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Dan Albertcc731cc2015-02-24 21:26:58 -08001/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
Dan Albert33134262015-03-19 15:21:08 -070017#define TRACE_TAG TRACE_RWX
Dan Albertcc731cc2015-02-24 21:26:58 -080018
Dan Albertcc731cc2015-02-24 21:26:58 -080019#include "adb_io.h"
20
21#include <unistd.h>
22
Elliott Hughesab52c182015-05-01 17:04:38 -070023#include <base/stringprintf.h>
24
Dan Albertcc731cc2015-02-24 21:26:58 -080025#include "adb_trace.h"
Elliott Hughese67f1f82015-04-30 17:32:03 -070026#include "adb_utils.h"
Elliott Hughesab52c182015-05-01 17:04:38 -070027#include "sysdeps.h"
Elliott Hughese67f1f82015-04-30 17:32:03 -070028
29bool SendProtocolString(int fd, const std::string& s) {
30 int length = s.size();
31 if (length > 0xffff) {
32 length = 0xffff;
33 }
34
Elliott Hughesab52c182015-05-01 17:04:38 -070035 return WriteFdFmt(fd, "%04x", length) && WriteFdExactly(fd, s);
Elliott Hughese67f1f82015-04-30 17:32:03 -070036}
37
38bool SendOkay(int fd) {
39 return WriteFdExactly(fd, "OKAY", 4);
40}
41
42bool SendFail(int fd, const std::string& reason) {
43 return WriteFdExactly(fd, "FAIL", 4) && SendProtocolString(fd, reason);
44}
Dan Albertcc731cc2015-02-24 21:26:58 -080045
46bool ReadFdExactly(int fd, void* buf, size_t len) {
47 char* p = reinterpret_cast<char*>(buf);
48
Dan Albertcc731cc2015-02-24 21:26:58 -080049 size_t len0 = len;
Dan Albertcc731cc2015-02-24 21:26:58 -080050
51 D("readx: fd=%d wanted=%zu\n", fd, len);
52 while (len > 0) {
Dan Albertbac34742015-02-25 17:51:28 -080053 int r = adb_read(fd, p, len);
Dan Albertcc731cc2015-02-24 21:26:58 -080054 if (r > 0) {
55 len -= r;
56 p += r;
57 } else if (r == -1) {
58 D("readx: fd=%d error %d: %s\n", fd, errno, strerror(errno));
59 return false;
60 } else {
61 D("readx: fd=%d disconnected\n", fd);
62 errno = 0;
63 return false;
64 }
65 }
66
Dan Albertcc731cc2015-02-24 21:26:58 -080067 D("readx: fd=%d wanted=%zu got=%zu\n", fd, len0, len0 - len);
68 if (ADB_TRACING) {
69 dump_hex(reinterpret_cast<const unsigned char*>(buf), len0);
70 }
Dan Albertcc731cc2015-02-24 21:26:58 -080071
72 return true;
73}
74
75bool WriteFdExactly(int fd, const void* buf, size_t len) {
76 const char* p = reinterpret_cast<const char*>(buf);
77 int r;
78
Dan Albertcc731cc2015-02-24 21:26:58 -080079 D("writex: fd=%d len=%d: ", fd, (int)len);
80 if (ADB_TRACING) {
81 dump_hex(reinterpret_cast<const unsigned char*>(buf), len);
82 }
Dan Albertcc731cc2015-02-24 21:26:58 -080083
84 while (len > 0) {
Dan Albertbac34742015-02-25 17:51:28 -080085 r = adb_write(fd, p, len);
Dan Albertcc731cc2015-02-24 21:26:58 -080086 if (r == -1) {
87 D("writex: fd=%d error %d: %s\n", fd, errno, strerror(errno));
88 if (errno == EAGAIN) {
89 adb_sleep_ms(1); // just yield some cpu time
90 continue;
91 } else if (errno == EPIPE) {
92 D("writex: fd=%d disconnected\n", fd);
93 errno = 0;
94 return false;
Dan Albert08f66bc2015-03-19 18:09:59 -070095 } else {
96 return false;
Dan Albertcc731cc2015-02-24 21:26:58 -080097 }
98 } else {
99 len -= r;
100 p += r;
101 }
102 }
103 return true;
104}
105
Elliott Hughese67f1f82015-04-30 17:32:03 -0700106bool WriteFdExactly(int fd, const char* str) {
107 return WriteFdExactly(fd, str, strlen(str));
108}
109
110bool WriteFdExactly(int fd, const std::string& str) {
111 return WriteFdExactly(fd, str.c_str(), str.size());
112}
113
Elliott Hughesab52c182015-05-01 17:04:38 -0700114bool WriteFdFmt(int fd, const char* fmt, ...) {
115 std::string str;
116
117 va_list ap;
118 va_start(ap, fmt);
119 android::base::StringAppendV(&str, fmt, ap);
120 va_end(ap);
121
122 return WriteFdExactly(fd, str);
Dan Albertcc731cc2015-02-24 21:26:58 -0800123}