src/libsystemd-network/dhcp6-network.c \
src/libsystemd-network/dhcp6-option.c \
src/libsystemd-network/dhcp6-lease-internal.h \
- src/libsystemd-network/sd-dhcp6-lease.c
+ src/libsystemd-network/sd-dhcp6-lease.c \
+ src/libsystemd-network/lldp.h \
+ src/libsystemd-network/lldp-tlv.h \
+ src/libsystemd-network/lldp-tlv.c \
+ src/libsystemd-network/lldp-network.h \
+ src/libsystemd-network/lldp-network.c \
+ src/libsystemd-network/lldp-port.h \
+ src/libsystemd-network/lldp-port.c \
+ src/libsystemd-network/lldp-internal.h \
+ src/libsystemd-network/lldp-internal.c \
+ src/libsystemd-network/sd-lldp.h \
+ src/libsystemd-network/sd-lldp.c
libsystemd_network_la_LIBADD = \
libudev-internal.la \
libsystemd-internal.la \
libsystemd-shared.la
+test_lldp_SOURCES = \
+ src/libsystemd-network/lldp.h \
+ src/libsystemd-network/lldp-tlv.h \
+ src/libsystemd-network/lldp-tlv.c \
+ src/libsystemd-network/test-lldp.c
+
+test_lldp_LDADD = \
+ libsystemd-network.la \
+ libsystemd-internal.la \
+ libsystemd-shared.la
+
tests += \
test-dhcp-option \
test-dhcp-client \
test-dhcp-server \
test-ipv4ll \
test-icmp6-rs \
- test-dhcp6-client
+ test-dhcp6-client \
+ test-lldp
manual_tests += \
test-pppoe
--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ 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 "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
+
+int lldp_read_chassis_id(tlv_packet *tlv,
+ uint8_t *type,
+ uint16_t *length,
+ uint8_t **data) {
+ uint8_t subtype;
+ int r;
+
+ assert_return(tlv, -EINVAL);
+
+ r = lldp_tlv_packet_enter_container(tlv, LLDP_TYPE_CHASSIS_ID);
+ if (r < 0)
+ goto out2;
+
+ r = tlv_packet_read_u8(tlv, &subtype);
+ if (r < 0)
+ goto out1;
+
+ switch (subtype) {
+ case LLDP_CHASSIS_SUBTYPE_MAC_ADDRESS:
+
+ r = tlv_packet_read_bytes(tlv, data, length);
+ if (r < 0)
+ goto out1;
+
+ break;
+ default:
+ r = -ENOTSUP;
+ break;
+ }
+
+ *type = subtype;
+
+ out1:
+ (void)lldp_tlv_packet_exit_container(tlv);
+
+ out2:
+ return r;
+}
+
+int lldp_read_port_id(tlv_packet *tlv,
+ uint8_t *type,
+ uint16_t *length,
+ uint8_t **data) {
+ uint8_t subtype;
+ char *s;
+ int r;
+
+ assert_return(tlv, -EINVAL);
+
+ r = lldp_tlv_packet_enter_container(tlv, LLDP_TYPE_PORT_ID);
+ if (r < 0)
+ goto out2;
+
+ r = tlv_packet_read_u8(tlv, &subtype);
+ if (r < 0)
+ goto out1;
+
+ switch (subtype) {
+ case LLDP_PORT_SUBTYPE_INTERFACE_NAME:
+
+ r = tlv_packet_read_string(tlv, &s, length);
+ if (r < 0)
+ goto out1;
+
+ *data = (uint8_t *) s;
+
+ break;
+ case LLDP_PORT_SUBTYPE_MAC_ADDRESS:
+
+ r = tlv_packet_read_bytes(tlv, data, length);
+ if (r < 0)
+ goto out1;
+
+ break;
+ default:
+ r = -ENOTSUP;
+ break;
+ }
+
+ *type = subtype;
+
+ out1:
+ (void)lldp_tlv_packet_exit_container(tlv);
+
+ out2:
+ return r;
+}
+
+int lldp_read_ttl(tlv_packet *tlv, uint16_t *ttl) {
+ int r;
+
+ assert_return(tlv, -EINVAL);
+
+ r = lldp_tlv_packet_enter_container(tlv, LLDP_TYPE_TTL);
+ if (r < 0)
+ goto out;
+
+ r = tlv_packet_read_u16(tlv, ttl);
+
+ (void) lldp_tlv_packet_exit_container(tlv);
+
+ out:
+ return r;
+}
+
+/* 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 = lldp_read_port_id(tlv, &type, &length, &data);
+ 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 = lldp_read_ttl(tlv, &ttl);
+ if (r < 0)
+ return r;
+
+ p->until = ttl * USEC_PER_SEC + now(clock_boottime_or_monotonic());
+
+ tlv_packet_free(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 = lldp_read_port_id(tlv, &type, &length, &data);
+ 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 = lldp_read_chassis_id(tlv, &subtype, &length, &data);
+ if (r < 0)
+ goto drop;
+
+ r = lldp_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 (REFCNT_GET(c->n_ref) >= LLDP_MIB_MAX_PORT_PER_CHASSIS) {
+ log_lldp("Port limit reached. Chassis has: %d ports. Dropping ...",
+ REFCNT_GET(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);
+ REFCNT_INC(c->n_ref);
+
+ p = NULL;
+ c = NULL;
+
+ return 0;
+
+ drop:
+ tlv_packet_free(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 */
+ if (REFCNT_DEC(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;
+
+ tlv_packet_free(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;
+ uint16_t length, ttl;
+ uint8_t *data;
+ uint8_t type;
+ int r;
+
+ assert(tlv);
+
+ r = lldp_read_port_id(tlv, &type, &length, &data);
+ if (r < 0)
+ return r;
+
+ r = lldp_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 (REFCNT_GET(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;
+ uint16_t length;
+ uint8_t *data;
+ uint8_t type;
+ int r;
+
+ assert(tlv);
+
+ r = lldp_read_chassis_id(tlv, &type, &length, &data);
+ if (r < 0)
+ return r;
+
+ c = new0(lldp_chassis, 1);
+ if (!c)
+ return -ENOMEM;
+
+ c->n_ref = REFCNT_INIT;
+ 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;
+}
--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ 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/>.
