* 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/ip.h>
#include <net/icmp.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,
- u32 daddr, struct rtable *rt, int is_frag)
+ __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);
ip_rt_get_source(iph+opt->ts+iph[opt->ts+2]-9, rt);
if (opt->ts_needtime) {
struct timeval tv;
- __u32 midtime;
+ __be32 midtime;
do_gettimeofday(&tv);
midtime = htonl((tv.tv_sec % 86400) * 1000 + tv.tv_usec / 1000);
memcpy(iph+opt->ts+iph[opt->ts+2]-5, &midtime, 4);
}
}
-/*
+/*
* 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;
int soffset, doffset;
int optlen;
- u32 daddr;
+ __be32 daddr;
memset(dopt, 0, sizeof(struct ip_options));
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 = ip_hdr(skb)->daddr;
if (sopt->rr) {
optlen = sptr[sopt->rr+1];
dopt->ts_needtime = 0;
if (soffset + 8 <= optlen) {
- __u32 addr;
+ __be32 addr;
memcpy(&addr, sptr+soffset-1, 4);
if (inet_addr_type(addr) != RTN_LOCAL) {
}
if (sopt->srr) {
unsigned char * start = sptr+sopt->srr;
- u32 faddr;
+ __be32 faddr;
optlen = start[1];
soffset = start[2];
/*
* 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) {
dopt->is_strictroute = sopt->is_strictroute;
}
}
+ if (sopt->cipso) {
+ optlen = sptr[sopt->cipso+1];
+ dopt->cipso = dopt->optlen+sizeof(struct iphdr);
+ memcpy(dptr, sptr+sopt->cipso, optlen);
+ dptr += optlen;
+ dopt->optlen += optlen;
+ }
while (dopt->optlen & 3) {
*dptr++ = IPOPT_END;
dopt->optlen++;
* 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) {
opt = &(IPCB(skb)->opt);
- iph = skb->nh.raw;
+ iph = skb_network_header(skb);
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]);
+ optptr = opt->is_data ? opt->__data :
+ (unsigned char *)&(ip_hdr(skb)[1]);
iph = optptr - sizeof(struct iphdr);
}
goto error;
}
if (optptr[2] <= optlen) {
- __u32 * timeptr = NULL;
+ __be32 *timeptr = NULL;
if (optptr[2]+3 > optptr[1]) {
pp_ptr = optptr + 2;
goto error;
switch (optptr[3]&0xF) {
case IPOPT_TS_TSONLY:
opt->ts = optptr - iph;
- if (skb)
- timeptr = (__u32*)&optptr[optptr[2]-1];
+ if (skb)
+ timeptr = (__be32*)&optptr[optptr[2]-1];
opt->ts_needtime = 1;
optptr[2] += 4;
break;
opt->ts = optptr - iph;
if (skb) {
memcpy(&optptr[optptr[2]-1], &rt->rt_spec_dst, 4);
- timeptr = (__u32*)&optptr[optptr[2]+3];
+ timeptr = (__be32*)&optptr[optptr[2]+3];
}
opt->ts_needaddr = 1;
opt->ts_needtime = 1;
}
opt->ts = optptr - iph;
{
- u32 addr;
+ __be32 addr;
memcpy(&addr, &optptr[optptr[2]-1], 4);
if (inet_addr_type(addr) == RTN_UNICAST)
break;
if (skb)
- timeptr = (__u32*)&optptr[optptr[2]+3];
+ timeptr = (__be32*)&optptr[optptr[2]+3];
}
opt->ts_needtime = 1;
optptr[2] += 8;
}
if (timeptr) {
struct timeval tv;
- __u32 midtime;
+ __be32 midtime;
do_gettimeofday(&tv);
midtime = htonl((tv.tv_sec % 86400) * 1000 + tv.tv_usec / 1000);
- memcpy(timeptr, &midtime, sizeof(__u32));
+ memcpy(timeptr, &midtime, sizeof(__be32));
opt->is_changed = 1;
}
} else {
if (optptr[2] == 0 && optptr[3] == 0)
opt->router_alert = optptr - iph;
break;
+ case IPOPT_CIPSO:
+ if ((!skb && !capable(CAP_NET_RAW)) || opt->cipso) {
+ pp_ptr = optptr;
+ goto error;
+ }
+ opt->cipso = optptr - iph;
+ if (cipso_v4_validate(&optptr)) {
+ pp_ptr = optptr;
+ goto error;
+ }
+ break;
case IPOPT_SEC:
case IPOPT_SID:
default:
opt->__data[optlen++] = IPOPT_END;
opt->optlen = optlen;
opt->is_data = 1;
- opt->is_setbyuser = 1;
if (optlen && ip_options_compile(opt, NULL)) {
kfree(opt);
return -EINVAL;
struct ip_options * opt = &(IPCB(skb)->opt);
unsigned char * optptr;
struct rtable *rt = (struct rtable*)skb->dst;
- unsigned char *raw = skb->nh.raw;
+ 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;
- u32 nexthop;
- struct iphdr *iph = skb->nh.iph;
- unsigned char * optptr = skb->nh.raw + opt->srr;
+ __be32 nexthop;
+ struct iphdr *iph = ip_hdr(skb);
+ unsigned char *optptr = skb_network_header(skb) + opt->srr;
struct rtable *rt = (struct rtable*)skb->dst;
struct rtable *rt2;
int err;
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