zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/net/ipv4/inet_diag.c b/ap/os/linux/linux-3.4.x/net/ipv4/inet_diag.c
new file mode 100644
index 0000000..8cb3091
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/net/ipv4/inet_diag.c
@@ -0,0 +1,1197 @@
+/*
+ * inet_diag.c Module for monitoring INET transport protocols sockets.
+ *
+ * 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/kernel.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/random.h>
+#include <linux/slab.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 <net/netlink.h>
+
+#include <linux/inet.h>
+#include <linux/stddef.h>
+
+#include <linux/inet_diag.h>
+#include <linux/sock_diag.h>
+
+static const struct inet_diag_handler **inet_diag_table;
+
+struct inet_diag_entry {
+ __be32 *saddr;
+ __be32 *daddr;
+ u16 sport;
+ u16 dport;
+ u16 family;
+ u16 userlocks;
+#if IS_ENABLED(CONFIG_IPV6)
+ struct in6_addr saddr_storage; /* for IPv4-mapped-IPv6 addresses */
+ struct in6_addr daddr_storage; /* for IPv4-mapped-IPv6 addresses */
+#endif
+};
+
+#define INET_DIAG_PUT(skb, attrtype, attrlen) \
+ RTA_DATA(__RTA_PUT(skb, attrtype, attrlen))
+
+static DEFINE_MUTEX(inet_diag_table_mutex);
+
+static const struct inet_diag_handler *inet_diag_lock_handler(int proto)
+{
+ if (!inet_diag_table[proto])
+ request_module("net-pf-%d-proto-%d-type-%d-%d", PF_NETLINK,
+ NETLINK_SOCK_DIAG, AF_INET, proto);
+
+ mutex_lock(&inet_diag_table_mutex);
+ if (!inet_diag_table[proto])
+ return ERR_PTR(-ENOENT);
+
+ return inet_diag_table[proto];
+}
+
+static inline void inet_diag_unlock_handler(
+ const struct inet_diag_handler *handler)
+{
+ mutex_unlock(&inet_diag_table_mutex);
+}
+
+int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
+ struct sk_buff *skb, struct inet_diag_req_v2 *req,
+ u32 pid, u32 seq, u16 nlmsg_flags,
+ const struct nlmsghdr *unlh)
+{
+ const struct inet_sock *inet = inet_sk(sk);
+ struct inet_diag_msg *r;
+ struct nlmsghdr *nlh;
+ void *info = NULL;
+ struct inet_diag_meminfo *minfo = NULL;
+ unsigned char *b = skb_tail_pointer(skb);
+ const struct inet_diag_handler *handler;
+ int ext = req->idiag_ext;
+
+ handler = inet_diag_table[req->sdiag_protocol];
+ BUG_ON(handler == NULL);
+
+ nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
+ nlh->nlmsg_flags = nlmsg_flags;
+
+ r = NLMSG_DATA(nlh);
+ BUG_ON(sk->sk_state == TCP_TIME_WAIT);
+
+ if (ext & (1 << (INET_DIAG_MEMINFO - 1)))
+ minfo = INET_DIAG_PUT(skb, INET_DIAG_MEMINFO, sizeof(*minfo));
+
+ 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;
+ sock_diag_save_cookie(sk, r->id.idiag_cookie);
+
+ r->id.idiag_sport = inet->inet_sport;
+ r->id.idiag_dport = inet->inet_dport;
+
+ memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src));
+ memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst));
+
+ r->id.idiag_src[0] = inet->inet_rcv_saddr;
+ r->id.idiag_dst[0] = inet->inet_daddr;
+
+ /* IPv6 dual-stack sockets use inet->tos for IPv4 connections,
+ * hence this needs to be included regardless of socket family.
