1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
/*
* $Header$
*
* Copyright 2006 Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*/
#include "k5_mig_server.h"
#include <syslog.h>
#include <Kerberos/kipc_server.h>
#include "k5_mig_requestServer.h"
#include "k5_mig_reply.h"
/* ------------------------------------------------------------------------ */
static boolean_t k5_ipc_request_demux (mach_msg_header_t *request,
mach_msg_header_t *reply)
{
boolean_t handled = false;
if (!handled) {
handled = k5_ipc_request_server (request, reply);
}
if (!handled && request->msgh_id == MACH_NOTIFY_NO_SENDERS) {
kern_return_t err = KERN_SUCCESS;
err = k5_ipc_server_remove_client (request->msgh_local_port);
if (!err) {
/* Check here for a client in our table and free rights associated with it */
err = mach_port_mod_refs (mach_task_self (), request->msgh_local_port,
MACH_PORT_RIGHT_RECEIVE, -1);
}
if (!err) {
handled = 1; /* was a port we are tracking */
}
}
return handled;
}
/* ------------------------------------------------------------------------ */
kern_return_t k5_ipc_server_create_client_connection (mach_port_t in_server_port,
mach_port_t *out_connection_port)
{
kern_return_t err = KERN_SUCCESS;
mach_port_t connection_port = MACH_PORT_NULL;
mach_port_t old_notification_target = MACH_PORT_NULL;
if (!err) {
err = mach_port_allocate (mach_task_self (), MACH_PORT_RIGHT_RECEIVE, &connection_port);
}
if (!err) {
err = mach_port_move_member (mach_task_self (), connection_port, kipc_server_get_listen_portset ());
}
if (!err) {
/* request no-senders notification so we can tell when client quits/crashes */
err = mach_port_request_notification (mach_task_self (), connection_port,
MACH_NOTIFY_NO_SENDERS, 1, connection_port,
MACH_MSG_TYPE_MAKE_SEND_ONCE, &old_notification_target );
}
if (!err) {
err = k5_ipc_server_add_client (connection_port);
}
if (!err) {
*out_connection_port = connection_port;
connection_port = MACH_PORT_NULL;
}
if (MACH_PORT_VALID (connection_port)) { mach_port_deallocate (mach_task_self (), connection_port); }
return err;
}
/* ------------------------------------------------------------------------ */
kern_return_t k5_ipc_server_request (mach_port_t in_connection_port,
mach_port_t in_reply_port,
k5_ipc_inl_request_t in_inl_request,
mach_msg_type_number_t in_inl_requestCnt,
k5_ipc_ool_request_t in_ool_request,
mach_msg_type_number_t in_ool_requestCnt)
{
kern_return_t err = KERN_SUCCESS;
k5_ipc_stream request_stream = NULL;
if (!err) {
err = k5_ipc_stream_new (&request_stream);
}
if (!err) {
if (in_inl_requestCnt) {
err = k5_ipc_stream_write (request_stream, in_inl_request, in_inl_requestCnt);
} else if (in_ool_requestCnt) {
err = k5_ipc_stream_write (request_stream, in_ool_request, in_ool_requestCnt);
} else {
err = EINVAL;
}
}
if (!err) {
err = k5_ipc_server_handle_request (in_connection_port, in_reply_port, request_stream);
}
k5_ipc_stream_release (request_stream);
if (in_ool_requestCnt) { vm_deallocate (mach_task_self (), (vm_address_t) in_ool_request, in_ool_requestCnt); }
return err;
}
#pragma mark -
/* ------------------------------------------------------------------------ */
int32_t k5_ipc_server_listen_loop (void)
{
/* Run the Mach IPC listen loop.
* This will call k5_ipc_server_create_client_connection for new clients
* and k5_ipc_server_request for existing clients */
return kipc_server_run_server (k5_ipc_request_demux);
}
/* ------------------------------------------------------------------------ */
int32_t k5_ipc_server_send_reply (mach_port_t in_reply_port,
k5_ipc_stream in_reply_stream)
{
kern_return_t err = KERN_SUCCESS;
k5_ipc_inl_reply_t inl_reply;
mach_msg_type_number_t inl_reply_length = 0;
k5_ipc_ool_reply_t ool_reply = NULL;
mach_msg_type_number_t ool_reply_length = 0;
if (!MACH_PORT_VALID (in_reply_port)) { err = EINVAL; }
if (!in_reply_stream ) { err = EINVAL; }
if (!err) {
/* depending on how big the message is, use the fast inline buffer or
* the slow dynamically allocated buffer */
mach_msg_type_number_t reply_length = k5_ipc_stream_size (in_reply_stream);
if (reply_length > K5_IPC_MAX_MSG_SIZE) {
//dprintf ("%s choosing out of line buffer (size is %d)",
// __FUNCTION__, reply_length);
err = vm_read (mach_task_self (),
(vm_address_t) k5_ipc_stream_data (in_reply_stream), reply_length,
(vm_address_t *) &ool_reply, &ool_reply_length);
} else {
//cci_debug_printf ("%s choosing in line buffer (size is %d)",
// __FUNCTION__, reply_length);
inl_reply_length = reply_length;
memcpy (inl_reply, k5_ipc_stream_data (in_reply_stream), reply_length);
}
}
if (!err) {
err = k5_ipc_server_reply (in_reply_port,
inl_reply, inl_reply_length,
ool_reply, ool_reply_length);
}
if (!err) {
/* Because we use ",dealloc" ool_reply will be freed by mach. Don't double free it. */
ool_reply = NULL;
ool_reply_length = 0;
}
if (ool_reply_length) { vm_deallocate (mach_task_self (), (vm_address_t) ool_reply, ool_reply_length); }
return err;
}
|
