diff options
| author | Riccardo Paolo Bestetti <pbl@bestov.io> | 2021-11-17 10:00:11 +0100 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-11-17 20:21:52 -0800 |
| commit | 8ff978b8b222bc9d51dd109a46b51026336c95d8 (patch) | |
| tree | a8fa4fb92f7f213f821526d2c61c873b15172de3 /net/ipv6/af_inet6.c | |
| parent | 75082e7f46809432131749f4ecea66864d0f7438 (diff) | |
| download | lwn-8ff978b8b222bc9d51dd109a46b51026336c95d8.tar.gz lwn-8ff978b8b222bc9d51dd109a46b51026336c95d8.zip | |
ipv4/raw: support binding to nonlocal addresses
Add support to inet v4 raw sockets for binding to nonlocal addresses
through the IP_FREEBIND and IP_TRANSPARENT socket options, as well as
the ipv4.ip_nonlocal_bind kernel parameter.
Add helper function to inet_sock.h to check for bind address validity on
the base of the address type and whether nonlocal address are enabled
for the socket via any of the sockopts/sysctl, deduplicating checks in
ipv4/ping.c, ipv4/af_inet.c, ipv6/af_inet6.c (for mapped v4->v6
addresses), and ipv4/raw.c.
Add test cases with IP[V6]_FREEBIND verifying that both v4 and v6 raw
sockets support binding to nonlocal addresses after the change. Add
necessary support for the test cases to nettest.
Signed-off-by: Riccardo Paolo Bestetti <pbl@bestov.io>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20211117090010.125393-1-pbl@bestov.io
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv6/af_inet6.c')
| -rw-r--r-- | net/ipv6/af_inet6.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index 0c4da163535a..1f28c9820c2e 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -337,11 +337,8 @@ static int __inet6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len, chk_addr_ret = inet_addr_type_dev_table(net, dev, v4addr); rcu_read_unlock(); - if (!inet_can_nonlocal_bind(net, inet) && - v4addr != htonl(INADDR_ANY) && - chk_addr_ret != RTN_LOCAL && - chk_addr_ret != RTN_MULTICAST && - chk_addr_ret != RTN_BROADCAST) { + if (!inet_addr_valid_or_nonlocal(net, inet, v4addr, + chk_addr_ret)) { err = -EADDRNOTAVAIL; goto out; } |