1 // SPDX-License-Identifier: GPL-2.0
4 * Copyright (c) 2022, Intel Corporation.
9 void mptcp_free_local_addr_list(struct mptcp_sock *msk)
11 struct mptcp_pm_addr_entry *entry, *tmp;
12 struct sock *sk = (struct sock *)msk;
15 if (!mptcp_pm_is_userspace(msk))
18 spin_lock_bh(&msk->pm.lock);
19 list_splice_init(&msk->pm.userspace_pm_local_addr_list, &free_list);
20 spin_unlock_bh(&msk->pm.lock);
22 list_for_each_entry_safe(entry, tmp, &free_list, list) {
23 sock_kfree_s(sk, entry, sizeof(*entry));
27 int mptcp_userspace_pm_append_new_local_addr(struct mptcp_sock *msk,
28 struct mptcp_pm_addr_entry *entry)
30 DECLARE_BITMAP(id_bitmap, MPTCP_PM_MAX_ADDR_ID + 1);
31 struct mptcp_pm_addr_entry *match = NULL;
32 struct sock *sk = (struct sock *)msk;
33 struct mptcp_pm_addr_entry *e;
34 bool addr_match = false;
35 bool id_match = false;
38 bitmap_zero(id_bitmap, MPTCP_PM_MAX_ADDR_ID + 1);
40 spin_lock_bh(&msk->pm.lock);
41 list_for_each_entry(e, &msk->pm.userspace_pm_local_addr_list, list) {
42 addr_match = mptcp_addresses_equal(&e->addr, &entry->addr, true);
43 if (addr_match && entry->addr.id == 0)
44 entry->addr.id = e->addr.id;
45 id_match = (e->addr.id == entry->addr.id);
46 if (addr_match && id_match) {
49 } else if (addr_match || id_match) {
52 __set_bit(e->addr.id, id_bitmap);
55 if (!match && !addr_match && !id_match) {
56 /* Memory for the entry is allocated from the
59 e = sock_kmalloc(sk, sizeof(*e), GFP_ATOMIC);
61 spin_unlock_bh(&msk->pm.lock);
67 e->addr.id = find_next_zero_bit(id_bitmap,
68 MPTCP_PM_MAX_ADDR_ID + 1,
70 list_add_tail_rcu(&e->list, &msk->pm.userspace_pm_local_addr_list);
76 spin_unlock_bh(&msk->pm.lock);
80 int mptcp_userspace_pm_get_flags_and_ifindex_by_id(struct mptcp_sock *msk,
82 u8 *flags, int *ifindex)
84 struct mptcp_pm_addr_entry *entry, *match = NULL;
89 spin_lock_bh(&msk->pm.lock);
90 list_for_each_entry(entry, &msk->pm.userspace_pm_local_addr_list, list) {
91 if (id == entry->addr.id) {
96 spin_unlock_bh(&msk->pm.lock);
98 *flags = match->flags;
99 *ifindex = match->ifindex;
105 int mptcp_userspace_pm_get_local_id(struct mptcp_sock *msk,
106 struct mptcp_addr_info *skc)
108 struct mptcp_pm_addr_entry new_entry;
109 __be16 msk_sport = ((struct inet_sock *)
110 inet_sk((struct sock *)msk))->inet_sport;
112 memset(&new_entry, 0, sizeof(struct mptcp_pm_addr_entry));
113 new_entry.addr = *skc;
114 new_entry.addr.id = 0;
115 new_entry.flags = MPTCP_PM_ADDR_FLAG_IMPLICIT;
117 if (new_entry.addr.port == msk_sport)
118 new_entry.addr.port = 0;
120 return mptcp_userspace_pm_append_new_local_addr(msk, &new_entry);
123 int mptcp_nl_cmd_announce(struct sk_buff *skb, struct genl_info *info)
125 struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN];
126 struct nlattr *addr = info->attrs[MPTCP_PM_ATTR_ADDR];
127 struct mptcp_pm_addr_entry addr_val;
128 struct mptcp_sock *msk;
132 if (!addr || !token) {
133 GENL_SET_ERR_MSG(info, "missing required inputs");
137 token_val = nla_get_u32(token);
139 msk = mptcp_token_get_sock(sock_net(skb->sk), token_val);
141 NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token");
145 if (!mptcp_pm_is_userspace(msk)) {
146 GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected");
150 err = mptcp_pm_parse_entry(addr, info, true, &addr_val);
152 GENL_SET_ERR_MSG(info, "error parsing local address");
156 if (addr_val.addr.id == 0 || !(addr_val.flags & MPTCP_PM_ADDR_FLAG_SIGNAL)) {
157 GENL_SET_ERR_MSG(info, "invalid addr id or flags");
161 err = mptcp_userspace_pm_append_new_local_addr(msk, &addr_val);
163 GENL_SET_ERR_MSG(info, "did not match address and id");
167 lock_sock((struct sock *)msk);
168 spin_lock_bh(&msk->pm.lock);
170 if (mptcp_pm_alloc_anno_list(msk, &addr_val)) {
171 mptcp_pm_announce_addr(msk, &addr_val.addr, false);
172 mptcp_pm_nl_addr_send_ack(msk);
175 spin_unlock_bh(&msk->pm.lock);
176 release_sock((struct sock *)msk);
180 sock_put((struct sock *)msk);
184 int mptcp_nl_cmd_remove(struct sk_buff *skb, struct genl_info *info)
186 struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN];
187 struct nlattr *id = info->attrs[MPTCP_PM_ATTR_LOC_ID];
188 struct mptcp_pm_addr_entry *match = NULL;
189 struct mptcp_pm_addr_entry *entry;
190 struct mptcp_sock *msk;
191 LIST_HEAD(free_list);
197 GENL_SET_ERR_MSG(info, "missing required inputs");
201 id_val = nla_get_u8(id);
202 token_val = nla_get_u32(token);
