static int handleItem(uvast sourceEngineId, unsigned int clientId,
Object clientServiceData)
{
Sdr sdr = getIonsdr();
ZcoReader reader;
char buffer[MAX_LINE_LEN + 1];
zco_start_receiving(clientServiceData, &reader);
memset(buffer, 0, sizeof buffer);
zco_receive_source(sdr, &reader, MAX_LINE_LEN, buffer);
printf("%s", buffer);
return 0;
}
int main(int argc, char **argv)
{
Sdr sdr;
Object txExtent;
Object txBundleZco;
Object txNewBundle;
BpDelivery rxDlv;
int rxContentLength;
ZcoReader rxReader;
int rxLen;
char rxContent[sizeof(testLine)];
/* Start ION */
ionstart_default_config("loopback-ltp/loopback.ionrc",
NULL,
"loopback-ltp/loopback.ltprc",
"loopback-ltp/loopback.bprc",
"loopback-ltp/loopback.ipnrc",
NULL);
/* Attach to ION */
fail_unless(bp_attach() >= 0);
sdr = bp_get_sdr();
/* Send the loopback bundle */
sdr_begin_xn(sdr);
txExtent = sdr_malloc(sdr, sizeof(testLine) - 1);
fail_unless(txExtent != 0);
sdr_write(sdr, txExtent, testLine, sizeof(testLine) - 1);
txBundleZco = zco_create(sdr, ZcoSdrSource, txExtent, 0, sizeof(testLine) - 1);
fail_unless(sdr_end_xn(sdr) >= 0 && txBundleZco != 0);
fail_unless(bp_send(NULL, testEid, NULL, 300, BP_STD_PRIORITY,
NoCustodyRequested, 0, 0, NULL, txBundleZco, &txNewBundle) > 0);
/* Receive the loopback bundle */
fail_unless(bp_open(testEid, &rxSap) >= 0);
fail_unless(bp_receive(rxSap, &rxDlv, IONTEST_DEFAULT_RECEIVE_WAIT) >= 0);
fail_unless(rxDlv.result == BpPayloadPresent);
sdr_begin_xn(sdr);
rxContentLength = zco_source_data_length(sdr, rxDlv.adu);
fail_unless(rxContentLength == sizeof(testLine) - 1);
zco_start_receiving(rxDlv.adu, &rxReader);
rxLen = zco_receive_source(sdr, &rxReader, rxContentLength,
rxContent);
fail_unless(rxLen == rxContentLength);
fail_unless(sdr_end_xn(sdr) >= 0);
bp_release_delivery(&rxDlv, 1);
bp_close(rxSap);
/* Detach from ION */
writeErrmsgMemos();
bp_detach();
/* Compare the received data */
rxContent[sizeof(rxContent) - 1] = '\0';
fail_unless(strncmp(rxContent, testLine, sizeof(testLine)) == 0);
/* Stop ION */
ionstop();
CHECK_FINISH;
}
static int handleGreenSegment(AcqWorkArea *work, LtpSessionId *sessionId,
unsigned char endOfBlock, unsigned int offset,
unsigned int length, Object zco, unsigned int *buflen, char **buffer)
{
Sdr sdr = getIonsdr();
static LtpSessionId currentSessionId = { 0, 0 };
static unsigned int currentOffset = 0;
unsigned int fillLength;
ZcoReader reader;
int result;
if (zco == 0) /* Import session canceled. */
{
bpCancelAcq(work);
currentSessionId.sourceEngineId = 0;
currentSessionId.sessionNbr = 0;
currentOffset = 0;
return 0;
}
if (zco_source_data_length(sdr, zco) != length)
{
return 0; /* Just discard the segment. */
}
if (sessionId->sourceEngineId != currentSessionId.sourceEngineId
|| sessionId->sessionNbr != currentSessionId.sessionNbr)
{
/* Did not receive end-of-block segment for the
* block that was being received. Discard the
* partially received bundle in the work area,
* if any. */
bpCancelAcq(work);
currentSessionId.sourceEngineId = 0;
currentSessionId.sessionNbr = 0;
currentOffset = 0;
}
if (currentOffset == 0)
{
/* Start new green bundle acquisition. */
if (bpBeginAcq(work, 0, NULL) < 0)
{
putErrmsg("Can't begin acquisition of bundle.", NULL);
return -1;
}
currentSessionId.sourceEngineId = sessionId->sourceEngineId;
currentSessionId.sessionNbr = sessionId->sessionNbr;
}
if (offset < currentOffset) /* Out of order. */
{
return 0; /* Just discard the segment. */
}
if (offset > currentOffset)
{
/* Convergence layer must not deliver incomplete
* bundles to BP. Practically speaking, this
* gap in segment sequence must be treated as
* malformation of the bundle. */
work->malformed = 1;
/* But continue bundle acquisition anyway, in
* case the incomplete bundle is useful for some
* diagnostic purpose. */
fillLength = offset - currentOffset;
if (fillLength > *buflen)
{
/* Make buffer big enough for the fill
* data. */
if (*buffer)
{
MRELEASE(*buffer);
*buflen = 0;
}
*buffer = MTAKE(fillLength);
if (*buffer == NULL)
{
/* Gap is too large to fill.
