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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_debugger_port = 5858;
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 < 1024 || result > 65535) {
fprintf(stderr, "Debug port must be 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() : debugger_enabled_(false),
#if HAVE_INSPECTOR
inspector_enabled_(false),
#endif // HAVE_INSPECTOR
wait_connect_(false), http_enabled_(false),
host_name_("127.0.0.1"), port_(-1) { }
void DebugOptions::EnableDebugAgent(DebugAgentType tool) {
switch (tool) {
#if HAVE_INSPECTOR
case DebugAgentType::kInspector:
inspector_enabled_ = true;
debugger_enabled_ = true;
break;
#endif // HAVE_INSPECTOR
case DebugAgentType::kDebugger:
debugger_enabled_ = true;
break;
case DebugAgentType::kNone:
break;
}
}
bool DebugOptions::ParseOption(const std::string& option) {
bool enable_inspector = false;
bool has_argument = false;
std::string option_name;
std::string argument;
auto pos = option.find("=");
if (pos == std::string::npos) {
option_name = option;
} else {
has_argument = true;
option_name = option.substr(0, pos);
argument = option.substr(pos + 1);
}
// --debug and --inspect are mutually exclusive
if (option_name == "--debug") {
debugger_enabled_ = true;
} else if (option_name == "--debug-brk") {
debugger_enabled_ = true;
wait_connect_ = true;
} else if (option_name == "--inspect") {
debugger_enabled_ = true;
enable_inspector = true;
} else if (option_name == "--inspect-brk") {
debugger_enabled_ = true;
enable_inspector = true;
wait_connect_ = true;
} else if ((option_name != "--debug-port" &&
option_name != "--inspect-port") ||
!has_argument) {
// only other valid possibility is --debug-port,
// which requires an argument
return false;
}
if (enable_inspector) {
#if HAVE_INSPECTOR
inspector_enabled_ = true;
#else
fprintf(stderr,
"Inspector support is not available with this Node.js build\n");
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) {
#if HAVE_INSPECTOR
port = inspector_enabled_ ? default_inspector_port : default_debugger_port;
#else
port = default_debugger_port;
#endif // HAVE_INSPECTOR
}
return port;
}
} // namespace node
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