204 msk = mptcp_token_get_sock(sock_net(skb->sk), token_val);
206 NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token");
210 if (!mptcp_pm_is_userspace(msk)) {
211 GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected");
215 lock_sock((struct sock *)msk);
217 list_for_each_entry(entry, &msk->pm.userspace_pm_local_addr_list, list) {
218 if (entry->addr.id == id_val) {
225 GENL_SET_ERR_MSG(info, "address with specified id not found");
226 release_sock((struct sock *)msk);
230 list_move(&match->list, &free_list);
232 mptcp_pm_remove_addrs_and_subflows(msk, &free_list);
234 release_sock((struct sock *)msk);
236 list_for_each_entry_safe(match, entry, &free_list, list) {
237 sock_kfree_s((struct sock *)msk, match, sizeof(*match));
242 sock_put((struct sock *)msk);
246 int mptcp_nl_cmd_sf_create(struct sk_buff *skb, struct genl_info *info)
248 struct nlattr *raddr = info->attrs[MPTCP_PM_ATTR_ADDR_REMOTE];
249 struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN];
250 struct nlattr *laddr = info->attrs[MPTCP_PM_ATTR_ADDR];
251 struct mptcp_addr_info addr_r;
252 struct mptcp_addr_info addr_l;
253 struct mptcp_sock *msk;
258 if (!laddr || !raddr || !token) {
259 GENL_SET_ERR_MSG(info, "missing required inputs");
263 token_val = nla_get_u32(token);
265 msk = mptcp_token_get_sock(genl_info_net(info), token_val);
267 NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token");
271 if (!mptcp_pm_is_userspace(msk)) {
272 GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected");
276 err = mptcp_pm_parse_addr(laddr, info, &addr_l);
278 NL_SET_ERR_MSG_ATTR(info->extack, laddr, "error parsing local addr");
282 if (addr_l.id == 0) {
283 NL_SET_ERR_MSG_ATTR(info->extack, laddr, "missing local addr id");
287 err = mptcp_pm_parse_addr(raddr, info, &addr_r);
289 NL_SET_ERR_MSG_ATTR(info->extack, raddr, "error parsing remote addr");
293 sk = &msk->sk.icsk_inet.sk;
296 err = __mptcp_subflow_connect(sk, &addr_l, &addr_r);
301 sock_put((struct sock *)msk);
305 static struct sock *mptcp_nl_find_ssk(struct mptcp_sock *msk,
306 const struct mptcp_addr_info *local,
307 const struct mptcp_addr_info *remote)
309 struct sock *sk = &msk->sk.icsk_inet.sk;
310 struct mptcp_subflow_context *subflow;
311 struct sock *found = NULL;
313 if (local->family != remote->family)
318 mptcp_for_each_subflow(msk, subflow) {
319 const struct inet_sock *issk;
322 ssk = mptcp_subflow_tcp_sock(subflow);
324 if (local->family != ssk->sk_family)
329 switch (ssk->sk_family) {
331 if (issk->inet_saddr != local->addr.s_addr ||
332 issk->inet_daddr != remote->addr.s_addr)
335 #if IS_ENABLED(CONFIG_MPTCP_IPV6)
337 const struct ipv6_pinfo *pinfo = inet6_sk(ssk);
339 if (!ipv6_addr_equal(&local->addr6, &pinfo->saddr) ||
340 !ipv6_addr_equal(&remote->addr6, &ssk->sk_v6_daddr))
349 if (issk->inet_sport == local->port &&
350 issk->inet_dport == remote->port) {
362 int mptcp_nl_cmd_sf_destroy(struct sk_buff *skb, struct genl_info *info)
364 struct nlattr *raddr = info->attrs[MPTCP_PM_ATTR_ADDR_REMOTE];
365 struct nlattr *token = info->attrs[MPTCP_PM_ATTR_TOKEN];
366 struct nlattr *laddr = info->attrs[MPTCP_PM_ATTR_ADDR];
367 struct mptcp_addr_info addr_l;
368 struct mptcp_addr_info addr_r;
369 struct mptcp_sock *msk;
370 struct sock *sk, *ssk;
374 if (!laddr || !raddr || !token) {
375 GENL_SET_ERR_MSG(info, "missing required inputs");
379 token_val = nla_get_u32(token);
381 msk = mptcp_token_get_sock(genl_info_net(info), token_val);
383 NL_SET_ERR_MSG_ATTR(info->extack, token, "invalid token");
387 if (!mptcp_pm_is_userspace(msk)) {
388 GENL_SET_ERR_MSG(info, "invalid request; userspace PM not selected");
392 err = mptcp_pm_parse_addr(laddr, info, &addr_l);
394 NL_SET_ERR_MSG_ATTR(info->extack, laddr, "error parsing local addr");
398 err = mptcp_pm_parse_addr(raddr, info, &addr_r);
400 NL_SET_ERR_MSG_ATTR(info->extack, raddr, "error parsing remote addr");
404 if (addr_l.family != addr_r.family) {
405 GENL_SET_ERR_MSG(info, "address families do not match");
409 if (!addr_l.port || !addr_r.port) {
410 GENL_SET_ERR_MSG(info, "missing local or remote port");
414 sk = &msk->sk.icsk_inet.sk;
415 ssk = mptcp_nl_find_ssk(msk, &addr_l, &addr_r);
417 struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(ssk);
419 mptcp_subflow_shutdown(sk, ssk, RCV_SHUTDOWN | SEND_SHUTDOWN);
420 mptcp_close_ssk(sk, ssk, subflow);
427 sock_put((struct sock *)msk);