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-rw-r--r--net/ipv4/tcp_diag.c784
1 files changed, 24 insertions, 760 deletions
diff --git a/net/ipv4/tcp_diag.c b/net/ipv4/tcp_diag.c
index f66945cb158..c148c108188 100644
--- a/net/ipv4/tcp_diag.c
+++ b/net/ipv4/tcp_diag.c
@@ -1,5 +1,5 @@
/*
- * tcp_diag.c Module for monitoring TCP sockets.
+ * tcp_diag.c Module for monitoring TCP transport protocols sockets.
*
* Version: $Id: tcp_diag.c,v 1.3 2002/02/01 22:01:04 davem Exp $
*
@@ -12,779 +12,43 @@
*/
#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 <linux/inet.h>
-#include <linux/stddef.h>
-
-#include <linux/tcp_diag.h>
-struct tcpdiag_entry
-{
- u32 *saddr;
- u32 *daddr;
- u16 sport;
- u16 dport;
- u16 family;
- u16 userlocks;
-};
+#include <linux/module.h>
+#include <linux/inet_diag.h>
-static struct sock *tcpnl;
+#include <linux/tcp.h>
-#define TCPDIAG_PUT(skb, attrtype, attrlen) \
- RTA_DATA(__RTA_PUT(skb, attrtype, attrlen))
+#include <net/tcp.h>
-static int tcpdiag_fill(struct sk_buff *skb, struct sock *sk,
- int ext, u32 pid, u32 seq, u16 nlmsg_flags)
+static void tcp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
+ void *_info)
{
- struct inet_sock *inet = inet_sk(sk);
- struct tcp_sock *tp = tcp_sk(sk);
- struct tcpdiagmsg *r;
- struct nlmsghdr *nlh;
- struct tcp_info *info = NULL;
- struct tcpdiag_meminfo *minfo = NULL;
- unsigned char *b = skb->tail;
-
- nlh = NLMSG_PUT(skb, pid, seq, TCPDIAG_GETSOCK, sizeof(*r));
- nlh->nlmsg_flags = nlmsg_flags;
- r = NLMSG_DATA(nlh);
- if (sk->sk_state != TCP_TIME_WAIT) {
- if (ext & (1<<(TCPDIAG_MEMINFO-1)))
- minfo = TCPDIAG_PUT(skb, TCPDIAG_MEMINFO, sizeof(*minfo));
- if (ext & (1<<(TCPDIAG_INFO-1)))
- info = TCPDIAG_PUT(skb, TCPDIAG_INFO, sizeof(*info));
-
- if (ext & (1<<(TCPDIAG_CONG-1))) {
- size_t len = strlen(tp->ca_ops->name);
- strcpy(TCPDIAG_PUT(skb, TCPDIAG_CONG, len+1),
- tp->ca_ops->name);
- }
- }
- r->tcpdiag_family = sk->sk_family;
- r->tcpdiag_state = sk->sk_state;
- r->tcpdiag_timer = 0;
- r->tcpdiag_retrans = 0;
-
- r->id.tcpdiag_if = sk->sk_bound_dev_if;
- r->id.tcpdiag_cookie[0] = (u32)(unsigned long)sk;
- r->id.tcpdiag_cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1);
-
- if (r->tcpdiag_state == TCP_TIME_WAIT) {
- struct tcp_tw_bucket *tw = (struct tcp_tw_bucket*)sk;
- long tmo = tw->tw_ttd - jiffies;
- if (tmo < 0)
- tmo = 0;
-
- r->id.tcpdiag_sport = tw->tw_sport;
- r->id.tcpdiag_dport = tw->tw_dport;
- r->id.tcpdiag_src[0] = tw->tw_rcv_saddr;
- r->id.tcpdiag_dst[0] = tw->tw_daddr;
- r->tcpdiag_state = tw->tw_substate;
- r->tcpdiag_timer = 3;
- r->tcpdiag_expires = (tmo*1000+HZ-1)/HZ;
- r->tcpdiag_rqueue = 0;
- r->tcpdiag_wqueue = 0;
- r->tcpdiag_uid = 0;
- r->tcpdiag_inode = 0;
-#ifdef CONFIG_IP_TCPDIAG_IPV6
- if (r->tcpdiag_family == AF_INET6) {
- ipv6_addr_copy((struct in6_addr *)r->id.tcpdiag_src,
- &tw->tw_v6_rcv_saddr);
- ipv6_addr_copy((struct in6_addr *)r->id.tcpdiag_dst,
- &tw->tw_v6_daddr);
- }
-#endif
- nlh->nlmsg_len = skb->tail - b;
- return skb->len;
- }
-
- r->id.tcpdiag_sport = inet->sport;
- r->id.tcpdiag_dport = inet->dport;
- r->id.tcpdiag_src[0] = inet->rcv_saddr;
- r->id.tcpdiag_dst[0] = inet->daddr;
-
-#ifdef CONFIG_IP_TCPDIAG_IPV6
