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Diffstat (limited to 'src/lib/protocols/netbios.c')
-rw-r--r--src/lib/protocols/netbios.c244
1 files changed, 125 insertions, 119 deletions
diff --git a/src/lib/protocols/netbios.c b/src/lib/protocols/netbios.c
index ca649782b..d10a33b1a 100644
--- a/src/lib/protocols/netbios.c
+++ b/src/lib/protocols/netbios.c
@@ -2,7 +2,7 @@
* netbios.c
*
* Copyright (C) 2009-2011 by ipoque GmbH
- * Copyright (C) 2011-15 - ntop.org
+ * Copyright (C) 2011-17 - ntop.org
*
* This file is part of nDPI, an open source deep packet inspection
* library based on the OpenDPI and PACE technology by ipoque GmbH
@@ -23,12 +23,21 @@
*/
-#include "ndpi_protocols.h"
+#include "ndpi_protocol_ids.h"
#ifdef NDPI_PROTOCOL_NETBIOS
+#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_NETBIOS
+
+#include "ndpi_api.h"
+
+
+struct netbios_header {
+ u_int16_t transaction_id, flags, questions, answer_rrs, authority_rrs, additional_rrs;
+};
+
/* The function below has been inherited by tcpdump */
-static int netbios_name_interpret(char *in, char *out, u_int out_len) {
+int ndpi_netbios_name_interpret(char *in, char *out, u_int out_len) {
int ret = 0, len;
char *b;
@@ -46,8 +55,11 @@ static int netbios_name_interpret(char *in, char *out, u_int out_len) {
}
*out = ((in[0]-'A')<<4) + (in[1]-'A');
+
in += 2;
- out++, ret++;
+
+ if(isprint(*out))
+ out++, ret++;
}
*out = 0;
@@ -63,6 +75,7 @@ static int netbios_name_interpret(char *in, char *out, u_int out_len) {
static void ndpi_int_netbios_add_connection(struct ndpi_detection_module_struct
*ndpi_struct, struct ndpi_flow_struct *flow)
{
+
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_NETBIOS, NDPI_PROTOCOL_UNKNOWN);
}
@@ -70,227 +83,232 @@ static void ndpi_int_netbios_add_connection(struct ndpi_detection_module_struct
void ndpi_search_netbios(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &flow->packet;
-
- // struct ndpi_id_struct *src=ndpi_struct->src;
- // struct ndpi_id_struct *dst=ndpi_struct->dst;
-
-
u_int16_t dport;
-
- if (packet->udp != NULL) {
+ char name[64];
+
+ NDPI_LOG_DBG(ndpi_struct, "search netbios\n");
+ if(packet->udp != NULL) {
dport = ntohs(packet->udp->dest);
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct, NDPI_LOG_DEBUG, "netbios udp start\n");
/*check standard NETBIOS over udp to port 137 */
- if ((dport == 137 || 0) && packet->payload_packet_len >= 50) {
+ if((dport == 137 || 0) && packet->payload_packet_len >= 50) {
+ struct netbios_header h;
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct,
- NDPI_LOG_DEBUG, "found netbios port 137 and payload_packet_len 50\n");
+ memcpy(&h, packet->payload, sizeof(struct netbios_header));
+ h.transaction_id = ntohs(h.transaction_id), h.flags = ntohs(h.flags),
+ h.questions = ntohs(h.questions), h.answer_rrs = ntohs(h.answer_rrs),
+ h.authority_rrs = ntohs(h.authority_rrs), h.additional_rrs = ntohs(h.additional_rrs);
+
+ NDPI_LOG_DBG(ndpi_struct, "found netbios port 137 and payload_packet_len 50\n");
- if (ntohs(get_u_int16_t(packet->payload, 2)) == 0 &&
- ntohs(get_u_int16_t(packet->payload, 4)) == 1 &&
- ntohs(get_u_int16_t(packet->payload, 6)) == 0 &&
- ntohs(get_u_int16_t(packet->payload, 8)) == 0 && ntohs(get_u_int16_t(packet->payload, 10)) == 0) {
+ if(h.flags == 0 &&
+ h.questions == 1 &&
+ h.answer_rrs == 0 &&
+ h.authority_rrs == 0 && h.additional_rrs == 0) {
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct,
- NDPI_LOG_DEBUG, "found netbios with questions = 1 and answers = 0, authority = 0 \n");
+ NDPI_LOG_INFO(ndpi_struct, "found netbios with questions = 1 and answers = 0, authority = 0 \n");
