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Packet.cpp
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#include "Packet.h"
#include "Utils.h"
Packet::Packet(){}
Packet::Packet(const struct pcap_pkthdr* header, const u_char* pkt_data, const u_short& num, StreamPool* ss)
{
streams = ss;
frame = {
num,
transTime(header->ts),
NULL,
NULL,
0,
0,
NULL,
header->len,
NULL,
};
if (pkt_data != NULL && header != NULL)
{
this->pkt_data = (u_char*)malloc(header->len);
memcpy(this->pkt_data, pkt_data, header->len);
decodeEthernet(pkt_data);
}
}
Packet::~Packet()
{
for (auto p : protos)
{
clearProtos(p);
}
}
void Packet::clearProtos(ProtoMsg* proto)
{
if (proto->children.isEmpty())
{
delete proto;
return;
}
for (auto p : proto->children)
{
clearProtos(p);
}
proto->children.clear();
}
void Packet::decodeEthernet(const u_char* payload)
{
// obtain the ethernet msg
Ethernet_Header* ethh = (Ethernet_Header*)payload;
decodeUpper = NULL;
u_short offset = 0;
MsgItem* destination = new MsgItem{
"destination",
MACAddr2String(ethh->destination),
-1,
offset,
48
};
offset += 48;
MsgItem* source = new MsgItem{
"source",
MACAddr2String(ethh->source),
-1,
offset,
48
};
offset += 48;
// judge upper protocol
QString eth_type;
switch (ntohs(ethh->type))
{
case ETHERNET_TYPE_IPv4:
eth_type = "ipv4";
decodeUpper = &Packet::decodeIPv4;
break;
case ETHERNET_TYPE_IPv6:
decodeUpper = &Packet::decodeIPv6;
eth_type = "ipv6";
break;
case ETHERNET_TYPE_ARP:
eth_type = "arp";
decodeUpper = &Packet::decodeARP;
break;
default:
eth_type = "unkown ( 0x" + QString::asprintf("%04x", ntohs(ethh->type)) + " )";
break;
}
MsgItem* type = new MsgItem{
"type",
eth_type,
ntohs(ethh->type),
offset,
48
};
// add protocol item
int hl = ETHERNET_HEADER_LENGTH;
MsgItem* eth_msg = new MsgItem;
eth_msg->name = "ethernet";
eth_msg->offset = 0;
eth_msg->length = hl * 8;
// whether contains FCS or not
//eth_msg->total_length = frame.length - eth_msg->offset - 4;
eth_msg->children.push_back(destination);
eth_msg->children.push_back(source);
eth_msg->children.push_back(type);
protos.push_back(eth_msg);
// refresh frame msg
frame.src_addr = source->desc;
frame.des_addr = destination->desc;
frame.protocol = "ethernet";
frame.stream_index = -1;
// decode the upper protocol
payload += hl;
if (decodeUpper) (this->*decodeUpper)(payload);
}
void Packet::decodeARP(const u_char* payload)
{
ARP_Header* arph = (ARP_Header*)payload;
decodeUpper = NULL;
u_short offset = 0;
MsgItem* hardware_type = new MsgItem{
"hardware type",
QString::number(ntohs(arph->hardware_type)),
ntohs(arph->hardware_type),
offset,
16
};
offset += 16;
MsgItem* protocol_type = new MsgItem{
"protocol type",
QString::number(ntohs(arph->protocol_type)),
ntohs(arph->protocol_type),
offset,
16
};
offset += 16;
MsgItem* hardware_size = new MsgItem{
"hardware size",
QString::number(arph->hardware_size),
arph->hardware_size,
offset,
8
};
offset += 8;
MsgItem* protocol_size = new MsgItem{
"protocol size",
QString::number(arph->protocol_size),
arph->protocol_size,
offset,
8
};
offset += 8;
MsgItem* opcode = new MsgItem{
"opcode",
QString::number(ntohs(arph->opcode)),
ntohs(arph->protocol_size),
offset,
16
};
offset += 16;
MsgItem* source_hardware_addr = new MsgItem{
"source hardware address",
MACAddr2String(arph->source_hardware_addr),
-1,
offset,
48
};
offset += 48;
MsgItem* source_ip_addr = new MsgItem{
