mirror of
https://github.com/Fishwaldo/linux-bl808.git
synced 2025-03-19 13:34:07 +00:00
tcp: send packets with a socket timestamp
A socket timestamp is a sum of the global tcp_time_stamp and a per-socket offset. A socket offset is added in places where externally visible tcp timestamp option is parsed/initialized. Connections in the SYN_RECV state are not supported, global tcp_time_stamp is used for them, because repair mode doesn't support this state. In a future it can be implemented by the similar way as for TIME_WAIT sockets. Cc: "David S. Miller" <davem@davemloft.net> Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Cc: James Morris <jmorris@namei.org> Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> Cc: Patrick McHardy <kaber@trash.net> Cc: Eric Dumazet <edumazet@google.com> Cc: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: Andrey Vagin <avagin@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
parent
93be6ce0e9
commit
ee684b6f28
5 changed files with 30 additions and 17 deletions
|
@ -3860,7 +3860,7 @@ static bool tcp_parse_aligned_timestamp(struct tcp_sock *tp, const struct tcphdr
|
||||||
++ptr;
|
++ptr;
|
||||||
tp->rx_opt.rcv_tsval = ntohl(*ptr);
|
tp->rx_opt.rcv_tsval = ntohl(*ptr);
|
||||||
++ptr;
|
++ptr;
|
||||||
tp->rx_opt.rcv_tsecr = ntohl(*ptr);
|
tp->rx_opt.rcv_tsecr = ntohl(*ptr) - tp->tsoffset;
|
||||||
return true;
|
return true;
|
||||||
}
|
}
|
||||||
return false;
|
return false;
|
||||||
|
@ -3884,7 +3884,11 @@ static bool tcp_fast_parse_options(const struct sk_buff *skb,
|
||||||
if (tcp_parse_aligned_timestamp(tp, th))
|
if (tcp_parse_aligned_timestamp(tp, th))
|
||||||
return true;
|
return true;
|
||||||
}
|
}
|
||||||
|
|
||||||
tcp_parse_options(skb, &tp->rx_opt, hvpp, 1, NULL);
|
tcp_parse_options(skb, &tp->rx_opt, hvpp, 1, NULL);
|
||||||
|
if (tp->rx_opt.saw_tstamp)
|
||||||
|
tp->rx_opt.rcv_tsecr -= tp->tsoffset;
|
||||||
|
|
||||||
return true;
|
return true;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -5665,6 +5669,8 @@ static int tcp_rcv_synsent_state_process(struct sock *sk, struct sk_buff *skb,
|
||||||
int saved_clamp = tp->rx_opt.mss_clamp;
|
int saved_clamp = tp->rx_opt.mss_clamp;
|
||||||
|
|
||||||
tcp_parse_options(skb, &tp->rx_opt, &hash_location, 0, &foc);
|
tcp_parse_options(skb, &tp->rx_opt, &hash_location, 0, &foc);
|
||||||
|
if (tp->rx_opt.saw_tstamp)
|
||||||
|
tp->rx_opt.rcv_tsecr -= tp->tsoffset;
|
||||||
|
|
||||||
if (th->ack) {
|
if (th->ack) {
|
||||||
/* rfc793:
|
/* rfc793:
|
||||||
