Matthieu Baerts f44ce13201 mptcp: netlink: respect v4/v6-only sockets ... commit fb00ee4f33 upstream. If an MPTCP socket has been created with AF_INET6 and the IPV6_V6ONLY option has been set, the userspace PM would allow creating subflows using IPv4 addresses, e.g. mapped in v6. The kernel side of userspace PM will also accept creating subflows with local and remote addresses having different families. Depending on the subflow socket's family, different behaviours are expected: - If AF_INET is forced with a v6 address, the kernel will take the last byte of the IP and try to connect to that: a new subflow is created but to a non expected address. - If AF_INET6 is forced with a v4 address, the kernel will try to connect to a v4 address (v4-mapped-v6). A -EBADF error from the connect() part is then expected. It is then required to check the given families can be accepted. This is done by using a new helper for addresses family matching, taking care of IPv4 vs IPv4-mapped-IPv6 addresses. This helper will be re-used later by the in-kernel path-manager to use mixed IPv4 and IPv6 addresses. While at it, a clear error message is now reported if there are some conflicts with the families that have been passed by the userspace. Fixes: 702c2f646d ("mptcp: netlink: allow userspace-driven subflow establishment") Cc: stable@vger.kernel.org Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-01-24 07:24:37 +01:00
..
bpf.c	bpf: Add bpf_skc_to_mptcp_sock_proto	2022-05-20 15:29:00 -07:00
crypto.c
crypto_test.c
ctrl.c	mptcp: Add a per-namespace sysctl to set the default path manager type	2022-04-29 17:25:14 -07:00
diag.c
Kconfig
Makefile	Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2022-05-23 16:07:14 -07:00
mib.c	mptcp: add more offered MIBs counter	2022-05-05 19:00:16 -07:00
mib.h	mptcp: add more offered MIBs counter	2022-05-05 19:00:16 -07:00
mptcp_diag.c	tcp: Access &tcp_hashinfo via net.	2022-09-20 10:21:49 -07:00
options.c	tcp: Fix data-races around sysctl_tcp_workaround_signed_windows.	2022-07-22 12:06:17 +01:00
pm.c	mptcp: netlink: respect v4/v6-only sockets	2023-01-24 07:24:37 +01:00
pm_netlink.c	mptcp: account memory allocation in mptcp_nl_cmd_add_addr() to user	2022-09-15 12:01:02 +02:00
pm_userspace.c	mptcp: netlink: respect v4/v6-only sockets	2023-01-24 07:24:37 +01:00
protocol.c	mptcp: explicitly specify sock family at subflow creation time	2023-01-24 07:24:37 +01:00
protocol.h	mptcp: netlink: respect v4/v6-only sockets	2023-01-24 07:24:37 +01:00
sockopt.c	mptcp: add TCP_FASTOPEN_CONNECT socket option	2022-09-28 18:52:03 -07:00
subflow.c	mptcp: explicitly specify sock family at subflow creation time	2023-01-24 07:24:37 +01:00
syncookies.c
token.c
token_test.c