summaryrefslogtreecommitdiff
path: root/src/libsystemd-network/lldp-internal.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/libsystemd-network/lldp-internal.c')
-rw-r--r--src/libsystemd-network/lldp-internal.c360
1 files changed, 0 insertions, 360 deletions
diff --git a/src/libsystemd-network/lldp-internal.c b/src/libsystemd-network/lldp-internal.c
deleted file mode 100644
index c8740ce5f0..0000000000
--- a/src/libsystemd-network/lldp-internal.c
+++ /dev/null
@@ -1,360 +0,0 @@
-/***
- This file is part of systemd.
-
- Copyright (C) 2014 Tom Gundersen
- Copyright (C) 2014 Susant Sahani
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include "sd-lldp.h"
-
-#include "alloc-util.h"
-#include "lldp-internal.h"
-
-/* We store maximum 1K chassis entries */
-#define LLDP_MIB_MAX_CHASSIS 1024
-
-/* Maximum Ports can be attached to any chassis */
-#define LLDP_MIB_MAX_PORT_PER_CHASSIS 32
-
-/* 10.5.5.2.2 mibUpdateObjects ()
- * The mibUpdateObjects () procedure updates the MIB objects corresponding to
- * the TLVs contained in the received LLDPDU for the LLDP remote system
- * indicated by the LLDP remote systems update process defined in 10.3.5 */
-
-int lldp_mib_update_objects(lldp_chassis *c, tlv_packet *tlv) {
- lldp_neighbour_port *p;
- uint16_t length, ttl;
- uint8_t *data;
- uint8_t type;
- int r;
-
- assert_return(c, -EINVAL);
- assert_return(tlv, -EINVAL);
-
- r = sd_lldp_packet_read_port_id(tlv, &type, &data, &length);
- if (r < 0)
- return r;
-
- /* Update the packet if we already have */
- LIST_FOREACH(port, p, c->ports) {
-
- if ((p->type == type && p->length == length && !memcmp(p->data, data, p->length))) {
-
- r = sd_lldp_packet_read_ttl(tlv, &ttl);
- if (r < 0)
- return r;
-
- p->until = ttl * USEC_PER_SEC + now(clock_boottime_or_monotonic());
-
- sd_lldp_packet_unref(p->packet);
- p->packet = tlv;
-
- prioq_reshuffle(p->c->by_expiry, p, &p->prioq_idx);
-
- return 0;
- }
- }
-
- return -1;
-}
-
-int lldp_mib_remove_objects(lldp_chassis *c, tlv_packet *tlv) {
- lldp_neighbour_port *p, *q;
- uint8_t *data;
- uint16_t length;
- uint8_t type;
- int r;
-
- assert_return(c, -EINVAL);
- assert_return(tlv, -EINVAL);
-
- r = sd_lldp_packet_read_port_id(tlv, &type, &data, &length);
- if (r < 0)
- return r;
-
- LIST_FOREACH_SAFE(port, p, q, c->ports) {
-
- /* Find the port */
- if (p->type == type && p->length == length && !memcmp(p->data, data, p->length)) {
- lldp_neighbour_port_remove_and_free(p);
- break;
- }
- }
-
- return 0;
-}
-
-int lldp_mib_add_objects(Prioq *by_expiry,
- Hashmap *neighbour_mib,
- tlv_packet *tlv) {
- _cleanup_lldp_neighbour_port_free_ lldp_neighbour_port *p = NULL;
- _cleanup_lldp_chassis_free_ lldp_chassis *c = NULL;
- lldp_chassis_id chassis_id;
- bool new_chassis = false;
- uint8_t subtype, *data;
- uint16_t ttl, length;
- int r;
-
- assert_return(by_expiry, -EINVAL);
- assert_return(neighbour_mib, -EINVAL);
- assert_return(tlv, -EINVAL);
-
- r = sd_lldp_packet_read_chassis_id(tlv, &subtype, &data, &length);
- if (r < 0)
- goto drop;
-
- r = sd_lldp_packet_read_ttl(tlv, &ttl);
- if (r < 0)
- goto drop;
-
- /* Make hash key */
- chassis_id.type = subtype;
- chassis_id.length = length;
- chassis_id.data = data;
-
- /* Try to find the Chassis */
- c = hashmap_get(neighbour_mib, &chassis_id);
- if (!c) {
-
- /* Don't create chassis if ttl 0 is received . Silently drop it */
- if (ttl == 0) {
- log_lldp("TTL value 0 received. Skiping Chassis creation.");
- goto drop;
- }
-
- /* Admission Control: Can we store this packet ? */
- if (hashmap_size(neighbour_mib) >= LLDP_MIB_MAX_CHASSIS) {
-
- log_lldp("Exceeding number of chassie: %d. Dropping ...",
- hashmap_size(neighbour_mib));
- goto drop;
- }
-
- r = lldp_chassis_new(tlv, by_expiry, neighbour_mib, &c);
- if (r < 0)
- goto drop;
-
- new_chassis = true;
-
- r = hashmap_put(neighbour_mib, &c->chassis_id, c);
- if (r < 0)
- goto drop;
-
- } else {
-
- /* When the TTL field is set to zero, the receiving LLDP agent is notified all
- * system information associated with the LLDP agent/port is to be deleted */
- if (ttl == 0) {
- log_lldp("TTL value 0 received . Deleting associated Port ...");
-
- lldp_mib_remove_objects(c, tlv);
-
- c = NULL;
- goto drop;
- }
-
- /* if we already have this port just update it */
- r = lldp_mib_update_objects(c, tlv);
- if (r >= 0) {
- c = NULL;
- return r;
- }
-
- /* Admission Control: Can this port attached to the existing chassis ? */
- if (c->n_ref >= LLDP_MIB_MAX_PORT_PER_CHASSIS) {
- log_lldp("Port limit reached. Chassis has: %d ports. Dropping ...", c->n_ref);
-
- c = NULL;
- goto drop;
- }
- }
-
- /* This is a new port */
- r = lldp_neighbour_port_new(c, tlv, &p);
- if (r < 0)
- goto drop;
-
- r = prioq_put(c->by_expiry, p, &p->prioq_idx);
- if (r < 0)
- goto drop;
-
- /* Attach new port to chassis */
- LIST_PREPEND(port, c->ports, p);
- c->n_ref ++;
-
- p = NULL;
- c = NULL;
-
- return 0;
-
- drop:
- sd_lldp_packet_unref(tlv);
-
- if (new_chassis)
- hashmap_remove(neighbour_mib, &c->chassis_id);
-
- return r;
-}
-
-void lldp_neighbour_port_remove_and_free(lldp_neighbour_port *p) {
- lldp_chassis *c;
-
- assert(p);
- assert(p->c);
-
- c = p->c;
-
- prioq_remove(c->by_expiry, p, &p->prioq_idx);
-
- LIST_REMOVE(port, c->ports, p);
- lldp_neighbour_port_free(p);
-
- /* Drop the Chassis if no port is attached */
- c->n_ref --;
- if (c->n_ref <= 1) {
- hashmap_remove(c->neighbour_mib, &c->chassis_id);
- lldp_chassis_free(c);
- }
-}
-
-void lldp_neighbour_port_free(lldp_neighbour_port *p) {
-
- if(!p)
- return;
-
- sd_lldp_packet_unref(p->packet);
-
- free(p->data);
- free(p);
-}
-
-int lldp_neighbour_port_new(lldp_chassis *c,
- tlv_packet *tlv,
- lldp_neighbour_port **ret) {
- _cleanup_lldp_neighbour_port_free_ lldp_neighbour_port *p = NULL;
- uint16_t length, ttl;
- uint8_t *data;
- uint8_t type;
- int r;
-
- assert(tlv);
-
- r = sd_lldp_packet_read_port_id(tlv, &type, &data, &length);
- if (r < 0)
- return r;
-
- r = sd_lldp_packet_read_ttl(tlv, &ttl);
- if (r < 0)
- return r;
-
- p = new0(lldp_neighbour_port, 1);
- if (!p)
- return -ENOMEM;
-
- p->c = c;
- p->type = type;
- p->length = length;
- p->packet = tlv;
- p->prioq_idx = PRIOQ_IDX_NULL;
- p->until = ttl * USEC_PER_SEC + now(clock_boottime_or_monotonic());
-
- p->data = memdup(data, length);
- if (!p->data)
- return -ENOMEM;
-
- *ret = p;
- p = NULL;
-
- return 0;
-}
-
-void lldp_chassis_free(lldp_chassis *c) {
-
- if (!c)
- return;
-
- if (c->n_ref > 1)
- return;
-
- free(c->chassis_id.data);
- free(c);
-}
-
-int lldp_chassis_new(tlv_packet *tlv,
- Prioq *by_expiry,
- Hashmap *neighbour_mib,
- lldp_chassis **ret) {
- _cleanup_lldp_chassis_free_ lldp_chassis *c = NULL;
- uint16_t length;
- uint8_t *data;
- uint8_t type;
- int r;
-
- assert(tlv);
-
- r = sd_lldp_packet_read_chassis_id(tlv, &type, &data, &length);
- if (r < 0)
- return r;
-
- c = new0(lldp_chassis, 1);
- if (!c)
- return -ENOMEM;
-
- c->n_ref = 1;
- c->chassis_id.type = type;
- c->chassis_id.length = length;
-
- c->chassis_id.data = memdup(data, length);
- if (!c->chassis_id.data)
- return -ENOMEM;
-
- LIST_HEAD_INIT(c->ports);
-
- c->by_expiry = by_expiry;
- c->neighbour_mib = neighbour_mib;
-
- *ret = c;
- c = NULL;
-
- return 0;
-}
-
-int lldp_receive_packet(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
- _cleanup_(sd_lldp_packet_unrefp) tlv_packet *packet = NULL;
- tlv_packet *p;
- uint16_t length;
- int r;
-
- assert(fd);
- assert(userdata);
-
- r = tlv_packet_new(&packet);
- if (r < 0)
- return r;
-
- length = read(fd, &packet->pdu, sizeof(packet->pdu));
-
- /* Silently drop the packet */
- if ((size_t) length > ETHER_MAX_LEN)
- return 0;
-
- packet->userdata = userdata;
-
- p = packet;
- packet = NULL;
-
- return lldp_handle_packet(p, (uint16_t) length);
-}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-14 12:56:48 +0000