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abort at the end of data transfer


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Author
abort at the end of data transfer
hi,

i'm using a uclinux on h8 arch. i'm running 2.4.x
kernel with sctp module, developed by openss7.

i'm trying to send a file through a sctp socket. it
seems
to work, but at the end i'm getting an abort chunk
from the client. there is no proper shutdown. the
client just send abort. the server prints an error:
accept: Software caused connection abort.
the client/server buffers are i.e 256. the last sent
data chunk is i.e 6. i'm having non-block mode.

i have attached client and server code and a
capture.

could somebody give me any clue how to fix this
problem?

greetings
magda


---------------------------------------------
server
------------------------------------------
#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/sctp.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/poll.h>
#include <sys/time.h>
#include <signal.h>
#include <getopt.h>
#include <stdlib.h>
#include <string.h>
#include <sys/uio.h>
#include <sys/sysinfo.h>
int nodelay =1;
#define HOST_BUF_LEN 256
char buf[HOST_BUF_LEN];
int init_server(int port){
struct sockaddr_in addr;
int sd;

addr.sin_family = PF_INET;
addr.sin_addr.s_addr = INADDR_ANY;
addr.sin_port = htons(port);
if( (sd=socket(PF_INET, SOCK_SEQPACKET, IPPROTO_SCTP)) < 0 ) {
perror("socket failed\n");
return(-1);

}

if( bind( sd, (struct sockaddr *)&addr,sizeof(addr) ) == -1 ) {
perror("bind");
goto errout;
exit(1);
}
else printf("binded\n");
if (listen(sd, 1)==-1) {
printf("not listening...\n");
goto errout;
}
else printf("listening...\n");
return sd;
errout:
close(sd);
return(-1);
}
void serve(int listener){
fd_set master;  // master file descriptor list
fd_set read_fds; //temp file descriptor list for select()
//struct sockaddr_in myaddr;     //server address
struct sockaddr_in remoteaddr; //client address
int fdmax;      //  maximum file descriptor number
//int listener;//     listening socket descriptor
int newfd;     //   newly accept()ed socket descriptor
char buf[HOST_BUF_LEN];   // buffer for client data
int nbytes;
int addrlen;
int i ;
FD_ZERO(&master); //   clear the master and temp sets
FD_ZERO(&read_fds);
FD_SET(listener, &master);
//keep track of the biggest file descriptor
fdmax = listener; //so far, it's this one
//main loop
for(;;) {
read_fds = master; //copy it
if (select(fdmax+1, &read_fds, NULL, NULL, NULL) == -1) {
perror("select");
exit(1);
}

//run through the existing connections looking for data to read
for(i = 0; i <= fdmax; i++) {

if (FD_ISSET(i, &read_fds)) { //we got one!!
if (i == listener) {
//handle new connections
addrlen = sizeof remoteaddr;
if ((newfd = accept(listener, (struct sockaddr *)&remoteaddr,
&addrlen)) == -1) {
perror("accept");
} else {
if (fcntl(i, F_SETFL, O_NONBLOCK) < 0) {
perror("fcntl");
}
if (setsockopt(i, SOL_SCTP, SCTP_NODELAY, &nodelay,
sizeof(nodelay)) < 0) {
perror("setsockopt");
}
FD_SET(newfd, &master); //add to master set
if (newfd > fdmax) {    //keep track of the maximum
fdmax = newfd;
}
}
} else {
//handle data from a client

if ((nbytes = recv(i, buf, sizeof buf, MSG_DONTWAIT )) <= 0) {
//got error or connection closed by client
if (nbytes == 0) {
//connection closed
printf("selectserver: socket %d hung up\n", i);
} else {
perror("recv");
}
close(i); //bye!
FD_CLR(i, &master); //remove from master set
} else {

fwrite(buf,nbytes,1,stdout);
}
}
}
}
}
}
int main(int argc, char *argv[]){
serve(init_server(atoi(argv[1])));

return 1;
}

----------------------------------------
client
---------------------------------------

