1 /*
2 * File: pep.h
3 *
4 * Phonet Pipe End Point sockets definitions
5 *
6 * Copyright (C) 2008 Nokia Corporation.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA
21 */
22
23 #ifndef NET_PHONET_PEP_H
24 #define NET_PHONET_PEP_H
25
26 struct pep_sock {
27 struct pn_sock pn_sk;
28
29 /* XXX: union-ify listening vs connected stuff ? */
30 /* Listening socket stuff: */
31 struct hlist_head hlist;
32
33 /* Connected socket stuff: */
34 struct sock *listener;
35 struct sk_buff_head ctrlreq_queue;
36 #define PNPIPE_CTRLREQ_MAX 10
37 atomic_t tx_credits;
38 int ifindex;
39 u16 peer_type; /* peer type/subtype */
40 u8 pipe_handle;
41
42 u8 rx_credits;
43 u8 rx_fc; /* RX flow control */
44 u8 tx_fc; /* TX flow control */
45 u8 init_enable; /* auto-enable at creation */
46 u8 aligned;
47 };
48
pep_sk(struct sock * sk)49 static inline struct pep_sock *pep_sk(struct sock *sk)
50 {
51 return (struct pep_sock *)sk;
52 }
53
54 extern const struct proto_ops phonet_stream_ops;
55
56 /* Pipe protocol definitions */
57 struct pnpipehdr {
58 u8 utid; /* transaction ID */
59 u8 message_id;
60 u8 pipe_handle;
61 union {
62 u8 state_after_connect; /* connect request */
63 u8 state_after_reset; /* reset request */
64 u8 error_code; /* any response */
65 u8 pep_type; /* status indication */
66 u8 data[1];
67 };
68 };
69 #define other_pep_type data[1]
70
pnp_hdr(struct sk_buff * skb)71 static inline struct pnpipehdr *pnp_hdr(struct sk_buff *skb)
72 {
73 return (struct pnpipehdr *)skb_transport_header(skb);
74 }
75
76 #define MAX_PNPIPE_HEADER (MAX_PHONET_HEADER + 4)
77
78 enum {
79 PNS_PIPE_CREATE_REQ = 0x00,
80 PNS_PIPE_CREATE_RESP,
81 PNS_PIPE_REMOVE_REQ,
82 PNS_PIPE_REMOVE_RESP,
83
84 PNS_PIPE_DATA = 0x20,
85 PNS_PIPE_ALIGNED_DATA,
86
87 PNS_PEP_CONNECT_REQ = 0x40,
88 PNS_PEP_CONNECT_RESP,
89 PNS_PEP_DISCONNECT_REQ,
90 PNS_PEP_DISCONNECT_RESP,
91 PNS_PEP_RESET_REQ,
92 PNS_PEP_RESET_RESP,
93 PNS_PEP_ENABLE_REQ,
94 PNS_PEP_ENABLE_RESP,
95 PNS_PEP_CTRL_REQ,
96 PNS_PEP_CTRL_RESP,
97 PNS_PEP_DISABLE_REQ = 0x4C,
98 PNS_PEP_DISABLE_RESP,
99
100 PNS_PEP_STATUS_IND = 0x60,
101 PNS_PIPE_CREATED_IND,
102 PNS_PIPE_RESET_IND = 0x63,
103 PNS_PIPE_ENABLED_IND,
104 PNS_PIPE_REDIRECTED_IND,
105 PNS_PIPE_DISABLED_IND = 0x66,
106 };
107
108 #define PN_PIPE_INVALID_HANDLE 0xff
109 #define PN_PEP_TYPE_COMMON 0x00
110
111 /* Phonet pipe status indication */
112 enum {
113 PN_PEP_IND_FLOW_CONTROL,
114 PN_PEP_IND_ID_MCFC_GRANT_CREDITS,
115 };
116
117 /* Phonet pipe error codes */
118 enum {
119 PN_PIPE_NO_ERROR,
120 PN_PIPE_ERR_INVALID_PARAM,
121 PN_PIPE_ERR_INVALID_HANDLE,
122 PN_PIPE_ERR_INVALID_CTRL_ID,
123 PN_PIPE_ERR_NOT_ALLOWED,
124 PN_PIPE_ERR_PEP_IN_USE,
125 PN_PIPE_ERR_OVERLOAD,
126 PN_PIPE_ERR_DEV_DISCONNECTED,
127 PN_PIPE_ERR_TIMEOUT,
128 PN_PIPE_ERR_ALL_PIPES_IN_USE,
129 PN_PIPE_ERR_GENERAL,
130 PN_PIPE_ERR_NOT_SUPPORTED,
131 };
132
133 /* Phonet pipe states */
134 enum {
135 PN_PIPE_DISABLE,
136 PN_PIPE_ENABLE,
137 };
138
139 /* Phonet pipe sub-block types */
140 enum {
141 PN_PIPE_SB_CREATE_REQ_PEP_SUB_TYPE,
142 PN_PIPE_SB_CONNECT_REQ_PEP_SUB_TYPE,
143 PN_PIPE_SB_REDIRECT_REQ_PEP_SUB_TYPE,
144 PN_PIPE_SB_NEGOTIATED_FC,
145 PN_PIPE_SB_REQUIRED_FC_TX,
146 PN_PIPE_SB_PREFERRED_FC_RX,
147 PN_PIPE_SB_ALIGNED_DATA,
148 };
149
150 /* Phonet pipe flow control models */
151 enum {
152 PN_NO_FLOW_CONTROL,
153 PN_LEGACY_FLOW_CONTROL,
154 PN_ONE_CREDIT_FLOW_CONTROL,
155 PN_MULTI_CREDIT_FLOW_CONTROL,
156 PN_MAX_FLOW_CONTROL,
157 };
158
159 #define pn_flow_safe(fc) ((fc) >> 1)
160
161 /* Phonet pipe flow control states */
162 enum {
163 PEP_IND_EMPTY,
164 PEP_IND_BUSY,
165 PEP_IND_READY,
166 };
167
168 #endif
169