--- /dev/null
+#ifndef _INET_DIAG_H_
+#define _INET_DIAG_H_ 1
+
+/* Just some random number */
+#define TCPDIAG_GETSOCK 18
+#define DCCPDIAG_GETSOCK 19
+
+#define INET_DIAG_GETSOCK_MAX 24
+
+/* Socket identity */
+struct inet_diag_sockid {
+ __u16 idiag_sport;
+ __u16 idiag_dport;
+ __u32 idiag_src[4];
+ __u32 idiag_dst[4];
+ __u32 idiag_if;
+ __u32 idiag_cookie[2];
+#define INET_DIAG_NOCOOKIE (~0U)
+};
+
+/* Request structure */
+
+struct inet_diag_req {
+ __u8 idiag_family; /* Family of addresses. */
+ __u8 idiag_src_len;
+ __u8 idiag_dst_len;
+ __u8 idiag_ext; /* Query extended information */
+
+ struct inet_diag_sockid id;
+
+ __u32 idiag_states; /* States to dump */
+ __u32 idiag_dbs; /* Tables to dump (NI) */
+};
+
+enum {
+ INET_DIAG_REQ_NONE,
+ INET_DIAG_REQ_BYTECODE,
+};
+
+#define INET_DIAG_REQ_MAX INET_DIAG_REQ_BYTECODE
+
+/* Bytecode is sequence of 4 byte commands followed by variable arguments.
+ * All the commands identified by "code" are conditional jumps forward:
+ * to offset cc+"yes" or to offset cc+"no". "yes" is supposed to be
+ * length of the command and its arguments.
+ */
+
+struct inet_diag_bc_op {
+ unsigned char code;
+ unsigned char yes;
+ unsigned short no;
+};
+
+enum {
+ INET_DIAG_BC_NOP,
+ INET_DIAG_BC_JMP,
+ INET_DIAG_BC_S_GE,
+ INET_DIAG_BC_S_LE,
+ INET_DIAG_BC_D_GE,
+ INET_DIAG_BC_D_LE,
+ INET_DIAG_BC_AUTO,
+ INET_DIAG_BC_S_COND,
+ INET_DIAG_BC_D_COND,
+};
+
+struct inet_diag_hostcond {
+ __u8 family;
+ __u8 prefix_len;
+ int port;
+ __u32 addr[0];
+};
+
+/* Base info structure. It contains socket identity (addrs/ports/cookie)
+ * and, alas, the information shown by netstat. */
+struct inet_diag_msg {
+ __u8 idiag_family;
+ __u8 idiag_state;
+ __u8 idiag_timer;
+ __u8 idiag_retrans;
+
+ struct inet_diag_sockid id;
+
+ __u32 idiag_expires;
+ __u32 idiag_rqueue;
+ __u32 idiag_wqueue;
+ __u32 idiag_uid;
+ __u32 idiag_inode;
+};
+
+/* Extensions */
+
+enum {
+ INET_DIAG_NONE,
+ INET_DIAG_MEMINFO,
+ INET_DIAG_INFO,
+ INET_DIAG_VEGASINFO,
+ INET_DIAG_CONG,
+};
+
+#define INET_DIAG_MAX INET_DIAG_CONG
+
+
+/* INET_DIAG_MEM */
+
+struct inet_diag_meminfo {
+ __u32 idiag_rmem;
+ __u32 idiag_wmem;
+ __u32 idiag_fmem;
+ __u32 idiag_tmem;
+};
+
+/* INET_DIAG_VEGASINFO */
+
+struct tcpvegas_info {
+ __u32 tcpv_enabled;
+ __u32 tcpv_rttcnt;
+ __u32 tcpv_rtt;
+ __u32 tcpv_minrtt;
+};
+
+#ifdef __KERNEL__
+struct sock;
+struct inet_hashinfo;
+
+struct inet_diag_handler {
+ struct inet_hashinfo *idiag_hashinfo;
+ void (*idiag_get_info)(struct sock *sk,
+ struct inet_diag_msg *r,
+ void *info);
+ __u16 idiag_info_size;
+ __u16 idiag_type;
+};
+
+extern int inet_diag_register(const struct inet_diag_handler *handler);
+extern void inet_diag_unregister(const struct inet_diag_handler *handler);
+#endif /* __KERNEL__ */
+
+#endif /* _INET_DIAG_H_ */
+++ /dev/null
-#ifndef _INET_DIAG_H_
-#define _INET_DIAG_H_ 1
-
-/* Just some random number */
-#define TCPDIAG_GETSOCK 18
-#define DCCPDIAG_GETSOCK 19
-
-#define INET_DIAG_GETSOCK_MAX 24
-
-/* Socket identity */
-struct inet_diag_sockid {
- __u16 idiag_sport;
- __u16 idiag_dport;
- __u32 idiag_src[4];
- __u32 idiag_dst[4];
- __u32 idiag_if;
- __u32 idiag_cookie[2];
-#define INET_DIAG_NOCOOKIE (~0U)
-};
-
-/* Request structure */
-
-struct inet_diag_req {
- __u8 idiag_family; /* Family of addresses. */
- __u8 idiag_src_len;
- __u8 idiag_dst_len;
- __u8 idiag_ext; /* Query extended information */
-
- struct inet_diag_sockid id;
-
- __u32 idiag_states; /* States to dump */
- __u32 idiag_dbs; /* Tables to dump (NI) */
-};
-
-enum {
- INET_DIAG_REQ_NONE,
- INET_DIAG_REQ_BYTECODE,
-};
-
-#define INET_DIAG_REQ_MAX INET_DIAG_REQ_BYTECODE
-
-/* Bytecode is sequence of 4 byte commands followed by variable arguments.
- * All the commands identified by "code" are conditional jumps forward:
- * to offset cc+"yes" or to offset cc+"no". "yes" is supposed to be
- * length of the command and its arguments.
- */
-
-struct inet_diag_bc_op {
- unsigned char code;
- unsigned char yes;
- unsigned short no;
-};
-
-enum {
- INET_DIAG_BC_NOP,
- INET_DIAG_BC_JMP,
- INET_DIAG_BC_S_GE,
- INET_DIAG_BC_S_LE,
- INET_DIAG_BC_D_GE,
- INET_DIAG_BC_D_LE,
- INET_DIAG_BC_AUTO,
- INET_DIAG_BC_S_COND,
- INET_DIAG_BC_D_COND,
-};
-
-struct inet_diag_hostcond {
- __u8 family;
- __u8 prefix_len;
- int port;
- __u32 addr[0];
-};
-
-/* Base info structure. It contains socket identity (addrs/ports/cookie)
- * and, alas, the information shown by netstat. */
-struct inet_diag_msg {
- __u8 idiag_family;
- __u8 idiag_state;
- __u8 idiag_timer;
- __u8 idiag_retrans;
-
- struct inet_diag_sockid id;
-
- __u32 idiag_expires;
- __u32 idiag_rqueue;
- __u32 idiag_wqueue;
- __u32 idiag_uid;
- __u32 idiag_inode;
-};
-
-/* Extensions */
-
-enum {
- INET_DIAG_NONE,
- INET_DIAG_MEMINFO,
- INET_DIAG_INFO,
- INET_DIAG_VEGASINFO,
- INET_DIAG_CONG,
-};
-
-#define INET_DIAG_MAX INET_DIAG_CONG
-
-
-/* INET_DIAG_MEM */
-
-struct inet_diag_meminfo {
- __u32 idiag_rmem;
- __u32 idiag_wmem;
- __u32 idiag_fmem;
- __u32 idiag_tmem;
-};
-
-/* INET_DIAG_VEGASINFO */
-
-struct tcpvegas_info {
- __u32 tcpv_enabled;
- __u32 tcpv_rttcnt;
- __u32 tcpv_rtt;
- __u32 tcpv_minrtt;
-};
-
-#ifdef __KERNEL__
-struct sock;
-struct inet_hashinfo;
-
-struct inet_diag_handler {
- struct inet_hashinfo *idiag_hashinfo;
- void (*idiag_get_info)(struct sock *sk,
- struct inet_diag_msg *r,
- void *info);
- __u16 idiag_info_size;
- __u16 idiag_type;
-};
-
-extern int inet_diag_register(const struct inet_diag_handler *handler);
-extern void inet_diag_unregister(const struct inet_diag_handler *handler);
-#endif /* __KERNEL__ */
-
-#endif /* _INET_DIAG_H_ */
#include <linux/config.h>
#include <linux/module.h>
-#include <linux/tcp_diag.h>
+#include <linux/inet_diag.h>
#include "dccp.h"
obj-$(CONFIG_IP_ROUTE_MULTIPATH_DRR) += multipath_drr.o
obj-$(CONFIG_NETFILTER) += netfilter/
obj-$(CONFIG_IP_VS) += ipvs/
-obj-$(CONFIG_IP_INET_DIAG) += tcp_diag.o
+obj-$(CONFIG_IP_INET_DIAG) += inet_diag.o
obj-$(CONFIG_IP_ROUTE_MULTIPATH_CACHED) += multipath.o
obj-$(CONFIG_TCP_CONG_BIC) += tcp_bic.o
obj-$(CONFIG_TCP_CONG_WESTWOOD) += tcp_westwood.o
--- /dev/null
+/*
+ * inet_diag.c Module for monitoring INET transport protocols sockets.
