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Message-id: <20180201000716.69301-14-cpaasch@apple.com>
Date: Wed, 31 Jan 2018 16:07:15 -0800
From: Christoph Paasch <cpaasch@...le.com>
To: netdev@...r.kernel.org
Cc: Eric Dumazet <edumazet@...gle.com>,
Mat Martineau <mathew.j.martineau@...ux.intel.com>,
Ivan Delalande <colona@...sta.com>
Subject: [RFC v2 13/14] tcp_md5: Cleanup TCP-code
Now that we have consolidated the TCP_MD5 output path, we can cleanup
TCP and its callbacks to MD5.
These callbacks are solely there to handle the different
address-familiese (v4, v6 and v4mapped).
Now that we have isolated the TCP_MD5-code it is acceptable to add a bit
more complexity inside tcp_md5.c to handle these address-families at the
benefit of getting rid of these callbacks in tcp_sock, together with its
assignments in tcp_v4/6_connect,...
Cc: Ivan Delalande <colona@...sta.com>
Signed-off-by: Christoph Paasch <cpaasch@...le.com>
Reviewed-by: Mat Martineau <mathew.j.martineau@...ux.intel.com>
---
include/linux/tcp.h | 5 -
include/linux/tcp_md5.h | 18 +--
include/net/tcp.h | 24 ----
net/ipv4/tcp.c | 2 +-
net/ipv4/tcp_ipv4.c | 8 --
net/ipv4/tcp_md5.c | 340 ++++++++++++++++++++++--------------------------
net/ipv6/tcp_ipv6.c | 17 ---
7 files changed, 155 insertions(+), 259 deletions(-)
diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index d4d22b9c19be..36f9bedeb6b1 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -388,11 +388,6 @@ struct tcp_sock {
* while socket was owned by user.
*/
-#ifdef CONFIG_TCP_MD5SIG
-/* TCP AF-Specific parts; only used by MD5 Signature support so far */
- const struct tcp_sock_af_ops *af_specific;
-#endif
-
/* TCP fastopen related information */
struct tcp_fastopen_request *fastopen_req;
/* fastopen_rsk points to request_sock that resulted in this big
diff --git a/include/linux/tcp_md5.h b/include/linux/tcp_md5.h
index 94a29c4f6fd1..441be65ec893 100644
--- a/include/linux/tcp_md5.h
+++ b/include/linux/tcp_md5.h
@@ -27,28 +27,14 @@ struct tcp_md5sig_key {
struct rcu_head rcu;
};
-extern const struct tcp_sock_af_ops tcp_sock_ipv4_specific;
-extern const struct tcp_sock_af_ops tcp_sock_ipv6_specific;
-extern const struct tcp_sock_af_ops tcp_sock_ipv6_mapped_specific;
-
/* - functions */
-int tcp_v4_md5_hash_skb(char *md5_hash, const struct tcp_md5sig_key *key,
- const struct sock *sk, const struct sk_buff *skb);
-struct tcp_md5sig_key *tcp_v4_md5_lookup(const struct sock *sk,
- const struct sock *addr_sk);
+int tcp_md5_parse_keys(struct sock *sk, int optname, char __user *optval,
+ int optlen);
bool tcp_v4_inbound_md5_hash(const struct sock *sk,
const struct sk_buff *skb);
-struct tcp_md5sig_key *tcp_v6_md5_lookup(const struct sock *sk,
- const struct sock *addr_sk);
-
-int tcp_v6_md5_hash_skb(char *md5_hash,
- const struct tcp_md5sig_key *key,
- const struct sock *sk,
- const struct sk_buff *skb);
-
bool tcp_v6_inbound_md5_hash(const struct sock *sk,
const struct sk_buff *skb);
diff --git a/include/net/tcp.h b/include/net/tcp.h
index d2738cb01cf2..ceb8ac1e17bd 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1730,32 +1730,8 @@ int tcp_conn_request(struct request_sock_ops *rsk_ops,
