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netfilter: netns nf_conntrack: per-netns net.netfilter.nf_conntrack_log_invalid sysctl

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Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
This commit is contained in:
Alexey Dobriyan 2008-10-08 11:35:08 +02:00 committed by Patrick McHardy
parent c04d05529a
commit c2a2c7e0cc
11 changed files with 39 additions and 36 deletions
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15
include/net/netfilter/nf_conntrack_l4proto.h
View File

@ -117,20 +117,19 @@ extern int nf_ct_port_nlattr_to_tuple(struct nlattr *tb[],
struct nf_conntrack_tuple *t);
extern const struct nla_policy nf_ct_port_nla_policy[];
/* Log invalid packets */
extern unsigned int nf_ct_log_invalid;
#ifdef CONFIG_SYSCTL
#ifdef DEBUG_INVALID_PACKETS
#define LOG_INVALID(proto) \
(nf_ct_log_invalid == (proto) || nf_ct_log_invalid == IPPROTO_RAW)
#define LOG_INVALID(net, proto) \
((net)->ct.sysctl_log_invalid == (proto) || \
(net)->ct.sysctl_log_invalid == IPPROTO_RAW)
#else
#define LOG_INVALID(proto) \
((nf_ct_log_invalid == (proto) || nf_ct_log_invalid == IPPROTO_RAW) \
#define LOG_INVALID(net, proto) \
(((net)->ct.sysctl_log_invalid == (proto) || \
(net)->ct.sysctl_log_invalid == IPPROTO_RAW) \
&& net_ratelimit())
#endif
#else
#define LOG_INVALID(proto) 0
#define LOG_INVALID(net, proto) 0
#endif /* CONFIG_SYSCTL */
#endif /*_NF_CONNTRACK_PROTOCOL_H*/

1
include/net/netns/conntrack.h
View File

@ -18,6 +18,7 @@ struct netns_ct {
struct nf_conntrack_ecache *ecache;
#endif
int sysctl_checksum;
unsigned int sysctl_log_invalid; /* Log invalid packets */
#ifdef CONFIG_SYSCTL
struct ctl_table_header *sysctl_header;
#endif

2
net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
View File

@ -278,7 +278,7 @@ static ctl_table ip_ct_sysctl_table[] = {
{
.ctl_name = NET_IPV4_NF_CONNTRACK_LOG_INVALID,
.procname = "ip_conntrack_log_invalid",
.data = &nf_ct_log_invalid,
.data = &init_net.ct.sysctl_log_invalid,
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec_minmax,

6
net/ipv4/netfilter/nf_conntrack_proto_icmp.c
View File

@ -181,7 +181,7 @@ icmp_error(struct net *net, struct sk_buff *skb, unsigned int dataoff,
/* Not enough header? */
icmph = skb_header_pointer(skb, ip_hdrlen(skb), sizeof(_ih), &_ih);
if (icmph == NULL) {
if (LOG_INVALID(IPPROTO_ICMP))
if (LOG_INVALID(net, IPPROTO_ICMP))
nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL,
"nf_ct_icmp: short packet ");
return -NF_ACCEPT;
@ -190,7 +190,7 @@ icmp_error(struct net *net, struct sk_buff *skb, unsigned int dataoff,
/* See ip_conntrack_proto_tcp.c */
if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
nf_ip_checksum(skb, hooknum, dataoff, 0)) {
if (LOG_INVALID(IPPROTO_ICMP))
if (LOG_INVALID(net, IPPROTO_ICMP))
nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL,
"nf_ct_icmp: bad HW ICMP checksum ");
return -NF_ACCEPT;
@ -203,7 +203,7 @@ icmp_error(struct net *net, struct sk_buff *skb, unsigned int dataoff,
* discarded.
*/
if (icmph->type > NR_ICMP_TYPES) {
if (LOG_INVALID(IPPROTO_ICMP))
if (LOG_INVALID(net, IPPROTO_ICMP))
nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL,
"nf_ct_icmp: invalid ICMP type ");
return -NF_ACCEPT;

2
net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
View File

@ -181,7 +181,7 @@ icmpv6_error(struct net *net, struct sk_buff *skb, unsigned int dataoff,
icmp6h = skb_header_pointer(skb, dataoff, sizeof(_ih), &_ih);
if (icmp6h == NULL) {
if (LOG_INVALID(IPPROTO_ICMPV6))
if (LOG_INVALID(net, IPPROTO_ICMPV6))
nf_log_packet(PF_INET6, 0, skb, NULL, NULL, NULL,
"nf_ct_icmpv6: short packet ");
return -NF_ACCEPT;

1
net/netfilter/nf_conntrack_core.c
View File

@ -53,7 +53,6 @@ EXPORT_SYMBOL_GPL(nf_conntrack_max);
struct nf_conn nf_conntrack_untracked __read_mostly;
EXPORT_SYMBOL_GPL(nf_conntrack_untracked);
unsigned int nf_ct_log_invalid __read_mostly;
static struct kmem_cache *nf_conntrack_cachep __read_mostly;
static int nf_conntrack_hash_rnd_initted;