|
|
|
@ -726,7 +726,7 @@ release_sk1:
|
||||||
*/
|
*/
|
||||||
|
|
||||||
static void tcp_v4_send_ack(struct sk_buff *skb, u32 seq, u32 ack,
|
static void tcp_v4_send_ack(struct sk_buff *skb, u32 seq, u32 ack,
|
||||||
u32 win, u32 ts, int oif,
|
u32 win, u32 tsval, u32 tsecr, int oif,
|
||||||
struct tcp_md5sig_key *key,
|
struct tcp_md5sig_key *key,
|
||||||
int reply_flags, u8 tos)
|
int reply_flags, u8 tos)
|
||||||
{
|
{
|
||||||
|
@ -747,12 +747,12 @@ static void tcp_v4_send_ack(struct sk_buff *skb, u32 seq, u32 ack,
|
||||||
|
|
||||||
arg.iov[0].iov_base = (unsigned char *)&rep;
|
arg.iov[0].iov_base = (unsigned char *)&rep;
|
||||||
arg.iov[0].iov_len = sizeof(rep.th);
|
arg.iov[0].iov_len = sizeof(rep.th);
|
||||||
if (ts) {
|
if (tsecr) {
|
||||||
rep.opt[0] = htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) |
|
rep.opt[0] = htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) |
|
||||||
(TCPOPT_TIMESTAMP << 8) |
|
(TCPOPT_TIMESTAMP << 8) |
|
||||||
TCPOLEN_TIMESTAMP);
|
TCPOLEN_TIMESTAMP);
|
||||||
rep.opt[1] = htonl(tcp_time_stamp);
|
rep.opt[1] = htonl(tsval);
|
||||||
rep.opt[2] = htonl(ts);
|
rep.opt[2] = htonl(tsecr);
|
||||||
arg.iov[0].iov_len += TCPOLEN_TSTAMP_ALIGNED;
|
arg.iov[0].iov_len += TCPOLEN_TSTAMP_ALIGNED;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -767,7 +767,7 @@ static void tcp_v4_send_ack(struct sk_buff *skb, u32 seq, u32 ack,
|
||||||
|
|
||||||
#ifdef CONFIG_TCP_MD5SIG
|
#ifdef CONFIG_TCP_MD5SIG
|
||||||
if (key) {
|
if (key) {
|
||||||
int offset = (ts) ? 3 : 0;
|
int offset = (tsecr) ? 3 : 0;
|
||||||
|
|
||||||
rep.opt[offset++] = htonl((TCPOPT_NOP << 24) |
|
rep.opt[offset++] = htonl((TCPOPT_NOP << 24) |
|
||||||
(TCPOPT_NOP << 16) |
|
(TCPOPT_NOP << 16) |
|
||||||
|
@ -802,6 +802,7 @@ static void tcp_v4_timewait_ack(struct sock *sk, struct sk_buff *skb)
|
||||||
|
|
||||||
tcp_v4_send_ack(skb, tcptw->tw_snd_nxt, tcptw->tw_rcv_nxt,
|
tcp_v4_send_ack(skb, tcptw->tw_snd_nxt, tcptw->tw_rcv_nxt,
|
||||||
tcptw->tw_rcv_wnd >> tw->tw_rcv_wscale,
|
tcptw->tw_rcv_wnd >> tw->tw_rcv_wscale,
|
||||||
|
tcp_time_stamp + tcptw->tw_ts_offset,
|
||||||
tcptw->tw_ts_recent,
|
tcptw->tw_ts_recent,
|
||||||
tw->tw_bound_dev_if,
|
tw->tw_bound_dev_if,
|
||||||
tcp_twsk_md5_key(tcptw),
|
tcp_twsk_md5_key(tcptw),
|
||||||
|
@ -821,6 +822,7 @@ static void tcp_v4_reqsk_send_ack(struct sock *sk, struct sk_buff *skb,
|
||||||
tcp_v4_send_ack(skb, (sk->sk_state == TCP_LISTEN) ?
|
tcp_v4_send_ack(skb, (sk->sk_state == TCP_LISTEN) ?
