2016-04-14 07:35:33 +00:00
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#include <linux/module.h>
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#include <linux/inet_diag.h>
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#include <linux/sock_diag.h>
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#include <net/sctp/sctp.h>
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static void sctp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
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void *info);
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/* define some functions to make asoc/ep fill look clean */
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static void inet_diag_msg_sctpasoc_fill(struct inet_diag_msg *r,
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struct sock *sk,
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struct sctp_association *asoc)
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{
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union sctp_addr laddr, paddr;
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struct dst_entry *dst;
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2016-08-04 10:11:56 +00:00
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struct timer_list *t3_rtx = &asoc->peer.primary_path->T3_rtx_timer;
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2016-04-14 07:35:33 +00:00
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laddr = list_entry(asoc->base.bind_addr.address_list.next,
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struct sctp_sockaddr_entry, list)->a;
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paddr = asoc->peer.primary_path->ipaddr;
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dst = asoc->peer.primary_path->dst;
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r->idiag_family = sk->sk_family;
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r->id.idiag_sport = htons(asoc->base.bind_addr.port);
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r->id.idiag_dport = htons(asoc->peer.port);
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r->id.idiag_if = dst ? dst->dev->ifindex : 0;
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sock_diag_save_cookie(sk, r->id.idiag_cookie);
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#if IS_ENABLED(CONFIG_IPV6)
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if (sk->sk_family == AF_INET6) {
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*(struct in6_addr *)r->id.idiag_src = laddr.v6.sin6_addr;
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*(struct in6_addr *)r->id.idiag_dst = paddr.v6.sin6_addr;
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} else
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#endif
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{
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memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src));
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memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst));
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r->id.idiag_src[0] = laddr.v4.sin_addr.s_addr;
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r->id.idiag_dst[0] = paddr.v4.sin_addr.s_addr;
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}
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r->idiag_state = asoc->state;
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2016-08-04 10:11:56 +00:00
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if (timer_pending(t3_rtx)) {
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r->idiag_timer = SCTP_EVENT_TIMEOUT_T3_RTX;
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r->idiag_retrans = asoc->rtx_data_chunks;
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r->idiag_expires = jiffies_to_msecs(t3_rtx->expires - jiffies);
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} else {
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r->idiag_timer = 0;
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r->idiag_retrans = 0;
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r->idiag_expires = 0;
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}
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2016-04-14 07:35:33 +00:00
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}
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static int inet_diag_msg_sctpladdrs_fill(struct sk_buff *skb,
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struct list_head *address_list)
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{
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struct sctp_sockaddr_entry *laddr;
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int addrlen = sizeof(struct sockaddr_storage);
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int addrcnt = 0;
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struct nlattr *attr;
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void *info = NULL;
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list_for_each_entry_rcu(laddr, address_list, list)
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addrcnt++;
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attr = nla_reserve(skb, INET_DIAG_LOCALS, addrlen * addrcnt);
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if (!attr)
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return -EMSGSIZE;
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info = nla_data(attr);
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list_for_each_entry_rcu(laddr, address_list, list) {
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memcpy(info, &laddr->a, addrlen);
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info += addrlen;
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}
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return 0;
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}
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static int inet_diag_msg_sctpaddrs_fill(struct sk_buff *skb,
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struct sctp_association *asoc)
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{
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int addrlen = sizeof(struct sockaddr_storage);
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struct sctp_transport *from;
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struct nlattr *attr;
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void *info = NULL;
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attr = nla_reserve(skb, INET_DIAG_PEERS,
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addrlen * asoc->peer.transport_count);
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if (!attr)
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return -EMSGSIZE;
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info = nla_data(attr);
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list_for_each_entry(from, &asoc->peer.transport_addr_list,
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transports) {
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memcpy(info, &from->ipaddr, addrlen);
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info += addrlen;
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}
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return 0;
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}
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/* sctp asoc/ep fill*/
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static int inet_sctp_diag_fill(struct sock *sk, struct sctp_association *asoc,
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struct sk_buff *skb,
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const struct inet_diag_req_v2 *req,
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struct user_namespace *user_ns,
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int portid, u32 seq, u16 nlmsg_flags,
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const struct nlmsghdr *unlh)
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{
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struct sctp_endpoint *ep = sctp_sk(sk)->ep;
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struct list_head *addr_list;
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struct inet_diag_msg *r;
