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tunsafe-clang15/ts.cpp
Ludvig Strigeus b975eb30e1 ts.exe is named TunSafe.com
2018-10-21 23:56:29 +02:00

875 lines
26 KiB
C++
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#include "stdafx.h"
#include "tunsafe_types.h"
#include "netapi.h"
#include "crypto/curve25519/curve25519-donna.h"
#include "util.h"
#include "wireguard_proto.h"
#include <string.h>
#include <algorithm>
#if defined(OS_WIN)
#include "util_win32.h"
#include "service_pipe_win32.h"
#include "service_win32_constants.h"
#endif // defined(OS_WIN)
#if defined(OS_POSIX)
#include <sys/stat.h>
#include <sys/un.h>
#include <unistd.h>
#include <dirent.h>
#include <errno.h>
#endif // defined(OS_WIN)
#pragma comment(lib, "ws2_32.lib")
#define ANSI_RESET "\x1b[0m"
#define ANSI_BOLD "\x1b[1m"
#define ANSI_FG_BLACK "\x1b[30m"
#define ANSI_FG_RED "\x1b[31m"
#define ANSI_FG_GREEN "\x1b[32m"
#define ANSI_FG_YELLOW "\x1b[33m"
#define ANSI_FG_BLUE "\x1b[34m"
#define ANSI_FG_MAGENTA "\x1b[35m"
#define ANSI_FG_CYAN "\x1b[36m"
#define ANSI_FG_WHITE "\x1b[37m"
#if defined(OS_WIN)
#define EXENAME "tunsafe"
static bool SendMessageToService(HANDLE pipe, int message, const void *data, size_t data_size) {
uint8 *temp = new uint8[data_size + 5];
*(uint32*)temp = (uint32)(data_size + 1);
temp[4] = (uint8)message;
memcpy(temp + 5, data, data_size);
// Write the whole thing
DWORD pos = 0, bytes_to_write = (DWORD)(data_size + 5), bytes_written;
do {
if (!WriteFile(pipe, temp + pos, bytes_to_write, &bytes_written, NULL)) {
fprintf(stderr, "Error writing to service pipe, error = %d\n", GetLastError());
break;
}
pos += bytes_written;
bytes_to_write -= bytes_written;
} while (bytes_to_write != 0);
delete[] temp;
return (bytes_to_write == 0);
}
static bool ReadExactBytesFromPipe(HANDLE pipe, const void *data, DWORD bytes_to_read) {
DWORD pos = 0, n;
do {
if (!ReadFile(pipe, (uint8*)data + pos, bytes_to_read, &n, NULL))
return false;
if (n == 0)
return false; // premature eof..
pos += n;
bytes_to_read -= n;
} while (bytes_to_read != 0);
return true;
}
static bool ReadMessageFromService(HANDLE pipe, int *message, std::string *data) {
uint8 header[5];
uint32 message_size;
if (!ReadExactBytesFromPipe(pipe, header, 5) || (message_size = *(uint32*)header) == 0) {
fprintf(stderr, "Error reading from service pipe, error = %d\n", GetLastError());
return false;
}
*message = header[4];
data->resize(message_size - 1);
if (message_size - 1 != 0 && !ReadExactBytesFromPipe(pipe, data->data(), message_size - 1)) {
fprintf(stderr, "Error reading from service pipe, error = %d\n", GetLastError());
return false;
}
return true;
}
struct ServiceLoginMessage {
uint64 version;
char interfac[kTsMaxDevnameSize];
bool want_state_updates;
bool want_create_interface;
};
static std::vector<GuidAndDevName> g_tap_adapters;
static bool g_did_get_adapters;
static const std::vector<GuidAndDevName> &GetTapAdapterInfo() {
if (!g_did_get_adapters) {
g_did_get_adapters = true;
GetTapAdapterInfo(&g_tap_adapters);
