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