+ */
+ if (ext & (1 << (INET_DIAG_TOS - 1)))
+ RTA_PUT_U8(skb, INET_DIAG_TOS, inet->tos);
+
+#if IS_ENABLED(CONFIG_IPV6)
+ if (r->idiag_family == AF_INET6) {
+ const struct ipv6_pinfo *np = inet6_sk(sk);
+
+ *(struct in6_addr *)r->id.idiag_src = np->rcv_saddr;
+ *(struct in6_addr *)r->id.idiag_dst = np->daddr;
+ if (ext & (1 << (INET_DIAG_TCLASS - 1)))
+ RTA_PUT_U8(skb, INET_DIAG_TCLASS, np->tclass);
+ }
+#endif
+
+ r->idiag_uid = sock_i_uid(sk);
+ r->idiag_inode = sock_i_ino(sk);
+
+ if (minfo) {
+ minfo->idiag_rmem = sk_rmem_alloc_get(sk);
+ minfo->idiag_wmem = sk->sk_wmem_queued;
+ minfo->idiag_fmem = sk->sk_forward_alloc;
+ minfo->idiag_tmem = sk_wmem_alloc_get(sk);
+ }
+
+ if (ext & (1 << (INET_DIAG_SKMEMINFO - 1)))
+ if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO))
+ goto rtattr_failure;
+
+ if (icsk == NULL) {
+ handler->idiag_get_info(sk, r, NULL);
+ goto out;
+ }
+
+#define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, 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
+
+ if (ext & (1 << (INET_DIAG_INFO - 1)))
+ info = INET_DIAG_PUT(skb, INET_DIAG_INFO, sizeof(struct tcp_info));
+
+ if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) {
+ const size_t len = strlen(icsk->icsk_ca_ops->name);
+
+ strcpy(INET_DIAG_PUT(skb, INET_DIAG_CONG, len + 1),
+ icsk->icsk_ca_ops->name);
+ }
+
+ 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);
+
+out:
+ nlh->nlmsg_len = skb_tail_pointer(skb) - b;
+ return skb->len;
+
+rtattr_failure:
+nlmsg_failure:
+ nlmsg_trim(skb, b);
+ return -EMSGSIZE;
+}
+EXPORT_SYMBOL_GPL(inet_sk_diag_fill);
+
+static int inet_csk_diag_fill(struct sock *sk,
+ struct sk_buff *skb, struct inet_diag_req_v2 *req,
+ u32 pid, u32 seq, u16 nlmsg_flags,
+ const struct nlmsghdr *unlh)
+{
+ return inet_sk_diag_fill(sk, inet_csk(sk),
+ skb, req, pid, seq, nlmsg_flags, unlh);
+}
+
+static int inet_twsk_diag_fill(struct inet_timewait_sock *tw,
+ struct sk_buff *skb, struct inet_diag_req_v2 *req,
+ u32 pid, u32 seq, u16 nlmsg_flags,
+ const struct nlmsghdr *unlh)
+{
+ long tmo;
+ struct inet_diag_msg *r;
+ const unsigned char *previous_tail = skb_tail_pointer(skb);
+ struct nlmsghdr *nlh = NLMSG_PUT(skb, pid, seq,
+ unlh->nlmsg_type, sizeof(*r));
+
+ r = NLMSG_DATA(nlh);
+ BUG_ON(tw->tw_state != TCP_TIME_WAIT);
+
+ nlh->nlmsg_flags = nlmsg_flags;
+
+ tmo = tw->tw_ttd - jiffies;
+ if (tmo < 0)
+ tmo = 0;
+
+ r->idiag_family = tw->tw_family;
+ r->idiag_retrans = 0;
+
+ r->id.idiag_if = tw->tw_bound_dev_if;
+ sock_diag_save_cookie(tw, r->id.idiag_cookie);
+
+ r->id.idiag_sport = tw->tw_sport;
+ r->id.idiag_dport = tw->tw_dport;
+
+ memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src));
+ memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst));
+
+ 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 = DIV_ROUND_UP(tmo * 1000, HZ);
+ r->idiag_rqueue = 0;
+ r->idiag_wqueue = 0;
+ r->idiag_uid = 0;
+ r->idiag_inode = 0;
+#if IS_ENABLED(CONFIG_IPV6)
+ if (tw->tw_family == AF_INET6) {
