{-1, NULL}
};
-static int ipv6_destopt_rcv(struct sk_buff **skbp, unsigned int *nhoffp)
+static int ipv6_destopt_rcv(struct sk_buff **skbp)
{
struct sk_buff *skb = *skbp;
- struct inet6_skb_parm *opt = (struct inet6_skb_parm *)skb->cb;
+ struct inet6_skb_parm *opt = IP6CB(skb);
if (!pskb_may_pull(skb, (skb->h.raw-skb->data)+8) ||
!pskb_may_pull(skb, (skb->h.raw-skb->data)+((skb->h.raw[1]+1)<<3))) {
- IP6_INC_STATS_BH(Ip6InHdrErrors);
+ IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
kfree_skb(skb);
return -1;
}
+ opt->lastopt = skb->h.raw - skb->nh.raw;
opt->dst1 = skb->h.raw - skb->nh.raw;
if (ip6_parse_tlv(tlvprocdestopt_lst, skb)) {
skb->h.raw += ((skb->h.raw[1]+1)<<3);
- *nhoffp = opt->dst1;
+ opt->nhoff = opt->dst1;
return 1;
}
- IP6_INC_STATS_BH(Ip6InHdrErrors);
+ IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
return -1;
}
NONE header. No data in packet.
********************************/
-static int ipv6_nodata_rcv(struct sk_buff **skbp, unsigned int *nhoffp)
+static int ipv6_nodata_rcv(struct sk_buff **skbp)
{
struct sk_buff *skb = *skbp;
Routing header.
********************************/
-static int ipv6_rthdr_rcv(struct sk_buff **skbp, unsigned int *nhoffp)
+static int ipv6_rthdr_rcv(struct sk_buff **skbp)
{
struct sk_buff *skb = *skbp;
- struct inet6_skb_parm *opt = (struct inet6_skb_parm *)skb->cb;
+ struct inet6_skb_parm *opt = IP6CB(skb);
struct in6_addr *addr;
struct in6_addr daddr;
int n, i;
if (!pskb_may_pull(skb, (skb->h.raw-skb->data)+8) ||
!pskb_may_pull(skb, (skb->h.raw-skb->data)+((skb->h.raw[1]+1)<<3))) {
- IP6_INC_STATS_BH(Ip6InHdrErrors);
+ IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
kfree_skb(skb);
return -1;
}
if (ipv6_addr_is_multicast(&skb->nh.ipv6h->daddr) ||
skb->pkt_type != PACKET_HOST) {
- IP6_INC_STATS_BH(Ip6InAddrErrors);
+ IP6_INC_STATS_BH(IPSTATS_MIB_INADDRERRORS);
kfree_skb(skb);
return -1;
}
looped_back:
if (hdr->segments_left == 0) {
+ opt->lastopt = skb->h.raw - skb->nh.raw;
opt->srcrt = skb->h.raw - skb->nh.raw;
skb->h.raw += (hdr->hdrlen + 1) << 3;
opt->dst0 = opt->dst1;
opt->dst1 = 0;
- *nhoffp = (&hdr->nexthdr) - skb->nh.raw;
+ opt->nhoff = (&hdr->nexthdr) - skb->nh.raw;
return 1;
}
if (hdr->type != IPV6_SRCRT_TYPE_0) {
- IP6_INC_STATS_BH(Ip6InHdrErrors);
+ IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, (&hdr->type) - skb->nh.raw);
return -1;
}
if (hdr->hdrlen & 0x01) {
- IP6_INC_STATS_BH(Ip6InHdrErrors);
+ IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, (&hdr->hdrlen) - skb->nh.raw);
return -1;
}
n = hdr->hdrlen >> 1;
if (hdr->segments_left > n) {
- IP6_INC_STATS_BH(Ip6InHdrErrors);
+ IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, (&hdr->segments_left) - skb->nh.raw);
return -1;
}
kfree_skb(skb);
/* the copy is a forwarded packet */
if (skb2 == NULL) {
- IP6_INC_STATS_BH(Ip6OutDiscards);
+ IP6_INC_STATS_BH(IPSTATS_MIB_OUTDISCARDS);
return -1;
}
*skbp = skb = skb2;
- opt = (struct inet6_skb_parm *)skb2->cb;
+ opt = IP6CB(skb2);
hdr = (struct ipv6_rt_hdr *) skb2->h.raw;
}
addr += i - 1;
if (ipv6_addr_is_multicast(addr)) {
- IP6_INC_STATS_BH(Ip6InAddrErrors);
+ IP6_INC_STATS_BH(IPSTATS_MIB_INADDRERRORS);
kfree_skb(skb);
return -1;
}
dst_release(xchg(&skb->dst, NULL));
ip6_route_input(skb);
if (skb->dst->error) {
+ skb_push(skb, skb->data - skb->nh.raw);
dst_input(skb);
return -1;
}
+
if (skb->dst->dev->flags&IFF_LOOPBACK) {
if (skb->nh.ipv6h->hop_limit <= 1) {
- IP6_INC_STATS_BH(Ip6InHdrErrors);
+ IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
icmpv6_send(skb, ICMPV6_TIME_EXCEED, ICMPV6_EXC_HOPLIMIT,
0, skb->dev);
kfree_skb(skb);
goto looped_back;
}
+ skb_push(skb, skb->data - skb->nh.raw);
dst_input(skb);
return -1;
}
memcpy(opt->srcrt, hdr, sizeof(*hdr));
irthdr = (struct rt0_hdr*)opt->srcrt;
- /* Obsolete field, MBZ, when originated by us */
- irthdr->bitmap = 0;
+ irthdr->reserved = 0;
opt->srcrt->segments_left = n;
for (i=0; i<n; i++)
memcpy(irthdr->addr+i, rthdr->addr+(n-1-i), 16);
return opt;
}
+EXPORT_SYMBOL_GPL(ipv6_invert_rthdr);
+
/**********************************
Hop-by-hop options.
