+++ /dev/null
-/* transport.c: Rx Transport routines
- *
- * Copyright (C) 2002 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/slab.h>
-#include <linux/module.h>
-#include <rxrpc/transport.h>
-#include <rxrpc/peer.h>
-#include <rxrpc/connection.h>
-#include <rxrpc/call.h>
-#include <rxrpc/message.h>
-#include <rxrpc/krxiod.h>
-#include <rxrpc/krxsecd.h>
-#include <linux/udp.h>
-#include <linux/in.h>
-#include <linux/in6.h>
-#include <linux/icmp.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <net/ip.h>
-#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
-#include <linux/ipv6.h> /* this should _really_ be in errqueue.h.. */
-#endif
-#include <linux/errqueue.h>
-#include <asm/uaccess.h>
-#include "internal.h"
-
-struct errormsg {
- struct cmsghdr cmsg; /* control message header */
- struct sock_extended_err ee; /* extended error information */
- struct sockaddr_in icmp_src; /* ICMP packet source address */
-};
-
-static DEFINE_SPINLOCK(rxrpc_transports_lock);
-static struct list_head rxrpc_transports = LIST_HEAD_INIT(rxrpc_transports);
-
-__RXACCT_DECL(atomic_t rxrpc_transport_count);
-LIST_HEAD(rxrpc_proc_transports);
-DECLARE_RWSEM(rxrpc_proc_transports_sem);
-
-static void rxrpc_data_ready(struct sock *sk, int count);
-static void rxrpc_error_report(struct sock *sk);
-static int rxrpc_trans_receive_new_call(struct rxrpc_transport *trans,
- struct list_head *msgq);
-static void rxrpc_trans_receive_error_report(struct rxrpc_transport *trans);
-
-/*****************************************************************************/
-/*
- * create a new transport endpoint using the specified UDP port
- */
-int rxrpc_create_transport(unsigned short port,
- struct rxrpc_transport **_trans)
-{
- struct rxrpc_transport *trans;
- struct sockaddr_in sin;
- mm_segment_t oldfs;
- struct sock *sock;
- int ret, opt;
-
- _enter("%hu", port);
-
- trans = kzalloc(sizeof(struct rxrpc_transport), GFP_KERNEL);
- if (!trans)
- return -ENOMEM;
-
- atomic_set(&trans->usage, 1);
- INIT_LIST_HEAD(&trans->services);
- INIT_LIST_HEAD(&trans->link);
- INIT_LIST_HEAD(&trans->krxiodq_link);
- spin_lock_init(&trans->lock);
- INIT_LIST_HEAD(&trans->peer_active);
- INIT_LIST_HEAD(&trans->peer_graveyard);
- spin_lock_init(&trans->peer_gylock);
- init_waitqueue_head(&trans->peer_gy_waitq);
- rwlock_init(&trans->peer_lock);
- atomic_set(&trans->peer_count, 0);
- trans->port = port;
-
- /* create a UDP socket to be my actual transport endpoint */
- ret = sock_create_kern(PF_INET, SOCK_DGRAM, IPPROTO_UDP, &trans->socket);
- if (ret < 0)
- goto error;
-
- /* use the specified port */
- if (port) {
- memset(&sin, 0, sizeof(sin));
- sin.sin_family = AF_INET;
- sin.sin_port = htons(port);
- ret = trans->socket->ops->bind(trans->socket,
- (struct sockaddr *) &sin,
- sizeof(sin));
- if (ret < 0)
- goto error;
- }
-
- opt = 1;
- oldfs = get_fs();
- set_fs(KERNEL_DS);
- ret = trans->socket->ops->setsockopt(trans->socket, SOL_IP, IP_RECVERR,
- (char *) &opt, sizeof(opt));
- set_fs(oldfs);
-
- spin_lock(&rxrpc_transports_lock);
- list_add(&trans->link, &rxrpc_transports);
- spin_unlock(&rxrpc_transports_lock);
-
- /* set the socket up */
- sock = trans->socket->sk;
- sock->sk_user_data = trans;
- sock->sk_data_ready = rxrpc_data_ready;
- sock->sk_error_report = rxrpc_error_report;
-
- down_write(&rxrpc_proc_transports_sem);
