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// SPDX-License-Identifier: GPL-2.0-or-later
/* Utility routines
*
* Copyright (C) 2015 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*/
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/udp.h>
#include "ar-internal.h"
/*
* Fill out a peer address from a socket buffer containing a packet.
*/
int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *srx, struct sk_buff *skb)
{
memset(srx, 0, sizeof(*srx));
switch (ntohs(skb->protocol)) {
case ETH_P_IP:
srx->transport_type = SOCK_DGRAM;
srx->transport_len = sizeof(srx->transport.sin);
srx->transport.sin.sin_family = AF_INET;
srx->transport.sin.sin_port = udp_hdr(skb)->source;
srx->transport.sin.sin_addr.s_addr = ip_hdr(skb)->saddr;
return 0;
#ifdef CONFIG_AF_RXRPC_IPV6
case ETH_P_IPV6:
srx->transport_type = SOCK_DGRAM;
srx->transport_len = sizeof(srx->transport.sin6);
srx->transport.sin6.sin6_family = AF_INET6;
srx->transport.sin6.sin6_port = udp_hdr(skb)->source;
srx->transport.sin6.sin6_addr = ipv6_hdr(skb)->saddr;
return 0;
#endif
default:
pr_warn_ratelimited("AF_RXRPC: Unknown eth protocol %u\n",
ntohs(skb->protocol));
return -EAFNOSUPPORT;
}
}
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