diff options
Diffstat (limited to 'net/rxrpc/ar-input.c')
| -rw-r--r-- | net/rxrpc/ar-input.c | 798 |
1 files changed, 0 insertions, 798 deletions
diff --git a/net/rxrpc/ar-input.c b/net/rxrpc/ar-input.c deleted file mode 100644 index 6ff97412a..000000000 --- a/net/rxrpc/ar-input.c +++ /dev/null @@ -1,798 +0,0 @@ -/* RxRPC packet reception - * - * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. - * Written by David Howells (dhowells@redhat.com) - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - */ - -#include <linux/module.h> -#include <linux/net.h> -#include <linux/skbuff.h> -#include <linux/errqueue.h> -#include <linux/udp.h> -#include <linux/in.h> -#include <linux/in6.h> -#include <linux/icmp.h> -#include <linux/gfp.h> -#include <net/sock.h> -#include <net/af_rxrpc.h> -#include <net/ip.h> -#include <net/udp.h> -#include <net/net_namespace.h> -#include "ar-internal.h" - -/* - * queue a packet for recvmsg to pass to userspace - * - the caller must hold a lock on call->lock - * - must not be called with interrupts disabled (sk_filter() disables BH's) - * - eats the packet whether successful or not - * - there must be just one reference to the packet, which the caller passes to - * this function - */ -int rxrpc_queue_rcv_skb(struct rxrpc_call *call, struct sk_buff *skb, - bool force, bool terminal) -{ - struct rxrpc_skb_priv *sp; - struct rxrpc_sock *rx = call->socket; - struct sock *sk; - int ret; - - _enter(",,%d,%d", force, terminal); - - ASSERT(!irqs_disabled()); - - sp = rxrpc_skb(skb); - ASSERTCMP(sp->call, ==, call); - - /* if we've already posted the terminal message for a call, then we - * don't post any more */ - if (test_bit(RXRPC_CALL_TERMINAL_MSG, &call->flags)) { - _debug("already terminated"); - ASSERTCMP(call->state, >=, RXRPC_CALL_COMPLETE); - skb->destructor = NULL; - sp->call = NULL; - rxrpc_put_call(call); - rxrpc_free_skb(skb); - return 0; - } - - sk = &rx->sk; - - if (!force) { - /* cast skb->rcvbuf to unsigned... It's pointless, but - * reduces number of warnings when compiling with -W - * --ANK */ -// ret = -ENOBUFS; -// if (atomic_read(&sk->sk_rmem_alloc) + skb->truesize >= -// (unsigned int) sk->sk_rcvbuf) -// goto out; - - ret = sk_filter(sk, skb); - if (ret < 0) - goto out; - } - - spin_lock_bh(&sk->sk_receive_queue.lock); - if (!test_bit(RXRPC_CALL_TERMINAL_MSG, &call->flags) && - !test_bit(RXRPC_CALL_RELEASED, &call->flags) && - call->socket->sk.sk_state != RXRPC_CLOSE) { - skb->destructor = rxrpc_packet_destructor; - skb->dev = NULL; - skb->sk = sk; - atomic_add(skb->truesize, &sk->sk_rmem_alloc); - - if (terminal) { - _debug("<<<< TERMINAL MESSAGE >>>>"); - set_bit(RXRPC_CALL_TERMINAL_MSG, &call->flags); - } - - /* allow interception by a kernel service */ - if (rx->interceptor) { - rx->interceptor(sk, call->user_call_ID, skb); - spin_unlock_bh(&sk->sk_receive_queue.lock); - } else { - _net("post skb %p", skb); - __skb_queue_tail(&sk->sk_receive_queue, skb); - spin_unlock_bh(&sk->sk_receive_queue.lock); - - if (!sock_flag(sk, SOCK_DEAD)) - sk->sk_data_ready(sk); - } - skb = NULL; - } else { - spin_unlock_bh(&sk->sk_receive_queue.lock); - } - ret = 0; - -out: - /* release the socket buffer */ - if (skb) { - skb->destructor = NULL; - sp->call = NULL; - rxrpc_put_call(call); - rxrpc_free_skb(skb); - } - - _leave(" = %d", ret); - return ret; -} - -/* - * process a DATA packet, posting the packet to the appropriate queue - * - eats the packet if successful - */ -static int rxrpc_fast_process_data(struct rxrpc_call *call, - struct sk_buff *skb, u32 seq) -{ - struct rxrpc_skb_priv *sp; - bool terminal; - int ret, ackbit, ack; - - _enter("{%u,%u},,{%u}", call->rx_data_post, call->rx_first_oos, seq); - - sp = rxrpc_skb(skb); - ASSERTCMP(sp->call, ==, NULL); - - spin_lock(&call->lock); - - if (call->state > RXRPC_CALL_COMPLETE) - goto discard; - - ASSERTCMP(call->rx_data_expect, >=, call->rx_data_post); - ASSERTCMP(call->rx_data_post, >=, call->rx_data_recv); - ASSERTCMP(call->rx_data_recv, >=, call->rx_data_eaten); - - if (seq < call->rx_data_post) { - _debug("dup #%u [-%u]", seq, call->rx_data_post); - ack = RXRPC_ACK_DUPLICATE; - ret = -ENOBUFS; - goto discard_and_ack; - } - - /* we may already have the packet in the out of sequence queue */ - ackbit = seq - (call->rx_data_eaten + 1); - ASSERTCMP(ackbit, >=, 0); - if (__test_and_set_bit(ackbit, call->ackr_window)) { - _debug("dup oos #%u [%u,%u]", - seq, call->rx_data_eaten, call->rx_data_post); - ack = RXRPC_ACK_DUPLICATE; - goto discard_and_ack; - } - - if (seq >= call->ackr_win_top) { - _debug("exceed #%u [%u]", seq, call->ackr_win_top); - __clear_bit(ackbit, call->ackr_window); - ack = RXRPC_ACK_EXCEEDS_WINDOW; - goto discard_and_ack; - } - - if (seq == call->rx_data_expect) { - clear_bit(RXRPC_CALL_EXPECT_OOS, &call->flags); - call->rx_data_expect++; - } else if (seq > call->rx_data_expect) { - _debug("oos #%u [%u]", seq, call->rx_data_expect); - call->rx_data_expect = seq + 1; - if (test_and_set_bit(RXRPC_CALL_EXPECT_OOS, &call->flags)) { - ack = RXRPC_ACK_OUT_OF_SEQUENCE; - goto enqueue_and_ack; - } - goto enqueue_packet; - } - - if (seq != call->rx_data_post) { - _debug("ahead #%u [%u]", seq, call->rx_data_post); - goto enqueue_packet; - } - - if (test_bit(RXRPC_CALL_RCVD_LAST, &call->flags)) - goto protocol_error; - - /* if the packet need security things doing to it, then it goes down - * the slow path */ - if (call->conn->security_ix) - goto enqueue_packet; - - sp->call = call; - rxrpc_get_call(call); - terminal = ((sp->hdr.flags & RXRPC_LAST_PACKET) && - !