- list_add_tail(&trans->proc_link, &rxrpc_proc_transports);
- up_write(&rxrpc_proc_transports_sem);
-
- __RXACCT(atomic_inc(&rxrpc_transport_count));
-
- *_trans = trans;
- _leave(" = 0 (%p)", trans);
- return 0;
-
- error:
- /* finish cleaning up the transport (not really needed here, but...) */
- if (trans->socket)
- trans->socket->ops->shutdown(trans->socket, 2);
-
- /* close the socket */
- if (trans->socket) {
- trans->socket->sk->sk_user_data = NULL;
- sock_release(trans->socket);
- trans->socket = NULL;
- }
-
- kfree(trans);
-
-
- _leave(" = %d", ret);
- return ret;
-} /* end rxrpc_create_transport() */
-
-/*****************************************************************************/
-/*
- * destroy a transport endpoint
- */
-void rxrpc_put_transport(struct rxrpc_transport *trans)
-{
- _enter("%p{u=%d p=%hu}",
- trans, atomic_read(&trans->usage), trans->port);
-
- BUG_ON(atomic_read(&trans->usage) <= 0);
-
- /* to prevent a race, the decrement and the dequeue must be
- * effectively atomic */
- spin_lock(&rxrpc_transports_lock);
- if (likely(!atomic_dec_and_test(&trans->usage))) {
- spin_unlock(&rxrpc_transports_lock);
- _leave("");
- return;
- }
-
- list_del(&trans->link);
- spin_unlock(&rxrpc_transports_lock);
-
- /* finish cleaning up the transport */
- if (trans->socket)
- trans->socket->ops->shutdown(trans->socket, 2);
-
- rxrpc_krxsecd_clear_transport(trans);
- rxrpc_krxiod_dequeue_transport(trans);
-
- /* discard all peer information */
- rxrpc_peer_clearall(trans);
-
- down_write(&rxrpc_proc_transports_sem);
- list_del(&trans->proc_link);
- up_write(&rxrpc_proc_transports_sem);
- __RXACCT(atomic_dec(&rxrpc_transport_count));
-
- /* close the socket */
- if (trans->socket) {
- trans->socket->sk->sk_user_data = NULL;
- sock_release(trans->socket);
- trans->socket = NULL;
- }
-
- kfree(trans);
-
- _leave("");
-} /* end rxrpc_put_transport() */
-
-/*****************************************************************************/
-/*
- * add a service to a transport to be listened upon
- */
-int rxrpc_add_service(struct rxrpc_transport *trans,
- struct rxrpc_service *newsrv)
-{
- struct rxrpc_service *srv;
- struct list_head *_p;
- int ret = -EEXIST;
-
- _enter("%p{%hu},%p{%hu}",
- trans, trans->port, newsrv, newsrv->service_id);
-
- /* verify that the service ID is not already present */
- spin_lock(&trans->lock);
-
- list_for_each(_p, &trans->services) {
- srv = list_entry(_p, struct rxrpc_service, link);
- if (srv->service_id == newsrv->service_id)
- goto out;
- }
-
- /* okay - add the transport to the list */
- list_add_tail(&newsrv->link, &trans->services);
- rxrpc_get_transport(trans);
- ret = 0;
-
- out:
- spin_unlock(&trans->lock);
-
- _leave("= %d", ret);
- return ret;
-} /* end rxrpc_add_service() */
-
-/*****************************************************************************/
-/*
- * remove a service from a transport
- */
-void rxrpc_del_service(struct rxrpc_transport *trans, struct rxrpc_service *srv)
-{
- _enter("%p{%hu},%p{%hu}", trans, trans->port, srv, srv->service_id);
-
- spin_lock(&trans->lock);
- list_del(&srv->link);
- spin_unlock(&trans->lock);
-
- rxrpc_put_transport(trans);
-
- _leave("");
-} /* end rxrpc_del_service() */
-
-/*****************************************************************************/
-/*
- * INET callback when data has been received on the socket.