+ const struct inet6_timewait_sock *tw6 =
+ inet6_twsk((struct sock *)tw);
+
+ *(struct in6_addr *)r->id.idiag_src = tw6->tw_v6_rcv_saddr;
+ *(struct in6_addr *)r->id.idiag_dst = tw6->tw_v6_daddr;
+ }
+#endif
+ nlh->nlmsg_len = skb_tail_pointer(skb) - previous_tail;
+ return skb->len;
+nlmsg_failure:
+ nlmsg_trim(skb, previous_tail);
+ return -EMSGSIZE;
+}
+
+static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
+ struct inet_diag_req_v2 *r, u32 pid, u32 seq, u16 nlmsg_flags,
+ const struct nlmsghdr *unlh)
+{
+ if (sk->sk_state == TCP_TIME_WAIT)
+ return inet_twsk_diag_fill((struct inet_timewait_sock *)sk,
+ skb, r, pid, seq, nlmsg_flags,
+ unlh);
+ return inet_csk_diag_fill(sk, skb, r, pid, seq, nlmsg_flags, unlh);
+}
+
+int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *in_skb,
+ const struct nlmsghdr *nlh, struct inet_diag_req_v2 *req)
+{
+ int err;
+ struct sock *sk;
+ struct sk_buff *rep;
+
+ err = -EINVAL;
+ if (req->sdiag_family == AF_INET) {
+ sk = inet_lookup(&init_net, hashinfo, req->id.idiag_dst[0],
+ req->id.idiag_dport, req->id.idiag_src[0],
+ req->id.idiag_sport, req->id.idiag_if);
+ }
+#if IS_ENABLED(CONFIG_IPV6)
+ else if (req->sdiag_family == AF_INET6) {
+ sk = inet6_lookup(&init_net, 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 {
+ goto out_nosk;
+ }
+
+ err = -ENOENT;
+ if (sk == NULL)
+ goto out_nosk;
+
+ err = sock_diag_check_cookie(sk, req->id.idiag_cookie);
+ if (err)
+ goto out;
+
+ err = -ENOMEM;
+ rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) +
+ sizeof(struct inet_diag_meminfo) +
+ sizeof(struct tcp_info) + 64)),
+ GFP_KERNEL);
+ if (!rep)
+ goto out;
+
+ err = sk_diag_fill(sk, rep, req,
+ NETLINK_CB(in_skb).pid,
+ nlh->nlmsg_seq, 0, nlh);
+ if (err < 0) {
+ WARN_ON(err == -EMSGSIZE);
+ kfree_skb(rep);
+ goto out;
+ }
+ err = netlink_unicast(sock_diag_nlsk, 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);
+ }
+out_nosk:
+ return err;
+}
+EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk);
+
+static int inet_diag_get_exact(struct sk_buff *in_skb,
+ const struct nlmsghdr *nlh,
+ struct inet_diag_req_v2 *req)
+{
+ const struct inet_diag_handler *handler;
+ int err;
+
+ handler = inet_diag_lock_handler(req->sdiag_protocol);
+ if (IS_ERR(handler))
+ err = PTR_ERR(handler);
+ else
+ err = handler->dump_one(in_skb, nlh, req);
+ inet_diag_unlock_handler(handler);
+
+ return err;
+}
+
+static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits)
+{
+ int words = bits >> 5;
+
+ bits &= 0x1f;
+
+ if (words) {
+ if (memcmp(a1, a2, words << 2))
+ return 0;
+ }
+ if (bits) {
+ __be32 w1, w2;
+ __be32 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 struct nlattr *_bc,
+ const struct inet_diag_entry *entry)
+{
+ const void *bc = nla_data(_bc);
+ int len = nla_len(_bc);
+
+ 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->sport <= 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;
+ __be32 *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 (op->code == INET_DIAG_BC_S_COND)