#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <asm/ioctls.h>
#include <linux/sockios.h>
#include <netinet/in.h>
#include <netinet/sctp.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/poll.h>
#include <sys/time.h>
#include <signal.h>
#include <getopt.h>
#include <stdlib.h>
#include <string.h>

int nodelay = 1;
#define HOST_BUF_LEN 256
int init_client(int port, char *ip) {
int sd;
static struct sockaddr_in addr ;
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
addr.sin_addr.s_addr = inet_addr(ip);
if ((sd = socket(PF_INET, SOCK_SEQPACKET, IPPROTO_SCTP)) < 0) {
perror("socket");
}

if(connect(sd,(struct sockaddr *)&addr,sizeof(addr)) < 0) {
perror("connect");
return(-1);
}
if (fcntl(sd, F_SETFL, O_NONBLOCK) < 0) {
perror("fcntl");
goto errout;
}
if (setsockopt(sd, SOL_SCTP, SCTP_NODELAY, &nodelay,
sizeof(nodelay)) < 0) {
perror("setsockopt");
goto errout;
}
return sd;
errout:
close(sd);
return(-1);
}
void print_param(int sd) {
char buf[HOST_BUF_LEN];
int read_b;
while((read_b = fread(buf, 1, sizeof(buf), stdin))){
if ((send(sd, buf, read_b, 0)) == -1) {
perror("send");
}

}
perror("");

close (sd);
}
int usage(int argc){
if(argc != 3) {
printf ("usage: client dest_ip\n");
return (-1);
}
return 1;
}
int main(int argc,char *argv[]) {
if(usage(argc) > 0 ){
int sock;
if ((sock = init_client(atoi(argv[1]), argv[2])))
print_param(sock) ;
}
return 1;
}


------------------------------------------------
capture
-------------------------------------------

No.     Time        Source                Destination
Protocol Info
14885 11200.199016 192.168.1.119         192.168.1.233
SCTP     INIT

Frame 14885 (84 bytes on wire, 84 bytes captured)
Linux cooked capture
Internet Protocol, Src Addr: 192.168.1.119 (192.168.1.119), Dst Addr:
192.168.1.233 (192.168.1.233)
Stream Control Transmission Protocol, Src Port: 1031 (1031), Dst Port:
10000 (10000)
Source port: 1031
Destination port: 10000
Verification tag: 0x00000000
Checksum: 0x709a9cc2 (correct CRC32C)
INIT chunk (Outbound streams: 1, inbound streams: 33)
Chunk type: INIT (1)
0... .... = Bit: Stop processing of the packet
.0.. .... = Bit: Do not report
Chunk flags: 0x00
Chunk length: 34
Initiate tag: 0xf31ad461
Advertised receiver window credit (a_rwnd): 65535
Number of outbound streams: 1
Number of inbound streams: 33
Initial TSN: 1641290483
IPv4 address parameter (Address: 192.168.1.119)
Supported address types parameter (Supported types: IPv4)
Chunk padding: 0000

No.     Time        Source                Destination
Protocol Info
14886 11200.285549 192.168.1.233         192.168.1.119
SCTP     INIT_ACK

Frame 14886 (156 bytes on wire, 156 bytes captured)
Linux cooked capture
Internet Protocol, Src Addr: 192.168.1.233 (192.168.1.233), Dst Addr:
192.168.1.119 (192.168.1.119)
Stream Control Transmission Protocol, Src Port: 10000 (10000), Dst
Port: 1031 (1031)
Source port: 10000
Destination port: 1031
Verification tag: 0xf31ad461
Checksum: 0x95255afd (correct CRC32C)
INIT_ACK chunk (Outbound streams: 33, inbound streams: 33)
Chunk type: INIT_ACK (2)
0... .... = Bit: Stop processing of the packet
.0.. .... = Bit: Do not report
Chunk flags: 0x00
Chunk length: 108
Initiate tag: 0x65a4fdfd
Advertised receiver window credit (a_rwnd): 32767
Number of outbound streams: 33
Number of inbound streams: 33
Initial TSN: 1705311741
IPv4 address parameter (Address: 192.168.1.233)
State cookie parameter (Cookie length: 76 bytes)

No.     Time        Source                Destination
Protocol Info
14887 11200.286732 192.168.1.119         192.168.1.233
SCTP     COOKIE_ECHO

