int BandwidthController::runIptablesCmd(const char *cmd, IptRejectOp rejectHandling,
IptIpVer iptVer, IptFailureLog failureHandling) {
char buffer[MAX_CMD_LEN];
const char *argv[MAX_CMD_ARGS];
int argc = 0;
char *next = buffer;
char *tmp;
int res;
std::string fullCmd = cmd;
if (rejectHandling == IptRejectAdd) {
fullCmd += " --jump REJECT --reject-with";
switch (iptVer) {
case IptIpV4:
fullCmd += " icmp-net-prohibited";
break;
case IptIpV6:
fullCmd += " icmp6-adm-prohibited";
break;
}
}
fullCmd.insert(0, " ");
fullCmd.insert(0, iptVer == IptIpV4 ? IPTABLES_PATH : IP6TABLES_PATH);
if (!useLogwrapCall) {
res = system_nosh(fullCmd.c_str());
} else {
if (StrncpyAndCheck(buffer, fullCmd.c_str(), sizeof(buffer))) {
ALOGE("iptables command too long");
return -1;
}
argc = 0;
while ((tmp = strsep(&next, " "))) {
argv[argc++] = tmp;
if (argc >= MAX_CMD_ARGS) {
ALOGE("iptables argument overflow");
return -1;
}
}
argv[argc] = NULL;
res = logwrap(argc, argv);
}
if (res && failureHandling == IptFailShow) {
ALOGE("runIptablesCmd(): failed %s res=%d", fullCmd.c_str(), res);
}
return res;
}
int SecondaryTableController::runAndFree(SocketClient *cli, char *cmd) {
int ret = 0;
if (strlen(cmd) >= 255) {
if (cli != NULL) {
ALOGE("ip command (%s) too long", cmd);
errno = E2BIG;
cli->sendMsg(ResponseCode::CommandSyntaxError, "Too long", true);
}
free(cmd);
return -1;
}
ret = system_nosh(cmd);
free(cmd);
return ret;
}
int ThrottleController::runTcCmd(const char *cmd) {
char *buffer;
size_t len = strnlen(cmd, 255);
int res;
if (len == 255) {
ALOGE("tc command too long");
errno = E2BIG;
return -1;
}
asprintf(&buffer, "%s %s", TC_PATH, cmd);
res = system_nosh(buffer);
free(buffer);
return res;
}
int NatController::runCmd(const char *path, const char *cmd) {
char *buffer;
size_t len = strnlen(cmd, 255);
int res;
if (len == 255) {
LOGE("command too long");
errno = E2BIG;
return -1;
}
asprintf(&buffer, "%s %s", path, cmd);
res = system_nosh(buffer);
free(buffer);
return res;
}
int SecondaryTableController::addRoute(SocketClient *cli, char *iface, char *dest, int prefix,
char *gateway) {
char *cmd;
int tableIndex = findTableNumber(iface);
int fd;
struct ifreq ifreqs[20];
struct ifconf ic;
unsigned int i;
if (tableIndex == -1) {
tableIndex = findTableNumber(""); // look for an empty slot
if (tableIndex == -1) {
ALOGE("Max number of NATed interfaces reached");
errno = ENODEV;
cli->sendMsg(ResponseCode::OperationFailed, "Max number NATed", true);
return -1;
}
strncpy(mInterfaceTable[tableIndex], iface, IFNAMSIZ);
// Ensure null termination even if truncation happened
mInterfaceTable[tableIndex][IFNAMSIZ] = 0;
}
if ((fd = open("/proc/net/mptcp", O_RDONLY)) != -1) {
close(fd);
fd = socket(AF_INET, SOCK_DGRAM, 0);
if (fd < 0) {
ALOGE("socket error");
return -1;
}
ic.ifc_len = sizeof(ifreqs);
ic.ifc_buf = (char *) ifreqs;
if (ioctl(fd, SIOCGIFCONF, &ic) < 0) {
ALOGE("ioctl error");
return -1;
}
for (i = 0; i < ic.ifc_len / sizeof(struct ifreq); i++) {
if (!strcmp(ifreqs[i].ifr_name, iface)) {
asprintf(&cmd, "%s rule add from %s table %d", IP_PATH,
inet_ntoa(((struct sockaddr_in *)&ifreqs[i].ifr_addr)->sin_addr),
tableIndex+BASE_TABLE_NUMBER);
system_nosh(cmd);
}
}
}
return modifyRoute(cli, ADD, iface, dest, prefix, gateway, tableIndex);
}
int SecondaryTableController::removeRoute(SocketClient *cli, char *iface, char *dest, int prefix,
char *gateway) {
char *cmd;
int tableIndex = findTableNumber(iface);
int fd;
struct ifreq ifreqs[20];
struct ifconf ic;
unsigned int i;
if (tableIndex == -1) {
ALOGE("Interface not found");
errno = ENODEV;
cli->sendMsg(ResponseCode::OperationFailed, "Interface not found", true);
return -1;
}
if ((fd = open("/proc/net/mptcp", O_RDONLY)) != -1) {
close(fd);
fd = socket(AF_INET, SOCK_DGRAM, 0);
if (fd < 0) {
ALOGE("socket error");
return -1;
}
ic.ifc_len = sizeof(ifreqs);
ic.ifc_buf = (char *) ifreqs;
if (ioctl(fd, SIOCGIFCONF, &ic) < 0) {
ALOGE("ioctl error");
return -1;
}
for (i = 0; i < ic.ifc_len / sizeof(struct ifreq); i++) {
if (!strcmp(ifreqs[i].ifr_name, iface)) {
asprintf(&cmd, "%s rule del from %s table %d", IP_PATH,
inet_ntoa(((struct sockaddr_in *)&ifreqs[i].ifr_addr)->sin_addr),
tableIndex+BASE_TABLE_NUMBER);
system_nosh(cmd);
}
}
}
return modifyRoute(cli, DEL, iface, dest, prefix, gateway, tableIndex);
}