- */
-static void rxrpc_data_ready(struct sock *sk, int count)
-{
- struct rxrpc_transport *trans;
-
- _enter("%p{t=%p},%d", sk, sk->sk_user_data, count);
-
- /* queue the transport for attention by krxiod */
- trans = (struct rxrpc_transport *) sk->sk_user_data;
- if (trans)
- rxrpc_krxiod_queue_transport(trans);
-
- /* wake up anyone waiting on the socket */
- if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
- wake_up_interruptible(sk->sk_sleep);
-
- _leave("");
-} /* end rxrpc_data_ready() */
-
-/*****************************************************************************/
-/*
- * INET callback when an ICMP error packet is received
- * - sk->err is error (EHOSTUNREACH, EPROTO or EMSGSIZE)
- */
-static void rxrpc_error_report(struct sock *sk)
-{
- struct rxrpc_transport *trans;
-
- _enter("%p{t=%p}", sk, sk->sk_user_data);
-
- /* queue the transport for attention by krxiod */
- trans = (struct rxrpc_transport *) sk->sk_user_data;
- if (trans) {
- trans->error_rcvd = 1;
- rxrpc_krxiod_queue_transport(trans);
- }
-
- /* wake up anyone waiting on the socket */
- if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
- wake_up_interruptible(sk->sk_sleep);
-
- _leave("");
-} /* end rxrpc_error_report() */
-
-/*****************************************************************************/
-/*
- * split a message up, allocating message records and filling them in
- * from the contents of a socket buffer
- */
-static int rxrpc_incoming_msg(struct rxrpc_transport *trans,
- struct sk_buff *pkt,
- struct list_head *msgq)
-{
- struct rxrpc_message *msg;
- int ret;
-
- _enter("");
-
- msg = kzalloc(sizeof(struct rxrpc_message), GFP_KERNEL);
- if (!msg) {
- _leave(" = -ENOMEM");
- return -ENOMEM;
- }
-
- atomic_set(&msg->usage, 1);
- list_add_tail(&msg->link,msgq);
-
- /* dig out the Rx routing parameters */
- if (skb_copy_bits(pkt, sizeof(struct udphdr),
- &msg->hdr, sizeof(msg->hdr)) < 0) {
- ret = -EBADMSG;
- goto error;
- }
-
- msg->trans = trans;
- msg->state = RXRPC_MSG_RECEIVED;
- skb_get_timestamp(pkt, &msg->stamp);
- if (msg->stamp.tv_sec == 0) {
- do_gettimeofday(&msg->stamp);
- if (pkt->sk)
- sock_enable_timestamp(pkt->sk);
- }
- msg->seq = ntohl(msg->hdr.seq);
-
- /* attach the packet */
- skb_get(pkt);
- msg->pkt = pkt;
-
- msg->offset = sizeof(struct udphdr) + sizeof(struct rxrpc_header);
- msg->dsize = msg->pkt->len - msg->offset;
-
- _net("Rx Received packet from %s (%08x;%08x,%1x,%d,%s,%02x,%d,%d)",
- msg->hdr.flags & RXRPC_CLIENT_INITIATED ? "client" : "server",
- ntohl(msg->hdr.epoch),
- (ntohl(msg->hdr.cid) & RXRPC_CIDMASK) >> RXRPC_CIDSHIFT,
- ntohl(msg->hdr.cid) & RXRPC_CHANNELMASK,
- ntohl(msg->hdr.callNumber),
- rxrpc_pkts[msg->hdr.type],
- msg->hdr.flags,
- ntohs(msg->hdr.serviceId),
- msg->hdr.securityIndex);
-
- __RXACCT(atomic_inc(&rxrpc_message_count));
-
- /* split off jumbo packets */
- while (msg->hdr.type == RXRPC_PACKET_TYPE_DATA &&
