Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=90719dbeafdb40a15105ff0c899485b43c2a2a55
Commit: 90719dbeafdb40a15105ff0c899485b43c2a2a55
Parent: 248f06726e866942b3d8ca8f411f9067713b7ff8
Author: Florian Zumbiehl <[EMAIL PROTECTED]>
AuthorDate: Fri Mar 2 13:16:56 2007 -0800
Committer: David S. Miller <[EMAIL PROTECTED]>
CommitDate: Fri Mar 2 20:37:35 2007 -0800
[PPPOE]: Key connections properly on local device.
It is based on the assumption that an interface's ifindex is basically
an alias for a local MAC address, so incoming packets now are matched
to sockets based on remote MAC, session id, and ifindex of the
interface the packet came in on/the socket was bound to by connect().
For relayed packets, the socket that's used for relaying is selected
based on destination MAC, session ID and the interface index of the
interface whose name currently matches the name requested by userspace
as the relaying source interface.
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
---
drivers/net/pppoe.c | 52 +++++++++++++++++++++++++++++++-------------------
1 files changed, 32 insertions(+), 20 deletions(-)
diff --git a/drivers/net/pppoe.c b/drivers/net/pppoe.c
index 860bb0f..86e56f1 100644
--- a/drivers/net/pppoe.c
+++ b/drivers/net/pppoe.c
@@ -7,6 +7,12 @@
*
* Version: 0.7.0
*
+ * 070228 : Fix to allow multiple sessions with same remote MAC and same
+ * session id by including the local device ifindex in the
+ * tuple identifying a session. This also ensures packets can't
+ * be injected into a session from interfaces other than the one
+ * specified by userspace. Florian Zumbiehl <[EMAIL PROTECTED]>
+ * (Oh, BTW, this one is YYMMDD, in case you were wondering ...)
* 220102 : Fix module use count on failure in pppoe_create, pppox_sk -acme
* 030700 : Fixed connect logic to allow for disconnect.
* 270700 : Fixed potential SMP problems; we must protect against
@@ -127,14 +133,14 @@ static struct pppox_sock
*item_hash_table[PPPOE_HASH_SIZE];
* Set/get/delete/rehash items (internal versions)
*
**********************************************************************/
-static struct pppox_sock *__get_item(unsigned long sid, unsigned char *addr)
+static struct pppox_sock *__get_item(unsigned long sid, unsigned char *addr,
int ifindex)
{
int hash = hash_item(sid, addr);
struct pppox_sock *ret;
ret = item_hash_table[hash];
- while (ret && !cmp_addr(&ret->pppoe_pa, sid, addr))
+ while (ret && !(cmp_addr(&ret->pppoe_pa, sid, addr) &&
ret->pppoe_dev->ifindex == ifindex))
ret = ret->next;
return ret;
@@ -147,21 +153,19 @@ static int __set_item(struct pppox_sock *po)
ret = item_hash_table[hash];
while (ret) {
- if (cmp_2_addr(&ret->pppoe_pa, &po->pppoe_pa))
+ if (cmp_2_addr(&ret->pppoe_pa, &po->pppoe_pa) &&
ret->pppoe_dev->ifindex == po->pppoe_dev->ifindex)
return -EALREADY;
ret = ret->next;
}
- if (!ret) {
- po->next = item_hash_table[hash];
- item_hash_table[hash] = po;
- }
+ po->next = item_hash_table[hash];
+ item_hash_table[hash] = po;
return 0;
}
-static struct pppox_sock *__delete_item(unsigned long sid, char *addr)
+static struct pppox_sock *__delete_item(unsigned long sid, char *addr, int
ifindex)
{
int hash = hash_item(sid, addr);
struct pppox_sock *ret, **src;
@@ -170,7 +174,7 @@ static struct pppox_sock *__delete_item(unsigned long sid,
char *addr)
src = &item_hash_table[hash];
while (ret) {
- if (cmp_addr(&ret->pppoe_pa, sid, addr)) {