* Might be a DOS attack; cancel
* acquisition. */
bpCancelAcq(work);
currentSessionId.sourceEngineId = 0;
currentSessionId.sessionNbr = 0;
currentOffset = 0;
return 0;
}
*buflen = fillLength;
}
memset(*buffer, 0, fillLength);
if (bpContinueAcq(work, *buffer, (int) fillLength, 0) < 0)
{
putErrmsg("Can't insert bundle fill data.", NULL);
return -1;
}
currentOffset += fillLength;
}
if (length > *buflen)
{
/* Make buffer big enough for the green data. */
if (*buffer)
{
MRELEASE(*buffer);
*buflen = 0;
}
*buffer = MTAKE(length);
if (*buffer == NULL)
{
/* Segment is too large. Might be a
* DOS attack; cancel acquisition. */
bpCancelAcq(work);
currentSessionId.sourceEngineId = 0;
currentSessionId.sessionNbr = 0;
currentOffset = 0;
return 0;
}
*buflen = length;
}
/* Extract data from segment ZCO so that it can be
* appended to the bundle acquisition ZCO. Note
* that we're breaking the "zero-copy" model here;
* it would be better to have an alternate version
* of bpContinueAcq that uses zco_clone_source_data
* to append the segment ZCO's source data to the
* acquisition ZCO in the work area. (TODO) */
zco_start_receiving(zco, &reader);
CHKERR(sdr_begin_xn(sdr));
result = zco_receive_source(sdr, &reader, length, *buffer);
if (sdr_end_xn(sdr) < 0 || result < 0)
{
putErrmsg("Failed reading green segment data.", NULL);
return -1;
}
if (bpContinueAcq(work, *buffer, (int) length, 0) < 0)
{
putErrmsg("Can't continue bundle acquisition.", NULL);
return -1;
}
currentOffset += length;
if (endOfBlock)
{
if (bpEndAcq(work) < 0)
{
putErrmsg("Can't end acquisition of bundle.", NULL);
return -1;
}
currentSessionId.sourceEngineId = 0;
currentSessionId.sessionNbr = 0;
currentOffset = 0;
}
return 0;
}
static void *receivePdus(void *parm)
{
RxThreadParms *parms = (RxThreadParms *) parm;
char ownEid[64];
Sdr sdr;
BpDelivery dlv;
int contentLength;
ZcoReader reader;
unsigned char *buffer;
buffer = MTAKE(CFDP_MAX_PDU_SIZE);
if (buffer == NULL)
{
putErrmsg("bputa receiver thread can't get buffer.", NULL);
parms->running = 0;
return NULL;
}
isprintf(ownEid, sizeof ownEid, "ipn:" UVAST_FIELDSPEC ".%u",
getOwnNodeNbr(), CFDP_RECV_SVC_NBR);
if (bp_open(ownEid, &(parms->rxSap)) < 0)
{
MRELEASE(buffer);
putErrmsg("CFDP can't open own 'recv' endpoint.", ownEid);
parms->running = 0;
return NULL;
}
sdr = bp_get_sdr();
writeMemo("[i] bputa input has started.");
while (parms->running)
{
if (bp_receive(parms->rxSap, &dlv, BP_BLOCKING) < 0)
{
putErrmsg("bputa bundle reception failed.", NULL);
parms->running = 0;
continue;
}
switch (dlv.result)
{
case BpEndpointStopped:
parms->running = 0;
break;
case BpPayloadPresent:
contentLength = zco_source_data_length(sdr, dlv.adu);
CHKNULL(sdr_begin_xn(sdr));
zco_start_receiving(dlv.adu, &reader);
if (zco_receive_source(sdr, &reader, contentLength,