ndpi_int_netbios_add_connection(ndpi_struct, flow);
return;
}
- if (packet->payload[2] == 0x80 &&
- ntohs(get_u_int16_t(packet->payload, 4)) == 1 &&
- ntohs(get_u_int16_t(packet->payload, 6)) == 0 &&
- ntohs(get_u_int16_t(packet->payload, 8)) == 0 && ntohs(get_u_int16_t(packet->payload, 10)) == 1) {
+ if(((h.flags & 0x8710) == 0x10) &&
+ h.questions == 1 &&
+ h.answer_rrs == 0 &&
+ h.authority_rrs == 0) {
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct,
- NDPI_LOG_DEBUG, "found netbios with questions = 1 and answers, authority, additional = 0 \n");
+ NDPI_LOG_INFO(ndpi_struct, "found netbios with questions = 1 and answers = 0, authority = 0 and broadcast \n");
+
+ if(ndpi_netbios_name_interpret((char*)&packet->payload[12], name, sizeof(name)) > 0)
+ snprintf((char*)flow->host_server_name, sizeof(flow->host_server_name)-1, "%s", name);
+
+ ndpi_int_netbios_add_connection(ndpi_struct, flow);
+ return;
+ }
+ if(packet->payload[2] == 0x80 &&
+ h.questions == 1 &&
+ h.answer_rrs == 0 &&
+ h.authority_rrs == 0 && h.additional_rrs == 1) {
+
+ NDPI_LOG_INFO(ndpi_struct, "found netbios with questions = 1 and answers, authority, additional = 0 \n");
ndpi_int_netbios_add_connection(ndpi_struct, flow);
return;
}
- if (ntohs(get_u_int16_t(packet->payload, 2)) == 0x4000 &&
- ntohs(get_u_int16_t(packet->payload, 4)) == 1 &&
- ntohs(get_u_int16_t(packet->payload, 6)) == 0 &&
- ntohs(get_u_int16_t(packet->payload, 8)) == 0 && ntohs(get_u_int16_t(packet->payload, 10)) == 1) {
+ if(h.flags == 0x4000 &&
+ h.questions == 1 &&
+ h.answer_rrs == 0 &&
+ h.authority_rrs == 0 && h.additional_rrs == 1) {
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct,
- NDPI_LOG_DEBUG, "found netbios with questions = 1 and answers = 0, authority = 0 \n");
+ NDPI_LOG_INFO(ndpi_struct, "found netbios with questions = 1 and answers = 0, authority = 0 \n");
ndpi_int_netbios_add_connection(ndpi_struct, flow);
return;
}
- if (ntohs(get_u_int16_t(packet->payload, 2)) == 0x8400 &&
- ntohs(get_u_int16_t(packet->payload, 4)) == 0 &&
- ntohs(get_u_int16_t(packet->payload, 6)) == 1 &&
- ntohs(get_u_int16_t(packet->payload, 8)) == 0 && ntohs(get_u_int16_t(packet->payload, 10)) == 0) {
+ if(h.flags == 0x8400 &&
+ h.questions == 0 &&
+ h.answer_rrs == 1 &&
+ h.authority_rrs == 0 && h.additional_rrs == 0) {
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct,
- NDPI_LOG_DEBUG,
+ NDPI_LOG_INFO(ndpi_struct,
"found netbios with flag 8400 questions = 0 and answers = 1, authority, additional = 0 \n");
ndpi_int_netbios_add_connection(ndpi_struct, flow);
return;
}
- if (ntohs(get_u_int16_t(packet->payload, 2)) == 0x8500 &&
- ntohs(get_u_int16_t(packet->payload, 4)) == 0 &&
- ntohs(get_u_int16_t(packet->payload, 6)) == 1 &&
- ntohs(get_u_int16_t(packet->payload, 8)) == 0 && ntohs(get_u_int16_t(packet->payload, 10)) == 0) {
+ if(h.flags == 0x8500 &&
+ h.questions == 0 &&
+ h.answer_rrs == 1 &&
+ h.authority_rrs == 0 && h.additional_rrs == 0) {
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct,
- NDPI_LOG_DEBUG,
+ NDPI_LOG_INFO(ndpi_struct,
"found netbios with flag 8500 questions = 0 and answers = 1, authority, additional = 0 \n");
ndpi_int_netbios_add_connection(ndpi_struct, flow);
return;
}
- if (ntohs(get_u_int16_t(packet->payload, 2)) == 0x2910 &&
- ntohs(get_u_int16_t(packet->payload, 4)) == 1 &&
- ntohs(get_u_int16_t(packet->payload, 6)) == 0 &&
- ntohs(get_u_int16_t(packet->payload, 8)) == 0 && ntohs(get_u_int16_t(packet->payload, 10)) == 1) {
+ if(h.flags == 0x2910 &&
+ h.questions == 1 &&
+ h.answer_rrs == 0 &&