+ if (cmp_addr(&ret->pppoe_pa, sid, addr) &&
ret->pppoe_dev->ifindex == ifindex) {
*src = ret->next;
break;
}
@@ -188,12 +192,12 @@ static struct pppox_sock *__delete_item(unsigned long
sid, char *addr)
*
**********************************************************************/
static inline struct pppox_sock *get_item(unsigned long sid,
- unsigned char *addr)
+ unsigned char *addr, int ifindex)
{
struct pppox_sock *po;
read_lock_bh(&pppoe_hash_lock);
- po = __get_item(sid, addr);
+ po = __get_item(sid, addr, ifindex);
if (po)
sock_hold(sk_pppox(po));
read_unlock_bh(&pppoe_hash_lock);
@@ -203,7 +207,15 @@ static inline struct pppox_sock *get_item(unsigned long
sid,
static inline struct pppox_sock *get_item_by_addr(struct sockaddr_pppox *sp)
{
- return get_item(sp->sa_addr.pppoe.sid, sp->sa_addr.pppoe.remote);
+ struct net_device *dev = NULL;
+ int ifindex;
+
+ dev = dev_get_by_name(sp->sa_addr.pppoe.dev);
+ if(!dev)
+ return NULL;
+ ifindex = dev->ifindex;
+ dev_put(dev);
+ return get_item(sp->sa_addr.pppoe.sid, sp->sa_addr.pppoe.remote,
ifindex);
}
static inline int set_item(struct pppox_sock *po)
@@ -220,12 +232,12 @@ static inline int set_item(struct pppox_sock *po)
return i;
}
-static inline struct pppox_sock *delete_item(unsigned long sid, char *addr)
+static inline struct pppox_sock *delete_item(unsigned long sid, char *addr,
int ifindex)
{
struct pppox_sock *ret;
write_lock_bh(&pppoe_hash_lock);
- ret = __delete_item(sid, addr);
+ ret = __delete_item(sid, addr, ifindex);
write_unlock_bh(&pppoe_hash_lock);
return ret;
@@ -391,7 +403,7 @@ static int pppoe_rcv(struct sk_buff *skb,
ph = (struct pppoe_hdr *) skb->nh.raw;
- po = get_item((unsigned long) ph->sid, eth_hdr(skb)->h_source);
+ po = get_item((unsigned long) ph->sid, eth_hdr(skb)->h_source,
dev->ifindex);
if (po != NULL)
return sk_receive_skb(sk_pppox(po), skb, 0);
drop:
@@ -425,7 +437,7 @@ static int pppoe_disc_rcv(struct sk_buff *skb,
if (ph->code != PADT_CODE)
goto abort;
- po = get_item((unsigned long) ph->sid, eth_hdr(skb)->h_source);
+ po = get_item((unsigned long) ph->sid, eth_hdr(skb)->h_source,
dev->ifindex);
if (po) {
struct sock *sk = sk_pppox(po);
@@ -517,7 +529,7 @@ static int pppoe_release(struct socket *sock)
po = pppox_sk(sk);
if (po->pppoe_pa.sid) {
- delete_item(po->pppoe_pa.sid, po->pppoe_pa.remote);
+ delete_item(po->pppoe_pa.sid, po->pppoe_pa.remote,
po->pppoe_dev->ifindex);
}
if (po->pppoe_dev)
@@ -539,7 +551,7 @@ static int pppoe_connect(struct socket *sock, struct
sockaddr *uservaddr,
int sockaddr_len, int flags)
{
struct sock *sk = sock->sk;
- struct net_device *dev = NULL;
+ struct net_device *dev;
struct sockaddr_pppox *sp = (struct sockaddr_pppox *) uservaddr;
struct pppox_sock *po = pppox_sk(sk);
int error;
@@ -565,7 +577,7 @@ static int pppoe_connect(struct socket *sock, struct
sockaddr *uservaddr,
pppox_unbind_sock(sk);
/* Delete the old binding */
- delete_item(po->pppoe_pa.sid,po->pppoe_pa.remote);
+
delete_item(po->pppoe_pa.sid,po->pppoe_pa.remote,po->pppoe_dev->ifindex);
if(po->pppoe_dev)
dev_put(po->pppoe_dev);
@@ -705,7 +717,7 @@ static int pppoe_ioctl(struct socket *sock, unsigned int
cmd,
break;
/* PPPoE address from the user specifies an outbound
- PPPoE address to which frames are forwarded to */
+ PPPoE address which frames are forwarded to */
err = -EFAULT;
if (copy_from_user(&po->pppoe_relay,
(void __user *)arg,
-
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