mirror of
https://github.com/torvalds/linux.git
synced 2024-11-25 05:32:00 +00:00
91051f0039
Walk the hashinfo->bhash2 table so that inet_diag can dump TCP sockets that are bound but haven't yet called connect() or listen(). The code is inspired by the ->lhash2 loop. However there's no manual test of the source port, since this kind of filtering is already handled by inet_diag_bc_sk(). Also, a maximum of 16 sockets are dumped at a time, to avoid running with bh disabled for too long. There's no TCP state for bound but otherwise inactive sockets. Such sockets normally map to TCP_CLOSE. However, "ss -l", which is supposed to only dump listening sockets, actually requests the kernel to dump sockets in either the TCP_LISTEN or TCP_CLOSE states. To avoid dumping bound-only sockets with "ss -l", we therefore need to define a new pseudo-state (TCP_BOUND_INACTIVE) that user space will be able to set explicitly. With an IPv4, an IPv6 and an IPv6-only socket, bound respectively to 40000, 64000, 60000, an updated version of iproute2 could work as follow: $ ss -t state bound-inactive Recv-Q Send-Q Local Address:Port Peer Address:Port Process 0 0 0.0.0.0:40000 0.0.0.0:* 0 0 [::]:60000 [::]:* 0 0 *:64000 *:* Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Guillaume Nault <gnault@redhat.com> Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com> Link: https://lore.kernel.org/r/b3a84ae61e19c06806eea9c602b3b66e8f0cfc81.1701362867.git.gnault@redhat.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* INET An implementation of the TCP/IP protocol suite for the LINUX
|
|
* operating system. INET is implemented using the BSD Socket
|
|
* interface as the means of communication with the user level.
|
|
*
|
|
* Definitions for the TCP protocol sk_state field.
|
|
*/
|
|
#ifndef _LINUX_TCP_STATES_H
|
|
#define _LINUX_TCP_STATES_H
|
|
|
|
enum {
|
|
TCP_ESTABLISHED = 1,
|
|
TCP_SYN_SENT,
|
|
TCP_SYN_RECV,
|
|
TCP_FIN_WAIT1,
|
|
TCP_FIN_WAIT2,
|
|
TCP_TIME_WAIT,
|
|
TCP_CLOSE,
|
|
TCP_CLOSE_WAIT,
|
|
TCP_LAST_ACK,
|
|
TCP_LISTEN,
|
|
TCP_CLOSING, /* Now a valid state */
|
|
TCP_NEW_SYN_RECV,
|
|
TCP_BOUND_INACTIVE, /* Pseudo-state for inet_diag */
|
|
|
|
TCP_MAX_STATES /* Leave at the end! */
|
|
};
|
|
|
|
#define TCP_STATE_MASK 0xF
|
|
|
|
#define TCP_ACTION_FIN (1 << TCP_CLOSE)
|
|
|
|
enum {
|
|
TCPF_ESTABLISHED = (1 << TCP_ESTABLISHED),
|
|
TCPF_SYN_SENT = (1 << TCP_SYN_SENT),
|
|
TCPF_SYN_RECV = (1 << TCP_SYN_RECV),
|
|
TCPF_FIN_WAIT1 = (1 << TCP_FIN_WAIT1),
|
|
TCPF_FIN_WAIT2 = (1 << TCP_FIN_WAIT2),
|
|
TCPF_TIME_WAIT = (1 << TCP_TIME_WAIT),
|
|
TCPF_CLOSE = (1 << TCP_CLOSE),
|
|
TCPF_CLOSE_WAIT = (1 << TCP_CLOSE_WAIT),
|
|
TCPF_LAST_ACK = (1 << TCP_LAST_ACK),
|
|
TCPF_LISTEN = (1 << TCP_LISTEN),
|
|
TCPF_CLOSING = (1 << TCP_CLOSING),
|
|
TCPF_NEW_SYN_RECV = (1 << TCP_NEW_SYN_RECV),
|
|
TCPF_BOUND_INACTIVE = (1 << TCP_BOUND_INACTIVE),
|
|
};
|
|
|
|
#endif /* _LINUX_TCP_STATES_H */
|