netdev - [PATCH 1/3] ieee802154/dgram: Pass source address in dgram

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Date:	Tue, 26 Mar 2013 22:41:29 +0000
From:	Stefan Schmidt <stefan@...enfreihafen.org>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org, linux-zigbee-devel@...ts.sourceforge.net,
	alan@...nal11.us,
	Stephen Röttger 
	<stephen.roettger@...o-entropy.de>,
	Stefan Schmidt <stefan@...enfreihafen.org>
Subject: [PATCH 1/3] ieee802154/dgram: Pass source address in dgram_recvmsg

From: Stephen Röttger <stephen.roettger@...o-entropy.de>

This patch lets dgram_recvmsg fill in the sockaddr struct in
msg->msg_name with the source address of the packet.
This is used by the userland functions recvmsg and recvfrom to get the
senders address.

[Stefan: Changed from old zigbee legacy tree to mainline]

Signed-off-by: Stephen Röttger <stephen.roettger@...o-entropy.de>
Signed-off-by: Stefan Schmidt <stefan@...enfreihafen.org>
---
 net/ieee802154/dgram.c |   10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/net/ieee802154/dgram.c b/net/ieee802154/dgram.c
index e0da175..581a595 100644
--- a/net/ieee802154/dgram.c
+++ b/net/ieee802154/dgram.c
@@ -291,6 +291,9 @@ static int dgram_recvmsg(struct kiocb *iocb, struct sock *sk,
 	size_t copied = 0;
 	int err = -EOPNOTSUPP;
 	struct sk_buff *skb;
+	struct sockaddr_ieee802154 *saddr;
+
+	saddr = (struct sockaddr_ieee802154 *)msg->msg_name;
 
 	skb = skb_recv_datagram(sk, flags, noblock, &err);
 	if (!skb)
@@ -309,6 +312,13 @@ static int dgram_recvmsg(struct kiocb *iocb, struct sock *sk,
 
 	sock_recv_ts_and_drops(msg, sk, skb);
 
+	if (saddr) {
+		saddr->family = AF_IEEE802154;
+		saddr->addr = mac_cb(skb)->sa;
+	}
+	if (addr_len)
+		*addr_len = sizeof(*saddr);
+
 	if (flags & MSG_TRUNC)
 		copied = skb->len;
 done:
-- 
1.7.10.4

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