- msg->hdr.flags & RXRPC_JUMBO_PACKET
- ) {
- struct rxrpc_jumbo_header jumbo;
- struct rxrpc_message *jumbomsg = msg;
-
- _debug("split jumbo packet");
-
- /* quick sanity check */
- ret = -EBADMSG;
- if (msg->dsize <
- RXRPC_JUMBO_DATALEN + sizeof(struct rxrpc_jumbo_header))
- goto error;
- if (msg->hdr.flags & RXRPC_LAST_PACKET)
- goto error;
-
- /* dig out the secondary header */
- if (skb_copy_bits(pkt, msg->offset + RXRPC_JUMBO_DATALEN,
- &jumbo, sizeof(jumbo)) < 0)
- goto error;
-
- /* allocate a new message record */
- ret = -ENOMEM;
- msg = kmemdup(jumbomsg, sizeof(struct rxrpc_message), GFP_KERNEL);
- if (!msg)
- goto error;
-
- list_add_tail(&msg->link, msgq);
-
- /* adjust the jumbo packet */
- jumbomsg->dsize = RXRPC_JUMBO_DATALEN;
-
- /* attach the packet here too */
- skb_get(pkt);
-
- /* adjust the parameters */
- msg->seq++;
- msg->hdr.seq = htonl(msg->seq);
- msg->hdr.serial = htonl(ntohl(msg->hdr.serial) + 1);
- msg->offset += RXRPC_JUMBO_DATALEN +
- sizeof(struct rxrpc_jumbo_header);
- msg->dsize -= RXRPC_JUMBO_DATALEN +
- sizeof(struct rxrpc_jumbo_header);
- msg->hdr.flags = jumbo.flags;
- msg->hdr._rsvd = jumbo._rsvd;
-
- _net("Rx Split jumbo packet from %s"
- " (%08x;%08x,%1x,%d,%s,%02x,%d,%d)",
- msg->hdr.flags & RXRPC_CLIENT_INITIATED ? "client" : "server",
- ntohl(msg->hdr.epoch),
- (ntohl(msg->hdr.cid) & RXRPC_CIDMASK) >> RXRPC_CIDSHIFT,
- ntohl(msg->hdr.cid) & RXRPC_CHANNELMASK,
- ntohl(msg->hdr.callNumber),
- rxrpc_pkts[msg->hdr.type],
- msg->hdr.flags,
- ntohs(msg->hdr.serviceId),
- msg->hdr.securityIndex);
-
- __RXACCT(atomic_inc(&rxrpc_message_count));
- }
-
- _leave(" = 0 #%d", atomic_read(&rxrpc_message_count));
- return 0;
-
- error:
- while (!list_empty(msgq)) {
- msg = list_entry(msgq->next, struct rxrpc_message, link);
- list_del_init(&msg->link);
-
- rxrpc_put_message(msg);
- }
-
- _leave(" = %d", ret);
- return ret;
-} /* end rxrpc_incoming_msg() */
-
-/*****************************************************************************/
-/*
- * accept a new call
- * - called from krxiod in process context
- */
-void rxrpc_trans_receive_packet(struct rxrpc_transport *trans)
-{
- struct rxrpc_message *msg;
- struct rxrpc_peer *peer;
- struct sk_buff *pkt;
- int ret;
- __be32 addr;
- __be16 port;
-
- LIST_HEAD(msgq);
-
- _enter("%p{%d}", trans, trans->port);
-
- for (;;) {
- /* deal with outstanting errors first */
- if (trans->error_rcvd)
- rxrpc_trans_receive_error_report(trans);
-
- /* attempt to receive a packet */
- pkt = skb_recv_datagram(trans->socket->sk, 0, 1, &ret);
- if (!pkt) {
- if (ret == -EAGAIN) {
- _leave(" EAGAIN");
- return;
- }
-
- /* an icmp error may have occurred */
- rxrpc_krxiod_queue_transport(trans);
- _leave(" error %d\n", ret);
- return;
- }
-
- /* we'll probably need to checksum it (didn't call
- * sock_recvmsg) */
- if (skb_checksum_complete(pkt)) {
- kfree_skb(pkt);
- rxrpc_krxiod_queue_transport(trans);
- _leave(" CSUM failed");
- return;
