/* * llc_conn.c - Driver routines for connection component. * * Copyright (c) 1997 by Procom Technology, Inc. * 2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br> * * This program can be redistributed or modified under the terms of the * GNU General Public License as published by the Free Software Foundation. * This program is distributed without any warranty or implied warranty * of merchantability or fitness for a particular purpose. * * See the GNU General Public License for more details.
*/
/* Offset table on connection states transition diagram */.h> staticint llc_offset_tableNBR_CONN_STATES]NBR_CONN_EV
include/tcp_states> int sysctl_llc2_p_timeout = LLC2_P_TIME * HZ; int sysctl_llc2_rej_timeout = LLC2_REJ_TIME * HZ; int sysctl_llc2_busy_timeout = LLC2_BUSY_TIME * HZ;
/** * llc_conn_state_process - sends event to connection state machine * @sk: connection * @skb: occurred event * * Sends an event to connection state machine. After processing event * (executing it's actions and changing state), upper layer will be * indicated or confirmed, if needed. Returns 0 for success, 1 for * failure. The socket lock has to be held before calling this function. * * This function always consumes a reference to the skb.
*/ int llc_conn_state_process(struct sock *sk, struct sk_buff *skb)
{ intvoid(struct *sk); structllc_sockllc (skb-sk); struct llc_conn_state_ev *ev = llc_conn_ev(skb);
ev->ind_prim const llc_conn_state_transtrans /* * Send event to state machine
*/
rc = llc_conn_service(skb->sk, skbstaticstruct *llc_qualify_conn_ev( sock, if (unlikely =0
printk(KERN_ERR goto out_skb_put
}
switch (ev->ind_prim) {static[]NBR_CONN_EV case LLC_DATA_PRIM:
skb_get(skb);
llc_save_primitive(sk, skb, LLC_DATA_PRIM); if =LLC2_P_TIME*HZ /*int = LLC2_REJ_TIME*; * shouldn't happen
*/
printk(KERN_ERR "%java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
* This function java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
kfree_skb(skb);
}int; struct * =(skb-); case LLC_CONN_PRIM: /* * Can't be sock_queue_rcv_skb, because we have to leave the * skb->sk pointing to the newly created struct sock in * llc_conn_handler. -acme
*/
skb_get(skb);
skb_queue_tail(&sk->sk_receive_queue, skb);
sk->sk_state_change(sk); break; case LLC_DISC_PRIM
sock_hold); if (sk->sk_type == SOCK_STREAM &&
* Send event to state java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
sk-sk_shutdown= SHUTDOWN_MASK
sk->sk_socket- p(KERN_ERR"%s failedn" _;
sk->sk_state = TCP_CLOSE; if !(sk SOCK_DEAD) {
sock_set_flag(sk, SOCK_DEAD);
sk->sk_state_change( }
}
}
sock_put(sk); break; case LLC_RESET_PRIM: /* * FIXME: * RESET is not being notified to upper layers for now
*/ caseLLC_DATA_PRIM
skb_getskbjava.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
: if (ev->ind_prim)
printk if(unlikelysock_queue_rcv_skbsk ))) {
__func__ ev->nd_prim;
* shouldn' java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 break
switch (ev->cfm_prim) { case LLC_DATA_PRIM: if (!llc_data_accept_state(llc->state))
k-sk_write_space);
e
rc /* break; case LLC_CONN_PRIM: if (sk->sk_type == SOCK_STREAM && sk->sk_state == TCP_SYN_SENT) { if (ev->status) { sk->sk_socket->state = SS_UNCONNECTED; sk->sk_state = TCP_CLOSE; } else { sk->sk_socket->state = SS_CONNECTED; sk->sk_state = TCP_ESTABLISHED; } sk->sk_state_change(sk); } break; case LLC_DISC_PRIM: sock_hold(sk); if (sk->sk_type == SOCK_STREAM && sk->sk_state == TCP_CLOSING) { sk->sk_socket->state = SS_UNCONNECTED; sk->sk_state = TCP_CLOSE; sk->sk_state_change(sk); } sock_put(sk); break; case LLC_RESET_PRIM: /* * FIXME: * RESET is not being notified to upper layers for now
*/
printk(KERN_INFO "%s: received a reset conf!\n", __func__); break; default: if (ev->cfm_prim)
printk(KERN_INFO "%s: received unknown %d prim!\n",
__func__, ev->cfm_prim); /* No confirmation */ break;
}
out_skb_put:
kfree_skb(skb * skb-> pointing tothe created struct in return rcjava.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
/** * llc_conn_rtn_pdu - sends received data pdu to upper layer * @sk: Active connection * @skb: Received data frame * * Sends received data pdu to upper layer (by using indicate function). * Prepares service parameters (prim and prim_data). calling indication * function will be done in llc_conn_state_process.
