blob: 6b54c31b5dff537888e2ba21ecb4a369547cb81d [file] [log] [blame]
/*
* 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.
*/
#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <dirent.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define LOG_TAG "PppController"
#include <cutils/log.h>
#include "PppController.h"
PppController::PppController() {
mTtys = new TtyCollection();
mPid = 0;
}
PppController::~PppController() {
TtyCollection::iterator it;
for (it = mTtys->begin(); it != mTtys->end(); ++it) {
free(*it);
}
mTtys->clear();
}
int PppController::attachPppd(const char *tty, struct in_addr local,
struct in_addr remote, struct in_addr dns1,
struct in_addr dns2) {
pid_t pid;
if (mPid) {
ALOGE("Multiple PPPD instances not currently supported");
errno = EBUSY;
return -1;
}
TtyCollection::iterator it;
for (it = mTtys->begin(); it != mTtys->end(); ++it) {
if (!strcmp(tty, *it)) {
break;
}
}
if (it == mTtys->end()) {
ALOGE("Invalid tty '%s' specified", tty);
errno = -EINVAL;
return -1;
}
if ((pid = fork()) < 0) {
ALOGE("fork failed (%s)", strerror(errno));
return -1;
}
if (!pid) {
char *l = strdup(inet_ntoa(local));
char *r = strdup(inet_ntoa(remote));
char *d1 = strdup(inet_ntoa(dns1));
char *d2 = strdup(inet_ntoa(dns2));
char dev[32];
char *lr;
asprintf(&lr, "%s:%s", l, r);
snprintf(dev, sizeof(dev), "/dev/%s", tty);
// TODO: Deal with pppd bailing out after 99999 seconds of being started
// but not getting a connection
if (execl("/system/bin/pppd", "/system/bin/pppd", "-detach", dev, "115200",
lr, "ms-dns", d1, "ms-dns", d2, "lcp-max-configure", "99999", (char *) NULL)) {
ALOGE("execl failed (%s)", strerror(errno));
}
ALOGE("Should never get here!");
return 0;
} else {
mPid = pid;
}
return 0;
}
int PppController::detachPppd(const char *tty) {
if (mPid == 0) {
ALOGE("PPPD already stopped");
return 0;
}
ALOGD("Stopping PPPD services on port %s", tty);
kill(mPid, SIGTERM);
waitpid(mPid, NULL, 0);
mPid = 0;
ALOGD("PPPD services on port %s stopped", tty);
return 0;
}
TtyCollection *PppController::getTtyList() {
updateTtyList();
return mTtys;
}
int PppController::updateTtyList() {
TtyCollection::iterator it;
for (it = mTtys->begin(); it != mTtys->end(); ++it) {
free(*it);
}
mTtys->clear();
DIR *d = opendir("/sys/class/tty");
if (!d) {
ALOGE("Error opening /sys/class/tty (%s)", strerror(errno));
return -1;
}
struct dirent *de;
while ((de = readdir(d))) {
if (de->d_name[0] == '.')
continue;
if ((!strncmp(de->d_name, "tty", 3)) && (strlen(de->d_name) > 3)) {
mTtys->push_back(strdup(de->d_name));
}
}
closedir(d);
return 0;
}