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path: root/net/ipv6/exthdrs.c
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Diffstat (limited to 'net/ipv6/exthdrs.c')
-rw-r--r--net/ipv6/exthdrs.c56
1 files changed, 33 insertions, 23 deletions
diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index fce5abde554..9ebf120ba6d 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -50,13 +50,14 @@
int ipv6_find_tlv(struct sk_buff *skb, int offset, int type)
{
- int packet_len = skb->tail - skb->nh.raw;
+ const unsigned char *nh = skb_network_header(skb);
+ int packet_len = skb->tail - nh;
struct ipv6_opt_hdr *hdr;
int len;
if (offset + 2 > packet_len)
goto bad;
- hdr = (struct ipv6_opt_hdr*)(skb->nh.raw + offset);
+ hdr = (struct ipv6_opt_hdr *)(nh + offset);
len = ((hdr->hdrlen + 1) << 3);
if (offset + len > packet_len)
@@ -66,7 +67,7 @@ int ipv6_find_tlv(struct sk_buff *skb, int offset, int type)
len -= 2;
while (len > 0) {
- int opttype = skb->nh.raw[offset];
+ int opttype = nh[offset];
int optlen;
if (opttype == type)
@@ -77,7 +78,7 @@ int ipv6_find_tlv(struct sk_buff *skb, int offset, int type)
optlen = 1;
break;
default:
- optlen = skb->nh.raw[offset + 1] + 2;
+ optlen = nh[offset + 1] + 2;
if (optlen > len)
goto bad;
break;
@@ -113,7 +114,7 @@ static int ip6_tlvopt_unknown(struct sk_buff **skbp, int optoff)
{
struct sk_buff *skb = *skbp;
- switch ((skb->nh.raw[optoff] & 0xC0) >> 6) {
+ switch ((skb_network_header(skb)[optoff] & 0xC0) >> 6) {
case 0: /* ignore */
return 1;
@@ -141,6 +142,7 @@ static int ip6_parse_tlv(struct tlvtype_proc *procs, struct sk_buff **skbp)
{
struct sk_buff *skb = *skbp;
struct tlvtype_proc *curr;
+ const unsigned char *nh = skb_network_header(skb);
int off = skb->h.raw - skb->nh.raw;
int len = ((skb->h.raw[1]+1)<<3);
@@ -151,9 +153,9 @@ static int ip6_parse_tlv(struct tlvtype_proc *procs, struct sk_buff **skbp)
len -= 2;
while (len > 0) {
- int optlen = skb->nh.raw[off+1]+2;
+ int optlen = nh[off + 1] + 2;
- switch (skb->nh.raw[off]) {
+ switch (nh[off]) {
case IPV6_TLV_PAD0:
optlen = 1;
break;
@@ -165,7 +167,7 @@ static int ip6_parse_tlv(struct tlvtype_proc *procs, struct sk_buff **skbp)
if (optlen > len)
goto bad;
for (curr=procs; curr->type >= 0; curr++) {
- if (curr->type == skb->nh.raw[off]) {
+ if (curr->type == nh[off]) {
/* type specific length/alignment
checks will be performed in the
func(). */
@@ -211,7 +213,7 @@ static int ipv6_dest_hao(struct sk_buff **skbp, int optoff)
opt->dsthao = opt->dst1;
opt->dst1 = 0;
- hao = (struct ipv6_destopt_hao *)(skb->nh.raw + optoff);
+ hao = (struct ipv6_destopt_hao *)(skb_network_header(skb) + optoff);
if (hao->length != 16) {
LIMIT_NETDEBUG(
@@ -244,8 +246,9 @@ static int ipv6_dest_hao(struct sk_buff **skbp, int optoff)
/* update all variable using below by copied skbuff */
*skbp = skb = skb2;
- hao = (struct ipv6_destopt_hao *)(skb2->nh.raw + optoff);
- ipv6h = (struct ipv6hdr *)skb2->nh.raw;
+ hao = (struct ipv6_destopt_hao *)(skb_network_header(skb2) +
+ optoff);
+ ipv6h = skb2->nh.ipv6h;
}
if (skb->ip_summed == CHECKSUM_COMPLETE)
@@ -406,7 +409,8 @@ static int ipv6_rthdr_rcv(struct sk_buff **skbp)
default:
IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
IPSTATS_MIB_INHDRERRORS);
- icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, (&hdr->type) - skb->nh.raw);
+ icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
+ (&hdr->type) - skb_network_header(skb));
return -1;
}
@@ -443,7 +447,7 @@ looped_back:
skb->h.raw += (hdr->hdrlen + 1) << 3;
opt->dst0 = opt->dst1;
opt->dst1 = 0;
- opt->nhoff = (&hdr->nexthdr) - skb->nh.raw;
+ opt->nhoff = (&hdr->nexthdr) - skb_network_header(skb);
return 1;
}
@@ -452,7 +456,9 @@ looped_back:
if (hdr->hdrlen & 0x01) {
IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
IPSTATS_MIB_INHDRERRORS);
- icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, (&hdr->hdrlen) - skb->nh.raw);
+ icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
+ ((&hdr->hdrlen) -
+ skb_network_header(skb)));
return -1;
}
break;
@@ -479,7 +485,9 @@ looped_back:
if (hdr->segments_left > n) {
IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
IPSTATS_MIB_INHDRERRORS);
- icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, (&hdr->segments_left) - skb->nh.raw);
+ icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
+ ((&hdr->segments_left) -
+ skb_network_header(skb)));
return -1;
}
@@ -547,7 +555,7 @@ looped_back:
dst_release(xchg(&skb->dst, NULL));
ip6_route_input(skb);
if (skb->dst->error) {
- skb_push(skb, skb->data - skb->nh.raw);
+ skb_push(skb, skb->data - skb_network_header(skb));
dst_input(skb);
return -1;
}
@@ -565,7 +573,7 @@ looped_back:
goto looped_back;
}
- skb_push(skb, skb->data - skb->nh.raw);
+ skb_push(skb, skb->data - skb_network_header(skb));
dst_input(skb);
return -1;
}
@@ -656,13 +664,14 @@ EXPORT_SYMBOL_GPL(ipv6_invert_rthdr);
static int ipv6_hop_ra(struct sk_buff **skbp, int optoff)
{
struct sk_buff *skb = *skbp;
+ const unsigned char *nh = skb_network_header(skb);
- if (skb->nh.raw[optoff+1] == 2) {
+ if (nh[optoff + 1] == 2) {
IP6CB(skb)->ra = optoff;
return 1;
}
LIMIT_NETDEBUG(KERN_DEBUG "ipv6_hop_ra: wrong RA length %d\n",
- skb->nh.raw[optoff+1]);
+ nh[optoff + 1]);
kfree_skb(skb);
return 0;
}
@@ -672,17 +681,18 @@ static int ipv6_hop_ra(struct sk_buff **skbp, int optoff)
static int ipv6_hop_jumbo(struct sk_buff **skbp, int optoff)
{
struct sk_buff *skb = *skbp;
+ const unsigned char *nh = skb_network_header(skb);
u32 pkt_len;
- if (skb->nh.raw[optoff+1] != 4 || (optoff&3) != 2) {
+ if (nh[optoff + 1] != 4 || (optoff & 3) != 2) {
LIMIT_NETDEBUG(KERN_DEBUG "ipv6_hop_jumbo: wrong jumbo opt length/alignment %d\n",
- skb->nh.raw[optoff+1]);
+ nh[optoff+1]);
IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
IPSTATS_MIB_INHDRERRORS);
goto drop;
}
- pkt_len = ntohl(*(__be32*)(skb->nh.raw+optoff+2));
+ pkt_len = ntohl(*(__be32 *)(nh + optoff + 2));
if (pkt_len <= IPV6_MAXPLEN) {
IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), IPSTATS_MIB_INHDRERRORS);
icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, optoff+2);
@@ -727,7 +737,7 @@ int ipv6_parse_hopopts(struct sk_buff **skbp)
struct inet6_skb_parm *opt = IP6CB(skb);
/*
- * skb->nh.raw is equal to skb->data, and
+ * skb_network_header(skb) is equal to skb->data, and
* skb->h.raw - skb->nh.raw is always equal to
* sizeof(struct ipv6hdr) by definition of
* hop-by-hop options.
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-26 19:59:07 +0000