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Diffstat (limited to 'net/ipv6/exthdrs.c')
-rw-r--r--net/ipv6/exthdrs.c64
1 files changed, 19 insertions, 45 deletions
diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index c82d4d49f71..1e89efd38a0 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -102,7 +102,7 @@ EXPORT_SYMBOL_GPL(ipv6_find_tlv);
struct tlvtype_proc {
int type;
- int (*func)(struct sk_buff **skbp, int offset);
+ int (*func)(struct sk_buff *skb, int offset);
};
/*********************
@@ -111,10 +111,8 @@ struct tlvtype_proc {
/* An unknown option is detected, decide what to do */
-static int ip6_tlvopt_unknown(struct sk_buff **skbp, int optoff)
+static int ip6_tlvopt_unknown(struct sk_buff *skb, int optoff)
{
- struct sk_buff *skb = *skbp;
-
switch ((skb_network_header(skb)[optoff] & 0xC0) >> 6) {
case 0: /* ignore */
return 1;
@@ -139,9 +137,8 @@ static int ip6_tlvopt_unknown(struct sk_buff **skbp, int optoff)
/* Parse tlv encoded option header (hop-by-hop or destination) */
-static int ip6_parse_tlv(struct tlvtype_proc *procs, struct sk_buff **skbp)
+static int ip6_parse_tlv(struct tlvtype_proc *procs, struct sk_buff *skb)
{
- struct sk_buff *skb = *skbp;
struct tlvtype_proc *curr;
const unsigned char *nh = skb_network_header(skb);
int off = skb_network_header_len(skb);
@@ -172,13 +169,13 @@ static int ip6_parse_tlv(struct tlvtype_proc *procs, struct sk_buff **skbp)
/* type specific length/alignment
checks will be performed in the
func(). */
- if (curr->func(skbp, off) == 0)
+ if (curr->func(skb, off) == 0)
return 0;
break;
}
}
if (curr->type < 0) {
- if (ip6_tlvopt_unknown(skbp, off) == 0)
+ if (ip6_tlvopt_unknown(skb, off) == 0)
return 0;
}
break;
@@ -198,9 +195,8 @@ bad:
*****************************/
#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
-static int ipv6_dest_hao(struct sk_buff **skbp, int optoff)
+static int ipv6_dest_hao(struct sk_buff *skb, int optoff)
{
- struct sk_buff *skb = *skbp;
struct ipv6_destopt_hao *hao;
struct inet6_skb_parm *opt = IP6CB(skb);
struct ipv6hdr *ipv6h = ipv6_hdr(skb);
@@ -234,22 +230,13 @@ static int ipv6_dest_hao(struct sk_buff **skbp, int optoff)
goto discard;
if (skb_cloned(skb)) {
- struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
- struct inet6_skb_parm *opt2;
-
- if (skb2 == NULL)
+ if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
goto discard;
- opt2 = IP6CB(skb2);
- memcpy(opt2, opt, sizeof(*opt2));
-
- kfree_skb(skb);
-
/* update all variable using below by copied skbuff */
- *skbp = skb = skb2;
- hao = (struct ipv6_destopt_hao *)(skb_network_header(skb2) +
+ hao = (struct ipv6_destopt_hao *)(skb_network_header(skb) +
optoff);
- ipv6h = ipv6_hdr(skb2);
+ ipv6h = ipv6_hdr(skb);
}
if (skb->ip_summed == CHECKSUM_COMPLETE)
@@ -280,9 +267,8 @@ static struct tlvtype_proc tlvprocdestopt_lst[] = {
{-1, NULL}
};
-static int ipv6_destopt_rcv(struct sk_buff **skbp)
+static int ipv6_destopt_rcv(struct sk_buff *skb)
{
- struct sk_buff *skb = *skbp;
struct inet6_skb_parm *opt = IP6CB(skb);
#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
__u16 dstbuf;
@@ -304,9 +290,8 @@ static int ipv6_destopt_rcv(struct sk_buff **skbp)
#endif
dst = dst_clone(skb->dst);
- if (ip6_parse_tlv(tlvprocdestopt_lst, skbp)) {
+ if (ip6_parse_tlv(tlvprocdestopt_lst, skb)) {
dst_release(dst);
- skb = *skbp;
skb->transport_header += (skb_transport_header(skb)[1] + 1) << 3;
opt = IP6CB(skb);
#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
@@ -337,10 +322,8 @@ void __init ipv6_destopt_init(void)
NONE header. No data in packet.