}
return g_tap_adapters;
}
static const char *GetGuidFromInterfaceName(const char *name) {
for (const GuidAndDevName &e : GetTapAdapterInfo())
if (strcmp(e.name, name) == 0)
return e.guid;
return NULL;
}
static const char *GetInterfaceNameFromGuid(const char *guid) {
for (const GuidAndDevName &e : GetTapAdapterInfo())
if (strcmp(e.guid, guid) == 0)
return e.name;
return NULL;
}
static HANDLE ConnectToService(const char *devname, bool want_updates, bool want_create = false) {
ServiceLoginMessage msg = {0};
msg.version = TUNSAFE_SERVICE_PROTOCOL_VERSION;
msg.want_state_updates = want_updates;
msg.want_create_interface = want_create;
// Rename devname to a guid
if (devname) {
const char *guid = (devname[0] == '{' || devname[0] == 0) ? devname : GetGuidFromInterfaceName(devname);
if (!guid) {
fprintf(stderr, "Interface '%s' not found\n", devname);
return NULL;
}
my_strlcpy(msg.interfac, sizeof(msg.interfac), guid);
}
for (;;) {
HANDLE pipe = CreateFile(TUNSAFE_PIPE_NAME, GENERIC_READ | GENERIC_WRITE, 0, NULL,
OPEN_EXISTING, 0, NULL);
if (pipe != INVALID_HANDLE_VALUE) {
if (!SendMessageToService(pipe, TS_SERVICE_REQ_LOGIN, &msg, sizeof(msg))) {
CloseHandle(pipe);
pipe = NULL;
}
return pipe;
}
DWORD error = GetLastError();
if (error != ERROR_PIPE_BUSY) {
fprintf(stderr, "Error connecting to TunSafe service, error = %d\n", error);
if (error == ERROR_FILE_NOT_FOUND)
fprintf(stderr, "Please check that the TunSafe service is started\n");
return NULL;
}
if (!WaitNamedPipe(TUNSAFE_PIPE_NAME, 10000)) {
fprintf(stderr, "Error connecting to TunSafe service, timed out.\n");
return NULL;
}
}
}
static bool CommunicateWithService(const char *devname, const std::string &query, std::string *reply) {
HANDLE pipe = ConnectToService(devname, false);
int message_code;
bool rv = false;
if (pipe != NULL &&
SendMessageToService(pipe, TS_SERVICE_REQ_TEXT_PROTOCOL, query.data(), query.size()) &&
ReadMessageFromService(pipe, &message_code, reply)) {
if (message_code == TS_SERVICE_REQ_TEXT_PROTOCOL_REPLY) {
rv = true;
} else {
if (message_code == TS_SERVICE_MSG_ERROR_REPLY) {
fprintf(stderr, "Error: %s\n", reply->c_str());
} else {
fprintf(stderr, "Unknown reply (%d) from TunSafe service.\n", message_code);
}
}
}
CloseHandle(pipe);
return rv;
}
static bool GetInterfaceList(std::string *result) {
HANDLE pipe = ConnectToService(NULL, false);
int message_code;
bool rv = false;
if (pipe != NULL &&
SendMessageToService(pipe, TS_SERVICE_REQ_GETINTERFACES, NULL, 0) &&
ReadMessageFromService(pipe, &message_code, result)) {
if (message_code == TS_SERVICE_REQ_GETINTERFACES_REPLY) {
rv = true;
} else {
fprintf(stderr, "GetInterfaceList: bad reply\n");
}
}
CloseHandle(pipe);
return rv;
}
#endif // defined(OS_WIN)
#if defined(OS_POSIX)
#define EXENAME "tunsafe"
static const char *GetGuidFromInterfaceName(const char *name) {
return name;
}
static const char *GetInterfaceNameFromGuid(const char *guid) {
return guid;
}
static int OpenUserspaceInterface(const char *iface) {
struct stat st;
