[Qemu-devel] [RFC][PATCH 05/15] virtproxy: add accept handler for communication channel

[Michael Roth <mdroth@linux.vnet.ibm.com>]

This accept()'s connections to the socket we told virt-proxy to listen
for the channel connection on and sets the appropriate read handler for
the resulting FD.

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 virtproxy.c |   37 +++++++++++++++++++++++++++++++++++++
 1 files changed, 37 insertions(+), 0 deletions(-)

diff --git a/virtproxy.c b/virtproxy.c
index fa17722..20532c2 100644
--- a/virtproxy.c
+++ b/virtproxy.c
@@ -166,6 +166,8 @@ static VPConn *get_conn(const VPDriver *drv, int fd, bool client)
     return NULL;
 }
 
+static void vp_channel_accept(void *opaque);
+
 /* get VPOForward by service_id */
 static VPOForward *get_oforward(const VPDriver *drv, const char *service_id)
 {
@@ -193,3 +195,38 @@ static VPIForward *get_iforward(const VPDriver *drv, const char *service_id)
 
     return NULL;
 }
+
+/* accept handler for communication channel
+ *
+ * accept()s connection to communication channel (for sockets), and sets
+ * up the read handler for resulting FD.
+ */
+static void vp_channel_accept(void *opaque)
+{
+    VPDriver *drv = opaque;
+    struct sockaddr_in saddr;
+    struct sockaddr *addr;
+    socklen_t len;
+    int fd;
+
+    TRACE("called with opaque: %p", drv);
+
+    for(;;) {
+        len = sizeof(saddr);
+        addr = (struct sockaddr *)&saddr;
+        fd = qemu_accept(drv->listen_fd, addr, &len);
+
+        if (fd < 0 && errno != EINTR) {
+            TRACE("accept() failed");
+            return;
+        } else if (fd >= 0) {
+            TRACE("accepted connection");
+            break;
+        }
+    }
+
+    drv->channel_fd = fd;
+    vp_set_fd_handler(drv->channel_fd, vp_channel_read, NULL, drv);
+    /* dont accept anymore connections until channel_fd is closed */
+    vp_set_fd_handler(drv->listen_fd, NULL, NULL, NULL);
+}
-- 
1.7.0.4