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/*
udpclo.c: BP UDP-based convergence-layer output
daemon. Note that this convergence-layer
output daemon is a "promiscuous" CLO daemon
which can transmit bundles to any number of
different peers.
Author: Ted Piotrowski, APL
Scott Burleigh, JPL
Copyright (c) 2006, California Institute of Technology.
ALL RIGHTS RESERVED. U.S. Government Sponsorship
acknowledged.
*/
#include "udpcla.h"
static sm_SemId udpcloSemaphore(sm_SemId *semid)
{
static sm_SemId semaphore = -1;
if (semid)
{
semaphore = *semid;
}
return semaphore;
}
static void shutDownClo() /* Commands CLO termination. */
{
sm_SemEnd(udpcloSemaphore(NULL));
}
/* * * Main thread functions * * * */
#if defined (VXWORKS) || defined (RTEMS) || defined (bionic)
int udpclo(int a1, int a2, int a3, int a4, int a5,
int a6, int a7, int a8, int a9, int a10)
{
#else
int main(int argc, char *argv[])
{
#endif
unsigned char *buffer;
VOutduct *vduct;
PsmAddress vductElt;
Sdr sdr;
Outduct outduct;
ClProtocol protocol;
Outflow outflows[3];
int i;
unsigned short portNbr;
unsigned int hostNbr;
struct sockaddr socketName;
struct sockaddr_in *inetName;
Object bundleZco;
BpExtendedCOS extendedCOS;
char destDuctName[MAX_CL_DUCT_NAME_LEN + 1];
unsigned int bundleLength;
int ductSocket = -1;
int bytesSent;
if (bpAttach() < 0)
{
putErrmsg("udpclo can't attach to BP.", NULL);
return -1;
}
buffer = MTAKE(UDPCLA_BUFSZ);
if (buffer == NULL)
{
putErrmsg("No memory for UDP buffer in udpclo.", NULL);
return -1;
}
findOutduct("udp", "*", &vduct, &vductElt);
if (vductElt == 0)
{
putErrmsg("No such udp duct.", "*");
MRELEASE(buffer);
return -1;
}
if (vduct->cloPid != ERROR && vduct->cloPid != sm_TaskIdSelf())
{
putErrmsg("CLO task is already started for this duct.",
itoa(vduct->cloPid));
MRELEASE(buffer);
return -1;
}
/* All command-line arguments are now validated. */
sdr = getIonsdr();
CHKZERO(sdr_begin_xn(sdr));
sdr_read(sdr, (char *) &outduct, sdr_list_data(sdr, vduct->outductElt),
sizeof(Outduct));
sdr_read(sdr, (char *) &protocol, outduct.protocol, sizeof(ClProtocol));
sdr_exit_xn(sdr);
if (protocol.nominalRate == 0)
{
vduct->xmitThrottle.nominalRate = DEFAULT_UDP_RATE;
}
else
{
vduct->xmitThrottle.nominalRate = protocol.nominalRate;
}
memset((char *) outflows, 0, sizeof outflows);
outflows[0].outboundBundles = outduct.bulkQueue;
outflows[1].outboundBundles = outduct.stdQueue;
outflows[2].outboundBundles = outduct.urgentQueue;
for (i = 0; i < 3; i++)
{
outflows[i].svcFactor = 1 << i;
}
/* Set up signal handling. SIGTERM is shutdown signal. */
oK(udpcloSemaphore(&(vduct->semaphore)));
isignal(SIGTERM, shutDownClo);
/* Can now begin transmitting to remote duct. */
writeMemo("[i] udpclo is running.");
while (!(sm_SemEnded(vduct->semaphore)))
{
if (bpDequeue(vduct, outflows, &bundleZco, &extendedCOS,
destDuctName, outduct.maxPayloadLen, 0) < 0)
{
sm_SemEnd(udpcloSemaphore(NULL));/* Stop. */
continue;
}
if (bundleZco == 0) /* Interrupted. */
{
continue;
}
parseSocketSpec(destDuctName, &portNbr, &hostNbr);
if (portNbr == 0)
{
portNbr = BpUdpDefaultPortNbr;
}
portNbr = htons(portNbr);
if (hostNbr == 0) /* Can't send bundle. */
{
writeMemoNote("[?] Can't get IP address for host",
destDuctName);
CHKZERO(sdr_begin_xn(sdr));
zco_destroy(sdr, bundleZco);
if (sdr_end_xn(sdr) < 0)
{
putErrmsg("Can't destroy ZCO reference.", NULL);
sm_SemEnd(udpcloSemaphore(NULL));
}
continue;
}
hostNbr = htonl(hostNbr);
memset((char *) &socketName, 0, sizeof socketName);
inetName = (struct sockaddr_in *) &socketName;
inetName->sin_family = AF_INET;
inetName->sin_port = portNbr;
memcpy((char *) &(inetName->sin_addr.s_addr),
(char *) &hostNbr, 4);
CHKZERO(sdr_begin_xn(sdr));
bundleLength = zco_length(sdr, bundleZco);
sdr_exit_xn(sdr);
bytesSent = sendBundleByUDP(&socketName, &ductSocket,
bundleLength, bundleZco, buffer);
if (bytesSent < bundleLength)
{
sm_SemEnd(udpcloSemaphore(NULL));/* Stop. */
continue;
}
/* Make sure other tasks have a chance to run. */
sm_TaskYield();
}
if (ductSocket != -1)
{
closesocket(ductSocket);
}
writeErrmsgMemos();
writeMemo("[i] udpclo duct has ended.");
MRELEASE(buffer);
ionDetach();
return 0;
}
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