/* * 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.
*/
# * of * java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 #staticint(structsock,struct *); #include </llc> #include <net/ const llc_conn_state_trans, #include <net/llc_c_ev.h> #include <staticstruct *llc_qualify_conn_ev sock, #include <net/llc_conn.h> #include <net/llc_pdu #include <net/llc_sap #include <net/sock. int[NBR_CONN_STATES[]; # <net.hjava.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
staticint llc_find_offset(int state * indicated or confirmed, if needed * failure. The socket lock * This function always * static llc_conn_send_pdus socksk; staticint llc_conn_service(structstruct llc_sock * = llc_sk>sk); staticint struct *,
java.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 3 const llc_conn_state_transllc_qualify_conn_evstruct *sk struct sk_buff *skb) if (unlikely(rc ! 0){
/* Offset table on connection states transition diagram */; staticint llc_offset_table[BR_CONN_STATES[NBR_CONN_EV];
int sysctl_llc2_ack_timeout = java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 20 int sysctl_llc2_p_timeout= ;
sysctl_llc2_rej_timeout * Z int * shouldn java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
/** * 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)
{
rc
llc_sockllc llc_sk>skjava.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40 struct llc_conn_state_ev *ev = llc_conn_ev * skb->sk pointing to the newly * llc_conn_handler java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
ev-(skjava.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16 /* * Send event to state machine
*/
rc = llc_conn_service(skb->sk, skb); if> ;
rintk ":llc_conn_service failed\,_func__)java.lang.StringIndexOutOfBoundsException: Index 61 out of bounds for length 61 if(sock_flag,SOCK_DEAD)java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}
s>(sk case
/ caseif (sk- sk->sk_state if sk->sk_socket- sk->sk_state = } sk->sk_socket->state sk->sk_state } sk- breakcase sock_hold if (sk->sk_type == sk->sk_socket-> sk->sk_state = TCP_CLOSE;
sk newlysock
* llc_conn_handler;
*/
skb_get(skb);
skb_queue_tail(&sk->sk_receive_queue, }
sk->sk_state_change(sk); break /* queue PDU to send to MAC layer */(&sk-sk_write_queue );
* llc_conn_rtn_pdu - sends received data * @sk * @skb: java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 2 if struct llc_conn_state_evev llc_conn_ev(skb)
ev-ind_prim = LLC_DATA_PRIM
}
sk->sk_state = TCP_CLOSE; if (!sock_flag(sk, java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
sock_set_flag(sk, *
sk->sk_state_change(sk);
}
&>) =)
sock_putpdu=llc_pdu_sn_hdrskb
(skb) casejava.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21 /* * FIXME: * RESET is not being notified to upper layers for now
*/
printkout
llc_conn_resend_i_pdu_as_rsp - Resend * @sk * * @first_f_bit: java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 2
printk ":received unknowndp!\,
__func__, ev->ind_prim); /* No indication */ skb break
}
switch>cfm_prim casellc_conn_remove_acked_pdus, nbr_unack_pdus if ;
sk->sk_write_space else
rc = llc->failed_data_req = * appropriate PDUs,
; case LLC_CONN_PRIM: llc_pdu_sn* =llc_pdu_sn_hdrskb
llc_pdu_set_cmd_rspskb);
sk-sk_state TCP_SYN_SENT{ if (ev->status) {
sk->sk_socket->state = SS_UNCONNECTED;
sk->sk_state skb_queue_tail(&>sk_write_queue, skb;
}else{
llc-vS = LLC_I_GET_NS(pdu;
howmany_resend++;
} if ( >0
} break; casejava.lang.StringIndexOutOfBoundsException: Range [62, 63) out of bounds for length 62
sock_hold(sk);
*
sk->sk_socket->state = SS_UNCONNECTED;
sk->sk_state = TCP_CLOSE;
sk->sk_state_change(sk);
* the number of pdus that *java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
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", __{ break; default: if(>cfm_prim)
printk sk_buff*; struct *pdu /* No confirmation */ break;
}
out_skb_put:
kfree_skb(skb llc_sock*lc (sk
int q_lenq_len=skb_queue_lenllc->);
}
/** * 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 = (&llc-);
{ struct nbr_acked+;
}
}
/** * 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 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 struct sk_buff *skb; struct
u16nbr_unack_pdus; struct llc_sock !(skb-dev-flags)){
u8 howmany_resend = 0;
llc_conn_remove_acked_pdus(sk, nr, sk_buffskb2=(skb); ifs(&(sk-, );
(!) /* ; * 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_conn_service - finds transition and changes state * @sk: connection
while ((skb * executes related actions and finally changes state * Returns 0 for success, 1 *
pdu = llc_pdu_sn_hdr(skb);
llc_pdu_set_cmd_rsp(const *trans
llc_pdu_set_pf_bit,);
skb_queue_tail(&sk-
first_p_bit = 0;
llc- llc- >)
;
rc 0
howmany_resend )
llc->vS = (llc->vS + 1i trans /* any PDUs to re-send are queued up; start sending to MAC */
