[mirror_frr.git] / bfdd / config.c

/*********************************************************************
 * Copyright 2017-2018 Network Device Education Foundation, Inc. ("NetDEF")
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; see the file COPYING; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * config.c: implements the BFD daemon configuration handling.
 *
 * Authors
 * -------
 * Rafael Zalamena <rzalamena@opensourcerouting.org>
 */

#include <zebra.h>

#include <string.h>

#include "lib/json.h"

#include "bfd.h"

DEFINE_MTYPE_STATIC(BFDD, BFDD_LABEL, "long-lived label memory")

/*
 * Definitions
 */
enum peer_list_type {
	PLT_IPV4,
	PLT_IPV6,
	PLT_LABEL,
};


/*
 * Prototypes
 */
static int parse_config_json(struct json_object *jo, bpc_handle h, void *arg);
static int parse_list(struct json_object *jo, enum peer_list_type plt,
		      bpc_handle h, void *arg);
static int parse_peer_config(struct json_object *jo, struct bfd_peer_cfg *bpc);
static int parse_peer_label_config(struct json_object *jo,
				   struct bfd_peer_cfg *bpc);

static int config_add(struct bfd_peer_cfg *bpc, void *arg);
static int config_del(struct bfd_peer_cfg *bpc, void *arg);

static int json_object_add_peer(struct json_object *jo, struct bfd_session *bs);


/*
 * Implementation
 */
static int config_add(struct bfd_peer_cfg *bpc,
		      void *arg __attribute__((unused)))
{
	return ptm_bfd_sess_new(bpc) == NULL;
}

static int config_del(struct bfd_peer_cfg *bpc,
		      void *arg __attribute__((unused)))
{
	return ptm_bfd_sess_del(bpc) != 0;
}

static int parse_config_json(struct json_object *jo, bpc_handle h, void *arg)
{
	const char *key, *sval;
	struct json_object *jo_val;
	struct json_object_iterator joi, join;
	int error = 0;

	JSON_FOREACH (jo, joi, join) {
		key = json_object_iter_peek_name(&joi);
		jo_val = json_object_iter_peek_value(&joi);

		if (strcmp(key, "ipv4") == 0) {
			error += parse_list(jo_val, PLT_IPV4, h, arg);
		} else if (strcmp(key, "ipv6") == 0) {
			error += parse_list(jo_val, PLT_IPV6, h, arg);
		} else if (strcmp(key, "label") == 0) {
			error += parse_list(jo_val, PLT_LABEL, h, arg);
		} else {
			sval = json_object_get_string(jo_val);
			log_warning("%s:%d invalid configuration: %s", __func__,
				    __LINE__, sval);
			error++;
		}
	}

	/*
	 * Our callers never call free() on json_object and only expect
	 * the return value, so lets free() it here.
	 */
	json_object_put(jo);

	return error;
}

int parse_config(const char *fname)
{
	struct json_object *jo;

	jo = json_object_from_file(fname);
	if (jo == NULL)
		return -1;

	return parse_config_json(jo, config_add, NULL);
}

static int parse_list(struct json_object *jo, enum peer_list_type plt,
		      bpc_handle h, void *arg)
{
	struct json_object *jo_val;
	struct bfd_peer_cfg bpc;
	int allen, idx;
	int error = 0, result;

	allen = json_object_array_length(jo);
	for (idx = 0; idx < allen; idx++) {
		jo_val = json_object_array_get_idx(jo, idx);

		/* Set defaults. */
		memset(&bpc, 0, sizeof(bpc));
		bpc.bpc_detectmultiplier = BFD_DEFDETECTMULT;
		bpc.bpc_recvinterval = BFD_DEFREQUIREDMINRX;
		bpc.bpc_txinterval = BFD_DEFDESIREDMINTX;
		bpc.bpc_echointerval = BFD_DEF_REQ_MIN_ECHO;

		switch (plt) {
		case PLT_IPV4:
			log_debug("ipv4 peers %d:", allen);
			bpc.bpc_ipv4 = true;
			break;
		case PLT_IPV6:
			log_debug("ipv6 peers %d:", allen);
			bpc.bpc_ipv4 = false;
			break;
		case PLT_LABEL:
			log_debug("label peers %d:", allen);
			if (parse_peer_label_config(jo_val, &bpc) != 0) {
				error++;
				continue;
			}
			break;

		default:
			error++;
			log_error("%s:%d: unsupported peer type", __func__,
				  __LINE__);
			break;
		}

		result = parse_peer_config(jo_val, &bpc);
		error += result;
		if (result == 0)
			error += (h(&bpc, arg) != 0);
	}

	return error;
}

static int parse_peer_config(struct json_object *jo, struct bfd_peer_cfg *bpc)
{
	const char *key, *sval;
	struct json_object *jo_val;
	struct json_object_iterator joi, join;
	int family_type = (bpc->bpc_ipv4) ? AF_INET : AF_INET6;
	int error = 0;

	log_debug("\tpeer: %s", bpc->bpc_ipv4 ? "ipv4" : "ipv6");