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struct nlmsghdr *nlh;
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int ext = req->idiag_ext;
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struct sctp_infox infox;
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void *info = NULL;
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nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
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nlmsg_flags);
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if (!nlh)
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return -EMSGSIZE;
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r = nlmsg_data(nlh);
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BUG_ON(!sk_fullsock(sk));
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if (asoc) {
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inet_diag_msg_sctpasoc_fill(r, sk, asoc);
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} else {
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inet_diag_msg_common_fill(r, sk);
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r->idiag_state = sk->sk_state;
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r->idiag_timer = 0;
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r->idiag_retrans = 0;
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}
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if (inet_diag_msg_attrs_fill(sk, skb, r, ext, user_ns))
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goto errout;
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if (ext & (1 << (INET_DIAG_SKMEMINFO - 1))) {
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u32 mem[SK_MEMINFO_VARS];
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int amt;
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if (asoc && asoc->ep->sndbuf_policy)
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amt = asoc->sndbuf_used;
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else
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amt = sk_wmem_alloc_get(sk);
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mem[SK_MEMINFO_WMEM_ALLOC] = amt;
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2016-04-24 15:21:22 +00:00
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if (asoc && asoc->ep->rcvbuf_policy)
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amt = atomic_read(&asoc->rmem_alloc);
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else
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amt = sk_rmem_alloc_get(sk);
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mem[SK_MEMINFO_RMEM_ALLOC] = amt;
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2016-04-14 07:35:33 +00:00
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mem[SK_MEMINFO_RCVBUF] = sk->sk_rcvbuf;
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mem[SK_MEMINFO_SNDBUF] = sk->sk_sndbuf;
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mem[SK_MEMINFO_FWD_ALLOC] = sk->sk_forward_alloc;
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mem[SK_MEMINFO_WMEM_QUEUED] = sk->sk_wmem_queued;
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mem[SK_MEMINFO_OPTMEM] = atomic_read(&sk->sk_omem_alloc);
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mem[SK_MEMINFO_BACKLOG] = sk->sk_backlog.len;
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mem[SK_MEMINFO_DROPS] = atomic_read(&sk->sk_drops);
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if (nla_put(skb, INET_DIAG_SKMEMINFO, sizeof(mem), &mem) < 0)
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goto errout;
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}
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if (ext & (1 << (INET_DIAG_INFO - 1))) {
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struct nlattr *attr;
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2016-04-26 08:06:14 +00:00
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attr = nla_reserve_64bit(skb, INET_DIAG_INFO,
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sizeof(struct sctp_info),
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INET_DIAG_PAD);
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2016-04-14 07:35:33 +00:00
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if (!attr)
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goto errout;
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info = nla_data(attr);
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}
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infox.sctpinfo = (struct sctp_info *)info;
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infox.asoc = asoc;
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sctp_diag_get_info(sk, r, &infox);
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addr_list = asoc ? &asoc->base.bind_addr.address_list
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: &ep->base.bind_addr.address_list;
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if (inet_diag_msg_sctpladdrs_fill(skb, addr_list))
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goto errout;
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if (asoc && (ext & (1 << (INET_DIAG_CONG - 1))))
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if (nla_put_string(skb, INET_DIAG_CONG, "reno") < 0)
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goto errout;
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if (asoc && inet_diag_msg_sctpaddrs_fill(skb, asoc))
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goto errout;
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nlmsg_end(skb, nlh);
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return 0;
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errout:
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nlmsg_cancel(skb, nlh);
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return -EMSGSIZE;
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}
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/* callback and param */
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struct sctp_comm_param {
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struct sk_buff *skb;
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struct netlink_callback *cb;
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const struct inet_diag_req_v2 *r;
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const struct nlmsghdr *nlh;
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};
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static size_t inet_assoc_attr_size(struct sctp_association *asoc)
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{
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int addrlen = sizeof(struct sockaddr_storage);
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int addrcnt = 0;
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struct sctp_sockaddr_entry *laddr;
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list_for_each_entry_rcu(laddr, &asoc->base.bind_addr.address_list,
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list)
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addrcnt++;
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return nla_total_size(sizeof(struct sctp_info))
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+ nla_total_size(1) /* INET_DIAG_SHUTDOWN */
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+ nla_total_size(1) /* INET_DIAG_TOS */
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+ nla_total_size(1) /* INET_DIAG_TCLASS */
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+ nla_total_size(addrlen * asoc->peer.transport_count)
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+ nla_total_size(addrlen * addrcnt)
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+ nla_total_size(sizeof(struct inet_diag_meminfo))
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+ nla_total_size(sizeof(struct inet_diag_msg))
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+ 64;
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}
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static int sctp_tsp_dump_one(struct sctp_transport *tsp, void *p)
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{
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struct sctp_association *assoc = tsp->asoc;
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struct sock *sk = tsp->asoc->base.sk;