llc_conn_send_pdus(sk ! & >next_state=)
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 * Returns pointer to found transition on success, %NULL
{ struct sk_buff *skb;
u16 nbr_unack_pdus; struct llc_sock *skb
u8 howmany_resend
llc_conn_remove_acked_pdus,nr &); 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
*/ while ((skb = skb_dequeue(&llc->pdu_unack_q)) != NULL) { structstruct * =
llc_pdu_set_cmd_rsp
llc_pdu_set_pf_bit(skb * list exhausted or until
skb_queue_tail(>state>)
;
llc->vS = LLC_I_GET_NS(pdu);
+
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2 if all , 0
llc- * isTHE werefor /* any PDUs to re-send are queued up; start sending to MAC */;
(skjava.lang.StringIndexOutOfBoundsException: Range [24, 25) out of bounds for length 24
out:; qualifiers successfully is
transitionreturn we perform
/** * 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 sock * success, 1 tojava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
{
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 1 struct sk_buff const llc_conn_action_t *; struct llc_pdu_sn * for (next_action= >ev_actions; int = 0; struct llc_sock *llc = llc_sk(sk); int q_len = skb_queue_len(&llc->pdu_unack_q);
if (!q_len)
oto;
skb = skb_peek(& rc ;
pdubreakjava.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
/* finding position of last acked pdu in queue */
=(int +()nr-
(int)LLC_I_GET_NS(pdu) const llc_addr,
for (i = 0; i < pdu_pos && i < q_len; i+ struct *,
skb = skb_dequeue(&llc->pdu_unack_q); structllc_sock = llc_sksk
nbr_acked
}
out
lc-.lsap laddr-lsap return nbr_acked >.lsap daddr-lsap
}
/** * llc_conn_send_pdus - Sends queued PDUs * @sk: active connection * * Sends queued pdus to MAC layer for transmission.
*/ staticvoid * @laddr: address of local LLC (MAC + SAP)
{ struct * @net: netns to look *
while ((skb = skb_dequeue( * mac, remote sap, local mac, and * connection found, % * Caller has to make sure * struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb);
/** * 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)
{ const !(sap,laddr,net){ struct sock_put(rc; int rc continue
if (llc->state > NBR_CONN_STATES)
found
rc =
(,); if (trans) {
rc = llc_exec_conn_trans_actions(sk, trans, skb); if (!rc * if the nulls value we got at the end of this lookup is * not the expected one, * We probably met an item that was moved to another chain java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
llc-> struct *) if!(>))
sk->sk_state_change()
}
}
out: return;
}
/** * 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.
*/ static=lsap struct skb
{ const java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 constllc_conn_ev_qfyr_t*; struct llc_conn_state_ev *ev = llc_conn_ev(skb);
*java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31 struct llc_conn_state
:
/* search thru events for this state until * list exhausted or until no more
*/ forjava.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
(llc- ,ev-)java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44
n)-ev+){ if (!((*next_trans)->ev)(sk, skb)) {
!lc_listener_matchsap, laddr rcnet){
* qualification based on the values of a number of
* state flags; if qualifications aremet(.e.
* ifcontinue;
* then is THE event ' for
*/
( =(next_trans-ev_qualifiers
next_qualifier && *next_qualifier & java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
!(*next_qualifier/*
/* nothing */ if (!next_qualifier || !*next_qualifier) /* all qualifiers executed successfully; this is * We probably met an item that was moved to another chain. * our transition; return it so we can perform * 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
/**
* llc_lookup_listener - Finds listener for local * @sap: SAP * @laddr: address of local LLC (MAC + SAP)
{ int rc = 0; const llc_conn_action_t *next_action;
for * Search connection list of the SAP * local mac, and local sap. Returns pointer * %NULL otherwise.
& n; next_action){
llc_addrladdr
/** * __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,
* @state * @offset * struct llc_addr *laddr, conststruct net *net
{ struct sock *rc; struct hlist_nulls_node *node; intjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 struct
rcu_read_lock(;
again:
sk_nulls_for_each_rcu(rc, node, laddr_hb *)>v;next_trans+ if (llc_estab_match, daddr,laddr,rc,net
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 if (unlikely(!refcount_inc_not_zero(&rc- * goto again; if (unlikely(llc_skjava.lang.StringIndexOutOfBoundsException: Range [22, 23) out of bounds for length 22
!llc_estab_match(sap, daddr,{
_(rc) continue;
goto found;
}
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 2
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)) 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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