[ofa-general] [RMDA CM IPv6 support. PATCHv4 4/6] IPv6 local address resolution

[Aleksey Senin]

>From 8465a7d33a36cf8a9a92fbeea5d8f3b89f30e632 Mon Sep 17 00:00:00 2001
From: Aleksey Senin <alekseys at voltaire.com>
Date: Wed, 26 Nov 2008 16:16:09 +0200
Subject: [PATCH] IPv6 local address resolution

RDMA CM support on local machine

Signed-off-by: Aleksey Senin <alekseys at voltaire.com>
---
 drivers/infiniband/core/addr.c |   65 +++++++++++++++++++++++++++++-----------
 1 files changed, 47 insertions(+), 18 deletions(-)

diff --git a/drivers/infiniband/core/addr.c b/drivers/infiniband/core/addr.c
index f95d21f..1d785d7 100644
--- a/drivers/infiniband/core/addr.c
+++ b/drivers/infiniband/core/addr.c
@@ -279,29 +279,58 @@ static int addr_resolve_local(struct sockaddr *src_in,
 			      struct rdma_dev_addr *addr)
 {
 	struct net_device *dev;
-	__be32 src_ip = ((struct sockaddr_in *)src_in)->sin_addr.s_addr;
-	__be32 dst_ip = ((struct sockaddr_in *)dst_in)->sin_addr.s_addr;
-	int ret;
+	int ret = -EADDRNOTAVAIL;
 
-	dev = ip_dev_find(&init_net, dst_ip);
-	if (!dev)
-		return -EADDRNOTAVAIL;
+	if (dst_in->sa_family == AF_INET) {
+		__be32 src_ip = ((struct sockaddr_in *)src_in)->sin_addr.s_addr;
+		__be32 dst_ip = ((struct sockaddr_in *)dst_in)->sin_addr.s_addr;
 
-	if (ipv4_is_zeronet(src_ip)) {
-		src_in->sa_family = dst_in->sa_family;
-		((struct sockaddr_in *)src_in)->sin_addr.s_addr = dst_ip;
-		ret = rdma_copy_addr(addr, dev, dev->dev_addr);
-	} else if (ipv4_is_loopback(src_ip)) {
-		ret = rdma_translate_ip(dst_in, addr);
-		if (!ret)
-			memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN);
+		dev = ip_dev_find(&init_net, dst_ip);
+		if (!dev)
+			return -EADDRNOTAVAIL;
+
+		if (ipv4_is_zeronet(src_ip)) {
+			src_in->sa_family = dst_in->sa_family;
+			((struct sockaddr_in *)src_in)->sin_addr.s_addr = dst_ip;
+			ret = rdma_copy_addr(addr, dev, dev->dev_addr);
+		} else if (ipv4_is_loopback(src_ip)) {
+			ret = rdma_translate_ip(dst_in, addr);
+			if (!ret)
+				memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN);
+		} else {
+			ret = rdma_translate_ip(src_in, addr);
+			if (!ret)
+				memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN);
+		}
+		dev_put(dev);
 	} else {
-		ret = rdma_translate_ip(src_in, addr);
-		if (!ret)
-			memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN);
+		struct in6_addr *a = &((struct sockaddr_in6 *)dst_in)->sin6_addr;
+
+		for_each_netdev(&init_net, dev)
+			if (ipv6_chk_addr(&init_net, &((struct sockaddr_in6 *) addr)->sin6_addr, dev, 1))
+				break;
+
+		if (!dev)
+			return -EADDRNOTAVAIL;
+
+		a = &((struct sockaddr_in6 *)src_in)->sin6_addr;
+
+		if (ipv6_addr_any(a)) {
+			src_in->sa_family = dst_in->sa_family;
+			((struct sockaddr_in6 *)src_in)->sin6_addr =
+				((struct sockaddr_in6 *)dst_in)->sin6_addr;
+			ret = rdma_copy_addr(addr, dev, dev->dev_addr);
+		} else if (ipv6_addr_loopback(a)) {
+			ret = rdma_translate_ip(dst_in, addr);
+			if (!ret)
+				memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN);
+		} else  {
+			ret = rdma_translate_ip(src_in, addr);
+			if (!ret)
+				memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN);
+		}
 	}
 
-	dev_put(dev);
 	return ret;
 }
 
-- 
1.5.6.dirty