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[SK_BUFF]: Introduce igmp_hdr() & friends, remove skb->h.igmph

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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 14:19:23 -03:00 committed by David S. Miller
parent cc70ab261c
commit d9edf9e2be
4 changed files with 33 additions and 13 deletions
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21
include/linux/igmp.h
View File

@ -80,6 +80,27 @@ struct igmpv3_query {
__be32 srcs[0];
};
#ifdef __KERNEL__
#include <linux/skbuff.h>
static inline struct igmphdr *igmp_hdr(const struct sk_buff *skb)
{
return (struct igmphdr *)skb->h.raw;
}
static inline struct igmpv3_report *
igmpv3_report_hdr(const struct sk_buff *skb)
{
return (struct igmpv3_report *)skb->h.raw;
}
static inline struct igmpv3_query *
igmpv3_query_hdr(const struct sk_buff *skb)
{
return (struct igmpv3_query *)skb->h.raw;
}
#endif
#define IGMP_HOST_MEMBERSHIP_QUERY 0x11 /* From RFC1112 */
#define IGMP_HOST_MEMBERSHIP_REPORT 0x12 /* Ditto */
#define IGMP_DVMRP 0x13 /* DVMRP routing */

1
include/linux/skbuff.h
View File

@ -240,7 +240,6 @@ struct sk_buff {
struct tcphdr *th;
struct udphdr *uh;
struct icmphdr *icmph;
struct igmphdr *igmph;
struct iphdr *ipiph;
struct ipv6hdr *ipv6h;
unsigned char *raw;

22
net/ipv4/igmp.c
View File

@ -333,8 +333,8 @@ static struct sk_buff *igmpv3_newpack(struct net_device *dev, int size)
((u8*)&pip[1])[2] = 0;
((u8*)&pip[1])[3] = 0;
pig =(struct igmpv3_report *)skb_put(skb, sizeof(*pig));
skb->h.igmph = (struct igmphdr *)pig;
skb->h.raw = skb_put(skb, sizeof(*pig));
pig = igmpv3_report_hdr(skb);
pig->type = IGMPV3_HOST_MEMBERSHIP_REPORT;
pig->resv1 = 0;
pig->csum = 0;
@ -346,13 +346,13 @@ static struct sk_buff *igmpv3_newpack(struct net_device *dev, int size)
static int igmpv3_sendpack(struct sk_buff *skb)
{
struct iphdr *pip = ip_hdr(skb);
struct igmphdr *pig = skb->h.igmph;
struct igmphdr *pig = igmp_hdr(skb);
const int iplen = skb->tail - skb->nh.raw;
const int igmplen = skb->tail - skb->h.raw;
pip->tot_len = htons(iplen);
ip_send_check(pip);
pig->csum = ip_compute_csum(skb->h.igmph, igmplen);
pig->csum = ip_compute_csum(igmp_hdr(skb), igmplen);
return NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, skb->dev,
dst_output);
@ -379,7 +379,7 @@ static struct sk_buff *add_grhead(struct sk_buff *skb, struct ip_mc_list *pmc,
pgr->grec_auxwords = 0;
pgr->grec_nsrcs = 0;
pgr->grec_mca = pmc->multiaddr;
pih = (struct igmpv3_report *)skb->h.igmph;
pih = igmpv3_report_hdr(skb);
pih->ngrec = htons(ntohs(pih->ngrec)+1);
*ppgr = pgr;
return skb;
@ -412,7 +412,7 @@ static struct sk_buff *add_grec(struct sk_buff *skb, struct ip_mc_list *pmc,
if (!*psf_list)
goto empty_source;
pih = skb ? (struct igmpv3_report *)skb->h.igmph : NULL;
pih = skb ? igmpv3_report_hdr(skb) : NULL;
/* EX and TO_EX get a fresh packet, if needed */
if (truncate) {
@ -829,8 +829,8 @@ static void igmp_heard_report(struct in_device *in_dev, __be32 group)
static void igmp_heard_query(struct in_device *in_dev, struct sk_buff *skb,
int len)
{
struct igmphdr *ih = skb->h.igmph;
struct igmpv3_query *ih3 = (struct igmpv3_query *)ih;
struct igmphdr *ih = igmp_hdr(skb);
struct igmpv3_query *ih3 = igmpv3_query_hdr(skb);
struct ip_mc_list *im;
__be32 group = ih->group;
int max_delay;
@ -863,12 +863,12 @@ static void igmp_heard_query(struct in_device *in_dev, struct sk_buff *skb,
if (!pskb_may_pull(skb, sizeof(struct igmpv3_query)))
return;
ih3 = (struct igmpv3_query *) skb->h.raw;
ih3 = igmpv3_query_hdr(skb);
if (ih3->nsrcs) {
if (!pskb_may_pull(skb, sizeof(struct igmpv3_query)
+ ntohs(ih3->nsrcs)*sizeof(__be32)))
return;
ih3 = (struct igmpv3_query *) skb->h.raw;
ih3 = igmpv3_query_hdr(skb);
}
max_delay = IGMPV3_MRC(ih3->code)*(HZ/IGMP_TIMER_SCALE);
@ -945,7 +945,7 @@ int igmp_rcv(struct sk_buff *skb)
goto drop;
}
ih = skb->h.igmph;
ih = igmp_hdr(skb);
switch (ih->type) {
case IGMP_HOST_MEMBERSHIP_QUERY:
igmp_heard_query(in_dev, skb, len);

2
net/ipv4/ipmr.c
View File

@ -1430,7 +1430,7 @@ int pim_rcv_v1(struct sk_buff * skb)
if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(*encap)))
goto drop;
pim = (struct igmphdr*)skb->h.raw;
pim = igmp_hdr(skb);
if (!mroute_do_pim ||
skb->len < sizeof(*pim) + sizeof(*encap) ||