const struct tcp_request_sock_ops *af_ops,
struct sock *sk, struct sk_buff *skb);
-/* TCP af-specific functions */
-struct tcp_sock_af_ops {
-#ifdef CONFIG_TCP_MD5SIG
- struct tcp_md5sig_key *(*md5_lookup) (const struct sock *sk,
- const struct sock *addr_sk);
- int (*calc_md5_hash)(char *location,
- const struct tcp_md5sig_key *md5,
- const struct sock *sk,
- const struct sk_buff *skb);
- int (*md5_parse)(struct sock *sk,
- int optname,
- char __user *optval,
- int optlen);
-#endif
-};
-
struct tcp_request_sock_ops {
u16 mss_clamp;
-#ifdef CONFIG_TCP_MD5SIG
- struct tcp_md5sig_key *(*req_md5_lookup)(const struct sock *sk,
- const struct sock *addr_sk);
- int (*calc_md5_hash) (char *location,
- const struct tcp_md5sig_key *md5,
- const struct sock *sk,
- const struct sk_buff *skb);
-#endif
void (*init_req)(struct request_sock *req,
const struct sock *sk_listener,
struct sk_buff *skb);
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index fc5c9cb19b9b..ffff795f2dfb 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2828,7 +2828,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
case TCP_MD5SIG:
case TCP_MD5SIG_EXT:
/* Read the IP->Key mappings from userspace */
- err = tp->af_specific->md5_parse(sk, optname, optval, optlen);
+ err = tcp_md5_parse_keys(sk, optname, optval, optlen);
break;
#endif
case TCP_USER_TIMEOUT:
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 694089b0536b..6a839c1280b3 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -889,10 +889,6 @@ struct request_sock_ops tcp_request_sock_ops __read_mostly = {
static const struct tcp_request_sock_ops tcp_request_sock_ipv4_ops = {
.mss_clamp = TCP_MSS_DEFAULT,
-#ifdef CONFIG_TCP_MD5SIG
- .req_md5_lookup = tcp_v4_md5_lookup,
- .calc_md5_hash = tcp_v4_md5_hash_skb,
-#endif
.init_req = tcp_v4_init_req,
#ifdef CONFIG_SYN_COOKIES
.cookie_init_seq = cookie_v4_init_sequence,
@@ -1450,10 +1446,6 @@ static int tcp_v4_init_sock(struct sock *sk)
icsk->icsk_af_ops = &ipv4_specific;
-#ifdef CONFIG_TCP_MD5SIG
- tcp_sk(sk)->af_specific = &tcp_sock_ipv4_specific;
-#endif
-
return 0;
}
diff --git a/net/ipv4/tcp_md5.c b/net/ipv4/tcp_md5.c
index 2c238c853a56..e05db5af06ee 100644
--- a/net/ipv4/tcp_md5.c
+++ b/net/ipv4/tcp_md5.c
@@ -336,12 +336,13 @@ static int tcp_md5_hash_key(struct tcp_md5sig_pool *hp,
return crypto_ahash_update(hp->md5_req);
}
-static int tcp_v4_parse_md5_keys(struct sock *sk, int optname,
- char __user *optval, int optlen)
+int tcp_md5_parse_keys(struct sock *sk, int optname, char __user *optval,
+ int optlen)
{
+ u8 prefixlen = 32, maxprefixlen;
+ union tcp_md5_addr *tcpmd5addr;
struct tcp_md5sig cmd;
- struct sockaddr_in *sin = (struct sockaddr_in *)&cmd.tcpm_addr;
- u8 prefixlen = 32;
+ unsigned short family;
if (optlen < sizeof(cmd))
return -EINVAL;
@@ -349,76 +350,48 @@ static int tcp_v4_parse_md5_keys(struct sock *sk, int optname,
if (copy_from_user(&cmd, optval, sizeof(cmd)))
return -EFAULT;
- if (sin->sin_family != AF_INET)
- return -EINVAL;
-
- if (optname == TCP_MD5SIG_EXT &&
- cmd.tcpm_flags & TCP_MD5SIG_FLAG_PREFIX) {