- }
-
- addr = ip_hdr(pkt)->saddr;
- port = udp_hdr(pkt)->source;
-
- _net("Rx Received UDP packet from %08x:%04hu",
- ntohl(addr), ntohs(port));
-
- /* unmarshall the Rx parameters and split jumbo packets */
- ret = rxrpc_incoming_msg(trans, pkt, &msgq);
- if (ret < 0) {
- kfree_skb(pkt);
- rxrpc_krxiod_queue_transport(trans);
- _leave(" bad packet");
- return;
- }
-
- BUG_ON(list_empty(&msgq));
-
- msg = list_entry(msgq.next, struct rxrpc_message, link);
-
- /* locate the record for the peer from which it
- * originated */
- ret = rxrpc_peer_lookup(trans, addr, &peer);
- if (ret < 0) {
- kdebug("Rx No connections from that peer");
- rxrpc_trans_immediate_abort(trans, msg, -EINVAL);
- goto finished_msg;
- }
-
- /* try and find a matching connection */
- ret = rxrpc_connection_lookup(peer, msg, &msg->conn);
- if (ret < 0) {
- kdebug("Rx Unknown Connection");
- rxrpc_trans_immediate_abort(trans, msg, -EINVAL);
- rxrpc_put_peer(peer);
- goto finished_msg;
- }
- rxrpc_put_peer(peer);
-
- /* deal with the first packet of a new call */
- if (msg->hdr.flags & RXRPC_CLIENT_INITIATED &&
- msg->hdr.type == RXRPC_PACKET_TYPE_DATA &&
- ntohl(msg->hdr.seq) == 1
- ) {
- _debug("Rx New server call");
- rxrpc_trans_receive_new_call(trans, &msgq);
- goto finished_msg;
- }
-
- /* deal with subsequent packet(s) of call */
- _debug("Rx Call packet");
- while (!list_empty(&msgq)) {
- msg = list_entry(msgq.next, struct rxrpc_message, link);
- list_del_init(&msg->link);
-
- ret = rxrpc_conn_receive_call_packet(msg->conn, NULL, msg);
- if (ret < 0) {
- rxrpc_trans_immediate_abort(trans, msg, ret);
- rxrpc_put_message(msg);
- goto finished_msg;
- }
-
- rxrpc_put_message(msg);
- }
-
- goto finished_msg;
-
- /* dispose of the packets */
- finished_msg:
- while (!list_empty(&msgq)) {
- msg = list_entry(msgq.next, struct rxrpc_message, link);
- list_del_init(&msg->link);
-
- rxrpc_put_message(msg);
- }
- kfree_skb(pkt);
- }
-
- _leave("");
-
-} /* end rxrpc_trans_receive_packet() */
-
-/*****************************************************************************/
-/*
- * accept a new call from a client trying to connect to one of my services
- * - called in process context
- */
-static int rxrpc_trans_receive_new_call(struct rxrpc_transport *trans,
- struct list_head *msgq)
-{
- struct rxrpc_message *msg;
-
- _enter("");
-
- /* only bother with the first packet */
- msg = list_entry(msgq->next, struct rxrpc_message, link);
- list_del_init(&msg->link);
- rxrpc_krxsecd_queue_incoming_call(msg);
- rxrpc_put_message(msg);
-
- _leave(" = 0");
-
- return 0;
-} /* end rxrpc_trans_receive_new_call() */
-
-/*****************************************************************************/
-/*
- * perform an immediate abort without connection or call structures
- */
-int rxrpc_trans_immediate_abort(struct rxrpc_transport *trans,
- struct rxrpc_message *msg,
- int error)
-{
- struct rxrpc_header ahdr;
- struct sockaddr_in sin;