+ *
+ * Version: $Id: inet_diag.c,v 1.3 2002/02/01 22:01:04 davem Exp $
+ *
+ * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ *
+ * 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.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/random.h>
+#include <linux/cache.h>
+#include <linux/init.h>
+#include <linux/time.h>
+
+#include <net/icmp.h>
+#include <net/tcp.h>
+#include <net/ipv6.h>
+#include <net/inet_common.h>
+#include <net/inet_connection_sock.h>
+#include <net/inet_hashtables.h>
+#include <net/inet_timewait_sock.h>
+#include <net/inet6_hashtables.h>
+
+#include <linux/inet.h>
+#include <linux/stddef.h>
+
+#include <linux/inet_diag.h>
+
+static const struct inet_diag_handler **inet_diag_table;
+
+struct inet_diag_entry {
+ u32 *saddr;
+ u32 *daddr;
+ u16 sport;
+ u16 dport;
+ u16 family;
+ u16 userlocks;
+};
+
+static struct sock *idiagnl;
+
+#define INET_DIAG_PUT(skb, attrtype, attrlen) \
+ RTA_DATA(__RTA_PUT(skb, attrtype, attrlen))
+
+static int inet_diag_fill(struct sk_buff *skb, struct sock *sk,
+ int ext, u32 pid, u32 seq, u16 nlmsg_flags,
+ const struct nlmsghdr *unlh)
+{
+ const struct inet_sock *inet = inet_sk(sk);
+ const struct inet_connection_sock *icsk = inet_csk(sk);
+ struct inet_diag_msg *r;
+ struct nlmsghdr *nlh;
+ void *info = NULL;
+ struct inet_diag_meminfo *minfo = NULL;
+ unsigned char *b = skb->tail;
+ const struct inet_diag_handler *handler;
+
+ handler = inet_diag_table[unlh->nlmsg_type];
+ BUG_ON(handler == NULL);
+
+ nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
+ nlh->nlmsg_flags = nlmsg_flags;
+
+ r = NLMSG_DATA(nlh);
+ if (sk->sk_state != TCP_TIME_WAIT) {
+ if (ext & (1 << (INET_DIAG_MEMINFO - 1)))
+ minfo = INET_DIAG_PUT(skb, INET_DIAG_MEMINFO,
+ sizeof(*minfo));
+ if (ext & (1 << (INET_DIAG_INFO - 1)))
+ info = INET_DIAG_PUT(skb, INET_DIAG_INFO,
+ handler->idiag_info_size);
+
+ if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) {
+ size_t len = strlen(icsk->icsk_ca_ops->name);
+ strcpy(INET_DIAG_PUT(skb, INET_DIAG_CONG, len + 1),
+ icsk->icsk_ca_ops->name);
+ }
+ }
+ r->idiag_family = sk->sk_family;
+ r->idiag_state = sk->sk_state;
+ r->idiag_timer = 0;
+ r->idiag_retrans = 0;
+
+ r->id.idiag_if = sk->sk_bound_dev_if;
+ r->id.idiag_cookie[0] = (u32)(unsigned long)sk;
+ r->id.idiag_cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1);
+
+ if (r->idiag_state == TCP_TIME_WAIT) {
+ const struct inet_timewait_sock *tw = inet_twsk(sk);
+ long tmo = tw->tw_ttd - jiffies;
+ if (tmo < 0)
+ tmo = 0;
+
+ r->id.idiag_sport = tw->tw_sport;
+ r->id.idiag_dport = tw->tw_dport;
+ r->id.idiag_src[0] = tw->tw_rcv_saddr;
+ r->id.idiag_dst[0] = tw->tw_daddr;
+ r->idiag_state = tw->tw_substate;
+ r->idiag_timer = 3;
+ r->idiag_expires = (tmo * 1000 + HZ - 1) / HZ;
+ r->idiag_rqueue = 0;
+ r->idiag_wqueue = 0;
+ r->idiag_uid = 0;
+ r->idiag_inode = 0;
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
+ if (r->idiag_family == AF_INET6) {
+ const struct tcp6_timewait_sock *tcp6tw = tcp6_twsk(sk);
+
+ ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
+ &tcp6tw->tw_v6_rcv_saddr);
+ ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
+ &tcp6tw->tw_v6_daddr);
+ }
+#endif
+ nlh->nlmsg_len = skb->tail - b;
+ return skb->len;
+ }
+
+ r->id.idiag_sport = inet->sport;
+ r->id.idiag_dport = inet->dport;
+ r->id.idiag_src[0] = inet->rcv_saddr;
+ r->id.idiag_dst[0] = inet->daddr;
+
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
+ if (r->idiag_family == AF_INET6) {
+ struct ipv6_pinfo *np = inet6_sk(sk);
+
+ ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
+ &np->rcv_saddr);
+ ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
+ &np->daddr);
+ }
+#endif
+
+#define EXPIRES_IN_MS(tmo) ((tmo - jiffies) * 1000 + HZ - 1) / HZ
+
+ if (icsk->icsk_pending == ICSK_TIME_RETRANS) {
+ r->idiag_timer = 1;
+ r->idiag_retrans = icsk->icsk_retransmits;
+ r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
+ } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
+ r->idiag_timer = 4;
+ r->idiag_retrans = icsk->icsk_probes_out;
+ r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
+ } else if (timer_pending(&sk->sk_timer)) {
+ r->idiag_timer = 2;
+ r->idiag_retrans = icsk->icsk_probes_out;
+ r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
+ } else {
+ r->idiag_timer = 0;
+ r->idiag_expires = 0;
+ }
+#undef EXPIRES_IN_MS
+
+ r->idiag_uid = sock_i_uid(sk);
+ r->idiag_inode = sock_i_ino(sk);
+
+ if (minfo) {
+ minfo->idiag_rmem = atomic_read(&sk->sk_rmem_alloc);
+ minfo->idiag_wmem = sk->sk_wmem_queued;
+ minfo->idiag_fmem = sk->sk_forward_alloc;
+ minfo->idiag_tmem = atomic_read(&sk->sk_wmem_alloc);
+ }
+
+ handler->idiag_get_info(sk, r, info);
+
+ if (sk->sk_state < TCP_TIME_WAIT &&
+ icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info)
+ icsk->icsk_ca_ops->get_info(sk, ext, skb);
+
+ nlh->nlmsg_len = skb->tail - b;
+ return skb->len;
+
+rtattr_failure:
+nlmsg_failure:
+ skb_trim(skb, b - skb->data);
+ return -1;
+}
+
+static int inet_diag_get_exact(struct sk_buff *in_skb, const struct nlmsghdr *nlh)
+{
+ int err;
+ struct sock *sk;
+ struct inet_diag_req *req = NLMSG_DATA(nlh);
+ struct sk_buff *rep;
+ struct inet_hashinfo *hashinfo;
+ const struct inet_diag_handler *handler;
+
+ handler = inet_diag_table[nlh->nlmsg_type];
+ BUG_ON(handler == NULL);
+ hashinfo = handler->idiag_hashinfo;
+
+ if (req->idiag_family == AF_INET) {
+ sk = inet_lookup(hashinfo, req->id.idiag_dst[0],
+ req->id.idiag_dport, req->id.idiag_src[0],
+ req->id.idiag_sport, req->id.idiag_if);
+ }
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
+ else if (req->idiag_family == AF_INET6) {
+ sk = inet6_lookup(hashinfo,
+ (struct in6_addr *)req->id.idiag_dst,
+ req->id.idiag_dport,
+ (struct in6_addr *)req->id.idiag_src,
+ req->id.idiag_sport,
+ req->id.idiag_if);