+ addr = entry->saddr;
+ else
+ addr = entry->daddr;
+
+ if (cond->family != AF_UNSPEC &&
+ cond->family != entry->family) {
+ 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 (cond->prefix_len == 0)
+ break;
+ if (bitstring_match(addr, 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;
+}
+
+int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk)
+{
+ struct inet_diag_entry entry;
+ struct inet_sock *inet = inet_sk(sk);
+
+ if (bc == NULL)
+ return 1;
+
+ entry.family = sk->sk_family;
+#if IS_ENABLED(CONFIG_IPV6)
+ 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->inet_rcv_saddr;
+ entry.daddr = &inet->inet_daddr;
+ }
+ entry.sport = inet->inet_num;
+ entry.dport = ntohs(inet->inet_dport);
+ entry.userlocks = sk->sk_userlocks;
+
+ return inet_diag_bc_run(bc, &entry);
+}
+EXPORT_SYMBOL_GPL(inet_diag_bc_sk);
+
+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 || op->yes & 3)
+ return 0;
+ len -= op->yes;
+ bc += op->yes;
+ }
+ return 0;
+}
+
+/* Validate an inet_diag_hostcond. */
+static bool valid_hostcond(const struct inet_diag_bc_op *op, int len,
+ int *min_len)
+{
+ int addr_len;
+ struct inet_diag_hostcond *cond;
+
+ /* Check hostcond space. */
+ *min_len += sizeof(struct inet_diag_hostcond);
+ if (len < *min_len)
+ return false;
+ cond = (struct inet_diag_hostcond *)(op + 1);
+
+ /* Check address family and address length. */
+ switch (cond->family) {
+ case AF_UNSPEC:
+ addr_len = 0;
+ break;
+ case AF_INET:
+ addr_len = sizeof(struct in_addr);
+ break;
+ case AF_INET6:
+ addr_len = sizeof(struct in6_addr);
+ break;
+ default:
+ return false;
+ }
+ *min_len += addr_len;
+ if (len < *min_len)
+ return false;
+
+ /* Check prefix length (in bits) vs address length (in bytes). */
+ if (cond->prefix_len > 8 * addr_len)
+ return false;
+
+ return true;
+}
+
+/* Validate a port comparison operator. */
+static inline bool valid_port_comparison(const struct inet_diag_bc_op *op,
+ int len, int *min_len)
+{
+ /* Port comparisons put the port in a follow-on inet_diag_bc_op. */
+ *min_len += sizeof(struct inet_diag_bc_op);
+ if (len < *min_len)
+ return false;
+ return true;
+}
+
+static int inet_diag_bc_audit(const void *bytecode, int bytecode_len)
+{
+ const void *bc = bytecode;
+ int len = bytecode_len;
+
+ while (len > 0) {
+ const struct inet_diag_bc_op *op = bc;
+ int min_len = sizeof(struct inet_diag_bc_op);
+
+//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_S_COND:
+ case INET_DIAG_BC_D_COND:
+ if (!valid_hostcond(bc, len, &min_len))
+ return -EINVAL;
+ break;
+ 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 (!valid_port_comparison(bc, len, &min_len))
+ return -EINVAL;
+ break;
+ case INET_DIAG_BC_AUTO:
+ case INET_DIAG_BC_JMP:
+ case INET_DIAG_BC_NOP:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (op->code != INET_DIAG_BC_NOP) {
+ if (op->no < min_len || op->no > len + 4 || op->no & 3)
+ return -EINVAL;
+ if (op->no < len &&
