Fix pal_networking.c compilation error on some platforms (#25687)

1 files changed, 24 insertions, 11 deletions

diff --git a/src/Native/Unix/System.Native/pal_networking.c b/src/Native/Unix/System.Native/pal_networking.c
index 545fe9e025..9815f82e3e 100644
--- a/src/Native/Unix/System.Native/pal_networking.c
+++ b/src/Native/Unix/System.Native/pal_networking.c
@@ -2272,35 +2272,48 @@ int32_t SystemNative_Socket(int32_t addressFamily, int32_t socketType, int32_t p
     return *createdSocket != -1 ? Error_SUCCESS : SystemNative_ConvertErrorPlatformToPal(errno);
 }
 
-int32_t GetInt32Ioctl(intptr_t socket, unsigned long request, int32_t* available)
+int32_t SystemNative_GetAtOutOfBandMark(intptr_t socket, int32_t* atMark)
 {
-    if (available == NULL)
+    if (atMark == NULL)
     {
         return Error_EFAULT;
     }
 
     int fd = ToFileDescriptor(socket);
 
-    int avail;
+    int result;
     int err;
-    while ((err = ioctl(fd, request, &avail)) < 0 && errno == EINTR);
+    while ((err = ioctl(fd, SIOCATMARK, &result)) < 0 && errno == EINTR);
     if (err == -1)
     {
+        *atMark = 0;
         return SystemNative_ConvertErrorPlatformToPal(errno);
     }
 
-    *available = (int32_t)avail;
+    *atMark = (int32_t)result;
     return Error_SUCCESS;
 }
 
-int32_t SystemNative_GetAtOutOfBandMark(intptr_t socket, int32_t* available)
-{
-    return GetInt32Ioctl(socket, SIOCATMARK, available);
-}
-
 int32_t SystemNative_GetBytesAvailable(intptr_t socket, int32_t* available)
 {
-    return GetInt32Ioctl(socket, FIONREAD, available);
+    if (available == NULL)
+    {
+        return Error_EFAULT;
+    }
+
+    int fd = ToFileDescriptor(socket);
+
+    int result;
+    int err;
+    while ((err = ioctl(fd, FIONREAD, &result)) < 0 && errno == EINTR);
+    if (err == -1)
+    {
+        *available = 0;
+        return SystemNative_ConvertErrorPlatformToPal(errno);
+    }
+
+    *available = (int32_t)result;
+    return Error_SUCCESS;
 }
 
 #if HAVE_EPOLL