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7b674e390e
Fix IPv6 support in AF_RXRPC in the following ways:
(1) When extracting the address from a received IPv4 packet, if the local
transport socket is open for IPv6 then fill out the sockaddr_rxrpc
struct for an IPv4-mapped-to-IPv6 AF_INET6 transport address instead
of an AF_INET one.
(2) When sending CHALLENGE or RESPONSE packets, the transport length needs
to be set from the sockaddr_rxrpc::transport_len field rather than
sizeof() on the IPv4 transport address.
(3) When processing an IPv4 ICMP packet received by an IPv6 socket, set up
the address correctly before searching for the affected peer.
Signed-off-by: David Howells <dhowells@redhat.com>
116 lines
2.7 KiB
C
116 lines
2.7 KiB
C
/* 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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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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 const char rxrpc_version_string[65] = "linux-" UTS_RELEASE " AF_RXRPC";
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/*
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* Reply to a version request
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*/
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static 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(local, &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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_proto("Tx VERSION (reply)");
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ret = kernel_sendmsg(local->socket, &msg, iov, 2, len);
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if (ret < 0)
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_debug("sendmsg failed: %d", ret);
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_leave("");
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}
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/*
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* Process event packets targetted at a local endpoint.
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*/
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void rxrpc_process_local_events(struct rxrpc_local *local)
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{
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struct sk_buff *skb;
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char v;
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_enter("");
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skb = skb_dequeue(&local->event_queue);
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if (skb) {
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struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
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rxrpc_see_skb(skb, rxrpc_skb_rx_seen);
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_debug("{%d},{%u}", local->debug_id, sp->hdr.type);
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switch (sp->hdr.type) {
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case RXRPC_PACKET_TYPE_VERSION:
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if (skb_copy_bits(skb, sizeof(struct rxrpc_wire_header),
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&v, 1) < 0)
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return;
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_proto("Rx VERSION { %02x }", v);
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if (v == 0)
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rxrpc_send_version_request(local, &sp->hdr, skb);
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break;
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default:
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/* Just ignore anything we don't understand */
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break;
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}
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rxrpc_free_skb(skb, rxrpc_skb_rx_freed);
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}
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_leave("");
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}
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