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Diffstat (limited to 'net/ipv4/ip_options.c')
-rw-r--r--net/ipv4/ip_options.c57
1 files changed, 27 insertions, 30 deletions
diff --git a/net/ipv4/ip_options.c b/net/ipv4/ip_options.c
index 2391b24e8251..c3118e1cd3bb 100644
--- a/net/ipv4/ip_options.c
+++ b/net/ipv4/ip_options.c
@@ -36,8 +36,8 @@
* saddr is address of outgoing interface.
*/
-void ip_options_build(struct sk_buff * skb, struct ip_options * opt,
- __be32 daddr, struct rtable *rt, int is_frag)
+void ip_options_build(struct sk_buff *skb, struct ip_options *opt,
+ __be32 daddr, struct rtable *rt, int is_frag)
{
unsigned char *iph = skb_network_header(skb);
@@ -50,9 +50,9 @@ void ip_options_build(struct sk_buff * skb, struct ip_options * opt,
if (!is_frag) {
if (opt->rr_needaddr)
- ip_rt_get_source(iph+opt->rr+iph[opt->rr+2]-5, rt);
+ ip_rt_get_source(iph+opt->rr+iph[opt->rr+2]-5, skb, rt);
if (opt->ts_needaddr)
- ip_rt_get_source(iph+opt->ts+iph[opt->ts+2]-9, rt);
+ ip_rt_get_source(iph+opt->ts+iph[opt->ts+2]-9, skb, rt);
if (opt->ts_needtime) {
struct timespec tv;
__be32 midtime;
@@ -83,9 +83,9 @@ void ip_options_build(struct sk_buff * skb, struct ip_options * opt,
* NOTE: dopt cannot point to skb.
*/
-int ip_options_echo(struct ip_options * dopt, struct sk_buff * skb)
+int ip_options_echo(struct ip_options *dopt, struct sk_buff *skb)
{
- struct ip_options *sopt;
+ const struct ip_options *sopt;
unsigned char *sptr, *dptr;
int soffset, doffset;
int optlen;
@@ -95,10 +95,8 @@ int ip_options_echo(struct ip_options * dopt, struct sk_buff * skb)
sopt = &(IPCB(skb)->opt);
- if (sopt->optlen == 0) {
- dopt->optlen = 0;
+ if (sopt->optlen == 0)
return 0;
- }
sptr = skb_network_header(skb);
dptr = dopt->__data;
@@ -157,7 +155,7 @@ int ip_options_echo(struct ip_options * dopt, struct sk_buff * skb)
dopt->optlen += optlen;
}
if (sopt->srr) {
- unsigned char * start = sptr+sopt->srr;
+ unsigned char *start = sptr+sopt->srr;
__be32 faddr;
optlen = start[1];
@@ -499,19 +497,19 @@ void ip_options_undo(struct ip_options * opt)
}
}
-static struct ip_options *ip_options_get_alloc(const int optlen)
+static struct ip_options_rcu *ip_options_get_alloc(const int optlen)
{
- return kzalloc(sizeof(struct ip_options) + ((optlen + 3) & ~3),
+ return kzalloc(sizeof(struct ip_options_rcu) + ((optlen + 3) & ~3),
GFP_KERNEL);
}
-static int ip_options_get_finish(struct net *net, struct ip_options **optp,
- struct ip_options *opt, int optlen)
+static int ip_options_get_finish(struct net *net, struct ip_options_rcu **optp,
+ struct ip_options_rcu *opt, int optlen)
{
while (optlen & 3)
- opt->__data[optlen++] = IPOPT_END;
- opt->optlen = optlen;
- if (optlen && ip_options_compile(net, opt, NULL)) {
+ opt->opt.__data[optlen++] = IPOPT_END;
+ opt->opt.optlen = optlen;
+ if (optlen && ip_options_compile(net, &opt->opt, NULL)) {
kfree(opt);
return -EINVAL;
}
@@ -520,29 +518,29 @@ static int ip_options_get_finish(struct net *net, struct ip_options **optp,
return 0;
}
-int ip_options_get_from_user(struct net *net, struct ip_options **optp,
+int ip_options_get_from_user(struct net *net, struct ip_options_rcu **optp,
unsigned char __user *data, int optlen)
{
- struct ip_options *opt = ip_options_get_alloc(optlen);
+ struct ip_options_rcu *opt = ip_options_get_alloc(optlen);
if (!opt)
return -ENOMEM;
- if (optlen && copy_from_user(opt->__data, data, optlen)) {
+ if (optlen && copy_from_user(opt->opt.__data, data, optlen)) {
kfree(opt);
return -EFAULT;
}
return ip_options_get_finish(net, optp, opt, optlen);
}
-int ip_options_get(struct net *net, struct ip_options **optp,
+int ip_options_get(struct net *net, struct ip_options_rcu **optp,
unsigned char *data, int optlen)
{
- struct ip_options *opt = ip_options_get_alloc(optlen);
+ struct ip_options_rcu *opt = ip_options_get_alloc(optlen);
if (!opt)
return -ENOMEM;
if (optlen)
- memcpy(opt->__data, data, optlen);
+ memcpy(opt->opt.__data, data, optlen);
return ip_options_get_finish(net, optp, opt, optlen);
}
@@ -555,7 +553,7 @@ void ip_forward_options(struct sk_buff *skb)
if (opt->rr_needaddr) {
optptr = (unsigned char *)raw + opt->rr;
- ip_rt_get_source(&optptr[optptr[2]-5], rt);
+ ip_rt_get_source(&optptr[optptr[2]-5], skb, rt);
opt->is_changed = 1;
}
if (opt->srr_is_hit) {
@@ -569,19 +567,18 @@ void ip_forward_options(struct sk_buff *skb)
) {
if (srrptr + 3 > srrspace)
break;
- if (memcmp(&rt->rt_dst, &optptr[srrptr-1], 4) == 0)
+ if (memcmp(&ip_hdr(skb)->daddr, &optptr[srrptr-1], 4) == 0)
break;
}
if (srrptr + 3 <= srrspace) {
opt->is_changed = 1;
- ip_rt_get_source(&optptr[srrptr-1], rt);
- ip_hdr(skb)->daddr = rt->rt_dst;
+ ip_rt_get_source(&optptr[srrptr-1], skb, rt);
optptr[2] = srrptr+4;
} else if (net_ratelimit())
printk(KERN_CRIT "ip_forward(): Argh! Destination lost!\n");
if (opt->ts_needaddr) {
optptr = raw + opt->ts;
- ip_rt_get_source(&optptr[optptr[2]-9], rt);
+ ip_rt_get_source(&optptr[optptr[2]-9], skb, rt);
opt->is_changed = 1;
}
}
@@ -603,7 +600,7 @@ int ip_options_rcv_srr(struct sk_buff *skb)
unsigned long orefdst;
int err;
- if (!opt->srr || !rt)
+ if (!rt)
return 0;
if (skb->pkt_type != PACKET_HOST)
@@ -637,7 +634,7 @@ int ip_options_rcv_srr(struct sk_buff *skb)
if (rt2->rt_type != RTN_LOCAL)
break;
/* Superfast 8) loopback forward */
- memcpy(&iph->daddr, &optptr[srrptr-1], 4);
+ iph->daddr = nexthop;
opt->is_changed = 1;
}
if (srrptr <= srrspace) {
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.