(char *) buffer) < 0)
{
sdr_cancel_xn(sdr);
putErrmsg("bputa can't receive bundle ADU.",
itoa(contentLength));
parms->running = 0;
continue;
}
if (sdr_end_xn(sdr) < 0)
{
putErrmsg("bputa can't handle bundle delivery.",
NULL);
parms->running = 0;
continue;
}
if (cfdpHandleInboundPdu(buffer, contentLength) < 0)
{
putErrmsg("bputa can't handle inbound PDU.",
NULL);
parms->running = 0;
}
break;
default:
break;
}
bp_release_delivery(&dlv, 1);
/* Make sure other tasks have a chance to run. */
sm_TaskYield();
}
bp_close(parms->rxSap);
MRELEASE(buffer);
writeMemo("[i] bputa input has stopped.");
return NULL;
}
static void *getBundles(void *parm)
{
RxThreadParms *parms = (RxThreadParms *) parm;
char ownEid[64];
Sdr sdr = getIonsdr();
BpDelivery dlv;
uvast profNum;
Scalar seqNum;
char type;
unsigned int aduLength;
int bytesRemaining;
ZcoReader reader;
unsigned char *buffer;
int bytesToRead;
int sdnvLength;
unsigned char *cursor;
isprintf(ownEid, sizeof ownEid, "ipn:" UVAST_FIELDSPEC ".%d",
getOwnNodeNbr(), DTPC_RECV_SVC_NBR);
if (bp_open(ownEid, &(parms->rxSap)) < 0)
{
putErrmsg("DTPC can't open own 'recv' endpoint.", ownEid);
parms->running = 0;
return NULL;
}
writeMemo("[i] dtpcd receiver thread has started.");
while (parms->running)
{
if (bp_receive(parms->rxSap, &dlv, BP_BLOCKING) < 0)
{
putErrmsg("dtpcd bundle reception failed.", NULL);
parms->running = 0;
continue;
}
switch (dlv.result)
{
case BpEndpointStopped:
parms->running = 0;
break;
case BpPayloadPresent:
CHKNULL(sdr_begin_xn(sdr));
/* Since the max length of a Sdnv is 10 bytes,
* read 21 bytes to be sure that the Profile
* and Sequence number Sdnvs plus the type
* were read. */
aduLength = zco_source_data_length(sdr, dlv.adu);
bytesRemaining = aduLength;
if (aduLength < 21) /* Just in case we receive
* a very small adu. */
{
bytesToRead = aduLength;
}
else
{
bytesToRead = 21;
}
buffer = MTAKE(bytesToRead);
if (buffer == NULL)
{
putErrmsg("Out of memory.",NULL);
return NULL;
}
cursor = buffer;
zco_start_receiving(dlv.adu, &reader);
if (zco_receive_headers(sdr, &reader, bytesToRead,
(char *) buffer) < 0)
{
putErrmsg("dtpcd can't receive ADU header.",
itoa(bytesToRead));
sdr_cancel_xn(sdr);
MRELEASE(buffer);
parms->running = 0;
continue;
}
type = *cursor; /* Get the type byte. */
cursor++;
bytesRemaining--;
sdnvLength = decodeSdnv(&profNum, cursor);
cursor += sdnvLength;
bytesRemaining -= sdnvLength;
sdnvLength = sdnvToScalar(&seqNum, cursor);
cursor += sdnvLength;
bytesRemaining -= sdnvLength;
/* Mark remaining bytes as source data. */
zco_delimit_source(sdr, dlv.adu, cursor - buffer,
bytesRemaining);
zco_strip(sdr, dlv.adu);
MRELEASE(buffer);
if (sdr_end_xn(sdr) < 0)
{
putErrmsg("dtpcd can't handle bundle delivery.",
NULL);
parms->running = 0;
continue;
}
