#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 <linux/tcp_diag.h>
-struct tcpdiag_entry
-{
- u32 *saddr;
- u32 *daddr;
- u16 sport;
- u16 dport;
- u16 family;
- u16 userlocks;
-};
-
static struct sock *tcpnl;
rta->rta_len = rtalen; \
RTA_DATA(rta); })
+/* Return information about state of tcp endpoint in API format. */
+void tcp_get_info(struct sock *sk, struct tcp_info *info)
+{
+ struct tcp_opt *tp = tcp_sk(sk);
+ u32 now = tcp_time_stamp;
+
+ memset(info, 0, sizeof(*info));
+
+ info->tcpi_state = sk->sk_state;
+ info->tcpi_ca_state = tp->ca_state;
+ info->tcpi_retransmits = tp->retransmits;
+ info->tcpi_probes = tp->probes_out;
+ info->tcpi_backoff = tp->backoff;
+
+ if (tp->tstamp_ok)
+ info->tcpi_options |= TCPI_OPT_TIMESTAMPS;
+ if (tp->sack_ok)
+ info->tcpi_options |= TCPI_OPT_SACK;
+ if (tp->wscale_ok) {
+ info->tcpi_options |= TCPI_OPT_WSCALE;
+ info->tcpi_snd_wscale = tp->snd_wscale;
+ info->tcpi_rcv_wscale = tp->rcv_wscale;
+ }
+
+ if (tp->ecn_flags&TCP_ECN_OK)
+ info->tcpi_options |= TCPI_OPT_ECN;
+
+ info->tcpi_rto = jiffies_to_usecs(tp->rto);
+ info->tcpi_ato = jiffies_to_usecs(tp->ack.ato);
+ info->tcpi_snd_mss = tp->mss_cache_std;
+ info->tcpi_rcv_mss = tp->ack.rcv_mss;
+
+ info->tcpi_unacked = tcp_get_pcount(&tp->packets_out);
+ info->tcpi_sacked = tcp_get_pcount(&tp->sacked_out);
+ info->tcpi_lost = tcp_get_pcount(&tp->lost_out);
+ info->tcpi_retrans = tcp_get_pcount(&tp->retrans_out);
+ info->tcpi_fackets = tcp_get_pcount(&tp->fackets_out);
+
+ info->tcpi_last_data_sent = jiffies_to_msecs(now - tp->lsndtime);
+ info->tcpi_last_data_recv = jiffies_to_msecs(now - tp->ack.lrcvtime);
+ info->tcpi_last_ack_recv = jiffies_to_msecs(now - tp->rcv_tstamp);
+
+ info->tcpi_pmtu = tp->pmtu_cookie;
+ info->tcpi_rcv_ssthresh = tp->rcv_ssthresh;
+ info->tcpi_rtt = jiffies_to_usecs(tp->srtt)>>3;
+ info->tcpi_rttvar = jiffies_to_usecs(tp->mdev)>>2;
+ info->tcpi_snd_ssthresh = tp->snd_ssthresh;
+ info->tcpi_snd_cwnd = tp->snd_cwnd;
+ info->tcpi_advmss = tp->advmss;
+ info->tcpi_reordering = tp->reordering;
+
+ info->tcpi_rcv_rtt = jiffies_to_usecs(tp->rcv_rtt_est.rtt)>>3;
+ info->tcpi_rcv_space = tp->rcvq_space.space;
+}
+
static int tcpdiag_fill(struct sk_buff *skb, struct sock *sk,
- int ext, u32 pid, u32 seq, u16 nlmsg_flags)
+ int ext, u32 pid, u32 seq)
{
struct inet_opt *inet = inet_sk(sk);
struct tcp_opt *tp = tcp_sk(sk);
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)))
r->tcpdiag_wqueue = 0;
r->tcpdiag_uid = 0;
r->tcpdiag_inode = 0;
-#ifdef CONFIG_IP_TCPDIAG_IPV6
+#ifdef CONFIG_IPV6
if (r->tcpdiag_family == AF_INET6) {
ipv6_addr_copy((struct in6_addr *)r->id.tcpdiag_src,
&tw->tw_v6_rcv_saddr);
r->id.tcpdiag_src[0] = inet->rcv_saddr;
r->id.tcpdiag_dst[0] = inet->daddr;
-#ifdef CONFIG_IP_TCPDIAG_IPV6
+#ifdef CONFIG_IPV6
if (r->tcpdiag_family == AF_INET6) {
struct ipv6_pinfo *np = inet6_sk(sk);
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_v4_lookup(u32 saddr, u16 sport, u32 daddr, u16 dport, int dif);
+#ifdef CONFIG_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)
req->id.tcpdiag_src[0], req->id.tcpdiag_sport,
req->id.tcpdiag_if);