+ }
+#endif
+ else {
+ return -EINVAL;
+ }
+
+ if (sk == NULL)
+ return -ENOENT;
+
+ err = -ESTALE;
+ if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE ||
+ req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) &&
+ ((u32)(unsigned long)sk != req->id.idiag_cookie[0] ||
+ (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1]))
+ goto out;
+
+ err = -ENOMEM;
+ rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) +
+ sizeof(struct inet_diag_meminfo) +
+ handler->idiag_info_size + 64)),
+ GFP_KERNEL);
+ if (!rep)
+ goto out;
+
+ if (inet_diag_fill(rep, sk, req->idiag_ext,
+ NETLINK_CB(in_skb).pid,
+ nlh->nlmsg_seq, 0, nlh) <= 0)
+ BUG();
+
+ err = netlink_unicast(idiagnl, rep, NETLINK_CB(in_skb).pid,
+ MSG_DONTWAIT);
+ if (err > 0)
+ err = 0;
+
+out:
+ if (sk) {
+ if (sk->sk_state == TCP_TIME_WAIT)
+ inet_twsk_put((struct inet_timewait_sock *)sk);
+ else
+ sock_put(sk);
+ }
+ return err;
+}
+
+static int bitstring_match(const u32 *a1, const u32 *a2, int bits)
+{
+ int words = bits >> 5;
+
+ bits &= 0x1f;
+
+ if (words) {
+ if (memcmp(a1, a2, words << 2))
+ return 0;
+ }
+ if (bits) {
+ __u32 w1, w2;
+ __u32 mask;
+
+ w1 = a1[words];
+ w2 = a2[words];
+
+ mask = htonl((0xffffffff) << (32 - bits));
+
+ if ((w1 ^ w2) & mask)
+ return 0;
+ }
+
+ return 1;
+}
+
+
+static int inet_diag_bc_run(const void *bc, int len,
+ const struct inet_diag_entry *entry)
+{
+ while (len > 0) {
+ int yes = 1;
+ const struct inet_diag_bc_op *op = bc;
+
+ switch (op->code) {
+ case INET_DIAG_BC_NOP:
+ break;
+ case INET_DIAG_BC_JMP:
+ yes = 0;
+ break;
+ case INET_DIAG_BC_S_GE:
+ yes = entry->sport >= op[1].no;
+ break;
+ case INET_DIAG_BC_S_LE:
+ yes = entry->dport <= op[1].no;
+ break;
+ case INET_DIAG_BC_D_GE:
+ yes = entry->dport >= op[1].no;
+ break;
+ case INET_DIAG_BC_D_LE:
+ yes = entry->dport <= op[1].no;
+ break;
+ case INET_DIAG_BC_AUTO:
+ yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
+ break;
+ case INET_DIAG_BC_S_COND:
+ case INET_DIAG_BC_D_COND: {
+ struct inet_diag_hostcond *cond;
+ u32 *addr;
+
+ cond = (struct inet_diag_hostcond *)(op + 1);
+ if (cond->port != -1 &&
+ cond->port != (op->code == INET_DIAG_BC_S_COND ?
+ entry->sport : entry->dport)) {
+ yes = 0;
+ break;
+ }
+
+ if (cond->prefix_len == 0)
+ break;
+
+ if (op->code == INET_DIAG_BC_S_COND)
+ addr = entry->saddr;
+ else
+ addr = entry->daddr;
+
+ if (bitstring_match(addr, cond->addr, cond->prefix_len))
+ break;
+ if (entry->family == AF_INET6 &&
+ cond->family == AF_INET) {
+ if (addr[0] == 0 && addr[1] == 0 &&
+ addr[2] == htonl(0xffff) &&
+ bitstring_match(addr + 3, cond->addr,
+ cond->prefix_len))
+ break;
+ }
+ yes = 0;
+ break;
+ }
+ }
+
+ if (yes) {
+ len -= op->yes;
+ bc += op->yes;
+ } else {
+ len -= op->no;
+ bc += op->no;
+ }
+ }
+ return (len == 0);
+}
+
+static int valid_cc(const void *bc, int len, int cc)
+{
+ while (len >= 0) {
+ const struct inet_diag_bc_op *op = bc;
+
+ if (cc > len)
+ return 0;
+ if (cc == len)
+ return 1;
+ if (op->yes < 4)
+ return 0;
+ len -= op->yes;
+ bc += op->yes;
+ }
+ return 0;
+}
+
+static int inet_diag_bc_audit(const void *bytecode, int bytecode_len)
+{
+ const unsigned char *bc = bytecode;
+ int len = bytecode_len;
+
+ while (len > 0) {
+ struct inet_diag_bc_op *op = (struct inet_diag_bc_op *)bc;
+
+//printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len);
+ switch (op->code) {
+ case INET_DIAG_BC_AUTO:
+ case INET_DIAG_BC_S_COND:
+ case INET_DIAG_BC_D_COND:
+ case INET_DIAG_BC_S_GE:
+ case INET_DIAG_BC_S_LE:
+ case INET_DIAG_BC_D_GE:
+ case INET_DIAG_BC_D_LE:
+ if (op->yes < 4 || op->yes > len + 4)
+ return -EINVAL;
+ case INET_DIAG_BC_JMP:
+ if (op->no < 4 || op->no > len + 4)
+ return -EINVAL;
+ if (op->no < len &&
+ !valid_cc(bytecode, bytecode_len, len - op->no))
+ return -EINVAL;
+ break;
+ case INET_DIAG_BC_NOP:
+ if (op->yes < 4 || op->yes > len + 4)
+ return -EINVAL;
+ break;
+ default:
+ return -EINVAL;
+ }
+ bc += op->yes;
+ len -= op->yes;
+ }
+ return len == 0 ? 0 : -EINVAL;
+}
+
+static int inet_diag_dump_sock(struct sk_buff *skb, struct sock *sk,
+ struct netlink_callback *cb)
+{
+ struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
+
+ if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
+ struct inet_diag_entry entry;
+ struct rtattr *bc = (struct rtattr *)(r + 1);
+ struct inet_sock *inet = inet_sk(sk);
+
+ entry.family = sk->sk_family;
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
+ if (entry.family == AF_INET6) {
+ struct ipv6_pinfo *np = inet6_sk(sk);
+
+ entry.saddr = np->rcv_saddr.s6_addr32;
+ entry.daddr = np->daddr.s6_addr32;
+ } else
+#endif
+ {
+ entry.saddr = &inet->rcv_saddr;
+ entry.daddr = &inet->daddr;
+ }
+ entry.sport = inet->num;
+ entry.dport = ntohs(inet->dport);
+ entry.userlocks = sk->sk_userlocks;
+
+ if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry))
+ return 0;
+ }
+
+ return inet_diag_fill(skb, sk, r->idiag_ext, NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
+}
+
+static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk,
+ struct request_sock *req,
+ u32 pid, u32 seq,
+ const struct nlmsghdr *unlh)
+{
+ const struct inet_request_sock *ireq = inet_rsk(req);
+ struct inet_sock *inet = inet_sk(sk);
+ unsigned char *b = skb->tail;
+ struct inet_diag_msg *r;
+ struct nlmsghdr *nlh;
+ long tmo;
+
+ nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
+ nlh->nlmsg_flags = NLM_F_MULTI;
+ r = NLMSG_DATA(nlh);
+
+ r->idiag_family = sk->sk_family;
+ r->idiag_state = TCP_SYN_RECV;
+ r->idiag_timer = 1;
+ r->idiag_retrans = req->retrans;
+
+ r->id.idiag_if = sk->sk_bound_dev_if;
+ r->id.idiag_cookie[0] = (u32)(unsigned long)req;
+ r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1);
+
+ tmo = req->expires - jiffies;
+ if (tmo < 0)
+ tmo = 0;
+
+ r->id.idiag_sport = inet->sport;