+ h.authority_rrs == 0 && h.additional_rrs == 1) {
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct,
- NDPI_LOG_DEBUG,
+ NDPI_LOG_INFO(ndpi_struct,
"found netbios with flag 2910, questions = 1 and answers, authority=0, additional = 1 \n");
ndpi_int_netbios_add_connection(ndpi_struct, flow);
return;
}
- if (ntohs(get_u_int16_t(packet->payload, 2)) == 0xAD86 &&
- ntohs(get_u_int16_t(packet->payload, 4)) == 0 &&
- ntohs(get_u_int16_t(packet->payload, 6)) == 1 &&
- ntohs(get_u_int16_t(packet->payload, 8)) == 0 && ntohs(get_u_int16_t(packet->payload, 10)) == 0) {
+ if(h.flags == 0xAD86 &&
+ h.questions == 0 &&
+ h.answer_rrs == 1 &&
+ h.authority_rrs == 0 && h.additional_rrs == 0) {
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct,
- NDPI_LOG_DEBUG,
+ NDPI_LOG_INFO(ndpi_struct,
"found netbios with flag ad86 questions = 0 and answers = 1, authority, additional = 0 \n");
ndpi_int_netbios_add_connection(ndpi_struct, flow);
return;
}
- if (ntohs(get_u_int16_t(packet->payload, 2)) == 0x0110 &&
- ntohs(get_u_int16_t(packet->payload, 4)) == 1 &&
- ntohs(get_u_int16_t(packet->payload, 6)) == 0 &&
- ntohs(get_u_int16_t(packet->payload, 8)) == 0 && ntohs(get_u_int16_t(packet->payload, 10)) == 0) {
+ if(h.flags == 0x0110 &&
+ h.questions == 1 &&
+ h.answer_rrs == 0 &&
+ h.authority_rrs == 0 && h.additional_rrs == 0) {
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct,
- NDPI_LOG_DEBUG,
+ NDPI_LOG_INFO(ndpi_struct,
"found netbios with flag 0110 questions = 1 and answers = 0, authority, additional = 0 \n");
ndpi_int_netbios_add_connection(ndpi_struct, flow);
return;
}
- if ((ntohs(get_u_int16_t(packet->payload, 2)) & 0xf800) == 0) {
+ if((h.flags & 0xf800) == 0) {
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct, NDPI_LOG_DEBUG, "possible netbios name query request\n");
+ NDPI_LOG_DBG2(ndpi_struct, "possible netbios name query request\n");
- if (get_u_int16_t(packet->payload, 4) == htons(1) &&
+ if(get_u_int16_t(packet->payload, 4) == htons(1) &&
get_u_int16_t(packet->payload, 6) == 0 &&
get_u_int16_t(packet->payload, 8) == 0 && get_u_int16_t(packet->payload, 10) == 0) {
/* name is encoded as described in rfc883 */
u_int8_t name_length = packet->payload[12];
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct, NDPI_LOG_DEBUG,
+ NDPI_LOG_DBG2(ndpi_struct,
"possible netbios name query request, one question\n");
- if (packet->payload_packet_len == 12 + 1 + name_length + 1 + 2 + 2) {
+ if(packet->payload_packet_len == 12 + 1 + name_length + 1 + 2 + 2) {
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct, NDPI_LOG_DEBUG,
+ NDPI_LOG_DBG2(ndpi_struct,
"possible netbios name query request, length matches\n");
/* null terminated? */
- if (packet->payload[12 + name_length + 1] == 0 &&
+ if(packet->payload[12 + name_length + 1] == 0 &&
get_u_int16_t(packet->payload, 12 + name_length + 2) == htons(0x0020) &&
get_u_int16_t(packet->payload, 12 + name_length + 4) == htons(0x0001)) {
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct, NDPI_LOG_DEBUG,
+ NDPI_LOG_INFO(ndpi_struct,
"found netbios name query request\n");
ndpi_int_netbios_add_connection(ndpi_struct, flow);
return;
}
}
}
- } else if ((ntohs(get_u_int16_t(packet->payload, 2)) & 0xf800) == 0x8000) {
-
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct, NDPI_LOG_DEBUG,
+ } else if((h.flags & 0xf800) == 0x8000) {
+ NDPI_LOG_DBG2(ndpi_struct,
"possible netbios name query response\n");
- if (get_u_int16_t(packet->payload, 4) == 0 &&
+ if(get_u_int16_t(packet->payload, 4) == 0 &&
get_u_int16_t(packet->payload, 6) == htons(1) &&
get_u_int16_t(packet->payload, 8) == 0 && get_u_int16_t(packet->payload, 10) == 0) {