struct sockaddr_un un = { 0 };
int fd = -1, rv;
if (strchr(iface, '/') != NULL) {
fprintf(stderr, "Unable to open usermode socket: No such device\n");
goto getout;
}
snprintf(un.sun_path, sizeof(un.sun_path), "/var/run/wireguard/%s.sock", iface);
if (stat(un.sun_path, &st) < 0) {
perror("Unable to open usermode socket");
goto getout;
}
if (!S_ISSOCK(st.st_mode)) {
fprintf(stderr, "Unable to open usermode socket: No such device\n");
goto getout;
}
fd = socket(AF_UNIX, SOCK_STREAM, 0);
if (fd < 0)
goto getout;
un.sun_family = AF_UNIX;
if (connect(fd, (struct sockaddr *)&un, sizeof(un)) < 0) {
if (errno == ECONNREFUSED)
unlink(un.sun_path);
else
perror("Error opening wireguard usermode interface socket");
goto getout;
}
return fd;
getout:
if (fd >= 0)
close(fd);
return -1;
}
static bool GetInterfaceList(std::string *result) {
struct dirent *dent;
DIR *dir = opendir("/var/run/wireguard/");
if (!dir)
return errno == ENOENT;
while ((dent = readdir(dir)) != NULL) {
size_t len = strlen(dent->d_name);
static const char kSuffix[6] = ".sock";
if (len >= sizeof(kSuffix) - 1 &&
memcmp(&dent->d_name[len - (sizeof(kSuffix) - 1)], kSuffix, sizeof(kSuffix) - 1) == 0) {
dent->d_name[len - (sizeof(kSuffix) - 1)] = '\n';
result->append(dent->d_name, len - (sizeof(kSuffix) - 1) + 1);
}
}
closedir(dir);
return true;
}
static bool CommunicateWithService(const char *devname, const std::string &query, std::string *reply) {
ssize_t n;
char buf[4096];
bool rv = false;
reply->clear();
int fd = OpenUserspaceInterface(devname);
if (fd == -1)
return false;
for(size_t pos = 0; query.size() - pos; pos += n) {
n = write(fd, query.data() + pos, query.size() - pos);
if (n <= 0) {
perror("Error writing to service pipe");
goto getout;
}
}
for(;;) {
n = read(fd, buf, sizeof(buf));
if (n <= 0) {
if (n == 0) {
// ensure that it ends with \n\n
if (reply->size() >= 2 && (*reply)[reply->size() - 1] == '\n' && (*reply)[reply->size() - 2] == '\n') {
rv = true;
} else {
fprintf(stderr, "Bad reply from service pipe\n");
}
} else {
perror("Error reading from service pipe");
}
break;
}
reply->append(buf, n);
}
getout:
close(fd);
return rv;
}
static int HandleStopCommand(int argc, char **argv) {
if (argc != 1) {
fprintf(stderr, "Usage: " EXENAME " stop <interface>\n");
return 1;
}
struct sockaddr_un un;
struct stat st;
const char *iface = argv[0];
if (strchr(iface, '/')) {
fprintf(stderr, "No such interface\n");
return 1;
}
snprintf(un.sun_path, sizeof(un.sun_path), "/var/run/wireguard/%s.sock", iface);
if (unlink(un.sun_path) == -1) {
perror("unlink");
return 1;
}
return 0;
}
#endif // defined(OS_POSIX)
void ShowHelp() {
fprintf(stderr,
"Usage: " EXENAME " <cmd> [<args>]\n\n"
#if defined(OS_POSIX)
" " EXENAME " filename.conf\n\n"
#endif // defined(OS_POSIX)
"Available subcommands:\n"
" show: Shows the configuration and status of the interfaces\n"
" set: Change the configuration or the peer list\n"
" start: Start TunSafe on an interface\n"
" stop: Stop TunSafe on an interface\n"
#if defined(OS_WIN)
" log: Display recent log entries\n"
#endif // defined(OS_WIN)
" genkey: Writes a new private key to stdout\n"
" genpsk: Writes a new preshared key to stdout\n"
" pubkey: Reads a private key from stdin and writes its public key to stdout\n"
"To see more help about a subcommand, pass --help to it\n");
}
static bool ParseHexKeyToBase64(const char *key, char base64key[WG_PUBLIC_KEY_LEN_BASE64 + 1]) {
uint8 keybuf[32];
if (!ParseHexString(key, keybuf, 32))
return false;
return base64_encode(keybuf, 32, base64key, WG_PUBLIC_KEY_LEN_BASE64 + 1, NULL) != NULL;
}
static char *FormatTransferPart(char *buf, size_t bufsize, uint64 n) {
if (n < 1024)
snprintf(buf, bufsize, "%u " ANSI_FG_CYAN "B" ANSI_RESET, (unsigned)n);
else if (n < 1024 * 1024)
snprintf(buf, bufsize, "%.2f " ANSI_FG_CYAN "KiB" ANSI_RESET, (double)n * (1.0 / 1024));
else if (n < 1024 * 1024 * 1024)
snprintf(buf, bufsize, "%.2f " ANSI_FG_CYAN "MiB" ANSI_RESET, (double)n * (1.0 / 1024 / 1024));
else if (n < 1024ull * 1024 * 1024 * 1024)
snprintf(buf, bufsize, "%.2f " ANSI_FG_CYAN "GiB" ANSI_RESET, (double)n * (1.0 / 1024 / 1024 / 1024));
else
snprintf(buf, bufsize, "%.2f " ANSI_FG_CYAN "TiB" ANSI_RESET, (double)n * (1.0 / 1024 / 1024 / 1024 / 1024));
return buf;
}
static size_t PrintTime(char *buf, size_t bufsize, uint64 n) {
size_t pos = 0;
uint64 years = n / (365 * 24 * 60 * 60);
uint32 n32 = n % (365 * 24 * 60 * 60);
if (years)
pos += snprintf(buf + pos, bufsize - pos, "%llu " ANSI_FG_CYAN "year%s" ANSI_RESET ", ", (unsigned long long)years, (years == 1) ? "" : "s");
uint32 days = n32 / (24 * 60 * 60);
n32 %= (24 * 60 * 60);
if (days)
pos += snprintf(buf + pos, bufsize - pos, "%u " ANSI_FG_CYAN "day%s" ANSI_RESET ", ", days, (days == 1) ? "" : "s");
uint32 hours = n32 / (60 * 60);
n32 %= (60 * 60);
if (hours)
pos += snprintf(buf + pos, bufsize - pos, "%u " ANSI_FG_CYAN "hour%s" ANSI_RESET ", ", hours, (hours == 1) ? "" : "s");
uint32 minutes = n32 / 60;
if (minutes)
pos += snprintf(buf + pos, bufsize - pos, "%u " ANSI_FG_CYAN "minute%s" ANSI_RESET ", ", minutes, (minutes == 1) ? "" : "s");
uint32 seconds = n32 % 60;
if (seconds)
pos += snprintf(buf + pos, bufsize - pos, "%u " ANSI_FG_CYAN "second%s" ANSI_RESET ", ", seconds, (seconds == 1) ? "" : "s");
if (pos)
buf[pos -= 2] = '\0';
return pos;
}
static char *PrintHandshake(char *buf, size_t bufsize, uint64 secs) {
time_t now = time(NULL);
if (now == secs) {
snprintf(buf, bufsize, "Now");
} else if (now < (int64)secs) {
snprintf(buf, bufsize, ANSI_FG_RED "System clock going backwards" ANSI_RESET);
} else {
size_t pos = PrintTime(buf, bufsize - 4, now - secs);
memcpy(buf + pos, " ago", 5);
}
return buf;
}
static void AppendIpToString(const char *value, std::string *result) {
if (!result->empty())
(*result) += ", ";
const char *slash = strchr(value, '/');
if (slash) {
result->append(value, slash - value);
result->append(ANSI_FG_CYAN "/" ANSI_RESET);
result->append(slash + 1);
} else {
result->append(value);
}
}
static int ShowUserFriendlyForDevice(char *devname) {
std::string reply;
std::vector<std::pair<char*, char*>> kv;
std::string ips;
if (!CommunicateWithService(devname, "get=1\n\n", &reply))
return 1;
if (!ParseConfigKeyValue(&reply[0], &kv)) {
getout_fail:
fprintf(stderr, "Unable to parse response");
return 1;
}
size_t i = 0;
char base64key[WG_PUBLIC_KEY_LEN_BASE64 + 1];
char base64psk[WG_PUBLIC_KEY_LEN_BASE64 + 1];
int listen_port = 0;
base64key[0] = 0;
// Parse all interface level keys
for (; i < kv.size(); i++) {
char *key = kv[i].first, *value = kv[i].second;
if (strcmp(key, "private_key") == 0) {
uint8 binkey[32];
if (!ParseHexString(value, binkey, sizeof(binkey)))
goto getout_fail;
if (!IsOnlyZeros(binkey, 32)) {
curve25519_donna(binkey, binkey, kCurve25519Basepoint);
base64_encode(binkey, sizeof(binkey), base64key, sizeof(base64key), NULL);
}
} else if (strcmp(key, "address") == 0) {
AppendIpToString(value, &ips);
} else if (strcmp(key, "listen_port") == 0) {
listen_port = atoi(value);
} else if (strcmp(key, "public_key") == 0) {
break;
}
}
const char *interfacename = (devname[0] == '{') ? GetInterfaceNameFromGuid(devname) : devname;
printf(ANSI_RESET ANSI_FG_GREEN ANSI_BOLD "interface" ANSI_RESET ": " ANSI_FG_GREEN "%s" ANSI_RESET "\n",
interfacename);
if (base64key[0]) {
printf(" " ANSI_BOLD "public key" ANSI_RESET ": %s\n"
" " ANSI_BOLD "private key" ANSI_RESET ": (hidden)\n", base64key);
}
if (listen_port)
printf(" " ANSI_BOLD "listening port" ANSI_RESET ": %d\n", listen_port);
if (ips.size())
printf(" " ANSI_BOLD "address" ANSI_RESET ": %s\n", ips.c_str());
const char *endpoint = NULL;
uint64 rx_bytes, tx_bytes, last_handshake_time_sec;
int persistent_keepalive;
char text[256];
bool clear_state = true;
// Parse peer level keys
for (; i < kv.size(); i++) {
char *key = kv[i].first, *value = kv[i].second;
if (clear_state) {
base64key[0] = base64psk[0] = 0;
endpoint = NULL;
ips.clear();
persistent_keepalive = 0;
last_handshake_time_sec = tx_bytes = rx_bytes = 0;
clear_state = false;
}
if (strcmp(key, "public_key") == 0) {
if (!ParseHexKeyToBase64(value, base64key))
goto getout_fail;
} else if (strcmp(key, "preshared_key") == 0) {
if (!ParseHexKeyToBase64(value, base64psk))
goto getout_fail;
} else if (strcmp(key, "tx_bytes") == 0) {
tx_bytes = strtoull(value, NULL, 0);
} else if (strcmp(key, "rx_bytes") == 0) {
rx_bytes = strtoull(value, NULL, 0);
} else if (strcmp(key, "allowed_ip") == 0) {
AppendIpToString(value, &ips);
} else if (strcmp(key, "persistent_keepalive_interval") == 0) {
persistent_keepalive = atoi(value);
} else if (strcmp(key, "endpoint") == 0) {
endpoint = value;
} else if (strcmp(key, "last_handshake_time_sec") == 0) {
last_handshake_time_sec = strtoull(value, NULL, 0);
}
if (i == kv.size() - 1 || strcmp(kv[i + 1].first, "public_key") == 0) {
if (!base64key[0])
goto getout_fail;
printf("\n" ANSI_FG_YELLOW ANSI_BOLD "peer" ANSI_RESET ": " ANSI_FG_YELLOW "%s" ANSI_RESET "\n", base64key);
if (base64psk[0])
printf(" " ANSI_BOLD "preshared key" ANSI_RESET ": (hidden)\n");
if (endpoint)
printf(" " ANSI_BOLD "endpoint" ANSI_RESET ": %s\n", endpoint);
printf(" " ANSI_BOLD "allowed ips" ANSI_RESET ": %s\n", ips.size() ? ips.c_str() : "(none)");
if (last_handshake_time_sec)
printf(" " ANSI_BOLD "latest handshake" ANSI_RESET ": %s\n", PrintHandshake(text, sizeof(text), last_handshake_time_sec));
if (tx_bytes | rx_bytes) {
printf(" " ANSI_BOLD "transfer" ANSI_RESET ": %s received, ", FormatTransferPart(text, sizeof(text), rx_bytes));
printf("%s sent\n", FormatTransferPart(text, sizeof(text), tx_bytes));
}
if (persistent_keepalive) {
PrintTime(text, sizeof(text), persistent_keepalive);
printf(" " ANSI_BOLD "persistent keepalive" ANSI_RESET ": every %s\n", text);
}
clear_state = true;
}
}
return 0;
}
static int HandleShowCommand(int argc, char **argv) {
if (argc != 0 && strcmp(argv[0], "--help") == 0) {
fprintf(stderr, "Usage: ts show { <interface> | all | interfaces }\n");
return 0;
}
std::vector<char*> interfaces;
std::string interfaces_str;
if (argc == 0 || strcmp(argv[0], "all") == 0) {
if (!GetInterfaceList(&interfaces_str))
return 1;
SplitString(&interfaces_str[0], '\n', &interfaces);
bool want_newline = false;
for (char *interfac : interfaces) {
if (want_newline)
printf("\n");
want_newline = true;
if (ShowUserFriendlyForDevice(interfac))
return 1;
}
} else if (strcmp(argv[0], "interfaces") == 0) {
if (!GetInterfaceList(&interfaces_str))
return 1;
SplitString(&interfaces_str[0], '\n', &interfaces);
for (char *interfac : interfaces) {
const char *name = GetInterfaceNameFromGuid(interfac);
if (name)
printf("%s\n", name);
}
} else {
return ShowUserFriendlyForDevice(argv[0]);
}
return 0;
}
static void AppendCommand(std::string *result, const char *tag, const char *value) {
result->append(tag);
result->append("=");
result->append(value);
result->append("\n");
}
static bool ConvertBase64KeyToHex(const char *s, char key[65]) {
uint8 tmp[32];
size_t size = 32;
if (!base64_decode((uint8*)s, strlen(s), tmp, &size) || size != 32)
return false;
PrintHexString(tmp, 32, key);
return true;
}
static int HandleSetCommand(int argc, char **argv) {
std::string command, reply;
std::vector<char*> ss;
char hexkey[65];
if (argc == 0) {
fprintf(stderr, "Usage: " EXENAME " set <interface> [address <address>] [listen-port <port>] [private-key <file path>] "
"[peer <base64 public key> [remove] [preshared-key <file path>] [endpoint <ip>:<port>] "
"[persistent-keepalive <interval seconds>] [allowed-ips <ip1>/<cidr1>[,<ip2>/<cidr2>]] ]");
return 1;
}
char **argv_end = argv + argc;
const char *interfc = *argv++;
command = "set=1\n";
bool in_interface_section = true;
bool in_peer_section = false;
bool did_clear_allowed_ips = false;
while (argv != argv_end) {
const char *key = *argv++;
if (argv != argv_end) {
if (in_interface_section) {
if (strcmp(key, "listen-port") == 0) {
AppendCommand(&command, "listen_port", *argv++);
continue;
} else if (strcmp(key, "address") == 0) {
AppendCommand(&command, "address", *argv++);
continue;
} else if (strcmp(key, "private-key") == 0) {
if (!ConvertBase64KeyToHex(*argv++, hexkey))
goto invalid_key_format;
AppendCommand(&command, "private_key", hexkey);
continue;
}
}
if (strcmp(key, "peer") == 0) {
in_interface_section = false;
in_peer_section = true;
did_clear_allowed_ips = false;
if (!ConvertBase64KeyToHex(*argv++, hexkey))
goto invalid_key_format;
AppendCommand(&command, "public_key", hexkey);
continue;
}
if (in_peer_section) {
if (strcmp(key, "preshared-key") == 0) {
if (!ConvertBase64KeyToHex(*argv++, hexkey))
goto invalid_key_format;
AppendCommand(&command, "preshared_key", hexkey);
continue;
} else if (strcmp(key, "endpoint") == 0) {
AppendCommand(&command, "endpoint", *argv++);
continue;
} else if (strcmp(key, "persistent-keepalive") == 0) {
AppendCommand(&command, "persistent_keepalive_interval", *argv++);
continue;
} else if (strcmp(key, "allowed-ips") == 0) {
if (!did_clear_allowed_ips) {
AppendCommand(&command, "replace_allowed_ips", "true");
did_clear_allowed_ips = true;
}
SplitString(*argv++, ',', &ss);
for (char *x : ss)
AppendCommand(&command, "allowed_ip", x);
continue;
}
}
}
if (in_peer_section) {
if (strcmp(key, "remove") == 0) {
in_peer_section = false;
AppendCommand(&command, "remove", "true");
continue;
}
}
fprintf(stderr, "Invalid argument: %s\n", key);
return 1;
invalid_key_format:
fprintf(stderr, "Key is not in the correct format: '%s'\n", argv[-1]);
return 1;
}
command.append("\n");
if (!CommunicateWithService(interfc, command, &reply))
return 1;
return 0;
}
#if defined(OS_WIN)
static int HandleLogCommand() {
HANDLE pipe = ConnectToService(NULL, true);
int message_code;
std::string reply;
while (pipe != NULL && ReadMessageFromService(pipe, &message_code, &reply) && message_code == TS_SERVICE_MSG_LOGLINE)
printf("%s\n", reply.c_str());
CloseHandle(pipe);
return 0;
}
static int HandleStartCommand(int argc, char **argv) {
if (argc < 1 || argc > 2 || strcmp(argv[0], "--help") == 0) {
fprintf(stderr, "Usage: " EXENAME " start <interface> [<filename>]\n");
return 1;
}
const char *devname = argv[0];
HANDLE pipe = ConnectToService(devname, false, true);
int message_code;
std::string reply;
const char *path = (argc == 1) ? "" : argv[1];
// Tell the server to startup a new interface
if (pipe == NULL ||
!SendMessageToService(pipe, TS_SERVICE_REQ_START, path, strlen(path) + 1) ||
!ReadMessageFromService(pipe, &message_code, &reply))
return 1;
if (message_code == TS_SERVICE_MSG_ERROR_REPLY) {
fprintf(stderr, "%s\n", reply.c_str());
return 1;
}
return 0;
}
static int HandleStopCommand(int argc, char **argv) {
if (argc != 1) {
fprintf(stderr, "Usage: " EXENAME " stop <interface>\n");
return 1;
}
const char *devname = argv[0];
HANDLE pipe = ConnectToService(devname, false);
// Tell the server to stop the interface
if (pipe == NULL ||
!SendMessageToService(pipe, TS_SERVICE_REQ_STOP, NULL, 0))
return 1;
return 0;
}
#endif // defined(OS_WIN)
// Returns -1 on invalid subcommand
int HandleCommandLine(int argc, char **argv, CommandLineOutput *output) {
uint8 key[32];
char base64buf[WG_PUBLIC_KEY_LEN_BASE64 + 1];
if (argc == 1) {
ShowHelp();
return 1;
}
const char *subcommand = argv[1];
argv += 2;
argc -= 2;
if (!strcmp(subcommand, "show")) {
return HandleShowCommand(argc, argv);
} else if (!strcmp(subcommand, "set")) {
return HandleSetCommand(argc, argv);
#if defined(OS_WIN)
} else if (!strcmp(subcommand, "log")) {
if (argc != 0) {
fprintf(stderr, "Usage: " EXENAME " log\n");
return 1;
}
return HandleLogCommand();
} else if (!strcmp(subcommand, "start")) {
return HandleStartCommand(argc, argv);
#else
} else if (!strcmp(subcommand, "start") && output) {
if (argc != 0 && !strcmp(argv[0], "--help")) {
start_usage:
fprintf(stderr, "Usage: " EXENAME " start [-d/--daemon] [-n <interface-name>] [<filename>]\n");
return 0;
}
for (; argc; argc--, argv++) {
char *arg = argv[0];
if (strcmp(arg, "-d") == 0 || strcmp(arg, "--daemon") == 0) {
output->daemon = true;
continue;
}
if (strcmp(arg, "-n") == 0) {
if (argc < 2) goto start_usage;
output->interface_name = argv[1];
argc--,argv++;
continue;
}
break;
}
if (argc > 1) goto start_usage;
output->filename_to_load = (argc == 0) ? "" : argv[0];
return 0;
#endif // defined(OS_WIN)
} else if (!strcmp(subcommand, "stop")) {
return HandleStopCommand(argc, argv);
} else if(!strcmp(subcommand, "genkey")) {
if (argc != 0) {
fprintf(stderr, "Usage: " EXENAME " genkey\n");
return 1;
}
OsGetRandomBytes(key, 32);
curve25519_normalize(key);
printf("%s\n", base64_encode(key, 32, base64buf, sizeof(base64buf), NULL));
} else if (!strcmp(subcommand, "genpsk")) {
if (argc != 0) {
fprintf(stderr, "Usage: " EXENAME " genpsk\n");
return 1;
}
OsGetRandomBytes(key, 32);
printf("%s\n", base64_encode(key, 32, base64buf, sizeof(base64buf), NULL));
} else if (!strcmp(subcommand, "pubkey")) {
char base64[WG_PUBLIC_KEY_LEN_BASE64 + 2];
size_t n = fread(base64, 1, sizeof(base64), stdin);
if (n < sizeof(base64) - 2 || n >= sizeof(base64) ||
(n == sizeof(base64) - 1 && (base64[WG_PUBLIC_KEY_LEN_BASE64] != ' ' && base64[WG_PUBLIC_KEY_LEN_BASE64] != '\n'))) {
fprintf(stderr, EXENAME ": Incorrect key format\n");
return 1;
}
size_t size = 32;
if (!base64_decode((uint8*)base64, n, key, &size) || size != 32) {
fprintf(stderr, EXENAME ": Incorrect key format\n");
return 1;
}
curve25519_donna(key, key, kCurve25519Basepoint);
printf("%s\n", base64_encode(key, 32, base64buf, sizeof(base64buf), NULL));
} else if (!strcmp(subcommand, "--help")) {
ShowHelp();
} else if (!strcmp(subcommand, "--version")) {
printf("%s\n", TUNSAFE_VERSION_STRING);
} else {
if (argc == 0) {
if (output)
output->filename_to_load = subcommand;
} else {
ShowHelp();
}
return -1;
}
return 0;
}
#if defined(OS_WIN)
// This is integrated into the main tunsafe binary on posix systems
int main(int argc, char **argv) {
int rv = HandleCommandLine(argc, argv, NULL);
if (rv == -1) {
fprintf(stderr, "Invalid subcommand '%s'\n", argv[1]);
ShowHelp();
return 1;
}
return rv;
}
#endif // defined(OS_WIN)
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