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struct sctp_comm_param *commp = p;
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struct sk_buff *in_skb = commp->skb;
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const struct inet_diag_req_v2 *req = commp->r;
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const struct nlmsghdr *nlh = commp->nlh;
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struct net *net = sock_net(in_skb->sk);
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struct sk_buff *rep;
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int err;
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err = sock_diag_check_cookie(sk, req->id.idiag_cookie);
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if (err)
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goto out;
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err = -ENOMEM;
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rep = nlmsg_new(inet_assoc_attr_size(assoc), GFP_KERNEL);
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if (!rep)
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goto out;
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lock_sock(sk);
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if (sk != assoc->base.sk) {
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release_sock(sk);
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sk = assoc->base.sk;
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lock_sock(sk);
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}
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err = inet_sctp_diag_fill(sk, assoc, rep, req,
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sk_user_ns(NETLINK_CB(in_skb).sk),
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NETLINK_CB(in_skb).portid,
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nlh->nlmsg_seq, 0, nlh);
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release_sock(sk);
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if (err < 0) {
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WARN_ON(err == -EMSGSIZE);
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kfree_skb(rep);
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goto out;
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}
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err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid,
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MSG_DONTWAIT);
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if (err > 0)
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err = 0;
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out:
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return err;
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}
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static int sctp_tsp_dump(struct sctp_transport *tsp, void *p)
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{
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struct sctp_endpoint *ep = tsp->asoc->ep;
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struct sctp_comm_param *commp = p;
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struct sock *sk = ep->base.sk;
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struct sk_buff *skb = commp->skb;
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struct netlink_callback *cb = commp->cb;
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const struct inet_diag_req_v2 *r = commp->r;
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struct sctp_association *assoc =
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list_entry(ep->asocs.next, struct sctp_association, asocs);
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int err = 0;
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/* find the ep only once through the transports by this condition */
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if (tsp->asoc != assoc)
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goto out;
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if (r->sdiag_family != AF_UNSPEC && sk->sk_family != r->sdiag_family)
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goto out;
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lock_sock(sk);
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if (sk != assoc->base.sk)
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goto release;
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list_for_each_entry(assoc, &ep->asocs, asocs) {
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if (cb->args[4] < cb->args[1])
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goto next;
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if (r->id.idiag_sport != htons(assoc->base.bind_addr.port) &&
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r->id.idiag_sport)
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goto next;
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if (r->id.idiag_dport != htons(assoc->peer.port) &&
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r->id.idiag_dport)
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goto next;
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if (!cb->args[3] &&
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inet_sctp_diag_fill(sk, NULL, skb, r,
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sk_user_ns(NETLINK_CB(cb->skb).sk),
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NETLINK_CB(cb->skb).portid,
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cb->nlh->nlmsg_seq,
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NLM_F_MULTI, cb->nlh) < 0) {
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cb->args[3] = 1;
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err = 2;
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goto release;
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}
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cb->args[3] = 1;
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if (inet_sctp_diag_fill(sk, assoc, skb, r,
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sk_user_ns(NETLINK_CB(cb->skb).sk),
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NETLINK_CB(cb->skb).portid,
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cb->nlh->nlmsg_seq, 0, cb->nlh) < 0) {
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err = 2;
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goto release;
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}
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next:
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cb->args[4]++;
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}
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cb->args[1] = 0;
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cb->args[2]++;
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cb->args[3] = 0;
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cb->args[4] = 0;
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release:
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release_sock(sk);
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return err;
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out:
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cb->args[2]++;
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return err;
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}
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static int sctp_ep_dump(struct sctp_endpoint *ep, void *p)
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{
|
|
|
|
struct sctp_comm_param *commp = p;
|
|
|
|
struct sock *sk = ep->base.sk;
|
|
|
|
struct sk_buff *skb = commp->skb;
|
|
|
|
struct netlink_callback *cb = commp->cb;
|
|
|
|
const struct inet_diag_req_v2 *r = commp->r;
|
|
|
|
struct net *net = sock_net(skb->sk);
|
|
|
|
struct inet_sock *inet = inet_sk(sk);
|
|
|
|
int err = 0;
|
|
|
|
|
|
|
|
if (!net_eq(sock_net(sk), net))
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
if (cb->args[4] < cb->args[1])
|
|
|
|
goto next;
|
|
|
|
|
2016-08-04 10:11:57 +00:00
|
|
|
if (!(r->idiag_states & TCPF_LISTEN) && !list_empty(&ep->asocs))
|
sctp: fix double EPs display in sctp_diag
We have this situation: that EP hash table, contains only the EPs
that are listening, while the transports one, has the opposite.
