Merge tag 'locking-urgent-2021-05-23' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6-microblaze.git] / net / rxrpc / utils.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* Utility routines
3  *
4  * Copyright (C) 2015 Red Hat, Inc. All Rights Reserved.
5  * Written by David Howells (dhowells@redhat.com)
6  */
7
8 #include <linux/ip.h>
9 #include <linux/ipv6.h>
10 #include <linux/udp.h>
11 #include "ar-internal.h"
12
13 /*
14  * Fill out a peer address from a socket buffer containing a packet.
15  */
16 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *srx, struct sk_buff *skb)
17 {
18         memset(srx, 0, sizeof(*srx));
19
20         switch (ntohs(skb->protocol)) {
21         case ETH_P_IP:
22                 srx->transport_type = SOCK_DGRAM;
23                 srx->transport_len = sizeof(srx->transport.sin);
24                 srx->transport.sin.sin_family = AF_INET;
25                 srx->transport.sin.sin_port = udp_hdr(skb)->source;
26                 srx->transport.sin.sin_addr.s_addr = ip_hdr(skb)->saddr;
27                 return 0;
28
29 #ifdef CONFIG_AF_RXRPC_IPV6
30         case ETH_P_IPV6:
31                 srx->transport_type = SOCK_DGRAM;
32                 srx->transport_len = sizeof(srx->transport.sin6);
33                 srx->transport.sin6.sin6_family = AF_INET6;
34                 srx->transport.sin6.sin6_port = udp_hdr(skb)->source;
35                 srx->transport.sin6.sin6_addr = ipv6_hdr(skb)->saddr;
36                 return 0;
37 #endif
38
39         default:
40                 pr_warn_ratelimited("AF_RXRPC: Unknown eth protocol %u\n",
41                                     ntohs(skb->protocol));
42                 return -EAFNOSUPPORT;
43         }
44 }