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Diffstat (limited to 'net/netfilter/nf_conntrack_proto_tcp.c')
-rw-r--r--net/netfilter/nf_conntrack_proto_tcp.c96
1 files changed, 41 insertions, 55 deletions
diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c
index 7a3f64c1aca..64c9b910419 100644
--- a/net/netfilter/nf_conntrack_proto_tcp.c
+++ b/net/netfilter/nf_conntrack_proto_tcp.c
@@ -24,6 +24,7 @@
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_ecache.h>
+#include <net/netfilter/nf_log.h>
/* Protects conntrack->proto.tcp */
static DEFINE_RWLOCK(tcp_lock);
@@ -63,32 +64,21 @@ static const char *tcp_conntrack_names[] = {
#define HOURS * 60 MINS
#define DAYS * 24 HOURS
-static unsigned int nf_ct_tcp_timeout_syn_sent __read_mostly = 2 MINS;
-static unsigned int nf_ct_tcp_timeout_syn_recv __read_mostly = 60 SECS;
-static unsigned int nf_ct_tcp_timeout_established __read_mostly = 5 DAYS;
-static unsigned int nf_ct_tcp_timeout_fin_wait __read_mostly = 2 MINS;
-static unsigned int nf_ct_tcp_timeout_close_wait __read_mostly = 60 SECS;
-static unsigned int nf_ct_tcp_timeout_last_ack __read_mostly = 30 SECS;
-static unsigned int nf_ct_tcp_timeout_time_wait __read_mostly = 2 MINS;
-static unsigned int nf_ct_tcp_timeout_close __read_mostly = 10 SECS;
-
/* RFC1122 says the R2 limit should be at least 100 seconds.
Linux uses 15 packets as limit, which corresponds
to ~13-30min depending on RTO. */
static unsigned int nf_ct_tcp_timeout_max_retrans __read_mostly = 5 MINS;
-static unsigned int * tcp_timeouts[] = {
- NULL, /* TCP_CONNTRACK_NONE */
- &nf_ct_tcp_timeout_syn_sent, /* TCP_CONNTRACK_SYN_SENT, */
- &nf_ct_tcp_timeout_syn_recv, /* TCP_CONNTRACK_SYN_RECV, */
- &nf_ct_tcp_timeout_established, /* TCP_CONNTRACK_ESTABLISHED, */
- &nf_ct_tcp_timeout_fin_wait, /* TCP_CONNTRACK_FIN_WAIT, */
- &nf_ct_tcp_timeout_close_wait, /* TCP_CONNTRACK_CLOSE_WAIT, */
- &nf_ct_tcp_timeout_last_ack, /* TCP_CONNTRACK_LAST_ACK, */
- &nf_ct_tcp_timeout_time_wait, /* TCP_CONNTRACK_TIME_WAIT, */
- &nf_ct_tcp_timeout_close, /* TCP_CONNTRACK_CLOSE, */
- NULL, /* TCP_CONNTRACK_LISTEN */
- };
+static unsigned int tcp_timeouts[TCP_CONNTRACK_MAX] __read_mostly = {
+ [TCP_CONNTRACK_SYN_SENT] = 2 MINS,
+ [TCP_CONNTRACK_SYN_RECV] = 60 SECS,
+ [TCP_CONNTRACK_ESTABLISHED] = 5 DAYS,
+ [TCP_CONNTRACK_FIN_WAIT] = 2 MINS,
+ [TCP_CONNTRACK_CLOSE_WAIT] = 60 SECS,
+ [TCP_CONNTRACK_LAST_ACK] = 30 SECS,
+ [TCP_CONNTRACK_TIME_WAIT] = 2 MINS,
+ [TCP_CONNTRACK_CLOSE] = 10 SECS,
+};
#define sNO TCP_CONNTRACK_NONE
#define sSS TCP_CONNTRACK_SYN_SENT
@@ -148,7 +138,7 @@ enum tcp_bit_set {
* if they are invalid
* or we do not support the request (simultaneous open)
*/
-static enum tcp_conntrack tcp_conntracks[2][6][TCP_CONNTRACK_MAX] = {
+static const u8 tcp_conntracks[2][6][TCP_CONNTRACK_MAX] = {
{
/* ORIGINAL */
/* sNO, sSS, sSR, sES, sFW, sCW, sLA, sTW, sCL, sLI */
@@ -783,9 +773,7 @@ static int tcp_error(struct sk_buff *skb,
* because the checksum is assumed to be correct.