10
net/netfilter/nf_conntrack_proto_dccp.c
View File

@ -418,6 +418,7 @@ static bool dccp_invert_tuple(struct nf_conntrack_tuple *inv,
static bool dccp_new(struct nf_conn *ct, const struct sk_buff *skb,
unsigned int dataoff)
{
struct net *net = nf_ct_net(ct);
struct dccp_hdr _dh, *dh;
const char *msg;
u_int8_t state;
@ -445,7 +446,7 @@ static bool dccp_new(struct nf_conn *ct, const struct sk_buff *skb,
return true;
out_invalid:
if (LOG_INVALID(IPPROTO_DCCP))
if (LOG_INVALID(net, IPPROTO_DCCP))
nf_log_packet(nf_ct_l3num(ct), 0, skb, NULL, NULL, NULL, msg);
return false;
}
@ -463,6 +464,7 @@ static int dccp_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)
{
struct net *net = nf_ct_net(ct);
enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
struct dccp_hdr _dh, *dh;
u_int8_t type, old_state, new_state;
@ -524,13 +526,13 @@ static int dccp_packet(struct nf_conn *ct, const struct sk_buff *skb,
ct->proto.dccp.last_pkt = type;
write_unlock_bh(&dccp_lock);
if (LOG_INVALID(IPPROTO_DCCP))
if (LOG_INVALID(net, IPPROTO_DCCP))
nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
"nf_ct_dccp: invalid packet ignored ");
return NF_ACCEPT;
case CT_DCCP_INVALID:
write_unlock_bh(&dccp_lock);
if (LOG_INVALID(IPPROTO_DCCP))
if (LOG_INVALID(net, IPPROTO_DCCP))
nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
"nf_ct_dccp: invalid state transition ");
return -NF_ACCEPT;
@ -590,7 +592,7 @@ static int dccp_error(struct net *net, struct sk_buff *skb,
return NF_ACCEPT;
out_invalid:
if (LOG_INVALID(IPPROTO_DCCP))
if (LOG_INVALID(net, IPPROTO_DCCP))
nf_log_packet(pf, 0, skb, NULL, NULL, NULL, msg);
return -NF_ACCEPT;
}

18
net/netfilter/nf_conntrack_proto_tcp.c
View File

@ -488,6 +488,7 @@ static bool tcp_in_window(const struct nf_conn *ct,
const struct tcphdr *tcph,
u_int8_t pf)
{
struct net *net = nf_ct_net(ct);
struct ip_ct_tcp_state *sender = &state->seen[dir];
struct ip_ct_tcp_state *receiver = &state->seen[!dir];
const struct nf_conntrack_tuple *tuple = &ct->tuplehash[dir].tuple;
@ -668,7 +669,7 @@ static bool tcp_in_window(const struct nf_conn *ct,
if (sender->flags & IP_CT_TCP_FLAG_BE_LIBERAL ||
nf_ct_tcp_be_liberal)
res = true;
if (!res && LOG_INVALID(IPPROTO_TCP))
if (!res && LOG_INVALID(net, IPPROTO_TCP))
nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
"nf_ct_tcp: %s ",
before(seq, sender->td_maxend + 1) ?
@ -761,7 +762,7 @@ static int tcp_error(struct net *net,
/* Smaller that minimal TCP header? */
th = skb_header_pointer(skb, dataoff, sizeof(_tcph), &_tcph);
if (th == NULL) {
if (LOG_INVALID(IPPROTO_TCP))
if (LOG_INVALID(net, IPPROTO_TCP))
nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
"nf_ct_tcp: short packet ");
return -NF_ACCEPT;
@ -769,7 +770,7 @@ static int tcp_error(struct net *net,
/* Not whole TCP header or malformed packet */
if (th->doff*4 < sizeof(struct tcphdr) || tcplen < th->doff*4) {
if (LOG_INVALID(IPPROTO_TCP))
if (LOG_INVALID(net, IPPROTO_TCP))
nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
"nf_ct_tcp: truncated/malformed packet ");
return -NF_ACCEPT;
@ -782,7 +783,7 @@ static int tcp_error(struct net *net,
/* FIXME: Source route IP option packets --RR */
if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
nf_checksum(skb, hooknum, dataoff, IPPROTO_TCP, pf)) {
if (LOG_INVALID(IPPROTO_TCP))
if (LOG_INVALID(net, IPPROTO_TCP))
nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
"nf_ct_tcp: bad TCP checksum ");
return -NF_ACCEPT;
@ -791,7 +792,7 @@ static int tcp_error(struct net *net,
/* Check TCP flags. */
tcpflags = (((u_int8_t *)th)[13] & ~(TH_ECE|TH_CWR|TH_PUSH));
if (!tcp_valid_flags[tcpflags]) {
if (LOG_INVALID(IPPROTO_TCP))
if (LOG_INVALID(net, IPPROTO_TCP))
nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
"nf_ct_tcp: invalid TCP flag combination ");
return -NF_ACCEPT;
@ -808,6 +809,7 @@ static int tcp_packet(struct nf_conn *ct,
u_int8_t pf,
unsigned int hooknum)
{
struct net *net = nf_ct_net(ct);
struct nf_conntrack_tuple *tuple;
enum tcp_conntrack new_state, old_state;
enum ip_conntrack_dir dir;
@ -886,7 +888,7 @@ static int tcp_packet(struct nf_conn *ct,
* thus initiate a clean new session.
*/
write_unlock_bh(&tcp_lock);
if (LOG_INVALID(IPPROTO_TCP))
if (LOG_INVALID(net, IPPROTO_TCP))
nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
"nf_ct_tcp: killing out of sync session ");
nf_ct_kill(ct);
@ -899,7 +901,7 @@ static int tcp_packet(struct nf_conn *ct,
segment_seq_plus_len(ntohl(th->seq), skb->len, dataoff, th);
write_unlock_bh(&tcp_lock);
if (LOG_INVALID(IPPROTO_TCP))
if (LOG_INVALID(net, IPPROTO_TCP))
nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
"nf_ct_tcp: invalid packet ignored ");
return NF_ACCEPT;
@ -908,7 +910,7 @@ static int tcp_packet(struct nf_conn *ct,
pr_debug("nf_ct_tcp: Invalid dir=%i index=%u ostate=%u\n",
dir, get_conntrack_index(th), old_state);
write_unlock_bh(&tcp_lock);
if (LOG_INVALID(IPPROTO_TCP))
if (LOG_INVALID(net, IPPROTO_TCP))
nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
"nf_ct_tcp: invalid state ");
return -NF_ACCEPT;

