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Diffstat (limited to 'net/bluetooth/l2cap.c')
-rw-r--r--net/bluetooth/l2cap.c357
1 files changed, 177 insertions, 180 deletions
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index f6501fa0d59f..eaaad658d11d 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -63,11 +63,6 @@ static struct bt_sock_list l2cap_sk_list = {
63 .lock = RW_LOCK_UNLOCKED 63 .lock = RW_LOCK_UNLOCKED
64}; 64};
65 65
66static int l2cap_conn_del(struct hci_conn *conn, int err);
67
68static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent);
69static void l2cap_chan_del(struct sock *sk, int err);
70
71static void __l2cap_sock_close(struct sock *sk, int reason); 66static void __l2cap_sock_close(struct sock *sk, int reason);
72static void l2cap_sock_close(struct sock *sk); 67static void l2cap_sock_close(struct sock *sk);
73static void l2cap_sock_kill(struct sock *sk); 68static void l2cap_sock_kill(struct sock *sk);
@@ -109,24 +104,177 @@ static void l2cap_sock_init_timer(struct sock *sk)
109 sk->sk_timer.data = (unsigned long)sk; 104 sk->sk_timer.data = (unsigned long)sk;
110} 105}
111 106
107/* ---- L2CAP channels ---- */
108static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid)
109{
110 struct sock *s;
111 for (s = l->head; s; s = l2cap_pi(s)->next_c) {
112 if (l2cap_pi(s)->dcid == cid)
113 break;
114 }
115 return s;
116}
117
118static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid)
119{
120 struct sock *s;
121 for (s = l->head; s; s = l2cap_pi(s)->next_c) {
122 if (l2cap_pi(s)->scid == cid)
123 break;
124 }
125 return s;
126}
127
128/* Find channel with given SCID.
129 * Returns locked socket */
130static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid)
131{
132 struct sock *s;
133 read_lock(&l->lock);
134 s = __l2cap_get_chan_by_scid(l, cid);
135 if (s) bh_lock_sock(s);
136 read_unlock(&l->lock);
137 return s;
138}
139
140static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident)
141{
142 struct sock *s;
143 for (s = l->head; s; s = l2cap_pi(s)->next_c) {
144 if (l2cap_pi(s)->ident == ident)
145 break;
146 }
147 return s;
148}
149
150static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident)
151{
152 struct sock *s;
153 read_lock(&l->lock);
154 s = __l2cap_get_chan_by_ident(l, ident);
155 if (s) bh_lock_sock(s);
156 read_unlock(&l->lock);
157 return s;
158}
159
160static u16 l2cap_alloc_cid(struct l2cap_chan_list *l)
161{
162 u16 cid = 0x0040;
163
164 for (; cid < 0xffff; cid++) {
165 if(!__l2cap_get_chan_by_scid(l, cid))
166 return cid;
167 }
168
169 return 0;
170}
171
172static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk)
173{
174 sock_hold(sk);
175
176 if (l->head)
177 l2cap_pi(l->head)->prev_c = sk;
178
179 l2cap_pi(sk)->next_c = l->head;
180 l2cap_pi(sk)->prev_c = NULL;
181 l->head = sk;
182}
183
184static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk)
185{
186 struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c;
187
188 write_lock(&l->lock);
189 if (sk == l->head)
190 l->head = next;
191
192 if (next)
193 l2cap_pi(next)->prev_c = prev;
194 if (prev)
195 l2cap_pi(prev)->next_c = next;
196 write_unlock(&l->lock);
197
198 __sock_put(sk);
199}
200
201static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent)
202{
203 struct l2cap_chan_list *l = &conn->chan_list;
204
205 BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid);
206
207 l2cap_pi(sk)->conn = conn;
208
209 if (sk->sk_type == SOCK_SEQPACKET) {
210 /* Alloc CID for connection-oriented socket */
211 l2cap_pi(sk)->scid = l2cap_alloc_cid(l);
212 } else if (sk->sk_type == SOCK_DGRAM) {
213 /* Connectionless socket */
214 l2cap_pi(sk)->scid = 0x0002;
215 l2cap_pi(sk)->dcid = 0x0002;
216 l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU;
217 } else {
218 /* Raw socket can send/recv signalling messages only */
219 l2cap_pi(sk)->scid = 0x0001;
220 l2cap_pi(sk)->dcid = 0x0001;
221 l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU;
222 }
223
224 __l2cap_chan_link(l, sk);
225
226 if (parent)
227 bt_accept_enqueue(parent, sk);
228}
229
230/* Delete channel.
231 * Must be called on the locked socket. */
232static void l2cap_chan_del(struct sock *sk, int err)
233{
234 struct l2cap_conn *conn = l2cap_pi(sk)->conn;
235 struct sock *parent = bt_sk(sk)->parent;
236
237 l2cap_sock_clear_timer(sk);
238
239 BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
240
241 if (conn) {
242 /* Unlink from channel list */
243 l2cap_chan_unlink(&conn->chan_list, sk);
244 l2cap_pi(sk)->conn = NULL;
245 hci_conn_put(conn->hcon);
246 }
247
248 sk->sk_state = BT_CLOSED;
249 sock_set_flag(sk, SOCK_ZAPPED);
250
251 if (err)
252 sk->sk_err = err;
253
254 if (parent) {
255 bt_accept_unlink(sk);
256 parent->sk_data_ready(parent, 0);
257 } else
258 sk->sk_state_change(sk);
259}
260
112/* ---- L2CAP connections ---- */ 261/* ---- L2CAP connections ---- */
113static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) 262static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status)
114{ 263{
115 struct l2cap_conn *conn; 264 struct l2cap_conn *conn = hcon->l2cap_data;
116
117 if ((conn = hcon->l2cap_data))
118 return conn;
119 265
120 if (status) 266 if (conn || status)
121 return conn; 267 return conn;
122 268
123 if (!(conn = kmalloc(sizeof(struct l2cap_conn), GFP_ATOMIC))) 269 conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC);
270 if (!conn)
124 return NULL; 271 return NULL;
125 memset(conn, 0, sizeof(struct l2cap_conn));
126 272
127 hcon->l2cap_data = conn; 273 hcon->l2cap_data = conn;
128 conn->hcon = hcon; 274 conn->hcon = hcon;
129 275
276 BT_DBG("hcon %p conn %p", hcon, conn);
277
130 conn->mtu = hcon->hdev->acl_mtu; 278 conn->mtu = hcon->hdev->acl_mtu;
131 conn->src = &hcon->hdev->bdaddr; 279 conn->src = &hcon->hdev->bdaddr;
132 conn->dst = &hcon->dst; 280 conn->dst = &hcon->dst;
@@ -134,17 +282,16 @@ static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status)
134 spin_lock_init(&conn->lock); 282 spin_lock_init(&conn->lock);
135 rwlock_init(&conn->chan_list.lock); 283 rwlock_init(&conn->chan_list.lock);
136 284
137 BT_DBG("hcon %p conn %p", hcon, conn);
138 return conn; 285 return conn;
139} 286}
140 287
141static int l2cap_conn_del(struct hci_conn *hcon, int err) 288static void l2cap_conn_del(struct hci_conn *hcon, int err)
142{ 289{
143 struct l2cap_conn *conn; 290 struct l2cap_conn *conn = hcon->l2cap_data;
144 struct sock *sk; 291 struct sock *sk;
145 292
146 if (!(conn = hcon->l2cap_data)) 293 if (!conn)
147 return 0; 294 return;
148 295
149 BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); 296 BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
150 297
@@ -161,7 +308,6 @@ static int l2cap_conn_del(struct hci_conn *hcon, int err)
161 308
162 hcon->l2cap_data = NULL; 309 hcon->l2cap_data = NULL;
163 kfree(conn); 310 kfree(conn);
164 return 0;
165} 311}
166 312
167static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) 313static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent)
@@ -925,160 +1071,6 @@ static int l2cap_sock_release(struct socket *sock)
925 return err; 1071 return err;
926} 1072}
927 1073
928/* ---- L2CAP channels ---- */
929static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid)
930{
931 struct sock *s;
932 for (s = l->head; s; s = l2cap_pi(s)->next_c) {
933 if (l2cap_pi(s)->dcid == cid)
934 break;
935 }
936 return s;
937}
938
939static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid)
940{
941 struct sock *s;
942 for (s = l->head; s; s = l2cap_pi(s)->next_c) {
943 if (l2cap_pi(s)->scid == cid)
944 break;
945 }
946 return s;
947}
948
949/* Find channel with given SCID.
950 * Returns locked socket */
951static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid)
952{
953 struct sock *s;
954 read_lock(&l->lock);
955 s = __l2cap_get_chan_by_scid(l, cid);
956 if (s) bh_lock_sock(s);
957 read_unlock(&l->lock);
958 return s;
959}
960
961static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident)
962{
963 struct sock *s;
964 for (s = l->head; s; s = l2cap_pi(s)->next_c) {
965 if (l2cap_pi(s)->ident == ident)
966 break;
967 }
968 return s;
969}
970
971static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident)
972{
973 struct sock *s;
974 read_lock(&l->lock);
975 s = __l2cap_get_chan_by_ident(l, ident);
976 if (s) bh_lock_sock(s);
977 read_unlock(&l->lock);
978 return s;
979}
980
981static u16 l2cap_alloc_cid(struct l2cap_chan_list *l)
982{
983 u16 cid = 0x0040;
984
985 for (; cid < 0xffff; cid++) {
986 if(!__l2cap_get_chan_by_scid(l, cid))
987 return cid;
988 }
989
990 return 0;
991}
992
993static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk)
994{
995 sock_hold(sk);
996
997 if (l->head)
998 l2cap_pi(l->head)->prev_c = sk;
999
1000 l2cap_pi(sk)->next_c = l->head;
1001 l2cap_pi(sk)->prev_c = NULL;
1002 l->head = sk;
1003}
1004
1005static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk)
1006{
1007 struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c;
1008
1009 write_lock(&l->lock);
1010 if (sk == l->head)
1011 l->head = next;
1012
1013 if (next)
1014 l2cap_pi(next)->prev_c = prev;
1015 if (prev)
1016 l2cap_pi(prev)->next_c = next;
1017 write_unlock(&l->lock);
1018
1019 __sock_put(sk);
1020}
1021
1022static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent)
1023{
1024 struct l2cap_chan_list *l = &conn->chan_list;
1025
1026 BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid);
1027
1028 l2cap_pi(sk)->conn = conn;
1029
1030 if (sk->sk_type == SOCK_SEQPACKET) {
1031 /* Alloc CID for connection-oriented socket */
1032 l2cap_pi(sk)->scid = l2cap_alloc_cid(l);
1033 } else if (sk->sk_type == SOCK_DGRAM) {
1034 /* Connectionless socket */
1035 l2cap_pi(sk)->scid = 0x0002;
1036 l2cap_pi(sk)->dcid = 0x0002;
1037 l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU;
1038 } else {
1039 /* Raw socket can send/recv signalling messages only */
1040 l2cap_pi(sk)->scid = 0x0001;
1041 l2cap_pi(sk)->dcid = 0x0001;
1042 l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU;
1043 }
1044
1045 __l2cap_chan_link(l, sk);
1046
1047 if (parent)
1048 bt_accept_enqueue(parent, sk);
1049}
1050
1051/* Delete channel.
1052 * Must be called on the locked socket. */
1053static void l2cap_chan_del(struct sock *sk, int err)
1054{
1055 struct l2cap_conn *conn = l2cap_pi(sk)->conn;
1056 struct sock *parent = bt_sk(sk)->parent;
1057
1058 l2cap_sock_clear_timer(sk);
1059
1060 BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
1061
1062 if (conn) {
1063 /* Unlink from channel list */
1064 l2cap_chan_unlink(&conn->chan_list, sk);
1065 l2cap_pi(sk)->conn = NULL;
1066 hci_conn_put(conn->hcon);
1067 }
1068
1069 sk->sk_state = BT_CLOSED;
1070 sock_set_flag(sk, SOCK_ZAPPED);
1071
1072 if (err)
1073 sk->sk_err = err;
1074
1075 if (parent) {
1076 bt_accept_unlink(sk);
1077 parent->sk_data_ready(parent, 0);
1078 } else
1079 sk->sk_state_change(sk);
1080}
1081
1082static void l2cap_conn_ready(struct l2cap_conn *conn) 1074static void l2cap_conn_ready(struct l2cap_conn *conn)
1083{ 1075{
1084 struct l2cap_chan_list *l = &conn->chan_list; 1076 struct l2cap_chan_list *l = &conn->chan_list;
@@ -1834,7 +1826,9 @@ drop:
1834 kfree_skb(skb); 1826 kfree_skb(skb);
1835 1827
1836done: 1828done:
1837 if (sk) bh_unlock_sock(sk); 1829 if (sk)
1830 bh_unlock_sock(sk);
1831
1838 return 0; 1832 return 0;
1839} 1833}
1840 1834
@@ -1925,18 +1919,18 @@ static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
1925 1919
1926static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) 1920static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status)
1927{ 1921{
1922 struct l2cap_conn *conn;
1923
1928 BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); 1924 BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status);
1929 1925
1930 if (hcon->type != ACL_LINK) 1926 if (hcon->type != ACL_LINK)
1931 return 0; 1927 return 0;
1932 1928
1933 if (!status) { 1929 if (!status) {
1934 struct l2cap_conn *conn;
1935
1936 conn = l2cap_conn_add(hcon, status); 1930 conn = l2cap_conn_add(hcon, status);
1937 if (conn) 1931 if (conn)
1938 l2cap_conn_ready(conn); 1932 l2cap_conn_ready(conn);
1939 } else 1933 } else
1940 l2cap_conn_del(hcon, bt_err(status)); 1934 l2cap_conn_del(hcon, bt_err(status));
1941 1935
1942 return 0; 1936 return 0;
@@ -1950,19 +1944,21 @@ static int l2cap_disconn_ind(struct hci_conn *hcon, u8 reason)
1950 return 0; 1944 return 0;
1951 1945
1952 l2cap_conn_del(hcon, bt_err(reason)); 1946 l2cap_conn_del(hcon, bt_err(reason));
1947
1953 return 0; 1948 return 0;
1954} 1949}
1955 1950
1956static int l2cap_auth_cfm(struct hci_conn *hcon, u8 status) 1951static int l2cap_auth_cfm(struct hci_conn *hcon, u8 status)
1957{ 1952{
1958 struct l2cap_chan_list *l; 1953 struct l2cap_chan_list *l;
1959 struct l2cap_conn *conn; 1954 struct l2cap_conn *conn = conn = hcon->l2cap_data;
1960 struct l2cap_conn_rsp rsp; 1955 struct l2cap_conn_rsp rsp;
1961 struct sock *sk; 1956 struct sock *sk;
1962 int result; 1957 int result;
1963 1958
1964 if (!(conn = hcon->l2cap_data)) 1959 if (!conn)
1965 return 0; 1960 return 0;
1961
1966 l = &conn->chan_list; 1962 l = &conn->chan_list;
1967 1963
1968 BT_DBG("conn %p", conn); 1964 BT_DBG("conn %p", conn);
@@ -2005,13 +2001,14 @@ static int l2cap_auth_cfm(struct hci_conn *hcon, u8 status)
2005static int l2cap_encrypt_cfm(struct hci_conn *hcon, u8 status) 2001static int l2cap_encrypt_cfm(struct hci_conn *hcon, u8 status)
2006{ 2002{
2007 struct l2cap_chan_list *l; 2003 struct l2cap_chan_list *l;
2008 struct l2cap_conn *conn; 2004 struct l2cap_conn *conn = hcon->l2cap_data;
2009 struct l2cap_conn_rsp rsp; 2005 struct l2cap_conn_rsp rsp;
2010 struct sock *sk; 2006 struct sock *sk;
2011 int result; 2007 int result;
2012 2008
2013 if (!(conn = hcon->l2cap_data)) 2009 if (!conn)
2014 return 0; 2010 return 0;
2011
2015 l = &conn->chan_list; 2012 l = &conn->chan_list;
2016 2013
2017 BT_DBG("conn %p", conn); 2014 BT_DBG("conn %p", conn);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-16 01:48:43 -0500