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inet: Add getsockopt support for IP_ROUTER_ALERT and IPV6_ROUTER_ALERT

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Currently getsockopt does not support IP_ROUTER_ALERT and
IPV6_ROUTER_ALERT, and we are unable to get the values of these two
socket options through getsockopt.

This patch adds getsockopt support for IP_ROUTER_ALERT and
IPV6_ROUTER_ALERT.

Signed-off-by: Juntong Deng <juntong.deng@outlook.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Juntong Deng 2024-03-04 11:32:08 +00:00 committed by David S. Miller
parent edf7468d9a
commit eeb78df406
3 changed files with 17 additions and 3 deletions
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1
include/net/inet_sock.h
View File

@ -274,6 +274,7 @@ enum {
INET_FLAGS_REPFLOW = 27,
INET_FLAGS_RTALERT_ISOLATE = 28,
INET_FLAGS_SNDFLOW = 29,
INET_FLAGS_RTALERT = 30,
};
/* cmsg flags for inet */

13
net/ipv4/ip_sockglue.c
View File

@ -894,7 +894,7 @@ int do_ip_setsockopt(struct sock *sk, int level, int optname,
{
struct inet_sock *inet = inet_sk(sk);
struct net *net = sock_net(sk);
int val = 0, err;
int val = 0, err, retv;
bool needs_rtnl = setsockopt_needs_rtnl(optname);
switch (optname) {
@ -938,8 +938,12 @@ int do_ip_setsockopt(struct sock *sk, int level, int optname,
/* If optlen==0, it is equivalent to val == 0 */
if (optname == IP_ROUTER_ALERT)
return ip_ra_control(sk, val ? 1 : 0, NULL);
if (optname == IP_ROUTER_ALERT) {
retv = ip_ra_control(sk, val ? 1 : 0, NULL);
if (retv == 0)
inet_assign_bit(RTALERT, sk, val);
return retv;
}
if (ip_mroute_opt(optname))
return ip_mroute_setsockopt(sk, optname, optval, optlen);
@ -1575,6 +1579,9 @@ int do_ip_getsockopt(struct sock *sk, int level, int optname,
case IP_BIND_ADDRESS_NO_PORT:
val = inet_test_bit(BIND_ADDRESS_NO_PORT, sk);
goto copyval;
case IP_ROUTER_ALERT:
val = inet_test_bit(RTALERT, sk);
goto copyval;
case IP_TTL:
val = READ_ONCE(inet->uc_ttl);
if (val < 0)

6
net/ipv6/ipv6_sockglue.c
View File

@ -948,6 +948,8 @@ done:
if (optlen < sizeof(int))
goto e_inval;
retv = ip6_ra_control(sk, val);
if (retv == 0)
inet6_assign_bit(RTALERT, sk, valbool);
break;
case IPV6_FLOWLABEL_MGR:
retv = ipv6_flowlabel_opt(sk, optval, optlen);
@ -1445,6 +1447,10 @@ int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
val = np->rxopt.bits.recvfragsize;
break;
case IPV6_ROUTER_ALERT:
val = inet6_test_bit(RTALERT, sk);
break;
case IPV6_ROUTER_ALERT_ISOLATE:
val = inet6_test_bit(RTALERT_ISOLATE, sk);
break;