	JSON_FOREACH (jo, joi, join) {
		key = json_object_iter_peek_name(&joi);
		jo_val = json_object_iter_peek_value(&joi);

		if (strcmp(key, "multihop") == 0) {
			bpc->bpc_mhop = json_object_get_boolean(jo_val);
			log_debug("\tmultihop: %s",
				  bpc->bpc_mhop ? "true" : "false");
		} else if (strcmp(key, "peer-address") == 0) {
			sval = json_object_get_string(jo_val);
			if (strtosa(sval, &bpc->bpc_peer) != 0
			    || bpc->bpc_peer.sa_sin.sin_family != family_type) {
				log_info(
					"%s:%d failed to parse peer-address '%s'",
					__func__, __LINE__, sval);
				error++;
			}
			log_debug("\tpeer-address: %s", sval);
		} else if (strcmp(key, "local-address") == 0) {
			sval = json_object_get_string(jo_val);
			if (strtosa(sval, &bpc->bpc_local) != 0
			    || bpc->bpc_local.sa_sin.sin_family
				       != family_type) {
				log_info(
					"%s:%d failed to parse local-address '%s'",
					__func__, __LINE__, sval);
				error++;
			}
			log_debug("\tlocal-address: %s", sval);
		} else if (strcmp(key, "local-interface") == 0) {
			bpc->bpc_has_localif = true;
			sval = json_object_get_string(jo_val);
			if (strlcpy(bpc->bpc_localif, sval,
				    sizeof(bpc->bpc_localif))
			    > sizeof(bpc->bpc_localif)) {
				log_debug("\tlocal-interface: %s (truncated)",
					  sval);
				error++;
			} else {
				log_debug("\tlocal-interface: %s", sval);
			}
		} else if (strcmp(key, "vrf-name") == 0) {
			bpc->bpc_has_vrfname = true;
			sval = json_object_get_string(jo_val);
			if (strlcpy(bpc->bpc_vrfname, sval,
				    sizeof(bpc->bpc_vrfname))
			    > sizeof(bpc->bpc_vrfname)) {
				log_debug("\tvrf-name: %s (truncated)", sval);
				error++;
			} else {
				log_debug("\tvrf-name: %s", sval);
			}
		} else if (strcmp(key, "detect-multiplier") == 0) {
			bpc->bpc_detectmultiplier =
				json_object_get_int64(jo_val);
			bpc->bpc_has_detectmultiplier = true;
			log_debug("\tdetect-multiplier: %u",
				  bpc->bpc_detectmultiplier);
		} else if (strcmp(key, "receive-interval") == 0) {
			bpc->bpc_recvinterval = json_object_get_int64(jo_val);
			bpc->bpc_has_recvinterval = true;
			log_debug("\treceive-interval: %llu",
				  bpc->bpc_recvinterval);
		} else if (strcmp(key, "transmit-interval") == 0) {
			bpc->bpc_txinterval = json_object_get_int64(jo_val);
			bpc->bpc_has_txinterval = true;
			log_debug("\ttransmit-interval: %llu",
				  bpc->bpc_txinterval);
		} else if (strcmp(key, "echo-interval") == 0) {
			bpc->bpc_echointerval = json_object_get_int64(jo_val);
			bpc->bpc_has_echointerval = true;
			log_debug("\techo-interval: %llu",
				  bpc->bpc_echointerval);
		} else if (strcmp(key, "create-only") == 0) {
			bpc->bpc_createonly = json_object_get_boolean(jo_val);
			log_debug("\tcreate-only: %s",
				  bpc->bpc_createonly ? "true" : "false");
		} else if (strcmp(key, "shutdown") == 0) {
			bpc->bpc_shutdown = json_object_get_boolean(jo_val);
			log_debug("\tshutdown: %s",
				  bpc->bpc_shutdown ? "true" : "false");
		} else if (strcmp(key, "echo-mode") == 0) {
			bpc->bpc_echo = json_object_get_boolean(jo_val);
			log_debug("\techo-mode: %s",
				  bpc->bpc_echo ? "true" : "false");
		} else if (strcmp(key, "label") == 0) {
			bpc->bpc_has_label = true;
			sval = json_object_get_string(jo_val);
			if (strlcpy(bpc->bpc_label, sval,
				    sizeof(bpc->bpc_label))
			    > sizeof(bpc->bpc_label)) {
				log_debug("\tlabel: %s (truncated)", sval);
				error++;
			} else {
				log_debug("\tlabel: %s", sval);
			}
		} else {
			sval = json_object_get_string(jo_val);
			log_warning("%s:%d invalid configuration: '%s: %s'",
				    __func__, __LINE__, key, sval);
			error++;
		}
	}

	if (bpc->bpc_peer.sa_sin.sin_family == 0) {
		log_debug("%s:%d no peer address provided", __func__, __LINE__);
		error++;
	}

	return error;
}

static int parse_peer_label_config(struct json_object *jo,
				   struct bfd_peer_cfg *bpc)
{
	struct peer_label *pl;
	struct json_object *label;
	const char *sval;

	/* Get label and translate it to BFD daemon key. */
	if (!json_object_object_get_ex(jo, "label", &label))
		return 1;

	sval = json_object_get_string(label);

	pl = pl_find(sval);
	if (pl == NULL)
		return 1;

	log_debug("\tpeer-label: %s", sval);

