diff mbox series

[mptcp-next,v13,31/32] mptcp: map v4 address to v6 when destroying subflow

Message ID 48657f917c3cc536ff123b673b0de5b3330fe8d3.1701180969.git.geliang.tang@suse.com (mailing list archive)
State Superseded, archived
Headers show
Series userspace pm enhancements | expand

Checks

Context Check Description
matttbe/checkpatch success total: 0 errors, 0 warnings, 0 checks, 16 lines checked
matttbe/build success Build and static analysis OK
matttbe/KVM_Validation__normal__except_selftest_mptcp_join_ success Success! ✅
matttbe/KVM_Validation__debug__only_selftest_mptcp_join_ success Success! ✅
matttbe/KVM_Validation__normal__only_selftest_mptcp_join_ success Success! ✅
matttbe/KVM_Validation__debug__except_selftest_mptcp_join_ success Success! ✅

Commit Message

Geliang Tang Nov. 28, 2023, 2:22 p.m. UTC 
In mptcp_pm_nl_subflow_destroy_doit(), before checking local address
family with remote address family, map an IPv4 address to an IPv6 address
if the pair is a v4-mapped address.

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
---
 net/mptcp/pm_userspace.c | 10 ++++++++++
 1 file changed, 10 insertions(+)
diff mbox series

Patch

diff --git a/net/mptcp/pm_userspace.c b/net/mptcp/pm_userspace.c
index 43a1217503ea..a28197a4d0b6 100644
--- a/net/mptcp/pm_userspace.c
+++ b/net/mptcp/pm_userspace.c
@@ -524,6 +524,16 @@  int mptcp_pm_nl_subflow_destroy_doit(struct sk_buff *skb, struct genl_info *info
 		goto destroy_err;
 	}
 
+#if IS_ENABLED(CONFIG_MPTCP_IPV6)
+	if (addr_l.family == AF_INET && ipv6_addr_v4mapped(&addr_r.addr6)) {
+		ipv6_addr_set_v4mapped(addr_l.addr.s_addr, &addr_l.addr6);
+		addr_l.family = AF_INET6;
+	}
+	if (addr_r.family == AF_INET && ipv6_addr_v4mapped(&addr_l.addr6)) {
+		ipv6_addr_set_v4mapped(addr_r.addr.s_addr, &addr_r.addr6);
+		addr_r.family = AF_INET6;
+	}
+#endif
 	if (addr_l.family != addr_r.family) {
 		GENL_SET_ERR_MSG(info, "address families do not match");
 		err = -EINVAL;