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xianfeng |
/*
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* inet_diag.c Module for monitoring INET transport protocols sockets.
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*
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* Version: $Id: inet_diag.c,v 1.3 2002/02/01 22:01:04 davem Exp $
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*
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* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/fcntl.h>
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#include <linux/random.h>
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#include <linux/cache.h>
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#include <linux/init.h>
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#include <linux/time.h>
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#include <net/icmp.h>
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#include <net/tcp.h>
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#include <net/ipv6.h>
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#include <net/inet_common.h>
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#include <net/inet_connection_sock.h>
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#include <net/inet_hashtables.h>
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#include <net/inet_timewait_sock.h>
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#include <net/inet6_hashtables.h>
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#include <net/netlink.h>
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#include <linux/inet.h>
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#include <linux/stddef.h>
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#include <linux/inet_diag.h>
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static const struct inet_diag_handler **inet_diag_table;
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struct inet_diag_entry {
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__be32 *saddr;
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__be32 *daddr;
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u16 sport;
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u16 dport;
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u16 family;
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u16 userlocks;
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};
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static struct sock *idiagnl;
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#define INET_DIAG_PUT(skb, attrtype, attrlen) \
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RTA_DATA(__RTA_PUT(skb, attrtype, attrlen))
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static DEFINE_MUTEX(inet_diag_table_mutex);
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static const struct inet_diag_handler *inet_diag_lock_handler(int type)
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{
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#ifdef CONFIG_KMOD
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if (!inet_diag_table[type])
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request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK,
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NETLINK_INET_DIAG, type);
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#endif
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mutex_lock(&inet_diag_table_mutex);
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if (!inet_diag_table[type])
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return ERR_PTR(-ENOENT);
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| 68 |
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return inet_diag_table[type];
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}
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static inline void inet_diag_unlock_handler(
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const struct inet_diag_handler *handler)
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{
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mutex_unlock(&inet_diag_table_mutex);
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}
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static int inet_csk_diag_fill(struct sock *sk,
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struct sk_buff *skb,
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int ext, u32 pid, u32 seq, u16 nlmsg_flags,
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const struct nlmsghdr *unlh)
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{
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const struct inet_sock *inet = inet_sk(sk);
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const struct inet_connection_sock *icsk = inet_csk(sk);
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struct inet_diag_msg *r;
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struct nlmsghdr *nlh;
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void *info = NULL;
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struct inet_diag_meminfo *minfo = NULL;
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unsigned char *b = skb_tail_pointer(skb);
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const struct inet_diag_handler *handler;
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handler = inet_diag_table[unlh->nlmsg_type];
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BUG_ON(handler == NULL);
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nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
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nlh->nlmsg_flags = nlmsg_flags;
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| 97 |
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r = NLMSG_DATA(nlh);
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BUG_ON(sk->sk_state == TCP_TIME_WAIT);
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if (ext & (1 << (INET_DIAG_MEMINFO - 1)))
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minfo = INET_DIAG_PUT(skb, INET_DIAG_MEMINFO, sizeof(*minfo));
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| 103 |
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if (ext & (1 << (INET_DIAG_INFO - 1)))
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info = INET_DIAG_PUT(skb, INET_DIAG_INFO,
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handler->idiag_info_size);
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if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) {
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const size_t len = strlen(icsk->icsk_ca_ops->name);
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| 110 |
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strcpy(INET_DIAG_PUT(skb, INET_DIAG_CONG, len + 1),
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icsk->icsk_ca_ops->name);
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}
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| 113 |
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r->idiag_family = sk->sk_family;
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r->idiag_state = sk->sk_state;
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r->idiag_timer = 0;
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r->idiag_retrans = 0;
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r->id.idiag_if = sk->sk_bound_dev_if;
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r->id.idiag_cookie[0] = (u32)(unsigned long)sk;
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r->id.idiag_cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1);
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| 123 |
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r->id.idiag_sport = inet->sport;