/* name is encoded as described in rfc883 */
u_int8_t name_length = packet->payload[12];
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct, NDPI_LOG_DEBUG,
+ NDPI_LOG_DBG2(ndpi_struct,
"possible netbios positive name query response, one answer\n");
- if (packet->payload_packet_len >= 12 + 1 + name_length + 1 + 2 + 2) {
+ if(packet->payload_packet_len >= 12 + 1 + name_length + 1 + 2 + 2) {
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct, NDPI_LOG_DEBUG,
+ NDPI_LOG_DBG2(ndpi_struct,
"possible netbios name query response, length matches\n");
/* null terminated? */
- if (packet->payload[12 + name_length + 1] == 0 &&
+ if(packet->payload[12 + name_length + 1] == 0 &&
get_u_int16_t(packet->payload, 12 + name_length + 2) == htons(0x0020) &&
get_u_int16_t(packet->payload, 12 + name_length + 4) == htons(0x0001)) {
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct, NDPI_LOG_DEBUG,
+ NDPI_LOG_INFO(ndpi_struct,
"found netbios name query response\n");
ndpi_int_netbios_add_connection(ndpi_struct, flow);
return;
}
}
- } else if (get_u_int16_t(packet->payload, 4) == 0 &&
+ } else if(get_u_int16_t(packet->payload, 4) == 0 &&
get_u_int16_t(packet->payload, 6) == 0 &&
get_u_int16_t(packet->payload, 8) == 0 && get_u_int16_t(packet->payload, 10) == 0) {
/* name is encoded as described in rfc883 */
u_int8_t name_length = packet->payload[12];
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct, NDPI_LOG_DEBUG,
+ NDPI_LOG_DBG2(ndpi_struct,
"possible netbios negative name query response, one answer\n");
- if (packet->payload_packet_len >= 12 + 1 + name_length + 1 + 2 + 2) {
+ if(packet->payload_packet_len >= 12 + 1 + name_length + 1 + 2 + 2) {
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct, NDPI_LOG_DEBUG,
+ NDPI_LOG_DBG2(ndpi_struct,
"possible netbios name query response, length matches\n");
/* null terminated? */
- if (packet->payload[12 + name_length + 1] == 0 &&
+ if(packet->payload[12 + name_length + 1] == 0 &&
get_u_int16_t(packet->payload, 12 + name_length + 2) == htons(0x000A) &&
get_u_int16_t(packet->payload, 12 + name_length + 4) == htons(0x0001)) {
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct, NDPI_LOG_DEBUG,
+ NDPI_LOG_INFO(ndpi_struct,
"found netbios name query response\n");
ndpi_int_netbios_add_connection(ndpi_struct, flow);
return;
}
}
- } else if (get_u_int16_t(packet->payload, 4) == 0 &&
+ } else if(get_u_int16_t(packet->payload, 4) == 0 &&
get_u_int16_t(packet->payload, 6) == 0 &&
get_u_int16_t(packet->payload, 8) == htons(1) && get_u_int16_t(packet->payload, 10) == htons(1)) {
/* name is encoded as described in rfc883 */
u_int8_t name_length = packet->payload[12];
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct, NDPI_LOG_DEBUG,
+ NDPI_LOG_DBG2(ndpi_struct,
"possible netbios redirect name query response, one answer\n");
- if (packet->payload_packet_len >= 12 + 1 + name_length + 1 + 2 + 2) {
+ if(packet->payload_packet_len >= 12 + 1 + name_length + 1 + 2 + 2) {
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct, NDPI_LOG_DEBUG,
+ NDPI_LOG_DBG2(ndpi_struct,
"possible netbios name query response, length matches\n");
/* null terminated? */
- if (packet->payload[12 + name_length + 1] == 0 &&
+ if(packet->payload[12 + name_length + 1] == 0 &&
get_u_int16_t(packet->payload, 12 + name_length + 2) == htons(0x0002) &&
get_u_int16_t(packet->payload, 12 + name_length + 4) == htons(0x0001)) {
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct, NDPI_LOG_DEBUG,
+ NDPI_LOG_INFO(ndpi_struct,
"found netbios name query response\n");