+ !valid_cc(bytecode, bytecode_len, len - op->no))
+ return -EINVAL;
+ }
+
+ if (op->yes < min_len || op->yes > len + 4 || op->yes & 3)
+ return -EINVAL;
+ bc += op->yes;
+ len -= op->yes;
+ }
+ return len == 0 ? 0 : -EINVAL;
+}
+
+static int inet_csk_diag_dump(struct sock *sk,
+ struct sk_buff *skb,
+ struct netlink_callback *cb,
+ struct inet_diag_req_v2 *r,
+ const struct nlattr *bc)
+{
+ if (!inet_diag_bc_sk(bc, sk))
+ return 0;
+
+ return inet_csk_diag_fill(sk, skb, r,
+ NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
+}
+
+static int inet_twsk_diag_dump(struct inet_timewait_sock *tw,
+ struct sk_buff *skb,
+ struct netlink_callback *cb,
+ struct inet_diag_req_v2 *r,
+ const struct nlattr *bc)
+{
+ if (bc != NULL) {
+ struct inet_diag_entry entry;
+
+ entry.family = tw->tw_family;
+#if IS_ENABLED(CONFIG_IPV6)
+ if (tw->tw_family == AF_INET6) {
+ struct inet6_timewait_sock *tw6 =
+ inet6_twsk((struct sock *)tw);
+ entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32;
+ entry.daddr = tw6->tw_v6_daddr.s6_addr32;
+ } else
+#endif
+ {
+ entry.saddr = &tw->tw_rcv_saddr;
+ entry.daddr = &tw->tw_daddr;
+ }
+ entry.sport = tw->tw_num;
+ entry.dport = ntohs(tw->tw_dport);
+ entry.userlocks = 0;
+
+ if (!inet_diag_bc_run(bc, &entry))
+ return 0;
+ }
+
+ return inet_twsk_diag_fill(tw, skb, r,
+ NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
+}
+
+/* Get the IPv4, IPv6, or IPv4-mapped-IPv6 local and remote addresses
+ * from a request_sock. For IPv4-mapped-IPv6 we must map IPv4 to IPv6.
+ */
+static inline void inet_diag_req_addrs(const struct sock *sk,
+ const struct request_sock *req,
+ struct inet_diag_entry *entry)
+{
+ struct inet_request_sock *ireq = inet_rsk(req);
+
+#if IS_ENABLED(CONFIG_IPV6)
+ if (sk->sk_family == AF_INET6) {
+ if (req->rsk_ops->family == AF_INET6) {
+ entry->saddr = inet6_rsk(req)->loc_addr.s6_addr32;
+ entry->daddr = inet6_rsk(req)->rmt_addr.s6_addr32;
+ } else if (req->rsk_ops->family == AF_INET) {
+ ipv6_addr_set_v4mapped(ireq->loc_addr,
+ &entry->saddr_storage);
+ ipv6_addr_set_v4mapped(ireq->rmt_addr,
+ &entry->daddr_storage);
+ entry->saddr = entry->saddr_storage.s6_addr32;
+ entry->daddr = entry->daddr_storage.s6_addr32;
+ }
+ } else
+#endif
+ {
+ entry->saddr = &ireq->loc_addr;
+ entry->daddr = &ireq->rmt_addr;
+ }
+}
+
+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_pointer(skb);
+ 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;
+ sock_diag_save_cookie(req, r->id.idiag_cookie);
+
+ tmo = req->expires - jiffies;
+ if (tmo < 0)
+ tmo = 0;
+
+ r->id.idiag_sport = inet->inet_sport;
+ r->id.idiag_dport = ireq->rmt_port;
+
+ memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src));
+ memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst));
+
+ 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 IS_ENABLED(CONFIG_IPV6)
+ if (r->idiag_family == AF_INET6) {
+ struct inet_diag_entry entry;
+ inet_diag_req_addrs(sk, req, &entry);
+ memcpy(r->id.idiag_src, entry.saddr, sizeof(struct in6_addr));