	/* Translate the label into BFD address keys. */
	bs_to_bpc(pl->pl_bs, bpc);

	return 0;
}


/*
 * Control socket JSON parsing.
 */
int config_request_add(const char *jsonstr)
{
	struct json_object *jo;

	jo = json_tokener_parse(jsonstr);
	if (jo == NULL)
		return -1;

	return parse_config_json(jo, config_add, NULL);
}

int config_request_del(const char *jsonstr)
{
	struct json_object *jo;

	jo = json_tokener_parse(jsonstr);
	if (jo == NULL)
		return -1;

	return parse_config_json(jo, config_del, NULL);
}

char *config_response(const char *status, const char *error)
{
	struct json_object *resp, *jo;
	char *jsonstr;

	resp = json_object_new_object();
	if (resp == NULL)
		return NULL;

	/* Add 'status' response key. */
	jo = json_object_new_string(status);
	if (jo == NULL) {
		json_object_put(resp);
		return NULL;
	}

	json_object_object_add(resp, "status", jo);

	/* Add 'error' response key. */
	if (error != NULL) {
		jo = json_object_new_string(error);
		if (jo == NULL) {
			json_object_put(resp);
			return NULL;
		}

		json_object_object_add(resp, "error", jo);
	}

	/* Generate JSON response. */
	jsonstr = XSTRDUP(
		MTYPE_BFDD_NOTIFICATION,
		json_object_to_json_string_ext(resp, BFDD_JSON_CONV_OPTIONS));
	json_object_put(resp);

	return jsonstr;
}

char *config_notify(struct bfd_session *bs)
{
	struct json_object *resp;
	char *jsonstr;
	time_t now;

	resp = json_object_new_object();
	if (resp == NULL)
		return NULL;

	json_object_string_add(resp, "op", BCM_NOTIFY_PEER_STATUS);

	json_object_add_peer(resp, bs);

	/* Add status information */
	json_object_int_add(resp, "id", bs->discrs.my_discr);
	json_object_int_add(resp, "remote-id", bs->discrs.my_discr);

	switch (bs->ses_state) {
	case PTM_BFD_UP:
		json_object_string_add(resp, "state", "up");

		now = monotime(NULL);
		json_object_int_add(resp, "uptime", now - bs->uptime.tv_sec);
		break;
	case PTM_BFD_ADM_DOWN:
		json_object_string_add(resp, "state", "adm-down");
		break;
	case PTM_BFD_DOWN:
		json_object_string_add(resp, "state", "down");

		now = monotime(NULL);
		json_object_int_add(resp, "downtime",
				    now - bs->downtime.tv_sec);
		break;
	case PTM_BFD_INIT:
		json_object_string_add(resp, "state", "init");
		break;

	default:
		json_object_string_add(resp, "state", "unknown");
		break;
	}

	json_object_int_add(resp, "diagnostics", bs->local_diag);
	json_object_int_add(resp, "remote-diagnostics", bs->remote_diag);

	/* Generate JSON response. */
	jsonstr = XSTRDUP(
		MTYPE_BFDD_NOTIFICATION,
		json_object_to_json_string_ext(resp, BFDD_JSON_CONV_OPTIONS));
	json_object_put(resp);

	return jsonstr;
}

char *config_notify_config(const char *op, struct bfd_session *bs)
{
	struct json_object *resp;
	char *jsonstr;

	resp = json_object_new_object();
	if (resp == NULL)
		return NULL;

	json_object_string_add(resp, "op", op);

	json_object_add_peer(resp, bs);

	/* On peer deletion we don't need to add any additional information. */
	if (strcmp(op, BCM_NOTIFY_CONFIG_DELETE) == 0)
		goto skip_config;

	json_object_int_add(resp, "detect-multiplier", bs->detect_mult);
	json_object_int_add(resp, "receive-interval",
			    bs->timers.required_min_rx / 1000);
	json_object_int_add(resp, "transmit-interval",
			    bs->timers.desired_min_tx / 1000);
	json_object_int_add(resp, "echo-interval",
			    bs->timers.required_min_echo / 1000);

	json_object_int_add(resp, "remote-detect-multiplier",
			    bs->remote_detect_mult);
	json_object_int_add(resp, "remote-receive-interval",
			    bs->remote_timers.required_min_rx / 1000);
	json_object_int_add(resp, "remote-transmit-interval",
			    bs->remote_timers.desired_min_tx / 1000);
	json_object_int_add(resp, "remote-echo-interval",
			    bs->remote_timers.required_min_echo / 1000);

	if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_ECHO))
		json_object_boolean_true_add(resp, "echo-mode");
	else
		json_object_boolean_false_add(resp, "echo-mode");

	if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN))
		json_object_boolean_true_add(resp, "shutdown");
	else
		json_object_boolean_false_add(resp, "shutdown");

skip_config:
	/* Generate JSON response. */
	jsonstr = XSTRDUP(
		MTYPE_BFDD_NOTIFICATION,
		json_object_to_json_string_ext(resp, BFDD_JSON_CONV_OPTIONS));
	json_object_put(resp);

	return jsonstr;
}

int config_notify_request(struct bfd_control_socket *bcs, const char *jsonstr,
			  bpc_handle bh)
{
	struct json_object *jo;

	jo = json_tokener_parse(jsonstr);
	if (jo == NULL)
		return -1;

	return parse_config_json(jo, bh, bcs);
}

static int json_object_add_peer(struct json_object *jo, struct bfd_session *bs)
{
	char addr_buf[INET6_ADDRSTRLEN];

