adb_utils.cpp revision 47d67c96ec991ef1690b4c07188335cbc4bfa2aa 
1/*
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
17#define TRACE_TAG TRACE_ADB
18
19#include "adb_utils.h"
20
21#include <stdlib.h>
22#include <sys/stat.h>
23#include <sys/types.h>
24#include <unistd.h>
25
26#include <algorithm>
27
28#include <base/logging.h>
29#include <base/stringprintf.h>
30#include <base/strings.h>
31#include <cutils/sockets.h>
32
33#include "adb_trace.h"
34#include "sysdeps.h"
35
36#if defined(_WIN32)
37#include <ws2tcpip.h>
38#else
39#include <netdb.h>
40#endif
41
42bool getcwd(std::string* s) {
43  char* cwd = getcwd(nullptr, 0);
44  if (cwd != nullptr) *s = cwd;
45  free(cwd);
46  return (cwd != nullptr);
47}
48
49bool directory_exists(const std::string& path) {
50  struct stat sb;
51  return lstat(path.c_str(), &sb) != -1 && S_ISDIR(sb.st_mode);
52}
53
54std::string escape_arg(const std::string& s) {
55  std::string result = s;
56
57  // Escape any ' in the string (before we single-quote the whole thing).
58  // The correct way to do this for the shell is to replace ' with '\'' --- that is,
59  // close the existing single-quoted string, escape a single single-quote, and start
60  // a new single-quoted string. Like the C preprocessor, the shell will concatenate
61  // these pieces into one string.
62  for (size_t i = 0; i < s.size(); ++i) {
63    if (s[i] == '\'') {
64      result.insert(i, "'\\'");
65      i += 2;
66    }
67  }
68
69  // Prefix and suffix the whole string with '.
70  result.insert(result.begin(), '\'');
71  result.push_back('\'');
72  return result;
73}
74
75bool mkdirs(const std::string& path) {
76    for (size_t i = adb_dirstart(path, 1); i != std::string::npos; i = adb_dirstart(path, i + 1)) {
77        if (adb_mkdir(path.substr(0, i), 0775) == -1 && errno != EEXIST) {
78            return false;
79        }
80    }
81    return true;
82}
83
84void dump_hex(const void* data, size_t byte_count) {
85    byte_count = std::min(byte_count, size_t(16));
86
87    const uint8_t* p = reinterpret_cast<const uint8_t*>(data);
88
89    std::string line;
90    for (size_t i = 0; i < byte_count; ++i) {
91        android::base::StringAppendF(&line, "%02x", p[i]);
92    }
93    line.push_back(' ');
94
95    for (size_t i = 0; i < byte_count; ++i) {
96        int c = p[i];
97        if (c < 32 || c > 127) {
98            c = '.';
99        }
100        line.push_back(c);
101    }
102
103    DR("%s\n", line.c_str());
104}
105
106bool parse_host_and_port(const std::string& address,
107                         std::string* canonical_address,
108                         std::string* host, int* port,
109                         std::string* error) {
110    host->clear();
111
112    bool ipv6 = true;
113    bool saw_port = false;
114    size_t colons = std::count(address.begin(), address.end(), ':');
115    size_t dots = std::count(address.begin(), address.end(), '.');
116    std::string port_str;
117    if (address[0] == '[') {
118      // [::1]:123
119      if (address.rfind("]:") == std::string::npos) {
120        *error = android::base::StringPrintf("bad IPv6 address '%s'", address.c_str());
121        return false;
122      }
123      *host = address.substr(1, (address.find("]:") - 1));
124      port_str = address.substr(address.rfind("]:") + 2);
125      saw_port = true;
126    } else if (dots == 0 && colons >= 2 && colons <= 7) {
127      // ::1
128      *host = address;
129    } else if (colons <= 1) {
130      // 1.2.3.4 or some.accidental.domain.com
131      ipv6 = false;
132      std::vector<std::string> pieces = android::base::Split(address, ":");
133      *host = pieces[0];
134      if (pieces.size() > 1) {
135        port_str = pieces[1];
136        saw_port = true;
137      }
138    }
139
140    if (host->empty()) {
141      *error = android::base::StringPrintf("no host in '%s'", address.c_str());
142      return false;
143    }
144
145    if (saw_port) {
146      if (sscanf(port_str.c_str(), "%d", port) != 1 || *port <= 0 || *port > 65535) {
147        *error = android::base::StringPrintf("bad port number '%s' in '%s'",
148                                             port_str.c_str(), address.c_str());
149        return false;
150      }
151    }
152
153    *canonical_address = android::base::StringPrintf(ipv6 ? "[%s]:%d" : "%s:%d", host->c_str(), *port);
154    LOG(DEBUG) << "parsed " << address << " as " << *host << " and " << *port
155               << " (" << *canonical_address << ")";
156    return true;
157}
158
159int network_connect(const std::string& host, int port, int type, int timeout, std::string* error) {
160    int getaddrinfo_error = 0;
161    int fd = socket_network_client_timeout(host.c_str(), port, type, timeout, &getaddrinfo_error);
162    if (fd != -1) {
163        return fd;
164    }
165    if (getaddrinfo_error != 0) {
166        // TODO: gai_strerror is not thread safe on Win32.
167        *error = gai_strerror(getaddrinfo_error);
168    } else {
169        *error = strerror(errno);
170    }
171    return -1;
172}
173