From: Stacey Son <sson@FreeBSD.org>

Add special handler for IPv6 interface request ioctls that take
a sockaddr_in6 structure as input and return an integer flag value,
such as SIOCGIFAFLAG_IN6 and SIOCGIFALIFETIME_IN6.

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>
Signed-off-by: Warner Losh <imp@bsdimp.com>
---
 bsd-user/bsd-ioctl.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/bsd-user/bsd-ioctl.c b/bsd-user/bsd-ioctl.c
index d2eb9105fc..8d25d84dbe 100644
--- a/bsd-user/bsd-ioctl.c
+++ b/bsd-user/bsd-ioctl.c
@@ -260,3 +260,35 @@ static void target_to_host_sockaddr_in6(struct sockaddr_in6 *hsa_in6,
     memcpy(&hsa_in6->sin6_addr, &tsa_in6->sin6_addr, 16);
     __get_user(hsa_in6->sin6_scope_id, &tsa_in6->sin6_scope_id);
 }
+
+/*
+ * For ioctl()'s such as SIOCGIFAFLAG_IN6 and SIOCGIFALIFETIME_IN6 that
+ * passes a struct sockaddr_in6 in and gets an int out using
+ * struct in6_ifreq.
+ */
+static abi_long do_ioctl_in6_ifreq_sockaddr_int(const IOCTLEntry *ie,
+        uint8_t *buf_temp, int fd, abi_long cmd, abi_long arg)
+{
+    abi_long ret;
+    struct target_in6_ifreq *tin6ifreq;
+    struct target_sockaddr_in6 *tsa_in6;
+    struct in6_ifreq hin6ifreq;
+    struct sockaddr_in6 *hsa_in6 = &hin6ifreq.ifr_ifru.ifru_addr;
+
+    tin6ifreq = lock_user(VERIFY_WRITE, arg, sizeof(*tin6ifreq), 1);
+    if (tin6ifreq == NULL) {
+        return -TARGET_EFAULT;
+    }
+    memcpy(hin6ifreq.ifr_name, tin6ifreq->ifr_name, IFNAMSIZ);
+    tsa_in6 = &tin6ifreq->ifr_ifru.ifru_addr;
+    target_to_host_sockaddr_in6(hsa_in6, tsa_in6);
+
+    ret = get_errno(safe_ioctl(fd, ie->host_cmd, &hin6ifreq));
+    if (!is_error(ret)) {
+        put_user_s32(hin6ifreq.ifr_ifru.ifru_flags6,
+                arg + offsetof(struct target_in6_ifreq, ifr_ifru.ifru_flags6));
+    }
+    unlock_user(tin6ifreq, arg, sizeof(*tin6ifreq));
+
+    return ret;
+}
-- 
2.52.0