********************************/
-static int ipv6_nodata_rcv(struct sk_buff **skbp)
+static int ipv6_nodata_rcv(struct sk_buff *skb)
{
- struct sk_buff *skb = *skbp;
-
kfree_skb(skb);
return 0;
}
@@ -360,9 +343,8 @@ void __init ipv6_nodata_init(void)
Routing header.
********************************/
-static int ipv6_rthdr_rcv(struct sk_buff **skbp)
+static int ipv6_rthdr_rcv(struct sk_buff *skb)
{
- struct sk_buff *skb = *skbp;
struct inet6_skb_parm *opt = IP6CB(skb);
struct in6_addr *addr = NULL;
struct in6_addr daddr;
@@ -464,18 +446,14 @@ looped_back:
Do not damage packets queued somewhere.
*/
if (skb_cloned(skb)) {
- struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
/* the copy is a forwarded packet */
- if (skb2 == NULL) {
+ if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC)) {
IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
IPSTATS_MIB_OUTDISCARDS);
kfree_skb(skb);
return -1;
}
- kfree_skb(skb);
- *skbp = skb = skb2;
- opt = IP6CB(skb2);
- hdr = (struct ipv6_rt_hdr *)skb_transport_header(skb2);
+ hdr = (struct ipv6_rt_hdr *)skb_transport_header(skb);
}
if (skb->ip_summed == CHECKSUM_COMPLETE)
@@ -578,9 +556,8 @@ static inline struct inet6_dev *ipv6_skb_idev(struct sk_buff *skb)
/* Router Alert as of RFC 2711 */
-static int ipv6_hop_ra(struct sk_buff **skbp, int optoff)
+static int ipv6_hop_ra(struct sk_buff *skb, int optoff)
{
- struct sk_buff *skb = *skbp;
const unsigned char *nh = skb_network_header(skb);
if (nh[optoff + 1] == 2) {
@@ -595,9 +572,8 @@ static int ipv6_hop_ra(struct sk_buff **skbp, int optoff)
/* Jumbo payload */
-static int ipv6_hop_jumbo(struct sk_buff **skbp, int optoff)
+static int ipv6_hop_jumbo(struct sk_buff *skb, int optoff)
{
- struct sk_buff *skb = *skbp;
const unsigned char *nh = skb_network_header(skb);
u32 pkt_len;
@@ -648,9 +624,8 @@ static struct tlvtype_proc tlvprochopopt_lst[] = {
{ -1, }
};
-int ipv6_parse_hopopts(struct sk_buff **skbp)
+int ipv6_parse_hopopts(struct sk_buff *skb)
{
- struct sk_buff *skb = *skbp;
struct inet6_skb_parm *opt = IP6CB(skb);
/*
@@ -667,8 +642,7 @@ int ipv6_parse_hopopts(struct sk_buff **skbp)
}
opt->hop = sizeof(struct ipv6hdr);
- if (ip6_parse_tlv(tlvprochopopt_lst, skbp)) {
- skb = *skbp;
+ if (ip6_parse_tlv(tlvprochopopt_lst, skb)) {
skb->transport_header += (skb_transport_header(skb)[1] + 1) << 3;
opt = IP6CB(skb);
opt->nhoff = sizeof(struct ipv6hdr);
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-12 04:18:07 +0000