"source ip address",
IPv4Addr2String(arph->source_ip_addr),
-1,
offset,
32
};
offset += 32;
MsgItem* destination_hardware_addr = new MsgItem{
"destination hardware address",
MACAddr2String(arph->destination_hardware_addr),
-1,
offset,
48
};
offset += 48;
MsgItem* destination_ip_addr = new MsgItem{
"destination ip address",
IPv4Addr2String(arph->destination_ip_addr),
-1,
offset,
32
};
offset += 32;
int hl = ARP_HEADER_LENGTH;
MsgItem* arp_msg = new MsgItem;
arp_msg->name = "arp";
arp_msg->offset = protos.back()->offset + protos.back()->length;
arp_msg->length = hl * 8;
arp_msg->children.push_back(hardware_type);
arp_msg->children.push_back(protocol_type);
arp_msg->children.push_back(hardware_size);
arp_msg->children.push_back(hardware_size);
arp_msg->children.push_back(opcode);
arp_msg->children.push_back(source_hardware_addr);
arp_msg->children.push_back(source_ip_addr);
arp_msg->children.push_back(destination_hardware_addr);
arp_msg->children.push_back(destination_ip_addr);
protos.push_back(arp_msg);
frame.protocol = "arp";
}
void Packet::decodeIPv4(const u_char* payload)
{
// obtain the ipv4 msg
IPv4_Header* ipv4h = (IPv4_Header*)payload;
decodeUpper = NULL;
u_short offset = 0;
MsgItem* version = new MsgItem{
"version",
QString::number((u_char)(ipv4h->version_headerlength & 0xf0) >> 4),
(u_char)(ipv4h->version_headerlength & 0xf0) >> 4,
offset,
4
};
offset += 4;
u_int headerlength = (ipv4h->version_headerlength & 0x0f) * 4;
MsgItem* header_length = new MsgItem{
"header length",
QString::number(headerlength),
(int)headerlength,
offset,
4
};
offset += 4;
MsgItem* differentiated_services = new MsgItem{
"differentiated services",
QString::number(ipv4h->differentiated_services),
ipv4h->differentiated_services,
offset,
8
};
offset += 8;
MsgItem* total_length = new MsgItem{
"total length",
QString::number(ntohs(ipv4h->total_length)),
ntohs(ipv4h->total_length),
offset,
16
};
offset += 16;
MsgItem* identification = new MsgItem{
"identification",
QString::number(ntohs(ipv4h->identification)),
ntohs(ipv4h->identification),
offset,
16
};
offset += 16;
QString ipv4_flags;
bool ipv4_reserved = ntohs(ipv4h->flags_fragmentoffset) & 0x8000;
bool ipv4_df = ntohs(ipv4h->flags_fragmentoffset) & 0x4000;
bool ipv4_mf = ntohs(ipv4h->flags_fragmentoffset) & 0x2000;
if (ipv4_df)
{
ipv4_flags = "don't fragment";
}
else if (!ipv4_df && ipv4_mf) {
ipv4_flags = "more fragments";
}
else {
ipv4_flags = "no more fragments";
}
MsgItem* flags = new MsgItem{
"flags",
ipv4_flags,
-1,
offset,
3
};
flags->children.push_back(
new MsgItem{
"Reserved bit",
ipv4_reserved ? "Set" : "Not Set",
ipv4_reserved,
0,
1
}
);
flags->children.push_back(
new MsgItem{
"Don't fragment",
ipv4_df ? "Set" : "Not Set",
ipv4_df,
1,
1
}
);
flags->children.push_back(
new MsgItem{
"More fragments",
ipv4_mf ? "Set" : "Not Set",
ipv4_mf,
2,
1
}
);
offset += 3;
MsgItem* fragment_offset = new MsgItem{
"fragment offset",
QString::number((ntohs(ipv4h->flags_fragmentoffset) & 0xe000) >> 13),
(ntohs(ipv4h->flags_fragmentoffset) & 0xe000) >> 13,
offset,
13
};
offset += 13;
MsgItem* time_to_live = new MsgItem{
"time to live",
QString::number(ipv4h->time_to_live),
ipv4h->time_to_live,
offset,
8
};
offset += 8;
// judge upper protocol
QString ipv4_protocol;
switch (ipv4h->protocol)
{
case 1:
ipv4_protocol = "ICMP";
decodeUpper = &Packet::decodeICMP;
break;
case 2:
ipv4_protocol = "IGMP";
