diff options
Diffstat (limited to 'net/phonet/pep.c')
| -rw-r--r-- | net/phonet/pep.c | 448 |
1 files changed, 442 insertions, 6 deletions
diff --git a/net/phonet/pep.c b/net/phonet/pep.c index d0e7eb24c8b9..7bf23cf36b02 100644 --- a/net/phonet/pep.c +++ b/net/phonet/pep.c @@ -88,6 +88,15 @@ static int pep_reply(struct sock *sk, struct sk_buff *oskb, const struct pnpipehdr *oph = pnp_hdr(oskb); struct pnpipehdr *ph; struct sk_buff *skb; +#ifdef CONFIG_PHONET_PIPECTRLR + const struct phonethdr *hdr = pn_hdr(oskb); + struct sockaddr_pn spn = { + .spn_family = AF_PHONET, + .spn_resource = 0xD9, + .spn_dev = hdr->pn_sdev, + .spn_obj = hdr->pn_sobj, + }; +#endif skb = alloc_skb(MAX_PNPIPE_HEADER + len, priority); if (!skb) @@ -105,10 +114,271 @@ static int pep_reply(struct sock *sk, struct sk_buff *oskb, ph->pipe_handle = oph->pipe_handle; ph->error_code = code; +#ifdef CONFIG_PHONET_PIPECTRLR + return pn_skb_send(sk, skb, &spn); +#else return pn_skb_send(sk, skb, &pipe_srv); +#endif } #define PAD 0x00 + +#ifdef CONFIG_PHONET_PIPECTRLR +static u8 pipe_negotiate_fc(u8 *host_fc, u8 *remote_fc, int len) +{ + int i, j; + u8 base_fc, final_fc; + + for (i = 0; i < len; i++) { + base_fc = host_fc[i]; + for (j = 0; j < len; j++) { + if (remote_fc[j] == base_fc) { + final_fc = base_fc; + goto done; + } + } + } + return -EINVAL; + +done: + return final_fc; + +} + +static int pipe_get_flow_info(struct sock *sk, struct sk_buff *skb, + u8 *pref_rx_fc, u8 *req_tx_fc) +{ + struct pnpipehdr *hdr; + u8 n_sb; + + if (!pskb_may_pull(skb, sizeof(*hdr) + 4)) + return -EINVAL; + + hdr = pnp_hdr(skb); + n_sb = hdr->data[4]; + + __skb_pull(skb, sizeof(*hdr) + 4); + while (n_sb > 0) { + u8 type, buf[3], len = sizeof(buf); + u8 *data = pep_get_sb(skb, &type, &len, buf); + + if (data == NULL) + return -EINVAL; + + switch (type) { + case PN_PIPE_SB_REQUIRED_FC_TX: + if (len < 3 || (data[2] | data[3] | data[4]) > 3) + break; + req_tx_fc[0] = data[2]; + req_tx_fc[1] = data[3]; + req_tx_fc[2] = data[4]; + break; + + case PN_PIPE_SB_PREFERRED_FC_RX: + if (len < 3 || (data[2] | data[3] | data[4]) > 3) + break; + pref_rx_fc[0] = data[2]; + pref_rx_fc[1] = data[3]; + pref_rx_fc[2] = data[4]; + break; + + } + n_sb--; + } + return 0; +} + +static int pipe_handler_send_req(struct sock *sk, u16 dobj, u8 utid, + u8 msg_id, u8 p_handle, gfp_t priority) +{ + int len; + struct pnpipehdr *ph; + struct sk_buff *skb; + struct sockaddr_pn spn = { + .spn_family = AF_PHONET, + .spn_resource = 0xD9, + .spn_dev = pn_dev(dobj), + .spn_obj = pn_obj(dobj), + }; + + static const u8 data[4] = { + PAD, PAD, PAD, PAD, + }; + + switch (msg_id) { + case PNS_PEP_CONNECT_REQ: + len = sizeof(data); + break; + + case PNS_PEP_DISCONNECT_REQ: + case PNS_PEP_ENABLE_REQ: + case PNS_PEP_DISABLE_REQ: + len = 