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author | David S. Miller <davem@davemloft.net> | 2020-06-25 19:29:51 -0700 |
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committer | David S. Miller <davem@davemloft.net> | 2020-06-25 19:29:51 -0700 |
commit | 7bed14551659875e1cd23a7c0266394a29a773b3 (patch) | |
tree | 2bbd8b1b2b1610d2e48a71bf7bb5f41ac5e1d0ef /net/mptcp | |
parent | b8392808eb3fc28e523e28cb258c81ca246deb9b (diff) | |
parent | 4a21185cda0fbb860580eeeb4f1a70a9cda332a4 (diff) | |
download | linux-stable-7bed14551659875e1cd23a7c0266394a29a773b3.tar.gz linux-stable-7bed14551659875e1cd23a7c0266394a29a773b3.tar.bz2 linux-stable-7bed14551659875e1cd23a7c0266394a29a773b3.zip |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Minor overlapping changes in xfrm_device.c, between the double
ESP trailing bug fix setting the XFRM_INIT flag and the changes
in net-next preparing for bonding encryption support.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/mptcp')
-rw-r--r-- | net/mptcp/options.c | 2 | ||||
-rw-r--r-- | net/mptcp/protocol.h | 1 | ||||
-rw-r--r-- | net/mptcp/subflow.c | 57 |
3 files changed, 28 insertions, 32 deletions
diff --git a/net/mptcp/options.c b/net/mptcp/options.c index 490b92534afc..df9a51425c6f 100644 --- a/net/mptcp/options.c +++ b/net/mptcp/options.c @@ -336,9 +336,7 @@ bool mptcp_syn_options(struct sock *sk, const struct sk_buff *skb, */ subflow->snd_isn = TCP_SKB_CB(skb)->end_seq; if (subflow->request_mptcp) { - pr_debug("local_key=%llu", subflow->local_key); opts->suboptions = OPTION_MPTCP_MPC_SYN; - opts->sndr_key = subflow->local_key; *size = TCPOLEN_MPTCP_MPC_SYN; return true; } else if (subflow->request_join) { diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index 06661781c9af..482f53aed30a 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -249,6 +249,7 @@ struct mptcp_subflow_request_sock { u64 thmac; u32 local_nonce; u32 remote_nonce; + struct mptcp_sock *msk; }; static inline struct mptcp_subflow_request_sock * diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c index bbdb74b8bc3c..3838a0b3a21f 100644 --- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -69,6 +69,9 @@ static void subflow_req_destructor(struct request_sock *req) pr_debug("subflow_req=%p", subflow_req); + if (subflow_req->msk) + sock_put((struct sock *)subflow_req->msk); + if (subflow_req->mp_capable) mptcp_token_destroy_request(subflow_req->token); tcp_request_sock_ops.destructor(req); @@ -86,8 +89,8 @@ static void subflow_generate_hmac(u64 key1, u64 key2, u32 nonce1, u32 nonce2, } /* validate received token and create truncated hmac and nonce for SYN-ACK */ -static bool subflow_token_join_request(struct request_sock *req, - const struct sk_buff *skb) +static struct mptcp_sock *subflow_token_join_request(struct request_sock *req, + const struct sk_buff *skb) { struct mptcp_subflow_request_sock *subflow_req = mptcp_subflow_rsk(req); u8 hmac[SHA256_DIGEST_SIZE]; @@ -97,13 +100,13 @@ static bool subflow_token_join_request(struct request_sock *req, msk = mptcp_token_get_sock(subflow_req->token); if (!msk) { SUBFLOW_REQ_INC_STATS(req, MPTCP_MIB_JOINNOTOKEN); - return false; + return NULL; } local_id = mptcp_pm_get_local_id(msk, (struct sock_common *)req); if (local_id < 0) { sock_put((struct sock *)msk); - return false; + return NULL; } subflow_req->local_id = local_id; @@ -114,9 +117,7 @@ static bool subflow_token_join_request(struct request_sock *req, subflow_req->remote_nonce, hmac); subflow_req->thmac = get_unaligned_be64(hmac); - - sock_put((struct sock *)msk); - return true; + return msk; } static void subflow_init_req(struct request_sock *req, @@ -133,6 +134,7 @@ static void subflow_init_req(struct request_sock *req, subflow_req->mp_capable = 0; subflow_req->mp_join = 0; + subflow_req->msk = NULL; #ifdef CONFIG_TCP_MD5SIG /* no MPTCP if MD5SIG is enabled on this socket or we may run out of @@ -166,12 +168,9 @@ static void subflow_init_req(struct request_sock *req, subflow_req->remote_id = mp_opt.join_id; subflow_req->token = mp_opt.token; subflow_req->remote_nonce = mp_opt.nonce; - pr_debug("token=%u, remote_nonce=%u", subflow_req->token, - subflow_req->remote_nonce); - if (!subflow_token_join_request(req, skb)) { - subflow_req->mp_join = 0; - // @@ need to trigger RST - } + subflow_req->msk = subflow_token_join_request(req, skb); + pr_debug("token=%u, remote_nonce=%u msk=%p", subflow_req->token, + subflow_req->remote_nonce, subflow_req->msk); } } @@ -354,10 +353,9 @@ static bool subflow_hmac_valid(const struct request_sock *req, const struct mptcp_subflow_request_sock *subflow_req; u8 hmac[SHA256_DIGEST_SIZE]; struct mptcp_sock *msk; - bool ret; subflow_req = mptcp_subflow_rsk(req); - msk = mptcp_token_get_sock(subflow_req->token); + msk = subflow_req->msk; if (!msk) return false; @@ -365,12 +363,7 @@ static bool subflow_hmac_valid(const struct request_sock *req, subflow_req->remote_nonce, subflow_req->local_nonce, hmac); - ret = true; - if (crypto_memneq(hmac, mp_opt->hmac, MPTCPOPT_HMAC_LEN)) - ret = false; - - sock_put((struct sock *)msk); - return ret; + return !crypto_memneq(hmac, mp_opt->hmac, MPTCPOPT_HMAC_LEN); } static void mptcp_sock_destruct(struct sock *sk) @@ -438,22 +431,25 @@ static struct sock *subflow_syn_recv_sock(const struct sock *sk, struct mptcp_subflow_context *listener = mptcp_subflow_ctx(sk); struct mptcp_subflow_request_sock *subflow_req; struct mptcp_options_received mp_opt; - bool fallback_is_fatal = false; + bool fallback, fallback_is_fatal; struct sock *new_msk = NULL; - bool fallback = false; struct sock *child; pr_debug("listener=%p, req=%p, conn=%p", listener, req, listener->conn); - /* we need later a valid 'mp_capable' value even when options are not - * parsed + /* After child creation we must look for 'mp_capable' even when options + * are not parsed */ mp_opt.mp_capable = 0; - if (tcp_rsk(req)->is_mptcp == 0) + + /* hopefully temporary handling for MP_JOIN+syncookie */ + subflow_req = mptcp_subflow_rsk(req); + fallback_is_fatal = subflow_req->mp_join; + fallback = !tcp_rsk(req)->is_mptcp; + if (fallback) goto create_child; /* if the sk is MP_CAPABLE, we try to fetch the client key */ - subflow_req = mptcp_subflow_rsk(req); if (subflow_req->mp_capable) { if (TCP_SKB_CB(skb)->seq != subflow_req->ssn_offset + 1) { /* here we can receive and accept an in-window, @@ -474,12 +470,11 @@ create_msk: if (!new_msk) fallback = true; } else if (subflow_req->mp_join) { - fallback_is_fatal = true; mptcp_get_options(skb, &mp_opt); if (!mp_opt.mp_join || !subflow_hmac_valid(req, &mp_opt)) { SUBFLOW_REQ_INC_STATS(req, MPTCP_MIB_JOINACKMAC); - return NULL; + fallback = true; } } @@ -522,10 +517,12 @@ create_child: } else if (ctx->mp_join) { struct mptcp_sock *owner; - owner = mptcp_token_get_sock(ctx->token); + owner = subflow_req->msk; if (!owner) goto dispose_child; + /* move the msk reference ownership to the subflow */ + subflow_req->msk = NULL; ctx->conn = (struct sock *)owner; if (!mptcp_finish_join(child)) goto dispose_child; |