- struct msghdr msghdr;
- struct kvec iov[2];
- __be32 _error;
- int len, ret;
-
- _enter("%p,%p,%d", trans, msg, error);
-
- /* don't abort an abort packet */
- if (msg->hdr.type == RXRPC_PACKET_TYPE_ABORT) {
- _leave(" = 0");
- return 0;
- }
-
- _error = htonl(-error);
-
- /* set up the message to be transmitted */
- memcpy(&ahdr, &msg->hdr, sizeof(ahdr));
- ahdr.epoch = msg->hdr.epoch;
- ahdr.serial = htonl(1);
- ahdr.seq = 0;
- ahdr.type = RXRPC_PACKET_TYPE_ABORT;
- ahdr.flags = RXRPC_LAST_PACKET;
- ahdr.flags |= ~msg->hdr.flags & RXRPC_CLIENT_INITIATED;
-
- iov[0].iov_len = sizeof(ahdr);
- iov[0].iov_base = &ahdr;
- iov[1].iov_len = sizeof(_error);
- iov[1].iov_base = &_error;
-
- len = sizeof(ahdr) + sizeof(_error);
-
- memset(&sin,0,sizeof(sin));
- sin.sin_family = AF_INET;
- sin.sin_port = udp_hdr(msg->pkt)->source;
- sin.sin_addr.s_addr = ip_hdr(msg->pkt)->saddr;
-
- msghdr.msg_name = &sin;
- msghdr.msg_namelen = sizeof(sin);
- msghdr.msg_control = NULL;
- msghdr.msg_controllen = 0;
- msghdr.msg_flags = MSG_DONTWAIT;
-
- _net("Sending message type %d of %d bytes to %08x:%d",
- ahdr.type,
- len,
- ntohl(sin.sin_addr.s_addr),
- ntohs(sin.sin_port));
-
- /* send the message */
- ret = kernel_sendmsg(trans->socket, &msghdr, iov, 2, len);
-
- _leave(" = %d", ret);
- return ret;
-} /* end rxrpc_trans_immediate_abort() */
-
-/*****************************************************************************/
-/*
- * receive an ICMP error report and percolate it to all connections
- * heading to the affected host or port
- */
-static void rxrpc_trans_receive_error_report(struct rxrpc_transport *trans)
-{
- struct rxrpc_connection *conn;
- struct sockaddr_in sin;
- struct rxrpc_peer *peer;
- struct list_head connq, *_p;
- struct errormsg emsg;
- struct msghdr msg;
- __be16 port;
- int local, err;
-
- _enter("%p", trans);
-
- for (;;) {
- trans->error_rcvd = 0;
-
- /* try and receive an error message */
- msg.msg_name = &sin;
- msg.msg_namelen = sizeof(sin);
- msg.msg_control = &emsg;
- msg.msg_controllen = sizeof(emsg);
- msg.msg_flags = 0;
-
- err = kernel_recvmsg(trans->socket, &msg, NULL, 0, 0,
- MSG_ERRQUEUE | MSG_DONTWAIT | MSG_TRUNC);
-
- if (err == -EAGAIN) {
- _leave("");
- return;
- }
-
- if (err < 0) {
- printk("%s: unable to recv an error report: %d\n",
- __FUNCTION__, err);
- _leave("");
- return;
- }
-
- msg.msg_controllen = (char *) msg.msg_control - (char *) &emsg;
-
- if (msg.msg_controllen < sizeof(emsg.cmsg) ||
- msg.msg_namelen < sizeof(sin)) {
- printk("%s: short control message"
- " (nlen=%u clen=%Zu fl=%x)\n",
- __FUNCTION__,
- msg.msg_namelen,
- msg.msg_controllen,
- msg.msg_flags);
- continue;
- }
-
- _net("Rx Received control message"
- " { len=%Zu level=%u type=%u }",
- emsg.cmsg.cmsg_len,
- emsg.cmsg.cmsg_level,
- emsg.cmsg.cmsg_type);
-
- if (sin.sin_family != AF_INET) {
- printk("Rx Ignoring error report with non-INET address"
- " (fam=%u)",