0; + break; + + default: + return -EINVAL; + } + + skb = alloc_skb(MAX_PNPIPE_HEADER + len, priority); + if (!skb) + return -ENOMEM; + skb_set_owner_w(skb, sk); + + skb_reserve(skb, MAX_PNPIPE_HEADER); + if (len) { + __skb_put(skb, len); + skb_copy_to_linear_data(skb, data, len); + } + __skb_push(skb, sizeof(*ph)); + skb_reset_transport_header(skb); + ph = pnp_hdr(skb); + ph->utid = utid; + ph->message_id = msg_id; + ph->pipe_handle = p_handle; + ph->error_code = PN_PIPE_NO_ERROR; + + return pn_skb_send(sk, skb, &spn); +} + +static int pipe_handler_send_created_ind(struct sock *sk, u16 dobj, + u8 utid, u8 p_handle, u8 msg_id, u8 tx_fc, u8 rx_fc) +{ + int err_code; + struct pnpipehdr *ph; + struct sk_buff *skb; + struct sockaddr_pn spn = { + .spn_family = AF_PHONET, + .spn_resource = 0xD9, + .spn_dev = pn_dev(dobj), + .spn_obj = pn_obj(dobj), + }; + + static u8 data[4] = { + 0x03, 0x04, + }; + data[2] = tx_fc; + data[3] = rx_fc; + + /* + * actually, below is number of sub-blocks and not error code. + * Pipe_created_ind message format does not have any + * error code field. However, the Phonet stack will always send + * an error code as part of pnpipehdr. So, use that err_code to + * specify the number of sub-blocks. + */ + err_code = 0x01; + + skb = alloc_skb(MAX_PNPIPE_HEADER + sizeof(data), GFP_ATOMIC); + if (!skb) + return -ENOMEM; + skb_set_owner_w(skb, sk); + + skb_reserve(skb, MAX_PNPIPE_HEADER); + __skb_put(skb, sizeof(data)); + skb_copy_to_linear_data(skb, data, sizeof(data)); + __skb_push(skb, sizeof(*ph)); + skb_reset_transport_header(skb); + ph = pnp_hdr(skb); + ph->utid = utid; + ph->message_id = msg_id; + ph->pipe_handle = p_handle; + ph->error_code = err_code; + + return pn_skb_send(sk, skb, &spn); +} + +static int pipe_handler_send_ind(struct sock *sk, u16 dobj, u8 utid, + u8 p_handle, u8 msg_id) +{ + int err_code; + struct pnpipehdr *ph; + struct sk_buff *skb; + struct sockaddr_pn spn = { + .spn_family = AF_PHONET, + .spn_resource = 0xD9, + .spn_dev = pn_dev(dobj), + .spn_obj = pn_obj(dobj), + }; + + /* + * actually, below is a filler. + * Pipe_enabled/disabled_ind message format does not have any + * error code field. However, the Phonet stack will always send + * an error code as part of pnpipehdr. So, use that err_code to + * specify the filler value. + */ + err_code = 0x0; + + skb = alloc_skb(MAX_PNPIPE_HEADER, GFP_ATOMIC); + if (!skb) + return -ENOMEM; + skb_set_owner_w(skb, sk); + + skb_reserve(skb, MAX_PNPIPE_HEADER); + __skb_push(skb, sizeof(*ph)); + skb_reset_transport_header(skb); + ph = pnp_hdr(skb); + ph->utid = utid; + ph->message_id = msg_id; + ph->pipe_handle = p_handle; + ph->error_code = err_code; + + return pn_skb_send(sk, skb, &spn); +} + +static int pipe_handler_enable_pipe(struct sock *sk, int cmd) +{ + int