#include <linux/in6.h>
#include <linux/icmpv6.h>
+#include <net/dst.h>
#include <net/sock.h>
#include <net/snmp.h>
struct tlvtype_proc {
int type;
- int (*func)(struct sk_buff **skbp, int offset);
+ int (*func)(struct sk_buff *skb, int offset);
};
/*********************
/* 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;
/* 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);
/* 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;
*****************************/
#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);
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)
{-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;
#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)
return -1;
}
-static struct inet6_protocol destopt_protocol = {
- .handler = ipv6_destopt_rcv,
- .flags = INET6_PROTO_NOPOLICY | INET6_PROTO_GSO_EXTHDR,
-};
-
-void __init ipv6_destopt_init(void)
-{
- if (inet6_add_protocol(&destopt_protocol, IPPROTO_DSTOPTS) < 0)
- printk(KERN_ERR "ipv6_destopt_init: Could not register protocol\n");
-}
-
-/********************************
- NONE header. No data in packet.
- ********************************/
-
-static int ipv6_nodata_rcv(struct sk_buff **skbp)
-{
- struct sk_buff *skb = *skbp;
-
- kfree_skb(skb);
- return 0;
-}
-
-static struct inet6_protocol nodata_protocol = {
- .handler = ipv6_nodata_rcv,
- .flags = INET6_PROTO_NOPOLICY,
-};
-
-void __init ipv6_nodata_init(void)
-{
- if (inet6_add_protocol(&nodata_protocol, IPPROTO_NONE) < 0)
- printk(KERN_ERR "ipv6_nodata_init: Could not register protocol\n");
-}
-
/********************************
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;
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)
kfree_skb(skb);
return -1;
}
- if (!ipv6_chk_home_addr(addr)) {
+ if (!ipv6_chk_home_addr(&init_net, addr)) {
IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
IPSTATS_MIB_INADDRERRORS);
kfree_skb(skb);
.flags = INET6_PROTO_NOPOLICY | INET6_PROTO_GSO_EXTHDR,
};
-void __init ipv6_rthdr_init(void)
+static struct inet6_protocol destopt_protocol = {
+ .handler = ipv6_destopt_rcv,
+ .flags = INET6_PROTO_NOPOLICY | INET6_PROTO_GSO_EXTHDR,
+};
+
+static struct inet6_protocol nodata_protocol = {
+ .handler = dst_discard,
+ .flags = INET6_PROTO_NOPOLICY,
+};
+
+int __init ipv6_exthdrs_init(void)
{
- if (inet6_add_protocol(&rthdr_protocol, IPPROTO_ROUTING) < 0)
- printk(KERN_ERR "ipv6_rthdr_init: Could not register protocol\n");
+ int ret;
+
+ ret = inet6_add_protocol(&rthdr_protocol, IPPROTO_ROUTING);
+ if (ret)
+ goto out;
+
+ ret = inet6_add_protocol(&destopt_protocol, IPPROTO_DSTOPTS);
+ if (ret)
+ goto out_rthdr;
+
+ ret = inet6_add_protocol(&nodata_protocol, IPPROTO_NONE);
+ if (ret)
+ goto out_destopt;
+
+out:
+ return ret;
+out_rthdr:
+ inet6_del_protocol(&rthdr_protocol, IPPROTO_ROUTING);
+out_destopt:
+ inet6_del_protocol(&destopt_protocol, IPPROTO_DSTOPTS);
+ goto out;
};
+void ipv6_exthdrs_exit(void)
+{
+ inet6_del_protocol(&nodata_protocol, IPPROTO_NONE);
+ inet6_del_protocol(&destopt_protocol, IPPROTO_DSTOPTS);
+ inet6_del_protocol(&rthdr_protocol, IPPROTO_ROUTING);
+}
+
/**********************************
Hop-by-hop options.
**********************************/
/* 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) {
/* 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;
{ -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);
/*
}
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);