break;
case 4:
ipv4_protocol = "IPv4";
decodeUpper = &Packet::decodeIPv4;
break;
case 6:
ipv4_protocol = "TCP";
decodeUpper = &Packet::decodeTCP;
break;
case 8:
ipv4_protocol = "EGP";
break;
case 9:
ipv4_protocol = "IGP";
break;
case 17:
ipv4_protocol = "UDP";
decodeUpper = &Packet::decodeUDP;
break;
case 41:
ipv4_protocol = "IPv6";
decodeUpper = &Packet::decodeIPv6;
break;
case 50:
ipv4_protocol = "ESP";
break;
case 51:
ipv4_protocol = "AH";
break;
default:
ipv4_protocol = "Unknown(" + QString::number(ipv4h->protocol) + ")";
break;
}
MsgItem* protocol = new MsgItem{
"protocol",
ipv4_protocol,
ipv4h->protocol,
offset,
8
};
offset += 8;
MsgItem* header_checksum = new MsgItem{
"header checksum",
QString::asprintf("0x%04x", ntohs(ipv4h->header_checksum)),
-1,
offset,
16
};
offset += 16;
MsgItem* source = new MsgItem{
"source",
IPv4Addr2String(ipv4h->source),
-1,
offset,
32
};
offset += 32;
MsgItem* destination = new MsgItem{
"destination",
IPv4Addr2String(ipv4h->destination),
-1,
offset,
32
};
offset += 32;
MsgItem* options = NULL;
if (headerlength > IPV4_BASE_HEADER_LENGTH)
{
options = new MsgItem{
"options",
QString::number(headerlength - IPV4_BASE_HEADER_LENGTH) + "bytes",
-1,
offset,
headerlength - IPV4_BASE_HEADER_LENGTH
};
}
int hl = headerlength;
MsgItem* ipv4_msg = new MsgItem;
ipv4_msg->name = "ipv4";
ipv4_msg->offset = protos.back()->offset + protos.back()->length;
ipv4_msg->length = hl * 8;
ipv4_msg->children.push_back(version);
ipv4_msg->children.push_back(header_length);
ipv4_msg->children.push_back(differentiated_services);
ipv4_msg->children.push_back(total_length);
ipv4_msg->children.push_back(identification);
ipv4_msg->children.push_back(flags);
ipv4_msg->children.push_back(fragment_offset);
ipv4_msg->children.push_back(time_to_live);
ipv4_msg->children.push_back(protocol);
ipv4_msg->children.push_back(header_checksum);
ipv4_msg->children.push_back(source);
ipv4_msg->children.push_back(destination);
if (options) ipv4_msg->children.push_back(options);
protos.push_back(ipv4_msg);
frame.src_addr = source->desc;
frame.des_addr = destination->desc;
frame.protocol = "ipv4";
// decode upper protocol
payload += hl;
if (decodeUpper) (this->*decodeUpper)(payload);
}
void Packet::decodeIPv6(const u_char* payload)
{
IPv6_Header* ipv6h = (IPv6_Header*)payload;
decodeUpper = NULL;
u_short offset = 0;
MsgItem* version = new MsgItem{
"version",
QString::number((ntohi(ipv6h->version_traffic_flow) & 0xf0000000) >> 28),
(int)((ntohi(ipv6h->version_traffic_flow & 0xf0000000)) >> 28),
offset,
4
};
offset += 4;
MsgItem* traffic_class = new MsgItem{
"traffic class",
QString::asprintf("0x%02x", ntohi(ipv6h->version_traffic_flow & 0x0ff00000) >> 20),
(int)(ntohi(ipv6h->version_traffic_flow & 0x0ff00000) >> 20),
offset,
8
};
offset += 8;
MsgItem* flow_label = new MsgItem{
"flow label",
QString::asprintf("0x%05x", ntohi(ipv6h->version_traffic_flow) & 0x000fffff),
(int)(ntohi(ipv6h->version_traffic_flow) & 0x000fffff),
offset,
20
};
offset += 20;
MsgItem* payload_length = new MsgItem{
"payload length",
QString::number(ntohs(ipv6h->payload_length)) + "bytes",
ntohs(ipv6h->payload_length),
offset,
16
};
offset += 16;
QString nextheader;
bool other = false;
switch (ipv6h->next_header)
{
case 1:
nextheader = "ICMP";
decodeUpper = &Packet::decodeICMP;
break;
case 2:
nextheader = "IGMP";
break;
case 6:
nextheader = "TCP";