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r->id.idiag_dport = inet->dport;
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r->id.idiag_src[0] = inet->rcv_saddr;
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r->id.idiag_dst[0] = inet->daddr;
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| 128 |
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#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
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if (r->idiag_family == AF_INET6) {
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| 130 |
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struct ipv6_pinfo *np = inet6_sk(sk);
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| 131 |
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| 132 |
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ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
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&np->rcv_saddr);
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ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
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&np->daddr);
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}
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#endif
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| 138 |
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| 139 |
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#define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ)
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| 140 |
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| 141 |
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if (icsk->icsk_pending == ICSK_TIME_RETRANS) {
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r->idiag_timer = 1;
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r->idiag_retrans = icsk->icsk_retransmits;
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r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
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} else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
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r->idiag_timer = 4;
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r->idiag_retrans = icsk->icsk_probes_out;
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| 148 |
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r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
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| 149 |
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} else if (timer_pending(&sk->sk_timer)) {
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r->idiag_timer = 2;
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r->idiag_retrans = icsk->icsk_probes_out;
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r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
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} else {
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r->idiag_timer = 0;
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r->idiag_expires = 0;
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}
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| 157 |
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#undef EXPIRES_IN_MS
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| 158 |
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| 159 |
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r->idiag_uid = sock_i_uid(sk);
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| 160 |
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r->idiag_inode = sock_i_ino(sk);
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| 161 |
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| 162 |
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if (minfo) {
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| 163 |
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minfo->idiag_rmem = atomic_read(&sk->sk_rmem_alloc);
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| 164 |
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minfo->idiag_wmem = sk->sk_wmem_queued;
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| 165 |
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minfo->idiag_fmem = sk->sk_forward_alloc;
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| 166 |
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minfo->idiag_tmem = atomic_read(&sk->sk_wmem_alloc);
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| 167 |
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}
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| 168 |
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| 169 |
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handler->idiag_get_info(sk, r, info);
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| 170 |
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| 171 |
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if (sk->sk_state < TCP_TIME_WAIT &&
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| 172 |
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icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info)
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| 173 |
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icsk->icsk_ca_ops->get_info(sk, ext, skb);
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| 174 |
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| 175 |
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nlh->nlmsg_len = skb_tail_pointer(skb) - b;
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| 176 |
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return skb->len;
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| 177 |
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|
| 178 |
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rtattr_failure:
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| 179 |
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nlmsg_failure:
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| 180 |
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nlmsg_trim(skb, b);
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| 181 |
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return -EMSGSIZE;
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| 182 |
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}
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| 183 |
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| 184 |
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static int inet_twsk_diag_fill(struct inet_timewait_sock *tw,
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| 185 |
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struct sk_buff *skb, int ext, u32 pid,
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| 186 |
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u32 seq, u16 nlmsg_flags,
|
| 187 |
|
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const struct nlmsghdr *unlh)
|
| 188 |
|
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{
|
| 189 |
|
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long tmo;
|
| 190 |
|
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struct inet_diag_msg *r;
|
| 191 |
|
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const unsigned char *previous_tail = skb_tail_pointer(skb);
|
| 192 |
|
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struct nlmsghdr *nlh = NLMSG_PUT(skb, pid, seq,
|
| 193 |
|
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unlh->nlmsg_type, sizeof(*r));
|
| 194 |
|
|
|
| 195 |
|
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r = NLMSG_DATA(nlh);
|
| 196 |
|
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BUG_ON(tw->tw_state != TCP_TIME_WAIT);
|
| 197 |
|
|
|
| 198 |
|
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nlh->nlmsg_flags = nlmsg_flags;
