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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: ident.h,v 1.3 2004/04/08 01:36:11 mdw Exp $ |
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4 | * |
5 | * Nonblocking RFC931 client |
6 | * |
7 | * (c) 1999 Mark Wooding |
8 | */ |
9 | |
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10 | /*----- Licensing notice --------------------------------------------------* |
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11 | * |
12 | * This file is part of the mLib utilities library. |
13 | * |
14 | * mLib is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU Library General Public License as |
16 | * published by the Free Software Foundation; either version 2 of the |
17 | * License, or (at your option) any later version. |
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18 | * |
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19 | * mLib is distributed in the hope that it will be useful, |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
22 | * GNU Library General Public License for more details. |
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23 | * |
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24 | * You should have received a copy of the GNU Library General Public |
25 | * License along with mLib; if not, write to the Free |
26 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
27 | * MA 02111-1307, USA. |
28 | */ |
29 | |
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30 | #ifndef MLIB_IDENT_H |
31 | #define MLIB_IDENT_H |
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32 | |
33 | #ifdef __cplusplus |
34 | extern "C" { |
35 | #endif |
36 | |
37 | /*----- Header files ------------------------------------------------------*/ |
38 | |
39 | #include <sys/types.h> |
40 | #include <sys/socket.h> |
41 | #include <netinet/in.h> |
42 | #include <arpa/inet.h> |
43 | |
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44 | #ifndef MLIB_CONN_H |
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45 | # include "conn.h" |
46 | #endif |
47 | |
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48 | #ifndef MLIB_SEL_H |
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49 | # include "sel.h" |
50 | #endif |
51 | |
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52 | #ifndef MLIB_SELBUF_H |
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53 | # include "selbuf.h" |
54 | #endif |
55 | |
56 | /*----- Data structures ---------------------------------------------------*/ |
57 | |
58 | /* --- Parsed response from ident server --- */ |
59 | |
60 | typedef struct ident_reply { |
61 | unsigned short sport, dport; /* Source and destination ports */ |
62 | unsigned type; /* Type of reply from server */ |
63 | union { |
64 | struct { |
65 | char *os; /* Operating system name */ |
66 | char *user; /* User name */ |
67 | } userid; |
68 | char *error; /* Error message from server */ |
69 | } u; |
70 | } ident_reply; |
71 | |
72 | /* --- Response type codes --- */ |
73 | |
74 | enum { |
75 | IDENT_USERID, |
76 | IDENT_ERROR, |
77 | IDENT_BAD |
78 | }; |
79 | |
80 | /* --- Request structure --- */ |
81 | |
82 | typedef struct ident_request { |
83 | struct sockaddr_in local, remote; |
84 | unsigned state; |
85 | void (*func)(ident_reply */*i*/, void */*p*/); |
86 | void *p; |
87 | sel_state *s; |
88 | conn c; |
89 | selbuf b; |
90 | } ident_request; |
91 | |
92 | enum { |
93 | IDENT_CONN, |
94 | IDENT_READ, |
95 | IDENT_DONE |
96 | }; |
97 | |
98 | /*----- Functions provided ------------------------------------------------*/ |
99 | |
100 | /* --- @ident_abort@ --- * |
101 | * |
102 | * Arguments: @ident_request *rq@ = pointer to request block |
103 | * |
104 | * Returns: --- |
105 | * |
106 | * Use: Cancels an ident request in progress. |
107 | */ |
108 | |
109 | extern void ident_abort(ident_request */*rq*/); |
110 | |
111 | /* --- @ident@ --- * |
112 | * |
113 | * Arguments: @ident_request *rq@ = pointer to request block |
114 | * @sel_state *s@ = I/O multiplexor |
115 | * @const struct sockaddr_in *local, *remote@ = addresses |
116 | * @void (*func)(ident_reply *i, void *p)@ = handler function |
117 | * @void *p@ = argument for handler |
118 | * |
119 | * Returns: --- |
120 | * |
121 | * Use: Initializes an ident request. |
122 | */ |
123 | |
124 | extern void ident(ident_request */*rq*/, sel_state */*s*/, |
125 | const struct sockaddr_in */*local*/, |
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126 | const struct sockaddr_in */*remote*/, |
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127 | void (*/*func*/)(ident_reply */*i*/, void */*p*/), |
128 | void */*p*/); |
129 | |
130 | /* --- @ident_socket@ --- * |
131 | * |
132 | * Arguments: @ident_request *rq@ = pointer to request block |
133 | * @sel_state *s@ = I/O multiplexor |
134 | * @int sk@ = connected socket file descriptor |
135 | * @void (*func)(ident_reply *i, void *p)@ = handler function |
136 | * @void *p@ = argument for handler |
137 | * |
138 | * Returns: --- |
139 | * |
140 | * Use: An alternative interface to @ident@. Initializes an ident |
141 | * request from a connected socket, rather than from an explicit |
142 | * address. This will call @getsockname@ and @getpeername@ to |
143 | * find out what the socket is actually connected to, which adds |
144 | * convenience but wastes time. |
145 | */ |
146 | |
147 | extern void ident_socket(ident_request */*rq*/, sel_state */*s*/, int /*sk*/, |
148 | void (*/*func*/)(ident_reply */*i*/, void */*p*/), |
149 | void */*p*/); |
150 | |
151 | /*----- That's all, folks -------------------------------------------------*/ |
152 | |
153 | #ifdef __cplusplus |
154 | } |
155 | #endif |
156 | |
157 | #endif |