return true;
}
+#ifdef CONFIG_NF_CT_PROTO_UDPLITE
+static int udplite_error(struct net *net, struct nf_conn *tmpl,
+ struct sk_buff *skb,
+ unsigned int dataoff,
+ enum ip_conntrack_info *ctinfo,
+ u8 pf, unsigned int hooknum)
+{
+ unsigned int udplen = skb->len - dataoff;
+ 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) {
+ if (LOG_INVALID(net, IPPROTO_UDPLITE))
+ nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
+ "nf_ct_udplite: short packet ");
+ return -NF_ACCEPT;
+ }
+
+ cscov = ntohs(hdr->len);
+ if (cscov == 0) {
+ cscov = udplen;
+ } else if (cscov < sizeof(*hdr) || cscov > udplen) {
+ if (LOG_INVALID(net, IPPROTO_UDPLITE))
+ nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
+ "nf_ct_udplite: invalid checksum coverage ");
+ return -NF_ACCEPT;
+ }
+
+ /* UDPLITE mandates checksums */
+ if (!hdr->check) {
+ if (LOG_INVALID(net, IPPROTO_UDPLITE))
+ nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
+ "nf_ct_udplite: checksum missing ");
+ return -NF_ACCEPT;
+ }
+
+ /* Checksum invalid? Ignore. */
+ 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(net, pf, 0, skb, NULL, NULL, NULL,
+ "nf_ct_udplite: bad UDPLite checksum ");
+ return -NF_ACCEPT;
+ }
+
+ return NF_ACCEPT;
+}
+#endif
+
static int udp_error(struct net *net, struct nf_conn *tmpl, struct sk_buff *skb,
unsigned int dataoff, enum ip_conntrack_info *ctinfo,
u_int8_t pf,
};
EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udp4);
+#ifdef CONFIG_NF_CT_PROTO_UDPLITE
+struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite4 __read_mostly =
+{
+ .l3proto = PF_INET,
+ .l4proto = IPPROTO_UDPLITE,
+ .name = "udplite",
+ .allow_clash = true,
+ .pkt_to_tuple = udp_pkt_to_tuple,
+ .invert_tuple = udp_invert_tuple,
+ .print_tuple = udp_print_tuple,
+ .packet = udp_packet,
+ .get_timeouts = udp_get_timeouts,
+ .new = udp_new,
+ .error = udplite_error,
+#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
+ .tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
+ .nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
+ .nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
+ .nla_policy = nf_ct_port_nla_policy,
+#endif
+#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
+ .ctnl_timeout = {
+ .nlattr_to_obj = udp_timeout_nlattr_to_obj,
+ .obj_to_nlattr = udp_timeout_obj_to_nlattr,
+ .nlattr_max = CTA_TIMEOUT_UDP_MAX,
+ .obj_size = sizeof(unsigned int) * CTA_TIMEOUT_UDP_MAX,
+ .nla_policy = udp_timeout_nla_policy,
+ },
+#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
+ .init_net = udp_init_net,
+ .get_net_proto = udp_get_net_proto,
+};
+EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udplite4);
+#endif
+
struct nf_conntrack_l4proto nf_conntrack_l4proto_udp6 __read_mostly =
{
.l3proto = PF_INET6,
.get_net_proto = udp_get_net_proto,
};
EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udp6);
+
+#ifdef CONFIG_NF_CT_PROTO_UDPLITE
+struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite6 __read_mostly =
+{
+ .l3proto = PF_INET6,
+ .l4proto = IPPROTO_UDPLITE,
+ .name = "udplite",
+ .allow_clash = true,
+ .pkt_to_tuple = udp_pkt_to_tuple,