- if (r->tcpdiag_family == AF_INET6) {
- struct ipv6_pinfo *np = inet6_sk(sk);
-
- ipv6_addr_copy((struct in6_addr *)r->id.tcpdiag_src,
- &np->rcv_saddr);
- ipv6_addr_copy((struct in6_addr *)r->id.tcpdiag_dst,
- &np->daddr);
- }
-#endif
-
-#define EXPIRES_IN_MS(tmo) ((tmo-jiffies)*1000+HZ-1)/HZ
-
- if (tp->pending == TCP_TIME_RETRANS) {
- r->tcpdiag_timer = 1;
- r->tcpdiag_retrans = tp->retransmits;
- r->tcpdiag_expires = EXPIRES_IN_MS(tp->timeout);
- } else if (tp->pending == TCP_TIME_PROBE0) {
- r->tcpdiag_timer = 4;
- r->tcpdiag_retrans = tp->probes_out;
- r->tcpdiag_expires = EXPIRES_IN_MS(tp->timeout);
- } else if (timer_pending(&sk->sk_timer)) {
- r->tcpdiag_timer = 2;
- r->tcpdiag_retrans = tp->probes_out;
- r->tcpdiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
- } else {
- r->tcpdiag_timer = 0;
- r->tcpdiag_expires = 0;
- }
-#undef EXPIRES_IN_MS
+ const struct tcp_sock *tp = tcp_sk(sk);
+ struct tcp_info *info = _info;
- r->tcpdiag_rqueue = tp->rcv_nxt - tp->copied_seq;
- r->tcpdiag_wqueue = tp->write_seq - tp->snd_una;
- r->tcpdiag_uid = sock_i_uid(sk);
- r->tcpdiag_inode = sock_i_ino(sk);
-
- if (minfo) {
- minfo->tcpdiag_rmem = atomic_read(&sk->sk_rmem_alloc);
- minfo->tcpdiag_wmem = sk->sk_wmem_queued;
- minfo->tcpdiag_fmem = sk->sk_forward_alloc;
- minfo->tcpdiag_tmem = atomic_read(&sk->sk_wmem_alloc);
- }
-
- if (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);
-
- if (sk->sk_state < TCP_TIME_WAIT && tp->ca_ops->get_info)
- tp->ca_ops->get_info(tp, ext, skb);
-
- nlh->nlmsg_len = skb->tail - b;
- return skb->len;
-
-rtattr_failure:
-nlmsg_failure:
- skb_trim(skb, b - skb->data);
- return -1;
-}
-
-extern struct sock *tcp_v4_lookup(u32 saddr, u16 sport, u32 daddr, u16 dport,
- int dif);
-#ifdef CONFIG_IP_TCPDIAG_IPV6
-extern struct sock *tcp_v6_lookup(struct in6_addr *saddr, u16 sport,
- struct in6_addr *daddr, u16 dport,
- int dif);
-#else
-static inline struct sock *tcp_v6_lookup(struct in6_addr *saddr, u16 sport,
- struct in6_addr *daddr, u16 dport,
- int dif)
-{
- return NULL;
-}
-#endif
-
-static int tcpdiag_get_exact(struct sk_buff *in_skb, const struct nlmsghdr *nlh)
-{
- int err;
- struct sock *sk;
- struct tcpdiagreq *req = NLMSG_DATA(nlh);
- struct sk_buff *rep;
-
- if (req->tcpdiag_family == AF_INET) {
- sk = tcp_v4_lookup(req->id.tcpdiag_dst[0], req->id.tcpdiag_dport,
- req->id.tcpdiag_src[0], req->id.tcpdiag_sport,
- req->id.tcpdiag_if);
- }
-#ifdef CONFIG_IP_TCPDIAG_IPV6
- else if (req->tcpdiag_family == AF_INET6) {
- sk = tcp_v6_lookup((struct in6_addr*)req->id.tcpdiag_dst, req->id.tcpdiag_dport,
- (struct in6_addr*)req->id.tcpdiag_src, req->id.tcpdiag_sport,
- req->id.tcpdiag_if);
- }
-#endif
- else {
- return -EINVAL;
- }
-
- if (sk == NULL)
- return -ENOENT;
-
- err = -ESTALE;
- if ((req->id.tcpdiag_cookie[0] != TCPDIAG_NOCOOKIE ||
- req->id.tcpdiag_cookie[1] != TCPDIAG_NOCOOKIE) &&
- ((u32)(unsigned long)sk != req->id.tcpdiag_cookie[0] ||
- (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.tcpdiag_cookie[1]))
- goto out;
-
- err = -ENOMEM;
- rep = alloc_skb(NLMSG_SPACE(sizeof(struct tcpdiagmsg)+
- sizeof(struct tcpdiag_meminfo)+
- sizeof(struct tcp_info)+64), GFP_KERNEL);
