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

		if (!validate_netmask(new_allowedip))
			fprintf(stderr, "Warning: AllowedIP has nonzero host part: %s/%s\n", ip, mask);

		if (allowedip)
			allowedip->next_allowedip = new_allowedip;
		else
			peer->first_allowedip = new_allowedip;
		allowedip = new_allowedip;
		free(saved_entry);
	}
	free(mutable);
	*last_allowedip = allowedip;
	return true;

err:
	free(new_allowedip);
	free(mutable);
	fprintf(stderr, "AllowedIP is not in the correct format: `%s'\n", saved_entry);
	free(saved_entry);
	return false;
}

static bool process_line(struct config_ctx *ctx, const char *line)
{
	const char *value;
	bool ret = true;

	if (!strcasecmp(line, "[Interface]")) {
		ctx->is_peer_section = false;
		ctx->is_device_section = true;
		return true;
	}
	if (!strcasecmp(line, "[Peer]")) {
		struct wgpeer *new_peer = calloc(1, sizeof(struct wgpeer));

		if (!new_peer) {
			perror("calloc");
			return false;
		}
		ctx->last_allowedip = NULL;
		if (ctx->last_peer)
			ctx->last_peer->next_peer = new_peer;
		else
			ctx->device->first_peer = new_peer;
		ctx->last_peer = new_peer;
		ctx->is_peer_section = true;
		ctx->is_device_section = false;
		ctx->last_peer->flags |= WGPEER_REPLACE_ALLOWEDIPS;
		return true;
	}

#define key_match(key) (value = get_value(line, key "="))

	if (ctx->is_device_section) {
		if (key_match("ListenPort"))
			ret = parse_port(&ctx->device->listen_port, &ctx->device->flags, value);
		else if (key_match("FwMark"))
			ret = parse_fwmark(&ctx->device->fwmark, &ctx->device->flags, value);
		else if (key_match("PrivateKey")) {
			ret = parse_key(ctx->device->private_key, value);
			if (ret)
				ctx->device->flags |= WGDEVICE_HAS_PRIVATE_KEY;
		} else
			goto error;
	} else if (ctx->is_peer_section) {
		if (key_match("Endpoint"))
			ret = parse_endpoint(&ctx->last_peer->endpoint.addr, value);
		else if (key_match("PublicKey")) {
			ret = parse_key(ctx->last_peer->public_key, value);
			if (ret)
				ctx->last_peer->flags |= WGPEER_HAS_PUBLIC_KEY;
		} else if (key_match("AllowedIPs"))
			ret = parse_allowedips(ctx->last_peer, &ctx->last_allowedip, value);
		else if (key_match("PersistentKeepalive"))
			ret = parse_persistent_keepalive(&ctx->last_peer->persistent_keepalive_interval, &ctx->last_peer->flags, value);
		else if (key_match("PresharedKey")) {
			ret = parse_key(ctx->last_peer->preshared_key, value);
			if (ret)
				ctx->last_peer->flags |= WGPEER_HAS_PRESHARED_KEY;
		} else
			goto error;
	} else
		goto error;
	return ret;

#undef key_match

error:
	fprintf(stderr, "Line unrecognized: `%s'\n", line);
	return false;
}

bool config_read_line(struct config_ctx *ctx, const char *input)
{
	size_t len, cleaned_len = 0;
	char *line, *comment;
	bool ret = true;

	/* This is what strchrnul is for, but that isn't portable. */
	comment = strchr(input, COMMENT_CHAR);
	if (comment)
		len = comment - input;
	else
		len = strlen(input);

	line = calloc(len + 1, sizeof(char));
	if (!line) {
		perror("calloc");
		ret = false;
		goto out;
	}

	for (size_t i = 0; i < len; ++i) {
		if (!char_is_space(input[i]))
			line[cleaned_len++] = input[i];
	}
	if (!cleaned_len)
		goto out;
	ret = process_line(ctx, line);
out:

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

		ctx->device->flags |= WGDEVICE_REPLACE_PEERS | WGDEVICE_HAS_PRIVATE_KEY | WGDEVICE_HAS_FWMARK | WGDEVICE_HAS_LISTEN_PORT;
	return true;
}

struct wgdevice *config_read_finish(struct config_ctx *ctx)
{
	struct wgpeer *peer;

	for_each_wgpeer(ctx->device, peer) {
		if (!(peer->flags & WGPEER_HAS_PUBLIC_KEY)) {
			fprintf(stderr, "A peer is missing a public key\n");
			goto err;
		}
	}
	return ctx->device;
err:
	free_wgdevice(ctx->device);
	return NULL;
}

static char *strip_spaces(const char *in)
{
	char *out;
	size_t t, l, i;

	t = strlen(in);
	out = calloc(t + 1, sizeof(char));
	if (!out) {
		perror("calloc");
		return NULL;
	}
	for (i = 0, l = 0; i < t; ++i) {
		if (!char_is_space(in[i]))
			out[l++] = in[i];
	}
	return out;
}

struct wgdevice *config_read_cmd(const char *argv[], int argc)
{
	struct wgdevice *device = calloc(1, sizeof(*device));
	struct wgpeer *peer = NULL;
	struct wgallowedip *allowedip = NULL;

	if (!device) {
		perror("calloc");
		return false;
	}
	while (argc > 0) {
		if (!strcmp(argv[0], "listen-port") && argc >= 2 && !peer) {
			if (!parse_port(&device->listen_port, &device->flags, argv[1]))
				goto error;
			argv += 2;
			argc -= 2;
		} else if (!strcmp(argv[0], "fwmark") && argc >= 2 && !peer) {
			if (!parse_fwmark(&device->fwmark, &device->flags, argv[1]))
				goto error;
			argv += 2;
			argc -= 2;
		} else if (!strcmp(argv[0], "private-key") && argc >= 2 && !peer) {
			if (!parse_keyfile(device->private_key, argv[1]))
				goto error;
			device->flags |= WGDEVICE_HAS_PRIVATE_KEY;
			argv += 2;
			argc -= 2;
		} else if (!strcmp(argv[0], "peer") && argc >= 2) {
			struct wgpeer *new_peer = calloc(1, sizeof(*new_peer));

			allowedip = NULL;
			if (!new_peer) {
				perror("calloc");
				goto error;
			}
			if (peer)
				peer->next_peer = new_peer;
			else
				device->first_peer = new_peer;
			peer = new_peer;
			if (!parse_key(peer->public_key, argv[1]))
				goto error;
			peer->flags |= WGPEER_HAS_PUBLIC_KEY;
			argv += 2;
			argc -= 2;
		} else if (!strcmp(argv[0], "remove") && argc >= 1 && peer) {
			peer->flags |= WGPEER_REMOVE_ME;
			argv += 1;
			argc -= 1;
		} else if (!strcmp(argv[0], "endpoint") && argc >= 2 && peer) {
			if (!parse_endpoint(&peer->endpoint.addr, argv[1]))
				goto error;
			argv += 2;
			argc -= 2;
		} else if (!strcmp(argv[0], "allowed-ips") && argc >= 2 && peer) {
			char *line = strip_spaces(argv[1]);

			if (!line)
				goto error;
			if (!parse_allowedips(peer, &allowedip, line)) {
				free(line);
				goto error;
			}
			free(line);
			argv += 2;
			argc -= 2;
		} else if (!strcmp(argv[0], "persistent-keepalive") && argc >= 2 && peer) {
			if (!parse_persistent_keepalive(&peer->persistent_keepalive_interval, &peer->flags, argv[1]))
				goto error;
			argv += 2;
			argc -= 2;
		} else if (!strcmp(argv[0], "preshared-key") && argc >= 2 && peer) {
			if (!parse_keyfile(peer->preshared_key, argv[1]))
				goto error;
			peer->flags |= WGPEER_HAS_PRESHARED_KEY;
			argv += 2;
			argc -= 2;
		} else {
			fprintf(stderr, "Invalid argument: %s\n", argv[0]);
			goto error;
		}
	}
	return device;