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
|
/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_INCLUDE_HARDWARE_QEMUD_H
#define ANDROID_INCLUDE_HARDWARE_QEMUD_H
#include <cutils/sockets.h>
#include "qemu_pipe.h"
/* the following is helper code that is used by the QEMU-specific
* hardware HAL modules to communicate with the emulator program
* through the 'qemud' multiplexing daemon, or through the qemud
* pipe.
*
* see the documentation comments for details in
* development/emulator/qemud/qemud.c
*
* all definitions here are built into the HAL module to avoid
* having to write a tiny shared library for this.
*/
/* we expect the D macro to be defined to a function macro
* that sends its formatted string argument(s) to the log.
* If not, ignore the traces.
*/
#ifndef D
# define D(...) ((void)0)
#endif
static __inline__ int
qemud_fd_write(int fd, const void* buff, int len)
{
int len2;
do {
len2 = write(fd, buff, len);
} while (len2 < 0 && errno == EINTR);
return len2;
}
static __inline__ int
qemud_fd_read(int fd, void* buff, int len)
{
int len2;
do {
len2 = read(fd, buff, len);
} while (len2 < 0 && errno == EINTR);
return len2;
}
static __inline__ int
qemud_channel_open(const char* name)
{
int fd;
int namelen = strlen(name);
char answer[2];
char pipe_name[256];
/* First, try to connect to the pipe. */
snprintf(pipe_name, sizeof(pipe_name), "qemud:%s", name);
fd = qemu_pipe_open(pipe_name);
if (fd < 0) {
D("QEMUD pipe is not available for %s: %s", name, strerror(errno));
/* If pipe is not available, connect to qemud control socket */
fd = socket_local_client( "qemud",
ANDROID_SOCKET_NAMESPACE_RESERVED,
SOCK_STREAM );
if (fd < 0) {
D("no qemud control socket: %s", strerror(errno));
return -1;
}
/* send service name to connect */
if (qemud_fd_write(fd, name, namelen) != namelen) {
D("can't send service name to qemud: %s",
strerror(errno));
close(fd);
return -1;
}
/* read answer from daemon */
if (qemud_fd_read(fd, answer, 2) != 2 ||
answer[0] != 'O' || answer[1] != 'K') {
D("cant' connect to %s service through qemud", name);
close(fd);
return -1;
}
}
return fd;
}
static __inline__ int
qemud_channel_send(int fd, const void* msg, int msglen)
{
char header[5];
if (msglen < 0)
msglen = strlen((const char*)msg);
if (msglen == 0)
return 0;
snprintf(header, sizeof header, "%04x", msglen);
if (qemud_fd_write(fd, header, 4) != 4) {
D("can't write qemud frame header: %s", strerror(errno));
return -1;
}
if (qemud_fd_write(fd, msg, msglen) != msglen) {
D("can4t write qemud frame payload: %s", strerror(errno));
return -1;
}
return 0;
}
static __inline__ int
qemud_channel_recv(int fd, void* msg, int msgsize)
{
char header[5];
int size, avail;
if (qemud_fd_read(fd, header, 4) != 4) {
D("can't read qemud frame header: %s", strerror(errno));
return -1;
}
header[4] = 0;
if (sscanf(header, "%04x", &size) != 1) {
D("malformed qemud frame header: '%.*s'", 4, header);
return -1;
}
if (size > msgsize)
return -1;
if (qemud_fd_read(fd, msg, size) != size) {
D("can't read qemud frame payload: %s", strerror(errno));
return -1;
}
return size;
}
#endif /* ANDROID_INCLUDE_HARDWARE_QEMUD_H */
|
