/src/core/libcfnet/protocol_version.h
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1 | | /* |
2 | | Copyright 2023 Northern.tech AS |
3 | | |
4 | | This file is part of CFEngine 3 - written and maintained by Northern.tech AS. |
5 | | |
6 | | This program is free software; you can redistribute it and/or modify it |
7 | | under the terms of the GNU General Public License as published by the |
8 | | Free Software Foundation; version 3. |
9 | | |
10 | | This program is distributed in the hope that it will be useful, |
11 | | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | | GNU General Public License for more details. |
14 | | |
15 | | You should have received a copy of the GNU General Public License |
16 | | along with this program; if not, write to the Free Software |
17 | | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
18 | | |
19 | | To the extent this program is licensed as part of the Enterprise |
20 | | versions of CFEngine, the applicable Commercial Open Source License |
21 | | (COSL) may apply to this file if you as a licensee so wish it. See |
22 | | included file COSL.txt. |
23 | | */ |
24 | | |
25 | | |
26 | | #ifndef CFENGINE_PROTOCOL_VERSION_H |
27 | | #define CFENGINE_PROTOCOL_VERSION_H |
28 | | |
29 | | /** |
30 | | Available protocol versions. When connection is initialised ProtocolVersion |
31 | | is 0, i.e. undefined. It is after the call to ServerConnection() that |
32 | | protocol version is decided, according to body copy_from and body common |
33 | | control. All protocol numbers are numbered incrementally starting from 1. |
34 | | */ |
35 | | typedef enum |
36 | | { |
37 | | CF_PROTOCOL_UNDEFINED = 0, |
38 | | CF_PROTOCOL_CLASSIC = 1, |
39 | | /* --- Greater versions use TLS as secure communications layer --- */ |
40 | | CF_PROTOCOL_TLS = 2, |
41 | | CF_PROTOCOL_COOKIE = 3, |
42 | | } ProtocolVersion; |
43 | | |
44 | | /* We use CF_PROTOCOL_LATEST as the default for new connections. */ |
45 | | #define CF_PROTOCOL_LATEST CF_PROTOCOL_COOKIE |
46 | | |
47 | | static inline const char *ProtocolVersionString(const ProtocolVersion p) |
48 | 0 | { |
49 | 0 | switch (p) |
50 | 0 | { |
51 | 0 | case CF_PROTOCOL_COOKIE: |
52 | 0 | return "cookie"; |
53 | 0 | case CF_PROTOCOL_TLS: |
54 | 0 | return "tls"; |
55 | 0 | case CF_PROTOCOL_CLASSIC: |
56 | 0 | return "classic"; |
57 | 0 | default: |
58 | 0 | return "undefined"; |
59 | 0 | } |
60 | 0 | } |
61 | | |
62 | | static inline bool ProtocolIsKnown(const ProtocolVersion p) |
63 | 0 | { |
64 | 0 | return ((p > CF_PROTOCOL_UNDEFINED) && (p <= CF_PROTOCOL_LATEST)); |
65 | 0 | } |
66 | | |
67 | | static inline bool ProtocolIsTLS(const ProtocolVersion p) |
68 | 0 | { |
69 | 0 | return ((p >= CF_PROTOCOL_TLS) && (p <= CF_PROTOCOL_LATEST)); |
70 | 0 | } |
71 | | |
72 | | static inline bool ProtocolIsTooNew(const ProtocolVersion p) |
73 | 0 | { |
74 | 0 | return (p > CF_PROTOCOL_LATEST); |
75 | 0 | } |
76 | | |
77 | | static inline bool ProtocolIsUndefined(const ProtocolVersion p) |
78 | 0 | { |
79 | 0 | return (p <= CF_PROTOCOL_UNDEFINED); |
80 | 0 | } |
81 | | |
82 | | static inline bool ProtocolIsClassic(const ProtocolVersion p) |
83 | 0 | { |
84 | 0 | return (p == CF_PROTOCOL_CLASSIC); |
85 | 0 | } |
86 | | |
87 | | static inline bool ProtocolTerminateCSV(const ProtocolVersion p) |
88 | 0 | { |
89 | 0 | return (p < CF_PROTOCOL_COOKIE); |
90 | 0 | } |
91 | | |
92 | | /** |
93 | | * Returns CF_PROTOCOL_TLS or CF_PROTOCOL_CLASSIC (or CF_PROTOCOL_UNDEFINED) |
94 | | * Maps all versions using TLS to CF_PROTOCOL_TLS for convenience |
95 | | * in switch statements. |
96 | | */ |
97 | | static inline ProtocolVersion ProtocolClassicOrTLS(const ProtocolVersion p) |
98 | 0 | { |
99 | 0 | if (ProtocolIsTLS(p)) |
100 | 0 | { |
101 | 0 | return CF_PROTOCOL_TLS; |
102 | 0 | } |
103 | 0 | if (ProtocolIsClassic(p)) |
104 | 0 | { |
105 | 0 | return CF_PROTOCOL_CLASSIC; |
106 | 0 | } |
107 | 0 | return CF_PROTOCOL_UNDEFINED; |
108 | 0 | } |
109 | | |
110 | | /** |
111 | | * Parses the version string sent over network to enum, e.g. "CFE_v1" -> 1 |
112 | | */ |
113 | | ProtocolVersion ParseProtocolVersionNetwork(const char *s); |
114 | | |
115 | | /** |
116 | | * Parses the version string set in policy to enum, e.g. "classic" -> 1 |
117 | | */ |
118 | | ProtocolVersion ParseProtocolVersionPolicy(const char *s); |
119 | | |
120 | | // Old name for compatibility (enterprise), TODO remove: |
121 | | #define ProtocolVersionParse ParseProtocolVersionPolicy |
122 | | |
123 | | #endif // CFENGINE_PROTOCOL_VERSION_H |