+ r->id.idiag_dport = ireq->rmt_port;
+ r->id.idiag_src[0] = ireq->loc_addr;
+ r->id.idiag_dst[0] = ireq->rmt_addr;
+ r->idiag_expires = jiffies_to_msecs(tmo);
+ r->idiag_rqueue = 0;
+ r->idiag_wqueue = 0;
+ r->idiag_uid = sock_i_uid(sk);
+ r->idiag_inode = 0;
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
+ if (r->idiag_family == AF_INET6) {
+ ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
+ &tcp6_rsk(req)->loc_addr);
+ ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
+ &tcp6_rsk(req)->rmt_addr);
+ }
+#endif
+ nlh->nlmsg_len = skb->tail - b;
+
+ return skb->len;
+
+nlmsg_failure:
+ skb_trim(skb, b - skb->data);
+ return -1;
+}
+
+static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk,
+ struct netlink_callback *cb)
+{
+ struct inet_diag_entry entry;
+ struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ struct listen_sock *lopt;
+ struct rtattr *bc = NULL;
+ struct inet_sock *inet = inet_sk(sk);
+ int j, s_j;
+ int reqnum, s_reqnum;
+ int err = 0;
+
+ s_j = cb->args[3];
+ s_reqnum = cb->args[4];
+
+ if (s_j > 0)
+ s_j--;
+
+ entry.family = sk->sk_family;
+
+ read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
+
+ lopt = icsk->icsk_accept_queue.listen_opt;
+ if (!lopt || !lopt->qlen)
+ goto out;
+
+ if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
+ bc = (struct rtattr *)(r + 1);
+ entry.sport = inet->num;
+ entry.userlocks = sk->sk_userlocks;
+ }
+
+ for (j = s_j; j < lopt->nr_table_entries; j++) {
+ struct request_sock *req, *head = lopt->syn_table[j];
+
+ reqnum = 0;
+ for (req = head; req; reqnum++, req = req->dl_next) {
+ struct inet_request_sock *ireq = inet_rsk(req);
+
+ if (reqnum < s_reqnum)
+ continue;
+ if (r->id.idiag_dport != ireq->rmt_port &&
+ r->id.idiag_dport)
+ continue;
+
+ if (bc) {
+ entry.saddr =
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
+ (entry.family == AF_INET6) ?
+ tcp6_rsk(req)->loc_addr.s6_addr32 :
+#endif
+ &ireq->loc_addr;
+ entry.daddr =
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
+ (entry.family == AF_INET6) ?
+ tcp6_rsk(req)->rmt_addr.s6_addr32 :
+#endif
+ &ireq->rmt_addr;
+ entry.dport = ntohs(ireq->rmt_port);
+
+ if (!inet_diag_bc_run(RTA_DATA(bc),
+ RTA_PAYLOAD(bc), &entry))
+ continue;
+ }
+
+ err = inet_diag_fill_req(skb, sk, req,
+ NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq, cb->nlh);
+ if (err < 0) {
+ cb->args[3] = j + 1;
+ cb->args[4] = reqnum;
+ goto out;
+ }
+ }
+
+ s_reqnum = 0;
+ }
+
+out:
+ read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
+
+ return err;
+}
+
+static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ int i, num;
+ int s_i, s_num;
+ struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
+ const struct inet_diag_handler *handler;
+ struct inet_hashinfo *hashinfo;
+
+ handler = inet_diag_table[cb->nlh->nlmsg_type];
+ BUG_ON(handler == NULL);
+ hashinfo = handler->idiag_hashinfo;
+
+ s_i = cb->args[1];
+ s_num = num = cb->args[2];
+
+ if (cb->args[0] == 0) {
+ if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV)))
+ goto skip_listen_ht;
+
+ inet_listen_lock(hashinfo);
+ for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
+ struct sock *sk;
+ struct hlist_node *node;
+
+ num = 0;
+ sk_for_each(sk, node, &hashinfo->listening_hash[i]) {
+ struct inet_sock *inet = inet_sk(sk);
+
+ if (num < s_num) {
+ num++;
+ continue;
+ }
+
+ if (r->id.idiag_sport != inet->sport &&
+ r->id.idiag_sport)
+ goto next_listen;
+
+ if (!(r->idiag_states & TCPF_LISTEN) ||
+ r->id.idiag_dport ||
+ cb->args[3] > 0)
+ goto syn_recv;
+
+ if (inet_diag_dump_sock(skb, sk, cb) < 0) {
+ inet_listen_unlock(hashinfo);
+ goto done;
+ }
+
+syn_recv:
+ if (!(r->idiag_states & TCPF_SYN_RECV))
+ goto next_listen;
+
+ if (inet_diag_dump_reqs(skb, sk, cb) < 0) {
+ inet_listen_unlock(hashinfo);
+ goto done;
+ }
+
+next_listen:
+ cb->args[3] = 0;
+ cb->args[4] = 0;
+ ++num;
+ }
+
+ s_num = 0;
+ cb->args[3] = 0;
+ cb->args[4] = 0;
+ }
+ inet_listen_unlock(hashinfo);
+skip_listen_ht:
+ cb->args[0] = 1;
+ s_i = num = s_num = 0;
+ }
+
+ if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV)))
+ return skb->len;
+
+ for (i = s_i; i < hashinfo->ehash_size; i++) {
+ struct inet_ehash_bucket *head = &hashinfo->ehash[i];
+ struct sock *sk;
+ struct hlist_node *node;
+
+ if (i > s_i)
+ s_num = 0;
+
+ read_lock_bh(&head->lock);
+
+ num = 0;
+ sk_for_each(sk, node, &head->chain) {
+ struct inet_sock *inet = inet_sk(sk);
+
+ if (num < s_num)
+ goto next_normal;
+ if (!(r->idiag_states & (1 << sk->sk_state)))
+ goto next_normal;
+ if (r->id.idiag_sport != inet->sport &&
+ r->id.idiag_sport)
+ goto next_normal;
+ if (r->id.idiag_dport != inet->dport && r->id.idiag_dport)
+ goto next_normal;
+ if (inet_diag_dump_sock(skb, sk, cb) < 0) {
+ read_unlock_bh(&head->lock);
+ goto done;
+ }
+next_normal:
+ ++num;
+ }
+
+ if (r->idiag_states & TCPF_TIME_WAIT) {
+ sk_for_each(sk, node,
+ &hashinfo->ehash[i + hashinfo->ehash_size].chain) {
+ struct inet_sock *inet = inet_sk(sk);
+
+ if (num < s_num)
+ goto next_dying;
+ if (r->id.idiag_sport != inet->sport &&
+ r->id.idiag_sport)
+ goto next_dying;
+ if (r->id.idiag_dport != inet->dport &&
+ r->id.idiag_dport)
+ goto next_dying;
+ if (inet_diag_dump_sock(skb, sk, cb) < 0) {
+ read_unlock_bh(&head->lock);
+ goto done;
+ }
+next_dying:
+ ++num;
+ }
+ }
+ read_unlock_bh(&head->lock);
+ }
+
+done:
+ cb->args[1] = i;
+ cb->args[2] = num;
+ return skb->len;
+}
+
+static int inet_diag_dump_done(struct netlink_callback *cb)
+{
+ return 0;
+}
+
+
+static __inline__ int
+inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
+{
+ if (!(nlh->nlmsg_flags&NLM_F_REQUEST))
+ return 0;
+
+ if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX)
+ goto err_inval;
+
+ if (inet_diag_table[nlh->nlmsg_type] == NULL)
+ return -ENOENT;
+
+ if (NLMSG_LENGTH(sizeof(struct inet_diag_req)) > skb->len)