	/* Add peer 'key' information. */
	if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_IPV6))
		json_object_boolean_true_add(jo, "ipv6");
	else
		json_object_boolean_false_add(jo, "ipv6");

	if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_MH)) {
		json_object_boolean_true_add(jo, "multihop");
		json_object_string_add(jo, "peer-address",
				       inet_ntop(bs->key.family, &bs->key.peer,
						 addr_buf, sizeof(addr_buf)));
		json_object_string_add(jo, "local-address",
				       inet_ntop(bs->key.family, &bs->key.local,
						 addr_buf, sizeof(addr_buf)));
		if (bs->key.vrfname[0])
			json_object_string_add(jo, "vrf-name", bs->key.vrfname);
	} else {
		json_object_boolean_false_add(jo, "multihop");
		json_object_string_add(jo, "peer-address",
				       inet_ntop(bs->key.family, &bs->key.peer,
						 addr_buf, sizeof(addr_buf)));
		if (memcmp(&bs->key.local, &zero_addr, sizeof(bs->key.local)))
			json_object_string_add(
				jo, "local-address",
				inet_ntop(bs->key.family, &bs->key.local,
					  addr_buf, sizeof(addr_buf)));
		if (bs->key.ifname[0])
			json_object_string_add(jo, "local-interface",
					       bs->key.ifname);
	}

	if (bs->pl)
		json_object_string_add(jo, "label", bs->pl->pl_label);

	return 0;
}


/*
 * Label handling
 */
struct peer_label *pl_find(const char *label)
{
	struct peer_label *pl;

	TAILQ_FOREACH (pl, &bglobal.bg_pllist, pl_entry) {
		if (strcmp(pl->pl_label, label) != 0)
			continue;

		return pl;
	}

	return NULL;
}

struct peer_label *pl_new(const char *label, struct bfd_session *bs)
{
	struct peer_label *pl;

	pl = XCALLOC(MTYPE_BFDD_LABEL, sizeof(*pl));

	if (strlcpy(pl->pl_label, label, sizeof(pl->pl_label))
	    > sizeof(pl->pl_label))
		log_warning("%s:%d: label was truncated", __func__, __LINE__);

	pl->pl_bs = bs;
	bs->pl = pl;

	TAILQ_INSERT_HEAD(&bglobal.bg_pllist, pl, pl_entry);

	return pl;
}

void pl_free(struct peer_label *pl)
{
	if (pl == NULL)
		return;

	/* Remove the pointer back. */
	pl->pl_bs->pl = NULL;

	TAILQ_REMOVE(&bglobal.bg_pllist, pl, pl_entry);
	XFREE(MTYPE_BFDD_LABEL, pl);
}
Commit	Line	Data
e9e2c950 RZ	1	/*********************************************************************
	2	* Copyright 2017-2018 Network Device Education Foundation, Inc. ("NetDEF")
	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms of the GNU General Public License as published by the Free
	6	* Software Foundation; either version 2 of the License, or (at your option)
	7	* any later version.
	8	*
	9	* This program is distributed in the hope that it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
	13	*
	14	* You should have received a copy of the GNU General Public License along
	15	* with this program; see the file COPYING; if not, write to the Free Software
	16	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	17	*
	18	* config.c: implements the BFD daemon configuration handling.
	19	*
	20	* Authors
	21	* -------
	22	* Rafael Zalamena <rzalamena@opensourcerouting.org>
	23	*/
	24
	25	#include <zebra.h>
	26
	27	#include <string.h>
	28
	29	#include "lib/json.h"
	30
	31	#include "bfd.h"
	32
1b88c3cb DL	33	DEFINE_MTYPE_STATIC(BFDD, BFDD_LABEL, "long-lived label memory")
1b88c3cb DL	34
e9e2c950 RZ	35	/*
	36	* Definitions
	37	*/
	38	enum peer_list_type {
	39	PLT_IPV4,
	40	PLT_IPV6,
	41	PLT_LABEL,
	42	};
	43
	44
	45	/*
	46	* Prototypes
	47	*/
	48	static int parse_config_json(struct json_object jo, bpc_handle h, void arg);
	49	static int parse_list(struct json_object *jo, enum peer_list_type plt,
	50	bpc_handle h, void *arg);
	51	static int parse_peer_config(struct json_object jo, struct bfd_peer_cfg bpc);
	52	static int parse_peer_label_config(struct json_object *jo,
	53	struct bfd_peer_cfg *bpc);
	54
	55	static int config_add(struct bfd_peer_cfg bpc, void arg);
	56	static int config_del(struct bfd_peer_cfg bpc, void arg);
	57
	58	static int json_object_add_peer(struct json_object jo, struct bfd_session bs);
	59
	60
	61	/*
	62	* Implementation
	63	*/
	64	static int config_add(struct bfd_peer_cfg *bpc,
	65	void *arg __attribute__((unused)))
	66	{
	67	return ptm_bfd_sess_new(bpc) == NULL;
	68	}
	69
	70	static int config_del(struct bfd_peer_cfg *bpc,
	71	void *arg __attribute__((unused)))
	72	{
bc50bcc8	73	return ptm_bfd_sess_del(bpc) != 0;
e9e2c950 RZ	74	}
	75
	76	static int parse_config_json(struct json_object jo, bpc_handle h, void arg)
	77	{
	78	const char key, sval;
	79	struct json_object *jo_val;
	80	struct json_object_iterator joi, join;
	81	int error = 0;
	82
	83	JSON_FOREACH (jo, joi, join) {
	84	key = json_object_iter_peek_name(&joi);
	85	jo_val = json_object_iter_peek_value(&joi);
	86
	87	if (strcmp(key, "ipv4") == 0) {
	88	error += parse_list(jo_val, PLT_IPV4, h, arg);
	89	} else if (strcmp(key, "ipv6") == 0) {
	90	error += parse_list(jo_val, PLT_IPV6, h, arg);
	91	} else if (strcmp(key, "label") == 0) {
	92	error += parse_list(jo_val, PLT_LABEL, h, arg);
	93	} else {
	94	sval = json_object_get_string(jo_val);
	95	log_warning("%s:%d invalid configuration: %s", __func__,
	96	__LINE__, sval);
	97	error++;
	98	}
	99	}
	100
	101	/*
	102	* Our callers never call free() on json_object and only expect
	103	* the return value, so lets free() it here.
	104	*/
	105	json_object_put(jo);
	106
	107	return error;
	108	}
	109
	110	int parse_config(const char *fname)
	111	{
	112	struct json_object *jo;
	113
	114	jo = json_object_from_file(fname);
	115	if (jo == NULL)
	116	return -1;
	117
	118	return parse_config_json(jo, config_add, NULL);
	119	}
	120
	121	static int parse_list(struct json_object *jo, enum peer_list_type plt,
	122	bpc_handle h, void *arg)
	123	{
	124	struct json_object *jo_val;
	125	struct bfd_peer_cfg bpc;
	126	int allen, idx;
	127	int error = 0, result;
	128
	129	allen = json_object_array_length(jo);
	130	for (idx = 0; idx < allen; idx++) {
	131	jo_val = json_object_array_get_idx(jo, idx);
	132
	133	/* Set defaults. */
	134	memset(&bpc, 0, sizeof(bpc));
	135	bpc.bpc_detectmultiplier = BFD_DEFDETECTMULT;
	136	bpc.bpc_recvinterval = BFD_DEFREQUIREDMINRX;
	137	bpc.bpc_txinterval = BFD_DEFDESIREDMINTX;
138	bpc.bpc_echointerval = BFD_DEF_REQ_MIN_ECHO;
139
140	switch (plt) {
141	case PLT_IPV4:
142	log_debug("ipv4 peers %d:", allen);
143	bpc.bpc_ipv4 = true;
144	break;
145	case PLT_IPV6:
146	log_debug("ipv6 peers %d:", allen);
147	bpc.bpc_ipv4 = false;
148	break;
149	case PLT_LABEL:
150	log_debug("label peers %d:", allen);
151	if (parse_peer_label_config(jo_val, &bpc) != 0) {
152	error++;
153	continue;
154	}
155	break;
156
157	default:
158	error++;
159	log_error("%s:%d: unsupported peer type", __func__,
160	__LINE__);
161	break;
162	}
163
164	result = parse_peer_config(jo_val, &bpc);
165	error += result;
166	if (result == 0)
167	error += (h(&bpc, arg) != 0);
168	}
169
170	return error;
171	}
172
173	static int parse_peer_config(struct json_object jo, struct bfd_peer_cfg bpc)
174	{
175	const char key, sval;
176	struct json_object *jo_val;
177	struct json_object_iterator joi, join;
178	int family_type = (bpc->bpc_ipv4) ? AF_INET : AF_INET6;
179	int error = 0;
180
181	log_debug("\tpeer: %s", bpc->bpc_ipv4 ? "ipv4" : "ipv6");
182
183	JSON_FOREACH (jo, joi, join) {
184	key = json_object_iter_peek_name(&joi);
185	jo_val = json_object_iter_peek_value(&joi);
186
187	if (strcmp(key, "multihop") == 0) {
188	bpc->bpc_mhop = json_object_get_boolean(jo_val);
189	log_debug("\tmultihop: %s",
190	bpc->bpc_mhop ? "true" : "false");
191	} else if (strcmp(key, "peer-address") == 0) {
192	sval = json_object_get_string(jo_val);
193	if (strtosa(sval, &bpc->bpc_peer) != 0
194	\|\| bpc->bpc_peer.sa_sin.sin_family != family_type) {
195	log_info(
196	"%s:%d failed to parse peer-address '%s'",
197	__func__, __LINE__, sval);
198	error++;
199	}
200	log_debug("\tpeer-address: %s", sval);
201	} else if (strcmp(key, "local-address") == 0) {
202	sval = json_object_get_string(jo_val);
203	if (strtosa(sval, &bpc->bpc_local) != 0
204	\|\| bpc->bpc_local.sa_sin.sin_family
205	!= family_type) {
206	log_info(
207	"%s:%d failed to parse local-address '%s'",
208	__func__, __LINE__, sval);
209	error++;
210	}
211	log_debug("\tlocal-address: %s", sval);
212	} else if (strcmp(key, "local-interface") == 0) {
213	bpc->bpc_has_localif = true;
214	sval = json_object_get_string(jo_val);
215	if (strlcpy(bpc->bpc_localif, sval,
216	sizeof(bpc->bpc_localif))
217	> sizeof(bpc->bpc_localif)) {
b7b3d466 DL	218	log_debug("\tlocal-interface: %s (truncated)",
b7b3d466 DL	219	sval);
e9e2c950 RZ	220	error++;
	221	} else {
	222	log_debug("\tlocal-interface: %s", sval);
	223	}
e9e2c950 RZ	224	} else if (strcmp(key, "vrf-name") == 0) {
	225	bpc->bpc_has_vrfname = true;
	226	sval = json_object_get_string(jo_val);
	227	if (strlcpy(bpc->bpc_vrfname, sval,
	228	sizeof(bpc->bpc_vrfname))
	229	> sizeof(bpc->bpc_vrfname)) {
	230	log_debug("\tvrf-name: %s (truncated)", sval);
	231	error++;
	232	} else {
	233	log_debug("\tvrf-name: %s", sval);
	234	}
	235	} else if (strcmp(key, "detect-multiplier") == 0) {
	236	bpc->bpc_detectmultiplier =
	237	json_object_get_int64(jo_val);
	238	bpc->bpc_has_detectmultiplier = true;
b7b3d466	239	log_debug("\tdetect-multiplier: %u",
e9e2c950 RZ	240	bpc->bpc_detectmultiplier);
	241	} else if (strcmp(key, "receive-interval") == 0) {
	242	bpc->bpc_recvinterval = json_object_get_int64(jo_val);
	243	bpc->bpc_has_recvinterval = true;
	244	log_debug("\treceive-interval: %llu",
	245	bpc->bpc_recvinterval);
	246	} else if (strcmp(key, "transmit-interval") == 0) {
	247	bpc->bpc_txinterval = json_object_get_int64(jo_val);
	248	bpc->bpc_has_txinterval = true;
	249	log_debug("\ttransmit-interval: %llu",
	250	bpc->bpc_txinterval);
	251	} else if (strcmp(key, "echo-interval") == 0) {
	252	bpc->bpc_echointerval = json_object_get_int64(jo_val);
	253	bpc->bpc_has_echointerval = true;
	254	log_debug("\techo-interval: %llu",
	255	bpc->bpc_echointerval);
	256	} else if (strcmp(key, "create-only") == 0) {
	257	bpc->bpc_createonly = json_object_get_boolean(jo_val);
	258	log_debug("\tcreate-only: %s",
	259	bpc->bpc_createonly ? "true" : "false");
	260	} else if (strcmp(key, "shutdown") == 0) {
	261	bpc->bpc_shutdown = json_object_get_boolean(jo_val);
	262	log_debug("\tshutdown: %s",
	263	bpc->bpc_shutdown ? "true" : "false");
	264	} else if (strcmp(key, "echo-mode") == 0) {
	265	bpc->bpc_echo = json_object_get_boolean(jo_val);
	266	log_debug("\techo-mode: %s",
	267	bpc->bpc_echo ? "true" : "false");
	268	} else if (strcmp(key, "label") == 0) {
	269	bpc->bpc_has_label = true;
	270	sval = json_object_get_string(jo_val);
	271	if (strlcpy(bpc->bpc_label, sval,
	272	sizeof(bpc->bpc_label))
	273	> sizeof(bpc->bpc_label)) {
	274	log_debug("\tlabel: %s (truncated)", sval);
	275	error++;
	276	} else {
	277	log_debug("\tlabel: %s", sval);
	278	}
	279	} else {
	280	sval = json_object_get_string(jo_val);
	281	log_warning("%s:%d invalid configuration: '%s: %s'",
	282	__func__, __LINE__, key, sval);
	283	error++;
	284	}
	285	}
	286
	287	if (bpc->bpc_peer.sa_sin.sin_family == 0) {
	288	log_debug("%s:%d no peer address provided", __func__, __LINE__);
	289	error++;
	290	}
	291
	292	return error;
	293	}
	294
	295	static int parse_peer_label_config(struct json_object *jo,
	296	struct bfd_peer_cfg *bpc)
	297	{
	298	struct peer_label *pl;
	299	struct json_object *label;
	300	const char *sval;
	301
	302	/* Get label and translate it to BFD daemon key. */
	303	if (!json_object_object_get_ex(jo, "label", &label))
304	return 1;
305
306	sval = json_object_get_string(label);
307
308	pl = pl_find(sval);
309	if (pl == NULL)
310	return 1;
311
312	log_debug("\tpeer-label: %s", sval);
313
314	/* Translate the label into BFD address keys. */
79b4a6fc	315	bs_to_bpc(pl->pl_bs, bpc);
e9e2c950 RZ	316
	317	return 0;
	318	}
	319
	320
	321	/*
	322	* Control socket JSON parsing.
	323	*/
	324	int config_request_add(const char *jsonstr)
	325	{
	326	struct json_object *jo;
	327
	328	jo = json_tokener_parse(jsonstr);
	329	if (jo == NULL)
	330	return -1;
	331
	332	return parse_config_json(jo, config_add, NULL);
	333	}
	334
	335	int config_request_del(const char *jsonstr)
	336	{
	337	struct json_object *jo;
	338
	339	jo = json_tokener_parse(jsonstr);
	340	if (jo == NULL)
	341	return -1;
	342
	343	return parse_config_json(jo, config_del, NULL);
	344	}
	345
	346	char config_response(const char status, const char *error)
	347	{
	348	struct json_object resp, jo;
	349	char *jsonstr;
	350
	351	resp = json_object_new_object();
	352	if (resp == NULL)
	353	return NULL;
	354
	355	/* Add 'status' response key. */
	356	jo = json_object_new_string(status);
	357	if (jo == NULL) {
	358	json_object_put(resp);
	359	return NULL;
	360	}
	361
	362	json_object_object_add(resp, "status", jo);
	363
	364	/* Add 'error' response key. */
	365	if (error != NULL) {
	366	jo = json_object_new_string(error);
	367	if (jo == NULL) {
	368	json_object_put(resp);
	369	return NULL;
	370	}
	371
	372	json_object_object_add(resp, "error", jo);
	373	}
	374
	375	/* Generate JSON response. */
	376	jsonstr = XSTRDUP(
	377	MTYPE_BFDD_NOTIFICATION,
	378	json_object_to_json_string_ext(resp, BFDD_JSON_CONV_OPTIONS));
	379	json_object_put(resp);
380
381	return jsonstr;
382	}
383
384	char config_notify(struct bfd_session bs)
385	{
386	struct json_object *resp;
387	char *jsonstr;
388	time_t now;
389
390	resp = json_object_new_object();
391	if (resp == NULL)
392	return NULL;
393
394	json_object_string_add(resp, "op", BCM_NOTIFY_PEER_STATUS);
395
396	json_object_add_peer(resp, bs);
397
398	/* Add status information */
399	json_object_int_add(resp, "id", bs->discrs.my_discr);
400	json_object_int_add(resp, "remote-id", bs->discrs.my_discr);
401
402	switch (bs->ses_state) {
403	case PTM_BFD_UP:
404	json_object_string_add(resp, "state", "up");
405
406	now = monotime(NULL);
407	json_object_int_add(resp, "uptime", now - bs->uptime.tv_sec);
408	break;
409	case PTM_BFD_ADM_DOWN:
410	json_object_string_add(resp, "state", "adm-down");
411	break;
412	case PTM_BFD_DOWN:
413	json_object_string_add(resp, "state", "down");
414
415	now = monotime(NULL);
416	json_object_int_add(resp, "downtime",
417	now - bs->downtime.tv_sec);
418	break;
419	case PTM_BFD_INIT:
420	json_object_string_add(resp, "state", "init");
421	break;
422
423	default:
424	json_object_string_add(resp, "state", "unknown");
425	break;
426	}
427
428	json_object_int_add(resp, "diagnostics", bs->local_diag);
429	json_object_int_add(resp, "remote-diagnostics", bs->remote_diag);
430
431	/* Generate JSON response. */
432	jsonstr = XSTRDUP(
433	MTYPE_BFDD_NOTIFICATION,
434	json_object_to_json_string_ext(resp, BFDD_JSON_CONV_OPTIONS));
435	json_object_put(resp);
436
437	return jsonstr;
438	}
439
440	char config_notify_config(const char op, struct bfd_session *bs)
441	{
442	struct json_object *resp;
443	char *jsonstr;
444
445	resp = json_object_new_object();
446	if (resp == NULL)
447	return NULL;
448
449	json_object_string_add(resp, "op", op);
450
451	json_object_add_peer(resp, bs);
452
453	/* On peer deletion we don't need to add any additional information. */
454	if (strcmp(op, BCM_NOTIFY_CONFIG_DELETE) == 0)
455	goto skip_config;
456
457	json_object_int_add(resp, "detect-multiplier", bs->detect_mult);
458	json_object_int_add(resp, "receive-interval",
459	bs->timers.required_min_rx / 1000);
f43b9368 RZ	460	json_object_int_add(resp, "transmit-interval",
f43b9368 RZ	461	bs->timers.desired_min_tx / 1000);
e9e2c950 RZ	462	json_object_int_add(resp, "echo-interval",
	463	bs->timers.required_min_echo / 1000);
	464
	465	json_object_int_add(resp, "remote-detect-multiplier",
	466	bs->remote_detect_mult);
	467	json_object_int_add(resp, "remote-receive-interval",
	468	bs->remote_timers.required_min_rx / 1000);
	469	json_object_int_add(resp, "remote-transmit-interval",
	470	bs->remote_timers.desired_min_tx / 1000);
	471	json_object_int_add(resp, "remote-echo-interval",
	472	bs->remote_timers.required_min_echo / 1000);
	473
	474	if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_ECHO))
	475	json_object_boolean_true_add(resp, "echo-mode");
	476	else
	477	json_object_boolean_false_add(resp, "echo-mode");
	478
	479	if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_SHUTDOWN))
	480	json_object_boolean_true_add(resp, "shutdown");
	481	else
	482	json_object_boolean_false_add(resp, "shutdown");
	483
	484	skip_config:
	485	/* Generate JSON response. */
	486	jsonstr = XSTRDUP(
	487	MTYPE_BFDD_NOTIFICATION,
	488	json_object_to_json_string_ext(resp, BFDD_JSON_CONV_OPTIONS));
	489	json_object_put(resp);
	490
	491	return jsonstr;
	492	}
	493
	494	int config_notify_request(struct bfd_control_socket bcs, const char jsonstr,
	495	bpc_handle bh)
	496	{
	497	struct json_object *jo;
	498
	499	jo = json_tokener_parse(jsonstr);
	500	if (jo == NULL)
	501	return -1;
	502
	503	return parse_config_json(jo, bh, bcs);
	504	}
	505
	506	static int json_object_add_peer(struct json_object jo, struct bfd_session bs)
	507	{
79b4a6fc RZ	508	char addr_buf[INET6_ADDRSTRLEN];
79b4a6fc RZ	509
e9e2c950 RZ	510	/* Add peer 'key' information. */
	511	if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_IPV6))
	512	json_object_boolean_true_add(jo, "ipv6");
	513	else
	514	json_object_boolean_false_add(jo, "ipv6");
	515
	516	if (BFD_CHECK_FLAG(bs->flags, BFD_SESS_FLAG_MH)) {
	517	json_object_boolean_true_add(jo, "multihop");
	518	json_object_string_add(jo, "peer-address",
79b4a6fc RZ	519	inet_ntop(bs->key.family, &bs->key.peer,
79b4a6fc RZ	520	addr_buf, sizeof(addr_buf)));
e9e2c950	521	json_object_string_add(jo, "local-address",
79b4a6fc RZ	522	inet_ntop(bs->key.family, &bs->key.local,
	523	addr_buf, sizeof(addr_buf)));
	524	if (bs->key.vrfname[0])
	525	json_object_string_add(jo, "vrf-name", bs->key.vrfname);
e9e2c950 RZ	526	} else {
	527	json_object_boolean_false_add(jo, "multihop");
	528	json_object_string_add(jo, "peer-address",
79b4a6fc RZ	529	inet_ntop(bs->key.family, &bs->key.peer,
	530	addr_buf, sizeof(addr_buf)));
	531	if (memcmp(&bs->key.local, &zero_addr, sizeof(bs->key.local)))
	532	json_object_string_add(
	533	jo, "local-address",
	534	inet_ntop(bs->key.family, &bs->key.local,
	535	addr_buf, sizeof(addr_buf)));
	536	if (bs->key.ifname[0])
e9e2c950	537	json_object_string_add(jo, "local-interface",
79b4a6fc	538	bs->key.ifname);
e9e2c950 RZ	539	}
	540
	541	if (bs->pl)
	542	json_object_string_add(jo, "label", bs->pl->pl_label);
	543
	544	return 0;
	545	}
	546
	547
	548	/*
	549	* Label handling
	550	*/
	551	struct peer_label pl_find(const char label)
	552	{
	553	struct peer_label *pl;
	554
	555	TAILQ_FOREACH (pl, &bglobal.bg_pllist, pl_entry) {
	556	if (strcmp(pl->pl_label, label) != 0)
	557	continue;
	558
	559	return pl;
	560	}
	561
	562	return NULL;
	563	}
	564
	565	struct peer_label pl_new(const char label, struct bfd_session *bs)
	566	{
	567	struct peer_label *pl;
	568
	569	pl = XCALLOC(MTYPE_BFDD_LABEL, sizeof(*pl));
e9e2c950 RZ	570
	571	if (strlcpy(pl->pl_label, label, sizeof(pl->pl_label))
	572	> sizeof(pl->pl_label))
	573	log_warning("%s:%d: label was truncated", __func__, __LINE__);
	574
	575	pl->pl_bs = bs;
	576	bs->pl = pl;
	577
	578	TAILQ_INSERT_HEAD(&bglobal.bg_pllist, pl, pl_entry);
	579
	580	return pl;
	581	}
	582
	583	void pl_free(struct peer_label *pl)
	584	{
	585	if (pl == NULL)
	586	return;
	587
	588	/* Remove the pointer back. */
	589	pl->pl_bs->pl = NULL;
	590
	591	TAILQ_REMOVE(&bglobal.bg_pllist, pl, pl_entry);
	592	XFREE(MTYPE_BFDD_LABEL, pl);
	593	}