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[PPPOE]: Introduce pppoe_hdr() 

For consistency with all the other skb->nh.raw accessors.

Also do some really obvious simplifications in pppoe_recvmsg, well the
kfree_skb one is not so obvious, but free() and kfree() have the same behaviour
(hint :-) ).

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnaldo Carvalho de Melo 2007-03-10 15:56:08 -03:00 committed by David S. Miller
parent 37e6636669
commit 797659fb4a
2 changed files with 15 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/net/pppoe.c
View File

@ -347,7 +347,7 @@ static int pppoe_rcv_core(struct sock *sk, struct sk_buff *skb)
struct pppox_sock *relay_po = NULL; struct pppox_sock *relay_po = NULL;
if (sk->sk_state & PPPOX_BOUND) { if (sk->sk_state & PPPOX_BOUND) {
struct pppoe_hdr *ph = (struct pppoe_hdr *) skb->nh.raw; struct pppoe_hdr *ph = pppoe_hdr(skb);
int len = ntohs(ph->length); int len = ntohs(ph->length);
skb_pull_rcsum(skb, sizeof(struct pppoe_hdr)); skb_pull_rcsum(skb, sizeof(struct pppoe_hdr));
if (pskb_trim_rcsum(skb, len)) if (pskb_trim_rcsum(skb, len))
@ -401,7 +401,7 @@ static int pppoe_rcv(struct sk_buff *skb,
if (!(skb = skb_share_check(skb, GFP_ATOMIC))) if (!(skb = skb_share_check(skb, GFP_ATOMIC)))
goto out; goto out;
ph = (struct pppoe_hdr *) skb->nh.raw; ph = pppoe_hdr(skb);
po = get_item((unsigned long) ph->sid, eth_hdr(skb)->h_source, dev->ifindex); po = get_item((unsigned long) ph->sid, eth_hdr(skb)->h_source, dev->ifindex);
if (po != NULL) if (po != NULL)
@ -433,7 +433,7 @@ static int pppoe_disc_rcv(struct sk_buff *skb,
if (!(skb = skb_share_check(skb, GFP_ATOMIC))) if (!(skb = skb_share_check(skb, GFP_ATOMIC)))
goto out; goto out;
ph = (struct pppoe_hdr *) skb->nh.raw; ph = pppoe_hdr(skb);
if (ph->code != PADT_CODE) if (ph->code != PADT_CODE)
goto abort; goto abort;
@ -931,8 +931,6 @@ static int pppoe_recvmsg(struct kiocb *iocb, struct socket *sock,
struct sock *sk = sock->sk; struct sock *sk = sock->sk;
struct sk_buff *skb = NULL; struct sk_buff *skb = NULL;
int error = 0; int error = 0;
int len;
struct pppoe_hdr *ph = NULL;
if (sk->sk_state & PPPOX_BOUND) { if (sk->sk_state & PPPOX_BOUND) {
error = -EIO; error = -EIO;
@ -949,19 +947,15 @@ static int pppoe_recvmsg(struct kiocb *iocb, struct socket *sock,
m->msg_namelen = 0; m->msg_namelen = 0;
if (skb) { if (skb) {
error = 0; struct pppoe_hdr *ph = pppoe_hdr(skb);
ph = (struct pppoe_hdr *) skb->nh.raw; const int len = ntohs(ph->length);
len = ntohs(ph->length);
error = memcpy_toiovec(m->msg_iov, (unsigned char *) &ph->tag[0], len); error = memcpy_toiovec(m->msg_iov, (unsigned char *) &ph->tag[0], len);
if (error < 0) if (error == 0)
goto do_skb_free; error = len;
error = len;
} }
do_skb_free: kfree_skb(skb);
if (skb)
kfree_skb(skb);
end: end:
return error; return error;
} }

7
include/linux/if_pppox.h
View File

@ -112,6 +112,13 @@ struct pppoe_hdr {
} __attribute__ ((packed)); } __attribute__ ((packed));
#ifdef __KERNEL__ #ifdef __KERNEL__
#include <linux/skbuff.h>
static inline struct pppoe_hdr *pppoe_hdr(const struct sk_buff *skb)
{
return (struct pppoe_hdr *)skb->nh.raw;
}
struct pppoe_opt { struct pppoe_opt {
struct net_device *dev; /* device associated with socket*/ struct net_device *dev; /* device associated with socket*/
int ifindex; /* ifindex of device associated with socket */ int ifindex; /* ifindex of device associated with socket */