(OK) Android-x86-7.1.1/ kernel 4.4.62 - quagga - MIMP - 4 (mptcp_fullmesh.c)

gedit kernel/net/mptcp/mptcp_fullmesh.c

static void full_mesh_new_session(const struct sock *meta_sk)
{
struct mptcp_loc_addr *mptcp_local;
struct mptcp_cb *mpcb = tcp_sk(meta_sk)->mpcb;
struct fullmesh_priv *fmp = fullmesh_get_priv(mpcb);
const struct mptcp_fm_ns *fm_ns = fm_get_ns(sock_net(meta_sk));
struct tcp_sock *master_tp = tcp_sk(mpcb->master_sk);
int i, index, if_idx;
union inet_addr saddr, daddr;
sa_family_t family;
bool meta_v4 = meta_sk->sk_family == AF_INET;

/* Init local variables necessary for the rest */
if (meta_sk->sk_family == AF_INET || mptcp_v6_is_v4_mapped(meta_sk)) {
saddr.ip = inet_sk(meta_sk)->inet_saddr;
daddr.ip = inet_sk(meta_sk)->inet_daddr;
if_idx = mpcb->master_sk->sk_bound_dev_if;
family = AF_INET;
#if IS_ENABLED(CONFIG_IPV6)
} else {
saddr.in6 = inet6_sk(meta_sk)->saddr;
daddr.in6 = meta_sk->sk_v6_daddr;
if_idx = mpcb->master_sk->sk_bound_dev_if;
family = AF_INET6;
#endif
}

rcu_read_lock();
mptcp_local = rcu_dereference(fm_ns->local);

index = mptcp_find_address(mptcp_local, family, &saddr, if_idx);
if (index < 0)
goto fallback;

if (family == AF_INET)
master_tp->mptcp->low_prio = mptcp_local->locaddr4[index].low_prio;
else
master_tp->mptcp->low_prio = mptcp_local->locaddr6[index].low_prio;
master_tp->mptcp->send_mp_prio = master_tp->mptcp->low_prio;

full_mesh_add_raddr(mpcb, &daddr, family, 0, 0);
mptcp_set_init_addr_bit(mpcb, &daddr, family, index);

//ztg add
printk(KERN_INFO "full_mesh_new_session: i = %u\n", mptcp_local->loc4_bits);
printk(KERN_INFO "full_mesh_new_session: locaddr0 = %u\n", mptcp_local->locaddr4[0].addr.s_addr);
printk(KERN_INFO "full_mesh_new_session: locaddr1 = %u\n", mptcp_local->locaddr4[1].addr.s_addr);
printk(KERN_INFO "full_mesh_new_session: locaddr2 = %u\n", mptcp_local->locaddr4[2].addr.s_addr);
printk(KERN_INFO "full_mesh_new_session: locaddr3 = %u\n", mptcp_local->locaddr4[3].addr.s_addr);
printk(KERN_INFO "full_mesh_new_session: locaddr4 = %u\n", mptcp_local->locaddr4[4].addr.s_addr);
printk(KERN_INFO "full_mesh_new_session: locaddr5 = %u\n", mptcp_local->locaddr4[5].addr.s_addr);
printk(KERN_INFO "full_mesh_new_session: locaddr6 = %u\n", mptcp_local->locaddr4[6].addr.s_addr);
printk(KERN_INFO "full_mesh_new_session: locaddr7 = %u\n", mptcp_local->locaddr4[7].addr.s_addr);

/* Initialize workqueue-struct */
INIT_WORK(&fmp->subflow_work, create_subflow_worker);
INIT_DELAYED_WORK(&fmp->subflow_retry_work, retry_subflow_worker);
fmp->mpcb = mpcb;

if (!meta_v4 && meta_sk->sk_ipv6only)
goto skip_ipv4;

/* Look for the address among the local addresses */
mptcp_for_each_bit_set(mptcp_local->loc4_bits, i) {
__be32 ifa_address = mptcp_local->locaddr4[i].addr.s_addr;

/* We do not need to announce the initial subflow's address again */
if (family == AF_INET &&
(!if_idx || mptcp_local->locaddr4[i].if_idx == if_idx) &&
saddr.ip == ifa_address)
continue;

fmp->add_addr++;
mpcb->addr_signal = 1;
}
// ...
}

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)

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;

//ztg add
printk(KERN_INFO "create_subflow_worker: i = %u\n", fmp->rem4_bits);
printk(KERN_INFO "create_subflow_worker: remaddr0 = %u\n", fmp->remaddr4[0].addr.s_addr);
printk(KERN_INFO "create_subflow_worker: remaddr1 = %u\n", fmp->remaddr4[1].addr.s_addr);
printk(KERN_INFO "create_subflow_worker: remaddr2 = %u\n", fmp->remaddr4[2].addr.s_addr);
printk(KERN_INFO "create_subflow_worker: remaddr3 = %u\n", fmp->remaddr4[3].addr.s_addr);
printk(KERN_INFO "create_subflow_worker: remaddr4 = %u\n", fmp->remaddr4[4].addr.s_addr);
printk(KERN_INFO "create_subflow_worker: remaddr5 = %u\n", fmp->remaddr4[5].addr.s_addr);
printk(KERN_INFO "create_subflow_worker: remaddr6 = %u\n", fmp->remaddr4[6].addr.s_addr);
printk(KERN_INFO "create_subflow_worker: remaddr7 = %u\n", fmp->remaddr4[7].addr.s_addr);

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 "create_subflow_worker: i = %u\n", remaining_bits);
printk(KERN_INFO "create_subflow_worker: locaddr%d = %u\n", i, mptcp_local->locaddr4[i].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);
else
mptcp_v4_subflows(meta_sk,
&mptcp_local->locaddr4[i],
&rem4);
goto next_subflow;
}
}
// ...
}

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)