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wireguard-tools/src/show.c  view on Meta::CPAN

{
	static char buf[1024];
	size_t offset;
	time_t now = time(NULL);

	if (now == t->tv_sec)
		strncpy(buf, "Now", sizeof(buf) - 1);
	else if (now < t->tv_sec)
		strncpy(buf, "(" TERMINAL_FG_RED "System clock wound backward; connection problems may ensue." TERMINAL_RESET ")", sizeof(buf) - 1);
	else {
		offset = pretty_time(buf, sizeof(buf), now - t->tv_sec);
		strncpy(buf + offset, " ago", sizeof(buf) - offset - 1);
	}
	buf[sizeof(buf) - 1] = '\0';

	return buf;
}

static char *every(uint16_t seconds)
{
	static char buf[1024] = "every ";

	pretty_time(buf + strlen("every "), sizeof(buf) - strlen("every ") - 1, seconds);
	return buf;
}

static char *bytes(uint64_t b)
{
	static char buf[1024];

	if (b < 1024ULL)
		snprintf(buf, sizeof(buf), "%u " TERMINAL_FG_CYAN "B" TERMINAL_RESET, (unsigned int)b);
	else if (b < 1024ULL * 1024ULL)
		snprintf(buf, sizeof(buf), "%.2f " TERMINAL_FG_CYAN "KiB" TERMINAL_RESET, (double)b / 1024);
	else if (b < 1024ULL * 1024ULL * 1024ULL)
		snprintf(buf, sizeof(buf), "%.2f " TERMINAL_FG_CYAN "MiB" TERMINAL_RESET, (double)b / (1024 * 1024));
	else if (b < 1024ULL * 1024ULL * 1024ULL * 1024ULL)
		snprintf(buf, sizeof(buf), "%.2f " TERMINAL_FG_CYAN "GiB" TERMINAL_RESET, (double)b / (1024 * 1024 * 1024));
	else
		snprintf(buf, sizeof(buf), "%.2f " TERMINAL_FG_CYAN "TiB" TERMINAL_RESET, (double)b / (1024 * 1024 * 1024) / 1024);

	return buf;
}

static const char *COMMAND_NAME;
static void show_usage(void)
{
	fprintf(stderr, "Usage: %s %s { <interface> | all | interfaces } [public-key | private-key | listen-port | fwmark | peers | preshared-keys | endpoints | allowed-ips | latest-handshakes | transfer | persistent-keepalive | dump]\n", PROG_NAME, COMMAND...
}

static void pretty_print(struct wgdevice *device)
{
	struct wgpeer *peer;
	struct wgallowedip *allowedip;

	terminal_printf(TERMINAL_RESET);
	terminal_printf(TERMINAL_FG_GREEN TERMINAL_BOLD "interface" TERMINAL_RESET ": " TERMINAL_FG_GREEN "%s" TERMINAL_RESET "\n", device->name);
	if (device->flags & WGDEVICE_HAS_PUBLIC_KEY)
		terminal_printf("  " TERMINAL_BOLD "public key" TERMINAL_RESET ": %s\n", key(device->public_key));
	if (device->flags & WGDEVICE_HAS_PRIVATE_KEY)
		terminal_printf("  " TERMINAL_BOLD "private key" TERMINAL_RESET ": %s\n", masked_key(device->private_key));
	if (device->listen_port)
		terminal_printf("  " TERMINAL_BOLD "listening port" TERMINAL_RESET ": %u\n", device->listen_port);
	if (device->fwmark)
		terminal_printf("  " TERMINAL_BOLD "fwmark" TERMINAL_RESET ": 0x%x\n", device->fwmark);
	if (device->first_peer) {
		sort_peers(device);
		terminal_printf("\n");
	}
	for_each_wgpeer(device, peer) {
		terminal_printf(TERMINAL_FG_YELLOW TERMINAL_BOLD "peer" TERMINAL_RESET ": " TERMINAL_FG_YELLOW "%s" TERMINAL_RESET "\n", key(peer->public_key));
		if (peer->flags & WGPEER_HAS_PRESHARED_KEY)
			terminal_printf("  " TERMINAL_BOLD "preshared key" TERMINAL_RESET ": %s\n", masked_key(peer->preshared_key));
		if (peer->endpoint.addr.sa_family == AF_INET || peer->endpoint.addr.sa_family == AF_INET6)
			terminal_printf("  " TERMINAL_BOLD "endpoint" TERMINAL_RESET ": %s\n", endpoint(&peer->endpoint.addr));
		terminal_printf("  " TERMINAL_BOLD "allowed ips" TERMINAL_RESET ": ");
		if (peer->first_allowedip) {
			for_each_wgallowedip(peer, allowedip)
				terminal_printf("%s" TERMINAL_FG_CYAN "/" TERMINAL_RESET "%u%s", ip(allowedip), allowedip->cidr, allowedip->next_allowedip ? ", " : "\n");
		} else
			terminal_printf("(none)\n");
		if (peer->last_handshake_time.tv_sec)
			terminal_printf("  " TERMINAL_BOLD "latest handshake" TERMINAL_RESET ": %s\n", ago(&peer->last_handshake_time));
		if (peer->rx_bytes || peer->tx_bytes) {
			terminal_printf("  " TERMINAL_BOLD "transfer" TERMINAL_RESET ": ");
			terminal_printf("%s received, ", bytes(peer->rx_bytes));
			terminal_printf("%s sent\n", bytes(peer->tx_bytes));
		}
		if (peer->persistent_keepalive_interval)
			terminal_printf("  " TERMINAL_BOLD "persistent keepalive" TERMINAL_RESET ": %s\n", every(peer->persistent_keepalive_interval));
		if (peer->next_peer)
			terminal_printf("\n");
	}
}

static void dump_print(struct wgdevice *device, bool with_interface)
{
	struct wgpeer *peer;
	struct wgallowedip *allowedip;

	if (with_interface)
		printf("%s\t", device->name);
	printf("%s\t", maybe_key(device->private_key, device->flags & WGDEVICE_HAS_PRIVATE_KEY));
	printf("%s\t", maybe_key(device->public_key, device->flags & WGDEVICE_HAS_PUBLIC_KEY));
	printf("%u\t", device->listen_port);
	if (device->fwmark)
		printf("0x%x\n", device->fwmark);
	else
		printf("off\n");
	for_each_wgpeer(device, peer) {
		if (with_interface)
			printf("%s\t", device->name);
		printf("%s\t", key(peer->public_key));
		printf("%s\t", maybe_key(peer->preshared_key, peer->flags & WGPEER_HAS_PRESHARED_KEY));
		if (peer->endpoint.addr.sa_family == AF_INET || peer->endpoint.addr.sa_family == AF_INET6)
			printf("%s\t", endpoint(&peer->endpoint.addr));
		else
			printf("(none)\t");
		if (peer->first_allowedip) {
			for_each_wgallowedip(peer, allowedip)
				printf("%s/%u%c", ip(allowedip), allowedip->cidr, allowedip->next_allowedip ? ',' : '\t');
		} else
			printf("(none)\t");
		printf("%llu\t", (unsigned long long)peer->last_handshake_time.tv_sec);
		printf("%" PRIu64 "\t%" PRIu64 "\t", (uint64_t)peer->rx_bytes, (uint64_t)peer->tx_bytes);
		if (peer->persistent_keepalive_interval)
			printf("%u\n", peer->persistent_keepalive_interval);
		else
			printf("off\n");
	}
}

static bool ugly_print(struct wgdevice *device, const char *param, bool with_interface)
{
	struct wgpeer *peer;
	struct wgallowedip *allowedip;

	if (!strcmp(param, "public-key")) {
		if (with_interface)
			printf("%s\t", device->name);
		printf("%s\n", maybe_key(device->public_key, device->flags & WGDEVICE_HAS_PUBLIC_KEY));
	} else if (!strcmp(param, "private-key")) {
		if (with_interface)
			printf("%s\t", device->name);
		printf("%s\n", maybe_key(device->private_key, device->flags & WGDEVICE_HAS_PRIVATE_KEY));
	} else if (!strcmp(param, "listen-port")) {
		if (with_interface)
			printf("%s\t", device->name);
		printf("%u\n", device->listen_port);
	} else if (!strcmp(param, "fwmark")) {
		if (with_interface)
			printf("%s\t", device->name);
		if (device->fwmark)
			printf("0x%x\n", device->fwmark);
		else
			printf("off\n");
	} else if (!strcmp(param, "endpoints")) {
		if (with_interface)
			printf("%s\t", device->name);
		for_each_wgpeer(device, peer) {
			printf("%s\t", key(peer->public_key));
			if (peer->endpoint.addr.sa_family == AF_INET || peer->endpoint.addr.sa_family == AF_INET6)
				printf("%s\n", endpoint(&peer->endpoint.addr));
			else
				printf("(none)\n");
		}
	} else if (!strcmp(param, "allowed-ips")) {
		for_each_wgpeer(device, peer) {
			if (with_interface)
				printf("%s\t", device->name);
			printf("%s\t", key(peer->public_key));
			if (peer->first_allowedip) {
				for_each_wgallowedip(peer, allowedip)
					printf("%s/%u%c", ip(allowedip), allowedip->cidr, allowedip->next_allowedip ? ' ' : '\n');
			} else
				printf("(none)\n");
		}
	} else if (!strcmp(param, "latest-handshakes")) {
		for_each_wgpeer(device, peer) {
			if (with_interface)
				printf("%s\t", device->name);
			printf("%s\t%llu\n", key(peer->public_key), (unsigned long long)peer->last_handshake_time.tv_sec);
		}
	} else if (!strcmp(param, "transfer")) {
		for_each_wgpeer(device, peer) {
			if (with_interface)
				printf("%s\t", device->name);
			printf("%s\t%" PRIu64 "\t%" PRIu64 "\n", key(peer->public_key), (uint64_t)peer->rx_bytes, (uint64_t)peer->tx_bytes);
		}
	} else if (!strcmp(param, "persistent-keepalive")) {
		for_each_wgpeer(device, peer) {
			if (with_interface)
				printf("%s\t", device->name);
			if (peer->persistent_keepalive_interval)
				printf("%s\t%u\n", key(peer->public_key), peer->persistent_keepalive_interval);
			else
				printf("%s\toff\n", key(peer->public_key));
		}
	} else if (!strcmp(param, "preshared-keys")) {
		for_each_wgpeer(device, peer) {
			if (with_interface)
				printf("%s\t", device->name);
			printf("%s\t", key(peer->public_key));
			printf("%s\n", maybe_key(peer->preshared_key, peer->flags & WGPEER_HAS_PRESHARED_KEY));
		}