*
* The options processing module for ip.c
*
- * Version: $Id: ip_options.c,v 1.21 2001/09/01 00:31:50 davem Exp $
- *
* Authors: A.N.Kuznetsov
- *
+ *
*/
#include <linux/capability.h>
#include <net/route.h>
#include <net/cipso_ipv4.h>
-/*
+/*
* Write options to IP header, record destination address to
* source route option, address of outgoing interface
* (we should already know it, so that this function is allowed be
void ip_options_build(struct sk_buff * skb, struct ip_options * opt,
__be32 daddr, struct rtable *rt, int is_frag)
{
- unsigned char * iph = skb->nh.raw;
+ unsigned char *iph = skb_network_header(skb);
memcpy(&(IPCB(skb)->opt), opt, sizeof(struct ip_options));
memcpy(iph+sizeof(struct iphdr), opt->__data, opt->optlen);
opt = &(IPCB(skb)->opt);
- opt->is_data = 0;
if (opt->srr)
memcpy(iph+opt->srr+iph[opt->srr+1]-4, &daddr, 4);
if (opt->ts_needaddr)
ip_rt_get_source(iph+opt->ts+iph[opt->ts+2]-9, rt);
if (opt->ts_needtime) {
- struct timeval tv;
+ struct timespec tv;
__be32 midtime;
- do_gettimeofday(&tv);
- midtime = htonl((tv.tv_sec % 86400) * 1000 + tv.tv_usec / 1000);
+ getnstimeofday(&tv);
+ midtime = htonl((tv.tv_sec % 86400) * MSEC_PER_SEC + tv.tv_nsec / NSEC_PER_MSEC);
memcpy(iph+opt->ts+iph[opt->ts+2]-5, &midtime, 4);
}
return;
}
}
-/*
+/*
* Provided (sopt, skb) points to received options,
* build in dopt compiled option set appropriate for answering.
* i.e. invert SRR option, copy anothers,
* 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;
unsigned char *sptr, *dptr;
memset(dopt, 0, sizeof(struct ip_options));
- dopt->is_data = 1;
-
sopt = &(IPCB(skb)->opt);
if (sopt->optlen == 0) {
return 0;
}
- sptr = skb->nh.raw;
+ sptr = skb_network_header(skb);
dptr = dopt->__data;
- if (skb->dst)
- daddr = ((struct rtable*)skb->dst)->rt_spec_dst;
- else
- daddr = skb->nh.iph->daddr;
+ daddr = skb_rtable(skb)->rt_spec_dst;
if (sopt->rr) {
optlen = sptr[sopt->rr+1];
__be32 addr;
memcpy(&addr, sptr+soffset-1, 4);
- if (inet_addr_type(addr) != RTN_LOCAL) {
+ if (inet_addr_type(dev_net(skb_dst(skb)->dev), addr) != RTN_LOCAL) {
dopt->ts_needtime = 1;
soffset += 8;
}
/*
* RFC1812 requires to fix illegal source routes.
*/
- if (memcmp(&skb->nh.iph->saddr, &start[soffset+3], 4) == 0)
+ if (memcmp(&ip_hdr(skb)->saddr,
+ &start[soffset + 3], 4) == 0)
doffset -= 4;
}
if (doffset > 3) {
* Simple and stupid 8), but the most efficient way.
*/
-void ip_options_fragment(struct sk_buff * skb)
+void ip_options_fragment(struct sk_buff * skb)
{
- unsigned char * optptr = skb->nh.raw + sizeof(struct iphdr);
+ unsigned char *optptr = skb_network_header(skb) + sizeof(struct iphdr);
struct ip_options * opt = &(IPCB(skb)->opt);
int l = opt->optlen;
int optlen;
* If opt == NULL, then skb->data should point to IP header.
