(OK) Android-x86-7.1.1/ kernel 4.4.62

gedit kernel/net/mptcp/mptcp_fullmesh.c

static void create_subflow_worker(struct work_struct *work){struct fullmesh_priv *fmp = container_of(work, struct fullmesh_priv, subflow_work);struct mptcp_cb *mpcb = fmp->mpcb;struct sock *meta_sk = mpcb->meta_sk;struct mptcp_loc_addr *mptcp_local;const struct mptcp_fm_ns *fm_ns = fm_get_ns(sock_net(meta_sk));int iter = 0, retry = 0;int i;/* We need a local (stable) copy of the address-list. Really, it is not * such a big deal, if the address-list is not 100% up-to-date. */rcu_read_lock_bh();mptcp_local = rcu_dereference_bh(fm_ns->local);mptcp_local = kmemdup(mptcp_local, sizeof(*mptcp_local), GFP_ATOMIC);rcu_read_unlock_bh();if (!mptcp_local)return;next_subflow:if (iter) {release_sock(meta_sk);mutex_unlock(&mpcb->mpcb_mutex);cond_resched();}mutex_lock(&mpcb->mpcb_mutex);lock_sock_nested(meta_sk, SINGLE_DEPTH_NESTING);/* Create the additional subflows for the first pair */if (fmp->first_pair == 0 && mpcb->master_sk) {struct mptcp_loc4 loc;struct mptcp_rem4 rem;loc.addr.s_addr = inet_sk(meta_sk)->inet_saddr;loc.loc4_id = 0;loc.low_prio = 0;loc.if_idx = mpcb->master_sk->sk_bound_dev_if;rem.addr.s_addr = inet_sk(meta_sk)->inet_daddr;rem.port = inet_sk(meta_sk)->inet_dport;rem.rem4_id = 0; /* Default 0 */mptcp_v4_subflows(meta_sk, &loc, &rem);fmp->first_pair = 1;}iter++;if (sock_flag(meta_sk, SOCK_DEAD))goto exit;if (mpcb->master_sk &&    !tcp_sk(mpcb->master_sk)->mptcp->fully_established)goto exit;/*112.26.0.1 (16783984)112.26.1.1 (16849520)112.26.2.1 (16915056)112.26.3.1 (16980592)112.26.4.1 (17046128)112.26.0.6 (100670064)112.26.1.6 (100735600)112.26.2.6 (100801136)112.26.3.6 (100866672)112.26.4.6 (100932208)*///ztg add/*printk(KERN_INFO "mptcp: create_subflow_worker: i = %u\n", fmp->rem4_bits);printk(KERN_INFO "mptcp: create_subflow_worker: remaddr0 = %u\n", fmp->remaddr4[0].addr.s_addr);printk(KERN_INFO "mptcp: create_subflow_worker: remaddr1 = %u\n", fmp->remaddr4[1].addr.s_addr);printk(KERN_INFO "mptcp: create_subflow_worker: remaddr2 = %u\n", fmp->remaddr4[2].addr.s_addr);printk(KERN_INFO "mptcp: create_subflow_worker: remaddr3 = %u\n", fmp->remaddr4[3].addr.s_addr);printk(KERN_INFO "mptcp: create_subflow_worker: remaddr4 = %u\n", fmp->remaddr4[4].addr.s_addr);printk(KERN_INFO "mptcp: create_subflow_worker: remaddr5 = %u\n", fmp->remaddr4[5].addr.s_addr);printk(KERN_INFO "mptcp: create_subflow_worker: remaddr6 = %u\n", fmp->remaddr4[6].addr.s_addr);printk(KERN_INFO "mptcp: create_subflow_worker: remaddr7 = %u\n", fmp->remaddr4[7].addr.s_addr);//*/printk(KERN_INFO "mptcp: create_subflow_worker: next_subflow\n");mptcp_for_each_bit_set(fmp->rem4_bits, i) {struct fullmesh_rem4 *rem;u8 remaining_bits;rem = &fmp->remaddr4[i];remaining_bits = ~(rem->bitfield) & mptcp_local->loc4_bits;/* Are there still combinations to handle? */if (remaining_bits) {int i = mptcp_find_free_index(~remaining_bits);struct mptcp_rem4 rem4;rem->bitfield |= (1 << i);rem4.addr = rem->addr;rem4.port = rem->port;rem4.rem4_id = rem->rem4_id;//ztg add//printk(KERN_INFO "mptcp: create_subflow_worker: i = %u\n", remaining_bits);//printk(KERN_INFO "mptcp: create_subflow_worker: locaddr%d = %u\n", i, mptcp_local->locaddr4[i].addr.s_addr);printk(KERN_INFO "mptcp: create_subflow_worker: locaddr = %u --- remaddr = %u\n", mptcp_local->locaddr4[i].addr.s_addr, rem4.addr.s_addr);/* If a route is not yet available then retry once */if (mptcp_init4_subsockets(meta_sk, &mptcp_local->locaddr4[i],   &rem4) == -ENETUNREACH)retry = rem->retry_bitfield |= (1 << i);elsemptcp_v4_subflows(meta_sk,  &mptcp_local->locaddr4[i],  &rem4);goto next_subflow;}}// ...}