**********************************/
static int ipv6_hop_ra(struct sk_buff *skb, int optoff)
{
if (skb->nh.raw[optoff+1] == 2) {
- ((struct inet6_skb_parm*)skb->cb)->ra = optoff;
+ IP6CB(skb)->ra = optoff;
return 1;
}
- LIMIT_NETDEBUG(
- printk(KERN_DEBUG "ipv6_hop_ra: wrong RA length %d\n", skb->nh.raw[optoff+1]));
+ LIMIT_NETDEBUG(KERN_DEBUG "ipv6_hop_ra: wrong RA length %d\n",
+ skb->nh.raw[optoff+1]);
kfree_skb(skb);
return 0;
}
u32 pkt_len;
if (skb->nh.raw[optoff+1] != 4 || (optoff&3) != 2) {
- LIMIT_NETDEBUG(
- printk(KERN_DEBUG "ipv6_hop_jumbo: wrong jumbo opt length/alignment %d\n", skb->nh.raw[optoff+1]));
- IP6_INC_STATS_BH(Ip6InHdrErrors);
+ LIMIT_NETDEBUG(KERN_DEBUG "ipv6_hop_jumbo: wrong jumbo opt length/alignment %d\n",
+ skb->nh.raw[optoff+1]);
+ IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
goto drop;
}
pkt_len = ntohl(*(u32*)(skb->nh.raw+optoff+2));
if (pkt_len <= IPV6_MAXPLEN) {
- IP6_INC_STATS_BH(Ip6InHdrErrors);
+ IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, optoff+2);
return 0;
}
if (skb->nh.ipv6h->payload_len) {
- IP6_INC_STATS_BH(Ip6InHdrErrors);
+ IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, optoff);
return 0;
}
if (pkt_len > skb->len - sizeof(struct ipv6hdr)) {
- IP6_INC_STATS_BH(Ip6InTruncatedPkts);
+ IP6_INC_STATS_BH(IPSTATS_MIB_INTRUNCATEDPKTS);
goto drop;
}
- if (pkt_len + sizeof(struct ipv6hdr) < skb->len) {
- __pskb_trim(skb, pkt_len + sizeof(struct ipv6hdr));
- if (skb->ip_summed == CHECKSUM_HW)
- skb->ip_summed = CHECKSUM_NONE;
- }
+
+ if (pskb_trim_rcsum(skb, pkt_len + sizeof(struct ipv6hdr)))
+ goto drop;
+
return 1;
drop:
{ -1, }
};
-int ipv6_parse_hopopts(struct sk_buff *skb, int nhoff)
+int ipv6_parse_hopopts(struct sk_buff *skb)
{
- ((struct inet6_skb_parm*)skb->cb)->hop = sizeof(struct ipv6hdr);
- if (ip6_parse_tlv(tlvprochopopt_lst, skb))
- return sizeof(struct ipv6hdr);
+ struct inet6_skb_parm *opt = IP6CB(skb);
+
+ /*
+ * skb->nh.raw is equal to skb->data, and
+ * skb->h.raw - skb->nh.raw is always equal to
+ * sizeof(struct ipv6hdr) by definition of
+ * hop-by-hop options.
