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authorErik Hugne <erik.hugne@ericsson.com>2013-06-17 16:54:38 +0200
committerDavid S. Miller <davem@davemloft.net>2013-06-18 00:53:00 +0200
commit5d21cb70db0122507cd18f58b4a9112583c1e075 (patch)
tree4ab1cde607414ca63347dee9f70866c6d69892f6 /net/tipc
parenttipc: change socket buffer overflow control to respect sk_rcvbuf (diff)
downloadlinux-5d21cb70db0122507cd18f58b4a9112583c1e075.tar.xz
linux-5d21cb70db0122507cd18f58b4a9112583c1e075.zip
tipc: allow implicit connect for stream sockets
TIPC's implied connect feature, aka piggyback connect, allows applications to save one syscall and all SYN/SYN-ACK signalling overhead when setting up a connection. Until now, this has only been supported for SEQPACKET sockets. Here, we make it possible to use this feature even with stream sockets. At the connecting side, the connection is completed when the first data message arrives from the accepting peer. This means that we must allow the connecting user to call blocking recv() before the socket has reached state SS_CONNECTED. So we must must relax the state machine check at recv_stream(), and allow the recv() call even if socket is in state SS_CONNECTING. Signed-off-by: Erik Hugne <erik.hugne@ericsson.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc')
-rw-r--r--net/tipc/socket.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index aba4255f297b..d5fa708f037d 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -518,8 +518,7 @@ static int send_msg(struct kiocb *iocb, struct socket *sock,
res = -EISCONN;
goto exit;
}
- if ((tport->published) ||
- ((sock->type == SOCK_STREAM) && (total_len != 0))) {
+ if (tport->published) {
res = -EOPNOTSUPP;
goto exit;
}
@@ -1010,8 +1009,7 @@ static int recv_stream(struct kiocb *iocb, struct socket *sock,
lock_sock(sk);
- if (unlikely((sock->state == SS_UNCONNECTED) ||
- (sock->state == SS_CONNECTING))) {
+ if (unlikely((sock->state == SS_UNCONNECTED))) {
res = -ENOTCONN;
goto exit;
}