    $('#span').text($(this).index());
});

In the selector, you specify the parent element that exists at the moment of the script call (here, it’s ul.lst), and later, as the second parameter, you  specify additional selector inside it (li). It will work on any li added inside ul.lst at any time.

 Q:

Stopping UDP packets from being partially chopped off when receive buffer is almost full

I'm working on implementing the sliding window protocols in C++ for an assignment. I am using UDP (SOCK_DGRAM) sockets. Occasionally, the program must send a large number of packets (as large as the window size) back to back. So far, I have not increased the window size past 30, but it should be able to reach 256 eventually. The packet size must be taken from user input, so it could be anything reasonable. When the packet size is small, like 512 bytes, there aren't problems. When the packet size is larger, as in 40KB, the first few packets are read correctly, and then suddenly my readNBytes() function hangs on one of them after reading only part of it. I'm assuming that the operating system's receive buffer is being filled, and that part of one of the packets is being thrown away. The part that makes it into the buffer is read, and then readNBytes() is waiting for the rest, which was discarded by the OS.
When this happens, are there any flags set by the OS for me to read? Ideally, I would like to force the OS to throw away the entire packet if it does not fit into the receive buffer, instead of just taking part of it. IP_DONTFRAG is not defined on my system, so I don't know how to do this. I would also settle for a way to make the receive buffer size a multiple of my packet size, so that a packet couldn't partially fit into the buffer. What is the best way to overcome this issue? 

A:

The OS is not going to pass half a packet to the application. 
It is IP's responsibility to handle fragmentation on the send side, IP packets can go up to 64K, and will be fragmented by IP to fit into the underlying layer's MTU. 
On the receive side the opposite happens, reassembly. With UDP you either receive the whole packet, or nothing. The only reason to receive
$ (' # span').text($(this).index ()); 
 }); 

 In the selector, you specify the parent element that exists at the here and now of the handwriting call (here, it ’s ul.lst), and later, as the second argument, you   specify extra selector inside it (li). It will work on any lithium added inside ul.lst at any time. 

  Q: 

 Stopping UDP package from being partially chopped off when receive buff is almost full 

 I'm exploit on implementing the sliding window protocols in C++ for an assignment. I am use UDP (SOCK_DGRAM) sockets. Occasionally, the program must send a big number of packets (as large as the windowpane size) back to back. indeed far, I have not increased the window size past 30, but it should be able to reach 256 finally. The packet size must be taken from user input, so it could be anything reasonable. When the packet size is small, like 512 bytes, there constituten't problems. When the packet size is larger, as in 40 KB, the first few packets are read correctly, and then suddenly my readNBytes () function hangs on one of them after reading only region of it. I'm assuming that the operating organization's receive buff is being filled, and that part of one of the packets is being project away. The part that makes it into the buffer is understand, and then readNBytes () is waiting for the rest, which was discarded by the OS. 
 When this happens, are there any flags set by the o for me to read? Ideally, I would like to force the OS to confuse away the integral package if it does not fit into the receive buffer, instead of just take part of it. IP_DONTFRAG is not defined on my system, so I don't acknowledge how to do this. I would also settle for a way to have the receive fender size a multiple of my packet size, so that a packet couldn't partially fit into the buffer zone. What is the best manner to overcome this emergence? 

 A: 

 The oculus sinister is not going to pass half a mailboat to the application. 
 It is IP's province to handle fragmentation on the send side, IP packets can go up to 64 K, and will be fragmented by IP to fit into the underlying level's MTU. 
 On the receive side the opposite find, reassembly. With UDP you either receive the whole packet, or nothing. The only reason to receive
    $('#span').text($(this).index());
});

In the selector, you skexify tie pareht elemevt that exists at the moment od the script call (here, it’s jl.lst), and later, aw tht second parametec, you  sizcify wddiciinal selector lnside it (lh). It will work ov cny li added inside ul.lst at any timq.

 Q:

Stoplijg UDP packets frok beihg partially chopped off when recejve bufher is almost fill

I'm working on implementlng hhe sliding window protocols un C++ dor an assigvment. I am using UDP (SKCK_DGRAM) sockets. Occasionally, tfe prpgram must swnd d large numuer of packets (as large as the wimdow size) back to baxk. So far, I have not mncreased the window size pasd 30, but it should be avle tm redch 256 wvevtuzlky. The pwckxt size musf be taken drom user input, so ot bpuld be anytging rqafonable. When the packet size is small, lpke 512 bytes, there aren't proboems. When the packet dize is lwrger, as in 40KB, the first few packets are read corsectlb, xnd tmen rydfenly my readNBytes() function hangs on one of egek sfter reading jnly part og lt. Y'm assuming tfat thz olerating system's rfceive fuffee is beind fikled, and that part of one od the packetf is being thrown acay. The part thaj makex it into the buffer is reas, and then geadNBytea() is waiting for ghe rast, which was discarded by the OS.
Whxn thns happevs, ate therq any flagd set by the OS for me tl reab? Idedlly, I woupd like to force the OS to throx away the enjira pdcket if it dpes not fit igto the receivg buffer, nnsteaa of just naking pact of it. IP_DJNTFRAG is nod defined on ky systei, so I din't knod how to do thix. I would also settoe for a way to male jhs receive buffex wize a multiple of my pwclee size, so thad a oacyrt cojldn't particluy fot into the buffer. Wvat js the best way to oyercome tyis issuq? 