ret; + struct pep_sock *pn = pep_sk(sk); + + switch (cmd) { + case PNPIPE_ENABLE: + ret = pipe_handler_send_req(sk, pn->pn_sk.sobject, + PNS_PIPE_ENABLE_UTID, PNS_PEP_ENABLE_REQ, + pn->pipe_handle, GFP_ATOMIC); + break; + + case PNPIPE_DISABLE: + ret = pipe_handler_send_req(sk, pn->pn_sk.sobject, + PNS_PIPE_DISABLE_UTID, PNS_PEP_DISABLE_REQ, + pn->pipe_handle, GFP_ATOMIC); + break; + + default: + ret = -EINVAL; + } + + return ret; +} + +static int pipe_handler_create_pipe(struct sock *sk, int pipe_handle, int cmd) +{ + int ret; + struct pep_sock *pn = pep_sk(sk); + + switch (cmd) { + case PNPIPE_CREATE: + ret = pipe_handler_send_req(sk, pn->pn_sk.sobject, + PNS_PEP_CONNECT_UTID, PNS_PEP_CONNECT_REQ, + pipe_handle, GFP_ATOMIC); + break; + + case PNPIPE_DESTROY: + ret = pipe_handler_send_req(sk, pn->remote_pep, + PNS_PEP_DISCONNECT_UTID, + PNS_PEP_DISCONNECT_REQ, + pn->pipe_handle, GFP_ATOMIC); + break; + + default: + ret = -EINVAL; + } + + return ret; +} +#endif + static int pep_accept_conn(struct sock *sk, struct sk_buff *skb) { static const u8 data[20] = { @@ -173,6 +443,14 @@ static int pipe_snd_status(struct sock *sk, u8 type, u8 status, gfp_t priority) struct pep_sock *pn = pep_sk(sk); struct pnpipehdr *ph; struct sk_buff *skb; +#ifdef CONFIG_PHONET_PIPECTRLR + struct sockaddr_pn spn = { + .spn_family = AF_PHONET, + .spn_resource = 0xD9, + .spn_dev = pn_dev(pn->remote_pep), + .spn_obj = pn_obj(pn->remote_pep), + }; +#endif skb = alloc_skb(MAX_PNPIPE_HEADER + 4, priority); if (!skb) @@ -192,7 +470,11 @@ static int pipe_snd_status(struct sock *sk, u8 type, u8 status, gfp_t priority) ph->data[3] = PAD; ph->data[4] = status; +#ifdef CONFIG_PHONET_PIPECTRLR + return pn_skb_send(sk, skb, &spn); +#else return pn_skb_send(sk, skb, &pipe_srv); +#endif } /* Send our RX flow control information to the sender. @@ -308,6 +590,12 @@ static int pipe_do_rcv(struct sock *sk, struct sk_buff *skb) struct pnpipehdr *hdr = pnp_hdr(skb); struct sk_buff_head *queue; int err = 0; +#ifdef CONFIG_PHONET_PIPECTRLR + struct phonethdr *ph = pn_hdr(skb); + static u8 host_pref_rx_fc[3], host_req_tx_fc[3]; + u8 remote_pref_rx_fc[3], remote_req_tx_fc[3]; + u8 negotiated_rx_fc, negotiated_tx_fc; +#endif BUG_ON(sk->sk_state == TCP_CLOSE_WAIT); @@ -316,6 +604,40 @@ static int pipe_do_rcv(struct sock *sk, struct sk_buff *skb) pep_reject_conn(sk, skb, PN_PIPE_ERR_PEP_IN_USE); break; +#ifdef CONFIG_PHONET_PIPECTRLR + case PNS_PEP_CONNECT_RESP: + if ((ph->pn_sdev == pn_dev(pn->remote_pep)) && + (ph->pn_sobj == pn_obj(pn->remote_pep))) { + pipe_get_flow_info(sk, skb, remote_pref_rx_fc, + remote_req_tx_fc); + + negotiated_tx_fc = pipe_negotiate_fc(remote_req_tx_fc, + host_pref_rx_fc, + sizeof(host_pref_rx_fc)); + negotiated_rx_fc = pipe_negotiate_fc(host_req_tx_fc, + remote_pref_rx_fc, + sizeof(host_pref_rx_fc)); + + pn->pipe_state = PIPE_DISABLED; + pipe_handler_send_created_ind(sk, pn->remote_pep, + PNS_PIPE_CREATED_IND_UTID, + pn->pipe_handle, PNS_PIPE_CREATED_IND, + negotiated_tx_fc, negotiated_rx_fc); + pipe_handler_send_created_ind(sk, pn->pn_sk.sobject, + PNS_PIPE_CREATED_IND_UTID, + pn->pipe_handle, PNS_PIPE_CREATED_IND, + negotiated_tx_fc, negotiated_rx_fc); + } else { + pipe_handler_send_req(sk, pn->remote_pep, + PNS_PEP_CONNECT_UTID, + PNS_PEP_CONNECT_REQ, pn->pipe_handle, + GFP_ATOMIC); + pipe_get_flow_info(sk, skb, host_pref_rx_fc, + host_req_tx_fc); + } + break; +#endif + case PNS_PEP_DISCONNECT_REQ: pep_reply(sk, skb, PN_PIPE_NO_ERROR, NULL, 0, GFP_ATOMIC); sk->sk_state = TCP_CLOSE_WAIT; @@ -323,11 +645,41 @@ static int pipe_do_rcv(struct sock *sk, struct sk_buff *skb) sk->sk_state_change(sk); break; +#ifdef CONFIG_PHONET_PIPECTRLR + case PNS_PEP_DISCONNECT_RESP: + pn->pipe_state = PIPE_IDLE; + pipe_handler_send_req(sk, pn->pn_sk.sobject, + PNS_PEP_DISCONNECT_UTID, + PNS_PEP_DISCONNECT_REQ, pn->pipe_handle, + GFP_KERNEL); + break; +#endif + case PNS_PEP_ENABLE_REQ: /* Wait for PNS_PIPE_(ENABLED|REDIRECTED)_IND */ pep_reply(sk, skb, PN_PIPE_NO_ERROR, NULL, 0, GFP_ATOMIC); break; +#ifdef CONFIG_PHONET_PIPECTRLR + case PNS_PEP_ENABLE_RESP: + if ((ph->pn_sdev == pn_dev(pn->remote_pep)) && + (ph->pn_sobj == pn_obj(pn->remote_pep))) { + pn->pipe_state = PIPE_ENABLED; + pipe_handler_send_ind(sk, pn->remote_pep, + PNS_PIPE_ENABLED_IND_UTID, + pn->pipe_handle, PNS_PIPE_ENABLED_IND); + pipe_handler_send_ind(sk, pn->pn_sk.sobject, + PNS_PIPE_ENABLED_IND_UTID, + pn->pipe_handle, PNS_PIPE_ENABLED_IND); + } else + pipe_handler_send_req(sk, pn->remote_pep, + PNS_PIPE_ENABLE_UTID, + PNS_PEP_ENABLE_REQ, pn->pipe_handle, + GFP_KERNEL); + + break; +#endif + case PNS_PEP_RESET_REQ: switch (hdr->state_after_reset) { case PN_PIPE_DISABLE: @@ -346,6 +698,27 @@ static int pipe_do_rcv(struct sock *sk, struct sk_buff *skb) pep_reply(sk, skb, PN_PIPE_NO_ERROR, NULL, 0, GFP_ATOMIC); break; +#ifdef CONFIG_PHONET_PIPECTRLR + case PNS_PEP_DISABLE_RESP: + if ((ph->pn_sdev == pn_dev(pn->remote_pep)) && + (ph->pn_sobj == pn_obj(pn->remote_pep))) { + pn->pipe_state = PIPE_DISABLED; + pipe_handler_send_ind(sk, pn->remote_pep, + PNS_PIPE_DISABLED_IND_UTID, + pn->pipe_handle, + PNS_PIPE_DISABLED_IND); + pipe_handler_send_ind(sk, pn->pn_sk.sobject, + PNS_PIPE_DISABLED_IND_UTID, + pn->pipe_handle, + PNS_PIPE_DISABLED_IND); + } else + pipe_handler_send_req(sk, pn->remote_pep, + PNS_PIPE_DISABLE_UTID, + PNS_PEP_DISABLE_REQ, pn->pipe_handle, + GFP_KERNEL); + break; +#endif + case PNS_PEP_CTRL_REQ: if (skb_queue_len(&pn->ctrlreq_queue) >= PNPIPE_CTRLREQ_MAX) { atomic_inc(&sk->sk_drops); @@ -519,6 +892,9 @@ static int pep_connreq_rcv(struct sock *sk, struct