(sp->hdr.flags & RXRPC_CLIENT_INITIATED)); - ret = rxrpc_queue_rcv_skb(call, skb, false, terminal); - if (ret < 0) { - if (ret == -ENOMEM || ret == -ENOBUFS) { - __clear_bit(ackbit, call->ackr_window); - ack = RXRPC_ACK_NOSPACE; - goto discard_and_ack; - } - goto out; - } - - skb = NULL; - - _debug("post #%u", seq); - ASSERTCMP(call->rx_data_post, ==, seq); - call->rx_data_post++; - - if (sp->hdr.flags & RXRPC_LAST_PACKET) - set_bit(RXRPC_CALL_RCVD_LAST, &call->flags); - - /* if we've reached an out of sequence packet then we need to drain - * that queue into the socket Rx queue now */ - if (call->rx_data_post == call->rx_first_oos) { - _debug("drain rx oos now"); - read_lock(&call->state_lock); - if (call->state < RXRPC_CALL_COMPLETE && - !test_and_set_bit(RXRPC_CALL_EV_DRAIN_RX_OOS, &call->events)) - rxrpc_queue_call(call); - read_unlock(&call->state_lock); - } - - spin_unlock(&call->lock); - atomic_inc(&call->ackr_not_idle); - rxrpc_propose_ACK(call, RXRPC_ACK_DELAY, sp->hdr.serial, false); - _leave(" = 0 [posted]"); - return 0; - -protocol_error: - ret = -EBADMSG; -out: - spin_unlock(&call->lock); - _leave(" = %d", ret); - return ret; - -discard_and_ack: - _debug("discard and ACK packet %p", skb); - __rxrpc_propose_ACK(call, ack, sp->hdr.serial, true); -discard: - spin_unlock(&call->lock); - rxrpc_free_skb(skb); - _leave(" = 0 [discarded]"); - return 0; - -enqueue_and_ack: - __rxrpc_propose_ACK(call, ack, sp->hdr.serial, true); -enqueue_packet: - _net("defer skb %p", skb); - spin_unlock(&call->lock); - skb_queue_tail(&call->rx_queue, skb); - atomic_inc(&call->ackr_not_idle); - read_lock(&call->state_lock); - if (call->state < RXRPC_CALL_DEAD) - rxrpc_queue_call(call); - read_unlock(&call->state_lock); - _leave(" = 0 [queued]"); - return 0; -} - -/* - * assume an implicit ACKALL of the transmission phase of a client socket upon - * reception of the first reply packet - */ -static void rxrpc_assume_implicit_ackall(struct rxrpc_call *call, u32 serial) -{ - write_lock_bh(&call->state_lock); - - switch (call->state) { - case RXRPC_CALL_CLIENT_AWAIT_REPLY: - call->state = RXRPC_CALL_CLIENT_RECV_REPLY; - call->acks_latest = serial; - - _debug("implicit ACKALL %%%u", call->acks_latest); - set_bit(RXRPC_CALL_EV_RCVD_ACKALL, &call->events); - write_unlock_bh(&call->state_lock); - - if (try_to_del_timer_sync(&call->resend_timer) >= 0) { - clear_bit(RXRPC_CALL_EV_RESEND_TIMER, &call->events); - clear_bit(RXRPC_CALL_EV_RESEND, &call->events); - clear_bit(RXRPC_CALL_RUN_RTIMER, &call->flags); - } - break; - - default: - write_unlock_bh(&call->state_lock); - break; - } -} - -/* - * post an incoming packet to the nominated call to deal with - * - must get rid of the sk_buff, either by freeing it or by queuing it - */ -void rxrpc_fast_process_packet(struct rxrpc_call *call, struct sk_buff *skb) -{ - struct rxrpc_skb_priv *sp = rxrpc_skb(skb); - __be32 wtmp; - u32 hi_serial, abort_code; - - _enter("%p,%p", call, skb); - - ASSERT(!irqs_disabled()); - -#if 0 // INJECT RX ERROR - if (sp->hdr.type == RXRPC_PACKET_TYPE_DATA) { - static int skip = 0; - if (++skip == 3) { - printk("DROPPED 3RD PACKET!!!!!!!!!!!!!