Frame 14887 (128 bytes on wire, 128 bytes captured)
Linux cooked capture
Internet Protocol, Src Addr: 192.168.1.119 (192.168.1.119), Dst Addr:
192.168.1.233 (192.168.1.233)
Stream Control Transmission Protocol, Src Port: 1031 (1031), Dst Port:
10000 (10000)
Source port: 1031
Destination port: 10000
Verification tag: 0x65a4fdfd
Checksum: 0x42ac8772 (correct CRC32C)
COOKIE_ECHO chunk (Cookie length: 76 bytes)
Chunk type: COOKIE_ECHO (10)
0... .... = Bit: Stop processing of the packet
.0.. .... = Bit: Do not report
Chunk flags: 0x00
Chunk length: 80
Cookie:  0001B1830000177065A4FDFDC0A80177C0A801E9
04072710...

No.     Time        Source                Destination
Protocol Info
14888 11200.809261 192.168.1.233         192.168.1.119
SCTP     COOKIE_ACK SACK

Frame 14888 (68 bytes on wire, 68 bytes captured)
Linux cooked capture
Internet Protocol, Src Addr: 192.168.1.233 (192.168.1.233), Dst Addr:
192.168.1.119 (192.168.1.119)
Stream Control Transmission Protocol, Src Port: 10000 (10000), Dst
Port: 1031 (1031)
Source port: 10000
Destination port: 1031
Verification tag: 0xf31ad461
Checksum: 0xb5c67036 (correct CRC32C)
COOKIE_ACK chunk
Chunk type: COOKIE_ACK (11)
0... .... = Bit: Stop processing of the packet
.0.. .... = Bit: Do not report
Chunk flags: 0x00
Chunk length: 4
SACK chunk (Cumulative TSN: 1641290482, a_rwnd: 32767, gaps: 0,
duplicate TSNs: 0)
Chunk type: SACK (3)
0... .... = Bit: Stop processing of the packet
.0.. .... = Bit: Do not report
Chunk flags: 0x00
Chunk length: 16
Cumulative TSN ACK: 1641290482
Advertised receiver window credit (a_rwnd): 32767
Number of gap acknowldgement blocks : 0
Number of duplicated TSNs: 0

No.     Time        Source                Destination
Protocol Info
14889 11200.812771 192.168.1.119         192.168.1.233
SCTP     DATA

Frame 14889 (320 bytes on wire, 320 bytes captured)
Linux cooked capture
Internet Protocol, Src Addr: 192.168.1.119 (192.168.1.119), Dst Addr:
192.168.1.233 (192.168.1.233)
Stream Control Transmission Protocol, Src Port: 1031 (1031), Dst Port:
10000 (10000)
Source port: 1031
Destination port: 10000
Verification tag: 0x65a4fdfd
Checksum: 0xe8e930c8 (correct CRC32C)
DATA chunk(ordered, complete segment, TSN: 1641290483, SID: 0,
SSN: 1, PPID: 0, payload length: 256 bytes)
Chunk type: DATA (0)
0... .... = Bit: Stop processing of the packet
.0.. .... = Bit: Do not report
Chunk flags: 0x03
... ...1 = E-Bit: Last segment
... ..1. = B-Bit: First segment
... .0.. = U-Bit: Ordered deliviery
Chunk length: 272
TSN: 1641290483
Stream Identifier: 0x0000
Stream sequence number: 1
Payload protocol identifier: not specified (0)
Data (256 bytes)