+ memcpy(r->id.idiag_dst, entry.daddr, sizeof(struct in6_addr));
+ }
+#endif
+ nlh->nlmsg_len = skb_tail_pointer(skb) - b;
+
+ return skb->len;
+
+nlmsg_failure:
+ nlmsg_trim(skb, b);
+ return -1;
+}
+
+static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk,
+ struct netlink_callback *cb,
+ struct inet_diag_req_v2 *r,
+ const struct nlattr *bc)
+{
+ struct inet_diag_entry entry;
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ struct listen_sock *lopt;
+ 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 (bc != NULL) {
+ entry.sport = inet->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) {
+ inet_diag_req_addrs(sk, req, &entry);
+ entry.dport = ntohs(ireq->rmt_port);
+
+ if (!inet_diag_bc_run(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;
+}
+
+void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb,
+ struct netlink_callback *cb, struct inet_diag_req_v2 *r, struct nlattr *bc)
+{
+ int i, num;
+ int s_i, s_num;
+
+ 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;
+
+ for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
+ struct sock *sk;
+ struct hlist_nulls_node *node;
+ struct inet_listen_hashbucket *ilb;
+
+ num = 0;
+ ilb = &hashinfo->listening_hash[i];
+ spin_lock_bh(&ilb->lock);
+ sk_nulls_for_each(sk, node, &ilb->head) {
+ struct inet_sock *inet = inet_sk(sk);
+
+ if (num < s_num) {
+ num++;
+ continue;
+ }
+
+ if (r->sdiag_family != AF_UNSPEC &&
+ sk->sk_family != r->sdiag_family)
+ goto next_listen;
+
+ if (r->id.idiag_sport != inet->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_csk_diag_dump(sk, skb, cb, r, bc) < 0) {
+ spin_unlock_bh(&ilb->lock);
+ goto done;
+ }
+
+syn_recv:
+ if (!(r->idiag_states & TCPF_SYN_RECV))
+ goto next_listen;
+
+ if (inet_diag_dump_reqs(skb, sk, cb, r, bc) < 0) {
+ spin_unlock_bh(&ilb->lock);
+ goto done;
+ }
+
+next_listen:
+ cb->args[3] = 0;
+ cb->args[4] = 0;
+ ++num;
+ }
+ spin_unlock_bh(&ilb->lock);
+
+ s_num = 0;
+ cb->args[3] = 0;
+ cb->args[4] = 0;
+ }
+skip_listen_ht:
+ cb->args[0] = 1;
+ s_i = num = s_num = 0;
+ }
+
+ if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV)))
+ goto out;
+
+ for (i = s_i; i <= hashinfo->ehash_mask; i++) {
+ struct inet_ehash_bucket *head = &hashinfo->ehash[i];
+ spinlock_t *lock = inet_ehash_lockp(hashinfo, i);
+ struct sock *sk;
+ struct hlist_nulls_node *node;
+
+ num = 0;
+
+ if (hlist_nulls_empty(&head->chain) &&
+ hlist_nulls_empty(&head->twchain))
+ continue;
+
+ if (i > s_i)
+ s_num = 0;
+
+ spin_lock_bh(lock);
+ sk_nulls_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->sdiag_family != AF_UNSPEC &&
+ sk->sk_family != r->sdiag_family)
+ goto next_normal;
+ if (r->id.idiag_sport != inet->inet_sport &&
+ r->id.idiag_sport)
+ goto next_normal;
+ if (r->id.idiag_dport != inet->inet_dport &&
+ r->id.idiag_dport)
+ goto next_normal;
+ if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) {
+ spin_unlock_bh(lock);
+ goto done;
+ }
+next_normal:
+ ++num;
+ }
+