- prefixlen = cmd.tcpm_prefixlen;
- if (prefixlen > 32)
- return -EINVAL;
- }
+ family = cmd.tcpm_addr.ss_family;
- if (!cmd.tcpm_keylen)
- return tcp_md5_do_del(sk, (union tcp_md5_addr *)&sin->sin_addr.s_addr,
- AF_INET, prefixlen);
-
- if (cmd.tcpm_keylen > TCP_MD5SIG_MAXKEYLEN)
+ if (family != AF_INET && family != AF_INET6)
return -EINVAL;
- return tcp_md5_do_add(sk, (union tcp_md5_addr *)&sin->sin_addr.s_addr,
- AF_INET, prefixlen, cmd.tcpm_key, cmd.tcpm_keylen,
- GFP_KERNEL);
-}
-
-#if IS_ENABLED(CONFIG_IPV6)
-static int tcp_v6_parse_md5_keys(struct sock *sk, int optname,
- char __user *optval, int optlen)
-{
- struct tcp_md5sig cmd;
- struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&cmd.tcpm_addr;
- u8 prefixlen;
-
- if (optlen < sizeof(cmd))
+ if (sk->sk_family != family)
return -EINVAL;
- if (copy_from_user(&cmd, optval, sizeof(cmd)))
- return -EFAULT;
+ if (family == AF_INET6) {
+ struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&cmd.tcpm_addr;
- if (sin6->sin6_family != AF_INET6)
- return -EINVAL;
+ if (!ipv6_addr_v4mapped(&sin6->sin6_addr)) {
+ tcpmd5addr = (union tcp_md5_addr *)&sin6->sin6_addr;
+ maxprefixlen = 128;
+ } else {
+ tcpmd5addr = (union tcp_md5_addr *)&sin6->sin6_addr.s6_addr32[3];
+ family = AF_INET;
+ maxprefixlen = 32;
+ }
+ } else {
+ struct sockaddr_in *sin = (struct sockaddr_in *)&cmd.tcpm_addr;
+
+ tcpmd5addr = (union tcp_md5_addr *)&sin->sin_addr;
+ maxprefixlen = 32;
+ }
if (optname == TCP_MD5SIG_EXT &&
cmd.tcpm_flags & TCP_MD5SIG_FLAG_PREFIX) {
prefixlen = cmd.tcpm_prefixlen;
- if (prefixlen > 128 || (ipv6_addr_v4mapped(&sin6->sin6_addr) &&
- prefixlen > 32))
+ if (prefixlen > maxprefixlen)
return -EINVAL;
- } else {
- prefixlen = ipv6_addr_v4mapped(&sin6->sin6_addr) ? 32 : 128;
}
- if (!cmd.tcpm_keylen) {
- if (ipv6_addr_v4mapped(&sin6->sin6_addr))
- return tcp_md5_do_del(sk, (union tcp_md5_addr *)&sin6->sin6_addr.s6_addr32[3],
- AF_INET, prefixlen);
- return tcp_md5_do_del(sk, (union tcp_md5_addr *)&sin6->sin6_addr,
- AF_INET6, prefixlen);
- }
+ if (!cmd.tcpm_keylen)
+ return tcp_md5_do_del(sk, tcpmd5addr, family, prefixlen);
if (cmd.tcpm_keylen > TCP_MD5SIG_MAXKEYLEN)
return -EINVAL;
- if (ipv6_addr_v4mapped(&sin6->sin6_addr))
- return tcp_md5_do_add(sk, (union tcp_md5_addr *)&sin6->sin6_addr.s6_addr32[3],
- AF_INET, prefixlen, cmd.tcpm_key,
- cmd.tcpm_keylen, GFP_KERNEL);
-
- return tcp_md5_do_add(sk, (union tcp_md5_addr *)&sin6->sin6_addr,
- AF_INET6, prefixlen, cmd.tcpm_key,
+ return tcp_md5_do_add(sk, tcpmd5addr, family, prefixlen, cmd.tcpm_key,
cmd.tcpm_keylen, GFP_KERNEL);
}
-#endif
static int tcp_v4_md5_hash_headers(struct tcp_md5sig_pool *hp,
__be32 daddr, __be32 saddr,
@@ -670,6 +643,102 @@ static int tcp_md5_hash_skb_data(struct tcp_md5sig_pool *hp,
return 0;
}
+static int tcp_v4_md5_hash_skb(char *md5_hash, const struct tcp_md5sig_key *key,
+ const struct sock *sk, const struct sk_buff *skb)
+{
+ struct tcp_md5sig_pool *hp;
+ struct ahash_request *req;
+ const struct tcphdr *th = tcp_hdr(skb);
+ __be32 saddr, daddr;
+
+ if (sk) { /* valid for establish/request sockets */
