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pptp: support sockets bound to an interface

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use sk_bound_dev_if for route lookup as already done
in most of the other ip_route_output_ports() calls.

Since most PPPoA providers use 10.0.0.138 as default gateway IP
this will allow connections to multiple PPTP providers with the
same IP address over different interfaces.

Signed-off-by: Ulrich Weber <ulrich.weber@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ulrich Weber 2020-01-14 15:19:43 +01:00 committed by David S. Miller
parent 8fec380ac0
commit 43d28c612f
1 changed files with 3 additions and 2 deletions
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5
drivers/net/ppp/pptp.c
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@ -155,7 +155,7 @@ static int pptp_xmit(struct ppp_channel *chan, struct sk_buff *skb)
opt->dst_addr.sin_addr.s_addr,
opt->src_addr.sin_addr.s_addr,
0, 0, IPPROTO_GRE,
RT_TOS(0), 0);
RT_TOS(0), sk->sk_bound_dev_if);
if (IS_ERR(rt))
goto tx_error;
@ -444,7 +444,8 @@ static int pptp_connect(struct socket *sock, struct sockaddr *uservaddr,
opt->dst_addr.sin_addr.s_addr,
opt->src_addr.sin_addr.s_addr,
0, 0,
IPPROTO_GRE, RT_CONN_FLAGS(sk), 0);
IPPROTO_GRE, RT_CONN_FLAGS(sk),
sk->sk_bound_dev_if);
if (IS_ERR(rt)) {
error = -EHOSTUNREACH;
goto end;