0000  2f 65 74 63 2f 67 64 6d 2f 50 72 65 53 65 73 73   /etc/gdm/
PreSess
0010  69 6f 6e 2f 44 65 66 61 75 6c 74 3a 20 52 65 67   ion/Default:
Reg
0020  69 73 74 65 72 69 6e 67 20 79 6f 75 72 20 73 65   istering your
se
0030  73 73 69 6f 6e 20 77 69 74 68 20 77 74 6d 70 20   ssion with
wtmp
0040  61 6e 64 20 75 74 6d 70 0a 2f 65 74 63 2f 67 64   and utmp./etc/
gd
0050  6d 2f 50 72 65 53 65 73 73 69 6f 6e 2f 44 65 66   m/PreSession/
Def
0060  61 75 6c 74 3a 20 72 75 6e 6e 69 6e 67 3a 20 2f   ault:
running: /
0070  75 73 72 2f 58 31 31 52 36 2f 62 69 6e 2f 73 65   usr/X11R6/bin/
se
0080  73 73 72 65 67 20 2d 61 20 2d 77 20 2f 76 61 72   ssreg -a -w /
var
0090  2f 6c 6f 67 2f 77 74 6d 70 20 2d 75 20 2f 76 61   /log/wtmp -u /
va
00a0  72 2f 72 75 6e 2f 75 74 6d 70 20 2d 78 20 22 2f   r/run/utmp -x
"/
00b0  76 61 72 2f 6c 69 62 2f 67 64 6d 2f 3a 30 2e 58   var/lib/gdm/:
0.X
00c0  73 65 72 76 65 72 73 22 20 2d 68 20 22 22 20 2d   servers" -h ""
-
00d0  6c 20 22 3a 30 22 20 22 66 72 6f 67 22 0a 2f 65   l ":0" "frog"./
e
00e0  74 63 2f 67 64 6d 2f 58 73 65 73 73 69 6f 6e 3a   tc/gdm/
Xsession:
00f0  20 42 65 67 69 6e 6e 69 6e 67 20 73 65 73 73 69    Beginning
sessi

No.     Time        Source                Destination
Protocol Info
14890 11200.814174 192.168.1.119         192.168.1.233
SCTP     DATA

Frame 14890 (320 bytes on wire, 320 bytes captured)
Linux cooked capture
Internet Protocol, Src Addr: 192.168.1.119 (192.168.1.119), Dst Addr:
192.168.1.233 (192.168.1.233)
Stream Control Transmission Protocol, Src Port: 1031 (1031), Dst Port:
10000 (10000)
Source port: 1031
Destination port: 10000
Verification tag: 0x65a4fdfd
Checksum: 0xb455a2ca (correct CRC32C)
DATA chunk(ordered, complete segment, TSN: 1641290484, SID: 0,
SSN: 1, PPID: 0, payload length: 256 bytes)
Chunk type: DATA (0)
0... .... = Bit: Stop processing of the packet
.0.. .... = Bit: Do not report
Chunk flags: 0x03
... ...1 = E-Bit: Last segment
... ..1. = B-Bit: First segment
... .0.. = U-Bit: Ordered deliviery
Chunk length: 272
TSN: 1641290484
Stream Identifier: 0x0000
Stream sequence number: 1
Payload protocol identifier: not specified (0)
Data (256 bytes)

0000  6f 6e 20 73 65 74 75 70 2e 2e 2e 0a 53 45 53 53   on
setup....SESS
0010  49 4f 4e 5f 4d 41 4e 41 47 45 52 3d 6c 6f 63 61
ION_MANAGER=loca
0020  6c 2f 64 65 62 69 61 6e 3a 2f 74 6d 70 2f 2e 49   l/debian:/
tmp/.I
0030  43 45 2d 75 6e 69 78 2f 37 33 39 0a 47 6e 6f 6d   CE-unix/
739.Gnom
0040  65 2d 4d 65 73 73 61 67 65 3a 20 67 6e 6f 6d 65   e-Message:
gnome
0050  5f 65 78 65 63 75 74 65 5f 61 73 79 6e 63 5f 77
_execute_async_w
0060  69 74 68 5f 65 6e 76 5f 66 64 73 3a 20 72 65 74   ith_env_fds:
ret
0070  75 72 6e 69 6e 67 20 2d 31 0a 6c 69 62 68 61 6c   urning
-1.libhal
0080  2e 63 20 37 36 37 20 3a 20 6f 72 67 2e 66 72 65   .c 767 :
org.fre
0090  65 64 65 73 6b 74 6f 70 2e 44 42 75 73 2e 45 72
edesktop.DBus.Er
00a0  72 6f 72 2e 53 65 72 76 69 63 65 44 6f 65 73 4e
ror.ServiceDoesN
00b0  6f 74 45 78 69 73 74 20 72 61 69 73 65 64 0a 22   otExist
raised."
00c0  53 65 72 76 69 63 65 20 22 6f 72 67 2e 66 72 65   Service
"org.fre
00d0  65 64 65 73 6b 74 6f 70 2e 48 61 6c 22 20 64 6f   edesktop.Hal"
do
00e0  65 73 20 6e 6f 74 20 65 78 69 73 74 22 0a 0a 0a   es not
exist"...
00f0  2a 2a 20 28 67 6e 6f 6d 65 2d 76 6f 6c 75 6d 65   ** (gnome-
volume

