162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0-or-later 262306a36Sopenharmony_ci/* Utility routines 362306a36Sopenharmony_ci * 462306a36Sopenharmony_ci * Copyright (C) 2015 Red Hat, Inc. All Rights Reserved. 562306a36Sopenharmony_ci * Written by David Howells (dhowells@redhat.com) 662306a36Sopenharmony_ci */ 762306a36Sopenharmony_ci 862306a36Sopenharmony_ci#include <linux/ip.h> 962306a36Sopenharmony_ci#include <linux/ipv6.h> 1062306a36Sopenharmony_ci#include <linux/udp.h> 1162306a36Sopenharmony_ci#include "ar-internal.h" 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_ci/* 1462306a36Sopenharmony_ci * Fill out a peer address from a socket buffer containing a packet. 1562306a36Sopenharmony_ci */ 1662306a36Sopenharmony_ciint rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *srx, struct sk_buff *skb) 1762306a36Sopenharmony_ci{ 1862306a36Sopenharmony_ci memset(srx, 0, sizeof(*srx)); 1962306a36Sopenharmony_ci 2062306a36Sopenharmony_ci switch (ntohs(skb->protocol)) { 2162306a36Sopenharmony_ci case ETH_P_IP: 2262306a36Sopenharmony_ci srx->transport_type = SOCK_DGRAM; 2362306a36Sopenharmony_ci srx->transport_len = sizeof(srx->transport.sin); 2462306a36Sopenharmony_ci srx->transport.sin.sin_family = AF_INET; 2562306a36Sopenharmony_ci srx->transport.sin.sin_port = udp_hdr(skb)->source; 2662306a36Sopenharmony_ci srx->transport.sin.sin_addr.s_addr = ip_hdr(skb)->saddr; 2762306a36Sopenharmony_ci return 0; 2862306a36Sopenharmony_ci 2962306a36Sopenharmony_ci#ifdef CONFIG_AF_RXRPC_IPV6 3062306a36Sopenharmony_ci case ETH_P_IPV6: 3162306a36Sopenharmony_ci srx->transport_type = SOCK_DGRAM; 3262306a36Sopenharmony_ci srx->transport_len = sizeof(srx->transport.sin6); 3362306a36Sopenharmony_ci srx->transport.sin6.sin6_family = AF_INET6; 3462306a36Sopenharmony_ci srx->transport.sin6.sin6_port = udp_hdr(skb)->source; 3562306a36Sopenharmony_ci srx->transport.sin6.sin6_addr = ipv6_hdr(skb)->saddr; 3662306a36Sopenharmony_ci return 0; 3762306a36Sopenharmony_ci#endif 3862306a36Sopenharmony_ci 3962306a36Sopenharmony_ci default: 4062306a36Sopenharmony_ci pr_warn_ratelimited("AF_RXRPC: Unknown eth protocol %u\n", 4162306a36Sopenharmony_ci ntohs(skb->protocol)); 4262306a36Sopenharmony_ci return -EAFNOSUPPORT; 4362306a36Sopenharmony_ci } 4462306a36Sopenharmony_ci} 45