diff options
| author | Riccardo Paolo Bestetti <pbl@bestov.io> | 2021-11-17 12:00:11 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-11-18 07:21:52 +0300 |
| commit | 8ff978b8b222bc9d51dd109a46b51026336c95d8 (patch) | |
| tree | a8fa4fb92f7f213f821526d2c61c873b15172de3 /net/ipv4/ping.c | |
| parent | 75082e7f46809432131749f4ecea66864d0f7438 (diff) | |
| download | linux-8ff978b8b222bc9d51dd109a46b51026336c95d8.tar.xz | |
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/ipv4/ping.c')
| -rw-r--r-- | net/ipv4/ping.c | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c index 1e44a43acfe2..e540b0dcf085 100644 --- a/net/ipv4/ping.c +++ b/net/ipv4/ping.c @@ -311,15 +311,11 @@ static int ping_check_bind_addr(struct sock *sk, struct inet_sock *isk, pr_debug("ping_check_bind_addr(sk=%p,addr=%pI4,port=%d)\n", sk, &addr->sin_addr.s_addr, ntohs(addr->sin_port)); - if (addr->sin_addr.s_addr == htonl(INADDR_ANY)) - chk_addr_ret = RTN_LOCAL; - else - chk_addr_ret = inet_addr_type(net, addr->sin_addr.s_addr); - - if ((!inet_can_nonlocal_bind(net, isk) && - chk_addr_ret != RTN_LOCAL) || - chk_addr_ret == RTN_MULTICAST || - chk_addr_ret == RTN_BROADCAST) + chk_addr_ret = inet_addr_type(net, addr->sin_addr.s_addr); + + if (!inet_addr_valid_or_nonlocal(net, inet_sk(sk), + addr->sin_addr.s_addr, + chk_addr_ret)) return -EADDRNOTAVAIL; #if IS_ENABLED(CONFIG_IPV6) |