adb_utils.cpp revision 381cfa9a8bc262dcd823a8bb6adc189595a2fe7d 
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 <netdb.h>
22#include <stdlib.h>
23#include <sys/stat.h>
24#include <sys/types.h>
25#include <unistd.h>
26
27#include <algorithm>
28
29#include <base/logging.h>
30#include <base/stringprintf.h>
31#include <base/strings.h>
32#include <cutils/sockets.h>
33
34#include "adb_trace.h"
35#include "sysdeps.h"
36
37bool getcwd(std::string* s) {
38  char* cwd = getcwd(nullptr, 0);
39  if (cwd != nullptr) *s = cwd;
40  free(cwd);
41  return (cwd != nullptr);
42}
43
44bool directory_exists(const std::string& path) {
45  struct stat sb;
46  return lstat(path.c_str(), &sb) != -1 && S_ISDIR(sb.st_mode);
47}
48
49std::string escape_arg(const std::string& s) {
50  std::string result = s;
51
52  // Escape any ' in the string (before we single-quote the whole thing).
53  // The correct way to do this for the shell is to replace ' with '\'' --- that is,
54  // close the existing single-quoted string, escape a single single-quote, and start
55  // a new single-quoted string. Like the C preprocessor, the shell will concatenate
56  // these pieces into one string.
57  for (size_t i = 0; i < s.size(); ++i) {
58    if (s[i] == '\'') {
59      result.insert(i, "'\\'");
60      i += 2;
61    }
62  }
63
64  // Prefix and suffix the whole string with '.
65  result.insert(result.begin(), '\'');
66  result.push_back('\'');
67  return result;
68}
69
70int mkdirs(const char *path)
71{
72    int ret;
73    char *x = (char *)path + 1;
74
75    for(;;) {
76        x = adb_dirstart(x);
77        if(x == 0) return 0;
78        *x = 0;
79        ret = adb_mkdir(path, 0775);
80        *x = OS_PATH_SEPARATOR;
81        if((ret < 0) && (errno != EEXIST)) {
82            return ret;
83        }
84        x++;
85    }
86    return 0;
87}
88
89void dump_hex(const void* data, size_t byte_count) {
90    byte_count = std::min(byte_count, size_t(16));
91
92    const uint8_t* p = reinterpret_cast<const uint8_t*>(data);
93
94    std::string line;
95    for (size_t i = 0; i < byte_count; ++i) {
96        android::base::StringAppendF(&line, "%02x", p[i]);
97    }
98    line.push_back(' ');
99
100    for (size_t i = 0; i < byte_count; ++i) {
101        int c = p[i];
102        if (c < 32 || c > 127) {
103            c = '.';
104        }
105        line.push_back(c);
106    }
107
108    DR("%s\n", line.c_str());
109}
110
111bool parse_host_and_port(const std::string& address,
112                         std::string* canonical_address,
113                         std::string* host, int* port,
114                         std::string* error) {
115    host->clear();
116
117    bool ipv6 = true;
118    bool saw_port = false;
119    size_t colons = std::count(address.begin(), address.end(), ':');
120    size_t dots = std::count(address.begin(), address.end(), '.');
121    std::string port_str;
122    if (address[0] == '[') {
123      // [::1]:123
124      if (address.rfind("]:") == std::string::npos) {
125        *error = android::base::StringPrintf("bad IPv6 address '%s'", address.c_str());
126        return false;
127      }
128      *host = address.substr(1, (address.find("]:") - 1));
129      port_str = address.substr(address.rfind("]:") + 2);
130      saw_port = true;
131    } else if (dots == 0 && colons >= 2 && colons <= 7) {
132      // ::1
133      *host = address;
134    } else if (colons <= 1) {
135      // 1.2.3.4 or some.accidental.domain.com
136      ipv6 = false;
137      std::vector<std::string> pieces = android::base::Split(address, ":");
138      *host = pieces[0];
139      if (pieces.size() > 1) {
140        port_str = pieces[1];
141        saw_port = true;
142      }
143    }
144
145    if (host->empty()) {
146      *error = android::base::StringPrintf("no host in '%s'", address.c_str());
147      return false;
148    }
149
150    if (saw_port) {
151      if (sscanf(port_str.c_str(), "%d", port) != 1 || *port <= 0 || *port > 65535) {
152        *error = android::base::StringPrintf("bad port number '%s' in '%s'",
153                                             port_str.c_str(), address.c_str());
154        return false;
155      }
156    }
157
158    *canonical_address = android::base::StringPrintf(ipv6 ? "[%s]:%d" : "%s:%d", host->c_str(), *port);
159    LOG(DEBUG) << "parsed " << address << " as " << *host << " and " << *port
160               << " (" << *canonical_address << ")";
161    return true;
162}
163
164int network_connect(const std::string& host, int port, int type, int timeout, std::string* error) {
165    int getaddrinfo_error = 0;
166    int fd = socket_network_client_timeout(host.c_str(), port, type, timeout, &getaddrinfo_error);
167    if (fd != -1) {
168        return fd;
169    }
170    if (getaddrinfo_error != 0) {
171        // TODO: not thread safe on Win32.
172        *error = gai_strerror(getaddrinfo_error);
173    } else {
174        *error = strerror(errno);
175    }
176    return -1;
177}
178