gedit kernel/net/mptcp/mptcp_ipv4.c

/* Create a new IPv4 subflow. * * We are in user-context and meta-sock-lock is hold. */int mptcp_init4_subsockets(struct sock *meta_sk, const struct mptcp_loc4 *loc,   struct mptcp_rem4 *rem){struct tcp_sock *tp;struct sock *sk;struct sockaddr_in loc_in, rem_in;struct socket_alloc sock_full;struct socket *sock = (struct socket *)&sock_full;int ret;/** First, create and prepare the new socket */memcpy(&sock_full, meta_sk->sk_socket, sizeof(sock_full));sock->state = SS_UNCONNECTED;sock->ops = NULL;//ztg addprintk(KERN_INFO "mptcp: mptcp_init4_subsockets: 111\n");ret = inet_create(sock_net(meta_sk), sock, IPPROTO_TCP, 1);if (unlikely(ret < 0)) {mptcp_debug("%s inet_create failed ret: %d\n", __func__, ret);return ret;}sk = sock->sk;tp = tcp_sk(sk);/* All subsockets need the MPTCP-lock-class */lockdep_set_class_and_name(&(sk)->sk_lock.slock, &meta_slock_key, meta_slock_key_name);lockdep_init_map(&(sk)->sk_lock.dep_map, meta_key_name, &meta_key, 0);//ztg addprintk(KERN_INFO "mptcp: mptcp_init4_subsockets: 222\n");if (mptcp_add_sock(meta_sk, sk, loc->loc4_id, rem->rem4_id, GFP_KERNEL))goto error;tp->mptcp->slave_sk = 1;tp->mptcp->low_prio = loc->low_prio;/* Initializing the timer for an MPTCP subflow */setup_timer(&tp->mptcp->mptcp_ack_timer, mptcp_ack_handler, (unsigned long)sk);/** Then, connect the socket to the peer */loc_in.sin_family = AF_INET;rem_in.sin_family = AF_INET;loc_in.sin_port = 0;if (rem->port)rem_in.sin_port = rem->port;elserem_in.sin_port = inet_sk(meta_sk)->inet_dport;loc_in.sin_addr = loc->addr;rem_in.sin_addr = rem->addr;if (loc->if_idx)sk->sk_bound_dev_if = loc->if_idx;//ztg addprintk(KERN_INFO "mptcp: mptcp_init4_subsockets: 333\n");ret = kernel_bind(sock, (struct sockaddr *)&loc_in,  sizeof(struct sockaddr_in));if (ret < 0) {mptcp_debug("%s: MPTCP subsocket bind() failed, error %d\n",    __func__, ret);goto error;}mptcp_debug("%s: token %#x pi %d src_addr:%pI4:%d dst_addr:%pI4:%d ifidx: %d\n",    __func__, tcp_sk(meta_sk)->mpcb->mptcp_loc_token,    tp->mptcp->path_index, &loc_in.sin_addr,    ntohs(loc_in.sin_port), &rem_in.sin_addr,    ntohs(rem_in.sin_port), loc->if_idx);if (tcp_sk(meta_sk)->mpcb->pm_ops->init_subsocket_v4)tcp_sk(meta_sk)->mpcb->pm_ops->init_subsocket_v4(sk, rem->addr);//ztg addprintk(KERN_INFO "mptcp: mptcp_init4_subsockets: 444\n");ret = kernel_connect(sock, (struct sockaddr *)&rem_in,     sizeof(struct sockaddr_in), O_NONBLOCK);if (ret < 0 && ret != -EINPROGRESS) {mptcp_debug("%s: MPTCP subsocket connect() failed, error %d\n",    __func__, ret);goto error;}MPTCP_INC_STATS(sock_net(meta_sk), MPTCP_MIB_JOINSYNTX);sk_set_socket(sk, meta_sk->sk_socket);sk->sk_wq = meta_sk->sk_wq;//ztg addprintk(KERN_INFO "mptcp: mptcp_init4_subsockets: 555\n");return 0;error:/* May happen if mptcp_add_sock fails first */if (!mptcp(tp)) {tcp_close(sk, 0);} else {local_bh_disable();mptcp_sub_force_close(sk);local_bh_enable();}//ztg addprintk(KERN_INFO "mptcp: mptcp_init4_subsockets: 666\n");return ret;}EXPORT_SYMBOL(mptcp_init4_subsockets);