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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@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert 2014-07-13 19:49:48 -07:00 committed by David S. Miller
parent 3ee64f39be
commit 85644b4d0c
2 changed files with 28 additions and 59 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
net/l2tp/Kconfig
View File

@ -6,6 +6,7 @@ menuconfig L2TP
tristate "Layer Two Tunneling Protocol (L2TP)" tristate "Layer Two Tunneling Protocol (L2TP)"
depends on (IPV6 || IPV6=n) depends on (IPV6 || IPV6=n)
depends on INET depends on INET
select NET_UDP_TUNNEL
---help--- ---help---
Layer Two Tunneling Protocol Layer Two Tunneling Protocol

86
net/l2tp/l2tp_core.c
View File

@ -52,6 +52,7 @@
#include <net/dst.h> #include <net/dst.h>
#include <net/ip.h> #include <net/ip.h>
#include <net/udp.h> #include <net/udp.h>
#include <net/udp_tunnel.h>
#include <net/inet_common.h> #include <net/inet_common.h>
#include <net/xfrm.h> #include <net/xfrm.h>
#include <net/protocol.h> #include <net/protocol.h>
@ -1358,81 +1359,46 @@ static int l2tp_tunnel_sock_create(struct net *net,
{ {
int err = -EINVAL; int err = -EINVAL;
struct socket *sock = NULL; struct socket *sock = NULL;
struct sockaddr_in udp_addr = {0}; struct udp_port_cfg udp_conf;
struct sockaddr_l2tpip ip_addr = {0};
#if IS_ENABLED(CONFIG_IPV6)
struct sockaddr_in6 udp6_addr = {0};
struct sockaddr_l2tpip6 ip6_addr = {0};
#endif
switch (cfg->encap) { switch (cfg->encap) {
case L2TP_ENCAPTYPE_UDP: case L2TP_ENCAPTYPE_UDP:
memset(&udp_conf, 0, sizeof(udp_conf));
#if IS_ENABLED(CONFIG_IPV6) #if IS_ENABLED(CONFIG_IPV6)
if (cfg->local_ip6 && cfg->peer_ip6) { if (cfg->local_ip6 && cfg->peer_ip6) {
err = sock_create_kern(AF_INET6, SOCK_DGRAM, 0, &sock); udp_conf.family = AF_INET6;
if (err < 0) memcpy(&udp_conf.local_ip6, cfg->local_ip6,
goto out; sizeof(udp_conf.local_ip6));
memcpy(&udp_conf.peer_ip6, cfg->peer_ip6,
sk_change_net(sock->sk, net); sizeof(udp_conf.peer_ip6));
udp_conf.use_udp6_tx_checksums =
udp6_addr.sin6_family = AF_INET6; cfg->udp6_zero_tx_checksums;
memcpy(&udp6_addr.sin6_addr, cfg->local_ip6, udp_conf.use_udp6_rx_checksums =
sizeof(udp6_addr.sin6_addr)); cfg->udp6_zero_rx_checksums;
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);
} else } else
#endif #endif
{ {
err = sock_create_kern(AF_INET, SOCK_DGRAM, 0, &sock); udp_conf.family = AF_INET;
if (err < 0) udp_conf.local_ip = cfg->local_ip;
goto out; udp_conf.peer_ip = cfg->peer_ip;
udp_conf.use_udp_checksums = cfg->use_udp_checksums;
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;
} }
if (!cfg->use_udp_checksums) udp_conf.local_udp_port = htons(cfg->local_udp_port);
sock->sk->sk_no_check_tx = 1; udp_conf.peer_udp_port = htons(cfg->peer_udp_port);
err = udp_sock_create(net, &udp_conf, &sock);
if (err < 0)
goto out;
break; break;
case L2TP_ENCAPTYPE_IP: case L2TP_ENCAPTYPE_IP:
#if IS_ENABLED(CONFIG_IPV6) #if IS_ENABLED(CONFIG_IPV6)
if (cfg->local_ip6 && cfg->peer_ip6) { if (cfg->local_ip6 && cfg->peer_ip6) {
struct sockaddr_l2tpip6 ip6_addr = {0};
err = sock_create_kern(AF_INET6, SOCK_DGRAM, err = sock_create_kern(AF_INET6, SOCK_DGRAM,
IPPROTO_L2TP, &sock); IPPROTO_L2TP, &sock);
if (err < 0) if (err < 0)
@ -1461,6 +1427,8 @@ static int l2tp_tunnel_sock_create(struct net *net,
} else } else
#endif #endif
{ {
struct sockaddr_l2tpip ip_addr = {0};
err = sock_create_kern(AF_INET, SOCK_DGRAM, err = sock_create_kern(AF_INET, SOCK_DGRAM,
IPPROTO_L2TP, &sock); IPPROTO_L2TP, &sock);
if (err < 0) if (err < 0)