\n"); - skip = 0; - goto free_packet; - } - } -#endif - - /* track the latest serial number on this connection for ACK packet - * information */ - hi_serial = atomic_read(&call->conn->hi_serial); - while (sp->hdr.serial > hi_serial) - hi_serial = atomic_cmpxchg(&call->conn->hi_serial, hi_serial, - sp->hdr.serial); - - /* request ACK generation for any ACK or DATA packet that requests - * it */ - if (sp->hdr.flags & RXRPC_REQUEST_ACK) { - _proto("ACK Requested on %%%u", sp->hdr.serial); - rxrpc_propose_ACK(call, RXRPC_ACK_REQUESTED, sp->hdr.serial, false); - } - - switch (sp->hdr.type) { - case RXRPC_PACKET_TYPE_ABORT: - _debug("abort"); - - if (skb_copy_bits(skb, 0, &wtmp, sizeof(wtmp)) < 0) - goto protocol_error; - - abort_code = ntohl(wtmp); - _proto("Rx ABORT %%%u { %x }", sp->hdr.serial, abort_code); - - write_lock_bh(&call->state_lock); - if (call->state < RXRPC_CALL_COMPLETE) { - call->state = RXRPC_CALL_REMOTELY_ABORTED; - call->remote_abort = abort_code; - set_bit(RXRPC_CALL_EV_RCVD_ABORT, &call->events); - rxrpc_queue_call(call); - } - goto free_packet_unlock; - - case RXRPC_PACKET_TYPE_BUSY: - _proto("Rx BUSY %%%u", sp->hdr.serial); - - if (call->conn->out_clientflag) - goto protocol_error; - - write_lock_bh(&call->state_lock); - switch (call->state) { - case RXRPC_CALL_CLIENT_SEND_REQUEST: - call->state = RXRPC_CALL_SERVER_BUSY; - set_bit(RXRPC_CALL_EV_RCVD_BUSY, &call->events); - rxrpc_queue_call(call); - case RXRPC_CALL_SERVER_BUSY: - goto free_packet_unlock; - default: - goto protocol_error_locked; - } - - default: - _proto("Rx %s %%%u", rxrpc_pkts[sp->hdr.type], sp->hdr.serial); - goto protocol_error; - - case RXRPC_PACKET_TYPE_DATA: - _proto("Rx DATA %%%u { #%u }", sp->hdr.serial, sp->hdr.seq); - - if (sp->hdr.seq == 0) - goto protocol_error; - - call->ackr_prev_seq = sp->hdr.seq; - - /* received data implicitly ACKs all of the request packets we - * sent when we're acting as a client */ - if (call->state == RXRPC_CALL_CLIENT_AWAIT_REPLY) - rxrpc_assume_implicit_ackall(call, sp->hdr.serial); - - switch (rxrpc_fast_process_data(call, skb, sp->hdr.seq)) { - case 0: - skb = NULL; - goto done; - - default: - BUG(); - - /* data packet received beyond the last packet */ - case -EBADMSG: - goto protocol_error; - } - - case RXRPC_PACKET_TYPE_ACKALL: - case RXRPC_PACKET_TYPE_ACK: - /* ACK processing is done in process context */ - read_lock_bh(&call->state_lock); - if (call->state < RXRPC_CALL_DEAD) { - skb_queue_tail(&call->rx_queue, skb); - rxrpc_queue_call(call); - skb = NULL; - } - read_unlock_bh(&call->state_lock); - goto free_packet; - } - -protocol_error: - _debug("protocol error"); - write_lock_bh(&call->state_lock); -protocol_error_locked: - if (call->state <= RXRPC_CALL_COMPLETE) { - call->state = RXRPC_CALL_LOCALLY_ABORTED; - call->local_abort = RX_PROTOCOL_ERROR; - set_bit(RXRPC_CALL_EV_ABORT, &call->events); - rxrpc_queue_call(call); - } -free_packet_unlock: - write_unlock_bh(&call->state_lock); -free_packet: - rxrpc_free_skb(skb); -done: - _leave(""); -} - -/* - * split up a jumbo