main.cpp revision 4e248e5a7a542067fd3f0467680eef2f92b1e195 
1/*
2 * Copyright (C) 2008 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#include <stdio.h>
18#include <stdlib.h>
19#include <signal.h>
20#include <errno.h>
21#include <string.h>
22#include <sys/stat.h>
23#include <sys/types.h>
24#include <sys/wait.h>
25
26#include <fcntl.h>
27#include <dirent.h>
28
29#define LOG_TAG "Netd"
30
31#include "cutils/log.h"
32
33#include "CommandListener.h"
34#include "NetlinkManager.h"
35#include "DnsProxyListener.h"
36
37static void coldboot(const char *path);
38static void sigchld_handler(int sig);
39
40int main() {
41
42    CommandListener *cl;
43    NetlinkManager *nm;
44    DnsProxyListener *dpl;
45
46    LOGI("Netd 1.0 starting");
47
48//    signal(SIGCHLD, sigchld_handler);
49
50    if (!(nm = NetlinkManager::Instance())) {
51        LOGE("Unable to create NetlinkManager");
52        exit(1);
53    };
54
55
56    cl = new CommandListener();
57    nm->setBroadcaster((SocketListener *) cl);
58
59    if (nm->start()) {
60        LOGE("Unable to start NetlinkManager (%s)", strerror(errno));
61        exit(1);
62    }
63
64    // Set local DNS mode, to prevent bionic from proxying
65    // back to this service, recursively.
66    setenv("ANDROID_DNS_MODE", "local", 1);
67    dpl = new DnsProxyListener();
68    if (dpl->startListener()) {
69        LOGE("Unable to start DnsProxyListener (%s)", strerror(errno));
70        exit(1);
71    }
72
73    /*
74     * Now that we're up, we can respond to commands
75     */
76    if (cl->startListener()) {
77        LOGE("Unable to start CommandListener (%s)", strerror(errno));
78        exit(1);
79    }
80
81    // Eventually we'll become the monitoring thread
82    while(1) {
83        sleep(1000);
84    }
85
86    LOGI("Netd exiting");
87    exit(0);
88}
89
90static void do_coldboot(DIR *d, int lvl)
91{
92    struct dirent *de;
93    int dfd, fd;
94
95    dfd = dirfd(d);
96
97    fd = openat(dfd, "uevent", O_WRONLY);
98    if(fd >= 0) {
99        write(fd, "add\n", 4);
100        close(fd);
101    }
102
103    while((de = readdir(d))) {
104        DIR *d2;
105
106        if (de->d_name[0] == '.')
107            continue;
108
109        if (de->d_type != DT_DIR && lvl > 0)
110            continue;
111
112        fd = openat(dfd, de->d_name, O_RDONLY | O_DIRECTORY);
113        if(fd < 0)
114            continue;
115
116        d2 = fdopendir(fd);
117        if(d2 == 0)
118            close(fd);
119        else {
120            do_coldboot(d2, lvl + 1);
121            closedir(d2);
122        }
123    }
124}
125
126static void coldboot(const char *path)
127{
128    DIR *d = opendir(path);
129    if(d) {
130        do_coldboot(d, 0);
131        closedir(d);
132    }
133}
134
135static void sigchld_handler(int sig) {
136    pid_t pid = wait(NULL);
137    LOGD("Child process %d exited", pid);
138}
139