decodeUpper = &Packet::decodeTCP;
break;
case 17:
nextheader = "UDP";
decodeUpper = &Packet::decodeUDP;
break;
default:
nextheader = "other header(" + QString::number(ipv6h->next_header) + ")";
other = true;
break;
}
MsgItem* next_header = new MsgItem{
"next header",
nextheader,
ipv6h->next_header,
offset,
8
};
offset += 8;
MsgItem* hop_limit = new MsgItem{
"hop limit",
QString::number(ipv6h->hop_limit),
ipv6h->hop_limit,
offset,
8
};
offset += 8;
MsgItem* source = new MsgItem{
"source",
IPv6Addr2String(ipv6h->source),
-1,
offset,
128
};
offset += 128;
MsgItem* destination = new MsgItem{
"destination",
IPv6Addr2String(ipv6h->destination),
-1,
offset,
128
};
offset += 128;
// cann't deal with extension header now
MsgItem* ext_headers = NULL;
int ext_len = 0;
int hl = IPV6_BASE_HEADER_LENGTH + ext_len;
MsgItem* ipv6_msg = new MsgItem;
ipv6_msg->name = "ipv6";
ipv6_msg->offset = protos.back()->offset + protos.back()->length;
ipv6_msg->length = hl * 8;
ipv6_msg->children.push_back(version);
ipv6_msg->children.push_back(traffic_class);
ipv6_msg->children.push_back(flow_label);
ipv6_msg->children.push_back(payload_length);
ipv6_msg->children.push_back(next_header);
ipv6_msg->children.push_back(hop_limit);
ipv6_msg->children.push_back(source);
ipv6_msg->children.push_back(destination);
if (ext_headers) ipv6_msg->children.push_back(ext_headers);
protos.push_back(ipv6_msg);
frame.src_addr = source->desc;
frame.des_addr = destination->desc;
frame.protocol = "ipv6";
payload += hl;
if (decodeUpper) (this->*decodeUpper)(payload);
}
void Packet::decodeICMP(const u_char* payload)
{
ICMP_Header* icmph = (ICMP_Header*)payload;
decodeUpper = NULL;
u_short offset = 0;
QString type;
switch (ntohs(icmph->type))
{
case 0x0000:
type = "echo reply";
break;
case 0x0300:
type = "network unreachable";
break;
case 0x0301:
type = "host unreachable";
break;
case 0x0302:
type = "protocol unreachable";
break;
case 0x0303:
type = "port unreachable";
break;
case 0x0304:
type = "fragmentation needed but no flag bit set";
break;
case 0x0305:
type = "source routing failed";
break;
case 0x0306:
type = "destination network unknown";
break;
case 0x0307:
type = "dsetination host unknown";
break;
case 0x0308:
type = "source host isolated";
break;
case 0x0309:
type = "destination network administratively prohibited";
break;
case 0x030a:
type = "destination host administratively prohibited";
break;
case 0x030b:
type = "network unreachable for TOS";
break;
case 0x030c:
type = "host unreachable for TOS";
break;
case 0x030d:
type = "communication administratively prohibited by filtering";
break;
case 0x030e:
type = "host precedence violation";
break;
case 0x030f:
type = "precedence cutoff in effect";
break;
case 0x0400:
type = "source quench";
break;
case 0x0500:
type = "redirect for network";
break;
case 0x0501:
type = "redirect for host";
break;
case 0x0502:
type = "redirect for TOS and network";
break;
case 0x0503:
type = "redirect for TOS and host";
break;
case 0x0800:
type = "echo request";
break;
case 0x0900:
type = "router advertisement";
break;
case 0x0a00:
type = "router solicitation";
break;
case 0x0b00:
type = "TTL equals 0 during transit";
break;
case 0x0b01:
type = "TTL equals 0 during reassembly";
break;
case 0x0c00:
type = "IP header bad (catchall error)";
break;
case 0x0c01:
type = "required options missing";
break;
case 0x0d00:
type = "timestamp request (obsolete)";
break;
case 0x0e00:
type = "timestamp reply (obsolete)";
break;
case 0x0f00:
type = "information request (obsolete)";
break;
case 0x1000:
type = "information reply (obsolete)";
break;
case 0x1100:
type = "address mask request";
break;
}
MsgItem* typecode = new MsgItem{
"type",
type,
ntohs(icmph->type),
offset,
16,
};
offset += 16;
MsgItem* checksum = new MsgItem{
"checksum",
QString::number(ntohs(icmph->checksum)),
ntohs(icmph->checksum),
offset,
16,
};
offset += 16;
MsgItem* other = new MsgItem{
"other",
QString::number(ntohi(icmph->other)),
(int)(ntohi(icmph->other)),
offset,
32
};
int h1 = ICMP_BASE_HEADER_LENGTH;
MsgItem* icmp_msg = new MsgItem;
icmp_msg->name = "icmp";
icmp_msg->offset = protos.back()->offset + protos.back()->length;
icmp_msg->length = h1 * 8;
icmp_msg->children.push_back(typecode);
icmp_msg->children.push_back(checksum);
icmp_msg->children.push_back(other);
protos.push_back(icmp_msg);
frame.protocol = "icmp";
}
void Packet::decodeUDP(const u_char* payload)
{
UDP_Header* udph = (UDP_Header*)payload;
decodeUpper = NULL;
u_short offset = 0;
MsgItem* source_port = new MsgItem{
"source port",
QString::number(ntohs(udph->source_port)),
ntohs(udph->source_port),
offset,
16
};
offset += 16;
MsgItem* destination_port = new MsgItem{
"destination port",
QString::number(ntohs(udph->destination_port)),
ntohs(udph->destination_port),
offset,
16
};
offset += 16;
MsgItem* length = new MsgItem{
"length",
QString::number(ntohs(udph->length)),
ntohs(udph->length),
offset,
16
};
offset += 16;
MsgItem* checksum = new MsgItem{
"checksum",
QString::asprintf("%04x", ntohs(udph->checksum)),
ntohs(udph->checksum),
offset,
16
};
offset += 16;
int hl = UDP_HEADER_LENGTH;
MsgItem* udp_msg = new MsgItem;
udp_msg->name = "udp";
udp_msg->offset = protos.back()->offset + protos.back()->length;
udp_msg->length = hl * 8;
udp_msg->children.push_back(source_port);
udp_msg->children.push_back(destination_port);
udp_msg->children.push_back(length);
udp_msg->children.push_back(checksum);
protos.push_back(udp_msg);
frame.src_port = source_port->value;
frame.des_port = destination_port->value;
frame.protocol = "udp";
// stream index
StreamMsg* s = new StreamMsg{
frame.src_addr,
frame.des_addr,
frame.src_port,
frame.des_port,
frame.protocol
};
int idx;
if (!streams->hasStream(s))
{
idx = streams->addStream(s);
}
else {
idx = streams->getStreamIndex(s);
}
frame.stream_index = idx;
payload += hl;
if (decodeUpper) (this->*decodeUpper)(payload);
}
void Packet::decodeTCP(const u_char* payload)
{
TCP_Header* tcph = (TCP_Header*)payload;
decodeUpper = NULL;
u_short offset = 0;
MsgItem* source_port = new MsgItem{
"source port",
QString::number(ntohs(tcph->source_port)),
ntohs(tcph->source_port),
offset,
16
};
offset += 16;
MsgItem* destination_port = new MsgItem{
"destination port",
QString::number(ntohs(tcph->destination_port)),
ntohs(tcph->destination_port),
offset,
16
};
offset += 16;
MsgItem* sequence_number = new MsgItem{
"sequence number",
QString::number(ntohi(tcph->sequence_number)),
(int)ntohi(tcph->sequence_number),
offset,
32
};
offset += 32;
MsgItem* acknowledge_number = new MsgItem{
"acknowledge number",
QString::number(ntohi(tcph->acknowledge_number)),
(int)ntohi(tcph->acknowledge_number),
offset,
32
};
offset += 32;
MsgItem* header_length = new MsgItem{
"header length",