data packet - */ -static void rxrpc_process_jumbo_packet(struct rxrpc_call *call, - struct sk_buff *jumbo) -{ - struct rxrpc_jumbo_header jhdr; - struct rxrpc_skb_priv *sp; - struct sk_buff *part; - - _enter(",{%u,%u}", jumbo->data_len, jumbo->len); - - sp = rxrpc_skb(jumbo); - - do { - sp->hdr.flags &= ~RXRPC_JUMBO_PACKET; - - /* make a clone to represent the first subpacket in what's left - * of the jumbo packet */ - part = skb_clone(jumbo, GFP_ATOMIC); - if (!part) { - /* simply ditch the tail in the event of ENOMEM */ - pskb_trim(jumbo, RXRPC_JUMBO_DATALEN); - break; - } - rxrpc_new_skb(part); - - pskb_trim(part, RXRPC_JUMBO_DATALEN); - - if (!pskb_pull(jumbo, RXRPC_JUMBO_DATALEN)) - goto protocol_error; - - if (skb_copy_bits(jumbo, 0, &jhdr, sizeof(jhdr)) < 0) - goto protocol_error; - if (!pskb_pull(jumbo, sizeof(jhdr))) - BUG(); - - sp->hdr.seq += 1; - sp->hdr.serial += 1; - sp->hdr.flags = jhdr.flags; - sp->hdr._rsvd = jhdr._rsvd; - - _proto("Rx DATA Jumbo %%%u", sp->hdr.serial - 1); - - rxrpc_fast_process_packet(call, part); - part = NULL; - - } while (sp->hdr.flags & RXRPC_JUMBO_PACKET); - - rxrpc_fast_process_packet(call, jumbo); - _leave(""); - return; - -protocol_error: - _debug("protocol error"); - rxrpc_free_skb(part); - rxrpc_free_skb(jumbo); - write_lock_bh(&call->state_lock); - if (call->state <= RXRPC_CALL_COMPLETE) { - call->state = RXRPC_CALL_LOCALLY_ABORTED; - call->local_abort = RX_PROTOCOL_ERROR; - set_bit(RXRPC_CALL_EV_ABORT, &call->events); - rxrpc_queue_call(call); - } - write_unlock_bh(&call->state_lock); - _leave(""); -} - -/* - * post an incoming packet to the appropriate call/socket to deal with - * - must get rid of the sk_buff, either by freeing it or by queuing it - */ -static void rxrpc_post_packet_to_call(struct rxrpc_call *call, - struct sk_buff *skb) -{ - struct rxrpc_skb_priv *sp; - - _enter("%p,%p", call, skb); - - sp = rxrpc_skb(skb); - - _debug("extant call [%d]", call->state); - - read_lock(&call->state_lock); - switch (call->state) { - case RXRPC_CALL_LOCALLY_ABORTED: - if (!test_and_set_bit(RXRPC_CALL_EV_ABORT, &call->events)) { - rxrpc_queue_call(call); - goto free_unlock; - } - case RXRPC_CALL_REMOTELY_ABORTED: - case RXRPC_CALL_NETWORK_ERROR: - case RXRPC_CALL_DEAD: - goto dead_call; - case RXRPC_CALL_COMPLETE: - case RXRPC_CALL_CLIENT_FINAL_ACK: - /* complete server call */ - if (call->conn->in_clientflag) - goto dead_call; - /* resend last packet of a completed call */ - _debug("final ack again"); - rxrpc_get_call(call); - set_bit(RXRPC_CALL_EV_ACK_FINAL, &call->events); - rxrpc_queue_call(call); - goto free_unlock; - default: - break; - } - - read_unlock(&call->state_lock); - rxrpc_get_call(call); - - if (sp->hdr.type == RXRPC_PACKET_TYPE_DATA && - sp->hdr.flags & RXRPC_JUMBO_PACKET) - rxrpc_process_jumbo_packet(call, skb); - else - rxrpc_fast_process_packet(call, skb); - - rxrpc_put_call(call); - goto done; - -dead_call: - if (sp->hdr.type != RXRPC_PACKET_TYPE_ABORT) { - skb->priority = RX_CALL_DEAD; - rxrpc_reject_packet(call->conn->trans->local, skb); - goto unlock; - } -free_unlock: - rxrpc_free_skb(skb); -unlock: - read_unlock(&call->state_lock); -done: - _leave(""); -} - -/* - * post connection-level events to the connection - * - this includes challenges, responses and some aborts - */ -static void rxrpc_post_packet_to_conn(struct rxrpc_connection *conn, - struct sk_buff *skb) -{ - _enter("%p,%p", conn, skb); - - atomic_inc(&conn->usage); - skb_queue_tail(&conn->rx_queue, skb); - rxrpc_queue_conn(conn); -} - -/* - * post endpoint-level events to the local endpoint - * - this includes debug and version messages - */ -static void rxrpc_post_packet_to_local(struct rxrpc_local *local, - struct sk_buff *skb) -{ - _enter("%p,%p", local, skb); - - atomic_inc(&local->usage); - skb_queue_tail(&local->event_queue, skb); - rxrpc_queue_work(&local->event_processor); -} - -/* - * Extract the wire header from a packet and translate the byte order. - */ -static noinline -int rxrpc_extract_header(struct rxrpc_skb_priv *sp, struct sk_buff *skb) -{ - struct rxrpc_wire_header whdr; - - /* dig out the RxRPC connection details */ - if (skb_copy_bits(skb, 0, &whdr, sizeof(whdr)) < 0) - return -EBADMSG; - if (!pskb_pull(skb, sizeof(whdr))) - BUG(); - - memset(sp, 0, sizeof(*sp)); - sp->hdr.epoch = ntohl(whdr.epoch); - sp->hdr.cid = ntohl(whdr.cid); - sp->hdr.callNumber = ntohl(whdr.callNumber); - sp->hdr.seq = ntohl(whdr.seq); - sp->hdr.serial = ntohl(whdr.serial); - sp->hdr.flags = whdr.flags; - sp->hdr.type = whdr.type; - sp->hdr.userStatus = whdr.userStatus; - sp->hdr.securityIndex = whdr.securityIndex; - sp->hdr._rsvd = ntohs(whdr._rsvd); - sp->hdr.serviceId = ntohs(whdr.serviceId); - return 0; -} - -static struct rxrpc_connection *rxrpc_conn_from_local(struct rxrpc_local *local, - struct sk_buff *skb, - struct rxrpc_skb_priv *sp) -{ - struct rxrpc_peer *peer; - struct rxrpc_transport *trans; - struct rxrpc_connection *conn; - - peer = rxrpc_find_peer(local, ip_hdr(skb)->saddr, - udp_hdr(skb)->source); - if (IS_ERR(peer)) - goto cant_find_conn; - - trans = rxrpc_find_transport(local, peer); - rxrpc_put_peer(peer); - if (!trans) - goto cant_find_conn; - - conn = rxrpc_find_connection(trans, &sp->hdr); - rxrpc_put_transport(trans); - if (!conn) - goto cant_find_conn; - - return conn; -cant_find_conn: - return NULL; -} - -/* - * handle data received on the local endpoint - * - may be called in interrupt context - */ -void rxrpc_data_ready(struct sock *sk) -{ - struct rxrpc_skb_priv *sp; - struct rxrpc_local *local; - struct sk_buff *skb; - int ret; - - _enter("%p", sk); - - ASSERT(!irqs_disabled()); - - read_lock_bh(&rxrpc_local_lock); - local = sk->sk_user_data; - if (local && atomic_read(&local->usage) > 0) - rxrpc_get_local(local); - else - local = NULL; - read_unlock_bh(&rxrpc_local_lock); - if (!local) { - _leave(" [local