diff options
Diffstat (limited to 'net/ipv4/tcp_diag.c')
| -rw-r--r-- | net/ipv4/tcp_diag.c | 784 |
1 files changed, 24 insertions, 760 deletions
diff --git a/net/ipv4/tcp_diag.c b/net/ipv4/tcp_diag.c index f66945cb158f..c148c1081880 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"); |