+***/
+
+#pragma once
+
+#include "log.h"
+#include "list.h"
+#include "refcnt.h"
+#include "lldp-tlv.h"
+#include "prioq.h"
+
+typedef struct lldp_neighbour_port lldp_neighbour_port;
+typedef struct lldp_chassis lldp_chassis;
+typedef struct lldp_chassis_id lldp_chassis_id;
+
+struct lldp_neighbour_port {
+ uint8_t type;
+ uint8_t *data;
+
+ uint16_t length;
+ usec_t until;
+
+ unsigned prioq_idx;
+
+ lldp_chassis *c;
+ tlv_packet *packet;
+
+ LIST_FIELDS(lldp_neighbour_port, port);
+};
+
+int lldp_neighbour_port_new(lldp_chassis *c, tlv_packet *tlv, lldp_neighbour_port **ret);
+void lldp_neighbour_port_free(lldp_neighbour_port *p);
+void lldp_neighbour_port_remove_and_free(lldp_neighbour_port *p);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(lldp_neighbour_port *, lldp_neighbour_port_free);
+#define _cleanup_lldp_neighbour_port_free_ _cleanup_(lldp_neighbour_port_freep)
+
+struct lldp_chassis_id {
+ uint8_t type;
+ uint16_t length;
+
+ uint8_t *data;
+};
+
+struct lldp_chassis {
+ RefCount n_ref;
+
+ lldp_chassis_id chassis_id;
+
+ Prioq *by_expiry;
+ Hashmap *neighbour_mib;
+
+ LIST_HEAD(lldp_neighbour_port, ports);
+};
+
+int lldp_chassis_new(tlv_packet *tlv,
+ Prioq *by_expiry,
+ Hashmap *neighbour_mib,
+ lldp_chassis **ret);
+
+void lldp_chassis_free(lldp_chassis *c);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(lldp_chassis *, lldp_chassis_free);
+#define _cleanup_lldp_chassis_free_ _cleanup_(lldp_chassis_freep)
+
+int lldp_mib_update_objects(lldp_chassis *c, tlv_packet *tlv);
+int lldp_mib_add_objects(Prioq *by_expiry, Hashmap *neighbour_mib, tlv_packet *tlv);
+int lldp_mib_remove_objects(lldp_chassis *c, tlv_packet *tlv);
+
+int lldp_read_chassis_id(tlv_packet *tlv, uint8_t *type, uint16_t *length, uint8_t **data);
+int lldp_read_port_id(tlv_packet *tlv, uint8_t *type, uint16_t *length, uint8_t **data);
+int lldp_read_ttl(tlv_packet *tlv, uint16_t *ttl);
+
+#define log_lldp(fmt, ...) log_internal(LOG_DEBUG, 0, __FILE__, __LINE__, __func__, "LLDP: " fmt, ##__VA_ARGS__)
--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ 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 <linux/filter.h>
+#include <linux/if_ether.h>
+
+#include "socket-util.h"
+#include "lldp-tlv.h"
+#include "lldp-network.h"
+#include "sd-lldp.h"
+
+int lldp_network_bind_raw_socket(int ifindex) {
+ typedef struct LLDPFrame {
+ struct ethhdr hdr;
+ uint8_t tlvs[0];
+ } LLDPFrame;
+
+ struct sock_filter filter[] = {
+ BPF_STMT(BPF_LD + BPF_W + BPF_ABS, offsetof(LLDPFrame, hdr.h_dest)), /* A <- 4 bytes of destination MAC */
+ BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, 0x0180c200, 1, 0), /* A != 01:80:c2:00 */
+ BPF_STMT(BPF_RET + BPF_K, 0), /* drop packet */
+ BPF_STMT(BPF_LD + BPF_H + BPF_ABS, offsetof(LLDPFrame, hdr.h_dest) + 4), /* A <- remaining 2 bytes of destination MAC */
+ BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, 0x0000, 3, 0), /* A != 00:00 */
+ BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, 0x0003, 2, 0), /* A != 00:03 */
+ BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, 0x000e, 1, 0), /* A != 00:0e */
+ BPF_STMT(BPF_RET + BPF_K, 0), /* drop packet */
+ BPF_STMT(BPF_LD + BPF_H + BPF_ABS, offsetof(LLDPFrame, hdr.h_proto)), /* A <- protocol */
+ BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, ETHERTYPE_LLDP, 1, 0), /* A != ETHERTYPE_LLDP */
+ BPF_STMT(BPF_RET + BPF_K, 0), /* drop packet */
+ BPF_STMT(BPF_RET + BPF_K, (uint32_t) -1), /* accept packet */
+ };
+
+ struct sock_fprog fprog = {
+ .len = ELEMENTSOF(filter),
+ .filter = filter
+ };
+
+ _cleanup_close_ int s = -1;
+
+ union sockaddr_union saddrll = {
+ .ll.sll_family = AF_PACKET,
+ .ll.sll_ifindex = ifindex,
+ };
+
+ int r;
+
+ assert(ifindex > 0);
+
+ s = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
+ if (s < 0)
+ return -errno;
+
+ r = setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER, &fprog, sizeof(fprog));
+ if (r < 0)
+ return -errno;
+
+ r = bind(s, &saddrll.sa, sizeof(saddrll.ll));
+ if (r < 0)
+ return -errno;
+
+ r = s;
+ s = -1;
+
+ return r;
+}
+
+int lldp_receive_packet(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
+ _cleanup_tlv_packet_free_ 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);
+}
--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ 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/>.
+***/
+
+#pragma once
+
+#include "sd-event.h"
+
+int lldp_network_bind_raw_socket(int ifindex);
+int lldp_receive_packet(sd_event_source *s, int fd, uint32_t revents, void *userdata);
--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ 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 "async.h"
+#include "lldp-port.h"
+#include "lldp-network.h"
+
+int lldp_port_start(lldp_port *p) {
+ int r;
+
+ assert_return(p, -EINVAL);
+
+ r = lldp_network_bind_raw_socket(p->ifindex);
+ if (r < 0)
+ return r;
+
+ p->rawfd = r;
+
+ r = sd_event_add_io(p->event, &p->lldp_port_rx,
+ p->rawfd, EPOLLIN, lldp_receive_packet, p);
+ if (r < 0) {
+ log_debug("Failed to allocate event source: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_event_source_set_priority(p->lldp_port_rx, p->event_priority);
+ if (r < 0) {
+ log_debug("Failed to set event priority: %s", strerror(-r));
+ goto fail;
+ }
+
+ r = sd_event_source_set_description(p->lldp_port_rx, "lldp-port-rx");
+ if (r < 0) {
+ log_debug("Failed to set event name: %s", strerror(-r));
+ goto fail;
+ }
+
+ return 0;
+
+fail:
+ lldp_port_stop(p);
+
+ return r;
+}
+
+int lldp_port_stop(lldp_port *p) {
+
+ assert_return(p, -EINVAL);
+
+ p->rawfd = asynchronous_close(p->rawfd);
+ p->lldp_port_rx = sd_event_source_unref(p->lldp_port_rx);
+
+ return 0;
+}
+
+void lldp_port_free(lldp_port *p) {
+ if (!p)
+ return;
+
+ lldp_port_stop(p);
+
+ free(p->ifname);
+ free(p);
+}
+
+int lldp_port_new(int ifindex,
+ char *ifname,
+ const struct ether_addr *addr,
+ void *userdata,
+ lldp_port **ret) {
+ _cleanup_free_ lldp_port *p = NULL;
+
+ assert_return(ifindex, -EINVAL);
+ assert_return(ifname, -EINVAL);
+ assert_return(addr, -EINVAL);
+
+ p = new0(lldp_port, 1);
+ if (!p)
+ return -ENOMEM;
+
+ p->rawfd = -1;
+ p->ifindex = ifindex;
+
+ p->ifname = strdup(ifname);
+ if (!p->ifname)
+ return -ENOMEM;
+
+ memcpy(&p->mac, addr, ETH_ALEN);
+
+ p->userdata = userdata;
+
+ *ret = p;
+
+ p = NULL;
+
+ return 0;
+}
--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ 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/>.
+***/
+
+#pragma once
+
+#include <net/ethernet.h>
+
+#include "sd-event.h"
+#include "sd-lldp.h"
+
+typedef struct lldp_port lldp_port;
+
+struct lldp_port {
+ LLDPPortStatus status;
+
+ int ifindex;
+ char *ifname;
+
+ struct ether_addr mac;
+
+ int rawfd;
+
+ sd_event *event;
+ sd_event_source *lldp_port_rx;
+
+ int event_priority;
+
+ void *userdata;
+};
+
+int lldp_port_new(int ifindex,
+ char *ifname,
+ const struct ether_addr *addr,
+ void *userdata,
+ lldp_port **ret);
+void lldp_port_free(lldp_port *p);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(lldp_port*, lldp_port_free);
+#define _cleanup_lldp_port_free_ _cleanup_(lldp_port_freep)
+
+int lldp_port_start(lldp_port *p);
+int lldp_port_stop(lldp_port *p);
--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ 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 <net/ethernet.h>
+#include <arpa/inet.h>
+
+#include "macro.h"
+#include "lldp-tlv.h"
+
+int tlv_section_new(tlv_section **ret) {
+ tlv_section *s;
+
+ s = new0(tlv_section, 1);
+ if (!s)
+ return -ENOMEM;
+
+ *ret = s;
+
+ return 0;
+}
+
+void tlv_section_free(tlv_section *m) {
+
+ if (!m)
+ return;
+
+ free(m);
+}
+
+int tlv_packet_new(tlv_packet **ret) {
+ tlv_packet *m;
+
+ m = new0(tlv_packet, 1);
+ if (!m)
+ return -ENOMEM;
+
+ LIST_HEAD_INIT(m->sections);
+
+ *ret = m;
+
+ return 0;
+}
+
+void tlv_packet_free(tlv_packet *m) {
+ tlv_section *s, *n;
+
+ if (!m)
+ return;
+
+ LIST_FOREACH_SAFE(section, s, n, m->sections)
+ tlv_section_free(s);
+
+ free(m);
+}
+
+int tlv_packet_append_bytes(tlv_packet *m, const void *data, size_t data_length) {
+ uint8_t *p;
+
+ assert_return(m, -EINVAL);
+ assert_return(data, -EINVAL);
+ assert_return(data_length, -EINVAL);
+
+ if (m->length + data_length > ETHER_MAX_LEN)
+ return -ENOMEM;
+
+ p = m->pdu + m->length;
+ memcpy(p, data, data_length);
+ m->length += data_length;
+
+ return 0;
+}
+
+int tlv_packet_append_u8(tlv_packet *m, uint8_t data) {
+
+ assert_return(m, -EINVAL);
+
+ return tlv_packet_append_bytes(m, &data, sizeof(uint8_t));
+}
+
+int tlv_packet_append_u16(tlv_packet *m, uint16_t data) {
+ uint16_t type;
+
+ assert_return(m, -EINVAL);
+
+ type = htons(data);
+
+ return tlv_packet_append_bytes(m, &type, sizeof(uint16_t));
+}
+
+int tlv_packet_append_u32(tlv_packet *m, uint32_t data) {
+ uint32_t type;
+
+ assert_return(m, -EINVAL);
+
+ type = htonl(data);
+
+ return tlv_packet_append_bytes(m, &type, sizeof(uint32_t));
+}
+
+int tlv_packet_append_string(tlv_packet *m, char *data, uint16_t size) {
+
+ assert_return(m, -EINVAL);
+
+ return tlv_packet_append_bytes(m, data, size);
+}
+
+int lldp_tlv_packet_open_container(tlv_packet *m, uint16_t type) {
+
+ assert_return(m, -EINVAL);
+
+ m->container_pos = m->pdu + m->length;
+
+ return tlv_packet_append_u16(m, type << 9);
+}
+
+int lldp_tlv_packet_close_container(tlv_packet *m) {
+ uint16_t type;
+
+ assert_return(m, -EINVAL);
+ assert_return(m->container_pos, -EINVAL);
+
+ memcpy(&type, m->container_pos, sizeof(uint16_t));
+
+ type |= htons(((m->pdu + m->length) - (m->container_pos + 2)) & 0x01ff);
+ memcpy(m->container_pos, &type, sizeof(uint16_t));
+
+ return 0;
+}
+
+static inline int tlv_packet_read_internal(tlv_section *m, void **data) {
+
+ assert_return(m->read_pos, -EINVAL);
+
+ *data = m->read_pos;
+
+ return 0;
+}
+
+int tlv_packet_read_u8(tlv_packet *m, uint8_t *data) {
+ void *val;
+ int r;
+
+ assert_return(m, -EINVAL);
+
+ r = tlv_packet_read_internal(m->container, &val);
+ if (r < 0)
+ return r;
+
+ memcpy(data, val, sizeof(uint8_t));
+
+ m->container->read_pos ++;
+
+ return 0;
+}
+
+int tlv_packet_read_u16(tlv_packet *m, uint16_t *data) {
+ uint16_t t;
+ void *val;
+ int r;
+
+ assert_return(m, -EINVAL);
+
+ r = tlv_packet_read_internal(m->container, &val);
+ if (r < 0)
+ return r;
+
+ memcpy(&t, val, sizeof(uint16_t));
+ *data = ntohs(t);
+
+ m->container->read_pos += 2;
+
+ return 0;
+}
+
+int tlv_packet_read_u32(tlv_packet *m, uint32_t *data) {
+ uint32_t t;
+ void *val;
+ int r;
+
+ assert_return(m, -EINVAL);
+
+ r = tlv_packet_read_internal(m->container, &val);
+ if (r < 0)
+ return r;
+
+ memcpy(&t, val, sizeof(uint32_t));
+ *data = ntohl(t);
+
+ m->container->read_pos += 4;
+
+ return r;
+}
+
+int tlv_packet_read_string(tlv_packet *m, char **data, uint16_t *data_length) {
+ void *val;
+ int r;
+
+ assert_return(m, -EINVAL);
+
+ r = tlv_packet_read_internal(m->container, &val);
+ if (r < 0)
+ return r;
+
+ *data = (char *) val;
+ *data_length = m->container->length;
+
+ m->container->read_pos += m->container->length;
+
+ return 0;
+}
+
+int tlv_packet_read_bytes(tlv_packet *m, uint8_t **data, uint16_t *data_length) {
+ void *val;
+ int r;
+
+ assert_return(m, -EINVAL);
+
+ r = tlv_packet_read_internal(m->container, &val);
+ if (r < 0)
+ return r;
+
+ *data = (uint8_t *) val;
+ *data_length = m->container->length;
+
+ m->container->read_pos += m->container->length;
+
+ return 0;
+}
+
+/* parse raw TLV packet */
+int tlv_packet_parse_pdu(tlv_packet *m, uint16_t size) {
+ tlv_section *section, *tail;
+ uint16_t t, l;
+ uint8_t *p;
+ int r;
+
+ assert_return(m, -EINVAL);
+ assert_return(size, -EINVAL);
+
+ p = m->pdu;
+
+ /* extract ethernet herader */
+ memcpy(&m->mac, p, ETH_ALEN);
+ p += sizeof(struct ether_header);
+
+ for (l = 0; l <= size; ) {
+ r = tlv_section_new(§ion);
+ if (r < 0)
+ return r;
+
+ memcpy(&t, p, sizeof(uint16_t));
+
+ section->type = ntohs(t) >> 9;
+ section->length = ntohs(t) & 0x01ff;
+
+ if (section->type == LLDP_TYPE_END || section->type >=_LLDP_TYPE_MAX) {
+ tlv_section_free(section);
+ break;
+ }
+
+ p += 2;
+ section->data = p;
+
+ LIST_FIND_TAIL(section, m->sections, tail);
+ LIST_INSERT_AFTER(section, m->sections, tail, section);
+
+ p += section->length;
+ l += (section->length + 2);
+ }
+
+ return 0;
+}
+
+int lldp_tlv_packet_enter_container(tlv_packet *m, uint16_t type) {
+ tlv_section *s;
+
+ assert_return(m, -EINVAL);
+
+ LIST_FOREACH(section, s, m->sections)
+ if (s->type == type)
+ break;
+ if (!s)
+ return -1;
+
+ m->container = s;
+
+ m->container->read_pos = s->data;
+ if (!m->container->read_pos) {
+ m->container = 0;
+ return -1;
+ }
+
+ return 0;
+}
+
+int lldp_tlv_packet_exit_container(tlv_packet *m) {
+ assert_return(m, -EINVAL);
+
+ m->container = 0;
+
+ return 0;
+}
--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ 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/>.
+***/
+
+#pragma once
+
+#include <net/ethernet.h>
+
+#include "util.h"
+#include "lldp.h"
+#include "list.h"
+
+typedef struct tlv_packet tlv_packet;
+typedef struct tlv_section tlv_section;
+
+struct tlv_section {
+ uint16_t type;
+ uint16_t length;
+
+ uint8_t *read_pos;
+ uint8_t *data;
+
+ LIST_FIELDS(tlv_section, section);
+};
+
+int tlv_section_new(tlv_section **ret);
+void tlv_section_free(tlv_section *ret);
+
+struct tlv_packet {
+ uint16_t type;
+ uint16_t length;
+ usec_t ts;
+
+ uint8_t *container_pos;
+ uint8_t pdu[ETHER_MAX_LEN];
+
+ void *userdata;
+
+ struct ether_addr mac;
+ tlv_section *container;
+
+ LIST_HEAD(tlv_section, sections);
+};
+
+int tlv_packet_new(tlv_packet **ret);
+void tlv_packet_free(tlv_packet *m);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(tlv_packet*, tlv_packet_free);
+#define _cleanup_tlv_packet_free_ _cleanup_(tlv_packet_freep)
+
+int lldp_tlv_packet_open_container(tlv_packet *m, uint16_t type);
+int lldp_tlv_packet_close_container(tlv_packet *m);
+
+int tlv_packet_append_bytes(tlv_packet *m, const void *data, size_t data_length);
+int tlv_packet_append_u8(tlv_packet *m, uint8_t data);
+int tlv_packet_append_u16(tlv_packet *m, uint16_t data);
+int tlv_packet_append_u32(tlv_packet *m, uint32_t data);
+int tlv_packet_append_string(tlv_packet *m, char *data, uint16_t size);
+
+int lldp_tlv_packet_enter_container(tlv_packet *m, uint16_t type);
+int lldp_tlv_packet_exit_container(tlv_packet *m);
+
+int tlv_packet_read_bytes(tlv_packet *m, uint8_t **data, uint16_t *data_length);
+int tlv_packet_read_string(tlv_packet *m, char **data, uint16_t *data_length);
+int tlv_packet_read_u8(tlv_packet *m, uint8_t *data);
+int tlv_packet_read_u16(tlv_packet *m, uint16_t *data);
+int tlv_packet_read_u32(tlv_packet *m, uint32_t *data);
+
+int tlv_packet_parse_pdu(tlv_packet *t, uint16_t size);
--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ 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/>.
+***/
+
+#pragma once
+
+#define LLDP_MULTICAST_ADDR { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x0e }
+
+#define ETHERTYPE_LLDP 0x88cc
+
+/* IEEE 802.3AB Clause 9: TLV Types */
+typedef enum LLDPTypes {
+ LLDP_TYPE_END = 0,
+ LLDP_TYPE_CHASSIS_ID = 1,
+ LLDP_TYPE_PORT_ID = 2,
+ LLDP_TYPE_TTL = 3,
+ LLDP_TYPE_PORT_DESCRIPTION = 4,
+ LLDP_TYPE_SYSTEM_NAME = 5,
+ LLDP_TYPE_SYSTEM_DESCRIPTION = 6,
+ LLDP_TYPE_SYSTEM_CAPABILITIES = 7,
+ LLDP_TYPE_MGMT_ADDRESS = 8,
+ LLDP_TYPE_PRIVATE = 127,
+ _LLDP_TYPE_MAX,
+ _LLDP_TYPE_INVALID = -1,
+} LLDPTypes;
+
+/* IEEE 802.3AB Clause 9.5.2: Chassis subtypes */
+typedef enum LLDPChassisSubtypes {
+ LLDP_CHASSIS_SUBTYPE_RESERVED = 0,
+ LLDP_CHASSIS_SUBTYPE_CHASSIS_COMPONENT = 1,
+ LLDP_CHASSIS_SUBTYPE_INTERFACE_ALIAS = 2,
+ LLDP_CHASSIS_SUBTYPE_PORT_COMPONENT = 3,
+ LLDP_CHASSIS_SUBTYPE_MAC_ADDRESS = 4,
+ LLDP_CHASSIS_SUBTYPE_NETWORK_ADDRESS = 5,
+ LLDP_CHASSIS_SUBTYPE_INTERFACE_NAME = 6,
+ LLDP_CHASSIS_SUBTYPE_LOCALLY_ASSIGNED = 7,
+ _LLDP_CHASSIS_SUBTYPE_MAX,
+ _LLDP_CHASSIS_SUBTYPE_INVALID = -1,
+} LLDPChassisSubtypes;
+
+/* IEEE 802.3AB Clause 9.5.3: Port subtype */
+typedef enum LLDPPortSubtypes {
+ LLDP_PORT_SUBTYPE_RESERVED = 0,
+ LLDP_PORT_SUBTYPE_INTERFACE_ALIAS = 1,
+ LLDP_PORT_SUBTYPE_PORT_COMPONENT = 2,
+ LLDP_PORT_SUBTYPE_MAC_ADDRESS = 3,
+ LLDP_PORT_SUBTYPE_NETWORK = 4,
+ LLDP_PORT_SUBTYPE_INTERFACE_NAME = 5,
+ LLDP_PORT_SUBTYPE_AGENT_CIRCUIT_ID = 6,
+ LLDP_PORT_SUBTYPE_LOCALLY_ASSIGNED = 7,
+ _LLDP_PORT_SUBTYPE_MAX,
+ _LLDP_PORT_SUBTYPE_INVALID = -1
+} LLDPPortSubtypes;
+
+typedef enum LLDPSystemCapabilities {
+ LLDP_SYSTEM_CAPABILITIES_OTHER = 1 << 0,
+ LLDP_SYSTEM_CAPABILITIES_REPEATER = 1 << 1,
+ LLDP_SYSTEM_CAPABILITIES_BRIDGE = 1 << 2,
+ LLDP_SYSTEM_CAPABILITIES_WLAN_AP = 1 << 3,
+ LLDP_SYSTEM_CAPABILITIES_ROUTER = 1 << 4,
+ LLDP_SYSTEM_CAPABILITIES_PHONE = 1 << 5,
+ LLDP_SYSTEM_CAPABILITIES_DOCSIS = 1 << 6,
+ LLDP_SYSTEM_CAPABILITIES_STATION = 1 << 7,
+ LLDP_SYSTEM_CAPABILITIES_CVLAN = 1 << 8,
+ LLDP_SYSTEM_CAPABILITIES_SVLAN = 1 << 9,
+ LLDP_SYSTEM_CAPABILITIES_TPMR = 1 << 10,
+ _LLDP_SYSTEM_CAPABILITIES_MAX,
+ _LLDP_SYSTEM_CAPABILITIES_INVALID = -1,
+} LLDPSystemCapabilities;
+
+typedef enum LLDPMedSubtype {
+ LLDP_MED_SUBTYPE_RESERVED = 0,
+ LLDP_MED_SUBTYPE_CAPABILITIES = 1,
+ LLDP_MED_SUBTYPE_NETWORK_POLICY = 2,
+ LLDP_MED_SUBTYPE_LOCATION_ID = 3,
+ LLDP_MED_SUBTYPE_EXTENDED_PVMDI = 4,
+ LLDP_MED_SUBTYPE_INV_HWREV = 5,
+ LLDP_MED_SUBTYPE_INV_FWREV = 6,
+ LLDP_MED_SUBTYPE_INV_SWREV = 7,
+ LLDP_MED_SUBTYPE_INV_SERIAL = 8,
+ LLDP_MED_SUBTYPE_INV_MANUFACTURER = 9,
+ LLDP_MED_SUBTYPE_INV_MODELNAME = 10,
+ LLDP_MED_SUBTYPE_INV_ASSETID = 11,
+ _LLDP_MED_SUBTYPE_MAX,
+ _LLDP_MED_SUBTYPE_INVALID = -1,
+} LLDPMedSubtype;
+
+typedef enum LLDPMedCapability {
+ LLDP_MED_CAPABILITY_CAPAPILITIES = 1 << 0,
+ LLDP_MED_CAPABILITY_NETWORK_POLICY = 1 << 1,
+ LLDP_MED_CAPABILITY_LOCATION_ID = 1 << 2,
+ LLDP_MED_CAPABILITY_EXTENDED_PSE = 1 << 3,
+ LLDP_MED_CAPABILITY_EXTENDED_PD = 1 << 4,
+ LLDP_MED_CAPABILITY_INVENTORY = 1 << 5,
+ LLDP_MED_CAPABILITY_MAX,
+ LLDP_MED_CAPABILITY_INVALID = -1,
+} LLDPMedCapability;
--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ 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 <arpa/inet.h>
+
+#include "siphash24.h"
+#include "hashmap.h"
+#include "event-util.h"
+
+#include "lldp-tlv.h"
+#include "lldp-port.h"
+#include "sd-lldp.h"
+#include "prioq.h"
+#include "lldp-internal.h"
+
+/* Section 10.5.2.2 Reception counters */
+struct lldp_agent_statitics {
+ uint64_t stats_ageouts_total;
+ uint64_t stats_frames_discarded_total;
+ uint64_t stats_frames_in_errors_total;
+ uint64_t stats_frames_in_total;
+ uint64_t stats_tlvs_discarded_total;
+ uint64_t stats_tlvs_unrecognized_total;
+};
+
+struct sd_lldp {
+ lldp_port *port;
+
+ Prioq *by_expiry;
+ Hashmap *neighbour_mib;
+
+ lldp_agent_statitics statitics;
+};
+
+static unsigned long chassis_id_hash_func(const void *p,
+ const uint8_t hash_key[HASH_KEY_SIZE]) {
+ uint64_t u;
+ const lldp_chassis_id *id = p;
+
+ assert(id);
+
+ siphash24((uint8_t *) &u, id->data, id->length, hash_key);
+
+ return (unsigned long) u;
+}
+
+static int chassis_id_compare_func(const void *_a, const void *_b) {
+ const lldp_chassis_id *a, *b;
+
+ a = _a;
+ b = _b;
+
+ assert(!a->length || a->data);
+ assert(!b->length || b->data);
+
+ if (a->type != b->type)
+ return -1;
+
+ if (a->length != b->length)
+ return a->length < b->length ? -1 : 1;
+
+ return memcmp(a->data, b->data, a->length);
+}
+
+static const struct hash_ops chassis_id_hash_ops = {
+ .hash = chassis_id_hash_func,
+ .compare = chassis_id_compare_func
+};
+
+static void lldp_mib_delete_objects(sd_lldp *lldp);
+
+static int lldp_receive_frame(sd_lldp *lldp, tlv_packet *tlv) {
+ int r;
+
+ assert(lldp);
+ assert(tlv);
+
+ /* Remove expired packets */
+ if (prioq_size(lldp->by_expiry) > 0)
+ lldp_mib_delete_objects(lldp);
+
+ r = lldp_mib_add_objects(lldp->by_expiry, lldp->neighbour_mib, tlv);
+ if (r < 0)
+ goto out;
+
+ log_lldp("Packet added. MIB size: %d , PQ size: %d",
+ hashmap_size(lldp->neighbour_mib),
+ prioq_size(lldp->by_expiry));
+
+ lldp->statitics.stats_frames_in_total ++;
+
+ return 0;
+
+ out:
+ if (r < 0)
+ log_lldp("Receive frame failed: %s", strerror(-r));
+
+ return 0;
+}
+
+/* 10.3.2 LLDPDU validation: rxProcessFrame() */
+int lldp_handle_packet(tlv_packet *tlv, uint16_t length) {
+ uint16_t type, len, i, l, t;
+ bool chassis_id = false;
+ bool malformed = false;
+ bool port_id = false;
+ bool ttl = false;
+ bool end = false;
+ lldp_port *port;
+ uint8_t *p, *q;
+ sd_lldp *lldp;
+ int r;
+
+ assert(tlv);
+ assert(length > 0);
+
+ port = (lldp_port *) tlv->userdata;
+ lldp = (sd_lldp *) port->userdata;
+
+ if (lldp->port->status == LLDP_PORT_STATUS_DISABLED) {
+ log_lldp("Port is disabled : %s . Dropping ...",
+ lldp->port->ifname);
+ goto out;
+ }
+
+ p = tlv->pdu;
+ p += sizeof(struct ether_header);
+
+ for (i = 1, l = 0; l <= length; i++) {
+
+ memcpy(&t, p, sizeof(uint16_t));
+
+ type = ntohs(t) >> 9;
+ len = ntohs(t) & 0x01ff;
+
+ if (type == LLDP_TYPE_END) {
+ if (len != 0) {
+ log_lldp("TLV type end is not length 0. Length:%d received . Dropping ...",
+ len);
+
+ malformed = true;
+ goto out;
+ }
+
+ end = true;
+
+ break;
+ } else if (type >=_LLDP_TYPE_MAX) {
+ log_lldp("TLV type not recognized %d . Dropping ...",
+ type);
+
+ malformed = true;
+ goto out;
+ }
+
+ /* skip type and lengh encoding */
+ p += 2;
+ q = p;
+
+ p += len;
+ l += (len + 2);
+
+ if (i <= 3) {
+ if (i != type) {
+ log_lldp("TLV missing or out of order. Dropping ...");
+
+ malformed = true;
+ goto out;
+ }
+ }
+
+ switch(type) {
+ case LLDP_TYPE_CHASSIS_ID:
+
+ if (len < 2) {
+ log_lldp("Received malformed Chassis ID TLV len = %d. Dropping",
+ len);
+
+ malformed = true;
+ goto out;
+ }
+
+ if (chassis_id) {
+ log_lldp("Duplicate Chassis ID TLV found. Dropping ...");
+
+ malformed = true;
+ goto out;
+ }
+
+ /* Look what subtype it has */
+ if (*q == LLDP_CHASSIS_SUBTYPE_RESERVED ||
+ *q > LLDP_CHASSIS_SUBTYPE_LOCALLY_ASSIGNED) {
+ log_lldp("Unknown subtype: %d found in Chassis ID TLV . Dropping ...",
+ *q);
+
+ malformed = true;
+ goto out;
+
+ }
+
+ chassis_id = true;
+
+ break;
+ case LLDP_TYPE_PORT_ID:
+
+ if (len < 2) {
+ log_lldp("Received malformed Port ID TLV len = %d. Dropping",
+ len);
+
+ malformed = true;
+ goto out;
+ }
+
+ if (port_id) {
+ log_lldp("Duplicate Port ID TLV found. Dropping ...");
+
+ malformed = true;
+ goto out;
+ }
+
+ /* Look what subtype it has */
+ if (*q == LLDP_PORT_SUBTYPE_RESERVED ||
+ *q > LLDP_PORT_SUBTYPE_LOCALLY_ASSIGNED) {
+ log_lldp("Unknown subtype: %d found in Port ID TLV . Dropping ...",
+ *q);
+
+ malformed = true;
+ goto out;
+
+ }
+
+ port_id = true;
+
+ break;
+ case LLDP_TYPE_TTL:
+
+ if(len != 2) {
+ log_lldp(
+ "Received invalid lenth: %d TTL TLV. Dropping ...",
+ len);
+
+ malformed = true;
+ goto out;
+ }
+
+ if (ttl) {
+ log_lldp("Duplicate TTL TLV found. Dropping ...");
+
+ malformed = true;
+ goto out;
+ }
+
+ ttl = true;
+
+ break;
+ default:
+
+ if (len == 0) {
+ log_lldp("TLV type = %d's, length 0 received . Dropping ...",
+ type);
+
+ malformed = true;
+ goto out;
+ }
+ break;
+ }
+ }
+
+ if(!chassis_id || !port_id || !ttl || !end) {
+ log_lldp( "One or more mandotory TLV missing . Dropping ...");
+
+ malformed = true;
+ goto out;
+
+ }
+
+ r = tlv_packet_parse_pdu(tlv, length);
+ if (r < 0) {
+ log_lldp( "Failed to parse the TLV. Dropping ...");
+
+ malformed = true;
+ goto out;
+ }
+
+ return lldp_receive_frame(lldp, tlv);
+
+ out:
+ if (malformed) {
+ lldp->statitics.stats_frames_discarded_total ++;
+ lldp->statitics.stats_frames_in_errors_total ++;
+ }
+
+ tlv_packet_free(tlv);
+
+ return 0;
+}
+
+static int ttl_expiry_item_prioq_compare_func(const void *a, const void *b) {
+ const lldp_neighbour_port *p = a, *q = b;
+
+ if (p->until < q->until)
+ return -1;
+
+ if (p->until > q->until)
+ return 1;
+
+ return 0;
+}
+
+/* 10.5.5.2.1 mibDeleteObjects ()
+ * The mibDeleteObjects () procedure deletes all information in the LLDP remote
+ * systems MIB associated with the MSAP identifier if an LLDPDU is received with
+ * an rxTTL value of zero (see 10.3.2) or the timing counter rxInfoTTL expires. */
+
+static void lldp_mib_delete_objects(sd_lldp *lldp) {
+ lldp_neighbour_port *p;
+ usec_t t = 0;
+
+ /* Remove all entries that are past their TTL */
+ for (;;) {
+
+ if (prioq_size(lldp->by_expiry) <= 0)
+ break;
+
+ p = prioq_peek(lldp->by_expiry);
+ if (!p)
+ break;
+
+ if (t <= 0)
+ t = now(CLOCK_BOOTTIME);
+
+ if (p->until > t)
+ break;
+
+ lldp_neighbour_port_remove_and_free(p);
+
+ lldp->statitics.stats_ageouts_total ++;
+ }
+}
+
+static void lldp_mib_objects_flush(sd_lldp *lldp) {
+ lldp_neighbour_port *p, *q;
+ lldp_chassis *c;
+
+ assert(lldp);
+ assert(lldp->neighbour_mib);
+ assert(lldp->by_expiry);
+
+ /* Drop all packets */
+ while ((c = hashmap_steal_first(lldp->neighbour_mib))) {
+
+ LIST_FOREACH_SAFE(port, p, q, c->ports) {
+ lldp_neighbour_port_remove_and_free(p);
+ }
+ }
+
+ assert(hashmap_size(lldp->neighbour_mib) == 0);
+ assert(prioq_size(lldp->by_expiry) == 0);
+}
+
+int sd_lldp_start(sd_lldp *lldp) {
+ int r;
+
+ assert_return(lldp, -EINVAL);
+ assert_return(lldp->port, -EINVAL);
+
+ lldp->port->status = LLDP_PORT_STATUS_ENABLED;
+
+ r = lldp_port_start(lldp->port);
+ if (r < 0) {
+ log_lldp("Failed to start Port : %s , %s",
+ lldp->port->ifname,
+ strerror(-r));
+ return r;
+ }
+
+ return 0;
+}
+
+int sd_lldp_stop(sd_lldp *lldp) {
+ int r;
+
+ assert_return(lldp, -EINVAL);
+ assert_return(lldp->port, -EINVAL);
+
+ lldp->port->status = LLDP_PORT_STATUS_DISABLED;
+
+ r = lldp_port_stop(lldp->port);
+ if (r < 0)
+ return r;
+
+ lldp_mib_objects_flush(lldp);
+
+ return 0;
+}
+
+int sd_lldp_attach_event(sd_lldp *lldp, sd_event *event, int priority) {
+ int r;
+
+ assert_return(lldp, -EINVAL);
+ assert_return(!lldp->port->event, -EBUSY);
+
+ if (event)
+ lldp->port->event = sd_event_ref(event);
+ else {
+ r = sd_event_default(&lldp->port->event);
+ if (r < 0)
+ return r;
+ }
+
+ lldp->port->event_priority = priority;
+
+ return 0;
+}
+
+int sd_lldp_detach_event(sd_lldp *lldp) {
+
+ assert_return(lldp, -EINVAL);
+
+ lldp->port->event = sd_event_unref(lldp->port->event);
+
+ return 0;
+}
+
+void sd_lldp_free(sd_lldp *lldp) {
+
+ if (!lldp)
+ return;
+
+ /* Drop all packets */
+ lldp_mib_objects_flush(lldp);
+
+ lldp_port_free(lldp->port);
+
+ hashmap_free(lldp->neighbour_mib);
+ prioq_free(lldp->by_expiry);
+
+ free(lldp);
+}
+
+int sd_lldp_new(int ifindex,
+ char *ifname,
+ struct ether_addr *mac,
+ sd_lldp **ret) {
+ _cleanup_sd_lldp_free_ sd_lldp *lldp = NULL;
+ int r;
+
+ assert_return(ret, -EINVAL);
+ assert_return(ifindex > 0, -EINVAL);
+ assert_return(ifname, -EINVAL);
+ assert_return(mac, -EINVAL);
+
+ lldp = new0(sd_lldp, 1);
+ if (!lldp)
+ return -ENOMEM;
+
+ r = lldp_port_new(ifindex, ifname, mac, lldp, &lldp->port);
+ if (r < 0)
+ return r;
+
+ lldp->neighbour_mib = hashmap_new(&chassis_id_hash_ops);
+ if (!lldp->neighbour_mib)
+ return -ENOMEM;
+
+ r = prioq_ensure_allocated(&lldp->by_expiry,
+ ttl_expiry_item_prioq_compare_func);
+ if (r < 0)
+ return r;
+
+ *ret = lldp;
+ lldp = NULL;
+
+ return 0;
+}
--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ 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/>.
+***/
+
+#pragma once
+
+#include "lldp-tlv.h"
+#include "sd-event.h"
+
+typedef struct sd_lldp sd_lldp;
+typedef struct lldp_agent_statitics lldp_agent_statitics;
+
+typedef enum LLDPPortStatus {
+ LLDP_PORT_STATUS_NONE,
+ LLDP_PORT_STATUS_ENABLED,
+ LLDP_PORT_STATUS_DISABLED,
+ _LLDP_PORT_STATUS_MAX,
+ _LLDP_PORT_STATUS_INVALID = -1,
+} LLDPPortStatus;
+
+int sd_lldp_new(int ifindex, char *ifname, struct ether_addr *mac, sd_lldp **ret);
+void sd_lldp_free(sd_lldp *lldp);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(sd_lldp *, sd_lldp_free);
+#define _cleanup_sd_lldp_free_ _cleanup_(sd_lldp_freep)
+
+int sd_lldp_start(sd_lldp *lldp);
+int sd_lldp_stop(sd_lldp *lldp);
+
+int sd_lldp_attach_event(sd_lldp *lldp, sd_event *event, int priority);
+int sd_lldp_detach_event(sd_lldp *lldp);
+
+int lldp_handle_packet(tlv_packet *m, uint16_t length);
--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <linux/if.h>
+#include <linux/if_ether.h>
+#include <net/ethernet.h>
+#include <sys/types.h>
+#include <arpa/inet.h>
+
+#include "macro.h"
+#include "lldp.h"
+#include "lldp-tlv.h"
+
+#define TEST_LLDP_PORT "em1"
+#define TEST_LLDP_TYPE_SYSTEM_NAME "systemd-lldp"
+#define TEST_LLDP_TYPE_SYSTEM_DESC "systemd-lldp-desc"
+
+static struct ether_addr mac_addr = {
+ .ether_addr_octet = {'A', 'B', 'C', '1', '2', '3'}
+};
+
+static int lldp_build_tlv_packet(tlv_packet **ret) {
+ _cleanup_tlv_packet_free_ tlv_packet *m = NULL;
+ const uint8_t lldp_dst[] = LLDP_MULTICAST_ADDR;
+ struct ether_header ether;
+
+ /* Append ethernet header */
+ memset(ðer, 0, sizeof(ether));
+ memcpy(ðer.ether_dhost, lldp_dst, ETHER_ADDR_LEN);
+ memcpy(ðer.ether_shost, &mac_addr, ETHER_ADDR_LEN);
+ ether.ether_type = htons(ETHERTYPE_LLDP);
+
+ assert_se(tlv_packet_new(&m) >= 0);
+
+ assert_se(tlv_packet_append_bytes(m, ðer, sizeof(struct ether_header)) >= 0);
+
+ assert_se(lldp_tlv_packet_open_container(m, LLDP_TYPE_CHASSIS_ID) >= 0);
+
+ assert_se(tlv_packet_append_u8(m, LLDP_CHASSIS_SUBTYPE_MAC_ADDRESS) >= 0);
+ assert_se(tlv_packet_append_bytes(m, &mac_addr, ETHER_ADDR_LEN) >= 0);
+
+ assert_se(lldp_tlv_packet_close_container(m) >= 0);
+
+ /* port name */
+ assert_se(lldp_tlv_packet_open_container(m, LLDP_TYPE_PORT_ID) >= 0);
+
+ assert_se(tlv_packet_append_u8(m, LLDP_PORT_SUBTYPE_INTERFACE_NAME) >= 0);
+ assert_se(tlv_packet_append_bytes(m, TEST_LLDP_PORT, strlen(TEST_LLDP_PORT) + 1) >= 0);
+
+ assert_se(lldp_tlv_packet_close_container(m) >= 0);
+
+ /* ttl */
+ assert_se(lldp_tlv_packet_open_container(m, LLDP_TYPE_TTL) >= 0);
+
+ assert_se(tlv_packet_append_u16(m, 170) >= 0);
+
+ assert_se(lldp_tlv_packet_close_container(m) >= 0);
+
+ /* system name */
+ assert_se(lldp_tlv_packet_open_container(m, LLDP_TYPE_SYSTEM_NAME) >= 0);
+
+ assert_se(tlv_packet_append_bytes(m, TEST_LLDP_TYPE_SYSTEM_NAME,
+ strlen(TEST_LLDP_TYPE_SYSTEM_NAME)) >= 0);
+ assert_se(lldp_tlv_packet_close_container(m) >= 0);
+
+ /* system descrition */
+ assert_se(lldp_tlv_packet_open_container(m, LLDP_TYPE_SYSTEM_DESCRIPTION) >= 0);
+
+ assert_se(tlv_packet_append_bytes(m, TEST_LLDP_TYPE_SYSTEM_DESC,
+ strlen(TEST_LLDP_TYPE_SYSTEM_DESC)) >= 0);
+
+ assert_se(lldp_tlv_packet_close_container(m) >= 0);
+
+ /* Mark end of packet */
+ assert_se(lldp_tlv_packet_open_container(m, LLDP_TYPE_END) >= 0);
+ assert_se(lldp_tlv_packet_close_container(m) >= 0);
+
+ *ret = m;
+
+ m = NULL;
+
+ return 0;
+}
+
+static int lldp_parse_chassis_tlv(tlv_packet *m, uint8_t *type) {
+ uint8_t *p, subtype;
+ uint16_t length;
+
+ assert_se(lldp_tlv_packet_enter_container(m, LLDP_TYPE_CHASSIS_ID) >= 0);
+ assert_se(tlv_packet_read_u8(m, &subtype) >= 0);
+
+ switch (subtype) {
+ case LLDP_CHASSIS_SUBTYPE_MAC_ADDRESS:
+
+ *type = LLDP_CHASSIS_SUBTYPE_MAC_ADDRESS;
+ assert_se(tlv_packet_read_bytes(m, &p, &length) >= 0);
+
+ assert_se(memcmp(p, &mac_addr.ether_addr_octet, ETHER_ADDR_LEN) == 0);
+
+ break;
+ default:
+ assert_not_reached("Unhandled option");
+ }
+
+ assert_se(lldp_tlv_packet_exit_container(m) >= 0);
+
+ return 0;
+}
+
+static int lldp_parse_port_id_tlv(tlv_packet *m) {
+ char *str = NULL, *p;
+ uint16_t length;
+ uint8_t subtype;
+
+ assert_se(lldp_tlv_packet_enter_container(m, LLDP_TYPE_PORT_ID) >= 0);
+
+ assert_se(tlv_packet_read_u8(m, &subtype) >= 0);
+
+ switch (subtype) {
+ case LLDP_PORT_SUBTYPE_INTERFACE_NAME:
+ assert_se(tlv_packet_read_string(m, &str, &length) >= 0);
+
+ p = malloc0(length + 1);
+ strncpy(p, str, length-1);
+
+ assert_se(streq(p, TEST_LLDP_PORT) == 1);
+ break;
+ default:
+ assert_not_reached("Unhandled option");
+ }
+
+ assert_se(lldp_tlv_packet_exit_container(m) >= 0);
+
+ return 0;
+}
+
+static int lldp_parse_system_name_tlv(tlv_packet *m) {
+ char *str = NULL, *p;
+ uint16_t length;
+
+ assert_se(lldp_tlv_packet_enter_container(m, LLDP_TYPE_SYSTEM_NAME) >= 0);
+ assert_se(tlv_packet_read_string(m, &str, &length) >= 0);
+
+ p = malloc0(length + 1);
+ strncpy(p, str, length);
+
+ assert_se(streq(p, TEST_LLDP_TYPE_SYSTEM_NAME) == 1);
+
+ assert_se(lldp_tlv_packet_exit_container(m) >= 0);
+
+ return 1;
+}
+
+static int lldp_parse_system_desc_tlv(tlv_packet *m) {
+ char *str = NULL, *p;
+ uint16_t length;
+
+ assert_se(lldp_tlv_packet_enter_container(m, LLDP_TYPE_SYSTEM_DESCRIPTION) >= 0);
+ assert_se(tlv_packet_read_string(m, &str, &length) >= 0);
+
+ p = malloc0(length + 1);
+ strncpy(p, str, length);
+
+ assert_se(streq(p, TEST_LLDP_TYPE_SYSTEM_DESC) == 1);
+
+ assert_se(lldp_tlv_packet_exit_container(m) >= 0);
+
+ return 0;
+}
+
+static int lldp_parse_ttl_tlv(tlv_packet *m) {
+ uint16_t ttl;
+
+ assert_se(lldp_tlv_packet_enter_container(m, LLDP_TYPE_TTL) >= 0);
+ assert_se(tlv_packet_read_u16(m, &ttl) >= 0);
+
+ assert_se(ttl == 170);
+
+ assert_se(lldp_tlv_packet_exit_container(m) >= 0);
+
+ return 0;
+}
+
+static int lldp_parse_tlv_packet(tlv_packet *m, int len) {
+ uint8_t subtype;
+
+ assert_se(tlv_packet_parse_pdu(m, len) >= 0);
+ assert_se(lldp_parse_chassis_tlv(m, &subtype) >= 0);
+ assert_se(lldp_parse_port_id_tlv(m) >= 0);
+ assert_se(lldp_parse_system_name_tlv(m) >= 0);
+ assert_se(lldp_parse_ttl_tlv(m) >= 0);
+ assert_se(lldp_parse_system_desc_tlv(m) >= 0);
+
+ return 0;
+}
+
+int main(int argc, char *argv[]) {
+ _cleanup_tlv_packet_free_ tlv_packet *tlv = NULL;
+
+ /* form a packet */
+ lldp_build_tlv_packet(&tlv);
+
+ /* parse the packet */
+ tlv_packet_parse_pdu(tlv, tlv->length);
+
+ /* verify */
+ lldp_parse_tlv_packet(tlv, tlv->length);
+
+ return 0;
+}
~ianmdlvl / elogind.git / commitdiff