+ saddr = sk->sk_rcv_saddr;
+ daddr = sk->sk_daddr;
+ } else {
+ const struct iphdr *iph = ip_hdr(skb);
+
+ saddr = iph->saddr;
+ daddr = iph->daddr;
+ }
+
+ hp = tcp_get_md5sig_pool();
+ if (!hp)
+ goto clear_hash_noput;
+ req = hp->md5_req;
+
+ if (crypto_ahash_init(req))
+ goto clear_hash;
+
+ if (tcp_v4_md5_hash_headers(hp, daddr, saddr, th, skb->len))
+ goto clear_hash;
+ if (tcp_md5_hash_skb_data(hp, skb, th->doff << 2))
+ goto clear_hash;
+ if (tcp_md5_hash_key(hp, key))
+ goto clear_hash;
+ ahash_request_set_crypt(req, NULL, md5_hash, 0);
+ if (crypto_ahash_final(req))
+ goto clear_hash;
+
+ tcp_put_md5sig_pool();
+ return 0;
+
+clear_hash:
+ tcp_put_md5sig_pool();
+clear_hash_noput:
+ memset(md5_hash, 0, 16);
+ return 1;
+}
+
+#if IS_ENABLED(CONFIG_IPV6)
+static int tcp_v6_md5_hash_skb(char *md5_hash,
+ const struct tcp_md5sig_key *key,
+ const struct sock *sk,
+ const struct sk_buff *skb)
+{
+ const struct in6_addr *saddr, *daddr;
+ struct tcp_md5sig_pool *hp;
+ struct ahash_request *req;
+ const struct tcphdr *th = tcp_hdr(skb);
+
+ if (sk) { /* valid for establish/request sockets */
+ saddr = &sk->sk_v6_rcv_saddr;
+ daddr = &sk->sk_v6_daddr;
+ } else {
+ const struct ipv6hdr *ip6h = ipv6_hdr(skb);
+
+ saddr = &ip6h->saddr;
+ daddr = &ip6h->daddr;
+ }
+
+ hp = tcp_get_md5sig_pool();
+ if (!hp)
+ goto clear_hash_noput;
+ req = hp->md5_req;
+
+ if (crypto_ahash_init(req))
+ goto clear_hash;
+
+ if (tcp_v6_md5_hash_headers(hp, daddr, saddr, th, skb->len))
+ goto clear_hash;
+ if (tcp_md5_hash_skb_data(hp, skb, th->doff << 2))
+ goto clear_hash;
+ if (tcp_md5_hash_key(hp, key))
+ goto clear_hash;
+ ahash_request_set_crypt(req, NULL, md5_hash, 0);
+ if (crypto_ahash_final(req))
+ goto clear_hash;
+
+ tcp_put_md5sig_pool();
+ return 0;
+
+clear_hash:
+ tcp_put_md5sig_pool();
+clear_hash_noput:
+ memset(md5_hash, 0, 16);
+ return 1;
+}
+#endif
+
static int tcp_v4_md5_send_response_prepare(struct sk_buff *skb, u8 flags,
unsigned int remaining,
struct tcp_out_options *opts,
@@ -784,114 +853,14 @@ static __be32 *tcp_md5_send_response_write(__be32 *ptr, struct sk_buff *orig,
return tcp_v4_md5_send_response_write(ptr, orig, th, opts, sk);
}
-struct tcp_md5sig_key *tcp_v4_md5_lookup(const struct sock *sk,
- const struct sock *addr_sk)
+static struct tcp_md5sig_key *tcp_v4_md5_lookup(const struct sock *sk,
+ const struct sock *addr_sk)
{
const union tcp_md5_addr *addr;
addr = (const union tcp_md5_addr *)&addr_sk->sk_daddr;
return tcp_md5_do_lookup(sk, addr, AF_INET);
}
-EXPORT_SYMBOL(tcp_v4_md5_lookup);
-
-int tcp_v4_md5_hash_skb(char *md5_hash, const struct tcp_md5sig_key *key,
- const struct sock *sk,
- const struct sk_buff *skb)
-{
- struct tcp_md5sig_pool *hp;
- struct ahash_request *req;
- const struct tcphdr *th = tcp_hdr(skb);
- __be32 saddr, daddr;
-
- if (sk) { /* valid for establish/request sockets */
- saddr = sk->sk_rcv_saddr;
- daddr = sk->sk_daddr;
- } else {
- const struct iphdr *iph = ip_hdr(skb);
-
- saddr = iph->saddr;
- daddr = iph->daddr;
- }
-
- hp = tcp_get_md5sig_pool();
- if (!hp)
- goto clear_hash_noput;
- req = hp->md5_req;
-
