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-rw-r--r--include/linux/dccp.h4
-rw-r--r--include/linux/ip.h1
-rw-r--r--include/linux/tcp.h3
-rw-r--r--include/net/inet_connection_sock.h6
-rw-r--r--include/net/protocol.h1
-rw-r--r--net/dccp/diag.c2
-rw-r--r--net/dccp/input.c2
-rw-r--r--net/dccp/ipv4.c12
-rw-r--r--net/dccp/ipv6.c26
-rw-r--r--net/dccp/output.c7
-rw-r--r--net/dccp/proto.c2
-rw-r--r--net/ipv4/af_inet.c4
-rw-r--r--net/ipv4/ip_sockglue.c13
-rw-r--r--net/ipv4/tcp.c2
-rw-r--r--net/ipv4/tcp_input.c10
-rw-r--r--net/ipv4/tcp_ipv4.c12
-rw-r--r--net/ipv4/tcp_output.c18
-rw-r--r--net/ipv6/af_inet6.c1
-rw-r--r--net/ipv6/ipv6_sockglue.c24
-rw-r--r--net/ipv6/tcp_ipv6.c30
20 files changed, 97 insertions, 83 deletions
diff --git a/include/linux/dccp.h b/include/linux/dccp.h
index 71fab4311e92..d0bdb499cf8d 100644
--- a/include/linux/dccp.h
+++ b/include/linux/dccp.h
@@ -408,8 +408,6 @@ struct dccp_ackvec;
* @dccps_gar - greatest valid ack number received on a non-Sync; initialized to %dccps_iss
* @dccps_timestamp_time - time of latest TIMESTAMP option
* @dccps_timestamp_echo - latest timestamp received on a TIMESTAMP option
- * @dccps_ext_header_len - network protocol overhead (IP/IPv6 options)
- * @dccps_pmtu_cookie - Last pmtu seen by socket
* @dccps_packet_size - Set thru setsockopt
* @dccps_role - Role of this sock, one of %dccp_role
* @dccps_ndp_count - number of Non Data Packets since last data packet
@@ -434,8 +432,6 @@ struct dccp_sock {
__u32 dccps_timestamp_echo;
__u32 dccps_packet_size;
unsigned long dccps_ndp_count;
- __u16 dccps_ext_header_len;
- __u32 dccps_pmtu_cookie;
__u32 dccps_mss_cache;
struct dccp_options dccps_options;
struct dccp_ackvec *dccps_hc_rx_ackvec;
diff --git a/include/linux/ip.h b/include/linux/ip.h
index 5a560daeade5..6ccc596c19c8 100644
--- a/include/linux/ip.h
+++ b/include/linux/ip.h
@@ -155,6 +155,7 @@ struct inet_sock {
__u8 mc_ttl; /* Multicasting TTL */
__u8 pmtudisc;
unsigned recverr : 1,
+ is_icsk : 1, /* inet_connection_sock? */
freebind : 1,
hdrincl : 1,
mc_loop : 1;
diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index da38eea1994b..f2bb2396853f 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -238,10 +238,9 @@ struct tcp_sock {
__u32 snd_wl1; /* Sequence for window update */
__u32 snd_wnd; /* The window we expect to receive */
__u32 max_window; /* Maximal window ever seen from peer */
- __u32 pmtu_cookie; /* Last pmtu seen by socket */
__u32 mss_cache; /* Cached effective mss, not including SACKS */
__u16 xmit_size_goal; /* Goal for segmenting output packets */
- __u16 ext_header_len; /* Network protocol overhead (IP/IPv6 options) */
+ /* XXX Two bytes hole, try to pack */
__u32 window_clamp; /* Maximal window to advertise */
__u32 rcv_ssthresh; /* Current window clamp */
diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h
index e50e2b890c6d..91888967d3e3 100644
--- a/include/net/inet_connection_sock.h
+++ b/include/net/inet_connection_sock.h
@@ -60,6 +60,7 @@ struct inet_connection_sock_af_ops {
* @icsk_timeout: Timeout
* @icsk_retransmit_timer: Resend (no ack)
