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