|
||||||
tcp_rsk(req)->snt_isn + 1 : tcp_sk(sk)->snd_nxt,
|
tcp_rsk(req)->snt_isn + 1 : tcp_sk(sk)->snd_nxt,
|
||||||
tcp_rsk(req)->rcv_nxt, req->rcv_wnd,
|
tcp_rsk(req)->rcv_nxt, req->rcv_wnd,
|
||||||
|
tcp_time_stamp,
|
||||||
req->ts_recent,
|
req->ts_recent,
|
||||||
0,
|
0,
|
||||||
tcp_md5_do_lookup(sk, (union tcp_md5_addr *)&ip_hdr(skb)->daddr,
|
tcp_md5_do_lookup(sk, (union tcp_md5_addr *)&ip_hdr(skb)->daddr,
|
||||||
|
|
|
@ -102,6 +102,7 @@ tcp_timewait_state_process(struct inet_timewait_sock *tw, struct sk_buff *skb,
|
||||||
tcp_parse_options(skb, &tmp_opt, &hash_location, 0, NULL);
|
tcp_parse_options(skb, &tmp_opt, &hash_location, 0, NULL);
|
||||||
|
|
||||||
if (tmp_opt.saw_tstamp) {
|
if (tmp_opt.saw_tstamp) {
|
||||||
|
tmp_opt.rcv_tsecr -= tcptw->tw_ts_offset;
|
||||||
tmp_opt.ts_recent = tcptw->tw_ts_recent;
|
tmp_opt.ts_recent = tcptw->tw_ts_recent;
|
||||||
tmp_opt.ts_recent_stamp = tcptw->tw_ts_recent_stamp;
|
tmp_opt.ts_recent_stamp = tcptw->tw_ts_recent_stamp;
|
||||||
paws_reject = tcp_paws_reject(&tmp_opt, th->rst);
|
paws_reject = tcp_paws_reject(&tmp_opt, th->rst);
|
||||||
|
|
|
@ -622,7 +622,7 @@ static unsigned int tcp_syn_options(struct sock *sk, struct sk_buff *skb,
|
||||||
|
|
||||||
if (likely(sysctl_tcp_timestamps && *md5 == NULL)) {
|
if (likely(sysctl_tcp_timestamps && *md5 == NULL)) {
|
||||||
opts->options |= OPTION_TS;
|
opts->options |= OPTION_TS;
|
||||||
opts->tsval = TCP_SKB_CB(skb)->when;
|
opts->tsval = TCP_SKB_CB(skb)->when + tp->tsoffset;
|
||||||
opts->tsecr = tp->rx_opt.ts_recent;
|
opts->tsecr = tp->rx_opt.ts_recent;
|
||||||
remaining -= TCPOLEN_TSTAMP_ALIGNED;
|
remaining -= TCPOLEN_TSTAMP_ALIGNED;
|
||||||
}
|
}
|
||||||
|
@ -806,7 +806,7 @@ static unsigned int tcp_established_options(struct sock *sk, struct sk_buff *skb
|
||||||
|
|
||||||
if (likely(tp->rx_opt.tstamp_ok)) {
|
if (likely(tp->rx_opt.tstamp_ok)) {
|
||||||
opts->options |= OPTION_TS;
|
opts->options |= OPTION_TS;
|
||||||
opts->tsval = tcb ? tcb->when : 0;
|
opts->tsval = tcb ? tcb->when + tp->tsoffset : 0;
|
||||||
opts->tsecr = tp->rx_opt.ts_recent;
|
opts->tsecr = tp->rx_opt.ts_recent;
|
||||||
size += TCPOLEN_TSTAMP_ALIGNED;
|
size += TCPOLEN_TSTAMP_ALIGNED;
|
||||||
}
|
}
|
||||||
|
|
|
@ -713,7 +713,8 @@ static const struct tcp_request_sock_ops tcp_request_sock_ipv6_ops = {
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
|
static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
|
||||||
u32 ts, struct tcp_md5sig_key *key, int rst, u8 tclass)
|
u32 tsval, u32 tsecr,
|
||||||
|
struct tcp_md5sig_key *key, int rst, u8 tclass)
|
||||||
{
|
{
|
||||||
const struct tcphdr *th = tcp_hdr(skb);
|
const struct tcphdr *th = tcp_hdr(skb);
|
||||||
struct tcphdr *t1;
|
struct tcphdr *t1;
|
||||||
|
@ -725,7 +726,7 @@ static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
|
||||||
struct dst_entry *dst;
|
struct dst_entry *dst;
|
||||||
__be32 *topt;
|
__be32 *topt;
|
||||||
|
|
||||||
if (ts)
|
if (tsecr)
|
||||||
tot_len += TCPOLEN_TSTAMP_ALIGNED;
|
tot_len += TCPOLEN_TSTAMP_ALIGNED;
|
||||||
#ifdef CONFIG_TCP_MD5SIG
|
#ifdef CONFIG_TCP_MD5SIG
|
||||||
if (key)
|
if (key)
|
||||||
|
@ -755,11 +756,11 @@ static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
