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32 …that the embedded device always will communicate with a full-scale TCP/IP implementation running o…
34 …that is used to transfer e-mail. The uIP is mostly concerned with the TCP and IP protocols and upp…
35 …that is situated between the two networks. If the maximum packet size of the other network is smal…
37 …that deal with the host to host communication and those that deal with communication between the a…
38 …that affect host-to-host communication are implemented. However, in order to reduce code size, we …
45 …that depend on timers, such as delayed acknowledgments, retransmissions and round-trip time estima…
49 …that covers the data and header portions of the TCP and IP packets. Since the calculation of this …
56 …that arrive when the application is processing the data must be queued, either by the network devi…
57 …that is used for incoming packets is also used for the TCP/IP headers of outgoing data. If the app…
58 …le to handle and the maximum amount of simultaneous connections. A device that will be sending lar…
61 …without the overhead of full multi-threading, and a "raw" event-based API that is nore low-level t…
66 …ents. An application running on top of uIP is implemented as a C function that is called by uIP in…
67 uIP is different from other TCP/IP stacks in that it requires help from the application when doing …
68 …that the application may be able to regenerate sent data and lets the application take part in ret…
70 …that uIP calls whenever an event occurs. Each event has a corresponding test function that is used…
72 …a class="el" href="a00088.html">uip_conn</a> structure for the connection that currently is handle…
76 …that all data sent from the application does not arrive at the receiver, and the application may u…
77 …he data. If the application needs RAM space for producing the actual data that should be sent, the…
80 …that the application takes an active part in performing the retransmission. When uIP decides that …
81 …that was previously sent. From the application's standpoint, performing a retransmission is not di…
86 There are two fatal errors that can happen to a connection, either that the connection was aborted …
89 …that a connection is idle, which allows the application to close connections that have been idle f…
126 …t in the network and has to be retransmitted, it also sends an "ok". Note that this example actual…
129 …lication in that it listens to a port for incoming connections and responds to data sent to it wit…
130 … application is implemented. The reason for the increase in complexity is that if data should be l…
131 …that as long as the "Welcome!" message has not been acknowledged by the remote host, it might have…
133 …since it knows that the previous welcome message hasn't been acknowledged. If the application is i…
197 This example shows a simple application that connects to a host, sends an HTTP request for a file a…
225 …nce this is the only data that is sent, the application knows that if it needs to retransmit any d…
226 …using the function device_enqueue(). It is important to note that this example assumes that this f…
227 …0f1f56852ccfccbbad6c5d8">uip_stop()</a>. The application can then be sure that it will not receive…
229 This example shows a very simple file server application that listens to two ports and uses the por…
270 …that should be sent and the size of the data that is left to send. When a remote host connects to …
273 …that has showed itself to be useful for writing larger protocol implementations than the previous …
303 The function starts with dealing with any error conditions that might have happened by checking if …
304 …lizing the application state for the connection. Since it may be the case that data should be sent…
364 …text message. The "state" variable can be either "STATE_WAITING", meaning that the application is …
366 …e to be "STATE_WAITING" and the "textlen" variable to be zero, indicating that there is no message…
368 …that previously was sent has been acknowleged by the receiving host. This acked() function first r…
369 …that is to be sent. It is called by the event handler function when new data has been received, wh…
370 It is important to note that the senddata() function never should affect the application state; thi…
375 …that examines the packet. The IP layer does a few simple checks such as if the destination IP addr…
377 IP fragment reassembly is implemented using a separate buffer that holds the packet to be reassembl…
386 …vents. Incoming packets are parsed by TCP and if the packet contains data that is to be delivered …
391 …lso, uIP does not buffer sent packets and a sliding window implementation that does not buffer sen…
392 It is important to note that even though most TCP implementations use the sliding window algorithm,…
395 …that has unacknowledged data in the network. When an acknowledgment is received, the current value…
398 …that the application takes an active part in performing the retransmission. When uIP decides that …
414 …that only handles a single outstanding TCP segment will interact poorly with the delayed acknowled…
416 It should be noted, however, that since small systems running uIP are not very likely to have large…