* @icsk_rto: Retransmit timeout
+ * @icsk_pmtu_cookie Last pmtu seen by socket
* @icsk_ca_ops Pluggable congestion control hook
* @icsk_af_ops Operations which are AF_INET{4,6} specific
* @icsk_ca_state: Congestion control state
@@ -68,6 +69,7 @@ struct inet_connection_sock_af_ops {
* @icsk_backoff: Backoff
* @icsk_syn_retries: Number of allowed SYN (or equivalent) retries
* @icsk_probes_out: unanswered 0 window probes
+ * @icsk_ext_hdr_len: Network protocol overhead (IP/IPv6 options)
* @icsk_ack: Delayed ACK control data
*/
struct inet_connection_sock {
@@ -79,15 +81,17 @@ struct inet_connection_sock {
struct timer_list icsk_retransmit_timer;
struct timer_list icsk_delack_timer;
__u32 icsk_rto;
+ __u32 icsk_pmtu_cookie;
struct tcp_congestion_ops *icsk_ca_ops;
struct inet_connection_sock_af_ops *icsk_af_ops;
+ unsigned int (*icsk_sync_mss)(struct sock *sk, u32 pmtu);
__u8 icsk_ca_state;
__u8 icsk_retransmits;
__u8 icsk_pending;
__u8 icsk_backoff;
__u8 icsk_syn_retries;
__u8 icsk_probes_out;
- /* 2 BYTES HOLE, TRY TO PACK! */
+ __u16 icsk_ext_hdr_len;
struct {
__u8 pending; /* ACK is pending */
__u8 quick; /* Scheduled number of quick acks */
diff --git a/include/net/protocol.h b/include/net/protocol.h
index 357691f6a45f..a29cb29647d0 100644
--- a/include/net/protocol.h
+++ b/include/net/protocol.h
@@ -76,6 +76,7 @@ struct inet_protosw {
};
#define INET_PROTOSW_REUSE 0x01 /* Are ports automatically reusable? */
#define INET_PROTOSW_PERMANENT 0x02 /* Permanent protocols are unremovable. */
+#define INET_PROTOSW_ICSK 0x04 /* Is this an inet_connection_sock? */
extern struct net_protocol *inet_protocol_base;
extern struct net_protocol *inet_protos[MAX_INET_PROTOS];
diff --git a/net/dccp/diag.c b/net/dccp/diag.c
index f675d8e642d3..3f78c00e3822 100644
--- a/net/dccp/diag.c
+++ b/net/dccp/diag.c
@@ -28,7 +28,7 @@ static void dccp_get_info(struct sock *sk, struct tcp_info *info)
info->tcpi_retransmits = icsk->icsk_retransmits;
info->tcpi_probes = icsk->icsk_probes_out;
info->tcpi_backoff = icsk->icsk_backoff;
- info->tcpi_pmtu = dp->dccps_pmtu_cookie;
+ info->tcpi_pmtu = icsk->icsk_pmtu_cookie;
if (dp->dccps_options.dccpo_send_ack_vector)
info->tcpi_options |= TCPI_OPT_SACK;
diff --git a/net/dccp/input.c b/net/dccp/input.c
index 9a724ff2a622..55e921bdd131 100644
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -311,7 +311,7 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk,
goto out_invalid_packet;
}
- dccp_sync_mss(sk, dp->dccps_pmtu_cookie);
+ dccp_sync_mss(sk, icsk->icsk_pmtu_cookie);
/*
* Step 10: Process REQUEST state (second part)
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index 671fbf3b2379..c363051a7f16 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -104,9 +104,9 @@ int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
inet->dport = usin->sin_port;
inet->daddr = daddr;
- dp->dccps_ext_header_len = 0;
+ inet_csk(sk)->icsk_ext_hdr_len = 0;
if (inet->opt != NULL)
- dp->dccps_ext_header_len = inet->opt->optlen;
+ inet_csk(sk)->icsk_ext_hdr_len = inet->opt->optlen;
/*
* Socket identity is still unknown (sport may be zero).
