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Date: Sun, 13 Jul 2014 19:49:48 -0700 (PDT)
From: Tom Herbert <therbert@...gle.com>
To: davem@...emloft.net, netdev@...r.kernel.org
Subject: [PATCH 3/4] l2tp: Call udp_sock_create
In l2tp driver call common function udp_sock_create to create the
listener UDP port.
Signed-off-by: Tom Herbert <therbert@...gle.com>
---
net/l2tp/Kconfig | 1 +
net/l2tp/l2tp_core.c | 86 +++++++++++++++++-----------------------------------
2 files changed, 28 insertions(+), 59 deletions(-)
diff --git a/net/l2tp/Kconfig b/net/l2tp/Kconfig
index adb9843..378c73b 100644
--- a/net/l2tp/Kconfig
+++ b/net/l2tp/Kconfig
@@ -6,6 +6,7 @@ menuconfig L2TP
tristate "Layer Two Tunneling Protocol (L2TP)"
depends on (IPV6 || IPV6=n)
depends on INET
+ select NET_UDP_TUNNEL
---help---
Layer Two Tunneling Protocol
diff --git a/net/l2tp/l2tp_core.c b/net/l2tp/l2tp_core.c
index bea2590..1109d3b 100644
--- a/net/l2tp/l2tp_core.c
+++ b/net/l2tp/l2tp_core.c
@@ -52,6 +52,7 @@
#include <net/dst.h>
#include <net/ip.h>
#include <net/udp.h>
+#include <net/udp_tunnel.h>
#include <net/inet_common.h>
#include <net/xfrm.h>
#include <net/protocol.h>
@@ -1358,81 +1359,46 @@ static int l2tp_tunnel_sock_create(struct net *net,
{
int err = -EINVAL;
struct socket *sock = NULL;
- struct sockaddr_in udp_addr = {0};
- struct sockaddr_l2tpip ip_addr = {0};
-#if IS_ENABLED(CONFIG_IPV6)
- struct sockaddr_in6 udp6_addr = {0};
- struct sockaddr_l2tpip6 ip6_addr = {0};
-#endif
+ struct udp_port_cfg udp_conf;
switch (cfg->encap) {
case L2TP_ENCAPTYPE_UDP:
+ memset(&udp_conf, 0, sizeof(udp_conf));
+
#if IS_ENABLED(CONFIG_IPV6)
if (cfg->local_ip6 && cfg->peer_ip6) {
- err = sock_create_kern(AF_INET6, SOCK_DGRAM, 0, &sock);
- if (err < 0)
- goto out;
-
- sk_change_net(sock->sk, net);
-
- udp6_addr.sin6_family = AF_INET6;
- memcpy(&udp6_addr.sin6_addr, cfg->local_ip6,
- sizeof(udp6_addr.sin6_addr));
- udp6_addr.sin6_port = htons(cfg->local_udp_port);
- err = kernel_bind(sock, (struct sockaddr *) &udp6_addr,
- sizeof(udp6_addr));
- if (err < 0)
- goto out;
-
- udp6_addr.sin6_family = AF_INET6;
- memcpy(&udp6_addr.sin6_addr, cfg->peer_ip6,
- sizeof(udp6_addr.sin6_addr));
- udp6_addr.sin6_port = htons(cfg->peer_udp_port);
- err = kernel_connect(sock,
- (struct sockaddr *) &udp6_addr,
- sizeof(udp6_addr), 0);
- if (err < 0)
- goto out;
-
- if (cfg->udp6_zero_tx_checksums)
- udp_set_no_check6_tx(sock->sk, true);
- if (cfg->udp6_zero_rx_checksums)
- udp_set_no_check6_rx(sock->sk, true);
+ udp_conf.family = AF_INET6;
+ memcpy(&udp_conf.local_ip6, cfg->local_ip6,
+ sizeof(udp_conf.local_ip6));
+ memcpy(&udp_conf.peer_ip6, cfg->peer_ip6,
+ sizeof(udp_conf.peer_ip6));
+ udp_conf.use_udp6_tx_checksums =
+ cfg->udp6_zero_tx_checksums;
+ udp_conf.use_udp6_rx_checksums =
+ cfg->udp6_zero_rx_checksums;
} else
#endif
{
- err = sock_create_kern(AF_INET, SOCK_DGRAM, 0, &sock);
- if (err < 0)
- goto out;
-
- sk_change_net(sock->sk, net);
-
- udp_addr.sin_family = AF_INET;
- udp_addr.sin_addr = cfg->local_ip;
- udp_addr.sin_port = htons(cfg->local_udp_port);
- err = kernel_bind(sock, (struct sockaddr *) &udp_addr,
- sizeof(udp_addr));
- if (err < 0)
- goto out;
-
- udp_addr.sin_family = AF_INET;
- udp_addr.sin_addr = cfg->peer_ip;
- udp_addr.sin_port = htons(cfg->peer_udp_port);
- err = kernel_connect(sock,
- (struct sockaddr *) &udp_addr,
- sizeof(udp_addr), 0);
- if (err < 0)
- goto out;
+ udp_conf.family = AF_INET;
+ udp_conf.local_ip = cfg->local_ip;
+ udp_conf.peer_ip = cfg->peer_ip;
+ udp_conf.use_udp_checksums = cfg->use_udp_checksums;
}
- if (!cfg->use_udp_checksums)
- sock->sk->sk_no_check_tx = 1;
+ udp_conf.local_udp_port = htons(cfg->local_udp_port);
+ udp_conf.peer_udp_port = htons(cfg->peer_udp_port);
+
+ err = udp_sock_create(net, &udp_conf, &sock);
+ if (err < 0)
+ goto out;
break;
case L2TP_ENCAPTYPE_IP:
#if IS_ENABLED(CONFIG_IPV6)
if (cfg->local_ip6 && cfg->peer_ip6) {
+ struct sockaddr_l2tpip6 ip6_addr = {0};
+
err = sock_create_kern(AF_INET6, SOCK_DGRAM,
IPPROTO_L2TP, &sock);
if (err < 0)
@@ -1461,6 +1427,8 @@ static int l2tp_tunnel_sock_create(struct net *net,
} else
#endif
{
+ struct sockaddr_l2tpip ip_addr = {0};
+
err = sock_create_kern(AF_INET, SOCK_DGRAM,
IPPROTO_L2TP, &sock);
if (err < 0)
--
2.0.0.526.g5318336
--
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