File 0013-socket-activation-Fix-rpcbind.service-to-use-separat.patch of Package rpcbind

From 487918f173a899ce39b426ceeaa830d3c45fbd2d Mon Sep 17 00:00:00 2001
From: Jeff Mahoney <jeffm@suse.com>
Date: Tue, 20 Aug 2013 15:20:13 +0200
Subject: [PATCH 13/24] socket-activation: Fix rpcbind.service to use separate
 sockets

 systemd will, by default, pass a socket that provides both IPv4 and
 IPv6 services. RPC netconfig requires that sockets be either IPv4
 or IPv6.

 This patch fixes the rpcbind.socket unit file and adds a warning
 to rpcbind should the user encounter an issue.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
---
 src/rpcbind.c          | 29 +++++++++++++++++++++++++++++
 systemd/rpcbind.socket | 11 ++++++++---
 2 files changed, 37 insertions(+), 3 deletions(-)

diff --git a/src/rpcbind.c b/src/rpcbind.c
index baf1ac0..aec0510 100644
--- a/src/rpcbind.c
+++ b/src/rpcbind.c
@@ -50,6 +50,7 @@
 #include <sys/file.h>
 #include <sys/socket.h>
 #include <sys/un.h>
+#include <netinet/in.h>
 #include <rpc/rpc.h>
 #include <rpc/rpc_com.h>
 #ifdef PORTMAP
@@ -561,6 +562,31 @@ rpcbind_register_transport(struct netconfig *nconf, SVCXPRT *xprt, struct netbuf
 }
 
 /*
+ * Normally systemd will open sockets in dual ipv4/ipv6 mode.
+ * That won't work with netconfig and we'll only match
+ * the ipv6 socket. Convert it to IPV6_V6ONLY and issue
+ * a warning for the user to fix their systemd config.
+ */
+static int
+handle_ipv6_socket(int fd)
+{
+	int opt;
+	socklen_t len = sizeof(opt);
+
+	if (getsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &opt, &len)) {
+		syslog(LOG_ERR, "failed to get ipv6 socket opts: %m");
+		return -1;
+	}
+
+	if (opt) /* socket is already in V6ONLY mode */
+		return 0;
+
+	syslog(LOG_ERR, "systemd has passed an IPv4/IPv6 dual-mode socket.");
+	syslog(LOG_ERR, "Please fix your systemd config by specifying IPv4 and IPv6 sockets separately and using BindIPv6Only=ipv6-only.");
+	return -1;
+}
+
+/*
  * This will create a server socket for the given netid, bound to the
  * address specified by @hostname
  *
@@ -591,6 +617,9 @@ rpcbind_init_endpoint(struct netconfig *nconf, const char *hostname, int fd)
 			exit(1);
 		}
 
+		if (addr.ss_family == AF_INET6 && handle_ipv6_socket(fd))
+			return -1;
+
 		sockaddr2netbuf((struct sockaddr *) &addr, alen, &taddr.addr);
 	}
 
diff --git a/systemd/rpcbind.socket b/systemd/rpcbind.socket
index ad5fd62..0b0c1d3 100644
--- a/systemd/rpcbind.socket
+++ b/systemd/rpcbind.socket
@@ -4,9 +4,14 @@ Wants=rpcbind.target
 Before=rpcbind.target
 
 [Socket]
-ListenStream=/var/run/rpcbind.sock
-ListenStream=111
-ListenDatagram=111
+ListenStream=/run/rpcbind.sock
+
+# RPC netconfig can't handle ipv6/ipv4 dual sockets
+BindIPv6Only=ipv6-only
+ListenStream=0.0.0.0:111
+ListenDatagram=0.0.0.0:111
+ListenStream=[::]:111
+ListenDatagram=[::]:111
 
 [Install]
 WantedBy=sockets.target
-- 
1.7.12.4