Add a virNetSocketNewConnectSockFD method

To allow creation of a virNetSocketPtr instance from a pre-opened
socketpair FD, add a virNetSocketNewConnectSockFD method.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

src/libvirt_private.syms

@@ -1011,6 +1011,7 @@ virNetSocketLocalAddrString;
 virNetSocketNewConnectCommand;
 virNetSocketNewConnectExternal;
 virNetSocketNewConnectLibSSH2;
+virNetSocketNewConnectSockFD;
 virNetSocketNewConnectSSH;
 virNetSocketNewConnectTCP;
 virNetSocketNewConnectUNIX;

src/rpc/virnetsocket.c

@@ -884,6 +884,24 @@ int virNetSocketNewConnectExternal(const char **cmdargv,
 }
 
 
+int virNetSocketNewConnectSockFD(int sockfd,
+                                 virNetSocketPtr *retsock)
+{
+    virSocketAddr localAddr;
+
+    localAddr.len = sizeof(localAddr.data);
+    if (getsockname(sockfd, &localAddr.data.sa, &localAddr.len) < 0) {
+        virReportSystemError(errno, "%s", _("Unable to get local socket name"));
+        return -1;
+    }
+
+    if (!(*retsock = virNetSocketNew(&localAddr, NULL, true, sockfd, -1, -1)))
+        return -1;
+
+    return 0;
+}
+
+
 virNetSocketPtr virNetSocketNewPostExecRestart(virJSONValuePtr object)
 {
     virSocketAddr localAddr;

src/rpc/virnetsocket.h

@@ -97,6 +97,8 @@ int virNetSocketNewConnectLibSSH2(const char *host,
 int virNetSocketNewConnectExternal(const char **cmdargv,
                                    virNetSocketPtr *addr);
 
+int virNetSocketNewConnectSockFD(int sockfd,
+                                 virNetSocketPtr *retsock);
 
 virNetSocketPtr virNetSocketNewPostExecRestart(virJSONValuePtr object);