[Qemu-devel] [PULL 1/2] Add getsockopt for settable SOL_IPV6 options

[Laurent Vivier <laurent@vivier.eu>]

From: Tom Deseyn <tom.deseyn@gmail.com>

Signed-off-by: Tom Deseyn <tom.deseyn@gmail.com>
Message-Id: <20181213130611.7496-1-tom.deseyn@gmail.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
---
 linux-user/syscall.c | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 280137da8c..29bac79b61 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -2352,6 +2352,45 @@ static abi_long do_getsockopt(int sockfd, int level, int optname,
             break;
         }
         break;
+    case SOL_IPV6:
+        switch (optname) {
+        case IPV6_MTU_DISCOVER:
+        case IPV6_MTU:
+        case IPV6_V6ONLY:
+        case IPV6_RECVPKTINFO:
+        case IPV6_UNICAST_HOPS:
+        case IPV6_MULTICAST_HOPS:
+        case IPV6_MULTICAST_LOOP:
+        case IPV6_RECVERR:
+        case IPV6_RECVHOPLIMIT:
+        case IPV6_2292HOPLIMIT:
+        case IPV6_CHECKSUM:
+            if (get_user_u32(len, optlen))
+                return -TARGET_EFAULT;
+            if (len < 0)
+                return -TARGET_EINVAL;
+            lv = sizeof(lv);
+            ret = get_errno(getsockopt(sockfd, level, optname, &val, &lv));
+            if (ret < 0)
+                return ret;
+            if (len < sizeof(int) && len > 0 && val >= 0 && val < 255) {
+                len = 1;
+                if (put_user_u32(len, optlen)
+                    || put_user_u8(val, optval_addr))
+                    return -TARGET_EFAULT;
+            } else {
+                if (len > sizeof(int))
+                    len = sizeof(int);
+                if (put_user_u32(len, optlen)
+                    || put_user_u32(val, optval_addr))
+                    return -TARGET_EFAULT;
+            }
+            break;
+        default:
+            ret = -TARGET_ENOPROTOOPT;
+            break;
+        }
+        break;
     default:
     unimplemented:
         gemu_log("getsockopt level=%d optname=%d not yet supported\n",
-- 
2.20.1