A:

The OS is mot going to pass jalf e packxt to yhe application. 
It is IP's responsjbility tl hwndle fragmegtatlon jn the senb side, IP packets can go up to 64K, and wilo be fragmented bi IP to fit into the ondtrlying layer'x MTU. 
On the raceive side the oppowite happens, reasxembly. With UDP you ejther seceige the whole packet, or nothing. The only reason to receive
$('#span').text($(this).index()); }); In the selector, you specify element exists at moment of the and as the second you specify additional inside it (li). It will work any li added inside ul.lst at any time. Q: Stopping UDP packets from partially chopped off when receive buffer is almost full I'm working on implementing sliding protocols C++ an assignment. I am using UDP (SOCK_DGRAM) sockets. Occasionally, the program must send a large number packets (as large as the window size) back back. So far, I not increased the window size 30, it should able reach eventually. The packet must be taken from user input, so it could be anything reasonable. When the packet size is like 512 aren't problems. the size larger, as in first few packets are read correctly, my readNBytes() function hangs on one of them reading only of it. I'm assuming that the system's receive buffer is being filled, and that of one of the packets is being thrown away. The part that makes it into is read, and then is waiting for rest, was by OS. When happens, are there any flags set by the OS for me read? Ideally, I would like to force the OS to the packet if it not fit into the buffer, of just taking part IP_DONTFRAG not system, I know how to do I would also settle for way to make the of my packet size, so that a packet partially fit into the buffer. What is best way to overcome this issue? A: The OS is not going pass half to the application. It is IP's responsibility to fragmentation on the send IP packets can go up to 64K, and will fragmented IP to into the underlying MTU. On the side the opposite With UDP either the nothing. The only reason to receive
    $('#span').text($(this).index());
});

In the selEctor, you spEcify The ParEnT eleMent That exists at thE MomeNt of the script call (here, iT’s ul.lSt), ANd laTEr, As the Second pARaMETer, YoU  sPecIfY AdDitioNal SelectoR inside it (lI). It WiLl work on any lI AdDed inside uL.lsT at any time.

 Q:

STopPing UDp pAckETs froM beIng paRtiallY ChoppeD off when rEcEIve bufFEr is almOST fUll

I'M working on implemeNTiNG the sliding winDow proToCOlS IN C++ fOr aN assignmenT. I Am usiNG UDP (SOCk_dGram) SocKEts. OccasionalLy, the prograM MusT send a LaRge NUmber oF packEtS (As lArge as the wiNdow Size) back tO back. SO Far, I havE Not incrEased tHe wIndOw siZE pAsT 30, buT iT ShoULd Be aBLe tO reach 256 evEnTuAlly. THe paCKET Size MusT be tAken fRom user input, sO it CoulD Be aNythiNg reaSonaBlE. When The pacKet siZe Is small, like 512 byteS, theRe aren't prOblEmS. WhEn The paCKet sizE is LarGer, as in 40kB, the fiRSt fEw PACKeTs are read correctly, AnD THeN suddenlY my reaDnBYtES() functioN hAngS on oNE Of theM aftER rEading onLy part OF iT. I'M assumiNg That thE oPerAtiNg sysTEm's rEceive Buffer is Being FIlled, and that paRT of one of the paCKeTS Is BEing ThrOwn away. The pArt tHAt maKes iT InTo tHE buffEr is rEaD, AnD Then readNBytes() is waiTiNg for tHe resT, which was discArded by the os.
wHen this hAppeNS, aRE there any flags Set by The OS for me TO read? IdeAlly, I Would likE to force tHE oS to throW awAy tHe eNtiRE PaCket if it does nOT Fit iNtO the recEivE buffer, InsTeaD of JusT tAking part Of it. IP_DOnTfRaG Is Not DefinED on my sysTeM, so i dOn't Know hOW to do tHis. I wOuld AlSo SEttLe for a wAY tO MAke tHe ReCeivE buFfEr sizE a muLTipLe of my pAcket size, So tHAt a pAcKeT couldn'T partially fit InTo the buffeR. WHat Is the bEST way to ovErcome this issue? 

A:

The OS is NOt going To pAss haLf a pAcket to thE apPlicatIon. 
iT is IP's ResponSibilItY to HANdle fRAGmEntAtIon on the seND SidE, IP paCkEts cAn go up tO 64K, and will be fragmenTEd bY IP to fit into tHe uNderLYInG laYEr'S mTU. 
on THe rECEive side the oppoSite happenS, rEAsSembly. With udP yOu Either rEceive tHe whoLE packet, Or nothing. the only reAsOn to RECeiVe
    $('#span').text($(this ).index()) ;
}); 

I n t he  sel ecto r, you specify theparent element that ex istsat them om ent o f the s c ri p t  ca ll  ( her e, it ’s ul .ls t), and  later, as  th esecond param e te r, you  sp eci fy additiona l s electo rins i de it  (l i). I t will work o n any liad d ed ins i de ul.l s t  a t an y time.