- sin.sin_family);
- continue;
- }
-
- _net("Rx Received message pertaining to host addr=%x port=%hu",
- ntohl(sin.sin_addr.s_addr), ntohs(sin.sin_port));
-
- if (emsg.cmsg.cmsg_level != SOL_IP ||
- emsg.cmsg.cmsg_type != IP_RECVERR) {
- printk("Rx Ignoring unknown error report"
- " { level=%u type=%u }",
- emsg.cmsg.cmsg_level,
- emsg.cmsg.cmsg_type);
- continue;
- }
-
- if (msg.msg_controllen < sizeof(emsg.cmsg) + sizeof(emsg.ee)) {
- printk("%s: short error message (%Zu)\n",
- __FUNCTION__, msg.msg_controllen);
- _leave("");
- return;
- }
-
- port = sin.sin_port;
-
- switch (emsg.ee.ee_origin) {
- case SO_EE_ORIGIN_ICMP:
- local = 0;
- switch (emsg.ee.ee_type) {
- case ICMP_DEST_UNREACH:
- switch (emsg.ee.ee_code) {
- case ICMP_NET_UNREACH:
- _net("Rx Received ICMP Network Unreachable");
- port = 0;
- err = -ENETUNREACH;
- break;
- case ICMP_HOST_UNREACH:
- _net("Rx Received ICMP Host Unreachable");
- port = 0;
- err = -EHOSTUNREACH;
- break;
- case ICMP_PORT_UNREACH:
- _net("Rx Received ICMP Port Unreachable");
- err = -ECONNREFUSED;
- break;
- case ICMP_NET_UNKNOWN:
- _net("Rx Received ICMP Unknown Network");
- port = 0;
- err = -ENETUNREACH;
- break;
- case ICMP_HOST_UNKNOWN:
- _net("Rx Received ICMP Unknown Host");
- port = 0;
- err = -EHOSTUNREACH;
- break;
- default:
- _net("Rx Received ICMP DestUnreach { code=%u }",
- emsg.ee.ee_code);
- err = emsg.ee.ee_errno;
- break;
- }
- break;
-
- case ICMP_TIME_EXCEEDED:
- _net("Rx Received ICMP TTL Exceeded");
- err = emsg.ee.ee_errno;
- break;
-
- default:
- _proto("Rx Received ICMP error { type=%u code=%u }",
- emsg.ee.ee_type, emsg.ee.ee_code);
- err = emsg.ee.ee_errno;
- break;
- }
- break;
-
- case SO_EE_ORIGIN_LOCAL:
- _proto("Rx Received local error { error=%d }",
- emsg.ee.ee_errno);
- local = 1;
- err = emsg.ee.ee_errno;
- break;
-
- case SO_EE_ORIGIN_NONE:
- case SO_EE_ORIGIN_ICMP6:
- default:
- _proto("Rx Received error report { orig=%u }",
- emsg.ee.ee_origin);
- local = 0;
- err = emsg.ee.ee_errno;
- break;
- }
-
- /* find all the connections between this transport and the
- * affected destination */
- INIT_LIST_HEAD(&connq);
-
- if (rxrpc_peer_lookup(trans, sin.sin_addr.s_addr,
- &peer) == 0) {
- read_lock(&peer->conn_lock);
- list_for_each(_p, &peer->conn_active) {
- conn = list_entry(_p, struct rxrpc_connection,
- link);
- if (port && conn->addr.sin_port != port)
- continue;
- if (!list_empty(&conn->err_link))
- continue;
-
- rxrpc_get_connection(conn);
- list_add_tail(&conn->err_link, &connq);
- }
- read_unlock(&peer->conn_lock);
-
- /* service all those connections */
- while (!list_empty(&connq)) {
- conn = list_entry(connq.next,
- struct rxrpc_connection,
- err_link);
- list_del(&conn->err_link);
-
- rxrpc_conn_handle_error(conn, local, err);
-
- rxrpc_put_connection(conn);
- }
-
- rxrpc_put_peer(peer);
- }
- }
-
- _leave("");
- return;
-} /* end rxrpc_trans_receive_error_report() */
projects / powerpc.git / blobdiff