+ */
+ if (!pskb_may_pull(skb, sizeof(struct ipv6hdr) + 8) ||
+ !pskb_may_pull(skb, sizeof(struct ipv6hdr) + ((skb->h.raw[1] + 1) << 3))) {
+ kfree_skb(skb);
+ return -1;
+ }
+
+ opt->hop = sizeof(struct ipv6hdr);
+ if (ip6_parse_tlv(tlvprochopopt_lst, skb)) {
+ skb->h.raw += (skb->h.raw[1]+1)<<3;
+ opt->nhoff = sizeof(struct ipv6hdr);
+ return 1;
+ }
return -1;
}
* for headers.
*/
-static u8 *ipv6_build_rthdr(struct sk_buff *skb, u8 *prev_hdr,
- struct ipv6_rt_hdr *opt, struct in6_addr *addr)
-{
- struct rt0_hdr *phdr, *ihdr;
- int hops;
-
- ihdr = (struct rt0_hdr *) opt;
-
- phdr = (struct rt0_hdr *) skb_put(skb, (ihdr->rt_hdr.hdrlen + 1) << 3);
- memcpy(phdr, ihdr, sizeof(struct rt0_hdr));
-
- hops = ihdr->rt_hdr.hdrlen >> 1;
-
- if (hops > 1)
- memcpy(phdr->addr, ihdr->addr + 1,
- (hops - 1) * sizeof(struct in6_addr));
-
- ipv6_addr_copy(phdr->addr + (hops - 1), addr);
-
- phdr->rt_hdr.nexthdr = *prev_hdr;
- *prev_hdr = NEXTHDR_ROUTING;
- return &phdr->rt_hdr.nexthdr;
-}
-
-static u8 *ipv6_build_exthdr(struct sk_buff *skb, u8 *prev_hdr, u8 type, struct ipv6_opt_hdr *opt)
-{
- struct ipv6_opt_hdr *h = (struct ipv6_opt_hdr *)skb_put(skb, ipv6_optlen(opt));
-
- memcpy(h, opt, ipv6_optlen(opt));
- h->nexthdr = *prev_hdr;
- *prev_hdr = type;
- return &h->nexthdr;
-}
-
-u8 *ipv6_build_nfrag_opts(struct sk_buff *skb, u8 *prev_hdr, struct ipv6_txoptions *opt,
- struct in6_addr *daddr, u32 jumbolen)
-{
- struct ipv6_opt_hdr *h = (struct ipv6_opt_hdr *)skb->data;
-
- if (opt && opt->hopopt)
- prev_hdr = ipv6_build_exthdr(skb, prev_hdr, NEXTHDR_HOP, opt->hopopt);
-
- if (jumbolen) {
- u8 *jumboopt = (u8 *)skb_put(skb, 8);
-
- if (opt && opt->hopopt) {
- *jumboopt++ = IPV6_TLV_PADN;
- *jumboopt++ = 0;
- h->hdrlen++;
- } else {
- h = (struct ipv6_opt_hdr *)jumboopt;
- h->nexthdr = *prev_hdr;
- h->hdrlen = 0;
- jumboopt += 2;
- *prev_hdr = NEXTHDR_HOP;
- prev_hdr = &h->nexthdr;
- }
- jumboopt[0] = IPV6_TLV_JUMBO;
- jumboopt[1] = 4;
- *(u32*)(jumboopt+2) = htonl(jumbolen);
- }
- if (opt) {
- if (opt->dst0opt)
- prev_hdr = ipv6_build_exthdr(skb, prev_hdr, NEXTHDR_DEST, opt->dst0opt);
- if (opt->srcrt)
- prev_hdr = ipv6_build_rthdr(skb, prev_hdr, opt->srcrt, daddr);
- }
- return prev_hdr;
-}
-
-u8 *ipv6_build_frag_opts(struct sk_buff *skb, u8 *prev_hdr, struct ipv6_txoptions *opt)
-{
- if (opt->dst1opt)
- prev_hdr = ipv6_build_exthdr(skb, prev_hdr, NEXTHDR_DEST, opt->dst1opt);
- return prev_hdr;
-}
-
static void ipv6_push_rthdr(struct sk_buff *skb, u8 *proto,
struct ipv6_rt_hdr *opt,
struct in6_addr **addr_p)
u8 *proto,
struct in6_addr **daddr)
{
- if (opt->srcrt)
+ if (opt->srcrt) {
ipv6_push_rthdr(skb, proto, opt->srcrt, daddr);
- if (opt->dst0opt)
- ipv6_push_exthdr(skb, proto, NEXTHDR_DEST, opt->dst0opt);
+ /*
+ * IPV6_RTHDRDSTOPTS is ignored
+ * unless IPV6_RTHDR is set (RFC3542).