|
| 199 |
|
|
|
| 200 |
|
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tmo = tw->tw_ttd - jiffies;
|
| 201 |
|
|
if (tmo < 0)
|
| 202 |
|
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tmo = 0;
|
| 203 |
|
|
|
| 204 |
|
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r->idiag_family = tw->tw_family;
|
| 205 |
|
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r->idiag_state = tw->tw_state;
|
| 206 |
|
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r->idiag_timer = 0;
|
| 207 |
|
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r->idiag_retrans = 0;
|
| 208 |
|
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r->id.idiag_if = tw->tw_bound_dev_if;
|
| 209 |
|
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r->id.idiag_cookie[0] = (u32)(unsigned long)tw;
|
| 210 |
|
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r->id.idiag_cookie[1] = (u32)(((unsigned long)tw >> 31) >> 1);
|
| 211 |
|
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r->id.idiag_sport = tw->tw_sport;
|
| 212 |
|
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r->id.idiag_dport = tw->tw_dport;
|
| 213 |
|
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r->id.idiag_src[0] = tw->tw_rcv_saddr;
|
| 214 |
|
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r->id.idiag_dst[0] = tw->tw_daddr;
|
| 215 |
|
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r->idiag_state = tw->tw_substate;
|
| 216 |
|
|
r->idiag_timer = 3;
|
| 217 |
|
|
r->idiag_expires = DIV_ROUND_UP(tmo * 1000, HZ);
|
| 218 |
|
|
r->idiag_rqueue = 0;
|
| 219 |
|
|
r->idiag_wqueue = 0;
|
| 220 |
|
|
r->idiag_uid = 0;
|
| 221 |
|
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r->idiag_inode = 0;
|
| 222 |
|
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#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
|
| 223 |
|
|
if (tw->tw_family == AF_INET6) {
|
| 224 |
|
|
const struct inet6_timewait_sock *tw6 =
|
| 225 |
|
|
inet6_twsk((struct sock *)tw);
|
| 226 |
|
|
|
| 227 |
|
|
ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
|
| 228 |
|
|
&tw6->tw_v6_rcv_saddr);
|
| 229 |
|
|
ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
|
| 230 |
|
|
&tw6->tw_v6_daddr);
|
| 231 |
|
|
}
|
| 232 |
|
|
#endif
|
| 233 |
|
|
nlh->nlmsg_len = skb_tail_pointer(skb) - previous_tail;
|
| 234 |
|
|
return skb->len;
|
| 235 |
|
|
nlmsg_failure:
|
| 236 |
|
|
nlmsg_trim(skb, previous_tail);
|
| 237 |
|
|
return -EMSGSIZE;
|
| 238 |
|
|
}
|
| 239 |
|
|
|
| 240 |
|
|
static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
|
| 241 |
|
|
int ext, u32 pid, u32 seq, u16 nlmsg_flags,
|
| 242 |
|
|
const struct nlmsghdr *unlh)
|
| 243 |
|
|
{
|
| 244 |
|
|
if (sk->sk_state == TCP_TIME_WAIT)
|
| 245 |
|
|
return inet_twsk_diag_fill((struct inet_timewait_sock *)sk,
|
| 246 |
|
|
skb, ext, pid, seq, nlmsg_flags,
|
| 247 |
|
|
unlh);
|
| 248 |
|
|
return inet_csk_diag_fill(sk, skb, ext, pid, seq, nlmsg_flags, unlh);
|
| 249 |
|
|
}
|
| 250 |
|
|
|
| 251 |
|
|
static int inet_diag_get_exact(struct sk_buff *in_skb,
|
| 252 |
|
|
const struct nlmsghdr *nlh)
|
| 253 |
|
|
{
|
| 254 |
|
|
int err;
|
| 255 |
|
|
struct sock *sk;
|
| 256 |
|
|
struct inet_diag_req *req = NLMSG_DATA(nlh);
|
| 257 |
|
|
struct sk_buff *rep;
|
| 258 |
|
|
struct inet_hashinfo *hashinfo;
|
| 259 |
|
|
const struct inet_diag_handler *handler;
|
| 260 |
|
|
|
| 261 |
|
|
handler = inet_diag_lock_handler(nlh->nlmsg_type);
|
| 262 |
|
|
if (!handler)
|
| 263 |
|
|
return -ENOENT;
|
| 264 |
|
|
|
| 265 |
|
|
hashinfo = handler->idiag_hashinfo;
|
| 266 |
|
|
err = -EINVAL;
|
| 267 |
|
|
|
| 268 |
|
|
if (req->idiag_family == AF_INET) {
|
| 269 |
|
|
sk = inet_lookup(hashinfo, req->id.idiag_dst[0],
|
| 270 |
|
|
req->id.idiag_dport, req->id.idiag_src[0],
|
| 271 |
|
|
req->id.idiag_sport, req->id.idiag_if);
|
| 272 |
|
|
}
|
| 273 |
|
|
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
|
| 274 |
|
|
else if (req->idiag_family == AF_INET6) {
|
| 275 |
|
|
sk = inet6_lookup(hashinfo,
|
| 276 |
|
|
(struct in6_addr *)req->id.idiag_dst,
|
| 277 |
|
|
req->id.idiag_dport,
|
| 278 |
|
|
(struct in6_addr *)req->id.idiag_src,
|
| 279 |
|
|
req->id.idiag_sport,
|
| 280 |
|
|
req->id.idiag_if);
|
| 281 |
|
|
}
|
| 282 |
|
|
#endif
|
| 283 |
|
|
else {
|
| 284 |
|
|
goto unlock;
|
| 285 |
|
|
}
|
| 286 |
|
|
|
| 287 |
|
|
err = -ENOENT;
|
| 288 |
|
|
if (sk == NULL)
|
| 289 |
|
|
goto unlock;
|
| 290 |
|
|
|
| 291 |
|
|
err = -ESTALE;
|
| 292 |
|
|
if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE ||
|
| 293 |
|
|
req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) &&
|
| 294 |
|
|
((u32)(unsigned long)sk != req->id.idiag_cookie[0] ||
|
| 295 |
|
|
(u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1]))
|
| 296 |
|
|
goto out;
|
| 297 |
|
|
|
| 298 |
|
|
err = -ENOMEM;
|
| 299 |
|
|
rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) +
|
| 300 |
|
|
sizeof(struct inet_diag_meminfo) +
|
| 301 |
|
|
handler->idiag_info_size + 64)),
|
| 302 |
|
|
GFP_KERNEL);
|
| 303 |
|
|
if (!rep)
|
| 304 |
|
|
goto out;
|
| 305 |
|
|
|
| 306 |
|
|
err = sk_diag_fill(sk, rep, req->idiag_ext,
|
| 307 |
|
|
NETLINK_CB(in_skb).pid,
|
| 308 |
|
|
nlh->nlmsg_seq, 0, nlh);
|
| 309 |
|
|
if (err < 0) {
|
| 310 |
|
|
WARN_ON(err == -EMSGSIZE);
|
| 311 |
|
|
kfree_skb(rep);
|
| 312 |
|
|
goto out;
|
| 313 |
|
|
}
|
| 314 |
|
|
err = netlink_unicast(idiagnl, rep, NETLINK_CB(in_skb).pid,
|
| 315 |
|
|
MSG_DONTWAIT);
|
| 316 |
|
|
if (err > 0)
|
| 317 |
|
|
err = 0;
|
| 318 |
|
|
|
| 319 |
|
|
out:
|
| 320 |
|
|
if (sk) {
|
| 321 |
|
|
if (sk->sk_state == TCP_TIME_WAIT)
|
| 322 |
|
|
inet_twsk_put((struct inet_timewait_sock *)sk);
|
| 323 |
|
|
else
|
| 324 |
|
|
sock_put(sk);
|
| 325 |
|
|
}
|
| 326 |
|
|
unlock:
|
| 327 |
|
|
inet_diag_unlock_handler(handler);
|
| 328 |
|
|
return err;
|
| 329 |
|
|
}
|
| 330 |
|
|
|
| 331 |
|
|
static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits)
|
| 332 |
|
|
{
|
| 333 |
|
|
int words = bits >> 5;
|
| 334 |
|
|
|
| 335 |
|
|
bits &= 0x1f;
|
| 336 |
|
|
|
| 337 |
|
|
if (words) {
|
| 338 |
|
|
if (memcmp(a1, a2, words << 2))
|
| 339 |
|
|
return 0;
|
| 340 |
|
|
}
|
| 341 |
|
|
if (bits) {
|
| 342 |
|
|
__be32 w1, w2;
|
| 343 |
|
|
__be32 mask;
|
| 344 |
|
|
|
| 345 |
|
|
w1 = a1[words];
|
| 346 |
|
|
w2 = a2[words];
|
| 347 |
|
|
|
| 348 |
|
|
mask = htonl((0xffffffff) << (32 - bits));
|
| 349 |
|
|
|
| 350 |
|
|
if ((w1 ^ w2) & mask)
|
| 351 |
|
|
return 0;
|
| 352 |
|
|
}
|
| 353 |
|
|
|
| 354 |
|
|
return 1;
|
| 355 |
|
|
}
|
| 356 |
|
|
|
| 357 |
|
|
|
| 358 |
|
|
static int inet_diag_bc_run(const void *bc, int len,
|
| 359 |
|
|
const struct inet_diag_entry *entry)
|
| 360 |
|
|
{
|
| 361 |
|
|
while (len > 0) {
|
| 362 |
|
|
int yes = 1;
|
| 363 |
|
|
const struct inet_diag_bc_op *op = bc;
|
| 364 |
|
|
|
| 365 |
|
|
switch (op->code) {
|
| 366 |
|
|
case INET_DIAG_BC_NOP:
|
| 367 |
|
|
break;
|
| 368 |
|
|
case INET_DIAG_BC_JMP:
|
| 369 |
|
|
yes = 0;
|
| 370 |
|
|
break;
|
| 371 |
|
|
case INET_DIAG_BC_S_GE:
|
| 372 |
|
|
yes = entry->sport >= op[1].no;
|
| 373 |
|
|
break;
|
| 374 |
|
|
case INET_DIAG_BC_S_LE:
|
| 375 |
|
|
yes = entry->dport <= op[1].no;
|
| 376 |
|
|
break;
|
| 377 |
|
|
case INET_DIAG_BC_D_GE:
|
| 378 |
|
|
yes = entry->dport >= op[1].no;
|
| 379 |
|
|
break;
|
| 380 |
|
|
case INET_DIAG_BC_D_LE:
|
| 381 |
|
|
yes = entry->dport <= op[1].no;
|
| 382 |
|
|
break;
|
| 383 |
|
|
case INET_DIAG_BC_AUTO:
|
| 384 |
|
|
yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
|
| 385 |
|
|
break;
|
| 386 |
|
|
case INET_DIAG_BC_S_COND:
|
| 387 |
|
|
case INET_DIAG_BC_D_COND: {
|
| 388 |
|
|
struct inet_diag_hostcond *cond;
|
| 389 |
|
|
__be32 *addr;
|
| 390 |
|
|
|
| 391 |
|
|
cond = (struct inet_diag_hostcond *)(op + 1);
|
| 392 |
|
|
if (cond->port != -1 &&
|
| 393 |
|
|
cond->port != (op->code == INET_DIAG_BC_S_COND ?