*/
/* FIXME: Source route IP option packets --RR */
- if (nf_conntrack_checksum &&
- ((pf == PF_INET && hooknum == NF_IP_PRE_ROUTING) ||
- (pf == PF_INET6 && hooknum == NF_IP6_PRE_ROUTING)) &&
+ if (nf_conntrack_checksum && hooknum == NF_INET_PRE_ROUTING &&
nf_checksum(skb, hooknum, dataoff, IPPROTO_TCP, pf)) {
if (LOG_INVALID(IPPROTO_TCP))
nf_log_packet(pf, 0, skb, NULL, NULL, NULL,
@@ -942,8 +930,8 @@ static int tcp_packet(struct nf_conn *conntrack,
|| new_state == TCP_CONNTRACK_CLOSE))
conntrack->proto.tcp.seen[dir].flags |= IP_CT_TCP_FLAG_CLOSE_INIT;
timeout = conntrack->proto.tcp.retrans >= nf_ct_tcp_max_retrans
- && *tcp_timeouts[new_state] > nf_ct_tcp_timeout_max_retrans
- ? nf_ct_tcp_timeout_max_retrans : *tcp_timeouts[new_state];
+ && tcp_timeouts[new_state] > nf_ct_tcp_timeout_max_retrans
+ ? nf_ct_tcp_timeout_max_retrans : tcp_timeouts[new_state];
write_unlock_bh(&tcp_lock);
nf_conntrack_event_cache(IPCT_PROTOINFO_VOLATILE, skb);
@@ -1074,14 +1062,13 @@ static int tcp_to_nlattr(struct sk_buff *skb, struct nlattr *nla,
if (!nest_parms)
goto nla_put_failure;
- NLA_PUT(skb, CTA_PROTOINFO_TCP_STATE, sizeof(u_int8_t),
- &ct->proto.tcp.state);
+ NLA_PUT_U8(skb, CTA_PROTOINFO_TCP_STATE, ct->proto.tcp.state);
- NLA_PUT(skb, CTA_PROTOINFO_TCP_WSCALE_ORIGINAL, sizeof(u_int8_t),
- &ct->proto.tcp.seen[0].td_scale);
+ NLA_PUT_U8(skb, CTA_PROTOINFO_TCP_WSCALE_ORIGINAL,
+ ct->proto.tcp.seen[0].td_scale);
- NLA_PUT(skb, CTA_PROTOINFO_TCP_WSCALE_REPLY, sizeof(u_int8_t),
- &ct->proto.tcp.seen[1].td_scale);
+ NLA_PUT_U8(skb, CTA_PROTOINFO_TCP_WSCALE_REPLY,
+ ct->proto.tcp.seen[1].td_scale);
tmp.flags = ct->proto.tcp.seen[0].flags;
NLA_PUT(skb, CTA_PROTOINFO_TCP_FLAGS_ORIGINAL,
@@ -1128,8 +1115,7 @@ static int nlattr_to_tcp(struct nlattr *cda[], struct nf_conn *ct)
return -EINVAL;
write_lock_bh(&tcp_lock);
- ct->proto.tcp.state =
- *(u_int8_t *)nla_data(tb[CTA_PROTOINFO_TCP_STATE]);
+ ct->proto.tcp.state = nla_get_u8(tb[CTA_PROTOINFO_TCP_STATE]);
if (tb[CTA_PROTOINFO_TCP_FLAGS_ORIGINAL]) {
struct nf_ct_tcp_flags *attr =
@@ -1149,10 +1135,10 @@ static int nlattr_to_tcp(struct nlattr *cda[], struct nf_conn *ct)
tb[CTA_PROTOINFO_TCP_WSCALE_REPLY] &&
ct->proto.tcp.seen[0].flags & IP_CT_TCP_FLAG_WINDOW_SCALE &&
ct->proto.tcp.seen[1].flags & IP_CT_TCP_FLAG_WINDOW_SCALE) {
- ct->proto.tcp.seen[0].td_scale = *(u_int8_t *)
- nla_data(tb[CTA_PROTOINFO_TCP_WSCALE_ORIGINAL]);
- ct->proto.tcp.seen[1].td_scale = *(u_int8_t *)
- nla_data(tb[CTA_PROTOINFO_TCP_WSCALE_REPLY]);
+ ct->proto.tcp.seen[0].td_scale =
+ nla_get_u8(tb[CTA_PROTOINFO_TCP_WSCALE_ORIGINAL]);
+ ct->proto.tcp.seen[1].td_scale =
+ nla_get_u8(tb[CTA_PROTOINFO_TCP_WSCALE_REPLY]);
}
write_unlock_bh(&tcp_lock);
@@ -1166,56 +1152,56 @@ static struct ctl_table_header *tcp_sysctl_header;
static struct ctl_table tcp_sysctl_table[] = {
{
.procname = "nf_conntrack_tcp_timeout_syn_sent",
- .data = &nf_ct_tcp_timeout_syn_sent,
+ .data = &tcp_timeouts[TCP_CONNTRACK_SYN_SENT],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
},
{
.procname = "nf_conntrack_tcp_timeout_syn_recv",
