netdev - [PATCH] net/ipv4: add comment about connect() to INADDR

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Message-ID: <159569777048.30163.2041497275480123382.stgit@zurg>
Date:   Sat, 25 Jul 2020 20:22:50 +0300
From:   Konstantin Khlebnikov <koct9i@...il.com>
To:     netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH] net/ipv4: add comment about connect() to INADDR_ANY

Copy comment from net/ipv6/tcp_ipv6.c to help future readers.

Signed-off-by: Konstantin Khlebnikov <koct9i@...il.com>
---
 net/ipv4/route.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index a01efa062f6b..303fe706cbd2 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2591,6 +2591,7 @@ struct rtable *ip_route_output_key_hash_rcu(struct net *net, struct flowi4 *fl4,
 		}
 	}

+	/* connect() to INADDR_ANY means loopback (BSD'ism). */
 	if (!fl4->daddr) {
 		fl4->daddr = fl4->saddr;
 		if (!fl4->daddr)