import sys
import ovs.fatal_signal
+import ovs.poller
import ovs.vlog
vlog = ovs.vlog.Vlog("socket_util")
def check_connection_completion(sock):
- p = select.poll()
- p.register(sock, select.POLLOUT)
- if len(p.poll(0)) == 1:
- return get_socket_error(sock)
+ p = ovs.poller.SelectPoll()
+ p.register(sock, ovs.poller.POLLOUT)
+ pfds = p.poll(0)
+ if len(pfds) == 1:
+ revents = pfds[0][1]
+ if revents & ovs.poller.POLLERR:
+ try:
+ # The following should raise an exception.
+ socket.send("\0", socket.MSG_DONTWAIT)
+
+ # (Here's where we end up if it didn't.)
+ # XXX rate-limit
+ vlog.err("poll return POLLERR but send succeeded")
+ return errno.EPROTO
+ except socket.error, e:
+ return get_exception_errno(e)
+ else:
+ return 0
else:
return errno.EAGAIN
-def get_socket_error(sock):
- """Returns the errno value associated with 'socket' (0 if no error) and
- resets the socket's error status."""
- return sock.getsockopt(socket.SOL_SOCKET, socket.SO_ERROR)
+def inet_parse_active(target, default_port):
+ address = target.split(":")
+ host_name = address[0]
+ if not host_name:
+ raise ValueError("%s: bad peer name format" % target)
+ if len(address) >= 2:
+ port = int(address[1])
+ elif default_port:
+ port = default_port
+ else:
+ raise ValueError("%s: port number must be specified" % target)
+ return (host_name, port)
+
+
+def inet_open_active(style, target, default_port, dscp):
+ address = inet_parse_active(target, default_port)
+ try:
+ sock = socket.socket(socket.AF_INET, style, 0)
+ except socket.error, e:
+ return get_exception_errno(e), None
+
+ try:
+ set_nonblocking(sock)
+ set_dscp(sock, dscp)
+ try:
+ sock.connect(address)
+ except socket.error, e:
+ if get_exception_errno(e) != errno.EINPROGRESS:
+ raise
+ return 0, sock
+ except socket.error, e:
+ sock.close()
+ return get_exception_errno(e), None
def get_exception_errno(e):
sock.setblocking(0)
except socket.error, e:
vlog.err("could not set nonblocking mode on socket: %s"
- % os.strerror(get_socket_error(e)))
+ % os.strerror(get_exception_errno(e)))
+
+
+def set_dscp(sock, dscp):
+ if dscp > 63:
+ raise ValueError("Invalid dscp %d" % dscp)
+ val = dscp << 2
+ sock.setsockopt(socket.IPPROTO_IP, socket.IP_TOS, val)