+ if (r->idiag_states & (TCPF_TIME_WAIT | TCPF_FIN_WAIT2)) {
+ struct inet_timewait_sock *tw;
+
+ inet_twsk_for_each(tw, node,
+ &head->twchain) {
+
+ if (num < s_num)
+ goto next_dying;
+ if (!(r->idiag_states & (1 << tw->tw_substate)))
+ goto next_dying;
+ if (r->sdiag_family != AF_UNSPEC &&
+ tw->tw_family != r->sdiag_family)
+ goto next_dying;
+ if (r->id.idiag_sport != tw->tw_sport &&
+ r->id.idiag_sport)
+ goto next_dying;
+ if (r->id.idiag_dport != tw->tw_dport &&
+ r->id.idiag_dport)
+ goto next_dying;
+ if (inet_twsk_diag_dump(tw, skb, cb, r, bc) < 0) {
+ spin_unlock_bh(lock);
+ goto done;
+ }
+next_dying:
+ ++num;
+ }
+ }
+ spin_unlock_bh(lock);
+ }
+
+done:
+ cb->args[1] = i;
+ cb->args[2] = num;
+out:
+ ;
+}
+EXPORT_SYMBOL_GPL(inet_diag_dump_icsk);
+
+static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
+ struct inet_diag_req_v2 *r, struct nlattr *bc)
+{
+ const struct inet_diag_handler *handler;
+ int err = 0;
+
+ handler = inet_diag_lock_handler(r->sdiag_protocol);
+ if (!IS_ERR(handler))
+ handler->dump(skb, cb, r, bc);
+ else
+ err = PTR_ERR(handler);
+ inet_diag_unlock_handler(handler);
+
+ return err ? : skb->len;
+}
+
+static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct nlattr *bc = NULL;
+ int hdrlen = sizeof(struct inet_diag_req_v2);
+
+ if (nlmsg_attrlen(cb->nlh, hdrlen))
+ bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
+
+ return __inet_diag_dump(skb, cb, (struct inet_diag_req_v2 *)NLMSG_DATA(cb->nlh), bc);
+}
+
+static inline int inet_diag_type2proto(int type)
+{
+ switch (type) {
+ case TCPDIAG_GETSOCK:
+ return IPPROTO_TCP;
+ case DCCPDIAG_GETSOCK:
+ return IPPROTO_DCCP;
+ default:
+ return 0;
+ }
+}
+
+static int inet_diag_dump_compat(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct inet_diag_req *rc = NLMSG_DATA(cb->nlh);
+ struct inet_diag_req_v2 req;
+ struct nlattr *bc = NULL;
+ int hdrlen = sizeof(struct inet_diag_req);
+
+ req.sdiag_family = AF_UNSPEC; /* compatibility */
+ req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type);
+ req.idiag_ext = rc->idiag_ext;
+ req.idiag_states = rc->idiag_states;
+ req.id = rc->id;
+
+ if (nlmsg_attrlen(cb->nlh, hdrlen))
+ bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
+
+ return __inet_diag_dump(skb, cb, &req, bc);
+}
+
+static int inet_diag_get_exact_compat(struct sk_buff *in_skb,
+ const struct nlmsghdr *nlh)
+{
+ struct inet_diag_req *rc = NLMSG_DATA(nlh);
+ struct inet_diag_req_v2 req;
+
+ req.sdiag_family = rc->idiag_family;
+ req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type);
+ req.idiag_ext = rc->idiag_ext;
+ req.idiag_states = rc->idiag_states;
+ req.id = rc->id;
+
+ return inet_diag_get_exact(in_skb, nlh, &req);
+}
+
+static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh)
+{
+ int hdrlen = sizeof(struct inet_diag_req);
+
+ if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX ||
+ nlmsg_len(nlh) < hdrlen)
+ return -EINVAL;
+
+ if (nlh->nlmsg_flags & NLM_F_DUMP) {
+ if (nlmsg_attrlen(nlh, hdrlen)) {