|
| 394 |
|
|
entry->sport : entry->dport)) {
|
| 395 |
|
|
yes = 0;
|
| 396 |
|
|
break;
|
| 397 |
|
|
}
|
| 398 |
|
|
|
| 399 |
|
|
if (cond->prefix_len == 0)
|
| 400 |
|
|
break;
|
| 401 |
|
|
|
| 402 |
|
|
if (op->code == INET_DIAG_BC_S_COND)
|
| 403 |
|
|
addr = entry->saddr;
|
| 404 |
|
|
else
|
| 405 |
|
|
addr = entry->daddr;
|
| 406 |
|
|
|
| 407 |
|
|
if (bitstring_match(addr, cond->addr,
|
| 408 |
|
|
cond->prefix_len))
|
| 409 |
|
|
break;
|
| 410 |
|
|
if (entry->family == AF_INET6 &&
|
| 411 |
|
|
cond->family == AF_INET) {
|
| 412 |
|
|
if (addr[0] == 0 && addr[1] == 0 &&
|
| 413 |
|
|
addr[2] == htonl(0xffff) &&
|
| 414 |
|
|
bitstring_match(addr + 3, cond->addr,
|
| 415 |
|
|
cond->prefix_len))
|
| 416 |
|
|
break;
|
| 417 |
|
|
}
|
| 418 |
|
|
yes = 0;
|
| 419 |
|
|
break;
|
| 420 |
|
|
}
|
| 421 |
|
|
}
|
| 422 |
|
|
|
| 423 |
|
|
if (yes) {
|
| 424 |
|
|
len -= op->yes;
|
| 425 |
|
|
bc += op->yes;
|
| 426 |
|
|
} else {
|
| 427 |
|
|
len -= op->no;
|
| 428 |
|
|
bc += op->no;
|
| 429 |
|
|
}
|
| 430 |
|
|
}
|
| 431 |
|
|
return (len == 0);
|
| 432 |
|
|
}
|
| 433 |
|
|
|
| 434 |
|
|
static int valid_cc(const void *bc, int len, int cc)
|
| 435 |
|
|
{
|
| 436 |
|
|
while (len >= 0) {
|
| 437 |
|
|
const struct inet_diag_bc_op *op = bc;
|
| 438 |
|
|
|
| 439 |
|
|
if (cc > len)
|
| 440 |
|
|
return 0;
|
| 441 |
|
|
if (cc == len)
|
| 442 |
|
|
return 1;
|
| 443 |
|
|
if (op->yes < 4)
|
| 444 |
|
|
return 0;
|
| 445 |
|
|
len -= op->yes;
|
| 446 |
|
|
bc += op->yes;
|
| 447 |
|
|
}
|
| 448 |
|
|
return 0;
|
| 449 |
|
|
}
|
| 450 |
|
|
|
| 451 |
|
|
static int inet_diag_bc_audit(const void *bytecode, int bytecode_len)
|
| 452 |
|
|
{
|
| 453 |
|
|
const unsigned char *bc = bytecode;
|
| 454 |
|
|
int len = bytecode_len;
|
| 455 |
|
|
|
| 456 |
|
|
while (len > 0) {
|
| 457 |
|
|
struct inet_diag_bc_op *op = (struct inet_diag_bc_op *)bc;
|
| 458 |
|
|
|
| 459 |
|
|
//printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len);
|
| 460 |
|
|
switch (op->code) {
|
| 461 |
|
|
case INET_DIAG_BC_AUTO:
|
| 462 |
|
|
case INET_DIAG_BC_S_COND:
|
| 463 |
|
|
case INET_DIAG_BC_D_COND:
|
| 464 |
|
|
case INET_DIAG_BC_S_GE:
|
| 465 |
|
|
case INET_DIAG_BC_S_LE:
|
| 466 |
|
|
case INET_DIAG_BC_D_GE:
|
| 467 |
|
|
case INET_DIAG_BC_D_LE:
|
| 468 |
|
|
if (op->yes < 4 || op->yes > len + 4)
|
| 469 |
|
|
return -EINVAL;
|
| 470 |
|
|
case INET_DIAG_BC_JMP:
|
| 471 |
|
|
if (op->no < 4 || op->no > len + 4)
|
| 472 |
|
|
return -EINVAL;
|
| 473 |
|
|
if (op->no < len &&
|
| 474 |
|
|
!valid_cc(bytecode, bytecode_len, len - op->no))
|
| 475 |
|
|
return -EINVAL;
|
| 476 |
|
|
break;
|
| 477 |
|
|
case INET_DIAG_BC_NOP:
|
| 478 |
|
|
if (op->yes < 4 || op->yes > len + 4)
|
| 479 |
|
|
return -EINVAL;
|
| 480 |
|
|
break;
|
| 481 |
|
|
default:
|
| 482 |
|
|
return -EINVAL;
|
| 483 |
|
|
}
|
| 484 |
|
|
bc += op->yes;
|
| 485 |
|
|
len -= op->yes;
|
| 486 |
|
|
}
|
| 487 |
|
|
return len == 0 ? 0 : -EINVAL;
|
| 488 |
|
|
}
|
| 489 |
|
|
|
| 490 |
|
|
static int inet_csk_diag_dump(struct sock *sk,
|
| 491 |
|
|
struct sk_buff *skb,
|
| 492 |
|
|
struct netlink_callback *cb)
|
| 493 |
|
|
{
|
| 494 |
|
|
struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
|
| 495 |
|
|
|
| 496 |
|
|
if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
|
| 497 |
|
|
struct inet_diag_entry entry;
|
| 498 |
|
|
struct rtattr *bc = (struct rtattr *)(r + 1);
|
| 499 |
|
|
struct inet_sock *inet = inet_sk(sk);
|
| 500 |
|
|
|
| 501 |
|
|
entry.family = sk->sk_family;
|
| 502 |
|
|
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
|
| 503 |
|
|
if (entry.family == AF_INET6) {
|
| 504 |
|
|
struct ipv6_pinfo *np = inet6_sk(sk);
|
| 505 |
|
|
|
| 506 |
|
|
entry.saddr = np->rcv_saddr.s6_addr32;
|
| 507 |
|
|
entry.daddr = np->daddr.s6_addr32;
|
| 508 |
|
|
} else
|
| 509 |
|
|
#endif
|
| 510 |
|
|
{