We have to traverse both to dump all.
But when we traverse the transports one we will also get EPs that are
in the EP hash if they are listening. In this case, the EP is dumped
twice.
We will fix it by checking if the endpoint that is in the endpoint
hash table contains any ep->asoc in there, as it means we will also
find it via transport hash, and thus we can/should skip it, depending
on the filters used, like 'ss -l'.
Still, we should NOT skip it if the user is listing only listening
endpoints, because then we are not traversing the transport hash.
so we have to check idiag_states there also.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-05-25 19:09:23 +00:00
|
|
|
goto next;
|
|
|
|
|
2016-04-14 07:35:33 +00:00
|
|
|
if (r->sdiag_family != AF_UNSPEC &&
|
|
|
|
sk->sk_family != r->sdiag_family)
|
|
|
|
goto next;
|
|
|
|
|
|
|
|
if (r->id.idiag_sport != inet->inet_sport &&
|
|
|
|
r->id.idiag_sport)
|
|
|
|
goto next;
|
|
|
|
|
|
|
|
if (r->id.idiag_dport != inet->inet_dport &&
|
|
|
|
r->id.idiag_dport)
|
|
|
|
goto next;
|
|
|
|
|
|
|
|
if (inet_sctp_diag_fill(sk, NULL, skb, r,
|
|
|
|
sk_user_ns(NETLINK_CB(cb->skb).sk),
|
|
|
|
NETLINK_CB(cb->skb).portid,
|
|
|
|
cb->nlh->nlmsg_seq, NLM_F_MULTI,
|
|
|
|
cb->nlh) < 0) {
|
|
|
|
err = 2;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
next:
|
|
|
|
cb->args[4]++;
|
|
|
|
out:
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* define the functions for sctp_diag_handler*/
|
|
|
|
static void sctp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
|
|
|
|
void *info)
|
|
|
|
{
|
|
|
|
struct sctp_infox *infox = (struct sctp_infox *)info;
|
|
|
|
|
|
|
|
if (infox->asoc) {
|
|
|
|
r->idiag_rqueue = atomic_read(&infox->asoc->rmem_alloc);
|
|
|
|
r->idiag_wqueue = infox->asoc->sndbuf_used;
|
|
|
|
} else {
|
|
|
|
r->idiag_rqueue = sk->sk_ack_backlog;
|
|
|
|
r->idiag_wqueue = sk->sk_max_ack_backlog;
|
|
|
|
}
|
|
|
|
if (infox->sctpinfo)
|
|
|
|
sctp_get_sctp_info(sk, infox->asoc, infox->sctpinfo);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int sctp_diag_dump_one(struct sk_buff *in_skb,
|
|
|
|
const struct nlmsghdr *nlh,
|
|
|
|
const struct inet_diag_req_v2 *req)
|
|
|
|
{
|
|
|
|
struct net *net = sock_net(in_skb->sk);
|
|
|
|
union sctp_addr laddr, paddr;
|
|
|
|
struct sctp_comm_param commp = {
|
|
|
|
.skb = in_skb,
|
|
|
|
.r = req,
|
|
|
|
.nlh = nlh,
|
|
|
|
};
|
|
|
|
|
|
|
|
if (req->sdiag_family == AF_INET) {
|
|
|
|
laddr.v4.sin_port = req->id.idiag_sport;
|
|
|
|
laddr.v4.sin_addr.s_addr = req->id.idiag_src[0];
|
|
|
|
laddr.v4.sin_family = AF_INET;
|
|
|
|
|
|
|
|
paddr.v4.sin_port = req->id.idiag_dport;
|
|
|
|
paddr.v4.sin_addr.s_addr = req->id.idiag_dst[0];
|
|
|
|
paddr.v4.sin_family = AF_INET;
|
|
|
|
} else {
|
|
|
|
laddr.v6.sin6_port = req->id.idiag_sport;
|
