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[SCTP]: Introduce sctp_hdr()

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

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 2007-03-13 13:59:32 -03:00 committed by David S. Miller
parent 967b05f64e
commit 2c0fd387b0
4 changed files with 20 additions and 17 deletions
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9
include/linux/sctp.h
View file

@ -63,6 +63,15 @@ typedef struct sctphdr {
__be32 checksum;
} __attribute__((packed)) sctp_sctphdr_t;
#ifdef __KERNEL__
#include <linux/skbuff.h>
static inline struct sctphdr *sctp_hdr(const struct sk_buff *skb)
{
return (struct sctphdr *)skb->h.raw;
}
#endif
/* Section 3.2. Chunk Field Descriptions. */
typedef struct sctp_chunkhdr {
__u8 type;

14
net/sctp/input.c
View file

@ -79,14 +79,10 @@ static void sctp_add_backlog(struct sock *sk, struct sk_buff *skb);
/* Calculate the SCTP checksum of an SCTP packet. */
static inline int sctp_rcv_checksum(struct sk_buff *skb)
{
struct sctphdr *sh;
__u32 cmp, val;
struct sk_buff *list = skb_shinfo(skb)->frag_list;
sh = (struct sctphdr *) skb->h.raw;
cmp = ntohl(sh->checksum);
val = sctp_start_cksum((__u8 *)sh, skb_headlen(skb));
struct sctphdr *sh = sctp_hdr(skb);
__u32 cmp = ntohl(sh->checksum);
__u32 val = sctp_start_cksum((__u8 *)sh, skb_headlen(skb));
for (; list; list = list->next)
val = sctp_update_cksum((__u8 *)list->data, skb_headlen(list),
@ -138,7 +134,7 @@ int sctp_rcv(struct sk_buff *skb)
if (skb_linearize(skb))
goto discard_it;
sh = (struct sctphdr *) skb->h.raw;
sh = sctp_hdr(skb);
/* Pull up the IP and SCTP headers. */
__skb_pull(skb, skb_transport_offset(skb));
@ -905,7 +901,7 @@ static struct sctp_association *__sctp_rcv_init_lookup(struct sk_buff *skb,
struct sctp_association *asoc;
union sctp_addr addr;
union sctp_addr *paddr = &addr;
struct sctphdr *sh = (struct sctphdr *) skb->h.raw;
struct sctphdr *sh = sctp_hdr(skb);
sctp_chunkhdr_t *ch;
union sctp_params params;
sctp_init_chunk_t *init;

4
net/sctp/ipv6.c
View file

@ -390,7 +390,7 @@ static void sctp_v6_from_skb(union sctp_addr *addr,struct sk_buff *skb,
addr->v6.sin6_flowinfo = 0; /* FIXME */
addr->v6.sin6_scope_id = ((struct inet6_skb_parm *)skb->cb)->iif;
sh = (struct sctphdr *) skb->h.raw;
sh = sctp_hdr(skb);
if (is_saddr) {
*port = sh->source;
from = &ipv6_hdr(skb)->saddr;
@ -765,7 +765,7 @@ static void sctp_inet6_skb_msgname(struct sk_buff *skb, char *msgname,
if (msgname) {
sctp_inet6_msgname(msgname, addr_len);
sin6 = (struct sockaddr_in6 *)msgname;
sh = (struct sctphdr *)skb->h.raw;
sh = sctp_hdr(skb);
sin6->sin6_port = sh->source;
/* Map ipv4 address into v4-mapped-on-v6 address. */

10
net/sctp/protocol.c
View file

@ -235,7 +235,7 @@ static void sctp_v4_from_skb(union sctp_addr *addr, struct sk_buff *skb,
port = &addr->v4.sin_port;
addr->v4.sin_family = AF_INET;
sh = (struct sctphdr *) skb->h.raw;
sh = sctp_hdr(skb);
if (is_saddr) {
*port = sh->source;
from = &ip_hdr(skb)->saddr;
@ -731,13 +731,11 @@ static void sctp_inet_event_msgname(struct sctp_ulpevent *event, char *msgname,
/* Initialize and copy out a msgname from an inbound skb. */
static void sctp_inet_skb_msgname(struct sk_buff *skb, char *msgname, int *len)
{
struct sctphdr *sh;
struct sockaddr_in *sin;
if (msgname) {
struct sctphdr *sh = sctp_hdr(skb);
struct sockaddr_in *sin = (struct sockaddr_in *)msgname;
sctp_inet_msgname(msgname, len);
sin = (struct sockaddr_in *)msgname;
sh = (struct sctphdr *)skb->h.raw;
sin->sin_port = sh->source;
sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
}