}
-#ifdef CONFIG_IP_TCPDIAG_IPV6
+#ifdef CONFIG_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,
if (tcpdiag_fill(rep, sk, req->tcpdiag_ext,
NETLINK_CB(in_skb).pid,
- nlh->nlmsg_seq, 0) <= 0)
+ nlh->nlmsg_seq) <= 0)
BUG();
err = netlink_unicast(tcpnl, rep, NETLINK_CB(in_skb).pid, MSG_DONTWAIT);
}
-static int tcpdiag_bc_run(const void *bc, int len,
- const struct tcpdiag_entry *entry)
+static int tcpdiag_bc_run(const void *bc, int len, struct sock *sk)
{
while (len > 0) {
int yes = 1;
+ struct inet_opt *inet = inet_sk(sk);
const struct tcpdiag_bc_op *op = bc;
switch (op->code) {
yes = 0;
break;
case TCPDIAG_BC_S_GE:
- yes = entry->sport >= op[1].no;
+ yes = inet->num >= op[1].no;
break;
case TCPDIAG_BC_S_LE:
- yes = entry->dport <= op[1].no;
+ yes = inet->num <= op[1].no;
break;
case TCPDIAG_BC_D_GE:
- yes = entry->dport >= op[1].no;
+ yes = ntohs(inet->dport) >= op[1].no;
break;
case TCPDIAG_BC_D_LE:
- yes = entry->dport <= op[1].no;
+ yes = ntohs(inet->dport) <= op[1].no;
break;
case TCPDIAG_BC_AUTO:
- yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
+ yes = !(sk->sk_userlocks & SOCK_BINDPORT_LOCK);
break;
case TCPDIAG_BC_S_COND:
case TCPDIAG_BC_D_COND:
if (cond->port != -1 &&
cond->port != (op->code == TCPDIAG_BC_S_COND ?
- entry->sport : entry->dport)) {
+ inet->num : ntohs(inet->dport))) {
yes = 0;
break;
}
if (cond->prefix_len == 0)
break;
- if (op->code == TCPDIAG_BC_S_COND)
- addr = entry->saddr;
- else
- addr = entry->daddr;
+#ifdef CONFIG_IPV6
+ if (sk->sk_family == AF_INET6) {
+ struct ipv6_pinfo *np = inet6_sk(sk);
+
+ if (op->code == TCPDIAG_BC_S_COND)
+ addr = (u32*)&np->rcv_saddr;
+ else
+ addr = (u32*)&np->daddr;
+ } else
+#endif
+ {
+ if (op->code == TCPDIAG_BC_S_COND)
+ addr = &inet->rcv_saddr;
+ else
+ addr = &inet->daddr;
+ }
if (bitstring_match(addr, cond->addr, cond->prefix_len))
break;
- if (entry->family == AF_INET6 &&
+ if (sk->sk_family == AF_INET6 &&
cond->family == AF_INET) {
if (addr[0] == 0 && addr[1] == 0 &&
addr[2] == htonl(0xffff) &&
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_opt *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 open_request *req,
- u32 pid, u32 seq)
-{
- struct inet_opt *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 = req->rmt_port;
- r->id.tcpdiag_src[0] = req->af.v4_req.loc_addr;
- r->id.tcpdiag_dst[0] = req->af.v4_req.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,
- &req->af.v6_req.loc_addr);
- ipv6_addr_copy((struct in6_addr *)r->id.tcpdiag_dst,
- &req->af.v6_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_opt *tp = tcp_sk(sk);
- struct tcp_listen_opt *lopt;
- struct rtattr *bc = NULL;
- struct inet_opt *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->syn_wait_lock);
-
- lopt = tp->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 open_request *req, *head = lopt->syn_table[j];
-
- reqnum = 0;
- for (req = head; req; reqnum++, req = req->dl_next) {
- if (reqnum < s_reqnum)
- continue;
- if (r->id.tcpdiag_dport != req->rmt_port &&
- r->id.tcpdiag_dport)
- continue;
-
- if (bc) {
- entry.saddr =
-#ifdef CONFIG_IP_TCPDIAG_IPV6
- (entry.family == AF_INET6) ?
