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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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