+ goto err_inval;
+
+ if (nlh->nlmsg_flags&NLM_F_DUMP) {
+ if (nlh->nlmsg_len >
+ (4 + NLMSG_SPACE(sizeof(struct inet_diag_req)))) {
+ struct rtattr *rta = (void *)(NLMSG_DATA(nlh) +
+ sizeof(struct inet_diag_req));
+ if (rta->rta_type != INET_DIAG_REQ_BYTECODE ||
+ rta->rta_len < 8 ||
+ rta->rta_len >
+ (nlh->nlmsg_len -
+ NLMSG_SPACE(sizeof(struct inet_diag_req))))
+ goto err_inval;
+ if (inet_diag_bc_audit(RTA_DATA(rta), RTA_PAYLOAD(rta)))
+ goto err_inval;
+ }
+ return netlink_dump_start(idiagnl, skb, nlh,
+ inet_diag_dump,
+ inet_diag_dump_done);
+ } else {
+ return inet_diag_get_exact(skb, nlh);
+ }
+
+err_inval:
+ return -EINVAL;
+}
+
+
+static inline void inet_diag_rcv_skb(struct sk_buff *skb)
+{
+ int err;
+ struct nlmsghdr * nlh;
+
+ if (skb->len >= NLMSG_SPACE(0)) {
+ nlh = (struct nlmsghdr *)skb->data;
+ if (nlh->nlmsg_len < sizeof(*nlh) || skb->len < nlh->nlmsg_len)
+ return;
+ err = inet_diag_rcv_msg(skb, nlh);
+ if (err || nlh->nlmsg_flags & NLM_F_ACK)
+ netlink_ack(skb, nlh, err);
+ }
+}
+
+static void inet_diag_rcv(struct sock *sk, int len)
+{
+ struct sk_buff *skb;
+ unsigned int qlen = skb_queue_len(&sk->sk_receive_queue);
+
+ while (qlen-- && (skb = skb_dequeue(&sk->sk_receive_queue))) {
+ inet_diag_rcv_skb(skb);
+ kfree_skb(skb);
+ }
+}
+
+static void tcp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
+ void *_info)
+{
+ const struct tcp_sock *tp = tcp_sk(sk);
+ struct tcp_info *info = _info;
+
+ r->idiag_rqueue = tp->rcv_nxt - tp->copied_seq;
+ r->idiag_wqueue = tp->write_seq - tp->snd_una;
+ if (info != NULL)
+ tcp_get_info(sk, info);
+}
+
+static struct inet_diag_handler tcp_diag_handler = {
+ .idiag_hashinfo = &tcp_hashinfo,
+ .idiag_get_info = tcp_diag_get_info,
+ .idiag_type = TCPDIAG_GETSOCK,
+ .idiag_info_size = sizeof(struct tcp_info),
+};
+
+static DEFINE_SPINLOCK(inet_diag_register_lock);
+
+int inet_diag_register(const struct inet_diag_handler *h)
+{
+ const __u16 type = h->idiag_type;
+ int err = -EINVAL;
+
+ if (type >= INET_DIAG_GETSOCK_MAX)
+ goto out;
+
+ spin_lock(&inet_diag_register_lock);
+ err = -EEXIST;
+ if (inet_diag_table[type] == NULL) {
+ inet_diag_table[type] = h;
+ err = 0;
+ }
+ spin_unlock(&inet_diag_register_lock);
+out:
+ return err;
+}
+EXPORT_SYMBOL_GPL(inet_diag_register);
+
+void inet_diag_unregister(const struct inet_diag_handler *h)
+{
+ const __u16 type = h->idiag_type;
+
+ if (type >= INET_DIAG_GETSOCK_MAX)
+ return;
+
+ spin_lock(&inet_diag_register_lock);
+ inet_diag_table[type] = NULL;
+ spin_unlock(&inet_diag_register_lock);
+
+ synchronize_rcu();
+}
+EXPORT_SYMBOL_GPL(inet_diag_unregister);
+
+static int __init inet_diag_init(void)
+{
+ const int inet_diag_table_size = (INET_DIAG_GETSOCK_MAX *
+ sizeof(struct inet_diag_handler *));
+ int err = -ENOMEM;
+
+ inet_diag_table = kmalloc(inet_diag_table_size, GFP_KERNEL);
+ if (!inet_diag_table)
+ goto out;
+
+ memset(inet_diag_table, 0, inet_diag_table_size);
+
+ idiagnl = netlink_kernel_create(NETLINK_INET_DIAG, inet_diag_rcv,
+ THIS_MODULE);
+ if (idiagnl == NULL)
+ goto out_free_table;
+
+ err = inet_diag_register(&tcp_diag_handler);
+ if (err)
+ goto out_sock_release;
+out:
+ return err;
+out_sock_release:
+ sock_release(idiagnl->sk_socket);
+out_free_table:
+ kfree(inet_diag_table);
+ goto out;
+}
+
+static void __exit inet_diag_exit(void)
+{
+ sock_release(idiagnl->sk_socket);
+ kfree(inet_diag_table);
+}
+
+module_init(inet_diag_init);
+module_exit(inet_diag_exit);
+MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * inet_diag.c Module for monitoring INET transport protocols sockets.
- *
- * Version: $Id: inet_diag.c,v 1.3 2002/02/01 22:01:04 davem Exp $
- *
- * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
- *
- * 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.
- */
-
-#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/fcntl.h>
-#include <linux/random.h>
-#include <linux/cache.h>
-#include <linux/init.h>
-#include <linux/time.h>
-
-#include <net/icmp.h>
-#include <net/tcp.h>
-#include <net/ipv6.h>
-#include <net/inet_common.h>
-#include <net/inet_connection_sock.h>
-#include <net/inet_hashtables.h>
-#include <net/inet_timewait_sock.h>
-#include <net/inet6_hashtables.h>
-
-#include <linux/inet.h>
-#include <linux/stddef.h>
-
-#include <linux/tcp_diag.h>
-
-static const struct inet_diag_handler **inet_diag_table;
-
-struct inet_diag_entry {
- u32 *saddr;
- u32 *daddr;
- u16 sport;
- u16 dport;
- u16 family;
- u16 userlocks;
-};
-
-static struct sock *idiagnl;
-
-#define INET_DIAG_PUT(skb, attrtype, attrlen) \
- RTA_DATA(__RTA_PUT(skb, attrtype, attrlen))
-
-static int inet_diag_fill(struct sk_buff *skb, struct sock *sk,
- int ext, u32 pid, u32 seq, u16 nlmsg_flags,
- const struct nlmsghdr *unlh)
-{
- const struct inet_sock *inet = inet_sk(sk);
- const struct inet_connection_sock *icsk = inet_csk(sk);
- struct inet_diag_msg *r;
- struct nlmsghdr *nlh;
- void *info = NULL;
- struct inet_diag_meminfo *minfo = NULL;
- unsigned char *b = skb->tail;
- const struct inet_diag_handler *handler;
-
- handler = inet_diag_table[unlh->nlmsg_type];
- BUG_ON(handler == NULL);
-
- nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
- nlh->nlmsg_flags = nlmsg_flags;
-
- r = NLMSG_DATA(nlh);
- if (sk->sk_state != TCP_TIME_WAIT) {
- if (ext & (1 << (INET_DIAG_MEMINFO - 1)))
- minfo = INET_DIAG_PUT(skb, INET_DIAG_MEMINFO,
- sizeof(*minfo));
- if (ext & (1 << (INET_DIAG_INFO - 1)))
- info = INET_DIAG_PUT(skb, INET_DIAG_INFO,
- handler->idiag_info_size);
-
- if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) {
- size_t len = strlen(icsk->icsk_ca_ops->name);
- strcpy(INET_DIAG_PUT(skb, INET_DIAG_CONG, len + 1),
- icsk->icsk_ca_ops->name);
- }
- }
- r->idiag_family = sk->sk_family;
- r->idiag_state = sk->sk_state;
- r->idiag_timer = 0;