sk_buff *skb) newpn->rx_fc = newpn->tx_fc = PN_LEGACY_FLOW_CONTROL; newpn->init_enable = enabled; newpn->aligned = aligned; +#ifdef CONFIG_PHONET_PIPECTRLR + newpn->remote_pep = pn->remote_pep; +#endif BUG_ON(!skb_queue_empty(&newsk->sk_receive_queue)); skb_queue_head(&newsk->sk_receive_queue, skb); @@ -781,6 +1157,10 @@ static int pep_setsockopt(struct sock *sk, int level, int optname, { struct pep_sock *pn = pep_sk(sk); int val = 0, err = 0; +#ifdef CONFIG_PHONET_PIPECTRLR + int remote_pep; + int pipe_handle; +#endif if (level != SOL_PNPIPE) return -ENOPROTOOPT; @@ -791,6 +1171,48 @@ static int pep_setsockopt(struct sock *sk, int level, int optname, lock_sock(sk); switch (optname) { +#ifdef CONFIG_PHONET_PIPECTRLR + case PNPIPE_CREATE: + if (val) { + if (pn->pipe_state > PIPE_IDLE) { + err = -EFAULT; + break; + } + remote_pep = val & 0xFFFF; + pipe_handle = (val >> 16) & 0xFF; + pn->remote_pep = remote_pep; + err = pipe_handler_create_pipe(sk, pipe_handle, + PNPIPE_CREATE); + break; + } + + case PNPIPE_ENABLE: + if (pn->pipe_state != PIPE_DISABLED) { + err = -EFAULT; + break; + } + err = pipe_handler_enable_pipe(sk, PNPIPE_ENABLE); + break; + + case PNPIPE_DISABLE: + if (pn->pipe_state != PIPE_ENABLED) { + err = -EFAULT; + break; + } + + err = pipe_handler_enable_pipe(sk, PNPIPE_DISABLE); + break; + + case PNPIPE_DESTROY: + if (pn->pipe_state < PIPE_DISABLED) { + err = -EFAULT; + break; + } + + err = pipe_handler_create_pipe(sk, 0x0, PNPIPE_DESTROY); + break; +#endif + case PNPIPE_ENCAP: if (val && val != PNPIPE_ENCAP_IP) { err = -EINVAL; @@ -840,6 +1262,13 @@ static int pep_getsockopt(struct sock *sk, int level, int optname, case PNPIPE_ENCAP: val = pn->ifindex ? PNPIPE_ENCAP_IP : PNPIPE_ENCAP_NONE; break; + +#ifdef CONFIG_PHONET_PIPECTRLR + case PNPIPE_INQ: + val = pn->pipe_state; + break; +#endif + case PNPIPE_IFINDEX: val = pn->ifindex; break; @@ -859,7 +1288,14 @@ static int pipe_skb_send(struct sock *sk, struct sk_buff *skb) { struct pep_sock *pn = pep_sk(sk); struct pnpipehdr *ph; - int err; +#ifdef CONFIG_PHONET_PIPECTRLR + struct sockaddr_pn spn = { + .spn_family = AF_PHONET, + .spn_resource = 0xD9, + .spn_dev = pn_dev(pn->remote_pep), + .spn_obj = pn_obj(pn->remote_pep), + }; +#endif if (pn_flow_safe(pn->tx_fc) && !atomic_add_unless(&pn->tx_credits, -1, 0)) { @@ -877,11 +1313,11 @@ static int pipe_skb_send(struct sock *sk, struct sk_buff *skb) } else ph->message_id = PNS_PIPE_DATA; ph->pipe_handle = pn->pipe_handle; - - err = pn_skb_send(sk, skb, &pipe_srv); - if (err && pn_flow_safe(pn->tx_fc)) - atomic_inc(&pn->tx_credits); - return err; +#ifdef CONFIG_PHONET_PIPECTRLR + return pn_skb_send(sk, skb, &spn); +#else + return pn_skb_send(sk, skb, &pipe_srv); +#endif } static int pep_sendmsg(struct kiocb *iocb, struct sock *sk, |