+ */
+ if (opt->dst0opt)
+ ipv6_push_exthdr(skb, proto, NEXTHDR_DEST, opt->dst0opt);
+ }
if (opt->hopopt)
ipv6_push_exthdr(skb, proto, NEXTHDR_HOP, opt->hopopt);
}
}
return opt2;
}
+
+EXPORT_SYMBOL_GPL(ipv6_dup_options);
+
+static int ipv6_renew_option(void *ohdr,
+ struct ipv6_opt_hdr __user *newopt, int newoptlen,
+ int inherit,
+ struct ipv6_opt_hdr **hdr,
+ char **p)
+{
+ if (inherit) {
+ if (ohdr) {
+ memcpy(*p, ohdr, ipv6_optlen((struct ipv6_opt_hdr *)ohdr));
+ *hdr = (struct ipv6_opt_hdr *)*p;
+ *p += CMSG_ALIGN(ipv6_optlen(*(struct ipv6_opt_hdr **)hdr));
+ }
+ } else {
+ if (newopt) {
+ if (copy_from_user(*p, newopt, newoptlen))
+ return -EFAULT;
+ *hdr = (struct ipv6_opt_hdr *)*p;
+ if (ipv6_optlen(*(struct ipv6_opt_hdr **)hdr) > newoptlen)
+ return -EINVAL;
+ *p += CMSG_ALIGN(newoptlen);
+ }
+ }
+ return 0;
+}
+
+struct ipv6_txoptions *
+ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
+ int newtype,
+ struct ipv6_opt_hdr __user *newopt, int newoptlen)
+{
+ int tot_len = 0;
+ char *p;
+ struct ipv6_txoptions *opt2;
+ int err;
+
+ if (newtype != IPV6_HOPOPTS && opt->hopopt)
+ tot_len += CMSG_ALIGN(ipv6_optlen(opt->hopopt));
+ if (newtype != IPV6_RTHDRDSTOPTS && opt->dst0opt)
+ tot_len += CMSG_ALIGN(ipv6_optlen(opt->dst0opt));
+ if (newtype != IPV6_RTHDR && opt->srcrt)
+ tot_len += CMSG_ALIGN(ipv6_optlen(opt->srcrt));
+ if (newtype != IPV6_DSTOPTS && opt->dst1opt)
+ tot_len += CMSG_ALIGN(ipv6_optlen(opt->dst1opt));
+ if (newopt && newoptlen)
+ tot_len += CMSG_ALIGN(newoptlen);
+
+ if (!tot_len)
+ return NULL;
+
+ tot_len += sizeof(*opt2);
+ opt2 = sock_kmalloc(sk, tot_len, GFP_ATOMIC);
+ if (!opt2)
+ return ERR_PTR(-ENOBUFS);
+
+ memset(opt2, 0, tot_len);
+
+ opt2->tot_len = tot_len;
+ p = (char *)(opt2 + 1);
+
+ err = ipv6_renew_option(opt->hopopt, newopt, newoptlen,
+ newtype != IPV6_HOPOPTS,
+ &opt2->hopopt, &p);
+ if (err)
+ goto out;
+
+ err = ipv6_renew_option(opt->dst0opt, newopt, newoptlen,
+ newtype != IPV6_RTHDRDSTOPTS,
+ &opt2->dst0opt, &p);
+ if (err)
+ goto out;
+
+ err = ipv6_renew_option(opt->srcrt, newopt, newoptlen,
+ newtype != IPV6_RTHDR,
+ (struct ipv6_opt_hdr **)opt2->srcrt, &p);
+ if (err)
+ goto out;
+
+ err = ipv6_renew_option(opt->dst1opt, newopt, newoptlen,
+ newtype != IPV6_DSTOPTS,
+ &opt2->dst1opt, &p);
+ if (err)
+ goto out;
+
+ opt2->opt_nflen = (opt2->hopopt ? ipv6_optlen(opt2->hopopt) : 0) +
+ (opt2->dst0opt ? ipv6_optlen(opt2->dst0opt) : 0) +
+ (opt2->srcrt ? ipv6_optlen(opt2->srcrt) : 0);
+ opt2->opt_flen = (opt2->dst1opt ? ipv6_optlen(opt2->dst1opt) : 0);
+
+ return opt2;
+out:
+ sock_kfree_s(sk, opt2, opt2->tot_len);
+ return ERR_PTR(err);
+}
+
+struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
+ struct ipv6_txoptions *opt)
+{
+ /*
+ * ignore the dest before srcrt unless srcrt is being included.
+ * --yoshfuji
+ */
+ if (opt && opt->dst0opt && !opt->srcrt) {
+ if (opt_space != opt) {
+ memcpy(opt_space, opt, sizeof(*opt_space));
+ opt = opt_space;
+ }
+ opt->opt_nflen -= ipv6_optlen(opt->dst0opt);
+ opt->dst0opt = NULL;
+ }
+
+ return opt;
+}
+
git://git.onelab.eu / linux-2.6.git / blobdiff