- req->af.v6_req.loc_addr.s6_addr32 :
-#endif
- &req->af.v4_req.loc_addr;
- entry.daddr =
-#ifdef CONFIG_IP_TCPDIAG_IPV6
- (entry.family == AF_INET6) ?
- req->af.v6_req.rmt_addr.s6_addr32 :
-#endif
- &req->af.v4_req.rmt_addr;
- entry.dport = ntohs(req->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->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);
+ struct rtattr *bc = NULL;
+
+ if (cb->nlh->nlmsg_len > 4+NLMSG_SPACE(sizeof(struct tcpdiagreq)))
+ bc = (struct rtattr*)(r+1);
s_i = cb->args[1];
s_num = num = cb->args[2];
struct sock *sk;
struct hlist_node *node;
+ if (i > s_i)
+ s_num = 0;
+
num = 0;
sk_for_each(sk, node, &tcp_listening_hash[i]) {
struct inet_opt *inet = inet_sk(sk);
-
- if (num < s_num) {
- num++;
- continue;
- }
-
+ if (num < s_num)
+ goto next_listen;
+ if (!(r->tcpdiag_states&TCPF_LISTEN) ||
+ r->id.tcpdiag_dport)
+ goto next_listen;
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))
+ if (bc && !tcpdiag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), sk))
goto next_listen;
-
- if (tcpdiag_dump_reqs(skb, sk, cb) < 0) {
+ if (tcpdiag_fill(skb, sk, r->tcpdiag_ext,
+ NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq) <= 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:
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) {
+ if (bc && !tcpdiag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), sk))
+ goto next_normal;
+ if (tcpdiag_fill(skb, sk, r->tcpdiag_ext,
+ NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq) <= 0) {
read_unlock_bh(&head->lock);
goto done;
}
if (r->id.tcpdiag_dport != inet->dport &&
r->id.tcpdiag_dport)
goto next_dying;
- if (tcpdiag_dump_sock(skb, sk, cb) < 0) {
+ if (bc && !tcpdiag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), sk))
+ goto next_dying;
+ if (tcpdiag_fill(skb, sk, r->tcpdiag_ext,
+ NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq) <= 0) {
read_unlock_bh(&head->lock);
goto done;
}
}
}
-static int __init tcpdiag_init(void)
+void __init tcpdiag_init(void)
{
tcpnl = netlink_kernel_create(NETLINK_TCPDIAG, tcpdiag_rcv);
if (tcpnl == NULL)
- return -ENOMEM;
- return 0;
+ panic("tcpdiag_init: Cannot create netlink socket.");
}
-
-static void __exit tcpdiag_exit(void)
-{
- sock_release(tcpnl->sk_socket);
-}
-
-module_init(tcpdiag_init);
-module_exit(tcpdiag_exit);
-MODULE_LICENSE("GPL");
git://git.onelab.eu / linux-2.6.git / blobdiff