+ .invert_tuple = udp_invert_tuple,
+ .print_tuple = udp_print_tuple,
+ .packet = udp_packet,
+ .get_timeouts = udp_get_timeouts,
+ .new = udp_new,
+ .error = udplite_error,
+#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
+ .tuple_to_nlattr = nf_ct_port_tuple_to_nlattr,
+ .nlattr_to_tuple = nf_ct_port_nlattr_to_tuple,
+ .nlattr_tuple_size = nf_ct_port_nlattr_tuple_size,
+ .nla_policy = nf_ct_port_nla_policy,
+#endif
+#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
+ .ctnl_timeout = {
+ .nlattr_to_obj = udp_timeout_nlattr_to_obj,
+ .obj_to_nlattr = udp_timeout_obj_to_nlattr,
+ .nlattr_max = CTA_TIMEOUT_UDP_MAX,
+ .obj_size = sizeof(unsigned int) * CTA_TIMEOUT_UDP_MAX,
+ .nla_policy = udp_timeout_nla_policy,
+ },
+#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
+ .init_net = udp_init_net,
+ .get_net_proto = udp_get_net_proto,
+};
+EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udplite6);
+#endif
+++ /dev/null
-/* (C) 1999-2001 Paul `Rusty' Russell
- * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
- * (C) 2007 Patrick McHardy <kaber@trash.net>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/types.h>
-#include <linux/timer.h>
-#include <linux/udp.h>
-#include <linux/seq_file.h>
-#include <linux/skbuff.h>
-#include <linux/ipv6.h>
-#include <net/ip6_checksum.h>
-#include <net/checksum.h>
-
-#include <linux/netfilter.h>
-#include <linux/netfilter_ipv4.h>
-#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 udplite_timeouts[UDPLITE_CT_MAX] = {
- [UDPLITE_CT_UNREPLIED] = 30*HZ,
- [UDPLITE_CT_REPLIED] = 180*HZ,
-};
-
-static inline struct nf_udplite_net *udplite_pernet(struct net *net)
-{
- return &net->ct.nf_ct_proto.udplite;
-}
-
-static bool udplite_pkt_to_tuple(const struct sk_buff *skb,
- unsigned int dataoff,
- struct net *net,
- struct nf_conntrack_tuple *tuple)
-{
- const struct udphdr *hp;
- struct udphdr _hdr;
-
- /* Actually only need first 4 bytes to get ports. */
- hp = skb_header_pointer(skb, dataoff, 4, &_hdr);
- if (hp == NULL)
- return false;
-
- tuple->src.u.udp.port = hp->source;
- tuple->dst.u.udp.port = hp->dest;
- return true;
-}
-
-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 true;
-}
-
-/* Print out the per-protocol part of the tuple. */
-static void udplite_print_tuple(struct seq_file *s,
- const struct nf_conntrack_tuple *tuple)
-{
- seq_printf(s, "sport=%hu dport=%hu ",
- ntohs(tuple->src.u.udp.port),
- ntohs(tuple->dst.u.udp.port));
-}
-
-static unsigned int *udplite_get_timeouts(struct net *net)
-{
- return udplite_pernet(net)->timeouts;
-}
-
-/* Returns verdict for packet, and may modify conntracktype */
-static int udplite_packet(struct nf_conn *ct,
- const struct sk_buff *skb,
- unsigned int dataoff,
- enum ip_conntrack_info ctinfo,
- u_int8_t pf,
- unsigned int hooknum,
- unsigned int *timeouts)
-{
- /* If we've seen traffic both ways, this is some kind of UDP
- stream. Extend timeout. */
- if (test_bit(IPS_SEEN_REPLY_BIT, &ct->status)) {
- nf_ct_refresh_acct(ct, ctinfo, skb,
- timeouts[UDPLITE_CT_REPLIED]);
- /* Also, more likely to be important, and not a probe */
- if (!test_and_set_bit(IPS_ASSURED_BIT, &ct->status))