switch (type)
{
case 0x00: /* Received an adu. */
switch (handleInAdu(sdr, &dlv, profNum, seqNum))
{
case -1:
putErrmsg("dtpcd can't handle inbound \
adu.", NULL);
parms->running = 0;
continue;
case 1:
if (parseInAdus(sdr) < 0)
{
putErrmsg("dtpcd can't parse \
inbound adus.", NULL);
parms->running = 0;
continue;
}
case 0:
/* Intentional fall-through to
* next case. */
default:
if (dlv.ackRequested)
{
if (sendAck(parms->txSap,
profNum, seqNum,
&dlv) < 0)
{
putErrmsg("dtpcd can't \
send ack.", NULL);
parms->running = 0;
continue;
}
}
break;
}
break;
case 0x01: /* Received an ACK. */
if (handleAck(sdr, &dlv, profNum, seqNum) < 0)
{
putErrmsg("dtpcd can't handle ACK.",
NULL);
parms->running = 0;
continue;
}
break;
default:
writeMemo("[?] Invalid item type. Corrupted \
item?");
break;
}
default:
break;
}
static int processCmdFile(Sdr sdr, BpDelivery *dlv)
{
int contentLength;
ZcoReader reader;
int len;
char *content;
char *endOfContent;
char *line;
char *delimiter;
char *nextLine;
int lineLength;
char *fileName = NULL;
int opsFile = -1;
contentLength = zco_source_data_length(sdr, dlv->adu);
if (contentLength > 64000)
{
putErrmsg("lgagent: bundle content length > 64000, ignored.",
itoa(contentLength));
return 0;
}
content = MTAKE(contentLength + 1);
if (content == NULL)
{
putErrmsg("lgagent: no space for bundle content.", NULL);
return -1;
}
zco_start_receiving(dlv->adu, &reader);
CHKERR(sdr_begin_xn(sdr));
len = zco_receive_source(sdr, &reader, contentLength, content);
if (sdr_end_xn(sdr) < 0)
{
return -1;
}
if (len < 0)
{
MRELEASE(content);
putErrmsg("lgagent: can't receive bundle content.", NULL);
return -1;
}
endOfContent = content + contentLength;
*endOfContent = 0;
line = content;
while (line < endOfContent)
{
delimiter = strchr(line, '\n'); /* LF (newline) */
if (delimiter == NULL) /* No LF or CRLF */
{
writeMemoNote("[?] lgagent: non-terminated line, \
discarding bundle content", content);
closeOpsFile(&opsFile);
fileName = NULL;
break; /* Out of loop. */
}
nextLine = delimiter + 1;
lineLength = nextLine - line;
*delimiter = 0; /* Strip off the LF. */
if (lineLength == 1) /* Empty line. */
{
line = nextLine;
continue;
}
/* Case 1: line is start of an operations file. */
if (*line == '[') /* Start loading file. */
{
if (fileName)
{
putErrmsg("lgagent: '[' line before end of \
load, no further activity.", itoa(line - content));
closeOpsFile(&opsFile);
fileName = NULL;
break; /* Out of loop. */
}
/* Remainder of line is file name. */
fileName = line + 1;
opsFile = iopen(fileName, O_RDWR | O_CREAT, 0777);
if (opsFile < 0)
{
putSysErrmsg("lgagent: can't open operations \
file name, no further activity", fileName);
fileName = NULL;
break; /* Out of loop. */
}
#ifdef TargetFFS
closeOpsFile(&opsFile);
#endif
line = nextLine;
continue;
}