- .data = &nf_ct_tcp_timeout_syn_recv,
+ .data = &tcp_timeouts[TCP_CONNTRACK_SYN_RECV],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
},
{
.procname = "nf_conntrack_tcp_timeout_established",
- .data = &nf_ct_tcp_timeout_established,
+ .data = &tcp_timeouts[TCP_CONNTRACK_ESTABLISHED],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
},
{
.procname = "nf_conntrack_tcp_timeout_fin_wait",
- .data = &nf_ct_tcp_timeout_fin_wait,
+ .data = &tcp_timeouts[TCP_CONNTRACK_FIN_WAIT],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
},
{
.procname = "nf_conntrack_tcp_timeout_close_wait",
- .data = &nf_ct_tcp_timeout_close_wait,
+ .data = &tcp_timeouts[TCP_CONNTRACK_CLOSE_WAIT],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
},
{
.procname = "nf_conntrack_tcp_timeout_last_ack",
- .data = &nf_ct_tcp_timeout_last_ack,
+ .data = &tcp_timeouts[TCP_CONNTRACK_LAST_ACK],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
},
{
.procname = "nf_conntrack_tcp_timeout_time_wait",
- .data = &nf_ct_tcp_timeout_time_wait,
+ .data = &tcp_timeouts[TCP_CONNTRACK_TIME_WAIT],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
},
{
.procname = "nf_conntrack_tcp_timeout_close",
- .data = &nf_ct_tcp_timeout_close,
+ .data = &tcp_timeouts[TCP_CONNTRACK_CLOSE],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
@@ -1260,56 +1246,56 @@ static struct ctl_table tcp_sysctl_table[] = {
static struct ctl_table tcp_compat_sysctl_table[] = {
{
.procname = "ip_conntrack_tcp_timeout_syn_sent",
- .data = &nf_ct_tcp_timeout_syn_sent,
+ .data = &tcp_timeouts[TCP_CONNTRACK_SYN_SENT],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
},
{
.procname = "ip_conntrack_tcp_timeout_syn_recv",
- .data = &nf_ct_tcp_timeout_syn_recv,
+ .data = &tcp_timeouts[TCP_CONNTRACK_SYN_RECV],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
},
{
.procname = "ip_conntrack_tcp_timeout_established",
- .data = &nf_ct_tcp_timeout_established,
+ .data = &tcp_timeouts[TCP_CONNTRACK_ESTABLISHED],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
},
{
.procname = "ip_conntrack_tcp_timeout_fin_wait",
- .data = &nf_ct_tcp_timeout_fin_wait,
+ .data = &tcp_timeouts[TCP_CONNTRACK_FIN_WAIT],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
},
{
.procname = "ip_conntrack_tcp_timeout_close_wait",
- .data = &nf_ct_tcp_timeout_close_wait,
+ .data = &tcp_timeouts[TCP_CONNTRACK_CLOSE_WAIT],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
},
{
.procname = "ip_conntrack_tcp_timeout_last_ack",
- .data = &nf_ct_tcp_timeout_last_ack,
+ .data = &tcp_timeouts[TCP_CONNTRACK_LAST_ACK],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
},
{
.procname = "ip_conntrack_tcp_timeout_time_wait",
- .data = &nf_ct_tcp_timeout_time_wait,
+ .data = &tcp_timeouts[TCP_CONNTRACK_TIME_WAIT],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
},
{
.procname = "ip_conntrack_tcp_timeout_close",
- .data = &nf_ct_tcp_timeout_close,
+ .data = &tcp_timeouts[TCP_CONNTRACK_CLOSE],
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-16 04:03:51 +0000