85 lines
2.0 KiB
C
85 lines
2.0 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/* AF_RXRPC local endpoint management
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*
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* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/net.h>
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#include <linux/skbuff.h>
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#include <linux/slab.h>
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#include <net/sock.h>
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#include <net/af_rxrpc.h>
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#include <generated/utsrelease.h>
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#include "ar-internal.h"
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static char rxrpc_version_string[65]; // "linux-" UTS_RELEASE " AF_RXRPC";
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/*
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* Generate the VERSION packet string.
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*/
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void rxrpc_gen_version_string(void)
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{
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snprintf(rxrpc_version_string, sizeof(rxrpc_version_string),
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"linux-%.49s AF_RXRPC", UTS_RELEASE);
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}
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/*
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* Reply to a version request
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*/
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void rxrpc_send_version_request(struct rxrpc_local *local,
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struct rxrpc_host_header *hdr,
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struct sk_buff *skb)
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{
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struct rxrpc_wire_header whdr;
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struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
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struct sockaddr_rxrpc srx;
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struct msghdr msg;
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struct kvec iov[2];
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size_t len;
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int ret;
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_enter("");
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if (rxrpc_extract_addr_from_skb(&srx, skb) < 0)
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return;
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msg.msg_name = &srx.transport;
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msg.msg_namelen = srx.transport_len;
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msg.msg_control = NULL;
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msg.msg_controllen = 0;
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msg.msg_flags = 0;
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whdr.epoch = htonl(sp->hdr.epoch);
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whdr.cid = htonl(sp->hdr.cid);
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whdr.callNumber = htonl(sp->hdr.callNumber);
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whdr.seq = 0;
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whdr.serial = 0;
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whdr.type = RXRPC_PACKET_TYPE_VERSION;
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whdr.flags = RXRPC_LAST_PACKET | (~hdr->flags & RXRPC_CLIENT_INITIATED);
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whdr.userStatus = 0;
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whdr.securityIndex = 0;
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whdr._rsvd = 0;
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whdr.serviceId = htons(sp->hdr.serviceId);
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iov[0].iov_base = &whdr;
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iov[0].iov_len = sizeof(whdr);
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iov[1].iov_base = (char *)rxrpc_version_string;
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iov[1].iov_len = sizeof(rxrpc_version_string);
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len = iov[0].iov_len + iov[1].iov_len;
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ret = kernel_sendmsg(local->socket, &msg, iov, 2, len);
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if (ret < 0)
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trace_rxrpc_tx_fail(local->debug_id, 0, ret,
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rxrpc_tx_point_version_reply);
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else
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trace_rxrpc_tx_packet(local->debug_id, &whdr,
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rxrpc_tx_point_version_reply);
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_leave("");
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}
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