- r->idiag_retrans = 0;
-
- r->id.idiag_if = sk->sk_bound_dev_if;
- r->id.idiag_cookie[0] = (u32)(unsigned long)sk;
- r->id.idiag_cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1);
-
- if (r->idiag_state == TCP_TIME_WAIT) {
- const struct inet_timewait_sock *tw = inet_twsk(sk);
- long tmo = tw->tw_ttd - jiffies;
- if (tmo < 0)
- tmo = 0;
-
- r->id.idiag_sport = tw->tw_sport;
- r->id.idiag_dport = tw->tw_dport;
- r->id.idiag_src[0] = tw->tw_rcv_saddr;
- r->id.idiag_dst[0] = tw->tw_daddr;
- r->idiag_state = tw->tw_substate;
- r->idiag_timer = 3;
- r->idiag_expires = (tmo * 1000 + HZ - 1) / HZ;
- r->idiag_rqueue = 0;
- r->idiag_wqueue = 0;
- r->idiag_uid = 0;
- r->idiag_inode = 0;
-#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
- if (r->idiag_family == AF_INET6) {
- const struct tcp6_timewait_sock *tcp6tw = tcp6_twsk(sk);
-
- ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
- &tcp6tw->tw_v6_rcv_saddr);
- ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
- &tcp6tw->tw_v6_daddr);
- }
-#endif
- nlh->nlmsg_len = skb->tail - b;
- return skb->len;
- }
-
- r->id.idiag_sport = inet->sport;
- r->id.idiag_dport = inet->dport;
- r->id.idiag_src[0] = inet->rcv_saddr;
- r->id.idiag_dst[0] = inet->daddr;
-
-#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
- if (r->idiag_family == AF_INET6) {
- struct ipv6_pinfo *np = inet6_sk(sk);
-
- ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
- &np->rcv_saddr);
- ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
- &np->daddr);
- }
-#endif
-
-#define EXPIRES_IN_MS(tmo) ((tmo-jiffies)*1000+HZ-1)/HZ
-
- if (icsk->icsk_pending == ICSK_TIME_RETRANS) {
- r->idiag_timer = 1;
- r->idiag_retrans = icsk->icsk_retransmits;
- r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
- } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
- r->idiag_timer = 4;
- r->idiag_retrans = icsk->icsk_probes_out;
- r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
- } else if (timer_pending(&sk->sk_timer)) {
- r->idiag_timer = 2;
- r->idiag_retrans = icsk->icsk_probes_out;
- r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
- } else {
- r->idiag_timer = 0;
- r->idiag_expires = 0;
- }
-#undef EXPIRES_IN_MS
-
- r->idiag_uid = sock_i_uid(sk);
- r->idiag_inode = sock_i_ino(sk);
-
- if (minfo) {
- minfo->idiag_rmem = atomic_read(&sk->sk_rmem_alloc);
- minfo->idiag_wmem = sk->sk_wmem_queued;
- minfo->idiag_fmem = sk->sk_forward_alloc;
- minfo->idiag_tmem = atomic_read(&sk->sk_wmem_alloc);
- }
-
- handler->idiag_get_info(sk, r, info);
-
- if (sk->sk_state < TCP_TIME_WAIT &&
- icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info)
- icsk->icsk_ca_ops->get_info(sk, ext, skb);
-
- nlh->nlmsg_len = skb->tail - b;
- return skb->len;
-
-rtattr_failure:
-nlmsg_failure:
- skb_trim(skb, b - skb->data);
- return -1;
-}
-
-static int inet_diag_get_exact(struct sk_buff *in_skb, const struct nlmsghdr *nlh)
-{
- int err;
- struct sock *sk;
- struct inet_diag_req *req = NLMSG_DATA(nlh);
- struct sk_buff *rep;
- struct inet_hashinfo *hashinfo;
- const struct inet_diag_handler *handler;
-
- handler = inet_diag_table[nlh->nlmsg_type];
- BUG_ON(handler == NULL);
- hashinfo = handler->idiag_hashinfo;
-
- if (req->idiag_family == AF_INET) {
- sk = inet_lookup(hashinfo, req->id.idiag_dst[0],
- req->id.idiag_dport, req->id.idiag_src[0],
- req->id.idiag_sport, req->id.idiag_if);
- }
-#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
- else if (req->idiag_family == AF_INET6) {
- sk = inet6_lookup(hashinfo,
- (struct in6_addr *)req->id.idiag_dst,
- req->id.idiag_dport,
- (struct in6_addr *)req->id.idiag_src,
- req->id.idiag_sport,
- req->id.idiag_if);
- }
-#endif
- else {
- return -EINVAL;
- }
-
- if (sk == NULL)
- return -ENOENT;
-
- err = -ESTALE;
- if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE ||
- req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) &&
- ((u32)(unsigned long)sk != req->id.idiag_cookie[0] ||
- (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1]))
- goto out;
-
- err = -ENOMEM;
- rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) +
- sizeof(struct inet_diag_meminfo) +
- handler->idiag_info_size + 64)),
- GFP_KERNEL);
- if (!rep)
- goto out;
-
- if (inet_diag_fill(rep, sk, req->idiag_ext,
- NETLINK_CB(in_skb).pid,
- nlh->nlmsg_seq, 0, nlh) <= 0)
- BUG();
-
- err = netlink_unicast(idiagnl, rep, NETLINK_CB(in_skb).pid,
- MSG_DONTWAIT);
- if (err > 0)
- err = 0;
-
-out:
- if (sk) {
- if (sk->sk_state == TCP_TIME_WAIT)
- inet_twsk_put((struct inet_timewait_sock *)sk);
- else
- sock_put(sk);
- }
- return err;
-}
-
-static int bitstring_match(const u32 *a1, const u32 *a2, int bits)
-{
- int words = bits >> 5;
-
- bits &= 0x1f;
-
- if (words) {
- if (memcmp(a1, a2, words << 2))
- return 0;
- }
- if (bits) {
- __u32 w1, w2;
- __u32 mask;
-
- w1 = a1[words];
- w2 = a2[words];
-
- mask = htonl((0xffffffff) << (32 - bits));
-
- if ((w1 ^ w2) & mask)
- return 0;
- }
-
- return 1;
-}
-
-
-static int inet_diag_bc_run(const void *bc, int len,
- const struct inet_diag_entry *entry)
-{
- while (len > 0) {
- int yes = 1;
- const struct inet_diag_bc_op *op = bc;
-
- switch (op->code) {
- case INET_DIAG_BC_NOP:
- break;
- case INET_DIAG_BC_JMP:
- yes = 0;
- break;
- case INET_DIAG_BC_S_GE:
- yes = entry->sport >= op[1].no;
- break;
- case INET_DIAG_BC_S_LE:
- yes = entry->dport <= op[1].no;
- break;
- case INET_DIAG_BC_D_GE:
- yes = entry->dport >= op[1].no;
- break;
- case INET_DIAG_BC_D_LE:
- yes = entry->dport <= op[1].no;
- break;
- case INET_DIAG_BC_AUTO:
- yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
- break;
- case INET_DIAG_BC_S_COND:
- case INET_DIAG_BC_D_COND:
- {
- struct inet_diag_hostcond *cond = (struct inet_diag_hostcond*)(op+1);
- u32 *addr;
-
- if (cond->port != -1 &&
- cond->port != (op->code == INET_DIAG_BC_S_COND ?