- nf_conntrack_event_cache(IPCT_ASSURED, ct);
- } else {
- nf_ct_refresh_acct(ct, ctinfo, skb,
- timeouts[UDPLITE_CT_UNREPLIED]);
- }
- return NF_ACCEPT;
-}
-
-/* Called when a new connection for this protocol found. */
-static bool udplite_new(struct nf_conn *ct, const struct sk_buff *skb,
- unsigned int dataoff, unsigned int *timeouts)
-{
- return true;
-}
-
-static int udplite_error(struct net *net, struct nf_conn *tmpl,
- struct sk_buff *skb,
- unsigned int dataoff,
- enum ip_conntrack_info *ctinfo,
- u_int8_t pf,
- unsigned int hooknum)
-{
- unsigned int udplen = skb->len - dataoff;
- 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(net, IPPROTO_UDPLITE))
- nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
- "nf_ct_udplite: short packet ");
- return -NF_ACCEPT;
- }
-
- cscov = ntohs(hdr->len);
- if (cscov == 0)
- cscov = udplen;
- else if (cscov < sizeof(*hdr) || cscov > udplen) {
- if (LOG_INVALID(net, IPPROTO_UDPLITE))
- nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
- "nf_ct_udplite: invalid checksum coverage ");
- return -NF_ACCEPT;
- }
-
- /* UDPLITE mandates checksums */
- if (!hdr->check) {
- if (LOG_INVALID(net, IPPROTO_UDPLITE))
- nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
- "nf_ct_udplite: checksum missing ");
- return -NF_ACCEPT;
- }
-
- /* Checksum invalid? Ignore. */
- 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(net, pf, 0, skb, NULL, NULL, NULL,
- "nf_ct_udplite: bad UDPLite checksum ");
- return -NF_ACCEPT;
- }
-
- return NF_ACCEPT;
-}
-
-#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
-
-#include <linux/netfilter/nfnetlink.h>
-#include <linux/netfilter/nfnetlink_cttimeout.h>
-
-static int udplite_timeout_nlattr_to_obj(struct nlattr *tb[],
- struct net *net, void *data)
-{
- unsigned int *timeouts = data;
- struct nf_udplite_net *un = udplite_pernet(net);
-
- /* set default timeouts for UDPlite. */
- timeouts[UDPLITE_CT_UNREPLIED] = un->timeouts[UDPLITE_CT_UNREPLIED];
- timeouts[UDPLITE_CT_REPLIED] = un->timeouts[UDPLITE_CT_REPLIED];
-
- if (tb[CTA_TIMEOUT_UDPLITE_UNREPLIED]) {
- timeouts[UDPLITE_CT_UNREPLIED] =
- ntohl(nla_get_be32(tb[CTA_TIMEOUT_UDPLITE_UNREPLIED])) * HZ;
- }
- if (tb[CTA_TIMEOUT_UDPLITE_REPLIED]) {
- timeouts[UDPLITE_CT_REPLIED] =
- ntohl(nla_get_be32(tb[CTA_TIMEOUT_UDPLITE_REPLIED])) * HZ;
- }
- return 0;
-}
-
-static int
-udplite_timeout_obj_to_nlattr(struct sk_buff *skb, const void *data)
-{
- const unsigned int *timeouts = data;
-
- if (nla_put_be32(skb, CTA_TIMEOUT_UDPLITE_UNREPLIED,
- htonl(timeouts[UDPLITE_CT_UNREPLIED] / HZ)) ||
- nla_put_be32(skb, CTA_TIMEOUT_UDPLITE_REPLIED,
- htonl(timeouts[UDPLITE_CT_REPLIED] / HZ)))
- goto nla_put_failure;
- return 0;
-
-nla_put_failure:
- return -ENOSPC;
-}
-
-static const struct nla_policy
-udplite_timeout_nla_policy[CTA_TIMEOUT_UDPLITE_MAX+1] = {
- [CTA_TIMEOUT_UDPLITE_UNREPLIED] = { .type = NLA_U32 },
- [CTA_TIMEOUT_UDPLITE_REPLIED] = { .type = NLA_U32 },
-};
-#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
-
-#ifdef CONFIG_SYSCTL
-static struct ctl_table udplite_sysctl_table[] = {
- {
