From a8c2190ee7da1a1dc68ff1a6b5f03feb61e523a5 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Fri, 12 Aug 2005 12:56:38 -0300 Subject: [INET_DIAG]: Rename tcp_diag.[ch] to inet_diag.[ch] Next changeset will introduce net/ipv4/tcp_diag.c, moving the code that was put transitioanlly in inet_diag.c. Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: David S. Miller --- net/ipv4/tcp_diag.c | 892 ---------------------------------------------------- 1 file changed, 892 deletions(-) delete mode 100644 net/ipv4/tcp_diag.c (limited to 'net/ipv4/tcp_diag.c') diff --git a/net/ipv4/tcp_diag.c b/net/ipv4/tcp_diag.c deleted file mode 100644 index 24abe82e23a0..000000000000 --- a/net/ipv4/tcp_diag.c +++ /dev/null @@ -1,892 +0,0 @@ -/* - * 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, - * - * 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 -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -#include - -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"); -- cgit v1.2.3-59-g8ed1b