- entry->sport : entry->dport)) {
- yes = 0;
- break;
- }
-
- if (cond->prefix_len == 0)
- break;
-
- if (op->code == INET_DIAG_BC_S_COND)
- addr = entry->saddr;
- else
- addr = entry->daddr;
-
- if (bitstring_match(addr, cond->addr, cond->prefix_len))
- break;
- if (entry->family == AF_INET6 &&
- cond->family == AF_INET) {
- if (addr[0] == 0 && addr[1] == 0 &&
- addr[2] == htonl(0xffff) &&
- bitstring_match(addr+3, cond->addr, cond->prefix_len))
- break;
- }
- yes = 0;
- break;
- }
- }
-
- if (yes) {
- len -= op->yes;
- bc += op->yes;
- } else {
- len -= op->no;
- bc += op->no;
- }
- }
- return (len == 0);
-}
-
-static int valid_cc(const void *bc, int len, int cc)
-{
- while (len >= 0) {
- const struct inet_diag_bc_op *op = bc;
-
- if (cc > len)
- return 0;
- if (cc == len)
- return 1;
- if (op->yes < 4)
- return 0;
- len -= op->yes;
- bc += op->yes;
- }
- return 0;
-}
-
-static int inet_diag_bc_audit(const void *bytecode, int bytecode_len)
-{
- const unsigned char *bc = bytecode;
- int len = bytecode_len;
-
- while (len > 0) {
- struct inet_diag_bc_op *op = (struct inet_diag_bc_op*)bc;
-
-//printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len);
- switch (op->code) {
- case INET_DIAG_BC_AUTO:
- case INET_DIAG_BC_S_COND:
- case INET_DIAG_BC_D_COND:
- case INET_DIAG_BC_S_GE:
- case INET_DIAG_BC_S_LE:
- case INET_DIAG_BC_D_GE:
- case INET_DIAG_BC_D_LE:
- if (op->yes < 4 || op->yes > len+4)
- return -EINVAL;
- case INET_DIAG_BC_JMP:
- if (op->no < 4 || op->no > len+4)
- return -EINVAL;
- if (op->no < len &&
- !valid_cc(bytecode, bytecode_len, len-op->no))
- return -EINVAL;
- break;
- case INET_DIAG_BC_NOP:
- if (op->yes < 4 || op->yes > len+4)
- return -EINVAL;
- break;
- default:
- return -EINVAL;
- }
- bc += op->yes;
- len -= op->yes;
- }
- return len == 0 ? 0 : -EINVAL;
-}
-
-static int inet_diag_dump_sock(struct sk_buff *skb, struct sock *sk,
- struct netlink_callback *cb)
-{
- struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
-
- if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
- struct inet_diag_entry entry;
- struct rtattr *bc = (struct rtattr *)(r + 1);
- struct inet_sock *inet = inet_sk(sk);
-
- entry.family = sk->sk_family;
-#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
- if (entry.family == AF_INET6) {
- struct ipv6_pinfo *np = inet6_sk(sk);
-
- entry.saddr = np->rcv_saddr.s6_addr32;
- entry.daddr = np->daddr.s6_addr32;
- } else
-#endif
- {
- entry.saddr = &inet->rcv_saddr;
- entry.daddr = &inet->daddr;
- }
- entry.sport = inet->num;
- entry.dport = ntohs(inet->dport);
- entry.userlocks = sk->sk_userlocks;
-
- if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry))
- return 0;
- }
-
- return inet_diag_fill(skb, sk, r->idiag_ext, NETLINK_CB(cb->skb).pid,
- cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
-}
-
-static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk,
- struct request_sock *req,
- u32 pid, u32 seq,
- const struct nlmsghdr *unlh)
-{
- const struct inet_request_sock *ireq = inet_rsk(req);
- struct inet_sock *inet = inet_sk(sk);
- unsigned char *b = skb->tail;
- struct inet_diag_msg *r;
- struct nlmsghdr *nlh;
- long tmo;
-
- nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
- nlh->nlmsg_flags = NLM_F_MULTI;
- r = NLMSG_DATA(nlh);
-
- r->idiag_family = sk->sk_family;
- r->idiag_state = TCP_SYN_RECV;
- r->idiag_timer = 1;
- r->idiag_retrans = req->retrans;
-
- r->id.idiag_if = sk->sk_bound_dev_if;
- r->id.idiag_cookie[0] = (u32)(unsigned long)req;
- r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1);
-
- tmo = req->expires - jiffies;
- if (tmo < 0)
- tmo = 0;
-
- r->id.idiag_sport = inet->sport;
- r->id.idiag_dport = ireq->rmt_port;
- r->id.idiag_src[0] = ireq->loc_addr;
- r->id.idiag_dst[0] = ireq->rmt_addr;
- r->idiag_expires = jiffies_to_msecs(tmo);
- r->idiag_rqueue = 0;
- r->idiag_wqueue = 0;
- r->idiag_uid = sock_i_uid(sk);
- r->idiag_inode = 0;
-#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
- if (r->idiag_family == AF_INET6) {
- ipv6_addr_copy((struct in6_addr *)r->id.idiag_src,
- &tcp6_rsk(req)->loc_addr);
- ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst,
- &tcp6_rsk(req)->rmt_addr);
- }
-#endif
- nlh->nlmsg_len = skb->tail - b;
-
- return skb->len;
-
-nlmsg_failure:
- skb_trim(skb, b - skb->data);
- return -1;
-}
-
-static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk,
- struct netlink_callback *cb)
-{
- struct inet_diag_entry entry;
- struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
- struct inet_connection_sock *icsk = inet_csk(sk);
- struct listen_sock *lopt;
- struct rtattr *bc = NULL;
- struct inet_sock *inet = inet_sk(sk);
- int j, s_j;
- int reqnum, s_reqnum;
- int err = 0;
-
- s_j = cb->args[3];
- s_reqnum = cb->args[4];
-
- if (s_j > 0)
- s_j--;
-
- entry.family = sk->sk_family;
-
- read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
-
- lopt = icsk->icsk_accept_queue.listen_opt;
- if (!lopt || !lopt->qlen)
- goto out;
-
- if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
- bc = (struct rtattr *)(r + 1);
- entry.sport = inet->num;
- entry.userlocks = sk->sk_userlocks;
- }
-
- for (j = s_j; j < lopt->nr_table_entries; j++) {
- struct request_sock *req, *head = lopt->syn_table[j];
-
- reqnum = 0;
- for (req = head; req; reqnum++, req = req->dl_next) {
- struct inet_request_sock *ireq = inet_rsk(req);
-
- if (reqnum < s_reqnum)
- continue;
- if (r->id.idiag_dport != ireq->rmt_port &&
- r->id.idiag_dport)
- continue;
-
- if (bc) {
- entry.saddr =
-#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
- (entry.family == AF_INET6) ?
- tcp6_rsk(req)->loc_addr.s6_addr32 :
-#endif
- &ireq->loc_addr;
- entry.daddr =
-#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
- (entry.family == AF_INET6) ?