|
| 511 |
|
|
entry.saddr = &inet->rcv_saddr;
|
| 512 |
|
|
entry.daddr = &inet->daddr;
|
| 513 |
|
|
}
|
| 514 |
|
|
entry.sport = inet->num;
|
| 515 |
|
|
entry.dport = ntohs(inet->dport);
|
| 516 |
|
|
entry.userlocks = sk->sk_userlocks;
|
| 517 |
|
|
|
| 518 |
|
|
if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry))
|
| 519 |
|
|
return 0;
|
| 520 |
|
|
}
|
| 521 |
|
|
|
| 522 |
|
|
return inet_csk_diag_fill(sk, skb, r->idiag_ext,
|
| 523 |
|
|
NETLINK_CB(cb->skb).pid,
|
| 524 |
|
|
cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
|
| 525 |
|
|
}
|
| 526 |
|
|
|
| 527 |
|
|
static int inet_twsk_diag_dump(struct inet_timewait_sock *tw,
|
| 528 |
|
|
struct sk_buff *skb,
|
| 529 |
|
|
struct netlink_callback *cb)
|
| 530 |
|
|
{
|
| 531 |
|
|
struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
|
| 532 |
|
|
|
| 533 |
|
|
if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
|
| 534 |
|
|
struct inet_diag_entry entry;
|
| 535 |
|
|
struct rtattr *bc = (struct rtattr *)(r + 1);
|
| 536 |
|
|
|
| 537 |
|
|
entry.family = tw->tw_family;
|
| 538 |
|
|
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
|
| 539 |
|
|
if (tw->tw_family == AF_INET6) {
|
| 540 |
|
|
struct inet6_timewait_sock *tw6 =
|
| 541 |
|
|
inet6_twsk((struct sock *)tw);
|
| 542 |
|
|
entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32;
|
| 543 |
|
|
entry.daddr = tw6->tw_v6_daddr.s6_addr32;
|
| 544 |
|
|
} else
|
| 545 |
|
|
#endif
|
| 546 |
|
|
{
|
| 547 |
|
|
entry.saddr = &tw->tw_rcv_saddr;
|
| 548 |
|
|
entry.daddr = &tw->tw_daddr;
|
| 549 |
|
|
}
|
| 550 |
|
|
entry.sport = tw->tw_num;
|
| 551 |
|
|
entry.dport = ntohs(tw->tw_dport);
|
| 552 |
|
|
entry.userlocks = 0;
|
| 553 |
|
|
|
| 554 |
|
|
if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry))
|
| 555 |
|
|
return 0;
|
| 556 |
|
|
}
|
| 557 |
|
|
|
| 558 |
|
|
return inet_twsk_diag_fill(tw, skb, r->idiag_ext,
|
| 559 |
|
|
NETLINK_CB(cb->skb).pid,
|
| 560 |
|
|
cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
|
| 561 |
|
|
}
|
| 562 |
|
|
|
| 563 |
|
|
static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk,
|
| 564 |
|
|
struct request_sock *req, u32 pid, u32 seq,
|
| 565 |
|
|
const struct nlmsghdr *unlh)
|
| 566 |
|
|
{
|
| 567 |
|
|
const struct inet_request_sock *ireq = inet_rsk(req);
|
| 568 |
|
|
struct inet_sock *inet = inet_sk(sk);
|
| 569 |
|
|
unsigned char *b = skb_tail_pointer(skb);
|
| 570 |
|
|
struct inet_diag_msg *r;
|
| 571 |
|
|
struct nlmsghdr *nlh;
|
| 572 |
|
|
long tmo;
|
| 573 |
|
|
|
| 574 |
|
|
nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
|
| 575 |
|
|
nlh->nlmsg_flags = NLM_F_MULTI;
|
| 576 |
|
|
r = NLMSG_DATA(nlh);
|
| 577 |
|
|
|
| 578 |
|
|
r->idiag_family = sk->sk_family;
|
| 579 |
|
|
r->idiag_state = TCP_SYN_RECV;
|
| 580 |
|
|
r->idiag_timer = 1;
|
| 581 |
|
|
r->idiag_retrans = req->retrans;
|
| 582 |
|
|
|
| 583 |
|
|
r->id.idiag_if = sk->sk_bound_dev_if;
|
| 584 |
|
|
r->id.idiag_cookie[0] = (u32)(unsigned long)req;
|
| 585 |
|
|
r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1);
|
| 586 |
|
|
|
| 587 |
|
|
tmo = req->expires - jiffies;
|
| 588 |
|
|
if (tmo < 0)
|
| 589 |
|
|
tmo = 0;
|
| 590 |
|
|
|
| 591 |
|
|
r->id.idiag_sport = inet->sport;
|
| 592 |
|
|
r->id.idiag_dport = ireq->rmt_port;
|
| 593 |
|
|
r->id.idiag_src[0] = ireq->loc_addr;
|
| 594 |
|
|
r->id.idiag_dst[0] = ireq->rmt_addr;
|
| 595 |
|
|
r->idiag_expires = jiffies_to_msecs(tmo);
|
| 596 |
|
|
r->idiag_rqueue = 0;
|
| 597 |
|
|
r->idiag_wqueue = 0;
|
| 598 |
|
|
r->idiag_uid = sock_i_uid(sk);
|
| 599 |
|
|
r->idiag_inode = 0;
|
| 600 |
|
|
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
|
| 601 |
|
|
if (r->idiag_family == AF_INET6) {
|
| 602 |
|
|
ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
|
| 603 |
|
|
&inet6_rsk(req)->loc_addr);
|
| 604 |
|
|
ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
|
| 605 |
|
|
&inet6_rsk(req)->rmt_addr);
|
| 606 |
|
|
}
|
| 607 |
|
|
#endif
|
| 608 |
|
|
nlh->nlmsg_len = skb_tail_pointer(skb) - b;
|
| 609 |
|
|
|
| 610 |
|
|
return skb->len;
|
| 611 |
|
|
|
| 612 |
|
|
nlmsg_failure:
|
| 613 |
|
|
nlmsg_trim(skb, b);
|
| 614 |
|
|
return -1;
|
| 615 |
|
|
}
|
| 616 |
|
|
|
| 617 |
|
|
static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk,
|
| 618 |
|
|
struct netlink_callback *cb)
|
| 619 |
|
|
{
|
| 620 |
|
|
struct inet_diag_entry entry;
|
| 621 |
|
|
struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
|
| 622 |
|
|
struct inet_connection_sock *icsk = inet_csk(sk);
|
| 623 |
|
|
struct listen_sock *lopt;
|
| 624 |
|
|
struct rtattr *bc = NULL;
|
| 625 |
|
|
struct inet_sock *inet = inet_sk(sk);
|
| 626 |
|
|
int j, s_j;
|
| 627 |
|
|
int reqnum, s_reqnum;
|
| 628 |
|
|
int err = 0;
|
| 629 |
|
|
|
| 630 |
|
|
s_j = cb->args[3];
|
| 631 |
|
|
s_reqnum = cb->args[4];
|
| 632 |
|
|
|
| 633 |
|
|
if (s_j > 0)
|
| 634 |
|
|
s_j--;
|
| 635 |
|
|
|
| 636 |
|
|
entry.family = sk->sk_family;
|
| 637 |
|
|
|
| 638 |
|
|
read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
|
| 639 |
|
|
|
| 640 |
|
|
lopt = icsk->icsk_accept_queue.listen_opt;
|
| 641 |
|
|
if (!lopt || !lopt->qlen)
|
| 642 |
|
|
goto out;
|
| 643 |
|
|
|
| 644 |
|
|
if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
|
| 645 |
|
|
bc = (struct rtattr *)(r + 1);
|
| 646 |
|
|
entry.sport = inet->num;
|
| 647 |
|
|
entry.userlocks = sk->sk_userlocks;
|
| 648 |
|
|
}
|
| 649 |
|
|
|
| 650 |
|
|
for (j = s_j; j < lopt->nr_table_entries; j++) {
|
| 651 |
|
|
struct request_sock *req, *head = lopt->syn_table[j];
|
| 652 |
|
|
|
| 653 |
|
|
reqnum = 0;
|
| 654 |
|
|
for (req = head; req; reqnum++, req = req->dl_next) {
|
| 655 |
|
|
struct inet_request_sock *ireq = inet_rsk(req);
|
| 656 |
|
|
|
| 657 |
|
|
if (reqnum < s_reqnum)
|
| 658 |
|
|
continue;
|
| 659 |
|
|
if (r->id.idiag_dport != ireq->rmt_port &&
|
| 660 |
|
|
r->id.idiag_dport)
|
| 661 |
|
|
continue;
|
| 662 |
|
|
|
| 663 |
|
|
if (bc) {
|
| 664 |
|
|
entry.saddr =
|
| 665 |
|
|
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
|
| 666 |
|
|
(entry.family == AF_INET6) ?
|
| 667 |
|
|
inet6_rsk(req)->loc_addr.s6_addr32 :
|
| 668 |
|
|
#endif
|
| 669 |
|
|
&ireq->loc_addr;
|
| 670 |
|
|
entry.daddr =
|
| 671 |
|
|
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
|
| 672 |
|
|
(entry.family == AF_INET6) ?
|
| 673 |
|
|
inet6_rsk(req)->rmt_addr.s6_addr32 :
|
| 674 |
|
|
#endif
|
| 675 |
|
|
&ireq->rmt_addr;
|
| 676 |
|
|
entry.dport = ntohs(ireq->rmt_port);
|
| 677 |
|
|
|
| 678 |
|
|
if (!inet_diag_bc_run(RTA_DATA(bc),
|
| 679 |
|
|
RTA_PAYLOAD(bc), &entry))
|
| 680 |
|
|
continue;
|
| 681 |
|
|
}
|
| 682 |
|
|
|
| 683 |
|
|
err = inet_diag_fill_req(skb, sk, req,
|
| 684 |
|
|
NETLINK_CB(cb->skb).pid,
|
| 685 |
|
|
cb->nlh->nlmsg_seq, cb->nlh);
|
| 686 |
|
|
if (err < 0) {
|
| 687 |
|
|
cb->args[3] = j + 1;
|
| 688 |
|
|
cb->args[4] = reqnum;
|
| 689 |
|
|
goto out;
|
| 690 |
|
|
}
|
| 691 |
|
|
}
|
| 692 |
|
|
|
| 693 |
|
|
s_reqnum = 0;
|
| 694 |
|
|
}
|
| 695 |
|
|
|
| 696 |
|
|
out:
|
| 697 |
|
|
read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
|
| 698 |
|
|
|
| 699 |
|
|
return err;
|
| 700 |
|
|
}
|
| 701 |
|
|
|
| 702 |
|
|
static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
|
| 703 |
|
|
{
|
| 704 |
|
|
int i, num;
|
| 705 |
|
|
int s_i, s_num;
|
| 706 |
|
|
struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
|
| 707 |
|
|
const struct inet_diag_handler *handler;
|
| 708 |
|
|
struct inet_hashinfo *hashinfo;
|
| 709 |
|
|
|
| 710 |
|
|
handler = inet_diag_lock_handler(cb->nlh->nlmsg_type);
|
| 711 |
|
|
if (!handler)
|
| 712 |
|
|
goto no_handler;
|
| 713 |
|
|
|
| 714 |
|
|
hashinfo = handler->idiag_hashinfo;
|
| 715 |
|
|
|
| 716 |
|
|