6
net/netfilter/nf_conntrack_proto_udp.c
View File

@ -101,7 +101,7 @@ static int udp_error(struct net *net, struct sk_buff *skb, unsigned int dataoff,
/* Header is too small? */
hdr = skb_header_pointer(skb, dataoff, sizeof(_hdr), &_hdr);
if (hdr == NULL) {
if (LOG_INVALID(IPPROTO_UDP))
if (LOG_INVALID(net, IPPROTO_UDP))
nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
"nf_ct_udp: short packet ");
return -NF_ACCEPT;
@ -109,7 +109,7 @@ static int udp_error(struct net *net, struct sk_buff *skb, unsigned int dataoff,
/* Truncated/malformed packets */
if (ntohs(hdr->len) > udplen || ntohs(hdr->len) < sizeof(*hdr)) {
if (LOG_INVALID(IPPROTO_UDP))
if (LOG_INVALID(net, IPPROTO_UDP))
nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
"nf_ct_udp: truncated/malformed packet ");
return -NF_ACCEPT;
@ -125,7 +125,7 @@ static int udp_error(struct net *net, struct sk_buff *skb, unsigned int dataoff,
* FIXME: Source route IP option packets --RR */
if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
nf_checksum(skb, hooknum, dataoff, IPPROTO_UDP, pf)) {
if (LOG_INVALID(IPPROTO_UDP))
if (LOG_INVALID(net, IPPROTO_UDP))
nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
"nf_ct_udp: bad UDP checksum ");
return -NF_ACCEPT;

8
net/netfilter/nf_conntrack_proto_udplite.c
View File

@ -104,7 +104,7 @@ static int udplite_error(struct net *net,
/* 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;
@ -114,7 +114,7 @@ static int udplite_error(struct net *net,
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;
@ -122,7 +122,7 @@ static int udplite_error(struct net *net,
/* 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;
@ -132,7 +132,7 @@ static int udplite_error(struct net *net,
if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING &&
nf_checksum_partial(skb, hooknum, dataoff, cscov, IPPROTO_UDP,
pf)) {
if (LOG_INVALID(IPPROTO_UDPLITE))
if (LOG_INVALID(net, IPPROTO_UDPLITE))
nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
"nf_ct_udplite: bad UDPLite checksum ");
return -NF_ACCEPT;

6
net/netfilter/nf_conntrack_standalone.c
View File

@ -365,7 +365,7 @@ static ctl_table nf_ct_sysctl_table[] = {
{
.ctl_name = NET_NF_CONNTRACK_LOG_INVALID,
.procname = "nf_conntrack_log_invalid",
.data = &nf_ct_log_invalid,
.data = &init_net.ct.sysctl_log_invalid,
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec_minmax,
@ -403,8 +403,6 @@ static struct ctl_path nf_ct_path[] = {
{ }
};
EXPORT_SYMBOL_GPL(nf_ct_log_invalid);
static int nf_conntrack_standalone_init_sysctl(struct net *net)
{
struct ctl_table *table;
@ -423,6 +421,7 @@ static int nf_conntrack_standalone_init_sysctl(struct net *net)
table[1].data = &net->ct.count;
table[3].data = &net->ct.sysctl_checksum;
table[4].data = &net->ct.sysctl_log_invalid;
net->ct.sysctl_header = register_net_sysctl_table(net,
nf_net_netfilter_sysctl_path, table);
@ -473,6 +472,7 @@ static int nf_conntrack_net_init(struct net *net)
if (ret < 0)
goto out_proc;
net->ct.sysctl_checksum = 1;
net->ct.sysctl_log_invalid = 0;
ret = nf_conntrack_standalone_init_sysctl(net);
if (ret < 0)
goto out_sysctl;