No.     Time        Source                Destination
Protocol Info
14891 11200.815494 192.168.1.119         192.168.1.233
SCTP     DATA

Frame 14891 (320 bytes on wire, 320 bytes captured)
Linux cooked capture
Internet Protocol, Src Addr: 192.168.1.119 (192.168.1.119), Dst Addr:
192.168.1.233 (192.168.1.233)
Stream Control Transmission Protocol, Src Port: 1031 (1031), Dst Port:
10000 (10000)
Source port: 1031
Destination port: 10000
Verification tag: 0x65a4fdfd
Checksum: 0x674439cb (correct CRC32C)
DATA chunk(ordered, complete segment, TSN: 1641290485, SID: 0,
SSN: 1, PPID: 0, payload length: 256 bytes)
Chunk type: DATA (0)
0... .... = Bit: Stop processing of the packet
.0.. .... = Bit: Do not report
Chunk flags: 0x03
... ...1 = E-Bit: Last segment
... ..1. = B-Bit: First segment
... .0.. = U-Bit: Ordered deliviery
Chunk length: 272
TSN: 1641290485
Stream Identifier: 0x0000
Stream sequence number: 1
Payload protocol identifier: not specified (0)
Data (256 bytes)

0000  2d 6d 61 6e 61 67 65 72 3a 38 34 37 29 3a 20 57   -manager:847):
W
0010  41 52 4e 49 4e 47 20 2a 2a 3a 20 6d 61 6e 61 67   ARNING **:
manag
0020  65 72 2e 63 2f 31 30 39 39 3a 20 73 65 65 6d 73   er.c/1099:
seems
0030  20 74 68 61 74 20 48 41 4c 20 69 73 20 6e 6f 74    that HAL is
not
0040  20 72 75 6e 6e 69 6e 67 0a 0a 47 6e 6f 6d 65 2d
running..Gnome-
0050  4d 65 73 73 61 67 65 3a 20 67 6e 6f 6d 65 5f 65   Message:
gnome_e
0060  78 65 63 75 74 65 5f 61 73 79 6e 63 5f 77 69 74
xecute_async_wit
0070  68 5f 65 6e 76 5f 66 64 73 3a 20 72 65 74 75 72   h_env_fds:
retur
0080  6e 69 6e 67 20 2d 31 0a 0a 2a 2a 20 28 67 6e 6f   ning -1..**
(gno
0090  6d 65 2d 63 75 70 73 2d 69 63 6f 6e 3a 38 35 33   me-cups-icon:
853
00a0  29 3a 20 57 41 52 4e 49 4e 47 20 2a 2a 3a 20 43   ): WARNING **:
C
00b0  6f 75 6c 64 20 6e 6f 74 20 73 74 61 72 74 20 74   ould not start
t
00c0  68 65 20 70 72 69 6e 74 65 72 20 74 72 61 79 20   he printer
tray
00d0  69 63 6f 6e 2c 20 62 65 63 61 75 73 65 20 74 68   icon, because
th
00e0  65 20 43 55 50 53 20 73 65 72 76 65 72 20 63 6f   e CUPS server
co
00f0  75 6c 64 20 6e 6f 74 20 62 65 20 63 6f 6e 74 61   uld not be
conta

No.     Time        Source                Destination
Protocol Info
14892 11200.816529 192.168.1.119         192.168.1.233
SCTP     DATA