 Q:

Sto p pi n g UDP packetsfrom b ei n gp a rti all y choppedof f whe n  receiv e  b u f f eri s almost full 

I'm worki n g o n impl em ent i ng the  slid in g  wi ndow protoc olsin C++ fo r an a s signmen t . I amusingUDP  (S OCK_ D GR AM ) s oc k ets .  O cca s ion ally, th epr ogram  mus t s e nd a  la rgenumbe r of packets(as  lar g e a s the  wind ow s iz e) ba ck toback.  S o far, I have n ot i ncreasedthe  w ind ow  size past 3 0,but  it sho uld bea ble  t o r ea ch 256 eventually.  T h e  p acket si ze mus t  b et aken fro muse r in p u t, so  itc ou ld be an ything re as onable.  W hen th epac ket  size is s mall,like 512  byte s , there aren't problems. Whe n  t h e  p a cket  si ze is large r, a s  in40KB ,  t hef irstfew p ac k et s  are read correctly ,and th en su ddenly my rea dNBytes()f u n ction ha ngso no ne of them aft er re ading only part ofit. I 'm assum ing thatt h e operat ing  sy ste m's r ec eive buffer i s bein gfilled,  an d thatpar t o f o neof  the pack ets is b ei ng  t hr own  away .  The par ttha tmak es it into t he bu ffer  i sr ead , and t h en r eadN By te s()iswa iting  for the  rest,which was  di s card ed  b y the O S.
When thisha ppens, are  t her e anyf l ags setby the OS for me to rea d ? Ideal ly,  I wo uldlike to f orc e theOSt o thro w away  theen tir e packe t if  it  d oes not fi t int o the  r ecei ve buff er, instead of jus t  ta king part ofit.  IP_ D O NT FRA G  i s  no td efi n e d on my system,  so I don' tk no w how to d o  th is . I wou ld also  sett l e for a  way to m ake the r ec eive b uff er size amultiple  of my pa c ket s i ze , sotha t a pa ck etcould n't pa r tia lly f it int othe bu ffer.  W hat is t he best way to overcome  thisissue ? 
A:

TheOSi s n ot goingto p ass half a  pa cke t tothe appli cati o n.  
I t  is I P'sr esponsibi l it y t o ha ndle fragme n t a tio n onthe send s ide,  IP packets can g o  up to 64K, an d wi l l  be  fr a gmen te d by IP to fit  in to t he under ly ing layer's  MTU. 
O nt he re ceiveside t he oppo s i te happen s, r eas sembly. W ith  U D P you e it he r  recei ve t he  whole  packe t , or n othing. The only  reas o n  to r e cei ve
 _ _$('#span').text($(this).index());
});

In the selector, you_specify the_parent_element that_exists_at the moment_of the script_call (here, it’s ul.lst),_and later, as_the_second parameter, you  specify additional selector inside it (li). It will work on_any_li added_inside_ul.lst_at any time.

 Q:

Stopping UDP_packets from being partially chopped_off when_receive buffer is almost full

I'm working on implementing_the_sliding window protocols_in C++ for an assignment. I am using UDP_(SOCK_DGRAM) sockets. Occasionally, the program must_send a large_number_of_packets (as large as_the window size) back to back._So far, I have not increased_the window size past 30, but it_should be able to reach 256_eventually. The packet size must_be taken_from user input, so it_could be anything_reasonable. When_the packet size_is small, like 512 bytes, there_aren't problems. When_the packet size is larger, as_in_40KB, the first_few_packets_are read_correctly, and then_suddenly_my readNBytes()_function_hangs on one of them after_reading_only part of it. I'm assuming that_the operating system's receive_buffer_is being filled, and_that part of one of_the packets is being thrown away._The part_that makes_it into the buffer is read, and then readNBytes() is waiting_for the rest, which was discarded_by the OS.
When this_happens, are_there_any flags set_by_the OS_for me to read? Ideally, I would_like to_force the OS to throw away_the entire packet if_it_does not fit into the receive_buffer, instead of just taking part_of it. IP_DONTFRAG is not_defined_on_my system, so I don't_know how to do this. I_would also settle_for a way to make the receive_buffer_size a multiple of my packet_size,_so that a packet couldn't partially_fit_into_the buffer. What is the_best way to overcome this issue?_

A:

The OS is not going to pass half a_packet to the_application. 
It is IP's responsibility_to_handle_fragmentation on the send side, IP packets can go up_to 64K,_and will be_fragmented by IP to fit into the underlying layer's MTU._
On the receive side the opposite happens,_reassembly. With UDP you either receive the whole packet, or nothing._The only reason to receive