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/*
* lsfd(1) - list file descriptors
*
* Copyright (C) 2022 Red Hat, Inc. All rights reserved.
* Written by Masatake YAMATO <yamato@redhat.com>
*
* Very generally based on lsof(8) by Victor A. Abell <abe@purdue.edu>
* It supports multiple OSes. lsfd specializes to Linux.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef UTIL_LINUX_LSFD_SOCK_H
#define UTIL_LINUX_LSFD_SOCK_H
#include <stdbool.h>
#include <sys/stat.h>
#include "libsmartcols.h"
/*
* xinfo: eXtra information about sockets
*/
struct sock_xinfo {
ino_t inode; /* inode in sockfs */
ino_t netns_inode; /* inode of the network namespace where
* the socket was created */
const struct sock_xinfo_class *class;
};
struct sock {
struct file file;
char *protoname;
struct sock_xinfo *xinfo;
struct ipc_endpoint endpoint;
/*
* There are two netns_inode fields reachable from struct sock:
*
* - sock->xinfo->netns_inode: filled via sock_diag netlink (when available)
* - sock->netns_inode: filled via ioctl(SIOCGSKNS)
*
* Use sock->netns_inode as a fallback when xinfo is unavailable or
* does not provide the netns inode.
*/
ino_t netns_inode;
};
struct sock_xinfo_class {
/* Methods for filling socket related columns */
char * (*get_name)(struct sock_xinfo *, struct sock *);
char * (*get_type)(struct sock_xinfo *, struct sock *);
char * (*get_state)(struct sock_xinfo *, struct sock *);
bool (*get_listening)(struct sock_xinfo *, struct sock *);
/* Method for class specific columns.
* Return true when the method fills the column. */
bool (*fill_column)(struct proc *,
struct sock_xinfo *,
struct sock *,
struct libscols_line *,
int,
size_t,
char **str);
struct ipc_class *(*get_ipc_class)(struct sock_xinfo *, struct sock *);
void (*free)(struct sock_xinfo *);
};
void initialize_sock_xinfos(void);
void finalize_sock_xinfos(void);
struct sock_xinfo *get_sock_xinfo(ino_t inode);
#endif /* UTIL_LINUX_LSFD_SOCK_H */
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