- tcp6_rsk(req)->rmt_addr.s6_addr32 :
-#endif
- &ireq->rmt_addr;
- entry.dport = ntohs(ireq->rmt_port);
-
- if (!inet_diag_bc_run(RTA_DATA(bc),
- RTA_PAYLOAD(bc), &entry))
- continue;
- }
-
- err = inet_diag_fill_req(skb, sk, req,
- NETLINK_CB(cb->skb).pid,
- cb->nlh->nlmsg_seq, cb->nlh);
- if (err < 0) {
- cb->args[3] = j + 1;
- cb->args[4] = reqnum;
- goto out;
- }
- }
-
- s_reqnum = 0;
- }
-
-out:
- read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
-
- return err;
-}
-
-static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
-{
- int i, num;
- int s_i, s_num;
- struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
- const struct inet_diag_handler *handler;
- struct inet_hashinfo *hashinfo;
-
- handler = inet_diag_table[cb->nlh->nlmsg_type];
- BUG_ON(handler == NULL);
- hashinfo = handler->idiag_hashinfo;
-
- s_i = cb->args[1];
- s_num = num = cb->args[2];
-
- if (cb->args[0] == 0) {
- if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV)))
- goto skip_listen_ht;
-
- inet_listen_lock(hashinfo);
- for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
- struct sock *sk;
- struct hlist_node *node;
-
- num = 0;
- sk_for_each(sk, node, &hashinfo->listening_hash[i]) {
- struct inet_sock *inet = inet_sk(sk);
-
- if (num < s_num) {
- num++;
- continue;
- }
-
- if (r->id.idiag_sport != inet->sport &&
- r->id.idiag_sport)
- goto next_listen;
-
- if (!(r->idiag_states & TCPF_LISTEN) ||
- r->id.idiag_dport ||
- cb->args[3] > 0)
- goto syn_recv;
-
- if (inet_diag_dump_sock(skb, sk, cb) < 0) {
- inet_listen_unlock(hashinfo);
- goto done;
- }
-
-syn_recv:
- if (!(r->idiag_states & TCPF_SYN_RECV))
- goto next_listen;
-
- if (inet_diag_dump_reqs(skb, sk, cb) < 0) {
- inet_listen_unlock(hashinfo);
- goto done;
- }
-
-next_listen:
- cb->args[3] = 0;
- cb->args[4] = 0;
- ++num;
- }
-
- s_num = 0;
- cb->args[3] = 0;
- cb->args[4] = 0;
- }
- inet_listen_unlock(hashinfo);
-skip_listen_ht:
- cb->args[0] = 1;
- s_i = num = s_num = 0;
- }
-
- if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV)))
- return skb->len;
-
- for (i = s_i; i < hashinfo->ehash_size; i++) {
- struct inet_ehash_bucket *head = &hashinfo->ehash[i];
- struct sock *sk;
- struct hlist_node *node;
-
- if (i > s_i)
- s_num = 0;
-
- read_lock_bh(&head->lock);
-
- num = 0;
- sk_for_each(sk, node, &head->chain) {
- struct inet_sock *inet = inet_sk(sk);
-
- if (num < s_num)
- goto next_normal;
- if (!(r->idiag_states & (1 << sk->sk_state)))
- goto next_normal;
- if (r->id.idiag_sport != inet->sport &&
- r->id.idiag_sport)
- goto next_normal;
- if (r->id.idiag_dport != inet->dport && r->id.idiag_dport)
- goto next_normal;
- if (inet_diag_dump_sock(skb, sk, cb) < 0) {
- read_unlock_bh(&head->lock);
- goto done;
- }
-next_normal:
- ++num;
- }
-
- if (r->idiag_states & TCPF_TIME_WAIT) {
- sk_for_each(sk, node,
- &hashinfo->ehash[i + hashinfo->ehash_size].chain) {
- struct inet_sock *inet = inet_sk(sk);
-
- if (num < s_num)
- goto next_dying;
- if (r->id.idiag_sport != inet->sport &&
- r->id.idiag_sport)
- goto next_dying;
- if (r->id.idiag_dport != inet->dport &&
- r->id.idiag_dport)
- goto next_dying;
- if (inet_diag_dump_sock(skb, sk, cb) < 0) {
- read_unlock_bh(&head->lock);
- goto done;
- }
-next_dying:
- ++num;
- }
- }
- read_unlock_bh(&head->lock);
- }
-
-done:
- cb->args[1] = i;
- cb->args[2] = num;
- return skb->len;
-}
-
-static int inet_diag_dump_done(struct netlink_callback *cb)
-{
- return 0;
-}
-
-
-static __inline__ int
-inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
-{
- if (!(nlh->nlmsg_flags&NLM_F_REQUEST))
- return 0;
-
- if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX)
- goto err_inval;
-
- if (inet_diag_table[nlh->nlmsg_type] == NULL)
- return -ENOENT;
-
- if (NLMSG_LENGTH(sizeof(struct inet_diag_req)) > skb->len)
- goto err_inval;
-
- if (nlh->nlmsg_flags&NLM_F_DUMP) {
- if (nlh->nlmsg_len >
- (4 + NLMSG_SPACE(sizeof(struct inet_diag_req)))) {
- struct rtattr *rta = (void *)(NLMSG_DATA(nlh) +
- sizeof(struct inet_diag_req));
- if (rta->rta_type != INET_DIAG_REQ_BYTECODE ||
- rta->rta_len < 8 ||
- rta->rta_len >
- (nlh->nlmsg_len -
- NLMSG_SPACE(sizeof(struct inet_diag_req))))
- goto err_inval;
- if (inet_diag_bc_audit(RTA_DATA(rta), RTA_PAYLOAD(rta)))
- goto err_inval;
- }
- return netlink_dump_start(idiagnl, skb, nlh,
- inet_diag_dump,
- inet_diag_dump_done);
- } else {
- return inet_diag_get_exact(skb, nlh);
- }
-
-err_inval:
- return -EINVAL;
-}
-
-
-static inline void inet_diag_rcv_skb(struct sk_buff *skb)
-{
- int err;
- struct nlmsghdr * nlh;
-
- if (skb->len >= NLMSG_SPACE(0)) {
- nlh = (struct nlmsghdr *)skb->data;
- if (nlh->nlmsg_len < sizeof(*nlh) || skb->len < nlh->nlmsg_len)
- return;
- err = inet_diag_rcv_msg(skb, nlh);
- if (err || nlh->nlmsg_flags & NLM_F_ACK)
- netlink_ack(skb, nlh, err);
- }
-}
-
-static void inet_diag_rcv(struct sock *sk, int len)
-{
- struct sk_buff *skb;
- unsigned int qlen = skb_queue_len(&sk->sk_receive_queue);
-
- while (qlen-- && (skb = skb_dequeue(&sk->sk_receive_queue))) {
- inet_diag_rcv_skb(skb);
- kfree_skb(skb);
- }
-}
-
-static void tcp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
- void *_info)
-{
- const struct tcp_sock *tp = tcp_sk(sk);
- struct tcp_info *info = _info;
-
- r->idiag_rqueue = tp->rcv_nxt - tp->copied_seq;
- r->idiag_wqueue = tp->write_seq - tp->snd_una;
- if (info != NULL)
- tcp_get_info(sk, info);
-}
-
-static struct inet_diag_handler tcp_diag_handler = {
- .idiag_hashinfo = &tcp_hashinfo,
- .idiag_get_info = tcp_diag_get_info,
- .idiag_type = TCPDIAG_GETSOCK,
- .idiag_info_size = sizeof(struct tcp_info),
-};
-
-static DEFINE_SPINLOCK(inet_diag_register_lock);
-
-int inet_diag_register(const struct inet_diag_handler *h)
-{
- const __u16 type = h->idiag_type;
- int err = -EINVAL;
-
- if (type >= INET_DIAG_GETSOCK_MAX)
- goto out;
-
- spin_lock(&inet_diag_register_lock);
- err = -EEXIST;
- if (inet_diag_table[type] == NULL) {
- inet_diag_table[type] = h;
- err = 0;
- }
- spin_unlock(&inet_diag_register_lock);
-out:
- return err;
-}
-EXPORT_SYMBOL_GPL(inet_diag_register);
-
-void inet_diag_unregister(const struct inet_diag_handler *h)
-{
- const __u16 type = h->idiag_type;
-
- if (type >= INET_DIAG_GETSOCK_MAX)
- return;
-
- spin_lock(&inet_diag_register_lock);
- inet_diag_table[type] = NULL;
- spin_unlock(&inet_diag_register_lock);
-
- synchronize_rcu();
-}
-EXPORT_SYMBOL_GPL(inet_diag_unregister);
-
-static int __init inet_diag_init(void)
-{
- const int inet_diag_table_size = (INET_DIAG_GETSOCK_MAX *
- sizeof(struct inet_diag_handler *));
- int err = -ENOMEM;
-
- inet_diag_table = kmalloc(inet_diag_table_size, GFP_KERNEL);
- if (!inet_diag_table)
- goto out;
-
- memset(inet_diag_table, 0, inet_diag_table_size);
-
- idiagnl = netlink_kernel_create(NETLINK_INET_DIAG, inet_diag_rcv,
- THIS_MODULE);
- if (idiagnl == NULL)
- goto out_free_table;
-
- err = inet_diag_register(&tcp_diag_handler);
- if (err)
- goto out_sock_release;
-out:
- return err;
-out_sock_release:
- sock_release(idiagnl->sk_socket);
-out_free_table:
- kfree(inet_diag_table);
- goto out;
-}
-
-static void __exit inet_diag_exit(void)
-{
- sock_release(idiagnl->sk_socket);
- kfree(inet_diag_table);
-}
-
-module_init(inet_diag_init);
-module_exit(inet_diag_exit);
-MODULE_LICENSE("GPL");
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/skbuff.h>
-#include <linux/tcp_diag.h>
+#include <linux/inet_diag.h>
#include <net/tcp.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/skbuff.h>
-#include <linux/tcp_diag.h>
+#include <linux/inet_diag.h>
#include <net/tcp.h>
/* TCP Westwood structure */
projects / openwrt / staging / blogic.git / commitdiff