[Qemu-devel] [PATCH] Fix ping issue for linux-user guest

[Jing Huang <jing.huang.pku@gmail.com>]

This patch fix ping issues for linux-user guest.

* The do_setsockopts function in linux-user does not support SOL_RAW
socket which is used in ping net tool.

* The recvmsg in main_loop of ping could not fetch
sockaddr_in struct. That is because do_sendrecvmsg in linux-user does
not pass the msg->msg_name to the target.

We fix the above issues.


Signed-off-by: Jing Huang <jing.huang.pku@gmail.com>
---
 syscall.c        |    24 +++++++++++++++++++++++-
 1 files changed, 23 insertions(+), 1 deletions(-)

diff -git a/linux-user/syscall.c b/linux-user/syscall.c
index 5346554..3343345 e43f56
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -1349,7 +1349,13 @@target_cmsg->cmsg_len = tswapal(TARGET_CMSG_LEN(len));

         if (cmsg->cmsg_level != TARGET_SOL_SOCKET || cmsg->cmsg_type
!= SCM_RIGHTS) {
-            gemu_log("Unsupported ancillary data: %d/%d\n",
cmsg->cmsg_level, cmsg->cmsg_type);
+            if(cmsg->cmsg_type == SO_TIMESTAMP) {
+                /*copy msg_name to target_msgh*/
+                target_msgh->msg_namelen = msgh->msg_namelen;
+                memcpy(g2h((void *)(unsigned
long)(target_ulong)target_msgh->msg_name), msgh->msg_name,
msgh->msg_namelen);
+            } else {
+                gemu_log("Unsupported ancillary data: %d/%d\n",
cmsg->cmsg_level, cmsg->cmsg_type);
+            }
             memcpy(target_data, data, len);
         } else {
             int *fd = (int *)data;
@@ -1442,6 +1448,23 @@
             goto unimplemented;
         }
         break;
+    case SOL_RAW:
+    	switch (optname) {
+#define ICMP_FILTER 1
+        case ICMP_FILTER:
+            /*struct icmp_filter takes an u32 value*/
+            optname = ICMP_FILTER;
+            if (optlen < sizeof(uint32_t))
+                return -TARGET_EINVAL;
+
+            if (get_user_u32(val, optval_addr))
+                return -TARGET_EFAULT;
+            ret = get_errno(setsockopt(sockfd, level, optname, (char
*)&val, sizeof(val)));
+            break;
+        default:
+            goto unimplemented;
+        }
+        break;
     case TARGET_SOL_SOCKET:
         switch (optname) {
             /* Options with 'int' argument.  */