[linux-2.6-block.git] / net / rxrpc / utils.c

/* Utility routines
 *
 * Copyright (C) 2015 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public Licence
 * as published by the Free Software Foundation; either version
 * 2 of the Licence, or (at your option) any later version.
 */

#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/udp.h>
#include "ar-internal.h"

/*
 * Fill out a peer address from a socket buffer containing a packet.
 */
int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *srx, struct sk_buff *skb)
{
	memset(srx, 0, sizeof(*srx));

	switch (ntohs(skb->protocol)) {
	case ETH_P_IP:
		srx->transport_type = SOCK_DGRAM;
		srx->transport_len = sizeof(srx->transport.sin);
		srx->transport.sin.sin_family = AF_INET;
		srx->transport.sin.sin_port = udp_hdr(skb)->source;
		srx->transport.sin.sin_addr.s_addr = ip_hdr(skb)->saddr;
		return 0;

#ifdef CONFIG_AF_RXRPC_IPV6
	case ETH_P_IPV6:
		srx->transport_type = SOCK_DGRAM;
		srx->transport_len = sizeof(srx->transport.sin6);
		srx->transport.sin6.sin6_family = AF_INET6;
		srx->transport.sin6.sin6_port = udp_hdr(skb)->source;
		srx->transport.sin6.sin6_addr = ipv6_hdr(skb)->saddr;
		return 0;
#endif

	default:
		pr_warn_ratelimited("AF_RXRPC: Unknown eth protocol %u\n",
				    ntohs(skb->protocol));
		return -EAFNOSUPPORT;
	}
}
Commit	Line	Data
be6e6707 DH	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	*/
5a790b73	20	int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc srx, struct sk_buff skb)
d991b4a3 DH	21	{
	22	memset(srx, 0, sizeof(*srx));
	23
	24	switch (ntohs(skb->protocol)) {
	25	case ETH_P_IP:
46894a13 DH	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;
d991b4a3 DH	31	return 0;
d991b4a3 DH	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	}