s_i = cb->args[1];
|
| 717 |
|
|
s_num = num = cb->args[2];
|
| 718 |
|
|
|
| 719 |
|
|
if (cb->args[0] == 0) {
|
| 720 |
|
|
if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV)))
|
| 721 |
|
|
goto skip_listen_ht;
|
| 722 |
|
|
|
| 723 |
|
|
inet_listen_lock(hashinfo);
|
| 724 |
|
|
for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
|
| 725 |
|
|
struct sock *sk;
|
| 726 |
|
|
struct hlist_node *node;
|
| 727 |
|
|
|
| 728 |
|
|
num = 0;
|
| 729 |
|
|
sk_for_each(sk, node, &hashinfo->listening_hash[i]) {
|
| 730 |
|
|
struct inet_sock *inet = inet_sk(sk);
|
| 731 |
|
|
|
| 732 |
|
|
if (num < s_num) {
|
| 733 |
|
|
num++;
|
| 734 |
|
|
continue;
|
| 735 |
|
|
}
|
| 736 |
|
|
|
| 737 |
|
|
if (r->id.idiag_sport != inet->sport &&
|
| 738 |
|
|
r->id.idiag_sport)
|
| 739 |
|
|
goto next_listen;
|
| 740 |
|
|
|
| 741 |
|
|
if (!(r->idiag_states & TCPF_LISTEN) ||
|
| 742 |
|
|
r->id.idiag_dport ||
|
| 743 |
|
|
cb->args[3] > 0)
|
| 744 |
|
|
goto syn_recv;
|
| 745 |
|
|
|
| 746 |
|
|
if (inet_csk_diag_dump(sk, skb, cb) < 0) {
|
| 747 |
|
|
inet_listen_unlock(hashinfo);
|
| 748 |
|
|
goto done;
|
| 749 |
|
|
}
|
| 750 |
|
|
|
| 751 |
|
|
syn_recv:
|
| 752 |
|
|
if (!(r->idiag_states & TCPF_SYN_RECV))
|
| 753 |
|
|
goto next_listen;
|
| 754 |
|
|
|
| 755 |
|
|
if (inet_diag_dump_reqs(skb, sk, cb) < 0) {
|
| 756 |
|
|
inet_listen_unlock(hashinfo);
|
| 757 |
|
|
goto done;
|
| 758 |
|
|
}
|
| 759 |
|
|
|
| 760 |
|
|
next_listen:
|
| 761 |
|
|
cb->args[3] = 0;
|
| 762 |
|
|
cb->args[4] = 0;
|
| 763 |
|
|
++num;
|
| 764 |
|
|
}
|
| 765 |
|
|
|
| 766 |
|
|
s_num = 0;
|
| 767 |
|
|
cb->args[3] = 0;
|
| 768 |
|
|
cb->args[4] = 0;
|
| 769 |
|
|
}
|
| 770 |
|
|
inet_listen_unlock(hashinfo);
|
| 771 |
|
|
skip_listen_ht:
|
| 772 |
|
|
cb->args[0] = 1;
|
| 773 |
|
|
s_i = num = s_num = 0;
|
| 774 |
|
|
}
|
| 775 |
|
|
|
| 776 |
|
|
if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV)))
|
| 777 |
|
|
goto unlock;
|
| 778 |
|
|
|
| 779 |
|
|
for (i = s_i; i < hashinfo->ehash_size; i++) {
|
| 780 |
|
|
struct inet_ehash_bucket *head = &hashinfo->ehash[i];
|
| 781 |
|
|
rwlock_t *lock = inet_ehash_lockp(hashinfo, i);
|
| 782 |
|
|
struct sock *sk;
|
| 783 |
|
|
struct hlist_node *node;
|
| 784 |
|
|
|
| 785 |
|
|
if (i > s_i)
|
| 786 |
|
|
s_num = 0;
|
| 787 |
|
|
|
| 788 |
|
|
read_lock_bh(lock);
|
| 789 |
|
|
num = 0;
|
| 790 |
|
|
sk_for_each(sk, node, &head->chain) {
|
| 791 |
|
|
struct inet_sock *inet = inet_sk(sk);
|
| 792 |
|
|
|
| 793 |
|
|
if (num < s_num)
|
| 794 |
|
|
goto next_normal;
|
| 795 |
|
|
if (!(r->idiag_states & (1 << sk->sk_state)))
|
| 796 |
|
|
goto next_normal;
|
| 797 |
|
|
if (r->id.idiag_sport != inet->sport &&
|
| 798 |
|
|
r->id.idiag_sport)
|
| 799 |
|
|
goto next_normal;
|
| 800 |
|
|
if (r->id.idiag_dport != inet->dport &&
|
| 801 |
|
|
r->id.idiag_dport)
|
| 802 |
|
|
goto next_normal;
|
| 803 |
|
|
if (inet_csk_diag_dump(sk, skb, cb) < 0) {
|
| 804 |
|
|
read_unlock_bh(lock);
|
| 805 |
|
|
goto done;
|
| 806 |
|
|
}
|
| 807 |
|
|
next_normal:
|
| 808 |
|
|
++num;
|
| 809 |
|
|
}
|
| 810 |
|
|
|
| 811 |
|
|
if (r->idiag_states & TCPF_TIME_WAIT) {
|
| 812 |
|
|
struct inet_timewait_sock *tw;
|
| 813 |
|
|
|
| 814 |
|
|
inet_twsk_for_each(tw, node,
|
| 815 |
|
|
&head->twchain) {
|
| 816 |
|
|
|
| 817 |
|
|
if (num < s_num)
|
| 818 |
|
|
goto next_dying;
|
| 819 |
|
|
if (r->id.idiag_sport != tw->tw_sport &&
|
| 820 |
|
|
r->id.idiag_sport)
|
| 821 |
|
|
goto next_dying;
|
| 822 |
|
|
if (r->id.idiag_dport != tw->tw_dport &&
|
| 823 |
|
|
r->id.idiag_dport)
|
| 824 |
|
|
goto next_dying;
|
| 825 |
|
|
if (inet_twsk_diag_dump(tw, skb, cb) < 0) {
|
| 826 |
|
|
read_unlock_bh(lock);
|
| 827 |
|
|
goto done;
|
| 828 |
|
|
}
|
| 829 |
|
|
next_dying:
|
| 830 |
|
|
++num;
|
| 831 |
|
|
}
|
| 832 |
|
|
}
|
| 833 |
|
|
read_unlock_bh(lock);
|
| 834 |
|
|
}
|
| 835 |