+ struct nlattr *attr;
+
+ attr = nlmsg_find_attr(nlh, hdrlen,
+ INET_DIAG_REQ_BYTECODE);
+ if (attr == NULL ||
+ nla_len(attr) < sizeof(struct inet_diag_bc_op) ||
+ inet_diag_bc_audit(nla_data(attr), nla_len(attr)))
+ return -EINVAL;
+ }
+ {
+ struct netlink_dump_control c = {
+ .dump = inet_diag_dump_compat,
+ };
+ return netlink_dump_start(sock_diag_nlsk, skb, nlh, &c);
+ }
+ }
+
+ return inet_diag_get_exact_compat(skb, nlh);
+}
+
+static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h)
+{
+ int hdrlen = sizeof(struct inet_diag_req_v2);
+
+ if (nlmsg_len(h) < hdrlen)
+ return -EINVAL;
+
+ if (h->nlmsg_flags & NLM_F_DUMP) {
+ if (nlmsg_attrlen(h, hdrlen)) {
+ struct nlattr *attr;
+ attr = nlmsg_find_attr(h, hdrlen,
+ INET_DIAG_REQ_BYTECODE);
+ if (attr == NULL ||
+ nla_len(attr) < sizeof(struct inet_diag_bc_op) ||
+ inet_diag_bc_audit(nla_data(attr), nla_len(attr)))
+ return -EINVAL;
+ }
+ {
+ struct netlink_dump_control c = {
+ .dump = inet_diag_dump,
+ };
+ return netlink_dump_start(sock_diag_nlsk, skb, h, &c);
+ }
+ }
+
+ return inet_diag_get_exact(skb, h, (struct inet_diag_req_v2 *)NLMSG_DATA(h));
+}
+
+static struct sock_diag_handler inet_diag_handler = {
+ .family = AF_INET,
+ .dump = inet_diag_handler_dump,
+};
+
+static struct sock_diag_handler inet6_diag_handler = {
+ .family = AF_INET6,
+ .dump = inet_diag_handler_dump,
+};
+
+int inet_diag_register(const struct inet_diag_handler *h)
+{
+ const __u16 type = h->idiag_type;
+ int err = -EINVAL;
+
+ if (type >= IPPROTO_MAX)
+ goto out;
+
+ mutex_lock(&inet_diag_table_mutex);
+ err = -EEXIST;
+ if (inet_diag_table[type] == NULL) {
+ inet_diag_table[type] = h;
+ err = 0;
+ }
+ mutex_unlock(&inet_diag_table_mutex);
+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 >= IPPROTO_MAX)
+ return;
+
+ mutex_lock(&inet_diag_table_mutex);
+ inet_diag_table[type] = NULL;
+ mutex_unlock(&inet_diag_table_mutex);
+}
+EXPORT_SYMBOL_GPL(inet_diag_unregister);
+
+static int __init inet_diag_init(void)
+{
+ const int inet_diag_table_size = (IPPROTO_MAX *
+ sizeof(struct inet_diag_handler *));
+ int err = -ENOMEM;
+
+ inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL);
+ if (!inet_diag_table)
+ goto out;
+
+ err = sock_diag_register(&inet_diag_handler);
+ if (err)
+ goto out_free_nl;
+
+ err = sock_diag_register(&inet6_diag_handler);
+ if (err)
+ goto out_free_inet;
+
+ sock_diag_register_inet_compat(inet_diag_rcv_msg_compat);
+out:
+ return err;
+
+out_free_inet:
+ sock_diag_unregister(&inet_diag_handler);
+out_free_nl:
+ kfree(inet_diag_table);
+ goto out;
+}
+
+static void __exit inet_diag_exit(void)
+{
+ sock_diag_unregister(&inet6_diag_handler);
+ sock_diag_unregister(&inet_diag_handler);
+ sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat);
+ kfree(inet_diag_table);
+}
+
+module_init(inet_diag_init);
+module_exit(inet_diag_exit);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */);
+MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */);