From 9f2c8a03fbb3048cf38b158f87aa0c3c09bca084 Mon Sep 17 00:00:00 2001 From: Marcel Holtmann Date: Thu, 15 Jan 2009 21:58:40 +0100 Subject: [PATCH] Bluetooth: Replace RFCOMM link mode with security level Change the RFCOMM internals to use the new security levels and remove the link mode details. Signed-off-by: Marcel Holtmann --- include/net/bluetooth/rfcomm.h | 7 ++-- net/bluetooth/rfcomm/core.c | 28 ++++--------- net/bluetooth/rfcomm/sock.c | 75 ++++++++++++++++++++++++++++++---- 3 files changed, 79 insertions(+), 31 deletions(-) diff --git a/include/net/bluetooth/rfcomm.h b/include/net/bluetooth/rfcomm.h index 71b45f459687..bda68d833ddd 100644 --- a/include/net/bluetooth/rfcomm.h +++ b/include/net/bluetooth/rfcomm.h @@ -183,8 +183,8 @@ struct rfcomm_dlc { u8 remote_v24_sig; u8 mscex; u8 out; - - u32 link_mode; + u8 sec_level; + u8 role_switch; u32 defer_setup; uint mtu; @@ -307,7 +307,8 @@ struct rfcomm_pinfo { struct bt_sock bt; struct rfcomm_dlc *dlc; u8 channel; - u32 link_mode; + u8 sec_level; + u8 role_switch; }; int rfcomm_init_sockets(void); diff --git a/net/bluetooth/rfcomm/core.c b/net/bluetooth/rfcomm/core.c index 68f70c5270c6..db83f92d274c 100644 --- a/net/bluetooth/rfcomm/core.c +++ b/net/bluetooth/rfcomm/core.c @@ -223,21 +223,11 @@ static int rfcomm_l2sock_create(struct socket **sock) return err; } -static inline int rfcomm_check_link_mode(struct rfcomm_dlc *d) +static inline int rfcomm_check_security(struct rfcomm_dlc *d) { struct sock *sk = d->session->sock->sk; - struct l2cap_conn *conn = l2cap_pi(sk)->conn; - if (d->link_mode & RFCOMM_LM_SECURE) - return hci_conn_security(conn->hcon, BT_SECURITY_HIGH); - - if (d->link_mode & RFCOMM_LM_ENCRYPT) - return hci_conn_security(conn->hcon, BT_SECURITY_MEDIUM); - - if (d->link_mode & RFCOMM_LM_AUTH) - return hci_conn_security(conn->hcon, BT_SECURITY_LOW); - - return 1; + return hci_conn_security(l2cap_pi(sk)->conn->hcon, d->sec_level); } /* ---- RFCOMM DLCs ---- */ @@ -390,7 +380,7 @@ static int __rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, d->cfc = (s->cfc == RFCOMM_CFC_UNKNOWN) ? 0 : s->cfc; if (s->state == BT_CONNECTED) { - if (rfcomm_check_link_mode(d)) + if (rfcomm_check_security(d)) rfcomm_send_pn(s, 1, d); else set_bit(RFCOMM_AUTH_PENDING, &d->flags); @@ -1192,7 +1182,7 @@ void rfcomm_dlc_accept(struct rfcomm_dlc *d) d->state_change(d, 0); rfcomm_dlc_unlock(d); - if (d->link_mode & RFCOMM_LM_MASTER) + if (d->role_switch) hci_conn_switch_role(l2cap_pi(sk)->conn->hcon, 0x00); rfcomm_send_msc(d->session, 1, d->dlci, d->v24_sig); @@ -1200,7 +1190,7 @@ void rfcomm_dlc_accept(struct rfcomm_dlc *d) static void rfcomm_check_accept(struct rfcomm_dlc *d) { - if (rfcomm_check_link_mode(d)) { + if (rfcomm_check_security(d)) { if (d->defer_setup) { set_bit(RFCOMM_DEFER_SETUP, &d->flags); rfcomm_dlc_set_timer(d, RFCOMM_AUTH_TIMEOUT); @@ -1660,7 +1650,7 @@ static void rfcomm_process_connect(struct rfcomm_session *s) d = list_entry(p, struct rfcomm_dlc, list); if (d->state == BT_CONFIG) { d->mtu = s->mtu; - if (rfcomm_check_link_mode(d)) { + if (rfcomm_check_security(d)) { rfcomm_send_pn(s, 1, d); } else { set_bit(RFCOMM_AUTH_PENDING, &d->flags); @@ -1748,10 +1738,6 @@ static inline void rfcomm_process_dlcs(struct rfcomm_session *s) } else rfcomm_dlc_accept(d); } - if (d->link_mode & RFCOMM_LM_SECURE) { - struct sock *sk = s->sock->sk; - hci_conn_change_link_key(l2cap_pi(sk)->conn->hcon); - } continue; } else if (test_and_clear_bit(RFCOMM_AUTH_REJECT, &d->flags)) { rfcomm_dlc_clear_timer(d); @@ -1994,7 +1980,7 @@ static void rfcomm_security_cfm(struct hci_conn *conn, u8 status, u8 encrypt) d = list_entry(p, struct rfcomm_dlc, list); if (!status && encrypt == 0x00 && - (d->link_mode & RFCOMM_LM_ENCRYPT) && + d->sec_level == BT_SECURITY_HIGH && (d->state == BT_CONNECTED || d->state == BT_CONFIG)) { __rfcomm_dlc_close(d, ECONNREFUSED); diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c index d37a829a81e4..9986ef35c890 100644 --- a/net/bluetooth/rfcomm/sock.c +++ b/net/bluetooth/rfcomm/sock.c @@ -261,14 +261,19 @@ static void rfcomm_sock_init(struct sock *sk, struct sock *parent) if (parent) { sk->sk_type = parent->sk_type; - pi->link_mode = rfcomm_pi(parent)->link_mode; pi->dlc->defer_setup = bt_sk(parent)->defer_setup; + + pi->sec_level = rfcomm_pi(parent)->sec_level; + pi->role_switch = rfcomm_pi(parent)->role_switch; } else { - pi->link_mode = 0; pi->dlc->defer_setup = 0; + + pi->sec_level = BT_SECURITY_LOW; + pi->role_switch = 0; } - pi->dlc->link_mode = pi->link_mode; + pi->dlc->sec_level = pi->sec_level; + pi->dlc->role_switch = pi->role_switch; } static struct proto rfcomm_proto = { @@ -408,7 +413,8 @@ static int rfcomm_sock_connect(struct socket *sock, struct sockaddr *addr, int a bacpy(&bt_sk(sk)->dst, &sa->rc_bdaddr); rfcomm_pi(sk)->channel = sa->rc_channel; - d->link_mode = rfcomm_pi(sk)->link_mode; + d->sec_level = rfcomm_pi(sk)->sec_level; + d->role_switch = rfcomm_pi(sk)->role_switch; err = rfcomm_dlc_open(d, &bt_sk(sk)->src, &sa->rc_bdaddr, sa->rc_channel); if (!err) @@ -741,7 +747,14 @@ static int rfcomm_sock_setsockopt_old(struct socket *sock, int optname, char __u break; } - rfcomm_pi(sk)->link_mode = opt; + if (opt & RFCOMM_LM_AUTH) + rfcomm_pi(sk)->sec_level = BT_SECURITY_LOW; + if (opt & RFCOMM_LM_ENCRYPT) + rfcomm_pi(sk)->sec_level = BT_SECURITY_MEDIUM; + if (opt & RFCOMM_LM_SECURE) + rfcomm_pi(sk)->sec_level = BT_SECURITY_HIGH; + + rfcomm_pi(sk)->role_switch = (opt & RFCOMM_LM_MASTER); break; default: @@ -756,7 +769,8 @@ static int rfcomm_sock_setsockopt_old(struct socket *sock, int optname, char __u static int rfcomm_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen) { struct sock *sk = sock->sk; - int err = 0; + struct bt_security sec; + int len, err = 0; u32 opt; BT_DBG("sk %p", sk); @@ -767,6 +781,23 @@ static int rfcomm_sock_setsockopt(struct socket *sock, int level, int optname, c lock_sock(sk); switch (optname) { + case BT_SECURITY: + sec.level = BT_SECURITY_LOW; + + len = min_t(unsigned int, sizeof(sec), optlen); + if (copy_from_user((char *) &sec, optval, len)) { + err = -EFAULT; + break; + } + + if (sec.level > BT_SECURITY_HIGH) { + err = -EINVAL; + break; + } + + rfcomm_pi(sk)->sec_level = sec.level; + break; + case BT_DEFER_SETUP: if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { err = -EINVAL; @@ -796,6 +827,7 @@ static int rfcomm_sock_getsockopt_old(struct socket *sock, int optname, char __u struct sock *l2cap_sk; struct rfcomm_conninfo cinfo; int len, err = 0; + u32 opt; BT_DBG("sk %p", sk); @@ -806,7 +838,26 @@ static int rfcomm_sock_getsockopt_old(struct socket *sock, int optname, char __u switch (optname) { case RFCOMM_LM: - if (put_user(rfcomm_pi(sk)->link_mode, (u32 __user *) optval)) + switch (rfcomm_pi(sk)->sec_level) { + case BT_SECURITY_LOW: + opt = RFCOMM_LM_AUTH; + break; + case BT_SECURITY_MEDIUM: + opt = RFCOMM_LM_AUTH | RFCOMM_LM_ENCRYPT; + break; + case BT_SECURITY_HIGH: + opt = RFCOMM_LM_AUTH | RFCOMM_LM_ENCRYPT | + RFCOMM_LM_SECURE; + break; + default: + opt = 0; + break; + } + + if (rfcomm_pi(sk)->role_switch) + opt |= RFCOMM_LM_MASTER; + + if (put_user(opt, (u32 __user *) optval)) err = -EFAULT; break; @@ -840,6 +891,7 @@ static int rfcomm_sock_getsockopt_old(struct socket *sock, int optname, char __u static int rfcomm_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) { struct sock *sk = sock->sk; + struct bt_security sec; int len, err = 0; BT_DBG("sk %p", sk); @@ -853,6 +905,15 @@ static int rfcomm_sock_getsockopt(struct socket *sock, int level, int optname, c lock_sock(sk); switch (optname) { + case BT_SECURITY: + sec.level = rfcomm_pi(sk)->sec_level; + + len = min_t(unsigned int, len, sizeof(sec)); + if (copy_to_user(optval, (char *) &sec, len)) + err = -EFAULT; + + break; + case BT_DEFER_SETUP: if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { err = -EINVAL; -- 2.30.2