|
||||||
|
|
||||||
topt = (__be32 *)(t1 + 1);
|
topt = (__be32 *)(t1 + 1);
|
||||||
|
|
||||||
if (ts) {
|
if (tsecr) {
|
||||||
*topt++ = htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) |
|
*topt++ = htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) |
|
||||||
(TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP);
|
(TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP);
|
||||||
*topt++ = htonl(tcp_time_stamp);
|
*topt++ = htonl(tsval);
|
||||||
*topt++ = htonl(ts);
|
*topt++ = htonl(tsecr);
|
||||||
}
|
}
|
||||||
|
|
||||||
#ifdef CONFIG_TCP_MD5SIG
|
#ifdef CONFIG_TCP_MD5SIG
|
||||||
|
@ -860,7 +861,7 @@ static void tcp_v6_send_reset(struct sock *sk, struct sk_buff *skb)
|
||||||
ack_seq = ntohl(th->seq) + th->syn + th->fin + skb->len -
|
ack_seq = ntohl(th->seq) + th->syn + th->fin + skb->len -
|
||||||
(th->doff << 2);
|
(th->doff << 2);
|
||||||
|
|
||||||
tcp_v6_send_response(skb, seq, ack_seq, 0, 0, key, 1, 0);
|
tcp_v6_send_response(skb, seq, ack_seq, 0, 0, 0, key, 1, 0);
|
||||||
|
|
||||||
#ifdef CONFIG_TCP_MD5SIG
|
#ifdef CONFIG_TCP_MD5SIG
|
||||||
release_sk1:
|
release_sk1:
|
||||||
|
@ -871,10 +872,11 @@ release_sk1:
|
||||||
#endif
|
#endif
|
||||||
}
|
}
|
||||||
|
|
||||||
static void tcp_v6_send_ack(struct sk_buff *skb, u32 seq, u32 ack, u32 win, u32 ts,
|
static void tcp_v6_send_ack(struct sk_buff *skb, u32 seq, u32 ack,
|
||||||
|
u32 win, u32 tsval, u32 tsecr,
|
||||||
struct tcp_md5sig_key *key, u8 tclass)
|
struct tcp_md5sig_key *key, u8 tclass)
|
||||||
{
|
{
|
||||||
tcp_v6_send_response(skb, seq, ack, win, ts, key, 0, tclass);
|
tcp_v6_send_response(skb, seq, ack, win, tsval, tsecr, key, 0, tclass);
|
||||||
}
|
}
|
||||||
|
|
||||||
static void tcp_v6_timewait_ack(struct sock *sk, struct sk_buff *skb)
|
static void tcp_v6_timewait_ack(struct sock *sk, struct sk_buff *skb)
|
||||||
|
@ -884,6 +886,7 @@ static void tcp_v6_timewait_ack(struct sock *sk, struct sk_buff *skb)
|
||||||
|
|
||||||
tcp_v6_send_ack(skb, tcptw->tw_snd_nxt, tcptw->tw_rcv_nxt,
|
tcp_v6_send_ack(skb, tcptw->tw_snd_nxt, tcptw->tw_rcv_nxt,
|
||||||
tcptw->tw_rcv_wnd >> tw->tw_rcv_wscale,
|
tcptw->tw_rcv_wnd >> tw->tw_rcv_wscale,
|
||||||
|
tcp_time_stamp + tcptw->tw_ts_offset,
|
||||||
tcptw->tw_ts_recent, tcp_twsk_md5_key(tcptw),
|
tcptw->tw_ts_recent, tcp_twsk_md5_key(tcptw),
|
||||||
tw->tw_tclass);
|
tw->tw_tclass);
|
||||||
|
|
||||||
|
@ -893,7 +896,8 @@ static void tcp_v6_timewait_ack(struct sock *sk, struct sk_buff *skb)
|
||||||
static void tcp_v6_reqsk_send_ack(struct sock *sk, struct sk_buff *skb,
|
static void tcp_v6_reqsk_send_ack(struct sock *sk, struct sk_buff *skb,
|
||||||
struct request_sock *req)
|
struct request_sock *req)
|
||||||
{
|
{
|
||||||
tcp_v6_send_ack(skb, tcp_rsk(req)->snt_isn + 1, tcp_rsk(req)->rcv_isn + 1, req->rcv_wnd, req->ts_recent,
|
tcp_v6_send_ack(skb, tcp_rsk(req)->snt_isn + 1, tcp_rsk(req)->rcv_isn + 1,
|
||||||
|
req->rcv_wnd, tcp_time_stamp, req->ts_recent,
|
||||||
tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->daddr), 0);
|
tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->daddr), 0);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
Loading…
Add table
Reference in a new issue