#include <linux/netfilter_ipv6.h>
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_ecache.h>
+#include <net/netfilter/nf_log.h>
static unsigned int nf_ct_udplite_timeout __read_mostly = 30*HZ;
static unsigned int nf_ct_udplite_timeout_stream __read_mostly = 180*HZ;
-static int udplite_pkt_to_tuple(const struct sk_buff *skb,
- unsigned int dataoff,
- struct nf_conntrack_tuple *tuple)
+static bool udplite_pkt_to_tuple(const struct sk_buff *skb,
+ unsigned int dataoff,
+ struct nf_conntrack_tuple *tuple)
{
- struct udphdr _hdr, *hp;
+ const struct udphdr *hp;
+ struct udphdr _hdr;
hp = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
if (hp == NULL)
- return 0;
+ return false;
tuple->src.u.udp.port = hp->source;
tuple->dst.u.udp.port = hp->dest;
- return 1;
+ return true;
}
-static int udplite_invert_tuple(struct nf_conntrack_tuple *tuple,
- const struct nf_conntrack_tuple *orig)
+static bool udplite_invert_tuple(struct nf_conntrack_tuple *tuple,
+ const struct nf_conntrack_tuple *orig)
{
tuple->src.u.udp.port = orig->dst.u.udp.port;
tuple->dst.u.udp.port = orig->src.u.udp.port;
- return 1;
+ return true;
}
/* Print out the per-protocol part of the tuple. */
ntohs(tuple->dst.u.udp.port));
}
-/* Print out the private part of the conntrack. */
-static int udplite_print_conntrack(struct seq_file *s,
- const struct nf_conn *conntrack)
-{
- return 0;
-}
-
/* Returns verdict for packet, and may modify conntracktype */
-static int udplite_packet(struct nf_conn *conntrack,
+static int udplite_packet(struct nf_conn *ct,
const struct sk_buff *skb,
unsigned int dataoff,
enum ip_conntrack_info ctinfo,
- int pf,
+ u_int8_t pf,
unsigned int hooknum)
{
/* If we've seen traffic both ways, this is some kind of UDP
stream. Extend timeout. */
- if (test_bit(IPS_SEEN_REPLY_BIT, &conntrack->status)) {
- nf_ct_refresh_acct(conntrack, ctinfo, skb,
+ if (test_bit(IPS_SEEN_REPLY_BIT, &ct->status)) {
+ nf_ct_refresh_acct(ct, ctinfo, skb,
nf_ct_udplite_timeout_stream);
/* Also, more likely to be important, and not a probe */
- if (!test_and_set_bit(IPS_ASSURED_BIT, &conntrack->status))
- nf_conntrack_event_cache(IPCT_STATUS, skb);
+ if (!test_and_set_bit(IPS_ASSURED_BIT, &ct->status))
+ nf_conntrack_event_cache(IPCT_STATUS, ct);
} else
- nf_ct_refresh_acct(conntrack, ctinfo, skb,
- nf_ct_udplite_timeout);
+ nf_ct_refresh_acct(ct, ctinfo, skb, nf_ct_udplite_timeout);
return NF_ACCEPT;
}
/* Called when a new connection for this protocol found. */
-static int udplite_new(struct nf_conn *conntrack, const struct sk_buff *skb,
- unsigned int dataoff)
+static bool udplite_new(struct nf_conn *ct, const struct sk_buff *skb,
+ unsigned int dataoff)
{
- return 1;
+ return true;
}
-static int udplite_error(struct sk_buff *skb, unsigned int dataoff,
+static int udplite_error(struct net *net,
+ struct sk_buff *skb,
+ unsigned int dataoff,
enum ip_conntrack_info *ctinfo,
- int pf,
+ u_int8_t pf,
unsigned int hooknum)
{
unsigned int udplen = skb->len - dataoff;
- struct udphdr _hdr, *hdr;
+ const struct udphdr *hdr;
+ struct udphdr _hdr;
unsigned int cscov;
/* Header is too small? */
hdr = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
if (hdr == NULL) {
- if (LOG_INVALID(IPPROTO_UDPLITE))
+ if (LOG_INVALID(net, IPPROTO_UDPLITE))
nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
"nf_ct_udplite: short packet ");
return -NF_ACCEPT;
if (cscov == 0)
cscov = udplen;
else if (cscov < sizeof(*hdr) || cscov > udplen) {
- if (LOG_INVALID(IPPROTO_UDPLITE))
+ if (LOG_INVALID(net, IPPROTO_UDPLITE))
nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
"nf_ct_udplite: invalid checksum coverage ");
return -NF_ACCEPT;
/* UDPLITE mandates checksums */
if (!hdr->check) {
- if (LOG_INVALID(IPPROTO_UDPLITE))
+ if (LOG_INVALID(net, IPPROTO_UDPLITE))
nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
"nf_ct_udplite: checksum missing ");
return -NF_ACCEPT;
}
/* Checksum invalid? Ignore. */
- if (nf_conntrack_checksum && !skb_csum_unnecessary(skb) &&
- hooknum == NF_INET_PRE_ROUTING) {
- if (pf == PF_INET) {
- struct iphdr *iph = ip_hdr(skb);
-
- skb->csum = csum_tcpudp_nofold(iph->saddr, iph->daddr,
- udplen, IPPROTO_UDPLITE, 0);
- } else {
- struct ipv6hdr *ipv6h = ipv6_hdr(skb);
- __wsum hsum = skb_checksum(skb, 0, dataoff, 0);
-
- skb->csum = ~csum_unfold(
- csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr,
- udplen, IPPROTO_UDPLITE,
- csum_sub(0, hsum)));
- }
-
- skb->ip_summed = CHECKSUM_NONE;
- if (__skb_checksum_complete_head(skb, dataoff + cscov)) {
- if (LOG_INVALID(IPPROTO_UDPLITE))
- nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
- "nf_ct_udplite: bad UDPLite "
- "checksum ");
- return -NF_ACCEPT;
- }
- skb->ip_summed = CHECKSUM_UNNECESSARY;
+ if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
+ nf_checksum_partial(skb, hooknum, dataoff, cscov, IPPROTO_UDP,
+ pf)) {
+ if (LOG_INVALID(net, IPPROTO_UDPLITE))
+ nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
+ "nf_ct_udplite: bad UDPLite checksum ");
+ return -NF_ACCEPT;
}
return NF_ACCEPT;
.data = &nf_ct_udplite_timeout,
.maxlen = sizeof(unsigned int),
.mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
+ .proc_handler = proc_dointvec_jiffies,
},
{
.ctl_name = CTL_UNNUMBERED,
.data = &nf_ct_udplite_timeout_stream,
.maxlen = sizeof(unsigned int),
.mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
+ .proc_handler = proc_dointvec_jiffies,
},
{
.ctl_name = 0
.pkt_to_tuple = udplite_pkt_to_tuple,
.invert_tuple = udplite_invert_tuple,
.print_tuple = udplite_print_tuple,
- .print_conntrack = udplite_print_conntrack,
.packet = udplite_packet,
.new = udplite_new,
.error = udplite_error,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
+ .nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
.nla_policy = nf_ct_port_nla_policy,
#endif
.pkt_to_tuple = udplite_pkt_to_tuple,
.invert_tuple = udplite_invert_tuple,
.print_tuple = udplite_print_tuple,
- .print_conntrack = udplite_print_conntrack,
.packet = udplite_packet,
.new = udplite_new,
.error = udplite_error,
#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
.tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
+ .nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
.nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
.nla_policy = nf_ct_port_nla_policy,
#endif
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff