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path: root/src/libsystemd-network/sd-lldp.c
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Diffstat (limited to 'src/libsystemd-network/sd-lldp.c')
-rw-r--r--src/libsystemd-network/sd-lldp.c88
1 files changed, 54 insertions, 34 deletions
diff --git a/src/libsystemd-network/sd-lldp.c b/src/libsystemd-network/sd-lldp.c
index d3ea74404b..1c696f9ef0 100644
--- a/src/libsystemd-network/sd-lldp.c
+++ b/src/libsystemd-network/sd-lldp.c
@@ -145,12 +145,9 @@ static int lldp_receive_frame(sd_lldp *lldp, tlv_packet *tlv) {
/* 10.3.2 LLDPDU validation: rxProcessFrame() */
int lldp_handle_packet(tlv_packet *tlv, uint16_t length) {
+ bool system_description = false, system_name = false, chassis_id = false;
+ bool malformed = false, port_id = false, ttl = false, end = false;
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;
@@ -163,8 +160,7 @@ int lldp_handle_packet(tlv_packet *tlv, uint16_t length) {
lldp = (sd_lldp *) port->userdata;
if (lldp->port->status == LLDP_PORT_STATUS_DISABLED) {
- log_lldp("Port is disabled : %s . Dropping ...",
- lldp->port->ifname);
+ log_lldp("Port: %s is disabled. Dropping.", lldp->port->ifname);
goto out;
}
@@ -182,8 +178,7 @@ int lldp_handle_packet(tlv_packet *tlv, uint16_t length) {
if (type == LLDP_TYPE_END) {
if (len != 0) {
- log_lldp("TLV type end is not length 0. Length:%d received . Dropping ...",
- len);
+ log_lldp("TLV type end must be length 0 (not %d). Dropping.", len);
malformed = true;
goto out;
@@ -193,8 +188,7 @@ int lldp_handle_packet(tlv_packet *tlv, uint16_t length) {
break;
} else if (type >=_LLDP_TYPE_MAX) {
- log_lldp("TLV type not recognized %d . Dropping ...",
- type);
+ log_lldp("TLV type: %d not recognized. Dropping.", type);
malformed = true;
goto out;
@@ -209,7 +203,7 @@ int lldp_handle_packet(tlv_packet *tlv, uint16_t length) {
if (i <= 3) {
if (i != type) {
- log_lldp("TLV missing or out of order. Dropping ...");
+ log_lldp("TLV missing or out of order. Dropping.");
malformed = true;
goto out;
@@ -220,25 +214,22 @@ int lldp_handle_packet(tlv_packet *tlv, uint16_t length) {
case LLDP_TYPE_CHASSIS_ID:
if (len < 2) {
- log_lldp("Received malformed Chassis ID TLV len = %d. Dropping",
- len);
+ log_lldp("Received malformed Chassis ID TLV length: %d. Dropping.", len);
malformed = true;
goto out;
}
if (chassis_id) {
- log_lldp("Duplicate Chassis ID TLV found. Dropping ...");
+ 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);
+ 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;
@@ -251,25 +242,22 @@ int lldp_handle_packet(tlv_packet *tlv, uint16_t length) {
case LLDP_TYPE_PORT_ID:
if (len < 2) {
- log_lldp("Received malformed Port ID TLV len = %d. Dropping",
- len);
+ log_lldp("Received malformed Port ID TLV length: %d. Dropping.", len);
malformed = true;
goto out;
}
if (port_id) {
- log_lldp("Duplicate Port ID TLV found. Dropping ...");
+ 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);
+ 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;
@@ -282,16 +270,14 @@ int lldp_handle_packet(tlv_packet *tlv, uint16_t length) {
case LLDP_TYPE_TTL:
if(len != 2) {
- log_lldp(
- "Received invalid lenth: %d TTL TLV. Dropping ...",
- len);
+ log_lldp("Received invalid TTL TLV lenth: %d. Dropping.", len);
malformed = true;
goto out;
}
if (ttl) {
- log_lldp("Duplicate TTL TLV found. Dropping ...");
+ log_lldp("Duplicate TTL TLV found. Dropping.");
malformed = true;
goto out;
@@ -300,11 +286,45 @@ int lldp_handle_packet(tlv_packet *tlv, uint16_t length) {
ttl = true;
break;
+ case LLDP_TYPE_SYSTEM_NAME:
+
+ /* According to RFC 1035 the length of a FQDN is limited to 255 characters */
+ if (len > 255) {
+ log_lldp("Received invalid system name length: %d. Dropping.", len);
+ malformed = true;
+ goto out;
+ }
+
+ if (system_name) {
+ log_lldp("Duplicate system name found. Dropping.");
+ malformed = true;
+ goto out;
+ }
+
+ system_name = true;
+
+ break;
+ case LLDP_TYPE_SYSTEM_DESCRIPTION:
+
+ /* 0 <= n <= 255 octets */
+ if (len > 255) {
+ log_lldp("Received invalid system description length: %d. Dropping.", len);
+ malformed = true;
+ goto out;
+ }
+
+ if (system_description) {
+ log_lldp("Duplicate system description found. Dropping.");
+ malformed = true;
+ goto out;
+ }
+
+ system_description = true;
+ break;
default:
if (len == 0) {
- log_lldp("TLV type = %d's, length 0 received . Dropping ...",
- type);
+ log_lldp("TLV type: %d length 0 received. Dropping.", type);
malformed = true;
goto out;
@@ -314,7 +334,7 @@ int lldp_handle_packet(tlv_packet *tlv, uint16_t length) {
}
if(!chassis_id || !port_id || !ttl || !end) {
- log_lldp( "One or more mandotory TLV missing . Dropping ...");
+ log_lldp("One or more mandatory TLV missing. Dropping.");
malformed = true;
goto out;
@@ -323,7 +343,7 @@ int lldp_handle_packet(tlv_packet *tlv, uint16_t length) {
r = tlv_packet_parse_pdu(tlv, length);
if (r < 0) {
- log_lldp( "Failed to parse the TLV. Dropping ...");
+ log_lldp("Failed to parse the TLV. Dropping.");
malformed = true;
goto out;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-10 12:11:19 +0000