Frame 14892 (72 bytes on wire, 72 bytes captured)
Linux cooked capture
Internet Protocol, Src Addr: 192.168.1.119 (192.168.1.119), Dst Addr:
192.168.1.233 (192.168.1.233)
Stream Control Transmission Protocol, Src Port: 1031 (1031), Dst Port:
10000 (10000)
Source port: 1031
Destination port: 10000
Verification tag: 0x65a4fdfd
Checksum: 0x0230a0a0 (correct CRC32C)
DATA chunk(ordered, complete segment, TSN: 1641290486, SID: 0,
SSN: 1, PPID: 0, payload length: 6 bytes)
Chunk type: DATA (0)
0... .... = Bit: Stop processing of the packet
.0.. .... = Bit: Do not report
Chunk flags: 0x03
... ...1 = E-Bit: Last segment
... ..1. = B-Bit: First segment
... .0.. = U-Bit: Ordered deliviery
Chunk length: 22
TSN: 1641290486
Stream Identifier: 0x0000
Stream sequence number: 1
Payload protocol identifier: not specified (0)
Chunk padding: 3030
Data (6 bytes)

0000  63 74 65 64 2e 0a                                 cted..

No.     Time        Source                Destination
Protocol Info
14893 11200.817927 192.168.1.119         192.168.1.233
SCTP     ABORT

Frame 14893 (56 bytes on wire, 56 bytes captured)
Linux cooked capture
Internet Protocol, Src Addr: 192.168.1.119 (192.168.1.119), Dst Addr:
192.168.1.233 (192.168.1.233)
Stream Control Transmission Protocol, Src Port: 1031 (1031), Dst Port:
10000 (10000)
Source port: 1031
Destination port: 10000
Verification tag: 0x65a4fdfd
Checksum: 0xa23208ad (correct CRC32C)
ABORT chunk
Chunk type: ABORT (6)
0... .... = Bit: Stop processing of the packet
.0.. .... = Bit: Do not report
Chunk flags: 0x00
... ...0 = T-Bit: Tag not reflected
Chunk length: 8
User initiated ABORT cause
Cause code: User initiated ABORT (0x000c)
Cause length: 4

No.     Time        Source                Destination
Protocol Info
14894 11200.870181 192.168.1.233         192.168.1.119
SCTP     SACK

Frame 14894 (64 bytes on wire, 64 bytes captured)
Linux cooked capture
Internet Protocol, Src Addr: 192.168.1.233 (192.168.1.233), Dst Addr:
192.168.1.119 (192.168.1.119)
Stream Control Transmission Protocol, Src Port: 10000 (10000), Dst
Port: 1031 (1031)
Source port: 10000
Destination port: 1031
Verification tag: 0xf31ad461
Checksum: 0xfea533ac (correct CRC32C)
SACK chunk (Cumulative TSN: 1641290484, a_rwnd: 32255, gaps: 0,
duplicate TSNs: 0)
Chunk type: SACK (3)
0... .... = Bit: Stop processing of the packet
.0.. .... = Bit: Do not report
Chunk flags: 0x00
Chunk length: 16
Cumulative TSN ACK: 1641290484
Advertised receiver window credit (a_rwnd): 32255
Number of gap acknowldgement blocks : 0
Number of duplicated TSNs: 0

No.     Time        Source                Destination
Protocol Info
14895 11200.906652 192.168.1.233         192.168.1.119
SCTP     SACK

Frame 14895 (64 bytes on wire, 64 bytes captured)
Linux cooked capture
Internet Protocol, Src Addr: 192.168.1.233 (192.168.1.233), Dst Addr:
192.168.1.119 (192.168.1.119)
Stream Control Transmission Protocol, Src Port: 10000 (10000), Dst
Port: 1031 (1031)
Source port: 10000
Destination port: 1031
Verification tag: 0xf31ad461
Checksum: 0x6e75f53e (correct CRC32C)
SACK chunk (Cumulative TSN: 1641290486, a_rwnd: 31993, gaps: 0,
duplicate TSNs: 0)
Chunk type: SACK (3)
0... .... = Bit: Stop processing of the packet
.0.. .... = Bit: Do not report
Chunk flags: 0x00
Chunk length: 16
Cumulative TSN ACK: 1641290486
Advertised receiver window credit (a_rwnd): 31993
Number of gap acknowldgement blocks : 0
Number of duplicated TSNs: 0

Report this thread to moderator Post Follow-up to this message
Old Post
Magda Muskala
03-22-08 12:19 AM

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