- if (crypto_ahash_init(req))
- goto clear_hash;
-
- if (tcp_v4_md5_hash_headers(hp, daddr, saddr, th, skb->len))
- goto clear_hash;
- if (tcp_md5_hash_skb_data(hp, skb, th->doff << 2))
- goto clear_hash;
- if (tcp_md5_hash_key(hp, key))
- goto clear_hash;
- ahash_request_set_crypt(req, NULL, md5_hash, 0);
- if (crypto_ahash_final(req))
- goto clear_hash;
-
- tcp_put_md5sig_pool();
- return 0;
-
-clear_hash:
- tcp_put_md5sig_pool();
-clear_hash_noput:
- memset(md5_hash, 0, 16);
- return 1;
-}
-EXPORT_SYMBOL(tcp_v4_md5_hash_skb);
-
-#if IS_ENABLED(CONFIG_IPV6)
-int tcp_v6_md5_hash_skb(char *md5_hash,
- const struct tcp_md5sig_key *key,
- const struct sock *sk,
- const struct sk_buff *skb)
-{
- const struct in6_addr *saddr, *daddr;
- struct tcp_md5sig_pool *hp;
- struct ahash_request *req;
- const struct tcphdr *th = tcp_hdr(skb);
-
- if (sk) { /* valid for establish/request sockets */
- saddr = &sk->sk_v6_rcv_saddr;
- daddr = &sk->sk_v6_daddr;
- } else {
- const struct ipv6hdr *ip6h = ipv6_hdr(skb);
-
- saddr = &ip6h->saddr;
- daddr = &ip6h->daddr;
- }
-
- hp = tcp_get_md5sig_pool();
- if (!hp)
- goto clear_hash_noput;
- req = hp->md5_req;
-
- if (crypto_ahash_init(req))
- goto clear_hash;
-
- if (tcp_v6_md5_hash_headers(hp, daddr, saddr, th, skb->len))
- goto clear_hash;
- if (tcp_md5_hash_skb_data(hp, skb, th->doff << 2))
- goto clear_hash;
- if (tcp_md5_hash_key(hp, key))
- goto clear_hash;
- ahash_request_set_crypt(req, NULL, md5_hash, 0);
- if (crypto_ahash_final(req))
- goto clear_hash;
-
- tcp_put_md5sig_pool();
- return 0;
-
-clear_hash:
- tcp_put_md5sig_pool();
-clear_hash_noput:
- memset(md5_hash, 0, 16);
- return 1;
-}
-EXPORT_SYMBOL_GPL(tcp_v6_md5_hash_skb);
-#endif
/* Called with rcu_read_lock() */
bool tcp_v4_inbound_md5_hash(const struct sock *sk,
@@ -994,8 +963,8 @@ bool tcp_v6_inbound_md5_hash(const struct sock *sk,
}
EXPORT_SYMBOL_GPL(tcp_v6_inbound_md5_hash);
-struct tcp_md5sig_key *tcp_v6_md5_lookup(const struct sock *sk,
- const struct sock *addr_sk)
+static struct tcp_md5sig_key *tcp_v6_md5_lookup(const struct sock *sk,
+ const struct sock *addr_sk)
{
return tcp_v6_md5_do_lookup(sk, &addr_sk->sk_v6_daddr);
}
@@ -1103,10 +1072,17 @@ static int tcp_md5_extopt_add_header_len(const struct sock *orig,
const struct sock *sk,
struct tcp_extopt_store *store)
{
- struct tcp_sock *tp = tcp_sk(sk);
-
- if (tp->af_specific->md5_lookup(orig, sk))
+#if IS_ENABLED(CONFIG_IPV6)
+ if (sk->sk_family == AF_INET6 &&
+ !ipv6_addr_v4mapped(&sk->sk_v6_daddr)) {
+ if (tcp_v6_md5_lookup(orig, sk))
+ return TCPOLEN_MD5SIG_ALIGNED;
+ } else
+#endif
+{
+ if (tcp_v4_md5_lookup(orig, sk))
return TCPOLEN_MD5SIG_ALIGNED;
+}
return 0;
}
@@ -1120,19 +1096,29 @@ static unsigned int tcp_md5_extopt_prepare(struct sk_buff *skb, u8 flags,
int ret = 0;
if (sk_fullsock(sk)) {
- struct tcp_sock *tp = tcp_sk(sk);
-
- opts->md5 = tp->af_specific->md5_lookup(sk, sk);
+#if IS_ENABLED(CONFIG_IPV6)
+ if (sk->sk_family == AF_INET6 && !ipv6_addr_v4mapped(&sk->sk_v6_daddr))
+ opts->md5 = tcp_v6_md5_lookup(sk, sk);
+ else
+#endif
+ opts->md5 = tcp_v4_md5_lookup(sk, sk);
} else {