2016-08-23 15:40:52 +00:00
|
|
|
memcpy(&laddr.v6.sin6_addr, req->id.idiag_src,
|
|
|
|
sizeof(laddr.v6.sin6_addr));
|
2016-04-14 07:35:33 +00:00
|
|
|
laddr.v6.sin6_family = AF_INET6;
|
|
|
|
|
|
|
|
paddr.v6.sin6_port = req->id.idiag_dport;
|
2016-08-23 15:40:52 +00:00
|
|
|
memcpy(&paddr.v6.sin6_addr, req->id.idiag_dst,
|
|
|
|
sizeof(paddr.v6.sin6_addr));
|
2016-04-14 07:35:33 +00:00
|
|
|
paddr.v6.sin6_family = AF_INET6;
|
|
|
|
}
|
|
|
|
|
|
|
|
return sctp_transport_lookup_process(sctp_tsp_dump_one,
|
|
|
|
net, &laddr, &paddr, &commp);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void sctp_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
|
|
|
|
const struct inet_diag_req_v2 *r, struct nlattr *bc)
|
|
|
|
{
|
|
|
|
u32 idiag_states = r->idiag_states;
|
|
|
|
struct net *net = sock_net(skb->sk);
|
|
|
|
struct sctp_comm_param commp = {
|
|
|
|
.skb = skb,
|
|
|
|
.cb = cb,
|
|
|
|
.r = r,
|
|
|
|
};
|
|
|
|
|
|
|
|
/* eps hashtable dumps
|
|
|
|
* args:
|
|
|
|
* 0 : if it will traversal listen sock
|
|
|
|
* 1 : to record the sock pos of this time's traversal
|
|
|
|
* 4 : to work as a temporary variable to traversal list
|
|
|
|
*/
|
|
|
|
if (cb->args[0] == 0) {
|
|
|
|
if (!(idiag_states & TCPF_LISTEN))
|
|
|
|
goto skip;
|
|
|
|
if (sctp_for_each_endpoint(sctp_ep_dump, &commp))
|
|
|
|
goto done;
|
|
|
|
skip:
|
|
|
|
cb->args[0] = 1;
|
|
|
|
cb->args[1] = 0;
|
|
|
|
cb->args[4] = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* asocs by transport hashtable dump
|
|
|
|
* args:
|
|
|
|
* 1 : to record the assoc pos of this time's traversal
|
|
|
|
* 2 : to record the transport pos of this time's traversal
|
|
|
|
* 3 : to mark if we have dumped the ep info of the current asoc
|
|
|
|
* 4 : to work as a temporary variable to traversal list
|
|
|
|
*/
|
2016-08-04 10:11:57 +00:00
|
|
|
if (!(idiag_states & ~(TCPF_LISTEN | TCPF_CLOSE)))
|
2016-04-14 07:35:33 +00:00
|
|
|
goto done;
|
|
|
|
sctp_for_each_transport(sctp_tsp_dump, net, cb->args[2], &commp);
|
|
|
|
done:
|
|
|
|
cb->args[1] = cb->args[4];
|
|
|
|
cb->args[4] = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct inet_diag_handler sctp_diag_handler = {
|
|
|
|
.dump = sctp_diag_dump,
|
|
|
|
.dump_one = sctp_diag_dump_one,
|
|
|
|
.idiag_get_info = sctp_diag_get_info,
|
|
|
|
.idiag_type = IPPROTO_SCTP,
|
|
|
|
.idiag_info_size = sizeof(struct sctp_info),
|
|
|
|
};
|
|
|
|
|
|
|
|
static int __init sctp_diag_init(void)
|
|
|
|
{
|
|
|
|
return inet_diag_register(&sctp_diag_handler);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit sctp_diag_exit(void)
|
|
|
|
{
|
|
|
|
inet_diag_unregister(&sctp_diag_handler);
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(sctp_diag_init);
|
|
|
|
module_exit(sctp_diag_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2-132);
|