ndpi_int_netbios_add_connection(ndpi_struct, flow);
return;
@@ -305,25 +323,20 @@ void ndpi_search_netbios(struct ndpi_detection_module_struct *ndpi_struct, struc
/*netbios header token from http://www.protocolbase.net/protocols/protocol_NBDGM.php */
- if ((dport == 138) &&
+ if((dport == 138) &&
packet->payload_packet_len >= 14 &&
ntohs(get_u_int16_t(packet->payload, 10)) == packet->payload_packet_len - 14) {
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct,
- NDPI_LOG_DEBUG, "found netbios port 138 and payload length >= 112 \n");
-
- if (packet->payload[0] >= 0x11 && packet->payload[0] <= 0x16) {
+ NDPI_LOG_DBG2(ndpi_struct, "found netbios port 138 and payload length >= 112 \n");
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct,
- NDPI_LOG_DEBUG, "found netbios with MSG-type 0x11,0x12,0x13,0x14,0x15 or 0x16\n");
+ if(packet->payload[0] >= 0x11 && packet->payload[0] <= 0x16) {
- if (ntohl(get_u_int32_t(packet->payload, 4)) == ntohl(packet->iph->saddr)) {
- char name[64];
+ NDPI_LOG_DBG2(ndpi_struct, "found netbios with MSG-type 0x11,0x12,0x13,0x14,0x15 or 0x16\n");
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct,
- NDPI_LOG_DEBUG, "found netbios with checked ip-address.\n");
+ if(ntohl(get_u_int32_t(packet->payload, 4)) == ntohl(packet->iph->saddr)) {
+ NDPI_LOG_INFO(ndpi_struct, "found netbios with checked ip-address\n");
- if(netbios_name_interpret((char*)&packet->payload[12], name, sizeof(name)) > 0)
+ if(ndpi_netbios_name_interpret((char*)&packet->payload[12], name, sizeof(name)) > 0)
snprintf((char*)flow->host_server_name, sizeof(flow->host_server_name)-1, "%s", name);
ndpi_int_netbios_add_connection(ndpi_struct, flow);
@@ -333,24 +346,20 @@ void ndpi_search_netbios(struct ndpi_detection_module_struct *ndpi_struct, struc
}
}
- if (packet->tcp != NULL) {
+ if(packet->tcp != NULL) {
dport = ntohs(packet->tcp->dest);
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct, NDPI_LOG_DEBUG, "netbios tcp start\n");
-
/* destination port must be 139 */
- if (dport == 139) {
+ if(dport == 139) {
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct, NDPI_LOG_DEBUG, "found netbios with destination port 139\n");
+ NDPI_LOG_DBG2(ndpi_struct, "found netbios with destination port 139\n");
/* payload_packet_len must be 72 */
- if (packet->payload_packet_len == 72) {
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct,
- NDPI_LOG_DEBUG, "found netbios with payload_packen_len = 72. \n");
+ if(packet->payload_packet_len == 72) {
+ NDPI_LOG_DBG2(ndpi_struct, "found netbios with payload_packen_len = 72. \n");
- if (packet->payload[0] == 0x81 && packet->payload[1] == 0 && ntohs(get_u_int16_t(packet->payload, 2)) == 68) {
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct,
- NDPI_LOG_DEBUG,
+ if(packet->payload[0] == 0x81 && packet->payload[1] == 0 && ntohs(get_u_int16_t(packet->payload, 2)) == 68) {
+ NDPI_LOG_INFO(ndpi_struct,
"found netbios with session request = 81, flags=0 and length od following bytes = 68. \n");
ndpi_int_netbios_add_connection(ndpi_struct, flow);
@@ -361,12 +370,9 @@ void ndpi_search_netbios(struct ndpi_detection_module_struct *ndpi_struct, struc
}
- NDPI_LOG(NDPI_PROTOCOL_NETBIOS, ndpi_struct, NDPI_LOG_DEBUG, "exclude netbios\n");
- NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_NETBIOS);
-
+ NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
-
void init_netbios_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id, NDPI_PROTOCOL_BITMASK *detection_bitmask)
{
ndpi_set_bitmask_protocol_detection("NETBIOS", ndpi_struct, detection_bitmask, *id,
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