struct request_sock *req = inet_reqsk(sk);
struct sock *listener = req->rsk_listener;
+ struct inet_request_sock *ireq = inet_rsk(req);
/* Coming from tcp_make_synack, unlock is in
* tcp_md5_extopt_write
*/
rcu_read_lock();
- opts->md5 = tcp_rsk(req)->af_specific->req_md5_lookup(listener, sk);
+#if IS_ENABLED(CONFIG_IPV6)
+ if (ireq->ireq_family == AF_INET6 &&
+ !ipv6_addr_v4mapped(&ireq->ir_v6_rmt_addr))
+ opts->md5 = tcp_v6_md5_lookup(listener, sk);
+ else
+#endif
+ opts->md5 = tcp_v4_md5_lookup(listener, sk);
if (!opts->md5)
rcu_read_unlock();
@@ -1352,25 +1338,3 @@ static void tcp_md5_extopt_destroy(struct tcp_extopt_store *store)
kfree_rcu(md5_opt, rcu);
}
}
-
-const struct tcp_sock_af_ops tcp_sock_ipv4_specific = {
- .md5_lookup = tcp_v4_md5_lookup,
- .calc_md5_hash = tcp_v4_md5_hash_skb,
- .md5_parse = tcp_v4_parse_md5_keys,
-};
-
-#if IS_ENABLED(CONFIG_IPV6)
-const struct tcp_sock_af_ops tcp_sock_ipv6_specific = {
- .md5_lookup = tcp_v6_md5_lookup,
- .calc_md5_hash = tcp_v6_md5_hash_skb,
- .md5_parse = tcp_v6_parse_md5_keys,
-};
-EXPORT_SYMBOL_GPL(tcp_sock_ipv6_specific);
-
-const struct tcp_sock_af_ops tcp_sock_ipv6_mapped_specific = {
- .md5_lookup = tcp_v4_md5_lookup,
- .calc_md5_hash = tcp_v4_md5_hash_skb,
- .md5_parse = tcp_v6_parse_md5_keys,
-};
-EXPORT_SYMBOL_GPL(tcp_sock_ipv6_mapped_specific);
-#endif
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 3c48283a76c1..8800e5d75677 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -207,9 +207,6 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
icsk->icsk_af_ops = &ipv6_mapped;
sk->sk_backlog_rcv = tcp_v4_do_rcv;
-#ifdef CONFIG_TCP_MD5SIG
- tp->af_specific = &tcp_sock_ipv6_mapped_specific;
-#endif
err = tcp_v4_connect(sk, (struct sockaddr *)&sin, sizeof(sin));
@@ -217,9 +214,6 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
icsk->icsk_ext_hdr_len = exthdrlen;
icsk->icsk_af_ops = &ipv6_specific;
sk->sk_backlog_rcv = tcp_v6_do_rcv;
-#ifdef CONFIG_TCP_MD5SIG
- tp->af_specific = &tcp_sock_ipv6_specific;
-#endif
goto failure;
}
np->saddr = sk->sk_v6_rcv_saddr;
@@ -542,10 +536,6 @@ struct request_sock_ops tcp6_request_sock_ops __read_mostly = {
static const struct tcp_request_sock_ops tcp_request_sock_ipv6_ops = {
.mss_clamp = IPV6_MIN_MTU - sizeof(struct tcphdr) -
sizeof(struct ipv6hdr),
-#ifdef CONFIG_TCP_MD5SIG
- .req_md5_lookup = tcp_v6_md5_lookup,
- .calc_md5_hash = tcp_v6_md5_hash_skb,
-#endif
.init_req = tcp_v6_init_req,
#ifdef CONFIG_SYN_COOKIES
.cookie_init_seq = cookie_v6_init_sequence,
@@ -820,9 +810,6 @@ static struct sock *tcp_v6_syn_recv_sock(const struct sock *sk, struct sk_buff *
inet_csk(newsk)->icsk_af_ops = &ipv6_mapped;
newsk->sk_backlog_rcv = tcp_v4_do_rcv;
-#ifdef CONFIG_TCP_MD5SIG
- newtp->af_specific = &tcp_sock_ipv6_mapped_specific;
-#endif
newnp->ipv6_mc_list = NULL;
newnp->ipv6_ac_list = NULL;
@@ -1429,10 +1416,6 @@ static int tcp_v6_init_sock(struct sock *sk)
icsk->icsk_af_ops = &ipv6_specific;
-#ifdef CONFIG_TCP_MD5SIG
- tcp_sk(sk)->af_specific = &tcp_sock_ipv6_specific;
-#endif
-
return 0;
}
--
2.16.1
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