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Contents of /ircd-hybrid/servlink/README

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Revision 33 - (show annotations)
Sun Oct 2 20:50:00 2005 UTC (14 years, 11 months ago) by knight
File size: 2480 byte(s)
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1 Servlink protocol documentation.
2 $Id$
3 --------------
4
5 After negotiating an incoming/outgoing server connection, the ircd will
6 fork, then execve servlink, with fd 0 as one end of a control pipe and
7 fd 1 as one end of a data pipe. fd 2 will be the socket connected to
8 the remote server.
9
10 The data pipe is used by the ircd to send/receive normal, decrypted,
11 uncompressed IRC commands to/from the remote server. The socket is used to
12 send the (processed) data to the remote server, and receive the data from
13 the remote server.
14
15 The control pipe is used to activate encryption/compression and to set the
16 encryption key/algorithm to be used.
17
18 Format of control messages:
19
20 <u8 command><optional data>
21
22 data format:
23 <u16 len><data>
24
25 Commands:
26
27 001 - SET_ZIP_OUT_LEVEL
28 data: yes
29 description:
30 set compression level (0 [use default, 6], or 1-9)
31
32 002 - START_ZIP_OUT
33 data: no
34 description:
35 all data written to the data pipe will be compressed
36 prior to being sent to the remote server.
37
38 003 - START_ZIP_IN
39 data: no
40 description:
41 all data not yet read from the slink program will be
42 decompressed before reading
43
44 004 - SET_CRYPT_IN_CIPHER
45 data: <u8 cipher id>
46
47 001 - BLOWFISH
48 002 - CAST
49 003 - DES
50 004 - 3DES
51 005 - IDEA
52 006 - RC5 ( 8 rounds)
53 007 - RC5 (12 rounds)
54 008 - RC5 (16 rounds)
55
56 cannot be called whilst decryption is active.
57
58 005 - SET_CRYPT_IN_KEY
59 data: <key>
60
61 cannot be called whilst decryption is active.
62
63 006 - START_CRYPT_IN
64
65 007 - SET_CRYPT_OUT_CIPHER
66 data: <u8 cipher id>
67
68 001 - BLOWFISH
69 002 - CAST
70 003 - DES
71 004 - 3DES
72 005 - IDEA
73 006 - RC5 ( 8 rounds)
74 007 - RC5 (12 rounds)
75 008 - RC5 (16 rounds)
76
77 cannot be called whilst encryption is active.
78
79 008 - SET_CRYPT_OUT_KEY
80 data: <key>
81
82 cannot be called whilst encryption is active.
83
84 009 - START_CRYPT_OUT
85
86 010 - INJECT_RECVQ
87 data: recvq
88
89 Used before INIT to inject any data read from the server fd which
90 should be pre-processed by servlink before being sent back
91 to the LOCAL_FD through the data fd.
92
93 011 - INJECT_SENDQ
94 data: sendq
95
96 As above, but sent to remote server without processing.
97
98 012 - INIT
99
100 013 - ZIPSTATS
101 request to send ziplinks statistics reply.
102
103 replies
104
105 001 - ERROR
106 data: u32 len/char error[len]
107
108 fatal error message.
109
110 002 - ZIPSTATS
111 data: u32 in/u32 in_wire/u32 out/u32 out_wire
112
113 ziplinks commpression statistics

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