
+ buf[25] = (bpdu->port_id >> 8) & 0xFF;
+ buf[26] = bpdu->port_id & 0xFF;
+
+ br_set_ticks(buf+27, bpdu->message_age);
+ br_set_ticks(buf+29, bpdu->max_age);
+ br_set_ticks(buf+31, bpdu->hello_time);
+ br_set_ticks(buf+33, bpdu->forward_delay);
+
+ br_send_bpdu(p, buf, 35);
}
/* called under bridge lock */
void br_send_tcn_bpdu(struct net_bridge_port *p)
{
- unsigned char buf[7];
-
- buf[0] = 0x42;
- buf[1] = 0x42;
- buf[2] = 0x03;
- buf[3] = 0;
- buf[4] = 0;
- buf[5] = 0;
- buf[6] = BPDU_TYPE_TCN;
- br_send_bpdu(p, buf, 7);
+ unsigned char buf[4];
+
+ if (p->br->stp_enabled != BR_KERNEL_STP)
+ return;
+
+ buf[0] = 0;
+ buf[1] = 0;
+ buf[2] = 0;
+ buf[3] = BPDU_TYPE_TCN;
+ br_send_bpdu(p, buf, 4);
}
/*
*
* NO locks, but rcu_read_lock (preempt_disabled)
*/
-int br_stp_rcv(struct sk_buff *skb, struct net_device *dev,
- struct packet_type *pt, struct net_device *orig_dev)
+void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
+ struct net_device *dev)
{
- const struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb);
const unsigned char *dest = eth_hdr(skb)->h_dest;
struct net_bridge_port *p = rcu_dereference(dev->br_port);
struct net_bridge *br;
if (!p)
goto err;
- if (pdu->ssap != LLC_SAP_BSPAN
- || pdu->dsap != LLC_SAP_BSPAN
- || pdu->ctrl_1 != LLC_PDU_TYPE_U)
- goto err;
-
if (!pskb_may_pull(skb, 4))
goto err;
br = p->br;
spin_lock(&br->lock);
- if (p->state == BR_STATE_DISABLED
- || !br->stp_enabled
- || !(br->dev->flags & IFF_UP))
+ if (br->stp_enabled != BR_KERNEL_STP)
+ goto out;
+
+ if (!(br->dev->flags & IFF_UP))
+ goto out;
+
+ if (p->state == BR_STATE_DISABLED)
goto out;
- if (compare_ether_addr(dest, bridge_ula) != 0)
+ if (compare_ether_addr(dest, br->group_addr) != 0)
goto out;
buf = skb_pull(skb, 3);
spin_unlock(&br->lock);
err:
kfree_skb(skb);
- return 0;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff