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net: Set ping saddr after we successfully get the ping port

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We can defer set ping saddr until we successfully get the ping port. So we
can avoid clear saddr when failed. Since ping_clear_saddr() is not used
anymore now, remove it.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Miaohe Lin 2020-08-25 07:33:22 -04:00 committed by David S. Miller
parent cca852831c
commit 0316a21116
1 changed files with 3 additions and 16 deletions
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19
net/ipv4/ping.c
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@ -383,20 +383,6 @@ static void ping_set_saddr(struct sock *sk, struct sockaddr *saddr)
}
}
static void ping_clear_saddr(struct sock *sk, int dif)
{
sk->sk_bound_dev_if = dif;
if (sk->sk_family == AF_INET) {
struct inet_sock *isk = inet_sk(sk);
isk->inet_rcv_saddr = isk->inet_saddr = 0;
#if IS_ENABLED(CONFIG_IPV6)
} else if (sk->sk_family == AF_INET6) {
struct ipv6_pinfo *np = inet6_sk(sk);
memset(&sk->sk_v6_rcv_saddr, 0, sizeof(sk->sk_v6_rcv_saddr));
memset(&np->saddr, 0, sizeof(np->saddr));
#endif
}
}
/*
* We need our own bind because there are no privileged id's == local ports.
* Moreover, we don't allow binding to multi- and broadcast addresses.
@ -420,12 +406,13 @@ int ping_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
goto out;
err = -EADDRINUSE;
ping_set_saddr(sk, uaddr);
snum = ntohs(((struct sockaddr_in *)uaddr)->sin_port);
if (ping_get_port(sk, snum) != 0) {
ping_clear_saddr(sk, dif);
/* Restore possibly modified sk->sk_bound_dev_if by ping_check_bind_addr(). */
sk->sk_bound_dev_if = dif;
goto out;
}
ping_set_saddr(sk, uaddr);
pr_debug("after bind(): num = %hu, dif = %d\n",
isk->inet_num,