- .procname = "nf_conntrack_udplite_timeout",
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec_jiffies,
- },
- {
- .procname = "nf_conntrack_udplite_timeout_stream",
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec_jiffies,
- },
- { }
-};
-#endif /* CONFIG_SYSCTL */
-
-static int udplite_kmemdup_sysctl_table(struct nf_proto_net *pn,
- struct nf_udplite_net *un)
-{
-#ifdef CONFIG_SYSCTL
- if (pn->ctl_table)
- return 0;
-
- pn->ctl_table = kmemdup(udplite_sysctl_table,
- sizeof(udplite_sysctl_table),
- GFP_KERNEL);
- if (!pn->ctl_table)
- return -ENOMEM;
-
- pn->ctl_table[0].data = &un->timeouts[UDPLITE_CT_UNREPLIED];
- pn->ctl_table[1].data = &un->timeouts[UDPLITE_CT_REPLIED];
-#endif
- return 0;
-}
-
-static int udplite_init_net(struct net *net, u_int16_t proto)
-{
- struct nf_udplite_net *un = udplite_pernet(net);
- struct nf_proto_net *pn = &un->pn;
-
- if (!pn->users) {
- int i;
-
- for (i = 0 ; i < UDPLITE_CT_MAX; i++)
- un->timeouts[i] = udplite_timeouts[i];
- }
-
- return udplite_kmemdup_sysctl_table(pn, un);
-}
-
-struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite4 __read_mostly =
-{
- .l3proto = PF_INET,
- .l4proto = IPPROTO_UDPLITE,
- .name = "udplite",
- .allow_clash = true,
- .pkt_to_tuple = udplite_pkt_to_tuple,
- .invert_tuple = udplite_invert_tuple,
- .print_tuple = udplite_print_tuple,
- .packet = udplite_packet,
- .get_timeouts = udplite_get_timeouts,
- .new = udplite_new,
- .error = udplite_error,
-#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
- .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
-#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
- .ctnl_timeout = {
- .nlattr_to_obj = udplite_timeout_nlattr_to_obj,
- .obj_to_nlattr = udplite_timeout_obj_to_nlattr,
- .nlattr_max = CTA_TIMEOUT_UDPLITE_MAX,
- .obj_size = sizeof(unsigned int) *
- CTA_TIMEOUT_UDPLITE_MAX,
- .nla_policy = udplite_timeout_nla_policy,
- },
-#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
- .init_net = udplite_init_net,
-};
-EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udplite4);
-
-struct nf_conntrack_l4proto nf_conntrack_l4proto_udplite6 __read_mostly =
-{
- .l3proto = PF_INET6,
- .l4proto = IPPROTO_UDPLITE,
- .name = "udplite",
- .allow_clash = true,
- .pkt_to_tuple = udplite_pkt_to_tuple,
- .invert_tuple = udplite_invert_tuple,
- .print_tuple = udplite_print_tuple,
- .packet = udplite_packet,
- .get_timeouts = udplite_get_timeouts,
- .new = udplite_new,
- .error = udplite_error,
-#if IS_ENABLED(CONFIG_NF_CT_NETLINK)
- .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
-#if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT)
- .ctnl_timeout = {
- .nlattr_to_obj = udplite_timeout_nlattr_to_obj,
- .obj_to_nlattr = udplite_timeout_obj_to_nlattr,
- .nlattr_max = CTA_TIMEOUT_UDPLITE_MAX,
- .obj_size = sizeof(unsigned int) *
- CTA_TIMEOUT_UDPLITE_MAX,
- .nla_policy = udplite_timeout_nla_policy,
- },
-#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
- .init_net = udplite_init_net,
-};
-EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_udplite6);
projects / mirror_ubuntu-artful-kernel.git / commitdiff