116 lines
2.7 KiB
C
116 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/* AF_RXRPC local endpoint management
|
|
*
|
|
* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
*/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/net.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/slab.h>
|
|
#include <net/sock.h>
|
|
#include <net/af_rxrpc.h>
|
|
#include <generated/utsrelease.h>
|
|
#include "ar-internal.h"
|
|
|
|
static const char rxrpc_version_string[65] = "linux-" UTS_RELEASE " AF_RXRPC";
|
|
|
|
/*
|
|
* Reply to a version request
|
|
*/
|
|
static void rxrpc_send_version_request(struct rxrpc_local *local,
|
|
struct rxrpc_host_header *hdr,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct rxrpc_wire_header whdr;
|
|
struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
|
|
struct sockaddr_rxrpc srx;
|
|
struct msghdr msg;
|
|
struct kvec iov[2];
|
|
size_t len;
|
|
int ret;
|
|
|
|
_enter("");
|
|
|
|
if (rxrpc_extract_addr_from_skb(&srx, skb) < 0)
|
|
return;
|
|
|
|
msg.msg_name = &srx.transport;
|
|
msg.msg_namelen = srx.transport_len;
|
|
msg.msg_control = NULL;
|
|
msg.msg_controllen = 0;
|
|
msg.msg_flags = 0;
|
|
|
|
whdr.epoch = htonl(sp->hdr.epoch);
|
|
whdr.cid = htonl(sp->hdr.cid);
|
|
whdr.callNumber = htonl(sp->hdr.callNumber);
|
|
whdr.seq = 0;
|
|
whdr.serial = 0;
|
|
whdr.type = RXRPC_PACKET_TYPE_VERSION;
|
|
whdr.flags = RXRPC_LAST_PACKET | (~hdr->flags & RXRPC_CLIENT_INITIATED);
|
|
whdr.userStatus = 0;
|
|
whdr.securityIndex = 0;
|
|
whdr._rsvd = 0;
|
|
whdr.serviceId = htons(sp->hdr.serviceId);
|
|
|
|
iov[0].iov_base = &whdr;
|
|
iov[0].iov_len = sizeof(whdr);
|
|
iov[1].iov_base = (char *)rxrpc_version_string;
|
|
iov[1].iov_len = sizeof(rxrpc_version_string);
|
|
|
|
len = iov[0].iov_len + iov[1].iov_len;
|
|
|
|
_proto("Tx VERSION (reply)");
|
|
|
|
ret = kernel_sendmsg(local->socket, &msg, iov, 2, len);
|
|
if (ret < 0)
|
|
trace_rxrpc_tx_fail(local->debug_id, 0, ret,
|
|
rxrpc_tx_point_version_reply);
|
|
else
|
|
trace_rxrpc_tx_packet(local->debug_id, &whdr,
|
|
rxrpc_tx_point_version_reply);
|
|
|
|
_leave("");
|
|
}
|
|
|
|
/*
|
|
* Process event packets targetted at a local endpoint.
|
|
*/
|
|
void rxrpc_process_local_events(struct rxrpc_local *local)
|
|
{
|
|
struct sk_buff *skb;
|
|
char v;
|
|
|
|
_enter("");
|
|
|
|
skb = skb_dequeue(&local->event_queue);
|
|
if (skb) {
|
|
struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
|
|
|
|
rxrpc_see_skb(skb, rxrpc_skb_rx_seen);
|
|
_debug("{%d},{%u}", local->debug_id, sp->hdr.type);
|
|
|
|
switch (sp->hdr.type) {
|
|
case RXRPC_PACKET_TYPE_VERSION:
|
|
if (skb_copy_bits(skb, sizeof(struct rxrpc_wire_header),
|
|
&v, 1) < 0)
|
|
return;
|
|
_proto("Rx VERSION { %02x }", v);
|
|
if (v == 0)
|
|
rxrpc_send_version_request(local, &sp->hdr, skb);
|
|
break;
|
|
|
|
default:
|
|
/* Just ignore anything we don't understand */
|
|
break;
|
|
}
|
|
|
|
rxrpc_free_skb(skb, rxrpc_skb_rx_freed);
|
|
}
|
|
|
|
_leave("");
|
|
}
|