dead]"); - return; - } - - skb = skb_recv_datagram(sk, 0, 1, &ret); - if (!skb) { - rxrpc_put_local(local); - if (ret == -EAGAIN) - return; - _debug("UDP socket error %d", ret); - return; - } - - rxrpc_new_skb(skb); - - _net("recv skb %p", skb); - - /* we'll probably need to checksum it (didn't call sock_recvmsg) */ - if (skb_checksum_complete(skb)) { - rxrpc_free_skb(skb); - rxrpc_put_local(local); - __UDP_INC_STATS(&init_net, UDP_MIB_INERRORS, 0); - _leave(" [CSUM failed]"); - return; - } - - __UDP_INC_STATS(&init_net, UDP_MIB_INDATAGRAMS, 0); - - /* The socket buffer we have is owned by UDP, with UDP's data all over - * it, but we really want our own data there. - */ - skb_orphan(skb); - sp = rxrpc_skb(skb); - - _net("Rx UDP packet from %08x:%04hu", - ntohl(ip_hdr(skb)->saddr), ntohs(udp_hdr(skb)->source)); - - /* dig out the RxRPC connection details */ - if (rxrpc_extract_header(sp, skb) < 0) - goto bad_message; - - _net("Rx RxRPC %s ep=%x call=%x:%x", - sp->hdr.flags & RXRPC_CLIENT_INITIATED ? "ToServer" : "ToClient", - sp->hdr.epoch, sp->hdr.cid, sp->hdr.callNumber); - - if (sp->hdr.type >= RXRPC_N_PACKET_TYPES || - !((RXRPC_SUPPORTED_PACKET_TYPES >> sp->hdr.type) & 1)) { - _proto("Rx Bad Packet Type %u", sp->hdr.type); - goto bad_message; - } - - if (sp->hdr.type == RXRPC_PACKET_TYPE_VERSION) { - rxrpc_post_packet_to_local(local, skb); - goto out; - } - - if (sp->hdr.type == RXRPC_PACKET_TYPE_DATA && - (sp->hdr.callNumber == 0 || sp->hdr.seq == 0)) - goto bad_message; - - if (sp->hdr.callNumber == 0) { - /* This is a connection-level packet. These should be - * fairly rare, so the extra overhead of looking them up the - * old-fashioned way doesn't really hurt */ - struct rxrpc_connection *conn; - - conn = rxrpc_conn_from_local(local, skb, sp); - if (!conn) - goto cant_route_call; - - _debug("CONN %p {%d}", conn, conn->debug_id); - rxrpc_post_packet_to_conn(conn, skb); - rxrpc_put_connection(conn); - } else { - struct rxrpc_call *call; - - call = rxrpc_find_call_hash(&sp->hdr, local, - AF_INET, &ip_hdr(skb)->saddr); - if (call) - rxrpc_post_packet_to_call(call, skb); - else - goto cant_route_call; - } - -out: - rxrpc_put_local(local); - return; - -cant_route_call: - _debug("can't route call"); - if (sp->hdr.flags & RXRPC_CLIENT_INITIATED && - sp->hdr.type == RXRPC_PACKET_TYPE_DATA) { - if (sp->hdr.seq == 1) { - _debug("first packet"); - skb_queue_tail(&local->accept_queue, skb); - rxrpc_queue_work(&local->acceptor); - rxrpc_put_local(local); - _leave(" [incoming]"); - return; - } - skb->priority = RX_INVALID_OPERATION; - } else { - skb->priority = RX_CALL_DEAD; - } - - if (sp->hdr.type != RXRPC_PACKET_TYPE_ABORT) { - _debug("reject type %d",sp->hdr.type); - rxrpc_reject_packet(local, skb); - } - rxrpc_put_local(local); - _leave(" [no call]"); - return; - -bad_message: - skb->priority = RX_PROTOCOL_ERROR; - rxrpc_reject_packet(local, skb); - rxrpc_put_local(local); - _leave(" [badmsg]"); -} |