|
|
|
| 836 |
|
|
done:
|
| 837 |
|
|
cb->args[1] = i;
|
| 838 |
|
|
cb->args[2] = num;
|
| 839 |
|
|
unlock:
|
| 840 |
|
|
inet_diag_unlock_handler(handler);
|
| 841 |
|
|
no_handler:
|
| 842 |
|
|
return skb->len;
|
| 843 |
|
|
}
|
| 844 |
|
|
|
| 845 |
|
|
static int inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
|
| 846 |
|
|
{
|
| 847 |
|
|
int hdrlen = sizeof(struct inet_diag_req);
|
| 848 |
|
|
|
| 849 |
|
|
if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX ||
|
| 850 |
|
|
nlmsg_len(nlh) < hdrlen)
|
| 851 |
|
|
return -EINVAL;
|
| 852 |
|
|
|
| 853 |
|
|
if (nlh->nlmsg_flags & NLM_F_DUMP) {
|
| 854 |
|
|
if (nlmsg_attrlen(nlh, hdrlen)) {
|
| 855 |
|
|
struct nlattr *attr;
|
| 856 |
|
|
|
| 857 |
|
|
attr = nlmsg_find_attr(nlh, hdrlen,
|
| 858 |
|
|
INET_DIAG_REQ_BYTECODE);
|
| 859 |
|
|
if (attr == NULL ||
|
| 860 |
|
|
nla_len(attr) < sizeof(struct inet_diag_bc_op) ||
|
| 861 |
|
|
inet_diag_bc_audit(nla_data(attr), nla_len(attr)))
|
| 862 |
|
|
return -EINVAL;
|
| 863 |
|
|
}
|
| 864 |
|
|
|
| 865 |
|
|
return netlink_dump_start(idiagnl, skb, nlh,
|
| 866 |
|
|
inet_diag_dump, NULL);
|
| 867 |
|
|
}
|
| 868 |
|
|
|
| 869 |
|
|
return inet_diag_get_exact(skb, nlh);
|
| 870 |
|
|
}
|
| 871 |
|
|
|
| 872 |
|
|
static DEFINE_MUTEX(inet_diag_mutex);
|
| 873 |
|
|
|
| 874 |
|
|
static void inet_diag_rcv(struct sk_buff *skb)
|
| 875 |
|
|
{
|
| 876 |
|
|
mutex_lock(&inet_diag_mutex);
|
| 877 |
|
|
netlink_rcv_skb(skb, &inet_diag_rcv_msg);
|
| 878 |
|
|
mutex_unlock(&inet_diag_mutex);
|
| 879 |
|
|
}
|
| 880 |
|
|
|
| 881 |
|
|
int inet_diag_register(const struct inet_diag_handler *h)
|
| 882 |
|
|
{
|
| 883 |
|
|
const __u16 type = h->idiag_type;
|
| 884 |
|
|
int err = -EINVAL;
|
| 885 |
|
|
|
| 886 |
|
|
if (type >= INET_DIAG_GETSOCK_MAX)
|
| 887 |
|
|
goto out;
|
| 888 |
|
|
|
| 889 |
|
|
mutex_lock(&inet_diag_table_mutex);
|
| 890 |
|
|
err = -EEXIST;
|
| 891 |
|
|
if (inet_diag_table[type] == NULL) {
|
| 892 |
|
|
inet_diag_table[type] = h;
|
| 893 |
|
|
err = 0;
|
| 894 |
|
|
}
|
| 895 |
|
|
mutex_unlock(&inet_diag_table_mutex);
|
| 896 |
|
|
out:
|
| 897 |
|
|
return err;
|
| 898 |
|
|
}
|
| 899 |
|
|
EXPORT_SYMBOL_GPL(inet_diag_register);
|
| 900 |
|
|
|
| 901 |
|
|
void inet_diag_unregister(const struct inet_diag_handler *h)
|
| 902 |
|
|
{
|
| 903 |
|
|
const __u16 type = h->idiag_type;
|
| 904 |
|
|
|
| 905 |
|
|
if (type >= INET_DIAG_GETSOCK_MAX)
|
| 906 |
|
|
return;
|
| 907 |
|
|
|
| 908 |
|
|
mutex_lock(&inet_diag_table_mutex);
|
| 909 |
|
|
inet_diag_table[type] = NULL;
|
| 910 |
|
|
mutex_unlock(&inet_diag_table_mutex);
|
| 911 |
|
|
}
|
| 912 |
|
|
EXPORT_SYMBOL_GPL(inet_diag_unregister);
|
| 913 |
|
|
|
| 914 |
|
|
static int __init inet_diag_init(void)
|
| 915 |
|
|
{
|
| 916 |
|
|
const int inet_diag_table_size = (INET_DIAG_GETSOCK_MAX *
|
| 917 |
|
|
sizeof(struct inet_diag_handler *));
|
| 918 |
|
|
int err = -ENOMEM;
|
| 919 |
|
|
|
| 920 |
|
|
inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL);
|
| 921 |
|
|
if (!inet_diag_table)
|
| 922 |
|
|
goto out;
|
| 923 |
|
|
|
| 924 |
|
|
idiagnl = netlink_kernel_create(&init_net, NETLINK_INET_DIAG, 0,
|
| 925 |
|
|
inet_diag_rcv, NULL, THIS_MODULE);
|
| 926 |
|
|
if (idiagnl == NULL)
|
| 927 |
|
|
goto out_free_table;
|
| 928 |
|
|
err = 0;
|
| 929 |
|
|
out:
|
| 930 |
|
|
return err;
|
| 931 |
|
|
out_free_table:
|
| 932 |
|
|
kfree(inet_diag_table);
|
| 933 |
|
|
goto out;
|
| 934 |
|
|
}
|
| 935 |
|
|
|
| 936 |
|
|
static void __exit inet_diag_exit(void)
|
| 937 |
|
|
{
|
| 938 |
|
|
sock_release(idiagnl->sk_socket);
|
| 939 |
|
|
kfree(inet_diag_table);
|
| 940 |
|
|
}
|
| 941 |
|
|
|
| 942 |
|
|
module_init(inet_diag_init);
|
| 943 |
|
|
module_exit(inet_diag_exit);
|
| 944 |
|
|
MODULE_LICENSE("GPL");
|
| 945 |
|
|
MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_INET_DIAG);
|
