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#include "node_debug_options.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "util.h"
namespace node {
namespace {
const int default_inspector_port = 9229;
inline std::string remove_brackets(const std::string& host) {
if (!host.empty() && host.front() == '[' && host.back() == ']')
return host.substr(1, host.size() - 2);
else
return host;
}
int parse_and_validate_port(const std::string& port) {
char* endptr;
errno = 0;
const long result = strtol(port.c_str(), &endptr, 10); // NOLINT(runtime/int)
if (errno != 0 || *endptr != '\0'||
(result != 0 && result < 1024) || result > 65535) {
fprintf(stderr, "Debug port must be 0 or in range 1024 to 65535.\n");
exit(12);
}
return static_cast<int>(result);
}
std::pair<std::string, int> split_host_port(const std::string& arg) {
// remove_brackets only works if no port is specified
// so if it has an effect only an IPv6 address was specified
std::string host = remove_brackets(arg);
if (host.length() < arg.length())
return {host, -1};
size_t colon = arg.rfind(':');
if (colon == std::string::npos) {
// Either a port number or a host name. Assume that
// if it's not all decimal digits, it's a host name.
for (char c : arg) {
if (c < '0' || c > '9') {
return {arg, -1};
}
}
return {"", parse_and_validate_port(arg)};
}
// host and port found
return std::make_pair(remove_brackets(arg.substr(0, colon)),
parse_and_validate_port(arg.substr(colon + 1)));
}
} // namespace
DebugOptions::DebugOptions() :
inspector_enabled_(false),
deprecated_debug_(false),
break_first_line_(false),
host_name_("127.0.0.1"), port_(-1) { }
bool DebugOptions::ParseOption(const char* argv0, const std::string& option) {
bool has_argument = false;
std::string option_name;
std::string argument;
auto pos = option.find("=");
if (pos == std::string::npos) {
option_name = option;
} else {
option_name = option.substr(0, pos);
argument = option.substr(pos + 1);
if (argument.length() > 0)
has_argument = true;
else
argument.clear();
}
// Note that --debug-port and --debug-brk in conjunction with --inspect
// work but are undocumented.
// --debug is no longer valid.
// Ref: https://github.com/nodejs/node/issues/12630
// Ref: https://github.com/nodejs/node/pull/12949
if (option_name == "--inspect") {
inspector_enabled_ = true;
} else if (option_name == "--debug") {
deprecated_debug_ = true;
} else if (option_name == "--inspect-brk") {
inspector_enabled_ = true;
break_first_line_ = true;
} else if (option_name == "--debug-brk") {
break_first_line_ = true;
deprecated_debug_ = true;
} else if (option_name == "--debug-port" ||
option_name == "--inspect-port") {
if (!has_argument) {
fprintf(stderr, "%s: %s requires an argument\n",
argv0, option.c_str());
exit(9);
}
} else {
return false;
}
#if !HAVE_INSPECTOR
if (inspector_enabled_) {
fprintf(stderr,
"Inspector support is not available with this Node.js build\n");
}
inspector_enabled_ = false;
return false;
#endif
// argument can be specified for *any* option to specify host:port
if (has_argument) {
std::pair<std::string, int> host_port = split_host_port(argument);
if (!host_port.first.empty()) {
host_name_ = host_port.first;
}
if (host_port.second >= 0) {
port_ = host_port.second;
}
}
return true;
}
int DebugOptions::port() const {
int port = port_;
if (port < 0) {
port = default_inspector_port;
}
return port;
}
} // namespace node
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