QString::number((ntohs(tcph->headerlength_flags) >> 12) * 4),
(ntohs(tcph->headerlength_flags) >> 12) * 4,
offset,
4
};
offset += 4;
MsgItem* reserved = new MsgItem{
"reserved bits",
QString::number(ntohs(tcph->headerlength_flags) & 0x0fc),
ntohs(tcph->headerlength_flags) & 0x0fc,
offset,
6
};
offset += 6;
bool flags_urg = ntohs(tcph->headerlength_flags) & 0x0020;
bool flags_ack = ntohs(tcph->headerlength_flags) & 0x0010;
bool flags_psh = ntohs(tcph->headerlength_flags) & 0x0008;
bool flags_rst = ntohs(tcph->headerlength_flags) & 0x0004;
bool flags_syn = ntohs(tcph->headerlength_flags) & 0x0002;
bool flags_fin = ntohs(tcph->headerlength_flags) & 0x0001;
QString flagsstr;
if (flags_urg) flagsstr += "URG ";
if (flags_ack) flagsstr += "ACK ";
if (flags_psh) flagsstr += "PSH ";
if (flags_rst) flagsstr += "RST ";
if (flags_syn) flagsstr += "SYN ";
if (flags_fin) flagsstr += "FIN ";
MsgItem* flags = new MsgItem{
"flags",
flagsstr,
(ntohs(tcph->headerlength_flags) & 0x003f),
offset,
6
};
flags->children.push_back(
new MsgItem{
"URG",
flags_urg ? "Set" : "Not Set",
flags_urg,
0,
1
}
);
flags->children.push_back(
new MsgItem{
"ACK",
flags_ack ? "Set" : "Not Set",
flags_ack,
1,
1
}
);
flags->children.push_back(
new MsgItem{
"PSH",
flags_psh ? "Set" : "Not Set",
flags_psh,
2,
1
}
);
flags->children.push_back(
new MsgItem{
"RST",
flags_rst ? "Set" : "Not Set",
flags_rst,
3,
1
}
);
flags->children.push_back(
new MsgItem{
"SYN",
flags_syn ? "Set" : "Not Set",
flags_syn,
4,
1
}
);
flags->children.push_back(
new MsgItem{
"FIN",
flags_fin ? "Set" : "Not Set",
flags_fin,
5,
1
}
);
offset += 6;
MsgItem* window = new MsgItem{
"window",
QString::number(ntohs(tcph->window)),
ntohs(tcph->window),
offset,
16
};
offset += 16;
MsgItem* checksum = new MsgItem{
"checksum",
QString::asprintf("0x%04x", ntohs(tcph->checksum)),
ntohs(tcph->checksum),
offset,
16
};
offset += 16;
MsgItem* urgent_pointer = new MsgItem{
"urgent_pointer",
QString::number(ntohs(tcph->urgent_pointer)),
ntohs(tcph->urgent_pointer),
offset,
16
};
offset += 16;
// options
MsgItem* options = NULL;
if (header_length->value > TCP_BASE_HEADER_LENGTH)
{
options = new MsgItem{
"options",
QString::number(header_length->value - TCP_BASE_HEADER_LENGTH) + "bytes",
-1,
offset,
(u_int)(header_length->value - TCP_BASE_HEADER_LENGTH) * 8
};
}
int hl = header_length->value;
MsgItem* tcp_msg = new MsgItem;
tcp_msg->name = "tcp";
tcp_msg->offset = protos.back()->offset + protos.back()->length;
tcp_msg->length = hl * 8;
tcp_msg->children.push_back(source_port);
tcp_msg->children.push_back(destination_port);
tcp_msg->children.push_back(sequence_number);
tcp_msg->children.push_back(acknowledge_number);
tcp_msg->children.push_back(header_length);
tcp_msg->children.push_back(reserved);
tcp_msg->children.push_back(flags);
tcp_msg->children.push_back(window);
tcp_msg->children.push_back(checksum);
tcp_msg->children.push_back(urgent_pointer);
if (options) tcp_msg->children.push_back(options);
protos.push_back(tcp_msg);
frame.src_port = source_port->value;
frame.des_port = destination_port->value;
frame.protocol = "tcp";
// stream index
StreamMsg* s = new StreamMsg{
frame.src_addr,
frame.des_addr,
frame.src_port,
frame.des_port,
frame.protocol
};
int idx;
if ((flags_syn && !flags_ack) || !streams->hasStream(s))
{
idx = streams->addStream(s);
}
else {
idx = streams->getStreamIndex(s);
}
frame.stream_index = idx;