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1 | /* Utility routines |
2 | * | |
3 | * Copyright (C) 2015 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public Licence | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the Licence, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #include <linux/ip.h> | |
d991b4a3 | 13 | #include <linux/ipv6.h> |
be6e6707 DH |
14 | #include <linux/udp.h> |
15 | #include "ar-internal.h" | |
16 | ||
d991b4a3 DH |
17 | /* |
18 | * Fill out a peer address from a socket buffer containing a packet. | |
19 | */ | |
20 | int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *srx, struct sk_buff *skb) | |
21 | { | |
22 | memset(srx, 0, sizeof(*srx)); | |
23 | ||
24 | switch (ntohs(skb->protocol)) { | |
25 | case ETH_P_IP: | |
26 | srx->transport_type = SOCK_DGRAM; | |
27 | srx->transport_len = sizeof(srx->transport.sin); | |
28 | srx->transport.sin.sin_family = AF_INET; | |
29 | srx->transport.sin.sin_port = udp_hdr(skb)->source; | |
30 | srx->transport.sin.sin_addr.s_addr = ip_hdr(skb)->saddr; | |
31 | return 0; | |
32 | ||
d1912747 | 33 | #ifdef CONFIG_AF_RXRPC_IPV6 |
d991b4a3 DH |
34 | case ETH_P_IPV6: |
35 | srx->transport_type = SOCK_DGRAM; | |
36 | srx->transport_len = sizeof(srx->transport.sin6); | |
37 | srx->transport.sin6.sin6_family = AF_INET6; | |
38 | srx->transport.sin6.sin6_port = udp_hdr(skb)->source; | |
39 | srx->transport.sin6.sin6_addr = ipv6_hdr(skb)->saddr; | |
40 | return 0; | |
d1912747 | 41 | #endif |
d991b4a3 DH |
42 | |
43 | default: | |
44 | pr_warn_ratelimited("AF_RXRPC: Unknown eth protocol %u\n", | |
45 | ntohs(skb->protocol)); | |
46 | return -EAFNOSUPPORT; | |
47 | } | |
48 | } |