*/
-int ip_options_compile(struct ip_options * opt, struct sk_buff * skb)
+int ip_options_compile(struct net *net,
+ struct ip_options * opt, struct sk_buff * skb)
{
int l;
unsigned char * iph;
unsigned char * optptr;
int optlen;
unsigned char * pp_ptr = NULL;
- struct rtable *rt = skb ? (struct rtable*)skb->dst : NULL;
-
- if (!opt) {
- opt = &(IPCB(skb)->opt);
- iph = skb->nh.raw;
- opt->optlen = ((struct iphdr *)iph)->ihl*4 - sizeof(struct iphdr);
- optptr = iph + sizeof(struct iphdr);
- opt->is_data = 0;
- } else {
- optptr = opt->is_data ? opt->__data : (unsigned char*)&(skb->nh.iph[1]);
- iph = optptr - sizeof(struct iphdr);
- }
+ struct rtable *rt = NULL;
+
+ if (skb != NULL) {
+ rt = skb_rtable(skb);
+ optptr = (unsigned char *)&(ip_hdr(skb)[1]);
+ } else
+ optptr = opt->__data;
+ iph = optptr - sizeof(struct iphdr);
for (l = opt->optlen; l > 0; ) {
switch (*optptr) {
switch (optptr[3]&0xF) {
case IPOPT_TS_TSONLY:
opt->ts = optptr - iph;
- if (skb)
+ if (skb)
timeptr = (__be32*)&optptr[optptr[2]-1];
opt->ts_needtime = 1;
optptr[2] += 4;
{
__be32 addr;
memcpy(&addr, &optptr[optptr[2]-1], 4);
- if (inet_addr_type(addr) == RTN_UNICAST)
+ if (inet_addr_type(net, addr) == RTN_UNICAST)
break;
if (skb)
timeptr = (__be32*)&optptr[optptr[2]+3];
break;
}
if (timeptr) {
- struct timeval tv;
+ struct timespec tv;
__be32 midtime;
- do_gettimeofday(&tv);
- midtime = htonl((tv.tv_sec % 86400) * 1000 + tv.tv_usec / 1000);
+ getnstimeofday(&tv);
+ midtime = htonl((tv.tv_sec % 86400) * MSEC_PER_SEC + tv.tv_nsec / NSEC_PER_MSEC);
memcpy(timeptr, &midtime, sizeof(__be32));
opt->is_changed = 1;
}
goto error;
}
opt->cipso = optptr - iph;
- if (cipso_v4_validate(&optptr)) {
+ if (cipso_v4_validate(skb, &optptr)) {
pp_ptr = optptr;
goto error;
}
static struct ip_options *ip_options_get_alloc(const int optlen)
{
- struct ip_options *opt = kmalloc(sizeof(*opt) + ((optlen + 3) & ~3),
- GFP_KERNEL);
- if (opt)
- memset(opt, 0, sizeof(*opt));
- return opt;
+ return kzalloc(sizeof(struct ip_options) + ((optlen + 3) & ~3),
+ GFP_KERNEL);
}
-static int ip_options_get_finish(struct ip_options **optp,
+static int ip_options_get_finish(struct net *net, struct ip_options **optp,
struct ip_options *opt, int optlen)
{
while (optlen & 3)
opt->__data[optlen++] = IPOPT_END;
opt->optlen = optlen;
- opt->is_data = 1;
- if (optlen && ip_options_compile(opt, NULL)) {
+ if (optlen && ip_options_compile(net, opt, NULL)) {
kfree(opt);
return -EINVAL;
}
return 0;
}
-int ip_options_get_from_user(struct ip_options **optp, unsigned char __user *data, int optlen)
+int ip_options_get_from_user(struct net *net, struct ip_options **optp,
+ unsigned char __user *data, int optlen)
{
struct ip_options *opt = ip_options_get_alloc(optlen);
kfree(opt);
return -EFAULT;
}
- return ip_options_get_finish(optp, opt, optlen);
+ return ip_options_get_finish(net, optp, opt, optlen);
}
-int ip_options_get(struct ip_options **optp, unsigned char *data, int optlen)
+int ip_options_get(struct net *net, struct ip_options **optp,
+ unsigned char *data, int optlen)
{
struct ip_options *opt = ip_options_get_alloc(optlen);
return -ENOMEM;
if (optlen)
memcpy(opt->__data, data, optlen);
- return ip_options_get_finish(optp, opt, optlen);
+ return ip_options_get_finish(net, optp, opt, optlen);
}
void ip_forward_options(struct sk_buff *skb)
{
struct ip_options * opt = &(IPCB(skb)->opt);
unsigned char * optptr;
- struct rtable *rt = (struct rtable*)skb->dst;
- unsigned char *raw = skb->nh.raw;
+ struct rtable *rt = skb_rtable(skb);
+ unsigned char *raw = skb_network_header(skb);
if (opt->rr_needaddr) {
optptr = (unsigned char *)raw + opt->rr;
if (srrptr + 3 <= srrspace) {
opt->is_changed = 1;
ip_rt_get_source(&optptr[srrptr-1], rt);
- skb->nh.iph->daddr = rt->rt_dst;
+ ip_hdr(skb)->daddr = rt->rt_dst;
optptr[2] = srrptr+4;
} else if (net_ratelimit())
printk(KERN_CRIT "ip_forward(): Argh! Destination lost!\n");
}
if (opt->is_changed) {
opt->is_changed = 0;
- ip_send_check(skb->nh.iph);
+ ip_send_check(ip_hdr(skb));
}
}
struct ip_options *opt = &(IPCB(skb)->opt);
int srrspace, srrptr;
__be32 nexthop;
- struct iphdr *iph = skb->nh.iph;
- unsigned char * optptr = skb->nh.raw + opt->srr;
- struct rtable *rt = (struct rtable*)skb->dst;
+ struct iphdr *iph = ip_hdr(skb);
+ unsigned char *optptr = skb_network_header(skb) + opt->srr;
+ struct rtable *rt = skb_rtable(skb);
struct rtable *rt2;
int err;
}
memcpy(&nexthop, &optptr[srrptr-1], 4);
- rt = (struct rtable*)skb->dst;
- skb->dst = NULL;
+ rt = skb_rtable(skb);
+ skb_dst_set(skb, NULL);
err = ip_route_input(skb, nexthop, iph->saddr, iph->tos, skb->dev);
- rt2 = (struct rtable*)skb->dst;
+ rt2 = skb_rtable(skb);
if (err || (rt2->rt_type != RTN_UNICAST && rt2->rt_type != RTN_LOCAL)) {
ip_rt_put(rt2);
- skb->dst = &rt->u.dst;
+ skb_dst_set(skb, &rt->u.dst);
return -EINVAL;
}
ip_rt_put(rt);
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