- if (!rep)
- goto out;
-
- if (tcpdiag_fill(rep, sk, req->tcpdiag_ext,
- NETLINK_CB(in_skb).pid,
- nlh->nlmsg_seq, 0) <= 0)
- BUG();
-
- err = netlink_unicast(tcpnl, rep, NETLINK_CB(in_skb).pid, MSG_DONTWAIT);
- if (err > 0)
- err = 0;
-
-out:
- if (sk) {
- if (sk->sk_state == TCP_TIME_WAIT)
- tcp_tw_put((struct tcp_tw_bucket*)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 tcpdiag_bc_run(const void *bc, int len,
- const struct tcpdiag_entry *entry)
-{
- while (len > 0) {
- int yes = 1;
- const struct tcpdiag_bc_op *op = bc;
-
- switch (op->code) {
- case TCPDIAG_BC_NOP:
- break;
- case TCPDIAG_BC_JMP:
- yes = 0;
- break;
- case TCPDIAG_BC_S_GE:
- yes = entry->sport >= op[1].no;
- break;
- case TCPDIAG_BC_S_LE:
- yes = entry->dport <= op[1].no;
- break;
- case TCPDIAG_BC_D_GE:
- yes = entry->dport >= op[1].no;
- break;
- case TCPDIAG_BC_D_LE:
- yes = entry->dport <= op[1].no;
- break;
- case TCPDIAG_BC_AUTO:
- yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
- break;
- case TCPDIAG_BC_S_COND:
- case TCPDIAG_BC_D_COND:
- {
- struct tcpdiag_hostcond *cond = (struct tcpdiag_hostcond*)(op+1);
- u32 *addr;
-
- if (cond->port != -1 &&
- cond->port != (op->code == TCPDIAG_BC_S_COND ?
- entry->sport : entry->dport)) {
- yes = 0;
- break;
- }
-
- if (cond->prefix_len == 0)
- break;
-
- if (op->code == TCPDIAG_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 tcpdiag_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 tcpdiag_bc_audit(const void *bytecode, int bytecode_len)
-{
- const unsigned char *bc = bytecode;
- int len = bytecode_len;
-
- while (len > 0) {
- struct tcpdiag_bc_op *op = (struct tcpdiag_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 TCPDIAG_BC_AUTO:
- case TCPDIAG_BC_S_COND:
- case TCPDIAG_BC_D_COND:
- case TCPDIAG_BC_S_GE:
- case TCPDIAG_BC_S_LE:
- case TCPDIAG_BC_D_GE:
- case TCPDIAG_BC_D_LE:
- if (op->yes < 4 || op->yes > len+4)
- return -EINVAL;
- case TCPDIAG_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 TCPDIAG_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 tcpdiag_dump_sock(struct sk_buff *skb, struct sock *sk,
- struct netlink_callback *cb)
-{
- struct tcpdiagreq *r = NLMSG_DATA(cb->nlh);
-
- if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) {
- struct tcpdiag_entry entry;
- struct rtattr *bc = (struct rtattr *)(r + 1);
- struct inet_sock *inet = inet_sk(sk);
-
- entry.family = sk->sk_family;
-#ifdef CONFIG_IP_TCPDIAG_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->rcv_saddr;
- entry.daddr = &inet->daddr;
- }
- entry.sport = inet->num;
- entry.dport = ntohs(inet->dport);
- entry.userlocks = sk->sk_userlocks;
-
- if (!tcpdiag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry))
- return 0;
- }
-
- return tcpdiag_fill(skb, sk, r->tcpdiag_ext, NETLINK_CB(cb->skb).pid,
- cb->nlh->nlmsg_seq, NLM_F_MULTI);
}
-static int tcpdiag_fill_req(struct sk_buff *skb, struct sock *sk,
- struct request_sock *req,
- u32 pid, u32 seq)
-{
- const struct inet_request_sock *ireq = inet_rsk(req);
- struct inet_sock *inet = inet_sk(sk);
- unsigned char *b = skb->tail;
- struct tcpdiagmsg *r;
- struct nlmsghdr *nlh;
- long tmo;
-
- nlh = NLMSG_PUT(skb, pid, seq, TCPDIAG_GETSOCK, sizeof(*r));
