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 | } |
45 |