* However we set state to DCCP_REQUESTING and not releasing socket
@@ -191,7 +191,7 @@ static inline void dccp_do_pmtu_discovery(struct sock *sk,
mtu = dst_mtu(dst);
if (inet->pmtudisc != IP_PMTUDISC_DONT &&
- dp->dccps_pmtu_cookie > mtu) {
+ inet_csk(sk)->icsk_pmtu_cookie > mtu) {
dccp_sync_mss(sk, mtu);
/*
@@ -1051,6 +1051,7 @@ struct inet_connection_sock_af_ops dccp_ipv4_af_ops = {
int dccp_v4_init_sock(struct sock *sk)
{
struct dccp_sock *dp = dccp_sk(sk);
+ struct inet_connection_sock *icsk = inet_csk(sk);
static int dccp_ctl_socket_init = 1;
dccp_options_init(&dp->dccps_options);
@@ -1090,10 +1091,11 @@ int dccp_v4_init_sock(struct sock *sk)
dccp_ctl_socket_init = 0;
dccp_init_xmit_timers(sk);
- inet_csk(sk)->icsk_rto = DCCP_TIMEOUT_INIT;
+ icsk->icsk_rto = DCCP_TIMEOUT_INIT;
sk->sk_state = DCCP_CLOSED;
sk->sk_write_space = dccp_write_space;
- inet_csk(sk)->icsk_af_ops = &dccp_ipv4_af_ops;
+ icsk->icsk_af_ops = &dccp_ipv4_af_ops;
+ icsk->icsk_sync_mss = dccp_sync_mss;
dp->dccps_mss_cache = 536;
dp->dccps_role = DCCP_ROLE_UNDEFINED;
dp->dccps_service = DCCP_SERVICE_INVALID_VALUE;
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index 71bf04eb21e1..599b0be21515 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -88,6 +88,7 @@ static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
int addr_len)
{
struct sockaddr_in6 *usin = (struct sockaddr_in6 *) uaddr;
+ struct inet_connection_sock *icsk = inet_csk(sk);
struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
struct dccp_sock *dp = dccp_sk(sk);
@@ -158,7 +159,7 @@ static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
*/
if (addr_type == IPV6_ADDR_MAPPED) {
- u32 exthdrlen = dp->dccps_ext_header_len;
+ u32 exthdrlen = icsk->icsk_ext_hdr_len;
struct sockaddr_in sin;
SOCK_DEBUG(sk, "connect: ipv4 mapped\n");
@@ -170,14 +171,14 @@ static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
sin.sin_port = usin->sin6_port;
sin.sin_addr.s_addr = usin->sin6_addr.s6_addr32[3];
- inet_csk(sk)->icsk_af_ops = &dccp_ipv6_mapped;
+ icsk->icsk_af_ops = &dccp_ipv6_mapped;
sk->sk_backlog_rcv = dccp_v4_do_rcv;
err = dccp_v4_connect(sk, (struct sockaddr *)&sin, sizeof(sin));
if (err) {
- dp->dccps_ext_header_len = exthdrlen;
- inet_csk(sk)->icsk_af_ops = &dccp_ipv6_af_ops;
+ icsk->icsk_ext_hdr_len = exthdrlen;
+ icsk->icsk_af_ops = &dccp_ipv6_af_ops;
sk->sk_backlog_rcv = dccp_v6_do_rcv;
goto failure;
} else {
@@ -227,9 +228,10 @@ static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
ip6_dst_store(sk, dst, NULL);
- dp->dccps_ext_header_len = 0;
+ icsk->icsk_ext_hdr_len = 0;
if (np->opt)
- dp->dccps_ext_header_len = np->opt->opt_flen + np->opt->opt_nflen;
+ icsk->icsk_ext_hdr_len = (np->opt->opt_flen +
+ np->opt->opt_nflen);
inet->dport = usin->sin6_port;
@@ -292,7 +294,6 @@ static void dccp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
np = inet6_sk(sk);
if (type == ICMPV6_PKT_TOOBIG) {
- struct dccp_sock *dp = dccp_sk(sk);
struct dst_entry *dst = NULL;
if (sock_owned_by_user(sk))
@@ -332,7 +333,7 @@ static void dccp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
} else
dst_hold(dst);
- if (dp->dccps_pmtu_cookie > dst_mtu(dst)) {
+ if (inet_csk(sk)->icsk_pmtu_cookie > dst_mtu(dst)) {
dccp_sync_mss(sk, dst_mtu(dst));
} /* else let the usual retransmit timer handle it */
dst_release(dst);
@@ -808,7 +809,7 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk,
worked with IPv6 icsk.icsk_af_ops.