- nlh->nlmsg_flags = NLM_F_MULTI;
- r = NLMSG_DATA(nlh);
-
- r->tcpdiag_family = sk->sk_family;
- r->tcpdiag_state = TCP_SYN_RECV;
- r->tcpdiag_timer = 1;
- r->tcpdiag_retrans = req->retrans;
-
- r->id.tcpdiag_if = sk->sk_bound_dev_if;
- r->id.tcpdiag_cookie[0] = (u32)(unsigned long)req;
- r->id.tcpdiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1);
-
- tmo = req->expires - jiffies;
- if (tmo < 0)
- tmo = 0;
-
- r->id.tcpdiag_sport = inet->sport;
- r->id.tcpdiag_dport = ireq->rmt_port;
- r->id.tcpdiag_src[0] = ireq->loc_addr;
- r->id.tcpdiag_dst[0] = ireq->rmt_addr;
- r->tcpdiag_expires = jiffies_to_msecs(tmo),
- r->tcpdiag_rqueue = 0;
- r->tcpdiag_wqueue = 0;
- r->tcpdiag_uid = sock_i_uid(sk);
- r->tcpdiag_inode = 0;
-#ifdef CONFIG_IP_TCPDIAG_IPV6
- if (r->tcpdiag_family == AF_INET6) {
- ipv6_addr_copy((struct in6_addr *)r->id.tcpdiag_src,
- &tcp6_rsk(req)->loc_addr);
- ipv6_addr_copy((struct in6_addr *)r->id.tcpdiag_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 tcpdiag_dump_reqs(struct sk_buff *skb, struct sock *sk,
- struct netlink_callback *cb)
-{
- struct tcpdiag_entry entry;
- struct tcpdiagreq *r = NLMSG_DATA(cb->nlh);
- struct tcp_sock *tp = tcp_sk(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(&tp->accept_queue.syn_wait_lock);
-
- lopt = tp->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 < TCP_SYNQ_HSIZE; 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.tcpdiag_dport != ireq->rmt_port &&
- r->id.tcpdiag_dport)
- continue;
-
- if (bc) {
- entry.saddr =
-#ifdef CONFIG_IP_TCPDIAG_IPV6
- (entry.family == AF_INET6) ?
- tcp6_rsk(req)->loc_addr.s6_addr32 :
-#endif
- &ireq->loc_addr;
- entry.daddr =
-#ifdef CONFIG_IP_TCPDIAG_IPV6
- (entry.family == AF_INET6) ?
- tcp6_rsk(req)->rmt_addr.s6_addr32 :
-#endif
- &ireq->rmt_addr;
- entry.dport = ntohs(ireq->rmt_port);
-
- if (!tcpdiag_bc_run(RTA_DATA(bc),
- RTA_PAYLOAD(bc), &entry))
- continue;
- }
-
- err = tcpdiag_fill_req(skb, sk, req,
- NETLINK_CB(cb->skb).pid,
- cb->nlh->nlmsg_seq);
- if (err < 0) {
- cb->args[3] = j + 1;
- cb->args[4] = reqnum;
- goto out;
- }
- }
-
- s_reqnum = 0;
- }
-
-out:
- read_unlock_bh(&tp->accept_queue.syn_wait_lock);
-
- return err;
-}
-
-static int tcpdiag_dump(struct sk_buff *skb, struct netlink_callback *cb)
-{
- int i, num;
- int s_i, s_num;
- struct tcpdiagreq *r = NLMSG_DATA(cb->nlh);
-
- s_i = cb->args[1];
- s_num = num = cb->args[2];
-
- if (cb->args[0] == 0) {
- if (!(r->tcpdiag_states&(TCPF_LISTEN|TCPF_SYN_RECV)))
- goto skip_listen_ht;
- tcp_listen_lock();
- for (i = s_i; i < TCP_LHTABLE_SIZE; i++) {
- struct sock *sk;
- struct hlist_node *node;
-
- num = 0;
- sk_for_each(sk, node, &tcp_listening_hash[i]) {
- struct inet_sock *inet = inet_sk(sk);
-
- if (num < s_num) {
- num++;
- continue;
- }
-
- if (r->id.tcpdiag_sport != inet->sport &&
- r->id.tcpdiag_sport)
- goto next_listen;
-
- if (!(r->tcpdiag_states&TCPF_LISTEN) ||
- r->id.tcpdiag_dport ||
- cb->args[3] > 0)
- goto syn_recv;
-
- if (tcpdiag_dump_sock(skb, sk, cb) < 0) {
- tcp_listen_unlock();
- goto done;
- }
-
-syn_recv:
- if (!(r->tcpdiag_states&TCPF_SYN_RECV))
- goto next_listen;
-
- if (tcpdiag_dump_reqs(skb, sk, cb) < 0) {
- tcp_listen_unlock();