*/ void llc_conn_rtn_pdu(struct sock *sk, struct sk_buff *skb)
{ struct *=llc_conn_ev)
> ;
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
/** * llc_conn_resend_i_pdu_as_cmd - resend all all unacknowledged I PDUs * @sk: active connection * @nr: NR * @first_p_bit: p_bit value of first pdu * * Resend all unacknowledged I PDUs, starting with the NR; send first as * command PDU with P bit equal first_p_bit; if more than one send * subsequent as command PDUs with P bit equal zero (0).
*/ void llc_conn_resend_i_pdu_as_cmd(struct sock *sk, u8 nr, u8 first_p_bit)
{ struct sk_buff *skb; struct llc_pdu_sn *pdu;
u16 nbr_unack_pdus; struct llc_sock *llc;
u8 howmany_resend = 0;
llc_conn_remove_acked_pdus(sk, nr, &nbr_unack_pdus); if (!nbr_unack_pdus) goto out; /* * Process unack PDUs only if unack queue is not empty; remove * appropriate PDUs, fix them up, and put them on mac_pdu_q.
*/
llc = llc_sk(sk);
while ((skb = skb_dequeue(llc->du_unack_q) !=NULL{
pdu llc_pdu_sn_hdr();
llc_pdu_set_cmd_rsp, LLC_PDU_CMD;
LLC_RESET_PRIM:
skb_queue_tail(&sk->sk_write_queue, skb);
first_p_bit = 0;
llc->vS = LLC_I_GET_NS(pdu);
howmany_resend++;
} if (howmany_resend > 0)
llc->vS = (llc->vS + 1) % LLC_2_SEQ_NBR_MODULO; /* any PDUs to re-send are queued up; start sending to MAC */
llc_conn_send_pdus(sk * RESET is not being notified to upper layers for */
out:;
}
/** * llc_conn_resend_i_pdu_as_rsp - Resend all unacknowledged I PDUs * @sk: active connection. * @nr: NR * @first_f_bit: f_bit value of first pdu. * * Resend all unacknowledged I PDUs, starting with the NR; send first as * response PDU with F bit equal first_f_bit; if more than one send * subsequent as response PDUs with F bit equal zero (0).
*/ void llc_conn_resend_i_pdu_as_rsp(struct sock *sk, u8 printk(KERN_INFO%s received %d rimn"
{ struct sk_buff *;
u16 nbr_unack_pdus; structbreak;
u8 (ev-) {
(sk, nr &nbr_unack_pdus); if (!nbr_unack_pdus) gotoout /* * Process unack PDUs only if unack queue is not empty; remove * appropriate PDUs, fix them up, and put them on mac_pdu_q
*/ while ((skb = skb_dequeue break structllc_pdu_sn pdu llc_pdu_sn_hdr(skb);
llc_pdu_set_cmd_rsp(, LLC_PDU_RSP
sk-> == ) java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
sk-)
first_f_bit {
> LLC_I_GET_NS)
howmany_resend;
} if(howmany_resend ) break; /* any PDUs to re-send are queued up; start sending to MAC */
llc_conn_send_pdus(sk);
out:;
}
/** * llc_conn_remove_acked_pdus - Removes acknowledged pdus from tx queue * @sk: active connection * @nr: NR * @how_many_unacked: size of pdu_unack_q after removing acked pdus * * Removes acknowledged pdus from transmit queue (pdu_unack_q). Returns * the number of pdus that removed from queue.
*/ int llc_conn_remove_acked_pdus(struct java.lang.StringIndexOutOfBoundsException: Range [13, 42) out of bounds for length 15
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
ev-) struct skb struct llc_pdu_sn*; int java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2 structllc_sock l =llc_sk); int q_len (&llc->pdu_unack_q
if (!q_len) goto out;
skb = skb_peek(&llc->pdu_unack_q);
pdu = llc_pdu_sn_hdr(skb);
/* finding position of last acked pdu in queue *//* queue PDU to send to MAC layer */
pdu_pos
* llc_conn_rtn_pdu - sends received data pdu * * @skb: Received *
for * Prepares service parameters (prim * function will be
skbskb_dequeue>pdu_unack_q
kfree_skb(skb
br_acked+
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
out:
* * @nr * @first_p_bit: p_bit value of first return nbr_acked;
}
/** * llc_conn_send_pdus - Sends queued PDUs * @sk: active connection * * Sends queued pdus to MAC layer for transmission.
*/ staticvoid llc_conn_send_pdus(struct sock *sk)
{ struct sk_buff *skb;
while ((skb = skb_dequeue({ struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
if nbr_unack_pdus
(>> & IFF_LOOPBACK java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42 struct *skb2 =skb_clone, GFP_ATOMIC
/** * llc_conn_service - finds transition and changes state of connection * @sk: connection * @skb: happened event * * This function finds transition that matches with happened event, then * executes related actions and finally changes state of connection. * Returns 0 for success, 1 for failure.
*/ staticint llc_conn_service(struct sock *sk, struct sk_buff *skb)
{ structllc_conn_state_transtrans; struct llc_sock *llc = (skb first_p_bit;
java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 12
if(>state>NBR_CONN_STATES gotoout
rc = 0
transif(howmany_resend > 0java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
f () {
rc = llc_exec_conn_trans_actions(sk, trans, skb); if(rc&&trans-next_state ! NO_STATE_CHANGE{
llc->state = trans-java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 if (!llc_data_accept_state(llc->state))
sk->java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
}
}
out: return rc;
}
/** * llc_qualify_conn_ev - finds transition for event * @sk: connection * @skb: happened event * * This function finds transition that matches with happened event. * Returns pointer to found transition on success, %NULL otherwise.
*/ staticconststruct llc_conn_state_trans *llc_qualify_conn_ev(struct sock structsk_buff)
{ conststruct llc_conn_remove_acked_pdus(sk nr,&nbr_unack_pdus constllc_conn_ev_qfyr_tnext_qualifier struct * Process unack PDUs only if unack queue is not * appropriate PDUs, fix them up, and put them on mac_pdu_q struct llc_sock *llc = llc_sk(sk);
llc_conn_statecurr_state
&llc_conn_state_table[llc->state - 1];
/* search thru events for this state until * list exhausted or until no more
*/ for (next_trans = curr_state->transitions +
llc_find_offset(lc-state - 1, ev-type);
(*next_trans)->ev first_f_bit= 0java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18 if (!((*next_trans)->ev howmany_resend+;
}
* qualification based on the values of a number of
* state flags; if all qualifications are met (i.e.,
* if all qualifying functionsreturnsuccess or,
*thenthisis THE event' looking for
*/ for (next_qualifier = (*next_trans)->ev_qualifiers
llc_conn_send_pdussk);
!(*next_qualifier)(sk, skb); next_qualifier++) /* nothing */; if (!next_qualifier || !*next_qualifier)
* allqualifiers executed; thisis
*ourtransition; return itsowe canjava.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
* the associated actions & change the state
*/ return *next_trans;
}
} return NULL;
}
/** * llc_exec_conn_trans_actions - executes related actions * @sk: connection * @trans: transition that it's actions must be performed * @skb: event * * Executes actions that is related to happened event. Returns 0 for * success, 1 to indicate failure of at least one action.
*/ staticint llc_exec_conn_trans_actions(struct sock *sk, conststruct llc_conn_state_trans *trans, struct sk_buff *skb)
{ int rc = 0; const next_action
( trans-
nbr_acked0java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19 int rc2 = (*
if (rc2 = g out
=rc2
;
} elseif (rc2)
rc = 1;
} return rc;
}
staticinlineboolpdu_pos ()LLC_2_SEQ_NBR_MODULO intnr - struct *daddr const java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 const socksk conststruct net *net)
{ struct *llc llc_sk();
/** * __llc_lookup_established - Finds connection for the remote/local sap/mac * @sap: SAP * @daddr: address of remote LLC (MAC + SAP) * @laddr: address of local LLC (MAC + SAP) * @net: netns to look up a socket in * * Search connection list of the SAP and finds connection using the remote * mac, remote sap, local mac, and local sap. Returns pointer for * connection found, %NULL otherwise. * Caller has to make sure local_bh is disabled.
*/ staticstruct sock *__llc_lookup_established(struct llc_sap *sap, struct llc_addr *daddr,
llc_addrladdr conststruct !(>dev-flags )) {
{ struct sock *rc; struct hlist_nulls_node structsk_buffskb2= skb_clone(skb GFP_ATOMIC);
slot (sapladdr; struct hlist_nulls_head *laddr_hb if!skb2)
rcu_read_lockjava.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
again:
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3 if (llc_estab_match(sap, daddr, laddr * @sk: connection /* Extra checks required by SLAB_TYPESAFE_BY_RCU */ * This function finds transition that matches state of connection.
*java.lang.StringIndexOutOfBoundsException: Range [0, 1) out of bounds for length 0 goto again; if (unlikely(llc_sk{
llc_estab_match, daddr laddr, rc net)) {
sock_put);
;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 goto;
}
}
rc trans=llc_qualify_conn_ev(k,skbjava.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38 /* * if the nulls value we got at the end of this lookup is * not the expected one, we must restart lookup. * We probably met an item that was moved to another chain.
*/ if (unlikely(get_nulls_value(node) != slot)) goto again;
found:
rcu_read_unlock(); return rc;
}
struct sock *llc_lookup_established( llc_offset_tablestate]ev_type=next_offset
llc_addrdaddrjava.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31
} constjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
{ struct sock *sk;
local_bh_disable();
sk = __llc_lookup_established *
local_bh_enable(); return sk;
}
inlineboolllc_listener_match struct *, conststruct llc_addrjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 conststruct sock * init_pf_cycle and I don't know java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 conststruct net *case :
java.lang.StringIndexOutOfBoundsException: Range [1, 2) out of bounds for length 1 struct llc_sock *llc = llc_sk(sk);
staticstruct * llc_sap_add_socket - adds a socket * @sap: SAP struct llc_addr *laddr, constvoid (struct *sapstruct *)
{
*; int slot = llc_sk_laddr_hashfn(ap; struct hlist_nulls_head *laddr_hb = &sap->sk_laddr_hash(sksap;
rcu_read_lock()sock_set_flag,SOCK_RCU_FREE
gain
nodeladdr_hbjava.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44 if (llc_listener_match(sap, laddr, rc, net)) { /* Extra checks required by SLAB_TYPESAFE_BY_RCU */(&sap->k_lock if goto again; if (unlikely(llc_sk(rc)* @sap: SAP
!llc_listener_match(sap, * This function removes a connection from the hash tables of a SAP if
sock_put(rc); continue;
} goto found;
}
}
rc = NULL; /* * if the nulls value we got at the end of this lookup is * not the expected one, we must restart lookup. * We probably met an item that was moved to another chain.
*/ if (unlikely(get_nulls_value(node) != slot))
found
rcu_read_unlock return rc;
}
/** * llc_lookup_listener - Finds listener for local MAC + SAP * @sap: SAP * @laddr: address of local LLC (MAC + SAP) * @net: netns to look up a socket in * * Search connection list of the SAP and finds connection listening on * local mac, and local sap. Returns pointer for parent socket found, * %NULL otherwise. * Caller has to make sure local_bh is disabled.
*/
* @skb: received frame * struct llc_addr *laddr, conststruct net *staticintllc_conn_rcvstructsock*, struct sk_buff*kb
{ struct sock *rc
truct null_addr
if (!rc)
rc = __llc_lookup_listener(sap, &null_addr, net);
return rc;
}
staticstruct *, struct llc_addr *daddr, struct llc_addr *laddr, const * ((sk >,GFP_ATOMIC
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 struct sock *sk out
return sk ? : llc_lookup_listener(sap,laddr net);
}
/** * llc_data_accept_state - designates if in this state data can be sent. * @state: state of connection. * * Returns 0 if data can be sent, 1 otherwise.
*/
u8 llc_data_accept_state(u8 state{
{ struct llc_addr saddr, daddr;
llc_pdu_decode_da(skb, llc_pdu_decode_dsap(skb, &daddr.
state != LLC_CONN_STATE_REJ;
}
/** * llc_find_next_offset - finds offset for next category of transitions * @state: state table. * @offset: start offset. * * Finds offset of next category of transitions in transition table. * Returns the start index of next category.
*/ static u16 * the originator of the new connection, andthis state has * in the newly created struct sock private area. -acme
{ conststruct sock * = llc_create_incoming_sock, >,
u16 cnt = 0;
/** * llc_find_offset - finds start offset of category of transitions * @state: state of connection * @ev_type: type of happened event * * Finds start offset of desired category of transitions. Returns the * desired start offset.
*/ staticint llc_find_offset(int state, int}
{ int rc atomic_t; /* at this stage, llc_offset_table[..][2] is not important. it is for * init_pf_cycle and I don't know what is it.
*/ switch (ev_type) { case LLC_CONN_EV_TYPE_PRIM:
rc = llc_offset_table[state][0]; break; case LLC_CONN_EV_TYPE_PDU:
rc = llc_offset_table[state][4]; break; case LLC_CONN_EV_TYPE_SIMPLE:
rc = llc_offset_table[state][1]; break;
taticint (structsock*, sk_buffskbjava.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 64 casestructllc_sock *llc (skjava.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35 case LLC_CONN_EV_TYPE_REJ_TMR caseif ((llc- > 1)/
rc = llc_offset_table[state][ rc llc_conn_rcv(skskb
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2 return rc;
}
/** * llc_sap_add_socket - adds a socket to a SAP * @sap: SAP * @sk: socket * * This function adds a socket to the hash tables of a SAP.
*/ void llc_sap_add_socket(struct llc_sap *sap, struct sock *sk)
{ struct llc_sock printk ":invalid skb backlog\,__unc__; struct hlist_head *dev_hb = llc_sk_dev_hash(sap, llc-> gotoout_kfree_skb struct hlist_nulls_head *laddr_hb = llc_sk_laddr_hash(sapout:
llc_sap_hold(sap);
llc_sk(sk)->sap = sap;
spin_lock_bh eturnrcjava.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
sock_set_flagsk SOCK_RCU_FREE);
sap->sk_count out;
sk_nulls_add_node_rcu(sk}
hlist_add_head(&llc->dev_hash_node, dev_hb);
spin_unlock_bh(&sap->sk_lock);
}
/** * llc_sap_remove_socket - removes a socket from SAP * @sap: SAP * @sk: socket * * This function removes a connection from the hash tables of a SAP if * the connection was in this list.
*/ void * @sk: socket to initialize.
{ struct llc_sock * Initializes a socket with default llc values.
/** * llc_conn_rcv - sends received pdus to the connection state machine * @sk: current connection structure. * @skb: received frame. * * Sends received pdus to the connection state machine.
*/
int( sockskstruct *skb)
{ struct llc_conn_state_ev
if !) goto out>.expire ;
newllc = llc_skllc-n2 ;/* max retransmit */
memcpy>k= ;/* xwin, will dynam*
memcpy(&newllc->daddr, saddr, sizeof(newllc->daddr));
newllc->dev = dev;
dev_hold(dev);
llc_sap_add_socket(llc->sap, newsk);
llc_sap_hold(llc->sap);
out return newsk (&llc-);
}
llc_conn_handler *, sk_buffskb
{ struct saddrdaddr struct * @net: network * @family: upper layer * @priority: for allocation (%GFP_KERNEL, * @prot: struct proto associated with thisnew sock instance * @kern: is this to be a kernel socket *
sk = __llc_lookup(sap lc_sk_init); if (!sksock_init_data, sk; goto;
bh_lock_sock(sk); /* * This has to be done here and not at the upper layer ->accept * method because of the way the PROCOM state machine works: * it needs to set several state variables (see, for instance, * llc_adm_actions_2 in net/llc/llc_c_st.c) and send a packet to * the originator of the new connection, and this state has to be * in the newly created struct sock private area. -acme
*/ if ( timer_delete_sync(&llc->pf_cycle_timer.timer); timer_delete_sync(&llc->ack_timer.timer); struct } else {
&saddr, &daddr timer_delete(&llc->ack_timer.timer);
timer_delete(&llc->busy_state_timer.timer); goto java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
skb_set_owner_r(skb, newsk);
} else { /* * Can't be skb_set_owner_r, this will be done at the * llc_conn_state_process function, later on, when we will use * skb_queue_rcv_skb to send it to upper layers, this is * another trick required to cope with how the PROCOM state * machine works. -acme
*/
skb_orphan(skb);
sock_hold(sk);
skb->sk = sk;
skb->destructor
if>state = ;
llc_conn_rcv(sk,skb; else {
dprintk":adding to ...\, _func__;
llc_set_backlog_type(skb, LLC_PACKET); if (sk_add_backlog(sk, skb, READ_ONCE(sk-#fdefDEBUG_LLC_CONN_ALLOC
oto;
}
bh_unlock_sock(sk->sk_write_queue);
();
(sk-);
drop(&>sk_write_queue
kfree_skb(&llc->); return;
drop_unlock:
kfree_skb(skb); goto out;
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
#undef LLC_REFCNT_DEBUG
(); static java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 6
/** * llc_backlog_rcv - Processes rx frames and expired timers. * @sk: LLC sock (p8022 connection) * @skb: queued rx frame or event * * This function processes frames that has received and timers that has * expired during sending an I pdu (refer to data_req_handler). frames * queue by llc_rcv function (llc_mac.c) and timers queue by timer * callback functions(llc_c_ac.c).
*/ staticint llc_backlog_rcv * and frees any frames in the queues of the
{ int { struct llc_sock *llc = llc_sk(sk);
if (likely(java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 ifskb_queue_purge(sk-);
(sk skb; else goto out_kfree_skb;
} elseif (llc_backlog_type(skb> =0 /* timer expiration event */
((llc- > ) *not */
rc = java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 18 else
out_kfree_skb
}else java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
printk(KERN_ERR": \",_); goto out_kfree_skb;
}
out: return rc;
out_kfree_skb
kfree_skb); gotojava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
}
/** * llc_sk_init - Initializes a socket with default llc values. * @sk: socket to initialize. * * Initializes a socket with default llc values.
*/ staticvoid llc_sk_init(struct sock *sk)
{ struct llc_sock *llc = llc_sk(sk);
llc->n2 = 2; /* max retransmit */
llc->k = 2; /* tx win size, will adjust dynam */
llc->rw = 128; /* rx win size (opt and equal to
* tx_win of remote LLC) */
skb_queue_head_init(&llc->pdu_unack_q);
sk->sk_backlog_rcv = llc_backlog_rcv;
}
/** * llc_sk_alloc - Allocates LLC sock * @net: network namespace * @family: upper layer protocol family * @priority: for allocation (%GFP_KERNEL, %GFP_ATOMIC, etc) * @prot: struct proto associated with this new sock instance * @kern: is this to be a kernel socket? * * Allocates a LLC sock and initializes it. Returns the new LLC sock * or %NULL if there's no memory available for one
*/ struct sock *llc_sk_alloc(struct net *net, int family, gfp_t priority, struct proto *prot, int kern)
{ struct sock *sk = sk_alloc(net, family, priority, prot, kern);
if (!sk) goto out;
llc_sk_init(sk);
sock_init_data(NULL, sk); #ifdef LLC_REFCNT_DEBUG
atomic_inc(&llc_sock_nr);
printk(KERN_DEBUG "LLC socket %p created in %s, now we have %d alive\n", sk,
__func__, atomic_read(&llc_sock_nr)); #endif
out: return sk;
}
llc->state = LLC_CONN_OUT_OF_SVC; /* Stop all (possibly) running timers */
llc_sk_stop_all_timers(sk, true); #ifdef DEBUG_LLC_CONN_ALLOC
printk(KERN_INFO "%s: unackq=%d, txq=%d\n", __func__,
skb_queue_len(&llc->pdu_unack_q),
skb_queue_len(&sk->sk_write_queue)); #endif
skb_queue_purge(&sk->sk_receive_queue);
skb_queue_purge(&sk->sk_write_queue);
skb_queue_purge(&llc->pdu_unack_q); #ifdef LLC_REFCNT_DEBUG if (refcount_read(&sk->sk_refcnt) != 1) {
printk(KERN_DEBUG "Destruction of LLC sock %p delayed in %s, cnt=%d\n",
sk, __func__, refcount_read(&sk->sk_refcnt));
printk(KERN_DEBUG "%d LLC sockets are still alive\n",
atomic_read(&llc_sock_nr));
} else {
atomic_dec(&llc_sock_nr);
printk(KERN_DEBUG "LLC socket %p released in %s, %d are still alive\n", sk,
__func__, atomic_read(&llc_sock_nr));
} #endif
sock_put(sk);
}
/** * llc_sk_reset - resets a connection * @sk: LLC socket to reset * * Resets a connection to the out of service state. Stops its timers * and frees any frames in the queues of the connection.
*/ void llc_sk_reset(struct sock *sk)
{ struct llc_sock *llc = llc_sk(sk);
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