1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * File: pep.h
4 *
5 * Phonet Pipe End Point sockets definitions
6 *
7 * Copyright (C) 2008 Nokia Corporation.
8 */
9
10 #ifndef NET_PHONET_PEP_H
11 #define NET_PHONET_PEP_H
12
13 #include <linux/skbuff.h>
14 #include <net/phonet/phonet.h>
15
16 struct pep_sock {
17 struct pn_sock pn_sk;
18
19 /* XXX: union-ify listening vs connected stuff ? */
20 /* Listening socket stuff: */
21 struct hlist_head hlist;
22
23 /* Connected socket stuff: */
24 struct sock *listener;
25 struct sk_buff_head ctrlreq_queue;
26 #define PNPIPE_CTRLREQ_MAX 10
27 atomic_t tx_credits;
28 int ifindex;
29 u16 peer_type; /* peer type/subtype */
30 u8 pipe_handle;
31
32 u8 rx_credits;
33 u8 rx_fc; /* RX flow control */
34 u8 tx_fc; /* TX flow control */
35 u8 init_enable; /* auto-enable at creation */
36 u8 aligned;
37 };
38
39 static inline struct pep_sock *pep_sk(struct sock *sk)
40 {
41 return (struct pep_sock *)sk;
42 }
43
44 extern const struct proto_ops phonet_stream_ops;
45
46 /* Pipe protocol definitions */
47 struct pnpipehdr {
48 u8 utid; /* transaction ID */
49 u8 message_id;
50 u8 pipe_handle;
51 union {
52 u8 state_after_connect; /* connect request */
53 u8 state_after_reset; /* reset request */
54 u8 error_code; /* any response */
55 u8 pep_type; /* status indication */
56 u8 data0; /* anything else */
57 };
58 u8 data[];
59 };
60 #define other_pep_type data[0]
61
62 static inline struct pnpipehdr *pnp_hdr(struct sk_buff *skb)
63 {
64 return (struct pnpipehdr *)skb_transport_header(skb);
65 }
66
67 #define MAX_PNPIPE_HEADER (MAX_PHONET_HEADER + 4)
68
69 enum {
70 PNS_PIPE_CREATE_REQ = 0x00,
71 PNS_PIPE_CREATE_RESP,
72 PNS_PIPE_REMOVE_REQ,
73 PNS_PIPE_REMOVE_RESP,
74
75 PNS_PIPE_DATA = 0x20,
76 PNS_PIPE_ALIGNED_DATA,
77
78 PNS_PEP_CONNECT_REQ = 0x40,
79 PNS_PEP_CONNECT_RESP,
80 PNS_PEP_DISCONNECT_REQ,
81 PNS_PEP_DISCONNECT_RESP,
82 PNS_PEP_RESET_REQ,
83 PNS_PEP_RESET_RESP,
84 PNS_PEP_ENABLE_REQ,
85 PNS_PEP_ENABLE_RESP,
86 PNS_PEP_CTRL_REQ,
87 PNS_PEP_CTRL_RESP,
88 PNS_PEP_DISABLE_REQ = 0x4C,
89 PNS_PEP_DISABLE_RESP,
90
91 PNS_PEP_STATUS_IND = 0x60,
92 PNS_PIPE_CREATED_IND,
93 PNS_PIPE_RESET_IND = 0x63,
94 PNS_PIPE_ENABLED_IND,
95 PNS_PIPE_REDIRECTED_IND,
96 PNS_PIPE_DISABLED_IND = 0x66,
97 };
98
99 #define PN_PIPE_INVALID_HANDLE 0xff
100 #define PN_PEP_TYPE_COMMON 0x00
101
102 /* Phonet pipe status indication */
103 enum {
104 PN_PEP_IND_FLOW_CONTROL,
105 PN_PEP_IND_ID_MCFC_GRANT_CREDITS,
106 };
107
108 /* Phonet pipe error codes */
109 enum {
110 PN_PIPE_NO_ERROR,
111 PN_PIPE_ERR_INVALID_PARAM,
112 PN_PIPE_ERR_INVALID_HANDLE,
113 PN_PIPE_ERR_INVALID_CTRL_ID,
114 PN_PIPE_ERR_NOT_ALLOWED,
115 PN_PIPE_ERR_PEP_IN_USE,
116 PN_PIPE_ERR_OVERLOAD,
117 PN_PIPE_ERR_DEV_DISCONNECTED,
118 PN_PIPE_ERR_TIMEOUT,
119 PN_PIPE_ERR_ALL_PIPES_IN_USE,
120 PN_PIPE_ERR_GENERAL,
121 PN_PIPE_ERR_NOT_SUPPORTED,
122 };
123
124 /* Phonet pipe states */
125 enum {
126 PN_PIPE_DISABLE,
127 PN_PIPE_ENABLE,
128 };
129
130 /* Phonet pipe sub-block types */
131 enum {
132 PN_PIPE_SB_CREATE_REQ_PEP_SUB_TYPE,
133 PN_PIPE_SB_CONNECT_REQ_PEP_SUB_TYPE,
134 PN_PIPE_SB_REDIRECT_REQ_PEP_SUB_TYPE,
135 PN_PIPE_SB_NEGOTIATED_FC,
136 PN_PIPE_SB_REQUIRED_FC_TX,
137 PN_PIPE_SB_PREFERRED_FC_RX,
138 PN_PIPE_SB_ALIGNED_DATA,
139 };
140
141 /* Phonet pipe flow control models */
142 enum {
143 PN_NO_FLOW_CONTROL,
144 PN_LEGACY_FLOW_CONTROL,
145 PN_ONE_CREDIT_FLOW_CONTROL,
146 PN_MULTI_CREDIT_FLOW_CONTROL,
147 PN_MAX_FLOW_CONTROL,
148 };
149
150 #define pn_flow_safe(fc) ((fc) >> 1)
151
152 /* Phonet pipe flow control states */
153 enum {
154 PEP_IND_EMPTY,
155 PEP_IND_BUSY,
156 PEP_IND_READY,
157 };
158
159 #endif
160
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