- goto done;
- }
-
-next_listen:
- cb->args[3] = 0;
- cb->args[4] = 0;
- ++num;
- }
-
- s_num = 0;
- cb->args[3] = 0;
- cb->args[4] = 0;
- }
- tcp_listen_unlock();
-skip_listen_ht:
- cb->args[0] = 1;
- s_i = num = s_num = 0;
- }
-
- if (!(r->tcpdiag_states&~(TCPF_LISTEN|TCPF_SYN_RECV)))
- return skb->len;
-
- for (i = s_i; i < tcp_ehash_size; i++) {
- struct tcp_ehash_bucket *head = &tcp_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->tcpdiag_states & (1 << sk->sk_state)))
- goto next_normal;
- if (r->id.tcpdiag_sport != inet->sport &&
- r->id.tcpdiag_sport)
- goto next_normal;
- if (r->id.tcpdiag_dport != inet->dport && r->id.tcpdiag_dport)
- goto next_normal;
- if (tcpdiag_dump_sock(skb, sk, cb) < 0) {
- read_unlock_bh(&head->lock);
- goto done;
- }
-next_normal:
- ++num;
- }
-
- if (r->tcpdiag_states&TCPF_TIME_WAIT) {
- sk_for_each(sk, node,
- &tcp_ehash[i + tcp_ehash_size].chain) {
- struct inet_sock *inet = inet_sk(sk);
-
- if (num < s_num)
- goto next_dying;
- if (r->id.tcpdiag_sport != inet->sport &&
- r->id.tcpdiag_sport)
- goto next_dying;
- if (r->id.tcpdiag_dport != inet->dport &&
- r->id.tcpdiag_dport)
- goto next_dying;
- if (tcpdiag_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 tcpdiag_dump_done(struct netlink_callback *cb)
-{
- return 0;
-}
-
-
-static __inline__ int
-tcpdiag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
-{
- if (!(nlh->nlmsg_flags&NLM_F_REQUEST))
- return 0;
-
- if (nlh->nlmsg_type != TCPDIAG_GETSOCK)
- goto err_inval;
-
- if (NLMSG_LENGTH(sizeof(struct tcpdiagreq)) > skb->len)
- goto err_inval;
-
- if (nlh->nlmsg_flags&NLM_F_DUMP) {
- if (nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(struct tcpdiagreq))) {
- struct rtattr *rta = (struct rtattr*)(NLMSG_DATA(nlh) + sizeof(struct tcpdiagreq));
- if (rta->rta_type != TCPDIAG_REQ_BYTECODE ||
- rta->rta_len < 8 ||
- rta->rta_len > nlh->nlmsg_len - NLMSG_SPACE(sizeof(struct tcpdiagreq)))
- goto err_inval;
- if (tcpdiag_bc_audit(RTA_DATA(rta), RTA_PAYLOAD(rta)))
- goto err_inval;
- }
- return netlink_dump_start(tcpnl, skb, nlh,
- tcpdiag_dump,
- tcpdiag_dump_done);
- } else {
- return tcpdiag_get_exact(skb, nlh);
- }
-
-err_inval:
- return -EINVAL;
-}
-
-
-static inline void tcpdiag_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 = tcpdiag_rcv_msg(skb, nlh);
- if (err || nlh->nlmsg_flags & NLM_F_ACK)
- netlink_ack(skb, nlh, err);
- }
-}
-
-static void tcpdiag_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))) {
- tcpdiag_rcv_skb(skb);
- kfree_skb(skb);
- }
-}
+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 int __init tcpdiag_init(void)
+static int __init tcp_diag_init(void)
{
- tcpnl = netlink_kernel_create(NETLINK_TCPDIAG, tcpdiag_rcv);
- if (tcpnl == NULL)
- return -ENOMEM;
- return 0;
+ return inet_diag_register(&tcp_diag_handler);
}
-static void __exit tcpdiag_exit(void)
+static void __exit tcp_diag_exit(void)
{
- sock_release(tcpnl->sk_socket);
+ inet_diag_unregister(&tcp_diag_handler);
}
-module_init(tcpdiag_init);
-module_exit(tcpdiag_exit);
+module_init(tcp_diag_init);
+module_exit(tcp_diag_exit);
MODULE_LICENSE("GPL");
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-22 21:55:38 +0000