Sync it now.
*/
- dccp_sync_mss(newsk, newdp->dccps_pmtu_cookie);
+ dccp_sync_mss(newsk, inet_csk(newsk)->icsk_pmtu_cookie);
return newsk;
}
@@ -916,10 +917,10 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk,
sock_kfree_s(sk, opt, opt->tot_len);
}
- newdp->dccps_ext_header_len = 0;
+ inet_csk(newsk)->icsk_ext_hdr_len = 0;
if (newnp->opt)
- newdp->dccps_ext_header_len = newnp->opt->opt_nflen +
- newnp->opt->opt_flen;
+ inet_csk(newsk)->icsk_ext_hdr_len = (newnp->opt->opt_nflen +
+ newnp->opt->opt_flen);
dccp_sync_mss(newsk, dst_mtu(dst));
@@ -1230,6 +1231,7 @@ static struct inet_protosw dccp_v6_protosw = {
.prot = &dccp_v6_prot,
.ops = &inet6_dccp_ops,
.capability = -1,
+ .flags = INET_PROTOSW_ICSK,
};
static int __init dccp_v6_init(void)
diff --git a/net/dccp/output.c b/net/dccp/output.c
index c40f7f8a328b..95a3c2c6a3ce 100644
--- a/net/dccp/output.c
+++ b/net/dccp/output.c
@@ -134,12 +134,13 @@ static int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb)
unsigned int dccp_sync_mss(struct sock *sk, u32 pmtu)
{
+ struct inet_connection_sock *icsk = inet_csk(sk);
struct dccp_sock *dp = dccp_sk(sk);
- int mss_now = (pmtu - inet_csk(sk)->icsk_af_ops->net_header_len -
+ int mss_now = (pmtu - icsk->icsk_af_ops->net_header_len -
sizeof(struct dccp_hdr) - sizeof(struct dccp_hdr_ext));
/* Now subtract optional transport overhead */
- mss_now -= dp->dccps_ext_header_len;
+ mss_now -= icsk->icsk_ext_hdr_len;
/*
* FIXME: this should come from the CCID infrastructure, where, say,
@@ -152,7 +153,7 @@ unsigned int dccp_sync_mss(struct sock *sk, u32 pmtu)
mss_now -= ((5 + 6 + 10 + 6 + 6 + 6 + 3) / 4) * 4;
/* And store cached results */
- dp->dccps_pmtu_cookie = pmtu;
+ icsk->icsk_pmtu_cookie = pmtu;
dp->dccps_mss_cache = mss_now;
return mss_now;
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index 51dfacd22a6e..40a4c6899051 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -712,7 +712,7 @@ static struct inet_protosw dccp_v4_protosw = {
.ops = &inet_dccp_ops,
.capability = -1,
.no_check = 0,
- .flags = 0,
+ .flags = INET_PROTOSW_ICSK,
};
/*
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index d368cf249000..617e858beff1 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -302,6 +302,7 @@ lookup_protocol:
sk->sk_reuse = 1;
inet = inet_sk(sk);
+ inet->is_icsk = INET_PROTOSW_ICSK & answer_flags;
if (SOCK_RAW == sock->type) {
inet->num = protocol;
@@ -869,7 +870,8 @@ static struct inet_protosw inetsw_array[] =
.ops = &inet_stream_ops,
.capability = -1,
.no_check = 0,
- .flags = INET_PROTOSW_PERMANENT,
+ .flags = INET_PROTOSW_PERMANENT |
+ INET_PROTOSW_ICSK,
},
{
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index 4f2d87257309..add019c746f8 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -29,8 +29,7 @@
#include <net/sock.h>
#include <net/ip.h>
#include <net/icmp.h>
-#include <net/tcp.h>
-#include <linux/tcp.h>
+#include <net/tcp_states.h>
#include <linux/udp.h>
#include <linux/igmp.h>
#include <linux/netfilter.h>
@@ -427,8 +426,8 @@ int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
err = ip_options_get_from_user(&opt, optval, optlen);
if (err)
break;
- if (sk->sk_type == SOCK_STREAM) {
- struct tcp_sock *tp = tcp_sk(sk);
+ if (inet->is_icsk) {
+ struct inet_connection_sock *icsk = inet_csk(sk);
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
if (sk->sk_family == PF_INET ||
(!((1 << sk->sk_state) &
@@ -436,10 +435,10 @@ int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
inet->daddr != LOOPBACK4_IPV6)) {
#endif
if (inet->opt)
- tp->ext_header_len -= inet->opt->optlen;
+ icsk->icsk_ext_hdr_len -= inet->opt->optlen;
if (opt)
- tp->ext_header_len += opt->optlen;
- tcp_sync_mss(sk, tp->pmtu_cookie);
+ icsk->icsk_ext_hdr_len += opt->optlen;
+ icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
}
#endif
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index eacfe6a3442c..00aa80e93243 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1914,7 +1914,7 @@ void tcp_get_info(struct sock *sk, struct tcp_info *info)
info->tcpi_last_data_recv = jiffies_to_msecs(now - icsk->icsk_ack.lrcvtime);
info->tcpi_last_ack_recv = jiffies_to_msecs(now - tp->rcv_tstamp);
- info->tcpi_pmtu = tp->pmtu_cookie;
+ info->tcpi_pmtu = icsk->icsk_pmtu_cookie;
info->tcpi_rcv_ssthresh = tp->rcv_ssthresh;
info->tcpi_rtt = jiffies_to_usecs(tp->srtt)>>3;
info->tcpi_rttvar = jiffies_to_usecs(tp->mdev)>>2;
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 7de6184d4bd8..981d1203b152 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -2342,7 +2342,7 @@ static int tcp_ack_update_window(struct sock *sk, struct tcp_sock *tp,
if (nwin > tp->max_window) {
tp->max_window = nwin;
- tcp_sync_mss(sk, tp->pmtu_cookie);
+ tcp_sync_mss(sk, inet_csk(sk)->icsk_pmtu_cookie);
}
}
}
@@ -3967,12 +3967,12 @@ static int tcp_rcv_synsent_state_process(struct sock *sk, struct sk_buff *skb,
struct tcphdr *th, unsigned len)
{
struct tcp_sock *tp = tcp_sk(sk);
+ struct inet_connection_sock *icsk = inet_csk(sk);
int saved_clamp = tp->rx_opt.mss_clamp;
tcp_parse_options(skb, &tp->rx_opt, 0);
if (th->ack) {
- struct inet_connection_sock *icsk;
/* rfc793:
* "If the state is SYN-SENT then
* first check the ACK bit
@@ -4061,7 +4061,7 @@ static int tcp_rcv_synsent_state_process(struct sock *sk, struct sk_buff *skb,
if (tp->rx_opt.sack_ok && sysctl_tcp_fack)
tp->rx_opt.sack_ok |= 2;
- tcp_sync_mss(sk, tp->pmtu_cookie);
+ tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
tcp_initialize_rcv_mss(sk);
/* Remember, tcp_poll() does not lock socket!
@@ -4071,8 +4071,6 @@ static int tcp_rcv_synsent_state_process(struct sock *sk, struct sk_buff *skb,
mb();
tcp_set_state(sk, TCP_ESTABLISHED);
- icsk = inet_csk(sk);
-
/* Make sure socket is routed, for correct metrics. */
icsk->icsk_af_ops->rebuild_header(sk);
@@ -4173,7 +4171,7 @@ discard:
if (tp->ecn_flags&TCP_ECN_OK)
sock_set_flag(sk, SOCK_NO_LARGESEND);
- tcp_sync_mss(sk, tp->pmtu_cookie);
+ tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
tcp_initialize_rcv_mss(sk);
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index c2fe61becd61..9b62d80bb20f 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -220,9 +220,9 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
inet->dport = usin->sin_port;
inet->daddr = daddr;
- tp->ext_header_len = 0;
+ inet_csk(sk)->icsk_ext_hdr_len = 0;
if (inet->opt)
- tp->ext_header_len = inet->opt->optlen;
+ inet_csk(sk)->icsk_ext_hdr_len = inet->opt->optlen;
tp->rx_opt.mss_clamp = 536;
@@ -275,7 +275,6 @@ static inline void do_pmtu_discovery(struct sock *sk, struct iphdr *iph,
{
struct dst_entry *dst;
struct inet_sock *inet = inet_sk(sk);
- struct tcp_sock *tp = tcp_sk(sk);
/* We are not interested in TCP_LISTEN and open_requests (SYN-ACKs
* send out by Linux are always <576bytes so they should go through
@@ -304,7 +303,7 @@ static inline void do_pmtu_discovery(struct sock *sk, struct iphdr *iph,
mtu = dst_mtu(dst);
if (inet->pmtudisc != IP_PMTUDISC_DONT &&
- tp->pmtu_cookie > mtu) {
+ inet_csk(sk)->icsk_pmtu_cookie > mtu) {
tcp_sync_mss(sk, mtu);
/* Resend the TCP packet because it's
@@ -895,9 +894,9 @@ struct sock *tcp_v4_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
ireq->opt = NULL;
newinet->mc_index = inet_iif(skb);
newinet->mc_ttl = skb->nh.iph->ttl;
- newtp->ext_header_len = 0;
+ inet_csk(newsk)->icsk_ext_hdr_len = 0;
if (newinet->opt)
- newtp->ext_header_len = newinet->opt->optlen;
+ inet_csk(newsk)->icsk_ext_hdr_len = newinet->opt->optlen;
newinet->id = newtp->write_seq ^ jiffies;
tcp_sync_mss(newsk, dst_mtu(dst));
@@ -1266,6 +1265,7 @@ static int tcp_v4_init_sock(struct sock *sk)
sock_set_flag(sk, SOCK_USE_WRITE_QUEUE);
icsk->icsk_af_ops = &ipv4_specific;
+ icsk->icsk_sync_mss = tcp_sync_mss;
sk->sk_sndbuf = sysctl_tcp_wmem[1];
sk->sk_rcvbuf = sysctl_tcp_rmem[1];
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index af1946c52c37..3a0a914de917 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -621,7 +621,7 @@ int tcp_trim_head(struct sock *sk, struct sk_buff *skb, u32 len)
It is minimum of user_mss and mss received with SYN.
It also does not include TCP options.
- tp->pmtu_cookie is last pmtu, seen by this function.
+ inet_csk(sk)->icsk_pmtu_cookie is last pmtu, seen by this function.
tp->mss_cache is current effective sending mss, including
all tcp options except for SACKs. It is evaluated,
@@ -631,17 +631,18 @@ int tcp_trim_head(struct sock *sk, struct sk_buff *skb, u32 len)
NOTE1. rfc1122 clearly states that advertised MSS
DOES NOT include either tcp or ip options.
- NOTE2. tp->pmtu_cookie and tp->mss_cache are READ ONLY outside
- this function. --ANK (980731)
+ NOTE2. inet_csk(sk)->icsk_pmtu_cookie and tp->mss_cache
+ are READ ONLY outside this function. --ANK (980731)
*/
unsigned int tcp_sync_mss(struct sock *sk, u32 pmtu)
{
struct tcp_sock *tp = tcp_sk(sk);
+ struct inet_connection_sock *icsk = inet_csk(sk);
/* Calculate base mss without TCP options:
It is MMS_S - sizeof(tcphdr) of rfc1122
*/
- int mss_now = (pmtu - inet_csk(sk)->icsk_af_ops->net_header_len -
+ int mss_now = (pmtu - icsk->icsk_af_ops->net_header_len -
sizeof(struct tcphdr));
/* Clamp it (mss_clamp does not include tcp options) */
@@ -649,7 +650,7 @@ unsigned int tcp_sync_mss(struct sock *sk, u32 pmtu)
mss_now = tp->rx_opt.mss_clamp;
/* Now subtract optional transport overhead */
- mss_now -= tp->ext_header_len;
+ mss_now -= icsk->icsk_ext_hdr_len;
/* Then reserve room for full set of TCP options and 8 bytes of data */
if (mss_now < 48)
@@ -663,7 +664,7 @@ unsigned int tcp_sync_mss(struct sock *sk, u32 pmtu)
mss_now = max((tp->max_window>>1), 68U - tp->tcp_header_len);
/* And store cached results */
- tp->pmtu_cookie = pmtu;
+ icsk->icsk_pmtu_cookie = pmtu;
tp->mss_cache = mss_now;
return mss_now;
@@ -693,7 +694,7 @@ unsigned int tcp_current_mss(struct sock *sk, int large_allowed)
if (dst) {
u32 mtu = dst_mtu(dst);
- if (mtu != tp->pmtu_cookie)
+ if (mtu != inet_csk(sk)->icsk_pmtu_cookie)
mss_now = tcp_sync_mss(sk, mtu);
}
@@ -706,7 +707,8 @@ unsigned int tcp_current_mss(struct sock *sk, int large_allowed)
if (doing_tso) {
xmit_size_goal = (65535 -
inet_csk(sk)->icsk_af_ops->net_header_len -
- tp->ext_header_len - tp->tcp_header_len);
+ inet_csk(sk)->icsk_ext_hdr_len -
+ tp->tcp_header_len);
if (tp->max_window &&
(xmit_size_goal > (tp->max_window >> 1)))
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index bf17aab9b776..70a510ff31ee 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -167,6 +167,7 @@ lookup_protocol:
sk->sk_reuse = 1;
inet = inet_sk(sk);
+ inet->is_icsk = INET_PROTOSW_ICSK & answer_flags;
if (SOCK_RAW == sock->type) {
inet->num = protocol;
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index b6b63fa8454c..c63868dd2ca2 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -163,17 +163,17 @@ int ipv6_setsockopt(struct sock *sk, int level, int optname,
sk_refcnt_debug_dec(sk);
if (sk->sk_protocol == IPPROTO_TCP) {
- struct tcp_sock *tp = tcp_sk(sk);
+ struct inet_connection_sock *icsk = inet_csk(sk);
local_bh_disable();
sock_prot_dec_use(sk->sk_prot);
sock_prot_inc_use(&tcp_prot);
local_bh_enable();
sk->sk_prot = &tcp_prot;
- inet_csk(sk)->icsk_af_ops = &ipv4_specific;
+ icsk->icsk_af_ops = &ipv4_specific;
sk->sk_socket->ops = &inet_stream_ops;
sk->sk_family = PF_INET;
- tcp_sync_mss(sk, tp->pmtu_cookie);
+ tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
} else {
local_bh_disable();
sock_prot_dec_use(sk->sk_prot);
@@ -317,14 +317,15 @@ int ipv6_setsockopt(struct sock *sk, int level, int optname,
}
retv = 0;
- if (sk->sk_type == SOCK_STREAM) {
+ if (inet_sk(sk)->is_icsk) {
if (opt) {
- struct tcp_sock *tp = tcp_sk(sk);
+ struct inet_connection_sock *icsk = inet_csk(sk);
if (!((1 << sk->sk_state) &
(TCPF_LISTEN | TCPF_CLOSE))
&& inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
- tp->ext_header_len = opt->opt_flen + opt->opt_nflen;
- tcp_sync_mss(sk, tp->pmtu_cookie);
+ icsk->icsk_ext_hdr_len =
+ opt->opt_flen + opt->opt_nflen;
+ icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
}
}
opt = xchg(&np->opt, opt);
@@ -380,14 +381,15 @@ sticky_done:
goto done;
update:
retv = 0;
- if (sk->sk_type == SOCK_STREAM) {
+ if (inet_sk(sk)->is_icsk) {
if (opt) {
- struct tcp_sock *tp = tcp_sk(sk);
+ struct inet_connection_sock *icsk = inet_csk(sk);
if (!((1 << sk->sk_state) &
(TCPF_LISTEN | TCPF_CLOSE))
&& inet_sk(sk)->daddr != LOOPBACK4_IPV6) {
- tp->ext_header_len = opt->opt_flen + opt->opt_nflen;
- tcp_sync_mss(sk, tp->pmtu_cookie);
+ icsk->icsk_ext_hdr_len =
+ opt->opt_flen + opt->opt_nflen;
+ icsk->icsk_sync_mss(sk, icsk->icsk_pmtu_cookie);
}
}
opt = xchg(&np->opt, opt);
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index a682eb9093e1..2947bc56d8a0 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -123,7 +123,8 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
int addr_len)
{
struct sockaddr_in6 *usin = (struct sockaddr_in6 *) uaddr;
- struct inet_sock *inet = inet_sk(sk);
+ struct inet_sock *inet = inet_sk(sk);
+ struct inet_connection_sock *icsk = inet_csk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
struct tcp_sock *tp = tcp_sk(sk);
struct in6_addr *saddr = NULL, *final_p = NULL, final;
@@ -198,7 +199,7 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
*/
if (addr_type == IPV6_ADDR_MAPPED) {
- u32 exthdrlen = tp->ext_header_len;
+ u32 exthdrlen = icsk->icsk_ext_hdr_len;
struct sockaddr_in sin;
SOCK_DEBUG(sk, "connect: ipv4 mapped\n");
@@ -210,14 +211,14 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
sin.sin_port = usin->sin6_port;
sin.sin_addr.s_addr = usin->sin6_addr.s6_addr32[3];
- inet_csk(sk)->icsk_af_ops = &ipv6_mapped;
+ icsk->icsk_af_ops = &ipv6_mapped;
sk->sk_backlog_rcv = tcp_v4_do_rcv;
err = tcp_v4_connect(sk, (struct sockaddr *)&sin, sizeof(sin));
if (err) {
- tp->ext_header_len = exthdrlen;
- inet_csk(sk)->icsk_af_ops = &ipv6_specific;
+ icsk->icsk_ext_hdr_len = exthdrlen;
+ icsk->icsk_af_ops = &ipv6_specific;
sk->sk_backlog_rcv = tcp_v6_do_rcv;
goto failure;
} else {
@@ -270,9 +271,10 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
sk->sk_route_caps = dst->dev->features &
~(NETIF_F_IP_CSUM | NETIF_F_TSO);
- tp->ext_header_len = 0;
+ icsk->icsk_ext_hdr_len = 0;
if (np->opt)
- tp->ext_header_len = np->opt->opt_flen + np->opt->opt_nflen;
+ icsk->icsk_ext_hdr_len = (np->opt->opt_flen +
+ np->opt->opt_nflen);
tp->rx_opt.mss_clamp = IPV6_MIN_MTU - sizeof(struct tcphdr) - sizeof(struct ipv6hdr);
@@ -385,7 +387,7 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
} else
dst_hold(dst);
- if (tp->pmtu_cookie > dst_mtu(dst)) {
+ if (inet_csk(sk)->icsk_pmtu_cookie > dst_mtu(dst)) {
tcp_sync_mss(sk, dst_mtu(dst));
tcp_simple_retransmit(sk);
} /* else let the usual retransmit timer handle it */
@@ -869,7 +871,7 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
worked with IPv6 icsk.icsk_af_ops.
Sync it now.
*/
- tcp_sync_mss(newsk, newtp->pmtu_cookie);
+ tcp_sync_mss(newsk, inet_csk(newsk)->icsk_pmtu_cookie);
return newsk;
}
@@ -976,10 +978,10 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
sock_kfree_s(sk, opt, opt->tot_len);
}
- newtp->ext_header_len = 0;
+ inet_csk(newsk)->icsk_ext_hdr_len = 0;
if (newnp->opt)
- newtp->ext_header_len = newnp->opt->opt_nflen +
- newnp->opt->opt_flen;
+ inet_csk(newsk)->icsk_ext_hdr_len = (newnp->opt->opt_nflen +
+ newnp->opt->opt_flen);
tcp_sync_mss(newsk, dst_mtu(dst));
newtp->advmss = dst_metric(dst, RTAX_ADVMSS);
@@ -1361,6 +1363,7 @@ static int tcp_v6_init_sock(struct sock *sk)
icsk->icsk_af_ops = &ipv6_specific;
icsk->icsk_ca_ops = &tcp_init_congestion_ops;
+ icsk->icsk_sync_mss = tcp_sync_mss;
sk->sk_write_space = sk_stream_write_space;
sock_set_flag(sk, SOCK_USE_WRITE_QUEUE);
@@ -1591,7 +1594,8 @@ static struct inet_protosw tcpv6_protosw = {
.ops = &inet6_stream_ops,
.capability = -1,
.no_check = 0,
- .flags = INET_PROTOSW_PERMANENT,
+ .flags = INET_PROTOSW_PERMANENT |
+ INET_PROTOSW_ICSK,
};
void __init tcpv6_init(void)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.